fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55
  56 #include "nfs4_fs.h"
  57 #include "nfs4trace.h"
  58 #include "internal.h"
  59 #include "nfs4idmap.h"
  60 #include "nfs4session.h"
  61 #include "pnfs.h"
  62 #include "netns.h"
  63
  64 #define NFSDBG_FACILITY         NFSDBG_XDR
  65
  66 /* Mapping from NFS error code to "errno" error code. */
  67 #define errno_NFSERR_IO         EIO
  68
  69 struct compound_hdr;
  70 static int nfs4_stat_to_errno(int);
  71 static void encode_layoutget(struct xdr_stream *xdr,
  72                              const struct nfs4_layoutget_args *args,
  73                              struct compound_hdr *hdr);
  74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  75                              struct nfs4_layoutget_res *res);
  76
  77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  78 #ifdef DEBUG
  79 #define NFS4_MAXTAGLEN          20
  80 #else
  81 #define NFS4_MAXTAGLEN          0
  82 #endif
  83
  84 /* lock,open owner id:
  85  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  86  */
  87 #define pagepad_maxsz           (1)
  88 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  89 #define lock_owner_id_maxsz     (1 + 1 + 4)
  90 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  91 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  92 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  93 #define op_encode_hdr_maxsz     (1)
  94 #define op_decode_hdr_maxsz     (2)
  95 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  96 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  97 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  98 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  99 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
 100                                 (NFS4_FHSIZE >> 2))
 101 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
 102 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
 103 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
 104 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
 105 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
 106                                 ((3+NFS4_FHSIZE) >> 2))
 107 #define nfs4_fattr_bitmap_maxsz 4
 108 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 109 #define nfstime4_maxsz          (3)
 110 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 111 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 112 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 113 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 114 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 115 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 116 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 117 #else
 118 #define nfs4_label_maxsz        0
 119 #endif
 120 /* We support only one layout type per file system */
 121 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 122 /* This is based on getfattr, which uses the most attributes: */
 123 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 124                                 3*nfstime4_maxsz + \
 125                                 nfs4_owner_maxsz + \
 126                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 127                                  decode_mdsthreshold_maxsz))
 128 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 129                                 nfs4_fattr_value_maxsz)
 130 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 131 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 132                                  1 + 2 + 1 + \
 133                                 nfs4_owner_maxsz + \
 134                                 nfs4_group_maxsz + \
 135                                 nfs4_label_maxsz + \
 136                                 1 + nfstime4_maxsz + \
 137                                 1 + nfstime4_maxsz)
 138 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 139 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 140 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 141 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 142 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 143 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 144  * layout types will be returned.
 145  */
 146 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 147                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 148 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 149 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 150 #define encode_setclientid_maxsz \
 151                                 (op_encode_hdr_maxsz + \
 152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                 /* client name */ \
 154                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 155                                 1 /* sc_prog */ + \
 156                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 157                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 158                                 1) /* sc_cb_ident */
 159 #define decode_setclientid_maxsz \
 160                                 (op_decode_hdr_maxsz + \
 161                                 2 /* clientid */ + \
 162                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 163                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 164                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 165 #define encode_setclientid_confirm_maxsz \
 166                                 (op_encode_hdr_maxsz + \
 167                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 168 #define decode_setclientid_confirm_maxsz \
 169                                 (op_decode_hdr_maxsz)
 170 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 171 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 172 #define encode_lookupp_maxsz    (op_encode_hdr_maxsz)
 173 #define decode_lookupp_maxsz    (op_decode_hdr_maxsz)
 174 #define encode_share_access_maxsz \
 175                                 (2)
 176 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 177 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 178 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 179 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 180                                 2 + encode_share_access_maxsz + 2 + \
 181                                 open_owner_id_maxsz + \
 182                                 encode_opentype_maxsz + \
 183                                 encode_claim_null_maxsz)
 184 #define decode_space_limit_maxsz        (3)
 185 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 186 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 187                                 decode_space_limit_maxsz + \
 188                                 decode_ace_maxsz)
 189 #define decode_change_info_maxsz        (5)
 190 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 191                                 decode_stateid_maxsz + \
 192                                 decode_change_info_maxsz + 1 + \
 193                                 nfs4_fattr_bitmap_maxsz + \
 194                                 decode_delegation_maxsz)
 195 #define encode_open_confirm_maxsz \
 196                                 (op_encode_hdr_maxsz + \
 197                                  encode_stateid_maxsz + 1)
 198 #define decode_open_confirm_maxsz \
 199                                 (op_decode_hdr_maxsz + \
 200                                  decode_stateid_maxsz)
 201 #define encode_open_downgrade_maxsz \
 202                                 (op_encode_hdr_maxsz + \
 203                                  encode_stateid_maxsz + 1 + \
 204                                  encode_share_access_maxsz)
 205 #define decode_open_downgrade_maxsz \
 206                                 (op_decode_hdr_maxsz + \
 207                                  decode_stateid_maxsz)
 208 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 209                                  1 + encode_stateid_maxsz)
 210 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 211                                  decode_stateid_maxsz)
 212 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 213                                  encode_stateid_maxsz + \
 214                                  encode_attrs_maxsz)
 215 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 216                                  nfs4_fattr_bitmap_maxsz)
 217 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 218                                  encode_stateid_maxsz + 3)
 219 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2 + pagepad_maxsz)
 220 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 221                                  2 + encode_verifier_maxsz + 5 + \
 222                                 nfs4_label_maxsz)
 223 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 224                                  decode_verifier_maxsz + pagepad_maxsz)
 225 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 226 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
 227 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 228                                  encode_stateid_maxsz + 4)
 229 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 230                                  2 + decode_verifier_maxsz)
 231 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 232 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 233                                  decode_verifier_maxsz)
 234 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 235                                 nfs4_name_maxsz)
 236 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 237                                  decode_change_info_maxsz)
 238 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 239                                 2 * nfs4_name_maxsz)
 240 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 241                                  decode_change_info_maxsz + \
 242                                  decode_change_info_maxsz)
 243 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 244                                 nfs4_name_maxsz)
 245 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 246 #define encode_lockowner_maxsz  (7)
 247 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 248                                  7 + \
 249                                  1 + encode_stateid_maxsz + 1 + \
 250                                  encode_lockowner_maxsz)
 251 #define decode_lock_denied_maxsz \
 252                                 (8 + decode_lockowner_maxsz)
 253 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 254                                  decode_lock_denied_maxsz)
 255 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 256                                 encode_lockowner_maxsz)
 257 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 258                                  decode_lock_denied_maxsz)
 259 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 260                                  encode_stateid_maxsz + \
 261                                  4)
 262 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 263                                  decode_stateid_maxsz)
 264 #define encode_release_lockowner_maxsz \
 265                                 (op_encode_hdr_maxsz + \
 266                                  encode_lockowner_maxsz)
 267 #define decode_release_lockowner_maxsz \
 268                                 (op_decode_hdr_maxsz)
 269 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 270 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 271 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 272                                 1 + nfs4_name_maxsz + \
 273                                 1 + \
 274                                 nfs4_fattr_maxsz)
 275 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 276 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 277                                 1 + 2 + nfs4_name_maxsz + \
 278                                 encode_attrs_maxsz)
 279 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 280                                 decode_change_info_maxsz + \
 281                                 nfs4_fattr_bitmap_maxsz)
 282 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 283 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 284 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 285 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 286 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 287 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 288                                  nfs4_fattr_bitmap_maxsz + 1 + pagepad_maxsz)
 289 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 290                                  encode_stateid_maxsz + 3)
 291 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 292 #define encode_fs_locations_maxsz \
 293                                 (encode_getattr_maxsz)
 294 #define decode_fs_locations_maxsz \
 295                                 (pagepad_maxsz)
 296 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 297 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 298
 299 #if defined(CONFIG_NFS_V4_1)
 300 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 301 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 302                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 303
 304 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 305                                 encode_verifier_maxsz + \
 306                                 1 /* co_ownerid.len */ + \
 307                                 /* eia_clientowner */ \
 308                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 309                                 1 /* flags */ + \
 310                                 1 /* spa_how */ + \
 311                                 /* max is SP4_MACH_CRED (for now) */ + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 314                                 1 /* implementation id array of size 1 */ + \
 315                                 1 /* nii_domain */ + \
 316                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 317                                 1 /* nii_name */ + \
 318                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 319                                 3 /* nii_date */)
 320 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 321                                 2 /* eir_clientid */ + \
 322                                 1 /* eir_sequenceid */ + \
 323                                 1 /* eir_flags */ + \
 324                                 1 /* spr_how */ + \
 325                                   /* max is SP4_MACH_CRED (for now) */ + \
 326                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 327                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 328                                 2 /* eir_server_owner.so_minor_id */ + \
 329                                 /* eir_server_owner.so_major_id<> */ \
 330                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 331                                 /* eir_server_scope<> */ \
 332                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 333                                 1 /* eir_server_impl_id array length */ + \
 334                                 1 /* nii_domain */ + \
 335                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 336                                 1 /* nii_name */ + \
 337                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 338                                 3 /* nii_date */)
 339 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 340 #define decode_channel_attrs_maxsz  (6 + \
 341                                      1 /* ca_rdma_ird.len */ + \
 342                                      1 /* ca_rdma_ird */)
 343 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 344                                      2 /* csa_clientid */ + \
 345                                      1 /* csa_sequence */ + \
 346                                      1 /* csa_flags */ + \
 347                                      encode_channel_attrs_maxsz + \
 348                                      encode_channel_attrs_maxsz + \
 349                                      1 /* csa_cb_program */ + \
 350                                      1 /* csa_sec_parms.len (1) */ + \
 351                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 352                                      1 /* stamp */ + \
 353                                      1 /* machinename.len */ + \
 354                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 355                                      1 /* uid */ + \
 356                                      1 /* gid */ + \
 357                                      1 /* gids.len (0) */)
 358 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 359                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 360                                      1 /* csr_sequence */ + \
 361                                      1 /* csr_flags */ + \
 362                                      decode_channel_attrs_maxsz + \
 363                                      decode_channel_attrs_maxsz)
 364 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 365                                      /* bctsa_sessid */ \
 366                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 367                                      1 /* bctsa_dir */ + \
 368                                      1 /* bctsa_use_conn_in_rdma_mode */)
 369 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 370                                      /* bctsr_sessid */ \
 371                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 372                                      1 /* bctsr_dir */ + \
 373                                      1 /* bctsr_use_conn_in_rdma_mode */)
 374 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 375 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 376 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 377 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 378 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 379                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 380 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 381                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 382 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 383 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 384 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 385                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 386                                 1 /* layout type */ + \
 387                                 1 /* maxcount */ + \
 388                                 1 /* bitmap size */ + \
 389                                 1 /* notification bitmap length */ + \
 390                                 1 /* notification bitmap, word 0 */)
 391 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 392                                 1 /* layout type */ + \
 393                                 1 /* opaque devaddr4 length */ + \
 394                                   /* devaddr4 payload is read into page */ \
 395                                 1 /* notification bitmap length */ + \
 396                                 1 /* notification bitmap, word 0 */ + \
 397                                 pagepad_maxsz /* possible XDR padding */)
 398 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 399                                 encode_stateid_maxsz)
 400 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 401                                 decode_stateid_maxsz + \
 402                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + \
 403                                 pagepad_maxsz)
 404 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 405                                 2 /* offset */ + \
 406                                 2 /* length */ + \
 407                                 1 /* reclaim */ + \
 408                                 encode_stateid_maxsz + \
 409                                 1 /* new offset (true) */ + \
 410                                 2 /* last byte written */ + \
 411                                 1 /* nt_timechanged (false) */ + \
 412                                 1 /* layoutupdate4 layout type */ + \
 413                                 1 /* layoutupdate4 opaqueue len */)
 414                                   /* the actual content of layoutupdate4 should
 415                                      be allocated by drivers and spliced in
 416                                      using xdr_write_pages */
 417 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 418 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 419                                 encode_stateid_maxsz + \
 420                                 1 + \
 421                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 422 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 423                                 1 + decode_stateid_maxsz)
 424 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 425 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 426 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 427                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 428 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 429 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 430                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 431 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 432 #else /* CONFIG_NFS_V4_1 */
 433 #define encode_sequence_maxsz   0
 434 #define decode_sequence_maxsz   0
 435 #define encode_layoutreturn_maxsz 0
 436 #define decode_layoutreturn_maxsz 0
 437 #define encode_layoutget_maxsz  0
 438 #define decode_layoutget_maxsz  0
 439 #endif /* CONFIG_NFS_V4_1 */
 440
 441 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 442 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 443 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 444                                 encode_sequence_maxsz + \
 445                                 encode_putfh_maxsz + \
 446                                 encode_read_maxsz)
 447 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 448                                 decode_sequence_maxsz + \
 449                                 decode_putfh_maxsz + \
 450                                 decode_read_maxsz)
 451 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_readlink_maxsz)
 455 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 456                                 decode_sequence_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_readlink_maxsz)
 459 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_readdir_maxsz)
 463 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 464                                 decode_sequence_maxsz + \
 465                                 decode_putfh_maxsz + \
 466                                 decode_readdir_maxsz)
 467 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_write_maxsz + \
 471                                 encode_getattr_maxsz)
 472 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 473                                 decode_sequence_maxsz + \
 474                                 decode_putfh_maxsz + \
 475                                 decode_write_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 478                                 encode_sequence_maxsz + \
 479                                 encode_putfh_maxsz + \
 480                                 encode_commit_maxsz)
 481 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 482                                 decode_sequence_maxsz + \
 483                                 decode_putfh_maxsz + \
 484                                 decode_commit_maxsz)
 485 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 486                                 encode_sequence_maxsz + \
 487                                 encode_putfh_maxsz + \
 488                                 encode_open_maxsz + \
 489                                 encode_access_maxsz + \
 490                                 encode_getfh_maxsz + \
 491                                 encode_getattr_maxsz + \
 492                                 encode_layoutget_maxsz)
 493 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 494                                 decode_sequence_maxsz + \
 495                                 decode_putfh_maxsz + \
 496                                 decode_open_maxsz + \
 497                                 decode_access_maxsz + \
 498                                 decode_getfh_maxsz + \
 499                                 decode_getattr_maxsz + \
 500                                 decode_layoutget_maxsz)
 501 #define NFS4_enc_open_confirm_sz \
 502                                 (compound_encode_hdr_maxsz + \
 503                                  encode_putfh_maxsz + \
 504                                  encode_open_confirm_maxsz)
 505 #define NFS4_dec_open_confirm_sz \
 506                                 (compound_decode_hdr_maxsz + \
 507                                  decode_putfh_maxsz + \
 508                                  decode_open_confirm_maxsz)
 509 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 510                                         encode_sequence_maxsz + \
 511                                         encode_putfh_maxsz + \
 512                                         encode_open_maxsz + \
 513                                         encode_access_maxsz + \
 514                                         encode_getattr_maxsz + \
 515                                         encode_layoutget_maxsz)
 516 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 517                                         decode_sequence_maxsz + \
 518                                         decode_putfh_maxsz + \
 519                                         decode_open_maxsz + \
 520                                         decode_access_maxsz + \
 521                                         decode_getattr_maxsz + \
 522                                         decode_layoutget_maxsz)
 523 #define NFS4_enc_open_downgrade_sz \
 524                                 (compound_encode_hdr_maxsz + \
 525                                  encode_sequence_maxsz + \
 526                                  encode_putfh_maxsz + \
 527                                  encode_layoutreturn_maxsz + \
 528                                  encode_open_downgrade_maxsz)
 529 #define NFS4_dec_open_downgrade_sz \
 530                                 (compound_decode_hdr_maxsz + \
 531                                  decode_sequence_maxsz + \
 532                                  decode_putfh_maxsz + \
 533                                  decode_layoutreturn_maxsz + \
 534                                  decode_open_downgrade_maxsz)
 535 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 536                                  encode_sequence_maxsz + \
 537                                  encode_putfh_maxsz + \
 538                                  encode_layoutreturn_maxsz + \
 539                                  encode_close_maxsz + \
 540                                  encode_getattr_maxsz)
 541 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 542                                  decode_sequence_maxsz + \
 543                                  decode_putfh_maxsz + \
 544                                  decode_layoutreturn_maxsz + \
 545                                  decode_close_maxsz + \
 546                                  decode_getattr_maxsz)
 547 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 548                                  encode_sequence_maxsz + \
 549                                  encode_putfh_maxsz + \
 550                                  encode_setattr_maxsz + \
 551                                  encode_getattr_maxsz)
 552 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 553                                  decode_sequence_maxsz + \
 554                                  decode_putfh_maxsz + \
 555                                  decode_setattr_maxsz + \
 556                                  decode_getattr_maxsz)
 557 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_fsinfo_maxsz)
 561 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_fsinfo_maxsz)
 565 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 566                                 encode_renew_maxsz)
 567 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 568                                 decode_renew_maxsz)
 569 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 570                                 encode_setclientid_maxsz)
 571 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 572                                 decode_setclientid_maxsz)
 573 #define NFS4_enc_setclientid_confirm_sz \
 574                                 (compound_encode_hdr_maxsz + \
 575                                 encode_setclientid_confirm_maxsz)
 576 #define NFS4_dec_setclientid_confirm_sz \
 577                                 (compound_decode_hdr_maxsz + \
 578                                 decode_setclientid_confirm_maxsz)
 579 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 580                                 encode_sequence_maxsz + \
 581                                 encode_putfh_maxsz + \
 582                                 encode_lock_maxsz)
 583 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 584                                 decode_sequence_maxsz + \
 585                                 decode_putfh_maxsz + \
 586                                 decode_lock_maxsz)
 587 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 588                                 encode_sequence_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_lockt_maxsz)
 591 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 592                                  decode_sequence_maxsz + \
 593                                  decode_putfh_maxsz + \
 594                                  decode_lockt_maxsz)
 595 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 596                                 encode_sequence_maxsz + \
 597                                 encode_putfh_maxsz + \
 598                                 encode_locku_maxsz)
 599 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 600                                 decode_sequence_maxsz + \
 601                                 decode_putfh_maxsz + \
 602                                 decode_locku_maxsz)
 603 #define NFS4_enc_release_lockowner_sz \
 604                                 (compound_encode_hdr_maxsz + \
 605                                  encode_lockowner_maxsz)
 606 #define NFS4_dec_release_lockowner_sz \
 607                                 (compound_decode_hdr_maxsz + \
 608                                  decode_lockowner_maxsz)
 609 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 610                                 encode_sequence_maxsz + \
 611                                 encode_putfh_maxsz + \
 612                                 encode_access_maxsz + \
 613                                 encode_getattr_maxsz)
 614 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 615                                 decode_sequence_maxsz + \
 616                                 decode_putfh_maxsz + \
 617                                 decode_access_maxsz + \
 618                                 decode_getattr_maxsz)
 619 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 620                                 encode_sequence_maxsz + \
 621                                 encode_putfh_maxsz + \
 622                                 encode_getattr_maxsz + \
 623                                 encode_renew_maxsz)
 624 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_renew_maxsz)
 629 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_lookup_maxsz + \
 633                                 encode_getattr_maxsz + \
 634                                 encode_getfh_maxsz)
 635 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_lookup_maxsz + \
 639                                 decode_getattr_maxsz + \
 640                                 decode_getfh_maxsz)
 641 #define NFS4_enc_lookupp_sz     (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_lookupp_maxsz + \
 645                                 encode_getattr_maxsz + \
 646                                 encode_getfh_maxsz)
 647 #define NFS4_dec_lookupp_sz     (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_lookupp_maxsz + \
 651                                 decode_getattr_maxsz + \
 652                                 decode_getfh_maxsz)
 653 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 654                                 encode_sequence_maxsz + \
 655                                 encode_putrootfh_maxsz + \
 656                                 encode_getattr_maxsz + \
 657                                 encode_getfh_maxsz)
 658 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 659                                 decode_sequence_maxsz + \
 660                                 decode_putrootfh_maxsz + \
 661                                 decode_getattr_maxsz + \
 662                                 decode_getfh_maxsz)
 663 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 664                                 encode_sequence_maxsz + \
 665                                 encode_putfh_maxsz + \
 666                                 encode_remove_maxsz)
 667 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 668                                 decode_sequence_maxsz + \
 669                                 decode_putfh_maxsz + \
 670                                 decode_remove_maxsz)
 671 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_savefh_maxsz + \
 675                                 encode_putfh_maxsz + \
 676                                 encode_rename_maxsz)
 677 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 678                                 decode_sequence_maxsz + \
 679                                 decode_putfh_maxsz + \
 680                                 decode_savefh_maxsz + \
 681                                 decode_putfh_maxsz + \
 682                                 decode_rename_maxsz)
 683 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 684                                 encode_sequence_maxsz + \
 685                                 encode_putfh_maxsz + \
 686                                 encode_savefh_maxsz + \
 687                                 encode_putfh_maxsz + \
 688                                 encode_link_maxsz + \
 689                                 encode_restorefh_maxsz + \
 690                                 encode_getattr_maxsz)
 691 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 692                                 decode_sequence_maxsz + \
 693                                 decode_putfh_maxsz + \
 694                                 decode_savefh_maxsz + \
 695                                 decode_putfh_maxsz + \
 696                                 decode_link_maxsz + \
 697                                 decode_restorefh_maxsz + \
 698                                 decode_getattr_maxsz)
 699 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 700                                 encode_sequence_maxsz + \
 701                                 encode_putfh_maxsz + \
 702                                 encode_symlink_maxsz + \
 703                                 encode_getattr_maxsz + \
 704                                 encode_getfh_maxsz)
 705 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 706                                 decode_sequence_maxsz + \
 707                                 decode_putfh_maxsz + \
 708                                 decode_symlink_maxsz + \
 709                                 decode_getattr_maxsz + \
 710                                 decode_getfh_maxsz)
 711 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 712                                 encode_sequence_maxsz + \
 713                                 encode_putfh_maxsz + \
 714                                 encode_create_maxsz + \
 715                                 encode_getfh_maxsz + \
 716                                 encode_getattr_maxsz)
 717 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 718                                 decode_sequence_maxsz + \
 719                                 decode_putfh_maxsz + \
 720                                 decode_create_maxsz + \
 721                                 decode_getfh_maxsz + \
 722                                 decode_getattr_maxsz)
 723 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 724                                 encode_sequence_maxsz + \
 725                                 encode_putfh_maxsz + \
 726                                 encode_getattr_maxsz)
 727 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 728                                 decode_sequence_maxsz + \
 729                                 decode_putfh_maxsz + \
 730                                 decode_getattr_maxsz)
 731 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 732                                 encode_sequence_maxsz + \
 733                                 encode_putfh_maxsz + \
 734                                 encode_statfs_maxsz)
 735 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 736                                 decode_sequence_maxsz + \
 737                                 decode_putfh_maxsz + \
 738                                 decode_statfs_maxsz)
 739 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 740                                 encode_sequence_maxsz + \
 741                                 encode_putfh_maxsz + \
 742                                 encode_getattr_maxsz)
 743 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 744                                 decode_sequence_maxsz + \
 745                                 decode_putfh_maxsz + \
 746                                 decode_getattr_maxsz)
 747 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 748                                 encode_sequence_maxsz + \
 749                                 encode_putfh_maxsz + \
 750                                 encode_layoutreturn_maxsz + \
 751                                 encode_delegreturn_maxsz + \
 752                                 encode_getattr_maxsz)
 753 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 754                                 decode_sequence_maxsz + \
 755                                 decode_putfh_maxsz + \
 756                                 decode_layoutreturn_maxsz + \
 757                                 decode_delegreturn_maxsz + \
 758                                 decode_getattr_maxsz)
 759 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 760                                 encode_sequence_maxsz + \
 761                                 encode_putfh_maxsz + \
 762                                 encode_getacl_maxsz)
 763 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 764                                 decode_sequence_maxsz + \
 765                                 decode_putfh_maxsz + \
 766                                 decode_getacl_maxsz)
 767 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 768                                 encode_sequence_maxsz + \
 769                                 encode_putfh_maxsz + \
 770                                 encode_setacl_maxsz)
 771 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 772                                 decode_sequence_maxsz + \
 773                                 decode_putfh_maxsz + \
 774                                 decode_setacl_maxsz)
 775 #define NFS4_enc_fs_locations_sz \
 776                                 (compound_encode_hdr_maxsz + \
 777                                  encode_sequence_maxsz + \
 778                                  encode_putfh_maxsz + \
 779                                  encode_lookup_maxsz + \
 780                                  encode_fs_locations_maxsz + \
 781                                  encode_renew_maxsz)
 782 #define NFS4_dec_fs_locations_sz \
 783                                 (compound_decode_hdr_maxsz + \
 784                                  decode_sequence_maxsz + \
 785                                  decode_putfh_maxsz + \
 786                                  decode_lookup_maxsz + \
 787                                  decode_fs_locations_maxsz + \
 788                                  decode_renew_maxsz)
 789 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 790                                 encode_sequence_maxsz + \
 791                                 encode_putfh_maxsz + \
 792                                 encode_secinfo_maxsz)
 793 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 794                                 decode_sequence_maxsz + \
 795                                 decode_putfh_maxsz + \
 796                                 decode_secinfo_maxsz)
 797 #define NFS4_enc_fsid_present_sz \
 798                                 (compound_encode_hdr_maxsz + \
 799                                  encode_sequence_maxsz + \
 800                                  encode_putfh_maxsz + \
 801                                  encode_getfh_maxsz + \
 802                                  encode_renew_maxsz)
 803 #define NFS4_dec_fsid_present_sz \
 804                                 (compound_decode_hdr_maxsz + \
 805                                  decode_sequence_maxsz + \
 806                                  decode_putfh_maxsz + \
 807                                  decode_getfh_maxsz + \
 808                                  decode_renew_maxsz)
 809 #if defined(CONFIG_NFS_V4_1)
 810 #define NFS4_enc_bind_conn_to_session_sz \
 811                                 (compound_encode_hdr_maxsz + \
 812                                  encode_bind_conn_to_session_maxsz)
 813 #define NFS4_dec_bind_conn_to_session_sz \
 814                                 (compound_decode_hdr_maxsz + \
 815                                  decode_bind_conn_to_session_maxsz)
 816 #define NFS4_enc_exchange_id_sz \
 817                                 (compound_encode_hdr_maxsz + \
 818                                  encode_exchange_id_maxsz)
 819 #define NFS4_dec_exchange_id_sz \
 820                                 (compound_decode_hdr_maxsz + \
 821                                  decode_exchange_id_maxsz)
 822 #define NFS4_enc_create_session_sz \
 823                                 (compound_encode_hdr_maxsz + \
 824                                  encode_create_session_maxsz)
 825 #define NFS4_dec_create_session_sz \
 826                                 (compound_decode_hdr_maxsz + \
 827                                  decode_create_session_maxsz)
 828 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 829                                          encode_destroy_session_maxsz)
 830 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 831                                          decode_destroy_session_maxsz)
 832 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 833                                          encode_destroy_clientid_maxsz)
 834 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 835                                          decode_destroy_clientid_maxsz)
 836 #define NFS4_enc_sequence_sz \
 837                                 (compound_decode_hdr_maxsz + \
 838                                  encode_sequence_maxsz)
 839 #define NFS4_dec_sequence_sz \
 840                                 (compound_decode_hdr_maxsz + \
 841                                  decode_sequence_maxsz)
 842 #endif
 843 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 844                                          encode_sequence_maxsz + \
 845                                          encode_putrootfh_maxsz + \
 846                                          encode_fsinfo_maxsz)
 847 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 848                                          decode_sequence_maxsz + \
 849                                          decode_putrootfh_maxsz + \
 850                                          decode_fsinfo_maxsz)
 851 #if defined(CONFIG_NFS_V4_1)
 852 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 853                                          encode_sequence_maxsz + \
 854                                          encode_reclaim_complete_maxsz)
 855 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 856                                          decode_sequence_maxsz + \
 857                                          decode_reclaim_complete_maxsz)
 858 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 859                                 encode_sequence_maxsz +\
 860                                 encode_getdeviceinfo_maxsz)
 861 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 862                                 decode_sequence_maxsz + \
 863                                 decode_getdeviceinfo_maxsz)
 864 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 865                                 encode_sequence_maxsz + \
 866                                 encode_putfh_maxsz +        \
 867                                 encode_layoutget_maxsz)
 868 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 869                                 decode_sequence_maxsz + \
 870                                 decode_putfh_maxsz +        \
 871                                 decode_layoutget_maxsz)
 872 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 873                                 encode_sequence_maxsz +\
 874                                 encode_putfh_maxsz + \
 875                                 encode_layoutcommit_maxsz + \
 876                                 encode_getattr_maxsz)
 877 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 878                                 decode_sequence_maxsz + \
 879                                 decode_putfh_maxsz + \
 880                                 decode_layoutcommit_maxsz + \
 881                                 decode_getattr_maxsz)
 882 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 883                                 encode_sequence_maxsz + \
 884                                 encode_putfh_maxsz + \
 885                                 encode_layoutreturn_maxsz)
 886 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 887                                 decode_sequence_maxsz + \
 888                                 decode_putfh_maxsz + \
 889                                 decode_layoutreturn_maxsz)
 890 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 891                                         encode_sequence_maxsz + \
 892                                         encode_putrootfh_maxsz +\
 893                                         encode_secinfo_no_name_maxsz)
 894 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 895                                         decode_sequence_maxsz + \
 896                                         decode_putrootfh_maxsz + \
 897                                         decode_secinfo_no_name_maxsz)
 898 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 899                                          encode_sequence_maxsz + \
 900                                          encode_test_stateid_maxsz)
 901 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 902                                          decode_sequence_maxsz + \
 903                                          decode_test_stateid_maxsz)
 904 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 905                                          encode_sequence_maxsz + \
 906                                          encode_free_stateid_maxsz)
 907 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 908                                          decode_sequence_maxsz + \
 909                                          decode_free_stateid_maxsz)
 910
 911 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 912                                       compound_encode_hdr_maxsz +
 913                                       encode_sequence_maxsz +
 914                                       encode_putfh_maxsz +
 915                                       encode_getattr_maxsz) *
 916                                      XDR_UNIT);
 917
 918 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 919                                      compound_decode_hdr_maxsz +
 920                                      decode_sequence_maxsz +
 921                                      decode_putfh_maxsz) *
 922                                     XDR_UNIT);
 923
 924 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 925                                            compound_decode_hdr_maxsz +
 926                                            decode_sequence_maxsz) *
 927                                           XDR_UNIT);
 928 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 929 #endif /* CONFIG_NFS_V4_1 */
 930
 931 static const umode_t nfs_type2fmt[] = {
 932         [NF4BAD] = 0,
 933         [NF4REG] = S_IFREG,
 934         [NF4DIR] = S_IFDIR,
 935         [NF4BLK] = S_IFBLK,
 936         [NF4CHR] = S_IFCHR,
 937         [NF4LNK] = S_IFLNK,
 938         [NF4SOCK] = S_IFSOCK,
 939         [NF4FIFO] = S_IFIFO,
 940         [NF4ATTRDIR] = 0,
 941         [NF4NAMEDATTR] = 0,
 942 };
 943
 944 struct compound_hdr {
 945         int32_t         status;
 946         uint32_t        nops;
 947         __be32 *        nops_p;
 948         uint32_t        taglen;
 949         char *          tag;
 950         uint32_t        replen;         /* expected reply words */
 951         u32             minorversion;
 952 };
 953
 954 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 955 {
 956         __be32 *p = xdr_reserve_space(xdr, nbytes);
 957         BUG_ON(!p);
 958         return p;
 959 }
 960
 961 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 962 {
 963         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 964 }
 965
 966 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 967 {
 968         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 969 }
 970
 971 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 972 {
 973         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 974 }
 975
 976 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 977 {
 978         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 979 }
 980
 981 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
 982                 const __u32 *bitmap, size_t len)
 983 {
 984         ssize_t ret;
 985
 986         /* Trim empty words */
 987         while (len > 0 && bitmap[len-1] == 0)
 988                 len--;
 989         ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
 990         if (WARN_ON_ONCE(ret < 0))
 991                 return ret;
 992         return len;
 993 }
 994
 995 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
 996                 __u32 *res, size_t len)
 997 {
 998         size_t i;
 999         __u32 tmp;
1000
1001         while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1002                 len--;
1003         for (i = len; i-- > 0;) {
1004                 tmp = bitmap[i] & mask[i];
1005                 res[i] = tmp;
1006         }
1007         return len;
1008 }
1009
1010 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1011                 const struct nfs_seqid *seqid)
1012 {
1013         if (seqid != NULL)
1014                 encode_uint32(xdr, seqid->sequence->counter);
1015         else
1016                 encode_uint32(xdr, 0);
1017 }
1018
1019 static void encode_compound_hdr(struct xdr_stream *xdr,
1020                                 struct rpc_rqst *req,
1021                                 struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         /* initialize running count of expected bytes in reply.
1026          * NOTE: the replied tag SHOULD be the same is the one sent,
1027          * but this is not required as a MUST for the server to do so. */
1028         hdr->replen = 3 + hdr->taglen;
1029
1030         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1031         encode_string(xdr, hdr->taglen, hdr->tag);
1032         p = reserve_space(xdr, 8);
1033         *p++ = cpu_to_be32(hdr->minorversion);
1034         hdr->nops_p = p;
1035         *p = cpu_to_be32(hdr->nops);
1036 }
1037
1038 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1039                 uint32_t replen,
1040                 struct compound_hdr *hdr)
1041 {
1042         encode_uint32(xdr, op);
1043         hdr->nops++;
1044         hdr->replen += replen;
1045 }
1046
1047 static void encode_nops(struct compound_hdr *hdr)
1048 {
1049         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1050         *hdr->nops_p = htonl(hdr->nops);
1051 }
1052
1053 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1054 {
1055         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1056 }
1057
1058 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1059 {
1060         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1061 }
1062
1063 static __be32 *
1064 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1065 {
1066         p = xdr_encode_hyper(p, t->tv_sec);
1067         *p++ = cpu_to_be32(t->tv_nsec);
1068         return p;
1069 }
1070
1071 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1072                                 const struct nfs4_label *label,
1073                                 const umode_t *umask,
1074                                 const struct nfs_server *server,
1075                                 const uint32_t attrmask[])
1076 {
1077         char owner_name[IDMAP_NAMESZ];
1078         char owner_group[IDMAP_NAMESZ];
1079         int owner_namelen = 0;
1080         int owner_grouplen = 0;
1081         __be32 *p;
1082         uint32_t len = 0;
1083         uint32_t bmval[3] = { 0 };
1084
1085         /*
1086          * We reserve enough space to write the entire attribute buffer at once.
1087          */
1088         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1089                 bmval[0] |= FATTR4_WORD0_SIZE;
1090                 len += 8;
1091         }
1092         if (iap->ia_valid & ATTR_MODE) {
1093                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1094                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1095                         len += 8;
1096                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1097                         bmval[1] |= FATTR4_WORD1_MODE;
1098                         len += 4;
1099                 }
1100         }
1101         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1102                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1103                 if (owner_namelen < 0) {
1104                         dprintk("nfs: couldn't resolve uid %d to string\n",
1105                                         from_kuid(&init_user_ns, iap->ia_uid));
1106                         /* XXX */
1107                         strcpy(owner_name, "nobody");
1108                         owner_namelen = sizeof("nobody") - 1;
1109                         /* goto out; */
1110                 }
1111                 bmval[1] |= FATTR4_WORD1_OWNER;
1112                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1113         }
1114         if ((iap->ia_valid & ATTR_GID) &&
1115            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1116                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1117                 if (owner_grouplen < 0) {
1118                         dprintk("nfs: couldn't resolve gid %d to string\n",
1119                                         from_kgid(&init_user_ns, iap->ia_gid));
1120                         strcpy(owner_group, "nobody");
1121                         owner_grouplen = sizeof("nobody") - 1;
1122                         /* goto out; */
1123                 }
1124                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1125                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1126         }
1127         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1128                 if (iap->ia_valid & ATTR_ATIME_SET) {
1129                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1130                         len += 4 + (nfstime4_maxsz << 2);
1131                 } else if (iap->ia_valid & ATTR_ATIME) {
1132                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1133                         len += 4;
1134                 }
1135         }
1136         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1137                 if (iap->ia_valid & ATTR_MTIME_SET) {
1138                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1139                         len += 4 + (nfstime4_maxsz << 2);
1140                 } else if (iap->ia_valid & ATTR_MTIME) {
1141                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1142                         len += 4;
1143                 }
1144         }
1145
1146         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1147                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1148                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1149         }
1150
1151         xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1152         xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1153
1154         if (bmval[0] & FATTR4_WORD0_SIZE)
1155                 p = xdr_encode_hyper(p, iap->ia_size);
1156         if (bmval[1] & FATTR4_WORD1_MODE)
1157                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1158         if (bmval[1] & FATTR4_WORD1_OWNER)
1159                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1160         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1161                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1162         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1163                 if (iap->ia_valid & ATTR_ATIME_SET) {
1164                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1165                         p = xdr_encode_nfstime4(p, &iap->ia_atime);
1166                 } else
1167                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168         }
1169         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170                 if (iap->ia_valid & ATTR_MTIME_SET) {
1171                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172                         p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1173                 } else
1174                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1175         }
1176         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1177                 *p++ = cpu_to_be32(label->lfs);
1178                 *p++ = cpu_to_be32(label->pi);
1179                 *p++ = cpu_to_be32(label->len);
1180                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1181         }
1182         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1183                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1184                 *p++ = cpu_to_be32(*umask);
1185         }
1186
1187 /* out: */
1188 }
1189
1190 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1191 {
1192         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1193         encode_uint32(xdr, access);
1194 }
1195
1196 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1197 {
1198         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1199         encode_nfs4_seqid(xdr, arg->seqid);
1200         encode_nfs4_stateid(xdr, &arg->stateid);
1201 }
1202
1203 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1204 {
1205         __be32 *p;
1206
1207         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1208         p = reserve_space(xdr, 12);
1209         p = xdr_encode_hyper(p, args->offset);
1210         *p = cpu_to_be32(args->count);
1211 }
1212
1213 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1218         encode_uint32(xdr, create->ftype);
1219
1220         switch (create->ftype) {
1221         case NF4LNK:
1222                 p = reserve_space(xdr, 4);
1223                 *p = cpu_to_be32(create->u.symlink.len);
1224                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1225                                 create->u.symlink.len);
1226                 xdr->buf->flags |= XDRBUF_WRITE;
1227                 break;
1228
1229         case NF4BLK: case NF4CHR:
1230                 p = reserve_space(xdr, 8);
1231                 *p++ = cpu_to_be32(create->u.device.specdata1);
1232                 *p = cpu_to_be32(create->u.device.specdata2);
1233                 break;
1234
1235         default:
1236                 break;
1237         }
1238
1239         encode_string(xdr, create->name->len, create->name->name);
1240         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1241                         create->server, create->server->attr_bitmask);
1242 }
1243
1244 static void encode_getattr(struct xdr_stream *xdr,
1245                 const __u32 *bitmap, const __u32 *mask, size_t len,
1246                 struct compound_hdr *hdr)
1247 {
1248         __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1249
1250         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1251         if (mask) {
1252                 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1253                         len = ARRAY_SIZE(masked_bitmap);
1254                 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1255                 bitmap = masked_bitmap;
1256         }
1257         xdr_encode_bitmap4(xdr, bitmap, len);
1258 }
1259
1260 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1261 {
1262         encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1263                         ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1264 }
1265
1266 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1267                                  const u32 *open_bitmap,
1268                                  struct compound_hdr *hdr)
1269 {
1270         encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1271 }
1272
1273 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1274 {
1275         encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1276                         ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1277 }
1278
1279 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1280 {
1281         encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1282                         ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1283 }
1284
1285 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1286 {
1287         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1288 }
1289
1290 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1291 {
1292         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1293         encode_string(xdr, name->len, name->name);
1294 }
1295
1296 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1297 {
1298         if (fl->fl_type == F_RDLCK)
1299                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1300         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1301 }
1302
1303 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1304 {
1305         if (fl->fl_end == OFFSET_MAX)
1306                 return ~(uint64_t)0;
1307         return fl->fl_end - fl->fl_start + 1;
1308 }
1309
1310 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1311 {
1312         __be32 *p;
1313
1314         p = reserve_space(xdr, 32);
1315         p = xdr_encode_hyper(p, lowner->clientid);
1316         *p++ = cpu_to_be32(20);
1317         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1318         *p++ = cpu_to_be32(lowner->s_dev);
1319         xdr_encode_hyper(p, lowner->id);
1320 }
1321
1322 /*
1323  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1324  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1325  */
1326 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1327 {
1328         __be32 *p;
1329
1330         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1331         p = reserve_space(xdr, 28);
1332         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1333         *p++ = cpu_to_be32(args->reclaim);
1334         p = xdr_encode_hyper(p, args->fl->fl_start);
1335         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1336         *p = cpu_to_be32(args->new_lock_owner);
1337         if (args->new_lock_owner){
1338                 encode_nfs4_seqid(xdr, args->open_seqid);
1339                 encode_nfs4_stateid(xdr, &args->open_stateid);
1340                 encode_nfs4_seqid(xdr, args->lock_seqid);
1341                 encode_lockowner(xdr, &args->lock_owner);
1342         }
1343         else {
1344                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1345                 encode_nfs4_seqid(xdr, args->lock_seqid);
1346         }
1347 }
1348
1349 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1350 {
1351         __be32 *p;
1352
1353         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1354         p = reserve_space(xdr, 20);
1355         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1356         p = xdr_encode_hyper(p, args->fl->fl_start);
1357         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1358         encode_lockowner(xdr, &args->lock_owner);
1359 }
1360
1361 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1362 {
1363         __be32 *p;
1364
1365         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1366         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1367         encode_nfs4_seqid(xdr, args->seqid);
1368         encode_nfs4_stateid(xdr, &args->stateid);
1369         p = reserve_space(xdr, 16);
1370         p = xdr_encode_hyper(p, args->fl->fl_start);
1371         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1372 }
1373
1374 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1375 {
1376         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1377         encode_lockowner(xdr, lowner);
1378 }
1379
1380 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1381 {
1382         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1383         encode_string(xdr, name->len, name->name);
1384 }
1385
1386 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1387 {
1388         encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1389 }
1390
1391 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1392 {
1393         __be32 *p;
1394
1395         p = reserve_space(xdr, 8);
1396         *p++ = cpu_to_be32(share_access);
1397         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1398 }
1399
1400 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1401 {
1402         __be32 *p;
1403  /*
1404  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1405  * owner 4 = 32
1406  */
1407         encode_nfs4_seqid(xdr, arg->seqid);
1408         encode_share_access(xdr, arg->share_access);
1409         p = reserve_space(xdr, 36);
1410         p = xdr_encode_hyper(p, arg->clientid);
1411         *p++ = cpu_to_be32(24);
1412         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1413         *p++ = cpu_to_be32(arg->server->s_dev);
1414         *p++ = cpu_to_be32(arg->id.uniquifier);
1415         xdr_encode_hyper(p, arg->id.create_time);
1416 }
1417
1418 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1419 {
1420         __be32 *p;
1421
1422         p = reserve_space(xdr, 4);
1423         switch(arg->createmode) {
1424         case NFS4_CREATE_UNCHECKED:
1425                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1426                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1427                                 arg->server, arg->server->attr_bitmask);
1428                 break;
1429         case NFS4_CREATE_GUARDED:
1430                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1431                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1432                                 arg->server, arg->server->attr_bitmask);
1433                 break;
1434         case NFS4_CREATE_EXCLUSIVE:
1435                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1436                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437                 break;
1438         case NFS4_CREATE_EXCLUSIVE4_1:
1439                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1440                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1441                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1442                                 arg->server, arg->server->exclcreat_bitmask);
1443         }
1444 }
1445
1446 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1447 {
1448         __be32 *p;
1449
1450         p = reserve_space(xdr, 4);
1451         switch (arg->open_flags & O_CREAT) {
1452         case 0:
1453                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1454                 break;
1455         default:
1456                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1457                 encode_createmode(xdr, arg);
1458         }
1459 }
1460
1461 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1462 {
1463         __be32 *p;
1464
1465         p = reserve_space(xdr, 4);
1466         switch (delegation_type) {
1467         case 0:
1468                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1469                 break;
1470         case FMODE_READ:
1471                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1472                 break;
1473         case FMODE_WRITE|FMODE_READ:
1474                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1475                 break;
1476         default:
1477                 BUG();
1478         }
1479 }
1480
1481 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4);
1486         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1487         encode_string(xdr, name->len, name->name);
1488 }
1489
1490 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1491 {
1492         __be32 *p;
1493
1494         p = reserve_space(xdr, 4);
1495         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1496         encode_delegation_type(xdr, type);
1497 }
1498
1499 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1500 {
1501         __be32 *p;
1502
1503         p = reserve_space(xdr, 4);
1504         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1505         encode_nfs4_stateid(xdr, stateid);
1506         encode_string(xdr, name->len, name->name);
1507 }
1508
1509 static inline void encode_claim_fh(struct xdr_stream *xdr)
1510 {
1511         __be32 *p;
1512
1513         p = reserve_space(xdr, 4);
1514         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1515 }
1516
1517 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4);
1522         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1523         encode_nfs4_stateid(xdr, stateid);
1524 }
1525
1526 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1527 {
1528         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1529         encode_openhdr(xdr, arg);
1530         encode_opentype(xdr, arg);
1531         switch (arg->claim) {
1532         case NFS4_OPEN_CLAIM_NULL:
1533                 encode_claim_null(xdr, arg->name);
1534                 break;
1535         case NFS4_OPEN_CLAIM_PREVIOUS:
1536                 encode_claim_previous(xdr, arg->u.delegation_type);
1537                 break;
1538         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1539                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1540                 break;
1541         case NFS4_OPEN_CLAIM_FH:
1542                 encode_claim_fh(xdr);
1543                 break;
1544         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1545                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1546                 break;
1547         default:
1548                 BUG();
1549         }
1550 }
1551
1552 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1553 {
1554         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1555         encode_nfs4_stateid(xdr, arg->stateid);
1556         encode_nfs4_seqid(xdr, arg->seqid);
1557 }
1558
1559 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1560 {
1561         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1562         encode_nfs4_stateid(xdr, &arg->stateid);
1563         encode_nfs4_seqid(xdr, arg->seqid);
1564         encode_share_access(xdr, arg->share_access);
1565 }
1566
1567 static void
1568 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1569 {
1570         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1571         encode_string(xdr, fh->size, fh->data);
1572 }
1573
1574 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1575 {
1576         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1577 }
1578
1579 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1580                         struct compound_hdr *hdr)
1581 {
1582         __be32 *p;
1583
1584         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1585         encode_nfs4_stateid(xdr, &args->stateid);
1586
1587         p = reserve_space(xdr, 12);
1588         p = xdr_encode_hyper(p, args->offset);
1589         *p = cpu_to_be32(args->count);
1590 }
1591
1592 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1593 {
1594         uint32_t attrs[3] = {
1595                 FATTR4_WORD0_RDATTR_ERROR,
1596                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1597         };
1598         uint32_t dircount = readdir->count >> 1;
1599         __be32 *p, verf[2];
1600         uint32_t attrlen = 0;
1601         unsigned int i;
1602
1603         if (readdir->plus) {
1604                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1605                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1606                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1607                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1608                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1609                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1610                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1611                 dircount >>= 1;
1612         }
1613         /* Use mounted_on_fileid only if the server supports it */
1614         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1615                 attrs[0] |= FATTR4_WORD0_FILEID;
1616         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1617                 attrs[i] &= readdir->bitmask[i];
1618                 if (attrs[i] != 0)
1619                         attrlen = i+1;
1620         }
1621
1622         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1623         encode_uint64(xdr, readdir->cookie);
1624         encode_nfs4_verifier(xdr, &readdir->verifier);
1625         p = reserve_space(xdr, 12 + (attrlen << 2));
1626         *p++ = cpu_to_be32(dircount);
1627         *p++ = cpu_to_be32(readdir->count);
1628         *p++ = cpu_to_be32(attrlen);
1629         for (i = 0; i < attrlen; i++)
1630                 *p++ = cpu_to_be32(attrs[i]);
1631         memcpy(verf, readdir->verifier.data, sizeof(verf));
1632
1633         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1634                         __func__,
1635                         (unsigned long long)readdir->cookie,
1636                         verf[0], verf[1],
1637                         attrs[0] & readdir->bitmask[0],
1638                         attrs[1] & readdir->bitmask[1],
1639                         attrs[2] & readdir->bitmask[2]);
1640 }
1641
1642 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1643 {
1644         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1645 }
1646
1647 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1648 {
1649         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1650         encode_string(xdr, name->len, name->name);
1651 }
1652
1653 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1654 {
1655         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1656         encode_string(xdr, oldname->len, oldname->name);
1657         encode_string(xdr, newname->len, newname->name);
1658 }
1659
1660 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1661                          struct compound_hdr *hdr)
1662 {
1663         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1664         encode_uint64(xdr, clid);
1665 }
1666
1667 static void
1668 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1669 {
1670         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1671 }
1672
1673 static void
1674 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1675                 struct compound_hdr *hdr)
1676 {
1677         __be32 *p;
1678
1679         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1680         encode_nfs4_stateid(xdr, &zero_stateid);
1681         p = reserve_space(xdr, 2*4);
1682         *p++ = cpu_to_be32(1);
1683         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1684         p = reserve_space(xdr, 4);
1685         *p = cpu_to_be32(arg->acl_len);
1686         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1687 }
1688
1689 static void
1690 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1691 {
1692         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1693 }
1694
1695 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1696 {
1697         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1698         encode_nfs4_stateid(xdr, &arg->stateid);
1699         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1700                         server->attr_bitmask);
1701 }
1702
1703 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1704 {
1705         __be32 *p;
1706
1707         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1708         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1709
1710         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1711                         setclientid->sc_clnt->cl_owner_id);
1712         p = reserve_space(xdr, 4);
1713         *p = cpu_to_be32(setclientid->sc_prog);
1714         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1715         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1716         p = reserve_space(xdr, 4);
1717         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1718 }
1719
1720 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1721 {
1722         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1723                         decode_setclientid_confirm_maxsz, hdr);
1724         encode_uint64(xdr, arg->clientid);
1725         encode_nfs4_verifier(xdr, &arg->confirm);
1726 }
1727
1728 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1729                          struct compound_hdr *hdr)
1730 {
1731         __be32 *p;
1732
1733         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1734         encode_nfs4_stateid(xdr, &args->stateid);
1735
1736         p = reserve_space(xdr, 16);
1737         p = xdr_encode_hyper(p, args->offset);
1738         *p++ = cpu_to_be32(args->stable);
1739         *p = cpu_to_be32(args->count);
1740
1741         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1742 }
1743
1744 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1745 {
1746         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1747         encode_nfs4_stateid(xdr, stateid);
1748 }
1749
1750 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1751 {
1752         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1753         encode_string(xdr, name->len, name->name);
1754 }
1755
1756 #if defined(CONFIG_NFS_V4_1)
1757 /* NFSv4.1 operations */
1758 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1759                                    const struct nfs41_bind_conn_to_session_args *args,
1760                                    struct compound_hdr *hdr)
1761 {
1762         __be32 *p;
1763
1764         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1765                 decode_bind_conn_to_session_maxsz, hdr);
1766         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1767         p = xdr_reserve_space(xdr, 8);
1768         *p++ = cpu_to_be32(args->dir);
1769         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1770 }
1771
1772 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1773 {
1774         unsigned int i;
1775         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1776         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1777                 encode_uint32(xdr, op_map->u.words[i]);
1778 }
1779
1780 static void encode_exchange_id(struct xdr_stream *xdr,
1781                                const struct nfs41_exchange_id_args *args,
1782                                struct compound_hdr *hdr)
1783 {
1784         __be32 *p;
1785         char impl_name[IMPL_NAME_LIMIT];
1786         int len = 0;
1787
1788         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1789         encode_nfs4_verifier(xdr, &args->verifier);
1790
1791         encode_string(xdr, strlen(args->client->cl_owner_id),
1792                         args->client->cl_owner_id);
1793
1794         encode_uint32(xdr, args->flags);
1795         encode_uint32(xdr, args->state_protect.how);
1796
1797         switch (args->state_protect.how) {
1798         case SP4_NONE:
1799                 break;
1800         case SP4_MACH_CRED:
1801                 encode_op_map(xdr, &args->state_protect.enforce);
1802                 encode_op_map(xdr, &args->state_protect.allow);
1803                 break;
1804         default:
1805                 WARN_ON_ONCE(1);
1806                 break;
1807         }
1808
1809         if (send_implementation_id &&
1810             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1811             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1812                 <= sizeof(impl_name) + 1)
1813                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1814                                utsname()->sysname, utsname()->release,
1815                                utsname()->version, utsname()->machine);
1816
1817         if (len > 0) {
1818                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1819
1820                 encode_string(xdr,
1821                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1822                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1823                 encode_string(xdr, len, impl_name);
1824                 /* just send zeros for nii_date - the date is in nii_name */
1825                 p = reserve_space(xdr, 12);
1826                 p = xdr_encode_hyper(p, 0);
1827                 *p = cpu_to_be32(0);
1828         } else
1829                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1830 }
1831
1832 static void encode_create_session(struct xdr_stream *xdr,
1833                                   const struct nfs41_create_session_args *args,
1834                                   struct compound_hdr *hdr)
1835 {
1836         __be32 *p;
1837         struct nfs_client *clp = args->client;
1838         struct rpc_clnt *clnt = clp->cl_rpcclient;
1839         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1840         u32 max_resp_sz_cached;
1841
1842         /*
1843          * Assumes OPEN is the biggest non-idempotent compound.
1844          * 2 is the verifier.
1845          */
1846         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1847                                 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1848
1849         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1850         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1851         p = xdr_encode_hyper(p, args->clientid);
1852         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1853         *p++ = cpu_to_be32(args->flags);                        /*flags */
1854
1855         /* Fore Channel */
1856         *p++ = cpu_to_be32(0);                          /* header padding size */
1857         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1858         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1859         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1860         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1861         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1862         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1863
1864         /* Back Channel */
1865         *p++ = cpu_to_be32(0);                          /* header padding size */
1866         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1867         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1868         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1869         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1870         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1871         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1872
1873         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1874         *p++ = cpu_to_be32(1);
1875         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1876
1877         /* authsys_parms rfc1831 */
1878         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1879         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1880         *p++ = cpu_to_be32(0);                          /* UID */
1881         *p++ = cpu_to_be32(0);                          /* GID */
1882         *p = cpu_to_be32(0);                            /* No more gids */
1883 }
1884
1885 static void encode_destroy_session(struct xdr_stream *xdr,
1886                                    const struct nfs4_session *session,
1887                                    struct compound_hdr *hdr)
1888 {
1889         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1890         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1891 }
1892
1893 static void encode_destroy_clientid(struct xdr_stream *xdr,
1894                                    uint64_t clientid,
1895                                    struct compound_hdr *hdr)
1896 {
1897         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1898         encode_uint64(xdr, clientid);
1899 }
1900
1901 static void encode_reclaim_complete(struct xdr_stream *xdr,
1902                                     const struct nfs41_reclaim_complete_args *args,
1903                                     struct compound_hdr *hdr)
1904 {
1905         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1906         encode_uint32(xdr, args->one_fs);
1907 }
1908 #endif /* CONFIG_NFS_V4_1 */
1909
1910 static void encode_sequence(struct xdr_stream *xdr,
1911                             const struct nfs4_sequence_args *args,
1912                             struct compound_hdr *hdr)
1913 {
1914 #if defined(CONFIG_NFS_V4_1)
1915         struct nfs4_session *session;
1916         struct nfs4_slot_table *tp;
1917         struct nfs4_slot *slot = args->sa_slot;
1918         __be32 *p;
1919
1920         tp = slot->table;
1921         session = tp->session;
1922         if (!session)
1923                 return;
1924
1925         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1926
1927         /*
1928          * Sessionid + seqid + slotid + max slotid + cache_this
1929          */
1930         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1931                 "max_slotid=%d cache_this=%d\n",
1932                 __func__,
1933                 ((u32 *)session->sess_id.data)[0],
1934                 ((u32 *)session->sess_id.data)[1],
1935                 ((u32 *)session->sess_id.data)[2],
1936                 ((u32 *)session->sess_id.data)[3],
1937                 slot->seq_nr, slot->slot_nr,
1938                 tp->highest_used_slotid, args->sa_cache_this);
1939         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1940         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1941         *p++ = cpu_to_be32(slot->seq_nr);
1942         *p++ = cpu_to_be32(slot->slot_nr);
1943         *p++ = cpu_to_be32(tp->highest_used_slotid);
1944         *p = cpu_to_be32(args->sa_cache_this);
1945 #endif /* CONFIG_NFS_V4_1 */
1946 }
1947
1948 #ifdef CONFIG_NFS_V4_1
1949 static void
1950 encode_getdeviceinfo(struct xdr_stream *xdr,
1951                      const struct nfs4_getdeviceinfo_args *args,
1952                      struct compound_hdr *hdr)
1953 {
1954         __be32 *p;
1955
1956         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1957         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1958         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1959                                     NFS4_DEVICEID4_SIZE);
1960         *p++ = cpu_to_be32(args->pdev->layout_type);
1961         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1962
1963         p = reserve_space(xdr, 4 + 4);
1964         *p++ = cpu_to_be32(1);                  /* bitmap length */
1965         *p++ = cpu_to_be32(args->notify_types);
1966 }
1967
1968 static void
1969 encode_layoutget(struct xdr_stream *xdr,
1970                       const struct nfs4_layoutget_args *args,
1971                       struct compound_hdr *hdr)
1972 {
1973         __be32 *p;
1974
1975         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1976         p = reserve_space(xdr, 36);
1977         *p++ = cpu_to_be32(0);     /* Signal layout available */
1978         *p++ = cpu_to_be32(args->type);
1979         *p++ = cpu_to_be32(args->range.iomode);
1980         p = xdr_encode_hyper(p, args->range.offset);
1981         p = xdr_encode_hyper(p, args->range.length);
1982         p = xdr_encode_hyper(p, args->minlength);
1983         encode_nfs4_stateid(xdr, &args->stateid);
1984         encode_uint32(xdr, args->maxcount);
1985
1986         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1987                 __func__,
1988                 args->type,
1989                 args->range.iomode,
1990                 (unsigned long)args->range.offset,
1991                 (unsigned long)args->range.length,
1992                 args->maxcount);
1993 }
1994
1995 static int
1996 encode_layoutcommit(struct xdr_stream *xdr,
1997                     struct inode *inode,
1998                     const struct nfs4_layoutcommit_args *args,
1999                     struct compound_hdr *hdr)
2000 {
2001         __be32 *p;
2002
2003         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2004                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2005
2006         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2007         p = reserve_space(xdr, 20);
2008         /* Only whole file layouts */
2009         p = xdr_encode_hyper(p, 0); /* offset */
2010         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2011         *p = cpu_to_be32(0); /* reclaim */
2012         encode_nfs4_stateid(xdr, &args->stateid);
2013         if (args->lastbytewritten != U64_MAX) {
2014                 p = reserve_space(xdr, 20);
2015                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2016                 p = xdr_encode_hyper(p, args->lastbytewritten);
2017         } else {
2018                 p = reserve_space(xdr, 12);
2019                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2020         }
2021         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2022         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2023
2024         encode_uint32(xdr, args->layoutupdate_len);
2025         if (args->layoutupdate_pages)
2026                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2027                                 args->layoutupdate_len);
2028
2029         return 0;
2030 }
2031
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034                     const struct nfs4_layoutreturn_args *args,
2035                     struct compound_hdr *hdr)
2036 {
2037         __be32 *p;
2038
2039         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2040         p = reserve_space(xdr, 16);
2041         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2042         *p++ = cpu_to_be32(args->layout_type);
2043         *p++ = cpu_to_be32(args->range.iomode);
2044         *p = cpu_to_be32(RETURN_FILE);
2045         p = reserve_space(xdr, 16);
2046         p = xdr_encode_hyper(p, args->range.offset);
2047         p = xdr_encode_hyper(p, args->range.length);
2048         spin_lock(&args->inode->i_lock);
2049         encode_nfs4_stateid(xdr, &args->stateid);
2050         spin_unlock(&args->inode->i_lock);
2051         if (args->ld_private->ops && args->ld_private->ops->encode)
2052                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2053         else
2054                 encode_uint32(xdr, 0);
2055 }
2056
2057 static int
2058 encode_secinfo_no_name(struct xdr_stream *xdr,
2059                        const struct nfs41_secinfo_no_name_args *args,
2060                        struct compound_hdr *hdr)
2061 {
2062         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2063         encode_uint32(xdr, args->style);
2064         return 0;
2065 }
2066
2067 static void encode_test_stateid(struct xdr_stream *xdr,
2068                                 const struct nfs41_test_stateid_args *args,
2069                                 struct compound_hdr *hdr)
2070 {
2071         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2072         encode_uint32(xdr, 1);
2073         encode_nfs4_stateid(xdr, args->stateid);
2074 }
2075
2076 static void encode_free_stateid(struct xdr_stream *xdr,
2077                                 const struct nfs41_free_stateid_args *args,
2078                                 struct compound_hdr *hdr)
2079 {
2080         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2081         encode_nfs4_stateid(xdr, &args->stateid);
2082 }
2083 #else
2084 static inline void
2085 encode_layoutreturn(struct xdr_stream *xdr,
2086                     const struct nfs4_layoutreturn_args *args,
2087                     struct compound_hdr *hdr)
2088 {
2089 }
2090
2091 static void
2092 encode_layoutget(struct xdr_stream *xdr,
2093                       const struct nfs4_layoutget_args *args,
2094                       struct compound_hdr *hdr)
2095 {
2096 }
2097 #endif /* CONFIG_NFS_V4_1 */
2098
2099 /*
2100  * END OF "GENERIC" ENCODE ROUTINES.
2101  */
2102
2103 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2104 {
2105 #if defined(CONFIG_NFS_V4_1)
2106         struct nfs4_session *session = args->sa_slot->table->session;
2107         if (session)
2108                 return session->clp->cl_mvops->minor_version;
2109 #endif /* CONFIG_NFS_V4_1 */
2110         return 0;
2111 }
2112
2113 /*
2114  * Encode an ACCESS request
2115  */
2116 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2117                                 const void *data)
2118 {
2119         const struct nfs4_accessargs *args = data;
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         encode_compound_hdr(xdr, req, &hdr);
2125         encode_sequence(xdr, &args->seq_args, &hdr);
2126         encode_putfh(xdr, args->fh, &hdr);
2127         encode_access(xdr, args->access, &hdr);
2128         if (args->bitmask)
2129                 encode_getfattr(xdr, args->bitmask, &hdr);
2130         encode_nops(&hdr);
2131 }
2132
2133 /*
2134  * Encode LOOKUP request
2135  */
2136 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2137                                 const void *data)
2138 {
2139         const struct nfs4_lookup_arg *args = data;
2140         struct compound_hdr hdr = {
2141                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2142         };
2143
2144         encode_compound_hdr(xdr, req, &hdr);
2145         encode_sequence(xdr, &args->seq_args, &hdr);
2146         encode_putfh(xdr, args->dir_fh, &hdr);
2147         encode_lookup(xdr, args->name, &hdr);
2148         encode_getfh(xdr, &hdr);
2149         encode_getfattr(xdr, args->bitmask, &hdr);
2150         encode_nops(&hdr);
2151 }
2152
2153 /*
2154  * Encode LOOKUPP request
2155  */
2156 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2157                 const void *data)
2158 {
2159         const struct nfs4_lookupp_arg *args = data;
2160         struct compound_hdr hdr = {
2161                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2162         };
2163
2164         encode_compound_hdr(xdr, req, &hdr);
2165         encode_sequence(xdr, &args->seq_args, &hdr);
2166         encode_putfh(xdr, args->fh, &hdr);
2167         encode_lookupp(xdr, &hdr);
2168         encode_getfh(xdr, &hdr);
2169         encode_getfattr(xdr, args->bitmask, &hdr);
2170         encode_nops(&hdr);
2171 }
2172
2173 /*
2174  * Encode LOOKUP_ROOT request
2175  */
2176 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2177                                      struct xdr_stream *xdr,
2178                                      const void *data)
2179 {
2180         const struct nfs4_lookup_root_arg *args = data;
2181         struct compound_hdr hdr = {
2182                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183         };
2184
2185         encode_compound_hdr(xdr, req, &hdr);
2186         encode_sequence(xdr, &args->seq_args, &hdr);
2187         encode_putrootfh(xdr, &hdr);
2188         encode_getfh(xdr, &hdr);
2189         encode_getfattr(xdr, args->bitmask, &hdr);
2190         encode_nops(&hdr);
2191 }
2192
2193 /*
2194  * Encode REMOVE request
2195  */
2196 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2197                                 const void *data)
2198 {
2199         const struct nfs_removeargs *args = data;
2200         struct compound_hdr hdr = {
2201                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2202         };
2203
2204         encode_compound_hdr(xdr, req, &hdr);
2205         encode_sequence(xdr, &args->seq_args, &hdr);
2206         encode_putfh(xdr, args->fh, &hdr);
2207         encode_remove(xdr, &args->name, &hdr);
2208         encode_nops(&hdr);
2209 }
2210
2211 /*
2212  * Encode RENAME request
2213  */
2214 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2215                                 const void *data)
2216 {
2217         const struct nfs_renameargs *args = data;
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         encode_compound_hdr(xdr, req, &hdr);
2223         encode_sequence(xdr, &args->seq_args, &hdr);
2224         encode_putfh(xdr, args->old_dir, &hdr);
2225         encode_savefh(xdr, &hdr);
2226         encode_putfh(xdr, args->new_dir, &hdr);
2227         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2228         encode_nops(&hdr);
2229 }
2230
2231 /*
2232  * Encode LINK request
2233  */
2234 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2235                               const void *data)
2236 {
2237         const struct nfs4_link_arg *args = data;
2238         struct compound_hdr hdr = {
2239                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240         };
2241
2242         encode_compound_hdr(xdr, req, &hdr);
2243         encode_sequence(xdr, &args->seq_args, &hdr);
2244         encode_putfh(xdr, args->fh, &hdr);
2245         encode_savefh(xdr, &hdr);
2246         encode_putfh(xdr, args->dir_fh, &hdr);
2247         encode_link(xdr, args->name, &hdr);
2248         encode_restorefh(xdr, &hdr);
2249         encode_getfattr(xdr, args->bitmask, &hdr);
2250         encode_nops(&hdr);
2251 }
2252
2253 /*
2254  * Encode CREATE request
2255  */
2256 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2257                                 const void *data)
2258 {
2259         const struct nfs4_create_arg *args = data;
2260         struct compound_hdr hdr = {
2261                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2262         };
2263
2264         encode_compound_hdr(xdr, req, &hdr);
2265         encode_sequence(xdr, &args->seq_args, &hdr);
2266         encode_putfh(xdr, args->dir_fh, &hdr);
2267         encode_create(xdr, args, &hdr);
2268         encode_getfh(xdr, &hdr);
2269         encode_getfattr(xdr, args->bitmask, &hdr);
2270         encode_nops(&hdr);
2271 }
2272
2273 /*
2274  * Encode SYMLINK request
2275  */
2276 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2277                                  const void *data)
2278 {
2279         const struct nfs4_create_arg *args = data;
2280
2281         nfs4_xdr_enc_create(req, xdr, args);
2282 }
2283
2284 /*
2285  * Encode GETATTR request
2286  */
2287 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2288                                  const void *data)
2289 {
2290         const struct nfs4_getattr_arg *args = data;
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         encode_compound_hdr(xdr, req, &hdr);
2296         encode_sequence(xdr, &args->seq_args, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_getfattr(xdr, args->bitmask, &hdr);
2299         encode_nops(&hdr);
2300 }
2301
2302 /*
2303  * Encode a CLOSE request
2304  */
2305 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2306                                const void *data)
2307 {
2308         const struct nfs_closeargs *args = data;
2309         struct compound_hdr hdr = {
2310                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2311         };
2312
2313         encode_compound_hdr(xdr, req, &hdr);
2314         encode_sequence(xdr, &args->seq_args, &hdr);
2315         encode_putfh(xdr, args->fh, &hdr);
2316         if (args->lr_args)
2317                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2318         if (args->bitmask != NULL)
2319                 encode_getfattr(xdr, args->bitmask, &hdr);
2320         encode_close(xdr, args, &hdr);
2321         encode_nops(&hdr);
2322 }
2323
2324 /*
2325  * Encode an OPEN request
2326  */
2327 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2328                               const void *data)
2329 {
2330         const struct nfs_openargs *args = data;
2331         struct compound_hdr hdr = {
2332                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2333         };
2334
2335         encode_compound_hdr(xdr, req, &hdr);
2336         encode_sequence(xdr, &args->seq_args, &hdr);
2337         encode_putfh(xdr, args->fh, &hdr);
2338         encode_open(xdr, args, &hdr);
2339         encode_getfh(xdr, &hdr);
2340         if (args->access)
2341                 encode_access(xdr, args->access, &hdr);
2342         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2343         if (args->lg_args) {
2344                 encode_layoutget(xdr, args->lg_args, &hdr);
2345                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2346                                         args->lg_args->layout.pglen,
2347                                         hdr.replen - pagepad_maxsz);
2348         }
2349         encode_nops(&hdr);
2350 }
2351
2352 /*
2353  * Encode an OPEN_CONFIRM request
2354  */
2355 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2356                                       struct xdr_stream *xdr,
2357                                       const void *data)
2358 {
2359         const struct nfs_open_confirmargs *args = data;
2360         struct compound_hdr hdr = {
2361                 .nops   = 0,
2362         };
2363
2364         encode_compound_hdr(xdr, req, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_open_confirm(xdr, args, &hdr);
2367         encode_nops(&hdr);
2368 }
2369
2370 /*
2371  * Encode an OPEN request with no attributes.
2372  */
2373 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2374                                      struct xdr_stream *xdr,
2375                                      const void *data)
2376 {
2377         const struct nfs_openargs *args = data;
2378         struct compound_hdr hdr = {
2379                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2380         };
2381
2382         encode_compound_hdr(xdr, req, &hdr);
2383         encode_sequence(xdr, &args->seq_args, &hdr);
2384         encode_putfh(xdr, args->fh, &hdr);
2385         encode_open(xdr, args, &hdr);
2386         if (args->access)
2387                 encode_access(xdr, args->access, &hdr);
2388         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2389         if (args->lg_args) {
2390                 encode_layoutget(xdr, args->lg_args, &hdr);
2391                 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2392                                         args->lg_args->layout.pglen,
2393                                         hdr.replen - pagepad_maxsz);
2394         }
2395         encode_nops(&hdr);
2396 }
2397
2398 /*
2399  * Encode an OPEN_DOWNGRADE request
2400  */
2401 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2402                                         struct xdr_stream *xdr,
2403                                         const void *data)
2404 {
2405         const struct nfs_closeargs *args = data;
2406         struct compound_hdr hdr = {
2407                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2408         };
2409
2410         encode_compound_hdr(xdr, req, &hdr);
2411         encode_sequence(xdr, &args->seq_args, &hdr);
2412         encode_putfh(xdr, args->fh, &hdr);
2413         if (args->lr_args)
2414                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2415         encode_open_downgrade(xdr, args, &hdr);
2416         encode_nops(&hdr);
2417 }
2418
2419 /*
2420  * Encode a LOCK request
2421  */
2422 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2423                               const void *data)
2424 {
2425         const struct nfs_lock_args *args = data;
2426         struct compound_hdr hdr = {
2427                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428         };
2429
2430         encode_compound_hdr(xdr, req, &hdr);
2431         encode_sequence(xdr, &args->seq_args, &hdr);
2432         encode_putfh(xdr, args->fh, &hdr);
2433         encode_lock(xdr, args, &hdr);
2434         encode_nops(&hdr);
2435 }
2436
2437 /*
2438  * Encode a LOCKT request
2439  */
2440 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2441                                const void *data)
2442 {
2443         const struct nfs_lockt_args *args = data;
2444         struct compound_hdr hdr = {
2445                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2446         };
2447
2448         encode_compound_hdr(xdr, req, &hdr);
2449         encode_sequence(xdr, &args->seq_args, &hdr);
2450         encode_putfh(xdr, args->fh, &hdr);
2451         encode_lockt(xdr, args, &hdr);
2452         encode_nops(&hdr);
2453 }
2454
2455 /*
2456  * Encode a LOCKU request
2457  */
2458 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2459                                const void *data)
2460 {
2461         const struct nfs_locku_args *args = data;
2462         struct compound_hdr hdr = {
2463                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2464         };
2465
2466         encode_compound_hdr(xdr, req, &hdr);
2467         encode_sequence(xdr, &args->seq_args, &hdr);
2468         encode_putfh(xdr, args->fh, &hdr);
2469         encode_locku(xdr, args, &hdr);
2470         encode_nops(&hdr);
2471 }
2472
2473 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2474                                            struct xdr_stream *xdr,
2475                                            const void *data)
2476 {
2477         const struct nfs_release_lockowner_args *args = data;
2478         struct compound_hdr hdr = {
2479                 .minorversion = 0,
2480         };
2481
2482         encode_compound_hdr(xdr, req, &hdr);
2483         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2484         encode_nops(&hdr);
2485 }
2486
2487 /*
2488  * Encode a READLINK request
2489  */
2490 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2491                                   const void *data)
2492 {
2493         const struct nfs4_readlink *args = data;
2494         struct compound_hdr hdr = {
2495                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496         };
2497
2498         encode_compound_hdr(xdr, req, &hdr);
2499         encode_sequence(xdr, &args->seq_args, &hdr);
2500         encode_putfh(xdr, args->fh, &hdr);
2501         encode_readlink(xdr, args, req, &hdr);
2502
2503         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2504                                 args->pglen, hdr.replen - pagepad_maxsz);
2505         encode_nops(&hdr);
2506 }
2507
2508 /*
2509  * Encode a READDIR request
2510  */
2511 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2512                                  const void *data)
2513 {
2514         const struct nfs4_readdir_arg *args = data;
2515         struct compound_hdr hdr = {
2516                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2517         };
2518
2519         encode_compound_hdr(xdr, req, &hdr);
2520         encode_sequence(xdr, &args->seq_args, &hdr);
2521         encode_putfh(xdr, args->fh, &hdr);
2522         encode_readdir(xdr, args, req, &hdr);
2523
2524         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2525                                 args->count, hdr.replen - pagepad_maxsz);
2526         encode_nops(&hdr);
2527 }
2528
2529 /*
2530  * Encode a READ request
2531  */
2532 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2533                               const void *data)
2534 {
2535         const struct nfs_pgio_args *args = data;
2536         struct compound_hdr hdr = {
2537                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538         };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->seq_args, &hdr);
2542         encode_putfh(xdr, args->fh, &hdr);
2543         encode_read(xdr, args, &hdr);
2544
2545         rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2546                                 args->count, hdr.replen - pagepad_maxsz);
2547         req->rq_rcv_buf.flags |= XDRBUF_READ;
2548         encode_nops(&hdr);
2549 }
2550
2551 /*
2552  * Encode an SETATTR request
2553  */
2554 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2555                                  const void *data)
2556 {
2557         const struct nfs_setattrargs *args = data;
2558         struct compound_hdr hdr = {
2559                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2560         };
2561
2562         encode_compound_hdr(xdr, req, &hdr);
2563         encode_sequence(xdr, &args->seq_args, &hdr);
2564         encode_putfh(xdr, args->fh, &hdr);
2565         encode_setattr(xdr, args, args->server, &hdr);
2566         encode_getfattr(xdr, args->bitmask, &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * Encode a GETACL request
2572  */
2573 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                 const void *data)
2575 {
2576         const struct nfs_getaclargs *args = data;
2577         struct compound_hdr hdr = {
2578                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2579         };
2580         const __u32 nfs4_acl_bitmap[1] = {
2581                 [0] = FATTR4_WORD0_ACL,
2582         };
2583         uint32_t replen;
2584
2585         encode_compound_hdr(xdr, req, &hdr);
2586         encode_sequence(xdr, &args->seq_args, &hdr);
2587         encode_putfh(xdr, args->fh, &hdr);
2588         replen = hdr.replen + op_decode_hdr_maxsz;
2589         encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2590                         ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2591
2592         rpc_prepare_reply_pages(req, args->acl_pages, 0,
2593                                 args->acl_len, replen);
2594         encode_nops(&hdr);
2595 }
2596
2597 /*
2598  * Encode a WRITE request
2599  */
2600 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2601                                const void *data)
2602 {
2603         const struct nfs_pgio_args *args = data;
2604         struct compound_hdr hdr = {
2605                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606         };
2607
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_sequence(xdr, &args->seq_args, &hdr);
2610         encode_putfh(xdr, args->fh, &hdr);
2611         encode_write(xdr, args, &hdr);
2612         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2613         if (args->bitmask)
2614                 encode_getfattr(xdr, args->bitmask, &hdr);
2615         encode_nops(&hdr);
2616 }
2617
2618 /*
2619  *  a COMMIT request
2620  */
2621 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2622                                 const void *data)
2623 {
2624         const struct nfs_commitargs *args = data;
2625         struct compound_hdr hdr = {
2626                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2627         };
2628
2629         encode_compound_hdr(xdr, req, &hdr);
2630         encode_sequence(xdr, &args->seq_args, &hdr);
2631         encode_putfh(xdr, args->fh, &hdr);
2632         encode_commit(xdr, args, &hdr);
2633         encode_nops(&hdr);
2634 }
2635
2636 /*
2637  * FSINFO request
2638  */
2639 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2640                                 const void *data)
2641 {
2642         const struct nfs4_fsinfo_arg *args = data;
2643         struct compound_hdr hdr = {
2644                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2645         };
2646
2647         encode_compound_hdr(xdr, req, &hdr);
2648         encode_sequence(xdr, &args->seq_args, &hdr);
2649         encode_putfh(xdr, args->fh, &hdr);
2650         encode_fsinfo(xdr, args->bitmask, &hdr);
2651         encode_nops(&hdr);
2652 }
2653
2654 /*
2655  * a PATHCONF request
2656  */
2657 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2658                                   const void *data)
2659 {
2660         const struct nfs4_pathconf_arg *args = data;
2661         struct compound_hdr hdr = {
2662                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2663         };
2664
2665         encode_compound_hdr(xdr, req, &hdr);
2666         encode_sequence(xdr, &args->seq_args, &hdr);
2667         encode_putfh(xdr, args->fh, &hdr);
2668         encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2669                         ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2670         encode_nops(&hdr);
2671 }
2672
2673 /*
2674  * a STATFS request
2675  */
2676 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2677                                 const void *data)
2678 {
2679         const struct nfs4_statfs_arg *args = data;
2680         struct compound_hdr hdr = {
2681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682         };
2683
2684         encode_compound_hdr(xdr, req, &hdr);
2685         encode_sequence(xdr, &args->seq_args, &hdr);
2686         encode_putfh(xdr, args->fh, &hdr);
2687         encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2688                         ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2689         encode_nops(&hdr);
2690 }
2691
2692 /*
2693  * GETATTR_BITMAP request
2694  */
2695 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2696                                      struct xdr_stream *xdr,
2697                                      const void *data)
2698 {
2699         const struct nfs4_server_caps_arg *args = data;
2700         const u32 *bitmask = args->bitmask;
2701         struct compound_hdr hdr = {
2702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2703         };
2704
2705         encode_compound_hdr(xdr, req, &hdr);
2706         encode_sequence(xdr, &args->seq_args, &hdr);
2707         encode_putfh(xdr, args->fhandle, &hdr);
2708         encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2709         encode_nops(&hdr);
2710 }
2711
2712 /*
2713  * a RENEW request
2714  */
2715 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2716                                const void *data)
2717
2718 {
2719         const struct nfs_client *clp = data;
2720         struct compound_hdr hdr = {
2721                 .nops   = 0,
2722         };
2723
2724         encode_compound_hdr(xdr, req, &hdr);
2725         encode_renew(xdr, clp->cl_clientid, &hdr);
2726         encode_nops(&hdr);
2727 }
2728
2729 /*
2730  * a SETCLIENTID request
2731  */
2732 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2733                                      struct xdr_stream *xdr,
2734                                      const void *data)
2735 {
2736         const struct nfs4_setclientid *sc = data;
2737         struct compound_hdr hdr = {
2738                 .nops   = 0,
2739         };
2740
2741         encode_compound_hdr(xdr, req, &hdr);
2742         encode_setclientid(xdr, sc, &hdr);
2743         encode_nops(&hdr);
2744 }
2745
2746 /*
2747  * a SETCLIENTID_CONFIRM request
2748  */
2749 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2750                                              struct xdr_stream *xdr,
2751                                              const void *data)
2752 {
2753         const struct nfs4_setclientid_res *arg = data;
2754         struct compound_hdr hdr = {
2755                 .nops   = 0,
2756         };
2757
2758         encode_compound_hdr(xdr, req, &hdr);
2759         encode_setclientid_confirm(xdr, arg, &hdr);
2760         encode_nops(&hdr);
2761 }
2762
2763 /*
2764  * DELEGRETURN request
2765  */
2766 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2767                                      struct xdr_stream *xdr,
2768                                      const void *data)
2769 {
2770         const struct nfs4_delegreturnargs *args = data;
2771         struct compound_hdr hdr = {
2772                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2773         };
2774
2775         encode_compound_hdr(xdr, req, &hdr);
2776         encode_sequence(xdr, &args->seq_args, &hdr);
2777         encode_putfh(xdr, args->fhandle, &hdr);
2778         if (args->lr_args)
2779                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2780         if (args->bitmask)
2781                 encode_getfattr(xdr, args->bitmask, &hdr);
2782         encode_delegreturn(xdr, args->stateid, &hdr);
2783         encode_nops(&hdr);
2784 }
2785
2786 /*
2787  * Encode FS_LOCATIONS request
2788  */
2789 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2790                                       struct xdr_stream *xdr,
2791                                       const void *data)
2792 {
2793         const struct nfs4_fs_locations_arg *args = data;
2794         struct compound_hdr hdr = {
2795                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2796         };
2797         uint32_t replen;
2798
2799         encode_compound_hdr(xdr, req, &hdr);
2800         encode_sequence(xdr, &args->seq_args, &hdr);
2801         if (args->migration) {
2802                 encode_putfh(xdr, args->fh, &hdr);
2803                 replen = hdr.replen;
2804                 encode_fs_locations(xdr, args->bitmask, &hdr);
2805                 if (args->renew)
2806                         encode_renew(xdr, args->clientid, &hdr);
2807         } else {
2808                 encode_putfh(xdr, args->dir_fh, &hdr);
2809                 encode_lookup(xdr, args->name, &hdr);
2810                 replen = hdr.replen;
2811                 encode_fs_locations(xdr, args->bitmask, &hdr);
2812         }
2813
2814         rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2815                                 PAGE_SIZE, replen);
2816         encode_nops(&hdr);
2817 }
2818
2819 /*
2820  * Encode SECINFO request
2821  */
2822 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2823                                 struct xdr_stream *xdr,
2824                                 const void *data)
2825 {
2826         const struct nfs4_secinfo_arg *args = data;
2827         struct compound_hdr hdr = {
2828                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2829         };
2830
2831         encode_compound_hdr(xdr, req, &hdr);
2832         encode_sequence(xdr, &args->seq_args, &hdr);
2833         encode_putfh(xdr, args->dir_fh, &hdr);
2834         encode_secinfo(xdr, args->name, &hdr);
2835         encode_nops(&hdr);
2836 }
2837
2838 /*
2839  * Encode FSID_PRESENT request
2840  */
2841 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2842                                       struct xdr_stream *xdr,
2843                                       const void *data)
2844 {
2845         const struct nfs4_fsid_present_arg *args = data;
2846         struct compound_hdr hdr = {
2847                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2848         };
2849
2850         encode_compound_hdr(xdr, req, &hdr);
2851         encode_sequence(xdr, &args->seq_args, &hdr);
2852         encode_putfh(xdr, args->fh, &hdr);
2853         encode_getfh(xdr, &hdr);
2854         if (args->renew)
2855                 encode_renew(xdr, args->clientid, &hdr);
2856         encode_nops(&hdr);
2857 }
2858
2859 #if defined(CONFIG_NFS_V4_1)
2860 /*
2861  * BIND_CONN_TO_SESSION request
2862  */
2863 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2864                                 struct xdr_stream *xdr,
2865                                 const void *data)
2866 {
2867         const struct nfs41_bind_conn_to_session_args *args = data;
2868         struct compound_hdr hdr = {
2869                 .minorversion = args->client->cl_mvops->minor_version,
2870         };
2871
2872         encode_compound_hdr(xdr, req, &hdr);
2873         encode_bind_conn_to_session(xdr, args, &hdr);
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  * EXCHANGE_ID request
2879  */
2880 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2881                                      struct xdr_stream *xdr,
2882                                      const void *data)
2883 {
2884         const struct nfs41_exchange_id_args *args = data;
2885         struct compound_hdr hdr = {
2886                 .minorversion = args->client->cl_mvops->minor_version,
2887         };
2888
2889         encode_compound_hdr(xdr, req, &hdr);
2890         encode_exchange_id(xdr, args, &hdr);
2891         encode_nops(&hdr);
2892 }
2893
2894 /*
2895  * a CREATE_SESSION request
2896  */
2897 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2898                                         struct xdr_stream *xdr,
2899                                         const void *data)
2900 {
2901         const struct nfs41_create_session_args *args = data;
2902         struct compound_hdr hdr = {
2903                 .minorversion = args->client->cl_mvops->minor_version,
2904         };
2905
2906         encode_compound_hdr(xdr, req, &hdr);
2907         encode_create_session(xdr, args, &hdr);
2908         encode_nops(&hdr);
2909 }
2910
2911 /*
2912  * a DESTROY_SESSION request
2913  */
2914 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2915                                          struct xdr_stream *xdr,
2916                                          const void *data)
2917 {
2918         const struct nfs4_session *session = data;
2919         struct compound_hdr hdr = {
2920                 .minorversion = session->clp->cl_mvops->minor_version,
2921         };
2922
2923         encode_compound_hdr(xdr, req, &hdr);
2924         encode_destroy_session(xdr, session, &hdr);
2925         encode_nops(&hdr);
2926 }
2927
2928 /*
2929  * a DESTROY_CLIENTID request
2930  */
2931 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2932                                          struct xdr_stream *xdr,
2933                                          const void *data)
2934 {
2935         const struct nfs_client *clp = data;
2936         struct compound_hdr hdr = {
2937                 .minorversion = clp->cl_mvops->minor_version,
2938         };
2939
2940         encode_compound_hdr(xdr, req, &hdr);
2941         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2942         encode_nops(&hdr);
2943 }
2944
2945 /*
2946  * a SEQUENCE request
2947  */
2948 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2949                                   const void *data)
2950 {
2951         const struct nfs4_sequence_args *args = data;
2952         struct compound_hdr hdr = {
2953                 .minorversion = nfs4_xdr_minorversion(args),
2954         };
2955
2956         encode_compound_hdr(xdr, req, &hdr);
2957         encode_sequence(xdr, args, &hdr);
2958         encode_nops(&hdr);
2959 }
2960
2961 #endif
2962
2963 /*
2964  * a GET_LEASE_TIME request
2965  */
2966 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2967                                         struct xdr_stream *xdr,
2968                                         const void *data)
2969 {
2970         const struct nfs4_get_lease_time_args *args = data;
2971         struct compound_hdr hdr = {
2972                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2973         };
2974         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2975
2976         encode_compound_hdr(xdr, req, &hdr);
2977         encode_sequence(xdr, &args->la_seq_args, &hdr);
2978         encode_putrootfh(xdr, &hdr);
2979         encode_fsinfo(xdr, lease_bitmap, &hdr);
2980         encode_nops(&hdr);
2981 }
2982
2983 #ifdef CONFIG_NFS_V4_1
2984
2985 /*
2986  * a RECLAIM_COMPLETE request
2987  */
2988 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2989                                           struct xdr_stream *xdr,
2990                                           const void *data)
2991 {
2992         const struct nfs41_reclaim_complete_args *args = data;
2993         struct compound_hdr hdr = {
2994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2995         };
2996
2997         encode_compound_hdr(xdr, req, &hdr);
2998         encode_sequence(xdr, &args->seq_args, &hdr);
2999         encode_reclaim_complete(xdr, args, &hdr);
3000         encode_nops(&hdr);
3001 }
3002
3003 /*
3004  * Encode GETDEVICEINFO request
3005  */
3006 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3007                                        struct xdr_stream *xdr,
3008                                        const void *data)
3009 {
3010         const struct nfs4_getdeviceinfo_args *args = data;
3011         struct compound_hdr hdr = {
3012                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3013         };
3014         uint32_t replen;
3015
3016         encode_compound_hdr(xdr, req, &hdr);
3017         encode_sequence(xdr, &args->seq_args, &hdr);
3018
3019         replen = hdr.replen + op_decode_hdr_maxsz + 2;
3020
3021         encode_getdeviceinfo(xdr, args, &hdr);
3022
3023         /* set up reply kvec. device_addr4 opaque data is read into the
3024          * pages */
3025         rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3026                                 args->pdev->pglen, replen);
3027         encode_nops(&hdr);
3028 }
3029
3030 /*
3031  *  Encode LAYOUTGET request
3032  */
3033 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3034                                    struct xdr_stream *xdr,
3035                                    const void *data)
3036 {
3037         const struct nfs4_layoutget_args *args = data;
3038         struct compound_hdr hdr = {
3039                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3040         };
3041
3042         encode_compound_hdr(xdr, req, &hdr);
3043         encode_sequence(xdr, &args->seq_args, &hdr);
3044         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3045         encode_layoutget(xdr, args, &hdr);
3046
3047         rpc_prepare_reply_pages(req, args->layout.pages, 0,
3048                                 args->layout.pglen, hdr.replen - pagepad_maxsz);
3049         encode_nops(&hdr);
3050 }
3051
3052 /*
3053  *  Encode LAYOUTCOMMIT request
3054  */
3055 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3056                                       struct xdr_stream *xdr,
3057                                       const void *priv)
3058 {
3059         const struct nfs4_layoutcommit_args *args = priv;
3060         struct nfs4_layoutcommit_data *data =
3061                 container_of(args, struct nfs4_layoutcommit_data, args);
3062         struct compound_hdr hdr = {
3063                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3064         };
3065
3066         encode_compound_hdr(xdr, req, &hdr);
3067         encode_sequence(xdr, &args->seq_args, &hdr);
3068         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3069         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3070         encode_getfattr(xdr, args->bitmask, &hdr);
3071         encode_nops(&hdr);
3072 }
3073
3074 /*
3075  * Encode LAYOUTRETURN request
3076  */
3077 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3078                                       struct xdr_stream *xdr,
3079                                       const void *data)
3080 {
3081         const struct nfs4_layoutreturn_args *args = data;
3082         struct compound_hdr hdr = {
3083                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3084         };
3085
3086         encode_compound_hdr(xdr, req, &hdr);
3087         encode_sequence(xdr, &args->seq_args, &hdr);
3088         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3089         encode_layoutreturn(xdr, args, &hdr);
3090         encode_nops(&hdr);
3091 }
3092
3093 /*
3094  * Encode SECINFO_NO_NAME request
3095  */
3096 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3097                                         struct xdr_stream *xdr,
3098                                         const void *data)
3099 {
3100         const struct nfs41_secinfo_no_name_args *args = data;
3101         struct compound_hdr hdr = {
3102                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3103         };
3104
3105         encode_compound_hdr(xdr, req, &hdr);
3106         encode_sequence(xdr, &args->seq_args, &hdr);
3107         encode_putrootfh(xdr, &hdr);
3108         encode_secinfo_no_name(xdr, args, &hdr);
3109         encode_nops(&hdr);
3110 }
3111
3112 /*
3113  *  Encode TEST_STATEID request
3114  */
3115 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3116                                       struct xdr_stream *xdr,
3117                                       const void *data)
3118 {
3119         const struct nfs41_test_stateid_args *args = data;
3120         struct compound_hdr hdr = {
3121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3122         };
3123
3124         encode_compound_hdr(xdr, req, &hdr);
3125         encode_sequence(xdr, &args->seq_args, &hdr);
3126         encode_test_stateid(xdr, args, &hdr);
3127         encode_nops(&hdr);
3128 }
3129
3130 /*
3131  *  Encode FREE_STATEID request
3132  */
3133 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3134                                      struct xdr_stream *xdr,
3135                                      const void *data)
3136 {
3137         const struct nfs41_free_stateid_args *args = data;
3138         struct compound_hdr hdr = {
3139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3140         };
3141
3142         encode_compound_hdr(xdr, req, &hdr);
3143         encode_sequence(xdr, &args->seq_args, &hdr);
3144         encode_free_stateid(xdr, args, &hdr);
3145         encode_nops(&hdr);
3146 }
3147 #endif /* CONFIG_NFS_V4_1 */
3148
3149 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3150 {
3151         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3152                         NFS4_OPAQUE_LIMIT);
3153         if (unlikely(ret < 0))
3154                 return -EIO;
3155         *len = ret;
3156         return 0;
3157 }
3158
3159 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3160 {
3161         __be32 *p;
3162
3163         p = xdr_inline_decode(xdr, 8);
3164         if (unlikely(!p))
3165                 return -EIO;
3166         hdr->status = be32_to_cpup(p++);
3167         hdr->taglen = be32_to_cpup(p);
3168
3169         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3170         if (unlikely(!p))
3171                 return -EIO;
3172         hdr->tag = (char *)p;
3173         p += XDR_QUADLEN(hdr->taglen);
3174         hdr->nops = be32_to_cpup(p);
3175         if (unlikely(hdr->nops < 1))
3176                 return nfs4_stat_to_errno(hdr->status);
3177         return 0;
3178 }
3179
3180 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3181                 int *nfs_retval)
3182 {
3183         __be32 *p;
3184         uint32_t opnum;
3185         int32_t nfserr;
3186
3187         p = xdr_inline_decode(xdr, 8);
3188         if (unlikely(!p))
3189                 goto out_overflow;
3190         opnum = be32_to_cpup(p++);
3191         if (unlikely(opnum != expected))
3192                 goto out_bad_operation;
3193         if (unlikely(*p != cpu_to_be32(NFS_OK)))
3194                 goto out_status;
3195         *nfs_retval = 0;
3196         return true;
3197 out_status:
3198         nfserr = be32_to_cpup(p);
3199         trace_nfs4_xdr_status(xdr, opnum, nfserr);
3200         *nfs_retval = nfs4_stat_to_errno(nfserr);
3201         return true;
3202 out_bad_operation:
3203         dprintk("nfs: Server returned operation"
3204                 " %d but we issued a request for %d\n",
3205                         opnum, expected);
3206         *nfs_retval = -EREMOTEIO;
3207         return false;
3208 out_overflow:
3209         *nfs_retval = -EIO;
3210         return false;
3211 }
3212
3213 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3214 {
3215         int retval;
3216
3217         __decode_op_hdr(xdr, expected, &retval);
3218         return retval;
3219 }
3220
3221 /* Dummy routine */
3222 static int decode_ace(struct xdr_stream *xdr, void *ace)
3223 {
3224         __be32 *p;
3225         unsigned int strlen;
3226         char *str;
3227
3228         p = xdr_inline_decode(xdr, 12);
3229         if (unlikely(!p))
3230                 return -EIO;
3231         return decode_opaque_inline(xdr, &strlen, &str);
3232 }
3233
3234 static ssize_t
3235 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3236 {
3237         ssize_t ret;
3238
3239         ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3240         if (likely(ret >= 0))
3241                 return ret;
3242         if (ret != -EMSGSIZE)
3243                 return -EIO;
3244         return sz;
3245 }
3246
3247 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3248 {
3249         ssize_t ret;
3250         ret = decode_bitmap4(xdr, bitmap, 3);
3251         return ret < 0 ? ret : 0;
3252 }
3253
3254 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3255 {
3256         __be32 *p;
3257
3258         p = xdr_inline_decode(xdr, 4);
3259         if (unlikely(!p))
3260                 return -EIO;
3261         *attrlen = be32_to_cpup(p);
3262         *savep = xdr_stream_pos(xdr);
3263         return 0;
3264 }
3265
3266 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3267 {
3268         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3269                 int ret;
3270                 ret = decode_attr_bitmap(xdr, bitmask);
3271                 if (unlikely(ret < 0))
3272                         return ret;
3273                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3274         } else
3275                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3276         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3277                 bitmask[0], bitmask[1], bitmask[2]);
3278         return 0;
3279 }
3280
3281 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3282 {
3283         __be32 *p;
3284         int ret = 0;
3285
3286         *type = 0;
3287         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3288                 return -EIO;
3289         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3290                 p = xdr_inline_decode(xdr, 4);
3291                 if (unlikely(!p))
3292                         return -EIO;
3293                 *type = be32_to_cpup(p);
3294                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3295                         dprintk("%s: bad type %d\n", __func__, *type);
3296                         return -EIO;
3297                 }
3298                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3299                 ret = NFS_ATTR_FATTR_TYPE;
3300         }
3301         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3302         return ret;
3303 }
3304
3305 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3306                                       uint32_t *bitmap, uint32_t *type)
3307 {
3308         __be32 *p;
3309
3310         *type = 0;
3311         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3312                 return -EIO;
3313         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3314                 p = xdr_inline_decode(xdr, 4);
3315                 if (unlikely(!p))
3316                         return -EIO;
3317                 *type = be32_to_cpup(p);
3318                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3319         }
3320         dprintk("%s: expire type=0x%x\n", __func__, *type);
3321         return 0;
3322 }
3323
3324 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3325 {
3326         __be32 *p;
3327         int ret = 0;
3328
3329         *change = 0;
3330         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3331                 return -EIO;
3332         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3333                 p = xdr_inline_decode(xdr, 8);
3334                 if (unlikely(!p))
3335                         return -EIO;
3336                 xdr_decode_hyper(p, change);
3337                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3338                 ret = NFS_ATTR_FATTR_CHANGE;
3339         }
3340         dprintk("%s: change attribute=%Lu\n", __func__,
3341                         (unsigned long long)*change);
3342         return ret;
3343 }
3344
3345 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3346 {
3347         __be32 *p;
3348         int ret = 0;
3349
3350         *size = 0;
3351         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3352                 return -EIO;
3353         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3354                 p = xdr_inline_decode(xdr, 8);
3355                 if (unlikely(!p))
3356                         return -EIO;
3357                 xdr_decode_hyper(p, size);
3358                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3359                 ret = NFS_ATTR_FATTR_SIZE;
3360         }
3361         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3362         return ret;
3363 }
3364
3365 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3366 {
3367         __be32 *p;
3368
3369         *res = 0;
3370         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3371                 return -EIO;
3372         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3373                 p = xdr_inline_decode(xdr, 4);
3374                 if (unlikely(!p))
3375                         return -EIO;
3376                 *res = be32_to_cpup(p);
3377                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3378         }
3379         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3380         return 0;
3381 }
3382
3383 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3384 {
3385         __be32 *p;
3386
3387         *res = 0;
3388         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3389                 return -EIO;
3390         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3391                 p = xdr_inline_decode(xdr, 4);
3392                 if (unlikely(!p))
3393                         return -EIO;
3394                 *res = be32_to_cpup(p);
3395                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3396         }
3397         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3398         return 0;
3399 }
3400
3401 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3402 {
3403         __be32 *p;
3404         int ret = 0;
3405
3406         fsid->major = 0;
3407         fsid->minor = 0;
3408         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3409                 return -EIO;
3410         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3411                 p = xdr_inline_decode(xdr, 16);
3412                 if (unlikely(!p))
3413                         return -EIO;
3414                 p = xdr_decode_hyper(p, &fsid->major);
3415                 xdr_decode_hyper(p, &fsid->minor);
3416                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3417                 ret = NFS_ATTR_FATTR_FSID;
3418         }
3419         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3420                         (unsigned long long)fsid->major,
3421                         (unsigned long long)fsid->minor);
3422         return ret;
3423 }
3424
3425 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3426 {
3427         __be32 *p;
3428
3429         *res = 60;
3430         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3431                 return -EIO;
3432         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3433                 p = xdr_inline_decode(xdr, 4);
3434                 if (unlikely(!p))
3435                         return -EIO;
3436                 *res = be32_to_cpup(p);
3437                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3438         }
3439         dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3440         return 0;
3441 }
3442
3443 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3444 {
3445         __be32 *p;
3446
3447         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3448                 return -EIO;
3449         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3450                 p = xdr_inline_decode(xdr, 4);
3451                 if (unlikely(!p))
3452                         return -EIO;
3453                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3454                 *res = -be32_to_cpup(p);
3455         }
3456         return 0;
3457 }
3458
3459 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3460                                  uint32_t *bitmap, uint32_t *bitmask)
3461 {
3462         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3463                 int ret;
3464                 ret = decode_attr_bitmap(xdr, bitmask);
3465                 if (unlikely(ret < 0))
3466                         return ret;
3467                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3468         } else
3469                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3470         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3471                 bitmask[0], bitmask[1], bitmask[2]);
3472         return 0;
3473 }
3474
3475 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3476 {
3477         __be32 *p;
3478         u32 len;
3479
3480         if (fh != NULL)
3481                 memset(fh, 0, sizeof(*fh));
3482
3483         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3484                 return -EIO;
3485         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3486                 p = xdr_inline_decode(xdr, 4);
3487                 if (unlikely(!p))
3488                         return -EIO;
3489                 len = be32_to_cpup(p);
3490                 if (len > NFS4_FHSIZE)
3491                         return -EIO;
3492                 p = xdr_inline_decode(xdr, len);
3493                 if (unlikely(!p))
3494                         return -EIO;
3495                 if (fh != NULL) {
3496                         memcpy(fh->data, p, len);
3497                         fh->size = len;
3498                 }
3499                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3500         }
3501         return 0;
3502 }
3503
3504 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3505 {
3506         __be32 *p;
3507
3508         *res = 0;
3509         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3510                 return -EIO;
3511         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3512                 p = xdr_inline_decode(xdr, 4);
3513                 if (unlikely(!p))
3514                         return -EIO;
3515                 *res = be32_to_cpup(p);
3516                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3517         }
3518         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3519         return 0;
3520 }
3521
3522 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3523 {
3524         __be32 *p;
3525         int ret = 0;
3526
3527         *fileid = 0;
3528         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3529                 return -EIO;
3530         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3531                 p = xdr_inline_decode(xdr, 8);
3532                 if (unlikely(!p))
3533                         return -EIO;
3534                 xdr_decode_hyper(p, fileid);
3535                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3536                 ret = NFS_ATTR_FATTR_FILEID;
3537         }
3538         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3539         return ret;
3540 }
3541
3542 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3543 {
3544         __be32 *p;
3545         int ret = 0;
3546
3547         *fileid = 0;
3548         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3549                 return -EIO;
3550         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3551                 p = xdr_inline_decode(xdr, 8);
3552                 if (unlikely(!p))
3553                         return -EIO;
3554                 xdr_decode_hyper(p, fileid);
3555                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3556                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3557         }
3558         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3559         return ret;
3560 }
3561
3562 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3563 {
3564         __be32 *p;
3565         int status = 0;
3566
3567         *res = 0;
3568         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3569                 return -EIO;
3570         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3571                 p = xdr_inline_decode(xdr, 8);
3572                 if (unlikely(!p))
3573                         return -EIO;
3574                 xdr_decode_hyper(p, res);
3575                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3576         }
3577         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3578         return status;
3579 }
3580
3581 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3582 {
3583         __be32 *p;
3584         int status = 0;
3585
3586         *res = 0;
3587         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3588                 return -EIO;
3589         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3590                 p = xdr_inline_decode(xdr, 8);
3591                 if (unlikely(!p))
3592                         return -EIO;
3593                 xdr_decode_hyper(p, res);
3594                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3595         }
3596         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3597         return status;
3598 }
3599
3600 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3601 {
3602         __be32 *p;
3603         int status = 0;
3604
3605         *res = 0;
3606         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3607                 return -EIO;
3608         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3609                 p = xdr_inline_decode(xdr, 8);
3610                 if (unlikely(!p))
3611                         return -EIO;
3612                 xdr_decode_hyper(p, res);
3613                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3614         }
3615         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3616         return status;
3617 }
3618
3619 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3620 {
3621         u32 n;
3622         __be32 *p;
3623         int status = 0;
3624
3625         p = xdr_inline_decode(xdr, 4);
3626         if (unlikely(!p))
3627                 return -EIO;
3628         n = be32_to_cpup(p);
3629         if (n == 0)
3630                 goto root_path;
3631         dprintk("pathname4: ");
3632         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3633                 dprintk("cannot parse %d components in path\n", n);
3634                 goto out_eio;
3635         }
3636         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3637                 struct nfs4_string *component = &path->components[path->ncomponents];
3638                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3639                 if (unlikely(status != 0))
3640                         goto out_eio;
3641                 ifdebug (XDR)
3642                         pr_cont("%s%.*s ",
3643                                 (path->ncomponents != n ? "/ " : ""),
3644                                 component->len, component->data);
3645         }
3646 out:
3647         return status;
3648 root_path:
3649 /* a root pathname is sent as a zero component4 */
3650         path->ncomponents = 1;
3651         path->components[0].len=0;
3652         path->components[0].data=NULL;
3653         dprintk("pathname4: /\n");
3654         goto out;
3655 out_eio:
3656         dprintk(" status %d", status);
3657         status = -EIO;
3658         goto out;
3659 }
3660
3661 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3662 {
3663         int n;
3664         __be32 *p;
3665         int status = -EIO;
3666
3667         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3668                 goto out;
3669         status = 0;
3670         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3671                 goto out;
3672         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3673         status = -EIO;
3674         /* Ignore borken servers that return unrequested attrs */
3675         if (unlikely(res == NULL))
3676                 goto out;
3677         dprintk("%s: fsroot:\n", __func__);
3678         status = decode_pathname(xdr, &res->fs_path);
3679         if (unlikely(status != 0))
3680                 goto out;
3681         p = xdr_inline_decode(xdr, 4);
3682         if (unlikely(!p))
3683                 goto out_eio;
3684         n = be32_to_cpup(p);
3685         if (n <= 0)
3686                 goto out_eio;
3687         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3688                 u32 m;
3689                 struct nfs4_fs_location *loc;
3690
3691                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3692                         break;
3693                 loc = &res->locations[res->nlocations];
3694                 p = xdr_inline_decode(xdr, 4);
3695                 if (unlikely(!p))
3696                         goto out_eio;
3697                 m = be32_to_cpup(p);
3698
3699                 dprintk("%s: servers:\n", __func__);
3700                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3701                         struct nfs4_string *server;
3702
3703                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3704                                 unsigned int i;
3705                                 dprintk("%s: using first %u of %u servers "
3706                                         "returned for location %u\n",
3707                                                 __func__,
3708                                                 NFS4_FS_LOCATION_MAXSERVERS,
3709                                                 m, res->nlocations);
3710                                 for (i = loc->nservers; i < m; i++) {
3711                                         unsigned int len;
3712                                         char *data;
3713                                         status = decode_opaque_inline(xdr, &len, &data);
3714                                         if (unlikely(status != 0))
3715                                                 goto out_eio;
3716                                 }
3717                                 break;
3718                         }
3719                         server = &loc->servers[loc->nservers];
3720                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3721                         if (unlikely(status != 0))
3722                                 goto out_eio;
3723                         dprintk("%s ", server->data);
3724                 }
3725                 status = decode_pathname(xdr, &loc->rootpath);
3726                 if (unlikely(status != 0))
3727                         goto out_eio;
3728         }
3729         if (res->nlocations != 0)
3730                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3731 out:
3732         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3733         return status;
3734 out_eio:
3735         status = -EIO;
3736         goto out;
3737 }
3738
3739 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3740 {
3741         __be32 *p;
3742         int status = 0;
3743
3744         *res = 0;
3745         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3746                 return -EIO;
3747         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3748                 p = xdr_inline_decode(xdr, 8);
3749                 if (unlikely(!p))
3750                         return -EIO;
3751                 xdr_decode_hyper(p, res);
3752                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3753         }
3754         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3755         return status;
3756 }
3757
3758 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3759 {
3760         __be32 *p;
3761         int status = 0;
3762
3763         *maxlink = 1;
3764         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3765                 return -EIO;
3766         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3767                 p = xdr_inline_decode(xdr, 4);
3768                 if (unlikely(!p))
3769                         return -EIO;
3770                 *maxlink = be32_to_cpup(p);
3771                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3772         }
3773         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3774         return status;
3775 }
3776
3777 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3778 {
3779         __be32 *p;
3780         int status = 0;
3781
3782         *maxname = 1024;
3783         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3784                 return -EIO;
3785         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3786                 p = xdr_inline_decode(xdr, 4);
3787                 if (unlikely(!p))
3788                         return -EIO;
3789                 *maxname = be32_to_cpup(p);
3790                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3791         }
3792         dprintk("%s: maxname=%u\n", __func__, *maxname);
3793         return status;
3794 }
3795
3796 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3797 {
3798         __be32 *p;
3799         int status = 0;
3800
3801         *res = 1024;
3802         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3803                 return -EIO;
3804         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3805                 uint64_t maxread;
3806                 p = xdr_inline_decode(xdr, 8);
3807                 if (unlikely(!p))
3808                         return -EIO;
3809                 xdr_decode_hyper(p, &maxread);
3810                 if (maxread > 0x7FFFFFFF)
3811                         maxread = 0x7FFFFFFF;
3812                 *res = (uint32_t)maxread;
3813                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3814         }
3815         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3816         return status;
3817 }
3818
3819 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820 {
3821         __be32 *p;
3822         int status = 0;
3823
3824         *res = 1024;
3825         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826                 return -EIO;
3827         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828                 uint64_t maxwrite;
3829                 p = xdr_inline_decode(xdr, 8);
3830                 if (unlikely(!p))
3831                         return -EIO;
3832                 xdr_decode_hyper(p, &maxwrite);
3833                 if (maxwrite > 0x7FFFFFFF)
3834                         maxwrite = 0x7FFFFFFF;
3835                 *res = (uint32_t)maxwrite;
3836                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837         }
3838         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839         return status;
3840 }
3841
3842 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3843 {
3844         uint32_t tmp;
3845         __be32 *p;
3846         int ret = 0;
3847
3848         *mode = 0;
3849         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3850                 return -EIO;
3851         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3852                 p = xdr_inline_decode(xdr, 4);
3853                 if (unlikely(!p))
3854                         return -EIO;
3855                 tmp = be32_to_cpup(p);
3856                 *mode = tmp & ~S_IFMT;
3857                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3858                 ret = NFS_ATTR_FATTR_MODE;
3859         }
3860         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3861         return ret;
3862 }
3863
3864 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3865 {
3866         __be32 *p;
3867         int ret = 0;
3868
3869         *nlink = 1;
3870         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3871                 return -EIO;
3872         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3873                 p = xdr_inline_decode(xdr, 4);
3874                 if (unlikely(!p))
3875                         return -EIO;
3876                 *nlink = be32_to_cpup(p);
3877                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3878                 ret = NFS_ATTR_FATTR_NLINK;
3879         }
3880         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3881         return ret;
3882 }
3883
3884 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3885                 struct nfs4_string *name, gfp_t gfp_flags)
3886 {
3887         ssize_t ret;
3888
3889         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3890                         XDR_MAX_NETOBJ, gfp_flags);
3891         name->len = 0;
3892         if (ret > 0)
3893                 name->len = ret;
3894         return ret;
3895 }
3896
3897 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3898                 const struct nfs_server *server, kuid_t *uid,
3899                 struct nfs4_string *owner_name)
3900 {
3901         ssize_t len;
3902         char *p;
3903
3904         *uid = make_kuid(&init_user_ns, -2);
3905         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3906                 return -EIO;
3907         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3908                 return 0;
3909         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3910
3911         if (owner_name != NULL) {
3912                 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3913                 if (len <= 0)
3914                         goto out;
3915                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3916                 return NFS_ATTR_FATTR_OWNER_NAME;
3917         } else {
3918                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3919                                 XDR_MAX_NETOBJ);
3920                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3921                         goto out;
3922                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3923                 return NFS_ATTR_FATTR_OWNER;
3924         }
3925 out:
3926         if (len == -EBADMSG)
3927                 return -EIO;
3928         return 0;
3929 }
3930
3931 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3932                 const struct nfs_server *server, kgid_t *gid,
3933                 struct nfs4_string *group_name)
3934 {
3935         ssize_t len;
3936         char *p;
3937
3938         *gid = make_kgid(&init_user_ns, -2);
3939         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3940                 return -EIO;
3941         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3942                 return 0;
3943         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3944
3945         if (group_name != NULL) {
3946                 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3947                 if (len <= 0)
3948                         goto out;
3949                 dprintk("%s: name=%s\n", __func__, group_name->data);
3950                 return NFS_ATTR_FATTR_GROUP_NAME;
3951         } else {
3952                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3953                                 XDR_MAX_NETOBJ);
3954                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3955                         goto out;
3956                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3957                 return NFS_ATTR_FATTR_GROUP;
3958         }
3959 out:
3960         if (len == -EBADMSG)
3961                 return -EIO;
3962         return 0;
3963 }
3964
3965 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3966 {
3967         uint32_t major = 0, minor = 0;
3968         __be32 *p;
3969         int ret = 0;
3970
3971         *rdev = MKDEV(0,0);
3972         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3973                 return -EIO;
3974         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3975                 dev_t tmp;
3976
3977                 p = xdr_inline_decode(xdr, 8);
3978                 if (unlikely(!p))
3979                         return -EIO;
3980                 major = be32_to_cpup(p++);
3981                 minor = be32_to_cpup(p);
3982                 tmp = MKDEV(major, minor);
3983                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3984                         *rdev = tmp;
3985                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3986                 ret = NFS_ATTR_FATTR_RDEV;
3987         }
3988         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3989         return ret;
3990 }
3991
3992 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3993 {
3994         __be32 *p;
3995         int status = 0;
3996
3997         *res = 0;
3998         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3999                 return -EIO;
4000         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4001                 p = xdr_inline_decode(xdr, 8);
4002                 if (unlikely(!p))
4003                         return -EIO;
4004                 xdr_decode_hyper(p, res);
4005                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4006         }
4007         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4008         return status;
4009 }
4010
4011 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4012 {
4013         __be32 *p;
4014         int status = 0;
4015
4016         *res = 0;
4017         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4018                 return -EIO;
4019         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4020                 p = xdr_inline_decode(xdr, 8);
4021                 if (unlikely(!p))
4022                         return -EIO;
4023                 xdr_decode_hyper(p, res);
4024                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4025         }
4026         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4027         return status;
4028 }
4029
4030 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031 {
4032         __be32 *p;
4033         int status = 0;
4034
4035         *res = 0;
4036         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4037                 return -EIO;
4038         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4039                 p = xdr_inline_decode(xdr, 8);
4040                 if (unlikely(!p))
4041                         return -EIO;
4042                 xdr_decode_hyper(p, res);
4043                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4044         }
4045         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4046         return status;
4047 }
4048
4049 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4050 {
4051         __be32 *p;
4052         int ret = 0;
4053
4054         *used = 0;
4055         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4056                 return -EIO;
4057         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4058                 p = xdr_inline_decode(xdr, 8);
4059                 if (unlikely(!p))
4060                         return -EIO;
4061                 xdr_decode_hyper(p, used);
4062                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4063                 ret = NFS_ATTR_FATTR_SPACE_USED;
4064         }
4065         dprintk("%s: space used=%Lu\n", __func__,
4066                         (unsigned long long)*used);
4067         return ret;
4068 }
4069
4070 static __be32 *
4071 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4072 {
4073         __u64 sec;
4074
4075         p = xdr_decode_hyper(p, &sec);
4076         t-> tv_sec = sec;
4077         t->tv_nsec = be32_to_cpup(p++);
4078         return p;
4079 }
4080
4081 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4082 {
4083         __be32 *p;
4084
4085         p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4086         if (unlikely(!p))
4087                 return -EIO;
4088         xdr_decode_nfstime4(p, time);
4089         return 0;
4090 }
4091
4092 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4093 {
4094         int status = 0;
4095
4096         time->tv_sec = 0;
4097         time->tv_nsec = 0;
4098         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4099                 return -EIO;
4100         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4101                 status = decode_attr_time(xdr, time);
4102                 if (status == 0)
4103                         status = NFS_ATTR_FATTR_ATIME;
4104                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4105         }
4106         dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4107         return status;
4108 }
4109
4110 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4111 {
4112         int status = 0;
4113
4114         time->tv_sec = 0;
4115         time->tv_nsec = 0;
4116         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4117                 return -EIO;
4118         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4119                 status = decode_attr_time(xdr, time);
4120                 if (status == 0)
4121                         status = NFS_ATTR_FATTR_CTIME;
4122                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4123         }
4124         dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4125         return status;
4126 }
4127
4128 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4129                                   struct timespec64 *time)
4130 {
4131         int status = 0;
4132
4133         time->tv_sec = 0;
4134         time->tv_nsec = 0;
4135         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4136                 return -EIO;
4137         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4138                 status = decode_attr_time(xdr, time);
4139                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4140         }
4141         dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4142                 time->tv_nsec);
4143         return status;
4144 }
4145
4146 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4147                                         struct nfs4_label *label)
4148 {
4149         uint32_t pi = 0;
4150         uint32_t lfs = 0;
4151         __u32 len;
4152         __be32 *p;
4153         int status = 0;
4154
4155         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4156                 return -EIO;
4157         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4158                 p = xdr_inline_decode(xdr, 4);
4159                 if (unlikely(!p))
4160                         return -EIO;
4161                 lfs = be32_to_cpup(p++);
4162                 p = xdr_inline_decode(xdr, 4);
4163                 if (unlikely(!p))
4164                         return -EIO;
4165                 pi = be32_to_cpup(p++);
4166                 p = xdr_inline_decode(xdr, 4);
4167                 if (unlikely(!p))
4168                         return -EIO;
4169                 len = be32_to_cpup(p++);
4170                 p = xdr_inline_decode(xdr, len);
4171                 if (unlikely(!p))
4172                         return -EIO;
4173                 if (len < NFS4_MAXLABELLEN) {
4174                         if (label) {
4175                                 if (label->len) {
4176                                         if (label->len < len)
4177                                                 return -ERANGE;
4178                                         memcpy(label->label, p, len);
4179                                 }
4180                                 label->len = len;
4181                                 label->pi = pi;
4182                                 label->lfs = lfs;
4183                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4184                         }
4185                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4186                 } else
4187                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4188                                         __func__, len);
4189         }
4190         if (label && label->label)
4191                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4192                         (char *)label->label, label->len, label->pi, label->lfs);
4193         return status;
4194 }
4195
4196 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4197 {
4198         int status = 0;
4199
4200         time->tv_sec = 0;
4201         time->tv_nsec = 0;
4202         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4203                 return -EIO;
4204         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4205                 status = decode_attr_time(xdr, time);
4206                 if (status == 0)
4207                         status = NFS_ATTR_FATTR_MTIME;
4208                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4209         }
4210         dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4211         return status;
4212 }
4213
4214 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4215                                     uint32_t *res)
4216 {
4217         __be32 *p;
4218
4219         *res = 0;
4220         if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4221                 return -EIO;
4222         if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4223                 p = xdr_inline_decode(xdr, 4);
4224                 if (unlikely(!p))
4225                         return -EIO;
4226                 *res = be32_to_cpup(p);
4227                 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4228         }
4229         dprintk("%s: XATTR support=%s\n", __func__,
4230                 *res == 0 ? "false" : "true");
4231         return 0;
4232 }
4233
4234 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4235 {
4236         unsigned int attrwords = XDR_QUADLEN(attrlen);
4237         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4238
4239         if (unlikely(attrwords != nwords)) {
4240                 dprintk("%s: server returned incorrect attribute length: "
4241                         "%u %c %u\n",
4242                                 __func__,
4243                                 attrwords << 2,
4244                                 (attrwords < nwords) ? '<' : '>',
4245                                 nwords << 2);
4246                 return -EIO;
4247         }
4248         return 0;
4249 }
4250
4251 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4252 {
4253         __be32 *p;
4254
4255         p = xdr_inline_decode(xdr, 20);
4256         if (unlikely(!p))
4257                 return -EIO;
4258         cinfo->atomic = be32_to_cpup(p++);
4259         p = xdr_decode_hyper(p, &cinfo->before);
4260         xdr_decode_hyper(p, &cinfo->after);
4261         return 0;
4262 }
4263
4264 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4265 {
4266         __be32 *p;
4267         uint32_t supp, acc;
4268         int status;
4269
4270         status = decode_op_hdr(xdr, OP_ACCESS);
4271         if (status)
4272                 return status;
4273         p = xdr_inline_decode(xdr, 8);
4274         if (unlikely(!p))
4275                 return -EIO;
4276         supp = be32_to_cpup(p++);
4277         acc = be32_to_cpup(p);
4278         *supported = supp;
4279         *access = acc;
4280         return 0;
4281 }
4282
4283 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4284 {
4285         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4286         if (unlikely(ret < 0))
4287                 return -EIO;
4288         return 0;
4289 }
4290
4291 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4292 {
4293         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4294 }
4295
4296 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4297 {
4298         stateid->type = NFS4_OPEN_STATEID_TYPE;
4299         return decode_stateid(xdr, stateid);
4300 }
4301
4302 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303 {
4304         stateid->type = NFS4_LOCK_STATEID_TYPE;
4305         return decode_stateid(xdr, stateid);
4306 }
4307
4308 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309 {
4310         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4311         return decode_stateid(xdr, stateid);
4312 }
4313
4314 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4315 {
4316         nfs4_stateid dummy;
4317
4318         nfs4_stateid_copy(stateid, &invalid_stateid);
4319         return decode_stateid(xdr, &dummy);
4320 }
4321
4322 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4323 {
4324         int status;
4325
4326         status = decode_op_hdr(xdr, OP_CLOSE);
4327         if (status != -EIO)
4328                 nfs_increment_open_seqid(status, res->seqid);
4329         if (!status)
4330                 status = decode_invalid_stateid(xdr, &res->stateid);
4331         return status;
4332 }
4333
4334 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4335 {
4336         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4337 }
4338
4339 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4340 {
4341         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4342 }
4343
4344 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4345 {
4346         struct nfs_writeverf *verf = res->verf;
4347         int status;
4348
4349         status = decode_op_hdr(xdr, OP_COMMIT);
4350         if (!status)
4351                 status = decode_write_verifier(xdr, &verf->verifier);
4352         if (!status)
4353                 verf->committed = NFS_FILE_SYNC;
4354         return status;
4355 }
4356
4357 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4358 {
4359         __be32 *p;
4360         uint32_t bmlen;
4361         int status;
4362
4363         status = decode_op_hdr(xdr, OP_CREATE);
4364         if (status)
4365                 return status;
4366         if ((status = decode_change_info(xdr, cinfo)))
4367                 return status;
4368         p = xdr_inline_decode(xdr, 4);
4369         if (unlikely(!p))
4370                 return -EIO;
4371         bmlen = be32_to_cpup(p);
4372         p = xdr_inline_decode(xdr, bmlen << 2);
4373         if (likely(p))
4374                 return 0;
4375         return -EIO;
4376 }
4377
4378 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4379 {
4380         unsigned int savep;
4381         uint32_t attrlen, bitmap[3] = {0};
4382         int status;
4383
4384         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4387                 goto xdr_error;
4388         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4389                 goto xdr_error;
4390         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4393                                                  &res->fh_expire_type)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4402                                 res->exclcreat_bitmask)) != 0)
4403                 goto xdr_error;
4404         status = verify_attr_len(xdr, savep, attrlen);
4405 xdr_error:
4406         dprintk("%s: xdr returned %d!\n", __func__, -status);
4407         return status;
4408 }
4409
4410 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4411 {
4412         unsigned int savep;
4413         uint32_t attrlen, bitmap[3] = {0};
4414         int status;
4415
4416         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4417                 goto xdr_error;
4418         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4419                 goto xdr_error;
4420         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4421                 goto xdr_error;
4422
4423         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4426                 goto xdr_error;
4427         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4428                 goto xdr_error;
4429
4430         status = -EIO;
4431         if (unlikely(bitmap[0]))
4432                 goto xdr_error;
4433
4434         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4435                 goto xdr_error;
4436         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4437                 goto xdr_error;
4438         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4439                 goto xdr_error;
4440
4441         status = verify_attr_len(xdr, savep, attrlen);
4442 xdr_error:
4443         dprintk("%s: xdr returned %d!\n", __func__, -status);
4444         return status;
4445 }
4446
4447 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4448 {
4449         unsigned int savep;
4450         uint32_t attrlen, bitmap[3] = {0};
4451         int status;
4452
4453         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4454                 goto xdr_error;
4455         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4456                 goto xdr_error;
4457         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4458                 goto xdr_error;
4459
4460         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4461                 goto xdr_error;
4462         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4463                 goto xdr_error;
4464
4465         status = verify_attr_len(xdr, savep, attrlen);
4466 xdr_error:
4467         dprintk("%s: xdr returned %d!\n", __func__, -status);
4468         return status;
4469 }
4470
4471 static int decode_threshold_hint(struct xdr_stream *xdr,
4472                                   uint32_t *bitmap,
4473                                   uint64_t *res,
4474                                   uint32_t hint_bit)
4475 {
4476         __be32 *p;
4477
4478         *res = 0;
4479         if (likely(bitmap[0] & hint_bit)) {
4480                 p = xdr_inline_decode(xdr, 8);
4481                 if (unlikely(!p))
4482                         return -EIO;
4483                 xdr_decode_hyper(p, res);
4484         }
4485         return 0;
4486 }
4487
4488 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4489                                         struct nfs4_threshold *res)
4490 {
4491         __be32 *p;
4492         unsigned int savep;
4493         uint32_t bitmap[3] = {0,}, attrlen;
4494         int status;
4495
4496         /* layout type */
4497         p = xdr_inline_decode(xdr, 4);
4498         if (unlikely(!p))
4499                 return -EIO;
4500         res->l_type = be32_to_cpup(p);
4501
4502         /* thi_hintset bitmap */
4503         status = decode_attr_bitmap(xdr, bitmap);
4504         if (status < 0)
4505                 goto xdr_error;
4506
4507         /* thi_hintlist length */
4508         status = decode_attr_length(xdr, &attrlen, &savep);
4509         if (status < 0)
4510                 goto xdr_error;
4511         /* thi_hintlist */
4512         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4513         if (status < 0)
4514                 goto xdr_error;
4515         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4516         if (status < 0)
4517                 goto xdr_error;
4518         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4519                                        THRESHOLD_RD_IO);
4520         if (status < 0)
4521                 goto xdr_error;
4522         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4523                                        THRESHOLD_WR_IO);
4524         if (status < 0)
4525                 goto xdr_error;
4526
4527         status = verify_attr_len(xdr, savep, attrlen);
4528         res->bm = bitmap[0];
4529
4530         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4531                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4532                 res->wr_io_sz);
4533 xdr_error:
4534         dprintk("%s ret=%d!\n", __func__, status);
4535         return status;
4536 }
4537
4538 /*
4539  * Thresholds on pNFS direct I/O vrs MDS I/O
4540  */
4541 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4542                                     uint32_t *bitmap,
4543                                     struct nfs4_threshold *res)
4544 {
4545         __be32 *p;
4546         int status = 0;
4547         uint32_t num;
4548
4549         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4550                 return -EIO;
4551         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4552                 /* Did the server return an unrequested attribute? */
4553                 if (unlikely(res == NULL))
4554                         return -EREMOTEIO;
4555                 p = xdr_inline_decode(xdr, 4);
4556                 if (unlikely(!p))
4557                         return -EIO;
4558                 num = be32_to_cpup(p);
4559                 if (num == 0)
4560                         return 0;
4561                 if (num > 1)
4562                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4563                                 "drivers per filesystem not supported\n",
4564                                 __func__);
4565
4566                 status = decode_first_threshold_item4(xdr, res);
4567                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4568         }
4569         return status;
4570 }
4571
4572 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4573                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4574                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4575                 const struct nfs_server *server)
4576 {
4577         int status;
4578         umode_t fmode = 0;
4579         uint32_t type;
4580         int32_t err;
4581
4582         status = decode_attr_type(xdr, bitmap, &type);
4583         if (status < 0)
4584                 goto xdr_error;
4585         fattr->mode = 0;
4586         if (status != 0) {
4587                 fattr->mode |= nfs_type2fmt[type];
4588                 fattr->valid |= status;
4589         }
4590
4591         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4592         if (status < 0)
4593                 goto xdr_error;
4594         fattr->valid |= status;
4595
4596         status = decode_attr_size(xdr, bitmap, &fattr->size);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->valid |= status;
4600
4601         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4602         if (status < 0)
4603                 goto xdr_error;
4604         fattr->valid |= status;
4605
4606         err = 0;
4607         status = decode_attr_error(xdr, bitmap, &err);
4608         if (status < 0)
4609                 goto xdr_error;
4610
4611         status = decode_attr_filehandle(xdr, bitmap, fh);
4612         if (status < 0)
4613                 goto xdr_error;
4614
4615         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4621         if (status < 0)
4622                 goto xdr_error;
4623         fattr->valid |= status;
4624
4625         status = -EIO;
4626         if (unlikely(bitmap[0]))
4627                 goto xdr_error;
4628
4629         status = decode_attr_mode(xdr, bitmap, &fmode);
4630         if (status < 0)
4631                 goto xdr_error;
4632         if (status != 0) {
4633                 fattr->mode |= fmode;
4634                 fattr->valid |= status;
4635         }
4636
4637         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4638         if (status < 0)
4639                 goto xdr_error;
4640         fattr->valid |= status;
4641
4642         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4643         if (status < 0)
4644                 goto xdr_error;
4645         fattr->valid |= status;
4646
4647         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4648         if (status < 0)
4649                 goto xdr_error;
4650         fattr->valid |= status;
4651
4652         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4653         if (status < 0)
4654                 goto xdr_error;
4655         fattr->valid |= status;
4656
4657         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4658         if (status < 0)
4659                 goto xdr_error;
4660         fattr->valid |= status;
4661
4662         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4663         if (status < 0)
4664                 goto xdr_error;
4665         fattr->valid |= status;
4666
4667         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4668         if (status < 0)
4669                 goto xdr_error;
4670         fattr->valid |= status;
4671
4672         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4673         if (status < 0)
4674                 goto xdr_error;
4675         fattr->valid |= status;
4676
4677         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4678         if (status < 0)
4679                 goto xdr_error;
4680         fattr->valid |= status;
4681
4682         status = -EIO;
4683         if (unlikely(bitmap[1]))
4684                 goto xdr_error;
4685
4686         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4687         if (status < 0)
4688                 goto xdr_error;
4689
4690         if (label) {
4691                 status = decode_attr_security_label(xdr, bitmap, label);
4692                 if (status < 0)
4693                         goto xdr_error;
4694                 fattr->valid |= status;
4695         }
4696
4697 xdr_error:
4698         dprintk("%s: xdr returned %d\n", __func__, -status);
4699         return status;
4700 }
4701
4702 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4703                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4704                 struct nfs4_label *label, const struct nfs_server *server)
4705 {
4706         unsigned int savep;
4707         uint32_t attrlen,
4708                  bitmap[3] = {0};
4709         int status;
4710
4711         status = decode_op_hdr(xdr, OP_GETATTR);
4712         if (status < 0)
4713                 goto xdr_error;
4714
4715         status = decode_attr_bitmap(xdr, bitmap);
4716         if (status < 0)
4717                 goto xdr_error;
4718
4719         status = decode_attr_length(xdr, &attrlen, &savep);
4720         if (status < 0)
4721                 goto xdr_error;
4722
4723         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4724                                         label, server);
4725         if (status < 0)
4726                 goto xdr_error;
4727
4728         status = verify_attr_len(xdr, savep, attrlen);
4729 xdr_error:
4730         dprintk("%s: xdr returned %d\n", __func__, -status);
4731         return status;
4732 }
4733
4734 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4735                 struct nfs4_label *label, const struct nfs_server *server)
4736 {
4737         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4738 }
4739
4740 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4741                 const struct nfs_server *server)
4742 {
4743         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4744 }
4745
4746 /*
4747  * Decode potentially multiple layout types.
4748  */
4749 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4750                                     struct nfs_fsinfo *fsinfo)
4751 {
4752         __be32 *p;
4753         uint32_t i;
4754
4755         p = xdr_inline_decode(xdr, 4);
4756         if (unlikely(!p))
4757                 return -EIO;
4758         fsinfo->nlayouttypes = be32_to_cpup(p);
4759
4760         /* pNFS is not supported by the underlying file system */
4761         if (fsinfo->nlayouttypes == 0)
4762                 return 0;
4763
4764         /* Decode and set first layout type, move xdr->p past unused types */
4765         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4766         if (unlikely(!p))
4767                 return -EIO;
4768
4769         /* If we get too many, then just cap it at the max */
4770         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4771                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4772                         __func__, fsinfo->nlayouttypes);
4773                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4774         }
4775
4776         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4777                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4778         return 0;
4779 }
4780
4781 /*
4782  * The type of file system exported.
4783  * Note we must ensure that layouttype is set in any non-error case.
4784  */
4785 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4786                                 struct nfs_fsinfo *fsinfo)
4787 {
4788         int status = 0;
4789
4790         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4791         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4792                 return -EIO;
4793         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4794                 status = decode_pnfs_layout_types(xdr, fsinfo);
4795                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4796         }
4797         return status;
4798 }
4799
4800 /*
4801  * The prefered block size for layout directed io
4802  */
4803 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4804                                       uint32_t *res)
4805 {
4806         __be32 *p;
4807
4808         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4809         *res = 0;
4810         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4811                 p = xdr_inline_decode(xdr, 4);
4812                 if (unlikely(!p))
4813                         return -EIO;
4814                 *res = be32_to_cpup(p);
4815                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4816         }
4817         return 0;
4818 }
4819
4820 /*
4821  * The granularity of a CLONE operation.
4822  */
4823 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4824                                      uint32_t *res)
4825 {
4826         __be32 *p;
4827
4828         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4829         *res = 0;
4830         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4831                 p = xdr_inline_decode(xdr, 4);
4832                 if (unlikely(!p))
4833                         return -EIO;
4834                 *res = be32_to_cpup(p);
4835                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4836         }
4837         return 0;
4838 }
4839
4840 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4841 {
4842         unsigned int savep;
4843         uint32_t attrlen, bitmap[3];
4844         int status;
4845
4846         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4847                 goto xdr_error;
4848         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4849                 goto xdr_error;
4850         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4851                 goto xdr_error;
4852
4853         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4854
4855         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4856                 goto xdr_error;
4857         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4858                 goto xdr_error;
4859         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4860                 goto xdr_error;
4861         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4862         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4863                 goto xdr_error;
4864         fsinfo->wtpref = fsinfo->wtmax;
4865
4866         status = -EIO;
4867         if (unlikely(bitmap[0]))
4868                 goto xdr_error;
4869
4870         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4871         if (status != 0)
4872                 goto xdr_error;
4873         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4874         if (status != 0)
4875                 goto xdr_error;
4876
4877         status = -EIO;
4878         if (unlikely(bitmap[1]))
4879                 goto xdr_error;
4880
4881         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4882         if (status)
4883                 goto xdr_error;
4884         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4885         if (status)
4886                 goto xdr_error;
4887
4888         status = decode_attr_xattrsupport(xdr, bitmap,
4889                                           &fsinfo->xattr_support);
4890         if (status)
4891                 goto xdr_error;
4892
4893         status = verify_attr_len(xdr, savep, attrlen);
4894 xdr_error:
4895         dprintk("%s: xdr returned %d!\n", __func__, -status);
4896         return status;
4897 }
4898
4899 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4900 {
4901         __be32 *p;
4902         uint32_t len;
4903         int status;
4904
4905         /* Zero handle first to allow comparisons */
4906         memset(fh, 0, sizeof(*fh));
4907
4908         status = decode_op_hdr(xdr, OP_GETFH);
4909         if (status)
4910                 return status;
4911
4912         p = xdr_inline_decode(xdr, 4);
4913         if (unlikely(!p))
4914                 return -EIO;
4915         len = be32_to_cpup(p);
4916         if (len > NFS4_FHSIZE)
4917                 return -EIO;
4918         fh->size = len;
4919         p = xdr_inline_decode(xdr, len);
4920         if (unlikely(!p))
4921                 return -EIO;
4922         memcpy(fh->data, p, len);
4923         return 0;
4924 }
4925
4926 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4927 {
4928         int status;
4929
4930         status = decode_op_hdr(xdr, OP_LINK);
4931         if (status)
4932                 return status;
4933         return decode_change_info(xdr, cinfo);
4934 }
4935
4936 /*
4937  * We create the owner, so we know a proper owner.id length is 4.
4938  */
4939 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4940 {
4941         uint64_t offset, length, clientid;
4942         __be32 *p;
4943         uint32_t namelen, type;
4944
4945         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4946         if (unlikely(!p))
4947                 return -EIO;
4948         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4949         p = xdr_decode_hyper(p, &length);
4950         type = be32_to_cpup(p++); /* 4 byte read */
4951         if (fl != NULL) { /* manipulate file lock */
4952                 fl->fl_start = (loff_t)offset;
4953                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4954                 if (length == ~(uint64_t)0)
4955                         fl->fl_end = OFFSET_MAX;
4956                 fl->fl_type = F_WRLCK;
4957                 if (type & 1)
4958                         fl->fl_type = F_RDLCK;
4959                 fl->fl_pid = 0;
4960         }
4961         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4962         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4963         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4964         if (likely(!p))
4965                 return -EIO;
4966         return -NFS4ERR_DENIED;
4967 }
4968
4969 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4970 {
4971         int status;
4972
4973         status = decode_op_hdr(xdr, OP_LOCK);
4974         if (status == -EIO)
4975                 goto out;
4976         if (status == 0) {
4977                 status = decode_lock_stateid(xdr, &res->stateid);
4978                 if (unlikely(status))
4979                         goto out;
4980         } else if (status == -NFS4ERR_DENIED)
4981                 status = decode_lock_denied(xdr, NULL);
4982         if (res->open_seqid != NULL)
4983                 nfs_increment_open_seqid(status, res->open_seqid);
4984         nfs_increment_lock_seqid(status, res->lock_seqid);
4985 out:
4986         return status;
4987 }
4988
4989 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4990 {
4991         int status;
4992         status = decode_op_hdr(xdr, OP_LOCKT);
4993         if (status == -NFS4ERR_DENIED)
4994                 return decode_lock_denied(xdr, res->denied);
4995         return status;
4996 }
4997
4998 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4999 {
5000         int status;
5001
5002         status = decode_op_hdr(xdr, OP_LOCKU);
5003         if (status != -EIO)
5004                 nfs_increment_lock_seqid(status, res->seqid);
5005         if (status == 0)
5006                 status = decode_lock_stateid(xdr, &res->stateid);
5007         return status;
5008 }
5009
5010 static int decode_release_lockowner(struct xdr_stream *xdr)
5011 {
5012         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5013 }
5014
5015 static int decode_lookup(struct xdr_stream *xdr)
5016 {
5017         return decode_op_hdr(xdr, OP_LOOKUP);
5018 }
5019
5020 static int decode_lookupp(struct xdr_stream *xdr)
5021 {
5022         return decode_op_hdr(xdr, OP_LOOKUPP);
5023 }
5024
5025 /* This is too sick! */
5026 static int decode_space_limit(struct xdr_stream *xdr,
5027                 unsigned long *pagemod_limit)
5028 {
5029         __be32 *p;
5030         uint32_t limit_type, nblocks, blocksize;
5031         u64 maxsize = 0;
5032
5033         p = xdr_inline_decode(xdr, 12);
5034         if (unlikely(!p))
5035                 return -EIO;
5036         limit_type = be32_to_cpup(p++);
5037         switch (limit_type) {
5038         case NFS4_LIMIT_SIZE:
5039                 xdr_decode_hyper(p, &maxsize);
5040                 break;
5041         case NFS4_LIMIT_BLOCKS:
5042                 nblocks = be32_to_cpup(p++);
5043                 blocksize = be32_to_cpup(p);
5044                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5045         }
5046         maxsize >>= PAGE_SHIFT;
5047         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5048         return 0;
5049 }
5050
5051 static int decode_rw_delegation(struct xdr_stream *xdr,
5052                 uint32_t delegation_type,
5053                 struct nfs_openres *res)
5054 {
5055         __be32 *p;
5056         int status;
5057
5058         status = decode_delegation_stateid(xdr, &res->delegation);
5059         if (unlikely(status))
5060                 return status;
5061         p = xdr_inline_decode(xdr, 4);
5062         if (unlikely(!p))
5063                 return -EIO;
5064         res->do_recall = be32_to_cpup(p);
5065
5066         switch (delegation_type) {
5067         case NFS4_OPEN_DELEGATE_READ:
5068                 res->delegation_type = FMODE_READ;
5069                 break;
5070         case NFS4_OPEN_DELEGATE_WRITE:
5071                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5072                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5073                                 return -EIO;
5074         }
5075         return decode_ace(xdr, NULL);
5076 }
5077
5078 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5079 {
5080         __be32 *p;
5081         uint32_t why_no_delegation;
5082
5083         p = xdr_inline_decode(xdr, 4);
5084         if (unlikely(!p))
5085                 return -EIO;
5086         why_no_delegation = be32_to_cpup(p);
5087         switch (why_no_delegation) {
5088                 case WND4_CONTENTION:
5089                 case WND4_RESOURCE:
5090                         xdr_inline_decode(xdr, 4);
5091                         /* Ignore for now */
5092         }
5093         return 0;
5094 }
5095
5096 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5097 {
5098         __be32 *p;
5099         uint32_t delegation_type;
5100
5101         p = xdr_inline_decode(xdr, 4);
5102         if (unlikely(!p))
5103                 return -EIO;
5104         delegation_type = be32_to_cpup(p);
5105         res->delegation_type = 0;
5106         switch (delegation_type) {
5107         case NFS4_OPEN_DELEGATE_NONE:
5108                 return 0;
5109         case NFS4_OPEN_DELEGATE_READ:
5110         case NFS4_OPEN_DELEGATE_WRITE:
5111                 return decode_rw_delegation(xdr, delegation_type, res);
5112         case NFS4_OPEN_DELEGATE_NONE_EXT:
5113                 return decode_no_delegation(xdr, res);
5114         }
5115         return -EIO;
5116 }
5117
5118 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5119 {
5120         __be32 *p;
5121         uint32_t savewords, bmlen, i;
5122         int status;
5123
5124         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5125                 return status;
5126         nfs_increment_open_seqid(status, res->seqid);
5127         if (status)
5128                 return status;
5129         status = decode_open_stateid(xdr, &res->stateid);
5130         if (unlikely(status))
5131                 return status;
5132
5133         decode_change_info(xdr, &res->cinfo);
5134
5135         p = xdr_inline_decode(xdr, 8);
5136         if (unlikely(!p))
5137                 return -EIO;
5138         res->rflags = be32_to_cpup(p++);
5139         bmlen = be32_to_cpup(p);
5140         if (bmlen > 10)
5141                 goto xdr_error;
5142
5143         p = xdr_inline_decode(xdr, bmlen << 2);
5144         if (unlikely(!p))
5145                 return -EIO;
5146         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5147         for (i = 0; i < savewords; ++i)
5148                 res->attrset[i] = be32_to_cpup(p++);
5149         for (; i < NFS4_BITMAP_SIZE; i++)
5150                 res->attrset[i] = 0;
5151
5152         return decode_delegation(xdr, res);
5153 xdr_error:
5154         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5155         return -EIO;
5156 }
5157
5158 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5159 {
5160         int status;
5161
5162         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5163         if (status != -EIO)
5164                 nfs_increment_open_seqid(status, res->seqid);
5165         if (!status)
5166                 status = decode_open_stateid(xdr, &res->stateid);
5167         return status;
5168 }
5169
5170 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5171 {
5172         int status;
5173
5174         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5175         if (status != -EIO)
5176                 nfs_increment_open_seqid(status, res->seqid);
5177         if (!status)
5178                 status = decode_open_stateid(xdr, &res->stateid);
5179         return status;
5180 }
5181
5182 static int decode_putfh(struct xdr_stream *xdr)
5183 {
5184         return decode_op_hdr(xdr, OP_PUTFH);
5185 }
5186
5187 static int decode_putrootfh(struct xdr_stream *xdr)
5188 {
5189         return decode_op_hdr(xdr, OP_PUTROOTFH);
5190 }
5191
5192 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5193                        struct nfs_pgio_res *res)
5194 {
5195         __be32 *p;
5196         uint32_t count, eof, recvd;
5197         int status;
5198
5199         status = decode_op_hdr(xdr, OP_READ);
5200         if (status)
5201                 return status;
5202         p = xdr_inline_decode(xdr, 8);
5203         if (unlikely(!p))
5204                 return -EIO;
5205         eof = be32_to_cpup(p++);
5206         count = be32_to_cpup(p);
5207         recvd = xdr_read_pages(xdr, count);
5208         if (count > recvd) {
5209                 dprintk("NFS: server cheating in read reply: "
5210                                 "count %u > recvd %u\n", count, recvd);
5211                 count = recvd;
5212                 eof = 0;
5213         }
5214         res->eof = eof;
5215         res->count = count;
5216         return 0;
5217 }
5218
5219 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5220 {
5221         int             status;
5222         __be32          verf[2];
5223
5224         status = decode_op_hdr(xdr, OP_READDIR);
5225         if (!status)
5226                 status = decode_verifier(xdr, readdir->verifier.data);
5227         if (unlikely(status))
5228                 return status;
5229         memcpy(verf, readdir->verifier.data, sizeof(verf));
5230         dprintk("%s: verifier = %08x:%08x\n",
5231                         __func__, verf[0], verf[1]);
5232         return xdr_read_pages(xdr, xdr->buf->page_len);
5233 }
5234
5235 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5236 {
5237         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5238         u32 len, recvd;
5239         __be32 *p;
5240         int status;
5241
5242         status = decode_op_hdr(xdr, OP_READLINK);
5243         if (status)
5244                 return status;
5245
5246         /* Convert length of symlink */
5247         p = xdr_inline_decode(xdr, 4);
5248         if (unlikely(!p))
5249                 return -EIO;
5250         len = be32_to_cpup(p);
5251         if (len >= rcvbuf->page_len || len <= 0) {
5252                 dprintk("nfs: server returned giant symlink!\n");
5253                 return -ENAMETOOLONG;
5254         }
5255         recvd = xdr_read_pages(xdr, len);
5256         if (recvd < len) {
5257                 dprintk("NFS: server cheating in readlink reply: "
5258                                 "count %u > recvd %u\n", len, recvd);
5259                 return -EIO;
5260         }
5261         /*
5262          * The XDR encode routine has set things up so that
5263          * the link text will be copied directly into the
5264          * buffer.  We just have to do overflow-checking,
5265          * and null-terminate the text (the VFS expects
5266          * null-termination).
5267          */
5268         xdr_terminate_string(rcvbuf, len);
5269         return 0;
5270 }
5271
5272 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5273 {
5274         int status;
5275
5276         status = decode_op_hdr(xdr, OP_REMOVE);
5277         if (status)
5278                 goto out;
5279         status = decode_change_info(xdr, cinfo);
5280 out:
5281         return status;
5282 }
5283
5284 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5285               struct nfs4_change_info *new_cinfo)
5286 {
5287         int status;
5288
5289         status = decode_op_hdr(xdr, OP_RENAME);
5290         if (status)
5291                 goto out;
5292         if ((status = decode_change_info(xdr, old_cinfo)))
5293                 goto out;
5294         status = decode_change_info(xdr, new_cinfo);
5295 out:
5296         return status;
5297 }
5298
5299 static int decode_renew(struct xdr_stream *xdr)
5300 {
5301         return decode_op_hdr(xdr, OP_RENEW);
5302 }
5303
5304 static int
5305 decode_restorefh(struct xdr_stream *xdr)
5306 {
5307         return decode_op_hdr(xdr, OP_RESTOREFH);
5308 }
5309
5310 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5311                          struct nfs_getaclres *res)
5312 {
5313         unsigned int savep;
5314         uint32_t attrlen,
5315                  bitmap[3] = {0};
5316         int status;
5317
5318         res->acl_len = 0;
5319         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5320                 goto out;
5321
5322         xdr_enter_page(xdr, xdr->buf->page_len);
5323
5324         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5325                 goto out;
5326         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5327                 goto out;
5328
5329         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5330                 return -EIO;
5331         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5332
5333                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5334                  * are stored with the acl data to handle the problem of
5335                  * variable length bitmaps.*/
5336                 res->acl_data_offset = xdr_page_pos(xdr);
5337                 res->acl_len = attrlen;
5338
5339                 /* Check for receive buffer overflow */
5340                 if (res->acl_len > xdr_stream_remaining(xdr) ||
5341                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5342                         res->acl_flags |= NFS4_ACL_TRUNC;
5343                         dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5344                                 attrlen, xdr_stream_remaining(xdr));
5345                 }
5346         } else
5347                 status = -EOPNOTSUPP;
5348
5349 out:
5350         return status;
5351 }
5352
5353 static int
5354 decode_savefh(struct xdr_stream *xdr)
5355 {
5356         return decode_op_hdr(xdr, OP_SAVEFH);
5357 }
5358
5359 static int decode_setattr(struct xdr_stream *xdr)
5360 {
5361         int status;
5362
5363         status = decode_op_hdr(xdr, OP_SETATTR);
5364         if (status)
5365                 return status;
5366         if (decode_bitmap4(xdr, NULL, 0) >= 0)
5367                 return 0;
5368         return -EIO;
5369 }
5370
5371 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5372 {
5373         __be32 *p;
5374         uint32_t opnum;
5375         int32_t nfserr;
5376
5377         p = xdr_inline_decode(xdr, 8);
5378         if (unlikely(!p))
5379                 return -EIO;
5380         opnum = be32_to_cpup(p++);
5381         if (opnum != OP_SETCLIENTID) {
5382                 dprintk("nfs: decode_setclientid: Server returned operation"
5383                         " %d\n", opnum);
5384                 return -EIO;
5385         }
5386         nfserr = be32_to_cpup(p);
5387         if (nfserr == NFS_OK) {
5388                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5389                 if (unlikely(!p))
5390                         return -EIO;
5391                 p = xdr_decode_hyper(p, &res->clientid);
5392                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5393         } else if (nfserr == NFSERR_CLID_INUSE) {
5394                 uint32_t len;
5395
5396                 /* skip netid string */
5397                 p = xdr_inline_decode(xdr, 4);
5398                 if (unlikely(!p))
5399                         return -EIO;
5400                 len = be32_to_cpup(p);
5401                 p = xdr_inline_decode(xdr, len);
5402                 if (unlikely(!p))
5403                         return -EIO;
5404
5405                 /* skip uaddr string */
5406                 p = xdr_inline_decode(xdr, 4);
5407                 if (unlikely(!p))
5408                         return -EIO;
5409                 len = be32_to_cpup(p);
5410                 p = xdr_inline_decode(xdr, len);
5411                 if (unlikely(!p))
5412                         return -EIO;
5413                 return -NFSERR_CLID_INUSE;
5414         } else
5415                 return nfs4_stat_to_errno(nfserr);
5416
5417         return 0;
5418 }
5419
5420 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5421 {
5422         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5423 }
5424
5425 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5426 {
5427         __be32 *p;
5428         int status;
5429
5430         status = decode_op_hdr(xdr, OP_WRITE);
5431         if (status)
5432                 return status;
5433
5434         p = xdr_inline_decode(xdr, 8);
5435         if (unlikely(!p))
5436                 return -EIO;
5437         res->count = be32_to_cpup(p++);
5438         res->verf->committed = be32_to_cpup(p++);
5439         return decode_write_verifier(xdr, &res->verf->verifier);
5440 }
5441
5442 static int decode_delegreturn(struct xdr_stream *xdr)
5443 {
5444         return decode_op_hdr(xdr, OP_DELEGRETURN);
5445 }
5446
5447 static int decode_secinfo_gss(struct xdr_stream *xdr,
5448                               struct nfs4_secinfo4 *flavor)
5449 {
5450         u32 oid_len;
5451         __be32 *p;
5452
5453         p = xdr_inline_decode(xdr, 4);
5454         if (unlikely(!p))
5455                 return -EIO;
5456         oid_len = be32_to_cpup(p);
5457         if (oid_len > GSS_OID_MAX_LEN)
5458                 return -EINVAL;
5459
5460         p = xdr_inline_decode(xdr, oid_len);
5461         if (unlikely(!p))
5462                 return -EIO;
5463         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5464         flavor->flavor_info.oid.len = oid_len;
5465
5466         p = xdr_inline_decode(xdr, 8);
5467         if (unlikely(!p))
5468                 return -EIO;
5469         flavor->flavor_info.qop = be32_to_cpup(p++);
5470         flavor->flavor_info.service = be32_to_cpup(p);
5471
5472         return 0;
5473 }
5474
5475 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5476 {
5477         struct nfs4_secinfo4 *sec_flavor;
5478         unsigned int i, num_flavors;
5479         int status;
5480         __be32 *p;
5481
5482         p = xdr_inline_decode(xdr, 4);
5483         if (unlikely(!p))
5484                 return -EIO;
5485
5486         res->flavors->num_flavors = 0;
5487         num_flavors = be32_to_cpup(p);
5488
5489         for (i = 0; i < num_flavors; i++) {
5490                 sec_flavor = &res->flavors->flavors[i];
5491                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5492                         break;
5493
5494                 p = xdr_inline_decode(xdr, 4);
5495                 if (unlikely(!p))
5496                         return -EIO;
5497                 sec_flavor->flavor = be32_to_cpup(p);
5498
5499                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5500                         status = decode_secinfo_gss(xdr, sec_flavor);
5501                         if (status)
5502                                 goto out;
5503                 }
5504                 res->flavors->num_flavors++;
5505         }
5506
5507         status = 0;
5508 out:
5509         return status;
5510 }
5511
5512 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5513 {
5514         int status = decode_op_hdr(xdr, OP_SECINFO);
5515         if (status)
5516                 return status;
5517         return decode_secinfo_common(xdr, res);
5518 }
5519
5520 #if defined(CONFIG_NFS_V4_1)
5521 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5522 {
5523         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5524         if (status)
5525                 return status;
5526         return decode_secinfo_common(xdr, res);
5527 }
5528
5529 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5530 {
5531         __be32 *p;
5532         uint32_t bitmap_words;
5533         unsigned int i;
5534
5535         p = xdr_inline_decode(xdr, 4);
5536         if (!p)
5537                 return -EIO;
5538         bitmap_words = be32_to_cpup(p++);
5539         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5540                 return -EIO;
5541         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5542         for (i = 0; i < bitmap_words; i++)
5543                 op_map->u.words[i] = be32_to_cpup(p++);
5544
5545         return 0;
5546 }
5547
5548 static int decode_exchange_id(struct xdr_stream *xdr,
5549                               struct nfs41_exchange_id_res *res)
5550 {
5551         __be32 *p;
5552         uint32_t dummy;
5553         char *dummy_str;
5554         int status;
5555         uint32_t impl_id_count;
5556
5557         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5558         if (status)
5559                 return status;
5560
5561         p = xdr_inline_decode(xdr, 8);
5562         if (unlikely(!p))
5563                 return -EIO;
5564         xdr_decode_hyper(p, &res->clientid);
5565         p = xdr_inline_decode(xdr, 12);
5566         if (unlikely(!p))
5567                 return -EIO;
5568         res->seqid = be32_to_cpup(p++);
5569         res->flags = be32_to_cpup(p++);
5570
5571         res->state_protect.how = be32_to_cpup(p);
5572         switch (res->state_protect.how) {
5573         case SP4_NONE:
5574                 break;
5575         case SP4_MACH_CRED:
5576                 status = decode_op_map(xdr, &res->state_protect.enforce);
5577                 if (status)
5578                         return status;
5579                 status = decode_op_map(xdr, &res->state_protect.allow);
5580                 if (status)
5581                         return status;
5582                 break;
5583         default:
5584                 WARN_ON_ONCE(1);
5585                 return -EIO;
5586         }
5587
5588         /* server_owner4.so_minor_id */
5589         p = xdr_inline_decode(xdr, 8);
5590         if (unlikely(!p))
5591                 return -EIO;
5592         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5593
5594         /* server_owner4.so_major_id */
5595         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5596         if (unlikely(status))
5597                 return status;
5598         memcpy(res->server_owner->major_id, dummy_str, dummy);
5599         res->server_owner->major_id_sz = dummy;
5600
5601         /* server_scope4 */
5602         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5603         if (unlikely(status))
5604                 return status;
5605         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5606         res->server_scope->server_scope_sz = dummy;
5607
5608         /* Implementation Id */
5609         p = xdr_inline_decode(xdr, 4);
5610         if (unlikely(!p))
5611                 return -EIO;
5612         impl_id_count = be32_to_cpup(p++);
5613
5614         if (impl_id_count) {
5615                 /* nii_domain */
5616                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5617                 if (unlikely(status))
5618                         return status;
5619                 memcpy(res->impl_id->domain, dummy_str, dummy);
5620
5621                 /* nii_name */
5622                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5623                 if (unlikely(status))
5624                         return status;
5625                 memcpy(res->impl_id->name, dummy_str, dummy);
5626
5627                 /* nii_date */
5628                 p = xdr_inline_decode(xdr, 12);
5629                 if (unlikely(!p))
5630                         return -EIO;
5631                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5632                 res->impl_id->date.nseconds = be32_to_cpup(p);
5633
5634                 /* if there's more than one entry, ignore the rest */
5635         }
5636         return 0;
5637 }
5638
5639 static int decode_chan_attrs(struct xdr_stream *xdr,
5640                              struct nfs4_channel_attrs *attrs)
5641 {
5642         __be32 *p;
5643         u32 nr_attrs, val;
5644
5645         p = xdr_inline_decode(xdr, 28);
5646         if (unlikely(!p))
5647                 return -EIO;
5648         val = be32_to_cpup(p++);        /* headerpadsz */
5649         if (val)
5650                 return -EINVAL;         /* no support for header padding yet */
5651         attrs->max_rqst_sz = be32_to_cpup(p++);
5652         attrs->max_resp_sz = be32_to_cpup(p++);
5653         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5654         attrs->max_ops = be32_to_cpup(p++);
5655         attrs->max_reqs = be32_to_cpup(p++);
5656         nr_attrs = be32_to_cpup(p);
5657         if (unlikely(nr_attrs > 1)) {
5658                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5659                         "count %u\n", __func__, nr_attrs);
5660                 return -EINVAL;
5661         }
5662         if (nr_attrs == 1) {
5663                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5664                 if (unlikely(!p))
5665                         return -EIO;
5666         }
5667         return 0;
5668 }
5669
5670 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5671 {
5672         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5673 }
5674
5675 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5676                                 struct nfs41_bind_conn_to_session_res *res)
5677 {
5678         __be32 *p;
5679         int status;
5680
5681         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5682         if (!status)
5683                 status = decode_sessionid(xdr, &res->sessionid);
5684         if (unlikely(status))
5685                 return status;
5686
5687         /* dir flags, rdma mode bool */
5688         p = xdr_inline_decode(xdr, 8);
5689         if (unlikely(!p))
5690                 return -EIO;
5691
5692         res->dir = be32_to_cpup(p++);
5693         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5694                 return -EIO;
5695         if (be32_to_cpup(p) == 0)
5696                 res->use_conn_in_rdma_mode = false;
5697         else
5698                 res->use_conn_in_rdma_mode = true;
5699
5700         return 0;
5701 }
5702
5703 static int decode_create_session(struct xdr_stream *xdr,
5704                                  struct nfs41_create_session_res *res)
5705 {
5706         __be32 *p;
5707         int status;
5708
5709         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5710         if (!status)
5711                 status = decode_sessionid(xdr, &res->sessionid);
5712         if (unlikely(status))
5713                 return status;
5714
5715         /* seqid, flags */
5716         p = xdr_inline_decode(xdr, 8);
5717         if (unlikely(!p))
5718                 return -EIO;
5719         res->seqid = be32_to_cpup(p++);
5720         res->flags = be32_to_cpup(p);
5721
5722         /* Channel attributes */
5723         status = decode_chan_attrs(xdr, &res->fc_attrs);
5724         if (!status)
5725                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5726         return status;
5727 }
5728
5729 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5730 {
5731         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5732 }
5733
5734 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5735 {
5736         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5737 }
5738
5739 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5740 {
5741         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5742 }
5743 #endif /* CONFIG_NFS_V4_1 */
5744
5745 static int decode_sequence(struct xdr_stream *xdr,
5746                            struct nfs4_sequence_res *res,
5747                            struct rpc_rqst *rqstp)
5748 {
5749 #if defined(CONFIG_NFS_V4_1)
5750         struct nfs4_session *session;
5751         struct nfs4_sessionid id;
5752         u32 dummy;
5753         int status;
5754         __be32 *p;
5755
5756         if (res->sr_slot == NULL)
5757                 return 0;
5758         if (!res->sr_slot->table->session)
5759                 return 0;
5760
5761         status = decode_op_hdr(xdr, OP_SEQUENCE);
5762         if (!status)
5763                 status = decode_sessionid(xdr, &id);
5764         if (unlikely(status))
5765                 goto out_err;
5766
5767         /*
5768          * If the server returns different values for sessionID, slotID or
5769          * sequence number, the server is looney tunes.
5770          */
5771         status = -EREMOTEIO;
5772         session = res->sr_slot->table->session;
5773
5774         if (memcmp(id.data, session->sess_id.data,
5775                    NFS4_MAX_SESSIONID_LEN)) {
5776                 dprintk("%s Invalid session id\n", __func__);
5777                 goto out_err;
5778         }
5779
5780         p = xdr_inline_decode(xdr, 20);
5781         if (unlikely(!p))
5782                 goto out_overflow;
5783
5784         /* seqid */
5785         dummy = be32_to_cpup(p++);
5786         if (dummy != res->sr_slot->seq_nr) {
5787                 dprintk("%s Invalid sequence number\n", __func__);
5788                 goto out_err;
5789         }
5790         /* slot id */
5791         dummy = be32_to_cpup(p++);
5792         if (dummy != res->sr_slot->slot_nr) {
5793                 dprintk("%s Invalid slot id\n", __func__);
5794                 goto out_err;
5795         }
5796         /* highest slot id */
5797         res->sr_highest_slotid = be32_to_cpup(p++);
5798         /* target highest slot id */
5799         res->sr_target_highest_slotid = be32_to_cpup(p++);
5800         /* result flags */
5801         res->sr_status_flags = be32_to_cpup(p);
5802         status = 0;
5803 out_err:
5804         res->sr_status = status;
5805         return status;
5806 out_overflow:
5807         status = -EIO;
5808         goto out_err;
5809 #else  /* CONFIG_NFS_V4_1 */
5810         return 0;
5811 #endif /* CONFIG_NFS_V4_1 */
5812 }
5813
5814 #if defined(CONFIG_NFS_V4_1)
5815 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5816 {
5817         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5818         return decode_stateid(xdr, stateid);
5819 }
5820
5821 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5822                                 struct nfs4_getdeviceinfo_res *res)
5823 {
5824         struct pnfs_device *pdev = res->pdev;
5825         __be32 *p;
5826         uint32_t len, type;
5827         int status;
5828
5829         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5830         if (status) {
5831                 if (status == -ETOOSMALL) {
5832                         p = xdr_inline_decode(xdr, 4);
5833                         if (unlikely(!p))
5834                                 return -EIO;
5835                         pdev->mincount = be32_to_cpup(p);
5836                         dprintk("%s: Min count too small. mincnt = %u\n",
5837                                 __func__, pdev->mincount);
5838                 }
5839                 return status;
5840         }
5841
5842         p = xdr_inline_decode(xdr, 8);
5843         if (unlikely(!p))
5844                 return -EIO;
5845         type = be32_to_cpup(p++);
5846         if (type != pdev->layout_type) {
5847                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5848                         __func__, pdev->layout_type, type);
5849                 return -EINVAL;
5850         }
5851         /*
5852          * Get the length of the opaque device_addr4. xdr_read_pages places
5853          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5854          * and places the remaining xdr data in xdr_buf->tail
5855          */
5856         pdev->mincount = be32_to_cpup(p);
5857         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5858                 return -EIO;
5859
5860         /* Parse notification bitmap, verifying that it is zero. */
5861         p = xdr_inline_decode(xdr, 4);
5862         if (unlikely(!p))
5863                 return -EIO;
5864         len = be32_to_cpup(p);
5865         if (len) {
5866                 uint32_t i;
5867
5868                 p = xdr_inline_decode(xdr, 4 * len);
5869                 if (unlikely(!p))
5870                         return -EIO;
5871
5872                 res->notification = be32_to_cpup(p++);
5873                 for (i = 1; i < len; i++) {
5874                         if (be32_to_cpup(p++)) {
5875                                 dprintk("%s: unsupported notification\n",
5876                                         __func__);
5877                                 return -EIO;
5878                         }
5879                 }
5880         }
5881         return 0;
5882 }
5883
5884 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5885                             struct nfs4_layoutget_res *res)
5886 {
5887         __be32 *p;
5888         int status;
5889         u32 layout_count;
5890         u32 recvd;
5891
5892         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5893         if (status)
5894                 goto out;
5895         p = xdr_inline_decode(xdr, 4);
5896         if (unlikely(!p))
5897                 goto out_overflow;
5898         res->return_on_close = be32_to_cpup(p);
5899         decode_layout_stateid(xdr, &res->stateid);
5900         p = xdr_inline_decode(xdr, 4);
5901         if (unlikely(!p))
5902                 goto out_overflow;
5903         layout_count = be32_to_cpup(p);
5904         if (!layout_count) {
5905                 dprintk("%s: server responded with empty layout array\n",
5906                         __func__);
5907                 status = -EINVAL;
5908                 goto out;
5909         }
5910
5911         p = xdr_inline_decode(xdr, 28);
5912         if (unlikely(!p))
5913                 goto out_overflow;
5914         p = xdr_decode_hyper(p, &res->range.offset);
5915         p = xdr_decode_hyper(p, &res->range.length);
5916         res->range.iomode = be32_to_cpup(p++);
5917         res->type = be32_to_cpup(p++);
5918         res->layoutp->len = be32_to_cpup(p);
5919
5920         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5921                 __func__,
5922                 (unsigned long)res->range.offset,
5923                 (unsigned long)res->range.length,
5924                 res->range.iomode,
5925                 res->type,
5926                 res->layoutp->len);
5927
5928         recvd = xdr_read_pages(xdr, res->layoutp->len);
5929         if (res->layoutp->len > recvd) {
5930                 dprintk("NFS: server cheating in layoutget reply: "
5931                                 "layout len %u > recvd %u\n",
5932                                 res->layoutp->len, recvd);
5933                 status = -EINVAL;
5934                 goto out;
5935         }
5936
5937         if (layout_count > 1) {
5938                 /* We only handle a length one array at the moment.  Any
5939                  * further entries are just ignored.  Note that this means
5940                  * the client may see a response that is less than the
5941                  * minimum it requested.
5942                  */
5943                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5944                         __func__, layout_count);
5945         }
5946
5947 out:
5948         res->status = status;
5949         return status;
5950 out_overflow:
5951         status = -EIO;
5952         goto out;
5953 }
5954
5955 static int decode_layoutreturn(struct xdr_stream *xdr,
5956                                struct nfs4_layoutreturn_res *res)
5957 {
5958         __be32 *p;
5959         int status;
5960
5961         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5962         if (status)
5963                 return status;
5964         p = xdr_inline_decode(xdr, 4);
5965         if (unlikely(!p))
5966                 return -EIO;
5967         res->lrs_present = be32_to_cpup(p);
5968         if (res->lrs_present)
5969                 status = decode_layout_stateid(xdr, &res->stateid);
5970         else
5971                 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5972         return status;
5973 }
5974
5975 static int decode_layoutcommit(struct xdr_stream *xdr,
5976                                struct rpc_rqst *req,
5977                                struct nfs4_layoutcommit_res *res)
5978 {
5979         __be32 *p;
5980         __u32 sizechanged;
5981         int status;
5982
5983         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5984         res->status = status;
5985         if (status)
5986                 return status;
5987
5988         p = xdr_inline_decode(xdr, 4);
5989         if (unlikely(!p))
5990                 return -EIO;
5991         sizechanged = be32_to_cpup(p);
5992
5993         if (sizechanged) {
5994                 /* throw away new size */
5995                 p = xdr_inline_decode(xdr, 8);
5996                 if (unlikely(!p))
5997                         return -EIO;
5998         }
5999         return 0;
6000 }
6001
6002 static int decode_test_stateid(struct xdr_stream *xdr,
6003                                struct nfs41_test_stateid_res *res)
6004 {
6005         __be32 *p;
6006         int status;
6007         int num_res;
6008
6009         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6010         if (status)
6011                 return status;
6012
6013         p = xdr_inline_decode(xdr, 4);
6014         if (unlikely(!p))
6015                 return -EIO;
6016         num_res = be32_to_cpup(p++);
6017         if (num_res != 1)
6018                 return -EIO;
6019
6020         p = xdr_inline_decode(xdr, 4);
6021         if (unlikely(!p))
6022                 return -EIO;
6023         res->status = be32_to_cpup(p++);
6024
6025         return status;
6026 }
6027
6028 static int decode_free_stateid(struct xdr_stream *xdr,
6029                                struct nfs41_free_stateid_res *res)
6030 {
6031         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6032         return res->status;
6033 }
6034 #else
6035 static inline
6036 int decode_layoutreturn(struct xdr_stream *xdr,
6037                                struct nfs4_layoutreturn_res *res)
6038 {
6039         return 0;
6040 }
6041
6042 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6043                             struct nfs4_layoutget_res *res)
6044 {
6045         return 0;
6046 }
6047
6048 #endif /* CONFIG_NFS_V4_1 */
6049
6050 /*
6051  * END OF "GENERIC" DECODE ROUTINES.
6052  */
6053
6054 /*
6055  * Decode OPEN_DOWNGRADE response
6056  */
6057 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6058                                        struct xdr_stream *xdr,
6059                                        void *data)
6060 {
6061         struct nfs_closeres *res = data;
6062         struct compound_hdr hdr;
6063         int status;
6064
6065         status = decode_compound_hdr(xdr, &hdr);
6066         if (status)
6067                 goto out;
6068         status = decode_sequence(xdr, &res->seq_res, rqstp);
6069         if (status)
6070                 goto out;
6071         status = decode_putfh(xdr);
6072         if (status)
6073                 goto out;
6074         if (res->lr_res) {
6075                 status = decode_layoutreturn(xdr, res->lr_res);
6076                 res->lr_ret = status;
6077                 if (status)
6078                         goto out;
6079         }
6080         status = decode_open_downgrade(xdr, res);
6081 out:
6082         return status;
6083 }
6084
6085 /*
6086  * Decode ACCESS response
6087  */
6088 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6089                                void *data)
6090 {
6091         struct nfs4_accessres *res = data;
6092         struct compound_hdr hdr;
6093         int status;
6094
6095         status = decode_compound_hdr(xdr, &hdr);
6096         if (status)
6097                 goto out;
6098         status = decode_sequence(xdr, &res->seq_res, rqstp);
6099         if (status)
6100                 goto out;
6101         status = decode_putfh(xdr);
6102         if (status != 0)
6103                 goto out;
6104         status = decode_access(xdr, &res->supported, &res->access);
6105         if (status != 0)
6106                 goto out;
6107         if (res->fattr)
6108                 decode_getfattr(xdr, res->fattr, res->server);
6109 out:
6110         return status;
6111 }
6112
6113 /*
6114  * Decode LOOKUP response
6115  */
6116 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6117                                void *data)
6118 {
6119         struct nfs4_lookup_res *res = data;
6120         struct compound_hdr hdr;
6121         int status;
6122
6123         status = decode_compound_hdr(xdr, &hdr);
6124         if (status)
6125                 goto out;
6126         status = decode_sequence(xdr, &res->seq_res, rqstp);
6127         if (status)
6128                 goto out;
6129         status = decode_putfh(xdr);
6130         if (status)
6131                 goto out;
6132         status = decode_lookup(xdr);
6133         if (status)
6134                 goto out;
6135         status = decode_getfh(xdr, res->fh);
6136         if (status)
6137                 goto out;
6138         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6139 out:
6140         return status;
6141 }
6142
6143 /*
6144  * Decode LOOKUPP response
6145  */
6146 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6147                 void *data)
6148 {
6149         struct nfs4_lookupp_res *res = data;
6150         struct compound_hdr hdr;
6151         int status;
6152
6153         status = decode_compound_hdr(xdr, &hdr);
6154         if (status)
6155                 goto out;
6156         status = decode_sequence(xdr, &res->seq_res, rqstp);
6157         if (status)
6158                 goto out;
6159         status = decode_putfh(xdr);
6160         if (status)
6161                 goto out;
6162         status = decode_lookupp(xdr);
6163         if (status)
6164                 goto out;
6165         status = decode_getfh(xdr, res->fh);
6166         if (status)
6167                 goto out;
6168         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6169 out:
6170         return status;
6171 }
6172
6173 /*
6174  * Decode LOOKUP_ROOT response
6175  */
6176 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6177                                     struct xdr_stream *xdr,
6178                                     void *data)
6179 {
6180         struct nfs4_lookup_res *res = data;
6181         struct compound_hdr hdr;
6182         int status;
6183
6184         status = decode_compound_hdr(xdr, &hdr);
6185         if (status)
6186                 goto out;
6187         status = decode_sequence(xdr, &res->seq_res, rqstp);
6188         if (status)
6189                 goto out;
6190         status = decode_putrootfh(xdr);
6191         if (status)
6192                 goto out;
6193         status = decode_getfh(xdr, res->fh);
6194         if (status == 0)
6195                 status = decode_getfattr_label(xdr, res->fattr,
6196                                                 res->label, res->server);
6197 out:
6198         return status;
6199 }
6200
6201 /*
6202  * Decode REMOVE response
6203  */
6204 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6205                                void *data)
6206 {
6207         struct nfs_removeres *res = data;
6208         struct compound_hdr hdr;
6209         int status;
6210
6211         status = decode_compound_hdr(xdr, &hdr);
6212         if (status)
6213                 goto out;
6214         status = decode_sequence(xdr, &res->seq_res, rqstp);
6215         if (status)
6216                 goto out;
6217         status = decode_putfh(xdr);
6218         if (status)
6219                 goto out;
6220         status = decode_remove(xdr, &res->cinfo);
6221 out:
6222         return status;
6223 }
6224
6225 /*
6226  * Decode RENAME response
6227  */
6228 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6229                                void *data)
6230 {
6231         struct nfs_renameres *res = data;
6232         struct compound_hdr hdr;
6233         int status;
6234
6235         status = decode_compound_hdr(xdr, &hdr);
6236         if (status)
6237                 goto out;
6238         status = decode_sequence(xdr, &res->seq_res, rqstp);
6239         if (status)
6240                 goto out;
6241         status = decode_putfh(xdr);
6242         if (status)
6243                 goto out;
6244         status = decode_savefh(xdr);
6245         if (status)
6246                 goto out;
6247         status = decode_putfh(xdr);
6248         if (status)
6249                 goto out;
6250         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6251 out:
6252         return status;
6253 }
6254
6255 /*
6256  * Decode LINK response
6257  */
6258 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6259                              void *data)
6260 {
6261         struct nfs4_link_res *res = data;
6262         struct compound_hdr hdr;
6263         int status;
6264
6265         status = decode_compound_hdr(xdr, &hdr);
6266         if (status)
6267                 goto out;
6268         status = decode_sequence(xdr, &res->seq_res, rqstp);
6269         if (status)
6270                 goto out;
6271         status = decode_putfh(xdr);
6272         if (status)
6273                 goto out;
6274         status = decode_savefh(xdr);
6275         if (status)
6276                 goto out;
6277         status = decode_putfh(xdr);
6278         if (status)
6279                 goto out;
6280         status = decode_link(xdr, &res->cinfo);
6281         if (status)
6282                 goto out;
6283         /*
6284          * Note order: OP_LINK leaves the directory as the current
6285          *             filehandle.
6286          */
6287         status = decode_restorefh(xdr);
6288         if (status)
6289                 goto out;
6290         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6291 out:
6292         return status;
6293 }
6294
6295 /*
6296  * Decode CREATE response
6297  */
6298 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299                                void *data)
6300 {
6301         struct nfs4_create_res *res = data;
6302         struct compound_hdr hdr;
6303         int status;
6304
6305         status = decode_compound_hdr(xdr, &hdr);
6306         if (status)
6307                 goto out;
6308         status = decode_sequence(xdr, &res->seq_res, rqstp);
6309         if (status)
6310                 goto out;
6311         status = decode_putfh(xdr);
6312         if (status)
6313                 goto out;
6314         status = decode_create(xdr, &res->dir_cinfo);
6315         if (status)
6316                 goto out;
6317         status = decode_getfh(xdr, res->fh);
6318         if (status)
6319                 goto out;
6320         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6321 out:
6322         return status;
6323 }
6324
6325 /*
6326  * Decode SYMLINK response
6327  */
6328 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329                                 void *res)
6330 {
6331         return nfs4_xdr_dec_create(rqstp, xdr, res);
6332 }
6333
6334 /*
6335  * Decode GETATTR response
6336  */
6337 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6338                                 void *data)
6339 {
6340         struct nfs4_getattr_res *res = data;
6341         struct compound_hdr hdr;
6342         int status;
6343
6344         status = decode_compound_hdr(xdr, &hdr);
6345         if (status)
6346                 goto out;
6347         status = decode_sequence(xdr, &res->seq_res, rqstp);
6348         if (status)
6349                 goto out;
6350         status = decode_putfh(xdr);
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  * Encode an SETACL request
6360  */
6361 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6362                                 const void *data)
6363 {
6364         const struct nfs_setaclargs *args = data;
6365         struct compound_hdr hdr = {
6366                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6367         };
6368
6369         encode_compound_hdr(xdr, req, &hdr);
6370         encode_sequence(xdr, &args->seq_args, &hdr);
6371         encode_putfh(xdr, args->fh, &hdr);
6372         encode_setacl(xdr, args, &hdr);
6373         encode_nops(&hdr);
6374 }
6375
6376 /*
6377  * Decode SETACL response
6378  */
6379 static int
6380 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6381                     void *data)
6382 {
6383         struct nfs_setaclres *res = data;
6384         struct compound_hdr hdr;
6385         int status;
6386
6387         status = decode_compound_hdr(xdr, &hdr);
6388         if (status)
6389                 goto out;
6390         status = decode_sequence(xdr, &res->seq_res, rqstp);
6391         if (status)
6392                 goto out;
6393         status = decode_putfh(xdr);
6394         if (status)
6395                 goto out;
6396         status = decode_setattr(xdr);
6397 out:
6398         return status;
6399 }
6400
6401 /*
6402  * Decode GETACL response
6403  */
6404 static int
6405 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406                     void *data)
6407 {
6408         struct nfs_getaclres *res = data;
6409         struct compound_hdr hdr;
6410         int status;
6411
6412         if (res->acl_scratch != NULL)
6413                 xdr_set_scratch_page(xdr, res->acl_scratch);
6414         status = decode_compound_hdr(xdr, &hdr);
6415         if (status)
6416                 goto out;
6417         status = decode_sequence(xdr, &res->seq_res, rqstp);
6418         if (status)
6419                 goto out;
6420         status = decode_putfh(xdr);
6421         if (status)
6422                 goto out;
6423         status = decode_getacl(xdr, rqstp, res);
6424
6425 out:
6426         return status;
6427 }
6428
6429 /*
6430  * Decode CLOSE response
6431  */
6432 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433                               void *data)
6434 {
6435         struct nfs_closeres *res = data;
6436         struct compound_hdr hdr;
6437         int status;
6438
6439         status = decode_compound_hdr(xdr, &hdr);
6440         if (status)
6441                 goto out;
6442         status = decode_sequence(xdr, &res->seq_res, rqstp);
6443         if (status)
6444                 goto out;
6445         status = decode_putfh(xdr);
6446         if (status)
6447                 goto out;
6448         if (res->lr_res) {
6449                 status = decode_layoutreturn(xdr, res->lr_res);
6450                 res->lr_ret = status;
6451                 if (status)
6452                         goto out;
6453         }
6454         if (res->fattr != NULL) {
6455                 status = decode_getfattr(xdr, res->fattr, res->server);
6456                 if (status != 0)
6457                         goto out;
6458         }
6459         status = decode_close(xdr, res);
6460 out:
6461         return status;
6462 }
6463
6464 /*
6465  * Decode OPEN response
6466  */
6467 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468                              void *data)
6469 {
6470         struct nfs_openres *res = data;
6471         struct compound_hdr hdr;
6472         int status;
6473
6474         status = decode_compound_hdr(xdr, &hdr);
6475         if (status)
6476                 goto out;
6477         status = decode_sequence(xdr, &res->seq_res, rqstp);
6478         if (status)
6479                 goto out;
6480         status = decode_putfh(xdr);
6481         if (status)
6482                 goto out;
6483         status = decode_open(xdr, res);
6484         if (status)
6485                 goto out;
6486         status = decode_getfh(xdr, &res->fh);
6487         if (status)
6488                 goto out;
6489         if (res->access_request)
6490                 decode_access(xdr, &res->access_supported, &res->access_result);
6491         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6492         if (res->lg_res)
6493                 decode_layoutget(xdr, rqstp, res->lg_res);
6494 out:
6495         return status;
6496 }
6497
6498 /*
6499  * Decode OPEN_CONFIRM response
6500  */
6501 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502                                      struct xdr_stream *xdr,
6503                                      void *data)
6504 {
6505         struct nfs_open_confirmres *res = data;
6506         struct compound_hdr hdr;
6507         int status;
6508
6509         status = decode_compound_hdr(xdr, &hdr);
6510         if (status)
6511                 goto out;
6512         status = decode_putfh(xdr);
6513         if (status)
6514                 goto out;
6515         status = decode_open_confirm(xdr, res);
6516 out:
6517         return status;
6518 }
6519
6520 /*
6521  * Decode OPEN response
6522  */
6523 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6524                                     struct xdr_stream *xdr,
6525                                     void *data)
6526 {
6527         struct nfs_openres *res = data;
6528         struct compound_hdr hdr;
6529         int status;
6530
6531         status = decode_compound_hdr(xdr, &hdr);
6532         if (status)
6533                 goto out;
6534         status = decode_sequence(xdr, &res->seq_res, rqstp);
6535         if (status)
6536                 goto out;
6537         status = decode_putfh(xdr);
6538         if (status)
6539                 goto out;
6540         status = decode_open(xdr, res);
6541         if (status)
6542                 goto out;
6543         if (res->access_request)
6544                 decode_access(xdr, &res->access_supported, &res->access_result);
6545         decode_getfattr(xdr, res->f_attr, res->server);
6546         if (res->lg_res)
6547                 decode_layoutget(xdr, rqstp, res->lg_res);
6548 out:
6549         return status;
6550 }
6551
6552 /*
6553  * Decode SETATTR response
6554  */
6555 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6556                                 struct xdr_stream *xdr,
6557                                 void *data)
6558 {
6559         struct nfs_setattrres *res = data;
6560         struct compound_hdr hdr;
6561         int status;
6562
6563         status = decode_compound_hdr(xdr, &hdr);
6564         if (status)
6565                 goto out;
6566         status = decode_sequence(xdr, &res->seq_res, rqstp);
6567         if (status)
6568                 goto out;
6569         status = decode_putfh(xdr);
6570         if (status)
6571                 goto out;
6572         status = decode_setattr(xdr);
6573         if (status)
6574                 goto out;
6575         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6576 out:
6577         return status;
6578 }
6579
6580 /*
6581  * Decode LOCK response
6582  */
6583 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584                              void *data)
6585 {
6586         struct nfs_lock_res *res = data;
6587         struct compound_hdr hdr;
6588         int status;
6589
6590         status = decode_compound_hdr(xdr, &hdr);
6591         if (status)
6592                 goto out;
6593         status = decode_sequence(xdr, &res->seq_res, rqstp);
6594         if (status)
6595                 goto out;
6596         status = decode_putfh(xdr);
6597         if (status)
6598                 goto out;
6599         status = decode_lock(xdr, res);
6600 out:
6601         return status;
6602 }
6603
6604 /*
6605  * Decode LOCKT response
6606  */
6607 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6608                               void *data)
6609 {
6610         struct nfs_lockt_res *res = data;
6611         struct compound_hdr hdr;
6612         int status;
6613
6614         status = decode_compound_hdr(xdr, &hdr);
6615         if (status)
6616                 goto out;
6617         status = decode_sequence(xdr, &res->seq_res, rqstp);
6618         if (status)
6619                 goto out;
6620         status = decode_putfh(xdr);
6621         if (status)
6622                 goto out;
6623         status = decode_lockt(xdr, res);
6624 out:
6625         return status;
6626 }
6627
6628 /*
6629  * Decode LOCKU response
6630  */
6631 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6632                               void *data)
6633 {
6634         struct nfs_locku_res *res = data;
6635         struct compound_hdr hdr;
6636         int status;
6637
6638         status = decode_compound_hdr(xdr, &hdr);
6639         if (status)
6640                 goto out;
6641         status = decode_sequence(xdr, &res->seq_res, rqstp);
6642         if (status)
6643                 goto out;
6644         status = decode_putfh(xdr);
6645         if (status)
6646                 goto out;
6647         status = decode_locku(xdr, res);
6648 out:
6649         return status;
6650 }
6651
6652 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6653                                           struct xdr_stream *xdr, void *dummy)
6654 {
6655         struct compound_hdr hdr;
6656         int status;
6657
6658         status = decode_compound_hdr(xdr, &hdr);
6659         if (!status)
6660                 status = decode_release_lockowner(xdr);
6661         return status;
6662 }
6663
6664 /*
6665  * Decode READLINK response
6666  */
6667 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6668                                  struct xdr_stream *xdr,
6669                                  void *data)
6670 {
6671         struct nfs4_readlink_res *res = data;
6672         struct compound_hdr hdr;
6673         int status;
6674
6675         status = decode_compound_hdr(xdr, &hdr);
6676         if (status)
6677                 goto out;
6678         status = decode_sequence(xdr, &res->seq_res, rqstp);
6679         if (status)
6680                 goto out;
6681         status = decode_putfh(xdr);
6682         if (status)
6683                 goto out;
6684         status = decode_readlink(xdr, rqstp);
6685 out:
6686         return status;
6687 }
6688
6689 /*
6690  * Decode READDIR response
6691  */
6692 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693                                 void *data)
6694 {
6695         struct nfs4_readdir_res *res = data;
6696         struct compound_hdr hdr;
6697         int status;
6698
6699         status = decode_compound_hdr(xdr, &hdr);
6700         if (status)
6701                 goto out;
6702         status = decode_sequence(xdr, &res->seq_res, rqstp);
6703         if (status)
6704                 goto out;
6705         status = decode_putfh(xdr);
6706         if (status)
6707                 goto out;
6708         status = decode_readdir(xdr, rqstp, res);
6709 out:
6710         return status;
6711 }
6712
6713 /*
6714  * Decode Read response
6715  */
6716 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717                              void *data)
6718 {
6719         struct nfs_pgio_res *res = data;
6720         struct compound_hdr hdr;
6721         int status;
6722
6723         status = decode_compound_hdr(xdr, &hdr);
6724         res->op_status = hdr.status;
6725         if (status)
6726                 goto out;
6727         status = decode_sequence(xdr, &res->seq_res, rqstp);
6728         if (status)
6729                 goto out;
6730         status = decode_putfh(xdr);
6731         if (status)
6732                 goto out;
6733         status = decode_read(xdr, rqstp, res);
6734         if (!status)
6735                 status = res->count;
6736 out:
6737         return status;
6738 }
6739
6740 /*
6741  * Decode WRITE response
6742  */
6743 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6744                               void *data)
6745 {
6746         struct nfs_pgio_res *res = data;
6747         struct compound_hdr hdr;
6748         int status;
6749
6750         status = decode_compound_hdr(xdr, &hdr);
6751         res->op_status = hdr.status;
6752         if (status)
6753                 goto out;
6754         status = decode_sequence(xdr, &res->seq_res, rqstp);
6755         if (status)
6756                 goto out;
6757         status = decode_putfh(xdr);
6758         if (status)
6759                 goto out;
6760         status = decode_write(xdr, res);
6761         if (status)
6762                 goto out;
6763         if (res->fattr)
6764                 decode_getfattr(xdr, res->fattr, res->server);
6765         if (!status)
6766                 status = res->count;
6767 out:
6768         return status;
6769 }
6770
6771 /*
6772  * Decode COMMIT response
6773  */
6774 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775                                void *data)
6776 {
6777         struct nfs_commitres *res = data;
6778         struct compound_hdr hdr;
6779         int status;
6780
6781         status = decode_compound_hdr(xdr, &hdr);
6782         res->op_status = hdr.status;
6783         if (status)
6784                 goto out;
6785         status = decode_sequence(xdr, &res->seq_res, rqstp);
6786         if (status)
6787                 goto out;
6788         status = decode_putfh(xdr);
6789         if (status)
6790                 goto out;
6791         status = decode_commit(xdr, res);
6792 out:
6793         return status;
6794 }
6795
6796 /*
6797  * Decode FSINFO response
6798  */
6799 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6800                                void *data)
6801 {
6802         struct nfs4_fsinfo_res *res = data;
6803         struct compound_hdr hdr;
6804         int status;
6805
6806         status = decode_compound_hdr(xdr, &hdr);
6807         if (!status)
6808                 status = decode_sequence(xdr, &res->seq_res, req);
6809         if (!status)
6810                 status = decode_putfh(xdr);
6811         if (!status)
6812                 status = decode_fsinfo(xdr, res->fsinfo);
6813         return status;
6814 }
6815
6816 /*
6817  * Decode PATHCONF response
6818  */
6819 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6820                                  void *data)
6821 {
6822         struct nfs4_pathconf_res *res = data;
6823         struct compound_hdr hdr;
6824         int status;
6825
6826         status = decode_compound_hdr(xdr, &hdr);
6827         if (!status)
6828                 status = decode_sequence(xdr, &res->seq_res, req);
6829         if (!status)
6830                 status = decode_putfh(xdr);
6831         if (!status)
6832                 status = decode_pathconf(xdr, res->pathconf);
6833         return status;
6834 }
6835
6836 /*
6837  * Decode STATFS response
6838  */
6839 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6840                                void *data)
6841 {
6842         struct nfs4_statfs_res *res = data;
6843         struct compound_hdr hdr;
6844         int status;
6845
6846         status = decode_compound_hdr(xdr, &hdr);
6847         if (!status)
6848                 status = decode_sequence(xdr, &res->seq_res, req);
6849         if (!status)
6850                 status = decode_putfh(xdr);
6851         if (!status)
6852                 status = decode_statfs(xdr, res->fsstat);
6853         return status;
6854 }
6855
6856 /*
6857  * Decode GETATTR_BITMAP response
6858  */
6859 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6860                                     struct xdr_stream *xdr,
6861                                     void *data)
6862 {
6863         struct nfs4_server_caps_res *res = data;
6864         struct compound_hdr hdr;
6865         int status;
6866
6867         status = decode_compound_hdr(xdr, &hdr);
6868         if (status)
6869                 goto out;
6870         status = decode_sequence(xdr, &res->seq_res, req);
6871         if (status)
6872                 goto out;
6873         status = decode_putfh(xdr);
6874         if (status)
6875                 goto out;
6876         status = decode_server_caps(xdr, res);
6877 out:
6878         return status;
6879 }
6880
6881 /*
6882  * Decode RENEW response
6883  */
6884 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885                               void *__unused)
6886 {
6887         struct compound_hdr hdr;
6888         int status;
6889
6890         status = decode_compound_hdr(xdr, &hdr);
6891         if (!status)
6892                 status = decode_renew(xdr);
6893         return status;
6894 }
6895
6896 /*
6897  * Decode SETCLIENTID response
6898  */
6899 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6900                                     struct xdr_stream *xdr,
6901                                     void *data)
6902 {
6903         struct nfs4_setclientid_res *res = data;
6904         struct compound_hdr hdr;
6905         int status;
6906
6907         status = decode_compound_hdr(xdr, &hdr);
6908         if (!status)
6909                 status = decode_setclientid(xdr, res);
6910         return status;
6911 }
6912
6913 /*
6914  * Decode SETCLIENTID_CONFIRM response
6915  */
6916 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6917                                             struct xdr_stream *xdr,
6918                                             void *data)
6919 {
6920         struct compound_hdr hdr;
6921         int status;
6922
6923         status = decode_compound_hdr(xdr, &hdr);
6924         if (!status)
6925                 status = decode_setclientid_confirm(xdr);
6926         return status;
6927 }
6928
6929 /*
6930  * Decode DELEGRETURN response
6931  */
6932 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6933                                     struct xdr_stream *xdr,
6934                                     void *data)
6935 {
6936         struct nfs4_delegreturnres *res = data;
6937         struct compound_hdr hdr;
6938         int status;
6939
6940         status = decode_compound_hdr(xdr, &hdr);
6941         if (status)
6942                 goto out;
6943         status = decode_sequence(xdr, &res->seq_res, rqstp);
6944         if (status)
6945                 goto out;
6946         status = decode_putfh(xdr);
6947         if (status != 0)
6948                 goto out;
6949         if (res->lr_res) {
6950                 status = decode_layoutreturn(xdr, res->lr_res);
6951                 res->lr_ret = status;
6952                 if (status)
6953                         goto out;
6954         }
6955         if (res->fattr) {
6956                 status = decode_getfattr(xdr, res->fattr, res->server);
6957                 if (status != 0)
6958                         goto out;
6959         }
6960         status = decode_delegreturn(xdr);
6961 out:
6962         return status;
6963 }
6964
6965 /*
6966  * Decode FS_LOCATIONS response
6967  */
6968 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6969                                      struct xdr_stream *xdr,
6970                                      void *data)
6971 {
6972         struct nfs4_fs_locations_res *res = data;
6973         struct compound_hdr hdr;
6974         int status;
6975
6976         status = decode_compound_hdr(xdr, &hdr);
6977         if (status)
6978                 goto out;
6979         status = decode_sequence(xdr, &res->seq_res, req);
6980         if (status)
6981                 goto out;
6982         status = decode_putfh(xdr);
6983         if (status)
6984                 goto out;
6985         if (res->migration) {
6986                 xdr_enter_page(xdr, PAGE_SIZE);
6987                 status = decode_getfattr_generic(xdr,
6988                                         &res->fs_locations->fattr,
6989                                          NULL, res->fs_locations,
6990                                          NULL, res->fs_locations->server);
6991                 if (status)
6992                         goto out;
6993                 if (res->renew)
6994                         status = decode_renew(xdr);
6995         } else {
6996                 status = decode_lookup(xdr);
6997                 if (status)
6998                         goto out;
6999                 xdr_enter_page(xdr, PAGE_SIZE);
7000                 status = decode_getfattr_generic(xdr,
7001                                         &res->fs_locations->fattr,
7002                                          NULL, res->fs_locations,
7003                                          NULL, res->fs_locations->server);
7004         }
7005 out:
7006         return status;
7007 }
7008
7009 /*
7010  * Decode SECINFO response
7011  */
7012 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7013                                 struct xdr_stream *xdr,
7014                                 void *data)
7015 {
7016         struct nfs4_secinfo_res *res = data;
7017         struct compound_hdr hdr;
7018         int status;
7019
7020         status = decode_compound_hdr(xdr, &hdr);
7021         if (status)
7022                 goto out;
7023         status = decode_sequence(xdr, &res->seq_res, rqstp);
7024         if (status)
7025                 goto out;
7026         status = decode_putfh(xdr);
7027         if (status)
7028                 goto out;
7029         status = decode_secinfo(xdr, res);
7030 out:
7031         return status;
7032 }
7033
7034 /*
7035  * Decode FSID_PRESENT response
7036  */
7037 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7038                                      struct xdr_stream *xdr,
7039                                      void *data)
7040 {
7041         struct nfs4_fsid_present_res *res = data;
7042         struct compound_hdr hdr;
7043         int status;
7044
7045         status = decode_compound_hdr(xdr, &hdr);
7046         if (status)
7047                 goto out;
7048         status = decode_sequence(xdr, &res->seq_res, rqstp);
7049         if (status)
7050                 goto out;
7051         status = decode_putfh(xdr);
7052         if (status)
7053                 goto out;
7054         status = decode_getfh(xdr, res->fh);
7055         if (status)
7056                 goto out;
7057         if (res->renew)
7058                 status = decode_renew(xdr);
7059 out:
7060         return status;
7061 }
7062
7063 #if defined(CONFIG_NFS_V4_1)
7064 /*
7065  * Decode BIND_CONN_TO_SESSION response
7066  */
7067 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7068                                         struct xdr_stream *xdr,
7069                                         void *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_bind_conn_to_session(xdr, res);
7077         return status;
7078 }
7079
7080 /*
7081  * Decode EXCHANGE_ID response
7082  */
7083 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7084                                     struct xdr_stream *xdr,
7085                                     void *res)
7086 {
7087         struct compound_hdr hdr;
7088         int status;
7089
7090         status = decode_compound_hdr(xdr, &hdr);
7091         if (!status)
7092                 status = decode_exchange_id(xdr, res);
7093         return status;
7094 }
7095
7096 /*
7097  * Decode CREATE_SESSION response
7098  */
7099 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7100                                        struct xdr_stream *xdr,
7101                                        void *res)
7102 {
7103         struct compound_hdr hdr;
7104         int status;
7105
7106         status = decode_compound_hdr(xdr, &hdr);
7107         if (!status)
7108                 status = decode_create_session(xdr, res);
7109         return status;
7110 }
7111
7112 /*
7113  * Decode DESTROY_SESSION response
7114  */
7115 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7116                                         struct xdr_stream *xdr,
7117                                         void *res)
7118 {
7119         struct compound_hdr hdr;
7120         int status;
7121
7122         status = decode_compound_hdr(xdr, &hdr);
7123         if (!status)
7124                 status = decode_destroy_session(xdr, res);
7125         return status;
7126 }
7127
7128 /*
7129  * Decode DESTROY_CLIENTID response
7130  */
7131 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7132                                         struct xdr_stream *xdr,
7133                                         void *res)
7134 {
7135         struct compound_hdr hdr;
7136         int status;
7137
7138         status = decode_compound_hdr(xdr, &hdr);
7139         if (!status)
7140                 status = decode_destroy_clientid(xdr, res);
7141         return status;
7142 }
7143
7144 /*
7145  * Decode SEQUENCE response
7146  */
7147 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7148                                  struct xdr_stream *xdr,
7149                                  void *res)
7150 {
7151         struct compound_hdr hdr;
7152         int status;
7153
7154         status = decode_compound_hdr(xdr, &hdr);
7155         if (!status)
7156                 status = decode_sequence(xdr, res, rqstp);
7157         return status;
7158 }
7159
7160 #endif
7161
7162 /*
7163  * Decode GET_LEASE_TIME response
7164  */
7165 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7166                                        struct xdr_stream *xdr,
7167                                        void *data)
7168 {
7169         struct nfs4_get_lease_time_res *res = data;
7170         struct compound_hdr hdr;
7171         int status;
7172
7173         status = decode_compound_hdr(xdr, &hdr);
7174         if (!status)
7175                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7176         if (!status)
7177                 status = decode_putrootfh(xdr);
7178         if (!status)
7179                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7180         return status;
7181 }
7182
7183 #ifdef CONFIG_NFS_V4_1
7184
7185 /*
7186  * Decode RECLAIM_COMPLETE response
7187  */
7188 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7189                                          struct xdr_stream *xdr,
7190                                          void *data)
7191 {
7192         struct nfs41_reclaim_complete_res *res = data;
7193         struct compound_hdr hdr;
7194         int status;
7195
7196         status = decode_compound_hdr(xdr, &hdr);
7197         if (!status)
7198                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7199         if (!status)
7200                 status = decode_reclaim_complete(xdr, NULL);
7201         return status;
7202 }
7203
7204 /*
7205  * Decode GETDEVINFO response
7206  */
7207 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7208                                       struct xdr_stream *xdr,
7209                                       void *data)
7210 {
7211         struct nfs4_getdeviceinfo_res *res = data;
7212         struct compound_hdr hdr;
7213         int status;
7214
7215         status = decode_compound_hdr(xdr, &hdr);
7216         if (status != 0)
7217                 goto out;
7218         status = decode_sequence(xdr, &res->seq_res, rqstp);
7219         if (status != 0)
7220                 goto out;
7221         status = decode_getdeviceinfo(xdr, res);
7222 out:
7223         return status;
7224 }
7225
7226 /*
7227  * Decode LAYOUTGET response
7228  */
7229 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7230                                   struct xdr_stream *xdr,
7231                                   void *data)
7232 {
7233         struct nfs4_layoutget_res *res = data;
7234         struct compound_hdr hdr;
7235         int status;
7236
7237         status = decode_compound_hdr(xdr, &hdr);
7238         if (status)
7239                 goto out;
7240         status = decode_sequence(xdr, &res->seq_res, rqstp);
7241         if (status)
7242                 goto out;
7243         status = decode_putfh(xdr);
7244         if (status)
7245                 goto out;
7246         status = decode_layoutget(xdr, rqstp, res);
7247 out:
7248         return status;
7249 }
7250
7251 /*
7252  * Decode LAYOUTRETURN response
7253  */
7254 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7255                                      struct xdr_stream *xdr,
7256                                      void *data)
7257 {
7258         struct nfs4_layoutreturn_res *res = data;
7259         struct compound_hdr hdr;
7260         int status;
7261
7262         status = decode_compound_hdr(xdr, &hdr);
7263         if (status)
7264                 goto out;
7265         status = decode_sequence(xdr, &res->seq_res, rqstp);
7266         if (status)
7267                 goto out;
7268         status = decode_putfh(xdr);
7269         if (status)
7270                 goto out;
7271         status = decode_layoutreturn(xdr, res);
7272 out:
7273         return status;
7274 }
7275
7276 /*
7277  * Decode LAYOUTCOMMIT response
7278  */
7279 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280                                      struct xdr_stream *xdr,
7281                                      void *data)
7282 {
7283         struct nfs4_layoutcommit_res *res = data;
7284         struct compound_hdr hdr;
7285         int status;
7286
7287         status = decode_compound_hdr(xdr, &hdr);
7288         if (status)
7289                 goto out;
7290         status = decode_sequence(xdr, &res->seq_res, rqstp);
7291         if (status)
7292                 goto out;
7293         status = decode_putfh(xdr);
7294         if (status)
7295                 goto out;
7296         status = decode_layoutcommit(xdr, rqstp, res);
7297         if (status)
7298                 goto out;
7299         decode_getfattr(xdr, res->fattr, res->server);
7300 out:
7301         return status;
7302 }
7303
7304 /*
7305  * Decode SECINFO_NO_NAME response
7306  */
7307 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7308                                         struct xdr_stream *xdr,
7309                                         void *data)
7310 {
7311         struct nfs4_secinfo_res *res = data;
7312         struct compound_hdr hdr;
7313         int status;
7314
7315         status = decode_compound_hdr(xdr, &hdr);
7316         if (status)
7317                 goto out;
7318         status = decode_sequence(xdr, &res->seq_res, rqstp);
7319         if (status)
7320                 goto out;
7321         status = decode_putrootfh(xdr);
7322         if (status)
7323                 goto out;
7324         status = decode_secinfo_no_name(xdr, res);
7325 out:
7326         return status;
7327 }
7328
7329 /*
7330  * Decode TEST_STATEID response
7331  */
7332 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7333                                      struct xdr_stream *xdr,
7334                                      void *data)
7335 {
7336         struct nfs41_test_stateid_res *res = data;
7337         struct compound_hdr hdr;
7338         int status;
7339
7340         status = decode_compound_hdr(xdr, &hdr);
7341         if (status)
7342                 goto out;
7343         status = decode_sequence(xdr, &res->seq_res, rqstp);
7344         if (status)
7345                 goto out;
7346         status = decode_test_stateid(xdr, res);
7347 out:
7348         return status;
7349 }
7350
7351 /*
7352  * Decode FREE_STATEID response
7353  */
7354 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7355                                      struct xdr_stream *xdr,
7356                                      void *data)
7357 {
7358         struct nfs41_free_stateid_res *res = data;
7359         struct compound_hdr hdr;
7360         int status;
7361
7362         status = decode_compound_hdr(xdr, &hdr);
7363         if (status)
7364                 goto out;
7365         status = decode_sequence(xdr, &res->seq_res, rqstp);
7366         if (status)
7367                 goto out;
7368         status = decode_free_stateid(xdr, res);
7369 out:
7370         return status;
7371 }
7372 #endif /* CONFIG_NFS_V4_1 */
7373
7374 /**
7375  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7376  *                      the local page cache.
7377  * @xdr: XDR stream where entry resides
7378  * @entry: buffer to fill in with entry data
7379  * @plus: boolean indicating whether this should be a readdirplus entry
7380  *
7381  * Returns zero if successful, otherwise a negative errno value is
7382  * returned.
7383  *
7384  * This function is not invoked during READDIR reply decoding, but
7385  * rather whenever an application invokes the getdents(2) system call
7386  * on a directory already in our cache.
7387  */
7388 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7389                        bool plus)
7390 {
7391         unsigned int savep;
7392         uint32_t bitmap[3] = {0};
7393         uint32_t len;
7394         uint64_t new_cookie;
7395         __be32 *p = xdr_inline_decode(xdr, 4);
7396         if (unlikely(!p))
7397                 return -EAGAIN;
7398         if (*p == xdr_zero) {
7399                 p = xdr_inline_decode(xdr, 4);
7400                 if (unlikely(!p))
7401                         return -EAGAIN;
7402                 if (*p == xdr_zero)
7403                         return -EAGAIN;
7404                 entry->eof = 1;
7405                 return -EBADCOOKIE;
7406         }
7407
7408         p = xdr_inline_decode(xdr, 12);
7409         if (unlikely(!p))
7410                 return -EAGAIN;
7411         p = xdr_decode_hyper(p, &new_cookie);
7412         entry->len = be32_to_cpup(p);
7413
7414         p = xdr_inline_decode(xdr, entry->len);
7415         if (unlikely(!p))
7416                 return -EAGAIN;
7417         entry->name = (const char *) p;
7418
7419         /*
7420          * In case the server doesn't return an inode number,
7421          * we fake one here.  (We don't use inode number 0,
7422          * since glibc seems to choke on it...)
7423          */
7424         entry->ino = 1;
7425         entry->fattr->valid = 0;
7426
7427         if (decode_attr_bitmap(xdr, bitmap) < 0)
7428                 return -EAGAIN;
7429
7430         if (decode_attr_length(xdr, &len, &savep) < 0)
7431                 return -EAGAIN;
7432
7433         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7434                         NULL, entry->label, entry->server) < 0)
7435                 return -EAGAIN;
7436         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7437                 entry->ino = entry->fattr->mounted_on_fileid;
7438         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7439                 entry->ino = entry->fattr->fileid;
7440
7441         entry->d_type = DT_UNKNOWN;
7442         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7443                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7444
7445         entry->prev_cookie = entry->cookie;
7446         entry->cookie = new_cookie;
7447
7448         return 0;
7449 }
7450
7451 /*
7452  * We need to translate between nfs status return values and
7453  * the local errno values which may not be the same.
7454  */
7455 static struct {
7456         int stat;
7457         int errno;
7458 } nfs_errtbl[] = {
7459         { NFS4_OK,              0               },
7460         { NFS4ERR_PERM,         -EPERM          },
7461         { NFS4ERR_NOENT,        -ENOENT         },
7462         { NFS4ERR_IO,           -errno_NFSERR_IO},
7463         { NFS4ERR_NXIO,         -ENXIO          },
7464         { NFS4ERR_ACCESS,       -EACCES         },
7465         { NFS4ERR_EXIST,        -EEXIST         },
7466         { NFS4ERR_XDEV,         -EXDEV          },
7467         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7468         { NFS4ERR_ISDIR,        -EISDIR         },
7469         { NFS4ERR_INVAL,        -EINVAL         },
7470         { NFS4ERR_FBIG,         -EFBIG          },
7471         { NFS4ERR_NOSPC,        -ENOSPC         },
7472         { NFS4ERR_ROFS,         -EROFS          },
7473         { NFS4ERR_MLINK,        -EMLINK         },
7474         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7475         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7476         { NFS4ERR_DQUOT,        -EDQUOT         },
7477         { NFS4ERR_STALE,        -ESTALE         },
7478         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7479         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7480         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7481         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7482         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7483         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7484         { NFS4ERR_LOCKED,       -EAGAIN         },
7485         { NFS4ERR_SYMLINK,      -ELOOP          },
7486         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7487         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7488         { NFS4ERR_NOXATTR,      -ENODATA        },
7489         { NFS4ERR_XATTR2BIG,    -E2BIG          },
7490         { -1,                   -EIO            }
7491 };
7492
7493 /*
7494  * Convert an NFS error code to a local one.
7495  * This one is used jointly by NFSv2 and NFSv3.
7496  */
7497 static int
7498 nfs4_stat_to_errno(int stat)
7499 {
7500         int i;
7501         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7502                 if (nfs_errtbl[i].stat == stat)
7503                         return nfs_errtbl[i].errno;
7504         }
7505         if (stat <= 10000 || stat > 10100) {
7506                 /* The server is looney tunes. */
7507                 return -EREMOTEIO;
7508         }
7509         /* If we cannot translate the error, the recovery routines should
7510          * handle it.
7511          * Note: remaining NFSv4 error codes have values > 10000, so should
7512          * not conflict with native Linux error codes.
7513          */
7514         return -stat;
7515 }
7516
7517 #ifdef CONFIG_NFS_V4_2
7518 #include "nfs42xdr.c"
7519 #endif /* CONFIG_NFS_V4_2 */
7520
7521 #define PROC(proc, argtype, restype)                            \
7522 [NFSPROC4_CLNT_##proc] = {                                      \
7523         .p_proc   = NFSPROC4_COMPOUND,                          \
7524         .p_encode = nfs4_xdr_##argtype,                         \
7525         .p_decode = nfs4_xdr_##restype,                         \
7526         .p_arglen = NFS4_##argtype##_sz,                        \
7527         .p_replen = NFS4_##restype##_sz,                        \
7528         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7529         .p_name   = #proc,                                      \
7530 }
7531
7532 #define STUB(proc)              \
7533 [NFSPROC4_CLNT_##proc] = {      \
7534         .p_name = #proc,        \
7535 }
7536
7537 #if defined(CONFIG_NFS_V4_1)
7538 #define PROC41(proc, argtype, restype)                          \
7539         PROC(proc, argtype, restype)
7540 #else
7541 #define PROC41(proc, argtype, restype)                          \
7542         STUB(proc)
7543 #endif
7544
7545 #if defined(CONFIG_NFS_V4_2)
7546 #define PROC42(proc, argtype, restype)                          \
7547         PROC(proc, argtype, restype)
7548 #else
7549 #define PROC42(proc, argtype, restype)                          \
7550         STUB(proc)
7551 #endif
7552
7553 const struct rpc_procinfo nfs4_procedures[] = {
7554         PROC(READ,              enc_read,               dec_read),
7555         PROC(WRITE,             enc_write,              dec_write),
7556         PROC(COMMIT,            enc_commit,             dec_commit),
7557         PROC(OPEN,              enc_open,               dec_open),
7558         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7559         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7560         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7561         PROC(CLOSE,             enc_close,              dec_close),
7562         PROC(SETATTR,           enc_setattr,            dec_setattr),
7563         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7564         PROC(RENEW,             enc_renew,              dec_renew),
7565         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7566         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7567         PROC(LOCK,              enc_lock,               dec_lock),
7568         PROC(LOCKT,             enc_lockt,              dec_lockt),
7569         PROC(LOCKU,             enc_locku,              dec_locku),
7570         PROC(ACCESS,            enc_access,             dec_access),
7571         PROC(GETATTR,           enc_getattr,            dec_getattr),
7572         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7573         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7574         PROC(REMOVE,            enc_remove,             dec_remove),
7575         PROC(RENAME,            enc_rename,             dec_rename),
7576         PROC(LINK,              enc_link,               dec_link),
7577         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7578         PROC(CREATE,            enc_create,             dec_create),
7579         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7580         PROC(STATFS,            enc_statfs,             dec_statfs),
7581         PROC(READLINK,          enc_readlink,           dec_readlink),
7582         PROC(READDIR,           enc_readdir,            dec_readdir),
7583         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7584         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7585         PROC(GETACL,            enc_getacl,             dec_getacl),
7586         PROC(SETACL,            enc_setacl,             dec_setacl),
7587         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7588         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7589         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7590         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7591         PROC41(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
7592         PROC41(CREATE_SESSION,  enc_create_session,     dec_create_session),
7593         PROC41(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
7594         PROC41(SEQUENCE,        enc_sequence,           dec_sequence),
7595         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7596         PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,   dec_reclaim_complete),
7597         PROC41(GETDEVICEINFO,   enc_getdeviceinfo,      dec_getdeviceinfo),
7598         PROC41(LAYOUTGET,       enc_layoutget,          dec_layoutget),
7599         PROC41(LAYOUTCOMMIT,    enc_layoutcommit,       dec_layoutcommit),
7600         PROC41(LAYOUTRETURN,    enc_layoutreturn,       dec_layoutreturn),
7601         PROC41(SECINFO_NO_NAME, enc_secinfo_no_name,    dec_secinfo_no_name),
7602         PROC41(TEST_STATEID,    enc_test_stateid,       dec_test_stateid),
7603         PROC41(FREE_STATEID,    enc_free_stateid,       dec_free_stateid),
7604         STUB(GETDEVICELIST),
7605         PROC41(BIND_CONN_TO_SESSION,
7606                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7607         PROC41(DESTROY_CLIENTID,enc_destroy_clientid,   dec_destroy_clientid),
7608         PROC42(SEEK,            enc_seek,               dec_seek),
7609         PROC42(ALLOCATE,        enc_allocate,           dec_allocate),
7610         PROC42(DEALLOCATE,      enc_deallocate,         dec_deallocate),
7611         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
7612         PROC42(CLONE,           enc_clone,              dec_clone),
7613         PROC42(COPY,            enc_copy,               dec_copy),
7614         PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
7615         PROC42(COPY_NOTIFY,     enc_copy_notify,        dec_copy_notify),
7616         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
7617         PROC42(LAYOUTERROR,     enc_layouterror,        dec_layouterror),
7618         PROC42(GETXATTR,        enc_getxattr,           dec_getxattr),
7619         PROC42(SETXATTR,        enc_setxattr,           dec_setxattr),
7620         PROC42(LISTXATTRS,      enc_listxattrs,         dec_listxattrs),
7621         PROC42(REMOVEXATTR,     enc_removexattr,        dec_removexattr),
7622         PROC42(READ_PLUS,       enc_read_plus,          dec_read_plus),
7623 };
7624
7625 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7626 const struct rpc_version nfs_version4 = {
7627         .number                 = 4,
7628         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7629         .procs                  = nfs4_procedures,
7630         .counts                 = nfs_version4_counts,
7631 };
7632
7633 /*
7634  * Local variables:
7635  *  c-basic-offset: 8
7636  * End:
7637  */