fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/fs_struct.h>
  56
  57 #include "nfs4_fs.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 static int nfs4_stat_to_errno(int);
  70
  71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  72 #ifdef DEBUG
  73 #define NFS4_MAXTAGLEN          20
  74 #else
  75 #define NFS4_MAXTAGLEN          0
  76 #endif
  77
  78 /* lock,open owner id:
  79  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  80  */
  81 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  82 #define lock_owner_id_maxsz     (1 + 1 + 4)
  83 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  84 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  86 #define op_encode_hdr_maxsz     (1)
  87 #define op_decode_hdr_maxsz     (2)
  88 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  90 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  92 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  93                                 (NFS4_FHSIZE >> 2))
  94 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  95 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  96 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  97 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  98 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  99                                 ((3+NFS4_FHSIZE) >> 2))
 100 #define nfs4_fattr_bitmap_maxsz 4
 101 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 102 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 103 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 104 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 108 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 109 #else
 110 #define nfs4_label_maxsz        0
 111 #endif
 112 /* We support only one layout type per file system */
 113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 114 /* This is based on getfattr, which uses the most attributes: */
 115 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 116                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 117                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 118                                  decode_mdsthreshold_maxsz))
 119 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 120                                 nfs4_fattr_value_maxsz)
 121 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 122 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 123                                  1 + 2 + 1 + \
 124                                 nfs4_owner_maxsz + \
 125                                 nfs4_group_maxsz + \
 126                                 nfs4_label_maxsz + \
 127                                 4 + 4)
 128 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 129 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 130 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 131 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 132 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 134  * layout types will be returned.
 135  */
 136 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 137                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 138 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 139 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 140 #define encode_setclientid_maxsz \
 141                                 (op_encode_hdr_maxsz + \
 142                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 143                                 /* client name */ \
 144                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 145                                 1 /* sc_prog */ + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 147                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 148                                 1) /* sc_cb_ident */
 149 #define decode_setclientid_maxsz \
 150                                 (op_decode_hdr_maxsz + \
 151                                 2 /* clientid */ + \
 152                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 154                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 155 #define encode_setclientid_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 158 #define decode_setclientid_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz)
 160 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 161 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 162 #define encode_share_access_maxsz \
 163                                 (2)
 164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 165 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 167 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 168                                 2 + encode_share_access_maxsz + 2 + \
 169                                 open_owner_id_maxsz + \
 170                                 encode_opentype_maxsz + \
 171                                 encode_claim_null_maxsz)
 172 #define decode_space_limit_maxsz        (3)
 173 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 174 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 175                                 decode_space_limit_maxsz + \
 176                                 decode_ace_maxsz)
 177 #define decode_change_info_maxsz        (5)
 178 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 179                                 decode_stateid_maxsz + \
 180                                 decode_change_info_maxsz + 1 + \
 181                                 nfs4_fattr_bitmap_maxsz + \
 182                                 decode_delegation_maxsz)
 183 #define encode_open_confirm_maxsz \
 184                                 (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 1)
 186 #define decode_open_confirm_maxsz \
 187                                 (op_decode_hdr_maxsz + \
 188                                  decode_stateid_maxsz)
 189 #define encode_open_downgrade_maxsz \
 190                                 (op_encode_hdr_maxsz + \
 191                                  encode_stateid_maxsz + 1 + \
 192                                  encode_share_access_maxsz)
 193 #define decode_open_downgrade_maxsz \
 194                                 (op_decode_hdr_maxsz + \
 195                                  decode_stateid_maxsz)
 196 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 197                                  1 + encode_stateid_maxsz)
 198 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 199                                  decode_stateid_maxsz)
 200 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 201                                  encode_stateid_maxsz + \
 202                                  encode_attrs_maxsz)
 203 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 204                                  nfs4_fattr_bitmap_maxsz)
 205 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 206                                  encode_stateid_maxsz + 3)
 207 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 208 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 209                                  2 + encode_verifier_maxsz + 5 + \
 210                                 nfs4_label_maxsz)
 211 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 212                                  decode_verifier_maxsz)
 213 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 214 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 215 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 216                                  encode_stateid_maxsz + 4)
 217 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 218                                  2 + decode_verifier_maxsz)
 219 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 220 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 221                                  decode_verifier_maxsz)
 222 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 223                                 nfs4_name_maxsz)
 224 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 225                                  decode_change_info_maxsz)
 226 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 227                                 2 * nfs4_name_maxsz)
 228 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 229                                  decode_change_info_maxsz + \
 230                                  decode_change_info_maxsz)
 231 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 232                                 nfs4_name_maxsz)
 233 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 234 #define encode_lockowner_maxsz  (7)
 235 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 236                                  7 + \
 237                                  1 + encode_stateid_maxsz + 1 + \
 238                                  encode_lockowner_maxsz)
 239 #define decode_lock_denied_maxsz \
 240                                 (8 + decode_lockowner_maxsz)
 241 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 242                                  decode_lock_denied_maxsz)
 243 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 244                                 encode_lockowner_maxsz)
 245 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 246                                  decode_lock_denied_maxsz)
 247 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 248                                  encode_stateid_maxsz + \
 249                                  4)
 250 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 251                                  decode_stateid_maxsz)
 252 #define encode_release_lockowner_maxsz \
 253                                 (op_encode_hdr_maxsz + \
 254                                  encode_lockowner_maxsz)
 255 #define decode_release_lockowner_maxsz \
 256                                 (op_decode_hdr_maxsz)
 257 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 258 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 259 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 260                                 1 + nfs4_name_maxsz + \
 261                                 1 + \
 262                                 nfs4_fattr_maxsz)
 263 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 264 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 265                                 1 + 2 + nfs4_name_maxsz + \
 266                                 encode_attrs_maxsz)
 267 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 268                                 decode_change_info_maxsz + \
 269                                 nfs4_fattr_bitmap_maxsz)
 270 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 271 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 272 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 273 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 274 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 275 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 276                                  nfs4_fattr_bitmap_maxsz + 1)
 277 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 278                                  encode_stateid_maxsz + 3)
 279 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 280 #define encode_fs_locations_maxsz \
 281                                 (encode_getattr_maxsz)
 282 #define decode_fs_locations_maxsz \
 283                                 (0)
 284 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 285 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 286
 287 #if defined(CONFIG_NFS_V4_1)
 288 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 289 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 290                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 291
 292 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 293                                 encode_verifier_maxsz + \
 294                                 1 /* co_ownerid.len */ + \
 295                                 /* eia_clientowner */ \
 296                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 297                                 1 /* flags */ + \
 298                                 1 /* spa_how */ + \
 299                                 /* max is SP4_MACH_CRED (for now) */ + \
 300                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 301                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 302                                 1 /* implementation id array of size 1 */ + \
 303                                 1 /* nii_domain */ + \
 304                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 305                                 1 /* nii_name */ + \
 306                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 307                                 3 /* nii_date */)
 308 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 309                                 2 /* eir_clientid */ + \
 310                                 1 /* eir_sequenceid */ + \
 311                                 1 /* eir_flags */ + \
 312                                 1 /* spr_how */ + \
 313                                   /* max is SP4_MACH_CRED (for now) */ + \
 314                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 315                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 316                                 2 /* eir_server_owner.so_minor_id */ + \
 317                                 /* eir_server_owner.so_major_id<> */ \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 319                                 /* eir_server_scope<> */ \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 321                                 1 /* eir_server_impl_id array length */ + \
 322                                 1 /* nii_domain */ + \
 323                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 324                                 1 /* nii_name */ + \
 325                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 326                                 3 /* nii_date */)
 327 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 328 #define decode_channel_attrs_maxsz  (6 + \
 329                                      1 /* ca_rdma_ird.len */ + \
 330                                      1 /* ca_rdma_ird */)
 331 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 332                                      2 /* csa_clientid */ + \
 333                                      1 /* csa_sequence */ + \
 334                                      1 /* csa_flags */ + \
 335                                      encode_channel_attrs_maxsz + \
 336                                      encode_channel_attrs_maxsz + \
 337                                      1 /* csa_cb_program */ + \
 338                                      1 /* csa_sec_parms.len (1) */ + \
 339                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 340                                      1 /* stamp */ + \
 341                                      1 /* machinename.len */ + \
 342                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 343                                      1 /* uid */ + \
 344                                      1 /* gid */ + \
 345                                      1 /* gids.len (0) */)
 346 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 347                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 348                                      1 /* csr_sequence */ + \
 349                                      1 /* csr_flags */ + \
 350                                      decode_channel_attrs_maxsz + \
 351                                      decode_channel_attrs_maxsz)
 352 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 353                                      /* bctsa_sessid */ \
 354                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 355                                      1 /* bctsa_dir */ + \
 356                                      1 /* bctsa_use_conn_in_rdma_mode */)
 357 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 358                                      /* bctsr_sessid */ \
 359                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 360                                      1 /* bctsr_dir */ + \
 361                                      1 /* bctsr_use_conn_in_rdma_mode */)
 362 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 363 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 364 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 365 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 366 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 367                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 368 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 369                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 370 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 371 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 372 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 373                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 374                                 1 /* layout type */ + \
 375                                 1 /* maxcount */ + \
 376                                 1 /* bitmap size */ + \
 377                                 1 /* notification bitmap length */ + \
 378                                 1 /* notification bitmap, word 0 */)
 379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 380                                 1 /* layout type */ + \
 381                                 1 /* opaque devaddr4 length */ + \
 382                                   /* devaddr4 payload is read into page */ \
 383                                 1 /* notification bitmap length */ + \
 384                                 1 /* notification bitmap, word 0 */)
 385 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 386                                 encode_stateid_maxsz)
 387 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 388                                 decode_stateid_maxsz + \
 389                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 391                                 2 /* offset */ + \
 392                                 2 /* length */ + \
 393                                 1 /* reclaim */ + \
 394                                 encode_stateid_maxsz + \
 395                                 1 /* new offset (true) */ + \
 396                                 2 /* last byte written */ + \
 397                                 1 /* nt_timechanged (false) */ + \
 398                                 1 /* layoutupdate4 layout type */ + \
 399                                 1 /* layoutupdate4 opaqueue len */)
 400                                   /* the actual content of layoutupdate4 should
 401                                      be allocated by drivers and spliced in
 402                                      using xdr_write_pages */
 403 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 404 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 405                                 encode_stateid_maxsz + \
 406                                 1 + \
 407                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 408 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 409                                 1 + decode_stateid_maxsz)
 410 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 411 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 412 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 413                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 414 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 415 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 416                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 417 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 418 #else /* CONFIG_NFS_V4_1 */
 419 #define encode_sequence_maxsz   0
 420 #define decode_sequence_maxsz   0
 421 #define encode_layoutreturn_maxsz 0
 422 #define decode_layoutreturn_maxsz 0
 423 #endif /* CONFIG_NFS_V4_1 */
 424
 425 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 426 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 427 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 428                                 encode_sequence_maxsz + \
 429                                 encode_putfh_maxsz + \
 430                                 encode_read_maxsz)
 431 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 432                                 decode_sequence_maxsz + \
 433                                 decode_putfh_maxsz + \
 434                                 decode_read_maxsz)
 435 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 436                                 encode_sequence_maxsz + \
 437                                 encode_putfh_maxsz + \
 438                                 encode_readlink_maxsz)
 439 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 440                                 decode_sequence_maxsz + \
 441                                 decode_putfh_maxsz + \
 442                                 decode_readlink_maxsz)
 443 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 444                                 encode_sequence_maxsz + \
 445                                 encode_putfh_maxsz + \
 446                                 encode_readdir_maxsz)
 447 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 448                                 decode_sequence_maxsz + \
 449                                 decode_putfh_maxsz + \
 450                                 decode_readdir_maxsz)
 451 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_write_maxsz + \
 455                                 encode_getattr_maxsz)
 456 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 457                                 decode_sequence_maxsz + \
 458                                 decode_putfh_maxsz + \
 459                                 decode_write_maxsz + \
 460                                 decode_getattr_maxsz)
 461 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_commit_maxsz)
 465 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_commit_maxsz)
 469 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 470                                 encode_sequence_maxsz + \
 471                                 encode_putfh_maxsz + \
 472                                 encode_open_maxsz + \
 473                                 encode_access_maxsz + \
 474                                 encode_getfh_maxsz + \
 475                                 encode_getattr_maxsz)
 476 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putfh_maxsz + \
 479                                 decode_open_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_open_confirm_sz \
 484                                 (compound_encode_hdr_maxsz + \
 485                                  encode_putfh_maxsz + \
 486                                  encode_open_confirm_maxsz)
 487 #define NFS4_dec_open_confirm_sz \
 488                                 (compound_decode_hdr_maxsz + \
 489                                  decode_putfh_maxsz + \
 490                                  decode_open_confirm_maxsz)
 491 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 492                                         encode_sequence_maxsz + \
 493                                         encode_putfh_maxsz + \
 494                                         encode_open_maxsz + \
 495                                         encode_access_maxsz + \
 496                                         encode_getattr_maxsz)
 497 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 498                                         decode_sequence_maxsz + \
 499                                         decode_putfh_maxsz + \
 500                                         decode_open_maxsz + \
 501                                         decode_access_maxsz + \
 502                                         decode_getattr_maxsz)
 503 #define NFS4_enc_open_downgrade_sz \
 504                                 (compound_encode_hdr_maxsz + \
 505                                  encode_sequence_maxsz + \
 506                                  encode_putfh_maxsz + \
 507                                  encode_layoutreturn_maxsz + \
 508                                  encode_open_downgrade_maxsz)
 509 #define NFS4_dec_open_downgrade_sz \
 510                                 (compound_decode_hdr_maxsz + \
 511                                  decode_sequence_maxsz + \
 512                                  decode_putfh_maxsz + \
 513                                  decode_layoutreturn_maxsz + \
 514                                  decode_open_downgrade_maxsz)
 515 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 516                                  encode_sequence_maxsz + \
 517                                  encode_putfh_maxsz + \
 518                                  encode_layoutreturn_maxsz + \
 519                                  encode_close_maxsz + \
 520                                  encode_getattr_maxsz)
 521 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 522                                  decode_sequence_maxsz + \
 523                                  decode_putfh_maxsz + \
 524                                  decode_layoutreturn_maxsz + \
 525                                  decode_close_maxsz + \
 526                                  decode_getattr_maxsz)
 527 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 528                                  encode_sequence_maxsz + \
 529                                  encode_putfh_maxsz + \
 530                                  encode_setattr_maxsz + \
 531                                  encode_getattr_maxsz)
 532 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 533                                  decode_sequence_maxsz + \
 534                                  decode_putfh_maxsz + \
 535                                  decode_setattr_maxsz + \
 536                                  decode_getattr_maxsz)
 537 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 538                                 encode_sequence_maxsz + \
 539                                 encode_putfh_maxsz + \
 540                                 encode_fsinfo_maxsz)
 541 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 542                                 decode_sequence_maxsz + \
 543                                 decode_putfh_maxsz + \
 544                                 decode_fsinfo_maxsz)
 545 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 546                                 encode_renew_maxsz)
 547 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 548                                 decode_renew_maxsz)
 549 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 550                                 encode_setclientid_maxsz)
 551 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 552                                 decode_setclientid_maxsz)
 553 #define NFS4_enc_setclientid_confirm_sz \
 554                                 (compound_encode_hdr_maxsz + \
 555                                 encode_setclientid_confirm_maxsz)
 556 #define NFS4_dec_setclientid_confirm_sz \
 557                                 (compound_decode_hdr_maxsz + \
 558                                 decode_setclientid_confirm_maxsz)
 559 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 560                                 encode_sequence_maxsz + \
 561                                 encode_putfh_maxsz + \
 562                                 encode_lock_maxsz)
 563 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 564                                 decode_sequence_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_lock_maxsz)
 567 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_lockt_maxsz)
 571 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 572                                  decode_sequence_maxsz + \
 573                                  decode_putfh_maxsz + \
 574                                  decode_lockt_maxsz)
 575 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 576                                 encode_sequence_maxsz + \
 577                                 encode_putfh_maxsz + \
 578                                 encode_locku_maxsz)
 579 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_locku_maxsz)
 583 #define NFS4_enc_release_lockowner_sz \
 584                                 (compound_encode_hdr_maxsz + \
 585                                  encode_lockowner_maxsz)
 586 #define NFS4_dec_release_lockowner_sz \
 587                                 (compound_decode_hdr_maxsz + \
 588                                  decode_lockowner_maxsz)
 589 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 590                                 encode_sequence_maxsz + \
 591                                 encode_putfh_maxsz + \
 592                                 encode_access_maxsz + \
 593                                 encode_getattr_maxsz)
 594 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_access_maxsz + \
 598                                 decode_getattr_maxsz)
 599 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_getattr_maxsz + \
 603                                 encode_renew_maxsz)
 604 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 605                                 decode_sequence_maxsz + \
 606                                 decode_putfh_maxsz + \
 607                                 decode_getattr_maxsz + \
 608                                 decode_renew_maxsz)
 609 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 610                                 encode_sequence_maxsz + \
 611                                 encode_putfh_maxsz + \
 612                                 encode_lookup_maxsz + \
 613                                 encode_getattr_maxsz + \
 614                                 encode_getfh_maxsz)
 615 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 616                                 decode_sequence_maxsz + \
 617                                 decode_putfh_maxsz + \
 618                                 decode_lookup_maxsz + \
 619                                 decode_getattr_maxsz + \
 620                                 decode_getfh_maxsz)
 621 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putrootfh_maxsz + \
 624                                 encode_getattr_maxsz + \
 625                                 encode_getfh_maxsz)
 626 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 627                                 decode_sequence_maxsz + \
 628                                 decode_putrootfh_maxsz + \
 629                                 decode_getattr_maxsz + \
 630                                 decode_getfh_maxsz)
 631 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 632                                 encode_sequence_maxsz + \
 633                                 encode_putfh_maxsz + \
 634                                 encode_remove_maxsz)
 635 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 636                                 decode_sequence_maxsz + \
 637                                 decode_putfh_maxsz + \
 638                                 decode_remove_maxsz)
 639 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 640                                 encode_sequence_maxsz + \
 641                                 encode_putfh_maxsz + \
 642                                 encode_savefh_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_rename_maxsz)
 645 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_savefh_maxsz + \
 649                                 decode_putfh_maxsz + \
 650                                 decode_rename_maxsz)
 651 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_savefh_maxsz + \
 655                                 encode_putfh_maxsz + \
 656                                 encode_link_maxsz + \
 657                                 encode_restorefh_maxsz + \
 658                                 encode_getattr_maxsz)
 659 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 660                                 decode_sequence_maxsz + \
 661                                 decode_putfh_maxsz + \
 662                                 decode_savefh_maxsz + \
 663                                 decode_putfh_maxsz + \
 664                                 decode_link_maxsz + \
 665                                 decode_restorefh_maxsz + \
 666                                 decode_getattr_maxsz)
 667 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 668                                 encode_sequence_maxsz + \
 669                                 encode_putfh_maxsz + \
 670                                 encode_symlink_maxsz + \
 671                                 encode_getattr_maxsz + \
 672                                 encode_getfh_maxsz)
 673 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 674                                 decode_sequence_maxsz + \
 675                                 decode_putfh_maxsz + \
 676                                 decode_symlink_maxsz + \
 677                                 decode_getattr_maxsz + \
 678                                 decode_getfh_maxsz)
 679 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 680                                 encode_sequence_maxsz + \
 681                                 encode_putfh_maxsz + \
 682                                 encode_create_maxsz + \
 683                                 encode_getfh_maxsz + \
 684                                 encode_getattr_maxsz)
 685 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 686                                 decode_sequence_maxsz + \
 687                                 decode_putfh_maxsz + \
 688                                 decode_create_maxsz + \
 689                                 decode_getfh_maxsz + \
 690                                 decode_getattr_maxsz)
 691 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 692                                 encode_sequence_maxsz + \
 693                                 encode_putfh_maxsz + \
 694                                 encode_getattr_maxsz)
 695 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 696                                 decode_sequence_maxsz + \
 697                                 decode_putfh_maxsz + \
 698                                 decode_getattr_maxsz)
 699 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 700                                 encode_sequence_maxsz + \
 701                                 encode_putfh_maxsz + \
 702                                 encode_statfs_maxsz)
 703 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 704                                 decode_sequence_maxsz + \
 705                                 decode_putfh_maxsz + \
 706                                 decode_statfs_maxsz)
 707 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 708                                 encode_sequence_maxsz + \
 709                                 encode_putfh_maxsz + \
 710                                 encode_getattr_maxsz)
 711 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 712                                 decode_sequence_maxsz + \
 713                                 decode_putfh_maxsz + \
 714                                 decode_getattr_maxsz)
 715 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 716                                 encode_sequence_maxsz + \
 717                                 encode_putfh_maxsz + \
 718                                 encode_layoutreturn_maxsz + \
 719                                 encode_delegreturn_maxsz + \
 720                                 encode_getattr_maxsz)
 721 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 722                                 decode_sequence_maxsz + \
 723                                 decode_putfh_maxsz + \
 724                                 decode_layoutreturn_maxsz + \
 725                                 decode_delegreturn_maxsz + \
 726                                 decode_getattr_maxsz)
 727 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 728                                 encode_sequence_maxsz + \
 729                                 encode_putfh_maxsz + \
 730                                 encode_getacl_maxsz)
 731 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 732                                 decode_sequence_maxsz + \
 733                                 decode_putfh_maxsz + \
 734                                 decode_getacl_maxsz)
 735 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 736                                 encode_sequence_maxsz + \
 737                                 encode_putfh_maxsz + \
 738                                 encode_setacl_maxsz)
 739 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 740                                 decode_sequence_maxsz + \
 741                                 decode_putfh_maxsz + \
 742                                 decode_setacl_maxsz)
 743 #define NFS4_enc_fs_locations_sz \
 744                                 (compound_encode_hdr_maxsz + \
 745                                  encode_sequence_maxsz + \
 746                                  encode_putfh_maxsz + \
 747                                  encode_lookup_maxsz + \
 748                                  encode_fs_locations_maxsz + \
 749                                  encode_renew_maxsz)
 750 #define NFS4_dec_fs_locations_sz \
 751                                 (compound_decode_hdr_maxsz + \
 752                                  decode_sequence_maxsz + \
 753                                  decode_putfh_maxsz + \
 754                                  decode_lookup_maxsz + \
 755                                  decode_fs_locations_maxsz + \
 756                                  decode_renew_maxsz)
 757 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 758                                 encode_sequence_maxsz + \
 759                                 encode_putfh_maxsz + \
 760                                 encode_secinfo_maxsz)
 761 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 762                                 decode_sequence_maxsz + \
 763                                 decode_putfh_maxsz + \
 764                                 decode_secinfo_maxsz)
 765 #define NFS4_enc_fsid_present_sz \
 766                                 (compound_encode_hdr_maxsz + \
 767                                  encode_sequence_maxsz + \
 768                                  encode_putfh_maxsz + \
 769                                  encode_getfh_maxsz + \
 770                                  encode_renew_maxsz)
 771 #define NFS4_dec_fsid_present_sz \
 772                                 (compound_decode_hdr_maxsz + \
 773                                  decode_sequence_maxsz + \
 774                                  decode_putfh_maxsz + \
 775                                  decode_getfh_maxsz + \
 776                                  decode_renew_maxsz)
 777 #if defined(CONFIG_NFS_V4_1)
 778 #define NFS4_enc_bind_conn_to_session_sz \
 779                                 (compound_encode_hdr_maxsz + \
 780                                  encode_bind_conn_to_session_maxsz)
 781 #define NFS4_dec_bind_conn_to_session_sz \
 782                                 (compound_decode_hdr_maxsz + \
 783                                  decode_bind_conn_to_session_maxsz)
 784 #define NFS4_enc_exchange_id_sz \
 785                                 (compound_encode_hdr_maxsz + \
 786                                  encode_exchange_id_maxsz)
 787 #define NFS4_dec_exchange_id_sz \
 788                                 (compound_decode_hdr_maxsz + \
 789                                  decode_exchange_id_maxsz)
 790 #define NFS4_enc_create_session_sz \
 791                                 (compound_encode_hdr_maxsz + \
 792                                  encode_create_session_maxsz)
 793 #define NFS4_dec_create_session_sz \
 794                                 (compound_decode_hdr_maxsz + \
 795                                  decode_create_session_maxsz)
 796 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 797                                          encode_destroy_session_maxsz)
 798 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 799                                          decode_destroy_session_maxsz)
 800 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 801                                          encode_destroy_clientid_maxsz)
 802 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 803                                          decode_destroy_clientid_maxsz)
 804 #define NFS4_enc_sequence_sz \
 805                                 (compound_decode_hdr_maxsz + \
 806                                  encode_sequence_maxsz)
 807 #define NFS4_dec_sequence_sz \
 808                                 (compound_decode_hdr_maxsz + \
 809                                  decode_sequence_maxsz)
 810 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 811                                          encode_sequence_maxsz + \
 812                                          encode_putrootfh_maxsz + \
 813                                          encode_fsinfo_maxsz)
 814 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 815                                          decode_sequence_maxsz + \
 816                                          decode_putrootfh_maxsz + \
 817                                          decode_fsinfo_maxsz)
 818 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 819                                          encode_sequence_maxsz + \
 820                                          encode_reclaim_complete_maxsz)
 821 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 822                                          decode_sequence_maxsz + \
 823                                          decode_reclaim_complete_maxsz)
 824 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 825                                 encode_sequence_maxsz +\
 826                                 encode_getdeviceinfo_maxsz)
 827 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 828                                 decode_sequence_maxsz + \
 829                                 decode_getdeviceinfo_maxsz)
 830 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 831                                 encode_sequence_maxsz + \
 832                                 encode_putfh_maxsz +        \
 833                                 encode_layoutget_maxsz)
 834 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 835                                 decode_sequence_maxsz + \
 836                                 decode_putfh_maxsz +        \
 837                                 decode_layoutget_maxsz)
 838 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 839                                 encode_sequence_maxsz +\
 840                                 encode_putfh_maxsz + \
 841                                 encode_layoutcommit_maxsz + \
 842                                 encode_getattr_maxsz)
 843 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 844                                 decode_sequence_maxsz + \
 845                                 decode_putfh_maxsz + \
 846                                 decode_layoutcommit_maxsz + \
 847                                 decode_getattr_maxsz)
 848 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 849                                 encode_sequence_maxsz + \
 850                                 encode_putfh_maxsz + \
 851                                 encode_layoutreturn_maxsz)
 852 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 853                                 decode_sequence_maxsz + \
 854                                 decode_putfh_maxsz + \
 855                                 decode_layoutreturn_maxsz)
 856 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 857                                         encode_sequence_maxsz + \
 858                                         encode_putrootfh_maxsz +\
 859                                         encode_secinfo_no_name_maxsz)
 860 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 861                                         decode_sequence_maxsz + \
 862                                         decode_putrootfh_maxsz + \
 863                                         decode_secinfo_no_name_maxsz)
 864 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 865                                          encode_sequence_maxsz + \
 866                                          encode_test_stateid_maxsz)
 867 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 868                                          decode_sequence_maxsz + \
 869                                          decode_test_stateid_maxsz)
 870 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 871                                          encode_sequence_maxsz + \
 872                                          encode_free_stateid_maxsz)
 873 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 874                                          decode_sequence_maxsz + \
 875                                          decode_free_stateid_maxsz)
 876
 877 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 878                                       compound_encode_hdr_maxsz +
 879                                       encode_sequence_maxsz +
 880                                       encode_putfh_maxsz +
 881                                       encode_getattr_maxsz) *
 882                                      XDR_UNIT);
 883
 884 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 885                                      compound_decode_hdr_maxsz +
 886                                      decode_sequence_maxsz +
 887                                      decode_putfh_maxsz) *
 888                                     XDR_UNIT);
 889
 890 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 891                                            compound_decode_hdr_maxsz +
 892                                            decode_sequence_maxsz) *
 893                                           XDR_UNIT);
 894 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 895 #endif /* CONFIG_NFS_V4_1 */
 896
 897 static const umode_t nfs_type2fmt[] = {
 898         [NF4BAD] = 0,
 899         [NF4REG] = S_IFREG,
 900         [NF4DIR] = S_IFDIR,
 901         [NF4BLK] = S_IFBLK,
 902         [NF4CHR] = S_IFCHR,
 903         [NF4LNK] = S_IFLNK,
 904         [NF4SOCK] = S_IFSOCK,
 905         [NF4FIFO] = S_IFIFO,
 906         [NF4ATTRDIR] = 0,
 907         [NF4NAMEDATTR] = 0,
 908 };
 909
 910 struct compound_hdr {
 911         int32_t         status;
 912         uint32_t        nops;
 913         __be32 *        nops_p;
 914         uint32_t        taglen;
 915         char *          tag;
 916         uint32_t        replen;         /* expected reply words */
 917         u32             minorversion;
 918 };
 919
 920 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 921 {
 922         __be32 *p = xdr_reserve_space(xdr, nbytes);
 923         BUG_ON(!p);
 924         return p;
 925 }
 926
 927 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 928 {
 929         WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
 930 }
 931
 932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 933 {
 934         WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
 935 }
 936
 937 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 938 {
 939         WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
 940 }
 941
 942 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 943 {
 944         WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
 945 }
 946
 947 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 948                 const struct nfs_seqid *seqid)
 949 {
 950         if (seqid != NULL)
 951                 encode_uint32(xdr, seqid->sequence->counter);
 952         else
 953                 encode_uint32(xdr, 0);
 954 }
 955
 956 static void encode_compound_hdr(struct xdr_stream *xdr,
 957                                 struct rpc_rqst *req,
 958                                 struct compound_hdr *hdr)
 959 {
 960         __be32 *p;
 961         struct rpc_auth *auth = req->rq_cred->cr_auth;
 962
 963         /* initialize running count of expected bytes in reply.
 964          * NOTE: the replied tag SHOULD be the same is the one sent,
 965          * but this is not required as a MUST for the server to do so. */
 966         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 967
 968         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 969         encode_string(xdr, hdr->taglen, hdr->tag);
 970         p = reserve_space(xdr, 8);
 971         *p++ = cpu_to_be32(hdr->minorversion);
 972         hdr->nops_p = p;
 973         *p = cpu_to_be32(hdr->nops);
 974 }
 975
 976 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 977                 uint32_t replen,
 978                 struct compound_hdr *hdr)
 979 {
 980         encode_uint32(xdr, op);
 981         hdr->nops++;
 982         hdr->replen += replen;
 983 }
 984
 985 static void encode_nops(struct compound_hdr *hdr)
 986 {
 987         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 988         *hdr->nops_p = htonl(hdr->nops);
 989 }
 990
 991 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 992 {
 993         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 994 }
 995
 996 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 997 {
 998         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
 999 }
1000
1001 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1002                                 const struct nfs4_label *label,
1003                                 const umode_t *umask,
1004                                 const struct nfs_server *server,
1005                                 const uint32_t attrmask[])
1006 {
1007         char owner_name[IDMAP_NAMESZ];
1008         char owner_group[IDMAP_NAMESZ];
1009         int owner_namelen = 0;
1010         int owner_grouplen = 0;
1011         __be32 *p;
1012         unsigned i;
1013         uint32_t len = 0;
1014         uint32_t bmval_len;
1015         uint32_t bmval[3] = { 0 };
1016
1017         /*
1018          * We reserve enough space to write the entire attribute buffer at once.
1019          */
1020         if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1021                 bmval[0] |= FATTR4_WORD0_SIZE;
1022                 len += 8;
1023         }
1024         if (iap->ia_valid & ATTR_MODE) {
1025                 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1026                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1027                         len += 8;
1028                 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1029                         bmval[1] |= FATTR4_WORD1_MODE;
1030                         len += 4;
1031                 }
1032         }
1033         if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1034                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035                 if (owner_namelen < 0) {
1036                         dprintk("nfs: couldn't resolve uid %d to string\n",
1037                                         from_kuid(&init_user_ns, iap->ia_uid));
1038                         /* XXX */
1039                         strcpy(owner_name, "nobody");
1040                         owner_namelen = sizeof("nobody") - 1;
1041                         /* goto out; */
1042                 }
1043                 bmval[1] |= FATTR4_WORD1_OWNER;
1044                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045         }
1046         if ((iap->ia_valid & ATTR_GID) &&
1047            (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1048                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1049                 if (owner_grouplen < 0) {
1050                         dprintk("nfs: couldn't resolve gid %d to string\n",
1051                                         from_kgid(&init_user_ns, iap->ia_gid));
1052                         strcpy(owner_group, "nobody");
1053                         owner_grouplen = sizeof("nobody") - 1;
1054                         /* goto out; */
1055                 }
1056                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1057                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1058         }
1059         if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1060                 if (iap->ia_valid & ATTR_ATIME_SET) {
1061                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1062                         len += 16;
1063                 } else if (iap->ia_valid & ATTR_ATIME) {
1064                         bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065                         len += 4;
1066                 }
1067         }
1068         if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1069                 if (iap->ia_valid & ATTR_MTIME_SET) {
1070                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                         len += 16;
1072                 } else if (iap->ia_valid & ATTR_MTIME) {
1073                         bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                         len += 4;
1075                 }
1076         }
1077
1078         if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1079                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1080                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1081         }
1082
1083         if (bmval[2] != 0)
1084                 bmval_len = 3;
1085         else if (bmval[1] != 0)
1086                 bmval_len = 2;
1087         else
1088                 bmval_len = 1;
1089
1090         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1091
1092         *p++ = cpu_to_be32(bmval_len);
1093         for (i = 0; i < bmval_len; i++)
1094                 *p++ = cpu_to_be32(bmval[i]);
1095         *p++ = cpu_to_be32(len);
1096
1097         if (bmval[0] & FATTR4_WORD0_SIZE)
1098                 p = xdr_encode_hyper(p, iap->ia_size);
1099         if (bmval[1] & FATTR4_WORD1_MODE)
1100                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1101         if (bmval[1] & FATTR4_WORD1_OWNER)
1102                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1103         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1104                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1105         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1106                 if (iap->ia_valid & ATTR_ATIME_SET) {
1107                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1108                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1109                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1110                 } else
1111                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1112         }
1113         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1114                 if (iap->ia_valid & ATTR_MTIME_SET) {
1115                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1116                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1117                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1118                 } else
1119                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1120         }
1121         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1122                 *p++ = cpu_to_be32(label->lfs);
1123                 *p++ = cpu_to_be32(label->pi);
1124                 *p++ = cpu_to_be32(label->len);
1125                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1126         }
1127         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1128                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1129                 *p++ = cpu_to_be32(*umask);
1130         }
1131
1132 /* out: */
1133 }
1134
1135 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1136 {
1137         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1138         encode_uint32(xdr, access);
1139 }
1140
1141 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1142 {
1143         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1144         encode_nfs4_seqid(xdr, arg->seqid);
1145         encode_nfs4_stateid(xdr, &arg->stateid);
1146 }
1147
1148 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1149 {
1150         __be32 *p;
1151
1152         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1153         p = reserve_space(xdr, 12);
1154         p = xdr_encode_hyper(p, args->offset);
1155         *p = cpu_to_be32(args->count);
1156 }
1157
1158 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1163         encode_uint32(xdr, create->ftype);
1164
1165         switch (create->ftype) {
1166         case NF4LNK:
1167                 p = reserve_space(xdr, 4);
1168                 *p = cpu_to_be32(create->u.symlink.len);
1169                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1170                                 create->u.symlink.len);
1171                 xdr->buf->flags |= XDRBUF_WRITE;
1172                 break;
1173
1174         case NF4BLK: case NF4CHR:
1175                 p = reserve_space(xdr, 8);
1176                 *p++ = cpu_to_be32(create->u.device.specdata1);
1177                 *p = cpu_to_be32(create->u.device.specdata2);
1178                 break;
1179
1180         default:
1181                 break;
1182         }
1183
1184         encode_string(xdr, create->name->len, create->name->name);
1185         encode_attrs(xdr, create->attrs, create->label, &create->umask,
1186                         create->server, create->server->attr_bitmask);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194         p = reserve_space(xdr, 8);
1195         *p++ = cpu_to_be32(1);
1196         *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204         p = reserve_space(xdr, 12);
1205         *p++ = cpu_to_be32(2);
1206         *p++ = cpu_to_be32(bm0);
1207         *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213                      struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         if (bm2) {
1219                 p = reserve_space(xdr, 16);
1220                 *p++ = cpu_to_be32(3);
1221                 *p++ = cpu_to_be32(bm0);
1222                 *p++ = cpu_to_be32(bm1);
1223                 *p = cpu_to_be32(bm2);
1224         } else if (bm1) {
1225                 p = reserve_space(xdr, 12);
1226                 *p++ = cpu_to_be32(2);
1227                 *p++ = cpu_to_be32(bm0);
1228                 *p = cpu_to_be32(bm1);
1229         } else {
1230                 p = reserve_space(xdr, 8);
1231                 *p++ = cpu_to_be32(1);
1232                 *p = cpu_to_be32(bm0);
1233         }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239                            bitmask[1] & nfs4_fattr_bitmap[1],
1240                            bitmask[2] & nfs4_fattr_bitmap[2],
1241                            hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245                                  const u32 *open_bitmap,
1246                                  struct compound_hdr *hdr)
1247 {
1248         encode_getattr_three(xdr,
1249                              bitmask[0] & open_bitmap[0],
1250                              bitmask[1] & open_bitmap[1],
1251                              bitmask[2] & open_bitmap[2],
1252                              hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257         encode_getattr_three(xdr,
1258                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1259                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1260                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1261                              hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278         encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283         if (fl->fl_type == F_RDLCK)
1284                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290         if (fl->fl_end == OFFSET_MAX)
1291                 return ~(uint64_t)0;
1292         return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297         __be32 *p;
1298
1299         p = reserve_space(xdr, 32);
1300         p = xdr_encode_hyper(p, lowner->clientid);
1301         *p++ = cpu_to_be32(20);
1302         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303         *p++ = cpu_to_be32(lowner->s_dev);
1304         xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310  */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313         __be32 *p;
1314
1315         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316         p = reserve_space(xdr, 28);
1317         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318         *p++ = cpu_to_be32(args->reclaim);
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         *p = cpu_to_be32(args->new_lock_owner);
1322         if (args->new_lock_owner){
1323                 encode_nfs4_seqid(xdr, args->open_seqid);
1324                 encode_nfs4_stateid(xdr, &args->open_stateid);
1325                 encode_nfs4_seqid(xdr, args->lock_seqid);
1326                 encode_lockowner(xdr, &args->lock_owner);
1327         }
1328         else {
1329                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330                 encode_nfs4_seqid(xdr, args->lock_seqid);
1331         }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336         __be32 *p;
1337
1338         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339         p = reserve_space(xdr, 20);
1340         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341         p = xdr_encode_hyper(p, args->fl->fl_start);
1342         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343         encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348         __be32 *p;
1349
1350         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352         encode_nfs4_seqid(xdr, args->seqid);
1353         encode_nfs4_stateid(xdr, &args->stateid);
1354         p = reserve_space(xdr, 16);
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362         encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368         encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373         __be32 *p;
1374
1375         p = reserve_space(xdr, 8);
1376         *p++ = cpu_to_be32(share_access);
1377         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382         __be32 *p;
1383  /*
1384  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385  * owner 4 = 32
1386  */
1387         encode_nfs4_seqid(xdr, arg->seqid);
1388         encode_share_access(xdr, arg->share_access);
1389         p = reserve_space(xdr, 36);
1390         p = xdr_encode_hyper(p, arg->clientid);
1391         *p++ = cpu_to_be32(24);
1392         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393         *p++ = cpu_to_be32(arg->server->s_dev);
1394         *p++ = cpu_to_be32(arg->id.uniquifier);
1395         xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch(arg->createmode) {
1404         case NFS4_CREATE_UNCHECKED:
1405                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1407                                 arg->server, arg->server->attr_bitmask);
1408                 break;
1409         case NFS4_CREATE_GUARDED:
1410                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1411                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1412                                 arg->server, arg->server->attr_bitmask);
1413                 break;
1414         case NFS4_CREATE_EXCLUSIVE:
1415                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1416                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1417                 break;
1418         case NFS4_CREATE_EXCLUSIVE4_1:
1419                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1420                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421                 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1422                                 arg->server, arg->server->exclcreat_bitmask);
1423         }
1424 }
1425
1426 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1427 {
1428         __be32 *p;
1429
1430         p = reserve_space(xdr, 4);
1431         switch (arg->open_flags & O_CREAT) {
1432         case 0:
1433                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1434                 break;
1435         default:
1436                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1437                 encode_createmode(xdr, arg);
1438         }
1439 }
1440
1441 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 4);
1446         switch (delegation_type) {
1447         case 0:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1449                 break;
1450         case FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1452                 break;
1453         case FMODE_WRITE|FMODE_READ:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1455                 break;
1456         default:
1457                 BUG();
1458         }
1459 }
1460
1461 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1462 {
1463         __be32 *p;
1464
1465         p = reserve_space(xdr, 4);
1466         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1467         encode_string(xdr, name->len, name->name);
1468 }
1469
1470 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 4);
1475         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1476         encode_delegation_type(xdr, type);
1477 }
1478
1479 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1485         encode_nfs4_stateid(xdr, stateid);
1486         encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_fh(struct xdr_stream *xdr)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4);
1494         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1495 }
1496
1497 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1503         encode_nfs4_stateid(xdr, stateid);
1504 }
1505
1506 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1507 {
1508         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1509         encode_openhdr(xdr, arg);
1510         encode_opentype(xdr, arg);
1511         switch (arg->claim) {
1512         case NFS4_OPEN_CLAIM_NULL:
1513                 encode_claim_null(xdr, arg->name);
1514                 break;
1515         case NFS4_OPEN_CLAIM_PREVIOUS:
1516                 encode_claim_previous(xdr, arg->u.delegation_type);
1517                 break;
1518         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1519                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1520                 break;
1521         case NFS4_OPEN_CLAIM_FH:
1522                 encode_claim_fh(xdr);
1523                 break;
1524         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1525                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1526                 break;
1527         default:
1528                 BUG();
1529         }
1530 }
1531
1532 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1533 {
1534         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1535         encode_nfs4_stateid(xdr, arg->stateid);
1536         encode_nfs4_seqid(xdr, arg->seqid);
1537 }
1538
1539 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1540 {
1541         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1542         encode_nfs4_stateid(xdr, &arg->stateid);
1543         encode_nfs4_seqid(xdr, arg->seqid);
1544         encode_share_access(xdr, arg->share_access);
1545 }
1546
1547 static void
1548 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1549 {
1550         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1551         encode_string(xdr, fh->size, fh->data);
1552 }
1553
1554 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1555 {
1556         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1557 }
1558
1559 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1560                         struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565         encode_nfs4_stateid(xdr, &args->stateid);
1566
1567         p = reserve_space(xdr, 12);
1568         p = xdr_encode_hyper(p, args->offset);
1569         *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574         uint32_t attrs[3] = {
1575                 FATTR4_WORD0_RDATTR_ERROR,
1576                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577         };
1578         uint32_t dircount = readdir->count >> 1;
1579         __be32 *p, verf[2];
1580         uint32_t attrlen = 0;
1581         unsigned int i;
1582
1583         if (readdir->plus) {
1584                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591                 dircount >>= 1;
1592         }
1593         /* Use mounted_on_fileid only if the server supports it */
1594         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595                 attrs[0] |= FATTR4_WORD0_FILEID;
1596         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597                 attrs[i] &= readdir->bitmask[i];
1598                 if (attrs[i] != 0)
1599                         attrlen = i+1;
1600         }
1601
1602         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603         encode_uint64(xdr, readdir->cookie);
1604         encode_nfs4_verifier(xdr, &readdir->verifier);
1605         p = reserve_space(xdr, 12 + (attrlen << 2));
1606         *p++ = cpu_to_be32(dircount);
1607         *p++ = cpu_to_be32(readdir->count);
1608         *p++ = cpu_to_be32(attrlen);
1609         for (i = 0; i < attrlen; i++)
1610                 *p++ = cpu_to_be32(attrs[i]);
1611         memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614                         __func__,
1615                         (unsigned long long)readdir->cookie,
1616                         verf[0], verf[1],
1617                         attrs[0] & readdir->bitmask[0],
1618                         attrs[1] & readdir->bitmask[1],
1619                         attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630         encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636         encode_string(xdr, oldname->len, oldname->name);
1637         encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641                          struct compound_hdr *hdr)
1642 {
1643         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644         encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656         __be32 *p;
1657
1658         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659         encode_nfs4_stateid(xdr, &zero_stateid);
1660         p = reserve_space(xdr, 2*4);
1661         *p++ = cpu_to_be32(1);
1662         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663         p = reserve_space(xdr, 4);
1664         *p = cpu_to_be32(arg->acl_len);
1665         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677         encode_nfs4_stateid(xdr, &arg->stateid);
1678         encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1679                         server->attr_bitmask);
1680 }
1681
1682 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1683 {
1684         __be32 *p;
1685
1686         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1687         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1688
1689         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1690                         setclientid->sc_clnt->cl_owner_id);
1691         p = reserve_space(xdr, 4);
1692         *p = cpu_to_be32(setclientid->sc_prog);
1693         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1694         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1695         p = reserve_space(xdr, 4);
1696         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1697 }
1698
1699 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1700 {
1701         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1702                         decode_setclientid_confirm_maxsz, hdr);
1703         encode_uint64(xdr, arg->clientid);
1704         encode_nfs4_verifier(xdr, &arg->confirm);
1705 }
1706
1707 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1708                          struct compound_hdr *hdr)
1709 {
1710         __be32 *p;
1711
1712         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1713         encode_nfs4_stateid(xdr, &args->stateid);
1714
1715         p = reserve_space(xdr, 16);
1716         p = xdr_encode_hyper(p, args->offset);
1717         *p++ = cpu_to_be32(args->stable);
1718         *p = cpu_to_be32(args->count);
1719
1720         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1721 }
1722
1723 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1724 {
1725         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1726         encode_nfs4_stateid(xdr, stateid);
1727 }
1728
1729 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1730 {
1731         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1732         encode_string(xdr, name->len, name->name);
1733 }
1734
1735 #if defined(CONFIG_NFS_V4_1)
1736 /* NFSv4.1 operations */
1737 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1738                                    struct nfs41_bind_conn_to_session_args *args,
1739                                    struct compound_hdr *hdr)
1740 {
1741         __be32 *p;
1742
1743         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1744                 decode_bind_conn_to_session_maxsz, hdr);
1745         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1746         p = xdr_reserve_space(xdr, 8);
1747         *p++ = cpu_to_be32(args->dir);
1748         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1749 }
1750
1751 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1752 {
1753         unsigned int i;
1754         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1755         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1756                 encode_uint32(xdr, op_map->u.words[i]);
1757 }
1758
1759 static void encode_exchange_id(struct xdr_stream *xdr,
1760                                struct nfs41_exchange_id_args *args,
1761                                struct compound_hdr *hdr)
1762 {
1763         __be32 *p;
1764         char impl_name[IMPL_NAME_LIMIT];
1765         int len = 0;
1766
1767         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1768         encode_nfs4_verifier(xdr, args->verifier);
1769
1770         encode_string(xdr, strlen(args->client->cl_owner_id),
1771                         args->client->cl_owner_id);
1772
1773         encode_uint32(xdr, args->flags);
1774         encode_uint32(xdr, args->state_protect.how);
1775
1776         switch (args->state_protect.how) {
1777         case SP4_NONE:
1778                 break;
1779         case SP4_MACH_CRED:
1780                 encode_op_map(xdr, &args->state_protect.enforce);
1781                 encode_op_map(xdr, &args->state_protect.allow);
1782                 break;
1783         default:
1784                 WARN_ON_ONCE(1);
1785                 break;
1786         }
1787
1788         if (send_implementation_id &&
1789             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1790             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1791                 <= sizeof(impl_name) + 1)
1792                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1793                                utsname()->sysname, utsname()->release,
1794                                utsname()->version, utsname()->machine);
1795
1796         if (len > 0) {
1797                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1798
1799                 encode_string(xdr,
1800                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1801                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1802                 encode_string(xdr, len, impl_name);
1803                 /* just send zeros for nii_date - the date is in nii_name */
1804                 p = reserve_space(xdr, 12);
1805                 p = xdr_encode_hyper(p, 0);
1806                 *p = cpu_to_be32(0);
1807         } else
1808                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1809 }
1810
1811 static void encode_create_session(struct xdr_stream *xdr,
1812                                   struct nfs41_create_session_args *args,
1813                                   struct compound_hdr *hdr)
1814 {
1815         __be32 *p;
1816         struct nfs_client *clp = args->client;
1817         struct rpc_clnt *clnt = clp->cl_rpcclient;
1818         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1819         u32 max_resp_sz_cached;
1820
1821         /*
1822          * Assumes OPEN is the biggest non-idempotent compound.
1823          * 2 is the verifier.
1824          */
1825         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1826                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1827
1828         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1829         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1830         p = xdr_encode_hyper(p, args->clientid);
1831         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1832         *p++ = cpu_to_be32(args->flags);                        /*flags */
1833
1834         /* Fore Channel */
1835         *p++ = cpu_to_be32(0);                          /* header padding size */
1836         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1837         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1838         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1839         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1841         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1842
1843         /* Back Channel */
1844         *p++ = cpu_to_be32(0);                          /* header padding size */
1845         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1846         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1847         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1848         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1850         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1851
1852         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1853         *p++ = cpu_to_be32(1);
1854         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1855
1856         /* authsys_parms rfc1831 */
1857         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1858         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1859         *p++ = cpu_to_be32(0);                          /* UID */
1860         *p++ = cpu_to_be32(0);                          /* GID */
1861         *p = cpu_to_be32(0);                            /* No more gids */
1862 }
1863
1864 static void encode_destroy_session(struct xdr_stream *xdr,
1865                                    struct nfs4_session *session,
1866                                    struct compound_hdr *hdr)
1867 {
1868         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1869         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1870 }
1871
1872 static void encode_destroy_clientid(struct xdr_stream *xdr,
1873                                    uint64_t clientid,
1874                                    struct compound_hdr *hdr)
1875 {
1876         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1877         encode_uint64(xdr, clientid);
1878 }
1879
1880 static void encode_reclaim_complete(struct xdr_stream *xdr,
1881                                     struct nfs41_reclaim_complete_args *args,
1882                                     struct compound_hdr *hdr)
1883 {
1884         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1885         encode_uint32(xdr, args->one_fs);
1886 }
1887 #endif /* CONFIG_NFS_V4_1 */
1888
1889 static void encode_sequence(struct xdr_stream *xdr,
1890                             const struct nfs4_sequence_args *args,
1891                             struct compound_hdr *hdr)
1892 {
1893 #if defined(CONFIG_NFS_V4_1)
1894         struct nfs4_session *session;
1895         struct nfs4_slot_table *tp;
1896         struct nfs4_slot *slot = args->sa_slot;
1897         __be32 *p;
1898
1899         tp = slot->table;
1900         session = tp->session;
1901         if (!session)
1902                 return;
1903
1904         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1905
1906         /*
1907          * Sessionid + seqid + slotid + max slotid + cache_this
1908          */
1909         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1910                 "max_slotid=%d cache_this=%d\n",
1911                 __func__,
1912                 ((u32 *)session->sess_id.data)[0],
1913                 ((u32 *)session->sess_id.data)[1],
1914                 ((u32 *)session->sess_id.data)[2],
1915                 ((u32 *)session->sess_id.data)[3],
1916                 slot->seq_nr, slot->slot_nr,
1917                 tp->highest_used_slotid, args->sa_cache_this);
1918         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1919         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1920         *p++ = cpu_to_be32(slot->seq_nr);
1921         *p++ = cpu_to_be32(slot->slot_nr);
1922         *p++ = cpu_to_be32(tp->highest_used_slotid);
1923         *p = cpu_to_be32(args->sa_cache_this);
1924 #endif /* CONFIG_NFS_V4_1 */
1925 }
1926
1927 #ifdef CONFIG_NFS_V4_1
1928 static void
1929 encode_getdeviceinfo(struct xdr_stream *xdr,
1930                      const struct nfs4_getdeviceinfo_args *args,
1931                      struct compound_hdr *hdr)
1932 {
1933         __be32 *p;
1934
1935         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1936         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1937         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1938                                     NFS4_DEVICEID4_SIZE);
1939         *p++ = cpu_to_be32(args->pdev->layout_type);
1940         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1941
1942         p = reserve_space(xdr, 4 + 4);
1943         *p++ = cpu_to_be32(1);                  /* bitmap length */
1944         *p++ = cpu_to_be32(args->notify_types);
1945 }
1946
1947 static void
1948 encode_layoutget(struct xdr_stream *xdr,
1949                       const struct nfs4_layoutget_args *args,
1950                       struct compound_hdr *hdr)
1951 {
1952         __be32 *p;
1953
1954         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1955         p = reserve_space(xdr, 36);
1956         *p++ = cpu_to_be32(0);     /* Signal layout available */
1957         *p++ = cpu_to_be32(args->type);
1958         *p++ = cpu_to_be32(args->range.iomode);
1959         p = xdr_encode_hyper(p, args->range.offset);
1960         p = xdr_encode_hyper(p, args->range.length);
1961         p = xdr_encode_hyper(p, args->minlength);
1962         encode_nfs4_stateid(xdr, &args->stateid);
1963         encode_uint32(xdr, args->maxcount);
1964
1965         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1966                 __func__,
1967                 args->type,
1968                 args->range.iomode,
1969                 (unsigned long)args->range.offset,
1970                 (unsigned long)args->range.length,
1971                 args->maxcount);
1972 }
1973
1974 static int
1975 encode_layoutcommit(struct xdr_stream *xdr,
1976                     struct inode *inode,
1977                     struct nfs4_layoutcommit_args *args,
1978                     struct compound_hdr *hdr)
1979 {
1980         __be32 *p;
1981
1982         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1983                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1984
1985         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1986         p = reserve_space(xdr, 20);
1987         /* Only whole file layouts */
1988         p = xdr_encode_hyper(p, 0); /* offset */
1989         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1990         *p = cpu_to_be32(0); /* reclaim */
1991         encode_nfs4_stateid(xdr, &args->stateid);
1992         if (args->lastbytewritten != U64_MAX) {
1993                 p = reserve_space(xdr, 20);
1994                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1995                 p = xdr_encode_hyper(p, args->lastbytewritten);
1996         } else {
1997                 p = reserve_space(xdr, 12);
1998                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
1999         }
2000         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2001         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2002
2003         encode_uint32(xdr, args->layoutupdate_len);
2004         if (args->layoutupdate_pages)
2005                 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2006                                 args->layoutupdate_len);
2007
2008         return 0;
2009 }
2010
2011 static void
2012 encode_layoutreturn(struct xdr_stream *xdr,
2013                     const struct nfs4_layoutreturn_args *args,
2014                     struct compound_hdr *hdr)
2015 {
2016         __be32 *p;
2017
2018         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2019         p = reserve_space(xdr, 16);
2020         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2021         *p++ = cpu_to_be32(args->layout_type);
2022         *p++ = cpu_to_be32(args->range.iomode);
2023         *p = cpu_to_be32(RETURN_FILE);
2024         p = reserve_space(xdr, 16);
2025         p = xdr_encode_hyper(p, args->range.offset);
2026         p = xdr_encode_hyper(p, args->range.length);
2027         spin_lock(&args->inode->i_lock);
2028         encode_nfs4_stateid(xdr, &args->stateid);
2029         spin_unlock(&args->inode->i_lock);
2030         if (args->ld_private->ops && args->ld_private->ops->encode)
2031                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2032         else
2033                 encode_uint32(xdr, 0);
2034 }
2035
2036 static int
2037 encode_secinfo_no_name(struct xdr_stream *xdr,
2038                        const struct nfs41_secinfo_no_name_args *args,
2039                        struct compound_hdr *hdr)
2040 {
2041         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2042         encode_uint32(xdr, args->style);
2043         return 0;
2044 }
2045
2046 static void encode_test_stateid(struct xdr_stream *xdr,
2047                                 struct nfs41_test_stateid_args *args,
2048                                 struct compound_hdr *hdr)
2049 {
2050         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2051         encode_uint32(xdr, 1);
2052         encode_nfs4_stateid(xdr, args->stateid);
2053 }
2054
2055 static void encode_free_stateid(struct xdr_stream *xdr,
2056                                 struct nfs41_free_stateid_args *args,
2057                                 struct compound_hdr *hdr)
2058 {
2059         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2060         encode_nfs4_stateid(xdr, &args->stateid);
2061 }
2062 #else
2063 static inline void
2064 encode_layoutreturn(struct xdr_stream *xdr,
2065                     const struct nfs4_layoutreturn_args *args,
2066                     struct compound_hdr *hdr)
2067 {
2068 }
2069 #endif /* CONFIG_NFS_V4_1 */
2070
2071 /*
2072  * END OF "GENERIC" ENCODE ROUTINES.
2073  */
2074
2075 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2076 {
2077 #if defined(CONFIG_NFS_V4_1)
2078         struct nfs4_session *session = args->sa_slot->table->session;
2079         if (session)
2080                 return session->clp->cl_mvops->minor_version;
2081 #endif /* CONFIG_NFS_V4_1 */
2082         return 0;
2083 }
2084
2085 /*
2086  * Encode an ACCESS request
2087  */
2088 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2089                                 const struct nfs4_accessargs *args)
2090 {
2091         struct compound_hdr hdr = {
2092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093         };
2094
2095         encode_compound_hdr(xdr, req, &hdr);
2096         encode_sequence(xdr, &args->seq_args, &hdr);
2097         encode_putfh(xdr, args->fh, &hdr);
2098         encode_access(xdr, args->access, &hdr);
2099         encode_getfattr(xdr, args->bitmask, &hdr);
2100         encode_nops(&hdr);
2101 }
2102
2103 /*
2104  * Encode LOOKUP request
2105  */
2106 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2107                                 const struct nfs4_lookup_arg *args)
2108 {
2109         struct compound_hdr hdr = {
2110                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2111         };
2112
2113         encode_compound_hdr(xdr, req, &hdr);
2114         encode_sequence(xdr, &args->seq_args, &hdr);
2115         encode_putfh(xdr, args->dir_fh, &hdr);
2116         encode_lookup(xdr, args->name, &hdr);
2117         encode_getfh(xdr, &hdr);
2118         encode_getfattr(xdr, args->bitmask, &hdr);
2119         encode_nops(&hdr);
2120 }
2121
2122 /*
2123  * Encode LOOKUP_ROOT request
2124  */
2125 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2126                                      struct xdr_stream *xdr,
2127                                      const struct nfs4_lookup_root_arg *args)
2128 {
2129         struct compound_hdr hdr = {
2130                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2131         };
2132
2133         encode_compound_hdr(xdr, req, &hdr);
2134         encode_sequence(xdr, &args->seq_args, &hdr);
2135         encode_putrootfh(xdr, &hdr);
2136         encode_getfh(xdr, &hdr);
2137         encode_getfattr(xdr, args->bitmask, &hdr);
2138         encode_nops(&hdr);
2139 }
2140
2141 /*
2142  * Encode REMOVE request
2143  */
2144 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2145                                 const struct nfs_removeargs *args)
2146 {
2147         struct compound_hdr hdr = {
2148                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2149         };
2150
2151         encode_compound_hdr(xdr, req, &hdr);
2152         encode_sequence(xdr, &args->seq_args, &hdr);
2153         encode_putfh(xdr, args->fh, &hdr);
2154         encode_remove(xdr, &args->name, &hdr);
2155         encode_nops(&hdr);
2156 }
2157
2158 /*
2159  * Encode RENAME request
2160  */
2161 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2162                                 const struct nfs_renameargs *args)
2163 {
2164         struct compound_hdr hdr = {
2165                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2166         };
2167
2168         encode_compound_hdr(xdr, req, &hdr);
2169         encode_sequence(xdr, &args->seq_args, &hdr);
2170         encode_putfh(xdr, args->old_dir, &hdr);
2171         encode_savefh(xdr, &hdr);
2172         encode_putfh(xdr, args->new_dir, &hdr);
2173         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2174         encode_nops(&hdr);
2175 }
2176
2177 /*
2178  * Encode LINK request
2179  */
2180 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2181                              const struct nfs4_link_arg *args)
2182 {
2183         struct compound_hdr hdr = {
2184                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2185         };
2186
2187         encode_compound_hdr(xdr, req, &hdr);
2188         encode_sequence(xdr, &args->seq_args, &hdr);
2189         encode_putfh(xdr, args->fh, &hdr);
2190         encode_savefh(xdr, &hdr);
2191         encode_putfh(xdr, args->dir_fh, &hdr);
2192         encode_link(xdr, args->name, &hdr);
2193         encode_restorefh(xdr, &hdr);
2194         encode_getfattr(xdr, args->bitmask, &hdr);
2195         encode_nops(&hdr);
2196 }
2197
2198 /*
2199  * Encode CREATE request
2200  */
2201 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2202                                 const struct nfs4_create_arg *args)
2203 {
2204         struct compound_hdr hdr = {
2205                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206         };
2207
2208         encode_compound_hdr(xdr, req, &hdr);
2209         encode_sequence(xdr, &args->seq_args, &hdr);
2210         encode_putfh(xdr, args->dir_fh, &hdr);
2211         encode_create(xdr, args, &hdr);
2212         encode_getfh(xdr, &hdr);
2213         encode_getfattr(xdr, args->bitmask, &hdr);
2214         encode_nops(&hdr);
2215 }
2216
2217 /*
2218  * Encode SYMLINK request
2219  */
2220 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                  const struct nfs4_create_arg *args)
2222 {
2223         nfs4_xdr_enc_create(req, xdr, args);
2224 }
2225
2226 /*
2227  * Encode GETATTR request
2228  */
2229 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2230                                  const struct nfs4_getattr_arg *args)
2231 {
2232         struct compound_hdr hdr = {
2233                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2234         };
2235
2236         encode_compound_hdr(xdr, req, &hdr);
2237         encode_sequence(xdr, &args->seq_args, &hdr);
2238         encode_putfh(xdr, args->fh, &hdr);
2239         encode_getfattr(xdr, args->bitmask, &hdr);
2240         encode_nops(&hdr);
2241 }
2242
2243 /*
2244  * Encode a CLOSE request
2245  */
2246 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2247                                struct nfs_closeargs *args)
2248 {
2249         struct compound_hdr hdr = {
2250                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251         };
2252
2253         encode_compound_hdr(xdr, req, &hdr);
2254         encode_sequence(xdr, &args->seq_args, &hdr);
2255         encode_putfh(xdr, args->fh, &hdr);
2256         if (args->lr_args)
2257                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2258         if (args->bitmask != NULL)
2259                 encode_getfattr(xdr, args->bitmask, &hdr);
2260         encode_close(xdr, args, &hdr);
2261         encode_nops(&hdr);
2262 }
2263
2264 /*
2265  * Encode an OPEN request
2266  */
2267 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2268                               struct nfs_openargs *args)
2269 {
2270         struct compound_hdr hdr = {
2271                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272         };
2273
2274         encode_compound_hdr(xdr, req, &hdr);
2275         encode_sequence(xdr, &args->seq_args, &hdr);
2276         encode_putfh(xdr, args->fh, &hdr);
2277         encode_open(xdr, args, &hdr);
2278         encode_getfh(xdr, &hdr);
2279         if (args->access)
2280                 encode_access(xdr, args->access, &hdr);
2281         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2282         encode_nops(&hdr);
2283 }
2284
2285 /*
2286  * Encode an OPEN_CONFIRM request
2287  */
2288 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2289                                       struct xdr_stream *xdr,
2290                                       struct nfs_open_confirmargs *args)
2291 {
2292         struct compound_hdr hdr = {
2293                 .nops   = 0,
2294         };
2295
2296         encode_compound_hdr(xdr, req, &hdr);
2297         encode_putfh(xdr, args->fh, &hdr);
2298         encode_open_confirm(xdr, args, &hdr);
2299         encode_nops(&hdr);
2300 }
2301
2302 /*
2303  * Encode an OPEN request with no attributes.
2304  */
2305 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2306                                      struct xdr_stream *xdr,
2307                                      struct nfs_openargs *args)
2308 {
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         encode_open(xdr, args, &hdr);
2317         if (args->access)
2318                 encode_access(xdr, args->access, &hdr);
2319         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2320         encode_nops(&hdr);
2321 }
2322
2323 /*
2324  * Encode an OPEN_DOWNGRADE request
2325  */
2326 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2327                                         struct xdr_stream *xdr,
2328                                         struct nfs_closeargs *args)
2329 {
2330         struct compound_hdr hdr = {
2331                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332         };
2333
2334         encode_compound_hdr(xdr, req, &hdr);
2335         encode_sequence(xdr, &args->seq_args, &hdr);
2336         encode_putfh(xdr, args->fh, &hdr);
2337         if (args->lr_args)
2338                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2339         encode_open_downgrade(xdr, args, &hdr);
2340         encode_nops(&hdr);
2341 }
2342
2343 /*
2344  * Encode a LOCK request
2345  */
2346 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2347                               struct nfs_lock_args *args)
2348 {
2349         struct compound_hdr hdr = {
2350                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351         };
2352
2353         encode_compound_hdr(xdr, req, &hdr);
2354         encode_sequence(xdr, &args->seq_args, &hdr);
2355         encode_putfh(xdr, args->fh, &hdr);
2356         encode_lock(xdr, args, &hdr);
2357         encode_nops(&hdr);
2358 }
2359
2360 /*
2361  * Encode a LOCKT request
2362  */
2363 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2364                                struct nfs_lockt_args *args)
2365 {
2366         struct compound_hdr hdr = {
2367                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368         };
2369
2370         encode_compound_hdr(xdr, req, &hdr);
2371         encode_sequence(xdr, &args->seq_args, &hdr);
2372         encode_putfh(xdr, args->fh, &hdr);
2373         encode_lockt(xdr, args, &hdr);
2374         encode_nops(&hdr);
2375 }
2376
2377 /*
2378  * Encode a LOCKU request
2379  */
2380 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2381                                struct nfs_locku_args *args)
2382 {
2383         struct compound_hdr hdr = {
2384                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385         };
2386
2387         encode_compound_hdr(xdr, req, &hdr);
2388         encode_sequence(xdr, &args->seq_args, &hdr);
2389         encode_putfh(xdr, args->fh, &hdr);
2390         encode_locku(xdr, args, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2395                                            struct xdr_stream *xdr,
2396                                         struct nfs_release_lockowner_args *args)
2397 {
2398         struct compound_hdr hdr = {
2399                 .minorversion = 0,
2400         };
2401
2402         encode_compound_hdr(xdr, req, &hdr);
2403         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2404         encode_nops(&hdr);
2405 }
2406
2407 /*
2408  * Encode a READLINK request
2409  */
2410 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2411                                   const struct nfs4_readlink *args)
2412 {
2413         struct compound_hdr hdr = {
2414                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2415         };
2416
2417         encode_compound_hdr(xdr, req, &hdr);
2418         encode_sequence(xdr, &args->seq_args, &hdr);
2419         encode_putfh(xdr, args->fh, &hdr);
2420         encode_readlink(xdr, args, req, &hdr);
2421
2422         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2423                         args->pgbase, args->pglen);
2424         encode_nops(&hdr);
2425 }
2426
2427 /*
2428  * Encode a READDIR request
2429  */
2430 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2431                                  const struct nfs4_readdir_arg *args)
2432 {
2433         struct compound_hdr hdr = {
2434                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435         };
2436
2437         encode_compound_hdr(xdr, req, &hdr);
2438         encode_sequence(xdr, &args->seq_args, &hdr);
2439         encode_putfh(xdr, args->fh, &hdr);
2440         encode_readdir(xdr, args, req, &hdr);
2441
2442         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2443                          args->pgbase, args->count);
2444         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2445                         __func__, hdr.replen << 2, args->pages,
2446                         args->pgbase, args->count);
2447         encode_nops(&hdr);
2448 }
2449
2450 /*
2451  * Encode a READ request
2452  */
2453 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2454                               struct nfs_pgio_args *args)
2455 {
2456         struct compound_hdr hdr = {
2457                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2458         };
2459
2460         encode_compound_hdr(xdr, req, &hdr);
2461         encode_sequence(xdr, &args->seq_args, &hdr);
2462         encode_putfh(xdr, args->fh, &hdr);
2463         encode_read(xdr, args, &hdr);
2464
2465         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2466                          args->pages, args->pgbase, args->count);
2467         req->rq_rcv_buf.flags |= XDRBUF_READ;
2468         encode_nops(&hdr);
2469 }
2470
2471 /*
2472  * Encode an SETATTR request
2473  */
2474 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2475                                  struct nfs_setattrargs *args)
2476 {
2477         struct compound_hdr hdr = {
2478                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2479         };
2480
2481         encode_compound_hdr(xdr, req, &hdr);
2482         encode_sequence(xdr, &args->seq_args, &hdr);
2483         encode_putfh(xdr, args->fh, &hdr);
2484         encode_setattr(xdr, args, args->server, &hdr);
2485         encode_getfattr(xdr, args->bitmask, &hdr);
2486         encode_nops(&hdr);
2487 }
2488
2489 /*
2490  * Encode a GETACL request
2491  */
2492 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2493                                 struct nfs_getaclargs *args)
2494 {
2495         struct compound_hdr hdr = {
2496                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497         };
2498         uint32_t replen;
2499
2500         encode_compound_hdr(xdr, req, &hdr);
2501         encode_sequence(xdr, &args->seq_args, &hdr);
2502         encode_putfh(xdr, args->fh, &hdr);
2503         replen = hdr.replen + op_decode_hdr_maxsz;
2504         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2505
2506         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2507                 args->acl_pages, 0, args->acl_len);
2508
2509         encode_nops(&hdr);
2510 }
2511
2512 /*
2513  * Encode a WRITE request
2514  */
2515 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2516                                struct nfs_pgio_args *args)
2517 {
2518         struct compound_hdr hdr = {
2519                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520         };
2521
2522         encode_compound_hdr(xdr, req, &hdr);
2523         encode_sequence(xdr, &args->seq_args, &hdr);
2524         encode_putfh(xdr, args->fh, &hdr);
2525         encode_write(xdr, args, &hdr);
2526         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2527         if (args->bitmask)
2528                 encode_getfattr(xdr, args->bitmask, &hdr);
2529         encode_nops(&hdr);
2530 }
2531
2532 /*
2533  *  a COMMIT request
2534  */
2535 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2536                                 struct nfs_commitargs *args)
2537 {
2538         struct compound_hdr hdr = {
2539                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540         };
2541
2542         encode_compound_hdr(xdr, req, &hdr);
2543         encode_sequence(xdr, &args->seq_args, &hdr);
2544         encode_putfh(xdr, args->fh, &hdr);
2545         encode_commit(xdr, args, &hdr);
2546         encode_nops(&hdr);
2547 }
2548
2549 /*
2550  * FSINFO request
2551  */
2552 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2553                                 struct nfs4_fsinfo_arg *args)
2554 {
2555         struct compound_hdr hdr = {
2556                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557         };
2558
2559         encode_compound_hdr(xdr, req, &hdr);
2560         encode_sequence(xdr, &args->seq_args, &hdr);
2561         encode_putfh(xdr, args->fh, &hdr);
2562         encode_fsinfo(xdr, args->bitmask, &hdr);
2563         encode_nops(&hdr);
2564 }
2565
2566 /*
2567  * a PATHCONF request
2568  */
2569 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2570                                   const struct nfs4_pathconf_arg *args)
2571 {
2572         struct compound_hdr hdr = {
2573                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574         };
2575
2576         encode_compound_hdr(xdr, req, &hdr);
2577         encode_sequence(xdr, &args->seq_args, &hdr);
2578         encode_putfh(xdr, args->fh, &hdr);
2579         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2580                            &hdr);
2581         encode_nops(&hdr);
2582 }
2583
2584 /*
2585  * a STATFS request
2586  */
2587 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2588                                 const struct nfs4_statfs_arg *args)
2589 {
2590         struct compound_hdr hdr = {
2591                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592         };
2593
2594         encode_compound_hdr(xdr, req, &hdr);
2595         encode_sequence(xdr, &args->seq_args, &hdr);
2596         encode_putfh(xdr, args->fh, &hdr);
2597         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2598                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2599         encode_nops(&hdr);
2600 }
2601
2602 /*
2603  * GETATTR_BITMAP request
2604  */
2605 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2606                                      struct xdr_stream *xdr,
2607                                      struct nfs4_server_caps_arg *args)
2608 {
2609         const u32 *bitmask = args->bitmask;
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_putfh(xdr, args->fhandle, &hdr);
2617         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2618         encode_nops(&hdr);
2619 }
2620
2621 /*
2622  * a RENEW request
2623  */
2624 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2625                                struct nfs_client *clp)
2626 {
2627         struct compound_hdr hdr = {
2628                 .nops   = 0,
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_renew(xdr, clp->cl_clientid, &hdr);
2633         encode_nops(&hdr);
2634 }
2635
2636 /*
2637  * a SETCLIENTID request
2638  */
2639 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2640                                      struct xdr_stream *xdr,
2641                                      struct nfs4_setclientid *sc)
2642 {
2643         struct compound_hdr hdr = {
2644                 .nops   = 0,
2645         };
2646
2647         encode_compound_hdr(xdr, req, &hdr);
2648         encode_setclientid(xdr, sc, &hdr);
2649         encode_nops(&hdr);
2650 }
2651
2652 /*
2653  * a SETCLIENTID_CONFIRM request
2654  */
2655 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2656                                              struct xdr_stream *xdr,
2657                                              struct nfs4_setclientid_res *arg)
2658 {
2659         struct compound_hdr hdr = {
2660                 .nops   = 0,
2661         };
2662
2663         encode_compound_hdr(xdr, req, &hdr);
2664         encode_setclientid_confirm(xdr, arg, &hdr);
2665         encode_nops(&hdr);
2666 }
2667
2668 /*
2669  * DELEGRETURN request
2670  */
2671 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2672                                      struct xdr_stream *xdr,
2673                                      const struct nfs4_delegreturnargs *args)
2674 {
2675         struct compound_hdr hdr = {
2676                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2677         };
2678
2679         encode_compound_hdr(xdr, req, &hdr);
2680         encode_sequence(xdr, &args->seq_args, &hdr);
2681         encode_putfh(xdr, args->fhandle, &hdr);
2682         if (args->lr_args)
2683                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2684         if (args->bitmask)
2685                 encode_getfattr(xdr, args->bitmask, &hdr);
2686         encode_delegreturn(xdr, args->stateid, &hdr);
2687         encode_nops(&hdr);
2688 }
2689
2690 /*
2691  * Encode FS_LOCATIONS request
2692  */
2693 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2694                                       struct xdr_stream *xdr,
2695                                       struct nfs4_fs_locations_arg *args)
2696 {
2697         struct compound_hdr hdr = {
2698                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2699         };
2700         uint32_t replen;
2701
2702         encode_compound_hdr(xdr, req, &hdr);
2703         encode_sequence(xdr, &args->seq_args, &hdr);
2704         if (args->migration) {
2705                 encode_putfh(xdr, args->fh, &hdr);
2706                 replen = hdr.replen;
2707                 encode_fs_locations(xdr, args->bitmask, &hdr);
2708                 if (args->renew)
2709                         encode_renew(xdr, args->clientid, &hdr);
2710         } else {
2711                 encode_putfh(xdr, args->dir_fh, &hdr);
2712                 encode_lookup(xdr, args->name, &hdr);
2713                 replen = hdr.replen;
2714                 encode_fs_locations(xdr, args->bitmask, &hdr);
2715         }
2716
2717         /* Set up reply kvec to capture returned fs_locations array. */
2718         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2719                         0, PAGE_SIZE);
2720         encode_nops(&hdr);
2721 }
2722
2723 /*
2724  * Encode SECINFO request
2725  */
2726 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2727                                 struct xdr_stream *xdr,
2728                                 struct nfs4_secinfo_arg *args)
2729 {
2730         struct compound_hdr hdr = {
2731                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2732         };
2733
2734         encode_compound_hdr(xdr, req, &hdr);
2735         encode_sequence(xdr, &args->seq_args, &hdr);
2736         encode_putfh(xdr, args->dir_fh, &hdr);
2737         encode_secinfo(xdr, args->name, &hdr);
2738         encode_nops(&hdr);
2739 }
2740
2741 /*
2742  * Encode FSID_PRESENT request
2743  */
2744 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2745                                       struct xdr_stream *xdr,
2746                                       struct nfs4_fsid_present_arg *args)
2747 {
2748         struct compound_hdr hdr = {
2749                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2750         };
2751
2752         encode_compound_hdr(xdr, req, &hdr);
2753         encode_sequence(xdr, &args->seq_args, &hdr);
2754         encode_putfh(xdr, args->fh, &hdr);
2755         encode_getfh(xdr, &hdr);
2756         if (args->renew)
2757                 encode_renew(xdr, args->clientid, &hdr);
2758         encode_nops(&hdr);
2759 }
2760
2761 #if defined(CONFIG_NFS_V4_1)
2762 /*
2763  * BIND_CONN_TO_SESSION request
2764  */
2765 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2766                                 struct xdr_stream *xdr,
2767                                 struct nfs41_bind_conn_to_session_args *args)
2768 {
2769         struct compound_hdr hdr = {
2770                 .minorversion = args->client->cl_mvops->minor_version,
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_bind_conn_to_session(xdr, args, &hdr);
2775         encode_nops(&hdr);
2776 }
2777
2778 /*
2779  * EXCHANGE_ID request
2780  */
2781 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2782                                      struct xdr_stream *xdr,
2783                                      struct nfs41_exchange_id_args *args)
2784 {
2785         struct compound_hdr hdr = {
2786                 .minorversion = args->client->cl_mvops->minor_version,
2787         };
2788
2789         encode_compound_hdr(xdr, req, &hdr);
2790         encode_exchange_id(xdr, args, &hdr);
2791         encode_nops(&hdr);
2792 }
2793
2794 /*
2795  * a CREATE_SESSION request
2796  */
2797 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2798                                         struct xdr_stream *xdr,
2799                                         struct nfs41_create_session_args *args)
2800 {
2801         struct compound_hdr hdr = {
2802                 .minorversion = args->client->cl_mvops->minor_version,
2803         };
2804
2805         encode_compound_hdr(xdr, req, &hdr);
2806         encode_create_session(xdr, args, &hdr);
2807         encode_nops(&hdr);
2808 }
2809
2810 /*
2811  * a DESTROY_SESSION request
2812  */
2813 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2814                                          struct xdr_stream *xdr,
2815                                          struct nfs4_session *session)
2816 {
2817         struct compound_hdr hdr = {
2818                 .minorversion = session->clp->cl_mvops->minor_version,
2819         };
2820
2821         encode_compound_hdr(xdr, req, &hdr);
2822         encode_destroy_session(xdr, session, &hdr);
2823         encode_nops(&hdr);
2824 }
2825
2826 /*
2827  * a DESTROY_CLIENTID request
2828  */
2829 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2830                                          struct xdr_stream *xdr,
2831                                          struct nfs_client *clp)
2832 {
2833         struct compound_hdr hdr = {
2834                 .minorversion = clp->cl_mvops->minor_version,
2835         };
2836
2837         encode_compound_hdr(xdr, req, &hdr);
2838         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2839         encode_nops(&hdr);
2840 }
2841
2842 /*
2843  * a SEQUENCE request
2844  */
2845 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2846                                   struct nfs4_sequence_args *args)
2847 {
2848         struct compound_hdr hdr = {
2849                 .minorversion = nfs4_xdr_minorversion(args),
2850         };
2851
2852         encode_compound_hdr(xdr, req, &hdr);
2853         encode_sequence(xdr, args, &hdr);
2854         encode_nops(&hdr);
2855 }
2856
2857 /*
2858  * a GET_LEASE_TIME request
2859  */
2860 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2861                                         struct xdr_stream *xdr,
2862                                         struct nfs4_get_lease_time_args *args)
2863 {
2864         struct compound_hdr hdr = {
2865                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2866         };
2867         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2868
2869         encode_compound_hdr(xdr, req, &hdr);
2870         encode_sequence(xdr, &args->la_seq_args, &hdr);
2871         encode_putrootfh(xdr, &hdr);
2872         encode_fsinfo(xdr, lease_bitmap, &hdr);
2873         encode_nops(&hdr);
2874 }
2875
2876 /*
2877  * a RECLAIM_COMPLETE request
2878  */
2879 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2880                                           struct xdr_stream *xdr,
2881                                 struct nfs41_reclaim_complete_args *args)
2882 {
2883         struct compound_hdr hdr = {
2884                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2885         };
2886
2887         encode_compound_hdr(xdr, req, &hdr);
2888         encode_sequence(xdr, &args->seq_args, &hdr);
2889         encode_reclaim_complete(xdr, args, &hdr);
2890         encode_nops(&hdr);
2891 }
2892
2893 /*
2894  * Encode GETDEVICEINFO request
2895  */
2896 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2897                                        struct xdr_stream *xdr,
2898                                        struct nfs4_getdeviceinfo_args *args)
2899 {
2900         struct compound_hdr hdr = {
2901                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902         };
2903
2904         encode_compound_hdr(xdr, req, &hdr);
2905         encode_sequence(xdr, &args->seq_args, &hdr);
2906         encode_getdeviceinfo(xdr, args, &hdr);
2907
2908         /* set up reply kvec. Subtract notification bitmap max size (2)
2909          * so that notification bitmap is put in xdr_buf tail */
2910         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2911                          args->pdev->pages, args->pdev->pgbase,
2912                          args->pdev->pglen);
2913
2914         encode_nops(&hdr);
2915 }
2916
2917 /*
2918  *  Encode LAYOUTGET request
2919  */
2920 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2921                                    struct xdr_stream *xdr,
2922                                    struct nfs4_layoutget_args *args)
2923 {
2924         struct compound_hdr hdr = {
2925                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926         };
2927
2928         encode_compound_hdr(xdr, req, &hdr);
2929         encode_sequence(xdr, &args->seq_args, &hdr);
2930         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2931         encode_layoutget(xdr, args, &hdr);
2932
2933         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2934             args->layout.pages, 0, args->layout.pglen);
2935
2936         encode_nops(&hdr);
2937 }
2938
2939 /*
2940  *  Encode LAYOUTCOMMIT request
2941  */
2942 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2943                                       struct xdr_stream *xdr,
2944                                       struct nfs4_layoutcommit_args *args)
2945 {
2946         struct nfs4_layoutcommit_data *data =
2947                 container_of(args, struct nfs4_layoutcommit_data, args);
2948         struct compound_hdr hdr = {
2949                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950         };
2951
2952         encode_compound_hdr(xdr, req, &hdr);
2953         encode_sequence(xdr, &args->seq_args, &hdr);
2954         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2956         encode_getfattr(xdr, args->bitmask, &hdr);
2957         encode_nops(&hdr);
2958 }
2959
2960 /*
2961  * Encode LAYOUTRETURN request
2962  */
2963 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2964                                       struct xdr_stream *xdr,
2965                                       struct nfs4_layoutreturn_args *args)
2966 {
2967         struct compound_hdr hdr = {
2968                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969         };
2970
2971         encode_compound_hdr(xdr, req, &hdr);
2972         encode_sequence(xdr, &args->seq_args, &hdr);
2973         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974         encode_layoutreturn(xdr, args, &hdr);
2975         encode_nops(&hdr);
2976 }
2977
2978 /*
2979  * Encode SECINFO_NO_NAME request
2980  */
2981 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2982                                         struct xdr_stream *xdr,
2983                                         struct nfs41_secinfo_no_name_args *args)
2984 {
2985         struct compound_hdr hdr = {
2986                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2987         };
2988
2989         encode_compound_hdr(xdr, req, &hdr);
2990         encode_sequence(xdr, &args->seq_args, &hdr);
2991         encode_putrootfh(xdr, &hdr);
2992         encode_secinfo_no_name(xdr, args, &hdr);
2993         encode_nops(&hdr);
2994         return 0;
2995 }
2996
2997 /*
2998  *  Encode TEST_STATEID request
2999  */
3000 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3001                                       struct xdr_stream *xdr,
3002                                       struct nfs41_test_stateid_args *args)
3003 {
3004         struct compound_hdr hdr = {
3005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006         };
3007
3008         encode_compound_hdr(xdr, req, &hdr);
3009         encode_sequence(xdr, &args->seq_args, &hdr);
3010         encode_test_stateid(xdr, args, &hdr);
3011         encode_nops(&hdr);
3012 }
3013
3014 /*
3015  *  Encode FREE_STATEID request
3016  */
3017 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3018                                      struct xdr_stream *xdr,
3019                                      struct nfs41_free_stateid_args *args)
3020 {
3021         struct compound_hdr hdr = {
3022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3023         };
3024
3025         encode_compound_hdr(xdr, req, &hdr);
3026         encode_sequence(xdr, &args->seq_args, &hdr);
3027         encode_free_stateid(xdr, args, &hdr);
3028         encode_nops(&hdr);
3029 }
3030 #endif /* CONFIG_NFS_V4_1 */
3031
3032 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3033 {
3034         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3035                 "Remaining buffer length is %tu words.\n",
3036                 func, xdr->end - xdr->p);
3037 }
3038
3039 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3040 {
3041         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3042                         NFS4_OPAQUE_LIMIT);
3043         if (unlikely(ret < 0)) {
3044                 if (ret == -EBADMSG)
3045                         print_overflow_msg(__func__, xdr);
3046                 return -EIO;
3047         }
3048         *len = ret;
3049         return 0;
3050 }
3051
3052 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3053 {
3054         __be32 *p;
3055
3056         p = xdr_inline_decode(xdr, 8);
3057         if (unlikely(!p))
3058                 goto out_overflow;
3059         hdr->status = be32_to_cpup(p++);
3060         hdr->taglen = be32_to_cpup(p);
3061
3062         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3063         if (unlikely(!p))
3064                 goto out_overflow;
3065         hdr->tag = (char *)p;
3066         p += XDR_QUADLEN(hdr->taglen);
3067         hdr->nops = be32_to_cpup(p);
3068         if (unlikely(hdr->nops < 1))
3069                 return nfs4_stat_to_errno(hdr->status);
3070         return 0;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3077                 int *nfs_retval)
3078 {
3079         __be32 *p;
3080         uint32_t opnum;
3081         int32_t nfserr;
3082
3083         p = xdr_inline_decode(xdr, 8);
3084         if (unlikely(!p))
3085                 goto out_overflow;
3086         opnum = be32_to_cpup(p++);
3087         if (unlikely(opnum != expected))
3088                 goto out_bad_operation;
3089         nfserr = be32_to_cpup(p);
3090         if (nfserr == NFS_OK)
3091                 *nfs_retval = 0;
3092         else
3093                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3094         return true;
3095 out_bad_operation:
3096         dprintk("nfs: Server returned operation"
3097                 " %d but we issued a request for %d\n",
3098                         opnum, expected);
3099         *nfs_retval = -EREMOTEIO;
3100         return false;
3101 out_overflow:
3102         print_overflow_msg(__func__, xdr);
3103         *nfs_retval = -EIO;
3104         return false;
3105 }
3106
3107 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3108 {
3109         int retval;
3110
3111         __decode_op_hdr(xdr, expected, &retval);
3112         return retval;
3113 }
3114
3115 /* Dummy routine */
3116 static int decode_ace(struct xdr_stream *xdr, void *ace)
3117 {
3118         __be32 *p;
3119         unsigned int strlen;
3120         char *str;
3121
3122         p = xdr_inline_decode(xdr, 12);
3123         if (likely(p))
3124                 return decode_opaque_inline(xdr, &strlen, &str);
3125         print_overflow_msg(__func__, xdr);
3126         return -EIO;
3127 }
3128
3129 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3130 {
3131         uint32_t bmlen;
3132         __be32 *p;
3133
3134         p = xdr_inline_decode(xdr, 4);
3135         if (unlikely(!p))
3136                 goto out_overflow;
3137         bmlen = be32_to_cpup(p);
3138
3139         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3140         p = xdr_inline_decode(xdr, (bmlen << 2));
3141         if (unlikely(!p))
3142                 goto out_overflow;
3143         if (bmlen > 0) {
3144                 bitmap[0] = be32_to_cpup(p++);
3145                 if (bmlen > 1) {
3146                         bitmap[1] = be32_to_cpup(p++);
3147                         if (bmlen > 2)
3148                                 bitmap[2] = be32_to_cpup(p);
3149                 }
3150         }
3151         return 0;
3152 out_overflow:
3153         print_overflow_msg(__func__, xdr);
3154         return -EIO;
3155 }
3156
3157 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3158 {
3159         __be32 *p;
3160
3161         p = xdr_inline_decode(xdr, 4);
3162         if (unlikely(!p))
3163                 goto out_overflow;
3164         *attrlen = be32_to_cpup(p);
3165         *savep = xdr_stream_pos(xdr);
3166         return 0;
3167 out_overflow:
3168         print_overflow_msg(__func__, xdr);
3169         return -EIO;
3170 }
3171
3172 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3173 {
3174         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3175                 int ret;
3176                 ret = decode_attr_bitmap(xdr, bitmask);
3177                 if (unlikely(ret < 0))
3178                         return ret;
3179                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3180         } else
3181                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3182         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3183                 bitmask[0], bitmask[1], bitmask[2]);
3184         return 0;
3185 }
3186
3187 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3188 {
3189         __be32 *p;
3190         int ret = 0;
3191
3192         *type = 0;
3193         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3194                 return -EIO;
3195         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3196                 p = xdr_inline_decode(xdr, 4);
3197                 if (unlikely(!p))
3198                         goto out_overflow;
3199                 *type = be32_to_cpup(p);
3200                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3201                         dprintk("%s: bad type %d\n", __func__, *type);
3202                         return -EIO;
3203                 }
3204                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3205                 ret = NFS_ATTR_FATTR_TYPE;
3206         }
3207         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3208         return ret;
3209 out_overflow:
3210         print_overflow_msg(__func__, xdr);
3211         return -EIO;
3212 }
3213
3214 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3215                                       uint32_t *bitmap, uint32_t *type)
3216 {
3217         __be32 *p;
3218
3219         *type = 0;
3220         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3221                 return -EIO;
3222         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3223                 p = xdr_inline_decode(xdr, 4);
3224                 if (unlikely(!p))
3225                         goto out_overflow;
3226                 *type = be32_to_cpup(p);
3227                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3228         }
3229         dprintk("%s: expire type=0x%x\n", __func__, *type);
3230         return 0;
3231 out_overflow:
3232         print_overflow_msg(__func__, xdr);
3233         return -EIO;
3234 }
3235
3236 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3237 {
3238         __be32 *p;
3239         int ret = 0;
3240
3241         *change = 0;
3242         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3243                 return -EIO;
3244         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3245                 p = xdr_inline_decode(xdr, 8);
3246                 if (unlikely(!p))
3247                         goto out_overflow;
3248                 xdr_decode_hyper(p, change);
3249                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3250                 ret = NFS_ATTR_FATTR_CHANGE;
3251         }
3252         dprintk("%s: change attribute=%Lu\n", __func__,
3253                         (unsigned long long)*change);
3254         return ret;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3261 {
3262         __be32 *p;
3263         int ret = 0;
3264
3265         *size = 0;
3266         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3267                 return -EIO;
3268         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3269                 p = xdr_inline_decode(xdr, 8);
3270                 if (unlikely(!p))
3271                         goto out_overflow;
3272                 xdr_decode_hyper(p, size);
3273                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3274                 ret = NFS_ATTR_FATTR_SIZE;
3275         }
3276         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3277         return ret;
3278 out_overflow:
3279         print_overflow_msg(__func__, xdr);
3280         return -EIO;
3281 }
3282
3283 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3284 {
3285         __be32 *p;
3286
3287         *res = 0;
3288         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3289                 return -EIO;
3290         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3291                 p = xdr_inline_decode(xdr, 4);
3292                 if (unlikely(!p))
3293                         goto out_overflow;
3294                 *res = be32_to_cpup(p);
3295                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3296         }
3297         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3298         return 0;
3299 out_overflow:
3300         print_overflow_msg(__func__, xdr);
3301         return -EIO;
3302 }
3303
3304 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3305 {
3306         __be32 *p;
3307
3308         *res = 0;
3309         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3310                 return -EIO;
3311         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3312                 p = xdr_inline_decode(xdr, 4);
3313                 if (unlikely(!p))
3314                         goto out_overflow;
3315                 *res = be32_to_cpup(p);
3316                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3317         }
3318         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3319         return 0;
3320 out_overflow:
3321         print_overflow_msg(__func__, xdr);
3322         return -EIO;
3323 }
3324
3325 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3326 {
3327         __be32 *p;
3328         int ret = 0;
3329
3330         fsid->major = 0;
3331         fsid->minor = 0;
3332         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3333                 return -EIO;
3334         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3335                 p = xdr_inline_decode(xdr, 16);
3336                 if (unlikely(!p))
3337                         goto out_overflow;
3338                 p = xdr_decode_hyper(p, &fsid->major);
3339                 xdr_decode_hyper(p, &fsid->minor);
3340                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3341                 ret = NFS_ATTR_FATTR_FSID;
3342         }
3343         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3344                         (unsigned long long)fsid->major,
3345                         (unsigned long long)fsid->minor);
3346         return ret;
3347 out_overflow:
3348         print_overflow_msg(__func__, xdr);
3349         return -EIO;
3350 }
3351
3352 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3353 {
3354         __be32 *p;
3355
3356         *res = 60;
3357         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3358                 return -EIO;
3359         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3360                 p = xdr_inline_decode(xdr, 4);
3361                 if (unlikely(!p))
3362                         goto out_overflow;
3363                 *res = be32_to_cpup(p);
3364                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3365         }
3366         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3367         return 0;
3368 out_overflow:
3369         print_overflow_msg(__func__, xdr);
3370         return -EIO;
3371 }
3372
3373 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3374 {
3375         __be32 *p;
3376
3377         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3378                 return -EIO;
3379         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3380                 p = xdr_inline_decode(xdr, 4);
3381                 if (unlikely(!p))
3382                         goto out_overflow;
3383                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3384                 *res = -be32_to_cpup(p);
3385         }
3386         return 0;
3387 out_overflow:
3388         print_overflow_msg(__func__, xdr);
3389         return -EIO;
3390 }
3391
3392 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3393                                  uint32_t *bitmap, uint32_t *bitmask)
3394 {
3395         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3396                 int ret;
3397                 ret = decode_attr_bitmap(xdr, bitmask);
3398                 if (unlikely(ret < 0))
3399                         return ret;
3400                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3401         } else
3402                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3403         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3404                 bitmask[0], bitmask[1], bitmask[2]);
3405         return 0;
3406 }
3407
3408 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3409 {
3410         __be32 *p;
3411         int len;
3412
3413         if (fh != NULL)
3414                 memset(fh, 0, sizeof(*fh));
3415
3416         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3417                 return -EIO;
3418         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3419                 p = xdr_inline_decode(xdr, 4);
3420                 if (unlikely(!p))
3421                         goto out_overflow;
3422                 len = be32_to_cpup(p);
3423                 if (len > NFS4_FHSIZE)
3424                         return -EIO;
3425                 p = xdr_inline_decode(xdr, len);
3426                 if (unlikely(!p))
3427                         goto out_overflow;
3428                 if (fh != NULL) {
3429                         memcpy(fh->data, p, len);
3430                         fh->size = len;
3431                 }
3432                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3433         }
3434         return 0;
3435 out_overflow:
3436         print_overflow_msg(__func__, xdr);
3437         return -EIO;
3438 }
3439
3440 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3441 {
3442         __be32 *p;
3443
3444         *res = 0;
3445         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3446                 return -EIO;
3447         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3448                 p = xdr_inline_decode(xdr, 4);
3449                 if (unlikely(!p))
3450                         goto out_overflow;
3451                 *res = be32_to_cpup(p);
3452                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3453         }
3454         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3455         return 0;
3456 out_overflow:
3457         print_overflow_msg(__func__, xdr);
3458         return -EIO;
3459 }
3460
3461 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3462 {
3463         __be32 *p;
3464         int ret = 0;
3465
3466         *fileid = 0;
3467         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3468                 return -EIO;
3469         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3470                 p = xdr_inline_decode(xdr, 8);
3471                 if (unlikely(!p))
3472                         goto out_overflow;
3473                 xdr_decode_hyper(p, fileid);
3474                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3475                 ret = NFS_ATTR_FATTR_FILEID;
3476         }
3477         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3478         return ret;
3479 out_overflow:
3480         print_overflow_msg(__func__, xdr);
3481         return -EIO;
3482 }
3483
3484 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3485 {
3486         __be32 *p;
3487         int ret = 0;
3488
3489         *fileid = 0;
3490         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3491                 return -EIO;
3492         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3493                 p = xdr_inline_decode(xdr, 8);
3494                 if (unlikely(!p))
3495                         goto out_overflow;
3496                 xdr_decode_hyper(p, fileid);
3497                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3498                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3499         }
3500         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3501         return ret;
3502 out_overflow:
3503         print_overflow_msg(__func__, xdr);
3504         return -EIO;
3505 }
3506
3507 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3508 {
3509         __be32 *p;
3510         int status = 0;
3511
3512         *res = 0;
3513         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3514                 return -EIO;
3515         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3516                 p = xdr_inline_decode(xdr, 8);
3517                 if (unlikely(!p))
3518                         goto out_overflow;
3519                 xdr_decode_hyper(p, res);
3520                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3521         }
3522         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3523         return status;
3524 out_overflow:
3525         print_overflow_msg(__func__, xdr);
3526         return -EIO;
3527 }
3528
3529 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3530 {
3531         __be32 *p;
3532         int status = 0;
3533
3534         *res = 0;
3535         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3536                 return -EIO;
3537         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3538                 p = xdr_inline_decode(xdr, 8);
3539                 if (unlikely(!p))
3540                         goto out_overflow;
3541                 xdr_decode_hyper(p, res);
3542                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3543         }
3544         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3545         return status;
3546 out_overflow:
3547         print_overflow_msg(__func__, xdr);
3548         return -EIO;
3549 }
3550
3551 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3552 {
3553         __be32 *p;
3554         int status = 0;
3555
3556         *res = 0;
3557         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3558                 return -EIO;
3559         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3560                 p = xdr_inline_decode(xdr, 8);
3561                 if (unlikely(!p))
3562                         goto out_overflow;
3563                 xdr_decode_hyper(p, res);
3564                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3565         }
3566         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3567         return status;
3568 out_overflow:
3569         print_overflow_msg(__func__, xdr);
3570         return -EIO;
3571 }
3572
3573 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3574 {
3575         u32 n;
3576         __be32 *p;
3577         int status = 0;
3578
3579         p = xdr_inline_decode(xdr, 4);
3580         if (unlikely(!p))
3581                 goto out_overflow;
3582         n = be32_to_cpup(p);
3583         if (n == 0)
3584                 goto root_path;
3585         dprintk("pathname4: ");
3586         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3587                 dprintk("cannot parse %d components in path\n", n);
3588                 goto out_eio;
3589         }
3590         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3591                 struct nfs4_string *component = &path->components[path->ncomponents];
3592                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3593                 if (unlikely(status != 0))
3594                         goto out_eio;
3595                 ifdebug (XDR)
3596                         pr_cont("%s%.*s ",
3597                                 (path->ncomponents != n ? "/ " : ""),
3598                                 component->len, component->data);
3599         }
3600 out:
3601         return status;
3602 root_path:
3603 /* a root pathname is sent as a zero component4 */
3604         path->ncomponents = 1;
3605         path->components[0].len=0;
3606         path->components[0].data=NULL;
3607         dprintk("pathname4: /\n");
3608         goto out;
3609 out_eio:
3610         dprintk(" status %d", status);
3611         status = -EIO;
3612         goto out;
3613 out_overflow:
3614         print_overflow_msg(__func__, xdr);
3615         return -EIO;
3616 }
3617
3618 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3619 {
3620         int n;
3621         __be32 *p;
3622         int status = -EIO;
3623
3624         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3625                 goto out;
3626         status = 0;
3627         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3628                 goto out;
3629         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3630         status = -EIO;
3631         /* Ignore borken servers that return unrequested attrs */
3632         if (unlikely(res == NULL))
3633                 goto out;
3634         dprintk("%s: fsroot:\n", __func__);
3635         status = decode_pathname(xdr, &res->fs_path);
3636         if (unlikely(status != 0))
3637                 goto out;
3638         p = xdr_inline_decode(xdr, 4);
3639         if (unlikely(!p))
3640                 goto out_overflow;
3641         n = be32_to_cpup(p);
3642         if (n <= 0)
3643                 goto out_eio;
3644         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3645                 u32 m;
3646                 struct nfs4_fs_location *loc;
3647
3648                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3649                         break;
3650                 loc = &res->locations[res->nlocations];
3651                 p = xdr_inline_decode(xdr, 4);
3652                 if (unlikely(!p))
3653                         goto out_overflow;
3654                 m = be32_to_cpup(p);
3655
3656                 dprintk("%s: servers:\n", __func__);
3657                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3658                         struct nfs4_string *server;
3659
3660                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3661                                 unsigned int i;
3662                                 dprintk("%s: using first %u of %u servers "
3663                                         "returned for location %u\n",
3664                                                 __func__,
3665                                                 NFS4_FS_LOCATION_MAXSERVERS,
3666                                                 m, res->nlocations);
3667                                 for (i = loc->nservers; i < m; i++) {
3668                                         unsigned int len;
3669                                         char *data;
3670                                         status = decode_opaque_inline(xdr, &len, &data);
3671                                         if (unlikely(status != 0))
3672                                                 goto out_eio;
3673                                 }
3674                                 break;
3675                         }
3676                         server = &loc->servers[loc->nservers];
3677                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3678                         if (unlikely(status != 0))
3679                                 goto out_eio;
3680                         dprintk("%s ", server->data);
3681                 }
3682                 status = decode_pathname(xdr, &loc->rootpath);
3683                 if (unlikely(status != 0))
3684                         goto out_eio;
3685         }
3686         if (res->nlocations != 0)
3687                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3688 out:
3689         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3690         return status;
3691 out_overflow:
3692         print_overflow_msg(__func__, xdr);
3693 out_eio:
3694         status = -EIO;
3695         goto out;
3696 }
3697
3698 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3699 {
3700         __be32 *p;
3701         int status = 0;
3702
3703         *res = 0;
3704         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3705                 return -EIO;
3706         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3707                 p = xdr_inline_decode(xdr, 8);
3708                 if (unlikely(!p))
3709                         goto out_overflow;
3710                 xdr_decode_hyper(p, res);
3711                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3712         }
3713         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3714         return status;
3715 out_overflow:
3716         print_overflow_msg(__func__, xdr);
3717         return -EIO;
3718 }
3719
3720 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3721 {
3722         __be32 *p;
3723         int status = 0;
3724
3725         *maxlink = 1;
3726         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3727                 return -EIO;
3728         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3729                 p = xdr_inline_decode(xdr, 4);
3730                 if (unlikely(!p))
3731                         goto out_overflow;
3732                 *maxlink = be32_to_cpup(p);
3733                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3734         }
3735         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3736         return status;
3737 out_overflow:
3738         print_overflow_msg(__func__, xdr);
3739         return -EIO;
3740 }
3741
3742 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3743 {
3744         __be32 *p;
3745         int status = 0;
3746
3747         *maxname = 1024;
3748         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3749                 return -EIO;
3750         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3751                 p = xdr_inline_decode(xdr, 4);
3752                 if (unlikely(!p))
3753                         goto out_overflow;
3754                 *maxname = be32_to_cpup(p);
3755                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3756         }
3757         dprintk("%s: maxname=%u\n", __func__, *maxname);
3758         return status;
3759 out_overflow:
3760         print_overflow_msg(__func__, xdr);
3761         return -EIO;
3762 }
3763
3764 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3765 {
3766         __be32 *p;
3767         int status = 0;
3768
3769         *res = 1024;
3770         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3771                 return -EIO;
3772         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3773                 uint64_t maxread;
3774                 p = xdr_inline_decode(xdr, 8);
3775                 if (unlikely(!p))
3776                         goto out_overflow;
3777                 xdr_decode_hyper(p, &maxread);
3778                 if (maxread > 0x7FFFFFFF)
3779                         maxread = 0x7FFFFFFF;
3780                 *res = (uint32_t)maxread;
3781                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3782         }
3783         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3784         return status;
3785 out_overflow:
3786         print_overflow_msg(__func__, xdr);
3787         return -EIO;
3788 }
3789
3790 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791 {
3792         __be32 *p;
3793         int status = 0;
3794
3795         *res = 1024;
3796         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3797                 return -EIO;
3798         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3799                 uint64_t maxwrite;
3800                 p = xdr_inline_decode(xdr, 8);
3801                 if (unlikely(!p))
3802                         goto out_overflow;
3803                 xdr_decode_hyper(p, &maxwrite);
3804                 if (maxwrite > 0x7FFFFFFF)
3805                         maxwrite = 0x7FFFFFFF;
3806                 *res = (uint32_t)maxwrite;
3807                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3808         }
3809         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3810         return status;
3811 out_overflow:
3812         print_overflow_msg(__func__, xdr);
3813         return -EIO;
3814 }
3815
3816 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3817 {
3818         uint32_t tmp;
3819         __be32 *p;
3820         int ret = 0;
3821
3822         *mode = 0;
3823         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3824                 return -EIO;
3825         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3826                 p = xdr_inline_decode(xdr, 4);
3827                 if (unlikely(!p))
3828                         goto out_overflow;
3829                 tmp = be32_to_cpup(p);
3830                 *mode = tmp & ~S_IFMT;
3831                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3832                 ret = NFS_ATTR_FATTR_MODE;
3833         }
3834         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3835         return ret;
3836 out_overflow:
3837         print_overflow_msg(__func__, xdr);
3838         return -EIO;
3839 }
3840
3841 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3842 {
3843         __be32 *p;
3844         int ret = 0;
3845
3846         *nlink = 1;
3847         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3848                 return -EIO;
3849         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3850                 p = xdr_inline_decode(xdr, 4);
3851                 if (unlikely(!p))
3852                         goto out_overflow;
3853                 *nlink = be32_to_cpup(p);
3854                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3855                 ret = NFS_ATTR_FATTR_NLINK;
3856         }
3857         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3858         return ret;
3859 out_overflow:
3860         print_overflow_msg(__func__, xdr);
3861         return -EIO;
3862 }
3863
3864 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3865                 struct nfs4_string *name, gfp_t gfp_flags)
3866 {
3867         ssize_t ret;
3868
3869         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3870                         XDR_MAX_NETOBJ, gfp_flags);
3871         name->len = 0;
3872         if (ret > 0)
3873                 name->len = ret;
3874         return ret;
3875 }
3876
3877 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3878                 const struct nfs_server *server, kuid_t *uid,
3879                 struct nfs4_string *owner_name)
3880 {
3881         ssize_t len;
3882         char *p;
3883
3884         *uid = make_kuid(&init_user_ns, -2);
3885         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3886                 return -EIO;
3887         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3888                 return 0;
3889         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3890
3891         if (owner_name != NULL) {
3892                 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3893                 if (len <= 0)
3894                         goto out;
3895                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3896                 return NFS_ATTR_FATTR_OWNER_NAME;
3897         } else {
3898                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3899                                 XDR_MAX_NETOBJ);
3900                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3901                         goto out;
3902                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3903                 return NFS_ATTR_FATTR_OWNER;
3904         }
3905 out:
3906         if (len != -EBADMSG)
3907                 return 0;
3908         print_overflow_msg(__func__, xdr);
3909         return -EIO;
3910 }
3911
3912 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3913                 const struct nfs_server *server, kgid_t *gid,
3914                 struct nfs4_string *group_name)
3915 {
3916         ssize_t len;
3917         char *p;
3918
3919         *gid = make_kgid(&init_user_ns, -2);
3920         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3921                 return -EIO;
3922         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3923                 return 0;
3924         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3925
3926         if (group_name != NULL) {
3927                 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
3928                 if (len <= 0)
3929                         goto out;
3930                 dprintk("%s: name=%s\n", __func__, group_name->data);
3931                 return NFS_ATTR_FATTR_GROUP_NAME;
3932         } else {
3933                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3934                                 XDR_MAX_NETOBJ);
3935                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3936                         goto out;
3937                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3938                 return NFS_ATTR_FATTR_GROUP;
3939         }
3940 out:
3941         if (len != -EBADMSG)
3942                 return 0;
3943         print_overflow_msg(__func__, xdr);
3944         return -EIO;
3945 }
3946
3947 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3948 {
3949         uint32_t major = 0, minor = 0;
3950         __be32 *p;
3951         int ret = 0;
3952
3953         *rdev = MKDEV(0,0);
3954         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3955                 return -EIO;
3956         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3957                 dev_t tmp;
3958
3959                 p = xdr_inline_decode(xdr, 8);
3960                 if (unlikely(!p))
3961                         goto out_overflow;
3962                 major = be32_to_cpup(p++);
3963                 minor = be32_to_cpup(p);
3964                 tmp = MKDEV(major, minor);
3965                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3966                         *rdev = tmp;
3967                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3968                 ret = NFS_ATTR_FATTR_RDEV;
3969         }
3970         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3971         return ret;
3972 out_overflow:
3973         print_overflow_msg(__func__, xdr);
3974         return -EIO;
3975 }
3976
3977 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3978 {
3979         __be32 *p;
3980         int status = 0;
3981
3982         *res = 0;
3983         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3984                 return -EIO;
3985         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3986                 p = xdr_inline_decode(xdr, 8);
3987                 if (unlikely(!p))
3988                         goto out_overflow;
3989                 xdr_decode_hyper(p, res);
3990                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3991         }
3992         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3993         return status;
3994 out_overflow:
3995         print_overflow_msg(__func__, xdr);
3996         return -EIO;
3997 }
3998
3999 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4000 {
4001         __be32 *p;
4002         int status = 0;
4003
4004         *res = 0;
4005         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4006                 return -EIO;
4007         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4008                 p = xdr_inline_decode(xdr, 8);
4009                 if (unlikely(!p))
4010                         goto out_overflow;
4011                 xdr_decode_hyper(p, res);
4012                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4013         }
4014         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4015         return status;
4016 out_overflow:
4017         print_overflow_msg(__func__, xdr);
4018         return -EIO;
4019 }
4020
4021 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4022 {
4023         __be32 *p;
4024         int status = 0;
4025
4026         *res = 0;
4027         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4028                 return -EIO;
4029         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4030                 p = xdr_inline_decode(xdr, 8);
4031                 if (unlikely(!p))
4032                         goto out_overflow;
4033                 xdr_decode_hyper(p, res);
4034                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4035         }
4036         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4037         return status;
4038 out_overflow:
4039         print_overflow_msg(__func__, xdr);
4040         return -EIO;
4041 }
4042
4043 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044 {
4045         __be32 *p;
4046         int ret = 0;
4047
4048         *used = 0;
4049         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050                 return -EIO;
4051         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052                 p = xdr_inline_decode(xdr, 8);
4053                 if (unlikely(!p))
4054                         goto out_overflow;
4055                 xdr_decode_hyper(p, used);
4056                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057                 ret = NFS_ATTR_FATTR_SPACE_USED;
4058         }
4059         dprintk("%s: space used=%Lu\n", __func__,
4060                         (unsigned long long)*used);
4061         return ret;
4062 out_overflow:
4063         print_overflow_msg(__func__, xdr);
4064         return -EIO;
4065 }
4066
4067 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4068 {
4069         __be32 *p;
4070         uint64_t sec;
4071         uint32_t nsec;
4072
4073         p = xdr_inline_decode(xdr, 12);
4074         if (unlikely(!p))
4075                 goto out_overflow;
4076         p = xdr_decode_hyper(p, &sec);
4077         nsec = be32_to_cpup(p);
4078         time->tv_sec = (time_t)sec;
4079         time->tv_nsec = (long)nsec;
4080         return 0;
4081 out_overflow:
4082         print_overflow_msg(__func__, xdr);
4083         return -EIO;
4084 }
4085
4086 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4087 {
4088         int status = 0;
4089
4090         time->tv_sec = 0;
4091         time->tv_nsec = 0;
4092         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093                 return -EIO;
4094         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095                 status = decode_attr_time(xdr, time);
4096                 if (status == 0)
4097                         status = NFS_ATTR_FATTR_ATIME;
4098                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099         }
4100         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4101         return status;
4102 }
4103
4104 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4105 {
4106         int status = 0;
4107
4108         time->tv_sec = 0;
4109         time->tv_nsec = 0;
4110         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111                 return -EIO;
4112         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113                 status = decode_attr_time(xdr, time);
4114                 if (status == 0)
4115                         status = NFS_ATTR_FATTR_CTIME;
4116                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117         }
4118         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4119         return status;
4120 }
4121
4122 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123                                   struct timespec *time)
4124 {
4125         int status = 0;
4126
4127         time->tv_sec = 0;
4128         time->tv_nsec = 0;
4129         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130                 return -EIO;
4131         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132                 status = decode_attr_time(xdr, time);
4133                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134         }
4135         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4136                 (long)time->tv_nsec);
4137         return status;
4138 }
4139
4140 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141                                         struct nfs4_label *label)
4142 {
4143         uint32_t pi = 0;
4144         uint32_t lfs = 0;
4145         __u32 len;
4146         __be32 *p;
4147         int status = 0;
4148
4149         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150                 return -EIO;
4151         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         goto out_overflow;
4155                 lfs = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, 4);
4157                 if (unlikely(!p))
4158                         goto out_overflow;
4159                 pi = be32_to_cpup(p++);
4160                 p = xdr_inline_decode(xdr, 4);
4161                 if (unlikely(!p))
4162                         goto out_overflow;
4163                 len = be32_to_cpup(p++);
4164                 p = xdr_inline_decode(xdr, len);
4165                 if (unlikely(!p))
4166                         goto out_overflow;
4167                 if (len < NFS4_MAXLABELLEN) {
4168                         if (label) {
4169                                 memcpy(label->label, p, len);
4170                                 label->len = len;
4171                                 label->pi = pi;
4172                                 label->lfs = lfs;
4173                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4174                         }
4175                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4176                 } else
4177                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4178                                         __func__, len);
4179         }
4180         if (label && label->label)
4181                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4182                         (char *)label->label, label->len, label->pi, label->lfs);
4183         return status;
4184
4185 out_overflow:
4186         print_overflow_msg(__func__, xdr);
4187         return -EIO;
4188 }
4189
4190 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4191 {
4192         int status = 0;
4193
4194         time->tv_sec = 0;
4195         time->tv_nsec = 0;
4196         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4197                 return -EIO;
4198         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4199                 status = decode_attr_time(xdr, time);
4200                 if (status == 0)
4201                         status = NFS_ATTR_FATTR_MTIME;
4202                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4203         }
4204         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4205         return status;
4206 }
4207
4208 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4209 {
4210         unsigned int attrwords = XDR_QUADLEN(attrlen);
4211         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4212
4213         if (unlikely(attrwords != nwords)) {
4214                 dprintk("%s: server returned incorrect attribute length: "
4215                         "%u %c %u\n",
4216                                 __func__,
4217                                 attrwords << 2,
4218                                 (attrwords < nwords) ? '<' : '>',
4219                                 nwords << 2);
4220                 return -EIO;
4221         }
4222         return 0;
4223 }
4224
4225 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4226 {
4227         __be32 *p;
4228
4229         p = xdr_inline_decode(xdr, 20);
4230         if (unlikely(!p))
4231                 goto out_overflow;
4232         cinfo->atomic = be32_to_cpup(p++);
4233         p = xdr_decode_hyper(p, &cinfo->before);
4234         xdr_decode_hyper(p, &cinfo->after);
4235         return 0;
4236 out_overflow:
4237         print_overflow_msg(__func__, xdr);
4238         return -EIO;
4239 }
4240
4241 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4242 {
4243         __be32 *p;
4244         uint32_t supp, acc;
4245         int status;
4246
4247         status = decode_op_hdr(xdr, OP_ACCESS);
4248         if (status)
4249                 return status;
4250         p = xdr_inline_decode(xdr, 8);
4251         if (unlikely(!p))
4252                 goto out_overflow;
4253         supp = be32_to_cpup(p++);
4254         acc = be32_to_cpup(p);
4255         *supported = supp;
4256         *access = acc;
4257         return 0;
4258 out_overflow:
4259         print_overflow_msg(__func__, xdr);
4260         return -EIO;
4261 }
4262
4263 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4264 {
4265         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4266         if (unlikely(ret < 0)) {
4267                 print_overflow_msg(__func__, xdr);
4268                 return -EIO;
4269         }
4270         return 0;
4271 }
4272
4273 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4274 {
4275         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4276 }
4277
4278 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280         stateid->type = NFS4_OPEN_STATEID_TYPE;
4281         return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286         stateid->type = NFS4_LOCK_STATEID_TYPE;
4287         return decode_stateid(xdr, stateid);
4288 }
4289
4290 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291 {
4292         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4293         return decode_stateid(xdr, stateid);
4294 }
4295
4296 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4297 {
4298         int status;
4299
4300         status = decode_op_hdr(xdr, OP_CLOSE);
4301         if (status != -EIO)
4302                 nfs_increment_open_seqid(status, res->seqid);
4303         if (!status)
4304                 status = decode_open_stateid(xdr, &res->stateid);
4305         return status;
4306 }
4307
4308 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4309 {
4310         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4314 {
4315         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4316 }
4317
4318 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4319 {
4320         int status;
4321
4322         status = decode_op_hdr(xdr, OP_COMMIT);
4323         if (!status)
4324                 status = decode_write_verifier(xdr, &res->verf->verifier);
4325         return status;
4326 }
4327
4328 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4329 {
4330         __be32 *p;
4331         uint32_t bmlen;
4332         int status;
4333
4334         status = decode_op_hdr(xdr, OP_CREATE);
4335         if (status)
4336                 return status;
4337         if ((status = decode_change_info(xdr, cinfo)))
4338                 return status;
4339         p = xdr_inline_decode(xdr, 4);
4340         if (unlikely(!p))
4341                 goto out_overflow;
4342         bmlen = be32_to_cpup(p);
4343         p = xdr_inline_decode(xdr, bmlen << 2);
4344         if (likely(p))
4345                 return 0;
4346 out_overflow:
4347         print_overflow_msg(__func__, xdr);
4348         return -EIO;
4349 }
4350
4351 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4352 {
4353         unsigned int savep;
4354         uint32_t attrlen, bitmap[3] = {0};
4355         int status;
4356
4357         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4364                 goto xdr_error;
4365         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4366                                                  &res->fh_expire_type)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4369                 goto xdr_error;
4370         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4371                 goto xdr_error;
4372         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4373                 goto xdr_error;
4374         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4375                                 res->exclcreat_bitmask)) != 0)
4376                 goto xdr_error;
4377         status = verify_attr_len(xdr, savep, attrlen);
4378 xdr_error:
4379         dprintk("%s: xdr returned %d!\n", __func__, -status);
4380         return status;
4381 }
4382
4383 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4384 {
4385         unsigned int savep;
4386         uint32_t attrlen, bitmap[3] = {0};
4387         int status;
4388
4389         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4390                 goto xdr_error;
4391         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4394                 goto xdr_error;
4395
4396         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4397                 goto xdr_error;
4398         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4399                 goto xdr_error;
4400         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4401                 goto xdr_error;
4402
4403         status = -EIO;
4404         if (unlikely(bitmap[0]))
4405                 goto xdr_error;
4406
4407         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4410                 goto xdr_error;
4411         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4412                 goto xdr_error;
4413
4414         status = verify_attr_len(xdr, savep, attrlen);
4415 xdr_error:
4416         dprintk("%s: xdr returned %d!\n", __func__, -status);
4417         return status;
4418 }
4419
4420 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4421 {
4422         unsigned int savep;
4423         uint32_t attrlen, bitmap[3] = {0};
4424         int status;
4425
4426         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4427                 goto xdr_error;
4428         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4429                 goto xdr_error;
4430         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4431                 goto xdr_error;
4432
4433         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4434                 goto xdr_error;
4435         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4436                 goto xdr_error;
4437
4438         status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440         dprintk("%s: xdr returned %d!\n", __func__, -status);
4441         return status;
4442 }
4443
4444 static int decode_threshold_hint(struct xdr_stream *xdr,
4445                                   uint32_t *bitmap,
4446                                   uint64_t *res,
4447                                   uint32_t hint_bit)
4448 {
4449         __be32 *p;
4450
4451         *res = 0;
4452         if (likely(bitmap[0] & hint_bit)) {
4453                 p = xdr_inline_decode(xdr, 8);
4454                 if (unlikely(!p))
4455                         goto out_overflow;
4456                 xdr_decode_hyper(p, res);
4457         }
4458         return 0;
4459 out_overflow:
4460         print_overflow_msg(__func__, xdr);
4461         return -EIO;
4462 }
4463
4464 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4465                                         struct nfs4_threshold *res)
4466 {
4467         __be32 *p;
4468         unsigned int savep;
4469         uint32_t bitmap[3] = {0,}, attrlen;
4470         int status;
4471
4472         /* layout type */
4473         p = xdr_inline_decode(xdr, 4);
4474         if (unlikely(!p)) {
4475                 print_overflow_msg(__func__, xdr);
4476                 return -EIO;
4477         }
4478         res->l_type = be32_to_cpup(p);
4479
4480         /* thi_hintset bitmap */
4481         status = decode_attr_bitmap(xdr, bitmap);
4482         if (status < 0)
4483                 goto xdr_error;
4484
4485         /* thi_hintlist length */
4486         status = decode_attr_length(xdr, &attrlen, &savep);
4487         if (status < 0)
4488                 goto xdr_error;
4489         /* thi_hintlist */
4490         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4491         if (status < 0)
4492                 goto xdr_error;
4493         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4494         if (status < 0)
4495                 goto xdr_error;
4496         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4497                                        THRESHOLD_RD_IO);
4498         if (status < 0)
4499                 goto xdr_error;
4500         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4501                                        THRESHOLD_WR_IO);
4502         if (status < 0)
4503                 goto xdr_error;
4504
4505         status = verify_attr_len(xdr, savep, attrlen);
4506         res->bm = bitmap[0];
4507
4508         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4509                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4510                 res->wr_io_sz);
4511 xdr_error:
4512         dprintk("%s ret=%d!\n", __func__, status);
4513         return status;
4514 }
4515
4516 /*
4517  * Thresholds on pNFS direct I/O vrs MDS I/O
4518  */
4519 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4520                                     uint32_t *bitmap,
4521                                     struct nfs4_threshold *res)
4522 {
4523         __be32 *p;
4524         int status = 0;
4525         uint32_t num;
4526
4527         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4528                 return -EIO;
4529         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4530                 /* Did the server return an unrequested attribute? */
4531                 if (unlikely(res == NULL))
4532                         return -EREMOTEIO;
4533                 p = xdr_inline_decode(xdr, 4);
4534                 if (unlikely(!p))
4535                         goto out_overflow;
4536                 num = be32_to_cpup(p);
4537                 if (num == 0)
4538                         return 0;
4539                 if (num > 1)
4540                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4541                                 "drivers per filesystem not supported\n",
4542                                 __func__);
4543
4544                 status = decode_first_threshold_item4(xdr, res);
4545                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4546         }
4547         return status;
4548 out_overflow:
4549         print_overflow_msg(__func__, xdr);
4550         return -EIO;
4551 }
4552
4553 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4554                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4555                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4556                 const struct nfs_server *server)
4557 {
4558         int status;
4559         umode_t fmode = 0;
4560         uint32_t type;
4561         int32_t err;
4562
4563         status = decode_attr_type(xdr, bitmap, &type);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->mode = 0;
4567         if (status != 0) {
4568                 fattr->mode |= nfs_type2fmt[type];
4569                 fattr->valid |= status;
4570         }
4571
4572         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4573         if (status < 0)
4574                 goto xdr_error;
4575         fattr->valid |= status;
4576
4577         status = decode_attr_size(xdr, bitmap, &fattr->size);
4578         if (status < 0)
4579                 goto xdr_error;
4580         fattr->valid |= status;
4581
4582         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4583         if (status < 0)
4584                 goto xdr_error;
4585         fattr->valid |= status;
4586
4587         err = 0;
4588         status = decode_attr_error(xdr, bitmap, &err);
4589         if (status < 0)
4590                 goto xdr_error;
4591
4592         status = decode_attr_filehandle(xdr, bitmap, fh);
4593         if (status < 0)
4594                 goto xdr_error;
4595
4596         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->valid |= status;
4600
4601         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4602         if (status < 0)
4603                 goto xdr_error;
4604         fattr->valid |= status;
4605
4606         status = -EIO;
4607         if (unlikely(bitmap[0]))
4608                 goto xdr_error;
4609
4610         status = decode_attr_mode(xdr, bitmap, &fmode);
4611         if (status < 0)
4612                 goto xdr_error;
4613         if (status != 0) {
4614                 fattr->mode |= fmode;
4615                 fattr->valid |= status;
4616         }
4617
4618         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4619         if (status < 0)
4620                 goto xdr_error;
4621         fattr->valid |= status;
4622
4623         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4624         if (status < 0)
4625                 goto xdr_error;
4626         fattr->valid |= status;
4627
4628         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4629         if (status < 0)
4630                 goto xdr_error;
4631         fattr->valid |= status;
4632
4633         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4634         if (status < 0)
4635                 goto xdr_error;
4636         fattr->valid |= status;
4637
4638         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4639         if (status < 0)
4640                 goto xdr_error;
4641         fattr->valid |= status;
4642
4643         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4644         if (status < 0)
4645                 goto xdr_error;
4646         fattr->valid |= status;
4647
4648         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4649         if (status < 0)
4650                 goto xdr_error;
4651         fattr->valid |= status;
4652
4653         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4654         if (status < 0)
4655                 goto xdr_error;
4656         fattr->valid |= status;
4657
4658         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4659         if (status < 0)
4660                 goto xdr_error;
4661         fattr->valid |= status;
4662
4663         status = -EIO;
4664         if (unlikely(bitmap[1]))
4665                 goto xdr_error;
4666
4667         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4668         if (status < 0)
4669                 goto xdr_error;
4670
4671         if (label) {
4672                 status = decode_attr_security_label(xdr, bitmap, label);
4673                 if (status < 0)
4674                         goto xdr_error;
4675                 fattr->valid |= status;
4676         }
4677
4678 xdr_error:
4679         dprintk("%s: xdr returned %d\n", __func__, -status);
4680         return status;
4681 }
4682
4683 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4684                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4685                 struct nfs4_label *label, const struct nfs_server *server)
4686 {
4687         unsigned int savep;
4688         uint32_t attrlen,
4689                  bitmap[3] = {0};
4690         int status;
4691
4692         status = decode_op_hdr(xdr, OP_GETATTR);
4693         if (status < 0)
4694                 goto xdr_error;
4695
4696         status = decode_attr_bitmap(xdr, bitmap);
4697         if (status < 0)
4698                 goto xdr_error;
4699
4700         status = decode_attr_length(xdr, &attrlen, &savep);
4701         if (status < 0)
4702                 goto xdr_error;
4703
4704         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4705                                         label, server);
4706         if (status < 0)
4707                 goto xdr_error;
4708
4709         status = verify_attr_len(xdr, savep, attrlen);
4710 xdr_error:
4711         dprintk("%s: xdr returned %d\n", __func__, -status);
4712         return status;
4713 }
4714
4715 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4716                 struct nfs4_label *label, const struct nfs_server *server)
4717 {
4718         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4719 }
4720
4721 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4722                 const struct nfs_server *server)
4723 {
4724         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4725 }
4726
4727 /*
4728  * Decode potentially multiple layout types.
4729  */
4730 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4731                                     struct nfs_fsinfo *fsinfo)
4732 {
4733         __be32 *p;
4734         uint32_t i;
4735
4736         p = xdr_inline_decode(xdr, 4);
4737         if (unlikely(!p))
4738                 goto out_overflow;
4739         fsinfo->nlayouttypes = be32_to_cpup(p);
4740
4741         /* pNFS is not supported by the underlying file system */
4742         if (fsinfo->nlayouttypes == 0)
4743                 return 0;
4744
4745         /* Decode and set first layout type, move xdr->p past unused types */
4746         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4747         if (unlikely(!p))
4748                 goto out_overflow;
4749
4750         /* If we get too many, then just cap it at the max */
4751         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4752                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4753                         __func__, fsinfo->nlayouttypes);
4754                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4755         }
4756
4757         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4758                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4759         return 0;
4760 out_overflow:
4761         print_overflow_msg(__func__, xdr);
4762         return -EIO;
4763 }
4764
4765 /*
4766  * The type of file system exported.
4767  * Note we must ensure that layouttype is set in any non-error case.
4768  */
4769 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4770                                 struct nfs_fsinfo *fsinfo)
4771 {
4772         int status = 0;
4773
4774         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4775         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4776                 return -EIO;
4777         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4778                 status = decode_pnfs_layout_types(xdr, fsinfo);
4779                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4780         }
4781         return status;
4782 }
4783
4784 /*
4785  * The prefered block size for layout directed io
4786  */
4787 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4788                                       uint32_t *res)
4789 {
4790         __be32 *p;
4791
4792         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4793         *res = 0;
4794         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4795                 p = xdr_inline_decode(xdr, 4);
4796                 if (unlikely(!p)) {
4797                         print_overflow_msg(__func__, xdr);
4798                         return -EIO;
4799                 }
4800                 *res = be32_to_cpup(p);
4801                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4802         }
4803         return 0;
4804 }
4805
4806 /*
4807  * The granularity of a CLONE operation.
4808  */
4809 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4810                                      uint32_t *res)
4811 {
4812         __be32 *p;
4813
4814         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4815         *res = 0;
4816         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4817                 p = xdr_inline_decode(xdr, 4);
4818                 if (unlikely(!p)) {
4819                         print_overflow_msg(__func__, xdr);
4820                         return -EIO;
4821                 }
4822                 *res = be32_to_cpup(p);
4823                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4824         }
4825         return 0;
4826 }
4827
4828 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4829 {
4830         unsigned int savep;
4831         uint32_t attrlen, bitmap[3];
4832         int status;
4833
4834         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4835                 goto xdr_error;
4836         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4837                 goto xdr_error;
4838         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4839                 goto xdr_error;
4840
4841         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4842
4843         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4844                 goto xdr_error;
4845         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4846                 goto xdr_error;
4847         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4848                 goto xdr_error;
4849         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4850         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4851                 goto xdr_error;
4852         fsinfo->wtpref = fsinfo->wtmax;
4853
4854         status = -EIO;
4855         if (unlikely(bitmap[0]))
4856                 goto xdr_error;
4857
4858         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4859         if (status != 0)
4860                 goto xdr_error;
4861         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4862         if (status != 0)
4863                 goto xdr_error;
4864
4865         status = -EIO;
4866         if (unlikely(bitmap[1]))
4867                 goto xdr_error;
4868
4869         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4870         if (status)
4871                 goto xdr_error;
4872         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4873         if (status)
4874                 goto xdr_error;
4875
4876         status = verify_attr_len(xdr, savep, attrlen);
4877 xdr_error:
4878         dprintk("%s: xdr returned %d!\n", __func__, -status);
4879         return status;
4880 }
4881
4882 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4883 {
4884         __be32 *p;
4885         uint32_t len;
4886         int status;
4887
4888         /* Zero handle first to allow comparisons */
4889         memset(fh, 0, sizeof(*fh));
4890
4891         status = decode_op_hdr(xdr, OP_GETFH);
4892         if (status)
4893                 return status;
4894
4895         p = xdr_inline_decode(xdr, 4);
4896         if (unlikely(!p))
4897                 goto out_overflow;
4898         len = be32_to_cpup(p);
4899         if (len > NFS4_FHSIZE)
4900                 return -EIO;
4901         fh->size = len;
4902         p = xdr_inline_decode(xdr, len);
4903         if (unlikely(!p))
4904                 goto out_overflow;
4905         memcpy(fh->data, p, len);
4906         return 0;
4907 out_overflow:
4908         print_overflow_msg(__func__, xdr);
4909         return -EIO;
4910 }
4911
4912 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4913 {
4914         int status;
4915
4916         status = decode_op_hdr(xdr, OP_LINK);
4917         if (status)
4918                 return status;
4919         return decode_change_info(xdr, cinfo);
4920 }
4921
4922 /*
4923  * We create the owner, so we know a proper owner.id length is 4.
4924  */
4925 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4926 {
4927         uint64_t offset, length, clientid;
4928         __be32 *p;
4929         uint32_t namelen, type;
4930
4931         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4932         if (unlikely(!p))
4933                 goto out_overflow;
4934         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4935         p = xdr_decode_hyper(p, &length);
4936         type = be32_to_cpup(p++); /* 4 byte read */
4937         if (fl != NULL) { /* manipulate file lock */
4938                 fl->fl_start = (loff_t)offset;
4939                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4940                 if (length == ~(uint64_t)0)
4941                         fl->fl_end = OFFSET_MAX;
4942                 fl->fl_type = F_WRLCK;
4943                 if (type & 1)
4944                         fl->fl_type = F_RDLCK;
4945                 fl->fl_pid = 0;
4946         }
4947         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4948         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4949         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4950         if (likely(p))
4951                 return -NFS4ERR_DENIED;
4952 out_overflow:
4953         print_overflow_msg(__func__, xdr);
4954         return -EIO;
4955 }
4956
4957 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4958 {
4959         int status;
4960
4961         status = decode_op_hdr(xdr, OP_LOCK);
4962         if (status == -EIO)
4963                 goto out;
4964         if (status == 0) {
4965                 status = decode_lock_stateid(xdr, &res->stateid);
4966                 if (unlikely(status))
4967                         goto out;
4968         } else if (status == -NFS4ERR_DENIED)
4969                 status = decode_lock_denied(xdr, NULL);
4970         if (res->open_seqid != NULL)
4971                 nfs_increment_open_seqid(status, res->open_seqid);
4972         nfs_increment_lock_seqid(status, res->lock_seqid);
4973 out:
4974         return status;
4975 }
4976
4977 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4978 {
4979         int status;
4980         status = decode_op_hdr(xdr, OP_LOCKT);
4981         if (status == -NFS4ERR_DENIED)
4982                 return decode_lock_denied(xdr, res->denied);
4983         return status;
4984 }
4985
4986 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4987 {
4988         int status;
4989
4990         status = decode_op_hdr(xdr, OP_LOCKU);
4991         if (status != -EIO)
4992                 nfs_increment_lock_seqid(status, res->seqid);
4993         if (status == 0)
4994                 status = decode_lock_stateid(xdr, &res->stateid);
4995         return status;
4996 }
4997
4998 static int decode_release_lockowner(struct xdr_stream *xdr)
4999 {
5000         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5001 }
5002
5003 static int decode_lookup(struct xdr_stream *xdr)
5004 {
5005         return decode_op_hdr(xdr, OP_LOOKUP);
5006 }
5007
5008 /* This is too sick! */
5009 static int decode_space_limit(struct xdr_stream *xdr,
5010                 unsigned long *pagemod_limit)
5011 {
5012         __be32 *p;
5013         uint32_t limit_type, nblocks, blocksize;
5014         u64 maxsize = 0;
5015
5016         p = xdr_inline_decode(xdr, 12);
5017         if (unlikely(!p))
5018                 goto out_overflow;
5019         limit_type = be32_to_cpup(p++);
5020         switch (limit_type) {
5021         case NFS4_LIMIT_SIZE:
5022                 xdr_decode_hyper(p, &maxsize);
5023                 break;
5024         case NFS4_LIMIT_BLOCKS:
5025                 nblocks = be32_to_cpup(p++);
5026                 blocksize = be32_to_cpup(p);
5027                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5028         }
5029         maxsize >>= PAGE_SHIFT;
5030         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5031         return 0;
5032 out_overflow:
5033         print_overflow_msg(__func__, xdr);
5034         return -EIO;
5035 }
5036
5037 static int decode_rw_delegation(struct xdr_stream *xdr,
5038                 uint32_t delegation_type,
5039                 struct nfs_openres *res)
5040 {
5041         __be32 *p;
5042         int status;
5043
5044         status = decode_delegation_stateid(xdr, &res->delegation);
5045         if (unlikely(status))
5046                 return status;
5047         p = xdr_inline_decode(xdr, 4);
5048         if (unlikely(!p))
5049                 goto out_overflow;
5050         res->do_recall = be32_to_cpup(p);
5051
5052         switch (delegation_type) {
5053         case NFS4_OPEN_DELEGATE_READ:
5054                 res->delegation_type = FMODE_READ;
5055                 break;
5056         case NFS4_OPEN_DELEGATE_WRITE:
5057                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5058                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5059                                 return -EIO;
5060         }
5061         return decode_ace(xdr, NULL);
5062 out_overflow:
5063         print_overflow_msg(__func__, xdr);
5064         return -EIO;
5065 }
5066
5067 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5068 {
5069         __be32 *p;
5070         uint32_t why_no_delegation;
5071
5072         p = xdr_inline_decode(xdr, 4);
5073         if (unlikely(!p))
5074                 goto out_overflow;
5075         why_no_delegation = be32_to_cpup(p);
5076         switch (why_no_delegation) {
5077                 case WND4_CONTENTION:
5078                 case WND4_RESOURCE:
5079                         xdr_inline_decode(xdr, 4);
5080                         /* Ignore for now */
5081         }
5082         return 0;
5083 out_overflow:
5084         print_overflow_msg(__func__, xdr);
5085         return -EIO;
5086 }
5087
5088 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5089 {
5090         __be32 *p;
5091         uint32_t delegation_type;
5092
5093         p = xdr_inline_decode(xdr, 4);
5094         if (unlikely(!p))
5095                 goto out_overflow;
5096         delegation_type = be32_to_cpup(p);
5097         res->delegation_type = 0;
5098         switch (delegation_type) {
5099         case NFS4_OPEN_DELEGATE_NONE:
5100                 return 0;
5101         case NFS4_OPEN_DELEGATE_READ:
5102         case NFS4_OPEN_DELEGATE_WRITE:
5103                 return decode_rw_delegation(xdr, delegation_type, res);
5104         case NFS4_OPEN_DELEGATE_NONE_EXT:
5105                 return decode_no_delegation(xdr, res);
5106         }
5107         return -EIO;
5108 out_overflow:
5109         print_overflow_msg(__func__, xdr);
5110         return -EIO;
5111 }
5112
5113 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5114 {
5115         __be32 *p;
5116         uint32_t savewords, bmlen, i;
5117         int status;
5118
5119         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5120                 return status;
5121         nfs_increment_open_seqid(status, res->seqid);
5122         if (status)
5123                 return status;
5124         status = decode_open_stateid(xdr, &res->stateid);
5125         if (unlikely(status))
5126                 return status;
5127
5128         decode_change_info(xdr, &res->cinfo);
5129
5130         p = xdr_inline_decode(xdr, 8);
5131         if (unlikely(!p))
5132                 goto out_overflow;
5133         res->rflags = be32_to_cpup(p++);
5134         bmlen = be32_to_cpup(p);
5135         if (bmlen > 10)
5136                 goto xdr_error;
5137
5138         p = xdr_inline_decode(xdr, bmlen << 2);
5139         if (unlikely(!p))
5140                 goto out_overflow;
5141         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5142         for (i = 0; i < savewords; ++i)
5143                 res->attrset[i] = be32_to_cpup(p++);
5144         for (; i < NFS4_BITMAP_SIZE; i++)
5145                 res->attrset[i] = 0;
5146
5147         return decode_delegation(xdr, res);
5148 xdr_error:
5149         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5150         return -EIO;
5151 out_overflow:
5152         print_overflow_msg(__func__, xdr);
5153         return -EIO;
5154 }
5155
5156 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5157 {
5158         int status;
5159
5160         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5161         if (status != -EIO)
5162                 nfs_increment_open_seqid(status, res->seqid);
5163         if (!status)
5164                 status = decode_open_stateid(xdr, &res->stateid);
5165         return status;
5166 }
5167
5168 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5169 {
5170         int status;
5171
5172         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5173         if (status != -EIO)
5174                 nfs_increment_open_seqid(status, res->seqid);
5175         if (!status)
5176                 status = decode_open_stateid(xdr, &res->stateid);
5177         return status;
5178 }
5179
5180 static int decode_putfh(struct xdr_stream *xdr)
5181 {
5182         return decode_op_hdr(xdr, OP_PUTFH);
5183 }
5184
5185 static int decode_putrootfh(struct xdr_stream *xdr)
5186 {
5187         return decode_op_hdr(xdr, OP_PUTROOTFH);
5188 }
5189
5190 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5191                        struct nfs_pgio_res *res)
5192 {
5193         __be32 *p;
5194         uint32_t count, eof, recvd;
5195         int status;
5196
5197         status = decode_op_hdr(xdr, OP_READ);
5198         if (status)
5199                 return status;
5200         p = xdr_inline_decode(xdr, 8);
5201         if (unlikely(!p))
5202                 goto out_overflow;
5203         eof = be32_to_cpup(p++);
5204         count = be32_to_cpup(p);
5205         recvd = xdr_read_pages(xdr, count);
5206         if (count > recvd) {
5207                 dprintk("NFS: server cheating in read reply: "
5208                                 "count %u > recvd %u\n", count, recvd);
5209                 count = recvd;
5210                 eof = 0;
5211         }
5212         res->eof = eof;
5213         res->count = count;
5214         return 0;
5215 out_overflow:
5216         print_overflow_msg(__func__, xdr);
5217         return -EIO;
5218 }
5219
5220 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5221 {
5222         int             status;
5223         __be32          verf[2];
5224
5225         status = decode_op_hdr(xdr, OP_READDIR);
5226         if (!status)
5227                 status = decode_verifier(xdr, readdir->verifier.data);
5228         if (unlikely(status))
5229                 return status;
5230         memcpy(verf, readdir->verifier.data, sizeof(verf));
5231         dprintk("%s: verifier = %08x:%08x\n",
5232                         __func__, verf[0], verf[1]);
5233         return xdr_read_pages(xdr, xdr->buf->page_len);
5234 }
5235
5236 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5237 {
5238         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5239         u32 len, recvd;
5240         __be32 *p;
5241         int status;
5242
5243         status = decode_op_hdr(xdr, OP_READLINK);
5244         if (status)
5245                 return status;
5246
5247         /* Convert length of symlink */
5248         p = xdr_inline_decode(xdr, 4);
5249         if (unlikely(!p))
5250                 goto out_overflow;
5251         len = be32_to_cpup(p);
5252         if (len >= rcvbuf->page_len || len <= 0) {
5253                 dprintk("nfs: server returned giant symlink!\n");
5254                 return -ENAMETOOLONG;
5255         }
5256         recvd = xdr_read_pages(xdr, len);
5257         if (recvd < len) {
5258                 dprintk("NFS: server cheating in readlink reply: "
5259                                 "count %u > recvd %u\n", len, recvd);
5260                 return -EIO;
5261         }
5262         /*
5263          * The XDR encode routine has set things up so that
5264          * the link text will be copied directly into the
5265          * buffer.  We just have to do overflow-checking,
5266          * and and null-terminate the text (the VFS expects
5267          * null-termination).
5268          */
5269         xdr_terminate_string(rcvbuf, len);
5270         return 0;
5271 out_overflow:
5272         print_overflow_msg(__func__, xdr);
5273         return -EIO;
5274 }
5275
5276 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5277 {
5278         int status;
5279
5280         status = decode_op_hdr(xdr, OP_REMOVE);
5281         if (status)
5282                 goto out;
5283         status = decode_change_info(xdr, cinfo);
5284 out:
5285         return status;
5286 }
5287
5288 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5289               struct nfs4_change_info *new_cinfo)
5290 {
5291         int status;
5292
5293         status = decode_op_hdr(xdr, OP_RENAME);
5294         if (status)
5295                 goto out;
5296         if ((status = decode_change_info(xdr, old_cinfo)))
5297                 goto out;
5298         status = decode_change_info(xdr, new_cinfo);
5299 out:
5300         return status;
5301 }
5302
5303 static int decode_renew(struct xdr_stream *xdr)
5304 {
5305         return decode_op_hdr(xdr, OP_RENEW);
5306 }
5307
5308 static int
5309 decode_restorefh(struct xdr_stream *xdr)
5310 {
5311         return decode_op_hdr(xdr, OP_RESTOREFH);
5312 }
5313
5314 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5315                          struct nfs_getaclres *res)
5316 {
5317         unsigned int savep;
5318         uint32_t attrlen,
5319                  bitmap[3] = {0};
5320         int status;
5321         unsigned int pg_offset;
5322
5323         res->acl_len = 0;
5324         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5325                 goto out;
5326
5327         xdr_enter_page(xdr, xdr->buf->page_len);
5328
5329         /* Calculate the offset of the page data */
5330         pg_offset = xdr->buf->head[0].iov_len;
5331
5332         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5333                 goto out;
5334         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5335                 goto out;
5336
5337         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5338                 return -EIO;
5339         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5340
5341                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5342                  * are stored with the acl data to handle the problem of
5343                  * variable length bitmaps.*/
5344                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5345                 res->acl_len = attrlen;
5346
5347                 /* Check for receive buffer overflow */
5348                 if (res->acl_len > (xdr->nwords << 2) ||
5349                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5350                         res->acl_flags |= NFS4_ACL_TRUNC;
5351                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5352                                         attrlen, xdr->nwords << 2);
5353                 }
5354         } else
5355                 status = -EOPNOTSUPP;
5356
5357 out:
5358         return status;
5359 }
5360
5361 static int
5362 decode_savefh(struct xdr_stream *xdr)
5363 {
5364         return decode_op_hdr(xdr, OP_SAVEFH);
5365 }
5366
5367 static int decode_setattr(struct xdr_stream *xdr)
5368 {
5369         __be32 *p;
5370         uint32_t bmlen;
5371         int status;
5372
5373         status = decode_op_hdr(xdr, OP_SETATTR);
5374         if (status)
5375                 return status;
5376         p = xdr_inline_decode(xdr, 4);
5377         if (unlikely(!p))
5378                 goto out_overflow;
5379         bmlen = be32_to_cpup(p);
5380         p = xdr_inline_decode(xdr, bmlen << 2);
5381         if (likely(p))
5382                 return 0;
5383 out_overflow:
5384         print_overflow_msg(__func__, xdr);
5385         return -EIO;
5386 }
5387
5388 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5389 {
5390         __be32 *p;
5391         uint32_t opnum;
5392         int32_t nfserr;
5393
5394         p = xdr_inline_decode(xdr, 8);
5395         if (unlikely(!p))
5396                 goto out_overflow;
5397         opnum = be32_to_cpup(p++);
5398         if (opnum != OP_SETCLIENTID) {
5399                 dprintk("nfs: decode_setclientid: Server returned operation"
5400                         " %d\n", opnum);
5401                 return -EIO;
5402         }
5403         nfserr = be32_to_cpup(p);
5404         if (nfserr == NFS_OK) {
5405                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5406                 if (unlikely(!p))
5407                         goto out_overflow;
5408                 p = xdr_decode_hyper(p, &res->clientid);
5409                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5410         } else if (nfserr == NFSERR_CLID_INUSE) {
5411                 uint32_t len;
5412
5413                 /* skip netid string */
5414                 p = xdr_inline_decode(xdr, 4);
5415                 if (unlikely(!p))
5416                         goto out_overflow;
5417                 len = be32_to_cpup(p);
5418                 p = xdr_inline_decode(xdr, len);
5419                 if (unlikely(!p))
5420                         goto out_overflow;
5421
5422                 /* skip uaddr string */
5423                 p = xdr_inline_decode(xdr, 4);
5424                 if (unlikely(!p))
5425                         goto out_overflow;
5426                 len = be32_to_cpup(p);
5427                 p = xdr_inline_decode(xdr, len);
5428                 if (unlikely(!p))
5429                         goto out_overflow;
5430                 return -NFSERR_CLID_INUSE;
5431         } else
5432                 return nfs4_stat_to_errno(nfserr);
5433
5434         return 0;
5435 out_overflow:
5436         print_overflow_msg(__func__, xdr);
5437         return -EIO;
5438 }
5439
5440 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5441 {
5442         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5443 }
5444
5445 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5446 {
5447         __be32 *p;
5448         int status;
5449
5450         status = decode_op_hdr(xdr, OP_WRITE);
5451         if (status)
5452                 return status;
5453
5454         p = xdr_inline_decode(xdr, 8);
5455         if (unlikely(!p))
5456                 goto out_overflow;
5457         res->count = be32_to_cpup(p++);
5458         res->verf->committed = be32_to_cpup(p++);
5459         return decode_write_verifier(xdr, &res->verf->verifier);
5460 out_overflow:
5461         print_overflow_msg(__func__, xdr);
5462         return -EIO;
5463 }
5464
5465 static int decode_delegreturn(struct xdr_stream *xdr)
5466 {
5467         return decode_op_hdr(xdr, OP_DELEGRETURN);
5468 }
5469
5470 static int decode_secinfo_gss(struct xdr_stream *xdr,
5471                               struct nfs4_secinfo4 *flavor)
5472 {
5473         u32 oid_len;
5474         __be32 *p;
5475
5476         p = xdr_inline_decode(xdr, 4);
5477         if (unlikely(!p))
5478                 goto out_overflow;
5479         oid_len = be32_to_cpup(p);
5480         if (oid_len > GSS_OID_MAX_LEN)
5481                 goto out_err;
5482
5483         p = xdr_inline_decode(xdr, oid_len);
5484         if (unlikely(!p))
5485                 goto out_overflow;
5486         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5487         flavor->flavor_info.oid.len = oid_len;
5488
5489         p = xdr_inline_decode(xdr, 8);
5490         if (unlikely(!p))
5491                 goto out_overflow;
5492         flavor->flavor_info.qop = be32_to_cpup(p++);
5493         flavor->flavor_info.service = be32_to_cpup(p);
5494
5495         return 0;
5496
5497 out_overflow:
5498         print_overflow_msg(__func__, xdr);
5499         return -EIO;
5500 out_err:
5501         return -EINVAL;
5502 }
5503
5504 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5505 {
5506         struct nfs4_secinfo4 *sec_flavor;
5507         unsigned int i, num_flavors;
5508         int status;
5509         __be32 *p;
5510
5511         p = xdr_inline_decode(xdr, 4);
5512         if (unlikely(!p))
5513                 goto out_overflow;
5514
5515         res->flavors->num_flavors = 0;
5516         num_flavors = be32_to_cpup(p);
5517
5518         for (i = 0; i < num_flavors; i++) {
5519                 sec_flavor = &res->flavors->flavors[i];
5520                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5521                         break;
5522
5523                 p = xdr_inline_decode(xdr, 4);
5524                 if (unlikely(!p))
5525                         goto out_overflow;
5526                 sec_flavor->flavor = be32_to_cpup(p);
5527
5528                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5529                         status = decode_secinfo_gss(xdr, sec_flavor);
5530                         if (status)
5531                                 goto out;
5532                 }
5533                 res->flavors->num_flavors++;
5534         }
5535
5536         status = 0;
5537 out:
5538         return status;
5539 out_overflow:
5540         print_overflow_msg(__func__, xdr);
5541         return -EIO;
5542 }
5543
5544 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5545 {
5546         int status = decode_op_hdr(xdr, OP_SECINFO);
5547         if (status)
5548                 return status;
5549         return decode_secinfo_common(xdr, res);
5550 }
5551
5552 #if defined(CONFIG_NFS_V4_1)
5553 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5554 {
5555         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5556         if (status)
5557                 return status;
5558         return decode_secinfo_common(xdr, res);
5559 }
5560
5561 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5562 {
5563         __be32 *p;
5564         uint32_t bitmap_words;
5565         unsigned int i;
5566
5567         p = xdr_inline_decode(xdr, 4);
5568         if (!p)
5569                 return -EIO;
5570         bitmap_words = be32_to_cpup(p++);
5571         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5572                 return -EIO;
5573         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5574         for (i = 0; i < bitmap_words; i++)
5575                 op_map->u.words[i] = be32_to_cpup(p++);
5576
5577         return 0;
5578 }
5579
5580 static int decode_exchange_id(struct xdr_stream *xdr,
5581                               struct nfs41_exchange_id_res *res)
5582 {
5583         __be32 *p;
5584         uint32_t dummy;
5585         char *dummy_str;
5586         int status;
5587         uint32_t impl_id_count;
5588
5589         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5590         if (status)
5591                 return status;
5592
5593         p = xdr_inline_decode(xdr, 8);
5594         if (unlikely(!p))
5595                 goto out_overflow;
5596         xdr_decode_hyper(p, &res->clientid);
5597         p = xdr_inline_decode(xdr, 12);
5598         if (unlikely(!p))
5599                 goto out_overflow;
5600         res->seqid = be32_to_cpup(p++);
5601         res->flags = be32_to_cpup(p++);
5602
5603         res->state_protect.how = be32_to_cpup(p);
5604         switch (res->state_protect.how) {
5605         case SP4_NONE:
5606                 break;
5607         case SP4_MACH_CRED:
5608                 status = decode_op_map(xdr, &res->state_protect.enforce);
5609                 if (status)
5610                         return status;
5611                 status = decode_op_map(xdr, &res->state_protect.allow);
5612                 if (status)
5613                         return status;
5614                 break;
5615         default:
5616                 WARN_ON_ONCE(1);
5617                 return -EIO;
5618         }
5619
5620         /* server_owner4.so_minor_id */
5621         p = xdr_inline_decode(xdr, 8);
5622         if (unlikely(!p))
5623                 goto out_overflow;
5624         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5625
5626         /* server_owner4.so_major_id */
5627         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5628         if (unlikely(status))
5629                 return status;
5630         memcpy(res->server_owner->major_id, dummy_str, dummy);
5631         res->server_owner->major_id_sz = dummy;
5632
5633         /* server_scope4 */
5634         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5635         if (unlikely(status))
5636                 return status;
5637         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5638         res->server_scope->server_scope_sz = dummy;
5639
5640         /* Implementation Id */
5641         p = xdr_inline_decode(xdr, 4);
5642         if (unlikely(!p))
5643                 goto out_overflow;
5644         impl_id_count = be32_to_cpup(p++);
5645
5646         if (impl_id_count) {
5647                 /* nii_domain */
5648                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5649                 if (unlikely(status))
5650                         return status;
5651                 memcpy(res->impl_id->domain, dummy_str, dummy);
5652
5653                 /* nii_name */
5654                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5655                 if (unlikely(status))
5656                         return status;
5657                 memcpy(res->impl_id->name, dummy_str, dummy);
5658
5659                 /* nii_date */
5660                 p = xdr_inline_decode(xdr, 12);
5661                 if (unlikely(!p))
5662                         goto out_overflow;
5663                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5664                 res->impl_id->date.nseconds = be32_to_cpup(p);
5665
5666                 /* if there's more than one entry, ignore the rest */
5667         }
5668         return 0;
5669 out_overflow:
5670         print_overflow_msg(__func__, xdr);
5671         return -EIO;
5672 }
5673
5674 static int decode_chan_attrs(struct xdr_stream *xdr,
5675                              struct nfs4_channel_attrs *attrs)
5676 {
5677         __be32 *p;
5678         u32 nr_attrs, val;
5679
5680         p = xdr_inline_decode(xdr, 28);
5681         if (unlikely(!p))
5682                 goto out_overflow;
5683         val = be32_to_cpup(p++);        /* headerpadsz */
5684         if (val)
5685                 return -EINVAL;         /* no support for header padding yet */
5686         attrs->max_rqst_sz = be32_to_cpup(p++);
5687         attrs->max_resp_sz = be32_to_cpup(p++);
5688         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5689         attrs->max_ops = be32_to_cpup(p++);
5690         attrs->max_reqs = be32_to_cpup(p++);
5691         nr_attrs = be32_to_cpup(p);
5692         if (unlikely(nr_attrs > 1)) {
5693                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5694                         "count %u\n", __func__, nr_attrs);
5695                 return -EINVAL;
5696         }
5697         if (nr_attrs == 1) {
5698                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5699                 if (unlikely(!p))
5700                         goto out_overflow;
5701         }
5702         return 0;
5703 out_overflow:
5704         print_overflow_msg(__func__, xdr);
5705         return -EIO;
5706 }
5707
5708 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5709 {
5710         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5711 }
5712
5713 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5714                                 struct nfs41_bind_conn_to_session_res *res)
5715 {
5716         __be32 *p;
5717         int status;
5718
5719         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5720         if (!status)
5721                 status = decode_sessionid(xdr, &res->sessionid);
5722         if (unlikely(status))
5723                 return status;
5724
5725         /* dir flags, rdma mode bool */
5726         p = xdr_inline_decode(xdr, 8);
5727         if (unlikely(!p))
5728                 goto out_overflow;
5729
5730         res->dir = be32_to_cpup(p++);
5731         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5732                 return -EIO;
5733         if (be32_to_cpup(p) == 0)
5734                 res->use_conn_in_rdma_mode = false;
5735         else
5736                 res->use_conn_in_rdma_mode = true;
5737
5738         return 0;
5739 out_overflow:
5740         print_overflow_msg(__func__, xdr);
5741         return -EIO;
5742 }
5743
5744 static int decode_create_session(struct xdr_stream *xdr,
5745                                  struct nfs41_create_session_res *res)
5746 {
5747         __be32 *p;
5748         int status;
5749
5750         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5751         if (!status)
5752                 status = decode_sessionid(xdr, &res->sessionid);
5753         if (unlikely(status))
5754                 return status;
5755
5756         /* seqid, flags */
5757         p = xdr_inline_decode(xdr, 8);
5758         if (unlikely(!p))
5759                 goto out_overflow;
5760         res->seqid = be32_to_cpup(p++);
5761         res->flags = be32_to_cpup(p);
5762
5763         /* Channel attributes */
5764         status = decode_chan_attrs(xdr, &res->fc_attrs);
5765         if (!status)
5766                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5767         return status;
5768 out_overflow:
5769         print_overflow_msg(__func__, xdr);
5770         return -EIO;
5771 }
5772
5773 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5774 {
5775         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5776 }
5777
5778 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5779 {
5780         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5781 }
5782
5783 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5784 {
5785         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5786 }
5787 #endif /* CONFIG_NFS_V4_1 */
5788
5789 static int decode_sequence(struct xdr_stream *xdr,
5790                            struct nfs4_sequence_res *res,
5791                            struct rpc_rqst *rqstp)
5792 {
5793 #if defined(CONFIG_NFS_V4_1)
5794         struct nfs4_session *session;
5795         struct nfs4_sessionid id;
5796         u32 dummy;
5797         int status;
5798         __be32 *p;
5799
5800         if (res->sr_slot == NULL)
5801                 return 0;
5802         if (!res->sr_slot->table->session)
5803                 return 0;
5804
5805         status = decode_op_hdr(xdr, OP_SEQUENCE);
5806         if (!status)
5807                 status = decode_sessionid(xdr, &id);
5808         if (unlikely(status))
5809                 goto out_err;
5810
5811         /*
5812          * If the server returns different values for sessionID, slotID or
5813          * sequence number, the server is looney tunes.
5814          */
5815         status = -EREMOTEIO;
5816         session = res->sr_slot->table->session;
5817
5818         if (memcmp(id.data, session->sess_id.data,
5819                    NFS4_MAX_SESSIONID_LEN)) {
5820                 dprintk("%s Invalid session id\n", __func__);
5821                 goto out_err;
5822         }
5823
5824         p = xdr_inline_decode(xdr, 20);
5825         if (unlikely(!p))
5826                 goto out_overflow;
5827
5828         /* seqid */
5829         dummy = be32_to_cpup(p++);
5830         if (dummy != res->sr_slot->seq_nr) {
5831                 dprintk("%s Invalid sequence number\n", __func__);
5832                 goto out_err;
5833         }
5834         /* slot id */
5835         dummy = be32_to_cpup(p++);
5836         if (dummy != res->sr_slot->slot_nr) {
5837                 dprintk("%s Invalid slot id\n", __func__);
5838                 goto out_err;
5839         }
5840         /* highest slot id */
5841         res->sr_highest_slotid = be32_to_cpup(p++);
5842         /* target highest slot id */
5843         res->sr_target_highest_slotid = be32_to_cpup(p++);
5844         /* result flags */
5845         res->sr_status_flags = be32_to_cpup(p);
5846         status = 0;
5847 out_err:
5848         res->sr_status = status;
5849         return status;
5850 out_overflow:
5851         print_overflow_msg(__func__, xdr);
5852         status = -EIO;
5853         goto out_err;
5854 #else  /* CONFIG_NFS_V4_1 */
5855         return 0;
5856 #endif /* CONFIG_NFS_V4_1 */
5857 }
5858
5859 #if defined(CONFIG_NFS_V4_1)
5860 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5861 {
5862         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5863         return decode_stateid(xdr, stateid);
5864 }
5865
5866 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5867                                 struct nfs4_getdeviceinfo_res *res)
5868 {
5869         struct pnfs_device *pdev = res->pdev;
5870         __be32 *p;
5871         uint32_t len, type;
5872         int status;
5873
5874         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5875         if (status) {
5876                 if (status == -ETOOSMALL) {
5877                         p = xdr_inline_decode(xdr, 4);
5878                         if (unlikely(!p))
5879                                 goto out_overflow;
5880                         pdev->mincount = be32_to_cpup(p);
5881                         dprintk("%s: Min count too small. mincnt = %u\n",
5882                                 __func__, pdev->mincount);
5883                 }
5884                 return status;
5885         }
5886
5887         p = xdr_inline_decode(xdr, 8);
5888         if (unlikely(!p))
5889                 goto out_overflow;
5890         type = be32_to_cpup(p++);
5891         if (type != pdev->layout_type) {
5892                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5893                         __func__, pdev->layout_type, type);
5894                 return -EINVAL;
5895         }
5896         /*
5897          * Get the length of the opaque device_addr4. xdr_read_pages places
5898          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5899          * and places the remaining xdr data in xdr_buf->tail
5900          */
5901         pdev->mincount = be32_to_cpup(p);
5902         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5903                 goto out_overflow;
5904
5905         /* Parse notification bitmap, verifying that it is zero. */
5906         p = xdr_inline_decode(xdr, 4);
5907         if (unlikely(!p))
5908                 goto out_overflow;
5909         len = be32_to_cpup(p);
5910         if (len) {
5911                 uint32_t i;
5912
5913                 p = xdr_inline_decode(xdr, 4 * len);
5914                 if (unlikely(!p))
5915                         goto out_overflow;
5916
5917                 res->notification = be32_to_cpup(p++);
5918                 for (i = 1; i < len; i++) {
5919                         if (be32_to_cpup(p++)) {
5920                                 dprintk("%s: unsupported notification\n",
5921                                         __func__);
5922                                 return -EIO;
5923                         }
5924                 }
5925         }
5926         return 0;
5927 out_overflow:
5928         print_overflow_msg(__func__, xdr);
5929         return -EIO;
5930 }
5931
5932 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5933                             struct nfs4_layoutget_res *res)
5934 {
5935         __be32 *p;
5936         int status;
5937         u32 layout_count;
5938         u32 recvd;
5939
5940         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5941         if (status)
5942                 return status;
5943         p = xdr_inline_decode(xdr, 4);
5944         if (unlikely(!p))
5945                 goto out_overflow;
5946         res->return_on_close = be32_to_cpup(p);
5947         decode_layout_stateid(xdr, &res->stateid);
5948         p = xdr_inline_decode(xdr, 4);
5949         if (unlikely(!p))
5950                 goto out_overflow;
5951         layout_count = be32_to_cpup(p);
5952         if (!layout_count) {
5953                 dprintk("%s: server responded with empty layout array\n",
5954                         __func__);
5955                 return -EINVAL;
5956         }
5957
5958         p = xdr_inline_decode(xdr, 28);
5959         if (unlikely(!p))
5960                 goto out_overflow;
5961         p = xdr_decode_hyper(p, &res->range.offset);
5962         p = xdr_decode_hyper(p, &res->range.length);
5963         res->range.iomode = be32_to_cpup(p++);
5964         res->type = be32_to_cpup(p++);
5965         res->layoutp->len = be32_to_cpup(p);
5966
5967         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5968                 __func__,
5969                 (unsigned long)res->range.offset,
5970                 (unsigned long)res->range.length,
5971                 res->range.iomode,
5972                 res->type,
5973                 res->layoutp->len);
5974
5975         recvd = xdr_read_pages(xdr, res->layoutp->len);
5976         if (res->layoutp->len > recvd) {
5977                 dprintk("NFS: server cheating in layoutget reply: "
5978                                 "layout len %u > recvd %u\n",
5979                                 res->layoutp->len, recvd);
5980                 return -EINVAL;
5981         }
5982
5983         if (layout_count > 1) {
5984                 /* We only handle a length one array at the moment.  Any
5985                  * further entries are just ignored.  Note that this means
5986                  * the client may see a response that is less than the
5987                  * minimum it requested.
5988                  */
5989                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5990                         __func__, layout_count);
5991         }
5992
5993         return 0;
5994 out_overflow:
5995         print_overflow_msg(__func__, xdr);
5996         return -EIO;
5997 }
5998
5999 static int decode_layoutreturn(struct xdr_stream *xdr,
6000                                struct nfs4_layoutreturn_res *res)
6001 {
6002         __be32 *p;
6003         int status;
6004
6005         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6006         if (status)
6007                 return status;
6008         p = xdr_inline_decode(xdr, 4);
6009         if (unlikely(!p))
6010                 goto out_overflow;
6011         res->lrs_present = be32_to_cpup(p);
6012         if (res->lrs_present)
6013                 status = decode_layout_stateid(xdr, &res->stateid);
6014         return status;
6015 out_overflow:
6016         print_overflow_msg(__func__, xdr);
6017         return -EIO;
6018 }
6019
6020 static int decode_layoutcommit(struct xdr_stream *xdr,
6021                                struct rpc_rqst *req,
6022                                struct nfs4_layoutcommit_res *res)
6023 {
6024         __be32 *p;
6025         __u32 sizechanged;
6026         int status;
6027
6028         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6029         res->status = status;
6030         if (status)
6031                 return status;
6032
6033         p = xdr_inline_decode(xdr, 4);
6034         if (unlikely(!p))
6035                 goto out_overflow;
6036         sizechanged = be32_to_cpup(p);
6037
6038         if (sizechanged) {
6039                 /* throw away new size */
6040                 p = xdr_inline_decode(xdr, 8);
6041                 if (unlikely(!p))
6042                         goto out_overflow;
6043         }
6044         return 0;
6045 out_overflow:
6046         print_overflow_msg(__func__, xdr);
6047         return -EIO;
6048 }
6049
6050 static int decode_test_stateid(struct xdr_stream *xdr,
6051                                struct nfs41_test_stateid_res *res)
6052 {
6053         __be32 *p;
6054         int status;
6055         int num_res;
6056
6057         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6058         if (status)
6059                 return status;
6060
6061         p = xdr_inline_decode(xdr, 4);
6062         if (unlikely(!p))
6063                 goto out_overflow;
6064         num_res = be32_to_cpup(p++);
6065         if (num_res != 1)
6066                 goto out;
6067
6068         p = xdr_inline_decode(xdr, 4);
6069         if (unlikely(!p))
6070                 goto out_overflow;
6071         res->status = be32_to_cpup(p++);
6072
6073         return status;
6074 out_overflow:
6075         print_overflow_msg(__func__, xdr);
6076 out:
6077         return -EIO;
6078 }
6079
6080 static int decode_free_stateid(struct xdr_stream *xdr,
6081                                struct nfs41_free_stateid_res *res)
6082 {
6083         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6084         return res->status;
6085 }
6086 #else
6087 static inline
6088 int decode_layoutreturn(struct xdr_stream *xdr,
6089                                struct nfs4_layoutreturn_res *res)
6090 {
6091         return 0;
6092 }
6093 #endif /* CONFIG_NFS_V4_1 */
6094
6095 /*
6096  * END OF "GENERIC" DECODE ROUTINES.
6097  */
6098
6099 /*
6100  * Decode OPEN_DOWNGRADE response
6101  */
6102 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6103                                        struct xdr_stream *xdr,
6104                                        struct nfs_closeres *res)
6105 {
6106         struct compound_hdr hdr;
6107         int status;
6108
6109         status = decode_compound_hdr(xdr, &hdr);
6110         if (status)
6111                 goto out;
6112         status = decode_sequence(xdr, &res->seq_res, rqstp);
6113         if (status)
6114                 goto out;
6115         status = decode_putfh(xdr);
6116         if (status)
6117                 goto out;
6118         if (res->lr_res) {
6119                 status = decode_layoutreturn(xdr, res->lr_res);
6120                 res->lr_ret = status;
6121                 if (status)
6122                         goto out;
6123         }
6124         status = decode_open_downgrade(xdr, res);
6125 out:
6126         return status;
6127 }
6128
6129 /*
6130  * Decode ACCESS response
6131  */
6132 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6133                                struct nfs4_accessres *res)
6134 {
6135         struct compound_hdr hdr;
6136         int status;
6137
6138         status = decode_compound_hdr(xdr, &hdr);
6139         if (status)
6140                 goto out;
6141         status = decode_sequence(xdr, &res->seq_res, rqstp);
6142         if (status)
6143                 goto out;
6144         status = decode_putfh(xdr);
6145         if (status != 0)
6146                 goto out;
6147         status = decode_access(xdr, &res->supported, &res->access);
6148         if (status != 0)
6149                 goto out;
6150         decode_getfattr(xdr, res->fattr, res->server);
6151 out:
6152         return status;
6153 }
6154
6155 /*
6156  * Decode LOOKUP response
6157  */
6158 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6159                                struct nfs4_lookup_res *res)
6160 {
6161         struct compound_hdr hdr;
6162         int status;
6163
6164         status = decode_compound_hdr(xdr, &hdr);
6165         if (status)
6166                 goto out;
6167         status = decode_sequence(xdr, &res->seq_res, rqstp);
6168         if (status)
6169                 goto out;
6170         status = decode_putfh(xdr);
6171         if (status)
6172                 goto out;
6173         status = decode_lookup(xdr);
6174         if (status)
6175                 goto out;
6176         status = decode_getfh(xdr, res->fh);
6177         if (status)
6178                 goto out;
6179         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6180 out:
6181         return status;
6182 }
6183
6184 /*
6185  * Decode LOOKUP_ROOT response
6186  */
6187 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6188                                     struct xdr_stream *xdr,
6189                                     struct nfs4_lookup_res *res)
6190 {
6191         struct compound_hdr hdr;
6192         int status;
6193
6194         status = decode_compound_hdr(xdr, &hdr);
6195         if (status)
6196                 goto out;
6197         status = decode_sequence(xdr, &res->seq_res, rqstp);
6198         if (status)
6199                 goto out;
6200         status = decode_putrootfh(xdr);
6201         if (status)
6202                 goto out;
6203         status = decode_getfh(xdr, res->fh);
6204         if (status == 0)
6205                 status = decode_getfattr_label(xdr, res->fattr,
6206                                                 res->label, res->server);
6207 out:
6208         return status;
6209 }
6210
6211 /*
6212  * Decode REMOVE response
6213  */
6214 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6215                                struct nfs_removeres *res)
6216 {
6217         struct compound_hdr hdr;
6218         int status;
6219
6220         status = decode_compound_hdr(xdr, &hdr);
6221         if (status)
6222                 goto out;
6223         status = decode_sequence(xdr, &res->seq_res, rqstp);
6224         if (status)
6225                 goto out;
6226         status = decode_putfh(xdr);
6227         if (status)
6228                 goto out;
6229         status = decode_remove(xdr, &res->cinfo);
6230 out:
6231         return status;
6232 }
6233
6234 /*
6235  * Decode RENAME response
6236  */
6237 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6238                                struct nfs_renameres *res)
6239 {
6240         struct compound_hdr hdr;
6241         int status;
6242
6243         status = decode_compound_hdr(xdr, &hdr);
6244         if (status)
6245                 goto out;
6246         status = decode_sequence(xdr, &res->seq_res, rqstp);
6247         if (status)
6248                 goto out;
6249         status = decode_putfh(xdr);
6250         if (status)
6251                 goto out;
6252         status = decode_savefh(xdr);
6253         if (status)
6254                 goto out;
6255         status = decode_putfh(xdr);
6256         if (status)
6257                 goto out;
6258         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6259 out:
6260         return status;
6261 }
6262
6263 /*
6264  * Decode LINK response
6265  */
6266 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6267                              struct nfs4_link_res *res)
6268 {
6269         struct compound_hdr hdr;
6270         int status;
6271
6272         status = decode_compound_hdr(xdr, &hdr);
6273         if (status)
6274                 goto out;
6275         status = decode_sequence(xdr, &res->seq_res, rqstp);
6276         if (status)
6277                 goto out;
6278         status = decode_putfh(xdr);
6279         if (status)
6280                 goto out;
6281         status = decode_savefh(xdr);
6282         if (status)
6283                 goto out;
6284         status = decode_putfh(xdr);
6285         if (status)
6286                 goto out;
6287         status = decode_link(xdr, &res->cinfo);
6288         if (status)
6289                 goto out;
6290         /*
6291          * Note order: OP_LINK leaves the directory as the current
6292          *             filehandle.
6293          */
6294         status = decode_restorefh(xdr);
6295         if (status)
6296                 goto out;
6297         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6298 out:
6299         return status;
6300 }
6301
6302 /*
6303  * Decode CREATE response
6304  */
6305 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6306                                struct nfs4_create_res *res)
6307 {
6308         struct compound_hdr hdr;
6309         int status;
6310
6311         status = decode_compound_hdr(xdr, &hdr);
6312         if (status)
6313                 goto out;
6314         status = decode_sequence(xdr, &res->seq_res, rqstp);
6315         if (status)
6316                 goto out;
6317         status = decode_putfh(xdr);
6318         if (status)
6319                 goto out;
6320         status = decode_create(xdr, &res->dir_cinfo);
6321         if (status)
6322                 goto out;
6323         status = decode_getfh(xdr, res->fh);
6324         if (status)
6325                 goto out;
6326         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6327 out:
6328         return status;
6329 }
6330
6331 /*
6332  * Decode SYMLINK response
6333  */
6334 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6335                                 struct nfs4_create_res *res)
6336 {
6337         return nfs4_xdr_dec_create(rqstp, xdr, res);
6338 }
6339
6340 /*
6341  * Decode GETATTR response
6342  */
6343 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6344                                 struct nfs4_getattr_res *res)
6345 {
6346         struct compound_hdr hdr;
6347         int status;
6348
6349         status = decode_compound_hdr(xdr, &hdr);
6350         if (status)
6351                 goto out;
6352         status = decode_sequence(xdr, &res->seq_res, rqstp);
6353         if (status)
6354                 goto out;
6355         status = decode_putfh(xdr);
6356         if (status)
6357                 goto out;
6358         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6359 out:
6360         return status;
6361 }
6362
6363 /*
6364  * Encode an SETACL request
6365  */
6366 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6367                                 struct nfs_setaclargs *args)
6368 {
6369         struct compound_hdr hdr = {
6370                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6371         };
6372
6373         encode_compound_hdr(xdr, req, &hdr);
6374         encode_sequence(xdr, &args->seq_args, &hdr);
6375         encode_putfh(xdr, args->fh, &hdr);
6376         encode_setacl(xdr, args, &hdr);
6377         encode_nops(&hdr);
6378 }
6379
6380 /*
6381  * Decode SETACL response
6382  */
6383 static int
6384 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385                     struct nfs_setaclres *res)
6386 {
6387         struct compound_hdr hdr;
6388         int status;
6389
6390         status = decode_compound_hdr(xdr, &hdr);
6391         if (status)
6392                 goto out;
6393         status = decode_sequence(xdr, &res->seq_res, rqstp);
6394         if (status)
6395                 goto out;
6396         status = decode_putfh(xdr);
6397         if (status)
6398                 goto out;
6399         status = decode_setattr(xdr);
6400 out:
6401         return status;
6402 }
6403
6404 /*
6405  * Decode GETACL response
6406  */
6407 static int
6408 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6409                     struct nfs_getaclres *res)
6410 {
6411         struct compound_hdr hdr;
6412         int status;
6413
6414         if (res->acl_scratch != NULL) {
6415                 void *p = page_address(res->acl_scratch);
6416                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6417         }
6418         status = decode_compound_hdr(xdr, &hdr);
6419         if (status)
6420                 goto out;
6421         status = decode_sequence(xdr, &res->seq_res, rqstp);
6422         if (status)
6423                 goto out;
6424         status = decode_putfh(xdr);
6425         if (status)
6426                 goto out;
6427         status = decode_getacl(xdr, rqstp, res);
6428
6429 out:
6430         return status;
6431 }
6432
6433 /*
6434  * Decode CLOSE response
6435  */
6436 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6437                               struct nfs_closeres *res)
6438 {
6439         struct compound_hdr hdr;
6440         int status;
6441
6442         status = decode_compound_hdr(xdr, &hdr);
6443         if (status)
6444                 goto out;
6445         status = decode_sequence(xdr, &res->seq_res, rqstp);
6446         if (status)
6447                 goto out;
6448         status = decode_putfh(xdr);
6449         if (status)
6450                 goto out;
6451         if (res->lr_res) {
6452                 status = decode_layoutreturn(xdr, res->lr_res);
6453                 res->lr_ret = status;
6454                 if (status)
6455                         goto out;
6456         }
6457         if (res->fattr != NULL) {
6458                 status = decode_getfattr(xdr, res->fattr, res->server);
6459                 if (status != 0)
6460                         goto out;
6461         }
6462         status = decode_close(xdr, res);
6463 out:
6464         return status;
6465 }
6466
6467 /*
6468  * Decode OPEN response
6469  */
6470 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6471                              struct nfs_openres *res)
6472 {
6473         struct compound_hdr hdr;
6474         int status;
6475
6476         status = decode_compound_hdr(xdr, &hdr);
6477         if (status)
6478                 goto out;
6479         status = decode_sequence(xdr, &res->seq_res, rqstp);
6480         if (status)
6481                 goto out;
6482         status = decode_putfh(xdr);
6483         if (status)
6484                 goto out;
6485         status = decode_open(xdr, res);
6486         if (status)
6487                 goto out;
6488         status = decode_getfh(xdr, &res->fh);
6489         if (status)
6490                 goto out;
6491         if (res->access_request)
6492                 decode_access(xdr, &res->access_supported, &res->access_result);
6493         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
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                                      struct nfs_open_confirmres *res)
6504 {
6505         struct compound_hdr hdr;
6506         int status;
6507
6508         status = decode_compound_hdr(xdr, &hdr);
6509         if (status)
6510                 goto out;
6511         status = decode_putfh(xdr);
6512         if (status)
6513                 goto out;
6514         status = decode_open_confirm(xdr, res);
6515 out:
6516         return status;
6517 }
6518
6519 /*
6520  * Decode OPEN response
6521  */
6522 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6523                                     struct xdr_stream *xdr,
6524                                     struct nfs_openres *res)
6525 {
6526         struct compound_hdr hdr;
6527         int status;
6528
6529         status = decode_compound_hdr(xdr, &hdr);
6530         if (status)
6531                 goto out;
6532         status = decode_sequence(xdr, &res->seq_res, rqstp);
6533         if (status)
6534                 goto out;
6535         status = decode_putfh(xdr);
6536         if (status)
6537                 goto out;
6538         status = decode_open(xdr, res);
6539         if (status)
6540                 goto out;
6541         if (res->access_request)
6542                 decode_access(xdr, &res->access_supported, &res->access_result);
6543         decode_getfattr(xdr, res->f_attr, res->server);
6544 out:
6545         return status;
6546 }
6547
6548 /*
6549  * Decode SETATTR response
6550  */
6551 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6552                                 struct xdr_stream *xdr,
6553                                 struct nfs_setattrres *res)
6554 {
6555         struct compound_hdr hdr;
6556         int status;
6557
6558         status = decode_compound_hdr(xdr, &hdr);
6559         if (status)
6560                 goto out;
6561         status = decode_sequence(xdr, &res->seq_res, rqstp);
6562         if (status)
6563                 goto out;
6564         status = decode_putfh(xdr);
6565         if (status)
6566                 goto out;
6567         status = decode_setattr(xdr);
6568         if (status)
6569                 goto out;
6570         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6571 out:
6572         return status;
6573 }
6574
6575 /*
6576  * Decode LOCK response
6577  */
6578 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579                              struct nfs_lock_res *res)
6580 {
6581         struct compound_hdr hdr;
6582         int status;
6583
6584         status = decode_compound_hdr(xdr, &hdr);
6585         if (status)
6586                 goto out;
6587         status = decode_sequence(xdr, &res->seq_res, rqstp);
6588         if (status)
6589                 goto out;
6590         status = decode_putfh(xdr);
6591         if (status)
6592                 goto out;
6593         status = decode_lock(xdr, res);
6594 out:
6595         return status;
6596 }
6597
6598 /*
6599  * Decode LOCKT response
6600  */
6601 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602                               struct nfs_lockt_res *res)
6603 {
6604         struct compound_hdr hdr;
6605         int status;
6606
6607         status = decode_compound_hdr(xdr, &hdr);
6608         if (status)
6609                 goto out;
6610         status = decode_sequence(xdr, &res->seq_res, rqstp);
6611         if (status)
6612                 goto out;
6613         status = decode_putfh(xdr);
6614         if (status)
6615                 goto out;
6616         status = decode_lockt(xdr, res);
6617 out:
6618         return status;
6619 }
6620
6621 /*
6622  * Decode LOCKU response
6623  */
6624 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6625                               struct nfs_locku_res *res)
6626 {
6627         struct compound_hdr hdr;
6628         int status;
6629
6630         status = decode_compound_hdr(xdr, &hdr);
6631         if (status)
6632                 goto out;
6633         status = decode_sequence(xdr, &res->seq_res, rqstp);
6634         if (status)
6635                 goto out;
6636         status = decode_putfh(xdr);
6637         if (status)
6638                 goto out;
6639         status = decode_locku(xdr, res);
6640 out:
6641         return status;
6642 }
6643
6644 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6645                                           struct xdr_stream *xdr, void *dummy)
6646 {
6647         struct compound_hdr hdr;
6648         int status;
6649
6650         status = decode_compound_hdr(xdr, &hdr);
6651         if (!status)
6652                 status = decode_release_lockowner(xdr);
6653         return status;
6654 }
6655
6656 /*
6657  * Decode READLINK response
6658  */
6659 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6660                                  struct xdr_stream *xdr,
6661                                  struct nfs4_readlink_res *res)
6662 {
6663         struct compound_hdr hdr;
6664         int status;
6665
6666         status = decode_compound_hdr(xdr, &hdr);
6667         if (status)
6668                 goto out;
6669         status = decode_sequence(xdr, &res->seq_res, rqstp);
6670         if (status)
6671                 goto out;
6672         status = decode_putfh(xdr);
6673         if (status)
6674                 goto out;
6675         status = decode_readlink(xdr, rqstp);
6676 out:
6677         return status;
6678 }
6679
6680 /*
6681  * Decode READDIR response
6682  */
6683 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6684                                 struct nfs4_readdir_res *res)
6685 {
6686         struct compound_hdr hdr;
6687         int status;
6688
6689         status = decode_compound_hdr(xdr, &hdr);
6690         if (status)
6691                 goto out;
6692         status = decode_sequence(xdr, &res->seq_res, rqstp);
6693         if (status)
6694                 goto out;
6695         status = decode_putfh(xdr);
6696         if (status)
6697                 goto out;
6698         status = decode_readdir(xdr, rqstp, res);
6699 out:
6700         return status;
6701 }
6702
6703 /*
6704  * Decode Read response
6705  */
6706 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6707                              struct nfs_pgio_res *res)
6708 {
6709         struct compound_hdr hdr;
6710         int status;
6711
6712         status = decode_compound_hdr(xdr, &hdr);
6713         res->op_status = hdr.status;
6714         if (status)
6715                 goto out;
6716         status = decode_sequence(xdr, &res->seq_res, rqstp);
6717         if (status)
6718                 goto out;
6719         status = decode_putfh(xdr);
6720         if (status)
6721                 goto out;
6722         status = decode_read(xdr, rqstp, res);
6723         if (!status)
6724                 status = res->count;
6725 out:
6726         return status;
6727 }
6728
6729 /*
6730  * Decode WRITE response
6731  */
6732 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6733                               struct nfs_pgio_res *res)
6734 {
6735         struct compound_hdr hdr;
6736         int status;
6737
6738         status = decode_compound_hdr(xdr, &hdr);
6739         res->op_status = hdr.status;
6740         if (status)
6741                 goto out;
6742         status = decode_sequence(xdr, &res->seq_res, rqstp);
6743         if (status)
6744                 goto out;
6745         status = decode_putfh(xdr);
6746         if (status)
6747                 goto out;
6748         status = decode_write(xdr, res);
6749         if (status)
6750                 goto out;
6751         if (res->fattr)
6752                 decode_getfattr(xdr, res->fattr, res->server);
6753         if (!status)
6754                 status = res->count;
6755 out:
6756         return status;
6757 }
6758
6759 /*
6760  * Decode COMMIT response
6761  */
6762 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6763                                struct nfs_commitres *res)
6764 {
6765         struct compound_hdr hdr;
6766         int status;
6767
6768         status = decode_compound_hdr(xdr, &hdr);
6769         res->op_status = hdr.status;
6770         if (status)
6771                 goto out;
6772         status = decode_sequence(xdr, &res->seq_res, rqstp);
6773         if (status)
6774                 goto out;
6775         status = decode_putfh(xdr);
6776         if (status)
6777                 goto out;
6778         status = decode_commit(xdr, res);
6779 out:
6780         return status;
6781 }
6782
6783 /*
6784  * Decode FSINFO response
6785  */
6786 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6787                                struct nfs4_fsinfo_res *res)
6788 {
6789         struct compound_hdr hdr;
6790         int status;
6791
6792         status = decode_compound_hdr(xdr, &hdr);
6793         if (!status)
6794                 status = decode_sequence(xdr, &res->seq_res, req);
6795         if (!status)
6796                 status = decode_putfh(xdr);
6797         if (!status)
6798                 status = decode_fsinfo(xdr, res->fsinfo);
6799         return status;
6800 }
6801
6802 /*
6803  * Decode PATHCONF response
6804  */
6805 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6806                                  struct nfs4_pathconf_res *res)
6807 {
6808         struct compound_hdr hdr;
6809         int status;
6810
6811         status = decode_compound_hdr(xdr, &hdr);
6812         if (!status)
6813                 status = decode_sequence(xdr, &res->seq_res, req);
6814         if (!status)
6815                 status = decode_putfh(xdr);
6816         if (!status)
6817                 status = decode_pathconf(xdr, res->pathconf);
6818         return status;
6819 }
6820
6821 /*
6822  * Decode STATFS response
6823  */
6824 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6825                                struct nfs4_statfs_res *res)
6826 {
6827         struct compound_hdr hdr;
6828         int status;
6829
6830         status = decode_compound_hdr(xdr, &hdr);
6831         if (!status)
6832                 status = decode_sequence(xdr, &res->seq_res, req);
6833         if (!status)
6834                 status = decode_putfh(xdr);
6835         if (!status)
6836                 status = decode_statfs(xdr, res->fsstat);
6837         return status;
6838 }
6839
6840 /*
6841  * Decode GETATTR_BITMAP response
6842  */
6843 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6844                                     struct xdr_stream *xdr,
6845                                     struct nfs4_server_caps_res *res)
6846 {
6847         struct compound_hdr hdr;
6848         int status;
6849
6850         status = decode_compound_hdr(xdr, &hdr);
6851         if (status)
6852                 goto out;
6853         status = decode_sequence(xdr, &res->seq_res, req);
6854         if (status)
6855                 goto out;
6856         status = decode_putfh(xdr);
6857         if (status)
6858                 goto out;
6859         status = decode_server_caps(xdr, res);
6860 out:
6861         return status;
6862 }
6863
6864 /*
6865  * Decode RENEW response
6866  */
6867 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6868                               void *__unused)
6869 {
6870         struct compound_hdr hdr;
6871         int status;
6872
6873         status = decode_compound_hdr(xdr, &hdr);
6874         if (!status)
6875                 status = decode_renew(xdr);
6876         return status;
6877 }
6878
6879 /*
6880  * Decode SETCLIENTID response
6881  */
6882 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6883                                     struct xdr_stream *xdr,
6884                                     struct nfs4_setclientid_res *res)
6885 {
6886         struct compound_hdr hdr;
6887         int status;
6888
6889         status = decode_compound_hdr(xdr, &hdr);
6890         if (!status)
6891                 status = decode_setclientid(xdr, res);
6892         return status;
6893 }
6894
6895 /*
6896  * Decode SETCLIENTID_CONFIRM response
6897  */
6898 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6899                                             struct xdr_stream *xdr)
6900 {
6901         struct compound_hdr hdr;
6902         int status;
6903
6904         status = decode_compound_hdr(xdr, &hdr);
6905         if (!status)
6906                 status = decode_setclientid_confirm(xdr);
6907         return status;
6908 }
6909
6910 /*
6911  * Decode DELEGRETURN response
6912  */
6913 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6914                                     struct xdr_stream *xdr,
6915                                     struct nfs4_delegreturnres *res)
6916 {
6917         struct compound_hdr hdr;
6918         int status;
6919
6920         status = decode_compound_hdr(xdr, &hdr);
6921         if (status)
6922                 goto out;
6923         status = decode_sequence(xdr, &res->seq_res, rqstp);
6924         if (status)
6925                 goto out;
6926         status = decode_putfh(xdr);
6927         if (status != 0)
6928                 goto out;
6929         if (res->lr_res) {
6930                 status = decode_layoutreturn(xdr, res->lr_res);
6931                 res->lr_ret = status;
6932                 if (status)
6933                         goto out;
6934         }
6935         if (res->fattr) {
6936                 status = decode_getfattr(xdr, res->fattr, res->server);
6937                 if (status != 0)
6938                         goto out;
6939         }
6940         status = decode_delegreturn(xdr);
6941 out:
6942         return status;
6943 }
6944
6945 /*
6946  * Decode FS_LOCATIONS response
6947  */
6948 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6949                                      struct xdr_stream *xdr,
6950                                      struct nfs4_fs_locations_res *res)
6951 {
6952         struct compound_hdr hdr;
6953         int status;
6954
6955         status = decode_compound_hdr(xdr, &hdr);
6956         if (status)
6957                 goto out;
6958         status = decode_sequence(xdr, &res->seq_res, req);
6959         if (status)
6960                 goto out;
6961         status = decode_putfh(xdr);
6962         if (status)
6963                 goto out;
6964         if (res->migration) {
6965                 xdr_enter_page(xdr, PAGE_SIZE);
6966                 status = decode_getfattr_generic(xdr,
6967                                         &res->fs_locations->fattr,
6968                                          NULL, res->fs_locations,
6969                                          NULL, res->fs_locations->server);
6970                 if (status)
6971                         goto out;
6972                 if (res->renew)
6973                         status = decode_renew(xdr);
6974         } else {
6975                 status = decode_lookup(xdr);
6976                 if (status)
6977                         goto out;
6978                 xdr_enter_page(xdr, PAGE_SIZE);
6979                 status = decode_getfattr_generic(xdr,
6980                                         &res->fs_locations->fattr,
6981                                          NULL, res->fs_locations,
6982                                          NULL, res->fs_locations->server);
6983         }
6984 out:
6985         return status;
6986 }
6987
6988 /*
6989  * Decode SECINFO response
6990  */
6991 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6992                                 struct xdr_stream *xdr,
6993                                 struct nfs4_secinfo_res *res)
6994 {
6995         struct compound_hdr hdr;
6996         int status;
6997
6998         status = decode_compound_hdr(xdr, &hdr);
6999         if (status)
7000                 goto out;
7001         status = decode_sequence(xdr, &res->seq_res, rqstp);
7002         if (status)
7003                 goto out;
7004         status = decode_putfh(xdr);
7005         if (status)
7006                 goto out;
7007         status = decode_secinfo(xdr, res);
7008 out:
7009         return status;
7010 }
7011
7012 /*
7013  * Decode FSID_PRESENT response
7014  */
7015 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7016                                      struct xdr_stream *xdr,
7017                                      struct nfs4_fsid_present_res *res)
7018 {
7019         struct compound_hdr hdr;
7020         int status;
7021
7022         status = decode_compound_hdr(xdr, &hdr);
7023         if (status)
7024                 goto out;
7025         status = decode_sequence(xdr, &res->seq_res, rqstp);
7026         if (status)
7027                 goto out;
7028         status = decode_putfh(xdr);
7029         if (status)
7030                 goto out;
7031         status = decode_getfh(xdr, res->fh);
7032         if (status)
7033                 goto out;
7034         if (res->renew)
7035                 status = decode_renew(xdr);
7036 out:
7037         return status;
7038 }
7039
7040 #if defined(CONFIG_NFS_V4_1)
7041 /*
7042  * Decode BIND_CONN_TO_SESSION response
7043  */
7044 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7045                                         struct xdr_stream *xdr,
7046                                         void *res)
7047 {
7048         struct compound_hdr hdr;
7049         int status;
7050
7051         status = decode_compound_hdr(xdr, &hdr);
7052         if (!status)
7053                 status = decode_bind_conn_to_session(xdr, res);
7054         return status;
7055 }
7056
7057 /*
7058  * Decode EXCHANGE_ID response
7059  */
7060 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7061                                     struct xdr_stream *xdr,
7062                                     void *res)
7063 {
7064         struct compound_hdr hdr;
7065         int status;
7066
7067         status = decode_compound_hdr(xdr, &hdr);
7068         if (!status)
7069                 status = decode_exchange_id(xdr, res);
7070         return status;
7071 }
7072
7073 /*
7074  * Decode CREATE_SESSION response
7075  */
7076 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7077                                        struct xdr_stream *xdr,
7078                                        struct nfs41_create_session_res *res)
7079 {
7080         struct compound_hdr hdr;
7081         int status;
7082
7083         status = decode_compound_hdr(xdr, &hdr);
7084         if (!status)
7085                 status = decode_create_session(xdr, res);
7086         return status;
7087 }
7088
7089 /*
7090  * Decode DESTROY_SESSION response
7091  */
7092 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7093                                         struct xdr_stream *xdr,
7094                                         void *res)
7095 {
7096         struct compound_hdr hdr;
7097         int status;
7098
7099         status = decode_compound_hdr(xdr, &hdr);
7100         if (!status)
7101                 status = decode_destroy_session(xdr, res);
7102         return status;
7103 }
7104
7105 /*
7106  * Decode DESTROY_CLIENTID response
7107  */
7108 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7109                                         struct xdr_stream *xdr,
7110                                         void *res)
7111 {
7112         struct compound_hdr hdr;
7113         int status;
7114
7115         status = decode_compound_hdr(xdr, &hdr);
7116         if (!status)
7117                 status = decode_destroy_clientid(xdr, res);
7118         return status;
7119 }
7120
7121 /*
7122  * Decode SEQUENCE response
7123  */
7124 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7125                                  struct xdr_stream *xdr,
7126                                  struct nfs4_sequence_res *res)
7127 {
7128         struct compound_hdr hdr;
7129         int status;
7130
7131         status = decode_compound_hdr(xdr, &hdr);
7132         if (!status)
7133                 status = decode_sequence(xdr, res, rqstp);
7134         return status;
7135 }
7136
7137 /*
7138  * Decode GET_LEASE_TIME response
7139  */
7140 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7141                                        struct xdr_stream *xdr,
7142                                        struct nfs4_get_lease_time_res *res)
7143 {
7144         struct compound_hdr hdr;
7145         int status;
7146
7147         status = decode_compound_hdr(xdr, &hdr);
7148         if (!status)
7149                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7150         if (!status)
7151                 status = decode_putrootfh(xdr);
7152         if (!status)
7153                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7154         return status;
7155 }
7156
7157 /*
7158  * Decode RECLAIM_COMPLETE response
7159  */
7160 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7161                                          struct xdr_stream *xdr,
7162                                          struct nfs41_reclaim_complete_res *res)
7163 {
7164         struct compound_hdr hdr;
7165         int status;
7166
7167         status = decode_compound_hdr(xdr, &hdr);
7168         if (!status)
7169                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7170         if (!status)
7171                 status = decode_reclaim_complete(xdr, NULL);
7172         return status;
7173 }
7174
7175 /*
7176  * Decode GETDEVINFO response
7177  */
7178 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179                                       struct xdr_stream *xdr,
7180                                       struct nfs4_getdeviceinfo_res *res)
7181 {
7182         struct compound_hdr hdr;
7183         int status;
7184
7185         status = decode_compound_hdr(xdr, &hdr);
7186         if (status != 0)
7187                 goto out;
7188         status = decode_sequence(xdr, &res->seq_res, rqstp);
7189         if (status != 0)
7190                 goto out;
7191         status = decode_getdeviceinfo(xdr, res);
7192 out:
7193         return status;
7194 }
7195
7196 /*
7197  * Decode LAYOUTGET response
7198  */
7199 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7200                                   struct xdr_stream *xdr,
7201                                   struct nfs4_layoutget_res *res)
7202 {
7203         struct compound_hdr hdr;
7204         int status;
7205
7206         status = decode_compound_hdr(xdr, &hdr);
7207         if (status)
7208                 goto out;
7209         status = decode_sequence(xdr, &res->seq_res, rqstp);
7210         if (status)
7211                 goto out;
7212         status = decode_putfh(xdr);
7213         if (status)
7214                 goto out;
7215         status = decode_layoutget(xdr, rqstp, res);
7216 out:
7217         return status;
7218 }
7219
7220 /*
7221  * Decode LAYOUTRETURN response
7222  */
7223 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7224                                      struct xdr_stream *xdr,
7225                                      struct nfs4_layoutreturn_res *res)
7226 {
7227         struct compound_hdr hdr;
7228         int status;
7229
7230         status = decode_compound_hdr(xdr, &hdr);
7231         if (status)
7232                 goto out;
7233         status = decode_sequence(xdr, &res->seq_res, rqstp);
7234         if (status)
7235                 goto out;
7236         status = decode_putfh(xdr);
7237         if (status)
7238                 goto out;
7239         status = decode_layoutreturn(xdr, res);
7240 out:
7241         return status;
7242 }
7243
7244 /*
7245  * Decode LAYOUTCOMMIT response
7246  */
7247 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7248                                      struct xdr_stream *xdr,
7249                                      struct nfs4_layoutcommit_res *res)
7250 {
7251         struct compound_hdr hdr;
7252         int status;
7253
7254         status = decode_compound_hdr(xdr, &hdr);
7255         if (status)
7256                 goto out;
7257         status = decode_sequence(xdr, &res->seq_res, rqstp);
7258         if (status)
7259                 goto out;
7260         status = decode_putfh(xdr);
7261         if (status)
7262                 goto out;
7263         status = decode_layoutcommit(xdr, rqstp, res);
7264         if (status)
7265                 goto out;
7266         decode_getfattr(xdr, res->fattr, res->server);
7267 out:
7268         return status;
7269 }
7270
7271 /*
7272  * Decode SECINFO_NO_NAME response
7273  */
7274 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7275                                         struct xdr_stream *xdr,
7276                                         struct nfs4_secinfo_res *res)
7277 {
7278         struct compound_hdr hdr;
7279         int status;
7280
7281         status = decode_compound_hdr(xdr, &hdr);
7282         if (status)
7283                 goto out;
7284         status = decode_sequence(xdr, &res->seq_res, rqstp);
7285         if (status)
7286                 goto out;
7287         status = decode_putrootfh(xdr);
7288         if (status)
7289                 goto out;
7290         status = decode_secinfo_no_name(xdr, res);
7291 out:
7292         return status;
7293 }
7294
7295 /*
7296  * Decode TEST_STATEID response
7297  */
7298 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7299                                      struct xdr_stream *xdr,
7300                                      struct nfs41_test_stateid_res *res)
7301 {
7302         struct compound_hdr hdr;
7303         int status;
7304
7305         status = decode_compound_hdr(xdr, &hdr);
7306         if (status)
7307                 goto out;
7308         status = decode_sequence(xdr, &res->seq_res, rqstp);
7309         if (status)
7310                 goto out;
7311         status = decode_test_stateid(xdr, res);
7312 out:
7313         return status;
7314 }
7315
7316 /*
7317  * Decode FREE_STATEID response
7318  */
7319 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7320                                      struct xdr_stream *xdr,
7321                                      struct nfs41_free_stateid_res *res)
7322 {
7323         struct compound_hdr hdr;
7324         int status;
7325
7326         status = decode_compound_hdr(xdr, &hdr);
7327         if (status)
7328                 goto out;
7329         status = decode_sequence(xdr, &res->seq_res, rqstp);
7330         if (status)
7331                 goto out;
7332         status = decode_free_stateid(xdr, res);
7333 out:
7334         return status;
7335 }
7336 #endif /* CONFIG_NFS_V4_1 */
7337
7338 /**
7339  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7340  *                      the local page cache.
7341  * @xdr: XDR stream where entry resides
7342  * @entry: buffer to fill in with entry data
7343  * @plus: boolean indicating whether this should be a readdirplus entry
7344  *
7345  * Returns zero if successful, otherwise a negative errno value is
7346  * returned.
7347  *
7348  * This function is not invoked during READDIR reply decoding, but
7349  * rather whenever an application invokes the getdents(2) system call
7350  * on a directory already in our cache.
7351  */
7352 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7353                        int plus)
7354 {
7355         unsigned int savep;
7356         uint32_t bitmap[3] = {0};
7357         uint32_t len;
7358         __be32 *p = xdr_inline_decode(xdr, 4);
7359         if (unlikely(!p))
7360                 goto out_overflow;
7361         if (*p == xdr_zero) {
7362                 p = xdr_inline_decode(xdr, 4);
7363                 if (unlikely(!p))
7364                         goto out_overflow;
7365                 if (*p == xdr_zero)
7366                         return -EAGAIN;
7367                 entry->eof = 1;
7368                 return -EBADCOOKIE;
7369         }
7370
7371         p = xdr_inline_decode(xdr, 12);
7372         if (unlikely(!p))
7373                 goto out_overflow;
7374         entry->prev_cookie = entry->cookie;
7375         p = xdr_decode_hyper(p, &entry->cookie);
7376         entry->len = be32_to_cpup(p);
7377
7378         p = xdr_inline_decode(xdr, entry->len);
7379         if (unlikely(!p))
7380                 goto out_overflow;
7381         entry->name = (const char *) p;
7382
7383         /*
7384          * In case the server doesn't return an inode number,
7385          * we fake one here.  (We don't use inode number 0,
7386          * since glibc seems to choke on it...)
7387          */
7388         entry->ino = 1;
7389         entry->fattr->valid = 0;
7390
7391         if (decode_attr_bitmap(xdr, bitmap) < 0)
7392                 goto out_overflow;
7393
7394         if (decode_attr_length(xdr, &len, &savep) < 0)
7395                 goto out_overflow;
7396
7397         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7398                         NULL, entry->label, entry->server) < 0)
7399                 goto out_overflow;
7400         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7401                 entry->ino = entry->fattr->mounted_on_fileid;
7402         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7403                 entry->ino = entry->fattr->fileid;
7404
7405         entry->d_type = DT_UNKNOWN;
7406         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7407                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7408
7409         return 0;
7410
7411 out_overflow:
7412         print_overflow_msg(__func__, xdr);
7413         return -EAGAIN;
7414 }
7415
7416 /*
7417  * We need to translate between nfs status return values and
7418  * the local errno values which may not be the same.
7419  */
7420 static struct {
7421         int stat;
7422         int errno;
7423 } nfs_errtbl[] = {
7424         { NFS4_OK,              0               },
7425         { NFS4ERR_PERM,         -EPERM          },
7426         { NFS4ERR_NOENT,        -ENOENT         },
7427         { NFS4ERR_IO,           -errno_NFSERR_IO},
7428         { NFS4ERR_NXIO,         -ENXIO          },
7429         { NFS4ERR_ACCESS,       -EACCES         },
7430         { NFS4ERR_EXIST,        -EEXIST         },
7431         { NFS4ERR_XDEV,         -EXDEV          },
7432         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7433         { NFS4ERR_ISDIR,        -EISDIR         },
7434         { NFS4ERR_INVAL,        -EINVAL         },
7435         { NFS4ERR_FBIG,         -EFBIG          },
7436         { NFS4ERR_NOSPC,        -ENOSPC         },
7437         { NFS4ERR_ROFS,         -EROFS          },
7438         { NFS4ERR_MLINK,        -EMLINK         },
7439         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7440         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7441         { NFS4ERR_DQUOT,        -EDQUOT         },
7442         { NFS4ERR_STALE,        -ESTALE         },
7443         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7444         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7445         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7446         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7447         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7448         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7449         { NFS4ERR_LOCKED,       -EAGAIN         },
7450         { NFS4ERR_SYMLINK,      -ELOOP          },
7451         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7452         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7453         { -1,                   -EIO            }
7454 };
7455
7456 /*
7457  * Convert an NFS error code to a local one.
7458  * This one is used jointly by NFSv2 and NFSv3.
7459  */
7460 static int
7461 nfs4_stat_to_errno(int stat)
7462 {
7463         int i;
7464         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7465                 if (nfs_errtbl[i].stat == stat)
7466                         return nfs_errtbl[i].errno;
7467         }
7468         if (stat <= 10000 || stat > 10100) {
7469                 /* The server is looney tunes. */
7470                 return -EREMOTEIO;
7471         }
7472         /* If we cannot translate the error, the recovery routines should
7473          * handle it.
7474          * Note: remaining NFSv4 error codes have values > 10000, so should
7475          * not conflict with native Linux error codes.
7476          */
7477         return -stat;
7478 }
7479
7480 #ifdef CONFIG_NFS_V4_2
7481 #include "nfs42xdr.c"
7482 #endif /* CONFIG_NFS_V4_2 */
7483
7484 #define PROC(proc, argtype, restype)                            \
7485 [NFSPROC4_CLNT_##proc] = {                                      \
7486         .p_proc   = NFSPROC4_COMPOUND,                          \
7487         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7488         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7489         .p_arglen = NFS4_##argtype##_sz,                        \
7490         .p_replen = NFS4_##restype##_sz,                        \
7491         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7492         .p_name   = #proc,                                      \
7493 }
7494
7495 #define STUB(proc)              \
7496 [NFSPROC4_CLNT_##proc] = {      \
7497         .p_name = #proc,        \
7498 }
7499
7500 struct rpc_procinfo     nfs4_procedures[] = {
7501         PROC(READ,              enc_read,               dec_read),
7502         PROC(WRITE,             enc_write,              dec_write),
7503         PROC(COMMIT,            enc_commit,             dec_commit),
7504         PROC(OPEN,              enc_open,               dec_open),
7505         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7506         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7507         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7508         PROC(CLOSE,             enc_close,              dec_close),
7509         PROC(SETATTR,           enc_setattr,            dec_setattr),
7510         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7511         PROC(RENEW,             enc_renew,              dec_renew),
7512         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7513         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7514         PROC(LOCK,              enc_lock,               dec_lock),
7515         PROC(LOCKT,             enc_lockt,              dec_lockt),
7516         PROC(LOCKU,             enc_locku,              dec_locku),
7517         PROC(ACCESS,            enc_access,             dec_access),
7518         PROC(GETATTR,           enc_getattr,            dec_getattr),
7519         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7520         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7521         PROC(REMOVE,            enc_remove,             dec_remove),
7522         PROC(RENAME,            enc_rename,             dec_rename),
7523         PROC(LINK,              enc_link,               dec_link),
7524         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7525         PROC(CREATE,            enc_create,             dec_create),
7526         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7527         PROC(STATFS,            enc_statfs,             dec_statfs),
7528         PROC(READLINK,          enc_readlink,           dec_readlink),
7529         PROC(READDIR,           enc_readdir,            dec_readdir),
7530         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7531         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7532         PROC(GETACL,            enc_getacl,             dec_getacl),
7533         PROC(SETACL,            enc_setacl,             dec_setacl),
7534         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7535         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7536         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7537         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7538 #if defined(CONFIG_NFS_V4_1)
7539         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7540         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7541         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7542         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7543         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7544         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7545         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7546         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7547         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7548         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7549         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7550         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7551         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7552         STUB(GETDEVICELIST),
7553         PROC(BIND_CONN_TO_SESSION,
7554                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7555         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7556 #endif /* CONFIG_NFS_V4_1 */
7557 #ifdef CONFIG_NFS_V4_2
7558         PROC(SEEK,              enc_seek,               dec_seek),
7559         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7560         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7561         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7562         PROC(CLONE,             enc_clone,              dec_clone),
7563         PROC(COPY,              enc_copy,               dec_copy),
7564 #endif /* CONFIG_NFS_V4_2 */
7565 };
7566
7567 const struct rpc_version nfs_version4 = {
7568         .number                 = 4,
7569         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7570         .procs                  = nfs4_procedures
7571 };
7572
7573 /*
7574  * Local variables:
7575  *  c-basic-offset: 8
7576  * End:
7577  */