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/slab.h> 42 #include <linux/utsname.h> 43 #include <linux/errno.h> 44 #include <linux/string.h> 45 #include <linux/in.h> 46 #include <linux/pagemap.h> 47 #include <linux/proc_fs.h> 48 #include <linux/kdev_t.h> 49 #include <linux/sunrpc/clnt.h> 50 #include <linux/nfs.h> 51 #include <linux/nfs4.h> 52 #include <linux/nfs_fs.h> 53 #include <linux/nfs_idmap.h> 54 #include "nfs4_fs.h" 55 56 #define NFSDBG_FACILITY NFSDBG_XDR 57 58 /* Mapping from NFS error code to "errno" error code. */ 59 #define errno_NFSERR_IO EIO 60 61 static int nfs4_stat_to_errno(int); 62 63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */ 64 #ifdef DEBUG 65 #define NFS4_MAXTAGLEN 20 66 #else 67 #define NFS4_MAXTAGLEN 0 68 #endif 69 70 /* lock,open owner id: 71 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2) 72 */ 73 #define open_owner_id_maxsz (1 + 4) 74 #define lock_owner_id_maxsz (1 + 4) 75 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 76 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) 77 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) 78 #define op_encode_hdr_maxsz (1) 79 #define op_decode_hdr_maxsz (2) 80 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 81 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 82 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 83 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 84 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \ 85 (NFS4_FHSIZE >> 2)) 86 #define decode_putfh_maxsz (op_decode_hdr_maxsz) 87 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz) 88 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz) 89 #define encode_getfh_maxsz (op_encode_hdr_maxsz) 90 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \ 91 ((3+NFS4_FHSIZE) >> 2)) 92 #define nfs4_fattr_bitmap_maxsz 3 93 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz) 94 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2)) 95 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2)) 96 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 97 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 98 /* This is based on getfattr, which uses the most attributes: */ 99 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \ 100 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz)) 101 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \ 102 nfs4_fattr_value_maxsz) 103 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz) 104 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \ 105 1 + 2 + 1 + \ 106 nfs4_owner_maxsz + \ 107 nfs4_group_maxsz + \ 108 4 + 4) 109 #define encode_savefh_maxsz (op_encode_hdr_maxsz) 110 #define decode_savefh_maxsz (op_decode_hdr_maxsz) 111 #define encode_restorefh_maxsz (op_encode_hdr_maxsz) 112 #define decode_restorefh_maxsz (op_decode_hdr_maxsz) 113 #define encode_fsinfo_maxsz (encode_getattr_maxsz) 114 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11) 115 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3) 116 #define decode_renew_maxsz (op_decode_hdr_maxsz) 117 #define encode_setclientid_maxsz \ 118 (op_encode_hdr_maxsz + \ 119 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \ 120 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \ 121 1 /* sc_prog */ + \ 122 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \ 123 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \ 124 1) /* sc_cb_ident */ 125 #define decode_setclientid_maxsz \ 126 (op_decode_hdr_maxsz + \ 127 2 + \ 128 1024) /* large value for CLID_INUSE */ 129 #define encode_setclientid_confirm_maxsz \ 130 (op_encode_hdr_maxsz + \ 131 3 + (NFS4_VERIFIER_SIZE >> 2)) 132 #define decode_setclientid_confirm_maxsz \ 133 (op_decode_hdr_maxsz) 134 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz) 135 #define decode_lookup_maxsz (op_decode_hdr_maxsz) 136 #define encode_share_access_maxsz \ 137 (2) 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz) 139 #define encode_opentype_maxsz (1 + encode_createmode_maxsz) 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz) 141 #define encode_open_maxsz (op_encode_hdr_maxsz + \ 142 2 + encode_share_access_maxsz + 2 + \ 143 open_owner_id_maxsz + \ 144 encode_opentype_maxsz + \ 145 encode_claim_null_maxsz) 146 #define decode_ace_maxsz (3 + nfs4_owner_maxsz) 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \ 148 decode_ace_maxsz) 149 #define decode_change_info_maxsz (5) 150 #define decode_open_maxsz (op_decode_hdr_maxsz + \ 151 decode_stateid_maxsz + \ 152 decode_change_info_maxsz + 1 + \ 153 nfs4_fattr_bitmap_maxsz + \ 154 decode_delegation_maxsz) 155 #define encode_open_confirm_maxsz \ 156 (op_encode_hdr_maxsz + \ 157 encode_stateid_maxsz + 1) 158 #define decode_open_confirm_maxsz \ 159 (op_decode_hdr_maxsz + \ 160 decode_stateid_maxsz) 161 #define encode_open_downgrade_maxsz \ 162 (op_encode_hdr_maxsz + \ 163 encode_stateid_maxsz + 1 + \ 164 encode_share_access_maxsz) 165 #define decode_open_downgrade_maxsz \ 166 (op_decode_hdr_maxsz + \ 167 decode_stateid_maxsz) 168 #define encode_close_maxsz (op_encode_hdr_maxsz + \ 169 1 + encode_stateid_maxsz) 170 #define decode_close_maxsz (op_decode_hdr_maxsz + \ 171 decode_stateid_maxsz) 172 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \ 173 encode_stateid_maxsz + \ 174 encode_attrs_maxsz) 175 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \ 176 nfs4_fattr_bitmap_maxsz) 177 #define encode_read_maxsz (op_encode_hdr_maxsz + \ 178 encode_stateid_maxsz + 3) 179 #define decode_read_maxsz (op_decode_hdr_maxsz + 2) 180 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \ 181 2 + encode_verifier_maxsz + 5) 182 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \ 183 decode_verifier_maxsz) 184 #define encode_readlink_maxsz (op_encode_hdr_maxsz) 185 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1) 186 #define encode_write_maxsz (op_encode_hdr_maxsz + \ 187 encode_stateid_maxsz + 4) 188 #define decode_write_maxsz (op_decode_hdr_maxsz + \ 189 2 + decode_verifier_maxsz) 190 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3) 191 #define decode_commit_maxsz (op_decode_hdr_maxsz + \ 192 decode_verifier_maxsz) 193 #define encode_remove_maxsz (op_encode_hdr_maxsz + \ 194 nfs4_name_maxsz) 195 #define decode_remove_maxsz (op_decode_hdr_maxsz + \ 196 decode_change_info_maxsz) 197 #define encode_rename_maxsz (op_encode_hdr_maxsz + \ 198 2 * nfs4_name_maxsz) 199 #define decode_rename_maxsz (op_decode_hdr_maxsz + \ 200 decode_change_info_maxsz + \ 201 decode_change_info_maxsz) 202 #define encode_link_maxsz (op_encode_hdr_maxsz + \ 203 nfs4_name_maxsz) 204 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz) 205 #define encode_lock_maxsz (op_encode_hdr_maxsz + \ 206 7 + \ 207 1 + encode_stateid_maxsz + 8) 208 #define decode_lock_denied_maxsz \ 209 (8 + decode_lockowner_maxsz) 210 #define decode_lock_maxsz (op_decode_hdr_maxsz + \ 211 decode_lock_denied_maxsz) 212 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 12) 213 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \ 214 decode_lock_denied_maxsz) 215 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \ 216 encode_stateid_maxsz + \ 217 4) 218 #define decode_locku_maxsz (op_decode_hdr_maxsz + \ 219 decode_stateid_maxsz) 220 #define encode_access_maxsz (op_encode_hdr_maxsz + 1) 221 #define decode_access_maxsz (op_decode_hdr_maxsz + 2) 222 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \ 223 1 + nfs4_name_maxsz + \ 224 1 + \ 225 nfs4_fattr_maxsz) 226 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8) 227 #define encode_create_maxsz (op_encode_hdr_maxsz + \ 228 1 + 2 + nfs4_name_maxsz + \ 229 encode_attrs_maxsz) 230 #define decode_create_maxsz (op_decode_hdr_maxsz + \ 231 decode_change_info_maxsz + \ 232 nfs4_fattr_bitmap_maxsz) 233 #define encode_statfs_maxsz (encode_getattr_maxsz) 234 #define decode_statfs_maxsz (decode_getattr_maxsz) 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4) 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz) 237 #define encode_getacl_maxsz (encode_getattr_maxsz) 238 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \ 239 nfs4_fattr_bitmap_maxsz + 1) 240 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \ 241 encode_stateid_maxsz + 3) 242 #define decode_setacl_maxsz (decode_setattr_maxsz) 243 #define encode_fs_locations_maxsz \ 244 (encode_getattr_maxsz) 245 #define decode_fs_locations_maxsz \ 246 (0) 247 248 #if defined(CONFIG_NFS_V4_1) 249 #define NFS4_MAX_MACHINE_NAME_LEN (64) 250 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \ 252 encode_verifier_maxsz + \ 253 1 /* co_ownerid.len */ + \ 254 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \ 255 1 /* flags */ + \ 256 1 /* spa_how */ + \ 257 0 /* SP4_NONE (for now) */ + \ 258 1 /* zero implemetation id array */) 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \ 260 2 /* eir_clientid */ + \ 261 1 /* eir_sequenceid */ + \ 262 1 /* eir_flags */ + \ 263 1 /* spr_how */ + \ 264 0 /* SP4_NONE (for now) */ + \ 265 2 /* eir_server_owner.so_minor_id */ + \ 266 /* eir_server_owner.so_major_id<> */ \ 267 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ 268 /* eir_server_scope<> */ \ 269 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ 270 1 /* eir_server_impl_id array length */ + \ 271 0 /* ignored eir_server_impl_id contents */) 272 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */) 273 #define decode_channel_attrs_maxsz (6 + \ 274 1 /* ca_rdma_ird.len */ + \ 275 1 /* ca_rdma_ird */) 276 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \ 277 2 /* csa_clientid */ + \ 278 1 /* csa_sequence */ + \ 279 1 /* csa_flags */ + \ 280 encode_channel_attrs_maxsz + \ 281 encode_channel_attrs_maxsz + \ 282 1 /* csa_cb_program */ + \ 283 1 /* csa_sec_parms.len (1) */ + \ 284 1 /* cb_secflavor (AUTH_SYS) */ + \ 285 1 /* stamp */ + \ 286 1 /* machinename.len */ + \ 287 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \ 288 1 /* uid */ + \ 289 1 /* gid */ + \ 290 1 /* gids.len (0) */) 291 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \ 292 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 293 1 /* csr_sequence */ + \ 294 1 /* csr_flags */ + \ 295 decode_channel_attrs_maxsz + \ 296 decode_channel_attrs_maxsz) 297 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4) 298 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz) 299 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \ 300 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4) 301 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \ 302 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) 303 #else /* CONFIG_NFS_V4_1 */ 304 #define encode_sequence_maxsz 0 305 #define decode_sequence_maxsz 0 306 #endif /* CONFIG_NFS_V4_1 */ 307 308 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */ 309 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */ 310 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \ 311 encode_sequence_maxsz + \ 312 encode_putfh_maxsz + \ 313 encode_read_maxsz) 314 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \ 315 decode_sequence_maxsz + \ 316 decode_putfh_maxsz + \ 317 decode_read_maxsz) 318 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \ 319 encode_sequence_maxsz + \ 320 encode_putfh_maxsz + \ 321 encode_readlink_maxsz) 322 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \ 323 decode_sequence_maxsz + \ 324 decode_putfh_maxsz + \ 325 decode_readlink_maxsz) 326 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \ 327 encode_sequence_maxsz + \ 328 encode_putfh_maxsz + \ 329 encode_readdir_maxsz) 330 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \ 331 decode_sequence_maxsz + \ 332 decode_putfh_maxsz + \ 333 decode_readdir_maxsz) 334 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \ 335 encode_sequence_maxsz + \ 336 encode_putfh_maxsz + \ 337 encode_write_maxsz + \ 338 encode_getattr_maxsz) 339 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \ 340 decode_sequence_maxsz + \ 341 decode_putfh_maxsz + \ 342 decode_write_maxsz + \ 343 decode_getattr_maxsz) 344 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \ 345 encode_sequence_maxsz + \ 346 encode_putfh_maxsz + \ 347 encode_commit_maxsz + \ 348 encode_getattr_maxsz) 349 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \ 350 decode_sequence_maxsz + \ 351 decode_putfh_maxsz + \ 352 decode_commit_maxsz + \ 353 decode_getattr_maxsz) 354 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \ 355 encode_sequence_maxsz + \ 356 encode_putfh_maxsz + \ 357 encode_savefh_maxsz + \ 358 encode_open_maxsz + \ 359 encode_getfh_maxsz + \ 360 encode_getattr_maxsz + \ 361 encode_restorefh_maxsz + \ 362 encode_getattr_maxsz) 363 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \ 364 decode_sequence_maxsz + \ 365 decode_putfh_maxsz + \ 366 decode_savefh_maxsz + \ 367 decode_open_maxsz + \ 368 decode_getfh_maxsz + \ 369 decode_getattr_maxsz + \ 370 decode_restorefh_maxsz + \ 371 decode_getattr_maxsz) 372 #define NFS4_enc_open_confirm_sz \ 373 (compound_encode_hdr_maxsz + \ 374 encode_putfh_maxsz + \ 375 encode_open_confirm_maxsz) 376 #define NFS4_dec_open_confirm_sz \ 377 (compound_decode_hdr_maxsz + \ 378 decode_putfh_maxsz + \ 379 decode_open_confirm_maxsz) 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \ 381 encode_sequence_maxsz + \ 382 encode_putfh_maxsz + \ 383 encode_open_maxsz + \ 384 encode_getattr_maxsz) 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \ 386 decode_sequence_maxsz + \ 387 decode_putfh_maxsz + \ 388 decode_open_maxsz + \ 389 decode_getattr_maxsz) 390 #define NFS4_enc_open_downgrade_sz \ 391 (compound_encode_hdr_maxsz + \ 392 encode_sequence_maxsz + \ 393 encode_putfh_maxsz + \ 394 encode_open_downgrade_maxsz + \ 395 encode_getattr_maxsz) 396 #define NFS4_dec_open_downgrade_sz \ 397 (compound_decode_hdr_maxsz + \ 398 decode_sequence_maxsz + \ 399 decode_putfh_maxsz + \ 400 decode_open_downgrade_maxsz + \ 401 decode_getattr_maxsz) 402 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \ 403 encode_sequence_maxsz + \ 404 encode_putfh_maxsz + \ 405 encode_close_maxsz + \ 406 encode_getattr_maxsz) 407 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \ 408 decode_sequence_maxsz + \ 409 decode_putfh_maxsz + \ 410 decode_close_maxsz + \ 411 decode_getattr_maxsz) 412 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \ 413 encode_sequence_maxsz + \ 414 encode_putfh_maxsz + \ 415 encode_setattr_maxsz + \ 416 encode_getattr_maxsz) 417 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \ 418 decode_sequence_maxsz + \ 419 decode_putfh_maxsz + \ 420 decode_setattr_maxsz + \ 421 decode_getattr_maxsz) 422 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \ 423 encode_sequence_maxsz + \ 424 encode_putfh_maxsz + \ 425 encode_fsinfo_maxsz) 426 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \ 427 decode_sequence_maxsz + \ 428 decode_putfh_maxsz + \ 429 decode_fsinfo_maxsz) 430 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \ 431 encode_renew_maxsz) 432 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \ 433 decode_renew_maxsz) 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \ 435 encode_setclientid_maxsz) 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \ 437 decode_setclientid_maxsz) 438 #define NFS4_enc_setclientid_confirm_sz \ 439 (compound_encode_hdr_maxsz + \ 440 encode_setclientid_confirm_maxsz + \ 441 encode_putrootfh_maxsz + \ 442 encode_fsinfo_maxsz) 443 #define NFS4_dec_setclientid_confirm_sz \ 444 (compound_decode_hdr_maxsz + \ 445 decode_setclientid_confirm_maxsz + \ 446 decode_putrootfh_maxsz + \ 447 decode_fsinfo_maxsz) 448 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \ 449 encode_sequence_maxsz + \ 450 encode_putfh_maxsz + \ 451 encode_lock_maxsz) 452 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \ 453 decode_sequence_maxsz + \ 454 decode_putfh_maxsz + \ 455 decode_lock_maxsz) 456 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \ 457 encode_sequence_maxsz + \ 458 encode_putfh_maxsz + \ 459 encode_lockt_maxsz) 460 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \ 461 decode_sequence_maxsz + \ 462 decode_putfh_maxsz + \ 463 decode_lockt_maxsz) 464 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \ 465 encode_sequence_maxsz + \ 466 encode_putfh_maxsz + \ 467 encode_locku_maxsz) 468 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \ 469 decode_sequence_maxsz + \ 470 decode_putfh_maxsz + \ 471 decode_locku_maxsz) 472 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \ 473 encode_sequence_maxsz + \ 474 encode_putfh_maxsz + \ 475 encode_access_maxsz + \ 476 encode_getattr_maxsz) 477 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \ 478 decode_sequence_maxsz + \ 479 decode_putfh_maxsz + \ 480 decode_access_maxsz + \ 481 decode_getattr_maxsz) 482 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \ 483 encode_sequence_maxsz + \ 484 encode_putfh_maxsz + \ 485 encode_getattr_maxsz) 486 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \ 487 decode_sequence_maxsz + \ 488 decode_putfh_maxsz + \ 489 decode_getattr_maxsz) 490 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \ 491 encode_sequence_maxsz + \ 492 encode_putfh_maxsz + \ 493 encode_lookup_maxsz + \ 494 encode_getattr_maxsz + \ 495 encode_getfh_maxsz) 496 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \ 497 decode_sequence_maxsz + \ 498 decode_putfh_maxsz + \ 499 decode_lookup_maxsz + \ 500 decode_getattr_maxsz + \ 501 decode_getfh_maxsz) 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \ 503 encode_sequence_maxsz + \ 504 encode_putrootfh_maxsz + \ 505 encode_getattr_maxsz + \ 506 encode_getfh_maxsz) 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \ 508 decode_sequence_maxsz + \ 509 decode_putrootfh_maxsz + \ 510 decode_getattr_maxsz + \ 511 decode_getfh_maxsz) 512 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \ 513 encode_sequence_maxsz + \ 514 encode_putfh_maxsz + \ 515 encode_remove_maxsz + \ 516 encode_getattr_maxsz) 517 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \ 518 decode_sequence_maxsz + \ 519 decode_putfh_maxsz + \ 520 decode_remove_maxsz + \ 521 decode_getattr_maxsz) 522 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \ 523 encode_sequence_maxsz + \ 524 encode_putfh_maxsz + \ 525 encode_savefh_maxsz + \ 526 encode_putfh_maxsz + \ 527 encode_rename_maxsz + \ 528 encode_getattr_maxsz + \ 529 encode_restorefh_maxsz + \ 530 encode_getattr_maxsz) 531 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \ 532 decode_sequence_maxsz + \ 533 decode_putfh_maxsz + \ 534 decode_savefh_maxsz + \ 535 decode_putfh_maxsz + \ 536 decode_rename_maxsz + \ 537 decode_getattr_maxsz + \ 538 decode_restorefh_maxsz + \ 539 decode_getattr_maxsz) 540 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \ 541 encode_sequence_maxsz + \ 542 encode_putfh_maxsz + \ 543 encode_savefh_maxsz + \ 544 encode_putfh_maxsz + \ 545 encode_link_maxsz + \ 546 decode_getattr_maxsz + \ 547 encode_restorefh_maxsz + \ 548 decode_getattr_maxsz) 549 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \ 550 decode_sequence_maxsz + \ 551 decode_putfh_maxsz + \ 552 decode_savefh_maxsz + \ 553 decode_putfh_maxsz + \ 554 decode_link_maxsz + \ 555 decode_getattr_maxsz + \ 556 decode_restorefh_maxsz + \ 557 decode_getattr_maxsz) 558 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \ 559 encode_sequence_maxsz + \ 560 encode_putfh_maxsz + \ 561 encode_symlink_maxsz + \ 562 encode_getattr_maxsz + \ 563 encode_getfh_maxsz) 564 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \ 565 decode_sequence_maxsz + \ 566 decode_putfh_maxsz + \ 567 decode_symlink_maxsz + \ 568 decode_getattr_maxsz + \ 569 decode_getfh_maxsz) 570 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \ 571 encode_sequence_maxsz + \ 572 encode_putfh_maxsz + \ 573 encode_savefh_maxsz + \ 574 encode_create_maxsz + \ 575 encode_getfh_maxsz + \ 576 encode_getattr_maxsz + \ 577 encode_restorefh_maxsz + \ 578 encode_getattr_maxsz) 579 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \ 580 decode_sequence_maxsz + \ 581 decode_putfh_maxsz + \ 582 decode_savefh_maxsz + \ 583 decode_create_maxsz + \ 584 decode_getfh_maxsz + \ 585 decode_getattr_maxsz + \ 586 decode_restorefh_maxsz + \ 587 decode_getattr_maxsz) 588 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \ 589 encode_sequence_maxsz + \ 590 encode_putfh_maxsz + \ 591 encode_getattr_maxsz) 592 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \ 593 decode_sequence_maxsz + \ 594 decode_putfh_maxsz + \ 595 decode_getattr_maxsz) 596 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \ 597 encode_sequence_maxsz + \ 598 encode_putfh_maxsz + \ 599 encode_statfs_maxsz) 600 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \ 601 decode_sequence_maxsz + \ 602 decode_putfh_maxsz + \ 603 decode_statfs_maxsz) 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \ 605 encode_sequence_maxsz + \ 606 encode_putfh_maxsz + \ 607 encode_getattr_maxsz) 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \ 609 decode_sequence_maxsz + \ 610 decode_putfh_maxsz + \ 611 decode_getattr_maxsz) 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \ 613 encode_sequence_maxsz + \ 614 encode_putfh_maxsz + \ 615 encode_delegreturn_maxsz + \ 616 encode_getattr_maxsz) 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \ 618 decode_sequence_maxsz + \ 619 decode_delegreturn_maxsz + \ 620 decode_getattr_maxsz) 621 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \ 622 encode_sequence_maxsz + \ 623 encode_putfh_maxsz + \ 624 encode_getacl_maxsz) 625 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \ 626 decode_sequence_maxsz + \ 627 decode_putfh_maxsz + \ 628 decode_getacl_maxsz) 629 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \ 630 encode_sequence_maxsz + \ 631 encode_putfh_maxsz + \ 632 encode_setacl_maxsz) 633 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \ 634 decode_sequence_maxsz + \ 635 decode_putfh_maxsz + \ 636 decode_setacl_maxsz) 637 #define NFS4_enc_fs_locations_sz \ 638 (compound_encode_hdr_maxsz + \ 639 encode_sequence_maxsz + \ 640 encode_putfh_maxsz + \ 641 encode_lookup_maxsz + \ 642 encode_fs_locations_maxsz) 643 #define NFS4_dec_fs_locations_sz \ 644 (compound_decode_hdr_maxsz + \ 645 decode_sequence_maxsz + \ 646 decode_putfh_maxsz + \ 647 decode_lookup_maxsz + \ 648 decode_fs_locations_maxsz) 649 #if defined(CONFIG_NFS_V4_1) 650 #define NFS4_enc_exchange_id_sz \ 651 (compound_encode_hdr_maxsz + \ 652 encode_exchange_id_maxsz) 653 #define NFS4_dec_exchange_id_sz \ 654 (compound_decode_hdr_maxsz + \ 655 decode_exchange_id_maxsz) 656 #define NFS4_enc_create_session_sz \ 657 (compound_encode_hdr_maxsz + \ 658 encode_create_session_maxsz) 659 #define NFS4_dec_create_session_sz \ 660 (compound_decode_hdr_maxsz + \ 661 decode_create_session_maxsz) 662 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \ 663 encode_destroy_session_maxsz) 664 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \ 665 decode_destroy_session_maxsz) 666 #define NFS4_enc_sequence_sz \ 667 (compound_decode_hdr_maxsz + \ 668 encode_sequence_maxsz) 669 #define NFS4_dec_sequence_sz \ 670 (compound_decode_hdr_maxsz + \ 671 decode_sequence_maxsz) 672 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \ 673 encode_sequence_maxsz + \ 674 encode_putrootfh_maxsz + \ 675 encode_fsinfo_maxsz) 676 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \ 677 decode_sequence_maxsz + \ 678 decode_putrootfh_maxsz + \ 679 decode_fsinfo_maxsz) 680 #endif /* CONFIG_NFS_V4_1 */ 681 682 static const umode_t nfs_type2fmt[] = { 683 [NF4BAD] = 0, 684 [NF4REG] = S_IFREG, 685 [NF4DIR] = S_IFDIR, 686 [NF4BLK] = S_IFBLK, 687 [NF4CHR] = S_IFCHR, 688 [NF4LNK] = S_IFLNK, 689 [NF4SOCK] = S_IFSOCK, 690 [NF4FIFO] = S_IFIFO, 691 [NF4ATTRDIR] = 0, 692 [NF4NAMEDATTR] = 0, 693 }; 694 695 struct compound_hdr { 696 int32_t status; 697 uint32_t nops; 698 __be32 * nops_p; 699 uint32_t taglen; 700 char * tag; 701 uint32_t replen; /* expected reply words */ 702 u32 minorversion; 703 }; 704 705 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) 706 { 707 __be32 *p = xdr_reserve_space(xdr, nbytes); 708 BUG_ON(!p); 709 return p; 710 } 711 712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) 713 { 714 __be32 *p; 715 716 p = xdr_reserve_space(xdr, 4 + len); 717 BUG_ON(p == NULL); 718 xdr_encode_opaque(p, str, len); 719 } 720 721 static void encode_compound_hdr(struct xdr_stream *xdr, 722 struct rpc_rqst *req, 723 struct compound_hdr *hdr) 724 { 725 __be32 *p; 726 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth; 727 728 /* initialize running count of expected bytes in reply. 729 * NOTE: the replied tag SHOULD be the same is the one sent, 730 * but this is not required as a MUST for the server to do so. */ 731 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen; 732 733 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag); 734 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN); 735 p = reserve_space(xdr, 4 + hdr->taglen + 8); 736 p = xdr_encode_opaque(p, hdr->tag, hdr->taglen); 737 *p++ = cpu_to_be32(hdr->minorversion); 738 hdr->nops_p = p; 739 *p = cpu_to_be32(hdr->nops); 740 } 741 742 static void encode_nops(struct compound_hdr *hdr) 743 { 744 BUG_ON(hdr->nops > NFS4_MAX_OPS); 745 *hdr->nops_p = htonl(hdr->nops); 746 } 747 748 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf) 749 { 750 __be32 *p; 751 752 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 753 BUG_ON(p == NULL); 754 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE); 755 } 756 757 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server) 758 { 759 char owner_name[IDMAP_NAMESZ]; 760 char owner_group[IDMAP_NAMESZ]; 761 int owner_namelen = 0; 762 int owner_grouplen = 0; 763 __be32 *p; 764 __be32 *q; 765 int len; 766 uint32_t bmval0 = 0; 767 uint32_t bmval1 = 0; 768 769 /* 770 * We reserve enough space to write the entire attribute buffer at once. 771 * In the worst-case, this would be 772 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime) 773 * = 36 bytes, plus any contribution from variable-length fields 774 * such as owner/group. 775 */ 776 len = 16; 777 778 /* Sigh */ 779 if (iap->ia_valid & ATTR_SIZE) 780 len += 8; 781 if (iap->ia_valid & ATTR_MODE) 782 len += 4; 783 if (iap->ia_valid & ATTR_UID) { 784 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name); 785 if (owner_namelen < 0) { 786 dprintk("nfs: couldn't resolve uid %d to string\n", 787 iap->ia_uid); 788 /* XXX */ 789 strcpy(owner_name, "nobody"); 790 owner_namelen = sizeof("nobody") - 1; 791 /* goto out; */ 792 } 793 len += 4 + (XDR_QUADLEN(owner_namelen) << 2); 794 } 795 if (iap->ia_valid & ATTR_GID) { 796 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group); 797 if (owner_grouplen < 0) { 798 dprintk("nfs: couldn't resolve gid %d to string\n", 799 iap->ia_gid); 800 strcpy(owner_group, "nobody"); 801 owner_grouplen = sizeof("nobody") - 1; 802 /* goto out; */ 803 } 804 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); 805 } 806 if (iap->ia_valid & ATTR_ATIME_SET) 807 len += 16; 808 else if (iap->ia_valid & ATTR_ATIME) 809 len += 4; 810 if (iap->ia_valid & ATTR_MTIME_SET) 811 len += 16; 812 else if (iap->ia_valid & ATTR_MTIME) 813 len += 4; 814 p = reserve_space(xdr, len); 815 816 /* 817 * We write the bitmap length now, but leave the bitmap and the attribute 818 * buffer length to be backfilled at the end of this routine. 819 */ 820 *p++ = cpu_to_be32(2); 821 q = p; 822 p += 3; 823 824 if (iap->ia_valid & ATTR_SIZE) { 825 bmval0 |= FATTR4_WORD0_SIZE; 826 p = xdr_encode_hyper(p, iap->ia_size); 827 } 828 if (iap->ia_valid & ATTR_MODE) { 829 bmval1 |= FATTR4_WORD1_MODE; 830 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO); 831 } 832 if (iap->ia_valid & ATTR_UID) { 833 bmval1 |= FATTR4_WORD1_OWNER; 834 p = xdr_encode_opaque(p, owner_name, owner_namelen); 835 } 836 if (iap->ia_valid & ATTR_GID) { 837 bmval1 |= FATTR4_WORD1_OWNER_GROUP; 838 p = xdr_encode_opaque(p, owner_group, owner_grouplen); 839 } 840 if (iap->ia_valid & ATTR_ATIME_SET) { 841 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; 842 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); 843 *p++ = cpu_to_be32(0); 844 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec); 845 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); 846 } 847 else if (iap->ia_valid & ATTR_ATIME) { 848 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; 849 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); 850 } 851 if (iap->ia_valid & ATTR_MTIME_SET) { 852 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; 853 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); 854 *p++ = cpu_to_be32(0); 855 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec); 856 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); 857 } 858 else if (iap->ia_valid & ATTR_MTIME) { 859 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; 860 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); 861 } 862 863 /* 864 * Now we backfill the bitmap and the attribute buffer length. 865 */ 866 if (len != ((char *)p - (char *)q) + 4) { 867 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n", 868 len, ((char *)p - (char *)q) + 4); 869 BUG(); 870 } 871 len = (char *)p - (char *)q - 12; 872 *q++ = htonl(bmval0); 873 *q++ = htonl(bmval1); 874 *q = htonl(len); 875 876 /* out: */ 877 } 878 879 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr) 880 { 881 __be32 *p; 882 883 p = reserve_space(xdr, 8); 884 *p++ = cpu_to_be32(OP_ACCESS); 885 *p = cpu_to_be32(access); 886 hdr->nops++; 887 hdr->replen += decode_access_maxsz; 888 } 889 890 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) 891 { 892 __be32 *p; 893 894 p = reserve_space(xdr, 8+NFS4_STATEID_SIZE); 895 *p++ = cpu_to_be32(OP_CLOSE); 896 *p++ = cpu_to_be32(arg->seqid->sequence->counter); 897 xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); 898 hdr->nops++; 899 hdr->replen += decode_close_maxsz; 900 } 901 902 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) 903 { 904 __be32 *p; 905 906 p = reserve_space(xdr, 16); 907 *p++ = cpu_to_be32(OP_COMMIT); 908 p = xdr_encode_hyper(p, args->offset); 909 *p = cpu_to_be32(args->count); 910 hdr->nops++; 911 hdr->replen += decode_commit_maxsz; 912 } 913 914 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr) 915 { 916 __be32 *p; 917 918 p = reserve_space(xdr, 8); 919 *p++ = cpu_to_be32(OP_CREATE); 920 *p = cpu_to_be32(create->ftype); 921 922 switch (create->ftype) { 923 case NF4LNK: 924 p = reserve_space(xdr, 4); 925 *p = cpu_to_be32(create->u.symlink.len); 926 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len); 927 break; 928 929 case NF4BLK: case NF4CHR: 930 p = reserve_space(xdr, 8); 931 *p++ = cpu_to_be32(create->u.device.specdata1); 932 *p = cpu_to_be32(create->u.device.specdata2); 933 break; 934 935 default: 936 break; 937 } 938 939 encode_string(xdr, create->name->len, create->name->name); 940 hdr->nops++; 941 hdr->replen += decode_create_maxsz; 942 943 encode_attrs(xdr, create->attrs, create->server); 944 } 945 946 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr) 947 { 948 __be32 *p; 949 950 p = reserve_space(xdr, 12); 951 *p++ = cpu_to_be32(OP_GETATTR); 952 *p++ = cpu_to_be32(1); 953 *p = cpu_to_be32(bitmap); 954 hdr->nops++; 955 hdr->replen += decode_getattr_maxsz; 956 } 957 958 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr) 959 { 960 __be32 *p; 961 962 p = reserve_space(xdr, 16); 963 *p++ = cpu_to_be32(OP_GETATTR); 964 *p++ = cpu_to_be32(2); 965 *p++ = cpu_to_be32(bm0); 966 *p = cpu_to_be32(bm1); 967 hdr->nops++; 968 hdr->replen += decode_getattr_maxsz; 969 } 970 971 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) 972 { 973 encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0], 974 bitmask[1] & nfs4_fattr_bitmap[1], hdr); 975 } 976 977 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) 978 { 979 encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0], 980 bitmask[1] & nfs4_fsinfo_bitmap[1], hdr); 981 } 982 983 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) 984 { 985 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0], 986 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr); 987 } 988 989 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr) 990 { 991 __be32 *p; 992 993 p = reserve_space(xdr, 4); 994 *p = cpu_to_be32(OP_GETFH); 995 hdr->nops++; 996 hdr->replen += decode_getfh_maxsz; 997 } 998 999 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) 1000 { 1001 __be32 *p; 1002 1003 p = reserve_space(xdr, 8 + name->len); 1004 *p++ = cpu_to_be32(OP_LINK); 1005 xdr_encode_opaque(p, name->name, name->len); 1006 hdr->nops++; 1007 hdr->replen += decode_link_maxsz; 1008 } 1009 1010 static inline int nfs4_lock_type(struct file_lock *fl, int block) 1011 { 1012 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK) 1013 return block ? NFS4_READW_LT : NFS4_READ_LT; 1014 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT; 1015 } 1016 1017 static inline uint64_t nfs4_lock_length(struct file_lock *fl) 1018 { 1019 if (fl->fl_end == OFFSET_MAX) 1020 return ~(uint64_t)0; 1021 return fl->fl_end - fl->fl_start + 1; 1022 } 1023 1024 /* 1025 * opcode,type,reclaim,offset,length,new_lock_owner = 32 1026 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40 1027 */ 1028 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr) 1029 { 1030 __be32 *p; 1031 1032 p = reserve_space(xdr, 32); 1033 *p++ = cpu_to_be32(OP_LOCK); 1034 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block)); 1035 *p++ = cpu_to_be32(args->reclaim); 1036 p = xdr_encode_hyper(p, args->fl->fl_start); 1037 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl)); 1038 *p = cpu_to_be32(args->new_lock_owner); 1039 if (args->new_lock_owner){ 1040 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32); 1041 *p++ = cpu_to_be32(args->open_seqid->sequence->counter); 1042 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE); 1043 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter); 1044 p = xdr_encode_hyper(p, args->lock_owner.clientid); 1045 *p++ = cpu_to_be32(16); 1046 p = xdr_encode_opaque_fixed(p, "lock id:", 8); 1047 xdr_encode_hyper(p, args->lock_owner.id); 1048 } 1049 else { 1050 p = reserve_space(xdr, NFS4_STATEID_SIZE+4); 1051 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE); 1052 *p = cpu_to_be32(args->lock_seqid->sequence->counter); 1053 } 1054 hdr->nops++; 1055 hdr->replen += decode_lock_maxsz; 1056 } 1057 1058 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr) 1059 { 1060 __be32 *p; 1061 1062 p = reserve_space(xdr, 52); 1063 *p++ = cpu_to_be32(OP_LOCKT); 1064 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); 1065 p = xdr_encode_hyper(p, args->fl->fl_start); 1066 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl)); 1067 p = xdr_encode_hyper(p, args->lock_owner.clientid); 1068 *p++ = cpu_to_be32(16); 1069 p = xdr_encode_opaque_fixed(p, "lock id:", 8); 1070 xdr_encode_hyper(p, args->lock_owner.id); 1071 hdr->nops++; 1072 hdr->replen += decode_lockt_maxsz; 1073 } 1074 1075 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr) 1076 { 1077 __be32 *p; 1078 1079 p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16); 1080 *p++ = cpu_to_be32(OP_LOCKU); 1081 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); 1082 *p++ = cpu_to_be32(args->seqid->sequence->counter); 1083 p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE); 1084 p = xdr_encode_hyper(p, args->fl->fl_start); 1085 xdr_encode_hyper(p, nfs4_lock_length(args->fl)); 1086 hdr->nops++; 1087 hdr->replen += decode_locku_maxsz; 1088 } 1089 1090 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) 1091 { 1092 int len = name->len; 1093 __be32 *p; 1094 1095 p = reserve_space(xdr, 8 + len); 1096 *p++ = cpu_to_be32(OP_LOOKUP); 1097 xdr_encode_opaque(p, name->name, len); 1098 hdr->nops++; 1099 hdr->replen += decode_lookup_maxsz; 1100 } 1101 1102 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) 1103 { 1104 __be32 *p; 1105 1106 p = reserve_space(xdr, 8); 1107 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1108 case FMODE_READ: 1109 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ); 1110 break; 1111 case FMODE_WRITE: 1112 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE); 1113 break; 1114 case FMODE_READ|FMODE_WRITE: 1115 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH); 1116 break; 1117 default: 1118 *p++ = cpu_to_be32(0); 1119 } 1120 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */ 1121 } 1122 1123 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg) 1124 { 1125 __be32 *p; 1126 /* 1127 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4, 1128 * owner 4 = 32 1129 */ 1130 p = reserve_space(xdr, 8); 1131 *p++ = cpu_to_be32(OP_OPEN); 1132 *p = cpu_to_be32(arg->seqid->sequence->counter); 1133 encode_share_access(xdr, arg->fmode); 1134 p = reserve_space(xdr, 28); 1135 p = xdr_encode_hyper(p, arg->clientid); 1136 *p++ = cpu_to_be32(16); 1137 p = xdr_encode_opaque_fixed(p, "open id:", 8); 1138 xdr_encode_hyper(p, arg->id); 1139 } 1140 1141 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg) 1142 { 1143 __be32 *p; 1144 1145 p = reserve_space(xdr, 4); 1146 switch(arg->open_flags & O_EXCL) { 1147 case 0: 1148 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED); 1149 encode_attrs(xdr, arg->u.attrs, arg->server); 1150 break; 1151 default: 1152 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); 1153 encode_nfs4_verifier(xdr, &arg->u.verifier); 1154 } 1155 } 1156 1157 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg) 1158 { 1159 __be32 *p; 1160 1161 p = reserve_space(xdr, 4); 1162 switch (arg->open_flags & O_CREAT) { 1163 case 0: 1164 *p = cpu_to_be32(NFS4_OPEN_NOCREATE); 1165 break; 1166 default: 1167 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL); 1168 *p = cpu_to_be32(NFS4_OPEN_CREATE); 1169 encode_createmode(xdr, arg); 1170 } 1171 } 1172 1173 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type) 1174 { 1175 __be32 *p; 1176 1177 p = reserve_space(xdr, 4); 1178 switch (delegation_type) { 1179 case 0: 1180 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE); 1181 break; 1182 case FMODE_READ: 1183 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ); 1184 break; 1185 case FMODE_WRITE|FMODE_READ: 1186 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE); 1187 break; 1188 default: 1189 BUG(); 1190 } 1191 } 1192 1193 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name) 1194 { 1195 __be32 *p; 1196 1197 p = reserve_space(xdr, 4); 1198 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL); 1199 encode_string(xdr, name->len, name->name); 1200 } 1201 1202 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type) 1203 { 1204 __be32 *p; 1205 1206 p = reserve_space(xdr, 4); 1207 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS); 1208 encode_delegation_type(xdr, type); 1209 } 1210 1211 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid) 1212 { 1213 __be32 *p; 1214 1215 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); 1216 *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR); 1217 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); 1218 encode_string(xdr, name->len, name->name); 1219 } 1220 1221 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr) 1222 { 1223 encode_openhdr(xdr, arg); 1224 encode_opentype(xdr, arg); 1225 switch (arg->claim) { 1226 case NFS4_OPEN_CLAIM_NULL: 1227 encode_claim_null(xdr, arg->name); 1228 break; 1229 case NFS4_OPEN_CLAIM_PREVIOUS: 1230 encode_claim_previous(xdr, arg->u.delegation_type); 1231 break; 1232 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1233 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation); 1234 break; 1235 default: 1236 BUG(); 1237 } 1238 hdr->nops++; 1239 hdr->replen += decode_open_maxsz; 1240 } 1241 1242 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr) 1243 { 1244 __be32 *p; 1245 1246 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); 1247 *p++ = cpu_to_be32(OP_OPEN_CONFIRM); 1248 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); 1249 *p = cpu_to_be32(arg->seqid->sequence->counter); 1250 hdr->nops++; 1251 hdr->replen += decode_open_confirm_maxsz; 1252 } 1253 1254 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) 1255 { 1256 __be32 *p; 1257 1258 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); 1259 *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE); 1260 p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); 1261 *p = cpu_to_be32(arg->seqid->sequence->counter); 1262 encode_share_access(xdr, arg->fmode); 1263 hdr->nops++; 1264 hdr->replen += decode_open_downgrade_maxsz; 1265 } 1266 1267 static void 1268 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr) 1269 { 1270 int len = fh->size; 1271 __be32 *p; 1272 1273 p = reserve_space(xdr, 8 + len); 1274 *p++ = cpu_to_be32(OP_PUTFH); 1275 xdr_encode_opaque(p, fh->data, len); 1276 hdr->nops++; 1277 hdr->replen += decode_putfh_maxsz; 1278 } 1279 1280 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr) 1281 { 1282 __be32 *p; 1283 1284 p = reserve_space(xdr, 4); 1285 *p = cpu_to_be32(OP_PUTROOTFH); 1286 hdr->nops++; 1287 hdr->replen += decode_putrootfh_maxsz; 1288 } 1289 1290 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx) 1291 { 1292 nfs4_stateid stateid; 1293 __be32 *p; 1294 1295 p = reserve_space(xdr, NFS4_STATEID_SIZE); 1296 if (ctx->state != NULL) { 1297 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner); 1298 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE); 1299 } else 1300 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); 1301 } 1302 1303 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr) 1304 { 1305 __be32 *p; 1306 1307 p = reserve_space(xdr, 4); 1308 *p = cpu_to_be32(OP_READ); 1309 1310 encode_stateid(xdr, args->context); 1311 1312 p = reserve_space(xdr, 12); 1313 p = xdr_encode_hyper(p, args->offset); 1314 *p = cpu_to_be32(args->count); 1315 hdr->nops++; 1316 hdr->replen += decode_read_maxsz; 1317 } 1318 1319 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr) 1320 { 1321 uint32_t attrs[2] = { 1322 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID, 1323 FATTR4_WORD1_MOUNTED_ON_FILEID, 1324 }; 1325 __be32 *p; 1326 1327 p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20); 1328 *p++ = cpu_to_be32(OP_READDIR); 1329 p = xdr_encode_hyper(p, readdir->cookie); 1330 p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE); 1331 *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */ 1332 *p++ = cpu_to_be32(readdir->count); 1333 *p++ = cpu_to_be32(2); 1334 /* Switch to mounted_on_fileid if the server supports it */ 1335 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 1336 attrs[0] &= ~FATTR4_WORD0_FILEID; 1337 else 1338 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 1339 *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]); 1340 *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]); 1341 hdr->nops++; 1342 hdr->replen += decode_readdir_maxsz; 1343 dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n", 1344 __func__, 1345 (unsigned long long)readdir->cookie, 1346 ((u32 *)readdir->verifier.data)[0], 1347 ((u32 *)readdir->verifier.data)[1], 1348 attrs[0] & readdir->bitmask[0], 1349 attrs[1] & readdir->bitmask[1]); 1350 } 1351 1352 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr) 1353 { 1354 __be32 *p; 1355 1356 p = reserve_space(xdr, 4); 1357 *p = cpu_to_be32(OP_READLINK); 1358 hdr->nops++; 1359 hdr->replen += decode_readlink_maxsz; 1360 } 1361 1362 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) 1363 { 1364 __be32 *p; 1365 1366 p = reserve_space(xdr, 8 + name->len); 1367 *p++ = cpu_to_be32(OP_REMOVE); 1368 xdr_encode_opaque(p, name->name, name->len); 1369 hdr->nops++; 1370 hdr->replen += decode_remove_maxsz; 1371 } 1372 1373 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr) 1374 { 1375 __be32 *p; 1376 1377 p = reserve_space(xdr, 4); 1378 *p = cpu_to_be32(OP_RENAME); 1379 encode_string(xdr, oldname->len, oldname->name); 1380 encode_string(xdr, newname->len, newname->name); 1381 hdr->nops++; 1382 hdr->replen += decode_rename_maxsz; 1383 } 1384 1385 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr) 1386 { 1387 __be32 *p; 1388 1389 p = reserve_space(xdr, 12); 1390 *p++ = cpu_to_be32(OP_RENEW); 1391 xdr_encode_hyper(p, client_stateid->cl_clientid); 1392 hdr->nops++; 1393 hdr->replen += decode_renew_maxsz; 1394 } 1395 1396 static void 1397 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) 1398 { 1399 __be32 *p; 1400 1401 p = reserve_space(xdr, 4); 1402 *p = cpu_to_be32(OP_RESTOREFH); 1403 hdr->nops++; 1404 hdr->replen += decode_restorefh_maxsz; 1405 } 1406 1407 static int 1408 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr) 1409 { 1410 __be32 *p; 1411 1412 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); 1413 *p++ = cpu_to_be32(OP_SETATTR); 1414 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); 1415 p = reserve_space(xdr, 2*4); 1416 *p++ = cpu_to_be32(1); 1417 *p = cpu_to_be32(FATTR4_WORD0_ACL); 1418 if (arg->acl_len % 4) 1419 return -EINVAL; 1420 p = reserve_space(xdr, 4); 1421 *p = cpu_to_be32(arg->acl_len); 1422 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); 1423 hdr->nops++; 1424 hdr->replen += decode_setacl_maxsz; 1425 return 0; 1426 } 1427 1428 static void 1429 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr) 1430 { 1431 __be32 *p; 1432 1433 p = reserve_space(xdr, 4); 1434 *p = cpu_to_be32(OP_SAVEFH); 1435 hdr->nops++; 1436 hdr->replen += decode_savefh_maxsz; 1437 } 1438 1439 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr) 1440 { 1441 __be32 *p; 1442 1443 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); 1444 *p++ = cpu_to_be32(OP_SETATTR); 1445 xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE); 1446 hdr->nops++; 1447 hdr->replen += decode_setattr_maxsz; 1448 encode_attrs(xdr, arg->iap, server); 1449 } 1450 1451 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr) 1452 { 1453 __be32 *p; 1454 1455 p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE); 1456 *p++ = cpu_to_be32(OP_SETCLIENTID); 1457 xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE); 1458 1459 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name); 1460 p = reserve_space(xdr, 4); 1461 *p = cpu_to_be32(setclientid->sc_prog); 1462 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid); 1463 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr); 1464 p = reserve_space(xdr, 4); 1465 *p = cpu_to_be32(setclientid->sc_cb_ident); 1466 hdr->nops++; 1467 hdr->replen += decode_setclientid_maxsz; 1468 } 1469 1470 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr) 1471 { 1472 __be32 *p; 1473 1474 p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE); 1475 *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM); 1476 p = xdr_encode_hyper(p, client_state->cl_clientid); 1477 xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE); 1478 hdr->nops++; 1479 hdr->replen += decode_setclientid_confirm_maxsz; 1480 } 1481 1482 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) 1483 { 1484 __be32 *p; 1485 1486 p = reserve_space(xdr, 4); 1487 *p = cpu_to_be32(OP_WRITE); 1488 1489 encode_stateid(xdr, args->context); 1490 1491 p = reserve_space(xdr, 16); 1492 p = xdr_encode_hyper(p, args->offset); 1493 *p++ = cpu_to_be32(args->stable); 1494 *p = cpu_to_be32(args->count); 1495 1496 xdr_write_pages(xdr, args->pages, args->pgbase, args->count); 1497 hdr->nops++; 1498 hdr->replen += decode_write_maxsz; 1499 } 1500 1501 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr) 1502 { 1503 __be32 *p; 1504 1505 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); 1506 1507 *p++ = cpu_to_be32(OP_DELEGRETURN); 1508 xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); 1509 hdr->nops++; 1510 hdr->replen += decode_delegreturn_maxsz; 1511 } 1512 1513 #if defined(CONFIG_NFS_V4_1) 1514 /* NFSv4.1 operations */ 1515 static void encode_exchange_id(struct xdr_stream *xdr, 1516 struct nfs41_exchange_id_args *args, 1517 struct compound_hdr *hdr) 1518 { 1519 __be32 *p; 1520 1521 p = reserve_space(xdr, 4 + sizeof(args->verifier->data)); 1522 *p++ = cpu_to_be32(OP_EXCHANGE_ID); 1523 xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data)); 1524 1525 encode_string(xdr, args->id_len, args->id); 1526 1527 p = reserve_space(xdr, 12); 1528 *p++ = cpu_to_be32(args->flags); 1529 *p++ = cpu_to_be32(0); /* zero length state_protect4_a */ 1530 *p = cpu_to_be32(0); /* zero length implementation id array */ 1531 hdr->nops++; 1532 hdr->replen += decode_exchange_id_maxsz; 1533 } 1534 1535 static void encode_create_session(struct xdr_stream *xdr, 1536 struct nfs41_create_session_args *args, 1537 struct compound_hdr *hdr) 1538 { 1539 __be32 *p; 1540 char machine_name[NFS4_MAX_MACHINE_NAME_LEN]; 1541 uint32_t len; 1542 struct nfs_client *clp = args->client; 1543 1544 len = scnprintf(machine_name, sizeof(machine_name), "%s", 1545 clp->cl_ipaddr); 1546 1547 p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12); 1548 *p++ = cpu_to_be32(OP_CREATE_SESSION); 1549 p = xdr_encode_hyper(p, clp->cl_ex_clid); 1550 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */ 1551 *p++ = cpu_to_be32(args->flags); /*flags */ 1552 1553 /* Fore Channel */ 1554 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */ 1555 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */ 1556 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */ 1557 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached); /* Max resp sz cached */ 1558 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */ 1559 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */ 1560 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */ 1561 1562 /* Back Channel */ 1563 *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */ 1564 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */ 1565 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */ 1566 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */ 1567 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */ 1568 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */ 1569 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */ 1570 1571 *p++ = cpu_to_be32(args->cb_program); /* cb_program */ 1572 *p++ = cpu_to_be32(1); 1573 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */ 1574 1575 /* authsys_parms rfc1831 */ 1576 *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */ 1577 p = xdr_encode_opaque(p, machine_name, len); 1578 *p++ = cpu_to_be32(0); /* UID */ 1579 *p++ = cpu_to_be32(0); /* GID */ 1580 *p = cpu_to_be32(0); /* No more gids */ 1581 hdr->nops++; 1582 hdr->replen += decode_create_session_maxsz; 1583 } 1584 1585 static void encode_destroy_session(struct xdr_stream *xdr, 1586 struct nfs4_session *session, 1587 struct compound_hdr *hdr) 1588 { 1589 __be32 *p; 1590 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN); 1591 *p++ = cpu_to_be32(OP_DESTROY_SESSION); 1592 xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); 1593 hdr->nops++; 1594 hdr->replen += decode_destroy_session_maxsz; 1595 } 1596 #endif /* CONFIG_NFS_V4_1 */ 1597 1598 static void encode_sequence(struct xdr_stream *xdr, 1599 const struct nfs4_sequence_args *args, 1600 struct compound_hdr *hdr) 1601 { 1602 #if defined(CONFIG_NFS_V4_1) 1603 struct nfs4_session *session = args->sa_session; 1604 struct nfs4_slot_table *tp; 1605 struct nfs4_slot *slot; 1606 __be32 *p; 1607 1608 if (!session) 1609 return; 1610 1611 tp = &session->fc_slot_table; 1612 1613 WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE); 1614 slot = tp->slots + args->sa_slotid; 1615 1616 p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16); 1617 *p++ = cpu_to_be32(OP_SEQUENCE); 1618 1619 /* 1620 * Sessionid + seqid + slotid + max slotid + cache_this 1621 */ 1622 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d " 1623 "max_slotid=%d cache_this=%d\n", 1624 __func__, 1625 ((u32 *)session->sess_id.data)[0], 1626 ((u32 *)session->sess_id.data)[1], 1627 ((u32 *)session->sess_id.data)[2], 1628 ((u32 *)session->sess_id.data)[3], 1629 slot->seq_nr, args->sa_slotid, 1630 tp->highest_used_slotid, args->sa_cache_this); 1631 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); 1632 *p++ = cpu_to_be32(slot->seq_nr); 1633 *p++ = cpu_to_be32(args->sa_slotid); 1634 *p++ = cpu_to_be32(tp->highest_used_slotid); 1635 *p = cpu_to_be32(args->sa_cache_this); 1636 hdr->nops++; 1637 hdr->replen += decode_sequence_maxsz; 1638 #endif /* CONFIG_NFS_V4_1 */ 1639 } 1640 1641 /* 1642 * END OF "GENERIC" ENCODE ROUTINES. 1643 */ 1644 1645 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) 1646 { 1647 #if defined(CONFIG_NFS_V4_1) 1648 if (args->sa_session) 1649 return args->sa_session->clp->cl_minorversion; 1650 #endif /* CONFIG_NFS_V4_1 */ 1651 return 0; 1652 } 1653 1654 /* 1655 * Encode an ACCESS request 1656 */ 1657 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args) 1658 { 1659 struct xdr_stream xdr; 1660 struct compound_hdr hdr = { 1661 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1662 }; 1663 1664 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1665 encode_compound_hdr(&xdr, req, &hdr); 1666 encode_sequence(&xdr, &args->seq_args, &hdr); 1667 encode_putfh(&xdr, args->fh, &hdr); 1668 encode_access(&xdr, args->access, &hdr); 1669 encode_getfattr(&xdr, args->bitmask, &hdr); 1670 encode_nops(&hdr); 1671 return 0; 1672 } 1673 1674 /* 1675 * Encode LOOKUP request 1676 */ 1677 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args) 1678 { 1679 struct xdr_stream xdr; 1680 struct compound_hdr hdr = { 1681 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1682 }; 1683 1684 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1685 encode_compound_hdr(&xdr, req, &hdr); 1686 encode_sequence(&xdr, &args->seq_args, &hdr); 1687 encode_putfh(&xdr, args->dir_fh, &hdr); 1688 encode_lookup(&xdr, args->name, &hdr); 1689 encode_getfh(&xdr, &hdr); 1690 encode_getfattr(&xdr, args->bitmask, &hdr); 1691 encode_nops(&hdr); 1692 return 0; 1693 } 1694 1695 /* 1696 * Encode LOOKUP_ROOT request 1697 */ 1698 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args) 1699 { 1700 struct xdr_stream xdr; 1701 struct compound_hdr hdr = { 1702 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1703 }; 1704 1705 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1706 encode_compound_hdr(&xdr, req, &hdr); 1707 encode_sequence(&xdr, &args->seq_args, &hdr); 1708 encode_putrootfh(&xdr, &hdr); 1709 encode_getfh(&xdr, &hdr); 1710 encode_getfattr(&xdr, args->bitmask, &hdr); 1711 encode_nops(&hdr); 1712 return 0; 1713 } 1714 1715 /* 1716 * Encode REMOVE request 1717 */ 1718 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) 1719 { 1720 struct xdr_stream xdr; 1721 struct compound_hdr hdr = { 1722 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1723 }; 1724 1725 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1726 encode_compound_hdr(&xdr, req, &hdr); 1727 encode_sequence(&xdr, &args->seq_args, &hdr); 1728 encode_putfh(&xdr, args->fh, &hdr); 1729 encode_remove(&xdr, &args->name, &hdr); 1730 encode_getfattr(&xdr, args->bitmask, &hdr); 1731 encode_nops(&hdr); 1732 return 0; 1733 } 1734 1735 /* 1736 * Encode RENAME request 1737 */ 1738 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args) 1739 { 1740 struct xdr_stream xdr; 1741 struct compound_hdr hdr = { 1742 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1743 }; 1744 1745 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1746 encode_compound_hdr(&xdr, req, &hdr); 1747 encode_sequence(&xdr, &args->seq_args, &hdr); 1748 encode_putfh(&xdr, args->old_dir, &hdr); 1749 encode_savefh(&xdr, &hdr); 1750 encode_putfh(&xdr, args->new_dir, &hdr); 1751 encode_rename(&xdr, args->old_name, args->new_name, &hdr); 1752 encode_getfattr(&xdr, args->bitmask, &hdr); 1753 encode_restorefh(&xdr, &hdr); 1754 encode_getfattr(&xdr, args->bitmask, &hdr); 1755 encode_nops(&hdr); 1756 return 0; 1757 } 1758 1759 /* 1760 * Encode LINK request 1761 */ 1762 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args) 1763 { 1764 struct xdr_stream xdr; 1765 struct compound_hdr hdr = { 1766 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1767 }; 1768 1769 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1770 encode_compound_hdr(&xdr, req, &hdr); 1771 encode_sequence(&xdr, &args->seq_args, &hdr); 1772 encode_putfh(&xdr, args->fh, &hdr); 1773 encode_savefh(&xdr, &hdr); 1774 encode_putfh(&xdr, args->dir_fh, &hdr); 1775 encode_link(&xdr, args->name, &hdr); 1776 encode_getfattr(&xdr, args->bitmask, &hdr); 1777 encode_restorefh(&xdr, &hdr); 1778 encode_getfattr(&xdr, args->bitmask, &hdr); 1779 encode_nops(&hdr); 1780 return 0; 1781 } 1782 1783 /* 1784 * Encode CREATE request 1785 */ 1786 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) 1787 { 1788 struct xdr_stream xdr; 1789 struct compound_hdr hdr = { 1790 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1791 }; 1792 1793 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1794 encode_compound_hdr(&xdr, req, &hdr); 1795 encode_sequence(&xdr, &args->seq_args, &hdr); 1796 encode_putfh(&xdr, args->dir_fh, &hdr); 1797 encode_savefh(&xdr, &hdr); 1798 encode_create(&xdr, args, &hdr); 1799 encode_getfh(&xdr, &hdr); 1800 encode_getfattr(&xdr, args->bitmask, &hdr); 1801 encode_restorefh(&xdr, &hdr); 1802 encode_getfattr(&xdr, args->bitmask, &hdr); 1803 encode_nops(&hdr); 1804 return 0; 1805 } 1806 1807 /* 1808 * Encode SYMLINK request 1809 */ 1810 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) 1811 { 1812 return nfs4_xdr_enc_create(req, p, args); 1813 } 1814 1815 /* 1816 * Encode GETATTR request 1817 */ 1818 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args) 1819 { 1820 struct xdr_stream xdr; 1821 struct compound_hdr hdr = { 1822 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1823 }; 1824 1825 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1826 encode_compound_hdr(&xdr, req, &hdr); 1827 encode_sequence(&xdr, &args->seq_args, &hdr); 1828 encode_putfh(&xdr, args->fh, &hdr); 1829 encode_getfattr(&xdr, args->bitmask, &hdr); 1830 encode_nops(&hdr); 1831 return 0; 1832 } 1833 1834 /* 1835 * Encode a CLOSE request 1836 */ 1837 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) 1838 { 1839 struct xdr_stream xdr; 1840 struct compound_hdr hdr = { 1841 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1842 }; 1843 1844 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1845 encode_compound_hdr(&xdr, req, &hdr); 1846 encode_sequence(&xdr, &args->seq_args, &hdr); 1847 encode_putfh(&xdr, args->fh, &hdr); 1848 encode_close(&xdr, args, &hdr); 1849 encode_getfattr(&xdr, args->bitmask, &hdr); 1850 encode_nops(&hdr); 1851 return 0; 1852 } 1853 1854 /* 1855 * Encode an OPEN request 1856 */ 1857 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) 1858 { 1859 struct xdr_stream xdr; 1860 struct compound_hdr hdr = { 1861 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1862 }; 1863 1864 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1865 encode_compound_hdr(&xdr, req, &hdr); 1866 encode_sequence(&xdr, &args->seq_args, &hdr); 1867 encode_putfh(&xdr, args->fh, &hdr); 1868 encode_savefh(&xdr, &hdr); 1869 encode_open(&xdr, args, &hdr); 1870 encode_getfh(&xdr, &hdr); 1871 encode_getfattr(&xdr, args->bitmask, &hdr); 1872 encode_restorefh(&xdr, &hdr); 1873 encode_getfattr(&xdr, args->bitmask, &hdr); 1874 encode_nops(&hdr); 1875 return 0; 1876 } 1877 1878 /* 1879 * Encode an OPEN_CONFIRM request 1880 */ 1881 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args) 1882 { 1883 struct xdr_stream xdr; 1884 struct compound_hdr hdr = { 1885 .nops = 0, 1886 }; 1887 1888 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1889 encode_compound_hdr(&xdr, req, &hdr); 1890 encode_putfh(&xdr, args->fh, &hdr); 1891 encode_open_confirm(&xdr, args, &hdr); 1892 encode_nops(&hdr); 1893 return 0; 1894 } 1895 1896 /* 1897 * Encode an OPEN request with no attributes. 1898 */ 1899 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) 1900 { 1901 struct xdr_stream xdr; 1902 struct compound_hdr hdr = { 1903 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1904 }; 1905 1906 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1907 encode_compound_hdr(&xdr, req, &hdr); 1908 encode_sequence(&xdr, &args->seq_args, &hdr); 1909 encode_putfh(&xdr, args->fh, &hdr); 1910 encode_open(&xdr, args, &hdr); 1911 encode_getfattr(&xdr, args->bitmask, &hdr); 1912 encode_nops(&hdr); 1913 return 0; 1914 } 1915 1916 /* 1917 * Encode an OPEN_DOWNGRADE request 1918 */ 1919 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) 1920 { 1921 struct xdr_stream xdr; 1922 struct compound_hdr hdr = { 1923 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1924 }; 1925 1926 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1927 encode_compound_hdr(&xdr, req, &hdr); 1928 encode_sequence(&xdr, &args->seq_args, &hdr); 1929 encode_putfh(&xdr, args->fh, &hdr); 1930 encode_open_downgrade(&xdr, args, &hdr); 1931 encode_getfattr(&xdr, args->bitmask, &hdr); 1932 encode_nops(&hdr); 1933 return 0; 1934 } 1935 1936 /* 1937 * Encode a LOCK request 1938 */ 1939 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args) 1940 { 1941 struct xdr_stream xdr; 1942 struct compound_hdr hdr = { 1943 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1944 }; 1945 1946 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1947 encode_compound_hdr(&xdr, req, &hdr); 1948 encode_sequence(&xdr, &args->seq_args, &hdr); 1949 encode_putfh(&xdr, args->fh, &hdr); 1950 encode_lock(&xdr, args, &hdr); 1951 encode_nops(&hdr); 1952 return 0; 1953 } 1954 1955 /* 1956 * Encode a LOCKT request 1957 */ 1958 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args) 1959 { 1960 struct xdr_stream xdr; 1961 struct compound_hdr hdr = { 1962 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1963 }; 1964 1965 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1966 encode_compound_hdr(&xdr, req, &hdr); 1967 encode_sequence(&xdr, &args->seq_args, &hdr); 1968 encode_putfh(&xdr, args->fh, &hdr); 1969 encode_lockt(&xdr, args, &hdr); 1970 encode_nops(&hdr); 1971 return 0; 1972 } 1973 1974 /* 1975 * Encode a LOCKU request 1976 */ 1977 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args) 1978 { 1979 struct xdr_stream xdr; 1980 struct compound_hdr hdr = { 1981 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 1982 }; 1983 1984 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 1985 encode_compound_hdr(&xdr, req, &hdr); 1986 encode_sequence(&xdr, &args->seq_args, &hdr); 1987 encode_putfh(&xdr, args->fh, &hdr); 1988 encode_locku(&xdr, args, &hdr); 1989 encode_nops(&hdr); 1990 return 0; 1991 } 1992 1993 /* 1994 * Encode a READLINK request 1995 */ 1996 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args) 1997 { 1998 struct xdr_stream xdr; 1999 struct compound_hdr hdr = { 2000 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2001 }; 2002 2003 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2004 encode_compound_hdr(&xdr, req, &hdr); 2005 encode_sequence(&xdr, &args->seq_args, &hdr); 2006 encode_putfh(&xdr, args->fh, &hdr); 2007 encode_readlink(&xdr, args, req, &hdr); 2008 2009 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, 2010 args->pgbase, args->pglen); 2011 encode_nops(&hdr); 2012 return 0; 2013 } 2014 2015 /* 2016 * Encode a READDIR request 2017 */ 2018 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args) 2019 { 2020 struct xdr_stream xdr; 2021 struct compound_hdr hdr = { 2022 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2023 }; 2024 2025 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2026 encode_compound_hdr(&xdr, req, &hdr); 2027 encode_sequence(&xdr, &args->seq_args, &hdr); 2028 encode_putfh(&xdr, args->fh, &hdr); 2029 encode_readdir(&xdr, args, req, &hdr); 2030 2031 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, 2032 args->pgbase, args->count); 2033 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n", 2034 __func__, hdr.replen << 2, args->pages, 2035 args->pgbase, args->count); 2036 encode_nops(&hdr); 2037 return 0; 2038 } 2039 2040 /* 2041 * Encode a READ request 2042 */ 2043 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) 2044 { 2045 struct xdr_stream xdr; 2046 struct compound_hdr hdr = { 2047 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2048 }; 2049 2050 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2051 encode_compound_hdr(&xdr, req, &hdr); 2052 encode_sequence(&xdr, &args->seq_args, &hdr); 2053 encode_putfh(&xdr, args->fh, &hdr); 2054 encode_read(&xdr, args, &hdr); 2055 2056 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, 2057 args->pages, args->pgbase, args->count); 2058 req->rq_rcv_buf.flags |= XDRBUF_READ; 2059 encode_nops(&hdr); 2060 return 0; 2061 } 2062 2063 /* 2064 * Encode an SETATTR request 2065 */ 2066 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args) 2067 { 2068 struct xdr_stream xdr; 2069 struct compound_hdr hdr = { 2070 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2071 }; 2072 2073 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2074 encode_compound_hdr(&xdr, req, &hdr); 2075 encode_sequence(&xdr, &args->seq_args, &hdr); 2076 encode_putfh(&xdr, args->fh, &hdr); 2077 encode_setattr(&xdr, args, args->server, &hdr); 2078 encode_getfattr(&xdr, args->bitmask, &hdr); 2079 encode_nops(&hdr); 2080 return 0; 2081 } 2082 2083 /* 2084 * Encode a GETACL request 2085 */ 2086 static int 2087 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p, 2088 struct nfs_getaclargs *args) 2089 { 2090 struct xdr_stream xdr; 2091 struct compound_hdr hdr = { 2092 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2093 }; 2094 uint32_t replen; 2095 2096 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2097 encode_compound_hdr(&xdr, req, &hdr); 2098 encode_sequence(&xdr, &args->seq_args, &hdr); 2099 encode_putfh(&xdr, args->fh, &hdr); 2100 replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1; 2101 encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr); 2102 2103 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, 2104 args->acl_pages, args->acl_pgbase, args->acl_len); 2105 encode_nops(&hdr); 2106 return 0; 2107 } 2108 2109 /* 2110 * Encode a WRITE request 2111 */ 2112 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) 2113 { 2114 struct xdr_stream xdr; 2115 struct compound_hdr hdr = { 2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2117 }; 2118 2119 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2120 encode_compound_hdr(&xdr, req, &hdr); 2121 encode_sequence(&xdr, &args->seq_args, &hdr); 2122 encode_putfh(&xdr, args->fh, &hdr); 2123 encode_write(&xdr, args, &hdr); 2124 req->rq_snd_buf.flags |= XDRBUF_WRITE; 2125 encode_getfattr(&xdr, args->bitmask, &hdr); 2126 encode_nops(&hdr); 2127 return 0; 2128 } 2129 2130 /* 2131 * a COMMIT request 2132 */ 2133 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) 2134 { 2135 struct xdr_stream xdr; 2136 struct compound_hdr hdr = { 2137 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2138 }; 2139 2140 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2141 encode_compound_hdr(&xdr, req, &hdr); 2142 encode_sequence(&xdr, &args->seq_args, &hdr); 2143 encode_putfh(&xdr, args->fh, &hdr); 2144 encode_commit(&xdr, args, &hdr); 2145 encode_getfattr(&xdr, args->bitmask, &hdr); 2146 encode_nops(&hdr); 2147 return 0; 2148 } 2149 2150 /* 2151 * FSINFO request 2152 */ 2153 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args) 2154 { 2155 struct xdr_stream xdr; 2156 struct compound_hdr hdr = { 2157 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2158 }; 2159 2160 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2161 encode_compound_hdr(&xdr, req, &hdr); 2162 encode_sequence(&xdr, &args->seq_args, &hdr); 2163 encode_putfh(&xdr, args->fh, &hdr); 2164 encode_fsinfo(&xdr, args->bitmask, &hdr); 2165 encode_nops(&hdr); 2166 return 0; 2167 } 2168 2169 /* 2170 * a PATHCONF request 2171 */ 2172 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args) 2173 { 2174 struct xdr_stream xdr; 2175 struct compound_hdr hdr = { 2176 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2177 }; 2178 2179 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2180 encode_compound_hdr(&xdr, req, &hdr); 2181 encode_sequence(&xdr, &args->seq_args, &hdr); 2182 encode_putfh(&xdr, args->fh, &hdr); 2183 encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], 2184 &hdr); 2185 encode_nops(&hdr); 2186 return 0; 2187 } 2188 2189 /* 2190 * a STATFS request 2191 */ 2192 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args) 2193 { 2194 struct xdr_stream xdr; 2195 struct compound_hdr hdr = { 2196 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2197 }; 2198 2199 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2200 encode_compound_hdr(&xdr, req, &hdr); 2201 encode_sequence(&xdr, &args->seq_args, &hdr); 2202 encode_putfh(&xdr, args->fh, &hdr); 2203 encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], 2204 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr); 2205 encode_nops(&hdr); 2206 return 0; 2207 } 2208 2209 /* 2210 * GETATTR_BITMAP request 2211 */ 2212 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, 2213 struct nfs4_server_caps_arg *args) 2214 { 2215 struct xdr_stream xdr; 2216 struct compound_hdr hdr = { 2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2218 }; 2219 2220 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2221 encode_compound_hdr(&xdr, req, &hdr); 2222 encode_sequence(&xdr, &args->seq_args, &hdr); 2223 encode_putfh(&xdr, args->fhandle, &hdr); 2224 encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS| 2225 FATTR4_WORD0_LINK_SUPPORT| 2226 FATTR4_WORD0_SYMLINK_SUPPORT| 2227 FATTR4_WORD0_ACLSUPPORT, &hdr); 2228 encode_nops(&hdr); 2229 return 0; 2230 } 2231 2232 /* 2233 * a RENEW request 2234 */ 2235 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) 2236 { 2237 struct xdr_stream xdr; 2238 struct compound_hdr hdr = { 2239 .nops = 0, 2240 }; 2241 2242 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2243 encode_compound_hdr(&xdr, req, &hdr); 2244 encode_renew(&xdr, clp, &hdr); 2245 encode_nops(&hdr); 2246 return 0; 2247 } 2248 2249 /* 2250 * a SETCLIENTID request 2251 */ 2252 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc) 2253 { 2254 struct xdr_stream xdr; 2255 struct compound_hdr hdr = { 2256 .nops = 0, 2257 }; 2258 2259 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2260 encode_compound_hdr(&xdr, req, &hdr); 2261 encode_setclientid(&xdr, sc, &hdr); 2262 encode_nops(&hdr); 2263 return 0; 2264 } 2265 2266 /* 2267 * a SETCLIENTID_CONFIRM request 2268 */ 2269 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) 2270 { 2271 struct xdr_stream xdr; 2272 struct compound_hdr hdr = { 2273 .nops = 0, 2274 }; 2275 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; 2276 2277 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2278 encode_compound_hdr(&xdr, req, &hdr); 2279 encode_setclientid_confirm(&xdr, clp, &hdr); 2280 encode_putrootfh(&xdr, &hdr); 2281 encode_fsinfo(&xdr, lease_bitmap, &hdr); 2282 encode_nops(&hdr); 2283 return 0; 2284 } 2285 2286 /* 2287 * DELEGRETURN request 2288 */ 2289 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args) 2290 { 2291 struct xdr_stream xdr; 2292 struct compound_hdr hdr = { 2293 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2294 }; 2295 2296 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2297 encode_compound_hdr(&xdr, req, &hdr); 2298 encode_sequence(&xdr, &args->seq_args, &hdr); 2299 encode_putfh(&xdr, args->fhandle, &hdr); 2300 encode_delegreturn(&xdr, args->stateid, &hdr); 2301 encode_getfattr(&xdr, args->bitmask, &hdr); 2302 encode_nops(&hdr); 2303 return 0; 2304 } 2305 2306 /* 2307 * Encode FS_LOCATIONS request 2308 */ 2309 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args) 2310 { 2311 struct xdr_stream xdr; 2312 struct compound_hdr hdr = { 2313 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 2314 }; 2315 uint32_t replen; 2316 2317 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2318 encode_compound_hdr(&xdr, req, &hdr); 2319 encode_sequence(&xdr, &args->seq_args, &hdr); 2320 encode_putfh(&xdr, args->dir_fh, &hdr); 2321 encode_lookup(&xdr, args->name, &hdr); 2322 replen = hdr.replen; /* get the attribute into args->page */ 2323 encode_fs_locations(&xdr, args->bitmask, &hdr); 2324 2325 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page, 2326 0, PAGE_SIZE); 2327 encode_nops(&hdr); 2328 return 0; 2329 } 2330 2331 #if defined(CONFIG_NFS_V4_1) 2332 /* 2333 * EXCHANGE_ID request 2334 */ 2335 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p, 2336 struct nfs41_exchange_id_args *args) 2337 { 2338 struct xdr_stream xdr; 2339 struct compound_hdr hdr = { 2340 .minorversion = args->client->cl_minorversion, 2341 }; 2342 2343 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2344 encode_compound_hdr(&xdr, req, &hdr); 2345 encode_exchange_id(&xdr, args, &hdr); 2346 encode_nops(&hdr); 2347 return 0; 2348 } 2349 2350 /* 2351 * a CREATE_SESSION request 2352 */ 2353 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p, 2354 struct nfs41_create_session_args *args) 2355 { 2356 struct xdr_stream xdr; 2357 struct compound_hdr hdr = { 2358 .minorversion = args->client->cl_minorversion, 2359 }; 2360 2361 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2362 encode_compound_hdr(&xdr, req, &hdr); 2363 encode_create_session(&xdr, args, &hdr); 2364 encode_nops(&hdr); 2365 return 0; 2366 } 2367 2368 /* 2369 * a DESTROY_SESSION request 2370 */ 2371 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p, 2372 struct nfs4_session *session) 2373 { 2374 struct xdr_stream xdr; 2375 struct compound_hdr hdr = { 2376 .minorversion = session->clp->cl_minorversion, 2377 }; 2378 2379 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2380 encode_compound_hdr(&xdr, req, &hdr); 2381 encode_destroy_session(&xdr, session, &hdr); 2382 encode_nops(&hdr); 2383 return 0; 2384 } 2385 2386 /* 2387 * a SEQUENCE request 2388 */ 2389 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p, 2390 struct nfs4_sequence_args *args) 2391 { 2392 struct xdr_stream xdr; 2393 struct compound_hdr hdr = { 2394 .minorversion = nfs4_xdr_minorversion(args), 2395 }; 2396 2397 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2398 encode_compound_hdr(&xdr, req, &hdr); 2399 encode_sequence(&xdr, args, &hdr); 2400 encode_nops(&hdr); 2401 return 0; 2402 } 2403 2404 /* 2405 * a GET_LEASE_TIME request 2406 */ 2407 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p, 2408 struct nfs4_get_lease_time_args *args) 2409 { 2410 struct xdr_stream xdr; 2411 struct compound_hdr hdr = { 2412 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args), 2413 }; 2414 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; 2415 2416 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 2417 encode_compound_hdr(&xdr, req, &hdr); 2418 encode_sequence(&xdr, &args->la_seq_args, &hdr); 2419 encode_putrootfh(&xdr, &hdr); 2420 encode_fsinfo(&xdr, lease_bitmap, &hdr); 2421 encode_nops(&hdr); 2422 return 0; 2423 } 2424 #endif /* CONFIG_NFS_V4_1 */ 2425 2426 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) 2427 { 2428 dprintk("nfs: %s: prematurely hit end of receive buffer. " 2429 "Remaining buffer length is %tu words.\n", 2430 func, xdr->end - xdr->p); 2431 } 2432 2433 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string) 2434 { 2435 __be32 *p; 2436 2437 p = xdr_inline_decode(xdr, 4); 2438 if (unlikely(!p)) 2439 goto out_overflow; 2440 *len = be32_to_cpup(p); 2441 p = xdr_inline_decode(xdr, *len); 2442 if (unlikely(!p)) 2443 goto out_overflow; 2444 *string = (char *)p; 2445 return 0; 2446 out_overflow: 2447 print_overflow_msg(__func__, xdr); 2448 return -EIO; 2449 } 2450 2451 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr) 2452 { 2453 __be32 *p; 2454 2455 p = xdr_inline_decode(xdr, 8); 2456 if (unlikely(!p)) 2457 goto out_overflow; 2458 hdr->status = be32_to_cpup(p++); 2459 hdr->taglen = be32_to_cpup(p); 2460 2461 p = xdr_inline_decode(xdr, hdr->taglen + 4); 2462 if (unlikely(!p)) 2463 goto out_overflow; 2464 hdr->tag = (char *)p; 2465 p += XDR_QUADLEN(hdr->taglen); 2466 hdr->nops = be32_to_cpup(p); 2467 if (unlikely(hdr->nops < 1)) 2468 return nfs4_stat_to_errno(hdr->status); 2469 return 0; 2470 out_overflow: 2471 print_overflow_msg(__func__, xdr); 2472 return -EIO; 2473 } 2474 2475 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) 2476 { 2477 __be32 *p; 2478 uint32_t opnum; 2479 int32_t nfserr; 2480 2481 p = xdr_inline_decode(xdr, 8); 2482 if (unlikely(!p)) 2483 goto out_overflow; 2484 opnum = be32_to_cpup(p++); 2485 if (opnum != expected) { 2486 dprintk("nfs: Server returned operation" 2487 " %d but we issued a request for %d\n", 2488 opnum, expected); 2489 return -EIO; 2490 } 2491 nfserr = be32_to_cpup(p); 2492 if (nfserr != NFS_OK) 2493 return nfs4_stat_to_errno(nfserr); 2494 return 0; 2495 out_overflow: 2496 print_overflow_msg(__func__, xdr); 2497 return -EIO; 2498 } 2499 2500 /* Dummy routine */ 2501 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp) 2502 { 2503 __be32 *p; 2504 unsigned int strlen; 2505 char *str; 2506 2507 p = xdr_inline_decode(xdr, 12); 2508 if (likely(p)) 2509 return decode_opaque_inline(xdr, &strlen, &str); 2510 print_overflow_msg(__func__, xdr); 2511 return -EIO; 2512 } 2513 2514 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) 2515 { 2516 uint32_t bmlen; 2517 __be32 *p; 2518 2519 p = xdr_inline_decode(xdr, 4); 2520 if (unlikely(!p)) 2521 goto out_overflow; 2522 bmlen = be32_to_cpup(p); 2523 2524 bitmap[0] = bitmap[1] = 0; 2525 p = xdr_inline_decode(xdr, (bmlen << 2)); 2526 if (unlikely(!p)) 2527 goto out_overflow; 2528 if (bmlen > 0) { 2529 bitmap[0] = be32_to_cpup(p++); 2530 if (bmlen > 1) 2531 bitmap[1] = be32_to_cpup(p); 2532 } 2533 return 0; 2534 out_overflow: 2535 print_overflow_msg(__func__, xdr); 2536 return -EIO; 2537 } 2538 2539 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep) 2540 { 2541 __be32 *p; 2542 2543 p = xdr_inline_decode(xdr, 4); 2544 if (unlikely(!p)) 2545 goto out_overflow; 2546 *attrlen = be32_to_cpup(p); 2547 *savep = xdr->p; 2548 return 0; 2549 out_overflow: 2550 print_overflow_msg(__func__, xdr); 2551 return -EIO; 2552 } 2553 2554 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask) 2555 { 2556 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) { 2557 decode_attr_bitmap(xdr, bitmask); 2558 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS; 2559 } else 2560 bitmask[0] = bitmask[1] = 0; 2561 dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]); 2562 return 0; 2563 } 2564 2565 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type) 2566 { 2567 __be32 *p; 2568 int ret = 0; 2569 2570 *type = 0; 2571 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U))) 2572 return -EIO; 2573 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) { 2574 p = xdr_inline_decode(xdr, 4); 2575 if (unlikely(!p)) 2576 goto out_overflow; 2577 *type = be32_to_cpup(p); 2578 if (*type < NF4REG || *type > NF4NAMEDATTR) { 2579 dprintk("%s: bad type %d\n", __func__, *type); 2580 return -EIO; 2581 } 2582 bitmap[0] &= ~FATTR4_WORD0_TYPE; 2583 ret = NFS_ATTR_FATTR_TYPE; 2584 } 2585 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]); 2586 return ret; 2587 out_overflow: 2588 print_overflow_msg(__func__, xdr); 2589 return -EIO; 2590 } 2591 2592 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change) 2593 { 2594 __be32 *p; 2595 int ret = 0; 2596 2597 *change = 0; 2598 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U))) 2599 return -EIO; 2600 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) { 2601 p = xdr_inline_decode(xdr, 8); 2602 if (unlikely(!p)) 2603 goto out_overflow; 2604 xdr_decode_hyper(p, change); 2605 bitmap[0] &= ~FATTR4_WORD0_CHANGE; 2606 ret = NFS_ATTR_FATTR_CHANGE; 2607 } 2608 dprintk("%s: change attribute=%Lu\n", __func__, 2609 (unsigned long long)*change); 2610 return ret; 2611 out_overflow: 2612 print_overflow_msg(__func__, xdr); 2613 return -EIO; 2614 } 2615 2616 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size) 2617 { 2618 __be32 *p; 2619 int ret = 0; 2620 2621 *size = 0; 2622 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U))) 2623 return -EIO; 2624 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) { 2625 p = xdr_inline_decode(xdr, 8); 2626 if (unlikely(!p)) 2627 goto out_overflow; 2628 xdr_decode_hyper(p, size); 2629 bitmap[0] &= ~FATTR4_WORD0_SIZE; 2630 ret = NFS_ATTR_FATTR_SIZE; 2631 } 2632 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size); 2633 return ret; 2634 out_overflow: 2635 print_overflow_msg(__func__, xdr); 2636 return -EIO; 2637 } 2638 2639 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 2640 { 2641 __be32 *p; 2642 2643 *res = 0; 2644 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U))) 2645 return -EIO; 2646 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) { 2647 p = xdr_inline_decode(xdr, 4); 2648 if (unlikely(!p)) 2649 goto out_overflow; 2650 *res = be32_to_cpup(p); 2651 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT; 2652 } 2653 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true"); 2654 return 0; 2655 out_overflow: 2656 print_overflow_msg(__func__, xdr); 2657 return -EIO; 2658 } 2659 2660 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 2661 { 2662 __be32 *p; 2663 2664 *res = 0; 2665 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U))) 2666 return -EIO; 2667 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) { 2668 p = xdr_inline_decode(xdr, 4); 2669 if (unlikely(!p)) 2670 goto out_overflow; 2671 *res = be32_to_cpup(p); 2672 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT; 2673 } 2674 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true"); 2675 return 0; 2676 out_overflow: 2677 print_overflow_msg(__func__, xdr); 2678 return -EIO; 2679 } 2680 2681 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid) 2682 { 2683 __be32 *p; 2684 int ret = 0; 2685 2686 fsid->major = 0; 2687 fsid->minor = 0; 2688 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U))) 2689 return -EIO; 2690 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) { 2691 p = xdr_inline_decode(xdr, 16); 2692 if (unlikely(!p)) 2693 goto out_overflow; 2694 p = xdr_decode_hyper(p, &fsid->major); 2695 xdr_decode_hyper(p, &fsid->minor); 2696 bitmap[0] &= ~FATTR4_WORD0_FSID; 2697 ret = NFS_ATTR_FATTR_FSID; 2698 } 2699 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__, 2700 (unsigned long long)fsid->major, 2701 (unsigned long long)fsid->minor); 2702 return ret; 2703 out_overflow: 2704 print_overflow_msg(__func__, xdr); 2705 return -EIO; 2706 } 2707 2708 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 2709 { 2710 __be32 *p; 2711 2712 *res = 60; 2713 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U))) 2714 return -EIO; 2715 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) { 2716 p = xdr_inline_decode(xdr, 4); 2717 if (unlikely(!p)) 2718 goto out_overflow; 2719 *res = be32_to_cpup(p); 2720 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME; 2721 } 2722 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res); 2723 return 0; 2724 out_overflow: 2725 print_overflow_msg(__func__, xdr); 2726 return -EIO; 2727 } 2728 2729 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 2730 { 2731 __be32 *p; 2732 2733 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL; 2734 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U))) 2735 return -EIO; 2736 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) { 2737 p = xdr_inline_decode(xdr, 4); 2738 if (unlikely(!p)) 2739 goto out_overflow; 2740 *res = be32_to_cpup(p); 2741 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT; 2742 } 2743 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res); 2744 return 0; 2745 out_overflow: 2746 print_overflow_msg(__func__, xdr); 2747 return -EIO; 2748 } 2749 2750 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid) 2751 { 2752 __be32 *p; 2753 int ret = 0; 2754 2755 *fileid = 0; 2756 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U))) 2757 return -EIO; 2758 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) { 2759 p = xdr_inline_decode(xdr, 8); 2760 if (unlikely(!p)) 2761 goto out_overflow; 2762 xdr_decode_hyper(p, fileid); 2763 bitmap[0] &= ~FATTR4_WORD0_FILEID; 2764 ret = NFS_ATTR_FATTR_FILEID; 2765 } 2766 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid); 2767 return ret; 2768 out_overflow: 2769 print_overflow_msg(__func__, xdr); 2770 return -EIO; 2771 } 2772 2773 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid) 2774 { 2775 __be32 *p; 2776 int ret = 0; 2777 2778 *fileid = 0; 2779 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U))) 2780 return -EIO; 2781 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) { 2782 p = xdr_inline_decode(xdr, 8); 2783 if (unlikely(!p)) 2784 goto out_overflow; 2785 xdr_decode_hyper(p, fileid); 2786 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 2787 ret = NFS_ATTR_FATTR_FILEID; 2788 } 2789 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid); 2790 return ret; 2791 out_overflow: 2792 print_overflow_msg(__func__, xdr); 2793 return -EIO; 2794 } 2795 2796 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2797 { 2798 __be32 *p; 2799 int status = 0; 2800 2801 *res = 0; 2802 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U))) 2803 return -EIO; 2804 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) { 2805 p = xdr_inline_decode(xdr, 8); 2806 if (unlikely(!p)) 2807 goto out_overflow; 2808 xdr_decode_hyper(p, res); 2809 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL; 2810 } 2811 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res); 2812 return status; 2813 out_overflow: 2814 print_overflow_msg(__func__, xdr); 2815 return -EIO; 2816 } 2817 2818 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2819 { 2820 __be32 *p; 2821 int status = 0; 2822 2823 *res = 0; 2824 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U))) 2825 return -EIO; 2826 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) { 2827 p = xdr_inline_decode(xdr, 8); 2828 if (unlikely(!p)) 2829 goto out_overflow; 2830 xdr_decode_hyper(p, res); 2831 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE; 2832 } 2833 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res); 2834 return status; 2835 out_overflow: 2836 print_overflow_msg(__func__, xdr); 2837 return -EIO; 2838 } 2839 2840 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2841 { 2842 __be32 *p; 2843 int status = 0; 2844 2845 *res = 0; 2846 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U))) 2847 return -EIO; 2848 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) { 2849 p = xdr_inline_decode(xdr, 8); 2850 if (unlikely(!p)) 2851 goto out_overflow; 2852 xdr_decode_hyper(p, res); 2853 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL; 2854 } 2855 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res); 2856 return status; 2857 out_overflow: 2858 print_overflow_msg(__func__, xdr); 2859 return -EIO; 2860 } 2861 2862 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path) 2863 { 2864 u32 n; 2865 __be32 *p; 2866 int status = 0; 2867 2868 p = xdr_inline_decode(xdr, 4); 2869 if (unlikely(!p)) 2870 goto out_overflow; 2871 n = be32_to_cpup(p); 2872 if (n == 0) 2873 goto root_path; 2874 dprintk("path "); 2875 path->ncomponents = 0; 2876 while (path->ncomponents < n) { 2877 struct nfs4_string *component = &path->components[path->ncomponents]; 2878 status = decode_opaque_inline(xdr, &component->len, &component->data); 2879 if (unlikely(status != 0)) 2880 goto out_eio; 2881 if (path->ncomponents != n) 2882 dprintk("/"); 2883 dprintk("%s", component->data); 2884 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS) 2885 path->ncomponents++; 2886 else { 2887 dprintk("cannot parse %d components in path\n", n); 2888 goto out_eio; 2889 } 2890 } 2891 out: 2892 dprintk("\n"); 2893 return status; 2894 root_path: 2895 /* a root pathname is sent as a zero component4 */ 2896 path->ncomponents = 1; 2897 path->components[0].len=0; 2898 path->components[0].data=NULL; 2899 dprintk("path /\n"); 2900 goto out; 2901 out_eio: 2902 dprintk(" status %d", status); 2903 status = -EIO; 2904 goto out; 2905 out_overflow: 2906 print_overflow_msg(__func__, xdr); 2907 return -EIO; 2908 } 2909 2910 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res) 2911 { 2912 int n; 2913 __be32 *p; 2914 int status = -EIO; 2915 2916 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U))) 2917 goto out; 2918 status = 0; 2919 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS))) 2920 goto out; 2921 dprintk("%s: fsroot ", __func__); 2922 status = decode_pathname(xdr, &res->fs_path); 2923 if (unlikely(status != 0)) 2924 goto out; 2925 p = xdr_inline_decode(xdr, 4); 2926 if (unlikely(!p)) 2927 goto out_overflow; 2928 n = be32_to_cpup(p); 2929 if (n <= 0) 2930 goto out_eio; 2931 res->nlocations = 0; 2932 while (res->nlocations < n) { 2933 u32 m; 2934 struct nfs4_fs_location *loc = &res->locations[res->nlocations]; 2935 2936 p = xdr_inline_decode(xdr, 4); 2937 if (unlikely(!p)) 2938 goto out_overflow; 2939 m = be32_to_cpup(p); 2940 2941 loc->nservers = 0; 2942 dprintk("%s: servers ", __func__); 2943 while (loc->nservers < m) { 2944 struct nfs4_string *server = &loc->servers[loc->nservers]; 2945 status = decode_opaque_inline(xdr, &server->len, &server->data); 2946 if (unlikely(status != 0)) 2947 goto out_eio; 2948 dprintk("%s ", server->data); 2949 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS) 2950 loc->nservers++; 2951 else { 2952 unsigned int i; 2953 dprintk("%s: using first %u of %u servers " 2954 "returned for location %u\n", 2955 __func__, 2956 NFS4_FS_LOCATION_MAXSERVERS, 2957 m, res->nlocations); 2958 for (i = loc->nservers; i < m; i++) { 2959 unsigned int len; 2960 char *data; 2961 status = decode_opaque_inline(xdr, &len, &data); 2962 if (unlikely(status != 0)) 2963 goto out_eio; 2964 } 2965 } 2966 } 2967 status = decode_pathname(xdr, &loc->rootpath); 2968 if (unlikely(status != 0)) 2969 goto out_eio; 2970 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES) 2971 res->nlocations++; 2972 } 2973 if (res->nlocations != 0) 2974 status = NFS_ATTR_FATTR_V4_REFERRAL; 2975 out: 2976 dprintk("%s: fs_locations done, error = %d\n", __func__, status); 2977 return status; 2978 out_overflow: 2979 print_overflow_msg(__func__, xdr); 2980 out_eio: 2981 status = -EIO; 2982 goto out; 2983 } 2984 2985 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2986 { 2987 __be32 *p; 2988 int status = 0; 2989 2990 *res = 0; 2991 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U))) 2992 return -EIO; 2993 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) { 2994 p = xdr_inline_decode(xdr, 8); 2995 if (unlikely(!p)) 2996 goto out_overflow; 2997 xdr_decode_hyper(p, res); 2998 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE; 2999 } 3000 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res); 3001 return status; 3002 out_overflow: 3003 print_overflow_msg(__func__, xdr); 3004 return -EIO; 3005 } 3006 3007 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink) 3008 { 3009 __be32 *p; 3010 int status = 0; 3011 3012 *maxlink = 1; 3013 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U))) 3014 return -EIO; 3015 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) { 3016 p = xdr_inline_decode(xdr, 4); 3017 if (unlikely(!p)) 3018 goto out_overflow; 3019 *maxlink = be32_to_cpup(p); 3020 bitmap[0] &= ~FATTR4_WORD0_MAXLINK; 3021 } 3022 dprintk("%s: maxlink=%u\n", __func__, *maxlink); 3023 return status; 3024 out_overflow: 3025 print_overflow_msg(__func__, xdr); 3026 return -EIO; 3027 } 3028 3029 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname) 3030 { 3031 __be32 *p; 3032 int status = 0; 3033 3034 *maxname = 1024; 3035 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U))) 3036 return -EIO; 3037 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) { 3038 p = xdr_inline_decode(xdr, 4); 3039 if (unlikely(!p)) 3040 goto out_overflow; 3041 *maxname = be32_to_cpup(p); 3042 bitmap[0] &= ~FATTR4_WORD0_MAXNAME; 3043 } 3044 dprintk("%s: maxname=%u\n", __func__, *maxname); 3045 return status; 3046 out_overflow: 3047 print_overflow_msg(__func__, xdr); 3048 return -EIO; 3049 } 3050 3051 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 3052 { 3053 __be32 *p; 3054 int status = 0; 3055 3056 *res = 1024; 3057 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U))) 3058 return -EIO; 3059 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) { 3060 uint64_t maxread; 3061 p = xdr_inline_decode(xdr, 8); 3062 if (unlikely(!p)) 3063 goto out_overflow; 3064 xdr_decode_hyper(p, &maxread); 3065 if (maxread > 0x7FFFFFFF) 3066 maxread = 0x7FFFFFFF; 3067 *res = (uint32_t)maxread; 3068 bitmap[0] &= ~FATTR4_WORD0_MAXREAD; 3069 } 3070 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res); 3071 return status; 3072 out_overflow: 3073 print_overflow_msg(__func__, xdr); 3074 return -EIO; 3075 } 3076 3077 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res) 3078 { 3079 __be32 *p; 3080 int status = 0; 3081 3082 *res = 1024; 3083 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U))) 3084 return -EIO; 3085 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) { 3086 uint64_t maxwrite; 3087 p = xdr_inline_decode(xdr, 8); 3088 if (unlikely(!p)) 3089 goto out_overflow; 3090 xdr_decode_hyper(p, &maxwrite); 3091 if (maxwrite > 0x7FFFFFFF) 3092 maxwrite = 0x7FFFFFFF; 3093 *res = (uint32_t)maxwrite; 3094 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE; 3095 } 3096 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res); 3097 return status; 3098 out_overflow: 3099 print_overflow_msg(__func__, xdr); 3100 return -EIO; 3101 } 3102 3103 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode) 3104 { 3105 uint32_t tmp; 3106 __be32 *p; 3107 int ret = 0; 3108 3109 *mode = 0; 3110 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U))) 3111 return -EIO; 3112 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) { 3113 p = xdr_inline_decode(xdr, 4); 3114 if (unlikely(!p)) 3115 goto out_overflow; 3116 tmp = be32_to_cpup(p); 3117 *mode = tmp & ~S_IFMT; 3118 bitmap[1] &= ~FATTR4_WORD1_MODE; 3119 ret = NFS_ATTR_FATTR_MODE; 3120 } 3121 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode); 3122 return ret; 3123 out_overflow: 3124 print_overflow_msg(__func__, xdr); 3125 return -EIO; 3126 } 3127 3128 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink) 3129 { 3130 __be32 *p; 3131 int ret = 0; 3132 3133 *nlink = 1; 3134 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U))) 3135 return -EIO; 3136 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) { 3137 p = xdr_inline_decode(xdr, 4); 3138 if (unlikely(!p)) 3139 goto out_overflow; 3140 *nlink = be32_to_cpup(p); 3141 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS; 3142 ret = NFS_ATTR_FATTR_NLINK; 3143 } 3144 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink); 3145 return ret; 3146 out_overflow: 3147 print_overflow_msg(__func__, xdr); 3148 return -EIO; 3149 } 3150 3151 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, 3152 struct nfs_client *clp, uint32_t *uid, int may_sleep) 3153 { 3154 uint32_t len; 3155 __be32 *p; 3156 int ret = 0; 3157 3158 *uid = -2; 3159 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U))) 3160 return -EIO; 3161 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) { 3162 p = xdr_inline_decode(xdr, 4); 3163 if (unlikely(!p)) 3164 goto out_overflow; 3165 len = be32_to_cpup(p); 3166 p = xdr_inline_decode(xdr, len); 3167 if (unlikely(!p)) 3168 goto out_overflow; 3169 if (!may_sleep) { 3170 /* do nothing */ 3171 } else if (len < XDR_MAX_NETOBJ) { 3172 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0) 3173 ret = NFS_ATTR_FATTR_OWNER; 3174 else 3175 dprintk("%s: nfs_map_name_to_uid failed!\n", 3176 __func__); 3177 } else 3178 dprintk("%s: name too long (%u)!\n", 3179 __func__, len); 3180 bitmap[1] &= ~FATTR4_WORD1_OWNER; 3181 } 3182 dprintk("%s: uid=%d\n", __func__, (int)*uid); 3183 return ret; 3184 out_overflow: 3185 print_overflow_msg(__func__, xdr); 3186 return -EIO; 3187 } 3188 3189 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, 3190 struct nfs_client *clp, uint32_t *gid, int may_sleep) 3191 { 3192 uint32_t len; 3193 __be32 *p; 3194 int ret = 0; 3195 3196 *gid = -2; 3197 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U))) 3198 return -EIO; 3199 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) { 3200 p = xdr_inline_decode(xdr, 4); 3201 if (unlikely(!p)) 3202 goto out_overflow; 3203 len = be32_to_cpup(p); 3204 p = xdr_inline_decode(xdr, len); 3205 if (unlikely(!p)) 3206 goto out_overflow; 3207 if (!may_sleep) { 3208 /* do nothing */ 3209 } else if (len < XDR_MAX_NETOBJ) { 3210 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0) 3211 ret = NFS_ATTR_FATTR_GROUP; 3212 else 3213 dprintk("%s: nfs_map_group_to_gid failed!\n", 3214 __func__); 3215 } else 3216 dprintk("%s: name too long (%u)!\n", 3217 __func__, len); 3218 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP; 3219 } 3220 dprintk("%s: gid=%d\n", __func__, (int)*gid); 3221 return ret; 3222 out_overflow: 3223 print_overflow_msg(__func__, xdr); 3224 return -EIO; 3225 } 3226 3227 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev) 3228 { 3229 uint32_t major = 0, minor = 0; 3230 __be32 *p; 3231 int ret = 0; 3232 3233 *rdev = MKDEV(0,0); 3234 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U))) 3235 return -EIO; 3236 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) { 3237 dev_t tmp; 3238 3239 p = xdr_inline_decode(xdr, 8); 3240 if (unlikely(!p)) 3241 goto out_overflow; 3242 major = be32_to_cpup(p++); 3243 minor = be32_to_cpup(p); 3244 tmp = MKDEV(major, minor); 3245 if (MAJOR(tmp) == major && MINOR(tmp) == minor) 3246 *rdev = tmp; 3247 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV; 3248 ret = NFS_ATTR_FATTR_RDEV; 3249 } 3250 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor); 3251 return ret; 3252 out_overflow: 3253 print_overflow_msg(__func__, xdr); 3254 return -EIO; 3255 } 3256 3257 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 3258 { 3259 __be32 *p; 3260 int status = 0; 3261 3262 *res = 0; 3263 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U))) 3264 return -EIO; 3265 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) { 3266 p = xdr_inline_decode(xdr, 8); 3267 if (unlikely(!p)) 3268 goto out_overflow; 3269 xdr_decode_hyper(p, res); 3270 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL; 3271 } 3272 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res); 3273 return status; 3274 out_overflow: 3275 print_overflow_msg(__func__, xdr); 3276 return -EIO; 3277 } 3278 3279 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 3280 { 3281 __be32 *p; 3282 int status = 0; 3283 3284 *res = 0; 3285 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U))) 3286 return -EIO; 3287 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) { 3288 p = xdr_inline_decode(xdr, 8); 3289 if (unlikely(!p)) 3290 goto out_overflow; 3291 xdr_decode_hyper(p, res); 3292 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE; 3293 } 3294 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res); 3295 return status; 3296 out_overflow: 3297 print_overflow_msg(__func__, xdr); 3298 return -EIO; 3299 } 3300 3301 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 3302 { 3303 __be32 *p; 3304 int status = 0; 3305 3306 *res = 0; 3307 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U))) 3308 return -EIO; 3309 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) { 3310 p = xdr_inline_decode(xdr, 8); 3311 if (unlikely(!p)) 3312 goto out_overflow; 3313 xdr_decode_hyper(p, res); 3314 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL; 3315 } 3316 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res); 3317 return status; 3318 out_overflow: 3319 print_overflow_msg(__func__, xdr); 3320 return -EIO; 3321 } 3322 3323 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used) 3324 { 3325 __be32 *p; 3326 int ret = 0; 3327 3328 *used = 0; 3329 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U))) 3330 return -EIO; 3331 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) { 3332 p = xdr_inline_decode(xdr, 8); 3333 if (unlikely(!p)) 3334 goto out_overflow; 3335 xdr_decode_hyper(p, used); 3336 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED; 3337 ret = NFS_ATTR_FATTR_SPACE_USED; 3338 } 3339 dprintk("%s: space used=%Lu\n", __func__, 3340 (unsigned long long)*used); 3341 return ret; 3342 out_overflow: 3343 print_overflow_msg(__func__, xdr); 3344 return -EIO; 3345 } 3346 3347 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time) 3348 { 3349 __be32 *p; 3350 uint64_t sec; 3351 uint32_t nsec; 3352 3353 p = xdr_inline_decode(xdr, 12); 3354 if (unlikely(!p)) 3355 goto out_overflow; 3356 p = xdr_decode_hyper(p, &sec); 3357 nsec = be32_to_cpup(p); 3358 time->tv_sec = (time_t)sec; 3359 time->tv_nsec = (long)nsec; 3360 return 0; 3361 out_overflow: 3362 print_overflow_msg(__func__, xdr); 3363 return -EIO; 3364 } 3365 3366 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) 3367 { 3368 int status = 0; 3369 3370 time->tv_sec = 0; 3371 time->tv_nsec = 0; 3372 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U))) 3373 return -EIO; 3374 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) { 3375 status = decode_attr_time(xdr, time); 3376 if (status == 0) 3377 status = NFS_ATTR_FATTR_ATIME; 3378 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS; 3379 } 3380 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec); 3381 return status; 3382 } 3383 3384 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) 3385 { 3386 int status = 0; 3387 3388 time->tv_sec = 0; 3389 time->tv_nsec = 0; 3390 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U))) 3391 return -EIO; 3392 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) { 3393 status = decode_attr_time(xdr, time); 3394 if (status == 0) 3395 status = NFS_ATTR_FATTR_CTIME; 3396 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA; 3397 } 3398 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec); 3399 return status; 3400 } 3401 3402 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) 3403 { 3404 int status = 0; 3405 3406 time->tv_sec = 0; 3407 time->tv_nsec = 0; 3408 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U))) 3409 return -EIO; 3410 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) { 3411 status = decode_attr_time(xdr, time); 3412 if (status == 0) 3413 status = NFS_ATTR_FATTR_MTIME; 3414 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY; 3415 } 3416 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec); 3417 return status; 3418 } 3419 3420 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen) 3421 { 3422 unsigned int attrwords = XDR_QUADLEN(attrlen); 3423 unsigned int nwords = xdr->p - savep; 3424 3425 if (unlikely(attrwords != nwords)) { 3426 dprintk("%s: server returned incorrect attribute length: " 3427 "%u %c %u\n", 3428 __func__, 3429 attrwords << 2, 3430 (attrwords < nwords) ? '<' : '>', 3431 nwords << 2); 3432 return -EIO; 3433 } 3434 return 0; 3435 } 3436 3437 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) 3438 { 3439 __be32 *p; 3440 3441 p = xdr_inline_decode(xdr, 20); 3442 if (unlikely(!p)) 3443 goto out_overflow; 3444 cinfo->atomic = be32_to_cpup(p++); 3445 p = xdr_decode_hyper(p, &cinfo->before); 3446 xdr_decode_hyper(p, &cinfo->after); 3447 return 0; 3448 out_overflow: 3449 print_overflow_msg(__func__, xdr); 3450 return -EIO; 3451 } 3452 3453 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access) 3454 { 3455 __be32 *p; 3456 uint32_t supp, acc; 3457 int status; 3458 3459 status = decode_op_hdr(xdr, OP_ACCESS); 3460 if (status) 3461 return status; 3462 p = xdr_inline_decode(xdr, 8); 3463 if (unlikely(!p)) 3464 goto out_overflow; 3465 supp = be32_to_cpup(p++); 3466 acc = be32_to_cpup(p); 3467 access->supported = supp; 3468 access->access = acc; 3469 return 0; 3470 out_overflow: 3471 print_overflow_msg(__func__, xdr); 3472 return -EIO; 3473 } 3474 3475 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len) 3476 { 3477 __be32 *p; 3478 3479 p = xdr_inline_decode(xdr, len); 3480 if (likely(p)) { 3481 memcpy(buf, p, len); 3482 return 0; 3483 } 3484 print_overflow_msg(__func__, xdr); 3485 return -EIO; 3486 } 3487 3488 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 3489 { 3490 return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); 3491 } 3492 3493 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res) 3494 { 3495 int status; 3496 3497 status = decode_op_hdr(xdr, OP_CLOSE); 3498 if (status != -EIO) 3499 nfs_increment_open_seqid(status, res->seqid); 3500 if (!status) 3501 status = decode_stateid(xdr, &res->stateid); 3502 return status; 3503 } 3504 3505 static int decode_verifier(struct xdr_stream *xdr, void *verifier) 3506 { 3507 return decode_opaque_fixed(xdr, verifier, 8); 3508 } 3509 3510 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res) 3511 { 3512 int status; 3513 3514 status = decode_op_hdr(xdr, OP_COMMIT); 3515 if (!status) 3516 status = decode_verifier(xdr, res->verf->verifier); 3517 return status; 3518 } 3519 3520 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) 3521 { 3522 __be32 *p; 3523 uint32_t bmlen; 3524 int status; 3525 3526 status = decode_op_hdr(xdr, OP_CREATE); 3527 if (status) 3528 return status; 3529 if ((status = decode_change_info(xdr, cinfo))) 3530 return status; 3531 p = xdr_inline_decode(xdr, 4); 3532 if (unlikely(!p)) 3533 goto out_overflow; 3534 bmlen = be32_to_cpup(p); 3535 p = xdr_inline_decode(xdr, bmlen << 2); 3536 if (likely(p)) 3537 return 0; 3538 out_overflow: 3539 print_overflow_msg(__func__, xdr); 3540 return -EIO; 3541 } 3542 3543 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res) 3544 { 3545 __be32 *savep; 3546 uint32_t attrlen, bitmap[2] = {0}; 3547 int status; 3548 3549 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 3550 goto xdr_error; 3551 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) 3552 goto xdr_error; 3553 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) 3554 goto xdr_error; 3555 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0) 3556 goto xdr_error; 3557 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0) 3558 goto xdr_error; 3559 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0) 3560 goto xdr_error; 3561 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0) 3562 goto xdr_error; 3563 status = verify_attr_len(xdr, savep, attrlen); 3564 xdr_error: 3565 dprintk("%s: xdr returned %d!\n", __func__, -status); 3566 return status; 3567 } 3568 3569 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat) 3570 { 3571 __be32 *savep; 3572 uint32_t attrlen, bitmap[2] = {0}; 3573 int status; 3574 3575 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 3576 goto xdr_error; 3577 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) 3578 goto xdr_error; 3579 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) 3580 goto xdr_error; 3581 3582 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0) 3583 goto xdr_error; 3584 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0) 3585 goto xdr_error; 3586 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0) 3587 goto xdr_error; 3588 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0) 3589 goto xdr_error; 3590 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0) 3591 goto xdr_error; 3592 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0) 3593 goto xdr_error; 3594 3595 status = verify_attr_len(xdr, savep, attrlen); 3596 xdr_error: 3597 dprintk("%s: xdr returned %d!\n", __func__, -status); 3598 return status; 3599 } 3600 3601 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf) 3602 { 3603 __be32 *savep; 3604 uint32_t attrlen, bitmap[2] = {0}; 3605 int status; 3606 3607 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 3608 goto xdr_error; 3609 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) 3610 goto xdr_error; 3611 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) 3612 goto xdr_error; 3613 3614 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0) 3615 goto xdr_error; 3616 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0) 3617 goto xdr_error; 3618 3619 status = verify_attr_len(xdr, savep, attrlen); 3620 xdr_error: 3621 dprintk("%s: xdr returned %d!\n", __func__, -status); 3622 return status; 3623 } 3624 3625 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, 3626 const struct nfs_server *server, int may_sleep) 3627 { 3628 __be32 *savep; 3629 uint32_t attrlen, 3630 bitmap[2] = {0}, 3631 type; 3632 int status; 3633 umode_t fmode = 0; 3634 uint64_t fileid; 3635 3636 status = decode_op_hdr(xdr, OP_GETATTR); 3637 if (status < 0) 3638 goto xdr_error; 3639 3640 status = decode_attr_bitmap(xdr, bitmap); 3641 if (status < 0) 3642 goto xdr_error; 3643 3644 status = decode_attr_length(xdr, &attrlen, &savep); 3645 if (status < 0) 3646 goto xdr_error; 3647 3648 3649 status = decode_attr_type(xdr, bitmap, &type); 3650 if (status < 0) 3651 goto xdr_error; 3652 fattr->mode = 0; 3653 if (status != 0) { 3654 fattr->mode |= nfs_type2fmt[type]; 3655 fattr->valid |= status; 3656 } 3657 3658 status = decode_attr_change(xdr, bitmap, &fattr->change_attr); 3659 if (status < 0) 3660 goto xdr_error; 3661 fattr->valid |= status; 3662 3663 status = decode_attr_size(xdr, bitmap, &fattr->size); 3664 if (status < 0) 3665 goto xdr_error; 3666 fattr->valid |= status; 3667 3668 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid); 3669 if (status < 0) 3670 goto xdr_error; 3671 fattr->valid |= status; 3672 3673 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid); 3674 if (status < 0) 3675 goto xdr_error; 3676 fattr->valid |= status; 3677 3678 status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr, 3679 struct nfs4_fs_locations, 3680 fattr)); 3681 if (status < 0) 3682 goto xdr_error; 3683 fattr->valid |= status; 3684 3685 status = decode_attr_mode(xdr, bitmap, &fmode); 3686 if (status < 0) 3687 goto xdr_error; 3688 if (status != 0) { 3689 fattr->mode |= fmode; 3690 fattr->valid |= status; 3691 } 3692 3693 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink); 3694 if (status < 0) 3695 goto xdr_error; 3696 fattr->valid |= status; 3697 3698 status = decode_attr_owner(xdr, bitmap, server->nfs_client, 3699 &fattr->uid, may_sleep); 3700 if (status < 0) 3701 goto xdr_error; 3702 fattr->valid |= status; 3703 3704 status = decode_attr_group(xdr, bitmap, server->nfs_client, 3705 &fattr->gid, may_sleep); 3706 if (status < 0) 3707 goto xdr_error; 3708 fattr->valid |= status; 3709 3710 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev); 3711 if (status < 0) 3712 goto xdr_error; 3713 fattr->valid |= status; 3714 3715 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used); 3716 if (status < 0) 3717 goto xdr_error; 3718 fattr->valid |= status; 3719 3720 status = decode_attr_time_access(xdr, bitmap, &fattr->atime); 3721 if (status < 0) 3722 goto xdr_error; 3723 fattr->valid |= status; 3724 3725 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime); 3726 if (status < 0) 3727 goto xdr_error; 3728 fattr->valid |= status; 3729 3730 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime); 3731 if (status < 0) 3732 goto xdr_error; 3733 fattr->valid |= status; 3734 3735 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid); 3736 if (status < 0) 3737 goto xdr_error; 3738 if (status != 0 && !(fattr->valid & status)) { 3739 fattr->fileid = fileid; 3740 fattr->valid |= status; 3741 } 3742 3743 status = verify_attr_len(xdr, savep, attrlen); 3744 xdr_error: 3745 dprintk("%s: xdr returned %d\n", __func__, -status); 3746 return status; 3747 } 3748 3749 3750 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) 3751 { 3752 __be32 *savep; 3753 uint32_t attrlen, bitmap[2]; 3754 int status; 3755 3756 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 3757 goto xdr_error; 3758 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) 3759 goto xdr_error; 3760 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) 3761 goto xdr_error; 3762 3763 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */ 3764 3765 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0) 3766 goto xdr_error; 3767 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0) 3768 goto xdr_error; 3769 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0) 3770 goto xdr_error; 3771 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax; 3772 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0) 3773 goto xdr_error; 3774 fsinfo->wtpref = fsinfo->wtmax; 3775 3776 status = verify_attr_len(xdr, savep, attrlen); 3777 xdr_error: 3778 dprintk("%s: xdr returned %d!\n", __func__, -status); 3779 return status; 3780 } 3781 3782 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh) 3783 { 3784 __be32 *p; 3785 uint32_t len; 3786 int status; 3787 3788 /* Zero handle first to allow comparisons */ 3789 memset(fh, 0, sizeof(*fh)); 3790 3791 status = decode_op_hdr(xdr, OP_GETFH); 3792 if (status) 3793 return status; 3794 3795 p = xdr_inline_decode(xdr, 4); 3796 if (unlikely(!p)) 3797 goto out_overflow; 3798 len = be32_to_cpup(p); 3799 if (len > NFS4_FHSIZE) 3800 return -EIO; 3801 fh->size = len; 3802 p = xdr_inline_decode(xdr, len); 3803 if (unlikely(!p)) 3804 goto out_overflow; 3805 memcpy(fh->data, p, len); 3806 return 0; 3807 out_overflow: 3808 print_overflow_msg(__func__, xdr); 3809 return -EIO; 3810 } 3811 3812 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) 3813 { 3814 int status; 3815 3816 status = decode_op_hdr(xdr, OP_LINK); 3817 if (status) 3818 return status; 3819 return decode_change_info(xdr, cinfo); 3820 } 3821 3822 /* 3823 * We create the owner, so we know a proper owner.id length is 4. 3824 */ 3825 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl) 3826 { 3827 uint64_t offset, length, clientid; 3828 __be32 *p; 3829 uint32_t namelen, type; 3830 3831 p = xdr_inline_decode(xdr, 32); 3832 if (unlikely(!p)) 3833 goto out_overflow; 3834 p = xdr_decode_hyper(p, &offset); 3835 p = xdr_decode_hyper(p, &length); 3836 type = be32_to_cpup(p++); 3837 if (fl != NULL) { 3838 fl->fl_start = (loff_t)offset; 3839 fl->fl_end = fl->fl_start + (loff_t)length - 1; 3840 if (length == ~(uint64_t)0) 3841 fl->fl_end = OFFSET_MAX; 3842 fl->fl_type = F_WRLCK; 3843 if (type & 1) 3844 fl->fl_type = F_RDLCK; 3845 fl->fl_pid = 0; 3846 } 3847 p = xdr_decode_hyper(p, &clientid); 3848 namelen = be32_to_cpup(p); 3849 p = xdr_inline_decode(xdr, namelen); 3850 if (likely(p)) 3851 return -NFS4ERR_DENIED; 3852 out_overflow: 3853 print_overflow_msg(__func__, xdr); 3854 return -EIO; 3855 } 3856 3857 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res) 3858 { 3859 int status; 3860 3861 status = decode_op_hdr(xdr, OP_LOCK); 3862 if (status == -EIO) 3863 goto out; 3864 if (status == 0) { 3865 status = decode_stateid(xdr, &res->stateid); 3866 if (unlikely(status)) 3867 goto out; 3868 } else if (status == -NFS4ERR_DENIED) 3869 status = decode_lock_denied(xdr, NULL); 3870 if (res->open_seqid != NULL) 3871 nfs_increment_open_seqid(status, res->open_seqid); 3872 nfs_increment_lock_seqid(status, res->lock_seqid); 3873 out: 3874 return status; 3875 } 3876 3877 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res) 3878 { 3879 int status; 3880 status = decode_op_hdr(xdr, OP_LOCKT); 3881 if (status == -NFS4ERR_DENIED) 3882 return decode_lock_denied(xdr, res->denied); 3883 return status; 3884 } 3885 3886 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res) 3887 { 3888 int status; 3889 3890 status = decode_op_hdr(xdr, OP_LOCKU); 3891 if (status != -EIO) 3892 nfs_increment_lock_seqid(status, res->seqid); 3893 if (status == 0) 3894 status = decode_stateid(xdr, &res->stateid); 3895 return status; 3896 } 3897 3898 static int decode_lookup(struct xdr_stream *xdr) 3899 { 3900 return decode_op_hdr(xdr, OP_LOOKUP); 3901 } 3902 3903 /* This is too sick! */ 3904 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize) 3905 { 3906 __be32 *p; 3907 uint32_t limit_type, nblocks, blocksize; 3908 3909 p = xdr_inline_decode(xdr, 12); 3910 if (unlikely(!p)) 3911 goto out_overflow; 3912 limit_type = be32_to_cpup(p++); 3913 switch (limit_type) { 3914 case 1: 3915 xdr_decode_hyper(p, maxsize); 3916 break; 3917 case 2: 3918 nblocks = be32_to_cpup(p++); 3919 blocksize = be32_to_cpup(p); 3920 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize; 3921 } 3922 return 0; 3923 out_overflow: 3924 print_overflow_msg(__func__, xdr); 3925 return -EIO; 3926 } 3927 3928 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res) 3929 { 3930 __be32 *p; 3931 uint32_t delegation_type; 3932 int status; 3933 3934 p = xdr_inline_decode(xdr, 4); 3935 if (unlikely(!p)) 3936 goto out_overflow; 3937 delegation_type = be32_to_cpup(p); 3938 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) { 3939 res->delegation_type = 0; 3940 return 0; 3941 } 3942 status = decode_stateid(xdr, &res->delegation); 3943 if (unlikely(status)) 3944 return status; 3945 p = xdr_inline_decode(xdr, 4); 3946 if (unlikely(!p)) 3947 goto out_overflow; 3948 res->do_recall = be32_to_cpup(p); 3949 3950 switch (delegation_type) { 3951 case NFS4_OPEN_DELEGATE_READ: 3952 res->delegation_type = FMODE_READ; 3953 break; 3954 case NFS4_OPEN_DELEGATE_WRITE: 3955 res->delegation_type = FMODE_WRITE|FMODE_READ; 3956 if (decode_space_limit(xdr, &res->maxsize) < 0) 3957 return -EIO; 3958 } 3959 return decode_ace(xdr, NULL, res->server->nfs_client); 3960 out_overflow: 3961 print_overflow_msg(__func__, xdr); 3962 return -EIO; 3963 } 3964 3965 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res) 3966 { 3967 __be32 *p; 3968 uint32_t savewords, bmlen, i; 3969 int status; 3970 3971 status = decode_op_hdr(xdr, OP_OPEN); 3972 if (status != -EIO) 3973 nfs_increment_open_seqid(status, res->seqid); 3974 if (!status) 3975 status = decode_stateid(xdr, &res->stateid); 3976 if (unlikely(status)) 3977 return status; 3978 3979 decode_change_info(xdr, &res->cinfo); 3980 3981 p = xdr_inline_decode(xdr, 8); 3982 if (unlikely(!p)) 3983 goto out_overflow; 3984 res->rflags = be32_to_cpup(p++); 3985 bmlen = be32_to_cpup(p); 3986 if (bmlen > 10) 3987 goto xdr_error; 3988 3989 p = xdr_inline_decode(xdr, bmlen << 2); 3990 if (unlikely(!p)) 3991 goto out_overflow; 3992 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE); 3993 for (i = 0; i < savewords; ++i) 3994 res->attrset[i] = be32_to_cpup(p++); 3995 for (; i < NFS4_BITMAP_SIZE; i++) 3996 res->attrset[i] = 0; 3997 3998 return decode_delegation(xdr, res); 3999 xdr_error: 4000 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen); 4001 return -EIO; 4002 out_overflow: 4003 print_overflow_msg(__func__, xdr); 4004 return -EIO; 4005 } 4006 4007 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res) 4008 { 4009 int status; 4010 4011 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM); 4012 if (status != -EIO) 4013 nfs_increment_open_seqid(status, res->seqid); 4014 if (!status) 4015 status = decode_stateid(xdr, &res->stateid); 4016 return status; 4017 } 4018 4019 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res) 4020 { 4021 int status; 4022 4023 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE); 4024 if (status != -EIO) 4025 nfs_increment_open_seqid(status, res->seqid); 4026 if (!status) 4027 status = decode_stateid(xdr, &res->stateid); 4028 return status; 4029 } 4030 4031 static int decode_putfh(struct xdr_stream *xdr) 4032 { 4033 return decode_op_hdr(xdr, OP_PUTFH); 4034 } 4035 4036 static int decode_putrootfh(struct xdr_stream *xdr) 4037 { 4038 return decode_op_hdr(xdr, OP_PUTROOTFH); 4039 } 4040 4041 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res) 4042 { 4043 struct kvec *iov = req->rq_rcv_buf.head; 4044 __be32 *p; 4045 uint32_t count, eof, recvd, hdrlen; 4046 int status; 4047 4048 status = decode_op_hdr(xdr, OP_READ); 4049 if (status) 4050 return status; 4051 p = xdr_inline_decode(xdr, 8); 4052 if (unlikely(!p)) 4053 goto out_overflow; 4054 eof = be32_to_cpup(p++); 4055 count = be32_to_cpup(p); 4056 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 4057 recvd = req->rq_rcv_buf.len - hdrlen; 4058 if (count > recvd) { 4059 dprintk("NFS: server cheating in read reply: " 4060 "count %u > recvd %u\n", count, recvd); 4061 count = recvd; 4062 eof = 0; 4063 } 4064 xdr_read_pages(xdr, count); 4065 res->eof = eof; 4066 res->count = count; 4067 return 0; 4068 out_overflow: 4069 print_overflow_msg(__func__, xdr); 4070 return -EIO; 4071 } 4072 4073 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir) 4074 { 4075 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 4076 struct page *page = *rcvbuf->pages; 4077 struct kvec *iov = rcvbuf->head; 4078 size_t hdrlen; 4079 u32 recvd, pglen = rcvbuf->page_len; 4080 __be32 *end, *entry, *p, *kaddr; 4081 unsigned int nr = 0; 4082 int status; 4083 4084 status = decode_op_hdr(xdr, OP_READDIR); 4085 if (!status) 4086 status = decode_verifier(xdr, readdir->verifier.data); 4087 if (unlikely(status)) 4088 return status; 4089 dprintk("%s: verifier = %08x:%08x\n", 4090 __func__, 4091 ((u32 *)readdir->verifier.data)[0], 4092 ((u32 *)readdir->verifier.data)[1]); 4093 4094 4095 hdrlen = (char *) xdr->p - (char *) iov->iov_base; 4096 recvd = rcvbuf->len - hdrlen; 4097 if (pglen > recvd) 4098 pglen = recvd; 4099 xdr_read_pages(xdr, pglen); 4100 4101 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE); 4102 kaddr = p = kmap_atomic(page, KM_USER0); 4103 end = p + ((pglen + readdir->pgbase) >> 2); 4104 entry = p; 4105 4106 /* Make sure the packet actually has a value_follows and EOF entry */ 4107 if ((entry + 1) > end) 4108 goto short_pkt; 4109 4110 for (; *p++; nr++) { 4111 u32 len, attrlen, xlen; 4112 if (end - p < 3) 4113 goto short_pkt; 4114 dprintk("cookie = %Lu, ", *((unsigned long long *)p)); 4115 p += 2; /* cookie */ 4116 len = ntohl(*p++); /* filename length */ 4117 if (len > NFS4_MAXNAMLEN) { 4118 dprintk("NFS: giant filename in readdir (len 0x%x)\n", 4119 len); 4120 goto err_unmap; 4121 } 4122 xlen = XDR_QUADLEN(len); 4123 if (end - p < xlen + 1) 4124 goto short_pkt; 4125 dprintk("filename = %*s\n", len, (char *)p); 4126 p += xlen; 4127 len = ntohl(*p++); /* bitmap length */ 4128 if (end - p < len + 1) 4129 goto short_pkt; 4130 p += len; 4131 attrlen = XDR_QUADLEN(ntohl(*p++)); 4132 if (end - p < attrlen + 2) 4133 goto short_pkt; 4134 p += attrlen; /* attributes */ 4135 entry = p; 4136 } 4137 /* 4138 * Apparently some server sends responses that are a valid size, but 4139 * contain no entries, and have value_follows==0 and EOF==0. For 4140 * those, just set the EOF marker. 4141 */ 4142 if (!nr && entry[1] == 0) { 4143 dprintk("NFS: readdir reply truncated!\n"); 4144 entry[1] = 1; 4145 } 4146 out: 4147 kunmap_atomic(kaddr, KM_USER0); 4148 return 0; 4149 short_pkt: 4150 /* 4151 * When we get a short packet there are 2 possibilities. We can 4152 * return an error, or fix up the response to look like a valid 4153 * response and return what we have so far. If there are no 4154 * entries and the packet was short, then return -EIO. If there 4155 * are valid entries in the response, return them and pretend that 4156 * the call was successful, but incomplete. The caller can retry the 4157 * readdir starting at the last cookie. 4158 */ 4159 dprintk("%s: short packet at entry %d\n", __func__, nr); 4160 entry[0] = entry[1] = 0; 4161 if (nr) 4162 goto out; 4163 err_unmap: 4164 kunmap_atomic(kaddr, KM_USER0); 4165 return -errno_NFSERR_IO; 4166 } 4167 4168 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) 4169 { 4170 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 4171 struct kvec *iov = rcvbuf->head; 4172 size_t hdrlen; 4173 u32 len, recvd; 4174 __be32 *p; 4175 char *kaddr; 4176 int status; 4177 4178 status = decode_op_hdr(xdr, OP_READLINK); 4179 if (status) 4180 return status; 4181 4182 /* Convert length of symlink */ 4183 p = xdr_inline_decode(xdr, 4); 4184 if (unlikely(!p)) 4185 goto out_overflow; 4186 len = be32_to_cpup(p); 4187 if (len >= rcvbuf->page_len || len <= 0) { 4188 dprintk("nfs: server returned giant symlink!\n"); 4189 return -ENAMETOOLONG; 4190 } 4191 hdrlen = (char *) xdr->p - (char *) iov->iov_base; 4192 recvd = req->rq_rcv_buf.len - hdrlen; 4193 if (recvd < len) { 4194 dprintk("NFS: server cheating in readlink reply: " 4195 "count %u > recvd %u\n", len, recvd); 4196 return -EIO; 4197 } 4198 xdr_read_pages(xdr, len); 4199 /* 4200 * The XDR encode routine has set things up so that 4201 * the link text will be copied directly into the 4202 * buffer. We just have to do overflow-checking, 4203 * and and null-terminate the text (the VFS expects 4204 * null-termination). 4205 */ 4206 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0); 4207 kaddr[len+rcvbuf->page_base] = '\0'; 4208 kunmap_atomic(kaddr, KM_USER0); 4209 return 0; 4210 out_overflow: 4211 print_overflow_msg(__func__, xdr); 4212 return -EIO; 4213 } 4214 4215 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo) 4216 { 4217 int status; 4218 4219 status = decode_op_hdr(xdr, OP_REMOVE); 4220 if (status) 4221 goto out; 4222 status = decode_change_info(xdr, cinfo); 4223 out: 4224 return status; 4225 } 4226 4227 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo, 4228 struct nfs4_change_info *new_cinfo) 4229 { 4230 int status; 4231 4232 status = decode_op_hdr(xdr, OP_RENAME); 4233 if (status) 4234 goto out; 4235 if ((status = decode_change_info(xdr, old_cinfo))) 4236 goto out; 4237 status = decode_change_info(xdr, new_cinfo); 4238 out: 4239 return status; 4240 } 4241 4242 static int decode_renew(struct xdr_stream *xdr) 4243 { 4244 return decode_op_hdr(xdr, OP_RENEW); 4245 } 4246 4247 static int 4248 decode_restorefh(struct xdr_stream *xdr) 4249 { 4250 return decode_op_hdr(xdr, OP_RESTOREFH); 4251 } 4252 4253 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, 4254 size_t *acl_len) 4255 { 4256 __be32 *savep; 4257 uint32_t attrlen, 4258 bitmap[2] = {0}; 4259 struct kvec *iov = req->rq_rcv_buf.head; 4260 int status; 4261 4262 *acl_len = 0; 4263 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 4264 goto out; 4265 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) 4266 goto out; 4267 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) 4268 goto out; 4269 4270 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) 4271 return -EIO; 4272 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { 4273 size_t hdrlen; 4274 u32 recvd; 4275 4276 /* We ignore &savep and don't do consistency checks on 4277 * the attr length. Let userspace figure it out.... */ 4278 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base; 4279 recvd = req->rq_rcv_buf.len - hdrlen; 4280 if (attrlen > recvd) { 4281 dprintk("NFS: server cheating in getattr" 4282 " acl reply: attrlen %u > recvd %u\n", 4283 attrlen, recvd); 4284 return -EINVAL; 4285 } 4286 xdr_read_pages(xdr, attrlen); 4287 *acl_len = attrlen; 4288 } else 4289 status = -EOPNOTSUPP; 4290 4291 out: 4292 return status; 4293 } 4294 4295 static int 4296 decode_savefh(struct xdr_stream *xdr) 4297 { 4298 return decode_op_hdr(xdr, OP_SAVEFH); 4299 } 4300 4301 static int decode_setattr(struct xdr_stream *xdr) 4302 { 4303 __be32 *p; 4304 uint32_t bmlen; 4305 int status; 4306 4307 status = decode_op_hdr(xdr, OP_SETATTR); 4308 if (status) 4309 return status; 4310 p = xdr_inline_decode(xdr, 4); 4311 if (unlikely(!p)) 4312 goto out_overflow; 4313 bmlen = be32_to_cpup(p); 4314 p = xdr_inline_decode(xdr, bmlen << 2); 4315 if (likely(p)) 4316 return 0; 4317 out_overflow: 4318 print_overflow_msg(__func__, xdr); 4319 return -EIO; 4320 } 4321 4322 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp) 4323 { 4324 __be32 *p; 4325 uint32_t opnum; 4326 int32_t nfserr; 4327 4328 p = xdr_inline_decode(xdr, 8); 4329 if (unlikely(!p)) 4330 goto out_overflow; 4331 opnum = be32_to_cpup(p++); 4332 if (opnum != OP_SETCLIENTID) { 4333 dprintk("nfs: decode_setclientid: Server returned operation" 4334 " %d\n", opnum); 4335 return -EIO; 4336 } 4337 nfserr = be32_to_cpup(p); 4338 if (nfserr == NFS_OK) { 4339 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE); 4340 if (unlikely(!p)) 4341 goto out_overflow; 4342 p = xdr_decode_hyper(p, &clp->cl_clientid); 4343 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE); 4344 } else if (nfserr == NFSERR_CLID_INUSE) { 4345 uint32_t len; 4346 4347 /* skip netid string */ 4348 p = xdr_inline_decode(xdr, 4); 4349 if (unlikely(!p)) 4350 goto out_overflow; 4351 len = be32_to_cpup(p); 4352 p = xdr_inline_decode(xdr, len); 4353 if (unlikely(!p)) 4354 goto out_overflow; 4355 4356 /* skip uaddr string */ 4357 p = xdr_inline_decode(xdr, 4); 4358 if (unlikely(!p)) 4359 goto out_overflow; 4360 len = be32_to_cpup(p); 4361 p = xdr_inline_decode(xdr, len); 4362 if (unlikely(!p)) 4363 goto out_overflow; 4364 return -NFSERR_CLID_INUSE; 4365 } else 4366 return nfs4_stat_to_errno(nfserr); 4367 4368 return 0; 4369 out_overflow: 4370 print_overflow_msg(__func__, xdr); 4371 return -EIO; 4372 } 4373 4374 static int decode_setclientid_confirm(struct xdr_stream *xdr) 4375 { 4376 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM); 4377 } 4378 4379 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res) 4380 { 4381 __be32 *p; 4382 int status; 4383 4384 status = decode_op_hdr(xdr, OP_WRITE); 4385 if (status) 4386 return status; 4387 4388 p = xdr_inline_decode(xdr, 16); 4389 if (unlikely(!p)) 4390 goto out_overflow; 4391 res->count = be32_to_cpup(p++); 4392 res->verf->committed = be32_to_cpup(p++); 4393 memcpy(res->verf->verifier, p, 8); 4394 return 0; 4395 out_overflow: 4396 print_overflow_msg(__func__, xdr); 4397 return -EIO; 4398 } 4399 4400 static int decode_delegreturn(struct xdr_stream *xdr) 4401 { 4402 return decode_op_hdr(xdr, OP_DELEGRETURN); 4403 } 4404 4405 #if defined(CONFIG_NFS_V4_1) 4406 static int decode_exchange_id(struct xdr_stream *xdr, 4407 struct nfs41_exchange_id_res *res) 4408 { 4409 __be32 *p; 4410 uint32_t dummy; 4411 char *dummy_str; 4412 int status; 4413 struct nfs_client *clp = res->client; 4414 4415 status = decode_op_hdr(xdr, OP_EXCHANGE_ID); 4416 if (status) 4417 return status; 4418 4419 p = xdr_inline_decode(xdr, 8); 4420 if (unlikely(!p)) 4421 goto out_overflow; 4422 xdr_decode_hyper(p, &clp->cl_ex_clid); 4423 p = xdr_inline_decode(xdr, 12); 4424 if (unlikely(!p)) 4425 goto out_overflow; 4426 clp->cl_seqid = be32_to_cpup(p++); 4427 clp->cl_exchange_flags = be32_to_cpup(p++); 4428 4429 /* We ask for SP4_NONE */ 4430 dummy = be32_to_cpup(p); 4431 if (dummy != SP4_NONE) 4432 return -EIO; 4433 4434 /* Throw away minor_id */ 4435 p = xdr_inline_decode(xdr, 8); 4436 if (unlikely(!p)) 4437 goto out_overflow; 4438 4439 /* Throw away Major id */ 4440 status = decode_opaque_inline(xdr, &dummy, &dummy_str); 4441 if (unlikely(status)) 4442 return status; 4443 4444 /* Throw away server_scope */ 4445 status = decode_opaque_inline(xdr, &dummy, &dummy_str); 4446 if (unlikely(status)) 4447 return status; 4448 4449 /* Throw away Implementation id array */ 4450 status = decode_opaque_inline(xdr, &dummy, &dummy_str); 4451 if (unlikely(status)) 4452 return status; 4453 4454 return 0; 4455 out_overflow: 4456 print_overflow_msg(__func__, xdr); 4457 return -EIO; 4458 } 4459 4460 static int decode_chan_attrs(struct xdr_stream *xdr, 4461 struct nfs4_channel_attrs *attrs) 4462 { 4463 __be32 *p; 4464 u32 nr_attrs; 4465 4466 p = xdr_inline_decode(xdr, 28); 4467 if (unlikely(!p)) 4468 goto out_overflow; 4469 attrs->headerpadsz = be32_to_cpup(p++); 4470 attrs->max_rqst_sz = be32_to_cpup(p++); 4471 attrs->max_resp_sz = be32_to_cpup(p++); 4472 attrs->max_resp_sz_cached = be32_to_cpup(p++); 4473 attrs->max_ops = be32_to_cpup(p++); 4474 attrs->max_reqs = be32_to_cpup(p++); 4475 nr_attrs = be32_to_cpup(p); 4476 if (unlikely(nr_attrs > 1)) { 4477 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n", 4478 __func__, nr_attrs); 4479 return -EINVAL; 4480 } 4481 if (nr_attrs == 1) { 4482 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */ 4483 if (unlikely(!p)) 4484 goto out_overflow; 4485 } 4486 return 0; 4487 out_overflow: 4488 print_overflow_msg(__func__, xdr); 4489 return -EIO; 4490 } 4491 4492 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid) 4493 { 4494 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN); 4495 } 4496 4497 static int decode_create_session(struct xdr_stream *xdr, 4498 struct nfs41_create_session_res *res) 4499 { 4500 __be32 *p; 4501 int status; 4502 struct nfs_client *clp = res->client; 4503 struct nfs4_session *session = clp->cl_session; 4504 4505 status = decode_op_hdr(xdr, OP_CREATE_SESSION); 4506 if (!status) 4507 status = decode_sessionid(xdr, &session->sess_id); 4508 if (unlikely(status)) 4509 return status; 4510 4511 /* seqid, flags */ 4512 p = xdr_inline_decode(xdr, 8); 4513 if (unlikely(!p)) 4514 goto out_overflow; 4515 clp->cl_seqid = be32_to_cpup(p++); 4516 session->flags = be32_to_cpup(p); 4517 4518 /* Channel attributes */ 4519 status = decode_chan_attrs(xdr, &session->fc_attrs); 4520 if (!status) 4521 status = decode_chan_attrs(xdr, &session->bc_attrs); 4522 return status; 4523 out_overflow: 4524 print_overflow_msg(__func__, xdr); 4525 return -EIO; 4526 } 4527 4528 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy) 4529 { 4530 return decode_op_hdr(xdr, OP_DESTROY_SESSION); 4531 } 4532 #endif /* CONFIG_NFS_V4_1 */ 4533 4534 static int decode_sequence(struct xdr_stream *xdr, 4535 struct nfs4_sequence_res *res, 4536 struct rpc_rqst *rqstp) 4537 { 4538 #if defined(CONFIG_NFS_V4_1) 4539 struct nfs4_slot *slot; 4540 struct nfs4_sessionid id; 4541 u32 dummy; 4542 int status; 4543 __be32 *p; 4544 4545 if (!res->sr_session) 4546 return 0; 4547 4548 status = decode_op_hdr(xdr, OP_SEQUENCE); 4549 if (!status) 4550 status = decode_sessionid(xdr, &id); 4551 if (unlikely(status)) 4552 goto out_err; 4553 4554 /* 4555 * If the server returns different values for sessionID, slotID or 4556 * sequence number, the server is looney tunes. 4557 */ 4558 status = -ESERVERFAULT; 4559 4560 if (memcmp(id.data, res->sr_session->sess_id.data, 4561 NFS4_MAX_SESSIONID_LEN)) { 4562 dprintk("%s Invalid session id\n", __func__); 4563 goto out_err; 4564 } 4565 4566 p = xdr_inline_decode(xdr, 20); 4567 if (unlikely(!p)) 4568 goto out_overflow; 4569 4570 /* seqid */ 4571 slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid]; 4572 dummy = be32_to_cpup(p++); 4573 if (dummy != slot->seq_nr) { 4574 dprintk("%s Invalid sequence number\n", __func__); 4575 goto out_err; 4576 } 4577 /* slot id */ 4578 dummy = be32_to_cpup(p++); 4579 if (dummy != res->sr_slotid) { 4580 dprintk("%s Invalid slot id\n", __func__); 4581 goto out_err; 4582 } 4583 /* highest slot id - currently not processed */ 4584 dummy = be32_to_cpup(p++); 4585 /* target highest slot id - currently not processed */ 4586 dummy = be32_to_cpup(p++); 4587 /* result flags - currently not processed */ 4588 dummy = be32_to_cpup(p); 4589 status = 0; 4590 out_err: 4591 res->sr_status = status; 4592 return status; 4593 out_overflow: 4594 print_overflow_msg(__func__, xdr); 4595 status = -EIO; 4596 goto out_err; 4597 #else /* CONFIG_NFS_V4_1 */ 4598 return 0; 4599 #endif /* CONFIG_NFS_V4_1 */ 4600 } 4601 4602 /* 4603 * END OF "GENERIC" DECODE ROUTINES. 4604 */ 4605 4606 /* 4607 * Decode OPEN_DOWNGRADE response 4608 */ 4609 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) 4610 { 4611 struct xdr_stream xdr; 4612 struct compound_hdr hdr; 4613 int status; 4614 4615 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4616 status = decode_compound_hdr(&xdr, &hdr); 4617 if (status) 4618 goto out; 4619 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4620 if (status) 4621 goto out; 4622 status = decode_putfh(&xdr); 4623 if (status) 4624 goto out; 4625 status = decode_open_downgrade(&xdr, res); 4626 if (status != 0) 4627 goto out; 4628 decode_getfattr(&xdr, res->fattr, res->server, 4629 !RPC_IS_ASYNC(rqstp->rq_task)); 4630 out: 4631 return status; 4632 } 4633 4634 /* 4635 * Decode ACCESS response 4636 */ 4637 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res) 4638 { 4639 struct xdr_stream xdr; 4640 struct compound_hdr hdr; 4641 int status; 4642 4643 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4644 status = decode_compound_hdr(&xdr, &hdr); 4645 if (status) 4646 goto out; 4647 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4648 if (status) 4649 goto out; 4650 status = decode_putfh(&xdr); 4651 if (status != 0) 4652 goto out; 4653 status = decode_access(&xdr, res); 4654 if (status != 0) 4655 goto out; 4656 decode_getfattr(&xdr, res->fattr, res->server, 4657 !RPC_IS_ASYNC(rqstp->rq_task)); 4658 out: 4659 return status; 4660 } 4661 4662 /* 4663 * Decode LOOKUP response 4664 */ 4665 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) 4666 { 4667 struct xdr_stream xdr; 4668 struct compound_hdr hdr; 4669 int status; 4670 4671 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4672 status = decode_compound_hdr(&xdr, &hdr); 4673 if (status) 4674 goto out; 4675 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4676 if (status) 4677 goto out; 4678 if ((status = decode_putfh(&xdr)) != 0) 4679 goto out; 4680 if ((status = decode_lookup(&xdr)) != 0) 4681 goto out; 4682 if ((status = decode_getfh(&xdr, res->fh)) != 0) 4683 goto out; 4684 status = decode_getfattr(&xdr, res->fattr, res->server 4685 ,!RPC_IS_ASYNC(rqstp->rq_task)); 4686 out: 4687 return status; 4688 } 4689 4690 /* 4691 * Decode LOOKUP_ROOT response 4692 */ 4693 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) 4694 { 4695 struct xdr_stream xdr; 4696 struct compound_hdr hdr; 4697 int status; 4698 4699 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4700 status = decode_compound_hdr(&xdr, &hdr); 4701 if (status) 4702 goto out; 4703 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4704 if (status) 4705 goto out; 4706 if ((status = decode_putrootfh(&xdr)) != 0) 4707 goto out; 4708 if ((status = decode_getfh(&xdr, res->fh)) == 0) 4709 status = decode_getfattr(&xdr, res->fattr, res->server, 4710 !RPC_IS_ASYNC(rqstp->rq_task)); 4711 out: 4712 return status; 4713 } 4714 4715 /* 4716 * Decode REMOVE response 4717 */ 4718 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res) 4719 { 4720 struct xdr_stream xdr; 4721 struct compound_hdr hdr; 4722 int status; 4723 4724 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4725 status = decode_compound_hdr(&xdr, &hdr); 4726 if (status) 4727 goto out; 4728 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4729 if (status) 4730 goto out; 4731 if ((status = decode_putfh(&xdr)) != 0) 4732 goto out; 4733 if ((status = decode_remove(&xdr, &res->cinfo)) != 0) 4734 goto out; 4735 decode_getfattr(&xdr, &res->dir_attr, res->server, 4736 !RPC_IS_ASYNC(rqstp->rq_task)); 4737 out: 4738 return status; 4739 } 4740 4741 /* 4742 * Decode RENAME response 4743 */ 4744 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res) 4745 { 4746 struct xdr_stream xdr; 4747 struct compound_hdr hdr; 4748 int status; 4749 4750 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4751 status = decode_compound_hdr(&xdr, &hdr); 4752 if (status) 4753 goto out; 4754 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4755 if (status) 4756 goto out; 4757 if ((status = decode_putfh(&xdr)) != 0) 4758 goto out; 4759 if ((status = decode_savefh(&xdr)) != 0) 4760 goto out; 4761 if ((status = decode_putfh(&xdr)) != 0) 4762 goto out; 4763 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0) 4764 goto out; 4765 /* Current FH is target directory */ 4766 if (decode_getfattr(&xdr, res->new_fattr, res->server, 4767 !RPC_IS_ASYNC(rqstp->rq_task)) != 0) 4768 goto out; 4769 if ((status = decode_restorefh(&xdr)) != 0) 4770 goto out; 4771 decode_getfattr(&xdr, res->old_fattr, res->server, 4772 !RPC_IS_ASYNC(rqstp->rq_task)); 4773 out: 4774 return status; 4775 } 4776 4777 /* 4778 * Decode LINK response 4779 */ 4780 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res) 4781 { 4782 struct xdr_stream xdr; 4783 struct compound_hdr hdr; 4784 int status; 4785 4786 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4787 status = decode_compound_hdr(&xdr, &hdr); 4788 if (status) 4789 goto out; 4790 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4791 if (status) 4792 goto out; 4793 if ((status = decode_putfh(&xdr)) != 0) 4794 goto out; 4795 if ((status = decode_savefh(&xdr)) != 0) 4796 goto out; 4797 if ((status = decode_putfh(&xdr)) != 0) 4798 goto out; 4799 if ((status = decode_link(&xdr, &res->cinfo)) != 0) 4800 goto out; 4801 /* 4802 * Note order: OP_LINK leaves the directory as the current 4803 * filehandle. 4804 */ 4805 if (decode_getfattr(&xdr, res->dir_attr, res->server, 4806 !RPC_IS_ASYNC(rqstp->rq_task)) != 0) 4807 goto out; 4808 if ((status = decode_restorefh(&xdr)) != 0) 4809 goto out; 4810 decode_getfattr(&xdr, res->fattr, res->server, 4811 !RPC_IS_ASYNC(rqstp->rq_task)); 4812 out: 4813 return status; 4814 } 4815 4816 /* 4817 * Decode CREATE response 4818 */ 4819 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) 4820 { 4821 struct xdr_stream xdr; 4822 struct compound_hdr hdr; 4823 int status; 4824 4825 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4826 status = decode_compound_hdr(&xdr, &hdr); 4827 if (status) 4828 goto out; 4829 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4830 if (status) 4831 goto out; 4832 if ((status = decode_putfh(&xdr)) != 0) 4833 goto out; 4834 if ((status = decode_savefh(&xdr)) != 0) 4835 goto out; 4836 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0) 4837 goto out; 4838 if ((status = decode_getfh(&xdr, res->fh)) != 0) 4839 goto out; 4840 if (decode_getfattr(&xdr, res->fattr, res->server, 4841 !RPC_IS_ASYNC(rqstp->rq_task)) != 0) 4842 goto out; 4843 if ((status = decode_restorefh(&xdr)) != 0) 4844 goto out; 4845 decode_getfattr(&xdr, res->dir_fattr, res->server, 4846 !RPC_IS_ASYNC(rqstp->rq_task)); 4847 out: 4848 return status; 4849 } 4850 4851 /* 4852 * Decode SYMLINK response 4853 */ 4854 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) 4855 { 4856 return nfs4_xdr_dec_create(rqstp, p, res); 4857 } 4858 4859 /* 4860 * Decode GETATTR response 4861 */ 4862 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res) 4863 { 4864 struct xdr_stream xdr; 4865 struct compound_hdr hdr; 4866 int status; 4867 4868 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4869 status = decode_compound_hdr(&xdr, &hdr); 4870 if (status) 4871 goto out; 4872 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4873 if (status) 4874 goto out; 4875 status = decode_putfh(&xdr); 4876 if (status) 4877 goto out; 4878 status = decode_getfattr(&xdr, res->fattr, res->server, 4879 !RPC_IS_ASYNC(rqstp->rq_task)); 4880 out: 4881 return status; 4882 } 4883 4884 /* 4885 * Encode an SETACL request 4886 */ 4887 static int 4888 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args) 4889 { 4890 struct xdr_stream xdr; 4891 struct compound_hdr hdr = { 4892 .minorversion = nfs4_xdr_minorversion(&args->seq_args), 4893 }; 4894 int status; 4895 4896 xdr_init_encode(&xdr, &req->rq_snd_buf, p); 4897 encode_compound_hdr(&xdr, req, &hdr); 4898 encode_sequence(&xdr, &args->seq_args, &hdr); 4899 encode_putfh(&xdr, args->fh, &hdr); 4900 status = encode_setacl(&xdr, args, &hdr); 4901 encode_nops(&hdr); 4902 return status; 4903 } 4904 4905 /* 4906 * Decode SETACL response 4907 */ 4908 static int 4909 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, 4910 struct nfs_setaclres *res) 4911 { 4912 struct xdr_stream xdr; 4913 struct compound_hdr hdr; 4914 int status; 4915 4916 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4917 status = decode_compound_hdr(&xdr, &hdr); 4918 if (status) 4919 goto out; 4920 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4921 if (status) 4922 goto out; 4923 status = decode_putfh(&xdr); 4924 if (status) 4925 goto out; 4926 status = decode_setattr(&xdr); 4927 out: 4928 return status; 4929 } 4930 4931 /* 4932 * Decode GETACL response 4933 */ 4934 static int 4935 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, 4936 struct nfs_getaclres *res) 4937 { 4938 struct xdr_stream xdr; 4939 struct compound_hdr hdr; 4940 int status; 4941 4942 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4943 status = decode_compound_hdr(&xdr, &hdr); 4944 if (status) 4945 goto out; 4946 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4947 if (status) 4948 goto out; 4949 status = decode_putfh(&xdr); 4950 if (status) 4951 goto out; 4952 status = decode_getacl(&xdr, rqstp, &res->acl_len); 4953 4954 out: 4955 return status; 4956 } 4957 4958 /* 4959 * Decode CLOSE response 4960 */ 4961 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) 4962 { 4963 struct xdr_stream xdr; 4964 struct compound_hdr hdr; 4965 int status; 4966 4967 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 4968 status = decode_compound_hdr(&xdr, &hdr); 4969 if (status) 4970 goto out; 4971 status = decode_sequence(&xdr, &res->seq_res, rqstp); 4972 if (status) 4973 goto out; 4974 status = decode_putfh(&xdr); 4975 if (status) 4976 goto out; 4977 status = decode_close(&xdr, res); 4978 if (status != 0) 4979 goto out; 4980 /* 4981 * Note: Server may do delete on close for this file 4982 * in which case the getattr call will fail with 4983 * an ESTALE error. Shouldn't be a problem, 4984 * though, since fattr->valid will remain unset. 4985 */ 4986 decode_getfattr(&xdr, res->fattr, res->server, 4987 !RPC_IS_ASYNC(rqstp->rq_task)); 4988 out: 4989 return status; 4990 } 4991 4992 /* 4993 * Decode OPEN response 4994 */ 4995 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) 4996 { 4997 struct xdr_stream xdr; 4998 struct compound_hdr hdr; 4999 int status; 5000 5001 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5002 status = decode_compound_hdr(&xdr, &hdr); 5003 if (status) 5004 goto out; 5005 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5006 if (status) 5007 goto out; 5008 status = decode_putfh(&xdr); 5009 if (status) 5010 goto out; 5011 status = decode_savefh(&xdr); 5012 if (status) 5013 goto out; 5014 status = decode_open(&xdr, res); 5015 if (status) 5016 goto out; 5017 if (decode_getfh(&xdr, &res->fh) != 0) 5018 goto out; 5019 if (decode_getfattr(&xdr, res->f_attr, res->server, 5020 !RPC_IS_ASYNC(rqstp->rq_task)) != 0) 5021 goto out; 5022 if (decode_restorefh(&xdr) != 0) 5023 goto out; 5024 decode_getfattr(&xdr, res->dir_attr, res->server, 5025 !RPC_IS_ASYNC(rqstp->rq_task)); 5026 out: 5027 return status; 5028 } 5029 5030 /* 5031 * Decode OPEN_CONFIRM response 5032 */ 5033 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res) 5034 { 5035 struct xdr_stream xdr; 5036 struct compound_hdr hdr; 5037 int status; 5038 5039 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5040 status = decode_compound_hdr(&xdr, &hdr); 5041 if (status) 5042 goto out; 5043 status = decode_putfh(&xdr); 5044 if (status) 5045 goto out; 5046 status = decode_open_confirm(&xdr, res); 5047 out: 5048 return status; 5049 } 5050 5051 /* 5052 * Decode OPEN response 5053 */ 5054 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) 5055 { 5056 struct xdr_stream xdr; 5057 struct compound_hdr hdr; 5058 int status; 5059 5060 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5061 status = decode_compound_hdr(&xdr, &hdr); 5062 if (status) 5063 goto out; 5064 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5065 if (status) 5066 goto out; 5067 status = decode_putfh(&xdr); 5068 if (status) 5069 goto out; 5070 status = decode_open(&xdr, res); 5071 if (status) 5072 goto out; 5073 decode_getfattr(&xdr, res->f_attr, res->server, 5074 !RPC_IS_ASYNC(rqstp->rq_task)); 5075 out: 5076 return status; 5077 } 5078 5079 /* 5080 * Decode SETATTR response 5081 */ 5082 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res) 5083 { 5084 struct xdr_stream xdr; 5085 struct compound_hdr hdr; 5086 int status; 5087 5088 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5089 status = decode_compound_hdr(&xdr, &hdr); 5090 if (status) 5091 goto out; 5092 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5093 if (status) 5094 goto out; 5095 status = decode_putfh(&xdr); 5096 if (status) 5097 goto out; 5098 status = decode_setattr(&xdr); 5099 if (status) 5100 goto out; 5101 decode_getfattr(&xdr, res->fattr, res->server, 5102 !RPC_IS_ASYNC(rqstp->rq_task)); 5103 out: 5104 return status; 5105 } 5106 5107 /* 5108 * Decode LOCK response 5109 */ 5110 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res) 5111 { 5112 struct xdr_stream xdr; 5113 struct compound_hdr hdr; 5114 int status; 5115 5116 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5117 status = decode_compound_hdr(&xdr, &hdr); 5118 if (status) 5119 goto out; 5120 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5121 if (status) 5122 goto out; 5123 status = decode_putfh(&xdr); 5124 if (status) 5125 goto out; 5126 status = decode_lock(&xdr, res); 5127 out: 5128 return status; 5129 } 5130 5131 /* 5132 * Decode LOCKT response 5133 */ 5134 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res) 5135 { 5136 struct xdr_stream xdr; 5137 struct compound_hdr hdr; 5138 int status; 5139 5140 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5141 status = decode_compound_hdr(&xdr, &hdr); 5142 if (status) 5143 goto out; 5144 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5145 if (status) 5146 goto out; 5147 status = decode_putfh(&xdr); 5148 if (status) 5149 goto out; 5150 status = decode_lockt(&xdr, res); 5151 out: 5152 return status; 5153 } 5154 5155 /* 5156 * Decode LOCKU response 5157 */ 5158 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res) 5159 { 5160 struct xdr_stream xdr; 5161 struct compound_hdr hdr; 5162 int status; 5163 5164 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5165 status = decode_compound_hdr(&xdr, &hdr); 5166 if (status) 5167 goto out; 5168 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5169 if (status) 5170 goto out; 5171 status = decode_putfh(&xdr); 5172 if (status) 5173 goto out; 5174 status = decode_locku(&xdr, res); 5175 out: 5176 return status; 5177 } 5178 5179 /* 5180 * Decode READLINK response 5181 */ 5182 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, 5183 struct nfs4_readlink_res *res) 5184 { 5185 struct xdr_stream xdr; 5186 struct compound_hdr hdr; 5187 int status; 5188 5189 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5190 status = decode_compound_hdr(&xdr, &hdr); 5191 if (status) 5192 goto out; 5193 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5194 if (status) 5195 goto out; 5196 status = decode_putfh(&xdr); 5197 if (status) 5198 goto out; 5199 status = decode_readlink(&xdr, rqstp); 5200 out: 5201 return status; 5202 } 5203 5204 /* 5205 * Decode READDIR response 5206 */ 5207 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res) 5208 { 5209 struct xdr_stream xdr; 5210 struct compound_hdr hdr; 5211 int status; 5212 5213 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5214 status = decode_compound_hdr(&xdr, &hdr); 5215 if (status) 5216 goto out; 5217 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5218 if (status) 5219 goto out; 5220 status = decode_putfh(&xdr); 5221 if (status) 5222 goto out; 5223 status = decode_readdir(&xdr, rqstp, res); 5224 out: 5225 return status; 5226 } 5227 5228 /* 5229 * Decode Read response 5230 */ 5231 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res) 5232 { 5233 struct xdr_stream xdr; 5234 struct compound_hdr hdr; 5235 int status; 5236 5237 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5238 status = decode_compound_hdr(&xdr, &hdr); 5239 if (status) 5240 goto out; 5241 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5242 if (status) 5243 goto out; 5244 status = decode_putfh(&xdr); 5245 if (status) 5246 goto out; 5247 status = decode_read(&xdr, rqstp, res); 5248 if (!status) 5249 status = res->count; 5250 out: 5251 return status; 5252 } 5253 5254 /* 5255 * Decode WRITE response 5256 */ 5257 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) 5258 { 5259 struct xdr_stream xdr; 5260 struct compound_hdr hdr; 5261 int status; 5262 5263 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5264 status = decode_compound_hdr(&xdr, &hdr); 5265 if (status) 5266 goto out; 5267 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5268 if (status) 5269 goto out; 5270 status = decode_putfh(&xdr); 5271 if (status) 5272 goto out; 5273 status = decode_write(&xdr, res); 5274 if (status) 5275 goto out; 5276 decode_getfattr(&xdr, res->fattr, res->server, 5277 !RPC_IS_ASYNC(rqstp->rq_task)); 5278 if (!status) 5279 status = res->count; 5280 out: 5281 return status; 5282 } 5283 5284 /* 5285 * Decode COMMIT response 5286 */ 5287 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) 5288 { 5289 struct xdr_stream xdr; 5290 struct compound_hdr hdr; 5291 int status; 5292 5293 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5294 status = decode_compound_hdr(&xdr, &hdr); 5295 if (status) 5296 goto out; 5297 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5298 if (status) 5299 goto out; 5300 status = decode_putfh(&xdr); 5301 if (status) 5302 goto out; 5303 status = decode_commit(&xdr, res); 5304 if (status) 5305 goto out; 5306 decode_getfattr(&xdr, res->fattr, res->server, 5307 !RPC_IS_ASYNC(rqstp->rq_task)); 5308 out: 5309 return status; 5310 } 5311 5312 /* 5313 * FSINFO request 5314 */ 5315 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, 5316 struct nfs4_fsinfo_res *res) 5317 { 5318 struct xdr_stream xdr; 5319 struct compound_hdr hdr; 5320 int status; 5321 5322 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5323 status = decode_compound_hdr(&xdr, &hdr); 5324 if (!status) 5325 status = decode_sequence(&xdr, &res->seq_res, req); 5326 if (!status) 5327 status = decode_putfh(&xdr); 5328 if (!status) 5329 status = decode_fsinfo(&xdr, res->fsinfo); 5330 return status; 5331 } 5332 5333 /* 5334 * PATHCONF request 5335 */ 5336 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, 5337 struct nfs4_pathconf_res *res) 5338 { 5339 struct xdr_stream xdr; 5340 struct compound_hdr hdr; 5341 int status; 5342 5343 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5344 status = decode_compound_hdr(&xdr, &hdr); 5345 if (!status) 5346 status = decode_sequence(&xdr, &res->seq_res, req); 5347 if (!status) 5348 status = decode_putfh(&xdr); 5349 if (!status) 5350 status = decode_pathconf(&xdr, res->pathconf); 5351 return status; 5352 } 5353 5354 /* 5355 * STATFS request 5356 */ 5357 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, 5358 struct nfs4_statfs_res *res) 5359 { 5360 struct xdr_stream xdr; 5361 struct compound_hdr hdr; 5362 int status; 5363 5364 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5365 status = decode_compound_hdr(&xdr, &hdr); 5366 if (!status) 5367 status = decode_sequence(&xdr, &res->seq_res, req); 5368 if (!status) 5369 status = decode_putfh(&xdr); 5370 if (!status) 5371 status = decode_statfs(&xdr, res->fsstat); 5372 return status; 5373 } 5374 5375 /* 5376 * GETATTR_BITMAP request 5377 */ 5378 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res) 5379 { 5380 struct xdr_stream xdr; 5381 struct compound_hdr hdr; 5382 int status; 5383 5384 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5385 status = decode_compound_hdr(&xdr, &hdr); 5386 if (status) 5387 goto out; 5388 status = decode_sequence(&xdr, &res->seq_res, req); 5389 if (status) 5390 goto out; 5391 if ((status = decode_putfh(&xdr)) != 0) 5392 goto out; 5393 status = decode_server_caps(&xdr, res); 5394 out: 5395 return status; 5396 } 5397 5398 /* 5399 * Decode RENEW response 5400 */ 5401 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy) 5402 { 5403 struct xdr_stream xdr; 5404 struct compound_hdr hdr; 5405 int status; 5406 5407 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5408 status = decode_compound_hdr(&xdr, &hdr); 5409 if (!status) 5410 status = decode_renew(&xdr); 5411 return status; 5412 } 5413 5414 /* 5415 * a SETCLIENTID request 5416 */ 5417 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p, 5418 struct nfs_client *clp) 5419 { 5420 struct xdr_stream xdr; 5421 struct compound_hdr hdr; 5422 int status; 5423 5424 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5425 status = decode_compound_hdr(&xdr, &hdr); 5426 if (!status) 5427 status = decode_setclientid(&xdr, clp); 5428 return status; 5429 } 5430 5431 /* 5432 * a SETCLIENTID_CONFIRM request 5433 */ 5434 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo) 5435 { 5436 struct xdr_stream xdr; 5437 struct compound_hdr hdr; 5438 int status; 5439 5440 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5441 status = decode_compound_hdr(&xdr, &hdr); 5442 if (!status) 5443 status = decode_setclientid_confirm(&xdr); 5444 if (!status) 5445 status = decode_putrootfh(&xdr); 5446 if (!status) 5447 status = decode_fsinfo(&xdr, fsinfo); 5448 return status; 5449 } 5450 5451 /* 5452 * DELEGRETURN request 5453 */ 5454 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res) 5455 { 5456 struct xdr_stream xdr; 5457 struct compound_hdr hdr; 5458 int status; 5459 5460 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5461 status = decode_compound_hdr(&xdr, &hdr); 5462 if (status) 5463 goto out; 5464 status = decode_sequence(&xdr, &res->seq_res, rqstp); 5465 if (status) 5466 goto out; 5467 status = decode_putfh(&xdr); 5468 if (status != 0) 5469 goto out; 5470 status = decode_delegreturn(&xdr); 5471 decode_getfattr(&xdr, res->fattr, res->server, 5472 !RPC_IS_ASYNC(rqstp->rq_task)); 5473 out: 5474 return status; 5475 } 5476 5477 /* 5478 * FS_LOCATIONS request 5479 */ 5480 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, 5481 struct nfs4_fs_locations_res *res) 5482 { 5483 struct xdr_stream xdr; 5484 struct compound_hdr hdr; 5485 int status; 5486 5487 xdr_init_decode(&xdr, &req->rq_rcv_buf, p); 5488 status = decode_compound_hdr(&xdr, &hdr); 5489 if (status) 5490 goto out; 5491 status = decode_sequence(&xdr, &res->seq_res, req); 5492 if (status) 5493 goto out; 5494 if ((status = decode_putfh(&xdr)) != 0) 5495 goto out; 5496 if ((status = decode_lookup(&xdr)) != 0) 5497 goto out; 5498 xdr_enter_page(&xdr, PAGE_SIZE); 5499 status = decode_getfattr(&xdr, &res->fs_locations->fattr, 5500 res->fs_locations->server, 5501 !RPC_IS_ASYNC(req->rq_task)); 5502 out: 5503 return status; 5504 } 5505 5506 #if defined(CONFIG_NFS_V4_1) 5507 /* 5508 * EXCHANGE_ID request 5509 */ 5510 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p, 5511 void *res) 5512 { 5513 struct xdr_stream xdr; 5514 struct compound_hdr hdr; 5515 int status; 5516 5517 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5518 status = decode_compound_hdr(&xdr, &hdr); 5519 if (!status) 5520 status = decode_exchange_id(&xdr, res); 5521 return status; 5522 } 5523 5524 /* 5525 * a CREATE_SESSION request 5526 */ 5527 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p, 5528 struct nfs41_create_session_res *res) 5529 { 5530 struct xdr_stream xdr; 5531 struct compound_hdr hdr; 5532 int status; 5533 5534 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5535 status = decode_compound_hdr(&xdr, &hdr); 5536 if (!status) 5537 status = decode_create_session(&xdr, res); 5538 return status; 5539 } 5540 5541 /* 5542 * a DESTROY_SESSION request 5543 */ 5544 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p, 5545 void *dummy) 5546 { 5547 struct xdr_stream xdr; 5548 struct compound_hdr hdr; 5549 int status; 5550 5551 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5552 status = decode_compound_hdr(&xdr, &hdr); 5553 if (!status) 5554 status = decode_destroy_session(&xdr, dummy); 5555 return status; 5556 } 5557 5558 /* 5559 * a SEQUENCE request 5560 */ 5561 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p, 5562 struct nfs4_sequence_res *res) 5563 { 5564 struct xdr_stream xdr; 5565 struct compound_hdr hdr; 5566 int status; 5567 5568 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5569 status = decode_compound_hdr(&xdr, &hdr); 5570 if (!status) 5571 status = decode_sequence(&xdr, res, rqstp); 5572 return status; 5573 } 5574 5575 /* 5576 * a GET_LEASE_TIME request 5577 */ 5578 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p, 5579 struct nfs4_get_lease_time_res *res) 5580 { 5581 struct xdr_stream xdr; 5582 struct compound_hdr hdr; 5583 int status; 5584 5585 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); 5586 status = decode_compound_hdr(&xdr, &hdr); 5587 if (!status) 5588 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp); 5589 if (!status) 5590 status = decode_putrootfh(&xdr); 5591 if (!status) 5592 status = decode_fsinfo(&xdr, res->lr_fsinfo); 5593 return status; 5594 } 5595 #endif /* CONFIG_NFS_V4_1 */ 5596 5597 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus) 5598 { 5599 uint32_t bitmap[2] = {0}; 5600 uint32_t len; 5601 5602 if (!*p++) { 5603 if (!*p) 5604 return ERR_PTR(-EAGAIN); 5605 entry->eof = 1; 5606 return ERR_PTR(-EBADCOOKIE); 5607 } 5608 5609 entry->prev_cookie = entry->cookie; 5610 p = xdr_decode_hyper(p, &entry->cookie); 5611 entry->len = ntohl(*p++); 5612 entry->name = (const char *) p; 5613 p += XDR_QUADLEN(entry->len); 5614 5615 /* 5616 * In case the server doesn't return an inode number, 5617 * we fake one here. (We don't use inode number 0, 5618 * since glibc seems to choke on it...) 5619 */ 5620 entry->ino = 1; 5621 5622 len = ntohl(*p++); /* bitmap length */ 5623 if (len-- > 0) { 5624 bitmap[0] = ntohl(*p++); 5625 if (len-- > 0) { 5626 bitmap[1] = ntohl(*p++); 5627 p += len; 5628 } 5629 } 5630 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */ 5631 if (len > 0) { 5632 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) { 5633 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR; 5634 /* Ignore the return value of rdattr_error for now */ 5635 p++; 5636 len--; 5637 } 5638 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID) 5639 xdr_decode_hyper(p, &entry->ino); 5640 else if (bitmap[0] == FATTR4_WORD0_FILEID) 5641 xdr_decode_hyper(p, &entry->ino); 5642 p += len; 5643 } 5644 5645 entry->eof = !p[0] && p[1]; 5646 return p; 5647 } 5648 5649 /* 5650 * We need to translate between nfs status return values and 5651 * the local errno values which may not be the same. 5652 */ 5653 static struct { 5654 int stat; 5655 int errno; 5656 } nfs_errtbl[] = { 5657 { NFS4_OK, 0 }, 5658 { NFS4ERR_PERM, -EPERM }, 5659 { NFS4ERR_NOENT, -ENOENT }, 5660 { NFS4ERR_IO, -errno_NFSERR_IO}, 5661 { NFS4ERR_NXIO, -ENXIO }, 5662 { NFS4ERR_ACCESS, -EACCES }, 5663 { NFS4ERR_EXIST, -EEXIST }, 5664 { NFS4ERR_XDEV, -EXDEV }, 5665 { NFS4ERR_NOTDIR, -ENOTDIR }, 5666 { NFS4ERR_ISDIR, -EISDIR }, 5667 { NFS4ERR_INVAL, -EINVAL }, 5668 { NFS4ERR_FBIG, -EFBIG }, 5669 { NFS4ERR_NOSPC, -ENOSPC }, 5670 { NFS4ERR_ROFS, -EROFS }, 5671 { NFS4ERR_MLINK, -EMLINK }, 5672 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG }, 5673 { NFS4ERR_NOTEMPTY, -ENOTEMPTY }, 5674 { NFS4ERR_DQUOT, -EDQUOT }, 5675 { NFS4ERR_STALE, -ESTALE }, 5676 { NFS4ERR_BADHANDLE, -EBADHANDLE }, 5677 { NFS4ERR_BADOWNER, -EINVAL }, 5678 { NFS4ERR_BADNAME, -EINVAL }, 5679 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, 5680 { NFS4ERR_NOTSUPP, -ENOTSUPP }, 5681 { NFS4ERR_TOOSMALL, -ETOOSMALL }, 5682 { NFS4ERR_SERVERFAULT, -ESERVERFAULT }, 5683 { NFS4ERR_BADTYPE, -EBADTYPE }, 5684 { NFS4ERR_LOCKED, -EAGAIN }, 5685 { NFS4ERR_RESOURCE, -EREMOTEIO }, 5686 { NFS4ERR_SYMLINK, -ELOOP }, 5687 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, 5688 { NFS4ERR_DEADLOCK, -EDEADLK }, 5689 { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs 5690 * to be handled by a 5691 * middle-layer. 5692 */ 5693 { -1, -EIO } 5694 }; 5695 5696 /* 5697 * Convert an NFS error code to a local one. 5698 * This one is used jointly by NFSv2 and NFSv3. 5699 */ 5700 static int 5701 nfs4_stat_to_errno(int stat) 5702 { 5703 int i; 5704 for (i = 0; nfs_errtbl[i].stat != -1; i++) { 5705 if (nfs_errtbl[i].stat == stat) 5706 return nfs_errtbl[i].errno; 5707 } 5708 if (stat <= 10000 || stat > 10100) { 5709 /* The server is looney tunes. */ 5710 return -ESERVERFAULT; 5711 } 5712 /* If we cannot translate the error, the recovery routines should 5713 * handle it. 5714 * Note: remaining NFSv4 error codes have values > 10000, so should 5715 * not conflict with native Linux error codes. 5716 */ 5717 return -stat; 5718 } 5719 5720 #define PROC(proc, argtype, restype) \ 5721 [NFSPROC4_CLNT_##proc] = { \ 5722 .p_proc = NFSPROC4_COMPOUND, \ 5723 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ 5724 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ 5725 .p_arglen = NFS4_##argtype##_sz, \ 5726 .p_replen = NFS4_##restype##_sz, \ 5727 .p_statidx = NFSPROC4_CLNT_##proc, \ 5728 .p_name = #proc, \ 5729 } 5730 5731 struct rpc_procinfo nfs4_procedures[] = { 5732 PROC(READ, enc_read, dec_read), 5733 PROC(WRITE, enc_write, dec_write), 5734 PROC(COMMIT, enc_commit, dec_commit), 5735 PROC(OPEN, enc_open, dec_open), 5736 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), 5737 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), 5738 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), 5739 PROC(CLOSE, enc_close, dec_close), 5740 PROC(SETATTR, enc_setattr, dec_setattr), 5741 PROC(FSINFO, enc_fsinfo, dec_fsinfo), 5742 PROC(RENEW, enc_renew, dec_renew), 5743 PROC(SETCLIENTID, enc_setclientid, dec_setclientid), 5744 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), 5745 PROC(LOCK, enc_lock, dec_lock), 5746 PROC(LOCKT, enc_lockt, dec_lockt), 5747 PROC(LOCKU, enc_locku, dec_locku), 5748 PROC(ACCESS, enc_access, dec_access), 5749 PROC(GETATTR, enc_getattr, dec_getattr), 5750 PROC(LOOKUP, enc_lookup, dec_lookup), 5751 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), 5752 PROC(REMOVE, enc_remove, dec_remove), 5753 PROC(RENAME, enc_rename, dec_rename), 5754 PROC(LINK, enc_link, dec_link), 5755 PROC(SYMLINK, enc_symlink, dec_symlink), 5756 PROC(CREATE, enc_create, dec_create), 5757 PROC(PATHCONF, enc_pathconf, dec_pathconf), 5758 PROC(STATFS, enc_statfs, dec_statfs), 5759 PROC(READLINK, enc_readlink, dec_readlink), 5760 PROC(READDIR, enc_readdir, dec_readdir), 5761 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), 5762 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), 5763 PROC(GETACL, enc_getacl, dec_getacl), 5764 PROC(SETACL, enc_setacl, dec_setacl), 5765 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), 5766 #if defined(CONFIG_NFS_V4_1) 5767 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), 5768 PROC(CREATE_SESSION, enc_create_session, dec_create_session), 5769 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), 5770 PROC(SEQUENCE, enc_sequence, dec_sequence), 5771 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), 5772 #endif /* CONFIG_NFS_V4_1 */ 5773 }; 5774 5775 struct rpc_version nfs_version4 = { 5776 .number = 4, 5777 .nrprocs = ARRAY_SIZE(nfs4_procedures), 5778 .procs = nfs4_procedures 5779 }; 5780 5781 /* 5782 * Local variables: 5783 * c-basic-offset: 8 5784 * End: 5785 */ 5786