fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/module.h>
  48 #include <linux/utsname.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/sunrpc/msg_prot.h>
  51 #include <linux/sunrpc/gss_api.h>
  52 #include <linux/nfs.h>
  53 #include <linux/nfs4.h>
  54 #include <linux/nfs_fs.h>
  55 #include <linux/nfs_idmap.h>
  56
  57 #include "nfs4_fs.h"
  58 #include "internal.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                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 143                                 1 /* sc_prog */ + \
 144                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 145                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 146                                 1) /* sc_cb_ident */
 147 #define decode_setclientid_maxsz \
 148                                 (op_decode_hdr_maxsz + \
 149                                 2 + \
 150                                 1024) /* large value for CLID_INUSE */
 151 #define encode_setclientid_confirm_maxsz \
 152                                 (op_encode_hdr_maxsz + \
 153                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 154 #define decode_setclientid_confirm_maxsz \
 155                                 (op_decode_hdr_maxsz)
 156 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 157 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 158 #define encode_share_access_maxsz \
 159                                 (2)
 160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 161 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 163 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 164                                 2 + encode_share_access_maxsz + 2 + \
 165                                 open_owner_id_maxsz + \
 166                                 encode_opentype_maxsz + \
 167                                 encode_claim_null_maxsz)
 168 #define decode_space_limit_maxsz        (3)
 169 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 170 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 171                                 decode_space_limit_maxsz + \
 172                                 decode_ace_maxsz)
 173 #define decode_change_info_maxsz        (5)
 174 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 175                                 decode_stateid_maxsz + \
 176                                 decode_change_info_maxsz + 1 + \
 177                                 nfs4_fattr_bitmap_maxsz + \
 178                                 decode_delegation_maxsz)
 179 #define encode_open_confirm_maxsz \
 180                                 (op_encode_hdr_maxsz + \
 181                                  encode_stateid_maxsz + 1)
 182 #define decode_open_confirm_maxsz \
 183                                 (op_decode_hdr_maxsz + \
 184                                  decode_stateid_maxsz)
 185 #define encode_open_downgrade_maxsz \
 186                                 (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 1 + \
 188                                  encode_share_access_maxsz)
 189 #define decode_open_downgrade_maxsz \
 190                                 (op_decode_hdr_maxsz + \
 191                                  decode_stateid_maxsz)
 192 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 193                                  1 + encode_stateid_maxsz)
 194 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 195                                  decode_stateid_maxsz)
 196 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 197                                  encode_stateid_maxsz + \
 198                                  encode_attrs_maxsz)
 199 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 200                                  nfs4_fattr_bitmap_maxsz)
 201 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 202                                  encode_stateid_maxsz + 3)
 203 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 204 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 205                                  2 + encode_verifier_maxsz + 5 + \
 206                                 nfs4_label_maxsz)
 207 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 208                                  decode_verifier_maxsz)
 209 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 210 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 211 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 212                                  encode_stateid_maxsz + 4)
 213 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 214                                  2 + decode_verifier_maxsz)
 215 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 216 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 217                                  decode_verifier_maxsz)
 218 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 219                                 nfs4_name_maxsz)
 220 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 221                                  decode_change_info_maxsz)
 222 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 223                                 2 * nfs4_name_maxsz)
 224 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 225                                  decode_change_info_maxsz + \
 226                                  decode_change_info_maxsz)
 227 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 228                                 nfs4_name_maxsz)
 229 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 230 #define encode_lockowner_maxsz  (7)
 231 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 232                                  7 + \
 233                                  1 + encode_stateid_maxsz + 1 + \
 234                                  encode_lockowner_maxsz)
 235 #define decode_lock_denied_maxsz \
 236                                 (8 + decode_lockowner_maxsz)
 237 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 238                                  decode_lock_denied_maxsz)
 239 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 240                                 encode_lockowner_maxsz)
 241 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 242                                  decode_lock_denied_maxsz)
 243 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 244                                  encode_stateid_maxsz + \
 245                                  4)
 246 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 247                                  decode_stateid_maxsz)
 248 #define encode_release_lockowner_maxsz \
 249                                 (op_encode_hdr_maxsz + \
 250                                  encode_lockowner_maxsz)
 251 #define decode_release_lockowner_maxsz \
 252                                 (op_decode_hdr_maxsz)
 253 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 254 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 255 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 256                                 1 + nfs4_name_maxsz + \
 257                                 1 + \
 258                                 nfs4_fattr_maxsz)
 259 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 260 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 261                                 1 + 2 + nfs4_name_maxsz + \
 262                                 encode_attrs_maxsz)
 263 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 264                                 decode_change_info_maxsz + \
 265                                 nfs4_fattr_bitmap_maxsz)
 266 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 267 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 268 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 269 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 270 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 271 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 272                                  nfs4_fattr_bitmap_maxsz + 1)
 273 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 274                                  encode_stateid_maxsz + 3)
 275 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 276 #define encode_fs_locations_maxsz \
 277                                 (encode_getattr_maxsz)
 278 #define decode_fs_locations_maxsz \
 279                                 (0)
 280 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 281 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 282
 283 #if defined(CONFIG_NFS_V4_1)
 284 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 285 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
 286                          sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
 287
 288 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 289                                 encode_verifier_maxsz + \
 290                                 1 /* co_ownerid.len */ + \
 291                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 292                                 1 /* flags */ + \
 293                                 1 /* spa_how */ + \
 294                                 /* max is SP4_MACH_CRED (for now) */ + \
 295                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 296                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 297                                 1 /* implementation id array of size 1 */ + \
 298                                 1 /* nii_domain */ + \
 299                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 300                                 1 /* nii_name */ + \
 301                                 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
 302                                 3 /* nii_date */)
 303 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 304                                 2 /* eir_clientid */ + \
 305                                 1 /* eir_sequenceid */ + \
 306                                 1 /* eir_flags */ + \
 307                                 1 /* spr_how */ + \
 308                                   /* max is SP4_MACH_CRED (for now) */ + \
 309                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 310                                 1 + NFS4_OP_MAP_NUM_WORDS + \
 311                                 2 /* eir_server_owner.so_minor_id */ + \
 312                                 /* eir_server_owner.so_major_id<> */ \
 313                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 314                                 /* eir_server_scope<> */ \
 315                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 316                                 1 /* eir_server_impl_id array length */ + \
 317                                 1 /* nii_domain */ + \
 318                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 319                                 1 /* nii_name */ + \
 320                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
 321                                 3 /* nii_date */)
 322 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 323 #define decode_channel_attrs_maxsz  (6 + \
 324                                      1 /* ca_rdma_ird.len */ + \
 325                                      1 /* ca_rdma_ird */)
 326 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 327                                      2 /* csa_clientid */ + \
 328                                      1 /* csa_sequence */ + \
 329                                      1 /* csa_flags */ + \
 330                                      encode_channel_attrs_maxsz + \
 331                                      encode_channel_attrs_maxsz + \
 332                                      1 /* csa_cb_program */ + \
 333                                      1 /* csa_sec_parms.len (1) */ + \
 334                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 335                                      1 /* stamp */ + \
 336                                      1 /* machinename.len */ + \
 337                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 338                                      1 /* uid */ + \
 339                                      1 /* gid */ + \
 340                                      1 /* gids.len (0) */)
 341 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 342                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 343                                      1 /* csr_sequence */ + \
 344                                      1 /* csr_flags */ + \
 345                                      decode_channel_attrs_maxsz + \
 346                                      decode_channel_attrs_maxsz)
 347 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
 348                                      /* bctsa_sessid */ \
 349                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 350                                      1 /* bctsa_dir */ + \
 351                                      1 /* bctsa_use_conn_in_rdma_mode */)
 352 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +       \
 353                                      /* bctsr_sessid */ \
 354                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 355                                      1 /* bctsr_dir */ + \
 356                                      1 /* bctsr_use_conn_in_rdma_mode */)
 357 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 358 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 359 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
 360 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
 361 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 362                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 363 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 364                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 365 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 366 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 367 #define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
 368                                 encode_verifier_maxsz)
 369 #define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
 370                                 2 /* nfs_cookie4 gdlr_cookie */ + \
 371                                 decode_verifier_maxsz \
 372                                   /* verifier4 gdlr_verifier */ + \
 373                                 1 /* gdlr_deviceid_list count */ + \
 374                                 XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
 375                                             NFS4_DEVICEID4_SIZE) \
 376                                   /* gdlr_deviceid_list */ + \
 377                                 1 /* bool gdlr_eof */)
 378 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 379                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 380 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 381                                 1 /* layout type */ + \
 382                                 1 /* opaque devaddr4 length */ + \
 383                                   /* devaddr4 payload is read into page */ \
 384                                 1 /* notification bitmap length */ + \
 385                                 1 /* notification bitmap */)
 386 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 387                                 encode_stateid_maxsz)
 388 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 389                                 decode_stateid_maxsz + \
 390                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 391 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 392                                 2 /* offset */ + \
 393                                 2 /* length */ + \
 394                                 1 /* reclaim */ + \
 395                                 encode_stateid_maxsz + \
 396                                 1 /* new offset (true) */ + \
 397                                 2 /* last byte written */ + \
 398                                 1 /* nt_timechanged (false) */ + \
 399                                 1 /* layoutupdate4 layout type */ + \
 400                                 1 /* NULL filelayout layoutupdate4 payload */)
 401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
 403                                 encode_stateid_maxsz + \
 404                                 1 /* FIXME: opaque lrf_body always empty at the moment */)
 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_getdevicelist_sz (compound_encode_hdr_maxsz + \
 815                                 encode_sequence_maxsz + \
 816                                 encode_putfh_maxsz + \
 817                                 encode_getdevicelist_maxsz)
 818 #define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
 819                                 decode_sequence_maxsz + \
 820                                 decode_putfh_maxsz + \
 821                                 decode_getdevicelist_maxsz)
 822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 823                                 encode_sequence_maxsz +\
 824                                 encode_getdeviceinfo_maxsz)
 825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 826                                 decode_sequence_maxsz + \
 827                                 decode_getdeviceinfo_maxsz)
 828 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 829                                 encode_sequence_maxsz + \
 830                                 encode_putfh_maxsz +        \
 831                                 encode_layoutget_maxsz)
 832 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 833                                 decode_sequence_maxsz + \
 834                                 decode_putfh_maxsz +        \
 835                                 decode_layoutget_maxsz)
 836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 837                                 encode_sequence_maxsz +\
 838                                 encode_putfh_maxsz + \
 839                                 encode_layoutcommit_maxsz + \
 840                                 encode_getattr_maxsz)
 841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 842                                 decode_sequence_maxsz + \
 843                                 decode_putfh_maxsz + \
 844                                 decode_layoutcommit_maxsz + \
 845                                 decode_getattr_maxsz)
 846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
 847                                 encode_sequence_maxsz + \
 848                                 encode_putfh_maxsz + \
 849                                 encode_layoutreturn_maxsz)
 850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
 851                                 decode_sequence_maxsz + \
 852                                 decode_putfh_maxsz + \
 853                                 decode_layoutreturn_maxsz)
 854 #define NFS4_enc_secinfo_no_name_sz     (compound_encode_hdr_maxsz + \
 855                                         encode_sequence_maxsz + \
 856                                         encode_putrootfh_maxsz +\
 857                                         encode_secinfo_no_name_maxsz)
 858 #define NFS4_dec_secinfo_no_name_sz     (compound_decode_hdr_maxsz + \
 859                                         decode_sequence_maxsz + \
 860                                         decode_putrootfh_maxsz + \
 861                                         decode_secinfo_no_name_maxsz)
 862 #define NFS4_enc_test_stateid_sz        (compound_encode_hdr_maxsz + \
 863                                          encode_sequence_maxsz + \
 864                                          encode_test_stateid_maxsz)
 865 #define NFS4_dec_test_stateid_sz        (compound_decode_hdr_maxsz + \
 866                                          decode_sequence_maxsz + \
 867                                          decode_test_stateid_maxsz)
 868 #define NFS4_enc_free_stateid_sz        (compound_encode_hdr_maxsz + \
 869                                          encode_sequence_maxsz + \
 870                                          encode_free_stateid_maxsz)
 871 #define NFS4_dec_free_stateid_sz        (compound_decode_hdr_maxsz + \
 872                                          decode_sequence_maxsz + \
 873                                          decode_free_stateid_maxsz)
 874
 875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 876                                       compound_encode_hdr_maxsz +
 877                                       encode_sequence_maxsz +
 878                                       encode_putfh_maxsz +
 879                                       encode_getattr_maxsz) *
 880                                      XDR_UNIT);
 881
 882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 883                                      compound_decode_hdr_maxsz +
 884                                      decode_sequence_maxsz +
 885                                      decode_putfh_maxsz) *
 886                                     XDR_UNIT);
 887
 888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
 889                                            compound_decode_hdr_maxsz +
 890                                            decode_sequence_maxsz) *
 891                                           XDR_UNIT);
 892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
 893 #endif /* CONFIG_NFS_V4_1 */
 894
 895 static const umode_t nfs_type2fmt[] = {
 896         [NF4BAD] = 0,
 897         [NF4REG] = S_IFREG,
 898         [NF4DIR] = S_IFDIR,
 899         [NF4BLK] = S_IFBLK,
 900         [NF4CHR] = S_IFCHR,
 901         [NF4LNK] = S_IFLNK,
 902         [NF4SOCK] = S_IFSOCK,
 903         [NF4FIFO] = S_IFIFO,
 904         [NF4ATTRDIR] = 0,
 905         [NF4NAMEDATTR] = 0,
 906 };
 907
 908 struct compound_hdr {
 909         int32_t         status;
 910         uint32_t        nops;
 911         __be32 *        nops_p;
 912         uint32_t        taglen;
 913         char *          tag;
 914         uint32_t        replen;         /* expected reply words */
 915         u32             minorversion;
 916 };
 917
 918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 919 {
 920         __be32 *p = xdr_reserve_space(xdr, nbytes);
 921         BUG_ON(!p);
 922         return p;
 923 }
 924
 925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
 926 {
 927         __be32 *p;
 928
 929         p = xdr_reserve_space(xdr, len);
 930         xdr_encode_opaque_fixed(p, buf, len);
 931 }
 932
 933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 934 {
 935         __be32 *p;
 936
 937         p = reserve_space(xdr, 4 + len);
 938         xdr_encode_opaque(p, str, len);
 939 }
 940
 941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
 942 {
 943         __be32 *p;
 944
 945         p = reserve_space(xdr, 4);
 946         *p = cpu_to_be32(n);
 947 }
 948
 949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         xdr_encode_hyper(p, n);
 955 }
 956
 957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
 958                 const struct nfs_seqid *seqid)
 959 {
 960         encode_uint32(xdr, seqid->sequence->counter);
 961 }
 962
 963 static void encode_compound_hdr(struct xdr_stream *xdr,
 964                                 struct rpc_rqst *req,
 965                                 struct compound_hdr *hdr)
 966 {
 967         __be32 *p;
 968         struct rpc_auth *auth = req->rq_cred->cr_auth;
 969
 970         /* initialize running count of expected bytes in reply.
 971          * NOTE: the replied tag SHOULD be the same is the one sent,
 972          * but this is not required as a MUST for the server to do so. */
 973         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 974
 975         WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 976         encode_string(xdr, hdr->taglen, hdr->tag);
 977         p = reserve_space(xdr, 8);
 978         *p++ = cpu_to_be32(hdr->minorversion);
 979         hdr->nops_p = p;
 980         *p = cpu_to_be32(hdr->nops);
 981 }
 982
 983 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
 984                 uint32_t replen,
 985                 struct compound_hdr *hdr)
 986 {
 987         encode_uint32(xdr, op);
 988         hdr->nops++;
 989         hdr->replen += replen;
 990 }
 991
 992 static void encode_nops(struct compound_hdr *hdr)
 993 {
 994         WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
 995         *hdr->nops_p = htonl(hdr->nops);
 996 }
 997
 998 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
 999 {
1000         encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1001 }
1002
1003 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1004 {
1005         encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1006 }
1007
1008 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1009                                 const struct nfs4_label *label,
1010                                 const struct nfs_server *server)
1011 {
1012         char owner_name[IDMAP_NAMESZ];
1013         char owner_group[IDMAP_NAMESZ];
1014         int owner_namelen = 0;
1015         int owner_grouplen = 0;
1016         __be32 *p;
1017         unsigned i;
1018         uint32_t len = 0;
1019         uint32_t bmval_len;
1020         uint32_t bmval[3] = { 0 };
1021
1022         /*
1023          * We reserve enough space to write the entire attribute buffer at once.
1024          * In the worst-case, this would be
1025          * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1026          * = 40 bytes, plus any contribution from variable-length fields
1027          *            such as owner/group.
1028          */
1029         if (iap->ia_valid & ATTR_SIZE) {
1030                 bmval[0] |= FATTR4_WORD0_SIZE;
1031                 len += 8;
1032         }
1033         if (iap->ia_valid & ATTR_MODE) {
1034                 bmval[1] |= FATTR4_WORD1_MODE;
1035                 len += 4;
1036         }
1037         if (iap->ia_valid & ATTR_UID) {
1038                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1039                 if (owner_namelen < 0) {
1040                         dprintk("nfs: couldn't resolve uid %d to string\n",
1041                                         from_kuid(&init_user_ns, iap->ia_uid));
1042                         /* XXX */
1043                         strcpy(owner_name, "nobody");
1044                         owner_namelen = sizeof("nobody") - 1;
1045                         /* goto out; */
1046                 }
1047                 bmval[1] |= FATTR4_WORD1_OWNER;
1048                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1049         }
1050         if (iap->ia_valid & ATTR_GID) {
1051                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1052                 if (owner_grouplen < 0) {
1053                         dprintk("nfs: couldn't resolve gid %d to string\n",
1054                                         from_kgid(&init_user_ns, iap->ia_gid));
1055                         strcpy(owner_group, "nobody");
1056                         owner_grouplen = sizeof("nobody") - 1;
1057                         /* goto out; */
1058                 }
1059                 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1060                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1061         }
1062         if (iap->ia_valid & ATTR_ATIME_SET) {
1063                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1064                 len += 16;
1065         } else if (iap->ia_valid & ATTR_ATIME) {
1066                 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1067                 len += 4;
1068         }
1069         if (iap->ia_valid & ATTR_MTIME_SET) {
1070                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1071                 len += 16;
1072         } else if (iap->ia_valid & ATTR_MTIME) {
1073                 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1074                 len += 4;
1075         }
1076         if (label) {
1077                 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1078                 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1079         }
1080
1081         if (bmval[2] != 0)
1082                 bmval_len = 3;
1083         else if (bmval[1] != 0)
1084                 bmval_len = 2;
1085         else
1086                 bmval_len = 1;
1087
1088         p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1089
1090         *p++ = cpu_to_be32(bmval_len);
1091         for (i = 0; i < bmval_len; i++)
1092                 *p++ = cpu_to_be32(bmval[i]);
1093         *p++ = cpu_to_be32(len);
1094
1095         if (bmval[0] & FATTR4_WORD0_SIZE)
1096                 p = xdr_encode_hyper(p, iap->ia_size);
1097         if (bmval[1] & FATTR4_WORD1_MODE)
1098                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1099         if (bmval[1] & FATTR4_WORD1_OWNER)
1100                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1101         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1102                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1103         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1104                 if (iap->ia_valid & ATTR_ATIME_SET) {
1105                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1106                         p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1107                         *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1108                 } else
1109                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1110         }
1111         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1112                 if (iap->ia_valid & ATTR_MTIME_SET) {
1113                         *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1114                         p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1115                         *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1116                 } else
1117                         *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1118         }
1119         if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1120                 *p++ = cpu_to_be32(label->lfs);
1121                 *p++ = cpu_to_be32(label->pi);
1122                 *p++ = cpu_to_be32(label->len);
1123                 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1124         }
1125
1126 /* out: */
1127 }
1128
1129 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1130 {
1131         encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1132         encode_uint32(xdr, access);
1133 }
1134
1135 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1136 {
1137         encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1138         encode_nfs4_seqid(xdr, arg->seqid);
1139         encode_nfs4_stateid(xdr, arg->stateid);
1140 }
1141
1142 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1143 {
1144         __be32 *p;
1145
1146         encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1147         p = reserve_space(xdr, 12);
1148         p = xdr_encode_hyper(p, args->offset);
1149         *p = cpu_to_be32(args->count);
1150 }
1151
1152 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1153 {
1154         __be32 *p;
1155
1156         encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1157         encode_uint32(xdr, create->ftype);
1158
1159         switch (create->ftype) {
1160         case NF4LNK:
1161                 p = reserve_space(xdr, 4);
1162                 *p = cpu_to_be32(create->u.symlink.len);
1163                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1164                 break;
1165
1166         case NF4BLK: case NF4CHR:
1167                 p = reserve_space(xdr, 8);
1168                 *p++ = cpu_to_be32(create->u.device.specdata1);
1169                 *p = cpu_to_be32(create->u.device.specdata2);
1170                 break;
1171
1172         default:
1173                 break;
1174         }
1175
1176         encode_string(xdr, create->name->len, create->name->name);
1177         encode_attrs(xdr, create->attrs, create->label, create->server);
1178 }
1179
1180 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1185         p = reserve_space(xdr, 8);
1186         *p++ = cpu_to_be32(1);
1187         *p = cpu_to_be32(bitmap);
1188 }
1189
1190 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1195         p = reserve_space(xdr, 12);
1196         *p++ = cpu_to_be32(2);
1197         *p++ = cpu_to_be32(bm0);
1198         *p = cpu_to_be32(bm1);
1199 }
1200
1201 static void
1202 encode_getattr_three(struct xdr_stream *xdr,
1203                      uint32_t bm0, uint32_t bm1, uint32_t bm2,
1204                      struct compound_hdr *hdr)
1205 {
1206         __be32 *p;
1207
1208         encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1209         if (bm2) {
1210                 p = reserve_space(xdr, 16);
1211                 *p++ = cpu_to_be32(3);
1212                 *p++ = cpu_to_be32(bm0);
1213                 *p++ = cpu_to_be32(bm1);
1214                 *p = cpu_to_be32(bm2);
1215         } else if (bm1) {
1216                 p = reserve_space(xdr, 12);
1217                 *p++ = cpu_to_be32(2);
1218                 *p++ = cpu_to_be32(bm0);
1219                 *p = cpu_to_be32(bm1);
1220         } else {
1221                 p = reserve_space(xdr, 8);
1222                 *p++ = cpu_to_be32(1);
1223                 *p = cpu_to_be32(bm0);
1224         }
1225 }
1226
1227 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1228 {
1229         encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1230                            bitmask[1] & nfs4_fattr_bitmap[1],
1231                            bitmask[2] & nfs4_fattr_bitmap[2],
1232                            hdr);
1233 }
1234
1235 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1236                                  const u32 *open_bitmap,
1237                                  struct compound_hdr *hdr)
1238 {
1239         encode_getattr_three(xdr,
1240                              bitmask[0] & open_bitmap[0],
1241                              bitmask[1] & open_bitmap[1],
1242                              bitmask[2] & open_bitmap[2],
1243                              hdr);
1244 }
1245
1246 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1247 {
1248         encode_getattr_three(xdr,
1249                              bitmask[0] & nfs4_fsinfo_bitmap[0],
1250                              bitmask[1] & nfs4_fsinfo_bitmap[1],
1251                              bitmask[2] & nfs4_fsinfo_bitmap[2],
1252                              hdr);
1253 }
1254
1255 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1258                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1259 }
1260
1261 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1262 {
1263         encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1264 }
1265
1266 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1267 {
1268         encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1269         encode_string(xdr, name->len, name->name);
1270 }
1271
1272 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1273 {
1274         if (fl->fl_type == F_RDLCK)
1275                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1276         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1277 }
1278
1279 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1280 {
1281         if (fl->fl_end == OFFSET_MAX)
1282                 return ~(uint64_t)0;
1283         return fl->fl_end - fl->fl_start + 1;
1284 }
1285
1286 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1287 {
1288         __be32 *p;
1289
1290         p = reserve_space(xdr, 32);
1291         p = xdr_encode_hyper(p, lowner->clientid);
1292         *p++ = cpu_to_be32(20);
1293         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1294         *p++ = cpu_to_be32(lowner->s_dev);
1295         xdr_encode_hyper(p, lowner->id);
1296 }
1297
1298 /*
1299  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1300  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1301  */
1302 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1303 {
1304         __be32 *p;
1305
1306         encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1307         p = reserve_space(xdr, 28);
1308         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1309         *p++ = cpu_to_be32(args->reclaim);
1310         p = xdr_encode_hyper(p, args->fl->fl_start);
1311         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1312         *p = cpu_to_be32(args->new_lock_owner);
1313         if (args->new_lock_owner){
1314                 encode_nfs4_seqid(xdr, args->open_seqid);
1315                 encode_nfs4_stateid(xdr, args->open_stateid);
1316                 encode_nfs4_seqid(xdr, args->lock_seqid);
1317                 encode_lockowner(xdr, &args->lock_owner);
1318         }
1319         else {
1320                 encode_nfs4_stateid(xdr, args->lock_stateid);
1321                 encode_nfs4_seqid(xdr, args->lock_seqid);
1322         }
1323 }
1324
1325 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1326 {
1327         __be32 *p;
1328
1329         encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1330         p = reserve_space(xdr, 20);
1331         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1332         p = xdr_encode_hyper(p, args->fl->fl_start);
1333         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334         encode_lockowner(xdr, &args->lock_owner);
1335 }
1336
1337 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1338 {
1339         __be32 *p;
1340
1341         encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1342         encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1343         encode_nfs4_seqid(xdr, args->seqid);
1344         encode_nfs4_stateid(xdr, args->stateid);
1345         p = reserve_space(xdr, 16);
1346         p = xdr_encode_hyper(p, args->fl->fl_start);
1347         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1348 }
1349
1350 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1351 {
1352         encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1353         encode_lockowner(xdr, lowner);
1354 }
1355
1356 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1357 {
1358         encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1359         encode_string(xdr, name->len, name->name);
1360 }
1361
1362 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1363 {
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 8);
1367         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1368         case FMODE_READ:
1369                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1370                 break;
1371         case FMODE_WRITE:
1372                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1373                 break;
1374         case FMODE_READ|FMODE_WRITE:
1375                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1376                 break;
1377         default:
1378                 *p++ = cpu_to_be32(0);
1379         }
1380         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1381 }
1382
1383 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1384 {
1385         __be32 *p;
1386  /*
1387  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1388  * owner 4 = 32
1389  */
1390         encode_nfs4_seqid(xdr, arg->seqid);
1391         encode_share_access(xdr, arg->fmode);
1392         p = reserve_space(xdr, 36);
1393         p = xdr_encode_hyper(p, arg->clientid);
1394         *p++ = cpu_to_be32(24);
1395         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1396         *p++ = cpu_to_be32(arg->server->s_dev);
1397         *p++ = cpu_to_be32(arg->id.uniquifier);
1398         xdr_encode_hyper(p, arg->id.create_time);
1399 }
1400
1401 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402 {
1403         struct iattr dummy;
1404         __be32 *p;
1405
1406         p = reserve_space(xdr, 4);
1407         switch(arg->createmode) {
1408         case NFS4_CREATE_UNCHECKED:
1409                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1410                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1411                 break;
1412         case NFS4_CREATE_GUARDED:
1413                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1414                 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1415                 break;
1416         case NFS4_CREATE_EXCLUSIVE:
1417                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1418                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1419                 break;
1420         case NFS4_CREATE_EXCLUSIVE4_1:
1421                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1422                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1423                 dummy.ia_valid = 0;
1424                 encode_attrs(xdr, &dummy, arg->label, arg->server);
1425         }
1426 }
1427
1428 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         switch (arg->open_flags & O_CREAT) {
1434         case 0:
1435                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1436                 break;
1437         default:
1438                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1439                 encode_createmode(xdr, arg);
1440         }
1441 }
1442
1443 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1444 {
1445         __be32 *p;
1446
1447         p = reserve_space(xdr, 4);
1448         switch (delegation_type) {
1449         case 0:
1450                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1451                 break;
1452         case FMODE_READ:
1453                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1454                 break;
1455         case FMODE_WRITE|FMODE_READ:
1456                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1457                 break;
1458         default:
1459                 BUG();
1460         }
1461 }
1462
1463 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1464 {
1465         __be32 *p;
1466
1467         p = reserve_space(xdr, 4);
1468         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1469         encode_string(xdr, name->len, name->name);
1470 }
1471
1472 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1473 {
1474         __be32 *p;
1475
1476         p = reserve_space(xdr, 4);
1477         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1478         encode_delegation_type(xdr, type);
1479 }
1480
1481 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4);
1486         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1487         encode_nfs4_stateid(xdr, stateid);
1488         encode_string(xdr, name->len, name->name);
1489 }
1490
1491 static inline void encode_claim_fh(struct xdr_stream *xdr)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 4);
1496         *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1497 }
1498
1499 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1500 {
1501         __be32 *p;
1502
1503         p = reserve_space(xdr, 4);
1504         *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1505         encode_nfs4_stateid(xdr, stateid);
1506 }
1507
1508 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1509 {
1510         encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1511         encode_openhdr(xdr, arg);
1512         encode_opentype(xdr, arg);
1513         switch (arg->claim) {
1514         case NFS4_OPEN_CLAIM_NULL:
1515                 encode_claim_null(xdr, arg->name);
1516                 break;
1517         case NFS4_OPEN_CLAIM_PREVIOUS:
1518                 encode_claim_previous(xdr, arg->u.delegation_type);
1519                 break;
1520         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1521                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1522                 break;
1523         case NFS4_OPEN_CLAIM_FH:
1524                 encode_claim_fh(xdr);
1525                 break;
1526         case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1527                 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1528                 break;
1529         default:
1530                 BUG();
1531         }
1532 }
1533
1534 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1535 {
1536         encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1537         encode_nfs4_stateid(xdr, arg->stateid);
1538         encode_nfs4_seqid(xdr, arg->seqid);
1539 }
1540
1541 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1542 {
1543         encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1544         encode_nfs4_stateid(xdr, arg->stateid);
1545         encode_nfs4_seqid(xdr, arg->seqid);
1546         encode_share_access(xdr, arg->fmode);
1547 }
1548
1549 static void
1550 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1551 {
1552         encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1553         encode_string(xdr, fh->size, fh->data);
1554 }
1555
1556 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1557 {
1558         encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1559 }
1560
1561 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1562                         struct compound_hdr *hdr)
1563 {
1564         __be32 *p;
1565
1566         encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1567         encode_nfs4_stateid(xdr, &args->stateid);
1568
1569         p = reserve_space(xdr, 12);
1570         p = xdr_encode_hyper(p, args->offset);
1571         *p = cpu_to_be32(args->count);
1572 }
1573
1574 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1575 {
1576         uint32_t attrs[3] = {
1577                 FATTR4_WORD0_RDATTR_ERROR,
1578                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1579         };
1580         uint32_t dircount = readdir->count >> 1;
1581         __be32 *p, verf[2];
1582         uint32_t attrlen = 0;
1583         unsigned int i;
1584
1585         if (readdir->plus) {
1586                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1587                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1588                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1589                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1590                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1591                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1592                 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1593                 dircount >>= 1;
1594         }
1595         /* Use mounted_on_fileid only if the server supports it */
1596         if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1597                 attrs[0] |= FATTR4_WORD0_FILEID;
1598         for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1599                 attrs[i] &= readdir->bitmask[i];
1600                 if (attrs[i] != 0)
1601                         attrlen = i+1;
1602         }
1603
1604         encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1605         encode_uint64(xdr, readdir->cookie);
1606         encode_nfs4_verifier(xdr, &readdir->verifier);
1607         p = reserve_space(xdr, 12 + (attrlen << 2));
1608         *p++ = cpu_to_be32(dircount);
1609         *p++ = cpu_to_be32(readdir->count);
1610         *p++ = cpu_to_be32(attrlen);
1611         for (i = 0; i < attrlen; i++)
1612                 *p++ = cpu_to_be32(attrs[i]);
1613         memcpy(verf, readdir->verifier.data, sizeof(verf));
1614
1615         dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1616                         __func__,
1617                         (unsigned long long)readdir->cookie,
1618                         verf[0], verf[1],
1619                         attrs[0] & readdir->bitmask[0],
1620                         attrs[1] & readdir->bitmask[1],
1621                         attrs[2] & readdir->bitmask[2]);
1622 }
1623
1624 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1625 {
1626         encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1627 }
1628
1629 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1630 {
1631         encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1632         encode_string(xdr, name->len, name->name);
1633 }
1634
1635 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1636 {
1637         encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1638         encode_string(xdr, oldname->len, oldname->name);
1639         encode_string(xdr, newname->len, newname->name);
1640 }
1641
1642 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1643                          struct compound_hdr *hdr)
1644 {
1645         encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1646         encode_uint64(xdr, clid);
1647 }
1648
1649 static void
1650 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1651 {
1652         encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1653 }
1654
1655 static void
1656 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1657 {
1658         __be32 *p;
1659
1660         encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1661         encode_nfs4_stateid(xdr, &zero_stateid);
1662         p = reserve_space(xdr, 2*4);
1663         *p++ = cpu_to_be32(1);
1664         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1665         p = reserve_space(xdr, 4);
1666         *p = cpu_to_be32(arg->acl_len);
1667         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1668 }
1669
1670 static void
1671 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1672 {
1673         encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1674 }
1675
1676 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1677 {
1678         encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1679         encode_nfs4_stateid(xdr, &arg->stateid);
1680         encode_attrs(xdr, arg->iap, arg->label, server);
1681 }
1682
1683 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1684 {
1685         __be32 *p;
1686
1687         encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1688         encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1689
1690         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1691         p = reserve_space(xdr, 4);
1692         *p = cpu_to_be32(setclientid->sc_prog);
1693         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1694         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1695         p = reserve_space(xdr, 4);
1696         *p = cpu_to_be32(setclientid->sc_cb_ident);
1697 }
1698
1699 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1700 {
1701         encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1702                         decode_setclientid_confirm_maxsz, hdr);
1703         encode_uint64(xdr, arg->clientid);
1704         encode_nfs4_verifier(xdr, &arg->confirm);
1705 }
1706
1707 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1708                          struct compound_hdr *hdr)
1709 {
1710         __be32 *p;
1711
1712         encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1713         encode_nfs4_stateid(xdr, &args->stateid);
1714
1715         p = reserve_space(xdr, 16);
1716         p = xdr_encode_hyper(p, args->offset);
1717         *p++ = cpu_to_be32(args->stable);
1718         *p = cpu_to_be32(args->count);
1719
1720         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1721 }
1722
1723 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1724 {
1725         encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1726         encode_nfs4_stateid(xdr, stateid);
1727 }
1728
1729 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1730 {
1731         encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1732         encode_string(xdr, name->len, name->name);
1733 }
1734
1735 #if defined(CONFIG_NFS_V4_1)
1736 /* NFSv4.1 operations */
1737 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1738                                    struct nfs4_session *session,
1739                                    struct compound_hdr *hdr)
1740 {
1741         __be32 *p;
1742
1743         encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1744                 decode_bind_conn_to_session_maxsz, hdr);
1745         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1746         p = xdr_reserve_space(xdr, 8);
1747         *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1748         *p = 0; /* use_conn_in_rdma_mode = False */
1749 }
1750
1751 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1752 {
1753         unsigned int i;
1754         encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1755         for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1756                 encode_uint32(xdr, op_map->u.words[i]);
1757 }
1758
1759 static void encode_exchange_id(struct xdr_stream *xdr,
1760                                struct nfs41_exchange_id_args *args,
1761                                struct compound_hdr *hdr)
1762 {
1763         __be32 *p;
1764         char impl_name[IMPL_NAME_LIMIT];
1765         int len = 0;
1766
1767         encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1768         encode_nfs4_verifier(xdr, args->verifier);
1769
1770         encode_string(xdr, args->id_len, args->id);
1771
1772         encode_uint32(xdr, args->flags);
1773         encode_uint32(xdr, args->state_protect.how);
1774
1775         switch (args->state_protect.how) {
1776         case SP4_NONE:
1777                 break;
1778         case SP4_MACH_CRED:
1779                 encode_op_map(xdr, &args->state_protect.enforce);
1780                 encode_op_map(xdr, &args->state_protect.allow);
1781                 break;
1782         default:
1783                 WARN_ON_ONCE(1);
1784                 break;
1785         }
1786
1787         if (send_implementation_id &&
1788             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1789             sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1790                 <= sizeof(impl_name) + 1)
1791                 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1792                                utsname()->sysname, utsname()->release,
1793                                utsname()->version, utsname()->machine);
1794
1795         if (len > 0) {
1796                 encode_uint32(xdr, 1);  /* implementation id array length=1 */
1797
1798                 encode_string(xdr,
1799                         sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1800                         CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1801                 encode_string(xdr, len, impl_name);
1802                 /* just send zeros for nii_date - the date is in nii_name */
1803                 p = reserve_space(xdr, 12);
1804                 p = xdr_encode_hyper(p, 0);
1805                 *p = cpu_to_be32(0);
1806         } else
1807                 encode_uint32(xdr, 0);  /* implementation id array length=0 */
1808 }
1809
1810 static void encode_create_session(struct xdr_stream *xdr,
1811                                   struct nfs41_create_session_args *args,
1812                                   struct compound_hdr *hdr)
1813 {
1814         __be32 *p;
1815         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1816         uint32_t len;
1817         struct nfs_client *clp = args->client;
1818         struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1819         u32 max_resp_sz_cached;
1820
1821         /*
1822          * Assumes OPEN is the biggest non-idempotent compound.
1823          * 2 is the verifier.
1824          */
1825         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1826                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1827
1828         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1829                         clp->cl_ipaddr);
1830
1831         encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1832         p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1833         p = xdr_encode_hyper(p, clp->cl_clientid);
1834         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1835         *p++ = cpu_to_be32(args->flags);                        /*flags */
1836
1837         /* Fore Channel */
1838         *p++ = cpu_to_be32(0);                          /* header padding size */
1839         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1840         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1841         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1842         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1843         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1844         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1845
1846         /* Back Channel */
1847         *p++ = cpu_to_be32(0);                          /* header padding size */
1848         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1849         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1850         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1851         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1852         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1853         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1854
1855         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1856         *p++ = cpu_to_be32(1);
1857         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1858
1859         /* authsys_parms rfc1831 */
1860         *p++ = cpu_to_be32(nn->boot_time.tv_nsec);      /* stamp */
1861         p = xdr_encode_opaque(p, machine_name, len);
1862         *p++ = cpu_to_be32(0);                          /* UID */
1863         *p++ = cpu_to_be32(0);                          /* GID */
1864         *p = cpu_to_be32(0);                            /* No more gids */
1865 }
1866
1867 static void encode_destroy_session(struct xdr_stream *xdr,
1868                                    struct nfs4_session *session,
1869                                    struct compound_hdr *hdr)
1870 {
1871         encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1872         encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1873 }
1874
1875 static void encode_destroy_clientid(struct xdr_stream *xdr,
1876                                    uint64_t clientid,
1877                                    struct compound_hdr *hdr)
1878 {
1879         encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1880         encode_uint64(xdr, clientid);
1881 }
1882
1883 static void encode_reclaim_complete(struct xdr_stream *xdr,
1884                                     struct nfs41_reclaim_complete_args *args,
1885                                     struct compound_hdr *hdr)
1886 {
1887         encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1888         encode_uint32(xdr, args->one_fs);
1889 }
1890 #endif /* CONFIG_NFS_V4_1 */
1891
1892 static void encode_sequence(struct xdr_stream *xdr,
1893                             const struct nfs4_sequence_args *args,
1894                             struct compound_hdr *hdr)
1895 {
1896 #if defined(CONFIG_NFS_V4_1)
1897         struct nfs4_session *session;
1898         struct nfs4_slot_table *tp;
1899         struct nfs4_slot *slot = args->sa_slot;
1900         __be32 *p;
1901
1902         tp = slot->table;
1903         session = tp->session;
1904         if (!session)
1905                 return;
1906
1907         encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1908
1909         /*
1910          * Sessionid + seqid + slotid + max slotid + cache_this
1911          */
1912         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1913                 "max_slotid=%d cache_this=%d\n",
1914                 __func__,
1915                 ((u32 *)session->sess_id.data)[0],
1916                 ((u32 *)session->sess_id.data)[1],
1917                 ((u32 *)session->sess_id.data)[2],
1918                 ((u32 *)session->sess_id.data)[3],
1919                 slot->seq_nr, slot->slot_nr,
1920                 tp->highest_used_slotid, args->sa_cache_this);
1921         p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1922         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1923         *p++ = cpu_to_be32(slot->seq_nr);
1924         *p++ = cpu_to_be32(slot->slot_nr);
1925         *p++ = cpu_to_be32(tp->highest_used_slotid);
1926         *p = cpu_to_be32(args->sa_cache_this);
1927 #endif /* CONFIG_NFS_V4_1 */
1928 }
1929
1930 #ifdef CONFIG_NFS_V4_1
1931 static void
1932 encode_getdevicelist(struct xdr_stream *xdr,
1933                      const struct nfs4_getdevicelist_args *args,
1934                      struct compound_hdr *hdr)
1935 {
1936         __be32 *p;
1937         nfs4_verifier dummy = {
1938                 .data = "dummmmmy",
1939         };
1940
1941         encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr);
1942         p = reserve_space(xdr, 16);
1943         *p++ = cpu_to_be32(args->layoutclass);
1944         *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
1945         xdr_encode_hyper(p, 0ULL);                          /* cookie */
1946         encode_nfs4_verifier(xdr, &dummy);
1947 }
1948
1949 static void
1950 encode_getdeviceinfo(struct xdr_stream *xdr,
1951                      const struct nfs4_getdeviceinfo_args *args,
1952                      struct compound_hdr *hdr)
1953 {
1954         __be32 *p;
1955
1956         encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1957         p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE);
1958         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1959                                     NFS4_DEVICEID4_SIZE);
1960         *p++ = cpu_to_be32(args->pdev->layout_type);
1961         *p++ = cpu_to_be32(args->pdev->maxcount);       /* gdia_maxcount */
1962         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1963 }
1964
1965 static void
1966 encode_layoutget(struct xdr_stream *xdr,
1967                       const struct nfs4_layoutget_args *args,
1968                       struct compound_hdr *hdr)
1969 {
1970         __be32 *p;
1971
1972         encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1973         p = reserve_space(xdr, 36);
1974         *p++ = cpu_to_be32(0);     /* Signal layout available */
1975         *p++ = cpu_to_be32(args->type);
1976         *p++ = cpu_to_be32(args->range.iomode);
1977         p = xdr_encode_hyper(p, args->range.offset);
1978         p = xdr_encode_hyper(p, args->range.length);
1979         p = xdr_encode_hyper(p, args->minlength);
1980         encode_nfs4_stateid(xdr, &args->stateid);
1981         encode_uint32(xdr, args->maxcount);
1982
1983         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1984                 __func__,
1985                 args->type,
1986                 args->range.iomode,
1987                 (unsigned long)args->range.offset,
1988                 (unsigned long)args->range.length,
1989                 args->maxcount);
1990 }
1991
1992 static int
1993 encode_layoutcommit(struct xdr_stream *xdr,
1994                     struct inode *inode,
1995                     const struct nfs4_layoutcommit_args *args,
1996                     struct compound_hdr *hdr)
1997 {
1998         __be32 *p;
1999
2000         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2001                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2002
2003         encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2004         p = reserve_space(xdr, 20);
2005         /* Only whole file layouts */
2006         p = xdr_encode_hyper(p, 0); /* offset */
2007         p = xdr_encode_hyper(p, args->lastbytewritten + 1);     /* length */
2008         *p = cpu_to_be32(0); /* reclaim */
2009         encode_nfs4_stateid(xdr, &args->stateid);
2010         p = reserve_space(xdr, 20);
2011         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2012         p = xdr_encode_hyper(p, args->lastbytewritten);
2013         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2014         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2015
2016         if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
2017                 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2018                         NFS_I(inode)->layout, xdr, args);
2019         else
2020                 encode_uint32(xdr, 0); /* no layout-type payload */
2021
2022         return 0;
2023 }
2024
2025 static void
2026 encode_layoutreturn(struct xdr_stream *xdr,
2027                     const struct nfs4_layoutreturn_args *args,
2028                     struct compound_hdr *hdr)
2029 {
2030         __be32 *p;
2031
2032         encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2033         p = reserve_space(xdr, 16);
2034         *p++ = cpu_to_be32(0);          /* reclaim. always 0 for now */
2035         *p++ = cpu_to_be32(args->layout_type);
2036         *p++ = cpu_to_be32(IOMODE_ANY);
2037         *p = cpu_to_be32(RETURN_FILE);
2038         p = reserve_space(xdr, 16);
2039         p = xdr_encode_hyper(p, 0);
2040         p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2041         spin_lock(&args->inode->i_lock);
2042         encode_nfs4_stateid(xdr, &args->stateid);
2043         spin_unlock(&args->inode->i_lock);
2044         if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2045                 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2046                         NFS_I(args->inode)->layout, xdr, args);
2047         } else
2048                 encode_uint32(xdr, 0);
2049 }
2050
2051 static int
2052 encode_secinfo_no_name(struct xdr_stream *xdr,
2053                        const struct nfs41_secinfo_no_name_args *args,
2054                        struct compound_hdr *hdr)
2055 {
2056         encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2057         encode_uint32(xdr, args->style);
2058         return 0;
2059 }
2060
2061 static void encode_test_stateid(struct xdr_stream *xdr,
2062                                 struct nfs41_test_stateid_args *args,
2063                                 struct compound_hdr *hdr)
2064 {
2065         encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2066         encode_uint32(xdr, 1);
2067         encode_nfs4_stateid(xdr, args->stateid);
2068 }
2069
2070 static void encode_free_stateid(struct xdr_stream *xdr,
2071                                 struct nfs41_free_stateid_args *args,
2072                                 struct compound_hdr *hdr)
2073 {
2074         encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2075         encode_nfs4_stateid(xdr, &args->stateid);
2076 }
2077 #endif /* CONFIG_NFS_V4_1 */
2078
2079 /*
2080  * END OF "GENERIC" ENCODE ROUTINES.
2081  */
2082
2083 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2084 {
2085 #if defined(CONFIG_NFS_V4_1)
2086         struct nfs4_session *session = args->sa_slot->table->session;
2087         if (session)
2088                 return session->clp->cl_mvops->minor_version;
2089 #endif /* CONFIG_NFS_V4_1 */
2090         return 0;
2091 }
2092
2093 /*
2094  * Encode an ACCESS request
2095  */
2096 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2097                                 const struct nfs4_accessargs *args)
2098 {
2099         struct compound_hdr hdr = {
2100                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2101         };
2102
2103         encode_compound_hdr(xdr, req, &hdr);
2104         encode_sequence(xdr, &args->seq_args, &hdr);
2105         encode_putfh(xdr, args->fh, &hdr);
2106         encode_access(xdr, args->access, &hdr);
2107         encode_getfattr(xdr, args->bitmask, &hdr);
2108         encode_nops(&hdr);
2109 }
2110
2111 /*
2112  * Encode LOOKUP request
2113  */
2114 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2115                                 const struct nfs4_lookup_arg *args)
2116 {
2117         struct compound_hdr hdr = {
2118                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2119         };
2120
2121         encode_compound_hdr(xdr, req, &hdr);
2122         encode_sequence(xdr, &args->seq_args, &hdr);
2123         encode_putfh(xdr, args->dir_fh, &hdr);
2124         encode_lookup(xdr, args->name, &hdr);
2125         encode_getfh(xdr, &hdr);
2126         encode_getfattr(xdr, args->bitmask, &hdr);
2127         encode_nops(&hdr);
2128 }
2129
2130 /*
2131  * Encode LOOKUP_ROOT request
2132  */
2133 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2134                                      struct xdr_stream *xdr,
2135                                      const struct nfs4_lookup_root_arg *args)
2136 {
2137         struct compound_hdr hdr = {
2138                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139         };
2140
2141         encode_compound_hdr(xdr, req, &hdr);
2142         encode_sequence(xdr, &args->seq_args, &hdr);
2143         encode_putrootfh(xdr, &hdr);
2144         encode_getfh(xdr, &hdr);
2145         encode_getfattr(xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147 }
2148
2149 /*
2150  * Encode REMOVE request
2151  */
2152 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2153                                 const struct nfs_removeargs *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->fh, &hdr);
2162         encode_remove(xdr, &args->name, &hdr);
2163         encode_nops(&hdr);
2164 }
2165
2166 /*
2167  * Encode RENAME request
2168  */
2169 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2170                                 const struct nfs_renameargs *args)
2171 {
2172         struct compound_hdr hdr = {
2173                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2174         };
2175
2176         encode_compound_hdr(xdr, req, &hdr);
2177         encode_sequence(xdr, &args->seq_args, &hdr);
2178         encode_putfh(xdr, args->old_dir, &hdr);
2179         encode_savefh(xdr, &hdr);
2180         encode_putfh(xdr, args->new_dir, &hdr);
2181         encode_rename(xdr, args->old_name, args->new_name, &hdr);
2182         encode_nops(&hdr);
2183 }
2184
2185 /*
2186  * Encode LINK request
2187  */
2188 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2189                              const struct nfs4_link_arg *args)
2190 {
2191         struct compound_hdr hdr = {
2192                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193         };
2194
2195         encode_compound_hdr(xdr, req, &hdr);
2196         encode_sequence(xdr, &args->seq_args, &hdr);
2197         encode_putfh(xdr, args->fh, &hdr);
2198         encode_savefh(xdr, &hdr);
2199         encode_putfh(xdr, args->dir_fh, &hdr);
2200         encode_link(xdr, args->name, &hdr);
2201         encode_restorefh(xdr, &hdr);
2202         encode_getfattr(xdr, args->bitmask, &hdr);
2203         encode_nops(&hdr);
2204 }
2205
2206 /*
2207  * Encode CREATE request
2208  */
2209 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2210                                 const struct nfs4_create_arg *args)
2211 {
2212         struct compound_hdr hdr = {
2213                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2214         };
2215
2216         encode_compound_hdr(xdr, req, &hdr);
2217         encode_sequence(xdr, &args->seq_args, &hdr);
2218         encode_putfh(xdr, args->dir_fh, &hdr);
2219         encode_create(xdr, args, &hdr);
2220         encode_getfh(xdr, &hdr);
2221         encode_getfattr(xdr, args->bitmask, &hdr);
2222         encode_nops(&hdr);
2223 }
2224
2225 /*
2226  * Encode SYMLINK request
2227  */
2228 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2229                                  const struct nfs4_create_arg *args)
2230 {
2231         nfs4_xdr_enc_create(req, xdr, args);
2232 }
2233
2234 /*
2235  * Encode GETATTR request
2236  */
2237 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2238                                  const struct nfs4_getattr_arg *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_getfattr(xdr, args->bitmask, &hdr);
2248         encode_nops(&hdr);
2249 }
2250
2251 /*
2252  * Encode a CLOSE request
2253  */
2254 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2255                                struct nfs_closeargs *args)
2256 {
2257         struct compound_hdr hdr = {
2258                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2259         };
2260
2261         encode_compound_hdr(xdr, req, &hdr);
2262         encode_sequence(xdr, &args->seq_args, &hdr);
2263         encode_putfh(xdr, args->fh, &hdr);
2264         encode_close(xdr, args, &hdr);
2265         encode_getfattr(xdr, args->bitmask, &hdr);
2266         encode_nops(&hdr);
2267 }
2268
2269 /*
2270  * Encode an OPEN request
2271  */
2272 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2273                               struct nfs_openargs *args)
2274 {
2275         struct compound_hdr hdr = {
2276                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2277         };
2278
2279         encode_compound_hdr(xdr, req, &hdr);
2280         encode_sequence(xdr, &args->seq_args, &hdr);
2281         encode_putfh(xdr, args->fh, &hdr);
2282         encode_open(xdr, args, &hdr);
2283         encode_getfh(xdr, &hdr);
2284         if (args->access)
2285                 encode_access(xdr, args->access, &hdr);
2286         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2287         encode_nops(&hdr);
2288 }
2289
2290 /*
2291  * Encode an OPEN_CONFIRM request
2292  */
2293 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2294                                       struct xdr_stream *xdr,
2295                                       struct nfs_open_confirmargs *args)
2296 {
2297         struct compound_hdr hdr = {
2298                 .nops   = 0,
2299         };
2300
2301         encode_compound_hdr(xdr, req, &hdr);
2302         encode_putfh(xdr, args->fh, &hdr);
2303         encode_open_confirm(xdr, args, &hdr);
2304         encode_nops(&hdr);
2305 }
2306
2307 /*
2308  * Encode an OPEN request with no attributes.
2309  */
2310 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2311                                      struct xdr_stream *xdr,
2312                                      struct nfs_openargs *args)
2313 {
2314         struct compound_hdr hdr = {
2315                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2316         };
2317
2318         encode_compound_hdr(xdr, req, &hdr);
2319         encode_sequence(xdr, &args->seq_args, &hdr);
2320         encode_putfh(xdr, args->fh, &hdr);
2321         encode_open(xdr, args, &hdr);
2322         if (args->access)
2323                 encode_access(xdr, args->access, &hdr);
2324         encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2325         encode_nops(&hdr);
2326 }
2327
2328 /*
2329  * Encode an OPEN_DOWNGRADE request
2330  */
2331 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2332                                         struct xdr_stream *xdr,
2333                                         struct nfs_closeargs *args)
2334 {
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         encode_compound_hdr(xdr, req, &hdr);
2340         encode_sequence(xdr, &args->seq_args, &hdr);
2341         encode_putfh(xdr, args->fh, &hdr);
2342         encode_open_downgrade(xdr, args, &hdr);
2343         encode_getfattr(xdr, args->bitmask, &hdr);
2344         encode_nops(&hdr);
2345 }
2346
2347 /*
2348  * Encode a LOCK request
2349  */
2350 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2351                               struct nfs_lock_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_lock(xdr, args, &hdr);
2361         encode_nops(&hdr);
2362 }
2363
2364 /*
2365  * Encode a LOCKT request
2366  */
2367 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2368                                struct nfs_lockt_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_lockt(xdr, args, &hdr);
2378         encode_nops(&hdr);
2379 }
2380
2381 /*
2382  * Encode a LOCKU request
2383  */
2384 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2385                                struct nfs_locku_args *args)
2386 {
2387         struct compound_hdr hdr = {
2388                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2389         };
2390
2391         encode_compound_hdr(xdr, req, &hdr);
2392         encode_sequence(xdr, &args->seq_args, &hdr);
2393         encode_putfh(xdr, args->fh, &hdr);
2394         encode_locku(xdr, args, &hdr);
2395         encode_nops(&hdr);
2396 }
2397
2398 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2399                                            struct xdr_stream *xdr,
2400                                         struct nfs_release_lockowner_args *args)
2401 {
2402         struct compound_hdr hdr = {
2403                 .minorversion = 0,
2404         };
2405
2406         encode_compound_hdr(xdr, req, &hdr);
2407         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 /*
2412  * Encode a READLINK request
2413  */
2414 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2415                                   const struct nfs4_readlink *args)
2416 {
2417         struct compound_hdr hdr = {
2418                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2419         };
2420
2421         encode_compound_hdr(xdr, req, &hdr);
2422         encode_sequence(xdr, &args->seq_args, &hdr);
2423         encode_putfh(xdr, args->fh, &hdr);
2424         encode_readlink(xdr, args, req, &hdr);
2425
2426         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2427                         args->pgbase, args->pglen);
2428         encode_nops(&hdr);
2429 }
2430
2431 /*
2432  * Encode a READDIR request
2433  */
2434 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2435                                  const struct nfs4_readdir_arg *args)
2436 {
2437         struct compound_hdr hdr = {
2438                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439         };
2440
2441         encode_compound_hdr(xdr, req, &hdr);
2442         encode_sequence(xdr, &args->seq_args, &hdr);
2443         encode_putfh(xdr, args->fh, &hdr);
2444         encode_readdir(xdr, args, req, &hdr);
2445
2446         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447                          args->pgbase, args->count);
2448         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2449                         __func__, hdr.replen << 2, args->pages,
2450                         args->pgbase, args->count);
2451         encode_nops(&hdr);
2452 }
2453
2454 /*
2455  * Encode a READ request
2456  */
2457 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2458                               struct nfs_pgio_args *args)
2459 {
2460         struct compound_hdr hdr = {
2461                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462         };
2463
2464         encode_compound_hdr(xdr, req, &hdr);
2465         encode_sequence(xdr, &args->seq_args, &hdr);
2466         encode_putfh(xdr, args->fh, &hdr);
2467         encode_read(xdr, args, &hdr);
2468
2469         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2470                          args->pages, args->pgbase, args->count);
2471         req->rq_rcv_buf.flags |= XDRBUF_READ;
2472         encode_nops(&hdr);
2473 }
2474
2475 /*
2476  * Encode an SETATTR request
2477  */
2478 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2479                                  struct nfs_setattrargs *args)
2480 {
2481         struct compound_hdr hdr = {
2482                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2483         };
2484
2485         encode_compound_hdr(xdr, req, &hdr);
2486         encode_sequence(xdr, &args->seq_args, &hdr);
2487         encode_putfh(xdr, args->fh, &hdr);
2488         encode_setattr(xdr, args, args->server, &hdr);
2489         encode_getfattr(xdr, args->bitmask, &hdr);
2490         encode_nops(&hdr);
2491 }
2492
2493 /*
2494  * Encode a GETACL request
2495  */
2496 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2497                                 struct nfs_getaclargs *args)
2498 {
2499         struct compound_hdr hdr = {
2500                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2501         };
2502         uint32_t replen;
2503
2504         encode_compound_hdr(xdr, req, &hdr);
2505         encode_sequence(xdr, &args->seq_args, &hdr);
2506         encode_putfh(xdr, args->fh, &hdr);
2507         replen = hdr.replen + op_decode_hdr_maxsz;
2508         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2509
2510         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2511                 args->acl_pages, args->acl_pgbase, args->acl_len);
2512
2513         encode_nops(&hdr);
2514 }
2515
2516 /*
2517  * Encode a WRITE request
2518  */
2519 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2520                                struct nfs_pgio_args *args)
2521 {
2522         struct compound_hdr hdr = {
2523                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2524         };
2525
2526         encode_compound_hdr(xdr, req, &hdr);
2527         encode_sequence(xdr, &args->seq_args, &hdr);
2528         encode_putfh(xdr, args->fh, &hdr);
2529         encode_write(xdr, args, &hdr);
2530         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2531         if (args->bitmask)
2532                 encode_getfattr(xdr, args->bitmask, &hdr);
2533         encode_nops(&hdr);
2534 }
2535
2536 /*
2537  *  a COMMIT request
2538  */
2539 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2540                                 struct nfs_commitargs *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_commit(xdr, args, &hdr);
2550         encode_nops(&hdr);
2551 }
2552
2553 /*
2554  * FSINFO request
2555  */
2556 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2557                                 struct nfs4_fsinfo_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_fsinfo(xdr, args->bitmask, &hdr);
2567         encode_nops(&hdr);
2568 }
2569
2570 /*
2571  * a PATHCONF request
2572  */
2573 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2574                                   const struct nfs4_pathconf_arg *args)
2575 {
2576         struct compound_hdr hdr = {
2577                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578         };
2579
2580         encode_compound_hdr(xdr, req, &hdr);
2581         encode_sequence(xdr, &args->seq_args, &hdr);
2582         encode_putfh(xdr, args->fh, &hdr);
2583         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2584                            &hdr);
2585         encode_nops(&hdr);
2586 }
2587
2588 /*
2589  * a STATFS request
2590  */
2591 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2592                                 const struct nfs4_statfs_arg *args)
2593 {
2594         struct compound_hdr hdr = {
2595                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2596         };
2597
2598         encode_compound_hdr(xdr, req, &hdr);
2599         encode_sequence(xdr, &args->seq_args, &hdr);
2600         encode_putfh(xdr, args->fh, &hdr);
2601         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2602                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2603         encode_nops(&hdr);
2604 }
2605
2606 /*
2607  * GETATTR_BITMAP request
2608  */
2609 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2610                                      struct xdr_stream *xdr,
2611                                      struct nfs4_server_caps_arg *args)
2612 {
2613         struct compound_hdr hdr = {
2614                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2615         };
2616
2617         encode_compound_hdr(xdr, req, &hdr);
2618         encode_sequence(xdr, &args->seq_args, &hdr);
2619         encode_putfh(xdr, args->fhandle, &hdr);
2620         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2621                            FATTR4_WORD0_FH_EXPIRE_TYPE|
2622                            FATTR4_WORD0_LINK_SUPPORT|
2623                            FATTR4_WORD0_SYMLINK_SUPPORT|
2624                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2625         encode_nops(&hdr);
2626 }
2627
2628 /*
2629  * a RENEW request
2630  */
2631 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2632                                struct nfs_client *clp)
2633 {
2634         struct compound_hdr hdr = {
2635                 .nops   = 0,
2636         };
2637
2638         encode_compound_hdr(xdr, req, &hdr);
2639         encode_renew(xdr, clp->cl_clientid, &hdr);
2640         encode_nops(&hdr);
2641 }
2642
2643 /*
2644  * a SETCLIENTID request
2645  */
2646 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2647                                      struct xdr_stream *xdr,
2648                                      struct nfs4_setclientid *sc)
2649 {
2650         struct compound_hdr hdr = {
2651                 .nops   = 0,
2652         };
2653
2654         encode_compound_hdr(xdr, req, &hdr);
2655         encode_setclientid(xdr, sc, &hdr);
2656         encode_nops(&hdr);
2657 }
2658
2659 /*
2660  * a SETCLIENTID_CONFIRM request
2661  */
2662 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2663                                              struct xdr_stream *xdr,
2664                                              struct nfs4_setclientid_res *arg)
2665 {
2666         struct compound_hdr hdr = {
2667                 .nops   = 0,
2668         };
2669
2670         encode_compound_hdr(xdr, req, &hdr);
2671         encode_setclientid_confirm(xdr, arg, &hdr);
2672         encode_nops(&hdr);
2673 }
2674
2675 /*
2676  * DELEGRETURN request
2677  */
2678 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2679                                      struct xdr_stream *xdr,
2680                                      const struct nfs4_delegreturnargs *args)
2681 {
2682         struct compound_hdr hdr = {
2683                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2684         };
2685
2686         encode_compound_hdr(xdr, req, &hdr);
2687         encode_sequence(xdr, &args->seq_args, &hdr);
2688         encode_putfh(xdr, args->fhandle, &hdr);
2689         encode_getfattr(xdr, args->bitmask, &hdr);
2690         encode_delegreturn(xdr, args->stateid, &hdr);
2691         encode_nops(&hdr);
2692 }
2693
2694 /*
2695  * Encode FS_LOCATIONS request
2696  */
2697 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2698                                       struct xdr_stream *xdr,
2699                                       struct nfs4_fs_locations_arg *args)
2700 {
2701         struct compound_hdr hdr = {
2702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2703         };
2704         uint32_t replen;
2705
2706         encode_compound_hdr(xdr, req, &hdr);
2707         encode_sequence(xdr, &args->seq_args, &hdr);
2708         if (args->migration) {
2709                 encode_putfh(xdr, args->fh, &hdr);
2710                 replen = hdr.replen;
2711                 encode_fs_locations(xdr, args->bitmask, &hdr);
2712                 if (args->renew)
2713                         encode_renew(xdr, args->clientid, &hdr);
2714         } else {
2715                 encode_putfh(xdr, args->dir_fh, &hdr);
2716                 encode_lookup(xdr, args->name, &hdr);
2717                 replen = hdr.replen;
2718                 encode_fs_locations(xdr, args->bitmask, &hdr);
2719         }
2720
2721         /* Set up reply kvec to capture returned fs_locations array. */
2722         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2723                         0, PAGE_SIZE);
2724         encode_nops(&hdr);
2725 }
2726
2727 /*
2728  * Encode SECINFO request
2729  */
2730 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2731                                 struct xdr_stream *xdr,
2732                                 struct nfs4_secinfo_arg *args)
2733 {
2734         struct compound_hdr hdr = {
2735                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2736         };
2737
2738         encode_compound_hdr(xdr, req, &hdr);
2739         encode_sequence(xdr, &args->seq_args, &hdr);
2740         encode_putfh(xdr, args->dir_fh, &hdr);
2741         encode_secinfo(xdr, args->name, &hdr);
2742         encode_nops(&hdr);
2743 }
2744
2745 /*
2746  * Encode FSID_PRESENT request
2747  */
2748 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2749                                       struct xdr_stream *xdr,
2750                                       struct nfs4_fsid_present_arg *args)
2751 {
2752         struct compound_hdr hdr = {
2753                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2754         };
2755
2756         encode_compound_hdr(xdr, req, &hdr);
2757         encode_sequence(xdr, &args->seq_args, &hdr);
2758         encode_putfh(xdr, args->fh, &hdr);
2759         encode_getfh(xdr, &hdr);
2760         if (args->renew)
2761                 encode_renew(xdr, args->clientid, &hdr);
2762         encode_nops(&hdr);
2763 }
2764
2765 #if defined(CONFIG_NFS_V4_1)
2766 /*
2767  * BIND_CONN_TO_SESSION request
2768  */
2769 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2770                                 struct xdr_stream *xdr,
2771                                 struct nfs_client *clp)
2772 {
2773         struct compound_hdr hdr = {
2774                 .minorversion = clp->cl_mvops->minor_version,
2775         };
2776
2777         encode_compound_hdr(xdr, req, &hdr);
2778         encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2779         encode_nops(&hdr);
2780 }
2781
2782 /*
2783  * EXCHANGE_ID request
2784  */
2785 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2786                                      struct xdr_stream *xdr,
2787                                      struct nfs41_exchange_id_args *args)
2788 {
2789         struct compound_hdr hdr = {
2790                 .minorversion = args->client->cl_mvops->minor_version,
2791         };
2792
2793         encode_compound_hdr(xdr, req, &hdr);
2794         encode_exchange_id(xdr, args, &hdr);
2795         encode_nops(&hdr);
2796 }
2797
2798 /*
2799  * a CREATE_SESSION request
2800  */
2801 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2802                                         struct xdr_stream *xdr,
2803                                         struct nfs41_create_session_args *args)
2804 {
2805         struct compound_hdr hdr = {
2806                 .minorversion = args->client->cl_mvops->minor_version,
2807         };
2808
2809         encode_compound_hdr(xdr, req, &hdr);
2810         encode_create_session(xdr, args, &hdr);
2811         encode_nops(&hdr);
2812 }
2813
2814 /*
2815  * a DESTROY_SESSION request
2816  */
2817 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2818                                          struct xdr_stream *xdr,
2819                                          struct nfs4_session *session)
2820 {
2821         struct compound_hdr hdr = {
2822                 .minorversion = session->clp->cl_mvops->minor_version,
2823         };
2824
2825         encode_compound_hdr(xdr, req, &hdr);
2826         encode_destroy_session(xdr, session, &hdr);
2827         encode_nops(&hdr);
2828 }
2829
2830 /*
2831  * a DESTROY_CLIENTID request
2832  */
2833 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2834                                          struct xdr_stream *xdr,
2835                                          struct nfs_client *clp)
2836 {
2837         struct compound_hdr hdr = {
2838                 .minorversion = clp->cl_mvops->minor_version,
2839         };
2840
2841         encode_compound_hdr(xdr, req, &hdr);
2842         encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2843         encode_nops(&hdr);
2844 }
2845
2846 /*
2847  * a SEQUENCE request
2848  */
2849 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2850                                   struct nfs4_sequence_args *args)
2851 {
2852         struct compound_hdr hdr = {
2853                 .minorversion = nfs4_xdr_minorversion(args),
2854         };
2855
2856         encode_compound_hdr(xdr, req, &hdr);
2857         encode_sequence(xdr, args, &hdr);
2858         encode_nops(&hdr);
2859 }
2860
2861 /*
2862  * a GET_LEASE_TIME request
2863  */
2864 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2865                                         struct xdr_stream *xdr,
2866                                         struct nfs4_get_lease_time_args *args)
2867 {
2868         struct compound_hdr hdr = {
2869                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2870         };
2871         const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2872
2873         encode_compound_hdr(xdr, req, &hdr);
2874         encode_sequence(xdr, &args->la_seq_args, &hdr);
2875         encode_putrootfh(xdr, &hdr);
2876         encode_fsinfo(xdr, lease_bitmap, &hdr);
2877         encode_nops(&hdr);
2878 }
2879
2880 /*
2881  * a RECLAIM_COMPLETE request
2882  */
2883 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2884                                           struct xdr_stream *xdr,
2885                                 struct nfs41_reclaim_complete_args *args)
2886 {
2887         struct compound_hdr hdr = {
2888                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2889         };
2890
2891         encode_compound_hdr(xdr, req, &hdr);
2892         encode_sequence(xdr, &args->seq_args, &hdr);
2893         encode_reclaim_complete(xdr, args, &hdr);
2894         encode_nops(&hdr);
2895 }
2896
2897 /*
2898  * Encode GETDEVICELIST request
2899  */
2900 static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
2901                                        struct xdr_stream *xdr,
2902                                        struct nfs4_getdevicelist_args *args)
2903 {
2904         struct compound_hdr hdr = {
2905                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2906         };
2907
2908         encode_compound_hdr(xdr, req, &hdr);
2909         encode_sequence(xdr, &args->seq_args, &hdr);
2910         encode_putfh(xdr, args->fh, &hdr);
2911         encode_getdevicelist(xdr, args, &hdr);
2912         encode_nops(&hdr);
2913 }
2914
2915 /*
2916  * Encode GETDEVICEINFO request
2917  */
2918 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2919                                        struct xdr_stream *xdr,
2920                                        struct nfs4_getdeviceinfo_args *args)
2921 {
2922         struct compound_hdr hdr = {
2923                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2924         };
2925
2926         encode_compound_hdr(xdr, req, &hdr);
2927         encode_sequence(xdr, &args->seq_args, &hdr);
2928         encode_getdeviceinfo(xdr, args, &hdr);
2929
2930         /* set up reply kvec. Subtract notification bitmap max size (2)
2931          * so that notification bitmap is put in xdr_buf tail */
2932         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2933                          args->pdev->pages, args->pdev->pgbase,
2934                          args->pdev->pglen);
2935
2936         encode_nops(&hdr);
2937 }
2938
2939 /*
2940  *  Encode LAYOUTGET request
2941  */
2942 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2943                                    struct xdr_stream *xdr,
2944                                    struct nfs4_layoutget_args *args)
2945 {
2946         struct compound_hdr hdr = {
2947                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2948         };
2949
2950         encode_compound_hdr(xdr, req, &hdr);
2951         encode_sequence(xdr, &args->seq_args, &hdr);
2952         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2953         encode_layoutget(xdr, args, &hdr);
2954
2955         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2956             args->layout.pages, 0, args->layout.pglen);
2957
2958         encode_nops(&hdr);
2959 }
2960
2961 /*
2962  *  Encode LAYOUTCOMMIT request
2963  */
2964 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2965                                       struct xdr_stream *xdr,
2966                                       struct nfs4_layoutcommit_args *args)
2967 {
2968         struct nfs4_layoutcommit_data *data =
2969                 container_of(args, struct nfs4_layoutcommit_data, args);
2970         struct compound_hdr hdr = {
2971                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2972         };
2973
2974         encode_compound_hdr(xdr, req, &hdr);
2975         encode_sequence(xdr, &args->seq_args, &hdr);
2976         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2977         encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2978         encode_getfattr(xdr, args->bitmask, &hdr);
2979         encode_nops(&hdr);
2980 }
2981
2982 /*
2983  * Encode LAYOUTRETURN request
2984  */
2985 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2986                                       struct xdr_stream *xdr,
2987                                       struct nfs4_layoutreturn_args *args)
2988 {
2989         struct compound_hdr hdr = {
2990                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2991         };
2992
2993         encode_compound_hdr(xdr, req, &hdr);
2994         encode_sequence(xdr, &args->seq_args, &hdr);
2995         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2996         encode_layoutreturn(xdr, args, &hdr);
2997         encode_nops(&hdr);
2998 }
2999
3000 /*
3001  * Encode SECINFO_NO_NAME request
3002  */
3003 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3004                                         struct xdr_stream *xdr,
3005                                         struct nfs41_secinfo_no_name_args *args)
3006 {
3007         struct compound_hdr hdr = {
3008                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3009         };
3010
3011         encode_compound_hdr(xdr, req, &hdr);
3012         encode_sequence(xdr, &args->seq_args, &hdr);
3013         encode_putrootfh(xdr, &hdr);
3014         encode_secinfo_no_name(xdr, args, &hdr);
3015         encode_nops(&hdr);
3016         return 0;
3017 }
3018
3019 /*
3020  *  Encode TEST_STATEID request
3021  */
3022 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3023                                       struct xdr_stream *xdr,
3024                                       struct nfs41_test_stateid_args *args)
3025 {
3026         struct compound_hdr hdr = {
3027                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3028         };
3029
3030         encode_compound_hdr(xdr, req, &hdr);
3031         encode_sequence(xdr, &args->seq_args, &hdr);
3032         encode_test_stateid(xdr, args, &hdr);
3033         encode_nops(&hdr);
3034 }
3035
3036 /*
3037  *  Encode FREE_STATEID request
3038  */
3039 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3040                                      struct xdr_stream *xdr,
3041                                      struct nfs41_free_stateid_args *args)
3042 {
3043         struct compound_hdr hdr = {
3044                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3045         };
3046
3047         encode_compound_hdr(xdr, req, &hdr);
3048         encode_sequence(xdr, &args->seq_args, &hdr);
3049         encode_free_stateid(xdr, args, &hdr);
3050         encode_nops(&hdr);
3051 }
3052 #endif /* CONFIG_NFS_V4_1 */
3053
3054 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3055 {
3056         dprintk("nfs: %s: prematurely hit end of receive buffer. "
3057                 "Remaining buffer length is %tu words.\n",
3058                 func, xdr->end - xdr->p);
3059 }
3060
3061 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3062 {
3063         __be32 *p;
3064
3065         p = xdr_inline_decode(xdr, 4);
3066         if (unlikely(!p))
3067                 goto out_overflow;
3068         *len = be32_to_cpup(p);
3069         p = xdr_inline_decode(xdr, *len);
3070         if (unlikely(!p))
3071                 goto out_overflow;
3072         *string = (char *)p;
3073         return 0;
3074 out_overflow:
3075         print_overflow_msg(__func__, xdr);
3076         return -EIO;
3077 }
3078
3079 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3080 {
3081         __be32 *p;
3082
3083         p = xdr_inline_decode(xdr, 8);
3084         if (unlikely(!p))
3085                 goto out_overflow;
3086         hdr->status = be32_to_cpup(p++);
3087         hdr->taglen = be32_to_cpup(p);
3088
3089         p = xdr_inline_decode(xdr, hdr->taglen + 4);
3090         if (unlikely(!p))
3091                 goto out_overflow;
3092         hdr->tag = (char *)p;
3093         p += XDR_QUADLEN(hdr->taglen);
3094         hdr->nops = be32_to_cpup(p);
3095         if (unlikely(hdr->nops < 1))
3096                 return nfs4_stat_to_errno(hdr->status);
3097         return 0;
3098 out_overflow:
3099         print_overflow_msg(__func__, xdr);
3100         return -EIO;
3101 }
3102
3103 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3104                 int *nfs_retval)
3105 {
3106         __be32 *p;
3107         uint32_t opnum;
3108         int32_t nfserr;
3109
3110         p = xdr_inline_decode(xdr, 8);
3111         if (unlikely(!p))
3112                 goto out_overflow;
3113         opnum = be32_to_cpup(p++);
3114         if (unlikely(opnum != expected))
3115                 goto out_bad_operation;
3116         nfserr = be32_to_cpup(p);
3117         if (nfserr == NFS_OK)
3118                 *nfs_retval = 0;
3119         else
3120                 *nfs_retval = nfs4_stat_to_errno(nfserr);
3121         return true;
3122 out_bad_operation:
3123         dprintk("nfs: Server returned operation"
3124                 " %d but we issued a request for %d\n",
3125                         opnum, expected);
3126         *nfs_retval = -EREMOTEIO;
3127         return false;
3128 out_overflow:
3129         print_overflow_msg(__func__, xdr);
3130         *nfs_retval = -EIO;
3131         return false;
3132 }
3133
3134 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3135 {
3136         int retval;
3137
3138         __decode_op_hdr(xdr, expected, &retval);
3139         return retval;
3140 }
3141
3142 /* Dummy routine */
3143 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3144 {
3145         __be32 *p;
3146         unsigned int strlen;
3147         char *str;
3148
3149         p = xdr_inline_decode(xdr, 12);
3150         if (likely(p))
3151                 return decode_opaque_inline(xdr, &strlen, &str);
3152         print_overflow_msg(__func__, xdr);
3153         return -EIO;
3154 }
3155
3156 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3157 {
3158         uint32_t bmlen;
3159         __be32 *p;
3160
3161         p = xdr_inline_decode(xdr, 4);
3162         if (unlikely(!p))
3163                 goto out_overflow;
3164         bmlen = be32_to_cpup(p);
3165
3166         bitmap[0] = bitmap[1] = bitmap[2] = 0;
3167         p = xdr_inline_decode(xdr, (bmlen << 2));
3168         if (unlikely(!p))
3169                 goto out_overflow;
3170         if (bmlen > 0) {
3171                 bitmap[0] = be32_to_cpup(p++);
3172                 if (bmlen > 1) {
3173                         bitmap[1] = be32_to_cpup(p++);
3174                         if (bmlen > 2)
3175                                 bitmap[2] = be32_to_cpup(p);
3176                 }
3177         }
3178         return 0;
3179 out_overflow:
3180         print_overflow_msg(__func__, xdr);
3181         return -EIO;
3182 }
3183
3184 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3185 {
3186         __be32 *p;
3187
3188         p = xdr_inline_decode(xdr, 4);
3189         if (unlikely(!p))
3190                 goto out_overflow;
3191         *attrlen = be32_to_cpup(p);
3192         *savep = xdr_stream_pos(xdr);
3193         return 0;
3194 out_overflow:
3195         print_overflow_msg(__func__, xdr);
3196         return -EIO;
3197 }
3198
3199 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3200 {
3201         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3202                 int ret;
3203                 ret = decode_attr_bitmap(xdr, bitmask);
3204                 if (unlikely(ret < 0))
3205                         return ret;
3206                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3207         } else
3208                 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3209         dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3210                 bitmask[0], bitmask[1], bitmask[2]);
3211         return 0;
3212 }
3213
3214 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3215 {
3216         __be32 *p;
3217         int ret = 0;
3218
3219         *type = 0;
3220         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3221                 return -EIO;
3222         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3223                 p = xdr_inline_decode(xdr, 4);
3224                 if (unlikely(!p))
3225                         goto out_overflow;
3226                 *type = be32_to_cpup(p);
3227                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3228                         dprintk("%s: bad type %d\n", __func__, *type);
3229                         return -EIO;
3230                 }
3231                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3232                 ret = NFS_ATTR_FATTR_TYPE;
3233         }
3234         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3235         return ret;
3236 out_overflow:
3237         print_overflow_msg(__func__, xdr);
3238         return -EIO;
3239 }
3240
3241 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3242                                       uint32_t *bitmap, uint32_t *type)
3243 {
3244         __be32 *p;
3245
3246         *type = 0;
3247         if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3248                 return -EIO;
3249         if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3250                 p = xdr_inline_decode(xdr, 4);
3251                 if (unlikely(!p))
3252                         goto out_overflow;
3253                 *type = be32_to_cpup(p);
3254                 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3255         }
3256         dprintk("%s: expire type=0x%x\n", __func__, *type);
3257         return 0;
3258 out_overflow:
3259         print_overflow_msg(__func__, xdr);
3260         return -EIO;
3261 }
3262
3263 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3264 {
3265         __be32 *p;
3266         int ret = 0;
3267
3268         *change = 0;
3269         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3270                 return -EIO;
3271         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3272                 p = xdr_inline_decode(xdr, 8);
3273                 if (unlikely(!p))
3274                         goto out_overflow;
3275                 xdr_decode_hyper(p, change);
3276                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3277                 ret = NFS_ATTR_FATTR_CHANGE;
3278         }
3279         dprintk("%s: change attribute=%Lu\n", __func__,
3280                         (unsigned long long)*change);
3281         return ret;
3282 out_overflow:
3283         print_overflow_msg(__func__, xdr);
3284         return -EIO;
3285 }
3286
3287 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3288 {
3289         __be32 *p;
3290         int ret = 0;
3291
3292         *size = 0;
3293         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3294                 return -EIO;
3295         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3296                 p = xdr_inline_decode(xdr, 8);
3297                 if (unlikely(!p))
3298                         goto out_overflow;
3299                 xdr_decode_hyper(p, size);
3300                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3301                 ret = NFS_ATTR_FATTR_SIZE;
3302         }
3303         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3304         return ret;
3305 out_overflow:
3306         print_overflow_msg(__func__, xdr);
3307         return -EIO;
3308 }
3309
3310 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3311 {
3312         __be32 *p;
3313
3314         *res = 0;
3315         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3316                 return -EIO;
3317         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3318                 p = xdr_inline_decode(xdr, 4);
3319                 if (unlikely(!p))
3320                         goto out_overflow;
3321                 *res = be32_to_cpup(p);
3322                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3323         }
3324         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3325         return 0;
3326 out_overflow:
3327         print_overflow_msg(__func__, xdr);
3328         return -EIO;
3329 }
3330
3331 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3332 {
3333         __be32 *p;
3334
3335         *res = 0;
3336         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3337                 return -EIO;
3338         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3339                 p = xdr_inline_decode(xdr, 4);
3340                 if (unlikely(!p))
3341                         goto out_overflow;
3342                 *res = be32_to_cpup(p);
3343                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3344         }
3345         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3346         return 0;
3347 out_overflow:
3348         print_overflow_msg(__func__, xdr);
3349         return -EIO;
3350 }
3351
3352 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3353 {
3354         __be32 *p;
3355         int ret = 0;
3356
3357         fsid->major = 0;
3358         fsid->minor = 0;
3359         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3360                 return -EIO;
3361         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3362                 p = xdr_inline_decode(xdr, 16);
3363                 if (unlikely(!p))
3364                         goto out_overflow;
3365                 p = xdr_decode_hyper(p, &fsid->major);
3366                 xdr_decode_hyper(p, &fsid->minor);
3367                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3368                 ret = NFS_ATTR_FATTR_FSID;
3369         }
3370         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3371                         (unsigned long long)fsid->major,
3372                         (unsigned long long)fsid->minor);
3373         return ret;
3374 out_overflow:
3375         print_overflow_msg(__func__, xdr);
3376         return -EIO;
3377 }
3378
3379 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3380 {
3381         __be32 *p;
3382
3383         *res = 60;
3384         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3385                 return -EIO;
3386         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3387                 p = xdr_inline_decode(xdr, 4);
3388                 if (unlikely(!p))
3389                         goto out_overflow;
3390                 *res = be32_to_cpup(p);
3391                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3392         }
3393         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3394         return 0;
3395 out_overflow:
3396         print_overflow_msg(__func__, xdr);
3397         return -EIO;
3398 }
3399
3400 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3401 {
3402         __be32 *p;
3403
3404         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3405                 return -EIO;
3406         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3407                 p = xdr_inline_decode(xdr, 4);
3408                 if (unlikely(!p))
3409                         goto out_overflow;
3410                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3411                 *res = -be32_to_cpup(p);
3412         }
3413         return 0;
3414 out_overflow:
3415         print_overflow_msg(__func__, xdr);
3416         return -EIO;
3417 }
3418
3419 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3420 {
3421         __be32 *p;
3422         int len;
3423
3424         if (fh != NULL)
3425                 memset(fh, 0, sizeof(*fh));
3426
3427         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3428                 return -EIO;
3429         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3430                 p = xdr_inline_decode(xdr, 4);
3431                 if (unlikely(!p))
3432                         goto out_overflow;
3433                 len = be32_to_cpup(p);
3434                 if (len > NFS4_FHSIZE)
3435                         return -EIO;
3436                 p = xdr_inline_decode(xdr, len);
3437                 if (unlikely(!p))
3438                         goto out_overflow;
3439                 if (fh != NULL) {
3440                         memcpy(fh->data, p, len);
3441                         fh->size = len;
3442                 }
3443                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3444         }
3445         return 0;
3446 out_overflow:
3447         print_overflow_msg(__func__, xdr);
3448         return -EIO;
3449 }
3450
3451 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3452 {
3453         __be32 *p;
3454
3455         *res = 0;
3456         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3457                 return -EIO;
3458         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3459                 p = xdr_inline_decode(xdr, 4);
3460                 if (unlikely(!p))
3461                         goto out_overflow;
3462                 *res = be32_to_cpup(p);
3463                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3464         }
3465         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3466         return 0;
3467 out_overflow:
3468         print_overflow_msg(__func__, xdr);
3469         return -EIO;
3470 }
3471
3472 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3473 {
3474         __be32 *p;
3475         int ret = 0;
3476
3477         *fileid = 0;
3478         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3479                 return -EIO;
3480         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3481                 p = xdr_inline_decode(xdr, 8);
3482                 if (unlikely(!p))
3483                         goto out_overflow;
3484                 xdr_decode_hyper(p, fileid);
3485                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3486                 ret = NFS_ATTR_FATTR_FILEID;
3487         }
3488         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3489         return ret;
3490 out_overflow:
3491         print_overflow_msg(__func__, xdr);
3492         return -EIO;
3493 }
3494
3495 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3496 {
3497         __be32 *p;
3498         int ret = 0;
3499
3500         *fileid = 0;
3501         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3502                 return -EIO;
3503         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3504                 p = xdr_inline_decode(xdr, 8);
3505                 if (unlikely(!p))
3506                         goto out_overflow;
3507                 xdr_decode_hyper(p, fileid);
3508                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3509                 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3510         }
3511         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3512         return ret;
3513 out_overflow:
3514         print_overflow_msg(__func__, xdr);
3515         return -EIO;
3516 }
3517
3518 static int decode_attr_files_avail(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_AVAIL - 1U)))
3525                 return -EIO;
3526         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
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_AVAIL;
3532         }
3533         dprintk("%s: files avail=%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_free(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_FREE - 1U)))
3547                 return -EIO;
3548         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
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_FREE;
3554         }
3555         dprintk("%s: files free=%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_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3563 {
3564         __be32 *p;
3565         int status = 0;
3566
3567         *res = 0;
3568         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3569                 return -EIO;
3570         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3571                 p = xdr_inline_decode(xdr, 8);
3572                 if (unlikely(!p))
3573                         goto out_overflow;
3574                 xdr_decode_hyper(p, res);
3575                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3576         }
3577         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3578         return status;
3579 out_overflow:
3580         print_overflow_msg(__func__, xdr);
3581         return -EIO;
3582 }
3583
3584 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3585 {
3586         u32 n;
3587         __be32 *p;
3588         int status = 0;
3589
3590         p = xdr_inline_decode(xdr, 4);
3591         if (unlikely(!p))
3592                 goto out_overflow;
3593         n = be32_to_cpup(p);
3594         if (n == 0)
3595                 goto root_path;
3596         dprintk("pathname4: ");
3597         if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3598                 dprintk("cannot parse %d components in path\n", n);
3599                 goto out_eio;
3600         }
3601         for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3602                 struct nfs4_string *component = &path->components[path->ncomponents];
3603                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3604                 if (unlikely(status != 0))
3605                         goto out_eio;
3606                 ifdebug (XDR)
3607                         pr_cont("%s%.*s ",
3608                                 (path->ncomponents != n ? "/ " : ""),
3609                                 component->len, component->data);
3610         }
3611 out:
3612         return status;
3613 root_path:
3614 /* a root pathname is sent as a zero component4 */
3615         path->ncomponents = 1;
3616         path->components[0].len=0;
3617         path->components[0].data=NULL;
3618         dprintk("pathname4: /\n");
3619         goto out;
3620 out_eio:
3621         dprintk(" status %d", status);
3622         status = -EIO;
3623         goto out;
3624 out_overflow:
3625         print_overflow_msg(__func__, xdr);
3626         return -EIO;
3627 }
3628
3629 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3630 {
3631         int n;
3632         __be32 *p;
3633         int status = -EIO;
3634
3635         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3636                 goto out;
3637         status = 0;
3638         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3639                 goto out;
3640         status = -EIO;
3641         /* Ignore borken servers that return unrequested attrs */
3642         if (unlikely(res == NULL))
3643                 goto out;
3644         dprintk("%s: fsroot:\n", __func__);
3645         status = decode_pathname(xdr, &res->fs_path);
3646         if (unlikely(status != 0))
3647                 goto out;
3648         p = xdr_inline_decode(xdr, 4);
3649         if (unlikely(!p))
3650                 goto out_overflow;
3651         n = be32_to_cpup(p);
3652         if (n <= 0)
3653                 goto out_eio;
3654         for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3655                 u32 m;
3656                 struct nfs4_fs_location *loc;
3657
3658                 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3659                         break;
3660                 loc = &res->locations[res->nlocations];
3661                 p = xdr_inline_decode(xdr, 4);
3662                 if (unlikely(!p))
3663                         goto out_overflow;
3664                 m = be32_to_cpup(p);
3665
3666                 dprintk("%s: servers:\n", __func__);
3667                 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3668                         struct nfs4_string *server;
3669
3670                         if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3671                                 unsigned int i;
3672                                 dprintk("%s: using first %u of %u servers "
3673                                         "returned for location %u\n",
3674                                                 __func__,
3675                                                 NFS4_FS_LOCATION_MAXSERVERS,
3676                                                 m, res->nlocations);
3677                                 for (i = loc->nservers; i < m; i++) {
3678                                         unsigned int len;
3679                                         char *data;
3680                                         status = decode_opaque_inline(xdr, &len, &data);
3681                                         if (unlikely(status != 0))
3682                                                 goto out_eio;
3683                                 }
3684                                 break;
3685                         }
3686                         server = &loc->servers[loc->nservers];
3687                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3688                         if (unlikely(status != 0))
3689                                 goto out_eio;
3690                         dprintk("%s ", server->data);
3691                 }
3692                 status = decode_pathname(xdr, &loc->rootpath);
3693                 if (unlikely(status != 0))
3694                         goto out_eio;
3695         }
3696         if (res->nlocations != 0)
3697                 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3698 out:
3699         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3700         return status;
3701 out_overflow:
3702         print_overflow_msg(__func__, xdr);
3703 out_eio:
3704         status = -EIO;
3705         goto out;
3706 }
3707
3708 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3709 {
3710         __be32 *p;
3711         int status = 0;
3712
3713         *res = 0;
3714         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3715                 return -EIO;
3716         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3717                 p = xdr_inline_decode(xdr, 8);
3718                 if (unlikely(!p))
3719                         goto out_overflow;
3720                 xdr_decode_hyper(p, res);
3721                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3722         }
3723         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3724         return status;
3725 out_overflow:
3726         print_overflow_msg(__func__, xdr);
3727         return -EIO;
3728 }
3729
3730 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3731 {
3732         __be32 *p;
3733         int status = 0;
3734
3735         *maxlink = 1;
3736         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3737                 return -EIO;
3738         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3739                 p = xdr_inline_decode(xdr, 4);
3740                 if (unlikely(!p))
3741                         goto out_overflow;
3742                 *maxlink = be32_to_cpup(p);
3743                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3744         }
3745         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3746         return status;
3747 out_overflow:
3748         print_overflow_msg(__func__, xdr);
3749         return -EIO;
3750 }
3751
3752 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3753 {
3754         __be32 *p;
3755         int status = 0;
3756
3757         *maxname = 1024;
3758         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3759                 return -EIO;
3760         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3761                 p = xdr_inline_decode(xdr, 4);
3762                 if (unlikely(!p))
3763                         goto out_overflow;
3764                 *maxname = be32_to_cpup(p);
3765                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3766         }
3767         dprintk("%s: maxname=%u\n", __func__, *maxname);
3768         return status;
3769 out_overflow:
3770         print_overflow_msg(__func__, xdr);
3771         return -EIO;
3772 }
3773
3774 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3775 {
3776         __be32 *p;
3777         int status = 0;
3778
3779         *res = 1024;
3780         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3781                 return -EIO;
3782         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3783                 uint64_t maxread;
3784                 p = xdr_inline_decode(xdr, 8);
3785                 if (unlikely(!p))
3786                         goto out_overflow;
3787                 xdr_decode_hyper(p, &maxread);
3788                 if (maxread > 0x7FFFFFFF)
3789                         maxread = 0x7FFFFFFF;
3790                 *res = (uint32_t)maxread;
3791                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3792         }
3793         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3794         return status;
3795 out_overflow:
3796         print_overflow_msg(__func__, xdr);
3797         return -EIO;
3798 }
3799
3800 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3801 {
3802         __be32 *p;
3803         int status = 0;
3804
3805         *res = 1024;
3806         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3807                 return -EIO;
3808         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3809                 uint64_t maxwrite;
3810                 p = xdr_inline_decode(xdr, 8);
3811                 if (unlikely(!p))
3812                         goto out_overflow;
3813                 xdr_decode_hyper(p, &maxwrite);
3814                 if (maxwrite > 0x7FFFFFFF)
3815                         maxwrite = 0x7FFFFFFF;
3816                 *res = (uint32_t)maxwrite;
3817                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3818         }
3819         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3820         return status;
3821 out_overflow:
3822         print_overflow_msg(__func__, xdr);
3823         return -EIO;
3824 }
3825
3826 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3827 {
3828         uint32_t tmp;
3829         __be32 *p;
3830         int ret = 0;
3831
3832         *mode = 0;
3833         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3834                 return -EIO;
3835         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3836                 p = xdr_inline_decode(xdr, 4);
3837                 if (unlikely(!p))
3838                         goto out_overflow;
3839                 tmp = be32_to_cpup(p);
3840                 *mode = tmp & ~S_IFMT;
3841                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3842                 ret = NFS_ATTR_FATTR_MODE;
3843         }
3844         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3845         return ret;
3846 out_overflow:
3847         print_overflow_msg(__func__, xdr);
3848         return -EIO;
3849 }
3850
3851 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3852 {
3853         __be32 *p;
3854         int ret = 0;
3855
3856         *nlink = 1;
3857         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3858                 return -EIO;
3859         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3860                 p = xdr_inline_decode(xdr, 4);
3861                 if (unlikely(!p))
3862                         goto out_overflow;
3863                 *nlink = be32_to_cpup(p);
3864                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3865                 ret = NFS_ATTR_FATTR_NLINK;
3866         }
3867         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3868         return ret;
3869 out_overflow:
3870         print_overflow_msg(__func__, xdr);
3871         return -EIO;
3872 }
3873
3874 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3875                 const struct nfs_server *server, kuid_t *uid,
3876                 struct nfs4_string *owner_name)
3877 {
3878         uint32_t len;
3879         __be32 *p;
3880         int ret = 0;
3881
3882         *uid = make_kuid(&init_user_ns, -2);
3883         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3884                 return -EIO;
3885         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3886                 p = xdr_inline_decode(xdr, 4);
3887                 if (unlikely(!p))
3888                         goto out_overflow;
3889                 len = be32_to_cpup(p);
3890                 p = xdr_inline_decode(xdr, len);
3891                 if (unlikely(!p))
3892                         goto out_overflow;
3893                 if (owner_name != NULL) {
3894                         owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3895                         if (owner_name->data != NULL) {
3896                                 owner_name->len = len;
3897                                 ret = NFS_ATTR_FATTR_OWNER_NAME;
3898                         }
3899                 } else if (len < XDR_MAX_NETOBJ) {
3900                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3901                                 ret = NFS_ATTR_FATTR_OWNER;
3902                         else
3903                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3904                                                 __func__);
3905                 } else
3906                         dprintk("%s: name too long (%u)!\n",
3907                                         __func__, len);
3908                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3909         }
3910         dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3911         return ret;
3912 out_overflow:
3913         print_overflow_msg(__func__, xdr);
3914         return -EIO;
3915 }
3916
3917 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3918                 const struct nfs_server *server, kgid_t *gid,
3919                 struct nfs4_string *group_name)
3920 {
3921         uint32_t len;
3922         __be32 *p;
3923         int ret = 0;
3924
3925         *gid = make_kgid(&init_user_ns, -2);
3926         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3927                 return -EIO;
3928         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3929                 p = xdr_inline_decode(xdr, 4);
3930                 if (unlikely(!p))
3931                         goto out_overflow;
3932                 len = be32_to_cpup(p);
3933                 p = xdr_inline_decode(xdr, len);
3934                 if (unlikely(!p))
3935                         goto out_overflow;
3936                 if (group_name != NULL) {
3937                         group_name->data = kmemdup(p, len, GFP_NOWAIT);
3938                         if (group_name->data != NULL) {
3939                                 group_name->len = len;
3940                                 ret = NFS_ATTR_FATTR_GROUP_NAME;
3941                         }
3942                 } else if (len < XDR_MAX_NETOBJ) {
3943                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3944                                 ret = NFS_ATTR_FATTR_GROUP;
3945                         else
3946                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3947                                                 __func__);
3948                 } else
3949                         dprintk("%s: name too long (%u)!\n",
3950                                         __func__, len);
3951                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3952         }
3953         dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3954         return ret;
3955 out_overflow:
3956         print_overflow_msg(__func__, xdr);
3957         return -EIO;
3958 }
3959
3960 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3961 {
3962         uint32_t major = 0, minor = 0;
3963         __be32 *p;
3964         int ret = 0;
3965
3966         *rdev = MKDEV(0,0);
3967         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3968                 return -EIO;
3969         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3970                 dev_t tmp;
3971
3972                 p = xdr_inline_decode(xdr, 8);
3973                 if (unlikely(!p))
3974                         goto out_overflow;
3975                 major = be32_to_cpup(p++);
3976                 minor = be32_to_cpup(p);
3977                 tmp = MKDEV(major, minor);
3978                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3979                         *rdev = tmp;
3980                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3981                 ret = NFS_ATTR_FATTR_RDEV;
3982         }
3983         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3984         return ret;
3985 out_overflow:
3986         print_overflow_msg(__func__, xdr);
3987         return -EIO;
3988 }
3989
3990 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3991 {
3992         __be32 *p;
3993         int status = 0;
3994
3995         *res = 0;
3996         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3997                 return -EIO;
3998         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3999                 p = xdr_inline_decode(xdr, 8);
4000                 if (unlikely(!p))
4001                         goto out_overflow;
4002                 xdr_decode_hyper(p, res);
4003                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4004         }
4005         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4006         return status;
4007 out_overflow:
4008         print_overflow_msg(__func__, xdr);
4009         return -EIO;
4010 }
4011
4012 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4013 {
4014         __be32 *p;
4015         int status = 0;
4016
4017         *res = 0;
4018         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4019                 return -EIO;
4020         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4021                 p = xdr_inline_decode(xdr, 8);
4022                 if (unlikely(!p))
4023                         goto out_overflow;
4024                 xdr_decode_hyper(p, res);
4025                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4026         }
4027         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4028         return status;
4029 out_overflow:
4030         print_overflow_msg(__func__, xdr);
4031         return -EIO;
4032 }
4033
4034 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4035 {
4036         __be32 *p;
4037         int status = 0;
4038
4039         *res = 0;
4040         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4041                 return -EIO;
4042         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4043                 p = xdr_inline_decode(xdr, 8);
4044                 if (unlikely(!p))
4045                         goto out_overflow;
4046                 xdr_decode_hyper(p, res);
4047                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4048         }
4049         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4050         return status;
4051 out_overflow:
4052         print_overflow_msg(__func__, xdr);
4053         return -EIO;
4054 }
4055
4056 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4057 {
4058         __be32 *p;
4059         int ret = 0;
4060
4061         *used = 0;
4062         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4063                 return -EIO;
4064         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4065                 p = xdr_inline_decode(xdr, 8);
4066                 if (unlikely(!p))
4067                         goto out_overflow;
4068                 xdr_decode_hyper(p, used);
4069                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4070                 ret = NFS_ATTR_FATTR_SPACE_USED;
4071         }
4072         dprintk("%s: space used=%Lu\n", __func__,
4073                         (unsigned long long)*used);
4074         return ret;
4075 out_overflow:
4076         print_overflow_msg(__func__, xdr);
4077         return -EIO;
4078 }
4079
4080 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4081 {
4082         __be32 *p;
4083         uint64_t sec;
4084         uint32_t nsec;
4085
4086         p = xdr_inline_decode(xdr, 12);
4087         if (unlikely(!p))
4088                 goto out_overflow;
4089         p = xdr_decode_hyper(p, &sec);
4090         nsec = be32_to_cpup(p);
4091         time->tv_sec = (time_t)sec;
4092         time->tv_nsec = (long)nsec;
4093         return 0;
4094 out_overflow:
4095         print_overflow_msg(__func__, xdr);
4096         return -EIO;
4097 }
4098
4099 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4100 {
4101         int status = 0;
4102
4103         time->tv_sec = 0;
4104         time->tv_nsec = 0;
4105         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4106                 return -EIO;
4107         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4108                 status = decode_attr_time(xdr, time);
4109                 if (status == 0)
4110                         status = NFS_ATTR_FATTR_ATIME;
4111                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4112         }
4113         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4114         return status;
4115 }
4116
4117 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4118 {
4119         int status = 0;
4120
4121         time->tv_sec = 0;
4122         time->tv_nsec = 0;
4123         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4124                 return -EIO;
4125         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4126                 status = decode_attr_time(xdr, time);
4127                 if (status == 0)
4128                         status = NFS_ATTR_FATTR_CTIME;
4129                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4130         }
4131         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4132         return status;
4133 }
4134
4135 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4136                                   struct timespec *time)
4137 {
4138         int status = 0;
4139
4140         time->tv_sec = 0;
4141         time->tv_nsec = 0;
4142         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4143                 return -EIO;
4144         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4145                 status = decode_attr_time(xdr, time);
4146                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4147         }
4148         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4149                 (long)time->tv_nsec);
4150         return status;
4151 }
4152
4153 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4154                                         struct nfs4_label *label)
4155 {
4156         uint32_t pi = 0;
4157         uint32_t lfs = 0;
4158         __u32 len;
4159         __be32 *p;
4160         int status = 0;
4161
4162         if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4163                 return -EIO;
4164         if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4165                 p = xdr_inline_decode(xdr, 4);
4166                 if (unlikely(!p))
4167                         goto out_overflow;
4168                 lfs = be32_to_cpup(p++);
4169                 p = xdr_inline_decode(xdr, 4);
4170                 if (unlikely(!p))
4171                         goto out_overflow;
4172                 pi = be32_to_cpup(p++);
4173                 p = xdr_inline_decode(xdr, 4);
4174                 if (unlikely(!p))
4175                         goto out_overflow;
4176                 len = be32_to_cpup(p++);
4177                 p = xdr_inline_decode(xdr, len);
4178                 if (unlikely(!p))
4179                         goto out_overflow;
4180                 if (len < NFS4_MAXLABELLEN) {
4181                         if (label) {
4182                                 memcpy(label->label, p, len);
4183                                 label->len = len;
4184                                 label->pi = pi;
4185                                 label->lfs = lfs;
4186                                 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4187                         }
4188                         bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4189                 } else
4190                         printk(KERN_WARNING "%s: label too long (%u)!\n",
4191                                         __func__, len);
4192         }
4193         if (label && label->label)
4194                 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4195                         (char *)label->label, label->len, label->pi, label->lfs);
4196         return status;
4197
4198 out_overflow:
4199         print_overflow_msg(__func__, xdr);
4200         return -EIO;
4201 }
4202
4203 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4204 {
4205         int status = 0;
4206
4207         time->tv_sec = 0;
4208         time->tv_nsec = 0;
4209         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4210                 return -EIO;
4211         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4212                 status = decode_attr_time(xdr, time);
4213                 if (status == 0)
4214                         status = NFS_ATTR_FATTR_MTIME;
4215                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4216         }
4217         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4218         return status;
4219 }
4220
4221 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4222 {
4223         unsigned int attrwords = XDR_QUADLEN(attrlen);
4224         unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4225
4226         if (unlikely(attrwords != nwords)) {
4227                 dprintk("%s: server returned incorrect attribute length: "
4228                         "%u %c %u\n",
4229                                 __func__,
4230                                 attrwords << 2,
4231                                 (attrwords < nwords) ? '<' : '>',
4232                                 nwords << 2);
4233                 return -EIO;
4234         }
4235         return 0;
4236 }
4237
4238 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4239 {
4240         __be32 *p;
4241
4242         p = xdr_inline_decode(xdr, 20);
4243         if (unlikely(!p))
4244                 goto out_overflow;
4245         cinfo->atomic = be32_to_cpup(p++);
4246         p = xdr_decode_hyper(p, &cinfo->before);
4247         xdr_decode_hyper(p, &cinfo->after);
4248         return 0;
4249 out_overflow:
4250         print_overflow_msg(__func__, xdr);
4251         return -EIO;
4252 }
4253
4254 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4255 {
4256         __be32 *p;
4257         uint32_t supp, acc;
4258         int status;
4259
4260         status = decode_op_hdr(xdr, OP_ACCESS);
4261         if (status)
4262                 return status;
4263         p = xdr_inline_decode(xdr, 8);
4264         if (unlikely(!p))
4265                 goto out_overflow;
4266         supp = be32_to_cpup(p++);
4267         acc = be32_to_cpup(p);
4268         *supported = supp;
4269         *access = acc;
4270         return 0;
4271 out_overflow:
4272         print_overflow_msg(__func__, xdr);
4273         return -EIO;
4274 }
4275
4276 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4277 {
4278         __be32 *p;
4279
4280         p = xdr_inline_decode(xdr, len);
4281         if (likely(p)) {
4282                 memcpy(buf, p, len);
4283                 return 0;
4284         }
4285         print_overflow_msg(__func__, xdr);
4286         return -EIO;
4287 }
4288
4289 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4290 {
4291         return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4292 }
4293
4294 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4295 {
4296         int status;
4297
4298         status = decode_op_hdr(xdr, OP_CLOSE);
4299         if (status != -EIO)
4300                 nfs_increment_open_seqid(status, res->seqid);
4301         if (!status)
4302                 status = decode_stateid(xdr, &res->stateid);
4303         return status;
4304 }
4305
4306 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4307 {
4308         return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4309 }
4310
4311 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4312 {
4313         return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4314 }
4315
4316 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4317 {
4318         int status;
4319
4320         status = decode_op_hdr(xdr, OP_COMMIT);
4321         if (!status)
4322                 status = decode_write_verifier(xdr, &res->verf->verifier);
4323         return status;
4324 }
4325
4326 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4327 {
4328         __be32 *p;
4329         uint32_t bmlen;
4330         int status;
4331
4332         status = decode_op_hdr(xdr, OP_CREATE);
4333         if (status)
4334                 return status;
4335         if ((status = decode_change_info(xdr, cinfo)))
4336                 return status;
4337         p = xdr_inline_decode(xdr, 4);
4338         if (unlikely(!p))
4339                 goto out_overflow;
4340         bmlen = be32_to_cpup(p);
4341         p = xdr_inline_decode(xdr, bmlen << 2);
4342         if (likely(p))
4343                 return 0;
4344 out_overflow:
4345         print_overflow_msg(__func__, xdr);
4346         return -EIO;
4347 }
4348
4349 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4350 {
4351         unsigned int savep;
4352         uint32_t attrlen, bitmap[3] = {0};
4353         int status;
4354
4355         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4356                 goto xdr_error;
4357         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4358                 goto xdr_error;
4359         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4360                 goto xdr_error;
4361         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4362                 goto xdr_error;
4363         if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4364                                                  &res->fh_expire_type)) != 0)
4365                 goto xdr_error;
4366         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4367                 goto xdr_error;
4368         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4369                 goto xdr_error;
4370         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4371                 goto xdr_error;
4372         status = verify_attr_len(xdr, savep, attrlen);
4373 xdr_error:
4374         dprintk("%s: xdr returned %d!\n", __func__, -status);
4375         return status;
4376 }
4377
4378 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4379 {
4380         unsigned int savep;
4381         uint32_t attrlen, bitmap[3] = {0};
4382         int status;
4383
4384         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4385                 goto xdr_error;
4386         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4387                 goto xdr_error;
4388         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4389                 goto xdr_error;
4390
4391         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4392                 goto xdr_error;
4393         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4394                 goto xdr_error;
4395         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4396                 goto xdr_error;
4397         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4398                 goto xdr_error;
4399         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4400                 goto xdr_error;
4401         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4402                 goto xdr_error;
4403
4404         status = verify_attr_len(xdr, savep, attrlen);
4405 xdr_error:
4406         dprintk("%s: xdr returned %d!\n", __func__, -status);
4407         return status;
4408 }
4409
4410 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4411 {
4412         unsigned int savep;
4413         uint32_t attrlen, bitmap[3] = {0};
4414         int status;
4415
4416         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4417                 goto xdr_error;
4418         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4419                 goto xdr_error;
4420         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4421                 goto xdr_error;
4422
4423         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4424                 goto xdr_error;
4425         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4426                 goto xdr_error;
4427
4428         status = verify_attr_len(xdr, savep, attrlen);
4429 xdr_error:
4430         dprintk("%s: xdr returned %d!\n", __func__, -status);
4431         return status;
4432 }
4433
4434 static int decode_threshold_hint(struct xdr_stream *xdr,
4435                                   uint32_t *bitmap,
4436                                   uint64_t *res,
4437                                   uint32_t hint_bit)
4438 {
4439         __be32 *p;
4440
4441         *res = 0;
4442         if (likely(bitmap[0] & hint_bit)) {
4443                 p = xdr_inline_decode(xdr, 8);
4444                 if (unlikely(!p))
4445                         goto out_overflow;
4446                 xdr_decode_hyper(p, res);
4447         }
4448         return 0;
4449 out_overflow:
4450         print_overflow_msg(__func__, xdr);
4451         return -EIO;
4452 }
4453
4454 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4455                                         struct nfs4_threshold *res)
4456 {
4457         __be32 *p;
4458         unsigned int savep;
4459         uint32_t bitmap[3] = {0,}, attrlen;
4460         int status;
4461
4462         /* layout type */
4463         p = xdr_inline_decode(xdr, 4);
4464         if (unlikely(!p)) {
4465                 print_overflow_msg(__func__, xdr);
4466                 return -EIO;
4467         }
4468         res->l_type = be32_to_cpup(p);
4469
4470         /* thi_hintset bitmap */
4471         status = decode_attr_bitmap(xdr, bitmap);
4472         if (status < 0)
4473                 goto xdr_error;
4474
4475         /* thi_hintlist length */
4476         status = decode_attr_length(xdr, &attrlen, &savep);
4477         if (status < 0)
4478                 goto xdr_error;
4479         /* thi_hintlist */
4480         status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4481         if (status < 0)
4482                 goto xdr_error;
4483         status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4484         if (status < 0)
4485                 goto xdr_error;
4486         status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4487                                        THRESHOLD_RD_IO);
4488         if (status < 0)
4489                 goto xdr_error;
4490         status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4491                                        THRESHOLD_WR_IO);
4492         if (status < 0)
4493                 goto xdr_error;
4494
4495         status = verify_attr_len(xdr, savep, attrlen);
4496         res->bm = bitmap[0];
4497
4498         dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4499                  __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4500                 res->wr_io_sz);
4501 xdr_error:
4502         dprintk("%s ret=%d!\n", __func__, status);
4503         return status;
4504 }
4505
4506 /*
4507  * Thresholds on pNFS direct I/O vrs MDS I/O
4508  */
4509 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4510                                     uint32_t *bitmap,
4511                                     struct nfs4_threshold *res)
4512 {
4513         __be32 *p;
4514         int status = 0;
4515         uint32_t num;
4516
4517         if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4518                 return -EIO;
4519         if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4520                 /* Did the server return an unrequested attribute? */
4521                 if (unlikely(res == NULL))
4522                         return -EREMOTEIO;
4523                 p = xdr_inline_decode(xdr, 4);
4524                 if (unlikely(!p))
4525                         goto out_overflow;
4526                 num = be32_to_cpup(p);
4527                 if (num == 0)
4528                         return 0;
4529                 if (num > 1)
4530                         printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4531                                 "drivers per filesystem not supported\n",
4532                                 __func__);
4533
4534                 status = decode_first_threshold_item4(xdr, res);
4535                 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4536         }
4537         return status;
4538 out_overflow:
4539         print_overflow_msg(__func__, xdr);
4540         return -EIO;
4541 }
4542
4543 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4544                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4545                 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4546                 const struct nfs_server *server)
4547 {
4548         int status;
4549         umode_t fmode = 0;
4550         uint32_t type;
4551         int32_t err;
4552
4553         status = decode_attr_type(xdr, bitmap, &type);
4554         if (status < 0)
4555                 goto xdr_error;
4556         fattr->mode = 0;
4557         if (status != 0) {
4558                 fattr->mode |= nfs_type2fmt[type];
4559                 fattr->valid |= status;
4560         }
4561
4562         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4563         if (status < 0)
4564                 goto xdr_error;
4565         fattr->valid |= status;
4566
4567         status = decode_attr_size(xdr, bitmap, &fattr->size);
4568         if (status < 0)
4569                 goto xdr_error;
4570         fattr->valid |= status;
4571
4572         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4573         if (status < 0)
4574                 goto xdr_error;
4575         fattr->valid |= status;
4576
4577         err = 0;
4578         status = decode_attr_error(xdr, bitmap, &err);
4579         if (status < 0)
4580                 goto xdr_error;
4581
4582         status = decode_attr_filehandle(xdr, bitmap, fh);
4583         if (status < 0)
4584                 goto xdr_error;
4585
4586         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4587         if (status < 0)
4588                 goto xdr_error;
4589         fattr->valid |= status;
4590
4591         status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4592         if (status < 0)
4593                 goto xdr_error;
4594         fattr->valid |= status;
4595
4596         status = decode_attr_mode(xdr, bitmap, &fmode);
4597         if (status < 0)
4598                 goto xdr_error;
4599         if (status != 0) {
4600                 fattr->mode |= fmode;
4601                 fattr->valid |= status;
4602         }
4603
4604         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4605         if (status < 0)
4606                 goto xdr_error;
4607         fattr->valid |= status;
4608
4609         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4610         if (status < 0)
4611                 goto xdr_error;
4612         fattr->valid |= status;
4613
4614         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4615         if (status < 0)
4616                 goto xdr_error;
4617         fattr->valid |= status;
4618
4619         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4620         if (status < 0)
4621                 goto xdr_error;
4622         fattr->valid |= status;
4623
4624         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4625         if (status < 0)
4626                 goto xdr_error;
4627         fattr->valid |= status;
4628
4629         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4630         if (status < 0)
4631                 goto xdr_error;
4632         fattr->valid |= status;
4633
4634         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4635         if (status < 0)
4636                 goto xdr_error;
4637         fattr->valid |= status;
4638
4639         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4640         if (status < 0)
4641                 goto xdr_error;
4642         fattr->valid |= status;
4643
4644         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4645         if (status < 0)
4646                 goto xdr_error;
4647         fattr->valid |= status;
4648
4649         status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4650         if (status < 0)
4651                 goto xdr_error;
4652
4653         if (label) {
4654                 status = decode_attr_security_label(xdr, bitmap, label);
4655                 if (status < 0)
4656                         goto xdr_error;
4657                 fattr->valid |= status;
4658         }
4659
4660 xdr_error:
4661         dprintk("%s: xdr returned %d\n", __func__, -status);
4662         return status;
4663 }
4664
4665 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4666                 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4667                 struct nfs4_label *label, const struct nfs_server *server)
4668 {
4669         unsigned int savep;
4670         uint32_t attrlen,
4671                  bitmap[3] = {0};
4672         int status;
4673
4674         status = decode_op_hdr(xdr, OP_GETATTR);
4675         if (status < 0)
4676                 goto xdr_error;
4677
4678         status = decode_attr_bitmap(xdr, bitmap);
4679         if (status < 0)
4680                 goto xdr_error;
4681
4682         status = decode_attr_length(xdr, &attrlen, &savep);
4683         if (status < 0)
4684                 goto xdr_error;
4685
4686         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4687                                         label, server);
4688         if (status < 0)
4689                 goto xdr_error;
4690
4691         status = verify_attr_len(xdr, savep, attrlen);
4692 xdr_error:
4693         dprintk("%s: xdr returned %d\n", __func__, -status);
4694         return status;
4695 }
4696
4697 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4698                 struct nfs4_label *label, const struct nfs_server *server)
4699 {
4700         return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4701 }
4702
4703 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4704                 const struct nfs_server *server)
4705 {
4706         return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4707 }
4708
4709 /*
4710  * Decode potentially multiple layout types. Currently we only support
4711  * one layout driver per file system.
4712  */
4713 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4714                                          uint32_t *layouttype)
4715 {
4716         __be32 *p;
4717         int num;
4718
4719         p = xdr_inline_decode(xdr, 4);
4720         if (unlikely(!p))
4721                 goto out_overflow;
4722         num = be32_to_cpup(p);
4723
4724         /* pNFS is not supported by the underlying file system */
4725         if (num == 0) {
4726                 *layouttype = 0;
4727                 return 0;
4728         }
4729         if (num > 1)
4730                 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4731                         "drivers per filesystem not supported\n", __func__);
4732
4733         /* Decode and set first layout type, move xdr->p past unused types */
4734         p = xdr_inline_decode(xdr, num * 4);
4735         if (unlikely(!p))
4736                 goto out_overflow;
4737         *layouttype = be32_to_cpup(p);
4738         return 0;
4739 out_overflow:
4740         print_overflow_msg(__func__, xdr);
4741         return -EIO;
4742 }
4743
4744 /*
4745  * The type of file system exported.
4746  * Note we must ensure that layouttype is set in any non-error case.
4747  */
4748 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4749                                 uint32_t *layouttype)
4750 {
4751         int status = 0;
4752
4753         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4754         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4755                 return -EIO;
4756         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4757                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4758                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4759         } else
4760                 *layouttype = 0;
4761         return status;
4762 }
4763
4764 /*
4765  * The prefered block size for layout directed io
4766  */
4767 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4768                                       uint32_t *res)
4769 {
4770         __be32 *p;
4771
4772         dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4773         *res = 0;
4774         if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4775                 p = xdr_inline_decode(xdr, 4);
4776                 if (unlikely(!p)) {
4777                         print_overflow_msg(__func__, xdr);
4778                         return -EIO;
4779                 }
4780                 *res = be32_to_cpup(p);
4781                 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4782         }
4783         return 0;
4784 }
4785
4786 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4787 {
4788         unsigned int savep;
4789         uint32_t attrlen, bitmap[3];
4790         int status;
4791
4792         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4793                 goto xdr_error;
4794         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4795                 goto xdr_error;
4796         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4797                 goto xdr_error;
4798
4799         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4800
4801         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4802                 goto xdr_error;
4803         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4804                 goto xdr_error;
4805         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4806                 goto xdr_error;
4807         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4808         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4809                 goto xdr_error;
4810         fsinfo->wtpref = fsinfo->wtmax;
4811         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4812         if (status != 0)
4813                 goto xdr_error;
4814         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4815         if (status != 0)
4816                 goto xdr_error;
4817         status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4818         if (status)
4819                 goto xdr_error;
4820
4821         status = verify_attr_len(xdr, savep, attrlen);
4822 xdr_error:
4823         dprintk("%s: xdr returned %d!\n", __func__, -status);
4824         return status;
4825 }
4826
4827 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4828 {
4829         __be32 *p;
4830         uint32_t len;
4831         int status;
4832
4833         /* Zero handle first to allow comparisons */
4834         memset(fh, 0, sizeof(*fh));
4835
4836         status = decode_op_hdr(xdr, OP_GETFH);
4837         if (status)
4838                 return status;
4839
4840         p = xdr_inline_decode(xdr, 4);
4841         if (unlikely(!p))
4842                 goto out_overflow;
4843         len = be32_to_cpup(p);
4844         if (len > NFS4_FHSIZE)
4845                 return -EIO;
4846         fh->size = len;
4847         p = xdr_inline_decode(xdr, len);
4848         if (unlikely(!p))
4849                 goto out_overflow;
4850         memcpy(fh->data, p, len);
4851         return 0;
4852 out_overflow:
4853         print_overflow_msg(__func__, xdr);
4854         return -EIO;
4855 }
4856
4857 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4858 {
4859         int status;
4860
4861         status = decode_op_hdr(xdr, OP_LINK);
4862         if (status)
4863                 return status;
4864         return decode_change_info(xdr, cinfo);
4865 }
4866
4867 /*
4868  * We create the owner, so we know a proper owner.id length is 4.
4869  */
4870 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4871 {
4872         uint64_t offset, length, clientid;
4873         __be32 *p;
4874         uint32_t namelen, type;
4875
4876         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4877         if (unlikely(!p))
4878                 goto out_overflow;
4879         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4880         p = xdr_decode_hyper(p, &length);
4881         type = be32_to_cpup(p++); /* 4 byte read */
4882         if (fl != NULL) { /* manipulate file lock */
4883                 fl->fl_start = (loff_t)offset;
4884                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4885                 if (length == ~(uint64_t)0)
4886                         fl->fl_end = OFFSET_MAX;
4887                 fl->fl_type = F_WRLCK;
4888                 if (type & 1)
4889                         fl->fl_type = F_RDLCK;
4890                 fl->fl_pid = 0;
4891         }
4892         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4893         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4894         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4895         if (likely(p))
4896                 return -NFS4ERR_DENIED;
4897 out_overflow:
4898         print_overflow_msg(__func__, xdr);
4899         return -EIO;
4900 }
4901
4902 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4903 {
4904         int status;
4905
4906         status = decode_op_hdr(xdr, OP_LOCK);
4907         if (status == -EIO)
4908                 goto out;
4909         if (status == 0) {
4910                 status = decode_stateid(xdr, &res->stateid);
4911                 if (unlikely(status))
4912                         goto out;
4913         } else if (status == -NFS4ERR_DENIED)
4914                 status = decode_lock_denied(xdr, NULL);
4915         if (res->open_seqid != NULL)
4916                 nfs_increment_open_seqid(status, res->open_seqid);
4917         nfs_increment_lock_seqid(status, res->lock_seqid);
4918 out:
4919         return status;
4920 }
4921
4922 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4923 {
4924         int status;
4925         status = decode_op_hdr(xdr, OP_LOCKT);
4926         if (status == -NFS4ERR_DENIED)
4927                 return decode_lock_denied(xdr, res->denied);
4928         return status;
4929 }
4930
4931 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4932 {
4933         int status;
4934
4935         status = decode_op_hdr(xdr, OP_LOCKU);
4936         if (status != -EIO)
4937                 nfs_increment_lock_seqid(status, res->seqid);
4938         if (status == 0)
4939                 status = decode_stateid(xdr, &res->stateid);
4940         return status;
4941 }
4942
4943 static int decode_release_lockowner(struct xdr_stream *xdr)
4944 {
4945         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4946 }
4947
4948 static int decode_lookup(struct xdr_stream *xdr)
4949 {
4950         return decode_op_hdr(xdr, OP_LOOKUP);
4951 }
4952
4953 /* This is too sick! */
4954 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4955 {
4956         __be32 *p;
4957         uint32_t limit_type, nblocks, blocksize;
4958
4959         p = xdr_inline_decode(xdr, 12);
4960         if (unlikely(!p))
4961                 goto out_overflow;
4962         limit_type = be32_to_cpup(p++);
4963         switch (limit_type) {
4964         case 1:
4965                 xdr_decode_hyper(p, maxsize);
4966                 break;
4967         case 2:
4968                 nblocks = be32_to_cpup(p++);
4969                 blocksize = be32_to_cpup(p);
4970                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4971         }
4972         return 0;
4973 out_overflow:
4974         print_overflow_msg(__func__, xdr);
4975         return -EIO;
4976 }
4977
4978 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4979 {
4980         __be32 *p;
4981         uint32_t delegation_type;
4982         int status;
4983
4984         p = xdr_inline_decode(xdr, 4);
4985         if (unlikely(!p))
4986                 goto out_overflow;
4987         delegation_type = be32_to_cpup(p);
4988         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4989                 res->delegation_type = 0;
4990                 return 0;
4991         }
4992         status = decode_stateid(xdr, &res->delegation);
4993         if (unlikely(status))
4994                 return status;
4995         p = xdr_inline_decode(xdr, 4);
4996         if (unlikely(!p))
4997                 goto out_overflow;
4998         res->do_recall = be32_to_cpup(p);
4999
5000         switch (delegation_type) {
5001         case NFS4_OPEN_DELEGATE_READ:
5002                 res->delegation_type = FMODE_READ;
5003                 break;
5004         case NFS4_OPEN_DELEGATE_WRITE:
5005                 res->delegation_type = FMODE_WRITE|FMODE_READ;
5006                 if (decode_space_limit(xdr, &res->maxsize) < 0)
5007                                 return -EIO;
5008         }
5009         return decode_ace(xdr, NULL, res->server->nfs_client);
5010 out_overflow:
5011         print_overflow_msg(__func__, xdr);
5012         return -EIO;
5013 }
5014
5015 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5016 {
5017         __be32 *p;
5018         uint32_t savewords, bmlen, i;
5019         int status;
5020
5021         if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5022                 return status;
5023         nfs_increment_open_seqid(status, res->seqid);
5024         if (status)
5025                 return status;
5026         status = decode_stateid(xdr, &res->stateid);
5027         if (unlikely(status))
5028                 return status;
5029
5030         decode_change_info(xdr, &res->cinfo);
5031
5032         p = xdr_inline_decode(xdr, 8);
5033         if (unlikely(!p))
5034                 goto out_overflow;
5035         res->rflags = be32_to_cpup(p++);
5036         bmlen = be32_to_cpup(p);
5037         if (bmlen > 10)
5038                 goto xdr_error;
5039
5040         p = xdr_inline_decode(xdr, bmlen << 2);
5041         if (unlikely(!p))
5042                 goto out_overflow;
5043         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5044         for (i = 0; i < savewords; ++i)
5045                 res->attrset[i] = be32_to_cpup(p++);
5046         for (; i < NFS4_BITMAP_SIZE; i++)
5047                 res->attrset[i] = 0;
5048
5049         return decode_delegation(xdr, res);
5050 xdr_error:
5051         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5052         return -EIO;
5053 out_overflow:
5054         print_overflow_msg(__func__, xdr);
5055         return -EIO;
5056 }
5057
5058 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5059 {
5060         int status;
5061
5062         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5063         if (status != -EIO)
5064                 nfs_increment_open_seqid(status, res->seqid);
5065         if (!status)
5066                 status = decode_stateid(xdr, &res->stateid);
5067         return status;
5068 }
5069
5070 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5071 {
5072         int status;
5073
5074         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5075         if (status != -EIO)
5076                 nfs_increment_open_seqid(status, res->seqid);
5077         if (!status)
5078                 status = decode_stateid(xdr, &res->stateid);
5079         return status;
5080 }
5081
5082 static int decode_putfh(struct xdr_stream *xdr)
5083 {
5084         return decode_op_hdr(xdr, OP_PUTFH);
5085 }
5086
5087 static int decode_putrootfh(struct xdr_stream *xdr)
5088 {
5089         return decode_op_hdr(xdr, OP_PUTROOTFH);
5090 }
5091
5092 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5093                        struct nfs_pgio_res *res)
5094 {
5095         __be32 *p;
5096         uint32_t count, eof, recvd;
5097         int status;
5098
5099         status = decode_op_hdr(xdr, OP_READ);
5100         if (status)
5101                 return status;
5102         p = xdr_inline_decode(xdr, 8);
5103         if (unlikely(!p))
5104                 goto out_overflow;
5105         eof = be32_to_cpup(p++);
5106         count = be32_to_cpup(p);
5107         recvd = xdr_read_pages(xdr, count);
5108         if (count > recvd) {
5109                 dprintk("NFS: server cheating in read reply: "
5110                                 "count %u > recvd %u\n", count, recvd);
5111                 count = recvd;
5112                 eof = 0;
5113         }
5114         res->eof = eof;
5115         res->count = count;
5116         return 0;
5117 out_overflow:
5118         print_overflow_msg(__func__, xdr);
5119         return -EIO;
5120 }
5121
5122 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5123 {
5124         int             status;
5125         __be32          verf[2];
5126
5127         status = decode_op_hdr(xdr, OP_READDIR);
5128         if (!status)
5129                 status = decode_verifier(xdr, readdir->verifier.data);
5130         if (unlikely(status))
5131                 return status;
5132         memcpy(verf, readdir->verifier.data, sizeof(verf));
5133         dprintk("%s: verifier = %08x:%08x\n",
5134                         __func__, verf[0], verf[1]);
5135         return xdr_read_pages(xdr, xdr->buf->page_len);
5136 }
5137
5138 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5139 {
5140         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5141         u32 len, recvd;
5142         __be32 *p;
5143         int status;
5144
5145         status = decode_op_hdr(xdr, OP_READLINK);
5146         if (status)
5147                 return status;
5148
5149         /* Convert length of symlink */
5150         p = xdr_inline_decode(xdr, 4);
5151         if (unlikely(!p))
5152                 goto out_overflow;
5153         len = be32_to_cpup(p);
5154         if (len >= rcvbuf->page_len || len <= 0) {
5155                 dprintk("nfs: server returned giant symlink!\n");
5156                 return -ENAMETOOLONG;
5157         }
5158         recvd = xdr_read_pages(xdr, len);
5159         if (recvd < len) {
5160                 dprintk("NFS: server cheating in readlink reply: "
5161                                 "count %u > recvd %u\n", len, recvd);
5162                 return -EIO;
5163         }
5164         /*
5165          * The XDR encode routine has set things up so that
5166          * the link text will be copied directly into the
5167          * buffer.  We just have to do overflow-checking,
5168          * and and null-terminate the text (the VFS expects
5169          * null-termination).
5170          */
5171         xdr_terminate_string(rcvbuf, len);
5172         return 0;
5173 out_overflow:
5174         print_overflow_msg(__func__, xdr);
5175         return -EIO;
5176 }
5177
5178 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5179 {
5180         int status;
5181
5182         status = decode_op_hdr(xdr, OP_REMOVE);
5183         if (status)
5184                 goto out;
5185         status = decode_change_info(xdr, cinfo);
5186 out:
5187         return status;
5188 }
5189
5190 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5191               struct nfs4_change_info *new_cinfo)
5192 {
5193         int status;
5194
5195         status = decode_op_hdr(xdr, OP_RENAME);
5196         if (status)
5197                 goto out;
5198         if ((status = decode_change_info(xdr, old_cinfo)))
5199                 goto out;
5200         status = decode_change_info(xdr, new_cinfo);
5201 out:
5202         return status;
5203 }
5204
5205 static int decode_renew(struct xdr_stream *xdr)
5206 {
5207         return decode_op_hdr(xdr, OP_RENEW);
5208 }
5209
5210 static int
5211 decode_restorefh(struct xdr_stream *xdr)
5212 {
5213         return decode_op_hdr(xdr, OP_RESTOREFH);
5214 }
5215
5216 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5217                          struct nfs_getaclres *res)
5218 {
5219         unsigned int savep;
5220         uint32_t attrlen,
5221                  bitmap[3] = {0};
5222         int status;
5223         unsigned int pg_offset;
5224
5225         res->acl_len = 0;
5226         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5227                 goto out;
5228
5229         xdr_enter_page(xdr, xdr->buf->page_len);
5230
5231         /* Calculate the offset of the page data */
5232         pg_offset = xdr->buf->head[0].iov_len;
5233
5234         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5235                 goto out;
5236         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5237                 goto out;
5238
5239         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5240                 return -EIO;
5241         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5242
5243                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5244                  * are stored with the acl data to handle the problem of
5245                  * variable length bitmaps.*/
5246                 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5247                 res->acl_len = attrlen;
5248
5249                 /* Check for receive buffer overflow */
5250                 if (res->acl_len > (xdr->nwords << 2) ||
5251                     res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5252                         res->acl_flags |= NFS4_ACL_TRUNC;
5253                         dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5254                                         attrlen, xdr->nwords << 2);
5255                 }
5256         } else
5257                 status = -EOPNOTSUPP;
5258
5259 out:
5260         return status;
5261 }
5262
5263 static int
5264 decode_savefh(struct xdr_stream *xdr)
5265 {
5266         return decode_op_hdr(xdr, OP_SAVEFH);
5267 }
5268
5269 static int decode_setattr(struct xdr_stream *xdr)
5270 {
5271         __be32 *p;
5272         uint32_t bmlen;
5273         int status;
5274
5275         status = decode_op_hdr(xdr, OP_SETATTR);
5276         if (status)
5277                 return status;
5278         p = xdr_inline_decode(xdr, 4);
5279         if (unlikely(!p))
5280                 goto out_overflow;
5281         bmlen = be32_to_cpup(p);
5282         p = xdr_inline_decode(xdr, bmlen << 2);
5283         if (likely(p))
5284                 return 0;
5285 out_overflow:
5286         print_overflow_msg(__func__, xdr);
5287         return -EIO;
5288 }
5289
5290 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5291 {
5292         __be32 *p;
5293         uint32_t opnum;
5294         int32_t nfserr;
5295
5296         p = xdr_inline_decode(xdr, 8);
5297         if (unlikely(!p))
5298                 goto out_overflow;
5299         opnum = be32_to_cpup(p++);
5300         if (opnum != OP_SETCLIENTID) {
5301                 dprintk("nfs: decode_setclientid: Server returned operation"
5302                         " %d\n", opnum);
5303                 return -EIO;
5304         }
5305         nfserr = be32_to_cpup(p);
5306         if (nfserr == NFS_OK) {
5307                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5308                 if (unlikely(!p))
5309                         goto out_overflow;
5310                 p = xdr_decode_hyper(p, &res->clientid);
5311                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5312         } else if (nfserr == NFSERR_CLID_INUSE) {
5313                 uint32_t len;
5314
5315                 /* skip netid string */
5316                 p = xdr_inline_decode(xdr, 4);
5317                 if (unlikely(!p))
5318                         goto out_overflow;
5319                 len = be32_to_cpup(p);
5320                 p = xdr_inline_decode(xdr, len);
5321                 if (unlikely(!p))
5322                         goto out_overflow;
5323
5324                 /* skip uaddr string */
5325                 p = xdr_inline_decode(xdr, 4);
5326                 if (unlikely(!p))
5327                         goto out_overflow;
5328                 len = be32_to_cpup(p);
5329                 p = xdr_inline_decode(xdr, len);
5330                 if (unlikely(!p))
5331                         goto out_overflow;
5332                 return -NFSERR_CLID_INUSE;
5333         } else
5334                 return nfs4_stat_to_errno(nfserr);
5335
5336         return 0;
5337 out_overflow:
5338         print_overflow_msg(__func__, xdr);
5339         return -EIO;
5340 }
5341
5342 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5343 {
5344         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5345 }
5346
5347 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5348 {
5349         __be32 *p;
5350         int status;
5351
5352         status = decode_op_hdr(xdr, OP_WRITE);
5353         if (status)
5354                 return status;
5355
5356         p = xdr_inline_decode(xdr, 8);
5357         if (unlikely(!p))
5358                 goto out_overflow;
5359         res->count = be32_to_cpup(p++);
5360         res->verf->committed = be32_to_cpup(p++);
5361         return decode_write_verifier(xdr, &res->verf->verifier);
5362 out_overflow:
5363         print_overflow_msg(__func__, xdr);
5364         return -EIO;
5365 }
5366
5367 static int decode_delegreturn(struct xdr_stream *xdr)
5368 {
5369         return decode_op_hdr(xdr, OP_DELEGRETURN);
5370 }
5371
5372 static int decode_secinfo_gss(struct xdr_stream *xdr,
5373                               struct nfs4_secinfo4 *flavor)
5374 {
5375         u32 oid_len;
5376         __be32 *p;
5377
5378         p = xdr_inline_decode(xdr, 4);
5379         if (unlikely(!p))
5380                 goto out_overflow;
5381         oid_len = be32_to_cpup(p);
5382         if (oid_len > GSS_OID_MAX_LEN)
5383                 goto out_err;
5384
5385         p = xdr_inline_decode(xdr, oid_len);
5386         if (unlikely(!p))
5387                 goto out_overflow;
5388         memcpy(flavor->flavor_info.oid.data, p, oid_len);
5389         flavor->flavor_info.oid.len = oid_len;
5390
5391         p = xdr_inline_decode(xdr, 8);
5392         if (unlikely(!p))
5393                 goto out_overflow;
5394         flavor->flavor_info.qop = be32_to_cpup(p++);
5395         flavor->flavor_info.service = be32_to_cpup(p);
5396
5397         return 0;
5398
5399 out_overflow:
5400         print_overflow_msg(__func__, xdr);
5401         return -EIO;
5402 out_err:
5403         return -EINVAL;
5404 }
5405
5406 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5407 {
5408         struct nfs4_secinfo4 *sec_flavor;
5409         unsigned int i, num_flavors;
5410         int status;
5411         __be32 *p;
5412
5413         p = xdr_inline_decode(xdr, 4);
5414         if (unlikely(!p))
5415                 goto out_overflow;
5416
5417         res->flavors->num_flavors = 0;
5418         num_flavors = be32_to_cpup(p);
5419
5420         for (i = 0; i < num_flavors; i++) {
5421                 sec_flavor = &res->flavors->flavors[i];
5422                 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5423                         break;
5424
5425                 p = xdr_inline_decode(xdr, 4);
5426                 if (unlikely(!p))
5427                         goto out_overflow;
5428                 sec_flavor->flavor = be32_to_cpup(p);
5429
5430                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5431                         status = decode_secinfo_gss(xdr, sec_flavor);
5432                         if (status)
5433                                 goto out;
5434                 }
5435                 res->flavors->num_flavors++;
5436         }
5437
5438         status = 0;
5439 out:
5440         return status;
5441 out_overflow:
5442         print_overflow_msg(__func__, xdr);
5443         return -EIO;
5444 }
5445
5446 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5447 {
5448         int status = decode_op_hdr(xdr, OP_SECINFO);
5449         if (status)
5450                 return status;
5451         return decode_secinfo_common(xdr, res);
5452 }
5453
5454 #if defined(CONFIG_NFS_V4_1)
5455 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5456 {
5457         int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5458         if (status)
5459                 return status;
5460         return decode_secinfo_common(xdr, res);
5461 }
5462
5463 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5464 {
5465         __be32 *p;
5466         uint32_t bitmap_words;
5467         unsigned int i;
5468
5469         p = xdr_inline_decode(xdr, 4);
5470         bitmap_words = be32_to_cpup(p++);
5471         if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5472                 return -EIO;
5473         p = xdr_inline_decode(xdr, 4 * bitmap_words);
5474         for (i = 0; i < bitmap_words; i++)
5475                 op_map->u.words[i] = be32_to_cpup(p++);
5476
5477         return 0;
5478 }
5479
5480 static int decode_exchange_id(struct xdr_stream *xdr,
5481                               struct nfs41_exchange_id_res *res)
5482 {
5483         __be32 *p;
5484         uint32_t dummy;
5485         char *dummy_str;
5486         int status;
5487         uint32_t impl_id_count;
5488
5489         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5490         if (status)
5491                 return status;
5492
5493         p = xdr_inline_decode(xdr, 8);
5494         if (unlikely(!p))
5495                 goto out_overflow;
5496         xdr_decode_hyper(p, &res->clientid);
5497         p = xdr_inline_decode(xdr, 12);
5498         if (unlikely(!p))
5499                 goto out_overflow;
5500         res->seqid = be32_to_cpup(p++);
5501         res->flags = be32_to_cpup(p++);
5502
5503         res->state_protect.how = be32_to_cpup(p);
5504         switch (res->state_protect.how) {
5505         case SP4_NONE:
5506                 break;
5507         case SP4_MACH_CRED:
5508                 status = decode_op_map(xdr, &res->state_protect.enforce);
5509                 if (status)
5510                         return status;
5511                 status = decode_op_map(xdr, &res->state_protect.allow);
5512                 if (status)
5513                         return status;
5514                 break;
5515         default:
5516                 WARN_ON_ONCE(1);
5517                 return -EIO;
5518         }
5519
5520         /* server_owner4.so_minor_id */
5521         p = xdr_inline_decode(xdr, 8);
5522         if (unlikely(!p))
5523                 goto out_overflow;
5524         p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5525
5526         /* server_owner4.so_major_id */
5527         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5528         if (unlikely(status))
5529                 return status;
5530         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5531                 return -EIO;
5532         memcpy(res->server_owner->major_id, dummy_str, dummy);
5533         res->server_owner->major_id_sz = dummy;
5534
5535         /* server_scope4 */
5536         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5537         if (unlikely(status))
5538                 return status;
5539         if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5540                 return -EIO;
5541         memcpy(res->server_scope->server_scope, dummy_str, dummy);
5542         res->server_scope->server_scope_sz = dummy;
5543
5544         /* Implementation Id */
5545         p = xdr_inline_decode(xdr, 4);
5546         if (unlikely(!p))
5547                 goto out_overflow;
5548         impl_id_count = be32_to_cpup(p++);
5549
5550         if (impl_id_count) {
5551                 /* nii_domain */
5552                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5553                 if (unlikely(status))
5554                         return status;
5555                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5556                         return -EIO;
5557                 memcpy(res->impl_id->domain, dummy_str, dummy);
5558
5559                 /* nii_name */
5560                 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5561                 if (unlikely(status))
5562                         return status;
5563                 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5564                         return -EIO;
5565                 memcpy(res->impl_id->name, dummy_str, dummy);
5566
5567                 /* nii_date */
5568                 p = xdr_inline_decode(xdr, 12);
5569                 if (unlikely(!p))
5570                         goto out_overflow;
5571                 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5572                 res->impl_id->date.nseconds = be32_to_cpup(p);
5573
5574                 /* if there's more than one entry, ignore the rest */
5575         }
5576         return 0;
5577 out_overflow:
5578         print_overflow_msg(__func__, xdr);
5579         return -EIO;
5580 }
5581
5582 static int decode_chan_attrs(struct xdr_stream *xdr,
5583                              struct nfs4_channel_attrs *attrs)
5584 {
5585         __be32 *p;
5586         u32 nr_attrs, val;
5587
5588         p = xdr_inline_decode(xdr, 28);
5589         if (unlikely(!p))
5590                 goto out_overflow;
5591         val = be32_to_cpup(p++);        /* headerpadsz */
5592         if (val)
5593                 return -EINVAL;         /* no support for header padding yet */
5594         attrs->max_rqst_sz = be32_to_cpup(p++);
5595         attrs->max_resp_sz = be32_to_cpup(p++);
5596         attrs->max_resp_sz_cached = be32_to_cpup(p++);
5597         attrs->max_ops = be32_to_cpup(p++);
5598         attrs->max_reqs = be32_to_cpup(p++);
5599         nr_attrs = be32_to_cpup(p);
5600         if (unlikely(nr_attrs > 1)) {
5601                 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5602                         "count %u\n", __func__, nr_attrs);
5603                 return -EINVAL;
5604         }
5605         if (nr_attrs == 1) {
5606                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5607                 if (unlikely(!p))
5608                         goto out_overflow;
5609         }
5610         return 0;
5611 out_overflow:
5612         print_overflow_msg(__func__, xdr);
5613         return -EIO;
5614 }
5615
5616 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5617 {
5618         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5619 }
5620
5621 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5622                                 struct nfs41_bind_conn_to_session_res *res)
5623 {
5624         __be32 *p;
5625         int status;
5626
5627         status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5628         if (!status)
5629                 status = decode_sessionid(xdr, &res->session->sess_id);
5630         if (unlikely(status))
5631                 return status;
5632
5633         /* dir flags, rdma mode bool */
5634         p = xdr_inline_decode(xdr, 8);
5635         if (unlikely(!p))
5636                 goto out_overflow;
5637
5638         res->dir = be32_to_cpup(p++);
5639         if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5640                 return -EIO;
5641         if (be32_to_cpup(p) == 0)
5642                 res->use_conn_in_rdma_mode = false;
5643         else
5644                 res->use_conn_in_rdma_mode = true;
5645
5646         return 0;
5647 out_overflow:
5648         print_overflow_msg(__func__, xdr);
5649         return -EIO;
5650 }
5651
5652 static int decode_create_session(struct xdr_stream *xdr,
5653                                  struct nfs41_create_session_res *res)
5654 {
5655         __be32 *p;
5656         int status;
5657         struct nfs_client *clp = res->client;
5658         struct nfs4_session *session = clp->cl_session;
5659
5660         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5661         if (!status)
5662                 status = decode_sessionid(xdr, &session->sess_id);
5663         if (unlikely(status))
5664                 return status;
5665
5666         /* seqid, flags */
5667         p = xdr_inline_decode(xdr, 8);
5668         if (unlikely(!p))
5669                 goto out_overflow;
5670         clp->cl_seqid = be32_to_cpup(p++);
5671         session->flags = be32_to_cpup(p);
5672
5673         /* Channel attributes */
5674         status = decode_chan_attrs(xdr, &session->fc_attrs);
5675         if (!status)
5676                 status = decode_chan_attrs(xdr, &session->bc_attrs);
5677         return status;
5678 out_overflow:
5679         print_overflow_msg(__func__, xdr);
5680         return -EIO;
5681 }
5682
5683 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5684 {
5685         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5686 }
5687
5688 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5689 {
5690         return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5691 }
5692
5693 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5694 {
5695         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5696 }
5697 #endif /* CONFIG_NFS_V4_1 */
5698
5699 static int decode_sequence(struct xdr_stream *xdr,
5700                            struct nfs4_sequence_res *res,
5701                            struct rpc_rqst *rqstp)
5702 {
5703 #if defined(CONFIG_NFS_V4_1)
5704         struct nfs4_session *session;
5705         struct nfs4_sessionid id;
5706         u32 dummy;
5707         int status;
5708         __be32 *p;
5709
5710         if (res->sr_slot == NULL)
5711                 return 0;
5712         if (!res->sr_slot->table->session)
5713                 return 0;
5714
5715         status = decode_op_hdr(xdr, OP_SEQUENCE);
5716         if (!status)
5717                 status = decode_sessionid(xdr, &id);
5718         if (unlikely(status))
5719                 goto out_err;
5720
5721         /*
5722          * If the server returns different values for sessionID, slotID or
5723          * sequence number, the server is looney tunes.
5724          */
5725         status = -EREMOTEIO;
5726         session = res->sr_slot->table->session;
5727
5728         if (memcmp(id.data, session->sess_id.data,
5729                    NFS4_MAX_SESSIONID_LEN)) {
5730                 dprintk("%s Invalid session id\n", __func__);
5731                 goto out_err;
5732         }
5733
5734         p = xdr_inline_decode(xdr, 20);
5735         if (unlikely(!p))
5736                 goto out_overflow;
5737
5738         /* seqid */
5739         dummy = be32_to_cpup(p++);
5740         if (dummy != res->sr_slot->seq_nr) {
5741                 dprintk("%s Invalid sequence number\n", __func__);
5742                 goto out_err;
5743         }
5744         /* slot id */
5745         dummy = be32_to_cpup(p++);
5746         if (dummy != res->sr_slot->slot_nr) {
5747                 dprintk("%s Invalid slot id\n", __func__);
5748                 goto out_err;
5749         }
5750         /* highest slot id */
5751         res->sr_highest_slotid = be32_to_cpup(p++);
5752         /* target highest slot id */
5753         res->sr_target_highest_slotid = be32_to_cpup(p++);
5754         /* result flags */
5755         res->sr_status_flags = be32_to_cpup(p);
5756         status = 0;
5757 out_err:
5758         res->sr_status = status;
5759         return status;
5760 out_overflow:
5761         print_overflow_msg(__func__, xdr);
5762         status = -EIO;
5763         goto out_err;
5764 #else  /* CONFIG_NFS_V4_1 */
5765         return 0;
5766 #endif /* CONFIG_NFS_V4_1 */
5767 }
5768
5769 #if defined(CONFIG_NFS_V4_1)
5770 /*
5771  * TODO: Need to handle case when EOF != true;
5772  */
5773 static int decode_getdevicelist(struct xdr_stream *xdr,
5774                                 struct pnfs_devicelist *res)
5775 {
5776         __be32 *p;
5777         int status, i;
5778         nfs4_verifier verftemp;
5779
5780         status = decode_op_hdr(xdr, OP_GETDEVICELIST);
5781         if (status)
5782                 return status;
5783
5784         p = xdr_inline_decode(xdr, 8 + 8 + 4);
5785         if (unlikely(!p))
5786                 goto out_overflow;
5787
5788         /* TODO: Skip cookie for now */
5789         p += 2;
5790
5791         /* Read verifier */
5792         p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE);
5793
5794         res->num_devs = be32_to_cpup(p);
5795
5796         dprintk("%s: num_dev %d\n", __func__, res->num_devs);
5797
5798         if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
5799                 printk(KERN_ERR "NFS: %s too many result dev_num %u\n",
5800                                 __func__, res->num_devs);
5801                 return -EIO;
5802         }
5803
5804         p = xdr_inline_decode(xdr,
5805                               res->num_devs * NFS4_DEVICEID4_SIZE + 4);
5806         if (unlikely(!p))
5807                 goto out_overflow;
5808         for (i = 0; i < res->num_devs; i++)
5809                 p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
5810                                             NFS4_DEVICEID4_SIZE);
5811         res->eof = be32_to_cpup(p);
5812         return 0;
5813 out_overflow:
5814         print_overflow_msg(__func__, xdr);
5815         return -EIO;
5816 }
5817
5818 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5819                                 struct pnfs_device *pdev)
5820 {
5821         __be32 *p;
5822         uint32_t len, type;
5823         int status;
5824
5825         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5826         if (status) {
5827                 if (status == -ETOOSMALL) {
5828                         p = xdr_inline_decode(xdr, 4);
5829                         if (unlikely(!p))
5830                                 goto out_overflow;
5831                         pdev->mincount = be32_to_cpup(p);
5832                         dprintk("%s: Min count too small. mincnt = %u\n",
5833                                 __func__, pdev->mincount);
5834                 }
5835                 return status;
5836         }
5837
5838         p = xdr_inline_decode(xdr, 8);
5839         if (unlikely(!p))
5840                 goto out_overflow;
5841         type = be32_to_cpup(p++);
5842         if (type != pdev->layout_type) {
5843                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5844                         __func__, pdev->layout_type, type);
5845                 return -EINVAL;
5846         }
5847         /*
5848          * Get the length of the opaque device_addr4. xdr_read_pages places
5849          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5850          * and places the remaining xdr data in xdr_buf->tail
5851          */
5852         pdev->mincount = be32_to_cpup(p);
5853         if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5854                 goto out_overflow;
5855
5856         /* Parse notification bitmap, verifying that it is zero. */
5857         p = xdr_inline_decode(xdr, 4);
5858         if (unlikely(!p))
5859                 goto out_overflow;
5860         len = be32_to_cpup(p);
5861         if (len) {
5862                 uint32_t i;
5863
5864                 p = xdr_inline_decode(xdr, 4 * len);
5865                 if (unlikely(!p))
5866                         goto out_overflow;
5867                 for (i = 0; i < len; i++, p++) {
5868                         if (be32_to_cpup(p)) {
5869                                 dprintk("%s: notifications not supported\n",
5870                                         __func__);
5871                                 return -EIO;
5872                         }
5873                 }
5874         }
5875         return 0;
5876 out_overflow:
5877         print_overflow_msg(__func__, xdr);
5878         return -EIO;
5879 }
5880
5881 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5882                             struct nfs4_layoutget_res *res)
5883 {
5884         __be32 *p;
5885         int status;
5886         u32 layout_count;
5887         u32 recvd;
5888
5889         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5890         if (status)
5891                 return status;
5892         p = xdr_inline_decode(xdr, 4);
5893         if (unlikely(!p))
5894                 goto out_overflow;
5895         res->return_on_close = be32_to_cpup(p);
5896         decode_stateid(xdr, &res->stateid);
5897         p = xdr_inline_decode(xdr, 4);
5898         if (unlikely(!p))
5899                 goto out_overflow;
5900         layout_count = be32_to_cpup(p);
5901         if (!layout_count) {
5902                 dprintk("%s: server responded with empty layout array\n",
5903                         __func__);
5904                 return -EINVAL;
5905         }
5906
5907         p = xdr_inline_decode(xdr, 28);
5908         if (unlikely(!p))
5909                 goto out_overflow;
5910         p = xdr_decode_hyper(p, &res->range.offset);
5911         p = xdr_decode_hyper(p, &res->range.length);
5912         res->range.iomode = be32_to_cpup(p++);
5913         res->type = be32_to_cpup(p++);
5914         res->layoutp->len = be32_to_cpup(p);
5915
5916         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5917                 __func__,
5918                 (unsigned long)res->range.offset,
5919                 (unsigned long)res->range.length,
5920                 res->range.iomode,
5921                 res->type,
5922                 res->layoutp->len);
5923
5924         recvd = xdr_read_pages(xdr, res->layoutp->len);
5925         if (res->layoutp->len > recvd) {
5926                 dprintk("NFS: server cheating in layoutget reply: "
5927                                 "layout len %u > recvd %u\n",
5928                                 res->layoutp->len, recvd);
5929                 return -EINVAL;
5930         }
5931
5932         if (layout_count > 1) {
5933                 /* We only handle a length one array at the moment.  Any
5934                  * further entries are just ignored.  Note that this means
5935                  * the client may see a response that is less than the
5936                  * minimum it requested.
5937                  */
5938                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5939                         __func__, layout_count);
5940         }
5941
5942         return 0;
5943 out_overflow:
5944         print_overflow_msg(__func__, xdr);
5945         return -EIO;
5946 }
5947
5948 static int decode_layoutreturn(struct xdr_stream *xdr,
5949                                struct nfs4_layoutreturn_res *res)
5950 {
5951         __be32 *p;
5952         int status;
5953
5954         status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5955         if (status)
5956                 return status;
5957         p = xdr_inline_decode(xdr, 4);
5958         if (unlikely(!p))
5959                 goto out_overflow;
5960         res->lrs_present = be32_to_cpup(p);
5961         if (res->lrs_present)
5962                 status = decode_stateid(xdr, &res->stateid);
5963         return status;
5964 out_overflow:
5965         print_overflow_msg(__func__, xdr);
5966         return -EIO;
5967 }
5968
5969 static int decode_layoutcommit(struct xdr_stream *xdr,
5970                                struct rpc_rqst *req,
5971                                struct nfs4_layoutcommit_res *res)
5972 {
5973         __be32 *p;
5974         __u32 sizechanged;
5975         int status;
5976
5977         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5978         res->status = status;
5979         if (status)
5980                 return status;
5981
5982         p = xdr_inline_decode(xdr, 4);
5983         if (unlikely(!p))
5984                 goto out_overflow;
5985         sizechanged = be32_to_cpup(p);
5986
5987         if (sizechanged) {
5988                 /* throw away new size */
5989                 p = xdr_inline_decode(xdr, 8);
5990                 if (unlikely(!p))
5991                         goto out_overflow;
5992         }
5993         return 0;
5994 out_overflow:
5995         print_overflow_msg(__func__, xdr);
5996         return -EIO;
5997 }
5998
5999 static int decode_test_stateid(struct xdr_stream *xdr,
6000                                struct nfs41_test_stateid_res *res)
6001 {
6002         __be32 *p;
6003         int status;
6004         int num_res;
6005
6006         status = decode_op_hdr(xdr, OP_TEST_STATEID);
6007         if (status)
6008                 return status;
6009
6010         p = xdr_inline_decode(xdr, 4);
6011         if (unlikely(!p))
6012                 goto out_overflow;
6013         num_res = be32_to_cpup(p++);
6014         if (num_res != 1)
6015                 goto out;
6016
6017         p = xdr_inline_decode(xdr, 4);
6018         if (unlikely(!p))
6019                 goto out_overflow;
6020         res->status = be32_to_cpup(p++);
6021
6022         return status;
6023 out_overflow:
6024         print_overflow_msg(__func__, xdr);
6025 out:
6026         return -EIO;
6027 }
6028
6029 static int decode_free_stateid(struct xdr_stream *xdr,
6030                                struct nfs41_free_stateid_res *res)
6031 {
6032         res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6033         return res->status;
6034 }
6035 #endif /* CONFIG_NFS_V4_1 */
6036
6037 /*
6038  * END OF "GENERIC" DECODE ROUTINES.
6039  */
6040
6041 /*
6042  * Decode OPEN_DOWNGRADE response
6043  */
6044 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6045                                        struct xdr_stream *xdr,
6046                                        struct nfs_closeres *res)
6047 {
6048         struct compound_hdr hdr;
6049         int status;
6050
6051         status = decode_compound_hdr(xdr, &hdr);
6052         if (status)
6053                 goto out;
6054         status = decode_sequence(xdr, &res->seq_res, rqstp);
6055         if (status)
6056                 goto out;
6057         status = decode_putfh(xdr);
6058         if (status)
6059                 goto out;
6060         status = decode_open_downgrade(xdr, res);
6061         if (status != 0)
6062                 goto out;
6063         decode_getfattr(xdr, res->fattr, res->server);
6064 out:
6065         return status;
6066 }
6067
6068 /*
6069  * Decode ACCESS response
6070  */
6071 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6072                                struct nfs4_accessres *res)
6073 {
6074         struct compound_hdr hdr;
6075         int status;
6076
6077         status = decode_compound_hdr(xdr, &hdr);
6078         if (status)
6079                 goto out;
6080         status = decode_sequence(xdr, &res->seq_res, rqstp);
6081         if (status)
6082                 goto out;
6083         status = decode_putfh(xdr);
6084         if (status != 0)
6085                 goto out;
6086         status = decode_access(xdr, &res->supported, &res->access);
6087         if (status != 0)
6088                 goto out;
6089         decode_getfattr(xdr, res->fattr, res->server);
6090 out:
6091         return status;
6092 }
6093
6094 /*
6095  * Decode LOOKUP response
6096  */
6097 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6098                                struct nfs4_lookup_res *res)
6099 {
6100         struct compound_hdr hdr;
6101         int status;
6102
6103         status = decode_compound_hdr(xdr, &hdr);
6104         if (status)
6105                 goto out;
6106         status = decode_sequence(xdr, &res->seq_res, rqstp);
6107         if (status)
6108                 goto out;
6109         status = decode_putfh(xdr);
6110         if (status)
6111                 goto out;
6112         status = decode_lookup(xdr);
6113         if (status)
6114                 goto out;
6115         status = decode_getfh(xdr, res->fh);
6116         if (status)
6117                 goto out;
6118         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6119 out:
6120         return status;
6121 }
6122
6123 /*
6124  * Decode LOOKUP_ROOT response
6125  */
6126 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6127                                     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_putrootfh(xdr);
6140         if (status)
6141                 goto out;
6142         status = decode_getfh(xdr, res->fh);
6143         if (status == 0)
6144                 status = decode_getfattr_label(xdr, res->fattr,
6145                                                 res->label, res->server);
6146 out:
6147         return status;
6148 }
6149
6150 /*
6151  * Decode REMOVE response
6152  */
6153 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6154                                struct nfs_removeres *res)
6155 {
6156         struct compound_hdr hdr;
6157         int status;
6158
6159         status = decode_compound_hdr(xdr, &hdr);
6160         if (status)
6161                 goto out;
6162         status = decode_sequence(xdr, &res->seq_res, rqstp);
6163         if (status)
6164                 goto out;
6165         status = decode_putfh(xdr);
6166         if (status)
6167                 goto out;
6168         status = decode_remove(xdr, &res->cinfo);
6169 out:
6170         return status;
6171 }
6172
6173 /*
6174  * Decode RENAME response
6175  */
6176 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6177                                struct nfs_renameres *res)
6178 {
6179         struct compound_hdr hdr;
6180         int status;
6181
6182         status = decode_compound_hdr(xdr, &hdr);
6183         if (status)
6184                 goto out;
6185         status = decode_sequence(xdr, &res->seq_res, rqstp);
6186         if (status)
6187                 goto out;
6188         status = decode_putfh(xdr);
6189         if (status)
6190                 goto out;
6191         status = decode_savefh(xdr);
6192         if (status)
6193                 goto out;
6194         status = decode_putfh(xdr);
6195         if (status)
6196                 goto out;
6197         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6198 out:
6199         return status;
6200 }
6201
6202 /*
6203  * Decode LINK response
6204  */
6205 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6206                              struct nfs4_link_res *res)
6207 {
6208         struct compound_hdr hdr;
6209         int status;
6210
6211         status = decode_compound_hdr(xdr, &hdr);
6212         if (status)
6213                 goto out;
6214         status = decode_sequence(xdr, &res->seq_res, rqstp);
6215         if (status)
6216                 goto out;
6217         status = decode_putfh(xdr);
6218         if (status)
6219                 goto out;
6220         status = decode_savefh(xdr);
6221         if (status)
6222                 goto out;
6223         status = decode_putfh(xdr);
6224         if (status)
6225                 goto out;
6226         status = decode_link(xdr, &res->cinfo);
6227         if (status)
6228                 goto out;
6229         /*
6230          * Note order: OP_LINK leaves the directory as the current
6231          *             filehandle.
6232          */
6233         status = decode_restorefh(xdr);
6234         if (status)
6235                 goto out;
6236         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6237 out:
6238         return status;
6239 }
6240
6241 /*
6242  * Decode CREATE response
6243  */
6244 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6245                                struct nfs4_create_res *res)
6246 {
6247         struct compound_hdr hdr;
6248         int status;
6249
6250         status = decode_compound_hdr(xdr, &hdr);
6251         if (status)
6252                 goto out;
6253         status = decode_sequence(xdr, &res->seq_res, rqstp);
6254         if (status)
6255                 goto out;
6256         status = decode_putfh(xdr);
6257         if (status)
6258                 goto out;
6259         status = decode_create(xdr, &res->dir_cinfo);
6260         if (status)
6261                 goto out;
6262         status = decode_getfh(xdr, res->fh);
6263         if (status)
6264                 goto out;
6265         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6266 out:
6267         return status;
6268 }
6269
6270 /*
6271  * Decode SYMLINK response
6272  */
6273 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6274                                 struct nfs4_create_res *res)
6275 {
6276         return nfs4_xdr_dec_create(rqstp, xdr, res);
6277 }
6278
6279 /*
6280  * Decode GETATTR response
6281  */
6282 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6283                                 struct nfs4_getattr_res *res)
6284 {
6285         struct compound_hdr hdr;
6286         int status;
6287
6288         status = decode_compound_hdr(xdr, &hdr);
6289         if (status)
6290                 goto out;
6291         status = decode_sequence(xdr, &res->seq_res, rqstp);
6292         if (status)
6293                 goto out;
6294         status = decode_putfh(xdr);
6295         if (status)
6296                 goto out;
6297         status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6298 out:
6299         return status;
6300 }
6301
6302 /*
6303  * Encode an SETACL request
6304  */
6305 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6306                                 struct nfs_setaclargs *args)
6307 {
6308         struct compound_hdr hdr = {
6309                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6310         };
6311
6312         encode_compound_hdr(xdr, req, &hdr);
6313         encode_sequence(xdr, &args->seq_args, &hdr);
6314         encode_putfh(xdr, args->fh, &hdr);
6315         encode_setacl(xdr, args, &hdr);
6316         encode_nops(&hdr);
6317 }
6318
6319 /*
6320  * Decode SETACL response
6321  */
6322 static int
6323 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6324                     struct nfs_setaclres *res)
6325 {
6326         struct compound_hdr hdr;
6327         int status;
6328
6329         status = decode_compound_hdr(xdr, &hdr);
6330         if (status)
6331                 goto out;
6332         status = decode_sequence(xdr, &res->seq_res, rqstp);
6333         if (status)
6334                 goto out;
6335         status = decode_putfh(xdr);
6336         if (status)
6337                 goto out;
6338         status = decode_setattr(xdr);
6339 out:
6340         return status;
6341 }
6342
6343 /*
6344  * Decode GETACL response
6345  */
6346 static int
6347 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6348                     struct nfs_getaclres *res)
6349 {
6350         struct compound_hdr hdr;
6351         int status;
6352
6353         if (res->acl_scratch != NULL) {
6354                 void *p = page_address(res->acl_scratch);
6355                 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6356         }
6357         status = decode_compound_hdr(xdr, &hdr);
6358         if (status)
6359                 goto out;
6360         status = decode_sequence(xdr, &res->seq_res, rqstp);
6361         if (status)
6362                 goto out;
6363         status = decode_putfh(xdr);
6364         if (status)
6365                 goto out;
6366         status = decode_getacl(xdr, rqstp, res);
6367
6368 out:
6369         return status;
6370 }
6371
6372 /*
6373  * Decode CLOSE response
6374  */
6375 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6376                               struct nfs_closeres *res)
6377 {
6378         struct compound_hdr hdr;
6379         int status;
6380
6381         status = decode_compound_hdr(xdr, &hdr);
6382         if (status)
6383                 goto out;
6384         status = decode_sequence(xdr, &res->seq_res, rqstp);
6385         if (status)
6386                 goto out;
6387         status = decode_putfh(xdr);
6388         if (status)
6389                 goto out;
6390         status = decode_close(xdr, res);
6391         if (status != 0)
6392                 goto out;
6393         /*
6394          * Note: Server may do delete on close for this file
6395          *      in which case the getattr call will fail with
6396          *      an ESTALE error. Shouldn't be a problem,
6397          *      though, since fattr->valid will remain unset.
6398          */
6399         decode_getfattr(xdr, res->fattr, res->server);
6400 out:
6401         return status;
6402 }
6403
6404 /*
6405  * Decode OPEN response
6406  */
6407 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6408                              struct nfs_openres *res)
6409 {
6410         struct compound_hdr hdr;
6411         int status;
6412
6413         status = decode_compound_hdr(xdr, &hdr);
6414         if (status)
6415                 goto out;
6416         status = decode_sequence(xdr, &res->seq_res, rqstp);
6417         if (status)
6418                 goto out;
6419         status = decode_putfh(xdr);
6420         if (status)
6421                 goto out;
6422         status = decode_open(xdr, res);
6423         if (status)
6424                 goto out;
6425         status = decode_getfh(xdr, &res->fh);
6426         if (status)
6427                 goto out;
6428         if (res->access_request)
6429                 decode_access(xdr, &res->access_supported, &res->access_result);
6430         decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6431 out:
6432         return status;
6433 }
6434
6435 /*
6436  * Decode OPEN_CONFIRM response
6437  */
6438 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6439                                      struct xdr_stream *xdr,
6440                                      struct nfs_open_confirmres *res)
6441 {
6442         struct compound_hdr hdr;
6443         int status;
6444
6445         status = decode_compound_hdr(xdr, &hdr);
6446         if (status)
6447                 goto out;
6448         status = decode_putfh(xdr);
6449         if (status)
6450                 goto out;
6451         status = decode_open_confirm(xdr, res);
6452 out:
6453         return status;
6454 }
6455
6456 /*
6457  * Decode OPEN response
6458  */
6459 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6460                                     struct xdr_stream *xdr,
6461                                     struct nfs_openres *res)
6462 {
6463         struct compound_hdr hdr;
6464         int status;
6465
6466         status = decode_compound_hdr(xdr, &hdr);
6467         if (status)
6468                 goto out;
6469         status = decode_sequence(xdr, &res->seq_res, rqstp);
6470         if (status)
6471                 goto out;
6472         status = decode_putfh(xdr);
6473         if (status)
6474                 goto out;
6475         status = decode_open(xdr, res);
6476         if (status)
6477                 goto out;
6478         if (res->access_request)
6479                 decode_access(xdr, &res->access_supported, &res->access_result);
6480         decode_getfattr(xdr, res->f_attr, res->server);
6481 out:
6482         return status;
6483 }
6484
6485 /*
6486  * Decode SETATTR response
6487  */
6488 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6489                                 struct xdr_stream *xdr,
6490                                 struct nfs_setattrres *res)
6491 {
6492         struct compound_hdr hdr;
6493         int status;
6494
6495         status = decode_compound_hdr(xdr, &hdr);
6496         if (status)
6497                 goto out;
6498         status = decode_sequence(xdr, &res->seq_res, rqstp);
6499         if (status)
6500                 goto out;
6501         status = decode_putfh(xdr);
6502         if (status)
6503                 goto out;
6504         status = decode_setattr(xdr);
6505         if (status)
6506                 goto out;
6507         decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6508 out:
6509         return status;
6510 }
6511
6512 /*
6513  * Decode LOCK response
6514  */
6515 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6516                              struct nfs_lock_res *res)
6517 {
6518         struct compound_hdr hdr;
6519         int status;
6520
6521         status = decode_compound_hdr(xdr, &hdr);
6522         if (status)
6523                 goto out;
6524         status = decode_sequence(xdr, &res->seq_res, rqstp);
6525         if (status)
6526                 goto out;
6527         status = decode_putfh(xdr);
6528         if (status)
6529                 goto out;
6530         status = decode_lock(xdr, res);
6531 out:
6532         return status;
6533 }
6534
6535 /*
6536  * Decode LOCKT response
6537  */
6538 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6539                               struct nfs_lockt_res *res)
6540 {
6541         struct compound_hdr hdr;
6542         int status;
6543
6544         status = decode_compound_hdr(xdr, &hdr);
6545         if (status)
6546                 goto out;
6547         status = decode_sequence(xdr, &res->seq_res, rqstp);
6548         if (status)
6549                 goto out;
6550         status = decode_putfh(xdr);
6551         if (status)
6552                 goto out;
6553         status = decode_lockt(xdr, res);
6554 out:
6555         return status;
6556 }
6557
6558 /*
6559  * Decode LOCKU response
6560  */
6561 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6562                               struct nfs_locku_res *res)
6563 {
6564         struct compound_hdr hdr;
6565         int status;
6566
6567         status = decode_compound_hdr(xdr, &hdr);
6568         if (status)
6569                 goto out;
6570         status = decode_sequence(xdr, &res->seq_res, rqstp);
6571         if (status)
6572                 goto out;
6573         status = decode_putfh(xdr);
6574         if (status)
6575                 goto out;
6576         status = decode_locku(xdr, res);
6577 out:
6578         return status;
6579 }
6580
6581 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6582                                           struct xdr_stream *xdr, void *dummy)
6583 {
6584         struct compound_hdr hdr;
6585         int status;
6586
6587         status = decode_compound_hdr(xdr, &hdr);
6588         if (!status)
6589                 status = decode_release_lockowner(xdr);
6590         return status;
6591 }
6592
6593 /*
6594  * Decode READLINK response
6595  */
6596 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6597                                  struct xdr_stream *xdr,
6598                                  struct nfs4_readlink_res *res)
6599 {
6600         struct compound_hdr hdr;
6601         int status;
6602
6603         status = decode_compound_hdr(xdr, &hdr);
6604         if (status)
6605                 goto out;
6606         status = decode_sequence(xdr, &res->seq_res, rqstp);
6607         if (status)
6608                 goto out;
6609         status = decode_putfh(xdr);
6610         if (status)
6611                 goto out;
6612         status = decode_readlink(xdr, rqstp);
6613 out:
6614         return status;
6615 }
6616
6617 /*
6618  * Decode READDIR response
6619  */
6620 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6621                                 struct nfs4_readdir_res *res)
6622 {
6623         struct compound_hdr hdr;
6624         int status;
6625
6626         status = decode_compound_hdr(xdr, &hdr);
6627         if (status)
6628                 goto out;
6629         status = decode_sequence(xdr, &res->seq_res, rqstp);
6630         if (status)
6631                 goto out;
6632         status = decode_putfh(xdr);
6633         if (status)
6634                 goto out;
6635         status = decode_readdir(xdr, rqstp, res);
6636 out:
6637         return status;
6638 }
6639
6640 /*
6641  * Decode Read response
6642  */
6643 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6644                              struct nfs_pgio_res *res)
6645 {
6646         struct compound_hdr hdr;
6647         int status;
6648
6649         status = decode_compound_hdr(xdr, &hdr);
6650         if (status)
6651                 goto out;
6652         status = decode_sequence(xdr, &res->seq_res, rqstp);
6653         if (status)
6654                 goto out;
6655         status = decode_putfh(xdr);
6656         if (status)
6657                 goto out;
6658         status = decode_read(xdr, rqstp, res);
6659         if (!status)
6660                 status = res->count;
6661 out:
6662         return status;
6663 }
6664
6665 /*
6666  * Decode WRITE response
6667  */
6668 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6669                               struct nfs_pgio_res *res)
6670 {
6671         struct compound_hdr hdr;
6672         int status;
6673
6674         status = decode_compound_hdr(xdr, &hdr);
6675         if (status)
6676                 goto out;
6677         status = decode_sequence(xdr, &res->seq_res, rqstp);
6678         if (status)
6679                 goto out;
6680         status = decode_putfh(xdr);
6681         if (status)
6682                 goto out;
6683         status = decode_write(xdr, res);
6684         if (status)
6685                 goto out;
6686         if (res->fattr)
6687                 decode_getfattr(xdr, res->fattr, res->server);
6688         if (!status)
6689                 status = res->count;
6690 out:
6691         return status;
6692 }
6693
6694 /*
6695  * Decode COMMIT response
6696  */
6697 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6698                                struct nfs_commitres *res)
6699 {
6700         struct compound_hdr hdr;
6701         int status;
6702
6703         status = decode_compound_hdr(xdr, &hdr);
6704         if (status)
6705                 goto out;
6706         status = decode_sequence(xdr, &res->seq_res, rqstp);
6707         if (status)
6708                 goto out;
6709         status = decode_putfh(xdr);
6710         if (status)
6711                 goto out;
6712         status = decode_commit(xdr, res);
6713 out:
6714         return status;
6715 }
6716
6717 /*
6718  * Decode FSINFO response
6719  */
6720 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6721                                struct nfs4_fsinfo_res *res)
6722 {
6723         struct compound_hdr hdr;
6724         int status;
6725
6726         status = decode_compound_hdr(xdr, &hdr);
6727         if (!status)
6728                 status = decode_sequence(xdr, &res->seq_res, req);
6729         if (!status)
6730                 status = decode_putfh(xdr);
6731         if (!status)
6732                 status = decode_fsinfo(xdr, res->fsinfo);
6733         return status;
6734 }
6735
6736 /*
6737  * Decode PATHCONF response
6738  */
6739 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6740                                  struct nfs4_pathconf_res *res)
6741 {
6742         struct compound_hdr hdr;
6743         int status;
6744
6745         status = decode_compound_hdr(xdr, &hdr);
6746         if (!status)
6747                 status = decode_sequence(xdr, &res->seq_res, req);
6748         if (!status)
6749                 status = decode_putfh(xdr);
6750         if (!status)
6751                 status = decode_pathconf(xdr, res->pathconf);
6752         return status;
6753 }
6754
6755 /*
6756  * Decode STATFS response
6757  */
6758 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6759                                struct nfs4_statfs_res *res)
6760 {
6761         struct compound_hdr hdr;
6762         int status;
6763
6764         status = decode_compound_hdr(xdr, &hdr);
6765         if (!status)
6766                 status = decode_sequence(xdr, &res->seq_res, req);
6767         if (!status)
6768                 status = decode_putfh(xdr);
6769         if (!status)
6770                 status = decode_statfs(xdr, res->fsstat);
6771         return status;
6772 }
6773
6774 /*
6775  * Decode GETATTR_BITMAP response
6776  */
6777 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6778                                     struct xdr_stream *xdr,
6779                                     struct nfs4_server_caps_res *res)
6780 {
6781         struct compound_hdr hdr;
6782         int status;
6783
6784         status = decode_compound_hdr(xdr, &hdr);
6785         if (status)
6786                 goto out;
6787         status = decode_sequence(xdr, &res->seq_res, req);
6788         if (status)
6789                 goto out;
6790         status = decode_putfh(xdr);
6791         if (status)
6792                 goto out;
6793         status = decode_server_caps(xdr, res);
6794 out:
6795         return status;
6796 }
6797
6798 /*
6799  * Decode RENEW response
6800  */
6801 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6802                               void *__unused)
6803 {
6804         struct compound_hdr hdr;
6805         int status;
6806
6807         status = decode_compound_hdr(xdr, &hdr);
6808         if (!status)
6809                 status = decode_renew(xdr);
6810         return status;
6811 }
6812
6813 /*
6814  * Decode SETCLIENTID response
6815  */
6816 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6817                                     struct xdr_stream *xdr,
6818                                     struct nfs4_setclientid_res *res)
6819 {
6820         struct compound_hdr hdr;
6821         int status;
6822
6823         status = decode_compound_hdr(xdr, &hdr);
6824         if (!status)
6825                 status = decode_setclientid(xdr, res);
6826         return status;
6827 }
6828
6829 /*
6830  * Decode SETCLIENTID_CONFIRM response
6831  */
6832 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6833                                             struct xdr_stream *xdr)
6834 {
6835         struct compound_hdr hdr;
6836         int status;
6837
6838         status = decode_compound_hdr(xdr, &hdr);
6839         if (!status)
6840                 status = decode_setclientid_confirm(xdr);
6841         return status;
6842 }
6843
6844 /*
6845  * Decode DELEGRETURN response
6846  */
6847 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6848                                     struct xdr_stream *xdr,
6849                                     struct nfs4_delegreturnres *res)
6850 {
6851         struct compound_hdr hdr;
6852         int status;
6853
6854         status = decode_compound_hdr(xdr, &hdr);
6855         if (status)
6856                 goto out;
6857         status = decode_sequence(xdr, &res->seq_res, rqstp);
6858         if (status)
6859                 goto out;
6860         status = decode_putfh(xdr);
6861         if (status != 0)
6862                 goto out;
6863         status = decode_getfattr(xdr, res->fattr, res->server);
6864         if (status != 0)
6865                 goto out;
6866         status = decode_delegreturn(xdr);
6867 out:
6868         return status;
6869 }
6870
6871 /*
6872  * Decode FS_LOCATIONS response
6873  */
6874 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6875                                      struct xdr_stream *xdr,
6876                                      struct nfs4_fs_locations_res *res)
6877 {
6878         struct compound_hdr hdr;
6879         int status;
6880
6881         status = decode_compound_hdr(xdr, &hdr);
6882         if (status)
6883                 goto out;
6884         status = decode_sequence(xdr, &res->seq_res, req);
6885         if (status)
6886                 goto out;
6887         status = decode_putfh(xdr);
6888         if (status)
6889                 goto out;
6890         if (res->migration) {
6891                 xdr_enter_page(xdr, PAGE_SIZE);
6892                 status = decode_getfattr_generic(xdr,
6893                                         &res->fs_locations->fattr,
6894                                          NULL, res->fs_locations,
6895                                          NULL, res->fs_locations->server);
6896                 if (status)
6897                         goto out;
6898                 if (res->renew)
6899                         status = decode_renew(xdr);
6900         } else {
6901                 status = decode_lookup(xdr);
6902                 if (status)
6903                         goto out;
6904                 xdr_enter_page(xdr, PAGE_SIZE);
6905                 status = decode_getfattr_generic(xdr,
6906                                         &res->fs_locations->fattr,
6907                                          NULL, res->fs_locations,
6908                                          NULL, res->fs_locations->server);
6909         }
6910 out:
6911         return status;
6912 }
6913
6914 /*
6915  * Decode SECINFO response
6916  */
6917 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6918                                 struct xdr_stream *xdr,
6919                                 struct nfs4_secinfo_res *res)
6920 {
6921         struct compound_hdr hdr;
6922         int status;
6923
6924         status = decode_compound_hdr(xdr, &hdr);
6925         if (status)
6926                 goto out;
6927         status = decode_sequence(xdr, &res->seq_res, rqstp);
6928         if (status)
6929                 goto out;
6930         status = decode_putfh(xdr);
6931         if (status)
6932                 goto out;
6933         status = decode_secinfo(xdr, res);
6934 out:
6935         return status;
6936 }
6937
6938 /*
6939  * Decode FSID_PRESENT response
6940  */
6941 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6942                                      struct xdr_stream *xdr,
6943                                      struct nfs4_fsid_present_res *res)
6944 {
6945         struct compound_hdr hdr;
6946         int status;
6947
6948         status = decode_compound_hdr(xdr, &hdr);
6949         if (status)
6950                 goto out;
6951         status = decode_sequence(xdr, &res->seq_res, rqstp);
6952         if (status)
6953                 goto out;
6954         status = decode_putfh(xdr);
6955         if (status)
6956                 goto out;
6957         status = decode_getfh(xdr, res->fh);
6958         if (status)
6959                 goto out;
6960         if (res->renew)
6961                 status = decode_renew(xdr);
6962 out:
6963         return status;
6964 }
6965
6966 #if defined(CONFIG_NFS_V4_1)
6967 /*
6968  * Decode BIND_CONN_TO_SESSION response
6969  */
6970 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6971                                         struct xdr_stream *xdr,
6972                                         void *res)
6973 {
6974         struct compound_hdr hdr;
6975         int status;
6976
6977         status = decode_compound_hdr(xdr, &hdr);
6978         if (!status)
6979                 status = decode_bind_conn_to_session(xdr, res);
6980         return status;
6981 }
6982
6983 /*
6984  * Decode EXCHANGE_ID response
6985  */
6986 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6987                                     struct xdr_stream *xdr,
6988                                     void *res)
6989 {
6990         struct compound_hdr hdr;
6991         int status;
6992
6993         status = decode_compound_hdr(xdr, &hdr);
6994         if (!status)
6995                 status = decode_exchange_id(xdr, res);
6996         return status;
6997 }
6998
6999 /*
7000  * Decode CREATE_SESSION response
7001  */
7002 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7003                                        struct xdr_stream *xdr,
7004                                        struct nfs41_create_session_res *res)
7005 {
7006         struct compound_hdr hdr;
7007         int status;
7008
7009         status = decode_compound_hdr(xdr, &hdr);
7010         if (!status)
7011                 status = decode_create_session(xdr, res);
7012         return status;
7013 }
7014
7015 /*
7016  * Decode DESTROY_SESSION response
7017  */
7018 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7019                                         struct xdr_stream *xdr,
7020                                         void *res)
7021 {
7022         struct compound_hdr hdr;
7023         int status;
7024
7025         status = decode_compound_hdr(xdr, &hdr);
7026         if (!status)
7027                 status = decode_destroy_session(xdr, res);
7028         return status;
7029 }
7030
7031 /*
7032  * Decode DESTROY_CLIENTID response
7033  */
7034 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7035                                         struct xdr_stream *xdr,
7036                                         void *res)
7037 {
7038         struct compound_hdr hdr;
7039         int status;
7040
7041         status = decode_compound_hdr(xdr, &hdr);
7042         if (!status)
7043                 status = decode_destroy_clientid(xdr, res);
7044         return status;
7045 }
7046
7047 /*
7048  * Decode SEQUENCE response
7049  */
7050 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7051                                  struct xdr_stream *xdr,
7052                                  struct nfs4_sequence_res *res)
7053 {
7054         struct compound_hdr hdr;
7055         int status;
7056
7057         status = decode_compound_hdr(xdr, &hdr);
7058         if (!status)
7059                 status = decode_sequence(xdr, res, rqstp);
7060         return status;
7061 }
7062
7063 /*
7064  * Decode GET_LEASE_TIME response
7065  */
7066 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7067                                        struct xdr_stream *xdr,
7068                                        struct nfs4_get_lease_time_res *res)
7069 {
7070         struct compound_hdr hdr;
7071         int status;
7072
7073         status = decode_compound_hdr(xdr, &hdr);
7074         if (!status)
7075                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7076         if (!status)
7077                 status = decode_putrootfh(xdr);
7078         if (!status)
7079                 status = decode_fsinfo(xdr, res->lr_fsinfo);
7080         return status;
7081 }
7082
7083 /*
7084  * Decode RECLAIM_COMPLETE response
7085  */
7086 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7087                                          struct xdr_stream *xdr,
7088                                          struct nfs41_reclaim_complete_res *res)
7089 {
7090         struct compound_hdr hdr;
7091         int status;
7092
7093         status = decode_compound_hdr(xdr, &hdr);
7094         if (!status)
7095                 status = decode_sequence(xdr, &res->seq_res, rqstp);
7096         if (!status)
7097                 status = decode_reclaim_complete(xdr, (void *)NULL);
7098         return status;
7099 }
7100
7101 /*
7102  * Decode GETDEVICELIST response
7103  */
7104 static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
7105                                       struct xdr_stream *xdr,
7106                                       struct nfs4_getdevicelist_res *res)
7107 {
7108         struct compound_hdr hdr;
7109         int status;
7110
7111         dprintk("encoding getdevicelist!\n");
7112
7113         status = decode_compound_hdr(xdr, &hdr);
7114         if (status != 0)
7115                 goto out;
7116         status = decode_sequence(xdr, &res->seq_res, rqstp);
7117         if (status != 0)
7118                 goto out;
7119         status = decode_putfh(xdr);
7120         if (status != 0)
7121                 goto out;
7122         status = decode_getdevicelist(xdr, res->devlist);
7123 out:
7124         return status;
7125 }
7126
7127 /*
7128  * Decode GETDEVINFO response
7129  */
7130 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7131                                       struct xdr_stream *xdr,
7132                                       struct nfs4_getdeviceinfo_res *res)
7133 {
7134         struct compound_hdr hdr;
7135         int status;
7136
7137         status = decode_compound_hdr(xdr, &hdr);
7138         if (status != 0)
7139                 goto out;
7140         status = decode_sequence(xdr, &res->seq_res, rqstp);
7141         if (status != 0)
7142                 goto out;
7143         status = decode_getdeviceinfo(xdr, res->pdev);
7144 out:
7145         return status;
7146 }
7147
7148 /*
7149  * Decode LAYOUTGET response
7150  */
7151 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7152                                   struct xdr_stream *xdr,
7153                                   struct nfs4_layoutget_res *res)
7154 {
7155         struct compound_hdr hdr;
7156         int status;
7157
7158         status = decode_compound_hdr(xdr, &hdr);
7159         if (status)
7160                 goto out;
7161         status = decode_sequence(xdr, &res->seq_res, rqstp);
7162         if (status)
7163                 goto out;
7164         status = decode_putfh(xdr);
7165         if (status)
7166                 goto out;
7167         status = decode_layoutget(xdr, rqstp, res);
7168 out:
7169         return status;
7170 }
7171
7172 /*
7173  * Decode LAYOUTRETURN response
7174  */
7175 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7176                                      struct xdr_stream *xdr,
7177                                      struct nfs4_layoutreturn_res *res)
7178 {
7179         struct compound_hdr hdr;
7180         int status;
7181
7182         status = decode_compound_hdr(xdr, &hdr);
7183         if (status)
7184                 goto out;
7185         status = decode_sequence(xdr, &res->seq_res, rqstp);
7186         if (status)
7187                 goto out;
7188         status = decode_putfh(xdr);
7189         if (status)
7190                 goto out;
7191         status = decode_layoutreturn(xdr, res);
7192 out:
7193         return status;
7194 }
7195
7196 /*
7197  * Decode LAYOUTCOMMIT response
7198  */
7199 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7200                                      struct xdr_stream *xdr,
7201                                      struct nfs4_layoutcommit_res *res)
7202 {
7203         struct compound_hdr hdr;
7204         int status;
7205
7206         status = decode_compound_hdr(xdr, &hdr);
7207         if (status)
7208                 goto out;
7209         status = decode_sequence(xdr, &res->seq_res, rqstp);
7210         if (status)
7211                 goto out;
7212         status = decode_putfh(xdr);
7213         if (status)
7214                 goto out;
7215         status = decode_layoutcommit(xdr, rqstp, res);
7216         if (status)
7217                 goto out;
7218         decode_getfattr(xdr, res->fattr, res->server);
7219 out:
7220         return status;
7221 }
7222
7223 /*
7224  * Decode SECINFO_NO_NAME response
7225  */
7226 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7227                                         struct xdr_stream *xdr,
7228                                         struct nfs4_secinfo_res *res)
7229 {
7230         struct compound_hdr hdr;
7231         int status;
7232
7233         status = decode_compound_hdr(xdr, &hdr);
7234         if (status)
7235                 goto out;
7236         status = decode_sequence(xdr, &res->seq_res, rqstp);
7237         if (status)
7238                 goto out;
7239         status = decode_putrootfh(xdr);
7240         if (status)
7241                 goto out;
7242         status = decode_secinfo_no_name(xdr, res);
7243 out:
7244         return status;
7245 }
7246
7247 /*
7248  * Decode TEST_STATEID response
7249  */
7250 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7251                                      struct xdr_stream *xdr,
7252                                      struct nfs41_test_stateid_res *res)
7253 {
7254         struct compound_hdr hdr;
7255         int status;
7256
7257         status = decode_compound_hdr(xdr, &hdr);
7258         if (status)
7259                 goto out;
7260         status = decode_sequence(xdr, &res->seq_res, rqstp);
7261         if (status)
7262                 goto out;
7263         status = decode_test_stateid(xdr, res);
7264 out:
7265         return status;
7266 }
7267
7268 /*
7269  * Decode FREE_STATEID response
7270  */
7271 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7272                                      struct xdr_stream *xdr,
7273                                      struct nfs41_free_stateid_res *res)
7274 {
7275         struct compound_hdr hdr;
7276         int status;
7277
7278         status = decode_compound_hdr(xdr, &hdr);
7279         if (status)
7280                 goto out;
7281         status = decode_sequence(xdr, &res->seq_res, rqstp);
7282         if (status)
7283                 goto out;
7284         status = decode_free_stateid(xdr, res);
7285 out:
7286         return status;
7287 }
7288 #endif /* CONFIG_NFS_V4_1 */
7289
7290 /**
7291  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7292  *                      the local page cache.
7293  * @xdr: XDR stream where entry resides
7294  * @entry: buffer to fill in with entry data
7295  * @plus: boolean indicating whether this should be a readdirplus entry
7296  *
7297  * Returns zero if successful, otherwise a negative errno value is
7298  * returned.
7299  *
7300  * This function is not invoked during READDIR reply decoding, but
7301  * rather whenever an application invokes the getdents(2) system call
7302  * on a directory already in our cache.
7303  */
7304 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7305                        int plus)
7306 {
7307         unsigned int savep;
7308         uint32_t bitmap[3] = {0};
7309         uint32_t len;
7310         __be32 *p = xdr_inline_decode(xdr, 4);
7311         if (unlikely(!p))
7312                 goto out_overflow;
7313         if (*p == xdr_zero) {
7314                 p = xdr_inline_decode(xdr, 4);
7315                 if (unlikely(!p))
7316                         goto out_overflow;
7317                 if (*p == xdr_zero)
7318                         return -EAGAIN;
7319                 entry->eof = 1;
7320                 return -EBADCOOKIE;
7321         }
7322
7323         p = xdr_inline_decode(xdr, 12);
7324         if (unlikely(!p))
7325                 goto out_overflow;
7326         entry->prev_cookie = entry->cookie;
7327         p = xdr_decode_hyper(p, &entry->cookie);
7328         entry->len = be32_to_cpup(p);
7329
7330         p = xdr_inline_decode(xdr, entry->len);
7331         if (unlikely(!p))
7332                 goto out_overflow;
7333         entry->name = (const char *) p;
7334
7335         /*
7336          * In case the server doesn't return an inode number,
7337          * we fake one here.  (We don't use inode number 0,
7338          * since glibc seems to choke on it...)
7339          */
7340         entry->ino = 1;
7341         entry->fattr->valid = 0;
7342
7343         if (decode_attr_bitmap(xdr, bitmap) < 0)
7344                 goto out_overflow;
7345
7346         if (decode_attr_length(xdr, &len, &savep) < 0)
7347                 goto out_overflow;
7348
7349         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7350                         NULL, entry->label, entry->server) < 0)
7351                 goto out_overflow;
7352         if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7353                 entry->ino = entry->fattr->mounted_on_fileid;
7354         else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7355                 entry->ino = entry->fattr->fileid;
7356
7357         entry->d_type = DT_UNKNOWN;
7358         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7359                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7360
7361         return 0;
7362
7363 out_overflow:
7364         print_overflow_msg(__func__, xdr);
7365         return -EAGAIN;
7366 }
7367
7368 /*
7369  * We need to translate between nfs status return values and
7370  * the local errno values which may not be the same.
7371  */
7372 static struct {
7373         int stat;
7374         int errno;
7375 } nfs_errtbl[] = {
7376         { NFS4_OK,              0               },
7377         { NFS4ERR_PERM,         -EPERM          },
7378         { NFS4ERR_NOENT,        -ENOENT         },
7379         { NFS4ERR_IO,           -errno_NFSERR_IO},
7380         { NFS4ERR_NXIO,         -ENXIO          },
7381         { NFS4ERR_ACCESS,       -EACCES         },
7382         { NFS4ERR_EXIST,        -EEXIST         },
7383         { NFS4ERR_XDEV,         -EXDEV          },
7384         { NFS4ERR_NOTDIR,       -ENOTDIR        },
7385         { NFS4ERR_ISDIR,        -EISDIR         },
7386         { NFS4ERR_INVAL,        -EINVAL         },
7387         { NFS4ERR_FBIG,         -EFBIG          },
7388         { NFS4ERR_NOSPC,        -ENOSPC         },
7389         { NFS4ERR_ROFS,         -EROFS          },
7390         { NFS4ERR_MLINK,        -EMLINK         },
7391         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
7392         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
7393         { NFS4ERR_DQUOT,        -EDQUOT         },
7394         { NFS4ERR_STALE,        -ESTALE         },
7395         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
7396         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
7397         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
7398         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
7399         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
7400         { NFS4ERR_BADTYPE,      -EBADTYPE       },
7401         { NFS4ERR_LOCKED,       -EAGAIN         },
7402         { NFS4ERR_SYMLINK,      -ELOOP          },
7403         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
7404         { NFS4ERR_DEADLOCK,     -EDEADLK        },
7405         { -1,                   -EIO            }
7406 };
7407
7408 /*
7409  * Convert an NFS error code to a local one.
7410  * This one is used jointly by NFSv2 and NFSv3.
7411  */
7412 static int
7413 nfs4_stat_to_errno(int stat)
7414 {
7415         int i;
7416         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7417                 if (nfs_errtbl[i].stat == stat)
7418                         return nfs_errtbl[i].errno;
7419         }
7420         if (stat <= 10000 || stat > 10100) {
7421                 /* The server is looney tunes. */
7422                 return -EREMOTEIO;
7423         }
7424         /* If we cannot translate the error, the recovery routines should
7425          * handle it.
7426          * Note: remaining NFSv4 error codes have values > 10000, so should
7427          * not conflict with native Linux error codes.
7428          */
7429         return -stat;
7430 }
7431
7432 #define PROC(proc, argtype, restype)                            \
7433 [NFSPROC4_CLNT_##proc] = {                                      \
7434         .p_proc   = NFSPROC4_COMPOUND,                          \
7435         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
7436         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
7437         .p_arglen = NFS4_##argtype##_sz,                        \
7438         .p_replen = NFS4_##restype##_sz,                        \
7439         .p_statidx = NFSPROC4_CLNT_##proc,                      \
7440         .p_name   = #proc,                                      \
7441 }
7442
7443 struct rpc_procinfo     nfs4_procedures[] = {
7444         PROC(READ,              enc_read,               dec_read),
7445         PROC(WRITE,             enc_write,              dec_write),
7446         PROC(COMMIT,            enc_commit,             dec_commit),
7447         PROC(OPEN,              enc_open,               dec_open),
7448         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
7449         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
7450         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
7451         PROC(CLOSE,             enc_close,              dec_close),
7452         PROC(SETATTR,           enc_setattr,            dec_setattr),
7453         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
7454         PROC(RENEW,             enc_renew,              dec_renew),
7455         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
7456         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7457         PROC(LOCK,              enc_lock,               dec_lock),
7458         PROC(LOCKT,             enc_lockt,              dec_lockt),
7459         PROC(LOCKU,             enc_locku,              dec_locku),
7460         PROC(ACCESS,            enc_access,             dec_access),
7461         PROC(GETATTR,           enc_getattr,            dec_getattr),
7462         PROC(LOOKUP,            enc_lookup,             dec_lookup),
7463         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
7464         PROC(REMOVE,            enc_remove,             dec_remove),
7465         PROC(RENAME,            enc_rename,             dec_rename),
7466         PROC(LINK,              enc_link,               dec_link),
7467         PROC(SYMLINK,           enc_symlink,            dec_symlink),
7468         PROC(CREATE,            enc_create,             dec_create),
7469         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
7470         PROC(STATFS,            enc_statfs,             dec_statfs),
7471         PROC(READLINK,          enc_readlink,           dec_readlink),
7472         PROC(READDIR,           enc_readdir,            dec_readdir),
7473         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
7474         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
7475         PROC(GETACL,            enc_getacl,             dec_getacl),
7476         PROC(SETACL,            enc_setacl,             dec_setacl),
7477         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
7478         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
7479         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
7480         PROC(FSID_PRESENT,      enc_fsid_present,       dec_fsid_present),
7481 #if defined(CONFIG_NFS_V4_1)
7482         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
7483         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
7484         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
7485         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
7486         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
7487         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
7488         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
7489         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
7490         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
7491         PROC(LAYOUTRETURN,      enc_layoutreturn,       dec_layoutreturn),
7492         PROC(SECINFO_NO_NAME,   enc_secinfo_no_name,    dec_secinfo_no_name),
7493         PROC(TEST_STATEID,      enc_test_stateid,       dec_test_stateid),
7494         PROC(FREE_STATEID,      enc_free_stateid,       dec_free_stateid),
7495         PROC(GETDEVICELIST,     enc_getdevicelist,      dec_getdevicelist),
7496         PROC(BIND_CONN_TO_SESSION,
7497                         enc_bind_conn_to_session, dec_bind_conn_to_session),
7498         PROC(DESTROY_CLIENTID,  enc_destroy_clientid,   dec_destroy_clientid),
7499 #endif /* CONFIG_NFS_V4_1 */
7500 };
7501
7502 const struct rpc_version nfs_version4 = {
7503         .number                 = 4,
7504         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
7505         .procs                  = nfs4_procedures
7506 };
7507
7508 /*
7509  * Local variables:
7510  *  c-basic-offset: 8
7511  * End:
7512  */