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 struct nfs_server *server,
1004                                 bool excl_check, const umode_t *umask)
1005 {
1006         char owner_name[IDMAP_NAMESZ];
1007         char owner_group[IDMAP_NAMESZ];
1008         int owner_namelen = 0;
1009         int owner_grouplen = 0;
1010         __be32 *p;
1011         unsigned i;
1012         uint32_t len = 0;
1013         uint32_t bmval_len;
1014         uint32_t bmval[3] = { 0 };
1015
1016         /*
1017          * We reserve enough space to write the entire attribute buffer at once.
1018          */
1019         if (iap->ia_valid & ATTR_SIZE) {
1020                 bmval[0] |= FATTR4_WORD0_SIZE;
1021                 len += 8;
1022         }
1023         if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1024                 umask = NULL;
1025         if (iap->ia_valid & ATTR_MODE) {
1026                 if (umask) {
1027                         bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1028                         len += 8;
1029                 } else {
1030                         bmval[1] |= FATTR4_WORD1_MODE;
1031                         len += 4;
1032                 }
1033         }
1034         if (iap->ia_valid & ATTR_UID) {
1035                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1036                 if (owner_namelen < 0) {
1037                         dprintk("nfs: couldn't resolve uid %d to string\n",
1038                                         from_kuid(&init_user_ns, iap->ia_uid));
1039                         /* XXX */
1040                         strcpy(owner_name, "nobody");
1041                         owner_namelen = sizeof("nobody") - 1;
1042                         /* goto out; */
1043                 }
1044                 bmval[1] |= FATTR4_WORD1_OWNER;
1045                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1046         }
1047         if (iap->ia_valid & ATTR_GID) {
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 (iap->ia_valid & ATTR_ATIME_SET) {
1060                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1061                 len += 16;
1062         } else if (iap->ia_valid & ATTR_ATIME) {
1063                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1064                 len += 4;
1065         }
1066         if (iap->ia_valid & ATTR_MTIME_SET) {
1067                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1068                 len += 16;
1069         } else if (iap->ia_valid & ATTR_MTIME) {
1070                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 len += 4;
1072         }
1073
1074         if (excl_check) {
1075                 const u32 *excl_bmval = server->exclcreat_bitmask;
1076                 bmval[0] &= excl_bmval[0];
1077                 bmval[1] &= excl_bmval[1];
1078                 bmval[2] &= excl_bmval[2];
1079
1080                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1081                         label = NULL;
1082         }
1083
1084         if (label) {
1085                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1086                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1087         }
1088
1089         if (bmval[2] != 0)
1090                 bmval_len = 3;
1091         else if (bmval[1] != 0)
1092                 bmval_len = 2;
1093         else
1094                 bmval_len = 1;
1095
1096         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1097
1098         *p++ = cpu_to_be32(bmval_len);
1099         for (i = 0; i < bmval_len; i++)
1100                 *p++ = cpu_to_be32(bmval[i]);
1101         *p++ = cpu_to_be32(len);
1102
1103         if (bmval[0] & FATTR4_WORD0_SIZE)
1104                 p = xdr_encode_hyper(p, iap->ia_size);
1105         if (bmval[1] & FATTR4_WORD1_MODE)
1106                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1107         if (bmval[1] & FATTR4_WORD1_OWNER)
1108                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1109         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1110                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1111         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1112                 if (iap->ia_valid & ATTR_ATIME_SET) {
1113                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1114                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1115                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1116                 } else
1117                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1118         }
1119         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1120                 if (iap->ia_valid & ATTR_MTIME_SET) {
1121                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1123                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1124                 } else
1125                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126         }
1127         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1128                 *p++ = cpu_to_be32(label->lfs);
1129                 *p++ = cpu_to_be32(label->pi);
1130                 *p++ = cpu_to_be32(label->len);
1131                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1132         }
1133         if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1134                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1135                 *p++ = cpu_to_be32(*umask);
1136         }
1137
1138 /* out: */
1139 }
1140
1141 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1142 {
1143         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1144         encode_uint32(xdr, access);
1145 }
1146
1147 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1148 {
1149         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1150         encode_nfs4_seqid(xdr, arg->seqid);
1151         encode_nfs4_stateid(xdr, &arg->stateid);
1152 }
1153
1154 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1155 {
1156         __be32 *p;
1157
1158         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1159         p = reserve_space(xdr, 12);
1160         p = xdr_encode_hyper(p, args->offset);
1161         *p = cpu_to_be32(args->count);
1162 }
1163
1164 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1165 {
1166         __be32 *p;
1167
1168         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1169         encode_uint32(xdr, create->ftype);
1170
1171         switch (create->ftype) {
1172         case NF4LNK:
1173                 p = reserve_space(xdr, 4);
1174                 *p = cpu_to_be32(create->u.symlink.len);
1175                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1176                                 create->u.symlink.len);
1177                 xdr->buf->flags |= XDRBUF_WRITE;
1178                 break;
1179
1180         case NF4BLK: case NF4CHR:
1181                 p = reserve_space(xdr, 8);
1182                 *p++ = cpu_to_be32(create->u.device.specdata1);
1183                 *p = cpu_to_be32(create->u.device.specdata2);
1184                 break;
1185
1186         default:
1187                 break;
1188         }
1189
1190         encode_string(xdr, create->name->len, create->name->name);
1191         encode_attrs(xdr, create->attrs, create->label, create->server, false,
1192                      &create->umask);
1193 }
1194
1195 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1196 {
1197         __be32 *p;
1198
1199         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1200         p = reserve_space(xdr, 8);
1201         *p++ = cpu_to_be32(1);
1202         *p = cpu_to_be32(bitmap);
1203 }
1204
1205 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1206 {
1207         __be32 *p;
1208
1209         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210         p = reserve_space(xdr, 12);
1211         *p++ = cpu_to_be32(2);
1212         *p++ = cpu_to_be32(bm0);
1213         *p = cpu_to_be32(bm1);
1214 }
1215
1216 static void
1217 encode_getattr_three(struct xdr_stream *xdr,
1218                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1219                      struct compound_hdr *hdr)
1220 {
1221         __be32 *p;
1222
1223         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1224         if (bm2) {
1225                 p = reserve_space(xdr, 16);
1226                 *p++ = cpu_to_be32(3);
1227                 *p++ = cpu_to_be32(bm0);
1228                 *p++ = cpu_to_be32(bm1);
1229                 *p = cpu_to_be32(bm2);
1230         } else if (bm1) {
1231                 p = reserve_space(xdr, 12);
1232                 *p++ = cpu_to_be32(2);
1233                 *p++ = cpu_to_be32(bm0);
1234                 *p = cpu_to_be32(bm1);
1235         } else {
1236                 p = reserve_space(xdr, 8);
1237                 *p++ = cpu_to_be32(1);
1238                 *p = cpu_to_be32(bm0);
1239         }
1240 }
1241
1242 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243 {
1244         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1245                            bitmask[1] & nfs4_fattr_bitmap[1],
1246                            bitmask[2] & nfs4_fattr_bitmap[2],
1247                            hdr);
1248 }
1249
1250 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1251                                  const u32 *open_bitmap,
1252                                  struct compound_hdr *hdr)
1253 {
1254         encode_getattr_three(xdr,
1255                              bitmask[0] & open_bitmap[0],
1256                              bitmask[1] & open_bitmap[1],
1257                              bitmask[2] & open_bitmap[2],
1258                              hdr);
1259 }
1260
1261 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1262 {
1263         encode_getattr_three(xdr,
1264                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1265                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1266                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1267                              hdr);
1268 }
1269
1270 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1271 {
1272         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1273                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1274 }
1275
1276 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1277 {
1278         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1279 }
1280
1281 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1282 {
1283         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1284         encode_string(xdr, name->len, name->name);
1285 }
1286
1287 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1288 {
1289         if (fl->fl_type == F_RDLCK)
1290                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1291         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1292 }
1293
1294 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1295 {
1296         if (fl->fl_end == OFFSET_MAX)
1297                 return ~(uint64_t)0;
1298         return fl->fl_end - fl->fl_start + 1;
1299 }
1300
1301 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1302 {
1303         __be32 *p;
1304
1305         p = reserve_space(xdr, 32);
1306         p = xdr_encode_hyper(p, lowner->clientid);
1307         *p++ = cpu_to_be32(20);
1308         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1309         *p++ = cpu_to_be32(lowner->s_dev);
1310         xdr_encode_hyper(p, lowner->id);
1311 }
1312
1313 /*
1314  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1315  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1316  */
1317 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1318 {
1319         __be32 *p;
1320
1321         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1322         p = reserve_space(xdr, 28);
1323         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1324         *p++ = cpu_to_be32(args->reclaim);
1325         p = xdr_encode_hyper(p, args->fl->fl_start);
1326         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1327         *p = cpu_to_be32(args->new_lock_owner);
1328         if (args->new_lock_owner){
1329                 encode_nfs4_seqid(xdr, args->open_seqid);
1330                 encode_nfs4_stateid(xdr, &args->open_stateid);
1331                 encode_nfs4_seqid(xdr, args->lock_seqid);
1332                 encode_lockowner(xdr, &args->lock_owner);
1333         }
1334         else {
1335                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1336                 encode_nfs4_seqid(xdr, args->lock_seqid);
1337         }
1338 }
1339
1340 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1341 {
1342         __be32 *p;
1343
1344         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1345         p = reserve_space(xdr, 20);
1346         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1347         p = xdr_encode_hyper(p, args->fl->fl_start);
1348         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1349         encode_lockowner(xdr, &args->lock_owner);
1350 }
1351
1352 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1353 {
1354         __be32 *p;
1355
1356         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1357         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1358         encode_nfs4_seqid(xdr, args->seqid);
1359         encode_nfs4_stateid(xdr, &args->stateid);
1360         p = reserve_space(xdr, 16);
1361         p = xdr_encode_hyper(p, args->fl->fl_start);
1362         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1363 }
1364
1365 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1366 {
1367         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1368         encode_lockowner(xdr, lowner);
1369 }
1370
1371 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1372 {
1373         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1374         encode_string(xdr, name->len, name->name);
1375 }
1376
1377 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1378 {
1379         __be32 *p;
1380
1381         p = reserve_space(xdr, 8);
1382         *p++ = cpu_to_be32(share_access);
1383         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1384 }
1385
1386 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1387 {
1388         __be32 *p;
1389  /*
1390  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1391  * owner 4 = 32
1392  */
1393         encode_nfs4_seqid(xdr, arg->seqid);
1394         encode_share_access(xdr, arg->share_access);
1395         p = reserve_space(xdr, 36);
1396         p = xdr_encode_hyper(p, arg->clientid);
1397         *p++ = cpu_to_be32(24);
1398         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1399         *p++ = cpu_to_be32(arg->server->s_dev);
1400         *p++ = cpu_to_be32(arg->id.uniquifier);
1401         xdr_encode_hyper(p, arg->id.create_time);
1402 }
1403
1404 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1405 {
1406         __be32 *p;
1407
1408         p = reserve_space(xdr, 4);
1409         switch(arg->createmode) {
1410         case NFS4_CREATE_UNCHECKED:
1411                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1412                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1413                              &arg->umask);
1414                 break;
1415         case NFS4_CREATE_GUARDED:
1416                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1417                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1418                              &arg->umask);
1419                 break;
1420         case NFS4_CREATE_EXCLUSIVE:
1421                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1422                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1423                 break;
1424         case NFS4_CREATE_EXCLUSIVE4_1:
1425                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1426                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1427                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1428                              &arg->umask);
1429         }
1430 }
1431
1432 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1433 {
1434         __be32 *p;
1435
1436         p = reserve_space(xdr, 4);
1437         switch (arg->open_flags & O_CREAT) {
1438         case 0:
1439                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1440                 break;
1441         default:
1442                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1443                 encode_createmode(xdr, arg);
1444         }
1445 }
1446
1447 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1448 {
1449         __be32 *p;
1450
1451         p = reserve_space(xdr, 4);
1452         switch (delegation_type) {
1453         case 0:
1454                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1455                 break;
1456         case FMODE_READ:
1457                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1458                 break;
1459         case FMODE_WRITE|FMODE_READ:
1460                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1461                 break;
1462         default:
1463                 BUG();
1464         }
1465 }
1466
1467 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4);
1472         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1473         encode_string(xdr, name->len, name->name);
1474 }
1475
1476 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1477 {
1478         __be32 *p;
1479
1480         p = reserve_space(xdr, 4);
1481         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1482         encode_delegation_type(xdr, type);
1483 }
1484
1485 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1486 {
1487         __be32 *p;
1488
1489         p = reserve_space(xdr, 4);
1490         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1491         encode_nfs4_stateid(xdr, stateid);
1492         encode_string(xdr, name->len, name->name);
1493 }
1494
1495 static inline void encode_claim_fh(struct xdr_stream *xdr)
1496 {
1497         __be32 *p;
1498
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1501 }
1502
1503 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1504 {
1505         __be32 *p;
1506
1507         p = reserve_space(xdr, 4);
1508         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1509         encode_nfs4_stateid(xdr, stateid);
1510 }
1511
1512 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1513 {
1514         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1515         encode_openhdr(xdr, arg);
1516         encode_opentype(xdr, arg);
1517         switch (arg->claim) {
1518         case NFS4_OPEN_CLAIM_NULL:
1519                 encode_claim_null(xdr, arg->name);
1520                 break;
1521         case NFS4_OPEN_CLAIM_PREVIOUS:
1522                 encode_claim_previous(xdr, arg->u.delegation_type);
1523                 break;
1524         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1525                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1526                 break;
1527         case NFS4_OPEN_CLAIM_FH:
1528                 encode_claim_fh(xdr);
1529                 break;
1530         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1531                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1532                 break;
1533         default:
1534                 BUG();
1535         }
1536 }
1537
1538 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1539 {
1540         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1541         encode_nfs4_stateid(xdr, arg->stateid);
1542         encode_nfs4_seqid(xdr, arg->seqid);
1543 }
1544
1545 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1546 {
1547         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1548         encode_nfs4_stateid(xdr, &arg->stateid);
1549         encode_nfs4_seqid(xdr, arg->seqid);
1550         encode_share_access(xdr, arg->share_access);
1551 }
1552
1553 static void
1554 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1555 {
1556         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1557         encode_string(xdr, fh->size, fh->data);
1558 }
1559
1560 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1561 {
1562         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1563 }
1564
1565 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1566                         struct compound_hdr *hdr)
1567 {
1568         __be32 *p;
1569
1570         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1571         encode_nfs4_stateid(xdr, &args->stateid);
1572
1573         p = reserve_space(xdr, 12);
1574         p = xdr_encode_hyper(p, args->offset);
1575         *p = cpu_to_be32(args->count);
1576 }
1577
1578 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1579 {
1580         uint32_t attrs[3] = {
1581                 FATTR4_WORD0_RDATTR_ERROR,
1582                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1583         };
1584         uint32_t dircount = readdir->count >> 1;
1585         __be32 *p, verf[2];
1586         uint32_t attrlen = 0;
1587         unsigned int i;
1588
1589         if (readdir->plus) {
1590                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1591                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1592                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1593                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1594                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1595                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1596                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1597                 dircount >>= 1;
1598         }
1599         /* Use mounted_on_fileid only if the server supports it */
1600         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1601                 attrs[0] |= FATTR4_WORD0_FILEID;
1602         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1603                 attrs[i] &= readdir->bitmask[i];
1604                 if (attrs[i] != 0)
1605                         attrlen = i+1;
1606         }
1607
1608         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1609         encode_uint64(xdr, readdir->cookie);
1610         encode_nfs4_verifier(xdr, &readdir->verifier);
1611         p = reserve_space(xdr, 12 + (attrlen << 2));
1612         *p++ = cpu_to_be32(dircount);
1613         *p++ = cpu_to_be32(readdir->count);
1614         *p++ = cpu_to_be32(attrlen);
1615         for (i = 0; i < attrlen; i++)
1616                 *p++ = cpu_to_be32(attrs[i]);
1617         memcpy(verf, readdir->verifier.data, sizeof(verf));
1618
1619         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1620                         __func__,
1621                         (unsigned long long)readdir->cookie,
1622                         verf[0], verf[1],
1623                         attrs[0] & readdir->bitmask[0],
1624                         attrs[1] & readdir->bitmask[1],
1625                         attrs[2] & readdir->bitmask[2]);
1626 }
1627
1628 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1629 {
1630         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1631 }
1632
1633 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1634 {
1635         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1636         encode_string(xdr, name->len, name->name);
1637 }
1638
1639 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1640 {
1641         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1642         encode_string(xdr, oldname->len, oldname->name);
1643         encode_string(xdr, newname->len, newname->name);
1644 }
1645
1646 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1647                          struct compound_hdr *hdr)
1648 {
1649         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1650         encode_uint64(xdr, clid);
1651 }
1652
1653 static void
1654 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1655 {
1656         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1657 }
1658
1659 static void
1660 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1661 {
1662         __be32 *p;
1663
1664         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1665         encode_nfs4_stateid(xdr, &zero_stateid);
1666         p = reserve_space(xdr, 2*4);
1667         *p++ = cpu_to_be32(1);
1668         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1669         p = reserve_space(xdr, 4);
1670         *p = cpu_to_be32(arg->acl_len);
1671         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1672 }
1673
1674 static void
1675 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1676 {
1677         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1678 }
1679
1680 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1681 {
1682         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1683         encode_nfs4_stateid(xdr, &arg->stateid);
1684         encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1685 }
1686
1687 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1688 {
1689         __be32 *p;
1690
1691         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1692         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1693
1694         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1695                         setclientid->sc_clnt->cl_owner_id);
1696         p = reserve_space(xdr, 4);
1697         *p = cpu_to_be32(setclientid->sc_prog);
1698         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1699         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1700         p = reserve_space(xdr, 4);
1701         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1702 }
1703
1704 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1705 {
1706         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1707                         decode_setclientid_confirm_maxsz, hdr);
1708         encode_uint64(xdr, arg->clientid);
1709         encode_nfs4_verifier(xdr, &arg->confirm);
1710 }
1711
1712 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1713                          struct compound_hdr *hdr)
1714 {
1715         __be32 *p;
1716
1717         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1718         encode_nfs4_stateid(xdr, &args->stateid);
1719
1720         p = reserve_space(xdr, 16);
1721         p = xdr_encode_hyper(p, args->offset);
1722         *p++ = cpu_to_be32(args->stable);
1723         *p = cpu_to_be32(args->count);
1724
1725         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1726 }
1727
1728 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1729 {
1730         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1731         encode_nfs4_stateid(xdr, stateid);
1732 }
1733
1734 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1735 {
1736         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1737         encode_string(xdr, name->len, name->name);
1738 }
1739
1740 #if defined(CONFIG_NFS_V4_1)
1741 /* NFSv4.1 operations */
1742 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1743                                    struct nfs41_bind_conn_to_session_args *args,
1744                                    struct compound_hdr *hdr)
1745 {
1746         __be32 *p;
1747
1748         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1749                 decode_bind_conn_to_session_maxsz, hdr);
1750         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1751         p = xdr_reserve_space(xdr, 8);
1752         *p++ = cpu_to_be32(args->dir);
1753         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1754 }
1755
1756 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1757 {
1758         unsigned int i;
1759         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1760         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1761                 encode_uint32(xdr, op_map->u.words[i]);
1762 }
1763
1764 static void encode_exchange_id(struct xdr_stream *xdr,
1765                                struct nfs41_exchange_id_args *args,
1766                                struct compound_hdr *hdr)
1767 {
1768         __be32 *p;
1769         char impl_name[IMPL_NAME_LIMIT];
1770         int len = 0;
1771
1772         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1773         encode_nfs4_verifier(xdr, args->verifier);
1774
1775         encode_string(xdr, strlen(args->client->cl_owner_id),
1776                         args->client->cl_owner_id);
1777
1778         encode_uint32(xdr, args->flags);
1779         encode_uint32(xdr, args->state_protect.how);
1780
1781         switch (args->state_protect.how) {
1782         case SP4_NONE:
1783                 break;
1784         case SP4_MACH_CRED:
1785                 encode_op_map(xdr, &args->state_protect.enforce);
1786                 encode_op_map(xdr, &args->state_protect.allow);
1787                 break;
1788         default:
1789                 WARN_ON_ONCE(1);
1790                 break;
1791         }
1792
1793         if (send_implementation_id &&
1794             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1795             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1796                 <= sizeof(impl_name) + 1)
1797                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1798                                utsname()->sysname, utsname()->release,
1799                                utsname()->version, utsname()->machine);
1800
1801         if (len > 0) {
1802                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1803
1804                 encode_string(xdr,
1805                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1806                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1807                 encode_string(xdr, len, impl_name);
1808                 /* just send zeros for nii_date - the date is in nii_name */
1809                 p = reserve_space(xdr, 12);
1810                 p = xdr_encode_hyper(p, 0);
1811                 *p = cpu_to_be32(0);
1812         } else
1813                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1814 }
1815
1816 static void encode_create_session(struct xdr_stream *xdr,
1817                                   struct nfs41_create_session_args *args,
1818                                   struct compound_hdr *hdr)
1819 {
1820         __be32 *p;
1821         struct nfs_client *clp = args->client;
1822         struct rpc_clnt *clnt = clp->cl_rpcclient;
1823         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1824         u32 max_resp_sz_cached;
1825
1826         /*
1827          * Assumes OPEN is the biggest non-idempotent compound.
1828          * 2 is the verifier.
1829          */
1830         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1831                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1832
1833         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1834         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1835         p = xdr_encode_hyper(p, args->clientid);
1836         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1837         *p++ = cpu_to_be32(args->flags);                        /*flags */
1838
1839         /* Fore Channel */
1840         *p++ = cpu_to_be32(0);                          /* header padding size */
1841         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1842         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1843         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1844         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1845         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1846         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1847
1848         /* Back Channel */
1849         *p++ = cpu_to_be32(0);                          /* header padding size */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1851         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1852         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1853         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1854         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1855         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1856
1857         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1858         *p++ = cpu_to_be32(1);
1859         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1860
1861         /* authsys_parms rfc1831 */
1862         *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1863         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1864         *p++ = cpu_to_be32(0);                          /* UID */
1865         *p++ = cpu_to_be32(0);                          /* GID */
1866         *p = cpu_to_be32(0);                            /* No more gids */
1867 }
1868
1869 static void encode_destroy_session(struct xdr_stream *xdr,
1870                                    struct nfs4_session *session,
1871                                    struct compound_hdr *hdr)
1872 {
1873         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1874         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1875 }
1876
1877 static void encode_destroy_clientid(struct xdr_stream *xdr,
1878                                    uint64_t clientid,
1879                                    struct compound_hdr *hdr)
1880 {
1881         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1882         encode_uint64(xdr, clientid);
1883 }
1884
1885 static void encode_reclaim_complete(struct xdr_stream *xdr,
1886                                     struct nfs41_reclaim_complete_args *args,
1887                                     struct compound_hdr *hdr)
1888 {
1889         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1890         encode_uint32(xdr, args->one_fs);
1891 }
1892 #endif /* CONFIG_NFS_V4_1 */
1893
1894 static void encode_sequence(struct xdr_stream *xdr,
1895                             const struct nfs4_sequence_args *args,
1896                             struct compound_hdr *hdr)
1897 {
1898 #if defined(CONFIG_NFS_V4_1)
1899         struct nfs4_session *session;
1900         struct nfs4_slot_table *tp;
1901         struct nfs4_slot *slot = args->sa_slot;
1902         __be32 *p;
1903
1904         tp = slot->table;
1905         session = tp->session;
1906         if (!session)
1907                 return;
1908
1909         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1910
1911         /*
1912          * Sessionid + seqid + slotid + max slotid + cache_this
1913          */
1914         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1915                 "max_slotid=%d cache_this=%d\n",
1916                 __func__,
1917                 ((u32 *)session->sess_id.data)[0],
1918                 ((u32 *)session->sess_id.data)[1],
1919                 ((u32 *)session->sess_id.data)[2],
1920                 ((u32 *)session->sess_id.data)[3],
1921                 slot->seq_nr, slot->slot_nr,
1922                 tp->highest_used_slotid, args->sa_cache_this);
1923         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1924         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1925         *p++ = cpu_to_be32(slot->seq_nr);
1926         *p++ = cpu_to_be32(slot->slot_nr);
1927         *p++ = cpu_to_be32(tp->highest_used_slotid);
1928         *p = cpu_to_be32(args->sa_cache_this);
1929 #endif /* CONFIG_NFS_V4_1 */
1930 }
1931
1932 #ifdef CONFIG_NFS_V4_1
1933 static void
1934 encode_getdeviceinfo(struct xdr_stream *xdr,
1935                      const struct nfs4_getdeviceinfo_args *args,
1936                      struct compound_hdr *hdr)
1937 {
1938         __be32 *p;
1939
1940         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1941         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1942         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1943                                     NFS4_DEVICEID4_SIZE);
1944         *p++ = cpu_to_be32(args->pdev->layout_type);
1945         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1946
1947         p = reserve_space(xdr, 4 + 4);
1948         *p++ = cpu_to_be32(1);                  /* bitmap length */
1949         *p++ = cpu_to_be32(args->notify_types);
1950 }
1951
1952 static void
1953 encode_layoutget(struct xdr_stream *xdr,
1954                       const struct nfs4_layoutget_args *args,
1955                       struct compound_hdr *hdr)
1956 {
1957         __be32 *p;
1958
1959         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1960         p = reserve_space(xdr, 36);
1961         *p++ = cpu_to_be32(0);     /* Signal layout available */
1962         *p++ = cpu_to_be32(args->type);
1963         *p++ = cpu_to_be32(args->range.iomode);
1964         p = xdr_encode_hyper(p, args->range.offset);
1965         p = xdr_encode_hyper(p, args->range.length);
1966         p = xdr_encode_hyper(p, args->minlength);
1967         encode_nfs4_stateid(xdr, &args->stateid);
1968         encode_uint32(xdr, args->maxcount);
1969
1970         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1971                 __func__,
1972                 args->type,
1973                 args->range.iomode,
1974                 (unsigned long)args->range.offset,
1975                 (unsigned long)args->range.length,
1976                 args->maxcount);
1977 }
1978
1979 static int
1980 encode_layoutcommit(struct xdr_stream *xdr,
1981                     struct inode *inode,
1982                     struct nfs4_layoutcommit_args *args,
1983                     struct compound_hdr *hdr)
1984 {
1985         __be32 *p;
1986
1987         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1988                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1989
1990         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1991         p = reserve_space(xdr, 20);
1992         /* Only whole file layouts */
1993         p = xdr_encode_hyper(p, 0); /* offset */
1994         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1995         *p = cpu_to_be32(0); /* reclaim */
1996         encode_nfs4_stateid(xdr, &args->stateid);
1997         if (args->lastbytewritten != U64_MAX) {
1998                 p = reserve_space(xdr, 20);
1999                 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2000                 p = xdr_encode_hyper(p, args->lastbytewritten);
2001         } else {
2002                 p = reserve_space(xdr, 12);
2003                 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2004         }
2005         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2006         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2007
2008         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2009                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2010                         NFS_I(inode)->layout, xdr, args);
2011         } else {
2012                 encode_uint32(xdr, args->layoutupdate_len);
2013                 if (args->layoutupdate_pages) {
2014                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2015                                         args->layoutupdate_len);
2016                 }
2017         }
2018
2019         return 0;
2020 }
2021
2022 static void
2023 encode_layoutreturn(struct xdr_stream *xdr,
2024                     const struct nfs4_layoutreturn_args *args,
2025                     struct compound_hdr *hdr)
2026 {
2027         const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2028         __be32 *p;
2029
2030         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2031         p = reserve_space(xdr, 16);
2032         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2033         *p++ = cpu_to_be32(args->layout_type);
2034         *p++ = cpu_to_be32(args->range.iomode);
2035         *p = cpu_to_be32(RETURN_FILE);
2036         p = reserve_space(xdr, 16);
2037         p = xdr_encode_hyper(p, args->range.offset);
2038         p = xdr_encode_hyper(p, args->range.length);
2039         spin_lock(&args->inode->i_lock);
2040         encode_nfs4_stateid(xdr, &args->stateid);
2041         spin_unlock(&args->inode->i_lock);
2042         if (args->ld_private->ops && args->ld_private->ops->encode)
2043                 args->ld_private->ops->encode(xdr, args, args->ld_private);
2044         else if (lr_ops->encode_layoutreturn)
2045                 lr_ops->encode_layoutreturn(xdr, args);
2046         else
2047                 encode_uint32(xdr, 0);
2048 }
2049
2050 static int
2051 encode_secinfo_no_name(struct xdr_stream *xdr,
2052                        const struct nfs41_secinfo_no_name_args *args,
2053                        struct compound_hdr *hdr)
2054 {
2055         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2056         encode_uint32(xdr, args->style);
2057         return 0;
2058 }
2059
2060 static void encode_test_stateid(struct xdr_stream *xdr,
2061                                 struct nfs41_test_stateid_args *args,
2062                                 struct compound_hdr *hdr)
2063 {
2064         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2065         encode_uint32(xdr, 1);
2066         encode_nfs4_stateid(xdr, args->stateid);
2067 }
2068
2069 static void encode_free_stateid(struct xdr_stream *xdr,
2070                                 struct nfs41_free_stateid_args *args,
2071                                 struct compound_hdr *hdr)
2072 {
2073         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2074         encode_nfs4_stateid(xdr, &args->stateid);
2075 }
2076 #else
2077 static inline void
2078 encode_layoutreturn(struct xdr_stream *xdr,
2079                     const struct nfs4_layoutreturn_args *args,
2080                     struct compound_hdr *hdr)
2081 {
2082 }
2083 #endif /* CONFIG_NFS_V4_1 */
2084
2085 /*
2086  * END OF "GENERIC" ENCODE ROUTINES.
2087  */
2088
2089 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2090 {
2091 #if defined(CONFIG_NFS_V4_1)
2092         struct nfs4_session *session = args->sa_slot->table->session;
2093         if (session)
2094                 return session->clp->cl_mvops->minor_version;
2095 #endif /* CONFIG_NFS_V4_1 */
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode an ACCESS request
2101  */
2102 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2103                                 const struct nfs4_accessargs *args)
2104 {
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         encode_compound_hdr(xdr, req, &hdr);
2110         encode_sequence(xdr, &args->seq_args, &hdr);
2111         encode_putfh(xdr, args->fh, &hdr);
2112         encode_access(xdr, args->access, &hdr);
2113         encode_getfattr(xdr, args->bitmask, &hdr);
2114         encode_nops(&hdr);
2115 }
2116
2117 /*
2118  * Encode LOOKUP request
2119  */
2120 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2121                                 const struct nfs4_lookup_arg *args)
2122 {
2123         struct compound_hdr hdr = {
2124                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2125         };
2126
2127         encode_compound_hdr(xdr, req, &hdr);
2128         encode_sequence(xdr, &args->seq_args, &hdr);
2129         encode_putfh(xdr, args->dir_fh, &hdr);
2130         encode_lookup(xdr, args->name, &hdr);
2131         encode_getfh(xdr, &hdr);
2132         encode_getfattr(xdr, args->bitmask, &hdr);
2133         encode_nops(&hdr);
2134 }
2135
2136 /*
2137  * Encode LOOKUP_ROOT request
2138  */
2139 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2140                                      struct xdr_stream *xdr,
2141                                      const struct nfs4_lookup_root_arg *args)
2142 {
2143         struct compound_hdr hdr = {
2144                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2145         };
2146
2147         encode_compound_hdr(xdr, req, &hdr);
2148         encode_sequence(xdr, &args->seq_args, &hdr);
2149         encode_putrootfh(xdr, &hdr);
2150         encode_getfh(xdr, &hdr);
2151         encode_getfattr(xdr, args->bitmask, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode REMOVE request
2157  */
2158 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                 const struct nfs_removeargs *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_remove(xdr, &args->name, &hdr);
2169         encode_nops(&hdr);
2170 }
2171
2172 /*
2173  * Encode RENAME request
2174  */
2175 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2176                                 const struct nfs_renameargs *args)
2177 {
2178         struct compound_hdr hdr = {
2179                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180         };
2181
2182         encode_compound_hdr(xdr, req, &hdr);
2183         encode_sequence(xdr, &args->seq_args, &hdr);
2184         encode_putfh(xdr, args->old_dir, &hdr);
2185         encode_savefh(xdr, &hdr);
2186         encode_putfh(xdr, args->new_dir, &hdr);
2187         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2188         encode_nops(&hdr);
2189 }
2190
2191 /*
2192  * Encode LINK request
2193  */
2194 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2195                              const struct nfs4_link_arg *args)
2196 {
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200
2201         encode_compound_hdr(xdr, req, &hdr);
2202         encode_sequence(xdr, &args->seq_args, &hdr);
2203         encode_putfh(xdr, args->fh, &hdr);
2204         encode_savefh(xdr, &hdr);
2205         encode_putfh(xdr, args->dir_fh, &hdr);
2206         encode_link(xdr, args->name, &hdr);
2207         encode_restorefh(xdr, &hdr);
2208         encode_getfattr(xdr, args->bitmask, &hdr);
2209         encode_nops(&hdr);
2210 }
2211
2212 /*
2213  * Encode CREATE request
2214  */
2215 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2216                                 const struct nfs4_create_arg *args)
2217 {
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         encode_compound_hdr(xdr, req, &hdr);
2223         encode_sequence(xdr, &args->seq_args, &hdr);
2224         encode_putfh(xdr, args->dir_fh, &hdr);
2225         encode_create(xdr, args, &hdr);
2226         encode_getfh(xdr, &hdr);
2227         encode_getfattr(xdr, args->bitmask, &hdr);
2228         encode_nops(&hdr);
2229 }
2230
2231 /*
2232  * Encode SYMLINK request
2233  */
2234 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2235                                  const struct nfs4_create_arg *args)
2236 {
2237         nfs4_xdr_enc_create(req, xdr, args);
2238 }
2239
2240 /*
2241  * Encode GETATTR request
2242  */
2243 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2244                                  const struct nfs4_getattr_arg *args)
2245 {
2246         struct compound_hdr hdr = {
2247                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248         };
2249
2250         encode_compound_hdr(xdr, req, &hdr);
2251         encode_sequence(xdr, &args->seq_args, &hdr);
2252         encode_putfh(xdr, args->fh, &hdr);
2253         encode_getfattr(xdr, args->bitmask, &hdr);
2254         encode_nops(&hdr);
2255 }
2256
2257 /*
2258  * Encode a CLOSE request
2259  */
2260 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2261                                struct nfs_closeargs *args)
2262 {
2263         struct compound_hdr hdr = {
2264                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2265         };
2266
2267         encode_compound_hdr(xdr, req, &hdr);
2268         encode_sequence(xdr, &args->seq_args, &hdr);
2269         encode_putfh(xdr, args->fh, &hdr);
2270         if (args->lr_args)
2271                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2272         if (args->bitmask != NULL)
2273                 encode_getfattr(xdr, args->bitmask, &hdr);
2274         encode_close(xdr, args, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  * Encode an OPEN request
2280  */
2281 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                               struct nfs_openargs *args)
2283 {
2284         struct compound_hdr hdr = {
2285                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286         };
2287
2288         encode_compound_hdr(xdr, req, &hdr);
2289         encode_sequence(xdr, &args->seq_args, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_open(xdr, args, &hdr);
2292         encode_getfh(xdr, &hdr);
2293         if (args->access)
2294                 encode_access(xdr, args->access, &hdr);
2295         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2296         encode_nops(&hdr);
2297 }
2298
2299 /*
2300  * Encode an OPEN_CONFIRM request
2301  */
2302 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2303                                       struct xdr_stream *xdr,
2304                                       struct nfs_open_confirmargs *args)
2305 {
2306         struct compound_hdr hdr = {
2307                 .nops   = 0,
2308         };
2309
2310         encode_compound_hdr(xdr, req, &hdr);
2311         encode_putfh(xdr, args->fh, &hdr);
2312         encode_open_confirm(xdr, args, &hdr);
2313         encode_nops(&hdr);
2314 }
2315
2316 /*
2317  * Encode an OPEN request with no attributes.
2318  */
2319 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2320                                      struct xdr_stream *xdr,
2321                                      struct nfs_openargs *args)
2322 {
2323         struct compound_hdr hdr = {
2324                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2325         };
2326
2327         encode_compound_hdr(xdr, req, &hdr);
2328         encode_sequence(xdr, &args->seq_args, &hdr);
2329         encode_putfh(xdr, args->fh, &hdr);
2330         encode_open(xdr, args, &hdr);
2331         if (args->access)
2332                 encode_access(xdr, args->access, &hdr);
2333         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2334         encode_nops(&hdr);
2335 }
2336
2337 /*
2338  * Encode an OPEN_DOWNGRADE request
2339  */
2340 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2341                                         struct xdr_stream *xdr,
2342                                         struct nfs_closeargs *args)
2343 {
2344         struct compound_hdr hdr = {
2345                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2346         };
2347
2348         encode_compound_hdr(xdr, req, &hdr);
2349         encode_sequence(xdr, &args->seq_args, &hdr);
2350         encode_putfh(xdr, args->fh, &hdr);
2351         if (args->lr_args)
2352                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2353         encode_open_downgrade(xdr, args, &hdr);
2354         encode_nops(&hdr);
2355 }
2356
2357 /*
2358  * Encode a LOCK request
2359  */
2360 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2361                               struct nfs_lock_args *args)
2362 {
2363         struct compound_hdr hdr = {
2364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365         };
2366
2367         encode_compound_hdr(xdr, req, &hdr);
2368         encode_sequence(xdr, &args->seq_args, &hdr);
2369         encode_putfh(xdr, args->fh, &hdr);
2370         encode_lock(xdr, args, &hdr);
2371         encode_nops(&hdr);
2372 }
2373
2374 /*
2375  * Encode a LOCKT request
2376  */
2377 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2378                                struct nfs_lockt_args *args)
2379 {
2380         struct compound_hdr hdr = {
2381                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2382         };
2383
2384         encode_compound_hdr(xdr, req, &hdr);
2385         encode_sequence(xdr, &args->seq_args, &hdr);
2386         encode_putfh(xdr, args->fh, &hdr);
2387         encode_lockt(xdr, args, &hdr);
2388         encode_nops(&hdr);
2389 }
2390
2391 /*
2392  * Encode a LOCKU request
2393  */
2394 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2395                                struct nfs_locku_args *args)
2396 {
2397         struct compound_hdr hdr = {
2398                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2399         };
2400
2401         encode_compound_hdr(xdr, req, &hdr);
2402         encode_sequence(xdr, &args->seq_args, &hdr);
2403         encode_putfh(xdr, args->fh, &hdr);
2404         encode_locku(xdr, args, &hdr);
2405         encode_nops(&hdr);
2406 }
2407
2408 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2409                                            struct xdr_stream *xdr,
2410                                         struct nfs_release_lockowner_args *args)
2411 {
2412         struct compound_hdr hdr = {
2413                 .minorversion = 0,
2414         };
2415
2416         encode_compound_hdr(xdr, req, &hdr);
2417         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2418         encode_nops(&hdr);
2419 }
2420
2421 /*
2422  * Encode a READLINK request
2423  */
2424 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2425                                   const struct nfs4_readlink *args)
2426 {
2427         struct compound_hdr hdr = {
2428                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429         };
2430
2431         encode_compound_hdr(xdr, req, &hdr);
2432         encode_sequence(xdr, &args->seq_args, &hdr);
2433         encode_putfh(xdr, args->fh, &hdr);
2434         encode_readlink(xdr, args, req, &hdr);
2435
2436         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2437                         args->pgbase, args->pglen);
2438         encode_nops(&hdr);
2439 }
2440
2441 /*
2442  * Encode a READDIR request
2443  */
2444 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2445                                  const struct nfs4_readdir_arg *args)
2446 {
2447         struct compound_hdr hdr = {
2448                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449         };
2450
2451         encode_compound_hdr(xdr, req, &hdr);
2452         encode_sequence(xdr, &args->seq_args, &hdr);
2453         encode_putfh(xdr, args->fh, &hdr);
2454         encode_readdir(xdr, args, req, &hdr);
2455
2456         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2457                          args->pgbase, args->count);
2458         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2459                         __func__, hdr.replen << 2, args->pages,
2460                         args->pgbase, args->count);
2461         encode_nops(&hdr);
2462 }
2463
2464 /*
2465  * Encode a READ request
2466  */
2467 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2468                               struct nfs_pgio_args *args)
2469 {
2470         struct compound_hdr hdr = {
2471                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2472         };
2473
2474         encode_compound_hdr(xdr, req, &hdr);
2475         encode_sequence(xdr, &args->seq_args, &hdr);
2476         encode_putfh(xdr, args->fh, &hdr);
2477         encode_read(xdr, args, &hdr);
2478
2479         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2480                          args->pages, args->pgbase, args->count);
2481         req->rq_rcv_buf.flags |= XDRBUF_READ;
2482         encode_nops(&hdr);
2483 }
2484
2485 /*
2486  * Encode an SETATTR request
2487  */
2488 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2489                                  struct nfs_setattrargs *args)
2490 {
2491         struct compound_hdr hdr = {
2492                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2493         };
2494
2495         encode_compound_hdr(xdr, req, &hdr);
2496         encode_sequence(xdr, &args->seq_args, &hdr);
2497         encode_putfh(xdr, args->fh, &hdr);
2498         encode_setattr(xdr, args, args->server, &hdr);
2499         encode_getfattr(xdr, args->bitmask, &hdr);
2500         encode_nops(&hdr);
2501 }
2502
2503 /*
2504  * Encode a GETACL request
2505  */
2506 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2507                                 struct nfs_getaclargs *args)
2508 {
2509         struct compound_hdr hdr = {
2510                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2511         };
2512         uint32_t replen;
2513
2514         encode_compound_hdr(xdr, req, &hdr);
2515         encode_sequence(xdr, &args->seq_args, &hdr);
2516         encode_putfh(xdr, args->fh, &hdr);
2517         replen = hdr.replen + op_decode_hdr_maxsz;
2518         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2519
2520         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2521                 args->acl_pages, 0, args->acl_len);
2522
2523         encode_nops(&hdr);
2524 }
2525
2526 /*
2527  * Encode a WRITE request
2528  */
2529 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2530                                struct nfs_pgio_args *args)
2531 {
2532         struct compound_hdr hdr = {
2533                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2534         };
2535
2536         encode_compound_hdr(xdr, req, &hdr);
2537         encode_sequence(xdr, &args->seq_args, &hdr);
2538         encode_putfh(xdr, args->fh, &hdr);
2539         encode_write(xdr, args, &hdr);
2540         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2541         if (args->bitmask)
2542                 encode_getfattr(xdr, args->bitmask, &hdr);
2543         encode_nops(&hdr);
2544 }
2545
2546 /*
2547  *  a COMMIT request
2548  */
2549 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2550                                 struct nfs_commitargs *args)
2551 {
2552         struct compound_hdr hdr = {
2553                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2554         };
2555
2556         encode_compound_hdr(xdr, req, &hdr);
2557         encode_sequence(xdr, &args->seq_args, &hdr);
2558         encode_putfh(xdr, args->fh, &hdr);
2559         encode_commit(xdr, args, &hdr);
2560         encode_nops(&hdr);
2561 }
2562
2563 /*
2564  * FSINFO request
2565  */
2566 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2567                                 struct nfs4_fsinfo_arg *args)
2568 {
2569         struct compound_hdr hdr = {
2570                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2571         };
2572
2573         encode_compound_hdr(xdr, req, &hdr);
2574         encode_sequence(xdr, &args->seq_args, &hdr);
2575         encode_putfh(xdr, args->fh, &hdr);
2576         encode_fsinfo(xdr, args->bitmask, &hdr);
2577         encode_nops(&hdr);
2578 }
2579
2580 /*
2581  * a PATHCONF request
2582  */
2583 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2584                                   const struct nfs4_pathconf_arg *args)
2585 {
2586         struct compound_hdr hdr = {
2587                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2588         };
2589
2590         encode_compound_hdr(xdr, req, &hdr);
2591         encode_sequence(xdr, &args->seq_args, &hdr);
2592         encode_putfh(xdr, args->fh, &hdr);
2593         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2594                            &hdr);
2595         encode_nops(&hdr);
2596 }
2597
2598 /*
2599  * a STATFS request
2600  */
2601 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2602                                 const struct nfs4_statfs_arg *args)
2603 {
2604         struct compound_hdr hdr = {
2605                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606         };
2607
2608         encode_compound_hdr(xdr, req, &hdr);
2609         encode_sequence(xdr, &args->seq_args, &hdr);
2610         encode_putfh(xdr, args->fh, &hdr);
2611         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2612                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2613         encode_nops(&hdr);
2614 }
2615
2616 /*
2617  * GETATTR_BITMAP request
2618  */
2619 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2620                                      struct xdr_stream *xdr,
2621                                      struct nfs4_server_caps_arg *args)
2622 {
2623         const u32 *bitmask = args->bitmask;
2624         struct compound_hdr hdr = {
2625                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2626         };
2627
2628         encode_compound_hdr(xdr, req, &hdr);
2629         encode_sequence(xdr, &args->seq_args, &hdr);
2630         encode_putfh(xdr, args->fhandle, &hdr);
2631         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2632         encode_nops(&hdr);
2633 }
2634
2635 /*
2636  * a RENEW request
2637  */
2638 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2639                                struct nfs_client *clp)
2640 {
2641         struct compound_hdr hdr = {
2642                 .nops   = 0,
2643         };
2644
2645         encode_compound_hdr(xdr, req, &hdr);
2646         encode_renew(xdr, clp->cl_clientid, &hdr);
2647         encode_nops(&hdr);
2648 }
2649
2650 /*
2651  * a SETCLIENTID request
2652  */
2653 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2654                                      struct xdr_stream *xdr,
2655                                      struct nfs4_setclientid *sc)
2656 {
2657         struct compound_hdr hdr = {
2658                 .nops   = 0,
2659         };
2660
2661         encode_compound_hdr(xdr, req, &hdr);
2662         encode_setclientid(xdr, sc, &hdr);
2663         encode_nops(&hdr);
2664 }
2665
2666 /*
2667  * a SETCLIENTID_CONFIRM request
2668  */
2669 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2670                                              struct xdr_stream *xdr,
2671                                              struct nfs4_setclientid_res *arg)
2672 {
2673         struct compound_hdr hdr = {
2674                 .nops   = 0,
2675         };
2676
2677         encode_compound_hdr(xdr, req, &hdr);
2678         encode_setclientid_confirm(xdr, arg, &hdr);
2679         encode_nops(&hdr);
2680 }
2681
2682 /*
2683  * DELEGRETURN request
2684  */
2685 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2686                                      struct xdr_stream *xdr,
2687                                      const struct nfs4_delegreturnargs *args)
2688 {
2689         struct compound_hdr hdr = {
2690                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2691         };
2692
2693         encode_compound_hdr(xdr, req, &hdr);
2694         encode_sequence(xdr, &args->seq_args, &hdr);
2695         encode_putfh(xdr, args->fhandle, &hdr);
2696         if (args->lr_args)
2697                 encode_layoutreturn(xdr, args->lr_args, &hdr);
2698         if (args->bitmask)
2699                 encode_getfattr(xdr, args->bitmask, &hdr);
2700         encode_delegreturn(xdr, args->stateid, &hdr);
2701         encode_nops(&hdr);
2702 }
2703
2704 /*
2705  * Encode FS_LOCATIONS request
2706  */
2707 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2708                                       struct xdr_stream *xdr,
2709                                       struct nfs4_fs_locations_arg *args)
2710 {
2711         struct compound_hdr hdr = {
2712                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713         };
2714         uint32_t replen;
2715
2716         encode_compound_hdr(xdr, req, &hdr);
2717         encode_sequence(xdr, &args->seq_args, &hdr);
2718         if (args->migration) {
2719                 encode_putfh(xdr, args->fh, &hdr);
2720                 replen = hdr.replen;
2721                 encode_fs_locations(xdr, args->bitmask, &hdr);
2722                 if (args->renew)
2723                         encode_renew(xdr, args->clientid, &hdr);
2724         } else {
2725                 encode_putfh(xdr, args->dir_fh, &hdr);
2726                 encode_lookup(xdr, args->name, &hdr);
2727                 replen = hdr.replen;
2728                 encode_fs_locations(xdr, args->bitmask, &hdr);
2729         }
2730
2731         /* Set up reply kvec to capture returned fs_locations array. */
2732         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2733                         0, PAGE_SIZE);
2734         encode_nops(&hdr);
2735 }
2736
2737 /*
2738  * Encode SECINFO request
2739  */
2740 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2741                                 struct xdr_stream *xdr,
2742                                 struct nfs4_secinfo_arg *args)
2743 {
2744         struct compound_hdr hdr = {
2745                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2746         };
2747
2748         encode_compound_hdr(xdr, req, &hdr);
2749         encode_sequence(xdr, &args->seq_args, &hdr);
2750         encode_putfh(xdr, args->dir_fh, &hdr);
2751         encode_secinfo(xdr, args->name, &hdr);
2752         encode_nops(&hdr);
2753 }
2754
2755 /*
2756  * Encode FSID_PRESENT request
2757  */
2758 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2759                                       struct xdr_stream *xdr,
2760                                       struct nfs4_fsid_present_arg *args)
2761 {
2762         struct compound_hdr hdr = {
2763                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2764         };
2765
2766         encode_compound_hdr(xdr, req, &hdr);
2767         encode_sequence(xdr, &args->seq_args, &hdr);
2768         encode_putfh(xdr, args->fh, &hdr);
2769         encode_getfh(xdr, &hdr);
2770         if (args->renew)
2771                 encode_renew(xdr, args->clientid, &hdr);
2772         encode_nops(&hdr);
2773 }
2774
2775 #if defined(CONFIG_NFS_V4_1)
2776 /*
2777  * BIND_CONN_TO_SESSION request
2778  */
2779 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2780                                 struct xdr_stream *xdr,
2781                                 struct nfs41_bind_conn_to_session_args *args)
2782 {
2783         struct compound_hdr hdr = {
2784                 .minorversion = args->client->cl_mvops->minor_version,
2785         };
2786
2787         encode_compound_hdr(xdr, req, &hdr);
2788         encode_bind_conn_to_session(xdr, args, &hdr);
2789         encode_nops(&hdr);
2790 }
2791
2792 /*
2793  * EXCHANGE_ID request
2794  */
2795 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2796                                      struct xdr_stream *xdr,
2797                                      struct nfs41_exchange_id_args *args)
2798 {
2799         struct compound_hdr hdr = {
2800                 .minorversion = args->client->cl_mvops->minor_version,
2801         };
2802
2803         encode_compound_hdr(xdr, req, &hdr);
2804         encode_exchange_id(xdr, args, &hdr);
2805         encode_nops(&hdr);
2806 }
2807
2808 /*
2809  * a CREATE_SESSION request
2810  */
2811 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2812                                         struct xdr_stream *xdr,
2813                                         struct nfs41_create_session_args *args)
2814 {
2815         struct compound_hdr hdr = {
2816                 .minorversion = args->client->cl_mvops->minor_version,
2817         };
2818
2819         encode_compound_hdr(xdr, req, &hdr);
2820         encode_create_session(xdr, args, &hdr);
2821         encode_nops(&hdr);
2822 }
2823
2824 /*
2825  * a DESTROY_SESSION request
2826  */
2827 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2828                                          struct xdr_stream *xdr,
2829                                          struct nfs4_session *session)
2830 {
2831         struct compound_hdr hdr = {
2832                 .minorversion = session->clp->cl_mvops->minor_version,
2833         };
2834
2835         encode_compound_hdr(xdr, req, &hdr);
2836         encode_destroy_session(xdr, session, &hdr);
2837         encode_nops(&hdr);
2838 }
2839
2840 /*
2841  * a DESTROY_CLIENTID request
2842  */
2843 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2844                                          struct xdr_stream *xdr,
2845                                          struct nfs_client *clp)
2846 {
2847         struct compound_hdr hdr = {
2848                 .minorversion = clp->cl_mvops->minor_version,
2849         };
2850
2851         encode_compound_hdr(xdr, req, &hdr);
2852         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2853         encode_nops(&hdr);
2854 }
2855
2856 /*
2857  * a SEQUENCE request
2858  */
2859 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2860                                   struct nfs4_sequence_args *args)
2861 {
2862         struct compound_hdr hdr = {
2863                 .minorversion = nfs4_xdr_minorversion(args),
2864         };
2865
2866         encode_compound_hdr(xdr, req, &hdr);
2867         encode_sequence(xdr, args, &hdr);
2868         encode_nops(&hdr);
2869 }
2870
2871 /*
2872  * a GET_LEASE_TIME request
2873  */
2874 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2875                                         struct xdr_stream *xdr,
2876                                         struct nfs4_get_lease_time_args *args)
2877 {
2878         struct compound_hdr hdr = {
2879                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2880         };
2881         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2882
2883         encode_compound_hdr(xdr, req, &hdr);
2884         encode_sequence(xdr, &args->la_seq_args, &hdr);
2885         encode_putrootfh(xdr, &hdr);
2886         encode_fsinfo(xdr, lease_bitmap, &hdr);
2887         encode_nops(&hdr);
2888 }
2889
2890 /*
2891  * a RECLAIM_COMPLETE request
2892  */
2893 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2894                                           struct xdr_stream *xdr,
2895                                 struct nfs41_reclaim_complete_args *args)
2896 {
2897         struct compound_hdr hdr = {
2898                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2899         };
2900
2901         encode_compound_hdr(xdr, req, &hdr);
2902         encode_sequence(xdr, &args->seq_args, &hdr);
2903         encode_reclaim_complete(xdr, args, &hdr);
2904         encode_nops(&hdr);
2905 }
2906
2907 /*
2908  * Encode GETDEVICEINFO request
2909  */
2910 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2911                                        struct xdr_stream *xdr,
2912                                        struct nfs4_getdeviceinfo_args *args)
2913 {
2914         struct compound_hdr hdr = {
2915                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2916         };
2917
2918         encode_compound_hdr(xdr, req, &hdr);
2919         encode_sequence(xdr, &args->seq_args, &hdr);
2920         encode_getdeviceinfo(xdr, args, &hdr);
2921
2922         /* set up reply kvec. Subtract notification bitmap max size (2)
2923          * so that notification bitmap is put in xdr_buf tail */
2924         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2925                          args->pdev->pages, args->pdev->pgbase,
2926                          args->pdev->pglen);
2927
2928         encode_nops(&hdr);
2929 }
2930
2931 /*
2932  *  Encode LAYOUTGET request
2933  */
2934 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2935                                    struct xdr_stream *xdr,
2936                                    struct nfs4_layoutget_args *args)
2937 {
2938         struct compound_hdr hdr = {
2939                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2940         };
2941
2942         encode_compound_hdr(xdr, req, &hdr);
2943         encode_sequence(xdr, &args->seq_args, &hdr);
2944         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2945         encode_layoutget(xdr, args, &hdr);
2946
2947         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2948             args->layout.pages, 0, args->layout.pglen);
2949
2950         encode_nops(&hdr);
2951 }
2952
2953 /*
2954  *  Encode LAYOUTCOMMIT request
2955  */
2956 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2957                                       struct xdr_stream *xdr,
2958                                       struct nfs4_layoutcommit_args *args)
2959 {
2960         struct nfs4_layoutcommit_data *data =
2961                 container_of(args, struct nfs4_layoutcommit_data, args);
2962         struct compound_hdr hdr = {
2963                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2964         };
2965
2966         encode_compound_hdr(xdr, req, &hdr);
2967         encode_sequence(xdr, &args->seq_args, &hdr);
2968         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2969         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2970         encode_getfattr(xdr, args->bitmask, &hdr);
2971         encode_nops(&hdr);
2972 }
2973
2974 /*
2975  * Encode LAYOUTRETURN request
2976  */
2977 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2978                                       struct xdr_stream *xdr,
2979                                       struct nfs4_layoutreturn_args *args)
2980 {
2981         struct compound_hdr hdr = {
2982                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2983         };
2984
2985         encode_compound_hdr(xdr, req, &hdr);
2986         encode_sequence(xdr, &args->seq_args, &hdr);
2987         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2988         encode_layoutreturn(xdr, args, &hdr);
2989         encode_nops(&hdr);
2990 }
2991
2992 /*
2993  * Encode SECINFO_NO_NAME request
2994  */
2995 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2996                                         struct xdr_stream *xdr,
2997                                         struct nfs41_secinfo_no_name_args *args)
2998 {
2999         struct compound_hdr hdr = {
3000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3001         };
3002
3003         encode_compound_hdr(xdr, req, &hdr);
3004         encode_sequence(xdr, &args->seq_args, &hdr);
3005         encode_putrootfh(xdr, &hdr);
3006         encode_secinfo_no_name(xdr, args, &hdr);
3007         encode_nops(&hdr);
3008         return 0;
3009 }
3010
3011 /*
3012  *  Encode TEST_STATEID request
3013  */
3014 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3015                                       struct xdr_stream *xdr,
3016                                       struct nfs41_test_stateid_args *args)
3017 {
3018         struct compound_hdr hdr = {
3019                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3020         };
3021
3022         encode_compound_hdr(xdr, req, &hdr);
3023         encode_sequence(xdr, &args->seq_args, &hdr);
3024         encode_test_stateid(xdr, args, &hdr);
3025         encode_nops(&hdr);
3026 }
3027
3028 /*
3029  *  Encode FREE_STATEID request
3030  */
3031 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3032                                      struct xdr_stream *xdr,
3033                                      struct nfs41_free_stateid_args *args)
3034 {
3035         struct compound_hdr hdr = {
3036                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037         };
3038
3039         encode_compound_hdr(xdr, req, &hdr);
3040         encode_sequence(xdr, &args->seq_args, &hdr);
3041         encode_free_stateid(xdr, args, &hdr);
3042         encode_nops(&hdr);
3043 }
3044 #endif /* CONFIG_NFS_V4_1 */
3045
3046 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3047 {
3048         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3049                 "Remaining buffer length is %tu words.\n",
3050                 func, xdr->end - xdr->p);
3051 }
3052
3053 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3054 {
3055         ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3056                         NFS4_OPAQUE_LIMIT);
3057         if (unlikely(ret < 0)) {
3058                 if (ret == -EBADMSG)
3059                         print_overflow_msg(__func__, xdr);
3060                 return -EIO;
3061         }
3062         *len = ret;
3063         return 0;
3064 }
3065
3066 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3067 {
3068         __be32 *p;
3069
3070         p = xdr_inline_decode(xdr, 8);
3071         if (unlikely(!p))
3072                 goto out_overflow;
3073         hdr->status = be32_to_cpup(p++);
3074         hdr->taglen = be32_to_cpup(p);
3075
3076         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3077         if (unlikely(!p))
3078                 goto out_overflow;
3079         hdr->tag = (char *)p;
3080         p += XDR_QUADLEN(hdr->taglen);
3081         hdr->nops = be32_to_cpup(p);
3082         if (unlikely(hdr->nops < 1))
3083                 return nfs4_stat_to_errno(hdr->status);
3084         return 0;
3085 out_overflow:
3086         print_overflow_msg(__func__, xdr);
3087         return -EIO;
3088 }
3089
3090 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3091                 int *nfs_retval)
3092 {
3093         __be32 *p;
3094         uint32_t opnum;
3095         int32_t nfserr;
3096
3097         p = xdr_inline_decode(xdr, 8);
3098         if (unlikely(!p))
3099                 goto out_overflow;
3100         opnum = be32_to_cpup(p++);
3101         if (unlikely(opnum != expected))
3102                 goto out_bad_operation;
3103         nfserr = be32_to_cpup(p);
3104         if (nfserr == NFS_OK)
3105                 *nfs_retval = 0;
3106         else
3107                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3108         return true;
3109 out_bad_operation:
3110         dprintk("nfs: Server returned operation"
3111                 " %d but we issued a request for %d\n",
3112                         opnum, expected);
3113         *nfs_retval = -EREMOTEIO;
3114         return false;
3115 out_overflow:
3116         print_overflow_msg(__func__, xdr);
3117         *nfs_retval = -EIO;
3118         return false;
3119 }
3120
3121 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3122 {
3123         int retval;
3124
3125         __decode_op_hdr(xdr, expected, &retval);
3126         return retval;
3127 }
3128
3129 /* Dummy routine */
3130 static int decode_ace(struct xdr_stream *xdr, void *ace)
3131 {
3132         __be32 *p;
3133         unsigned int strlen;
3134         char *str;
3135
3136         p = xdr_inline_decode(xdr, 12);
3137         if (likely(p))
3138                 return decode_opaque_inline(xdr, &strlen, &str);
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3144 {
3145         uint32_t bmlen;
3146         __be32 *p;
3147
3148         p = xdr_inline_decode(xdr, 4);
3149         if (unlikely(!p))
3150                 goto out_overflow;
3151         bmlen = be32_to_cpup(p);
3152
3153         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3154         p = xdr_inline_decode(xdr, (bmlen << 2));
3155         if (unlikely(!p))
3156                 goto out_overflow;
3157         if (bmlen > 0) {
3158                 bitmap[0] = be32_to_cpup(p++);
3159                 if (bmlen > 1) {
3160                         bitmap[1] = be32_to_cpup(p++);
3161                         if (bmlen > 2)
3162                                 bitmap[2] = be32_to_cpup(p);
3163                 }
3164         }
3165         return 0;
3166 out_overflow:
3167         print_overflow_msg(__func__, xdr);
3168         return -EIO;
3169 }
3170
3171 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3172 {
3173         __be32 *p;
3174
3175         p = xdr_inline_decode(xdr, 4);
3176         if (unlikely(!p))
3177                 goto out_overflow;
3178         *attrlen = be32_to_cpup(p);
3179         *savep = xdr_stream_pos(xdr);
3180         return 0;
3181 out_overflow:
3182         print_overflow_msg(__func__, xdr);
3183         return -EIO;
3184 }
3185
3186 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3187 {
3188         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3189                 int ret;
3190                 ret = decode_attr_bitmap(xdr, bitmask);
3191                 if (unlikely(ret < 0))
3192                         return ret;
3193                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3194         } else
3195                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3196         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3197                 bitmask[0], bitmask[1], bitmask[2]);
3198         return 0;
3199 }
3200
3201 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3202 {
3203         __be32 *p;
3204         int ret = 0;
3205
3206         *type = 0;
3207         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3208                 return -EIO;
3209         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3210                 p = xdr_inline_decode(xdr, 4);
3211                 if (unlikely(!p))
3212                         goto out_overflow;
3213                 *type = be32_to_cpup(p);
3214                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3215                         dprintk("%s: bad type %d\n", __func__, *type);
3216                         return -EIO;
3217                 }
3218                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3219                 ret = NFS_ATTR_FATTR_TYPE;
3220         }
3221         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3222         return ret;
3223 out_overflow:
3224         print_overflow_msg(__func__, xdr);
3225         return -EIO;
3226 }
3227
3228 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3229                                       uint32_t *bitmap, uint32_t *type)
3230 {
3231         __be32 *p;
3232
3233         *type = 0;
3234         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3235                 return -EIO;
3236         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3237                 p = xdr_inline_decode(xdr, 4);
3238                 if (unlikely(!p))
3239                         goto out_overflow;
3240                 *type = be32_to_cpup(p);
3241                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3242         }
3243         dprintk("%s: expire type=0x%x\n", __func__, *type);
3244         return 0;
3245 out_overflow:
3246         print_overflow_msg(__func__, xdr);
3247         return -EIO;
3248 }
3249
3250 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3251 {
3252         __be32 *p;
3253         int ret = 0;
3254
3255         *change = 0;
3256         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3259                 p = xdr_inline_decode(xdr, 8);
3260                 if (unlikely(!p))
3261                         goto out_overflow;
3262                 xdr_decode_hyper(p, change);
3263                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3264                 ret = NFS_ATTR_FATTR_CHANGE;
3265         }
3266         dprintk("%s: change attribute=%Lu\n", __func__,
3267                         (unsigned long long)*change);
3268         return ret;
3269 out_overflow:
3270         print_overflow_msg(__func__, xdr);
3271         return -EIO;
3272 }
3273
3274 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3275 {
3276         __be32 *p;
3277         int ret = 0;
3278
3279         *size = 0;
3280         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3281                 return -EIO;
3282         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3283                 p = xdr_inline_decode(xdr, 8);
3284                 if (unlikely(!p))
3285                         goto out_overflow;
3286                 xdr_decode_hyper(p, size);
3287                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3288                 ret = NFS_ATTR_FATTR_SIZE;
3289         }
3290         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3291         return ret;
3292 out_overflow:
3293         print_overflow_msg(__func__, xdr);
3294         return -EIO;
3295 }
3296
3297 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3298 {
3299         __be32 *p;
3300
3301         *res = 0;
3302         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3303                 return -EIO;
3304         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3305                 p = xdr_inline_decode(xdr, 4);
3306                 if (unlikely(!p))
3307                         goto out_overflow;
3308                 *res = be32_to_cpup(p);
3309                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3310         }
3311         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3312         return 0;
3313 out_overflow:
3314         print_overflow_msg(__func__, xdr);
3315         return -EIO;
3316 }
3317
3318 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3319 {
3320         __be32 *p;
3321
3322         *res = 0;
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 *res = be32_to_cpup(p);
3330                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3331         }
3332         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3333         return 0;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3340 {
3341         __be32 *p;
3342         int ret = 0;
3343
3344         fsid->major = 0;
3345         fsid->minor = 0;
3346         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3347                 return -EIO;
3348         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3349                 p = xdr_inline_decode(xdr, 16);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 p = xdr_decode_hyper(p, &fsid->major);
3353                 xdr_decode_hyper(p, &fsid->minor);
3354                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3355                 ret = NFS_ATTR_FATTR_FSID;
3356         }
3357         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3358                         (unsigned long long)fsid->major,
3359                         (unsigned long long)fsid->minor);
3360         return ret;
3361 out_overflow:
3362         print_overflow_msg(__func__, xdr);
3363         return -EIO;
3364 }
3365
3366 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3367 {
3368         __be32 *p;
3369
3370         *res = 60;
3371         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3374                 p = xdr_inline_decode(xdr, 4);
3375                 if (unlikely(!p))
3376                         goto out_overflow;
3377                 *res = be32_to_cpup(p);
3378                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3379         }
3380         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3381         return 0;
3382 out_overflow:
3383         print_overflow_msg(__func__, xdr);
3384         return -EIO;
3385 }
3386
3387 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3388 {
3389         __be32 *p;
3390
3391         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3392                 return -EIO;
3393         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3394                 p = xdr_inline_decode(xdr, 4);
3395                 if (unlikely(!p))
3396                         goto out_overflow;
3397                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3398                 *res = -be32_to_cpup(p);
3399         }
3400         return 0;
3401 out_overflow:
3402         print_overflow_msg(__func__, xdr);
3403         return -EIO;
3404 }
3405
3406 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3407                                  uint32_t *bitmap, uint32_t *bitmask)
3408 {
3409         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3410                 int ret;
3411                 ret = decode_attr_bitmap(xdr, bitmask);
3412                 if (unlikely(ret < 0))
3413                         return ret;
3414                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3415         } else
3416                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3417         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3418                 bitmask[0], bitmask[1], bitmask[2]);
3419         return 0;
3420 }
3421
3422 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3423 {
3424         __be32 *p;
3425         int len;
3426
3427         if (fh != NULL)
3428                 memset(fh, 0, sizeof(*fh));
3429
3430         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3431                 return -EIO;
3432         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3433                 p = xdr_inline_decode(xdr, 4);
3434                 if (unlikely(!p))
3435                         goto out_overflow;
3436                 len = be32_to_cpup(p);
3437                 if (len > NFS4_FHSIZE)
3438                         return -EIO;
3439                 p = xdr_inline_decode(xdr, len);
3440                 if (unlikely(!p))
3441                         goto out_overflow;
3442                 if (fh != NULL) {
3443                         memcpy(fh->data, p, len);
3444                         fh->size = len;
3445                 }
3446                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3447         }
3448         return 0;
3449 out_overflow:
3450         print_overflow_msg(__func__, xdr);
3451         return -EIO;
3452 }
3453
3454 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3455 {
3456         __be32 *p;
3457
3458         *res = 0;
3459         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3460                 return -EIO;
3461         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3462                 p = xdr_inline_decode(xdr, 4);
3463                 if (unlikely(!p))
3464                         goto out_overflow;
3465                 *res = be32_to_cpup(p);
3466                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3467         }
3468         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3469         return 0;
3470 out_overflow:
3471         print_overflow_msg(__func__, xdr);
3472         return -EIO;
3473 }
3474
3475 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3476 {
3477         __be32 *p;
3478         int ret = 0;
3479
3480         *fileid = 0;
3481         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3482                 return -EIO;
3483         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3484                 p = xdr_inline_decode(xdr, 8);
3485                 if (unlikely(!p))
3486                         goto out_overflow;
3487                 xdr_decode_hyper(p, fileid);
3488                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3489                 ret = NFS_ATTR_FATTR_FILEID;
3490         }
3491         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3492         return ret;
3493 out_overflow:
3494         print_overflow_msg(__func__, xdr);
3495         return -EIO;
3496 }
3497
3498 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3499 {
3500         __be32 *p;
3501         int ret = 0;
3502
3503         *fileid = 0;
3504         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3505                 return -EIO;
3506         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3507                 p = xdr_inline_decode(xdr, 8);
3508                 if (unlikely(!p))
3509                         goto out_overflow;
3510                 xdr_decode_hyper(p, fileid);
3511                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3512                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3513         }
3514         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3515         return ret;
3516 out_overflow:
3517         print_overflow_msg(__func__, xdr);
3518         return -EIO;
3519 }
3520
3521 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3522 {
3523         __be32 *p;
3524         int status = 0;
3525
3526         *res = 0;
3527         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3528                 return -EIO;
3529         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3530                 p = xdr_inline_decode(xdr, 8);
3531                 if (unlikely(!p))
3532                         goto out_overflow;
3533                 xdr_decode_hyper(p, res);
3534                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3535         }
3536         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3537         return status;
3538 out_overflow:
3539         print_overflow_msg(__func__, xdr);
3540         return -EIO;
3541 }
3542
3543 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3544 {
3545         __be32 *p;
3546         int status = 0;
3547
3548         *res = 0;
3549         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3550                 return -EIO;
3551         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3552                 p = xdr_inline_decode(xdr, 8);
3553                 if (unlikely(!p))
3554                         goto out_overflow;
3555                 xdr_decode_hyper(p, res);
3556                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3557         }
3558         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3559         return status;
3560 out_overflow:
3561         print_overflow_msg(__func__, xdr);
3562         return -EIO;
3563 }
3564
3565 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3566 {
3567         __be32 *p;
3568         int status = 0;
3569
3570         *res = 0;
3571         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3572                 return -EIO;
3573         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3574                 p = xdr_inline_decode(xdr, 8);
3575                 if (unlikely(!p))
3576                         goto out_overflow;
3577                 xdr_decode_hyper(p, res);
3578                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3579         }
3580         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3581         return status;
3582 out_overflow:
3583         print_overflow_msg(__func__, xdr);
3584         return -EIO;
3585 }
3586
3587 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3588 {
3589         u32 n;
3590         __be32 *p;
3591         int status = 0;
3592
3593         p = xdr_inline_decode(xdr, 4);
3594         if (unlikely(!p))
3595                 goto out_overflow;
3596         n = be32_to_cpup(p);
3597         if (n == 0)
3598                 goto root_path;
3599         dprintk("pathname4: ");
3600         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3601                 dprintk("cannot parse %d components in path\n", n);
3602                 goto out_eio;
3603         }
3604         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3605                 struct nfs4_string *component = &path->components[path->ncomponents];
3606                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3607                 if (unlikely(status != 0))
3608                         goto out_eio;
3609                 ifdebug (XDR)
3610                         pr_cont("%s%.*s ",
3611                                 (path->ncomponents != n ? "/ " : ""),
3612                                 component->len, component->data);
3613         }
3614 out:
3615         return status;
3616 root_path:
3617 /* a root pathname is sent as a zero component4 */
3618         path->ncomponents = 1;
3619         path->components[0].len=0;
3620         path->components[0].data=NULL;
3621         dprintk("pathname4: /\n");
3622         goto out;
3623 out_eio:
3624         dprintk(" status %d", status);
3625         status = -EIO;
3626         goto out;
3627 out_overflow:
3628         print_overflow_msg(__func__, xdr);
3629         return -EIO;
3630 }
3631
3632 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3633 {
3634         int n;
3635         __be32 *p;
3636         int status = -EIO;
3637
3638         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3639                 goto out;
3640         status = 0;
3641         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3642                 goto out;
3643         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3644         status = -EIO;
3645         /* Ignore borken servers that return unrequested attrs */
3646         if (unlikely(res == NULL))
3647                 goto out;
3648         dprintk("%s: fsroot:\n", __func__);
3649         status = decode_pathname(xdr, &res->fs_path);
3650         if (unlikely(status != 0))
3651                 goto out;
3652         p = xdr_inline_decode(xdr, 4);
3653         if (unlikely(!p))
3654                 goto out_overflow;
3655         n = be32_to_cpup(p);
3656         if (n <= 0)
3657                 goto out_eio;
3658         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3659                 u32 m;
3660                 struct nfs4_fs_location *loc;
3661
3662                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3663                         break;
3664                 loc = &res->locations[res->nlocations];
3665                 p = xdr_inline_decode(xdr, 4);
3666                 if (unlikely(!p))
3667                         goto out_overflow;
3668                 m = be32_to_cpup(p);
3669
3670                 dprintk("%s: servers:\n", __func__);
3671                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3672                         struct nfs4_string *server;
3673
3674                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3675                                 unsigned int i;
3676                                 dprintk("%s: using first %u of %u servers "
3677                                         "returned for location %u\n",
3678                                                 __func__,
3679                                                 NFS4_FS_LOCATION_MAXSERVERS,
3680                                                 m, res->nlocations);
3681                                 for (i = loc->nservers; i < m; i++) {
3682                                         unsigned int len;
3683                                         char *data;
3684                                         status = decode_opaque_inline(xdr, &len, &data);
3685                                         if (unlikely(status != 0))
3686                                                 goto out_eio;
3687                                 }
3688                                 break;
3689                         }
3690                         server = &loc->servers[loc->nservers];
3691                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3692                         if (unlikely(status != 0))
3693                                 goto out_eio;
3694                         dprintk("%s ", server->data);
3695                 }
3696                 status = decode_pathname(xdr, &loc->rootpath);
3697                 if (unlikely(status != 0))
3698                         goto out_eio;
3699         }
3700         if (res->nlocations != 0)
3701                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3702 out:
3703         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3704         return status;
3705 out_overflow:
3706         print_overflow_msg(__func__, xdr);
3707 out_eio:
3708         status = -EIO;
3709         goto out;
3710 }
3711
3712 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3713 {
3714         __be32 *p;
3715         int status = 0;
3716
3717         *res = 0;
3718         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3719                 return -EIO;
3720         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3721                 p = xdr_inline_decode(xdr, 8);
3722                 if (unlikely(!p))
3723                         goto out_overflow;
3724                 xdr_decode_hyper(p, res);
3725                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3726         }
3727         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3728         return status;
3729 out_overflow:
3730         print_overflow_msg(__func__, xdr);
3731         return -EIO;
3732 }
3733
3734 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3735 {
3736         __be32 *p;
3737         int status = 0;
3738
3739         *maxlink = 1;
3740         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3741                 return -EIO;
3742         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3743                 p = xdr_inline_decode(xdr, 4);
3744                 if (unlikely(!p))
3745                         goto out_overflow;
3746                 *maxlink = be32_to_cpup(p);
3747                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3748         }
3749         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3750         return status;
3751 out_overflow:
3752         print_overflow_msg(__func__, xdr);
3753         return -EIO;
3754 }
3755
3756 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3757 {
3758         __be32 *p;
3759         int status = 0;
3760
3761         *maxname = 1024;
3762         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3763                 return -EIO;
3764         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3765                 p = xdr_inline_decode(xdr, 4);
3766                 if (unlikely(!p))
3767                         goto out_overflow;
3768                 *maxname = be32_to_cpup(p);
3769                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3770         }
3771         dprintk("%s: maxname=%u\n", __func__, *maxname);
3772         return status;
3773 out_overflow:
3774         print_overflow_msg(__func__, xdr);
3775         return -EIO;
3776 }
3777
3778 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3779 {
3780         __be32 *p;
3781         int status = 0;
3782
3783         *res = 1024;
3784         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3785                 return -EIO;
3786         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3787                 uint64_t maxread;
3788                 p = xdr_inline_decode(xdr, 8);
3789                 if (unlikely(!p))
3790                         goto out_overflow;
3791                 xdr_decode_hyper(p, &maxread);
3792                 if (maxread > 0x7FFFFFFF)
3793                         maxread = 0x7FFFFFFF;
3794                 *res = (uint32_t)maxread;
3795                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3796         }
3797         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3798         return status;
3799 out_overflow:
3800         print_overflow_msg(__func__, xdr);
3801         return -EIO;
3802 }
3803
3804 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3805 {
3806         __be32 *p;
3807         int status = 0;
3808
3809         *res = 1024;
3810         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3811                 return -EIO;
3812         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3813                 uint64_t maxwrite;
3814                 p = xdr_inline_decode(xdr, 8);
3815                 if (unlikely(!p))
3816                         goto out_overflow;
3817                 xdr_decode_hyper(p, &maxwrite);
3818                 if (maxwrite > 0x7FFFFFFF)
3819                         maxwrite = 0x7FFFFFFF;
3820                 *res = (uint32_t)maxwrite;
3821                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3822         }
3823         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3824         return status;
3825 out_overflow:
3826         print_overflow_msg(__func__, xdr);
3827         return -EIO;
3828 }
3829
3830 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3831 {
3832         uint32_t tmp;
3833         __be32 *p;
3834         int ret = 0;
3835
3836         *mode = 0;
3837         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3838                 return -EIO;
3839         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3840                 p = xdr_inline_decode(xdr, 4);
3841                 if (unlikely(!p))
3842                         goto out_overflow;
3843                 tmp = be32_to_cpup(p);
3844                 *mode = tmp & ~S_IFMT;
3845                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3846                 ret = NFS_ATTR_FATTR_MODE;
3847         }
3848         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3849         return ret;
3850 out_overflow:
3851         print_overflow_msg(__func__, xdr);
3852         return -EIO;
3853 }
3854
3855 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3856 {
3857         __be32 *p;
3858         int ret = 0;
3859
3860         *nlink = 1;
3861         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3862                 return -EIO;
3863         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3864                 p = xdr_inline_decode(xdr, 4);
3865                 if (unlikely(!p))
3866                         goto out_overflow;
3867                 *nlink = be32_to_cpup(p);
3868                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3869                 ret = NFS_ATTR_FATTR_NLINK;
3870         }
3871         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3872         return ret;
3873 out_overflow:
3874         print_overflow_msg(__func__, xdr);
3875         return -EIO;
3876 }
3877
3878 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3879                 struct nfs4_string *name, gfp_t gfp_flags)
3880 {
3881         ssize_t ret;
3882
3883         ret = xdr_stream_decode_string_dup(xdr, &name->data,
3884                         XDR_MAX_NETOBJ, gfp_flags);
3885         name->len = 0;
3886         if (ret > 0)
3887                 name->len = ret;
3888         return ret;
3889 }
3890
3891 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3892                 const struct nfs_server *server, kuid_t *uid,
3893                 struct nfs4_string *owner_name)
3894 {
3895         ssize_t len;
3896         char *p;
3897
3898         *uid = make_kuid(&init_user_ns, -2);
3899         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3900                 return -EIO;
3901         if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3902                 return 0;
3903         bitmap[1] &= ~FATTR4_WORD1_OWNER;
3904
3905         if (owner_name != NULL) {
3906                 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3907                 if (len <= 0)
3908                         goto out;
3909                 dprintk("%s: name=%s\n", __func__, owner_name->data);
3910                 return NFS_ATTR_FATTR_OWNER_NAME;
3911         } else {
3912                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3913                                 XDR_MAX_NETOBJ);
3914                 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3915                         goto out;
3916                 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917                 return NFS_ATTR_FATTR_OWNER;
3918         }
3919 out:
3920         if (len != -EBADMSG)
3921                 return 0;
3922         print_overflow_msg(__func__, xdr);
3923         return -EIO;
3924 }
3925
3926 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3927                 const struct nfs_server *server, kgid_t *gid,
3928                 struct nfs4_string *group_name)
3929 {
3930         ssize_t len;
3931         char *p;
3932
3933         *gid = make_kgid(&init_user_ns, -2);
3934         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3935                 return -EIO;
3936         if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3937                 return 0;
3938         bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3939
3940         if (group_name != NULL) {
3941                 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
3942                 if (len <= 0)
3943                         goto out;
3944                 dprintk("%s: name=%s\n", __func__, group_name->data);
3945                 return NFS_ATTR_FATTR_GROUP_NAME;
3946         } else {
3947                 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3948                                 XDR_MAX_NETOBJ);
3949                 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3950                         goto out;
3951                 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3952                 return NFS_ATTR_FATTR_GROUP;
3953         }
3954 out:
3955         if (len != -EBADMSG)
3956                 return 0;
3957         print_overflow_msg(__func__, xdr);
3958         return -EIO;
3959 }
3960
3961 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3962 {
3963         uint32_t major = 0, minor = 0;
3964         __be32 *p;
3965         int ret = 0;
3966
3967         *rdev = MKDEV(0,0);
3968         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3969                 return -EIO;
3970         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3971                 dev_t tmp;
3972
3973                 p = xdr_inline_decode(xdr, 8);
3974                 if (unlikely(!p))
3975                         goto out_overflow;
3976                 major = be32_to_cpup(p++);
3977                 minor = be32_to_cpup(p);
3978                 tmp = MKDEV(major, minor);
3979                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3980                         *rdev = tmp;
3981                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3982                 ret = NFS_ATTR_FATTR_RDEV;
3983         }
3984         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3985         return ret;
3986 out_overflow:
3987         print_overflow_msg(__func__, xdr);
3988         return -EIO;
3989 }
3990
3991 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3992 {
3993         __be32 *p;
3994         int status = 0;
3995
3996         *res = 0;
3997         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3998                 return -EIO;
3999         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4000                 p = xdr_inline_decode(xdr, 8);
4001                 if (unlikely(!p))
4002                         goto out_overflow;
4003                 xdr_decode_hyper(p, res);
4004                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4005         }
4006         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4007         return status;
4008 out_overflow:
4009         print_overflow_msg(__func__, xdr);
4010         return -EIO;
4011 }
4012
4013 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4014 {
4015         __be32 *p;
4016         int status = 0;
4017
4018         *res = 0;
4019         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4020                 return -EIO;
4021         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4022                 p = xdr_inline_decode(xdr, 8);
4023                 if (unlikely(!p))
4024                         goto out_overflow;
4025                 xdr_decode_hyper(p, res);
4026                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4027         }
4028         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4029         return status;
4030 out_overflow:
4031         print_overflow_msg(__func__, xdr);
4032         return -EIO;
4033 }
4034
4035 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4036 {
4037         __be32 *p;
4038         int status = 0;
4039
4040         *res = 0;
4041         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4042                 return -EIO;
4043         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4044                 p = xdr_inline_decode(xdr, 8);
4045                 if (unlikely(!p))
4046                         goto out_overflow;
4047                 xdr_decode_hyper(p, res);
4048                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4049         }
4050         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4051         return status;
4052 out_overflow:
4053         print_overflow_msg(__func__, xdr);
4054         return -EIO;
4055 }
4056
4057 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4058 {
4059         __be32 *p;
4060         int ret = 0;
4061
4062         *used = 0;
4063         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4064                 return -EIO;
4065         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4066                 p = xdr_inline_decode(xdr, 8);
4067                 if (unlikely(!p))
4068                         goto out_overflow;
4069                 xdr_decode_hyper(p, used);
4070                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4071                 ret = NFS_ATTR_FATTR_SPACE_USED;
4072         }
4073         dprintk("%s: space used=%Lu\n", __func__,
4074                         (unsigned long long)*used);
4075         return ret;
4076 out_overflow:
4077         print_overflow_msg(__func__, xdr);
4078         return -EIO;
4079 }
4080
4081 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4082 {
4083         __be32 *p;
4084         uint64_t sec;
4085         uint32_t nsec;
4086
4087         p = xdr_inline_decode(xdr, 12);
4088         if (unlikely(!p))
4089                 goto out_overflow;
4090         p = xdr_decode_hyper(p, &sec);
4091         nsec = be32_to_cpup(p);
4092         time->tv_sec = (time_t)sec;
4093         time->tv_nsec = (long)nsec;
4094         return 0;
4095 out_overflow:
4096         print_overflow_msg(__func__, xdr);
4097         return -EIO;
4098 }
4099
4100 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4101 {
4102         int status = 0;
4103
4104         time->tv_sec = 0;
4105         time->tv_nsec = 0;
4106         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4107                 return -EIO;
4108         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4109                 status = decode_attr_time(xdr, time);
4110                 if (status == 0)
4111                         status = NFS_ATTR_FATTR_ATIME;
4112                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4113         }
4114         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4115         return status;
4116 }
4117
4118 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4119 {
4120         int status = 0;
4121
4122         time->tv_sec = 0;
4123         time->tv_nsec = 0;
4124         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4125                 return -EIO;
4126         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4127                 status = decode_attr_time(xdr, time);
4128                 if (status == 0)
4129                         status = NFS_ATTR_FATTR_CTIME;
4130                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4131         }
4132         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4133         return status;
4134 }
4135
4136 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4137                                   struct timespec *time)
4138 {
4139         int status = 0;
4140
4141         time->tv_sec = 0;
4142         time->tv_nsec = 0;
4143         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4144                 return -EIO;
4145         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4146                 status = decode_attr_time(xdr, time);
4147                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4148         }
4149         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4150                 (long)time->tv_nsec);
4151         return status;
4152 }
4153
4154 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4155                                         struct nfs4_label *label)
4156 {
4157         uint32_t pi = 0;
4158         uint32_t lfs = 0;
4159         __u32 len;
4160         __be32 *p;
4161         int status = 0;
4162
4163         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4164                 return -EIO;
4165         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4166                 p = xdr_inline_decode(xdr, 4);
4167                 if (unlikely(!p))
4168                         goto out_overflow;
4169                 lfs = be32_to_cpup(p++);
4170                 p = xdr_inline_decode(xdr, 4);
4171                 if (unlikely(!p))
4172                         goto out_overflow;
4173                 pi = be32_to_cpup(p++);
4174                 p = xdr_inline_decode(xdr, 4);
4175                 if (unlikely(!p))
4176                         goto out_overflow;
4177                 len = be32_to_cpup(p++);
4178                 p = xdr_inline_decode(xdr, len);
4179                 if (unlikely(!p))
4180                         goto out_overflow;
4181                 if (len < NFS4_MAXLABELLEN) {
4182                         if (label) {
4183                                 memcpy(label->label, p, len);
4184                                 label->len = len;
4185                                 label->pi = pi;
4186                                 label->lfs = lfs;
4187                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4188                         }
4189                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4190                 } else
4191                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4192                                         __func__, len);
4193         }
4194         if (label && label->label)
4195                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4196                         (char *)label->label, label->len, label->pi, label->lfs);
4197         return status;
4198
4199 out_overflow:
4200         print_overflow_msg(__func__, xdr);
4201         return -EIO;
4202 }
4203
4204 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4205 {
4206         int status = 0;
4207
4208         time->tv_sec = 0;
4209         time->tv_nsec = 0;
4210         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4211                 return -EIO;
4212         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4213                 status = decode_attr_time(xdr, time);
4214                 if (status == 0)
4215                         status = NFS_ATTR_FATTR_MTIME;
4216                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4217         }
4218         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4219         return status;
4220 }
4221
4222 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4223 {
4224         unsigned int attrwords = XDR_QUADLEN(attrlen);
4225         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4226
4227         if (unlikely(attrwords != nwords)) {
4228                 dprintk("%s: server returned incorrect attribute length: "
4229                         "%u %c %u\n",
4230                                 __func__,
4231                                 attrwords << 2,
4232                                 (attrwords < nwords) ? '<' : '>',
4233                                 nwords << 2);
4234                 return -EIO;
4235         }
4236         return 0;
4237 }
4238
4239 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4240 {
4241         __be32 *p;
4242
4243         p = xdr_inline_decode(xdr, 20);
4244         if (unlikely(!p))
4245                 goto out_overflow;
4246         cinfo->atomic = be32_to_cpup(p++);
4247         p = xdr_decode_hyper(p, &cinfo->before);
4248         xdr_decode_hyper(p, &cinfo->after);
4249         return 0;
4250 out_overflow:
4251         print_overflow_msg(__func__, xdr);
4252         return -EIO;
4253 }
4254
4255 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4256 {
4257         __be32 *p;
4258         uint32_t supp, acc;
4259         int status;
4260
4261         status = decode_op_hdr(xdr, OP_ACCESS);
4262         if (status)
4263                 return status;
4264         p = xdr_inline_decode(xdr, 8);
4265         if (unlikely(!p))
4266                 goto out_overflow;
4267         supp = be32_to_cpup(p++);
4268         acc = be32_to_cpup(p);
4269         *supported = supp;
4270         *access = acc;
4271         return 0;
4272 out_overflow:
4273         print_overflow_msg(__func__, xdr);
4274         return -EIO;
4275 }
4276
4277 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4278 {
4279         ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4280         if (unlikely(ret < 0)) {
4281                 print_overflow_msg(__func__, xdr);
4282                 return -EIO;
4283         }
4284         return 0;
4285 }
4286
4287 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288 {
4289         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4290 }
4291
4292 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4293 {
4294         stateid->type = NFS4_OPEN_STATEID_TYPE;
4295         return decode_stateid(xdr, stateid);
4296 }
4297
4298 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4299 {
4300         stateid->type = NFS4_LOCK_STATEID_TYPE;
4301         return decode_stateid(xdr, stateid);
4302 }
4303
4304 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4305 {
4306         stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4307         return decode_stateid(xdr, stateid);
4308 }
4309
4310 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4311 {
4312         int status;
4313
4314         status = decode_op_hdr(xdr, OP_CLOSE);
4315         if (status != -EIO)
4316                 nfs_increment_open_seqid(status, res->seqid);
4317         if (!status)
4318                 status = decode_open_stateid(xdr, &res->stateid);
4319         return status;
4320 }
4321
4322 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4323 {
4324         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4325 }
4326
4327 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4328 {
4329         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4330 }
4331
4332 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4333 {
4334         int status;
4335
4336         status = decode_op_hdr(xdr, OP_COMMIT);
4337         if (!status)
4338                 status = decode_write_verifier(xdr, &res->verf->verifier);
4339         return status;
4340 }
4341
4342 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4343 {
4344         __be32 *p;
4345         uint32_t bmlen;
4346         int status;
4347
4348         status = decode_op_hdr(xdr, OP_CREATE);
4349         if (status)
4350                 return status;
4351         if ((status = decode_change_info(xdr, cinfo)))
4352                 return status;
4353         p = xdr_inline_decode(xdr, 4);
4354         if (unlikely(!p))
4355                 goto out_overflow;
4356         bmlen = be32_to_cpup(p);
4357         p = xdr_inline_decode(xdr, bmlen << 2);
4358         if (likely(p))
4359                 return 0;
4360 out_overflow:
4361         print_overflow_msg(__func__, xdr);
4362         return -EIO;
4363 }
4364
4365 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4366 {
4367         unsigned int savep;
4368         uint32_t attrlen, bitmap[3] = {0};
4369         int status;
4370
4371         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4372                 goto xdr_error;
4373         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4374                 goto xdr_error;
4375         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4376                 goto xdr_error;
4377         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4378                 goto xdr_error;
4379         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4380                                                  &res->fh_expire_type)) != 0)
4381                 goto xdr_error;
4382         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4383                 goto xdr_error;
4384         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4387                 goto xdr_error;
4388         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4389                                 res->exclcreat_bitmask)) != 0)
4390                 goto xdr_error;
4391         status = verify_attr_len(xdr, savep, attrlen);
4392 xdr_error:
4393         dprintk("%s: xdr returned %d!\n", __func__, -status);
4394         return status;
4395 }
4396
4397 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4398 {
4399         unsigned int savep;
4400         uint32_t attrlen, bitmap[3] = {0};
4401         int status;
4402
4403         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4404                 goto xdr_error;
4405         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4406                 goto xdr_error;
4407         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4408                 goto xdr_error;
4409
4410         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4411                 goto xdr_error;
4412         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4413                 goto xdr_error;
4414         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4415                 goto xdr_error;
4416
4417         status = -EIO;
4418         if (unlikely(bitmap[0]))
4419                 goto xdr_error;
4420
4421         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4422                 goto xdr_error;
4423         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4426                 goto xdr_error;
4427
4428         status = verify_attr_len(xdr, savep, attrlen);
4429 xdr_error:
4430         dprintk("%s: xdr returned %d!\n", __func__, -status);
4431         return status;
4432 }
4433
4434 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4435 {
4436         unsigned int savep;
4437         uint32_t attrlen, bitmap[3] = {0};
4438         int status;
4439
4440         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4441                 goto xdr_error;
4442         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4443                 goto xdr_error;
4444         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4445                 goto xdr_error;
4446
4447         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4448                 goto xdr_error;
4449         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4450                 goto xdr_error;
4451
4452         status = verify_attr_len(xdr, savep, attrlen);
4453 xdr_error:
4454         dprintk("%s: xdr returned %d!\n", __func__, -status);
4455         return status;
4456 }
4457
4458 static int decode_threshold_hint(struct xdr_stream *xdr,
4459                                   uint32_t *bitmap,
4460                                   uint64_t *res,
4461                                   uint32_t hint_bit)
4462 {
4463         __be32 *p;
4464
4465         *res = 0;
4466         if (likely(bitmap[0] & hint_bit)) {
4467                 p = xdr_inline_decode(xdr, 8);
4468                 if (unlikely(!p))
4469                         goto out_overflow;
4470                 xdr_decode_hyper(p, res);
4471         }
4472         return 0;
4473 out_overflow:
4474         print_overflow_msg(__func__, xdr);
4475         return -EIO;
4476 }
4477
4478 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4479                                         struct nfs4_threshold *res)
4480 {
4481         __be32 *p;
4482         unsigned int savep;
4483         uint32_t bitmap[3] = {0,}, attrlen;
4484         int status;
4485
4486         /* layout type */
4487         p = xdr_inline_decode(xdr, 4);
4488         if (unlikely(!p)) {
4489                 print_overflow_msg(__func__, xdr);
4490                 return -EIO;
4491         }
4492         res->l_type = be32_to_cpup(p);
4493
4494         /* thi_hintset bitmap */
4495         status = decode_attr_bitmap(xdr, bitmap);
4496         if (status < 0)
4497                 goto xdr_error;
4498
4499         /* thi_hintlist length */
4500         status = decode_attr_length(xdr, &attrlen, &savep);
4501         if (status < 0)
4502                 goto xdr_error;
4503         /* thi_hintlist */
4504         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4505         if (status < 0)
4506                 goto xdr_error;
4507         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4508         if (status < 0)
4509                 goto xdr_error;
4510         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4511                                        THRESHOLD_RD_IO);
4512         if (status < 0)
4513                 goto xdr_error;
4514         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4515                                        THRESHOLD_WR_IO);
4516         if (status < 0)
4517                 goto xdr_error;
4518
4519         status = verify_attr_len(xdr, savep, attrlen);
4520         res->bm = bitmap[0];
4521
4522         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4523                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4524                 res->wr_io_sz);
4525 xdr_error:
4526         dprintk("%s ret=%d!\n", __func__, status);
4527         return status;
4528 }
4529
4530 /*
4531  * Thresholds on pNFS direct I/O vrs MDS I/O
4532  */
4533 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4534                                     uint32_t *bitmap,
4535                                     struct nfs4_threshold *res)
4536 {
4537         __be32 *p;
4538         int status = 0;
4539         uint32_t num;
4540
4541         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4542                 return -EIO;
4543         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4544                 /* Did the server return an unrequested attribute? */
4545                 if (unlikely(res == NULL))
4546                         return -EREMOTEIO;
4547                 p = xdr_inline_decode(xdr, 4);
4548                 if (unlikely(!p))
4549                         goto out_overflow;
4550                 num = be32_to_cpup(p);
4551                 if (num == 0)
4552                         return 0;
4553                 if (num > 1)
4554                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4555                                 "drivers per filesystem not supported\n",
4556                                 __func__);
4557
4558                 status = decode_first_threshold_item4(xdr, res);
4559                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4560         }
4561         return status;
4562 out_overflow:
4563         print_overflow_msg(__func__, xdr);
4564         return -EIO;
4565 }
4566
4567 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4568                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4569                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4570                 const struct nfs_server *server)
4571 {
4572         int status;
4573         umode_t fmode = 0;
4574         uint32_t type;
4575         int32_t err;
4576
4577         status = decode_attr_type(xdr, bitmap, &type);
4578         if (status < 0)
4579                 goto xdr_error;
4580         fattr->mode = 0;
4581         if (status != 0) {
4582                 fattr->mode |= nfs_type2fmt[type];
4583                 fattr->valid |= status;
4584         }
4585
4586         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4587         if (status < 0)
4588                 goto xdr_error;
4589         fattr->valid |= status;
4590
4591         status = decode_attr_size(xdr, bitmap, &fattr->size);
4592         if (status < 0)
4593                 goto xdr_error;
4594         fattr->valid |= status;
4595
4596         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4597         if (status < 0)
4598                 goto xdr_error;
4599         fattr->valid |= status;
4600
4601         err = 0;
4602         status = decode_attr_error(xdr, bitmap, &err);
4603         if (status < 0)
4604                 goto xdr_error;
4605
4606         status = decode_attr_filehandle(xdr, bitmap, fh);
4607         if (status < 0)
4608                 goto xdr_error;
4609
4610         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4611         if (status < 0)
4612                 goto xdr_error;
4613         fattr->valid |= status;
4614
4615         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4616         if (status < 0)
4617                 goto xdr_error;
4618         fattr->valid |= status;
4619
4620         status = -EIO;
4621         if (unlikely(bitmap[0]))
4622                 goto xdr_error;
4623
4624         status = decode_attr_mode(xdr, bitmap, &fmode);
4625         if (status < 0)
4626                 goto xdr_error;
4627         if (status != 0) {
4628                 fattr->mode |= fmode;
4629                 fattr->valid |= status;
4630         }
4631
4632         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4633         if (status < 0)
4634                 goto xdr_error;
4635         fattr->valid |= status;
4636
4637         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4638         if (status < 0)
4639                 goto xdr_error;
4640         fattr->valid |= status;
4641
4642         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4643         if (status < 0)
4644                 goto xdr_error;
4645         fattr->valid |= status;
4646
4647         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4648         if (status < 0)
4649                 goto xdr_error;
4650         fattr->valid |= status;
4651
4652         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4653         if (status < 0)
4654                 goto xdr_error;
4655         fattr->valid |= status;
4656
4657         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4658         if (status < 0)
4659                 goto xdr_error;
4660         fattr->valid |= status;
4661
4662         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4663         if (status < 0)
4664                 goto xdr_error;
4665         fattr->valid |= status;
4666
4667         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4668         if (status < 0)
4669                 goto xdr_error;
4670         fattr->valid |= status;
4671
4672         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4673         if (status < 0)
4674                 goto xdr_error;
4675         fattr->valid |= status;
4676
4677         status = -EIO;
4678         if (unlikely(bitmap[1]))
4679                 goto xdr_error;
4680
4681         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4682         if (status < 0)
4683                 goto xdr_error;
4684
4685         if (label) {
4686                 status = decode_attr_security_label(xdr, bitmap, label);
4687                 if (status < 0)
4688                         goto xdr_error;
4689                 fattr->valid |= status;
4690         }
4691
4692 xdr_error:
4693         dprintk("%s: xdr returned %d\n", __func__, -status);
4694         return status;
4695 }
4696
4697 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4698                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4699                 struct nfs4_label *label, const struct nfs_server *server)
4700 {
4701         unsigned int savep;
4702         uint32_t attrlen,
4703                  bitmap[3] = {0};
4704         int status;
4705
4706         status = decode_op_hdr(xdr, OP_GETATTR);
4707         if (status < 0)
4708                 goto xdr_error;
4709
4710         status = decode_attr_bitmap(xdr, bitmap);
4711         if (status < 0)
4712                 goto xdr_error;
4713
4714         status = decode_attr_length(xdr, &attrlen, &savep);
4715         if (status < 0)
4716                 goto xdr_error;
4717
4718         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4719                                         label, server);
4720         if (status < 0)
4721                 goto xdr_error;
4722
4723         status = verify_attr_len(xdr, savep, attrlen);
4724 xdr_error:
4725         dprintk("%s: xdr returned %d\n", __func__, -status);
4726         return status;
4727 }
4728
4729 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4730                 struct nfs4_label *label, const struct nfs_server *server)
4731 {
4732         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4733 }
4734
4735 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4736                 const struct nfs_server *server)
4737 {
4738         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4739 }
4740
4741 /*
4742  * Decode potentially multiple layout types.
4743  */
4744 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4745                                     struct nfs_fsinfo *fsinfo)
4746 {
4747         __be32 *p;
4748         uint32_t i;
4749
4750         p = xdr_inline_decode(xdr, 4);
4751         if (unlikely(!p))
4752                 goto out_overflow;
4753         fsinfo->nlayouttypes = be32_to_cpup(p);
4754
4755         /* pNFS is not supported by the underlying file system */
4756         if (fsinfo->nlayouttypes == 0)
4757                 return 0;
4758
4759         /* Decode and set first layout type, move xdr->p past unused types */
4760         p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4761         if (unlikely(!p))
4762                 goto out_overflow;
4763
4764         /* If we get too many, then just cap it at the max */
4765         if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4766                 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4767                         __func__, fsinfo->nlayouttypes);
4768                 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4769         }
4770
4771         for(i = 0; i < fsinfo->nlayouttypes; ++i)
4772                 fsinfo->layouttype[i] = be32_to_cpup(p++);
4773         return 0;
4774 out_overflow:
4775         print_overflow_msg(__func__, xdr);
4776         return -EIO;
4777 }
4778
4779 /*
4780  * The type of file system exported.
4781  * Note we must ensure that layouttype is set in any non-error case.
4782  */
4783 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4784                                 struct nfs_fsinfo *fsinfo)
4785 {
4786         int status = 0;
4787
4788         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4789         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4790                 return -EIO;
4791         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4792                 status = decode_pnfs_layout_types(xdr, fsinfo);
4793                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4794         }
4795         return status;
4796 }
4797
4798 /*
4799  * The prefered block size for layout directed io
4800  */
4801 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4802                                       uint32_t *res)
4803 {
4804         __be32 *p;
4805
4806         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4807         *res = 0;
4808         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4809                 p = xdr_inline_decode(xdr, 4);
4810                 if (unlikely(!p)) {
4811                         print_overflow_msg(__func__, xdr);
4812                         return -EIO;
4813                 }
4814                 *res = be32_to_cpup(p);
4815                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4816         }
4817         return 0;
4818 }
4819
4820 /*
4821  * The granularity of a CLONE operation.
4822  */
4823 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4824                                      uint32_t *res)
4825 {
4826         __be32 *p;
4827
4828         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4829         *res = 0;
4830         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4831                 p = xdr_inline_decode(xdr, 4);
4832                 if (unlikely(!p)) {
4833                         print_overflow_msg(__func__, xdr);
4834                         return -EIO;
4835                 }
4836                 *res = be32_to_cpup(p);
4837                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4838         }
4839         return 0;
4840 }
4841
4842 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4843 {
4844         unsigned int savep;
4845         uint32_t attrlen, bitmap[3];
4846         int status;
4847
4848         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4849                 goto xdr_error;
4850         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4851                 goto xdr_error;
4852         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4853                 goto xdr_error;
4854
4855         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4856
4857         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4858                 goto xdr_error;
4859         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4860                 goto xdr_error;
4861         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4862                 goto xdr_error;
4863         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4864         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4865                 goto xdr_error;
4866         fsinfo->wtpref = fsinfo->wtmax;
4867
4868         status = -EIO;
4869         if (unlikely(bitmap[0]))
4870                 goto xdr_error;
4871
4872         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4873         if (status != 0)
4874                 goto xdr_error;
4875         status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4876         if (status != 0)
4877                 goto xdr_error;
4878
4879         status = -EIO;
4880         if (unlikely(bitmap[1]))
4881                 goto xdr_error;
4882
4883         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4884         if (status)
4885                 goto xdr_error;
4886         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4887         if (status)
4888                 goto xdr_error;
4889
4890         status = verify_attr_len(xdr, savep, attrlen);
4891 xdr_error:
4892         dprintk("%s: xdr returned %d!\n", __func__, -status);
4893         return status;
4894 }
4895
4896 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4897 {
4898         __be32 *p;
4899         uint32_t len;
4900         int status;
4901
4902         /* Zero handle first to allow comparisons */
4903         memset(fh, 0, sizeof(*fh));
4904
4905         status = decode_op_hdr(xdr, OP_GETFH);
4906         if (status)
4907                 return status;
4908
4909         p = xdr_inline_decode(xdr, 4);
4910         if (unlikely(!p))
4911                 goto out_overflow;
4912         len = be32_to_cpup(p);
4913         if (len > NFS4_FHSIZE)
4914                 return -EIO;
4915         fh->size = len;
4916         p = xdr_inline_decode(xdr, len);
4917         if (unlikely(!p))
4918                 goto out_overflow;
4919         memcpy(fh->data, p, len);
4920         return 0;
4921 out_overflow:
4922         print_overflow_msg(__func__, xdr);
4923         return -EIO;
4924 }
4925
4926 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4927 {
4928         int status;
4929
4930         status = decode_op_hdr(xdr, OP_LINK);
4931         if (status)
4932                 return status;
4933         return decode_change_info(xdr, cinfo);
4934 }
4935
4936 /*
4937  * We create the owner, so we know a proper owner.id length is 4.
4938  */
4939 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4940 {
4941         uint64_t offset, length, clientid;
4942         __be32 *p;
4943         uint32_t namelen, type;
4944
4945         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4946         if (unlikely(!p))
4947                 goto out_overflow;
4948         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4949         p = xdr_decode_hyper(p, &length);
4950         type = be32_to_cpup(p++); /* 4 byte read */
4951         if (fl != NULL) { /* manipulate file lock */
4952                 fl->fl_start = (loff_t)offset;
4953                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4954                 if (length == ~(uint64_t)0)
4955                         fl->fl_end = OFFSET_MAX;
4956                 fl->fl_type = F_WRLCK;
4957                 if (type & 1)
4958                         fl->fl_type = F_RDLCK;
4959                 fl->fl_pid = 0;
4960         }
4961         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4962         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4963         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4964         if (likely(p))
4965                 return -NFS4ERR_DENIED;
4966 out_overflow:
4967         print_overflow_msg(__func__, xdr);
4968         return -EIO;
4969 }
4970
4971 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4972 {
4973         int status;
4974
4975         status = decode_op_hdr(xdr, OP_LOCK);
4976         if (status == -EIO)
4977                 goto out;
4978         if (status == 0) {
4979                 status = decode_lock_stateid(xdr, &res->stateid);
4980                 if (unlikely(status))
4981                         goto out;
4982         } else if (status == -NFS4ERR_DENIED)
4983                 status = decode_lock_denied(xdr, NULL);
4984         if (res->open_seqid != NULL)
4985                 nfs_increment_open_seqid(status, res->open_seqid);
4986         nfs_increment_lock_seqid(status, res->lock_seqid);
4987 out:
4988         return status;
4989 }
4990
4991 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4992 {
4993         int status;
4994         status = decode_op_hdr(xdr, OP_LOCKT);
4995         if (status == -NFS4ERR_DENIED)
4996                 return decode_lock_denied(xdr, res->denied);
4997         return status;
4998 }
4999
5000 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5001 {
5002         int status;
5003
5004         status = decode_op_hdr(xdr, OP_LOCKU);
5005         if (status != -EIO)
5006                 nfs_increment_lock_seqid(status, res->seqid);
5007         if (status == 0)
5008                 status = decode_lock_stateid(xdr, &res->stateid);
5009         return status;
5010 }
5011
5012 static int decode_release_lockowner(struct xdr_stream *xdr)
5013 {
5014         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5015 }
5016
5017 static int decode_lookup(struct xdr_stream *xdr)
5018 {
5019         return decode_op_hdr(xdr, OP_LOOKUP);
5020 }
5021
5022 /* This is too sick! */
5023 static int decode_space_limit(struct xdr_stream *xdr,
5024                 unsigned long *pagemod_limit)
5025 {
5026         __be32 *p;
5027         uint32_t limit_type, nblocks, blocksize;
5028         u64 maxsize = 0;
5029
5030         p = xdr_inline_decode(xdr, 12);
5031         if (unlikely(!p))
5032                 goto out_overflow;
5033         limit_type = be32_to_cpup(p++);
5034         switch (limit_type) {
5035         case NFS4_LIMIT_SIZE:
5036                 xdr_decode_hyper(p, &maxsize);
5037                 break;
5038         case NFS4_LIMIT_BLOCKS:
5039                 nblocks = be32_to_cpup(p++);
5040                 blocksize = be32_to_cpup(p);
5041                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5042         }
5043         maxsize >>= PAGE_SHIFT;
5044         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5045         return 0;
5046 out_overflow:
5047         print_overflow_msg(__func__, xdr);
5048         return -EIO;
5049 }
5050
5051 static int decode_rw_delegation(struct xdr_stream *xdr,
5052                 uint32_t delegation_type,
5053                 struct nfs_openres *res)
5054 {
5055         __be32 *p;
5056         int status;
5057
5058         status = decode_delegation_stateid(xdr, &res->delegation);
5059         if (unlikely(status))
5060                 return status;
5061         p = xdr_inline_decode(xdr, 4);
5062         if (unlikely(!p))
5063                 goto out_overflow;
5064         res->do_recall = be32_to_cpup(p);
5065
5066         switch (delegation_type) {
5067         case NFS4_OPEN_DELEGATE_READ:
5068                 res->delegation_type = FMODE_READ;
5069                 break;
5070         case NFS4_OPEN_DELEGATE_WRITE:
5071                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5072                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5073                                 return -EIO;
5074         }
5075         return decode_ace(xdr, NULL);
5076 out_overflow:
5077         print_overflow_msg(__func__, xdr);
5078         return -EIO;
5079 }
5080
5081 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5082 {
5083         __be32 *p;
5084         uint32_t why_no_delegation;
5085
5086         p = xdr_inline_decode(xdr, 4);
5087         if (unlikely(!p))
5088                 goto out_overflow;
5089         why_no_delegation = be32_to_cpup(p);
5090         switch (why_no_delegation) {
5091                 case WND4_CONTENTION:
5092                 case WND4_RESOURCE:
5093                         xdr_inline_decode(xdr, 4);
5094                         /* Ignore for now */
5095         }
5096         return 0;
5097 out_overflow:
5098         print_overflow_msg(__func__, xdr);
5099         return -EIO;
5100 }
5101
5102 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5103 {
5104         __be32 *p;
5105         uint32_t delegation_type;
5106
5107         p = xdr_inline_decode(xdr, 4);
5108         if (unlikely(!p))
5109                 goto out_overflow;
5110         delegation_type = be32_to_cpup(p);
5111         res->delegation_type = 0;
5112         switch (delegation_type) {
5113         case NFS4_OPEN_DELEGATE_NONE:
5114                 return 0;
5115         case NFS4_OPEN_DELEGATE_READ:
5116         case NFS4_OPEN_DELEGATE_WRITE:
5117                 return decode_rw_delegation(xdr, delegation_type, res);
5118         case NFS4_OPEN_DELEGATE_NONE_EXT:
5119                 return decode_no_delegation(xdr, res);
5120         }
5121         return -EIO;
5122 out_overflow:
5123         print_overflow_msg(__func__, xdr);
5124         return -EIO;
5125 }
5126
5127 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5128 {
5129         __be32 *p;
5130         uint32_t savewords, bmlen, i;
5131         int status;
5132
5133         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5134                 return status;
5135         nfs_increment_open_seqid(status, res->seqid);
5136         if (status)
5137                 return status;
5138         status = decode_open_stateid(xdr, &res->stateid);
5139         if (unlikely(status))
5140                 return status;
5141
5142         decode_change_info(xdr, &res->cinfo);
5143
5144         p = xdr_inline_decode(xdr, 8);
5145         if (unlikely(!p))
5146                 goto out_overflow;
5147         res->rflags = be32_to_cpup(p++);
5148         bmlen = be32_to_cpup(p);
5149         if (bmlen > 10)
5150                 goto xdr_error;
5151
5152         p = xdr_inline_decode(xdr, bmlen << 2);
5153         if (unlikely(!p))
5154                 goto out_overflow;
5155         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5156         for (i = 0; i < savewords; ++i)
5157                 res->attrset[i] = be32_to_cpup(p++);
5158         for (; i < NFS4_BITMAP_SIZE; i++)
5159                 res->attrset[i] = 0;
5160
5161         return decode_delegation(xdr, res);
5162 xdr_error:
5163         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5164         return -EIO;
5165 out_overflow:
5166         print_overflow_msg(__func__, xdr);
5167         return -EIO;
5168 }
5169
5170 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5171 {
5172         int status;
5173
5174         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5175         if (status != -EIO)
5176                 nfs_increment_open_seqid(status, res->seqid);
5177         if (!status)
5178                 status = decode_open_stateid(xdr, &res->stateid);
5179         return status;
5180 }
5181
5182 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5183 {
5184         int status;
5185
5186         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5187         if (status != -EIO)
5188                 nfs_increment_open_seqid(status, res->seqid);
5189         if (!status)
5190                 status = decode_open_stateid(xdr, &res->stateid);
5191         return status;
5192 }
5193
5194 static int decode_putfh(struct xdr_stream *xdr)
5195 {
5196         return decode_op_hdr(xdr, OP_PUTFH);
5197 }
5198
5199 static int decode_putrootfh(struct xdr_stream *xdr)
5200 {
5201         return decode_op_hdr(xdr, OP_PUTROOTFH);
5202 }
5203
5204 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5205                        struct nfs_pgio_res *res)
5206 {
5207         __be32 *p;
5208         uint32_t count, eof, recvd;
5209         int status;
5210
5211         status = decode_op_hdr(xdr, OP_READ);
5212         if (status)
5213                 return status;
5214         p = xdr_inline_decode(xdr, 8);
5215         if (unlikely(!p))
5216                 goto out_overflow;
5217         eof = be32_to_cpup(p++);
5218         count = be32_to_cpup(p);
5219         recvd = xdr_read_pages(xdr, count);
5220         if (count > recvd) {
5221                 dprintk("NFS: server cheating in read reply: "
5222                                 "count %u > recvd %u\n", count, recvd);
5223                 count = recvd;
5224                 eof = 0;
5225         }
5226         res->eof = eof;
5227         res->count = count;
5228         return 0;
5229 out_overflow:
5230         print_overflow_msg(__func__, xdr);
5231         return -EIO;
5232 }
5233
5234 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5235 {
5236         int             status;
5237         __be32          verf[2];
5238
5239         status = decode_op_hdr(xdr, OP_READDIR);
5240         if (!status)
5241                 status = decode_verifier(xdr, readdir->verifier.data);
5242         if (unlikely(status))
5243                 return status;
5244         memcpy(verf, readdir->verifier.data, sizeof(verf));
5245         dprintk("%s: verifier = %08x:%08x\n",
5246                         __func__, verf[0], verf[1]);
5247         return xdr_read_pages(xdr, xdr->buf->page_len);
5248 }
5249
5250 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5251 {
5252         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5253         u32 len, recvd;
5254         __be32 *p;
5255         int status;
5256
5257         status = decode_op_hdr(xdr, OP_READLINK);
5258         if (status)
5259                 return status;
5260
5261         /* Convert length of symlink */
5262         p = xdr_inline_decode(xdr, 4);
5263         if (unlikely(!p))
5264                 goto out_overflow;
5265         len = be32_to_cpup(p);
5266         if (len >= rcvbuf->page_len || len <= 0) {
5267                 dprintk("nfs: server returned giant symlink!\n");
5268                 return -ENAMETOOLONG;
5269         }
5270         recvd = xdr_read_pages(xdr, len);
5271         if (recvd < len) {
5272                 dprintk("NFS: server cheating in readlink reply: "
5273                                 "count %u > recvd %u\n", len, recvd);
5274                 return -EIO;
5275         }
5276         /*
5277          * The XDR encode routine has set things up so that
5278          * the link text will be copied directly into the
5279          * buffer.  We just have to do overflow-checking,
5280          * and and null-terminate the text (the VFS expects
5281          * null-termination).
5282          */
5283         xdr_terminate_string(rcvbuf, len);
5284         return 0;
5285 out_overflow:
5286         print_overflow_msg(__func__, xdr);
5287         return -EIO;
5288 }
5289
5290 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5291 {
5292         int status;
5293
5294         status = decode_op_hdr(xdr, OP_REMOVE);
5295         if (status)
5296                 goto out;
5297         status = decode_change_info(xdr, cinfo);
5298 out:
5299         return status;
5300 }
5301
5302 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5303               struct nfs4_change_info *new_cinfo)
5304 {
5305         int status;
5306
5307         status = decode_op_hdr(xdr, OP_RENAME);
5308         if (status)
5309                 goto out;
5310         if ((status = decode_change_info(xdr, old_cinfo)))
5311                 goto out;
5312         status = decode_change_info(xdr, new_cinfo);
5313 out:
5314         return status;
5315 }
5316
5317 static int decode_renew(struct xdr_stream *xdr)
5318 {
5319         return decode_op_hdr(xdr, OP_RENEW);
5320 }
5321
5322 static int
5323 decode_restorefh(struct xdr_stream *xdr)
5324 {
5325         return decode_op_hdr(xdr, OP_RESTOREFH);
5326 }
5327
5328 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5329                          struct nfs_getaclres *res)
5330 {
5331         unsigned int savep;
5332         uint32_t attrlen,
5333                  bitmap[3] = {0};
5334         int status;
5335         unsigned int pg_offset;
5336
5337         res->acl_len = 0;
5338         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5339                 goto out;
5340
5341         xdr_enter_page(xdr, xdr->buf->page_len);
5342
5343         /* Calculate the offset of the page data */
5344         pg_offset = xdr->buf->head[0].iov_len;
5345
5346         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5347                 goto out;
5348         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5349                 goto out;
5350
5351         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5352                 return -EIO;
5353         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5354
5355                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5356                  * are stored with the acl data to handle the problem of
5357                  * variable length bitmaps.*/
5358                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5359                 res->acl_len = attrlen;
5360
5361                 /* Check for receive buffer overflow */
5362                 if (res->acl_len > (xdr->nwords << 2) ||
5363                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5364                         res->acl_flags |= NFS4_ACL_TRUNC;
5365                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5366                                         attrlen, xdr->nwords << 2);
5367                 }
5368         } else
5369                 status = -EOPNOTSUPP;
5370
5371 out:
5372         return status;
5373 }
5374
5375 static int
5376 decode_savefh(struct xdr_stream *xdr)
5377 {
5378         return decode_op_hdr(xdr, OP_SAVEFH);
5379 }
5380
5381 static int decode_setattr(struct xdr_stream *xdr)
5382 {
5383         __be32 *p;
5384         uint32_t bmlen;
5385         int status;
5386
5387         status = decode_op_hdr(xdr, OP_SETATTR);
5388         if (status)
5389                 return status;
5390         p = xdr_inline_decode(xdr, 4);
5391         if (unlikely(!p))
5392                 goto out_overflow;
5393         bmlen = be32_to_cpup(p);
5394         p = xdr_inline_decode(xdr, bmlen << 2);
5395         if (likely(p))
5396                 return 0;
5397 out_overflow:
5398         print_overflow_msg(__func__, xdr);
5399         return -EIO;
5400 }
5401
5402 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5403 {
5404         __be32 *p;
5405         uint32_t opnum;
5406         int32_t nfserr;
5407
5408         p = xdr_inline_decode(xdr, 8);
5409         if (unlikely(!p))
5410                 goto out_overflow;
5411         opnum = be32_to_cpup(p++);
5412         if (opnum != OP_SETCLIENTID) {
5413                 dprintk("nfs: decode_setclientid: Server returned operation"
5414                         " %d\n", opnum);
5415                 return -EIO;
5416         }
5417         nfserr = be32_to_cpup(p);
5418         if (nfserr == NFS_OK) {
5419                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5420                 if (unlikely(!p))
5421                         goto out_overflow;
5422                 p = xdr_decode_hyper(p, &res->clientid);
5423                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5424         } else if (nfserr == NFSERR_CLID_INUSE) {
5425                 uint32_t len;
5426
5427                 /* skip netid string */
5428                 p = xdr_inline_decode(xdr, 4);
5429                 if (unlikely(!p))
5430                         goto out_overflow;
5431                 len = be32_to_cpup(p);
5432                 p = xdr_inline_decode(xdr, len);
5433                 if (unlikely(!p))
5434                         goto out_overflow;
5435
5436                 /* skip uaddr string */
5437                 p = xdr_inline_decode(xdr, 4);
5438                 if (unlikely(!p))
5439                         goto out_overflow;
5440                 len = be32_to_cpup(p);
5441                 p = xdr_inline_decode(xdr, len);
5442                 if (unlikely(!p))
5443                         goto out_overflow;
5444                 return -NFSERR_CLID_INUSE;
5445         } else
5446                 return nfs4_stat_to_errno(nfserr);
5447
5448         return 0;
5449 out_overflow:
5450         print_overflow_msg(__func__, xdr);
5451         return -EIO;
5452 }
5453
5454 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5455 {
5456         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5457 }
5458
5459 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5460 {
5461         __be32 *p;
5462         int status;
5463
5464         status = decode_op_hdr(xdr, OP_WRITE);
5465         if (status)
5466                 return status;
5467
5468         p = xdr_inline_decode(xdr, 8);
5469         if (unlikely(!p))
5470                 goto out_overflow;
5471         res->count = be32_to_cpup(p++);
5472         res->verf->committed = be32_to_cpup(p++);
5473         return decode_write_verifier(xdr, &res->verf->verifier);
5474 out_overflow:
5475         print_overflow_msg(__func__, xdr);
5476         return -EIO;
5477 }
5478
5479 static int decode_delegreturn(struct xdr_stream *xdr)
5480 {
5481         return decode_op_hdr(xdr, OP_DELEGRETURN);
5482 }
5483
5484 static int decode_secinfo_gss(struct xdr_stream *xdr,
5485                               struct nfs4_secinfo4 *flavor)
5486 {
5487         u32 oid_len;
5488         __be32 *p;
5489
5490         p = xdr_inline_decode(xdr, 4);
5491         if (unlikely(!p))
5492                 goto out_overflow;
5493         oid_len = be32_to_cpup(p);
5494         if (oid_len > GSS_OID_MAX_LEN)
5495                 goto out_err;
5496
5497         p = xdr_inline_decode(xdr, oid_len);
5498         if (unlikely(!p))
5499                 goto out_overflow;
5500         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5501         flavor->flavor_info.oid.len = oid_len;
5502
5503         p = xdr_inline_decode(xdr, 8);
5504         if (unlikely(!p))
5505                 goto out_overflow;
5506         flavor->flavor_info.qop = be32_to_cpup(p++);
5507         flavor->flavor_info.service = be32_to_cpup(p);
5508
5509         return 0;
5510
5511 out_overflow:
5512         print_overflow_msg(__func__, xdr);
5513         return -EIO;
5514 out_err:
5515         return -EINVAL;
5516 }
5517
5518 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5519 {
5520         struct nfs4_secinfo4 *sec_flavor;
5521         unsigned int i, num_flavors;
5522         int status;
5523         __be32 *p;
5524
5525         p = xdr_inline_decode(xdr, 4);
5526         if (unlikely(!p))
5527                 goto out_overflow;
5528
5529         res->flavors->num_flavors = 0;
5530         num_flavors = be32_to_cpup(p);
5531
5532         for (i = 0; i < num_flavors; i++) {
5533                 sec_flavor = &res->flavors->flavors[i];
5534                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5535                         break;
5536
5537                 p = xdr_inline_decode(xdr, 4);
5538                 if (unlikely(!p))
5539                         goto out_overflow;
5540                 sec_flavor->flavor = be32_to_cpup(p);
5541
5542                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5543                         status = decode_secinfo_gss(xdr, sec_flavor);
5544                         if (status)
5545                                 goto out;
5546                 }
5547                 res->flavors->num_flavors++;
5548         }
5549
5550         status = 0;
5551 out:
5552         return status;
5553 out_overflow:
5554         print_overflow_msg(__func__, xdr);
5555         return -EIO;
5556 }
5557
5558 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5559 {
5560         int status = decode_op_hdr(xdr, OP_SECINFO);
5561         if (status)
5562                 return status;
5563         return decode_secinfo_common(xdr, res);
5564 }
5565
5566 #if defined(CONFIG_NFS_V4_1)
5567 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5568 {
5569         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5570         if (status)
5571                 return status;
5572         return decode_secinfo_common(xdr, res);
5573 }
5574
5575 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5576 {
5577         __be32 *p;
5578         uint32_t bitmap_words;
5579         unsigned int i;
5580
5581         p = xdr_inline_decode(xdr, 4);
5582         bitmap_words = be32_to_cpup(p++);
5583         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5584                 return -EIO;
5585         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5586         for (i = 0; i < bitmap_words; i++)
5587                 op_map->u.words[i] = be32_to_cpup(p++);
5588
5589         return 0;
5590 }
5591
5592 static int decode_exchange_id(struct xdr_stream *xdr,
5593                               struct nfs41_exchange_id_res *res)
5594 {
5595         __be32 *p;
5596         uint32_t dummy;
5597         char *dummy_str;
5598         int status;
5599         uint32_t impl_id_count;
5600
5601         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5602         if (status)
5603                 return status;
5604
5605         p = xdr_inline_decode(xdr, 8);
5606         if (unlikely(!p))
5607                 goto out_overflow;
5608         xdr_decode_hyper(p, &res->clientid);
5609         p = xdr_inline_decode(xdr, 12);
5610         if (unlikely(!p))
5611                 goto out_overflow;
5612         res->seqid = be32_to_cpup(p++);
5613         res->flags = be32_to_cpup(p++);
5614
5615         res->state_protect.how = be32_to_cpup(p);
5616         switch (res->state_protect.how) {
5617         case SP4_NONE:
5618                 break;
5619         case SP4_MACH_CRED:
5620                 status = decode_op_map(xdr, &res->state_protect.enforce);
5621                 if (status)
5622                         return status;
5623                 status = decode_op_map(xdr, &res->state_protect.allow);
5624                 if (status)
5625                         return status;
5626                 break;
5627         default:
5628                 WARN_ON_ONCE(1);
5629                 return -EIO;
5630         }
5631
5632         /* server_owner4.so_minor_id */
5633         p = xdr_inline_decode(xdr, 8);
5634         if (unlikely(!p))
5635                 goto out_overflow;
5636         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5637
5638         /* server_owner4.so_major_id */
5639         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5640         if (unlikely(status))
5641                 return status;
5642         memcpy(res->server_owner->major_id, dummy_str, dummy);
5643         res->server_owner->major_id_sz = dummy;
5644
5645         /* server_scope4 */
5646         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5647         if (unlikely(status))
5648                 return status;
5649         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5650         res->server_scope->server_scope_sz = dummy;
5651
5652         /* Implementation Id */
5653         p = xdr_inline_decode(xdr, 4);
5654         if (unlikely(!p))
5655                 goto out_overflow;
5656         impl_id_count = be32_to_cpup(p++);
5657
5658         if (impl_id_count) {
5659                 /* nii_domain */
5660                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661                 if (unlikely(status))
5662                         return status;
5663                 memcpy(res->impl_id->domain, dummy_str, dummy);
5664
5665                 /* nii_name */
5666                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5667                 if (unlikely(status))
5668                         return status;
5669                 memcpy(res->impl_id->name, dummy_str, dummy);
5670
5671                 /* nii_date */
5672                 p = xdr_inline_decode(xdr, 12);
5673                 if (unlikely(!p))
5674                         goto out_overflow;
5675                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5676                 res->impl_id->date.nseconds = be32_to_cpup(p);
5677
5678                 /* if there's more than one entry, ignore the rest */
5679         }
5680         return 0;
5681 out_overflow:
5682         print_overflow_msg(__func__, xdr);
5683         return -EIO;
5684 }
5685
5686 static int decode_chan_attrs(struct xdr_stream *xdr,
5687                              struct nfs4_channel_attrs *attrs)
5688 {
5689         __be32 *p;
5690         u32 nr_attrs, val;
5691
5692         p = xdr_inline_decode(xdr, 28);
5693         if (unlikely(!p))
5694                 goto out_overflow;
5695         val = be32_to_cpup(p++);        /* headerpadsz */
5696         if (val)
5697                 return -EINVAL;         /* no support for header padding yet */
5698         attrs->max_rqst_sz = be32_to_cpup(p++);
5699         attrs->max_resp_sz = be32_to_cpup(p++);
5700         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5701         attrs->max_ops = be32_to_cpup(p++);
5702         attrs->max_reqs = be32_to_cpup(p++);
5703         nr_attrs = be32_to_cpup(p);
5704         if (unlikely(nr_attrs > 1)) {
5705                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5706                         "count %u\n", __func__, nr_attrs);
5707                 return -EINVAL;
5708         }
5709         if (nr_attrs == 1) {
5710                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5711                 if (unlikely(!p))
5712                         goto out_overflow;
5713         }
5714         return 0;
5715 out_overflow:
5716         print_overflow_msg(__func__, xdr);
5717         return -EIO;
5718 }
5719
5720 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5721 {
5722         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5723 }
5724
5725 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5726                                 struct nfs41_bind_conn_to_session_res *res)
5727 {
5728         __be32 *p;
5729         int status;
5730
5731         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5732         if (!status)
5733                 status = decode_sessionid(xdr, &res->sessionid);
5734         if (unlikely(status))
5735                 return status;
5736
5737         /* dir flags, rdma mode bool */
5738         p = xdr_inline_decode(xdr, 8);
5739         if (unlikely(!p))
5740                 goto out_overflow;
5741
5742         res->dir = be32_to_cpup(p++);
5743         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5744                 return -EIO;
5745         if (be32_to_cpup(p) == 0)
5746                 res->use_conn_in_rdma_mode = false;
5747         else
5748                 res->use_conn_in_rdma_mode = true;
5749
5750         return 0;
5751 out_overflow:
5752         print_overflow_msg(__func__, xdr);
5753         return -EIO;
5754 }
5755
5756 static int decode_create_session(struct xdr_stream *xdr,
5757                                  struct nfs41_create_session_res *res)
5758 {
5759         __be32 *p;
5760         int status;
5761
5762         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5763         if (!status)
5764                 status = decode_sessionid(xdr, &res->sessionid);
5765         if (unlikely(status))
5766                 return status;
5767
5768         /* seqid, flags */
5769         p = xdr_inline_decode(xdr, 8);
5770         if (unlikely(!p))
5771                 goto out_overflow;
5772         res->seqid = be32_to_cpup(p++);
5773         res->flags = be32_to_cpup(p);
5774
5775         /* Channel attributes */
5776         status = decode_chan_attrs(xdr, &res->fc_attrs);
5777         if (!status)
5778                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5779         return status;
5780 out_overflow:
5781         print_overflow_msg(__func__, xdr);
5782         return -EIO;
5783 }
5784
5785 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5786 {
5787         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5788 }
5789
5790 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5791 {
5792         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5793 }
5794
5795 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5796 {
5797         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5798 }
5799 #endif /* CONFIG_NFS_V4_1 */
5800
5801 static int decode_sequence(struct xdr_stream *xdr,
5802                            struct nfs4_sequence_res *res,
5803                            struct rpc_rqst *rqstp)
5804 {
5805 #if defined(CONFIG_NFS_V4_1)
5806         struct nfs4_session *session;
5807         struct nfs4_sessionid id;
5808         u32 dummy;
5809         int status;
5810         __be32 *p;
5811
5812         if (res->sr_slot == NULL)
5813                 return 0;
5814         if (!res->sr_slot->table->session)
5815                 return 0;
5816
5817         status = decode_op_hdr(xdr, OP_SEQUENCE);
5818         if (!status)
5819                 status = decode_sessionid(xdr, &id);
5820         if (unlikely(status))
5821                 goto out_err;
5822
5823         /*
5824          * If the server returns different values for sessionID, slotID or
5825          * sequence number, the server is looney tunes.
5826          */
5827         status = -EREMOTEIO;
5828         session = res->sr_slot->table->session;
5829
5830         if (memcmp(id.data, session->sess_id.data,
5831                    NFS4_MAX_SESSIONID_LEN)) {
5832                 dprintk("%s Invalid session id\n", __func__);
5833                 goto out_err;
5834         }
5835
5836         p = xdr_inline_decode(xdr, 20);
5837         if (unlikely(!p))
5838                 goto out_overflow;
5839
5840         /* seqid */
5841         dummy = be32_to_cpup(p++);
5842         if (dummy != res->sr_slot->seq_nr) {
5843                 dprintk("%s Invalid sequence number\n", __func__);
5844                 goto out_err;
5845         }
5846         /* slot id */
5847         dummy = be32_to_cpup(p++);
5848         if (dummy != res->sr_slot->slot_nr) {
5849                 dprintk("%s Invalid slot id\n", __func__);
5850                 goto out_err;
5851         }
5852         /* highest slot id */
5853         res->sr_highest_slotid = be32_to_cpup(p++);
5854         /* target highest slot id */
5855         res->sr_target_highest_slotid = be32_to_cpup(p++);
5856         /* result flags */
5857         res->sr_status_flags = be32_to_cpup(p);
5858         status = 0;
5859 out_err:
5860         res->sr_status = status;
5861         return status;
5862 out_overflow:
5863         print_overflow_msg(__func__, xdr);
5864         status = -EIO;
5865         goto out_err;
5866 #else  /* CONFIG_NFS_V4_1 */
5867         return 0;
5868 #endif /* CONFIG_NFS_V4_1 */
5869 }
5870
5871 #if defined(CONFIG_NFS_V4_1)
5872 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5873 {
5874         stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5875         return decode_stateid(xdr, stateid);
5876 }
5877
5878 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5879                                 struct nfs4_getdeviceinfo_res *res)
5880 {
5881         struct pnfs_device *pdev = res->pdev;
5882         __be32 *p;
5883         uint32_t len, type;
5884         int status;
5885
5886         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5887         if (status) {
5888                 if (status == -ETOOSMALL) {
5889                         p = xdr_inline_decode(xdr, 4);
5890                         if (unlikely(!p))
5891                                 goto out_overflow;
5892                         pdev->mincount = be32_to_cpup(p);
5893                         dprintk("%s: Min count too small. mincnt = %u\n",
5894                                 __func__, pdev->mincount);
5895                 }
5896                 return status;
5897         }
5898
5899         p = xdr_inline_decode(xdr, 8);
5900         if (unlikely(!p))
5901                 goto out_overflow;
5902         type = be32_to_cpup(p++);
5903         if (type != pdev->layout_type) {
5904                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5905                         __func__, pdev->layout_type, type);
5906                 return -EINVAL;
5907         }
5908         /*
5909          * Get the length of the opaque device_addr4. xdr_read_pages places
5910          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5911          * and places the remaining xdr data in xdr_buf->tail
5912          */
5913         pdev->mincount = be32_to_cpup(p);
5914         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5915                 goto out_overflow;
5916
5917         /* Parse notification bitmap, verifying that it is zero. */
5918         p = xdr_inline_decode(xdr, 4);
5919         if (unlikely(!p))
5920                 goto out_overflow;
5921         len = be32_to_cpup(p);
5922         if (len) {
5923                 uint32_t i;
5924
5925                 p = xdr_inline_decode(xdr, 4 * len);
5926                 if (unlikely(!p))
5927                         goto out_overflow;
5928
5929                 res->notification = be32_to_cpup(p++);
5930                 for (i = 1; i < len; i++) {
5931                         if (be32_to_cpup(p++)) {
5932                                 dprintk("%s: unsupported notification\n",
5933                                         __func__);
5934                                 return -EIO;
5935                         }
5936                 }
5937         }
5938         return 0;
5939 out_overflow:
5940         print_overflow_msg(__func__, xdr);
5941         return -EIO;
5942 }
5943
5944 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5945                             struct nfs4_layoutget_res *res)
5946 {
5947         __be32 *p;
5948         int status;
5949         u32 layout_count;
5950         u32 recvd;
5951
5952         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5953         if (status)
5954                 return status;
5955         p = xdr_inline_decode(xdr, 4);
5956         if (unlikely(!p))
5957                 goto out_overflow;
5958         res->return_on_close = be32_to_cpup(p);
5959         decode_layout_stateid(xdr, &res->stateid);
5960         p = xdr_inline_decode(xdr, 4);
5961         if (unlikely(!p))
5962                 goto out_overflow;
5963         layout_count = be32_to_cpup(p);
5964         if (!layout_count) {
5965                 dprintk("%s: server responded with empty layout array\n",
5966                         __func__);
5967                 return -EINVAL;
5968         }
5969
5970         p = xdr_inline_decode(xdr, 28);
5971         if (unlikely(!p))
5972                 goto out_overflow;
5973         p = xdr_decode_hyper(p, &res->range.offset);
5974         p = xdr_decode_hyper(p, &res->range.length);
5975         res->range.iomode = be32_to_cpup(p++);
5976         res->type = be32_to_cpup(p++);
5977         res->layoutp->len = be32_to_cpup(p);
5978
5979         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5980                 __func__,
5981                 (unsigned long)res->range.offset,
5982                 (unsigned long)res->range.length,
5983                 res->range.iomode,
5984                 res->type,
5985                 res->layoutp->len);
5986
5987         recvd = xdr_read_pages(xdr, res->layoutp->len);
5988         if (res->layoutp->len > recvd) {
5989                 dprintk("NFS: server cheating in layoutget reply: "
5990                                 "layout len %u > recvd %u\n",
5991                                 res->layoutp->len, recvd);
5992                 return -EINVAL;
5993         }
5994
5995         if (layout_count > 1) {
5996                 /* We only handle a length one array at the moment.  Any
5997                  * further entries are just ignored.  Note that this means
5998                  * the client may see a response that is less than the
5999                  * minimum it requested.
6000                  */
6001                 dprintk("%s: server responded with %d layouts, dropping tail\n",
6002                         __func__, layout_count);
6003         }
6004
6005         return 0;
6006 out_overflow:
6007         print_overflow_msg(__func__, xdr);
6008         return -EIO;
6009 }
6010
6011 static int decode_layoutreturn(struct xdr_stream *xdr,
6012                                struct nfs4_layoutreturn_res *res)
6013 {
6014         __be32 *p;
6015         int status;
6016
6017         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6018         if (status)
6019                 return status;
6020         p = xdr_inline_decode(xdr, 4);
6021         if (unlikely(!p))
6022                 goto out_overflow;
6023         res->lrs_present = be32_to_cpup(p);
6024         if (res->lrs_present)
6025                 status = decode_layout_stateid(xdr, &res->stateid);
6026         return status;
6027 out_overflow:
6028         print_overflow_msg(__func__, xdr);
6029         return -EIO;
6030 }
6031
6032 static int decode_layoutcommit(struct xdr_stream *xdr,
6033                                struct rpc_rqst *req,
6034                                struct nfs4_layoutcommit_res *res)
6035 {
6036         __be32 *p;
6037         __u32 sizechanged;
6038         int status;
6039
6040         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6041         res->status = status;
6042         if (status)
6043                 return status;
6044
6045         p = xdr_inline_decode(xdr, 4);
6046         if (unlikely(!p))
6047                 goto out_overflow;
6048         sizechanged = be32_to_cpup(p);
6049
6050         if (sizechanged) {
6051                 /* throw away new size */
6052                 p = xdr_inline_decode(xdr, 8);
6053                 if (unlikely(!p))
6054                         goto out_overflow;
6055         }
6056         return 0;
6057 out_overflow:
6058         print_overflow_msg(__func__, xdr);
6059         return -EIO;
6060 }
6061
6062 static int decode_test_stateid(struct xdr_stream *xdr,
6063                                struct nfs41_test_stateid_res *res)
6064 {
6065         __be32 *p;
6066         int status;
6067         int num_res;
6068
6069         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6070         if (status)
6071                 return status;
6072
6073         p = xdr_inline_decode(xdr, 4);
6074         if (unlikely(!p))
6075                 goto out_overflow;
6076         num_res = be32_to_cpup(p++);
6077         if (num_res != 1)
6078                 goto out;
6079
6080         p = xdr_inline_decode(xdr, 4);
6081         if (unlikely(!p))
6082                 goto out_overflow;
6083         res->status = be32_to_cpup(p++);
6084
6085         return status;
6086 out_overflow:
6087         print_overflow_msg(__func__, xdr);
6088 out:
6089         return -EIO;
6090 }
6091
6092 static int decode_free_stateid(struct xdr_stream *xdr,
6093                                struct nfs41_free_stateid_res *res)
6094 {
6095         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6096         return res->status;
6097 }
6098 #else
6099 static inline
6100 int decode_layoutreturn(struct xdr_stream *xdr,
6101                                struct nfs4_layoutreturn_res *res)
6102 {
6103         return 0;
6104 }
6105 #endif /* CONFIG_NFS_V4_1 */
6106
6107 /*
6108  * END OF "GENERIC" DECODE ROUTINES.
6109  */
6110
6111 /*
6112  * Decode OPEN_DOWNGRADE response
6113  */
6114 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6115                                        struct xdr_stream *xdr,
6116                                        struct nfs_closeres *res)
6117 {
6118         struct compound_hdr hdr;
6119         int status;
6120
6121         status = decode_compound_hdr(xdr, &hdr);
6122         if (status)
6123                 goto out;
6124         status = decode_sequence(xdr, &res->seq_res, rqstp);
6125         if (status)
6126                 goto out;
6127         status = decode_putfh(xdr);
6128         if (status)
6129                 goto out;
6130         if (res->lr_res) {
6131                 status = decode_layoutreturn(xdr, res->lr_res);
6132                 res->lr_ret = status;
6133                 if (status)
6134                         goto out;
6135         }
6136         status = decode_open_downgrade(xdr, res);
6137 out:
6138         return status;
6139 }
6140
6141 /*
6142  * Decode ACCESS response
6143  */
6144 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6145                                struct nfs4_accessres *res)
6146 {
6147         struct compound_hdr hdr;
6148         int status;
6149
6150         status = decode_compound_hdr(xdr, &hdr);
6151         if (status)
6152                 goto out;
6153         status = decode_sequence(xdr, &res->seq_res, rqstp);
6154         if (status)
6155                 goto out;
6156         status = decode_putfh(xdr);
6157         if (status != 0)
6158                 goto out;
6159         status = decode_access(xdr, &res->supported, &res->access);
6160         if (status != 0)
6161                 goto out;
6162         decode_getfattr(xdr, res->fattr, res->server);
6163 out:
6164         return status;
6165 }
6166
6167 /*
6168  * Decode LOOKUP response
6169  */
6170 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6171                                struct nfs4_lookup_res *res)
6172 {
6173         struct compound_hdr hdr;
6174         int status;
6175
6176         status = decode_compound_hdr(xdr, &hdr);
6177         if (status)
6178                 goto out;
6179         status = decode_sequence(xdr, &res->seq_res, rqstp);
6180         if (status)
6181                 goto out;
6182         status = decode_putfh(xdr);
6183         if (status)
6184                 goto out;
6185         status = decode_lookup(xdr);
6186         if (status)
6187                 goto out;
6188         status = decode_getfh(xdr, res->fh);
6189         if (status)
6190                 goto out;
6191         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6192 out:
6193         return status;
6194 }
6195
6196 /*
6197  * Decode LOOKUP_ROOT response
6198  */
6199 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6200                                     struct xdr_stream *xdr,
6201                                     struct nfs4_lookup_res *res)
6202 {
6203         struct compound_hdr hdr;
6204         int status;
6205
6206         status = decode_compound_hdr(xdr, &hdr);
6207         if (status)
6208                 goto out;
6209         status = decode_sequence(xdr, &res->seq_res, rqstp);
6210         if (status)
6211                 goto out;
6212         status = decode_putrootfh(xdr);
6213         if (status)
6214                 goto out;
6215         status = decode_getfh(xdr, res->fh);
6216         if (status == 0)
6217                 status = decode_getfattr_label(xdr, res->fattr,
6218                                                 res->label, res->server);
6219 out:
6220         return status;
6221 }
6222
6223 /*
6224  * Decode REMOVE response
6225  */
6226 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227                                struct nfs_removeres *res)
6228 {
6229         struct compound_hdr hdr;
6230         int status;
6231
6232         status = decode_compound_hdr(xdr, &hdr);
6233         if (status)
6234                 goto out;
6235         status = decode_sequence(xdr, &res->seq_res, rqstp);
6236         if (status)
6237                 goto out;
6238         status = decode_putfh(xdr);
6239         if (status)
6240                 goto out;
6241         status = decode_remove(xdr, &res->cinfo);
6242 out:
6243         return status;
6244 }
6245
6246 /*
6247  * Decode RENAME response
6248  */
6249 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6250                                struct nfs_renameres *res)
6251 {
6252         struct compound_hdr hdr;
6253         int status;
6254
6255         status = decode_compound_hdr(xdr, &hdr);
6256         if (status)
6257                 goto out;
6258         status = decode_sequence(xdr, &res->seq_res, rqstp);
6259         if (status)
6260                 goto out;
6261         status = decode_putfh(xdr);
6262         if (status)
6263                 goto out;
6264         status = decode_savefh(xdr);
6265         if (status)
6266                 goto out;
6267         status = decode_putfh(xdr);
6268         if (status)
6269                 goto out;
6270         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6271 out:
6272         return status;
6273 }
6274
6275 /*
6276  * Decode LINK response
6277  */
6278 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279                              struct nfs4_link_res *res)
6280 {
6281         struct compound_hdr hdr;
6282         int status;
6283
6284         status = decode_compound_hdr(xdr, &hdr);
6285         if (status)
6286                 goto out;
6287         status = decode_sequence(xdr, &res->seq_res, rqstp);
6288         if (status)
6289                 goto out;
6290         status = decode_putfh(xdr);
6291         if (status)
6292                 goto out;
6293         status = decode_savefh(xdr);
6294         if (status)
6295                 goto out;
6296         status = decode_putfh(xdr);
6297         if (status)
6298                 goto out;
6299         status = decode_link(xdr, &res->cinfo);
6300         if (status)
6301                 goto out;
6302         /*
6303          * Note order: OP_LINK leaves the directory as the current
6304          *             filehandle.
6305          */
6306         status = decode_restorefh(xdr);
6307         if (status)
6308                 goto out;
6309         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6310 out:
6311         return status;
6312 }
6313
6314 /*
6315  * Decode CREATE response
6316  */
6317 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6318                                struct nfs4_create_res *res)
6319 {
6320         struct compound_hdr hdr;
6321         int status;
6322
6323         status = decode_compound_hdr(xdr, &hdr);
6324         if (status)
6325                 goto out;
6326         status = decode_sequence(xdr, &res->seq_res, rqstp);
6327         if (status)
6328                 goto out;
6329         status = decode_putfh(xdr);
6330         if (status)
6331                 goto out;
6332         status = decode_create(xdr, &res->dir_cinfo);
6333         if (status)
6334                 goto out;
6335         status = decode_getfh(xdr, res->fh);
6336         if (status)
6337                 goto out;
6338         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6339 out:
6340         return status;
6341 }
6342
6343 /*
6344  * Decode SYMLINK response
6345  */
6346 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347                                 struct nfs4_create_res *res)
6348 {
6349         return nfs4_xdr_dec_create(rqstp, xdr, res);
6350 }
6351
6352 /*
6353  * Decode GETATTR response
6354  */
6355 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6356                                 struct nfs4_getattr_res *res)
6357 {
6358         struct compound_hdr hdr;
6359         int status;
6360
6361         status = decode_compound_hdr(xdr, &hdr);
6362         if (status)
6363                 goto out;
6364         status = decode_sequence(xdr, &res->seq_res, rqstp);
6365         if (status)
6366                 goto out;
6367         status = decode_putfh(xdr);
6368         if (status)
6369                 goto out;
6370         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6371 out:
6372         return status;
6373 }
6374
6375 /*
6376  * Encode an SETACL request
6377  */
6378 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6379                                 struct nfs_setaclargs *args)
6380 {
6381         struct compound_hdr hdr = {
6382                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6383         };
6384
6385         encode_compound_hdr(xdr, req, &hdr);
6386         encode_sequence(xdr, &args->seq_args, &hdr);
6387         encode_putfh(xdr, args->fh, &hdr);
6388         encode_setacl(xdr, args, &hdr);
6389         encode_nops(&hdr);
6390 }
6391
6392 /*
6393  * Decode SETACL response
6394  */
6395 static int
6396 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6397                     struct nfs_setaclres *res)
6398 {
6399         struct compound_hdr hdr;
6400         int status;
6401
6402         status = decode_compound_hdr(xdr, &hdr);
6403         if (status)
6404                 goto out;
6405         status = decode_sequence(xdr, &res->seq_res, rqstp);
6406         if (status)
6407                 goto out;
6408         status = decode_putfh(xdr);
6409         if (status)
6410                 goto out;
6411         status = decode_setattr(xdr);
6412 out:
6413         return status;
6414 }
6415
6416 /*
6417  * Decode GETACL response
6418  */
6419 static int
6420 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6421                     struct nfs_getaclres *res)
6422 {
6423         struct compound_hdr hdr;
6424         int status;
6425
6426         if (res->acl_scratch != NULL) {
6427                 void *p = page_address(res->acl_scratch);
6428                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6429         }
6430         status = decode_compound_hdr(xdr, &hdr);
6431         if (status)
6432                 goto out;
6433         status = decode_sequence(xdr, &res->seq_res, rqstp);
6434         if (status)
6435                 goto out;
6436         status = decode_putfh(xdr);
6437         if (status)
6438                 goto out;
6439         status = decode_getacl(xdr, rqstp, res);
6440
6441 out:
6442         return status;
6443 }
6444
6445 /*
6446  * Decode CLOSE response
6447  */
6448 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6449                               struct nfs_closeres *res)
6450 {
6451         struct compound_hdr hdr;
6452         int status;
6453
6454         status = decode_compound_hdr(xdr, &hdr);
6455         if (status)
6456                 goto out;
6457         status = decode_sequence(xdr, &res->seq_res, rqstp);
6458         if (status)
6459                 goto out;
6460         status = decode_putfh(xdr);
6461         if (status)
6462                 goto out;
6463         if (res->lr_res) {
6464                 status = decode_layoutreturn(xdr, res->lr_res);
6465                 res->lr_ret = status;
6466                 if (status)
6467                         goto out;
6468         }
6469         if (res->fattr != NULL) {
6470                 status = decode_getfattr(xdr, res->fattr, res->server);
6471                 if (status != 0)
6472                         goto out;
6473         }
6474         status = decode_close(xdr, res);
6475 out:
6476         return status;
6477 }
6478
6479 /*
6480  * Decode OPEN response
6481  */
6482 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6483                              struct nfs_openres *res)
6484 {
6485         struct compound_hdr hdr;
6486         int status;
6487
6488         status = decode_compound_hdr(xdr, &hdr);
6489         if (status)
6490                 goto out;
6491         status = decode_sequence(xdr, &res->seq_res, rqstp);
6492         if (status)
6493                 goto out;
6494         status = decode_putfh(xdr);
6495         if (status)
6496                 goto out;
6497         status = decode_open(xdr, res);
6498         if (status)
6499                 goto out;
6500         status = decode_getfh(xdr, &res->fh);
6501         if (status)
6502                 goto out;
6503         if (res->access_request)
6504                 decode_access(xdr, &res->access_supported, &res->access_result);
6505         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6506 out:
6507         return status;
6508 }
6509
6510 /*
6511  * Decode OPEN_CONFIRM response
6512  */
6513 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6514                                      struct xdr_stream *xdr,
6515                                      struct nfs_open_confirmres *res)
6516 {
6517         struct compound_hdr hdr;
6518         int status;
6519
6520         status = decode_compound_hdr(xdr, &hdr);
6521         if (status)
6522                 goto out;
6523         status = decode_putfh(xdr);
6524         if (status)
6525                 goto out;
6526         status = decode_open_confirm(xdr, res);
6527 out:
6528         return status;
6529 }
6530
6531 /*
6532  * Decode OPEN response
6533  */
6534 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6535                                     struct xdr_stream *xdr,
6536                                     struct nfs_openres *res)
6537 {
6538         struct compound_hdr hdr;
6539         int status;
6540
6541         status = decode_compound_hdr(xdr, &hdr);
6542         if (status)
6543                 goto out;
6544         status = decode_sequence(xdr, &res->seq_res, rqstp);
6545         if (status)
6546                 goto out;
6547         status = decode_putfh(xdr);
6548         if (status)
6549                 goto out;
6550         status = decode_open(xdr, res);
6551         if (status)
6552                 goto out;
6553         if (res->access_request)
6554                 decode_access(xdr, &res->access_supported, &res->access_result);
6555         decode_getfattr(xdr, res->f_attr, res->server);
6556 out:
6557         return status;
6558 }
6559
6560 /*
6561  * Decode SETATTR response
6562  */
6563 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6564                                 struct xdr_stream *xdr,
6565                                 struct nfs_setattrres *res)
6566 {
6567         struct compound_hdr hdr;
6568         int status;
6569
6570         status = decode_compound_hdr(xdr, &hdr);
6571         if (status)
6572                 goto out;
6573         status = decode_sequence(xdr, &res->seq_res, rqstp);
6574         if (status)
6575                 goto out;
6576         status = decode_putfh(xdr);
6577         if (status)
6578                 goto out;
6579         status = decode_setattr(xdr);
6580         if (status)
6581                 goto out;
6582         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6583 out:
6584         return status;
6585 }
6586
6587 /*
6588  * Decode LOCK response
6589  */
6590 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6591                              struct nfs_lock_res *res)
6592 {
6593         struct compound_hdr hdr;
6594         int status;
6595
6596         status = decode_compound_hdr(xdr, &hdr);
6597         if (status)
6598                 goto out;
6599         status = decode_sequence(xdr, &res->seq_res, rqstp);
6600         if (status)
6601                 goto out;
6602         status = decode_putfh(xdr);
6603         if (status)
6604                 goto out;
6605         status = decode_lock(xdr, res);
6606 out:
6607         return status;
6608 }
6609
6610 /*
6611  * Decode LOCKT response
6612  */
6613 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6614                               struct nfs_lockt_res *res)
6615 {
6616         struct compound_hdr hdr;
6617         int status;
6618
6619         status = decode_compound_hdr(xdr, &hdr);
6620         if (status)
6621                 goto out;
6622         status = decode_sequence(xdr, &res->seq_res, rqstp);
6623         if (status)
6624                 goto out;
6625         status = decode_putfh(xdr);
6626         if (status)
6627                 goto out;
6628         status = decode_lockt(xdr, res);
6629 out:
6630         return status;
6631 }
6632
6633 /*
6634  * Decode LOCKU response
6635  */
6636 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6637                               struct nfs_locku_res *res)
6638 {
6639         struct compound_hdr hdr;
6640         int status;
6641
6642         status = decode_compound_hdr(xdr, &hdr);
6643         if (status)
6644                 goto out;
6645         status = decode_sequence(xdr, &res->seq_res, rqstp);
6646         if (status)
6647                 goto out;
6648         status = decode_putfh(xdr);
6649         if (status)
6650                 goto out;
6651         status = decode_locku(xdr, res);
6652 out:
6653         return status;
6654 }
6655
6656 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6657                                           struct xdr_stream *xdr, void *dummy)
6658 {
6659         struct compound_hdr hdr;
6660         int status;
6661
6662         status = decode_compound_hdr(xdr, &hdr);
6663         if (!status)
6664                 status = decode_release_lockowner(xdr);
6665         return status;
6666 }
6667
6668 /*
6669  * Decode READLINK response
6670  */
6671 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6672                                  struct xdr_stream *xdr,
6673                                  struct nfs4_readlink_res *res)
6674 {
6675         struct compound_hdr hdr;
6676         int status;
6677
6678         status = decode_compound_hdr(xdr, &hdr);
6679         if (status)
6680                 goto out;
6681         status = decode_sequence(xdr, &res->seq_res, rqstp);
6682         if (status)
6683                 goto out;
6684         status = decode_putfh(xdr);
6685         if (status)
6686                 goto out;
6687         status = decode_readlink(xdr, rqstp);
6688 out:
6689         return status;
6690 }
6691
6692 /*
6693  * Decode READDIR response
6694  */
6695 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6696                                 struct nfs4_readdir_res *res)
6697 {
6698         struct compound_hdr hdr;
6699         int status;
6700
6701         status = decode_compound_hdr(xdr, &hdr);
6702         if (status)
6703                 goto out;
6704         status = decode_sequence(xdr, &res->seq_res, rqstp);
6705         if (status)
6706                 goto out;
6707         status = decode_putfh(xdr);
6708         if (status)
6709                 goto out;
6710         status = decode_readdir(xdr, rqstp, res);
6711 out:
6712         return status;
6713 }
6714
6715 /*
6716  * Decode Read response
6717  */
6718 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6719                              struct nfs_pgio_res *res)
6720 {
6721         struct compound_hdr hdr;
6722         int status;
6723
6724         status = decode_compound_hdr(xdr, &hdr);
6725         res->op_status = hdr.status;
6726         if (status)
6727                 goto out;
6728         status = decode_sequence(xdr, &res->seq_res, rqstp);
6729         if (status)
6730                 goto out;
6731         status = decode_putfh(xdr);
6732         if (status)
6733                 goto out;
6734         status = decode_read(xdr, rqstp, res);
6735         if (!status)
6736                 status = res->count;
6737 out:
6738         return status;
6739 }
6740
6741 /*
6742  * Decode WRITE response
6743  */
6744 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6745                               struct nfs_pgio_res *res)
6746 {
6747         struct compound_hdr hdr;
6748         int status;
6749
6750         status = decode_compound_hdr(xdr, &hdr);
6751         res->op_status = hdr.status;
6752         if (status)
6753                 goto out;
6754         status = decode_sequence(xdr, &res->seq_res, rqstp);
6755         if (status)
6756                 goto out;
6757         status = decode_putfh(xdr);
6758         if (status)
6759                 goto out;
6760         status = decode_write(xdr, res);
6761         if (status)
6762                 goto out;
6763         if (res->fattr)
6764                 decode_getfattr(xdr, res->fattr, res->server);
6765         if (!status)
6766                 status = res->count;
6767 out:
6768         return status;
6769 }
6770
6771 /*
6772  * Decode COMMIT response
6773  */
6774 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775                                struct nfs_commitres *res)
6776 {
6777         struct compound_hdr hdr;
6778         int status;
6779
6780         status = decode_compound_hdr(xdr, &hdr);
6781         res->op_status = hdr.status;
6782         if (status)
6783                 goto out;
6784         status = decode_sequence(xdr, &res->seq_res, rqstp);
6785         if (status)
6786                 goto out;
6787         status = decode_putfh(xdr);
6788         if (status)
6789                 goto out;
6790         status = decode_commit(xdr, res);
6791 out:
6792         return status;
6793 }
6794
6795 /*
6796  * Decode FSINFO response
6797  */
6798 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6799                                struct nfs4_fsinfo_res *res)
6800 {
6801         struct compound_hdr hdr;
6802         int status;
6803
6804         status = decode_compound_hdr(xdr, &hdr);
6805         if (!status)
6806                 status = decode_sequence(xdr, &res->seq_res, req);
6807         if (!status)
6808                 status = decode_putfh(xdr);
6809         if (!status)
6810                 status = decode_fsinfo(xdr, res->fsinfo);
6811         return status;
6812 }
6813
6814 /*
6815  * Decode PATHCONF response
6816  */
6817 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6818                                  struct nfs4_pathconf_res *res)
6819 {
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         if (!status)
6825                 status = decode_sequence(xdr, &res->seq_res, req);
6826         if (!status)
6827                 status = decode_putfh(xdr);
6828         if (!status)
6829                 status = decode_pathconf(xdr, res->pathconf);
6830         return status;
6831 }
6832
6833 /*
6834  * Decode STATFS response
6835  */
6836 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6837                                struct nfs4_statfs_res *res)
6838 {
6839         struct compound_hdr hdr;
6840         int status;
6841
6842         status = decode_compound_hdr(xdr, &hdr);
6843         if (!status)
6844                 status = decode_sequence(xdr, &res->seq_res, req);
6845         if (!status)
6846                 status = decode_putfh(xdr);
6847         if (!status)
6848                 status = decode_statfs(xdr, res->fsstat);
6849         return status;
6850 }
6851
6852 /*
6853  * Decode GETATTR_BITMAP response
6854  */
6855 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6856                                     struct xdr_stream *xdr,
6857                                     struct nfs4_server_caps_res *res)
6858 {
6859         struct compound_hdr hdr;
6860         int status;
6861
6862         status = decode_compound_hdr(xdr, &hdr);
6863         if (status)
6864                 goto out;
6865         status = decode_sequence(xdr, &res->seq_res, req);
6866         if (status)
6867                 goto out;
6868         status = decode_putfh(xdr);
6869         if (status)
6870                 goto out;
6871         status = decode_server_caps(xdr, res);
6872 out:
6873         return status;
6874 }
6875
6876 /*
6877  * Decode RENEW response
6878  */
6879 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6880                               void *__unused)
6881 {
6882         struct compound_hdr hdr;
6883         int status;
6884
6885         status = decode_compound_hdr(xdr, &hdr);
6886         if (!status)
6887                 status = decode_renew(xdr);
6888         return status;
6889 }
6890
6891 /*
6892  * Decode SETCLIENTID response
6893  */
6894 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6895                                     struct xdr_stream *xdr,
6896                                     struct nfs4_setclientid_res *res)
6897 {
6898         struct compound_hdr hdr;
6899         int status;
6900
6901         status = decode_compound_hdr(xdr, &hdr);
6902         if (!status)
6903                 status = decode_setclientid(xdr, res);
6904         return status;
6905 }
6906
6907 /*
6908  * Decode SETCLIENTID_CONFIRM response
6909  */
6910 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6911                                             struct xdr_stream *xdr)
6912 {
6913         struct compound_hdr hdr;
6914         int status;
6915
6916         status = decode_compound_hdr(xdr, &hdr);
6917         if (!status)
6918                 status = decode_setclientid_confirm(xdr);
6919         return status;
6920 }
6921
6922 /*
6923  * Decode DELEGRETURN response
6924  */
6925 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6926                                     struct xdr_stream *xdr,
6927                                     struct nfs4_delegreturnres *res)
6928 {
6929         struct compound_hdr hdr;
6930         int status;
6931
6932         status = decode_compound_hdr(xdr, &hdr);
6933         if (status)
6934                 goto out;
6935         status = decode_sequence(xdr, &res->seq_res, rqstp);
6936         if (status)
6937                 goto out;
6938         status = decode_putfh(xdr);
6939         if (status != 0)
6940                 goto out;
6941         if (res->lr_res) {
6942                 status = decode_layoutreturn(xdr, res->lr_res);
6943                 res->lr_ret = status;
6944                 if (status)
6945                         goto out;
6946         }
6947         if (res->fattr) {
6948                 status = decode_getfattr(xdr, res->fattr, res->server);
6949                 if (status != 0)
6950                         goto out;
6951         }
6952         status = decode_delegreturn(xdr);
6953 out:
6954         return status;
6955 }
6956
6957 /*
6958  * Decode FS_LOCATIONS response
6959  */
6960 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6961                                      struct xdr_stream *xdr,
6962                                      struct nfs4_fs_locations_res *res)
6963 {
6964         struct compound_hdr hdr;
6965         int status;
6966
6967         status = decode_compound_hdr(xdr, &hdr);
6968         if (status)
6969                 goto out;
6970         status = decode_sequence(xdr, &res->seq_res, req);
6971         if (status)
6972                 goto out;
6973         status = decode_putfh(xdr);
6974         if (status)
6975                 goto out;
6976         if (res->migration) {
6977                 xdr_enter_page(xdr, PAGE_SIZE);
6978                 status = decode_getfattr_generic(xdr,
6979                                         &res->fs_locations->fattr,
6980                                          NULL, res->fs_locations,
6981                                          NULL, res->fs_locations->server);
6982                 if (status)
6983                         goto out;
6984                 if (res->renew)
6985                         status = decode_renew(xdr);
6986         } else {
6987                 status = decode_lookup(xdr);
6988                 if (status)
6989                         goto out;
6990                 xdr_enter_page(xdr, PAGE_SIZE);
6991                 status = decode_getfattr_generic(xdr,
6992                                         &res->fs_locations->fattr,
6993                                          NULL, res->fs_locations,
6994                                          NULL, res->fs_locations->server);
6995         }
6996 out:
6997         return status;
6998 }
6999
7000 /*
7001  * Decode SECINFO response
7002  */
7003 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7004                                 struct xdr_stream *xdr,
7005                                 struct nfs4_secinfo_res *res)
7006 {
7007         struct compound_hdr hdr;
7008         int status;
7009
7010         status = decode_compound_hdr(xdr, &hdr);
7011         if (status)
7012                 goto out;
7013         status = decode_sequence(xdr, &res->seq_res, rqstp);
7014         if (status)
7015                 goto out;
7016         status = decode_putfh(xdr);
7017         if (status)
7018                 goto out;
7019         status = decode_secinfo(xdr, res);
7020 out:
7021         return status;
7022 }
7023
7024 /*
7025  * Decode FSID_PRESENT response
7026  */
7027 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7028                                      struct xdr_stream *xdr,
7029                                      struct nfs4_fsid_present_res *res)
7030 {
7031         struct compound_hdr hdr;
7032         int status;
7033
7034         status = decode_compound_hdr(xdr, &hdr);
7035         if (status)
7036                 goto out;
7037         status = decode_sequence(xdr, &res->seq_res, rqstp);
7038         if (status)
7039                 goto out;
7040         status = decode_putfh(xdr);
7041         if (status)
7042                 goto out;
7043         status = decode_getfh(xdr, res->fh);
7044         if (status)
7045                 goto out;
7046         if (res->renew)
7047                 status = decode_renew(xdr);
7048 out:
7049         return status;
7050 }
7051
7052 #if defined(CONFIG_NFS_V4_1)
7053 /*
7054  * Decode BIND_CONN_TO_SESSION response
7055  */
7056 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7057                                         struct xdr_stream *xdr,
7058                                         void *res)
7059 {
7060         struct compound_hdr hdr;
7061         int status;
7062
7063         status = decode_compound_hdr(xdr, &hdr);
7064         if (!status)
7065                 status = decode_bind_conn_to_session(xdr, res);
7066         return status;
7067 }
7068
7069 /*
7070  * Decode EXCHANGE_ID response
7071  */
7072 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7073                                     struct xdr_stream *xdr,
7074                                     void *res)
7075 {
7076         struct compound_hdr hdr;
7077         int status;
7078
7079         status = decode_compound_hdr(xdr, &hdr);
7080         if (!status)
7081                 status = decode_exchange_id(xdr, res);
7082         return status;
7083 }
7084
7085 /*
7086  * Decode CREATE_SESSION response
7087  */
7088 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7089                                        struct xdr_stream *xdr,
7090                                        struct nfs41_create_session_res *res)
7091 {
7092         struct compound_hdr hdr;
7093         int status;
7094
7095         status = decode_compound_hdr(xdr, &hdr);
7096         if (!status)
7097                 status = decode_create_session(xdr, res);
7098         return status;
7099 }
7100
7101 /*
7102  * Decode DESTROY_SESSION response
7103  */
7104 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7105                                         struct xdr_stream *xdr,
7106                                         void *res)
7107 {
7108         struct compound_hdr hdr;
7109         int status;
7110
7111         status = decode_compound_hdr(xdr, &hdr);
7112         if (!status)
7113                 status = decode_destroy_session(xdr, res);
7114         return status;
7115 }
7116
7117 /*
7118  * Decode DESTROY_CLIENTID response
7119  */
7120 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7121                                         struct xdr_stream *xdr,
7122                                         void *res)
7123 {
7124         struct compound_hdr hdr;
7125         int status;
7126
7127         status = decode_compound_hdr(xdr, &hdr);
7128         if (!status)
7129                 status = decode_destroy_clientid(xdr, res);
7130         return status;
7131 }
7132
7133 /*
7134  * Decode SEQUENCE response
7135  */
7136 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7137                                  struct xdr_stream *xdr,
7138                                  struct nfs4_sequence_res *res)
7139 {
7140         struct compound_hdr hdr;
7141         int status;
7142
7143         status = decode_compound_hdr(xdr, &hdr);
7144         if (!status)
7145                 status = decode_sequence(xdr, res, rqstp);
7146         return status;
7147 }
7148
7149 /*
7150  * Decode GET_LEASE_TIME response
7151  */
7152 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7153                                        struct xdr_stream *xdr,
7154                                        struct nfs4_get_lease_time_res *res)
7155 {
7156         struct compound_hdr hdr;
7157         int status;
7158
7159         status = decode_compound_hdr(xdr, &hdr);
7160         if (!status)
7161                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7162         if (!status)
7163                 status = decode_putrootfh(xdr);
7164         if (!status)
7165                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7166         return status;
7167 }
7168
7169 /*
7170  * Decode RECLAIM_COMPLETE response
7171  */
7172 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7173                                          struct xdr_stream *xdr,
7174                                          struct nfs41_reclaim_complete_res *res)
7175 {
7176         struct compound_hdr hdr;
7177         int status;
7178
7179         status = decode_compound_hdr(xdr, &hdr);
7180         if (!status)
7181                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7182         if (!status)
7183                 status = decode_reclaim_complete(xdr, NULL);
7184         return status;
7185 }
7186
7187 /*
7188  * Decode GETDEVINFO response
7189  */
7190 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7191                                       struct xdr_stream *xdr,
7192                                       struct nfs4_getdeviceinfo_res *res)
7193 {
7194         struct compound_hdr hdr;
7195         int status;
7196
7197         status = decode_compound_hdr(xdr, &hdr);
7198         if (status != 0)
7199                 goto out;
7200         status = decode_sequence(xdr, &res->seq_res, rqstp);
7201         if (status != 0)
7202                 goto out;
7203         status = decode_getdeviceinfo(xdr, res);
7204 out:
7205         return status;
7206 }
7207
7208 /*
7209  * Decode LAYOUTGET response
7210  */
7211 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7212                                   struct xdr_stream *xdr,
7213                                   struct nfs4_layoutget_res *res)
7214 {
7215         struct compound_hdr hdr;
7216         int status;
7217
7218         status = decode_compound_hdr(xdr, &hdr);
7219         if (status)
7220                 goto out;
7221         status = decode_sequence(xdr, &res->seq_res, rqstp);
7222         if (status)
7223                 goto out;
7224         status = decode_putfh(xdr);
7225         if (status)
7226                 goto out;
7227         status = decode_layoutget(xdr, rqstp, res);
7228 out:
7229         return status;
7230 }
7231
7232 /*
7233  * Decode LAYOUTRETURN response
7234  */
7235 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7236                                      struct xdr_stream *xdr,
7237                                      struct nfs4_layoutreturn_res *res)
7238 {
7239         struct compound_hdr hdr;
7240         int status;
7241
7242         status = decode_compound_hdr(xdr, &hdr);
7243         if (status)
7244                 goto out;
7245         status = decode_sequence(xdr, &res->seq_res, rqstp);
7246         if (status)
7247                 goto out;
7248         status = decode_putfh(xdr);
7249         if (status)
7250                 goto out;
7251         status = decode_layoutreturn(xdr, res);
7252 out:
7253         return status;
7254 }
7255
7256 /*
7257  * Decode LAYOUTCOMMIT response
7258  */
7259 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7260                                      struct xdr_stream *xdr,
7261                                      struct nfs4_layoutcommit_res *res)
7262 {
7263         struct compound_hdr hdr;
7264         int status;
7265
7266         status = decode_compound_hdr(xdr, &hdr);
7267         if (status)
7268                 goto out;
7269         status = decode_sequence(xdr, &res->seq_res, rqstp);
7270         if (status)
7271                 goto out;
7272         status = decode_putfh(xdr);
7273         if (status)
7274                 goto out;
7275         status = decode_layoutcommit(xdr, rqstp, res);
7276         if (status)
7277                 goto out;
7278         decode_getfattr(xdr, res->fattr, res->server);
7279 out:
7280         return status;
7281 }
7282
7283 /*
7284  * Decode SECINFO_NO_NAME response
7285  */
7286 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7287                                         struct xdr_stream *xdr,
7288                                         struct nfs4_secinfo_res *res)
7289 {
7290         struct compound_hdr hdr;
7291         int status;
7292
7293         status = decode_compound_hdr(xdr, &hdr);
7294         if (status)
7295                 goto out;
7296         status = decode_sequence(xdr, &res->seq_res, rqstp);
7297         if (status)
7298                 goto out;
7299         status = decode_putrootfh(xdr);
7300         if (status)
7301                 goto out;
7302         status = decode_secinfo_no_name(xdr, res);
7303 out:
7304         return status;
7305 }
7306
7307 /*
7308  * Decode TEST_STATEID response
7309  */
7310 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7311                                      struct xdr_stream *xdr,
7312                                      struct nfs41_test_stateid_res *res)
7313 {
7314         struct compound_hdr hdr;
7315         int status;
7316
7317         status = decode_compound_hdr(xdr, &hdr);
7318         if (status)
7319                 goto out;
7320         status = decode_sequence(xdr, &res->seq_res, rqstp);
7321         if (status)
7322                 goto out;
7323         status = decode_test_stateid(xdr, res);
7324 out:
7325         return status;
7326 }
7327
7328 /*
7329  * Decode FREE_STATEID response
7330  */
7331 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7332                                      struct xdr_stream *xdr,
7333                                      struct nfs41_free_stateid_res *res)
7334 {
7335         struct compound_hdr hdr;
7336         int status;
7337
7338         status = decode_compound_hdr(xdr, &hdr);
7339         if (status)
7340                 goto out;
7341         status = decode_sequence(xdr, &res->seq_res, rqstp);
7342         if (status)
7343                 goto out;
7344         status = decode_free_stateid(xdr, res);
7345 out:
7346         return status;
7347 }
7348 #endif /* CONFIG_NFS_V4_1 */
7349
7350 /**
7351  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7352  *                      the local page cache.
7353  * @xdr: XDR stream where entry resides
7354  * @entry: buffer to fill in with entry data
7355  * @plus: boolean indicating whether this should be a readdirplus entry
7356  *
7357  * Returns zero if successful, otherwise a negative errno value is
7358  * returned.
7359  *
7360  * This function is not invoked during READDIR reply decoding, but
7361  * rather whenever an application invokes the getdents(2) system call
7362  * on a directory already in our cache.
7363  */
7364 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7365                        int plus)
7366 {
7367         unsigned int savep;
7368         uint32_t bitmap[3] = {0};
7369         uint32_t len;
7370         __be32 *p = xdr_inline_decode(xdr, 4);
7371         if (unlikely(!p))
7372                 goto out_overflow;
7373         if (*p == xdr_zero) {
7374                 p = xdr_inline_decode(xdr, 4);
7375                 if (unlikely(!p))
7376                         goto out_overflow;
7377                 if (*p == xdr_zero)
7378                         return -EAGAIN;
7379                 entry->eof = 1;
7380                 return -EBADCOOKIE;
7381         }
7382
7383         p = xdr_inline_decode(xdr, 12);
7384         if (unlikely(!p))
7385                 goto out_overflow;
7386         entry->prev_cookie = entry->cookie;
7387         p = xdr_decode_hyper(p, &entry->cookie);
7388         entry->len = be32_to_cpup(p);
7389
7390         p = xdr_inline_decode(xdr, entry->len);
7391         if (unlikely(!p))
7392                 goto out_overflow;
7393         entry->name = (const char *) p;
7394
7395         /*
7396          * In case the server doesn't return an inode number,
7397          * we fake one here.  (We don't use inode number 0,
7398          * since glibc seems to choke on it...)
7399          */
7400         entry->ino = 1;
7401         entry->fattr->valid = 0;
7402
7403         if (decode_attr_bitmap(xdr, bitmap) < 0)
7404                 goto out_overflow;
7405
7406         if (decode_attr_length(xdr, &len, &savep) < 0)
7407                 goto out_overflow;
7408
7409         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7410                         NULL, entry->label, entry->server) < 0)
7411                 goto out_overflow;
7412         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7413                 entry->ino = entry->fattr->mounted_on_fileid;
7414         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7415                 entry->ino = entry->fattr->fileid;
7416
7417         entry->d_type = DT_UNKNOWN;
7418         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7419                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7420
7421         return 0;
7422
7423 out_overflow:
7424         print_overflow_msg(__func__, xdr);
7425         return -EAGAIN;
7426 }
7427
7428 /*
7429  * We need to translate between nfs status return values and
7430  * the local errno values which may not be the same.
7431  */
7432 static struct {
7433         int stat;
7434         int errno;
7435 } nfs_errtbl[] = {
7436         { NFS4_OK,              0               },
7437         { NFS4ERR_PERM,         -EPERM          },
7438         { NFS4ERR_NOENT,        -ENOENT         },
7439         { NFS4ERR_IO,           -errno_NFSERR_IO},
7440         { NFS4ERR_NXIO,         -ENXIO          },
7441         { NFS4ERR_ACCESS,       -EACCES         },
7442         { NFS4ERR_EXIST,        -EEXIST         },
7443         { NFS4ERR_XDEV,         -EXDEV          },
7444         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7445         { NFS4ERR_ISDIR,        -EISDIR         },
7446         { NFS4ERR_INVAL,        -EINVAL         },
7447         { NFS4ERR_FBIG,         -EFBIG          },
7448         { NFS4ERR_NOSPC,        -ENOSPC         },
7449         { NFS4ERR_ROFS,         -EROFS          },
7450         { NFS4ERR_MLINK,        -EMLINK         },
7451         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7452         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7453         { NFS4ERR_DQUOT,        -EDQUOT         },
7454         { NFS4ERR_STALE,        -ESTALE         },
7455         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7456         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7457         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7458         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7459         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7460         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7461         { NFS4ERR_LOCKED,       -EAGAIN         },
7462         { NFS4ERR_SYMLINK,      -ELOOP          },
7463         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7464         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7465         { -1,                   -EIO            }
7466 };
7467
7468 /*
7469  * Convert an NFS error code to a local one.
7470  * This one is used jointly by NFSv2 and NFSv3.
7471  */
7472 static int
7473 nfs4_stat_to_errno(int stat)
7474 {
7475         int i;
7476         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7477                 if (nfs_errtbl[i].stat == stat)
7478                         return nfs_errtbl[i].errno;
7479         }
7480         if (stat <= 10000 || stat > 10100) {
7481                 /* The server is looney tunes. */
7482                 return -EREMOTEIO;
7483         }
7484         /* If we cannot translate the error, the recovery routines should
7485          * handle it.
7486          * Note: remaining NFSv4 error codes have values > 10000, so should
7487          * not conflict with native Linux error codes.
7488          */
7489         return -stat;
7490 }
7491
7492 #ifdef CONFIG_NFS_V4_2
7493 #include "nfs42xdr.c"
7494 #endif /* CONFIG_NFS_V4_2 */
7495
7496 #define PROC(proc, argtype, restype)                            \
7497 [NFSPROC4_CLNT_##proc] = {                                      \
7498         .p_proc   = NFSPROC4_COMPOUND,                          \
7499         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7500         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7501         .p_arglen = NFS4_##argtype##_sz,                        \
7502         .p_replen = NFS4_##restype##_sz,                        \
7503         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7504         .p_name   = #proc,                                      \
7505 }
7506
7507 #define STUB(proc)              \
7508 [NFSPROC4_CLNT_##proc] = {      \
7509         .p_name = #proc,        \
7510 }
7511
7512 struct rpc_procinfo     nfs4_procedures[] = {
7513         PROC(READ,              enc_read,               dec_read),
7514         PROC(WRITE,             enc_write,              dec_write),
7515         PROC(COMMIT,            enc_commit,             dec_commit),
7516         PROC(OPEN,              enc_open,               dec_open),
7517         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7518         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7519         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7520         PROC(CLOSE,             enc_close,              dec_close),
7521         PROC(SETATTR,           enc_setattr,            dec_setattr),
7522         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7523         PROC(RENEW,             enc_renew,              dec_renew),
7524         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7525         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7526         PROC(LOCK,              enc_lock,               dec_lock),
7527         PROC(LOCKT,             enc_lockt,              dec_lockt),
7528         PROC(LOCKU,             enc_locku,              dec_locku),
7529         PROC(ACCESS,            enc_access,             dec_access),
7530         PROC(GETATTR,           enc_getattr,            dec_getattr),
7531         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7532         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7533         PROC(REMOVE,            enc_remove,             dec_remove),
7534         PROC(RENAME,            enc_rename,             dec_rename),
7535         PROC(LINK,              enc_link,               dec_link),
7536         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7537         PROC(CREATE,            enc_create,             dec_create),
7538         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7539         PROC(STATFS,            enc_statfs,             dec_statfs),
7540         PROC(READLINK,          enc_readlink,           dec_readlink),
7541         PROC(READDIR,           enc_readdir,            dec_readdir),
7542         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7543         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7544         PROC(GETACL,            enc_getacl,             dec_getacl),
7545         PROC(SETACL,            enc_setacl,             dec_setacl),
7546         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7547         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7548         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7549         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7550 #if defined(CONFIG_NFS_V4_1)
7551         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7552         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7553         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7554         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7555         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7556         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7557         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7558         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7559         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7560         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7561         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7562         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7563         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7564         STUB(GETDEVICELIST),
7565         PROC(BIND_CONN_TO_SESSION,
7566                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7567         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7568 #endif /* CONFIG_NFS_V4_1 */
7569 #ifdef CONFIG_NFS_V4_2
7570         PROC(SEEK,              enc_seek,               dec_seek),
7571         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7572         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7573         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7574         PROC(CLONE,             enc_clone,              dec_clone),
7575         PROC(COPY,              enc_copy,               dec_copy),
7576 #endif /* CONFIG_NFS_V4_2 */
7577 };
7578
7579 const struct rpc_version nfs_version4 = {
7580         .number                 = 4,
7581         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7582         .procs                  = nfs4_procedures
7583 };
7584
7585 /*
7586  * Local variables:
7587  *  c-basic-offset: 8
7588  * End:
7589  */