fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55
  56 #include "nfs4_fs.h"
  57 #include "internal.h"
  58 #include "nfs4idmap.h"
  59 #include "nfs4session.h"
  60 #include "pnfs.h"
  61 #include "netns.h"
  62
  63 #define NFSDBG_FACILITY         NFSDBG_XDR
  64
  65 /* Mapping from NFS error code to "errno" error code. */
  66 #define errno_NFSERR_IO         EIO
  67
  68 static int nfs4_stat_to_errno(int);
  69
  70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  71 #ifdef DEBUG
  72 #define NFS4_MAXTAGLEN          20
  73 #else
  74 #define NFS4_MAXTAGLEN          0
  75 #endif
  76
  77 /* lock,open owner id:
  78  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  79  */
  80 #define open_owner_id_maxsz     (1 + 2 + 1 + 1 + 2)
  81 #define lock_owner_id_maxsz     (1 + 1 + 4)
  82 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  83 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  84 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  85 #define op_encode_hdr_maxsz     (1)
  86 #define op_decode_hdr_maxsz     (2)
  87 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  88 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  89 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  90 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  91 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  92                                 (NFS4_FHSIZE >> 2))
  93 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  94 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  95 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  96 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  97 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  98                                 ((3+NFS4_FHSIZE) >> 2))
  99 #define nfs4_fattr_bitmap_maxsz 4
 100 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 101 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 102 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
 103 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 104 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
 106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
 107 #define nfs4_label_maxsz        (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
 108 #else
 109 #define nfs4_label_maxsz        0
 110 #endif
 111 /* We support only one layout type per file system */
 112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
 113 /* This is based on getfattr, which uses the most attributes: */
 114 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 115                                 3 + 3 + 3 + nfs4_owner_maxsz + \
 116                                 nfs4_group_maxsz + nfs4_label_maxsz + \
 117                                  decode_mdsthreshold_maxsz))
 118 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 119                                 nfs4_fattr_value_maxsz)
 120 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 121 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 122                                  1 + 2 + 1 + \
 123                                 nfs4_owner_maxsz + \
 124                                 nfs4_group_maxsz + \
 125                                 nfs4_label_maxsz + \
 126                                 4 + 4)
 127 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 128 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 129 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 130 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 131 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
 133  * layout types will be returned.
 134  */
 135 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + \
 136                                  nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
 137 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 138 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 139 #define encode_setclientid_maxsz \
 140                                 (op_encode_hdr_maxsz + \
 141                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 142                                 /* client name */ \
 143                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 144                                 1 /* sc_prog */ + \
 145                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 146                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 147                                 1) /* sc_cb_ident */
 148 #define decode_setclientid_maxsz \
 149                                 (op_decode_hdr_maxsz + \
 150                                 2 /* clientid */ + \
 151                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 152                                 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 153                                 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
 154 #define encode_setclientid_confirm_maxsz \
 155                                 (op_encode_hdr_maxsz + \
 156                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 157 #define decode_setclientid_confirm_maxsz \
 158                                 (op_decode_hdr_maxsz)
 159 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 160 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 161 #define encode_share_access_maxsz \
 162                                 (2)
 163 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 164 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 165 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 166 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 167                                 2 + encode_share_access_maxsz + 2 + \
 168                                 open_owner_id_maxsz + \
 169                                 encode_opentype_maxsz + \
 170                                 encode_claim_null_maxsz)
 171 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 172 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 173                                 decode_ace_maxsz)
 174 #define decode_change_info_maxsz        (5)
 175 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 176                                 decode_stateid_maxsz + \
 177                                 decode_change_info_maxsz + 1 + \
 178                                 nfs4_fattr_bitmap_maxsz + \
 179                                 decode_delegation_maxsz)
 180 #define encode_open_confirm_maxsz \
 181                                 (op_encode_hdr_maxsz + \
 182                                  encode_stateid_maxsz + 1)
 183 #define decode_open_confirm_maxsz \
 184                                 (op_decode_hdr_maxsz + \
 185                                  decode_stateid_maxsz)
 186 #define encode_open_downgrade_maxsz \
 187                                 (op_encode_hdr_maxsz + \
 188                                  encode_stateid_maxsz + 1 + \
 189                                  encode_share_access_maxsz)
 190 #define decode_open_downgrade_maxsz \
 191                                 (op_decode_hdr_maxsz + \
 192                                  decode_stateid_maxsz)
 193 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 194                                  1 + encode_stateid_maxsz)
 195 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 196                                  decode_stateid_maxsz)
 197 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 198                                  encode_stateid_maxsz + \
 199                                  encode_attrs_maxsz)
 200 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 201                                  nfs4_fattr_bitmap_maxsz)
 202 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 203                                  encode_stateid_maxsz + 3)
 204 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 205 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 206                                  2 + encode_verifier_maxsz + 5 + \
 207                                 nfs4_label_maxsz)
 208 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 209                                  decode_verifier_maxsz)
 210 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 211 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 212 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 213                                  encode_stateid_maxsz + 4)
 214 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 215                                  2 + decode_verifier_maxsz)
 216 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 217 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 218                                  decode_verifier_maxsz)
 219 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 220                                 nfs4_name_maxsz)
 221 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 222                                  decode_change_info_maxsz)
 223 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 224                                 2 * nfs4_name_maxsz)
 225 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 226                                  decode_change_info_maxsz + \
 227                                  decode_change_info_maxsz)
 228 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 229                                 nfs4_name_maxsz)
 230 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 231 #define encode_lockowner_maxsz  (7)
 232 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 233                                  7 + \
 234                                  1 + encode_stateid_maxsz + 1 + \
 235                                  encode_lockowner_maxsz)
 236 #define decode_lock_denied_maxsz \
 237                                 (8 + decode_lockowner_maxsz)
 238 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 239                                  decode_lock_denied_maxsz)
 240 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 241                                 encode_lockowner_maxsz)
 242 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 243                                  decode_lock_denied_maxsz)
 244 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 245                                  encode_stateid_maxsz + \
 246                                  4)
 247 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 248                                  decode_stateid_maxsz)
 249 #define encode_release_lockowner_maxsz \
 250                                 (op_encode_hdr_maxsz + \
 251                                  encode_lockowner_maxsz)
 252 #define decode_release_lockowner_maxsz \
 253                                 (op_decode_hdr_maxsz)
 254 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 255 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 256 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 257                                 1 + nfs4_name_maxsz + \
 258                                 1 + \
 259                                 nfs4_fattr_maxsz)
 260 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 261 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 262                                 1 + 2 + nfs4_name_maxsz + \
 263                                 encode_attrs_maxsz)
 264 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 265                                 decode_change_info_maxsz + \
 266                                 nfs4_fattr_bitmap_maxsz)
 267 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 268 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 269 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 270 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 271 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 272 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 273                                  nfs4_fattr_bitmap_maxsz + 1)
 274 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 275                                  encode_stateid_maxsz + 3)
 276 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 277 #define encode_fs_locations_maxsz \
 278                                 (encode_getattr_maxsz)
 279 #define decode_fs_locations_maxsz \
 280                                 (0)
 281 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 282 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 283
 284 #if defined(CONFIG_NFS_V4_1)
 285 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 286 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 287                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 288
 289 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 290                                 encode_verifier_maxsz + \
 291                                 1 /* co_ownerid.len */ + \
 292                                 /* eia_clientowner */ \
 293                                 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 294                                 1 /* flags */ + \
 295                                 1 /* spa_how */ + \
 296                                 /* max is SP4_MACH_CRED (for now) */ + \
 297                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 298                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 299                                 1 /* implementation id array of size 1 */ + \
 300                                 1 /* nii_domain */ + \
 301                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 302                                 1 /* nii_name */ + \
 303                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 304                                 3 /* nii_date */)
 305 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 306                                 2 /* eir_clientid */ + \
 307                                 1 /* eir_sequenceid */ + \
 308                                 1 /* eir_flags */ + \
 309                                 1 /* spr_how */ + \
 310                                   /* max is SP4_MACH_CRED (for now) */ + \
 311                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 312                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 313                                 2 /* eir_server_owner.so_minor_id */ + \
 314                                 /* eir_server_owner.so_major_id<> */ \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                 /* eir_server_scope<> */ \
 317                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 318                                 1 /* eir_server_impl_id array length */ + \
 319                                 1 /* nii_domain */ + \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                 1 /* nii_name */ + \
 322                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 323                                 3 /* nii_date */)
 324 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 325 #define decode_channel_attrs_maxsz  (6 + \
 326                                      1 /* ca_rdma_ird.len */ + \
 327                                      1 /* ca_rdma_ird */)
 328 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 329                                      2 /* csa_clientid */ + \
 330                                      1 /* csa_sequence */ + \
 331                                      1 /* csa_flags */ + \
 332                                      encode_channel_attrs_maxsz + \
 333                                      encode_channel_attrs_maxsz + \
 334                                      1 /* csa_cb_program */ + \
 335                                      1 /* csa_sec_parms.len (1) */ + \
 336                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 337                                      1 /* stamp */ + \
 338                                      1 /* machinename.len */ + \
 339                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 340                                      1 /* uid */ + \
 341                                      1 /* gid */ + \
 342                                      1 /* gids.len (0) */)
 343 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 344                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 345                                      1 /* csr_sequence */ + \
 346                                      1 /* csr_flags */ + \
 347                                      decode_channel_attrs_maxsz + \
 348                                      decode_channel_attrs_maxsz)
 349 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 350                                      /* bctsa_sessid */ \
 351                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 352                                      1 /* bctsa_dir */ + \
 353                                      1 /* bctsa_use_conn_in_rdma_mode */)
 354 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 355                                      /* bctsr_sessid */ \
 356                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 357                                      1 /* bctsr_dir */ + \
 358                                      1 /* bctsr_use_conn_in_rdma_mode */)
 359 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 360 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 361 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 362 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 363 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 364                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 365 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 366                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 367 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 368 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 369 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
 370                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
 371                                 1 /* layout type */ + \
 372                                 1 /* maxcount */ + \
 373                                 1 /* bitmap size */ + \
 374                                 1 /* notification bitmap length */ + \
 375                                 1 /* notification bitmap, word 0 */)
 376 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 377                                 1 /* layout type */ + \
 378                                 1 /* opaque devaddr4 length */ + \
 379                                   /* devaddr4 payload is read into page */ \
 380                                 1 /* notification bitmap length */ + \
 381                                 1 /* notification bitmap, word 0 */)
 382 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 383                                 encode_stateid_maxsz)
 384 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 385                                 decode_stateid_maxsz + \
 386                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 387 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 388                                 2 /* offset */ + \
 389                                 2 /* length */ + \
 390                                 1 /* reclaim */ + \
 391                                 encode_stateid_maxsz + \
 392                                 1 /* new offset (true) */ + \
 393                                 2 /* last byte written */ + \
 394                                 1 /* nt_timechanged (false) */ + \
 395                                 1 /* layoutupdate4 layout type */ + \
 396                                 1 /* layoutupdate4 opaqueue len */)
 397                                   /* the actual content of layoutupdate4 should
 398                                      be allocated by drivers and spliced in
 399                                      using xdr_write_pages */
 400 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 401 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 402                                 encode_stateid_maxsz + \
 403                                 1 + \
 404                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
 405 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
 406                                 1 + decode_stateid_maxsz)
 407 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
 408 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
 409 #define encode_test_stateid_maxsz       (op_encode_hdr_maxsz + 2 + \
 410                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 411 #define decode_test_stateid_maxsz       (op_decode_hdr_maxsz + 2 + 1)
 412 #define encode_free_stateid_maxsz       (op_encode_hdr_maxsz + 1 + \
 413                                          XDR_QUADLEN(NFS4_STATEID_SIZE))
 414 #define decode_free_stateid_maxsz       (op_decode_hdr_maxsz)
 415 #else /* CONFIG_NFS_V4_1 */
 416 #define encode_sequence_maxsz   0
 417 #define decode_sequence_maxsz   0
 418 #endif /* CONFIG_NFS_V4_1 */
 419
 420 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 421 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 422 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_read_maxsz)
 426 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_read_maxsz)
 430 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 431                                 encode_sequence_maxsz + \
 432                                 encode_putfh_maxsz + \
 433                                 encode_readlink_maxsz)
 434 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 435                                 decode_sequence_maxsz + \
 436                                 decode_putfh_maxsz + \
 437                                 decode_readlink_maxsz)
 438 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 439                                 encode_sequence_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_readdir_maxsz)
 442 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 443                                 decode_sequence_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_readdir_maxsz)
 446 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_write_maxsz + \
 450                                 encode_getattr_maxsz)
 451 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 452                                 decode_sequence_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_write_maxsz + \
 455                                 decode_getattr_maxsz)
 456 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_commit_maxsz)
 460 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 461                                 decode_sequence_maxsz + \
 462                                 decode_putfh_maxsz + \
 463                                 decode_commit_maxsz)
 464 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_open_maxsz + \
 468                                 encode_access_maxsz + \
 469                                 encode_getfh_maxsz + \
 470                                 encode_getattr_maxsz)
 471 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 472                                 decode_sequence_maxsz + \
 473                                 decode_putfh_maxsz + \
 474                                 decode_open_maxsz + \
 475                                 decode_access_maxsz + \
 476                                 decode_getfh_maxsz + \
 477                                 decode_getattr_maxsz)
 478 #define NFS4_enc_open_confirm_sz \
 479                                 (compound_encode_hdr_maxsz + \
 480                                  encode_putfh_maxsz + \
 481                                  encode_open_confirm_maxsz)
 482 #define NFS4_dec_open_confirm_sz \
 483                                 (compound_decode_hdr_maxsz + \
 484                                  decode_putfh_maxsz + \
 485                                  decode_open_confirm_maxsz)
 486 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 487                                         encode_sequence_maxsz + \
 488                                         encode_putfh_maxsz + \
 489                                         encode_open_maxsz + \
 490                                         encode_access_maxsz + \
 491                                         encode_getattr_maxsz)
 492 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 493                                         decode_sequence_maxsz + \
 494                                         decode_putfh_maxsz + \
 495                                         decode_open_maxsz + \
 496                                         decode_access_maxsz + \
 497                                         decode_getattr_maxsz)
 498 #define NFS4_enc_open_downgrade_sz \
 499                                 (compound_encode_hdr_maxsz + \
 500                                  encode_sequence_maxsz + \
 501                                  encode_putfh_maxsz + \
 502                                  encode_open_downgrade_maxsz + \
 503                                  encode_getattr_maxsz)
 504 #define NFS4_dec_open_downgrade_sz \
 505                                 (compound_decode_hdr_maxsz + \
 506                                  decode_sequence_maxsz + \
 507                                  decode_putfh_maxsz + \
 508                                  decode_open_downgrade_maxsz + \
 509                                  decode_getattr_maxsz)
 510 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 511                                  encode_sequence_maxsz + \
 512                                  encode_putfh_maxsz + \
 513                                  encode_close_maxsz + \
 514                                  encode_getattr_maxsz)
 515 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 516                                  decode_sequence_maxsz + \
 517                                  decode_putfh_maxsz + \
 518                                  decode_close_maxsz + \
 519                                  decode_getattr_maxsz)
 520 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 521                                  encode_sequence_maxsz + \
 522                                  encode_putfh_maxsz + \
 523                                  encode_setattr_maxsz + \
 524                                  encode_getattr_maxsz)
 525 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 526                                  decode_sequence_maxsz + \
 527                                  decode_putfh_maxsz + \
 528                                  decode_setattr_maxsz + \
 529                                  decode_getattr_maxsz)
 530 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 531                                 encode_sequence_maxsz + \
 532                                 encode_putfh_maxsz + \
 533                                 encode_fsinfo_maxsz)
 534 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_fsinfo_maxsz)
 538 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 539                                 encode_renew_maxsz)
 540 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 541                                 decode_renew_maxsz)
 542 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 543                                 encode_setclientid_maxsz)
 544 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 545                                 decode_setclientid_maxsz)
 546 #define NFS4_enc_setclientid_confirm_sz \
 547                                 (compound_encode_hdr_maxsz + \
 548                                 encode_setclientid_confirm_maxsz)
 549 #define NFS4_dec_setclientid_confirm_sz \
 550                                 (compound_decode_hdr_maxsz + \
 551                                 decode_setclientid_confirm_maxsz)
 552 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 553                                 encode_sequence_maxsz + \
 554                                 encode_putfh_maxsz + \
 555                                 encode_lock_maxsz)
 556 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 557                                 decode_sequence_maxsz + \
 558                                 decode_putfh_maxsz + \
 559                                 decode_lock_maxsz)
 560 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 561                                 encode_sequence_maxsz + \
 562                                 encode_putfh_maxsz + \
 563                                 encode_lockt_maxsz)
 564 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 565                                  decode_sequence_maxsz + \
 566                                  decode_putfh_maxsz + \
 567                                  decode_lockt_maxsz)
 568 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 569                                 encode_sequence_maxsz + \
 570                                 encode_putfh_maxsz + \
 571                                 encode_locku_maxsz)
 572 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 573                                 decode_sequence_maxsz + \
 574                                 decode_putfh_maxsz + \
 575                                 decode_locku_maxsz)
 576 #define NFS4_enc_release_lockowner_sz \
 577                                 (compound_encode_hdr_maxsz + \
 578                                  encode_lockowner_maxsz)
 579 #define NFS4_dec_release_lockowner_sz \
 580                                 (compound_decode_hdr_maxsz + \
 581                                  decode_lockowner_maxsz)
 582 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 583                                 encode_sequence_maxsz + \
 584                                 encode_putfh_maxsz + \
 585                                 encode_access_maxsz + \
 586                                 encode_getattr_maxsz)
 587 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 588                                 decode_sequence_maxsz + \
 589                                 decode_putfh_maxsz + \
 590                                 decode_access_maxsz + \
 591                                 decode_getattr_maxsz)
 592 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 593                                 encode_sequence_maxsz + \
 594                                 encode_putfh_maxsz + \
 595                                 encode_getattr_maxsz + \
 596                                 encode_renew_maxsz)
 597 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 598                                 decode_sequence_maxsz + \
 599                                 decode_putfh_maxsz + \
 600                                 decode_getattr_maxsz + \
 601                                 decode_renew_maxsz)
 602 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 603                                 encode_sequence_maxsz + \
 604                                 encode_putfh_maxsz + \
 605                                 encode_lookup_maxsz + \
 606                                 encode_getattr_maxsz + \
 607                                 encode_getfh_maxsz)
 608 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_lookup_maxsz + \
 612                                 decode_getattr_maxsz + \
 613                                 decode_getfh_maxsz)
 614 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 615                                 encode_sequence_maxsz + \
 616                                 encode_putrootfh_maxsz + \
 617                                 encode_getattr_maxsz + \
 618                                 encode_getfh_maxsz)
 619 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 620                                 decode_sequence_maxsz + \
 621                                 decode_putrootfh_maxsz + \
 622                                 decode_getattr_maxsz + \
 623                                 decode_getfh_maxsz)
 624 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 625                                 encode_sequence_maxsz + \
 626                                 encode_putfh_maxsz + \
 627                                 encode_remove_maxsz)
 628 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 629                                 decode_sequence_maxsz + \
 630                                 decode_putfh_maxsz + \
 631                                 decode_remove_maxsz)
 632 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 633                                 encode_sequence_maxsz + \
 634                                 encode_putfh_maxsz + \
 635                                 encode_savefh_maxsz + \
 636                                 encode_putfh_maxsz + \
 637                                 encode_rename_maxsz)
 638 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 639                                 decode_sequence_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_savefh_maxsz + \
 642                                 decode_putfh_maxsz + \
 643                                 decode_rename_maxsz)
 644 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 645                                 encode_sequence_maxsz + \
 646                                 encode_putfh_maxsz + \
 647                                 encode_savefh_maxsz + \
 648                                 encode_putfh_maxsz + \
 649                                 encode_link_maxsz + \
 650                                 encode_restorefh_maxsz + \
 651                                 encode_getattr_maxsz)
 652 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 653                                 decode_sequence_maxsz + \
 654                                 decode_putfh_maxsz + \
 655                                 decode_savefh_maxsz + \
 656                                 decode_putfh_maxsz + \
 657                                 decode_link_maxsz + \
 658                                 decode_restorefh_maxsz + \
 659                                 decode_getattr_maxsz)
 660 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 661                                 encode_sequence_maxsz + \
 662                                 encode_putfh_maxsz + \
 663                                 encode_symlink_maxsz + \
 664                                 encode_getattr_maxsz + \
 665                                 encode_getfh_maxsz)
 666 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 667                                 decode_sequence_maxsz + \
 668                                 decode_putfh_maxsz + \
 669                                 decode_symlink_maxsz + \
 670                                 decode_getattr_maxsz + \
 671                                 decode_getfh_maxsz)
 672 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 673                                 encode_sequence_maxsz + \
 674                                 encode_putfh_maxsz + \
 675                                 encode_create_maxsz + \
 676                                 encode_getfh_maxsz + \
 677                                 encode_getattr_maxsz)
 678 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 679                                 decode_sequence_maxsz + \
 680                                 decode_putfh_maxsz + \
 681                                 decode_create_maxsz + \
 682                                 decode_getfh_maxsz + \
 683                                 decode_getattr_maxsz)
 684 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 685                                 encode_sequence_maxsz + \
 686                                 encode_putfh_maxsz + \
 687                                 encode_getattr_maxsz)
 688 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 689                                 decode_sequence_maxsz + \
 690                                 decode_putfh_maxsz + \
 691                                 decode_getattr_maxsz)
 692 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 693                                 encode_sequence_maxsz + \
 694                                 encode_putfh_maxsz + \
 695                                 encode_statfs_maxsz)
 696 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 697                                 decode_sequence_maxsz + \
 698                                 decode_putfh_maxsz + \
 699                                 decode_statfs_maxsz)
 700 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 701                                 encode_sequence_maxsz + \
 702                                 encode_putfh_maxsz + \
 703                                 encode_getattr_maxsz)
 704 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 705                                 decode_sequence_maxsz + \
 706                                 decode_putfh_maxsz + \
 707                                 decode_getattr_maxsz)
 708 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 709                                 encode_sequence_maxsz + \
 710                                 encode_putfh_maxsz + \
 711                                 encode_delegreturn_maxsz + \
 712                                 encode_getattr_maxsz)
 713 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 714                                 decode_sequence_maxsz + \
 715                                 decode_delegreturn_maxsz + \
 716                                 decode_getattr_maxsz)
 717 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 718                                 encode_sequence_maxsz + \
 719                                 encode_putfh_maxsz + \
 720                                 encode_getacl_maxsz)
 721 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 722                                 decode_sequence_maxsz + \
 723                                 decode_putfh_maxsz + \
 724                                 decode_getacl_maxsz)
 725 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 726                                 encode_sequence_maxsz + \
 727                                 encode_putfh_maxsz + \
 728                                 encode_setacl_maxsz)
 729 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 730                                 decode_sequence_maxsz + \
 731                                 decode_putfh_maxsz + \
 732                                 decode_setacl_maxsz)
 733 #define NFS4_enc_fs_locations_sz \
 734                                 (compound_encode_hdr_maxsz + \
 735                                  encode_sequence_maxsz + \
 736                                  encode_putfh_maxsz + \
 737                                  encode_lookup_maxsz + \
 738                                  encode_fs_locations_maxsz + \
 739                                  encode_renew_maxsz)
 740 #define NFS4_dec_fs_locations_sz \
 741                                 (compound_decode_hdr_maxsz + \
 742                                  decode_sequence_maxsz + \
 743                                  decode_putfh_maxsz + \
 744                                  decode_lookup_maxsz + \
 745                                  decode_fs_locations_maxsz + \
 746                                  decode_renew_maxsz)
 747 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 748                                 encode_sequence_maxsz + \
 749                                 encode_putfh_maxsz + \
 750                                 encode_secinfo_maxsz)
 751 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 752                                 decode_sequence_maxsz + \
 753                                 decode_putfh_maxsz + \
 754                                 decode_secinfo_maxsz)
 755 #define NFS4_enc_fsid_present_sz \
 756                                 (compound_encode_hdr_maxsz + \
 757                                  encode_sequence_maxsz + \
 758                                  encode_putfh_maxsz + \
 759                                  encode_getfh_maxsz + \
 760                                  encode_renew_maxsz)
 761 #define NFS4_dec_fsid_present_sz \
 762                                 (compound_decode_hdr_maxsz + \
 763                                  decode_sequence_maxsz + \
 764                                  decode_putfh_maxsz + \
 765                                  decode_getfh_maxsz + \
 766                                  decode_renew_maxsz)
 767 #if defined(CONFIG_NFS_V4_1)
 768 #define NFS4_enc_bind_conn_to_session_sz \
 769                                 (compound_encode_hdr_maxsz + \
 770                                  encode_bind_conn_to_session_maxsz)
 771 #define NFS4_dec_bind_conn_to_session_sz \
 772                                 (compound_decode_hdr_maxsz + \
 773                                  decode_bind_conn_to_session_maxsz)
 774 #define NFS4_enc_exchange_id_sz \
 775                                 (compound_encode_hdr_maxsz + \
 776                                  encode_exchange_id_maxsz)
 777 #define NFS4_dec_exchange_id_sz \
 778                                 (compound_decode_hdr_maxsz + \
 779                                  decode_exchange_id_maxsz)
 780 #define NFS4_enc_create_session_sz \
 781                                 (compound_encode_hdr_maxsz + \
 782                                  encode_create_session_maxsz)
 783 #define NFS4_dec_create_session_sz \
 784                                 (compound_decode_hdr_maxsz + \
 785                                  decode_create_session_maxsz)
 786 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 787                                          encode_destroy_session_maxsz)
 788 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 789                                          decode_destroy_session_maxsz)
 790 #define NFS4_enc_destroy_clientid_sz    (compound_encode_hdr_maxsz + \
 791                                          encode_destroy_clientid_maxsz)
 792 #define NFS4_dec_destroy_clientid_sz    (compound_decode_hdr_maxsz + \
 793                                          decode_destroy_clientid_maxsz)
 794 #define NFS4_enc_sequence_sz \
 795                                 (compound_decode_hdr_maxsz + \
 796                                  encode_sequence_maxsz)
 797 #define NFS4_dec_sequence_sz \
 798                                 (compound_decode_hdr_maxsz + \
 799                                  decode_sequence_maxsz)
 800 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 801                                          encode_sequence_maxsz + \
 802                                          encode_putrootfh_maxsz + \
 803                                          encode_fsinfo_maxsz)
 804 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 805                                          decode_sequence_maxsz + \
 806                                          decode_putrootfh_maxsz + \
 807                                          decode_fsinfo_maxsz)
 808 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 809                                          encode_sequence_maxsz + \
 810                                          encode_reclaim_complete_maxsz)
 811 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 812                                          decode_sequence_maxsz + \
 813                                          decode_reclaim_complete_maxsz)
 814 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 815                                 encode_sequence_maxsz +\
 816                                 encode_getdeviceinfo_maxsz)
 817 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 818                                 decode_sequence_maxsz + \
 819                                 decode_getdeviceinfo_maxsz)
 820 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 821                                 encode_sequence_maxsz + \
 822                                 encode_putfh_maxsz +        \
 823                                 encode_layoutget_maxsz)
 824 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 825                                 decode_sequence_maxsz + \
 826                                 decode_putfh_maxsz +        \
 827                                 decode_layoutget_maxsz)
 828 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 829                                 encode_sequence_maxsz +\
 830                                 encode_putfh_maxsz + \
 831                                 encode_layoutcommit_maxsz + \
 832                                 encode_getattr_maxsz)
 833 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 834                                 decode_sequence_maxsz + \
 835                                 decode_putfh_maxsz + \
 836                                 decode_layoutcommit_maxsz + \
 837                                 decode_getattr_maxsz)
 838 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 839                                 encode_sequence_maxsz + \
 840                                 encode_putfh_maxsz + \
 841                                 encode_layoutreturn_maxsz)
 842 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 843                                 decode_sequence_maxsz + \
 844                                 decode_putfh_maxsz + \
 845                                 decode_layoutreturn_maxsz)
 846 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 847                                         encode_sequence_maxsz + \
 848                                         encode_putrootfh_maxsz +\
 849                                         encode_secinfo_no_name_maxsz)
 850 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 851                                         decode_sequence_maxsz + \
 852                                         decode_putrootfh_maxsz + \
 853                                         decode_secinfo_no_name_maxsz)
 854 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 855                                          encode_sequence_maxsz + \
 856                                          encode_test_stateid_maxsz)
 857 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 858                                          decode_sequence_maxsz + \
 859                                          decode_test_stateid_maxsz)
 860 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 861                                          encode_sequence_maxsz + \
 862                                          encode_free_stateid_maxsz)
 863 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 864                                          decode_sequence_maxsz + \
 865                                          decode_free_stateid_maxsz)
 866
 867 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 868                                       compound_encode_hdr_maxsz +
 869                                       encode_sequence_maxsz +
 870                                       encode_putfh_maxsz +
 871                                       encode_getattr_maxsz) *
 872                                      XDR_UNIT);
 873
 874 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 875                                      compound_decode_hdr_maxsz +
 876                                      decode_sequence_maxsz +
 877                                      decode_putfh_maxsz) *
 878                                     XDR_UNIT);
 879
 880 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 881                                            compound_decode_hdr_maxsz +
 882                                            decode_sequence_maxsz) *
 883                                           XDR_UNIT);
 884 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 885 #endif /* CONFIG_NFS_V4_1 */
 886
 887 static const umode_t nfs_type2fmt[] = {
 888         [NF4BAD] = 0,
 889         [NF4REG] = S_IFREG,
 890         [NF4DIR] = S_IFDIR,
 891         [NF4BLK] = S_IFBLK,
 892         [NF4CHR] = S_IFCHR,
 893         [NF4LNK] = S_IFLNK,
 894         [NF4SOCK] = S_IFSOCK,
 895         [NF4FIFO] = S_IFIFO,
 896         [NF4ATTRDIR] = 0,
 897         [NF4NAMEDATTR] = 0,
 898 };
 899
 900 struct compound_hdr {
 901         int32_t         status;
 902         uint32_t        nops;
 903         __be32 *        nops_p;
 904         uint32_t        taglen;
 905         char *          tag;
 906         uint32_t        replen;         /* expected reply words */
 907         u32             minorversion;
 908 };
 909
 910 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 911 {
 912         __be32 *p = xdr_reserve_space(xdr, nbytes);
 913         BUG_ON(!p);
 914         return p;
 915 }
 916
 917 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 918 {
 919         __be32 *p;
 920
 921         p = xdr_reserve_space(xdr, len);
 922         xdr_encode_opaque_fixed(p, buf, len);
 923 }
 924
 925 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 926 {
 927         __be32 *p;
 928
 929         p = reserve_space(xdr, 4 + len);
 930         xdr_encode_opaque(p, str, len);
 931 }
 932
 933 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 934 {
 935         __be32 *p;
 936
 937         p = reserve_space(xdr, 4);
 938         *p = cpu_to_be32(n);
 939 }
 940
 941 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 942 {
 943         __be32 *p;
 944
 945         p = reserve_space(xdr, 8);
 946         xdr_encode_hyper(p, n);
 947 }
 948
 949 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 950                 const struct nfs_seqid *seqid)
 951 {
 952         if (seqid != NULL)
 953                 encode_uint32(xdr, seqid->sequence->counter);
 954         else
 955                 encode_uint32(xdr, 0);
 956 }
 957
 958 static void encode_compound_hdr(struct xdr_stream *xdr,
 959                                 struct rpc_rqst *req,
 960                                 struct compound_hdr *hdr)
 961 {
 962         __be32 *p;
 963         struct rpc_auth *auth = req->rq_cred->cr_auth;
 964
 965         /* initialize running count of expected bytes in reply.
 966          * NOTE: the replied tag SHOULD be the same is the one sent,
 967          * but this is not required as a MUST for the server to do so. */
 968         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 969
 970         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 971         encode_string(xdr, hdr->taglen, hdr->tag);
 972         p = reserve_space(xdr, 8);
 973         *p++ = cpu_to_be32(hdr->minorversion);
 974         hdr->nops_p = p;
 975         *p = cpu_to_be32(hdr->nops);
 976 }
 977
 978 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 979                 uint32_t replen,
 980                 struct compound_hdr *hdr)
 981 {
 982         encode_uint32(xdr, op);
 983         hdr->nops++;
 984         hdr->replen += replen;
 985 }
 986
 987 static void encode_nops(struct compound_hdr *hdr)
 988 {
 989         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 990         *hdr->nops_p = htonl(hdr->nops);
 991 }
 992
 993 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 994 {
 995         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
 996 }
 997
 998 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 999 {
1000         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1001 }
1002
1003 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1004                                 const struct nfs4_label *label,
1005                                 const struct nfs_server *server,
1006                                 bool excl_check)
1007 {
1008         char owner_name[IDMAP_NAMESZ];
1009         char owner_group[IDMAP_NAMESZ];
1010         int owner_namelen = 0;
1011         int owner_grouplen = 0;
1012         __be32 *p;
1013         unsigned i;
1014         uint32_t len = 0;
1015         uint32_t bmval_len;
1016         uint32_t bmval[3] = { 0 };
1017
1018         /*
1019          * We reserve enough space to write the entire attribute buffer at once.
1020          * In the worst-case, this would be
1021          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1022          * = 40 bytes, plus any contribution from variable-length fields
1023          *            such as owner/group.
1024          */
1025         if (iap->ia_valid & ATTR_SIZE) {
1026                 bmval[0] |= FATTR4_WORD0_SIZE;
1027                 len += 8;
1028         }
1029         if (iap->ia_valid & ATTR_MODE) {
1030                 bmval[1] |= FATTR4_WORD1_MODE;
1031                 len += 4;
1032         }
1033         if (iap->ia_valid & ATTR_UID) {
1034                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035                 if (owner_namelen < 0) {
1036                         dprintk("nfs: couldn't resolve uid %d to string\n",
1037                                         from_kuid(&init_user_ns, iap->ia_uid));
1038                         /* XXX */
1039                         strcpy(owner_name, "nobody");
1040                         owner_namelen = sizeof("nobody") - 1;
1041                         /* goto out; */
1042                 }
1043                 bmval[1] |= FATTR4_WORD1_OWNER;
1044                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045         }
1046         if (iap->ia_valid & ATTR_GID) {
1047                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1048                 if (owner_grouplen < 0) {
1049                         dprintk("nfs: couldn't resolve gid %d to string\n",
1050                                         from_kgid(&init_user_ns, iap->ia_gid));
1051                         strcpy(owner_group, "nobody");
1052                         owner_grouplen = sizeof("nobody") - 1;
1053                         /* goto out; */
1054                 }
1055                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1056                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1057         }
1058         if (iap->ia_valid & ATTR_ATIME_SET) {
1059                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1060                 len += 16;
1061         } else if (iap->ia_valid & ATTR_ATIME) {
1062                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1063                 len += 4;
1064         }
1065         if (iap->ia_valid & ATTR_MTIME_SET) {
1066                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1067                 len += 16;
1068         } else if (iap->ia_valid & ATTR_MTIME) {
1069                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1070                 len += 4;
1071         }
1072
1073         if (excl_check) {
1074                 const u32 *excl_bmval = server->exclcreat_bitmask;
1075                 bmval[0] &= excl_bmval[0];
1076                 bmval[1] &= excl_bmval[1];
1077                 bmval[2] &= excl_bmval[2];
1078
1079                 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1080                         label = NULL;
1081         }
1082
1083         if (label) {
1084                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1085                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1086         }
1087
1088         if (bmval[2] != 0)
1089                 bmval_len = 3;
1090         else if (bmval[1] != 0)
1091                 bmval_len = 2;
1092         else
1093                 bmval_len = 1;
1094
1095         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1096
1097         *p++ = cpu_to_be32(bmval_len);
1098         for (i = 0; i < bmval_len; i++)
1099                 *p++ = cpu_to_be32(bmval[i]);
1100         *p++ = cpu_to_be32(len);
1101
1102         if (bmval[0] & FATTR4_WORD0_SIZE)
1103                 p = xdr_encode_hyper(p, iap->ia_size);
1104         if (bmval[1] & FATTR4_WORD1_MODE)
1105                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1106         if (bmval[1] & FATTR4_WORD1_OWNER)
1107                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1108         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1109                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1110         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1111                 if (iap->ia_valid & ATTR_ATIME_SET) {
1112                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1113                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1114                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1115                 } else
1116                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1117         }
1118         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1119                 if (iap->ia_valid & ATTR_MTIME_SET) {
1120                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1121                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1122                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1123                 } else
1124                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1125         }
1126         if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1127                 *p++ = cpu_to_be32(label->lfs);
1128                 *p++ = cpu_to_be32(label->pi);
1129                 *p++ = cpu_to_be32(label->len);
1130                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1131         }
1132
1133 /* out: */
1134 }
1135
1136 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1137 {
1138         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1139         encode_uint32(xdr, access);
1140 }
1141
1142 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1143 {
1144         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1145         encode_nfs4_seqid(xdr, arg->seqid);
1146         encode_nfs4_stateid(xdr, &arg->stateid);
1147 }
1148
1149 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1150 {
1151         __be32 *p;
1152
1153         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1154         p = reserve_space(xdr, 12);
1155         p = xdr_encode_hyper(p, args->offset);
1156         *p = cpu_to_be32(args->count);
1157 }
1158
1159 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1160 {
1161         __be32 *p;
1162
1163         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1164         encode_uint32(xdr, create->ftype);
1165
1166         switch (create->ftype) {
1167         case NF4LNK:
1168                 p = reserve_space(xdr, 4);
1169                 *p = cpu_to_be32(create->u.symlink.len);
1170                 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1171                                 create->u.symlink.len);
1172                 xdr->buf->flags |= XDRBUF_WRITE;
1173                 break;
1174
1175         case NF4BLK: case NF4CHR:
1176                 p = reserve_space(xdr, 8);
1177                 *p++ = cpu_to_be32(create->u.device.specdata1);
1178                 *p = cpu_to_be32(create->u.device.specdata2);
1179                 break;
1180
1181         default:
1182                 break;
1183         }
1184
1185         encode_string(xdr, create->name->len, create->name->name);
1186         encode_attrs(xdr, create->attrs, create->label, create->server, false);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191         __be32 *p;
1192
1193         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194         p = reserve_space(xdr, 8);
1195         *p++ = cpu_to_be32(1);
1196         *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204         p = reserve_space(xdr, 12);
1205         *p++ = cpu_to_be32(2);
1206         *p++ = cpu_to_be32(bm0);
1207         *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213                      struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218         if (bm2) {
1219                 p = reserve_space(xdr, 16);
1220                 *p++ = cpu_to_be32(3);
1221                 *p++ = cpu_to_be32(bm0);
1222                 *p++ = cpu_to_be32(bm1);
1223                 *p = cpu_to_be32(bm2);
1224         } else if (bm1) {
1225                 p = reserve_space(xdr, 12);
1226                 *p++ = cpu_to_be32(2);
1227                 *p++ = cpu_to_be32(bm0);
1228                 *p = cpu_to_be32(bm1);
1229         } else {
1230                 p = reserve_space(xdr, 8);
1231                 *p++ = cpu_to_be32(1);
1232                 *p = cpu_to_be32(bm0);
1233         }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239                            bitmask[1] & nfs4_fattr_bitmap[1],
1240                            bitmask[2] & nfs4_fattr_bitmap[2],
1241                            hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245                                  const u32 *open_bitmap,
1246                                  struct compound_hdr *hdr)
1247 {
1248         encode_getattr_three(xdr,
1249                              bitmask[0] & open_bitmap[0],
1250                              bitmask[1] & open_bitmap[1],
1251                              bitmask[2] & open_bitmap[2],
1252                              hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257         encode_getattr_three(xdr,
1258                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1259                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1260                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1261                              hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278         encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283         if (fl->fl_type == F_RDLCK)
1284                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290         if (fl->fl_end == OFFSET_MAX)
1291                 return ~(uint64_t)0;
1292         return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297         __be32 *p;
1298
1299         p = reserve_space(xdr, 32);
1300         p = xdr_encode_hyper(p, lowner->clientid);
1301         *p++ = cpu_to_be32(20);
1302         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303         *p++ = cpu_to_be32(lowner->s_dev);
1304         xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310  */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313         __be32 *p;
1314
1315         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316         p = reserve_space(xdr, 28);
1317         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318         *p++ = cpu_to_be32(args->reclaim);
1319         p = xdr_encode_hyper(p, args->fl->fl_start);
1320         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321         *p = cpu_to_be32(args->new_lock_owner);
1322         if (args->new_lock_owner){
1323                 encode_nfs4_seqid(xdr, args->open_seqid);
1324                 encode_nfs4_stateid(xdr, &args->open_stateid);
1325                 encode_nfs4_seqid(xdr, args->lock_seqid);
1326                 encode_lockowner(xdr, &args->lock_owner);
1327         }
1328         else {
1329                 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330                 encode_nfs4_seqid(xdr, args->lock_seqid);
1331         }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336         __be32 *p;
1337
1338         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339         p = reserve_space(xdr, 20);
1340         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341         p = xdr_encode_hyper(p, args->fl->fl_start);
1342         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343         encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348         __be32 *p;
1349
1350         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352         encode_nfs4_seqid(xdr, args->seqid);
1353         encode_nfs4_stateid(xdr, &args->stateid);
1354         p = reserve_space(xdr, 16);
1355         p = xdr_encode_hyper(p, args->fl->fl_start);
1356         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362         encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368         encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373         __be32 *p;
1374
1375         p = reserve_space(xdr, 8);
1376         *p++ = cpu_to_be32(share_access);
1377         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382         __be32 *p;
1383  /*
1384  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385  * owner 4 = 32
1386  */
1387         encode_nfs4_seqid(xdr, arg->seqid);
1388         encode_share_access(xdr, arg->share_access);
1389         p = reserve_space(xdr, 36);
1390         p = xdr_encode_hyper(p, arg->clientid);
1391         *p++ = cpu_to_be32(24);
1392         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393         *p++ = cpu_to_be32(arg->server->s_dev);
1394         *p++ = cpu_to_be32(arg->id.uniquifier);
1395         xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         switch(arg->createmode) {
1404         case NFS4_CREATE_UNCHECKED:
1405                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1407                 break;
1408         case NFS4_CREATE_GUARDED:
1409                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1410                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
1411                 break;
1412         case NFS4_CREATE_EXCLUSIVE:
1413                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1414                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1415                 break;
1416         case NFS4_CREATE_EXCLUSIVE4_1:
1417                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1418                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1419                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true);
1420         }
1421 }
1422
1423 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 4);
1428         switch (arg->open_flags & O_CREAT) {
1429         case 0:
1430                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1431                 break;
1432         default:
1433                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1434                 encode_createmode(xdr, arg);
1435         }
1436 }
1437
1438 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4);
1443         switch (delegation_type) {
1444         case 0:
1445                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1446                 break;
1447         case FMODE_READ:
1448                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1449                 break;
1450         case FMODE_WRITE|FMODE_READ:
1451                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1452                 break;
1453         default:
1454                 BUG();
1455         }
1456 }
1457
1458 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1459 {
1460         __be32 *p;
1461
1462         p = reserve_space(xdr, 4);
1463         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1464         encode_string(xdr, name->len, name->name);
1465 }
1466
1467 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4);
1472         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1473         encode_delegation_type(xdr, type);
1474 }
1475
1476 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1477 {
1478         __be32 *p;
1479
1480         p = reserve_space(xdr, 4);
1481         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1482         encode_nfs4_stateid(xdr, stateid);
1483         encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_fh(struct xdr_stream *xdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1492 }
1493
1494 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1495 {
1496         __be32 *p;
1497
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1500         encode_nfs4_stateid(xdr, stateid);
1501 }
1502
1503 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1504 {
1505         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1506         encode_openhdr(xdr, arg);
1507         encode_opentype(xdr, arg);
1508         switch (arg->claim) {
1509         case NFS4_OPEN_CLAIM_NULL:
1510                 encode_claim_null(xdr, arg->name);
1511                 break;
1512         case NFS4_OPEN_CLAIM_PREVIOUS:
1513                 encode_claim_previous(xdr, arg->u.delegation_type);
1514                 break;
1515         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1516                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1517                 break;
1518         case NFS4_OPEN_CLAIM_FH:
1519                 encode_claim_fh(xdr);
1520                 break;
1521         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1522                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1523                 break;
1524         default:
1525                 BUG();
1526         }
1527 }
1528
1529 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1530 {
1531         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1532         encode_nfs4_stateid(xdr, arg->stateid);
1533         encode_nfs4_seqid(xdr, arg->seqid);
1534 }
1535
1536 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1537 {
1538         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1539         encode_nfs4_stateid(xdr, &arg->stateid);
1540         encode_nfs4_seqid(xdr, arg->seqid);
1541         encode_share_access(xdr, arg->share_access);
1542 }
1543
1544 static void
1545 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1546 {
1547         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1548         encode_string(xdr, fh->size, fh->data);
1549 }
1550
1551 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1552 {
1553         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1554 }
1555
1556 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1557                         struct compound_hdr *hdr)
1558 {
1559         __be32 *p;
1560
1561         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1562         encode_nfs4_stateid(xdr, &args->stateid);
1563
1564         p = reserve_space(xdr, 12);
1565         p = xdr_encode_hyper(p, args->offset);
1566         *p = cpu_to_be32(args->count);
1567 }
1568
1569 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1570 {
1571         uint32_t attrs[3] = {
1572                 FATTR4_WORD0_RDATTR_ERROR,
1573                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1574         };
1575         uint32_t dircount = readdir->count >> 1;
1576         __be32 *p, verf[2];
1577         uint32_t attrlen = 0;
1578         unsigned int i;
1579
1580         if (readdir->plus) {
1581                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1582                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1583                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1584                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1585                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1586                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1587                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1588                 dircount >>= 1;
1589         }
1590         /* Use mounted_on_fileid only if the server supports it */
1591         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1592                 attrs[0] |= FATTR4_WORD0_FILEID;
1593         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1594                 attrs[i] &= readdir->bitmask[i];
1595                 if (attrs[i] != 0)
1596                         attrlen = i+1;
1597         }
1598
1599         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1600         encode_uint64(xdr, readdir->cookie);
1601         encode_nfs4_verifier(xdr, &readdir->verifier);
1602         p = reserve_space(xdr, 12 + (attrlen << 2));
1603         *p++ = cpu_to_be32(dircount);
1604         *p++ = cpu_to_be32(readdir->count);
1605         *p++ = cpu_to_be32(attrlen);
1606         for (i = 0; i < attrlen; i++)
1607                 *p++ = cpu_to_be32(attrs[i]);
1608         memcpy(verf, readdir->verifier.data, sizeof(verf));
1609
1610         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1611                         __func__,
1612                         (unsigned long long)readdir->cookie,
1613                         verf[0], verf[1],
1614                         attrs[0] & readdir->bitmask[0],
1615                         attrs[1] & readdir->bitmask[1],
1616                         attrs[2] & readdir->bitmask[2]);
1617 }
1618
1619 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1620 {
1621         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1622 }
1623
1624 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1625 {
1626         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1627         encode_string(xdr, name->len, name->name);
1628 }
1629
1630 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1631 {
1632         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1633         encode_string(xdr, oldname->len, oldname->name);
1634         encode_string(xdr, newname->len, newname->name);
1635 }
1636
1637 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1638                          struct compound_hdr *hdr)
1639 {
1640         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1641         encode_uint64(xdr, clid);
1642 }
1643
1644 static void
1645 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1646 {
1647         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1648 }
1649
1650 static void
1651 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1652 {
1653         __be32 *p;
1654
1655         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1656         encode_nfs4_stateid(xdr, &zero_stateid);
1657         p = reserve_space(xdr, 2*4);
1658         *p++ = cpu_to_be32(1);
1659         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1660         p = reserve_space(xdr, 4);
1661         *p = cpu_to_be32(arg->acl_len);
1662         xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1663 }
1664
1665 static void
1666 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1669 }
1670
1671 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1672 {
1673         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1674         encode_nfs4_stateid(xdr, &arg->stateid);
1675         encode_attrs(xdr, arg->iap, arg->label, server, false);
1676 }
1677
1678 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1679 {
1680         __be32 *p;
1681
1682         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1683         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1684
1685         encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1686                         setclientid->sc_clnt->cl_owner_id);
1687         p = reserve_space(xdr, 4);
1688         *p = cpu_to_be32(setclientid->sc_prog);
1689         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1690         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1691         p = reserve_space(xdr, 4);
1692         *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1693 }
1694
1695 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1696 {
1697         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1698                         decode_setclientid_confirm_maxsz, hdr);
1699         encode_uint64(xdr, arg->clientid);
1700         encode_nfs4_verifier(xdr, &arg->confirm);
1701 }
1702
1703 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1704                          struct compound_hdr *hdr)
1705 {
1706         __be32 *p;
1707
1708         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1709         encode_nfs4_stateid(xdr, &args->stateid);
1710
1711         p = reserve_space(xdr, 16);
1712         p = xdr_encode_hyper(p, args->offset);
1713         *p++ = cpu_to_be32(args->stable);
1714         *p = cpu_to_be32(args->count);
1715
1716         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1717 }
1718
1719 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1720 {
1721         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1722         encode_nfs4_stateid(xdr, stateid);
1723 }
1724
1725 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1726 {
1727         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1728         encode_string(xdr, name->len, name->name);
1729 }
1730
1731 #if defined(CONFIG_NFS_V4_1)
1732 /* NFSv4.1 operations */
1733 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1734                                    struct nfs41_bind_conn_to_session_args *args,
1735                                    struct compound_hdr *hdr)
1736 {
1737         __be32 *p;
1738
1739         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1740                 decode_bind_conn_to_session_maxsz, hdr);
1741         encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1742         p = xdr_reserve_space(xdr, 8);
1743         *p++ = cpu_to_be32(args->dir);
1744         *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1745 }
1746
1747 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1748 {
1749         unsigned int i;
1750         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1751         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1752                 encode_uint32(xdr, op_map->u.words[i]);
1753 }
1754
1755 static void encode_exchange_id(struct xdr_stream *xdr,
1756                                struct nfs41_exchange_id_args *args,
1757                                struct compound_hdr *hdr)
1758 {
1759         __be32 *p;
1760         char impl_name[IMPL_NAME_LIMIT];
1761         int len = 0;
1762
1763         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1764         encode_nfs4_verifier(xdr, args->verifier);
1765
1766         encode_string(xdr, strlen(args->client->cl_owner_id),
1767                         args->client->cl_owner_id);
1768
1769         encode_uint32(xdr, args->flags);
1770         encode_uint32(xdr, args->state_protect.how);
1771
1772         switch (args->state_protect.how) {
1773         case SP4_NONE:
1774                 break;
1775         case SP4_MACH_CRED:
1776                 encode_op_map(xdr, &args->state_protect.enforce);
1777                 encode_op_map(xdr, &args->state_protect.allow);
1778                 break;
1779         default:
1780                 WARN_ON_ONCE(1);
1781                 break;
1782         }
1783
1784         if (send_implementation_id &&
1785             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1786             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1787                 <= sizeof(impl_name) + 1)
1788                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1789                                utsname()->sysname, utsname()->release,
1790                                utsname()->version, utsname()->machine);
1791
1792         if (len > 0) {
1793                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1794
1795                 encode_string(xdr,
1796                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1797                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1798                 encode_string(xdr, len, impl_name);
1799                 /* just send zeros for nii_date - the date is in nii_name */
1800                 p = reserve_space(xdr, 12);
1801                 p = xdr_encode_hyper(p, 0);
1802                 *p = cpu_to_be32(0);
1803         } else
1804                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1805 }
1806
1807 static void encode_create_session(struct xdr_stream *xdr,
1808                                   struct nfs41_create_session_args *args,
1809                                   struct compound_hdr *hdr)
1810 {
1811         __be32 *p;
1812         struct nfs_client *clp = args->client;
1813         struct rpc_clnt *clnt = clp->cl_rpcclient;
1814         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1815         u32 max_resp_sz_cached;
1816
1817         /*
1818          * Assumes OPEN is the biggest non-idempotent compound.
1819          * 2 is the verifier.
1820          */
1821         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1822                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1823
1824         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1825         p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1826         p = xdr_encode_hyper(p, args->clientid);
1827         *p++ = cpu_to_be32(args->seqid);                        /*Sequence id */
1828         *p++ = cpu_to_be32(args->flags);                        /*flags */
1829
1830         /* Fore Channel */
1831         *p++ = cpu_to_be32(0);                          /* header padding size */
1832         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1833         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1834         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1835         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1836         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1837         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1838
1839         /* Back Channel */
1840         *p++ = cpu_to_be32(0);                          /* header padding size */
1841         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1842         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1843         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1844         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1845         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1846         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1847
1848         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1849         *p++ = cpu_to_be32(1);
1850         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1851
1852         /* authsys_parms rfc1831 */
1853         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1854         p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1855         *p++ = cpu_to_be32(0);                          /* UID */
1856         *p++ = cpu_to_be32(0);                          /* GID */
1857         *p = cpu_to_be32(0);                            /* No more gids */
1858 }
1859
1860 static void encode_destroy_session(struct xdr_stream *xdr,
1861                                    struct nfs4_session *session,
1862                                    struct compound_hdr *hdr)
1863 {
1864         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1865         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1866 }
1867
1868 static void encode_destroy_clientid(struct xdr_stream *xdr,
1869                                    uint64_t clientid,
1870                                    struct compound_hdr *hdr)
1871 {
1872         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1873         encode_uint64(xdr, clientid);
1874 }
1875
1876 static void encode_reclaim_complete(struct xdr_stream *xdr,
1877                                     struct nfs41_reclaim_complete_args *args,
1878                                     struct compound_hdr *hdr)
1879 {
1880         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1881         encode_uint32(xdr, args->one_fs);
1882 }
1883 #endif /* CONFIG_NFS_V4_1 */
1884
1885 static void encode_sequence(struct xdr_stream *xdr,
1886                             const struct nfs4_sequence_args *args,
1887                             struct compound_hdr *hdr)
1888 {
1889 #if defined(CONFIG_NFS_V4_1)
1890         struct nfs4_session *session;
1891         struct nfs4_slot_table *tp;
1892         struct nfs4_slot *slot = args->sa_slot;
1893         __be32 *p;
1894
1895         tp = slot->table;
1896         session = tp->session;
1897         if (!session)
1898                 return;
1899
1900         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1901
1902         /*
1903          * Sessionid + seqid + slotid + max slotid + cache_this
1904          */
1905         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1906                 "max_slotid=%d cache_this=%d\n",
1907                 __func__,
1908                 ((u32 *)session->sess_id.data)[0],
1909                 ((u32 *)session->sess_id.data)[1],
1910                 ((u32 *)session->sess_id.data)[2],
1911                 ((u32 *)session->sess_id.data)[3],
1912                 slot->seq_nr, slot->slot_nr,
1913                 tp->highest_used_slotid, args->sa_cache_this);
1914         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1915         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1916         *p++ = cpu_to_be32(slot->seq_nr);
1917         *p++ = cpu_to_be32(slot->slot_nr);
1918         *p++ = cpu_to_be32(tp->highest_used_slotid);
1919         *p = cpu_to_be32(args->sa_cache_this);
1920 #endif /* CONFIG_NFS_V4_1 */
1921 }
1922
1923 #ifdef CONFIG_NFS_V4_1
1924 static void
1925 encode_getdeviceinfo(struct xdr_stream *xdr,
1926                      const struct nfs4_getdeviceinfo_args *args,
1927                      struct compound_hdr *hdr)
1928 {
1929         __be32 *p;
1930
1931         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1932         p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1933         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1934                                     NFS4_DEVICEID4_SIZE);
1935         *p++ = cpu_to_be32(args->pdev->layout_type);
1936         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1937
1938         p = reserve_space(xdr, 4 + 4);
1939         *p++ = cpu_to_be32(1);                  /* bitmap length */
1940         *p++ = cpu_to_be32(args->notify_types);
1941 }
1942
1943 static void
1944 encode_layoutget(struct xdr_stream *xdr,
1945                       const struct nfs4_layoutget_args *args,
1946                       struct compound_hdr *hdr)
1947 {
1948         __be32 *p;
1949
1950         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1951         p = reserve_space(xdr, 36);
1952         *p++ = cpu_to_be32(0);     /* Signal layout available */
1953         *p++ = cpu_to_be32(args->type);
1954         *p++ = cpu_to_be32(args->range.iomode);
1955         p = xdr_encode_hyper(p, args->range.offset);
1956         p = xdr_encode_hyper(p, args->range.length);
1957         p = xdr_encode_hyper(p, args->minlength);
1958         encode_nfs4_stateid(xdr, &args->stateid);
1959         encode_uint32(xdr, args->maxcount);
1960
1961         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1962                 __func__,
1963                 args->type,
1964                 args->range.iomode,
1965                 (unsigned long)args->range.offset,
1966                 (unsigned long)args->range.length,
1967                 args->maxcount);
1968 }
1969
1970 static int
1971 encode_layoutcommit(struct xdr_stream *xdr,
1972                     struct inode *inode,
1973                     struct nfs4_layoutcommit_args *args,
1974                     struct compound_hdr *hdr)
1975 {
1976         __be32 *p;
1977
1978         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1979                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1980
1981         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1982         p = reserve_space(xdr, 20);
1983         /* Only whole file layouts */
1984         p = xdr_encode_hyper(p, 0); /* offset */
1985         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
1986         *p = cpu_to_be32(0); /* reclaim */
1987         encode_nfs4_stateid(xdr, &args->stateid);
1988         p = reserve_space(xdr, 20);
1989         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1990         p = xdr_encode_hyper(p, args->lastbytewritten);
1991         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1992         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1993
1994         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1995                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1996                         NFS_I(inode)->layout, xdr, args);
1997         } else {
1998                 encode_uint32(xdr, args->layoutupdate_len);
1999                 if (args->layoutupdate_pages) {
2000                         xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2001                                         args->layoutupdate_len);
2002                 }
2003         }
2004
2005         return 0;
2006 }
2007
2008 static void
2009 encode_layoutreturn(struct xdr_stream *xdr,
2010                     const struct nfs4_layoutreturn_args *args,
2011                     struct compound_hdr *hdr)
2012 {
2013         __be32 *p;
2014
2015         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2016         p = reserve_space(xdr, 16);
2017         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2018         *p++ = cpu_to_be32(args->layout_type);
2019         *p++ = cpu_to_be32(args->range.iomode);
2020         *p = cpu_to_be32(RETURN_FILE);
2021         p = reserve_space(xdr, 16);
2022         p = xdr_encode_hyper(p, args->range.offset);
2023         p = xdr_encode_hyper(p, args->range.length);
2024         spin_lock(&args->inode->i_lock);
2025         encode_nfs4_stateid(xdr, &args->stateid);
2026         spin_unlock(&args->inode->i_lock);
2027         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2028                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2029                         NFS_I(args->inode)->layout, xdr, args);
2030         } else
2031                 encode_uint32(xdr, 0);
2032 }
2033
2034 static int
2035 encode_secinfo_no_name(struct xdr_stream *xdr,
2036                        const struct nfs41_secinfo_no_name_args *args,
2037                        struct compound_hdr *hdr)
2038 {
2039         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2040         encode_uint32(xdr, args->style);
2041         return 0;
2042 }
2043
2044 static void encode_test_stateid(struct xdr_stream *xdr,
2045                                 struct nfs41_test_stateid_args *args,
2046                                 struct compound_hdr *hdr)
2047 {
2048         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2049         encode_uint32(xdr, 1);
2050         encode_nfs4_stateid(xdr, args->stateid);
2051 }
2052
2053 static void encode_free_stateid(struct xdr_stream *xdr,
2054                                 struct nfs41_free_stateid_args *args,
2055                                 struct compound_hdr *hdr)
2056 {
2057         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2058         encode_nfs4_stateid(xdr, &args->stateid);
2059 }
2060 #endif /* CONFIG_NFS_V4_1 */
2061
2062 /*
2063  * END OF "GENERIC" ENCODE ROUTINES.
2064  */
2065
2066 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2067 {
2068 #if defined(CONFIG_NFS_V4_1)
2069         struct nfs4_session *session = args->sa_slot->table->session;
2070         if (session)
2071                 return session->clp->cl_mvops->minor_version;
2072 #endif /* CONFIG_NFS_V4_1 */
2073         return 0;
2074 }
2075
2076 /*
2077  * Encode an ACCESS request
2078  */
2079 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2080                                 const struct nfs4_accessargs *args)
2081 {
2082         struct compound_hdr hdr = {
2083                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2084         };
2085
2086         encode_compound_hdr(xdr, req, &hdr);
2087         encode_sequence(xdr, &args->seq_args, &hdr);
2088         encode_putfh(xdr, args->fh, &hdr);
2089         encode_access(xdr, args->access, &hdr);
2090         encode_getfattr(xdr, args->bitmask, &hdr);
2091         encode_nops(&hdr);
2092 }
2093
2094 /*
2095  * Encode LOOKUP request
2096  */
2097 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2098                                 const struct nfs4_lookup_arg *args)
2099 {
2100         struct compound_hdr hdr = {
2101                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2102         };
2103
2104         encode_compound_hdr(xdr, req, &hdr);
2105         encode_sequence(xdr, &args->seq_args, &hdr);
2106         encode_putfh(xdr, args->dir_fh, &hdr);
2107         encode_lookup(xdr, args->name, &hdr);
2108         encode_getfh(xdr, &hdr);
2109         encode_getfattr(xdr, args->bitmask, &hdr);
2110         encode_nops(&hdr);
2111 }
2112
2113 /*
2114  * Encode LOOKUP_ROOT request
2115  */
2116 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2117                                      struct xdr_stream *xdr,
2118                                      const struct nfs4_lookup_root_arg *args)
2119 {
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         encode_compound_hdr(xdr, req, &hdr);
2125         encode_sequence(xdr, &args->seq_args, &hdr);
2126         encode_putrootfh(xdr, &hdr);
2127         encode_getfh(xdr, &hdr);
2128         encode_getfattr(xdr, args->bitmask, &hdr);
2129         encode_nops(&hdr);
2130 }
2131
2132 /*
2133  * Encode REMOVE request
2134  */
2135 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2136                                 const struct nfs_removeargs *args)
2137 {
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->fh, &hdr);
2145         encode_remove(xdr, &args->name, &hdr);
2146         encode_nops(&hdr);
2147 }
2148
2149 /*
2150  * Encode RENAME request
2151  */
2152 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2153                                 const struct nfs_renameargs *args)
2154 {
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         encode_compound_hdr(xdr, req, &hdr);
2160         encode_sequence(xdr, &args->seq_args, &hdr);
2161         encode_putfh(xdr, args->old_dir, &hdr);
2162         encode_savefh(xdr, &hdr);
2163         encode_putfh(xdr, args->new_dir, &hdr);
2164         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2165         encode_nops(&hdr);
2166 }
2167
2168 /*
2169  * Encode LINK request
2170  */
2171 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2172                              const struct nfs4_link_arg *args)
2173 {
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         encode_compound_hdr(xdr, req, &hdr);
2179         encode_sequence(xdr, &args->seq_args, &hdr);
2180         encode_putfh(xdr, args->fh, &hdr);
2181         encode_savefh(xdr, &hdr);
2182         encode_putfh(xdr, args->dir_fh, &hdr);
2183         encode_link(xdr, args->name, &hdr);
2184         encode_restorefh(xdr, &hdr);
2185         encode_getfattr(xdr, args->bitmask, &hdr);
2186         encode_nops(&hdr);
2187 }
2188
2189 /*
2190  * Encode CREATE request
2191  */
2192 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2193                                 const struct nfs4_create_arg *args)
2194 {
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         encode_compound_hdr(xdr, req, &hdr);
2200         encode_sequence(xdr, &args->seq_args, &hdr);
2201         encode_putfh(xdr, args->dir_fh, &hdr);
2202         encode_create(xdr, args, &hdr);
2203         encode_getfh(xdr, &hdr);
2204         encode_getfattr(xdr, args->bitmask, &hdr);
2205         encode_nops(&hdr);
2206 }
2207
2208 /*
2209  * Encode SYMLINK request
2210  */
2211 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2212                                  const struct nfs4_create_arg *args)
2213 {
2214         nfs4_xdr_enc_create(req, xdr, args);
2215 }
2216
2217 /*
2218  * Encode GETATTR request
2219  */
2220 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2221                                  const struct nfs4_getattr_arg *args)
2222 {
2223         struct compound_hdr hdr = {
2224                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2225         };
2226
2227         encode_compound_hdr(xdr, req, &hdr);
2228         encode_sequence(xdr, &args->seq_args, &hdr);
2229         encode_putfh(xdr, args->fh, &hdr);
2230         encode_getfattr(xdr, args->bitmask, &hdr);
2231         encode_nops(&hdr);
2232 }
2233
2234 /*
2235  * Encode a CLOSE request
2236  */
2237 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2238                                struct nfs_closeargs *args)
2239 {
2240         struct compound_hdr hdr = {
2241                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2242         };
2243
2244         encode_compound_hdr(xdr, req, &hdr);
2245         encode_sequence(xdr, &args->seq_args, &hdr);
2246         encode_putfh(xdr, args->fh, &hdr);
2247         encode_close(xdr, args, &hdr);
2248         encode_getfattr(xdr, args->bitmask, &hdr);
2249         encode_nops(&hdr);
2250 }
2251
2252 /*
2253  * Encode an OPEN request
2254  */
2255 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2256                               struct nfs_openargs *args)
2257 {
2258         struct compound_hdr hdr = {
2259                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260         };
2261
2262         encode_compound_hdr(xdr, req, &hdr);
2263         encode_sequence(xdr, &args->seq_args, &hdr);
2264         encode_putfh(xdr, args->fh, &hdr);
2265         encode_open(xdr, args, &hdr);
2266         encode_getfh(xdr, &hdr);
2267         if (args->access)
2268                 encode_access(xdr, args->access, &hdr);
2269         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2270         encode_nops(&hdr);
2271 }
2272
2273 /*
2274  * Encode an OPEN_CONFIRM request
2275  */
2276 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2277                                       struct xdr_stream *xdr,
2278                                       struct nfs_open_confirmargs *args)
2279 {
2280         struct compound_hdr hdr = {
2281                 .nops   = 0,
2282         };
2283
2284         encode_compound_hdr(xdr, req, &hdr);
2285         encode_putfh(xdr, args->fh, &hdr);
2286         encode_open_confirm(xdr, args, &hdr);
2287         encode_nops(&hdr);
2288 }
2289
2290 /*
2291  * Encode an OPEN request with no attributes.
2292  */
2293 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2294                                      struct xdr_stream *xdr,
2295                                      struct nfs_openargs *args)
2296 {
2297         struct compound_hdr hdr = {
2298                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2299         };
2300
2301         encode_compound_hdr(xdr, req, &hdr);
2302         encode_sequence(xdr, &args->seq_args, &hdr);
2303         encode_putfh(xdr, args->fh, &hdr);
2304         encode_open(xdr, args, &hdr);
2305         if (args->access)
2306                 encode_access(xdr, args->access, &hdr);
2307         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2308         encode_nops(&hdr);
2309 }
2310
2311 /*
2312  * Encode an OPEN_DOWNGRADE request
2313  */
2314 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2315                                         struct xdr_stream *xdr,
2316                                         struct nfs_closeargs *args)
2317 {
2318         struct compound_hdr hdr = {
2319                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2320         };
2321
2322         encode_compound_hdr(xdr, req, &hdr);
2323         encode_sequence(xdr, &args->seq_args, &hdr);
2324         encode_putfh(xdr, args->fh, &hdr);
2325         encode_open_downgrade(xdr, args, &hdr);
2326         encode_getfattr(xdr, args->bitmask, &hdr);
2327         encode_nops(&hdr);
2328 }
2329
2330 /*
2331  * Encode a LOCK request
2332  */
2333 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2334                               struct nfs_lock_args *args)
2335 {
2336         struct compound_hdr hdr = {
2337                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2338         };
2339
2340         encode_compound_hdr(xdr, req, &hdr);
2341         encode_sequence(xdr, &args->seq_args, &hdr);
2342         encode_putfh(xdr, args->fh, &hdr);
2343         encode_lock(xdr, args, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode a LOCKT request
2349  */
2350 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2351                                struct nfs_lockt_args *args)
2352 {
2353         struct compound_hdr hdr = {
2354                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2355         };
2356
2357         encode_compound_hdr(xdr, req, &hdr);
2358         encode_sequence(xdr, &args->seq_args, &hdr);
2359         encode_putfh(xdr, args->fh, &hdr);
2360         encode_lockt(xdr, args, &hdr);
2361         encode_nops(&hdr);
2362 }
2363
2364 /*
2365  * Encode a LOCKU request
2366  */
2367 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2368                                struct nfs_locku_args *args)
2369 {
2370         struct compound_hdr hdr = {
2371                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2372         };
2373
2374         encode_compound_hdr(xdr, req, &hdr);
2375         encode_sequence(xdr, &args->seq_args, &hdr);
2376         encode_putfh(xdr, args->fh, &hdr);
2377         encode_locku(xdr, args, &hdr);
2378         encode_nops(&hdr);
2379 }
2380
2381 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2382                                            struct xdr_stream *xdr,
2383                                         struct nfs_release_lockowner_args *args)
2384 {
2385         struct compound_hdr hdr = {
2386                 .minorversion = 0,
2387         };
2388
2389         encode_compound_hdr(xdr, req, &hdr);
2390         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2391         encode_nops(&hdr);
2392 }
2393
2394 /*
2395  * Encode a READLINK request
2396  */
2397 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2398                                   const struct nfs4_readlink *args)
2399 {
2400         struct compound_hdr hdr = {
2401                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2402         };
2403
2404         encode_compound_hdr(xdr, req, &hdr);
2405         encode_sequence(xdr, &args->seq_args, &hdr);
2406         encode_putfh(xdr, args->fh, &hdr);
2407         encode_readlink(xdr, args, req, &hdr);
2408
2409         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2410                         args->pgbase, args->pglen);
2411         encode_nops(&hdr);
2412 }
2413
2414 /*
2415  * Encode a READDIR request
2416  */
2417 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2418                                  const struct nfs4_readdir_arg *args)
2419 {
2420         struct compound_hdr hdr = {
2421                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2422         };
2423
2424         encode_compound_hdr(xdr, req, &hdr);
2425         encode_sequence(xdr, &args->seq_args, &hdr);
2426         encode_putfh(xdr, args->fh, &hdr);
2427         encode_readdir(xdr, args, req, &hdr);
2428
2429         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2430                          args->pgbase, args->count);
2431         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2432                         __func__, hdr.replen << 2, args->pages,
2433                         args->pgbase, args->count);
2434         encode_nops(&hdr);
2435 }
2436
2437 /*
2438  * Encode a READ request
2439  */
2440 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2441                               struct nfs_pgio_args *args)
2442 {
2443         struct compound_hdr hdr = {
2444                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445         };
2446
2447         encode_compound_hdr(xdr, req, &hdr);
2448         encode_sequence(xdr, &args->seq_args, &hdr);
2449         encode_putfh(xdr, args->fh, &hdr);
2450         encode_read(xdr, args, &hdr);
2451
2452         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2453                          args->pages, args->pgbase, args->count);
2454         req->rq_rcv_buf.flags |= XDRBUF_READ;
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * Encode an SETATTR request
2460  */
2461 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2462                                  struct nfs_setattrargs *args)
2463 {
2464         struct compound_hdr hdr = {
2465                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2466         };
2467
2468         encode_compound_hdr(xdr, req, &hdr);
2469         encode_sequence(xdr, &args->seq_args, &hdr);
2470         encode_putfh(xdr, args->fh, &hdr);
2471         encode_setattr(xdr, args, args->server, &hdr);
2472         encode_getfattr(xdr, args->bitmask, &hdr);
2473         encode_nops(&hdr);
2474 }
2475
2476 /*
2477  * Encode a GETACL request
2478  */
2479 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2480                                 struct nfs_getaclargs *args)
2481 {
2482         struct compound_hdr hdr = {
2483                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2484         };
2485         uint32_t replen;
2486
2487         encode_compound_hdr(xdr, req, &hdr);
2488         encode_sequence(xdr, &args->seq_args, &hdr);
2489         encode_putfh(xdr, args->fh, &hdr);
2490         replen = hdr.replen + op_decode_hdr_maxsz;
2491         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2492
2493         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2494                 args->acl_pages, 0, args->acl_len);
2495
2496         encode_nops(&hdr);
2497 }
2498
2499 /*
2500  * Encode a WRITE request
2501  */
2502 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2503                                struct nfs_pgio_args *args)
2504 {
2505         struct compound_hdr hdr = {
2506                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2507         };
2508
2509         encode_compound_hdr(xdr, req, &hdr);
2510         encode_sequence(xdr, &args->seq_args, &hdr);
2511         encode_putfh(xdr, args->fh, &hdr);
2512         encode_write(xdr, args, &hdr);
2513         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2514         if (args->bitmask)
2515                 encode_getfattr(xdr, args->bitmask, &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  *  a COMMIT request
2521  */
2522 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2523                                 struct nfs_commitargs *args)
2524 {
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2527         };
2528
2529         encode_compound_hdr(xdr, req, &hdr);
2530         encode_sequence(xdr, &args->seq_args, &hdr);
2531         encode_putfh(xdr, args->fh, &hdr);
2532         encode_commit(xdr, args, &hdr);
2533         encode_nops(&hdr);
2534 }
2535
2536 /*
2537  * FSINFO request
2538  */
2539 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                 struct nfs4_fsinfo_arg *args)
2541 {
2542         struct compound_hdr hdr = {
2543                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544         };
2545
2546         encode_compound_hdr(xdr, req, &hdr);
2547         encode_sequence(xdr, &args->seq_args, &hdr);
2548         encode_putfh(xdr, args->fh, &hdr);
2549         encode_fsinfo(xdr, args->bitmask, &hdr);
2550         encode_nops(&hdr);
2551 }
2552
2553 /*
2554  * a PATHCONF request
2555  */
2556 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2557                                   const struct nfs4_pathconf_arg *args)
2558 {
2559         struct compound_hdr hdr = {
2560                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561         };
2562
2563         encode_compound_hdr(xdr, req, &hdr);
2564         encode_sequence(xdr, &args->seq_args, &hdr);
2565         encode_putfh(xdr, args->fh, &hdr);
2566         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2567                            &hdr);
2568         encode_nops(&hdr);
2569 }
2570
2571 /*
2572  * a STATFS request
2573  */
2574 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2575                                 const struct nfs4_statfs_arg *args)
2576 {
2577         struct compound_hdr hdr = {
2578                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2579         };
2580
2581         encode_compound_hdr(xdr, req, &hdr);
2582         encode_sequence(xdr, &args->seq_args, &hdr);
2583         encode_putfh(xdr, args->fh, &hdr);
2584         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2585                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2586         encode_nops(&hdr);
2587 }
2588
2589 /*
2590  * GETATTR_BITMAP request
2591  */
2592 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2593                                      struct xdr_stream *xdr,
2594                                      struct nfs4_server_caps_arg *args)
2595 {
2596         const u32 *bitmask = args->bitmask;
2597         struct compound_hdr hdr = {
2598                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2599         };
2600
2601         encode_compound_hdr(xdr, req, &hdr);
2602         encode_sequence(xdr, &args->seq_args, &hdr);
2603         encode_putfh(xdr, args->fhandle, &hdr);
2604         encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2605         encode_nops(&hdr);
2606 }
2607
2608 /*
2609  * a RENEW request
2610  */
2611 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2612                                struct nfs_client *clp)
2613 {
2614         struct compound_hdr hdr = {
2615                 .nops   = 0,
2616         };
2617
2618         encode_compound_hdr(xdr, req, &hdr);
2619         encode_renew(xdr, clp->cl_clientid, &hdr);
2620         encode_nops(&hdr);
2621 }
2622
2623 /*
2624  * a SETCLIENTID request
2625  */
2626 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2627                                      struct xdr_stream *xdr,
2628                                      struct nfs4_setclientid *sc)
2629 {
2630         struct compound_hdr hdr = {
2631                 .nops   = 0,
2632         };
2633
2634         encode_compound_hdr(xdr, req, &hdr);
2635         encode_setclientid(xdr, sc, &hdr);
2636         encode_nops(&hdr);
2637 }
2638
2639 /*
2640  * a SETCLIENTID_CONFIRM request
2641  */
2642 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2643                                              struct xdr_stream *xdr,
2644                                              struct nfs4_setclientid_res *arg)
2645 {
2646         struct compound_hdr hdr = {
2647                 .nops   = 0,
2648         };
2649
2650         encode_compound_hdr(xdr, req, &hdr);
2651         encode_setclientid_confirm(xdr, arg, &hdr);
2652         encode_nops(&hdr);
2653 }
2654
2655 /*
2656  * DELEGRETURN request
2657  */
2658 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2659                                      struct xdr_stream *xdr,
2660                                      const struct nfs4_delegreturnargs *args)
2661 {
2662         struct compound_hdr hdr = {
2663                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664         };
2665
2666         encode_compound_hdr(xdr, req, &hdr);
2667         encode_sequence(xdr, &args->seq_args, &hdr);
2668         encode_putfh(xdr, args->fhandle, &hdr);
2669         encode_getfattr(xdr, args->bitmask, &hdr);
2670         encode_delegreturn(xdr, args->stateid, &hdr);
2671         encode_nops(&hdr);
2672 }
2673
2674 /*
2675  * Encode FS_LOCATIONS request
2676  */
2677 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2678                                       struct xdr_stream *xdr,
2679                                       struct nfs4_fs_locations_arg *args)
2680 {
2681         struct compound_hdr hdr = {
2682                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683         };
2684         uint32_t replen;
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_sequence(xdr, &args->seq_args, &hdr);
2688         if (args->migration) {
2689                 encode_putfh(xdr, args->fh, &hdr);
2690                 replen = hdr.replen;
2691                 encode_fs_locations(xdr, args->bitmask, &hdr);
2692                 if (args->renew)
2693                         encode_renew(xdr, args->clientid, &hdr);
2694         } else {
2695                 encode_putfh(xdr, args->dir_fh, &hdr);
2696                 encode_lookup(xdr, args->name, &hdr);
2697                 replen = hdr.replen;
2698                 encode_fs_locations(xdr, args->bitmask, &hdr);
2699         }
2700
2701         /* Set up reply kvec to capture returned fs_locations array. */
2702         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2703                         0, PAGE_SIZE);
2704         encode_nops(&hdr);
2705 }
2706
2707 /*
2708  * Encode SECINFO request
2709  */
2710 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2711                                 struct xdr_stream *xdr,
2712                                 struct nfs4_secinfo_arg *args)
2713 {
2714         struct compound_hdr hdr = {
2715                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716         };
2717
2718         encode_compound_hdr(xdr, req, &hdr);
2719         encode_sequence(xdr, &args->seq_args, &hdr);
2720         encode_putfh(xdr, args->dir_fh, &hdr);
2721         encode_secinfo(xdr, args->name, &hdr);
2722         encode_nops(&hdr);
2723 }
2724
2725 /*
2726  * Encode FSID_PRESENT request
2727  */
2728 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2729                                       struct xdr_stream *xdr,
2730                                       struct nfs4_fsid_present_arg *args)
2731 {
2732         struct compound_hdr hdr = {
2733                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2734         };
2735
2736         encode_compound_hdr(xdr, req, &hdr);
2737         encode_sequence(xdr, &args->seq_args, &hdr);
2738         encode_putfh(xdr, args->fh, &hdr);
2739         encode_getfh(xdr, &hdr);
2740         if (args->renew)
2741                 encode_renew(xdr, args->clientid, &hdr);
2742         encode_nops(&hdr);
2743 }
2744
2745 #if defined(CONFIG_NFS_V4_1)
2746 /*
2747  * BIND_CONN_TO_SESSION request
2748  */
2749 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2750                                 struct xdr_stream *xdr,
2751                                 struct nfs41_bind_conn_to_session_args *args)
2752 {
2753         struct compound_hdr hdr = {
2754                 .minorversion = args->client->cl_mvops->minor_version,
2755         };
2756
2757         encode_compound_hdr(xdr, req, &hdr);
2758         encode_bind_conn_to_session(xdr, args, &hdr);
2759         encode_nops(&hdr);
2760 }
2761
2762 /*
2763  * EXCHANGE_ID request
2764  */
2765 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2766                                      struct xdr_stream *xdr,
2767                                      struct nfs41_exchange_id_args *args)
2768 {
2769         struct compound_hdr hdr = {
2770                 .minorversion = args->client->cl_mvops->minor_version,
2771         };
2772
2773         encode_compound_hdr(xdr, req, &hdr);
2774         encode_exchange_id(xdr, args, &hdr);
2775         encode_nops(&hdr);
2776 }
2777
2778 /*
2779  * a CREATE_SESSION request
2780  */
2781 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2782                                         struct xdr_stream *xdr,
2783                                         struct nfs41_create_session_args *args)
2784 {
2785         struct compound_hdr hdr = {
2786                 .minorversion = args->client->cl_mvops->minor_version,
2787         };
2788
2789         encode_compound_hdr(xdr, req, &hdr);
2790         encode_create_session(xdr, args, &hdr);
2791         encode_nops(&hdr);
2792 }
2793
2794 /*
2795  * a DESTROY_SESSION request
2796  */
2797 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2798                                          struct xdr_stream *xdr,
2799                                          struct nfs4_session *session)
2800 {
2801         struct compound_hdr hdr = {
2802                 .minorversion = session->clp->cl_mvops->minor_version,
2803         };
2804
2805         encode_compound_hdr(xdr, req, &hdr);
2806         encode_destroy_session(xdr, session, &hdr);
2807         encode_nops(&hdr);
2808 }
2809
2810 /*
2811  * a DESTROY_CLIENTID request
2812  */
2813 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2814                                          struct xdr_stream *xdr,
2815                                          struct nfs_client *clp)
2816 {
2817         struct compound_hdr hdr = {
2818                 .minorversion = clp->cl_mvops->minor_version,
2819         };
2820
2821         encode_compound_hdr(xdr, req, &hdr);
2822         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2823         encode_nops(&hdr);
2824 }
2825
2826 /*
2827  * a SEQUENCE request
2828  */
2829 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2830                                   struct nfs4_sequence_args *args)
2831 {
2832         struct compound_hdr hdr = {
2833                 .minorversion = nfs4_xdr_minorversion(args),
2834         };
2835
2836         encode_compound_hdr(xdr, req, &hdr);
2837         encode_sequence(xdr, args, &hdr);
2838         encode_nops(&hdr);
2839 }
2840
2841 /*
2842  * a GET_LEASE_TIME request
2843  */
2844 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2845                                         struct xdr_stream *xdr,
2846                                         struct nfs4_get_lease_time_args *args)
2847 {
2848         struct compound_hdr hdr = {
2849                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2850         };
2851         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2852
2853         encode_compound_hdr(xdr, req, &hdr);
2854         encode_sequence(xdr, &args->la_seq_args, &hdr);
2855         encode_putrootfh(xdr, &hdr);
2856         encode_fsinfo(xdr, lease_bitmap, &hdr);
2857         encode_nops(&hdr);
2858 }
2859
2860 /*
2861  * a RECLAIM_COMPLETE request
2862  */
2863 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2864                                           struct xdr_stream *xdr,
2865                                 struct nfs41_reclaim_complete_args *args)
2866 {
2867         struct compound_hdr hdr = {
2868                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2869         };
2870
2871         encode_compound_hdr(xdr, req, &hdr);
2872         encode_sequence(xdr, &args->seq_args, &hdr);
2873         encode_reclaim_complete(xdr, args, &hdr);
2874         encode_nops(&hdr);
2875 }
2876
2877 /*
2878  * Encode GETDEVICEINFO request
2879  */
2880 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2881                                        struct xdr_stream *xdr,
2882                                        struct nfs4_getdeviceinfo_args *args)
2883 {
2884         struct compound_hdr hdr = {
2885                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2886         };
2887
2888         encode_compound_hdr(xdr, req, &hdr);
2889         encode_sequence(xdr, &args->seq_args, &hdr);
2890         encode_getdeviceinfo(xdr, args, &hdr);
2891
2892         /* set up reply kvec. Subtract notification bitmap max size (2)
2893          * so that notification bitmap is put in xdr_buf tail */
2894         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2895                          args->pdev->pages, args->pdev->pgbase,
2896                          args->pdev->pglen);
2897
2898         encode_nops(&hdr);
2899 }
2900
2901 /*
2902  *  Encode LAYOUTGET request
2903  */
2904 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2905                                    struct xdr_stream *xdr,
2906                                    struct nfs4_layoutget_args *args)
2907 {
2908         struct compound_hdr hdr = {
2909                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2910         };
2911
2912         encode_compound_hdr(xdr, req, &hdr);
2913         encode_sequence(xdr, &args->seq_args, &hdr);
2914         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2915         encode_layoutget(xdr, args, &hdr);
2916
2917         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2918             args->layout.pages, 0, args->layout.pglen);
2919
2920         encode_nops(&hdr);
2921 }
2922
2923 /*
2924  *  Encode LAYOUTCOMMIT request
2925  */
2926 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2927                                       struct xdr_stream *xdr,
2928                                       struct nfs4_layoutcommit_args *args)
2929 {
2930         struct nfs4_layoutcommit_data *data =
2931                 container_of(args, struct nfs4_layoutcommit_data, args);
2932         struct compound_hdr hdr = {
2933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2934         };
2935
2936         encode_compound_hdr(xdr, req, &hdr);
2937         encode_sequence(xdr, &args->seq_args, &hdr);
2938         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2939         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2940         encode_getfattr(xdr, args->bitmask, &hdr);
2941         encode_nops(&hdr);
2942 }
2943
2944 /*
2945  * Encode LAYOUTRETURN request
2946  */
2947 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2948                                       struct xdr_stream *xdr,
2949                                       struct nfs4_layoutreturn_args *args)
2950 {
2951         struct compound_hdr hdr = {
2952                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2953         };
2954
2955         encode_compound_hdr(xdr, req, &hdr);
2956         encode_sequence(xdr, &args->seq_args, &hdr);
2957         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2958         encode_layoutreturn(xdr, args, &hdr);
2959         encode_nops(&hdr);
2960 }
2961
2962 /*
2963  * Encode SECINFO_NO_NAME request
2964  */
2965 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2966                                         struct xdr_stream *xdr,
2967                                         struct nfs41_secinfo_no_name_args *args)
2968 {
2969         struct compound_hdr hdr = {
2970                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2971         };
2972
2973         encode_compound_hdr(xdr, req, &hdr);
2974         encode_sequence(xdr, &args->seq_args, &hdr);
2975         encode_putrootfh(xdr, &hdr);
2976         encode_secinfo_no_name(xdr, args, &hdr);
2977         encode_nops(&hdr);
2978         return 0;
2979 }
2980
2981 /*
2982  *  Encode TEST_STATEID request
2983  */
2984 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2985                                       struct xdr_stream *xdr,
2986                                       struct nfs41_test_stateid_args *args)
2987 {
2988         struct compound_hdr hdr = {
2989                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2990         };
2991
2992         encode_compound_hdr(xdr, req, &hdr);
2993         encode_sequence(xdr, &args->seq_args, &hdr);
2994         encode_test_stateid(xdr, args, &hdr);
2995         encode_nops(&hdr);
2996 }
2997
2998 /*
2999  *  Encode FREE_STATEID request
3000  */
3001 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3002                                      struct xdr_stream *xdr,
3003                                      struct nfs41_free_stateid_args *args)
3004 {
3005         struct compound_hdr hdr = {
3006                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3007         };
3008
3009         encode_compound_hdr(xdr, req, &hdr);
3010         encode_sequence(xdr, &args->seq_args, &hdr);
3011         encode_free_stateid(xdr, args, &hdr);
3012         encode_nops(&hdr);
3013 }
3014 #endif /* CONFIG_NFS_V4_1 */
3015
3016 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3017 {
3018         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3019                 "Remaining buffer length is %tu words.\n",
3020                 func, xdr->end - xdr->p);
3021 }
3022
3023 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3024 {
3025         __be32 *p;
3026
3027         p = xdr_inline_decode(xdr, 4);
3028         if (unlikely(!p))
3029                 goto out_overflow;
3030         *len = be32_to_cpup(p);
3031         p = xdr_inline_decode(xdr, *len);
3032         if (unlikely(!p))
3033                 goto out_overflow;
3034         *string = (char *)p;
3035         return 0;
3036 out_overflow:
3037         print_overflow_msg(__func__, xdr);
3038         return -EIO;
3039 }
3040
3041 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3042 {
3043         __be32 *p;
3044
3045         p = xdr_inline_decode(xdr, 8);
3046         if (unlikely(!p))
3047                 goto out_overflow;
3048         hdr->status = be32_to_cpup(p++);
3049         hdr->taglen = be32_to_cpup(p);
3050
3051         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3052         if (unlikely(!p))
3053                 goto out_overflow;
3054         hdr->tag = (char *)p;
3055         p += XDR_QUADLEN(hdr->taglen);
3056         hdr->nops = be32_to_cpup(p);
3057         if (unlikely(hdr->nops < 1))
3058                 return nfs4_stat_to_errno(hdr->status);
3059         return 0;
3060 out_overflow:
3061         print_overflow_msg(__func__, xdr);
3062         return -EIO;
3063 }
3064
3065 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3066                 int *nfs_retval)
3067 {
3068         __be32 *p;
3069         uint32_t opnum;
3070         int32_t nfserr;
3071
3072         p = xdr_inline_decode(xdr, 8);
3073         if (unlikely(!p))
3074                 goto out_overflow;
3075         opnum = be32_to_cpup(p++);
3076         if (unlikely(opnum != expected))
3077                 goto out_bad_operation;
3078         nfserr = be32_to_cpup(p);
3079         if (nfserr == NFS_OK)
3080                 *nfs_retval = 0;
3081         else
3082                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3083         return true;
3084 out_bad_operation:
3085         dprintk("nfs: Server returned operation"
3086                 " %d but we issued a request for %d\n",
3087                         opnum, expected);
3088         *nfs_retval = -EREMOTEIO;
3089         return false;
3090 out_overflow:
3091         print_overflow_msg(__func__, xdr);
3092         *nfs_retval = -EIO;
3093         return false;
3094 }
3095
3096 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3097 {
3098         int retval;
3099
3100         __decode_op_hdr(xdr, expected, &retval);
3101         return retval;
3102 }
3103
3104 /* Dummy routine */
3105 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3106 {
3107         __be32 *p;
3108         unsigned int strlen;
3109         char *str;
3110
3111         p = xdr_inline_decode(xdr, 12);
3112         if (likely(p))
3113                 return decode_opaque_inline(xdr, &strlen, &str);
3114         print_overflow_msg(__func__, xdr);
3115         return -EIO;
3116 }
3117
3118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3119 {
3120         uint32_t bmlen;
3121         __be32 *p;
3122
3123         p = xdr_inline_decode(xdr, 4);
3124         if (unlikely(!p))
3125                 goto out_overflow;
3126         bmlen = be32_to_cpup(p);
3127
3128         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3129         p = xdr_inline_decode(xdr, (bmlen << 2));
3130         if (unlikely(!p))
3131                 goto out_overflow;
3132         if (bmlen > 0) {
3133                 bitmap[0] = be32_to_cpup(p++);
3134                 if (bmlen > 1) {
3135                         bitmap[1] = be32_to_cpup(p++);
3136                         if (bmlen > 2)
3137                                 bitmap[2] = be32_to_cpup(p);
3138                 }
3139         }
3140         return 0;
3141 out_overflow:
3142         print_overflow_msg(__func__, xdr);
3143         return -EIO;
3144 }
3145
3146 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3147 {
3148         __be32 *p;
3149
3150         p = xdr_inline_decode(xdr, 4);
3151         if (unlikely(!p))
3152                 goto out_overflow;
3153         *attrlen = be32_to_cpup(p);
3154         *savep = xdr_stream_pos(xdr);
3155         return 0;
3156 out_overflow:
3157         print_overflow_msg(__func__, xdr);
3158         return -EIO;
3159 }
3160
3161 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3162 {
3163         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3164                 int ret;
3165                 ret = decode_attr_bitmap(xdr, bitmask);
3166                 if (unlikely(ret < 0))
3167                         return ret;
3168                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3169         } else
3170                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3171         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3172                 bitmask[0], bitmask[1], bitmask[2]);
3173         return 0;
3174 }
3175
3176 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3177 {
3178         __be32 *p;
3179         int ret = 0;
3180
3181         *type = 0;
3182         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3183                 return -EIO;
3184         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3185                 p = xdr_inline_decode(xdr, 4);
3186                 if (unlikely(!p))
3187                         goto out_overflow;
3188                 *type = be32_to_cpup(p);
3189                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3190                         dprintk("%s: bad type %d\n", __func__, *type);
3191                         return -EIO;
3192                 }
3193                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3194                 ret = NFS_ATTR_FATTR_TYPE;
3195         }
3196         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3197         return ret;
3198 out_overflow:
3199         print_overflow_msg(__func__, xdr);
3200         return -EIO;
3201 }
3202
3203 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3204                                       uint32_t *bitmap, uint32_t *type)
3205 {
3206         __be32 *p;
3207
3208         *type = 0;
3209         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3210                 return -EIO;
3211         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3212                 p = xdr_inline_decode(xdr, 4);
3213                 if (unlikely(!p))
3214                         goto out_overflow;
3215                 *type = be32_to_cpup(p);
3216                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3217         }
3218         dprintk("%s: expire type=0x%x\n", __func__, *type);
3219         return 0;
3220 out_overflow:
3221         print_overflow_msg(__func__, xdr);
3222         return -EIO;
3223 }
3224
3225 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3226 {
3227         __be32 *p;
3228         int ret = 0;
3229
3230         *change = 0;
3231         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3232                 return -EIO;
3233         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3234                 p = xdr_inline_decode(xdr, 8);
3235                 if (unlikely(!p))
3236                         goto out_overflow;
3237                 xdr_decode_hyper(p, change);
3238                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3239                 ret = NFS_ATTR_FATTR_CHANGE;
3240         }
3241         dprintk("%s: change attribute=%Lu\n", __func__,
3242                         (unsigned long long)*change);
3243         return ret;
3244 out_overflow:
3245         print_overflow_msg(__func__, xdr);
3246         return -EIO;
3247 }
3248
3249 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3250 {
3251         __be32 *p;
3252         int ret = 0;
3253
3254         *size = 0;
3255         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3256                 return -EIO;
3257         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3258                 p = xdr_inline_decode(xdr, 8);
3259                 if (unlikely(!p))
3260                         goto out_overflow;
3261                 xdr_decode_hyper(p, size);
3262                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3263                 ret = NFS_ATTR_FATTR_SIZE;
3264         }
3265         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3266         return ret;
3267 out_overflow:
3268         print_overflow_msg(__func__, xdr);
3269         return -EIO;
3270 }
3271
3272 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3273 {
3274         __be32 *p;
3275
3276         *res = 0;
3277         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3278                 return -EIO;
3279         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3280                 p = xdr_inline_decode(xdr, 4);
3281                 if (unlikely(!p))
3282                         goto out_overflow;
3283                 *res = be32_to_cpup(p);
3284                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3285         }
3286         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3287         return 0;
3288 out_overflow:
3289         print_overflow_msg(__func__, xdr);
3290         return -EIO;
3291 }
3292
3293 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3294 {
3295         __be32 *p;
3296
3297         *res = 0;
3298         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3299                 return -EIO;
3300         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3301                 p = xdr_inline_decode(xdr, 4);
3302                 if (unlikely(!p))
3303                         goto out_overflow;
3304                 *res = be32_to_cpup(p);
3305                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3306         }
3307         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3308         return 0;
3309 out_overflow:
3310         print_overflow_msg(__func__, xdr);
3311         return -EIO;
3312 }
3313
3314 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3315 {
3316         __be32 *p;
3317         int ret = 0;
3318
3319         fsid->major = 0;
3320         fsid->minor = 0;
3321         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3322                 return -EIO;
3323         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3324                 p = xdr_inline_decode(xdr, 16);
3325                 if (unlikely(!p))
3326                         goto out_overflow;
3327                 p = xdr_decode_hyper(p, &fsid->major);
3328                 xdr_decode_hyper(p, &fsid->minor);
3329                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3330                 ret = NFS_ATTR_FATTR_FSID;
3331         }
3332         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3333                         (unsigned long long)fsid->major,
3334                         (unsigned long long)fsid->minor);
3335         return ret;
3336 out_overflow:
3337         print_overflow_msg(__func__, xdr);
3338         return -EIO;
3339 }
3340
3341 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3342 {
3343         __be32 *p;
3344
3345         *res = 60;
3346         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3347                 return -EIO;
3348         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3349                 p = xdr_inline_decode(xdr, 4);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 *res = be32_to_cpup(p);
3353                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3354         }
3355         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3356         return 0;
3357 out_overflow:
3358         print_overflow_msg(__func__, xdr);
3359         return -EIO;
3360 }
3361
3362 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3363 {
3364         __be32 *p;
3365
3366         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3367                 return -EIO;
3368         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3369                 p = xdr_inline_decode(xdr, 4);
3370                 if (unlikely(!p))
3371                         goto out_overflow;
3372                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3373                 *res = -be32_to_cpup(p);
3374         }
3375         return 0;
3376 out_overflow:
3377         print_overflow_msg(__func__, xdr);
3378         return -EIO;
3379 }
3380
3381 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3382                                  uint32_t *bitmap, uint32_t *bitmask)
3383 {
3384         if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3385                 int ret;
3386                 ret = decode_attr_bitmap(xdr, bitmask);
3387                 if (unlikely(ret < 0))
3388                         return ret;
3389                 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3390         } else
3391                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3392         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3393                 bitmask[0], bitmask[1], bitmask[2]);
3394         return 0;
3395 }
3396
3397 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3398 {
3399         __be32 *p;
3400         int len;
3401
3402         if (fh != NULL)
3403                 memset(fh, 0, sizeof(*fh));
3404
3405         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3406                 return -EIO;
3407         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3408                 p = xdr_inline_decode(xdr, 4);
3409                 if (unlikely(!p))
3410                         goto out_overflow;
3411                 len = be32_to_cpup(p);
3412                 if (len > NFS4_FHSIZE)
3413                         return -EIO;
3414                 p = xdr_inline_decode(xdr, len);
3415                 if (unlikely(!p))
3416                         goto out_overflow;
3417                 if (fh != NULL) {
3418                         memcpy(fh->data, p, len);
3419                         fh->size = len;
3420                 }
3421                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3422         }
3423         return 0;
3424 out_overflow:
3425         print_overflow_msg(__func__, xdr);
3426         return -EIO;
3427 }
3428
3429 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3430 {
3431         __be32 *p;
3432
3433         *res = 0;
3434         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3435                 return -EIO;
3436         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3437                 p = xdr_inline_decode(xdr, 4);
3438                 if (unlikely(!p))
3439                         goto out_overflow;
3440                 *res = be32_to_cpup(p);
3441                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3442         }
3443         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3444         return 0;
3445 out_overflow:
3446         print_overflow_msg(__func__, xdr);
3447         return -EIO;
3448 }
3449
3450 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3451 {
3452         __be32 *p;
3453         int ret = 0;
3454
3455         *fileid = 0;
3456         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3457                 return -EIO;
3458         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3459                 p = xdr_inline_decode(xdr, 8);
3460                 if (unlikely(!p))
3461                         goto out_overflow;
3462                 xdr_decode_hyper(p, fileid);
3463                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3464                 ret = NFS_ATTR_FATTR_FILEID;
3465         }
3466         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3467         return ret;
3468 out_overflow:
3469         print_overflow_msg(__func__, xdr);
3470         return -EIO;
3471 }
3472
3473 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3474 {
3475         __be32 *p;
3476         int ret = 0;
3477
3478         *fileid = 0;
3479         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3480                 return -EIO;
3481         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3482                 p = xdr_inline_decode(xdr, 8);
3483                 if (unlikely(!p))
3484                         goto out_overflow;
3485                 xdr_decode_hyper(p, fileid);
3486                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3487                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3488         }
3489         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3490         return ret;
3491 out_overflow:
3492         print_overflow_msg(__func__, xdr);
3493         return -EIO;
3494 }
3495
3496 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3497 {
3498         __be32 *p;
3499         int status = 0;
3500
3501         *res = 0;
3502         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3503                 return -EIO;
3504         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3505                 p = xdr_inline_decode(xdr, 8);
3506                 if (unlikely(!p))
3507                         goto out_overflow;
3508                 xdr_decode_hyper(p, res);
3509                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3510         }
3511         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3512         return status;
3513 out_overflow:
3514         print_overflow_msg(__func__, xdr);
3515         return -EIO;
3516 }
3517
3518 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3519 {
3520         __be32 *p;
3521         int status = 0;
3522
3523         *res = 0;
3524         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3525                 return -EIO;
3526         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3527                 p = xdr_inline_decode(xdr, 8);
3528                 if (unlikely(!p))
3529                         goto out_overflow;
3530                 xdr_decode_hyper(p, res);
3531                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3532         }
3533         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3534         return status;
3535 out_overflow:
3536         print_overflow_msg(__func__, xdr);
3537         return -EIO;
3538 }
3539
3540 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3541 {
3542         __be32 *p;
3543         int status = 0;
3544
3545         *res = 0;
3546         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3547                 return -EIO;
3548         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3549                 p = xdr_inline_decode(xdr, 8);
3550                 if (unlikely(!p))
3551                         goto out_overflow;
3552                 xdr_decode_hyper(p, res);
3553                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3554         }
3555         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3556         return status;
3557 out_overflow:
3558         print_overflow_msg(__func__, xdr);
3559         return -EIO;
3560 }
3561
3562 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3563 {
3564         u32 n;
3565         __be32 *p;
3566         int status = 0;
3567
3568         p = xdr_inline_decode(xdr, 4);
3569         if (unlikely(!p))
3570                 goto out_overflow;
3571         n = be32_to_cpup(p);
3572         if (n == 0)
3573                 goto root_path;
3574         dprintk("pathname4: ");
3575         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3576                 dprintk("cannot parse %d components in path\n", n);
3577                 goto out_eio;
3578         }
3579         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3580                 struct nfs4_string *component = &path->components[path->ncomponents];
3581                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3582                 if (unlikely(status != 0))
3583                         goto out_eio;
3584                 ifdebug (XDR)
3585                         pr_cont("%s%.*s ",
3586                                 (path->ncomponents != n ? "/ " : ""),
3587                                 component->len, component->data);
3588         }
3589 out:
3590         return status;
3591 root_path:
3592 /* a root pathname is sent as a zero component4 */
3593         path->ncomponents = 1;
3594         path->components[0].len=0;
3595         path->components[0].data=NULL;
3596         dprintk("pathname4: /\n");
3597         goto out;
3598 out_eio:
3599         dprintk(" status %d", status);
3600         status = -EIO;
3601         goto out;
3602 out_overflow:
3603         print_overflow_msg(__func__, xdr);
3604         return -EIO;
3605 }
3606
3607 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3608 {
3609         int n;
3610         __be32 *p;
3611         int status = -EIO;
3612
3613         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3614                 goto out;
3615         status = 0;
3616         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3617                 goto out;
3618         bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3619         status = -EIO;
3620         /* Ignore borken servers that return unrequested attrs */
3621         if (unlikely(res == NULL))
3622                 goto out;
3623         dprintk("%s: fsroot:\n", __func__);
3624         status = decode_pathname(xdr, &res->fs_path);
3625         if (unlikely(status != 0))
3626                 goto out;
3627         p = xdr_inline_decode(xdr, 4);
3628         if (unlikely(!p))
3629                 goto out_overflow;
3630         n = be32_to_cpup(p);
3631         if (n <= 0)
3632                 goto out_eio;
3633         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3634                 u32 m;
3635                 struct nfs4_fs_location *loc;
3636
3637                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3638                         break;
3639                 loc = &res->locations[res->nlocations];
3640                 p = xdr_inline_decode(xdr, 4);
3641                 if (unlikely(!p))
3642                         goto out_overflow;
3643                 m = be32_to_cpup(p);
3644
3645                 dprintk("%s: servers:\n", __func__);
3646                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3647                         struct nfs4_string *server;
3648
3649                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3650                                 unsigned int i;
3651                                 dprintk("%s: using first %u of %u servers "
3652                                         "returned for location %u\n",
3653                                                 __func__,
3654                                                 NFS4_FS_LOCATION_MAXSERVERS,
3655                                                 m, res->nlocations);
3656                                 for (i = loc->nservers; i < m; i++) {
3657                                         unsigned int len;
3658                                         char *data;
3659                                         status = decode_opaque_inline(xdr, &len, &data);
3660                                         if (unlikely(status != 0))
3661                                                 goto out_eio;
3662                                 }
3663                                 break;
3664                         }
3665                         server = &loc->servers[loc->nservers];
3666                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3667                         if (unlikely(status != 0))
3668                                 goto out_eio;
3669                         dprintk("%s ", server->data);
3670                 }
3671                 status = decode_pathname(xdr, &loc->rootpath);
3672                 if (unlikely(status != 0))
3673                         goto out_eio;
3674         }
3675         if (res->nlocations != 0)
3676                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3677 out:
3678         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3679         return status;
3680 out_overflow:
3681         print_overflow_msg(__func__, xdr);
3682 out_eio:
3683         status = -EIO;
3684         goto out;
3685 }
3686
3687 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3688 {
3689         __be32 *p;
3690         int status = 0;
3691
3692         *res = 0;
3693         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3694                 return -EIO;
3695         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3696                 p = xdr_inline_decode(xdr, 8);
3697                 if (unlikely(!p))
3698                         goto out_overflow;
3699                 xdr_decode_hyper(p, res);
3700                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3701         }
3702         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3703         return status;
3704 out_overflow:
3705         print_overflow_msg(__func__, xdr);
3706         return -EIO;
3707 }
3708
3709 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3710 {
3711         __be32 *p;
3712         int status = 0;
3713
3714         *maxlink = 1;
3715         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3716                 return -EIO;
3717         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3718                 p = xdr_inline_decode(xdr, 4);
3719                 if (unlikely(!p))
3720                         goto out_overflow;
3721                 *maxlink = be32_to_cpup(p);
3722                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3723         }
3724         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3725         return status;
3726 out_overflow:
3727         print_overflow_msg(__func__, xdr);
3728         return -EIO;
3729 }
3730
3731 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3732 {
3733         __be32 *p;
3734         int status = 0;
3735
3736         *maxname = 1024;
3737         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3738                 return -EIO;
3739         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3740                 p = xdr_inline_decode(xdr, 4);
3741                 if (unlikely(!p))
3742                         goto out_overflow;
3743                 *maxname = be32_to_cpup(p);
3744                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3745         }
3746         dprintk("%s: maxname=%u\n", __func__, *maxname);
3747         return status;
3748 out_overflow:
3749         print_overflow_msg(__func__, xdr);
3750         return -EIO;
3751 }
3752
3753 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3754 {
3755         __be32 *p;
3756         int status = 0;
3757
3758         *res = 1024;
3759         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3762                 uint64_t maxread;
3763                 p = xdr_inline_decode(xdr, 8);
3764                 if (unlikely(!p))
3765                         goto out_overflow;
3766                 xdr_decode_hyper(p, &maxread);
3767                 if (maxread > 0x7FFFFFFF)
3768                         maxread = 0x7FFFFFFF;
3769                 *res = (uint32_t)maxread;
3770                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3771         }
3772         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3773         return status;
3774 out_overflow:
3775         print_overflow_msg(__func__, xdr);
3776         return -EIO;
3777 }
3778
3779 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3780 {
3781         __be32 *p;
3782         int status = 0;
3783
3784         *res = 1024;
3785         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3786                 return -EIO;
3787         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3788                 uint64_t maxwrite;
3789                 p = xdr_inline_decode(xdr, 8);
3790                 if (unlikely(!p))
3791                         goto out_overflow;
3792                 xdr_decode_hyper(p, &maxwrite);
3793                 if (maxwrite > 0x7FFFFFFF)
3794                         maxwrite = 0x7FFFFFFF;
3795                 *res = (uint32_t)maxwrite;
3796                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3797         }
3798         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3799         return status;
3800 out_overflow:
3801         print_overflow_msg(__func__, xdr);
3802         return -EIO;
3803 }
3804
3805 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3806 {
3807         uint32_t tmp;
3808         __be32 *p;
3809         int ret = 0;
3810
3811         *mode = 0;
3812         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3813                 return -EIO;
3814         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3815                 p = xdr_inline_decode(xdr, 4);
3816                 if (unlikely(!p))
3817                         goto out_overflow;
3818                 tmp = be32_to_cpup(p);
3819                 *mode = tmp & ~S_IFMT;
3820                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3821                 ret = NFS_ATTR_FATTR_MODE;
3822         }
3823         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3824         return ret;
3825 out_overflow:
3826         print_overflow_msg(__func__, xdr);
3827         return -EIO;
3828 }
3829
3830 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3831 {
3832         __be32 *p;
3833         int ret = 0;
3834
3835         *nlink = 1;
3836         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3837                 return -EIO;
3838         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3839                 p = xdr_inline_decode(xdr, 4);
3840                 if (unlikely(!p))
3841                         goto out_overflow;
3842                 *nlink = be32_to_cpup(p);
3843                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3844                 ret = NFS_ATTR_FATTR_NLINK;
3845         }
3846         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3847         return ret;
3848 out_overflow:
3849         print_overflow_msg(__func__, xdr);
3850         return -EIO;
3851 }
3852
3853 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3854                 const struct nfs_server *server, kuid_t *uid,
3855                 struct nfs4_string *owner_name)
3856 {
3857         uint32_t len;
3858         __be32 *p;
3859         int ret = 0;
3860
3861         *uid = make_kuid(&init_user_ns, -2);
3862         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3863                 return -EIO;
3864         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3865                 p = xdr_inline_decode(xdr, 4);
3866                 if (unlikely(!p))
3867                         goto out_overflow;
3868                 len = be32_to_cpup(p);
3869                 p = xdr_inline_decode(xdr, len);
3870                 if (unlikely(!p))
3871                         goto out_overflow;
3872                 if (owner_name != NULL) {
3873                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3874                         if (owner_name->data != NULL) {
3875                                 owner_name->len = len;
3876                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3877                         }
3878                 } else if (len < XDR_MAX_NETOBJ) {
3879                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3880                                 ret = NFS_ATTR_FATTR_OWNER;
3881                         else
3882                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3883                                                 __func__);
3884                 } else
3885                         dprintk("%s: name too long (%u)!\n",
3886                                         __func__, len);
3887                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3888         }
3889         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3890         return ret;
3891 out_overflow:
3892         print_overflow_msg(__func__, xdr);
3893         return -EIO;
3894 }
3895
3896 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3897                 const struct nfs_server *server, kgid_t *gid,
3898                 struct nfs4_string *group_name)
3899 {
3900         uint32_t len;
3901         __be32 *p;
3902         int ret = 0;
3903
3904         *gid = make_kgid(&init_user_ns, -2);
3905         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3906                 return -EIO;
3907         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3908                 p = xdr_inline_decode(xdr, 4);
3909                 if (unlikely(!p))
3910                         goto out_overflow;
3911                 len = be32_to_cpup(p);
3912                 p = xdr_inline_decode(xdr, len);
3913                 if (unlikely(!p))
3914                         goto out_overflow;
3915                 if (group_name != NULL) {
3916                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3917                         if (group_name->data != NULL) {
3918                                 group_name->len = len;
3919                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3920                         }
3921                 } else if (len < XDR_MAX_NETOBJ) {
3922                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3923                                 ret = NFS_ATTR_FATTR_GROUP;
3924                         else
3925                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3926                                                 __func__);
3927                 } else
3928                         dprintk("%s: name too long (%u)!\n",
3929                                         __func__, len);
3930                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3931         }
3932         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3933         return ret;
3934 out_overflow:
3935         print_overflow_msg(__func__, xdr);
3936         return -EIO;
3937 }
3938
3939 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3940 {
3941         uint32_t major = 0, minor = 0;
3942         __be32 *p;
3943         int ret = 0;
3944
3945         *rdev = MKDEV(0,0);
3946         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3947                 return -EIO;
3948         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3949                 dev_t tmp;
3950
3951                 p = xdr_inline_decode(xdr, 8);
3952                 if (unlikely(!p))
3953                         goto out_overflow;
3954                 major = be32_to_cpup(p++);
3955                 minor = be32_to_cpup(p);
3956                 tmp = MKDEV(major, minor);
3957                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3958                         *rdev = tmp;
3959                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3960                 ret = NFS_ATTR_FATTR_RDEV;
3961         }
3962         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3963         return ret;
3964 out_overflow:
3965         print_overflow_msg(__func__, xdr);
3966         return -EIO;
3967 }
3968
3969 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3970 {
3971         __be32 *p;
3972         int status = 0;
3973
3974         *res = 0;
3975         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3976                 return -EIO;
3977         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3978                 p = xdr_inline_decode(xdr, 8);
3979                 if (unlikely(!p))
3980                         goto out_overflow;
3981                 xdr_decode_hyper(p, res);
3982                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3983         }
3984         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3985         return status;
3986 out_overflow:
3987         print_overflow_msg(__func__, xdr);
3988         return -EIO;
3989 }
3990
3991 static int decode_attr_space_free(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_FREE - 1U)))
3998                 return -EIO;
3999         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
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_FREE;
4005         }
4006         dprintk("%s: space free=%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_total(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_TOTAL - 1U)))
4020                 return -EIO;
4021         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
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_TOTAL;
4027         }
4028         dprintk("%s: space total=%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_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4036 {
4037         __be32 *p;
4038         int ret = 0;
4039
4040         *used = 0;
4041         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4042                 return -EIO;
4043         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4044                 p = xdr_inline_decode(xdr, 8);
4045                 if (unlikely(!p))
4046                         goto out_overflow;
4047                 xdr_decode_hyper(p, used);
4048                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4049                 ret = NFS_ATTR_FATTR_SPACE_USED;
4050         }
4051         dprintk("%s: space used=%Lu\n", __func__,
4052                         (unsigned long long)*used);
4053         return ret;
4054 out_overflow:
4055         print_overflow_msg(__func__, xdr);
4056         return -EIO;
4057 }
4058
4059 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4060 {
4061         __be32 *p;
4062         uint64_t sec;
4063         uint32_t nsec;
4064
4065         p = xdr_inline_decode(xdr, 12);
4066         if (unlikely(!p))
4067                 goto out_overflow;
4068         p = xdr_decode_hyper(p, &sec);
4069         nsec = be32_to_cpup(p);
4070         time->tv_sec = (time_t)sec;
4071         time->tv_nsec = (long)nsec;
4072         return 0;
4073 out_overflow:
4074         print_overflow_msg(__func__, xdr);
4075         return -EIO;
4076 }
4077
4078 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4079 {
4080         int status = 0;
4081
4082         time->tv_sec = 0;
4083         time->tv_nsec = 0;
4084         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4085                 return -EIO;
4086         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4087                 status = decode_attr_time(xdr, time);
4088                 if (status == 0)
4089                         status = NFS_ATTR_FATTR_ATIME;
4090                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4091         }
4092         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4093         return status;
4094 }
4095
4096 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4097 {
4098         int status = 0;
4099
4100         time->tv_sec = 0;
4101         time->tv_nsec = 0;
4102         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4103                 return -EIO;
4104         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4105                 status = decode_attr_time(xdr, time);
4106                 if (status == 0)
4107                         status = NFS_ATTR_FATTR_CTIME;
4108                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4109         }
4110         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4111         return status;
4112 }
4113
4114 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4115                                   struct timespec *time)
4116 {
4117         int status = 0;
4118
4119         time->tv_sec = 0;
4120         time->tv_nsec = 0;
4121         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4122                 return -EIO;
4123         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4124                 status = decode_attr_time(xdr, time);
4125                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4126         }
4127         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4128                 (long)time->tv_nsec);
4129         return status;
4130 }
4131
4132 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4133                                         struct nfs4_label *label)
4134 {
4135         uint32_t pi = 0;
4136         uint32_t lfs = 0;
4137         __u32 len;
4138         __be32 *p;
4139         int status = 0;
4140
4141         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4142                 return -EIO;
4143         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4144                 p = xdr_inline_decode(xdr, 4);
4145                 if (unlikely(!p))
4146                         goto out_overflow;
4147                 lfs = be32_to_cpup(p++);
4148                 p = xdr_inline_decode(xdr, 4);
4149                 if (unlikely(!p))
4150                         goto out_overflow;
4151                 pi = be32_to_cpup(p++);
4152                 p = xdr_inline_decode(xdr, 4);
4153                 if (unlikely(!p))
4154                         goto out_overflow;
4155                 len = be32_to_cpup(p++);
4156                 p = xdr_inline_decode(xdr, len);
4157                 if (unlikely(!p))
4158                         goto out_overflow;
4159                 if (len < NFS4_MAXLABELLEN) {
4160                         if (label) {
4161                                 if (label->len) {
4162                                         if (label->len < len)
4163                                                 return -ERANGE;
4164                                         memcpy(label->label, p, len);
4165                                 }
4166                                 label->len = len;
4167                                 label->pi = pi;
4168                                 label->lfs = lfs;
4169                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4170                         }
4171                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4172                 } else
4173                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4174                                         __func__, len);
4175         }
4176         if (label && label->label)
4177                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4178                         (char *)label->label, label->len, label->pi, label->lfs);
4179         return status;
4180
4181 out_overflow:
4182         print_overflow_msg(__func__, xdr);
4183         return -EIO;
4184 }
4185
4186 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4187 {
4188         int status = 0;
4189
4190         time->tv_sec = 0;
4191         time->tv_nsec = 0;
4192         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4193                 return -EIO;
4194         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4195                 status = decode_attr_time(xdr, time);
4196                 if (status == 0)
4197                         status = NFS_ATTR_FATTR_MTIME;
4198                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4199         }
4200         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4201         return status;
4202 }
4203
4204 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4205 {
4206         unsigned int attrwords = XDR_QUADLEN(attrlen);
4207         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4208
4209         if (unlikely(attrwords != nwords)) {
4210                 dprintk("%s: server returned incorrect attribute length: "
4211                         "%u %c %u\n",
4212                                 __func__,
4213                                 attrwords << 2,
4214                                 (attrwords < nwords) ? '<' : '>',
4215                                 nwords << 2);
4216                 return -EIO;
4217         }
4218         return 0;
4219 }
4220
4221 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4222 {
4223         __be32 *p;
4224
4225         p = xdr_inline_decode(xdr, 20);
4226         if (unlikely(!p))
4227                 goto out_overflow;
4228         cinfo->atomic = be32_to_cpup(p++);
4229         p = xdr_decode_hyper(p, &cinfo->before);
4230         xdr_decode_hyper(p, &cinfo->after);
4231         return 0;
4232 out_overflow:
4233         print_overflow_msg(__func__, xdr);
4234         return -EIO;
4235 }
4236
4237 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238 {
4239         __be32 *p;
4240         uint32_t supp, acc;
4241         int status;
4242
4243         status = decode_op_hdr(xdr, OP_ACCESS);
4244         if (status)
4245                 return status;
4246         p = xdr_inline_decode(xdr, 8);
4247         if (unlikely(!p))
4248                 goto out_overflow;
4249         supp = be32_to_cpup(p++);
4250         acc = be32_to_cpup(p);
4251         *supported = supp;
4252         *access = acc;
4253         return 0;
4254 out_overflow:
4255         print_overflow_msg(__func__, xdr);
4256         return -EIO;
4257 }
4258
4259 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4260 {
4261         __be32 *p;
4262
4263         p = xdr_inline_decode(xdr, len);
4264         if (likely(p)) {
4265                 memcpy(buf, p, len);
4266                 return 0;
4267         }
4268         print_overflow_msg(__func__, xdr);
4269         return -EIO;
4270 }
4271
4272 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4273 {
4274         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4275 }
4276
4277 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4278 {
4279         int status;
4280
4281         status = decode_op_hdr(xdr, OP_CLOSE);
4282         if (status != -EIO)
4283                 nfs_increment_open_seqid(status, res->seqid);
4284         if (!status)
4285                 status = decode_stateid(xdr, &res->stateid);
4286         return status;
4287 }
4288
4289 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4290 {
4291         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4292 }
4293
4294 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4295 {
4296         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4297 }
4298
4299 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4300 {
4301         int status;
4302
4303         status = decode_op_hdr(xdr, OP_COMMIT);
4304         if (!status)
4305                 status = decode_write_verifier(xdr, &res->verf->verifier);
4306         return status;
4307 }
4308
4309 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4310 {
4311         __be32 *p;
4312         uint32_t bmlen;
4313         int status;
4314
4315         status = decode_op_hdr(xdr, OP_CREATE);
4316         if (status)
4317                 return status;
4318         if ((status = decode_change_info(xdr, cinfo)))
4319                 return status;
4320         p = xdr_inline_decode(xdr, 4);
4321         if (unlikely(!p))
4322                 goto out_overflow;
4323         bmlen = be32_to_cpup(p);
4324         p = xdr_inline_decode(xdr, bmlen << 2);
4325         if (likely(p))
4326                 return 0;
4327 out_overflow:
4328         print_overflow_msg(__func__, xdr);
4329         return -EIO;
4330 }
4331
4332 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4333 {
4334         unsigned int savep;
4335         uint32_t attrlen, bitmap[3] = {0};
4336         int status;
4337
4338         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4339                 goto xdr_error;
4340         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4341                 goto xdr_error;
4342         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4343                 goto xdr_error;
4344         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4345                 goto xdr_error;
4346         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4347                                                  &res->fh_expire_type)) != 0)
4348                 goto xdr_error;
4349         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4350                 goto xdr_error;
4351         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4352                 goto xdr_error;
4353         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4354                 goto xdr_error;
4355         if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4356                                 res->exclcreat_bitmask)) != 0)
4357                 goto xdr_error;
4358         status = verify_attr_len(xdr, savep, attrlen);
4359 xdr_error:
4360         dprintk("%s: xdr returned %d!\n", __func__, -status);
4361         return status;
4362 }
4363
4364 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4365 {
4366         unsigned int savep;
4367         uint32_t attrlen, bitmap[3] = {0};
4368         int status;
4369
4370         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4371                 goto xdr_error;
4372         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4373                 goto xdr_error;
4374         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4375                 goto xdr_error;
4376
4377         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4378                 goto xdr_error;
4379         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4380                 goto xdr_error;
4381         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4382                 goto xdr_error;
4383
4384         status = -EIO;
4385         if (unlikely(bitmap[0]))
4386                 goto xdr_error;
4387
4388         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4389                 goto xdr_error;
4390         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4391                 goto xdr_error;
4392         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4393                 goto xdr_error;
4394
4395         status = verify_attr_len(xdr, savep, attrlen);
4396 xdr_error:
4397         dprintk("%s: xdr returned %d!\n", __func__, -status);
4398         return status;
4399 }
4400
4401 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4402 {
4403         unsigned int savep;
4404         uint32_t attrlen, bitmap[3] = {0};
4405         int status;
4406
4407         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4408                 goto xdr_error;
4409         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4410                 goto xdr_error;
4411         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4412                 goto xdr_error;
4413
4414         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4415                 goto xdr_error;
4416         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4417                 goto xdr_error;
4418
4419         status = verify_attr_len(xdr, savep, attrlen);
4420 xdr_error:
4421         dprintk("%s: xdr returned %d!\n", __func__, -status);
4422         return status;
4423 }
4424
4425 static int decode_threshold_hint(struct xdr_stream *xdr,
4426                                   uint32_t *bitmap,
4427                                   uint64_t *res,
4428                                   uint32_t hint_bit)
4429 {
4430         __be32 *p;
4431
4432         *res = 0;
4433         if (likely(bitmap[0] & hint_bit)) {
4434                 p = xdr_inline_decode(xdr, 8);
4435                 if (unlikely(!p))
4436                         goto out_overflow;
4437                 xdr_decode_hyper(p, res);
4438         }
4439         return 0;
4440 out_overflow:
4441         print_overflow_msg(__func__, xdr);
4442         return -EIO;
4443 }
4444
4445 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4446                                         struct nfs4_threshold *res)
4447 {
4448         __be32 *p;
4449         unsigned int savep;
4450         uint32_t bitmap[3] = {0,}, attrlen;
4451         int status;
4452
4453         /* layout type */
4454         p = xdr_inline_decode(xdr, 4);
4455         if (unlikely(!p)) {
4456                 print_overflow_msg(__func__, xdr);
4457                 return -EIO;
4458         }
4459         res->l_type = be32_to_cpup(p);
4460
4461         /* thi_hintset bitmap */
4462         status = decode_attr_bitmap(xdr, bitmap);
4463         if (status < 0)
4464                 goto xdr_error;
4465
4466         /* thi_hintlist length */
4467         status = decode_attr_length(xdr, &attrlen, &savep);
4468         if (status < 0)
4469                 goto xdr_error;
4470         /* thi_hintlist */
4471         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4472         if (status < 0)
4473                 goto xdr_error;
4474         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4475         if (status < 0)
4476                 goto xdr_error;
4477         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4478                                        THRESHOLD_RD_IO);
4479         if (status < 0)
4480                 goto xdr_error;
4481         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4482                                        THRESHOLD_WR_IO);
4483         if (status < 0)
4484                 goto xdr_error;
4485
4486         status = verify_attr_len(xdr, savep, attrlen);
4487         res->bm = bitmap[0];
4488
4489         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4490                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4491                 res->wr_io_sz);
4492 xdr_error:
4493         dprintk("%s ret=%d!\n", __func__, status);
4494         return status;
4495 }
4496
4497 /*
4498  * Thresholds on pNFS direct I/O vrs MDS I/O
4499  */
4500 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4501                                     uint32_t *bitmap,
4502                                     struct nfs4_threshold *res)
4503 {
4504         __be32 *p;
4505         int status = 0;
4506         uint32_t num;
4507
4508         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4509                 return -EIO;
4510         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4511                 /* Did the server return an unrequested attribute? */
4512                 if (unlikely(res == NULL))
4513                         return -EREMOTEIO;
4514                 p = xdr_inline_decode(xdr, 4);
4515                 if (unlikely(!p))
4516                         goto out_overflow;
4517                 num = be32_to_cpup(p);
4518                 if (num == 0)
4519                         return 0;
4520                 if (num > 1)
4521                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4522                                 "drivers per filesystem not supported\n",
4523                                 __func__);
4524
4525                 status = decode_first_threshold_item4(xdr, res);
4526                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4527         }
4528         return status;
4529 out_overflow:
4530         print_overflow_msg(__func__, xdr);
4531         return -EIO;
4532 }
4533
4534 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4535                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4536                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4537                 const struct nfs_server *server)
4538 {
4539         int status;
4540         umode_t fmode = 0;
4541         uint32_t type;
4542         int32_t err;
4543
4544         status = decode_attr_type(xdr, bitmap, &type);
4545         if (status < 0)
4546                 goto xdr_error;
4547         fattr->mode = 0;
4548         if (status != 0) {
4549                 fattr->mode |= nfs_type2fmt[type];
4550                 fattr->valid |= status;
4551         }
4552
4553         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4554         if (status < 0)
4555                 goto xdr_error;
4556         fattr->valid |= status;
4557
4558         status = decode_attr_size(xdr, bitmap, &fattr->size);
4559         if (status < 0)
4560                 goto xdr_error;
4561         fattr->valid |= status;
4562
4563         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4564         if (status < 0)
4565                 goto xdr_error;
4566         fattr->valid |= status;
4567
4568         err = 0;
4569         status = decode_attr_error(xdr, bitmap, &err);
4570         if (status < 0)
4571                 goto xdr_error;
4572
4573         status = decode_attr_filehandle(xdr, bitmap, fh);
4574         if (status < 0)
4575                 goto xdr_error;
4576
4577         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4578         if (status < 0)
4579                 goto xdr_error;
4580         fattr->valid |= status;
4581
4582         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4583         if (status < 0)
4584                 goto xdr_error;
4585         fattr->valid |= status;
4586
4587         status = -EIO;
4588         if (unlikely(bitmap[0]))
4589                 goto xdr_error;
4590
4591         status = decode_attr_mode(xdr, bitmap, &fmode);
4592         if (status < 0)
4593                 goto xdr_error;
4594         if (status != 0) {
4595                 fattr->mode |= fmode;
4596                 fattr->valid |= status;
4597         }
4598
4599         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4600         if (status < 0)
4601                 goto xdr_error;
4602         fattr->valid |= status;
4603
4604         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4605         if (status < 0)
4606                 goto xdr_error;
4607         fattr->valid |= status;
4608
4609         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4610         if (status < 0)
4611                 goto xdr_error;
4612         fattr->valid |= status;
4613
4614         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4615         if (status < 0)
4616                 goto xdr_error;
4617         fattr->valid |= status;
4618
4619         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4620         if (status < 0)
4621                 goto xdr_error;
4622         fattr->valid |= status;
4623
4624         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4625         if (status < 0)
4626                 goto xdr_error;
4627         fattr->valid |= status;
4628
4629         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4630         if (status < 0)
4631                 goto xdr_error;
4632         fattr->valid |= status;
4633
4634         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4640         if (status < 0)
4641                 goto xdr_error;
4642         fattr->valid |= status;
4643
4644         status = -EIO;
4645         if (unlikely(bitmap[1]))
4646                 goto xdr_error;
4647
4648         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4649         if (status < 0)
4650                 goto xdr_error;
4651
4652         if (label) {
4653                 status = decode_attr_security_label(xdr, bitmap, label);
4654                 if (status < 0)
4655                         goto xdr_error;
4656                 fattr->valid |= status;
4657         }
4658
4659 xdr_error:
4660         dprintk("%s: xdr returned %d\n", __func__, -status);
4661         return status;
4662 }
4663
4664 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4665                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4666                 struct nfs4_label *label, const struct nfs_server *server)
4667 {
4668         unsigned int savep;
4669         uint32_t attrlen,
4670                  bitmap[3] = {0};
4671         int status;
4672
4673         status = decode_op_hdr(xdr, OP_GETATTR);
4674         if (status < 0)
4675                 goto xdr_error;
4676
4677         status = decode_attr_bitmap(xdr, bitmap);
4678         if (status < 0)
4679                 goto xdr_error;
4680
4681         status = decode_attr_length(xdr, &attrlen, &savep);
4682         if (status < 0)
4683                 goto xdr_error;
4684
4685         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4686                                         label, server);
4687         if (status < 0)
4688                 goto xdr_error;
4689
4690         status = verify_attr_len(xdr, savep, attrlen);
4691 xdr_error:
4692         dprintk("%s: xdr returned %d\n", __func__, -status);
4693         return status;
4694 }
4695
4696 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4697                 struct nfs4_label *label, const struct nfs_server *server)
4698 {
4699         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4700 }
4701
4702 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4703                 const struct nfs_server *server)
4704 {
4705         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4706 }
4707
4708 /*
4709  * Decode potentially multiple layout types. Currently we only support
4710  * one layout driver per file system.
4711  */
4712 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4713                                          uint32_t *layouttype)
4714 {
4715         __be32 *p;
4716         int num;
4717
4718         p = xdr_inline_decode(xdr, 4);
4719         if (unlikely(!p))
4720                 goto out_overflow;
4721         num = be32_to_cpup(p);
4722
4723         /* pNFS is not supported by the underlying file system */
4724         if (num == 0) {
4725                 *layouttype = 0;
4726                 return 0;
4727         }
4728         if (num > 1)
4729                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4730                         "drivers per filesystem not supported\n", __func__);
4731
4732         /* Decode and set first layout type, move xdr->p past unused types */
4733         p = xdr_inline_decode(xdr, num * 4);
4734         if (unlikely(!p))
4735                 goto out_overflow;
4736         *layouttype = be32_to_cpup(p);
4737         return 0;
4738 out_overflow:
4739         print_overflow_msg(__func__, xdr);
4740         return -EIO;
4741 }
4742
4743 /*
4744  * The type of file system exported.
4745  * Note we must ensure that layouttype is set in any non-error case.
4746  */
4747 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4748                                 uint32_t *layouttype)
4749 {
4750         int status = 0;
4751
4752         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4753         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4754                 return -EIO;
4755         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4756                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4757                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4758         } else
4759                 *layouttype = 0;
4760         return status;
4761 }
4762
4763 /*
4764  * The prefered block size for layout directed io
4765  */
4766 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4767                                       uint32_t *res)
4768 {
4769         __be32 *p;
4770
4771         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4772         *res = 0;
4773         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4774                 p = xdr_inline_decode(xdr, 4);
4775                 if (unlikely(!p)) {
4776                         print_overflow_msg(__func__, xdr);
4777                         return -EIO;
4778                 }
4779                 *res = be32_to_cpup(p);
4780                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4781         }
4782         return 0;
4783 }
4784
4785 /*
4786  * The granularity of a CLONE operation.
4787  */
4788 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4789                                      uint32_t *res)
4790 {
4791         __be32 *p;
4792
4793         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4794         *res = 0;
4795         if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4796                 p = xdr_inline_decode(xdr, 4);
4797                 if (unlikely(!p)) {
4798                         print_overflow_msg(__func__, xdr);
4799                         return -EIO;
4800                 }
4801                 *res = be32_to_cpup(p);
4802                 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4803         }
4804         return 0;
4805 }
4806
4807 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4808 {
4809         unsigned int savep;
4810         uint32_t attrlen, bitmap[3];
4811         int status;
4812
4813         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4814                 goto xdr_error;
4815         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4816                 goto xdr_error;
4817         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4818                 goto xdr_error;
4819
4820         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4821
4822         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4823                 goto xdr_error;
4824         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4825                 goto xdr_error;
4826         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4827                 goto xdr_error;
4828         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4829         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4830                 goto xdr_error;
4831         fsinfo->wtpref = fsinfo->wtmax;
4832
4833         status = -EIO;
4834         if (unlikely(bitmap[0]))
4835                 goto xdr_error;
4836
4837         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4838         if (status != 0)
4839                 goto xdr_error;
4840         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4841         if (status != 0)
4842                 goto xdr_error;
4843
4844         status = -EIO;
4845         if (unlikely(bitmap[1]))
4846                 goto xdr_error;
4847
4848         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4849         if (status)
4850                 goto xdr_error;
4851         status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4852         if (status)
4853                 goto xdr_error;
4854
4855         status = verify_attr_len(xdr, savep, attrlen);
4856 xdr_error:
4857         dprintk("%s: xdr returned %d!\n", __func__, -status);
4858         return status;
4859 }
4860
4861 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4862 {
4863         __be32 *p;
4864         uint32_t len;
4865         int status;
4866
4867         /* Zero handle first to allow comparisons */
4868         memset(fh, 0, sizeof(*fh));
4869
4870         status = decode_op_hdr(xdr, OP_GETFH);
4871         if (status)
4872                 return status;
4873
4874         p = xdr_inline_decode(xdr, 4);
4875         if (unlikely(!p))
4876                 goto out_overflow;
4877         len = be32_to_cpup(p);
4878         if (len > NFS4_FHSIZE)
4879                 return -EIO;
4880         fh->size = len;
4881         p = xdr_inline_decode(xdr, len);
4882         if (unlikely(!p))
4883                 goto out_overflow;
4884         memcpy(fh->data, p, len);
4885         return 0;
4886 out_overflow:
4887         print_overflow_msg(__func__, xdr);
4888         return -EIO;
4889 }
4890
4891 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4892 {
4893         int status;
4894
4895         status = decode_op_hdr(xdr, OP_LINK);
4896         if (status)
4897                 return status;
4898         return decode_change_info(xdr, cinfo);
4899 }
4900
4901 /*
4902  * We create the owner, so we know a proper owner.id length is 4.
4903  */
4904 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4905 {
4906         uint64_t offset, length, clientid;
4907         __be32 *p;
4908         uint32_t namelen, type;
4909
4910         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4911         if (unlikely(!p))
4912                 goto out_overflow;
4913         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4914         p = xdr_decode_hyper(p, &length);
4915         type = be32_to_cpup(p++); /* 4 byte read */
4916         if (fl != NULL) { /* manipulate file lock */
4917                 fl->fl_start = (loff_t)offset;
4918                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4919                 if (length == ~(uint64_t)0)
4920                         fl->fl_end = OFFSET_MAX;
4921                 fl->fl_type = F_WRLCK;
4922                 if (type & 1)
4923                         fl->fl_type = F_RDLCK;
4924                 fl->fl_pid = 0;
4925         }
4926         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4927         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4928         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4929         if (likely(p))
4930                 return -NFS4ERR_DENIED;
4931 out_overflow:
4932         print_overflow_msg(__func__, xdr);
4933         return -EIO;
4934 }
4935
4936 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4937 {
4938         int status;
4939
4940         status = decode_op_hdr(xdr, OP_LOCK);
4941         if (status == -EIO)
4942                 goto out;
4943         if (status == 0) {
4944                 status = decode_stateid(xdr, &res->stateid);
4945                 if (unlikely(status))
4946                         goto out;
4947         } else if (status == -NFS4ERR_DENIED)
4948                 status = decode_lock_denied(xdr, NULL);
4949         if (res->open_seqid != NULL)
4950                 nfs_increment_open_seqid(status, res->open_seqid);
4951         nfs_increment_lock_seqid(status, res->lock_seqid);
4952 out:
4953         return status;
4954 }
4955
4956 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4957 {
4958         int status;
4959         status = decode_op_hdr(xdr, OP_LOCKT);
4960         if (status == -NFS4ERR_DENIED)
4961                 return decode_lock_denied(xdr, res->denied);
4962         return status;
4963 }
4964
4965 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4966 {
4967         int status;
4968
4969         status = decode_op_hdr(xdr, OP_LOCKU);
4970         if (status != -EIO)
4971                 nfs_increment_lock_seqid(status, res->seqid);
4972         if (status == 0)
4973                 status = decode_stateid(xdr, &res->stateid);
4974         return status;
4975 }
4976
4977 static int decode_release_lockowner(struct xdr_stream *xdr)
4978 {
4979         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4980 }
4981
4982 static int decode_lookup(struct xdr_stream *xdr)
4983 {
4984         return decode_op_hdr(xdr, OP_LOOKUP);
4985 }
4986
4987 /* This is too sick! */
4988 static int decode_space_limit(struct xdr_stream *xdr,
4989                 unsigned long *pagemod_limit)
4990 {
4991         __be32 *p;
4992         uint32_t limit_type, nblocks, blocksize;
4993         u64 maxsize = 0;
4994
4995         p = xdr_inline_decode(xdr, 12);
4996         if (unlikely(!p))
4997                 goto out_overflow;
4998         limit_type = be32_to_cpup(p++);
4999         switch (limit_type) {
5000         case NFS4_LIMIT_SIZE:
5001                 xdr_decode_hyper(p, &maxsize);
5002                 break;
5003         case NFS4_LIMIT_BLOCKS:
5004                 nblocks = be32_to_cpup(p++);
5005                 blocksize = be32_to_cpup(p);
5006                 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5007         }
5008         maxsize >>= PAGE_CACHE_SHIFT;
5009         *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5010         return 0;
5011 out_overflow:
5012         print_overflow_msg(__func__, xdr);
5013         return -EIO;
5014 }
5015
5016 static int decode_rw_delegation(struct xdr_stream *xdr,
5017                 uint32_t delegation_type,
5018                 struct nfs_openres *res)
5019 {
5020         __be32 *p;
5021         int status;
5022
5023         status = decode_stateid(xdr, &res->delegation);
5024         if (unlikely(status))
5025                 return status;
5026         p = xdr_inline_decode(xdr, 4);
5027         if (unlikely(!p))
5028                 goto out_overflow;
5029         res->do_recall = be32_to_cpup(p);
5030
5031         switch (delegation_type) {
5032         case NFS4_OPEN_DELEGATE_READ:
5033                 res->delegation_type = FMODE_READ;
5034                 break;
5035         case NFS4_OPEN_DELEGATE_WRITE:
5036                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5037                 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5038                                 return -EIO;
5039         }
5040         return decode_ace(xdr, NULL, res->server->nfs_client);
5041 out_overflow:
5042         print_overflow_msg(__func__, xdr);
5043         return -EIO;
5044 }
5045
5046 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5047 {
5048         __be32 *p;
5049         uint32_t why_no_delegation;
5050
5051         p = xdr_inline_decode(xdr, 4);
5052         if (unlikely(!p))
5053                 goto out_overflow;
5054         why_no_delegation = be32_to_cpup(p);
5055         switch (why_no_delegation) {
5056                 case WND4_CONTENTION:
5057                 case WND4_RESOURCE:
5058                         xdr_inline_decode(xdr, 4);
5059                         /* Ignore for now */
5060         }
5061         return 0;
5062 out_overflow:
5063         print_overflow_msg(__func__, xdr);
5064         return -EIO;
5065 }
5066
5067 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5068 {
5069         __be32 *p;
5070         uint32_t delegation_type;
5071
5072         p = xdr_inline_decode(xdr, 4);
5073         if (unlikely(!p))
5074                 goto out_overflow;
5075         delegation_type = be32_to_cpup(p);
5076         res->delegation_type = 0;
5077         switch (delegation_type) {
5078         case NFS4_OPEN_DELEGATE_NONE:
5079                 return 0;
5080         case NFS4_OPEN_DELEGATE_READ:
5081         case NFS4_OPEN_DELEGATE_WRITE:
5082                 return decode_rw_delegation(xdr, delegation_type, res);
5083         case NFS4_OPEN_DELEGATE_NONE_EXT:
5084                 return decode_no_delegation(xdr, res);
5085         }
5086         return -EIO;
5087 out_overflow:
5088         print_overflow_msg(__func__, xdr);
5089         return -EIO;
5090 }
5091
5092 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5093 {
5094         __be32 *p;
5095         uint32_t savewords, bmlen, i;
5096         int status;
5097
5098         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5099                 return status;
5100         nfs_increment_open_seqid(status, res->seqid);
5101         if (status)
5102                 return status;
5103         status = decode_stateid(xdr, &res->stateid);
5104         if (unlikely(status))
5105                 return status;
5106
5107         decode_change_info(xdr, &res->cinfo);
5108
5109         p = xdr_inline_decode(xdr, 8);
5110         if (unlikely(!p))
5111                 goto out_overflow;
5112         res->rflags = be32_to_cpup(p++);
5113         bmlen = be32_to_cpup(p);
5114         if (bmlen > 10)
5115                 goto xdr_error;
5116
5117         p = xdr_inline_decode(xdr, bmlen << 2);
5118         if (unlikely(!p))
5119                 goto out_overflow;
5120         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5121         for (i = 0; i < savewords; ++i)
5122                 res->attrset[i] = be32_to_cpup(p++);
5123         for (; i < NFS4_BITMAP_SIZE; i++)
5124                 res->attrset[i] = 0;
5125
5126         return decode_delegation(xdr, res);
5127 xdr_error:
5128         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5129         return -EIO;
5130 out_overflow:
5131         print_overflow_msg(__func__, xdr);
5132         return -EIO;
5133 }
5134
5135 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5136 {
5137         int status;
5138
5139         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5140         if (status != -EIO)
5141                 nfs_increment_open_seqid(status, res->seqid);
5142         if (!status)
5143                 status = decode_stateid(xdr, &res->stateid);
5144         return status;
5145 }
5146
5147 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5148 {
5149         int status;
5150
5151         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5152         if (status != -EIO)
5153                 nfs_increment_open_seqid(status, res->seqid);
5154         if (!status)
5155                 status = decode_stateid(xdr, &res->stateid);
5156         return status;
5157 }
5158
5159 static int decode_putfh(struct xdr_stream *xdr)
5160 {
5161         return decode_op_hdr(xdr, OP_PUTFH);
5162 }
5163
5164 static int decode_putrootfh(struct xdr_stream *xdr)
5165 {
5166         return decode_op_hdr(xdr, OP_PUTROOTFH);
5167 }
5168
5169 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5170                        struct nfs_pgio_res *res)
5171 {
5172         __be32 *p;
5173         uint32_t count, eof, recvd;
5174         int status;
5175
5176         status = decode_op_hdr(xdr, OP_READ);
5177         if (status)
5178                 return status;
5179         p = xdr_inline_decode(xdr, 8);
5180         if (unlikely(!p))
5181                 goto out_overflow;
5182         eof = be32_to_cpup(p++);
5183         count = be32_to_cpup(p);
5184         recvd = xdr_read_pages(xdr, count);
5185         if (count > recvd) {
5186                 dprintk("NFS: server cheating in read reply: "
5187                                 "count %u > recvd %u\n", count, recvd);
5188                 count = recvd;
5189                 eof = 0;
5190         }
5191         res->eof = eof;
5192         res->count = count;
5193         return 0;
5194 out_overflow:
5195         print_overflow_msg(__func__, xdr);
5196         return -EIO;
5197 }
5198
5199 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5200 {
5201         int             status;
5202         __be32          verf[2];
5203
5204         status = decode_op_hdr(xdr, OP_READDIR);
5205         if (!status)
5206                 status = decode_verifier(xdr, readdir->verifier.data);
5207         if (unlikely(status))
5208                 return status;
5209         memcpy(verf, readdir->verifier.data, sizeof(verf));
5210         dprintk("%s: verifier = %08x:%08x\n",
5211                         __func__, verf[0], verf[1]);
5212         return xdr_read_pages(xdr, xdr->buf->page_len);
5213 }
5214
5215 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5216 {
5217         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5218         u32 len, recvd;
5219         __be32 *p;
5220         int status;
5221
5222         status = decode_op_hdr(xdr, OP_READLINK);
5223         if (status)
5224                 return status;
5225
5226         /* Convert length of symlink */
5227         p = xdr_inline_decode(xdr, 4);
5228         if (unlikely(!p))
5229                 goto out_overflow;
5230         len = be32_to_cpup(p);
5231         if (len >= rcvbuf->page_len || len <= 0) {
5232                 dprintk("nfs: server returned giant symlink!\n");
5233                 return -ENAMETOOLONG;
5234         }
5235         recvd = xdr_read_pages(xdr, len);
5236         if (recvd < len) {
5237                 dprintk("NFS: server cheating in readlink reply: "
5238                                 "count %u > recvd %u\n", len, recvd);
5239                 return -EIO;
5240         }
5241         /*
5242          * The XDR encode routine has set things up so that
5243          * the link text will be copied directly into the
5244          * buffer.  We just have to do overflow-checking,
5245          * and and null-terminate the text (the VFS expects
5246          * null-termination).
5247          */
5248         xdr_terminate_string(rcvbuf, len);
5249         return 0;
5250 out_overflow:
5251         print_overflow_msg(__func__, xdr);
5252         return -EIO;
5253 }
5254
5255 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5256 {
5257         int status;
5258
5259         status = decode_op_hdr(xdr, OP_REMOVE);
5260         if (status)
5261                 goto out;
5262         status = decode_change_info(xdr, cinfo);
5263 out:
5264         return status;
5265 }
5266
5267 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5268               struct nfs4_change_info *new_cinfo)
5269 {
5270         int status;
5271
5272         status = decode_op_hdr(xdr, OP_RENAME);
5273         if (status)
5274                 goto out;
5275         if ((status = decode_change_info(xdr, old_cinfo)))
5276                 goto out;
5277         status = decode_change_info(xdr, new_cinfo);
5278 out:
5279         return status;
5280 }
5281
5282 static int decode_renew(struct xdr_stream *xdr)
5283 {
5284         return decode_op_hdr(xdr, OP_RENEW);
5285 }
5286
5287 static int
5288 decode_restorefh(struct xdr_stream *xdr)
5289 {
5290         return decode_op_hdr(xdr, OP_RESTOREFH);
5291 }
5292
5293 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5294                          struct nfs_getaclres *res)
5295 {
5296         unsigned int savep;
5297         uint32_t attrlen,
5298                  bitmap[3] = {0};
5299         int status;
5300         unsigned int pg_offset;
5301
5302         res->acl_len = 0;
5303         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5304                 goto out;
5305
5306         xdr_enter_page(xdr, xdr->buf->page_len);
5307
5308         /* Calculate the offset of the page data */
5309         pg_offset = xdr->buf->head[0].iov_len;
5310
5311         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5312                 goto out;
5313         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5314                 goto out;
5315
5316         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5317                 return -EIO;
5318         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5319
5320                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5321                  * are stored with the acl data to handle the problem of
5322                  * variable length bitmaps.*/
5323                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5324                 res->acl_len = attrlen;
5325
5326                 /* Check for receive buffer overflow */
5327                 if (res->acl_len > (xdr->nwords << 2) ||
5328                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5329                         res->acl_flags |= NFS4_ACL_TRUNC;
5330                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5331                                         attrlen, xdr->nwords << 2);
5332                 }
5333         } else
5334                 status = -EOPNOTSUPP;
5335
5336 out:
5337         return status;
5338 }
5339
5340 static int
5341 decode_savefh(struct xdr_stream *xdr)
5342 {
5343         return decode_op_hdr(xdr, OP_SAVEFH);
5344 }
5345
5346 static int decode_setattr(struct xdr_stream *xdr)
5347 {
5348         __be32 *p;
5349         uint32_t bmlen;
5350         int status;
5351
5352         status = decode_op_hdr(xdr, OP_SETATTR);
5353         if (status)
5354                 return status;
5355         p = xdr_inline_decode(xdr, 4);
5356         if (unlikely(!p))
5357                 goto out_overflow;
5358         bmlen = be32_to_cpup(p);
5359         p = xdr_inline_decode(xdr, bmlen << 2);
5360         if (likely(p))
5361                 return 0;
5362 out_overflow:
5363         print_overflow_msg(__func__, xdr);
5364         return -EIO;
5365 }
5366
5367 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5368 {
5369         __be32 *p;
5370         uint32_t opnum;
5371         int32_t nfserr;
5372
5373         p = xdr_inline_decode(xdr, 8);
5374         if (unlikely(!p))
5375                 goto out_overflow;
5376         opnum = be32_to_cpup(p++);
5377         if (opnum != OP_SETCLIENTID) {
5378                 dprintk("nfs: decode_setclientid: Server returned operation"
5379                         " %d\n", opnum);
5380                 return -EIO;
5381         }
5382         nfserr = be32_to_cpup(p);
5383         if (nfserr == NFS_OK) {
5384                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5385                 if (unlikely(!p))
5386                         goto out_overflow;
5387                 p = xdr_decode_hyper(p, &res->clientid);
5388                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5389         } else if (nfserr == NFSERR_CLID_INUSE) {
5390                 uint32_t len;
5391
5392                 /* skip netid string */
5393                 p = xdr_inline_decode(xdr, 4);
5394                 if (unlikely(!p))
5395                         goto out_overflow;
5396                 len = be32_to_cpup(p);
5397                 p = xdr_inline_decode(xdr, len);
5398                 if (unlikely(!p))
5399                         goto out_overflow;
5400
5401                 /* skip uaddr string */
5402                 p = xdr_inline_decode(xdr, 4);
5403                 if (unlikely(!p))
5404                         goto out_overflow;
5405                 len = be32_to_cpup(p);
5406                 p = xdr_inline_decode(xdr, len);
5407                 if (unlikely(!p))
5408                         goto out_overflow;
5409                 return -NFSERR_CLID_INUSE;
5410         } else
5411                 return nfs4_stat_to_errno(nfserr);
5412
5413         return 0;
5414 out_overflow:
5415         print_overflow_msg(__func__, xdr);
5416         return -EIO;
5417 }
5418
5419 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5420 {
5421         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5422 }
5423
5424 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5425 {
5426         __be32 *p;
5427         int status;
5428
5429         status = decode_op_hdr(xdr, OP_WRITE);
5430         if (status)
5431                 return status;
5432
5433         p = xdr_inline_decode(xdr, 8);
5434         if (unlikely(!p))
5435                 goto out_overflow;
5436         res->count = be32_to_cpup(p++);
5437         res->verf->committed = be32_to_cpup(p++);
5438         return decode_write_verifier(xdr, &res->verf->verifier);
5439 out_overflow:
5440         print_overflow_msg(__func__, xdr);
5441         return -EIO;
5442 }
5443
5444 static int decode_delegreturn(struct xdr_stream *xdr)
5445 {
5446         return decode_op_hdr(xdr, OP_DELEGRETURN);
5447 }
5448
5449 static int decode_secinfo_gss(struct xdr_stream *xdr,
5450                               struct nfs4_secinfo4 *flavor)
5451 {
5452         u32 oid_len;
5453         __be32 *p;
5454
5455         p = xdr_inline_decode(xdr, 4);
5456         if (unlikely(!p))
5457                 goto out_overflow;
5458         oid_len = be32_to_cpup(p);
5459         if (oid_len > GSS_OID_MAX_LEN)
5460                 goto out_err;
5461
5462         p = xdr_inline_decode(xdr, oid_len);
5463         if (unlikely(!p))
5464                 goto out_overflow;
5465         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5466         flavor->flavor_info.oid.len = oid_len;
5467
5468         p = xdr_inline_decode(xdr, 8);
5469         if (unlikely(!p))
5470                 goto out_overflow;
5471         flavor->flavor_info.qop = be32_to_cpup(p++);
5472         flavor->flavor_info.service = be32_to_cpup(p);
5473
5474         return 0;
5475
5476 out_overflow:
5477         print_overflow_msg(__func__, xdr);
5478         return -EIO;
5479 out_err:
5480         return -EINVAL;
5481 }
5482
5483 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5484 {
5485         struct nfs4_secinfo4 *sec_flavor;
5486         unsigned int i, num_flavors;
5487         int status;
5488         __be32 *p;
5489
5490         p = xdr_inline_decode(xdr, 4);
5491         if (unlikely(!p))
5492                 goto out_overflow;
5493
5494         res->flavors->num_flavors = 0;
5495         num_flavors = be32_to_cpup(p);
5496
5497         for (i = 0; i < num_flavors; i++) {
5498                 sec_flavor = &res->flavors->flavors[i];
5499                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5500                         break;
5501
5502                 p = xdr_inline_decode(xdr, 4);
5503                 if (unlikely(!p))
5504                         goto out_overflow;
5505                 sec_flavor->flavor = be32_to_cpup(p);
5506
5507                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5508                         status = decode_secinfo_gss(xdr, sec_flavor);
5509                         if (status)
5510                                 goto out;
5511                 }
5512                 res->flavors->num_flavors++;
5513         }
5514
5515         status = 0;
5516 out:
5517         return status;
5518 out_overflow:
5519         print_overflow_msg(__func__, xdr);
5520         return -EIO;
5521 }
5522
5523 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5524 {
5525         int status = decode_op_hdr(xdr, OP_SECINFO);
5526         if (status)
5527                 return status;
5528         return decode_secinfo_common(xdr, res);
5529 }
5530
5531 #if defined(CONFIG_NFS_V4_1)
5532 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5533 {
5534         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5535         if (status)
5536                 return status;
5537         return decode_secinfo_common(xdr, res);
5538 }
5539
5540 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5541 {
5542         __be32 *p;
5543         uint32_t bitmap_words;
5544         unsigned int i;
5545
5546         p = xdr_inline_decode(xdr, 4);
5547         bitmap_words = be32_to_cpup(p++);
5548         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5549                 return -EIO;
5550         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5551         for (i = 0; i < bitmap_words; i++)
5552                 op_map->u.words[i] = be32_to_cpup(p++);
5553
5554         return 0;
5555 }
5556
5557 static int decode_exchange_id(struct xdr_stream *xdr,
5558                               struct nfs41_exchange_id_res *res)
5559 {
5560         __be32 *p;
5561         uint32_t dummy;
5562         char *dummy_str;
5563         int status;
5564         uint32_t impl_id_count;
5565
5566         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5567         if (status)
5568                 return status;
5569
5570         p = xdr_inline_decode(xdr, 8);
5571         if (unlikely(!p))
5572                 goto out_overflow;
5573         xdr_decode_hyper(p, &res->clientid);
5574         p = xdr_inline_decode(xdr, 12);
5575         if (unlikely(!p))
5576                 goto out_overflow;
5577         res->seqid = be32_to_cpup(p++);
5578         res->flags = be32_to_cpup(p++);
5579
5580         res->state_protect.how = be32_to_cpup(p);
5581         switch (res->state_protect.how) {
5582         case SP4_NONE:
5583                 break;
5584         case SP4_MACH_CRED:
5585                 status = decode_op_map(xdr, &res->state_protect.enforce);
5586                 if (status)
5587                         return status;
5588                 status = decode_op_map(xdr, &res->state_protect.allow);
5589                 if (status)
5590                         return status;
5591                 break;
5592         default:
5593                 WARN_ON_ONCE(1);
5594                 return -EIO;
5595         }
5596
5597         /* server_owner4.so_minor_id */
5598         p = xdr_inline_decode(xdr, 8);
5599         if (unlikely(!p))
5600                 goto out_overflow;
5601         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5602
5603         /* server_owner4.so_major_id */
5604         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5605         if (unlikely(status))
5606                 return status;
5607         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5608                 return -EIO;
5609         memcpy(res->server_owner->major_id, dummy_str, dummy);
5610         res->server_owner->major_id_sz = dummy;
5611
5612         /* server_scope4 */
5613         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5614         if (unlikely(status))
5615                 return status;
5616         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5617                 return -EIO;
5618         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5619         res->server_scope->server_scope_sz = dummy;
5620
5621         /* Implementation Id */
5622         p = xdr_inline_decode(xdr, 4);
5623         if (unlikely(!p))
5624                 goto out_overflow;
5625         impl_id_count = be32_to_cpup(p++);
5626
5627         if (impl_id_count) {
5628                 /* nii_domain */
5629                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5630                 if (unlikely(status))
5631                         return status;
5632                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5633                         return -EIO;
5634                 memcpy(res->impl_id->domain, dummy_str, dummy);
5635
5636                 /* nii_name */
5637                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5638                 if (unlikely(status))
5639                         return status;
5640                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5641                         return -EIO;
5642                 memcpy(res->impl_id->name, dummy_str, dummy);
5643
5644                 /* nii_date */
5645                 p = xdr_inline_decode(xdr, 12);
5646                 if (unlikely(!p))
5647                         goto out_overflow;
5648                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5649                 res->impl_id->date.nseconds = be32_to_cpup(p);
5650
5651                 /* if there's more than one entry, ignore the rest */
5652         }
5653         return 0;
5654 out_overflow:
5655         print_overflow_msg(__func__, xdr);
5656         return -EIO;
5657 }
5658
5659 static int decode_chan_attrs(struct xdr_stream *xdr,
5660                              struct nfs4_channel_attrs *attrs)
5661 {
5662         __be32 *p;
5663         u32 nr_attrs, val;
5664
5665         p = xdr_inline_decode(xdr, 28);
5666         if (unlikely(!p))
5667                 goto out_overflow;
5668         val = be32_to_cpup(p++);        /* headerpadsz */
5669         if (val)
5670                 return -EINVAL;         /* no support for header padding yet */
5671         attrs->max_rqst_sz = be32_to_cpup(p++);
5672         attrs->max_resp_sz = be32_to_cpup(p++);
5673         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5674         attrs->max_ops = be32_to_cpup(p++);
5675         attrs->max_reqs = be32_to_cpup(p++);
5676         nr_attrs = be32_to_cpup(p);
5677         if (unlikely(nr_attrs > 1)) {
5678                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5679                         "count %u\n", __func__, nr_attrs);
5680                 return -EINVAL;
5681         }
5682         if (nr_attrs == 1) {
5683                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5684                 if (unlikely(!p))
5685                         goto out_overflow;
5686         }
5687         return 0;
5688 out_overflow:
5689         print_overflow_msg(__func__, xdr);
5690         return -EIO;
5691 }
5692
5693 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5694 {
5695         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5696 }
5697
5698 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5699                                 struct nfs41_bind_conn_to_session_res *res)
5700 {
5701         __be32 *p;
5702         int status;
5703
5704         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5705         if (!status)
5706                 status = decode_sessionid(xdr, &res->sessionid);
5707         if (unlikely(status))
5708                 return status;
5709
5710         /* dir flags, rdma mode bool */
5711         p = xdr_inline_decode(xdr, 8);
5712         if (unlikely(!p))
5713                 goto out_overflow;
5714
5715         res->dir = be32_to_cpup(p++);
5716         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5717                 return -EIO;
5718         if (be32_to_cpup(p) == 0)
5719                 res->use_conn_in_rdma_mode = false;
5720         else
5721                 res->use_conn_in_rdma_mode = true;
5722
5723         return 0;
5724 out_overflow:
5725         print_overflow_msg(__func__, xdr);
5726         return -EIO;
5727 }
5728
5729 static int decode_create_session(struct xdr_stream *xdr,
5730                                  struct nfs41_create_session_res *res)
5731 {
5732         __be32 *p;
5733         int status;
5734
5735         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5736         if (!status)
5737                 status = decode_sessionid(xdr, &res->sessionid);
5738         if (unlikely(status))
5739                 return status;
5740
5741         /* seqid, flags */
5742         p = xdr_inline_decode(xdr, 8);
5743         if (unlikely(!p))
5744                 goto out_overflow;
5745         res->seqid = be32_to_cpup(p++);
5746         res->flags = be32_to_cpup(p);
5747
5748         /* Channel attributes */
5749         status = decode_chan_attrs(xdr, &res->fc_attrs);
5750         if (!status)
5751                 status = decode_chan_attrs(xdr, &res->bc_attrs);
5752         return status;
5753 out_overflow:
5754         print_overflow_msg(__func__, xdr);
5755         return -EIO;
5756 }
5757
5758 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5759 {
5760         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5761 }
5762
5763 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5764 {
5765         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5766 }
5767
5768 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5769 {
5770         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5771 }
5772 #endif /* CONFIG_NFS_V4_1 */
5773
5774 static int decode_sequence(struct xdr_stream *xdr,
5775                            struct nfs4_sequence_res *res,
5776                            struct rpc_rqst *rqstp)
5777 {
5778 #if defined(CONFIG_NFS_V4_1)
5779         struct nfs4_session *session;
5780         struct nfs4_sessionid id;
5781         u32 dummy;
5782         int status;
5783         __be32 *p;
5784
5785         if (res->sr_slot == NULL)
5786                 return 0;
5787         if (!res->sr_slot->table->session)
5788                 return 0;
5789
5790         status = decode_op_hdr(xdr, OP_SEQUENCE);
5791         if (!status)
5792                 status = decode_sessionid(xdr, &id);
5793         if (unlikely(status))
5794                 goto out_err;
5795
5796         /*
5797          * If the server returns different values for sessionID, slotID or
5798          * sequence number, the server is looney tunes.
5799          */
5800         status = -EREMOTEIO;
5801         session = res->sr_slot->table->session;
5802
5803         if (memcmp(id.data, session->sess_id.data,
5804                    NFS4_MAX_SESSIONID_LEN)) {
5805                 dprintk("%s Invalid session id\n", __func__);
5806                 goto out_err;
5807         }
5808
5809         p = xdr_inline_decode(xdr, 20);
5810         if (unlikely(!p))
5811                 goto out_overflow;
5812
5813         /* seqid */
5814         dummy = be32_to_cpup(p++);
5815         if (dummy != res->sr_slot->seq_nr) {
5816                 dprintk("%s Invalid sequence number\n", __func__);
5817                 goto out_err;
5818         }
5819         /* slot id */
5820         dummy = be32_to_cpup(p++);
5821         if (dummy != res->sr_slot->slot_nr) {
5822                 dprintk("%s Invalid slot id\n", __func__);
5823                 goto out_err;
5824         }
5825         /* highest slot id */
5826         res->sr_highest_slotid = be32_to_cpup(p++);
5827         /* target highest slot id */
5828         res->sr_target_highest_slotid = be32_to_cpup(p++);
5829         /* result flags */
5830         res->sr_status_flags = be32_to_cpup(p);
5831         status = 0;
5832 out_err:
5833         res->sr_status = status;
5834         return status;
5835 out_overflow:
5836         print_overflow_msg(__func__, xdr);
5837         status = -EIO;
5838         goto out_err;
5839 #else  /* CONFIG_NFS_V4_1 */
5840         return 0;
5841 #endif /* CONFIG_NFS_V4_1 */
5842 }
5843
5844 #if defined(CONFIG_NFS_V4_1)
5845 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5846                                 struct nfs4_getdeviceinfo_res *res)
5847 {
5848         struct pnfs_device *pdev = res->pdev;
5849         __be32 *p;
5850         uint32_t len, type;
5851         int status;
5852
5853         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5854         if (status) {
5855                 if (status == -ETOOSMALL) {
5856                         p = xdr_inline_decode(xdr, 4);
5857                         if (unlikely(!p))
5858                                 goto out_overflow;
5859                         pdev->mincount = be32_to_cpup(p);
5860                         dprintk("%s: Min count too small. mincnt = %u\n",
5861                                 __func__, pdev->mincount);
5862                 }
5863                 return status;
5864         }
5865
5866         p = xdr_inline_decode(xdr, 8);
5867         if (unlikely(!p))
5868                 goto out_overflow;
5869         type = be32_to_cpup(p++);
5870         if (type != pdev->layout_type) {
5871                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5872                         __func__, pdev->layout_type, type);
5873                 return -EINVAL;
5874         }
5875         /*
5876          * Get the length of the opaque device_addr4. xdr_read_pages places
5877          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5878          * and places the remaining xdr data in xdr_buf->tail
5879          */
5880         pdev->mincount = be32_to_cpup(p);
5881         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5882                 goto out_overflow;
5883
5884         /* Parse notification bitmap, verifying that it is zero. */
5885         p = xdr_inline_decode(xdr, 4);
5886         if (unlikely(!p))
5887                 goto out_overflow;
5888         len = be32_to_cpup(p);
5889         if (len) {
5890                 uint32_t i;
5891
5892                 p = xdr_inline_decode(xdr, 4 * len);
5893                 if (unlikely(!p))
5894                         goto out_overflow;
5895
5896                 res->notification = be32_to_cpup(p++);
5897                 for (i = 1; i < len; i++) {
5898                         if (be32_to_cpup(p++)) {
5899                                 dprintk("%s: unsupported notification\n",
5900                                         __func__);
5901                                 return -EIO;
5902                         }
5903                 }
5904         }
5905         return 0;
5906 out_overflow:
5907         print_overflow_msg(__func__, xdr);
5908         return -EIO;
5909 }
5910
5911 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5912                             struct nfs4_layoutget_res *res)
5913 {
5914         __be32 *p;
5915         int status;
5916         u32 layout_count;
5917         u32 recvd;
5918
5919         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5920         if (status)
5921                 return status;
5922         p = xdr_inline_decode(xdr, 4);
5923         if (unlikely(!p))
5924                 goto out_overflow;
5925         res->return_on_close = be32_to_cpup(p);
5926         decode_stateid(xdr, &res->stateid);
5927         p = xdr_inline_decode(xdr, 4);
5928         if (unlikely(!p))
5929                 goto out_overflow;
5930         layout_count = be32_to_cpup(p);
5931         if (!layout_count) {
5932                 dprintk("%s: server responded with empty layout array\n",
5933                         __func__);
5934                 return -EINVAL;
5935         }
5936
5937         p = xdr_inline_decode(xdr, 28);
5938         if (unlikely(!p))
5939                 goto out_overflow;
5940         p = xdr_decode_hyper(p, &res->range.offset);
5941         p = xdr_decode_hyper(p, &res->range.length);
5942         res->range.iomode = be32_to_cpup(p++);
5943         res->type = be32_to_cpup(p++);
5944         res->layoutp->len = be32_to_cpup(p);
5945
5946         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5947                 __func__,
5948                 (unsigned long)res->range.offset,
5949                 (unsigned long)res->range.length,
5950                 res->range.iomode,
5951                 res->type,
5952                 res->layoutp->len);
5953
5954         recvd = xdr_read_pages(xdr, res->layoutp->len);
5955         if (res->layoutp->len > recvd) {
5956                 dprintk("NFS: server cheating in layoutget reply: "
5957                                 "layout len %u > recvd %u\n",
5958                                 res->layoutp->len, recvd);
5959                 return -EINVAL;
5960         }
5961
5962         if (layout_count > 1) {
5963                 /* We only handle a length one array at the moment.  Any
5964                  * further entries are just ignored.  Note that this means
5965                  * the client may see a response that is less than the
5966                  * minimum it requested.
5967                  */
5968                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5969                         __func__, layout_count);
5970         }
5971
5972         return 0;
5973 out_overflow:
5974         print_overflow_msg(__func__, xdr);
5975         return -EIO;
5976 }
5977
5978 static int decode_layoutreturn(struct xdr_stream *xdr,
5979                                struct nfs4_layoutreturn_res *res)
5980 {
5981         __be32 *p;
5982         int status;
5983
5984         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5985         if (status)
5986                 return status;
5987         p = xdr_inline_decode(xdr, 4);
5988         if (unlikely(!p))
5989                 goto out_overflow;
5990         res->lrs_present = be32_to_cpup(p);
5991         if (res->lrs_present)
5992                 status = decode_stateid(xdr, &res->stateid);
5993         return status;
5994 out_overflow:
5995         print_overflow_msg(__func__, xdr);
5996         return -EIO;
5997 }
5998
5999 static int decode_layoutcommit(struct xdr_stream *xdr,
6000                                struct rpc_rqst *req,
6001                                struct nfs4_layoutcommit_res *res)
6002 {
6003         __be32 *p;
6004         __u32 sizechanged;
6005         int status;
6006
6007         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6008         res->status = status;
6009         if (status)
6010                 return status;
6011
6012         p = xdr_inline_decode(xdr, 4);
6013         if (unlikely(!p))
6014                 goto out_overflow;
6015         sizechanged = be32_to_cpup(p);
6016
6017         if (sizechanged) {
6018                 /* throw away new size */
6019                 p = xdr_inline_decode(xdr, 8);
6020                 if (unlikely(!p))
6021                         goto out_overflow;
6022         }
6023         return 0;
6024 out_overflow:
6025         print_overflow_msg(__func__, xdr);
6026         return -EIO;
6027 }
6028
6029 static int decode_test_stateid(struct xdr_stream *xdr,
6030                                struct nfs41_test_stateid_res *res)
6031 {
6032         __be32 *p;
6033         int status;
6034         int num_res;
6035
6036         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6037         if (status)
6038                 return status;
6039
6040         p = xdr_inline_decode(xdr, 4);
6041         if (unlikely(!p))
6042                 goto out_overflow;
6043         num_res = be32_to_cpup(p++);
6044         if (num_res != 1)
6045                 goto out;
6046
6047         p = xdr_inline_decode(xdr, 4);
6048         if (unlikely(!p))
6049                 goto out_overflow;
6050         res->status = be32_to_cpup(p++);
6051
6052         return status;
6053 out_overflow:
6054         print_overflow_msg(__func__, xdr);
6055 out:
6056         return -EIO;
6057 }
6058
6059 static int decode_free_stateid(struct xdr_stream *xdr,
6060                                struct nfs41_free_stateid_res *res)
6061 {
6062         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6063         return res->status;
6064 }
6065 #endif /* CONFIG_NFS_V4_1 */
6066
6067 /*
6068  * END OF "GENERIC" DECODE ROUTINES.
6069  */
6070
6071 /*
6072  * Decode OPEN_DOWNGRADE response
6073  */
6074 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6075                                        struct xdr_stream *xdr,
6076                                        struct nfs_closeres *res)
6077 {
6078         struct compound_hdr hdr;
6079         int status;
6080
6081         status = decode_compound_hdr(xdr, &hdr);
6082         if (status)
6083                 goto out;
6084         status = decode_sequence(xdr, &res->seq_res, rqstp);
6085         if (status)
6086                 goto out;
6087         status = decode_putfh(xdr);
6088         if (status)
6089                 goto out;
6090         status = decode_open_downgrade(xdr, res);
6091         if (status != 0)
6092                 goto out;
6093         decode_getfattr(xdr, res->fattr, res->server);
6094 out:
6095         return status;
6096 }
6097
6098 /*
6099  * Decode ACCESS response
6100  */
6101 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6102                                struct nfs4_accessres *res)
6103 {
6104         struct compound_hdr hdr;
6105         int status;
6106
6107         status = decode_compound_hdr(xdr, &hdr);
6108         if (status)
6109                 goto out;
6110         status = decode_sequence(xdr, &res->seq_res, rqstp);
6111         if (status)
6112                 goto out;
6113         status = decode_putfh(xdr);
6114         if (status != 0)
6115                 goto out;
6116         status = decode_access(xdr, &res->supported, &res->access);
6117         if (status != 0)
6118                 goto out;
6119         decode_getfattr(xdr, res->fattr, res->server);
6120 out:
6121         return status;
6122 }
6123
6124 /*
6125  * Decode LOOKUP response
6126  */
6127 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6128                                struct nfs4_lookup_res *res)
6129 {
6130         struct compound_hdr hdr;
6131         int status;
6132
6133         status = decode_compound_hdr(xdr, &hdr);
6134         if (status)
6135                 goto out;
6136         status = decode_sequence(xdr, &res->seq_res, rqstp);
6137         if (status)
6138                 goto out;
6139         status = decode_putfh(xdr);
6140         if (status)
6141                 goto out;
6142         status = decode_lookup(xdr);
6143         if (status)
6144                 goto out;
6145         status = decode_getfh(xdr, res->fh);
6146         if (status)
6147                 goto out;
6148         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6149 out:
6150         return status;
6151 }
6152
6153 /*
6154  * Decode LOOKUP_ROOT response
6155  */
6156 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6157                                     struct xdr_stream *xdr,
6158                                     struct nfs4_lookup_res *res)
6159 {
6160         struct compound_hdr hdr;
6161         int status;
6162
6163         status = decode_compound_hdr(xdr, &hdr);
6164         if (status)
6165                 goto out;
6166         status = decode_sequence(xdr, &res->seq_res, rqstp);
6167         if (status)
6168                 goto out;
6169         status = decode_putrootfh(xdr);
6170         if (status)
6171                 goto out;
6172         status = decode_getfh(xdr, res->fh);
6173         if (status == 0)
6174                 status = decode_getfattr_label(xdr, res->fattr,
6175                                                 res->label, res->server);
6176 out:
6177         return status;
6178 }
6179
6180 /*
6181  * Decode REMOVE response
6182  */
6183 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6184                                struct nfs_removeres *res)
6185 {
6186         struct compound_hdr hdr;
6187         int status;
6188
6189         status = decode_compound_hdr(xdr, &hdr);
6190         if (status)
6191                 goto out;
6192         status = decode_sequence(xdr, &res->seq_res, rqstp);
6193         if (status)
6194                 goto out;
6195         status = decode_putfh(xdr);
6196         if (status)
6197                 goto out;
6198         status = decode_remove(xdr, &res->cinfo);
6199 out:
6200         return status;
6201 }
6202
6203 /*
6204  * Decode RENAME response
6205  */
6206 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6207                                struct nfs_renameres *res)
6208 {
6209         struct compound_hdr hdr;
6210         int status;
6211
6212         status = decode_compound_hdr(xdr, &hdr);
6213         if (status)
6214                 goto out;
6215         status = decode_sequence(xdr, &res->seq_res, rqstp);
6216         if (status)
6217                 goto out;
6218         status = decode_putfh(xdr);
6219         if (status)
6220                 goto out;
6221         status = decode_savefh(xdr);
6222         if (status)
6223                 goto out;
6224         status = decode_putfh(xdr);
6225         if (status)
6226                 goto out;
6227         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6228 out:
6229         return status;
6230 }
6231
6232 /*
6233  * Decode LINK response
6234  */
6235 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6236                              struct nfs4_link_res *res)
6237 {
6238         struct compound_hdr hdr;
6239         int status;
6240
6241         status = decode_compound_hdr(xdr, &hdr);
6242         if (status)
6243                 goto out;
6244         status = decode_sequence(xdr, &res->seq_res, rqstp);
6245         if (status)
6246                 goto out;
6247         status = decode_putfh(xdr);
6248         if (status)
6249                 goto out;
6250         status = decode_savefh(xdr);
6251         if (status)
6252                 goto out;
6253         status = decode_putfh(xdr);
6254         if (status)
6255                 goto out;
6256         status = decode_link(xdr, &res->cinfo);
6257         if (status)
6258                 goto out;
6259         /*
6260          * Note order: OP_LINK leaves the directory as the current
6261          *             filehandle.
6262          */
6263         status = decode_restorefh(xdr);
6264         if (status)
6265                 goto out;
6266         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6267 out:
6268         return status;
6269 }
6270
6271 /*
6272  * Decode CREATE response
6273  */
6274 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6275                                struct nfs4_create_res *res)
6276 {
6277         struct compound_hdr hdr;
6278         int status;
6279
6280         status = decode_compound_hdr(xdr, &hdr);
6281         if (status)
6282                 goto out;
6283         status = decode_sequence(xdr, &res->seq_res, rqstp);
6284         if (status)
6285                 goto out;
6286         status = decode_putfh(xdr);
6287         if (status)
6288                 goto out;
6289         status = decode_create(xdr, &res->dir_cinfo);
6290         if (status)
6291                 goto out;
6292         status = decode_getfh(xdr, res->fh);
6293         if (status)
6294                 goto out;
6295         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6296 out:
6297         return status;
6298 }
6299
6300 /*
6301  * Decode SYMLINK response
6302  */
6303 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6304                                 struct nfs4_create_res *res)
6305 {
6306         return nfs4_xdr_dec_create(rqstp, xdr, res);
6307 }
6308
6309 /*
6310  * Decode GETATTR response
6311  */
6312 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6313                                 struct nfs4_getattr_res *res)
6314 {
6315         struct compound_hdr hdr;
6316         int status;
6317
6318         status = decode_compound_hdr(xdr, &hdr);
6319         if (status)
6320                 goto out;
6321         status = decode_sequence(xdr, &res->seq_res, rqstp);
6322         if (status)
6323                 goto out;
6324         status = decode_putfh(xdr);
6325         if (status)
6326                 goto out;
6327         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6328 out:
6329         return status;
6330 }
6331
6332 /*
6333  * Encode an SETACL request
6334  */
6335 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6336                                 struct nfs_setaclargs *args)
6337 {
6338         struct compound_hdr hdr = {
6339                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6340         };
6341
6342         encode_compound_hdr(xdr, req, &hdr);
6343         encode_sequence(xdr, &args->seq_args, &hdr);
6344         encode_putfh(xdr, args->fh, &hdr);
6345         encode_setacl(xdr, args, &hdr);
6346         encode_nops(&hdr);
6347 }
6348
6349 /*
6350  * Decode SETACL response
6351  */
6352 static int
6353 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6354                     struct nfs_setaclres *res)
6355 {
6356         struct compound_hdr hdr;
6357         int status;
6358
6359         status = decode_compound_hdr(xdr, &hdr);
6360         if (status)
6361                 goto out;
6362         status = decode_sequence(xdr, &res->seq_res, rqstp);
6363         if (status)
6364                 goto out;
6365         status = decode_putfh(xdr);
6366         if (status)
6367                 goto out;
6368         status = decode_setattr(xdr);
6369 out:
6370         return status;
6371 }
6372
6373 /*
6374  * Decode GETACL response
6375  */
6376 static int
6377 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6378                     struct nfs_getaclres *res)
6379 {
6380         struct compound_hdr hdr;
6381         int status;
6382
6383         if (res->acl_scratch != NULL) {
6384                 void *p = page_address(res->acl_scratch);
6385                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6386         }
6387         status = decode_compound_hdr(xdr, &hdr);
6388         if (status)
6389                 goto out;
6390         status = decode_sequence(xdr, &res->seq_res, rqstp);
6391         if (status)
6392                 goto out;
6393         status = decode_putfh(xdr);
6394         if (status)
6395                 goto out;
6396         status = decode_getacl(xdr, rqstp, res);
6397
6398 out:
6399         return status;
6400 }
6401
6402 /*
6403  * Decode CLOSE response
6404  */
6405 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6406                               struct nfs_closeres *res)
6407 {
6408         struct compound_hdr hdr;
6409         int status;
6410
6411         status = decode_compound_hdr(xdr, &hdr);
6412         if (status)
6413                 goto out;
6414         status = decode_sequence(xdr, &res->seq_res, rqstp);
6415         if (status)
6416                 goto out;
6417         status = decode_putfh(xdr);
6418         if (status)
6419                 goto out;
6420         status = decode_close(xdr, res);
6421         if (status != 0)
6422                 goto out;
6423         /*
6424          * Note: Server may do delete on close for this file
6425          *      in which case the getattr call will fail with
6426          *      an ESTALE error. Shouldn't be a problem,
6427          *      though, since fattr->valid will remain unset.
6428          */
6429         decode_getfattr(xdr, res->fattr, res->server);
6430 out:
6431         return status;
6432 }
6433
6434 /*
6435  * Decode OPEN response
6436  */
6437 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6438                              struct nfs_openres *res)
6439 {
6440         struct compound_hdr hdr;
6441         int status;
6442
6443         status = decode_compound_hdr(xdr, &hdr);
6444         if (status)
6445                 goto out;
6446         status = decode_sequence(xdr, &res->seq_res, rqstp);
6447         if (status)
6448                 goto out;
6449         status = decode_putfh(xdr);
6450         if (status)
6451                 goto out;
6452         status = decode_open(xdr, res);
6453         if (status)
6454                 goto out;
6455         status = decode_getfh(xdr, &res->fh);
6456         if (status)
6457                 goto out;
6458         if (res->access_request)
6459                 decode_access(xdr, &res->access_supported, &res->access_result);
6460         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6461 out:
6462         return status;
6463 }
6464
6465 /*
6466  * Decode OPEN_CONFIRM response
6467  */
6468 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6469                                      struct xdr_stream *xdr,
6470                                      struct nfs_open_confirmres *res)
6471 {
6472         struct compound_hdr hdr;
6473         int status;
6474
6475         status = decode_compound_hdr(xdr, &hdr);
6476         if (status)
6477                 goto out;
6478         status = decode_putfh(xdr);
6479         if (status)
6480                 goto out;
6481         status = decode_open_confirm(xdr, res);
6482 out:
6483         return status;
6484 }
6485
6486 /*
6487  * Decode OPEN response
6488  */
6489 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6490                                     struct xdr_stream *xdr,
6491                                     struct nfs_openres *res)
6492 {
6493         struct compound_hdr hdr;
6494         int status;
6495
6496         status = decode_compound_hdr(xdr, &hdr);
6497         if (status)
6498                 goto out;
6499         status = decode_sequence(xdr, &res->seq_res, rqstp);
6500         if (status)
6501                 goto out;
6502         status = decode_putfh(xdr);
6503         if (status)
6504                 goto out;
6505         status = decode_open(xdr, res);
6506         if (status)
6507                 goto out;
6508         if (res->access_request)
6509                 decode_access(xdr, &res->access_supported, &res->access_result);
6510         decode_getfattr(xdr, res->f_attr, res->server);
6511 out:
6512         return status;
6513 }
6514
6515 /*
6516  * Decode SETATTR response
6517  */
6518 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6519                                 struct xdr_stream *xdr,
6520                                 struct nfs_setattrres *res)
6521 {
6522         struct compound_hdr hdr;
6523         int status;
6524
6525         status = decode_compound_hdr(xdr, &hdr);
6526         if (status)
6527                 goto out;
6528         status = decode_sequence(xdr, &res->seq_res, rqstp);
6529         if (status)
6530                 goto out;
6531         status = decode_putfh(xdr);
6532         if (status)
6533                 goto out;
6534         status = decode_setattr(xdr);
6535         if (status)
6536                 goto out;
6537         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6538 out:
6539         return status;
6540 }
6541
6542 /*
6543  * Decode LOCK response
6544  */
6545 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6546                              struct nfs_lock_res *res)
6547 {
6548         struct compound_hdr hdr;
6549         int status;
6550
6551         status = decode_compound_hdr(xdr, &hdr);
6552         if (status)
6553                 goto out;
6554         status = decode_sequence(xdr, &res->seq_res, rqstp);
6555         if (status)
6556                 goto out;
6557         status = decode_putfh(xdr);
6558         if (status)
6559                 goto out;
6560         status = decode_lock(xdr, res);
6561 out:
6562         return status;
6563 }
6564
6565 /*
6566  * Decode LOCKT response
6567  */
6568 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6569                               struct nfs_lockt_res *res)
6570 {
6571         struct compound_hdr hdr;
6572         int status;
6573
6574         status = decode_compound_hdr(xdr, &hdr);
6575         if (status)
6576                 goto out;
6577         status = decode_sequence(xdr, &res->seq_res, rqstp);
6578         if (status)
6579                 goto out;
6580         status = decode_putfh(xdr);
6581         if (status)
6582                 goto out;
6583         status = decode_lockt(xdr, res);
6584 out:
6585         return status;
6586 }
6587
6588 /*
6589  * Decode LOCKU response
6590  */
6591 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6592                               struct nfs_locku_res *res)
6593 {
6594         struct compound_hdr hdr;
6595         int status;
6596
6597         status = decode_compound_hdr(xdr, &hdr);
6598         if (status)
6599                 goto out;
6600         status = decode_sequence(xdr, &res->seq_res, rqstp);
6601         if (status)
6602                 goto out;
6603         status = decode_putfh(xdr);
6604         if (status)
6605                 goto out;
6606         status = decode_locku(xdr, res);
6607 out:
6608         return status;
6609 }
6610
6611 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6612                                           struct xdr_stream *xdr, void *dummy)
6613 {
6614         struct compound_hdr hdr;
6615         int status;
6616
6617         status = decode_compound_hdr(xdr, &hdr);
6618         if (!status)
6619                 status = decode_release_lockowner(xdr);
6620         return status;
6621 }
6622
6623 /*
6624  * Decode READLINK response
6625  */
6626 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6627                                  struct xdr_stream *xdr,
6628                                  struct nfs4_readlink_res *res)
6629 {
6630         struct compound_hdr hdr;
6631         int status;
6632
6633         status = decode_compound_hdr(xdr, &hdr);
6634         if (status)
6635                 goto out;
6636         status = decode_sequence(xdr, &res->seq_res, rqstp);
6637         if (status)
6638                 goto out;
6639         status = decode_putfh(xdr);
6640         if (status)
6641                 goto out;
6642         status = decode_readlink(xdr, rqstp);
6643 out:
6644         return status;
6645 }
6646
6647 /*
6648  * Decode READDIR response
6649  */
6650 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6651                                 struct nfs4_readdir_res *res)
6652 {
6653         struct compound_hdr hdr;
6654         int status;
6655
6656         status = decode_compound_hdr(xdr, &hdr);
6657         if (status)
6658                 goto out;
6659         status = decode_sequence(xdr, &res->seq_res, rqstp);
6660         if (status)
6661                 goto out;
6662         status = decode_putfh(xdr);
6663         if (status)
6664                 goto out;
6665         status = decode_readdir(xdr, rqstp, res);
6666 out:
6667         return status;
6668 }
6669
6670 /*
6671  * Decode Read response
6672  */
6673 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6674                              struct nfs_pgio_res *res)
6675 {
6676         struct compound_hdr hdr;
6677         int status;
6678
6679         status = decode_compound_hdr(xdr, &hdr);
6680         res->op_status = hdr.status;
6681         if (status)
6682                 goto out;
6683         status = decode_sequence(xdr, &res->seq_res, rqstp);
6684         if (status)
6685                 goto out;
6686         status = decode_putfh(xdr);
6687         if (status)
6688                 goto out;
6689         status = decode_read(xdr, rqstp, res);
6690         if (!status)
6691                 status = res->count;
6692 out:
6693         return status;
6694 }
6695
6696 /*
6697  * Decode WRITE response
6698  */
6699 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6700                               struct nfs_pgio_res *res)
6701 {
6702         struct compound_hdr hdr;
6703         int status;
6704
6705         status = decode_compound_hdr(xdr, &hdr);
6706         res->op_status = hdr.status;
6707         if (status)
6708                 goto out;
6709         status = decode_sequence(xdr, &res->seq_res, rqstp);
6710         if (status)
6711                 goto out;
6712         status = decode_putfh(xdr);
6713         if (status)
6714                 goto out;
6715         status = decode_write(xdr, res);
6716         if (status)
6717                 goto out;
6718         if (res->fattr)
6719                 decode_getfattr(xdr, res->fattr, res->server);
6720         if (!status)
6721                 status = res->count;
6722 out:
6723         return status;
6724 }
6725
6726 /*
6727  * Decode COMMIT response
6728  */
6729 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6730                                struct nfs_commitres *res)
6731 {
6732         struct compound_hdr hdr;
6733         int status;
6734
6735         status = decode_compound_hdr(xdr, &hdr);
6736         res->op_status = hdr.status;
6737         if (status)
6738                 goto out;
6739         status = decode_sequence(xdr, &res->seq_res, rqstp);
6740         if (status)
6741                 goto out;
6742         status = decode_putfh(xdr);
6743         if (status)
6744                 goto out;
6745         status = decode_commit(xdr, res);
6746 out:
6747         return status;
6748 }
6749
6750 /*
6751  * Decode FSINFO response
6752  */
6753 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6754                                struct nfs4_fsinfo_res *res)
6755 {
6756         struct compound_hdr hdr;
6757         int status;
6758
6759         status = decode_compound_hdr(xdr, &hdr);
6760         if (!status)
6761                 status = decode_sequence(xdr, &res->seq_res, req);
6762         if (!status)
6763                 status = decode_putfh(xdr);
6764         if (!status)
6765                 status = decode_fsinfo(xdr, res->fsinfo);
6766         return status;
6767 }
6768
6769 /*
6770  * Decode PATHCONF response
6771  */
6772 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6773                                  struct nfs4_pathconf_res *res)
6774 {
6775         struct compound_hdr hdr;
6776         int status;
6777
6778         status = decode_compound_hdr(xdr, &hdr);
6779         if (!status)
6780                 status = decode_sequence(xdr, &res->seq_res, req);
6781         if (!status)
6782                 status = decode_putfh(xdr);
6783         if (!status)
6784                 status = decode_pathconf(xdr, res->pathconf);
6785         return status;
6786 }
6787
6788 /*
6789  * Decode STATFS response
6790  */
6791 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6792                                struct nfs4_statfs_res *res)
6793 {
6794         struct compound_hdr hdr;
6795         int status;
6796
6797         status = decode_compound_hdr(xdr, &hdr);
6798         if (!status)
6799                 status = decode_sequence(xdr, &res->seq_res, req);
6800         if (!status)
6801                 status = decode_putfh(xdr);
6802         if (!status)
6803                 status = decode_statfs(xdr, res->fsstat);
6804         return status;
6805 }
6806
6807 /*
6808  * Decode GETATTR_BITMAP response
6809  */
6810 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6811                                     struct xdr_stream *xdr,
6812                                     struct nfs4_server_caps_res *res)
6813 {
6814         struct compound_hdr hdr;
6815         int status;
6816
6817         status = decode_compound_hdr(xdr, &hdr);
6818         if (status)
6819                 goto out;
6820         status = decode_sequence(xdr, &res->seq_res, req);
6821         if (status)
6822                 goto out;
6823         status = decode_putfh(xdr);
6824         if (status)
6825                 goto out;
6826         status = decode_server_caps(xdr, res);
6827 out:
6828         return status;
6829 }
6830
6831 /*
6832  * Decode RENEW response
6833  */
6834 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6835                               void *__unused)
6836 {
6837         struct compound_hdr hdr;
6838         int status;
6839
6840         status = decode_compound_hdr(xdr, &hdr);
6841         if (!status)
6842                 status = decode_renew(xdr);
6843         return status;
6844 }
6845
6846 /*
6847  * Decode SETCLIENTID response
6848  */
6849 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6850                                     struct xdr_stream *xdr,
6851                                     struct nfs4_setclientid_res *res)
6852 {
6853         struct compound_hdr hdr;
6854         int status;
6855
6856         status = decode_compound_hdr(xdr, &hdr);
6857         if (!status)
6858                 status = decode_setclientid(xdr, res);
6859         return status;
6860 }
6861
6862 /*
6863  * Decode SETCLIENTID_CONFIRM response
6864  */
6865 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6866                                             struct xdr_stream *xdr)
6867 {
6868         struct compound_hdr hdr;
6869         int status;
6870
6871         status = decode_compound_hdr(xdr, &hdr);
6872         if (!status)
6873                 status = decode_setclientid_confirm(xdr);
6874         return status;
6875 }
6876
6877 /*
6878  * Decode DELEGRETURN response
6879  */
6880 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6881                                     struct xdr_stream *xdr,
6882                                     struct nfs4_delegreturnres *res)
6883 {
6884         struct compound_hdr hdr;
6885         int status;
6886
6887         status = decode_compound_hdr(xdr, &hdr);
6888         if (status)
6889                 goto out;
6890         status = decode_sequence(xdr, &res->seq_res, rqstp);
6891         if (status)
6892                 goto out;
6893         status = decode_putfh(xdr);
6894         if (status != 0)
6895                 goto out;
6896         status = decode_getfattr(xdr, res->fattr, res->server);
6897         if (status != 0)
6898                 goto out;
6899         status = decode_delegreturn(xdr);
6900 out:
6901         return status;
6902 }
6903
6904 /*
6905  * Decode FS_LOCATIONS response
6906  */
6907 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6908                                      struct xdr_stream *xdr,
6909                                      struct nfs4_fs_locations_res *res)
6910 {
6911         struct compound_hdr hdr;
6912         int status;
6913
6914         status = decode_compound_hdr(xdr, &hdr);
6915         if (status)
6916                 goto out;
6917         status = decode_sequence(xdr, &res->seq_res, req);
6918         if (status)
6919                 goto out;
6920         status = decode_putfh(xdr);
6921         if (status)
6922                 goto out;
6923         if (res->migration) {
6924                 xdr_enter_page(xdr, PAGE_SIZE);
6925                 status = decode_getfattr_generic(xdr,
6926                                         &res->fs_locations->fattr,
6927                                          NULL, res->fs_locations,
6928                                          NULL, res->fs_locations->server);
6929                 if (status)
6930                         goto out;
6931                 if (res->renew)
6932                         status = decode_renew(xdr);
6933         } else {
6934                 status = decode_lookup(xdr);
6935                 if (status)
6936                         goto out;
6937                 xdr_enter_page(xdr, PAGE_SIZE);
6938                 status = decode_getfattr_generic(xdr,
6939                                         &res->fs_locations->fattr,
6940                                          NULL, res->fs_locations,
6941                                          NULL, res->fs_locations->server);
6942         }
6943 out:
6944         return status;
6945 }
6946
6947 /*
6948  * Decode SECINFO response
6949  */
6950 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6951                                 struct xdr_stream *xdr,
6952                                 struct nfs4_secinfo_res *res)
6953 {
6954         struct compound_hdr hdr;
6955         int status;
6956
6957         status = decode_compound_hdr(xdr, &hdr);
6958         if (status)
6959                 goto out;
6960         status = decode_sequence(xdr, &res->seq_res, rqstp);
6961         if (status)
6962                 goto out;
6963         status = decode_putfh(xdr);
6964         if (status)
6965                 goto out;
6966         status = decode_secinfo(xdr, res);
6967 out:
6968         return status;
6969 }
6970
6971 /*
6972  * Decode FSID_PRESENT response
6973  */
6974 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6975                                      struct xdr_stream *xdr,
6976                                      struct nfs4_fsid_present_res *res)
6977 {
6978         struct compound_hdr hdr;
6979         int status;
6980
6981         status = decode_compound_hdr(xdr, &hdr);
6982         if (status)
6983                 goto out;
6984         status = decode_sequence(xdr, &res->seq_res, rqstp);
6985         if (status)
6986                 goto out;
6987         status = decode_putfh(xdr);
6988         if (status)
6989                 goto out;
6990         status = decode_getfh(xdr, res->fh);
6991         if (status)
6992                 goto out;
6993         if (res->renew)
6994                 status = decode_renew(xdr);
6995 out:
6996         return status;
6997 }
6998
6999 #if defined(CONFIG_NFS_V4_1)
7000 /*
7001  * Decode BIND_CONN_TO_SESSION response
7002  */
7003 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7004                                         struct xdr_stream *xdr,
7005                                         void *res)
7006 {
7007         struct compound_hdr hdr;
7008         int status;
7009
7010         status = decode_compound_hdr(xdr, &hdr);
7011         if (!status)
7012                 status = decode_bind_conn_to_session(xdr, res);
7013         return status;
7014 }
7015
7016 /*
7017  * Decode EXCHANGE_ID response
7018  */
7019 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7020                                     struct xdr_stream *xdr,
7021                                     void *res)
7022 {
7023         struct compound_hdr hdr;
7024         int status;
7025
7026         status = decode_compound_hdr(xdr, &hdr);
7027         if (!status)
7028                 status = decode_exchange_id(xdr, res);
7029         return status;
7030 }
7031
7032 /*
7033  * Decode CREATE_SESSION response
7034  */
7035 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7036                                        struct xdr_stream *xdr,
7037                                        struct nfs41_create_session_res *res)
7038 {
7039         struct compound_hdr hdr;
7040         int status;
7041
7042         status = decode_compound_hdr(xdr, &hdr);
7043         if (!status)
7044                 status = decode_create_session(xdr, res);
7045         return status;
7046 }
7047
7048 /*
7049  * Decode DESTROY_SESSION response
7050  */
7051 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7052                                         struct xdr_stream *xdr,
7053                                         void *res)
7054 {
7055         struct compound_hdr hdr;
7056         int status;
7057
7058         status = decode_compound_hdr(xdr, &hdr);
7059         if (!status)
7060                 status = decode_destroy_session(xdr, res);
7061         return status;
7062 }
7063
7064 /*
7065  * Decode DESTROY_CLIENTID response
7066  */
7067 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7068                                         struct xdr_stream *xdr,
7069                                         void *res)
7070 {
7071         struct compound_hdr hdr;
7072         int status;
7073
7074         status = decode_compound_hdr(xdr, &hdr);
7075         if (!status)
7076                 status = decode_destroy_clientid(xdr, res);
7077         return status;
7078 }
7079
7080 /*
7081  * Decode SEQUENCE response
7082  */
7083 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7084                                  struct xdr_stream *xdr,
7085                                  struct nfs4_sequence_res *res)
7086 {
7087         struct compound_hdr hdr;
7088         int status;
7089
7090         status = decode_compound_hdr(xdr, &hdr);
7091         if (!status)
7092                 status = decode_sequence(xdr, res, rqstp);
7093         return status;
7094 }
7095
7096 /*
7097  * Decode GET_LEASE_TIME response
7098  */
7099 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7100                                        struct xdr_stream *xdr,
7101                                        struct nfs4_get_lease_time_res *res)
7102 {
7103         struct compound_hdr hdr;
7104         int status;
7105
7106         status = decode_compound_hdr(xdr, &hdr);
7107         if (!status)
7108                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7109         if (!status)
7110                 status = decode_putrootfh(xdr);
7111         if (!status)
7112                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7113         return status;
7114 }
7115
7116 /*
7117  * Decode RECLAIM_COMPLETE response
7118  */
7119 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7120                                          struct xdr_stream *xdr,
7121                                          struct nfs41_reclaim_complete_res *res)
7122 {
7123         struct compound_hdr hdr;
7124         int status;
7125
7126         status = decode_compound_hdr(xdr, &hdr);
7127         if (!status)
7128                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7129         if (!status)
7130                 status = decode_reclaim_complete(xdr, NULL);
7131         return status;
7132 }
7133
7134 /*
7135  * Decode GETDEVINFO response
7136  */
7137 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7138                                       struct xdr_stream *xdr,
7139                                       struct nfs4_getdeviceinfo_res *res)
7140 {
7141         struct compound_hdr hdr;
7142         int status;
7143
7144         status = decode_compound_hdr(xdr, &hdr);
7145         if (status != 0)
7146                 goto out;
7147         status = decode_sequence(xdr, &res->seq_res, rqstp);
7148         if (status != 0)
7149                 goto out;
7150         status = decode_getdeviceinfo(xdr, res);
7151 out:
7152         return status;
7153 }
7154
7155 /*
7156  * Decode LAYOUTGET response
7157  */
7158 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7159                                   struct xdr_stream *xdr,
7160                                   struct nfs4_layoutget_res *res)
7161 {
7162         struct compound_hdr hdr;
7163         int status;
7164
7165         status = decode_compound_hdr(xdr, &hdr);
7166         if (status)
7167                 goto out;
7168         status = decode_sequence(xdr, &res->seq_res, rqstp);
7169         if (status)
7170                 goto out;
7171         status = decode_putfh(xdr);
7172         if (status)
7173                 goto out;
7174         status = decode_layoutget(xdr, rqstp, res);
7175 out:
7176         return status;
7177 }
7178
7179 /*
7180  * Decode LAYOUTRETURN response
7181  */
7182 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7183                                      struct xdr_stream *xdr,
7184                                      struct nfs4_layoutreturn_res *res)
7185 {
7186         struct compound_hdr hdr;
7187         int status;
7188
7189         status = decode_compound_hdr(xdr, &hdr);
7190         if (status)
7191                 goto out;
7192         status = decode_sequence(xdr, &res->seq_res, rqstp);
7193         if (status)
7194                 goto out;
7195         status = decode_putfh(xdr);
7196         if (status)
7197                 goto out;
7198         status = decode_layoutreturn(xdr, res);
7199 out:
7200         return status;
7201 }
7202
7203 /*
7204  * Decode LAYOUTCOMMIT response
7205  */
7206 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7207                                      struct xdr_stream *xdr,
7208                                      struct nfs4_layoutcommit_res *res)
7209 {
7210         struct compound_hdr hdr;
7211         int status;
7212
7213         status = decode_compound_hdr(xdr, &hdr);
7214         if (status)
7215                 goto out;
7216         status = decode_sequence(xdr, &res->seq_res, rqstp);
7217         if (status)
7218                 goto out;
7219         status = decode_putfh(xdr);
7220         if (status)
7221                 goto out;
7222         status = decode_layoutcommit(xdr, rqstp, res);
7223         if (status)
7224                 goto out;
7225         decode_getfattr(xdr, res->fattr, res->server);
7226 out:
7227         return status;
7228 }
7229
7230 /*
7231  * Decode SECINFO_NO_NAME response
7232  */
7233 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7234                                         struct xdr_stream *xdr,
7235                                         struct nfs4_secinfo_res *res)
7236 {
7237         struct compound_hdr hdr;
7238         int status;
7239
7240         status = decode_compound_hdr(xdr, &hdr);
7241         if (status)
7242                 goto out;
7243         status = decode_sequence(xdr, &res->seq_res, rqstp);
7244         if (status)
7245                 goto out;
7246         status = decode_putrootfh(xdr);
7247         if (status)
7248                 goto out;
7249         status = decode_secinfo_no_name(xdr, res);
7250 out:
7251         return status;
7252 }
7253
7254 /*
7255  * Decode TEST_STATEID response
7256  */
7257 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7258                                      struct xdr_stream *xdr,
7259                                      struct nfs41_test_stateid_res *res)
7260 {
7261         struct compound_hdr hdr;
7262         int status;
7263
7264         status = decode_compound_hdr(xdr, &hdr);
7265         if (status)
7266                 goto out;
7267         status = decode_sequence(xdr, &res->seq_res, rqstp);
7268         if (status)
7269                 goto out;
7270         status = decode_test_stateid(xdr, res);
7271 out:
7272         return status;
7273 }
7274
7275 /*
7276  * Decode FREE_STATEID response
7277  */
7278 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7279                                      struct xdr_stream *xdr,
7280                                      struct nfs41_free_stateid_res *res)
7281 {
7282         struct compound_hdr hdr;
7283         int status;
7284
7285         status = decode_compound_hdr(xdr, &hdr);
7286         if (status)
7287                 goto out;
7288         status = decode_sequence(xdr, &res->seq_res, rqstp);
7289         if (status)
7290                 goto out;
7291         status = decode_free_stateid(xdr, res);
7292 out:
7293         return status;
7294 }
7295 #endif /* CONFIG_NFS_V4_1 */
7296
7297 /**
7298  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7299  *                      the local page cache.
7300  * @xdr: XDR stream where entry resides
7301  * @entry: buffer to fill in with entry data
7302  * @plus: boolean indicating whether this should be a readdirplus entry
7303  *
7304  * Returns zero if successful, otherwise a negative errno value is
7305  * returned.
7306  *
7307  * This function is not invoked during READDIR reply decoding, but
7308  * rather whenever an application invokes the getdents(2) system call
7309  * on a directory already in our cache.
7310  */
7311 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7312                        int plus)
7313 {
7314         unsigned int savep;
7315         uint32_t bitmap[3] = {0};
7316         uint32_t len;
7317         __be32 *p = xdr_inline_decode(xdr, 4);
7318         if (unlikely(!p))
7319                 goto out_overflow;
7320         if (*p == xdr_zero) {
7321                 p = xdr_inline_decode(xdr, 4);
7322                 if (unlikely(!p))
7323                         goto out_overflow;
7324                 if (*p == xdr_zero)
7325                         return -EAGAIN;
7326                 entry->eof = 1;
7327                 return -EBADCOOKIE;
7328         }
7329
7330         p = xdr_inline_decode(xdr, 12);
7331         if (unlikely(!p))
7332                 goto out_overflow;
7333         entry->prev_cookie = entry->cookie;
7334         p = xdr_decode_hyper(p, &entry->cookie);
7335         entry->len = be32_to_cpup(p);
7336
7337         p = xdr_inline_decode(xdr, entry->len);
7338         if (unlikely(!p))
7339                 goto out_overflow;
7340         entry->name = (const char *) p;
7341
7342         /*
7343          * In case the server doesn't return an inode number,
7344          * we fake one here.  (We don't use inode number 0,
7345          * since glibc seems to choke on it...)
7346          */
7347         entry->ino = 1;
7348         entry->fattr->valid = 0;
7349
7350         if (decode_attr_bitmap(xdr, bitmap) < 0)
7351                 goto out_overflow;
7352
7353         if (decode_attr_length(xdr, &len, &savep) < 0)
7354                 goto out_overflow;
7355
7356         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7357                         NULL, entry->label, entry->server) < 0)
7358                 goto out_overflow;
7359         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7360                 entry->ino = entry->fattr->mounted_on_fileid;
7361         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7362                 entry->ino = entry->fattr->fileid;
7363
7364         entry->d_type = DT_UNKNOWN;
7365         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7366                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7367
7368         return 0;
7369
7370 out_overflow:
7371         print_overflow_msg(__func__, xdr);
7372         return -EAGAIN;
7373 }
7374
7375 /*
7376  * We need to translate between nfs status return values and
7377  * the local errno values which may not be the same.
7378  */
7379 static struct {
7380         int stat;
7381         int errno;
7382 } nfs_errtbl[] = {
7383         { NFS4_OK,              0               },
7384         { NFS4ERR_PERM,         -EPERM          },
7385         { NFS4ERR_NOENT,        -ENOENT         },
7386         { NFS4ERR_IO,           -errno_NFSERR_IO},
7387         { NFS4ERR_NXIO,         -ENXIO          },
7388         { NFS4ERR_ACCESS,       -EACCES         },
7389         { NFS4ERR_EXIST,        -EEXIST         },
7390         { NFS4ERR_XDEV,         -EXDEV          },
7391         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7392         { NFS4ERR_ISDIR,        -EISDIR         },
7393         { NFS4ERR_INVAL,        -EINVAL         },
7394         { NFS4ERR_FBIG,         -EFBIG          },
7395         { NFS4ERR_NOSPC,        -ENOSPC         },
7396         { NFS4ERR_ROFS,         -EROFS          },
7397         { NFS4ERR_MLINK,        -EMLINK         },
7398         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7399         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7400         { NFS4ERR_DQUOT,        -EDQUOT         },
7401         { NFS4ERR_STALE,        -ESTALE         },
7402         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7403         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7404         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7405         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7406         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7407         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7408         { NFS4ERR_LOCKED,       -EAGAIN         },
7409         { NFS4ERR_SYMLINK,      -ELOOP          },
7410         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7411         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7412         { -1,                   -EIO            }
7413 };
7414
7415 /*
7416  * Convert an NFS error code to a local one.
7417  * This one is used jointly by NFSv2 and NFSv3.
7418  */
7419 static int
7420 nfs4_stat_to_errno(int stat)
7421 {
7422         int i;
7423         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7424                 if (nfs_errtbl[i].stat == stat)
7425                         return nfs_errtbl[i].errno;
7426         }
7427         if (stat <= 10000 || stat > 10100) {
7428                 /* The server is looney tunes. */
7429                 return -EREMOTEIO;
7430         }
7431         /* If we cannot translate the error, the recovery routines should
7432          * handle it.
7433          * Note: remaining NFSv4 error codes have values > 10000, so should
7434          * not conflict with native Linux error codes.
7435          */
7436         return -stat;
7437 }
7438
7439 #ifdef CONFIG_NFS_V4_2
7440 #include "nfs42xdr.c"
7441 #endif /* CONFIG_NFS_V4_2 */
7442
7443 #define PROC(proc, argtype, restype)                            \
7444 [NFSPROC4_CLNT_##proc] = {                                      \
7445         .p_proc   = NFSPROC4_COMPOUND,                          \
7446         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7447         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7448         .p_arglen = NFS4_##argtype##_sz,                        \
7449         .p_replen = NFS4_##restype##_sz,                        \
7450         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7451         .p_name   = #proc,                                      \
7452 }
7453
7454 #define STUB(proc)              \
7455 [NFSPROC4_CLNT_##proc] = {      \
7456         .p_name = #proc,        \
7457 }
7458
7459 struct rpc_procinfo     nfs4_procedures[] = {
7460         PROC(READ,              enc_read,               dec_read),
7461         PROC(WRITE,             enc_write,              dec_write),
7462         PROC(COMMIT,            enc_commit,             dec_commit),
7463         PROC(OPEN,              enc_open,               dec_open),
7464         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7465         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7466         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7467         PROC(CLOSE,             enc_close,              dec_close),
7468         PROC(SETATTR,           enc_setattr,            dec_setattr),
7469         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7470         PROC(RENEW,             enc_renew,              dec_renew),
7471         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7472         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7473         PROC(LOCK,              enc_lock,               dec_lock),
7474         PROC(LOCKT,             enc_lockt,              dec_lockt),
7475         PROC(LOCKU,             enc_locku,              dec_locku),
7476         PROC(ACCESS,            enc_access,             dec_access),
7477         PROC(GETATTR,           enc_getattr,            dec_getattr),
7478         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7479         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7480         PROC(REMOVE,            enc_remove,             dec_remove),
7481         PROC(RENAME,            enc_rename,             dec_rename),
7482         PROC(LINK,              enc_link,               dec_link),
7483         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7484         PROC(CREATE,            enc_create,             dec_create),
7485         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7486         PROC(STATFS,            enc_statfs,             dec_statfs),
7487         PROC(READLINK,          enc_readlink,           dec_readlink),
7488         PROC(READDIR,           enc_readdir,            dec_readdir),
7489         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7490         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7491         PROC(GETACL,            enc_getacl,             dec_getacl),
7492         PROC(SETACL,            enc_setacl,             dec_setacl),
7493         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7494         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7495         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7496         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7497 #if defined(CONFIG_NFS_V4_1)
7498         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7499         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7500         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7501         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7502         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7503         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7504         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7505         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7506         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7507         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7508         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7509         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7510         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7511         STUB(GETDEVICELIST),
7512         PROC(BIND_CONN_TO_SESSION,
7513                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7514         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7515 #endif /* CONFIG_NFS_V4_1 */
7516 #ifdef CONFIG_NFS_V4_2
7517         PROC(SEEK,              enc_seek,               dec_seek),
7518         PROC(ALLOCATE,          enc_allocate,           dec_allocate),
7519         PROC(DEALLOCATE,        enc_deallocate,         dec_deallocate),
7520         PROC(LAYOUTSTATS,       enc_layoutstats,        dec_layoutstats),
7521         PROC(CLONE,             enc_clone,              dec_clone),
7522 #endif /* CONFIG_NFS_V4_2 */
7523 };
7524
7525 const struct rpc_version nfs_version4 = {
7526         .number                 = 4,
7527         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7528         .procs                  = nfs4_procedures
7529 };
7530
7531 /*
7532  * Local variables:
7533  *  c-basic-offset: 8
7534  * End:
7535  */