1 /* 2 * Server-side XDR for NFSv4 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <linux/file.h> 37 #include <linux/slab.h> 38 #include <linux/namei.h> 39 #include <linux/statfs.h> 40 #include <linux/utsname.h> 41 #include <linux/pagemap.h> 42 #include <linux/sunrpc/svcauth_gss.h> 43 44 #include "idmap.h" 45 #include "acl.h" 46 #include "xdr4.h" 47 #include "vfs.h" 48 #include "state.h" 49 #include "cache.h" 50 #include "netns.h" 51 #include "pnfs.h" 52 53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 54 #include <linux/security.h> 55 #endif 56 57 58 #define NFSDDBG_FACILITY NFSDDBG_XDR 59 60 /* 61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 62 * directory in order to indicate to the client that a filesystem boundary is present 63 * We use a fixed fsid for a referral 64 */ 65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 67 68 static __be32 69 check_filename(char *str, int len) 70 { 71 int i; 72 73 if (len == 0) 74 return nfserr_inval; 75 if (isdotent(str, len)) 76 return nfserr_badname; 77 for (i = 0; i < len; i++) 78 if (str[i] == '/') 79 return nfserr_badname; 80 return 0; 81 } 82 83 #define DECODE_HEAD \ 84 __be32 *p; \ 85 __be32 status 86 #define DECODE_TAIL \ 87 status = 0; \ 88 out: \ 89 return status; \ 90 xdr_error: \ 91 dprintk("NFSD: xdr error (%s:%d)\n", \ 92 __FILE__, __LINE__); \ 93 status = nfserr_bad_xdr; \ 94 goto out 95 96 #define READMEM(x,nbytes) do { \ 97 x = (char *)p; \ 98 p += XDR_QUADLEN(nbytes); \ 99 } while (0) 100 #define SAVEMEM(x,nbytes) do { \ 101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 102 savemem(argp, p, nbytes) : \ 103 (char *)p)) { \ 104 dprintk("NFSD: xdr error (%s:%d)\n", \ 105 __FILE__, __LINE__); \ 106 goto xdr_error; \ 107 } \ 108 p += XDR_QUADLEN(nbytes); \ 109 } while (0) 110 #define COPYMEM(x,nbytes) do { \ 111 memcpy((x), p, nbytes); \ 112 p += XDR_QUADLEN(nbytes); \ 113 } while (0) 114 115 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 116 #define READ_BUF(nbytes) do { \ 117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 118 p = argp->p; \ 119 argp->p += XDR_QUADLEN(nbytes); \ 120 } else if (!(p = read_buf(argp, nbytes))) { \ 121 dprintk("NFSD: xdr error (%s:%d)\n", \ 122 __FILE__, __LINE__); \ 123 goto xdr_error; \ 124 } \ 125 } while (0) 126 127 static void next_decode_page(struct nfsd4_compoundargs *argp) 128 { 129 argp->p = page_address(argp->pagelist[0]); 130 argp->pagelist++; 131 if (argp->pagelen < PAGE_SIZE) { 132 argp->end = argp->p + (argp->pagelen>>2); 133 argp->pagelen = 0; 134 } else { 135 argp->end = argp->p + (PAGE_SIZE>>2); 136 argp->pagelen -= PAGE_SIZE; 137 } 138 } 139 140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 141 { 142 /* We want more bytes than seem to be available. 143 * Maybe we need a new page, maybe we have just run out 144 */ 145 unsigned int avail = (char *)argp->end - (char *)argp->p; 146 __be32 *p; 147 if (avail + argp->pagelen < nbytes) 148 return NULL; 149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 150 return NULL; 151 /* ok, we can do it with the current plus the next page */ 152 if (nbytes <= sizeof(argp->tmp)) 153 p = argp->tmp; 154 else { 155 kfree(argp->tmpp); 156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 157 if (!p) 158 return NULL; 159 160 } 161 /* 162 * The following memcpy is safe because read_buf is always 163 * called with nbytes > avail, and the two cases above both 164 * guarantee p points to at least nbytes bytes. 165 */ 166 memcpy(p, argp->p, avail); 167 next_decode_page(argp); 168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 169 argp->p += XDR_QUADLEN(nbytes - avail); 170 return p; 171 } 172 173 static int zero_clientid(clientid_t *clid) 174 { 175 return (clid->cl_boot == 0) && (clid->cl_id == 0); 176 } 177 178 /** 179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing 180 * @argp: NFSv4 compound argument structure 181 * @p: pointer to be freed (with kfree()) 182 * 183 * Marks @p to be freed when processing the compound operation 184 * described in @argp finishes. 185 */ 186 static void * 187 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) 188 { 189 struct svcxdr_tmpbuf *tb; 190 191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); 192 if (!tb) 193 return NULL; 194 tb->next = argp->to_free; 195 argp->to_free = tb; 196 return tb->buf; 197 } 198 199 /* 200 * For xdr strings that need to be passed to other kernel api's 201 * as null-terminated strings. 202 * 203 * Note null-terminating in place usually isn't safe since the 204 * buffer might end on a page boundary. 205 */ 206 static char * 207 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) 208 { 209 char *p = svcxdr_tmpalloc(argp, len + 1); 210 211 if (!p) 212 return NULL; 213 memcpy(p, buf, len); 214 p[len] = '\0'; 215 return p; 216 } 217 218 /** 219 * savemem - duplicate a chunk of memory for later processing 220 * @argp: NFSv4 compound argument structure to be freed with 221 * @p: pointer to be duplicated 222 * @nbytes: length to be duplicated 223 * 224 * Returns a pointer to a copy of @nbytes bytes of memory at @p 225 * that are preserved until processing of the NFSv4 compound 226 * operation described by @argp finishes. 227 */ 228 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 229 { 230 void *ret; 231 232 ret = svcxdr_tmpalloc(argp, nbytes); 233 if (!ret) 234 return NULL; 235 memcpy(ret, p, nbytes); 236 return ret; 237 } 238 239 /* 240 * We require the high 32 bits of 'seconds' to be 0, and 241 * we ignore all 32 bits of 'nseconds'. 242 */ 243 static __be32 244 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv) 245 { 246 DECODE_HEAD; 247 u64 sec; 248 249 READ_BUF(12); 250 p = xdr_decode_hyper(p, &sec); 251 tv->tv_sec = sec; 252 tv->tv_nsec = be32_to_cpup(p++); 253 if (tv->tv_nsec >= (u32)1000000000) 254 return nfserr_inval; 255 256 DECODE_TAIL; 257 } 258 259 static __be32 260 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 261 { 262 u32 bmlen; 263 DECODE_HEAD; 264 265 bmval[0] = 0; 266 bmval[1] = 0; 267 bmval[2] = 0; 268 269 READ_BUF(4); 270 bmlen = be32_to_cpup(p++); 271 if (bmlen > 1000) 272 goto xdr_error; 273 274 READ_BUF(bmlen << 2); 275 if (bmlen > 0) 276 bmval[0] = be32_to_cpup(p++); 277 if (bmlen > 1) 278 bmval[1] = be32_to_cpup(p++); 279 if (bmlen > 2) 280 bmval[2] = be32_to_cpup(p++); 281 282 DECODE_TAIL; 283 } 284 285 static __be32 286 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 287 struct iattr *iattr, struct nfs4_acl **acl, 288 struct xdr_netobj *label) 289 { 290 int expected_len, len = 0; 291 u32 dummy32; 292 char *buf; 293 294 DECODE_HEAD; 295 iattr->ia_valid = 0; 296 if ((status = nfsd4_decode_bitmap(argp, bmval))) 297 return status; 298 299 READ_BUF(4); 300 expected_len = be32_to_cpup(p++); 301 302 if (bmval[0] & FATTR4_WORD0_SIZE) { 303 READ_BUF(8); 304 len += 8; 305 p = xdr_decode_hyper(p, &iattr->ia_size); 306 iattr->ia_valid |= ATTR_SIZE; 307 } 308 if (bmval[0] & FATTR4_WORD0_ACL) { 309 u32 nace; 310 struct nfs4_ace *ace; 311 312 READ_BUF(4); len += 4; 313 nace = be32_to_cpup(p++); 314 315 if (nace > NFS4_ACL_MAX) 316 return nfserr_fbig; 317 318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); 319 if (*acl == NULL) 320 return nfserr_jukebox; 321 322 (*acl)->naces = nace; 323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 324 READ_BUF(16); len += 16; 325 ace->type = be32_to_cpup(p++); 326 ace->flag = be32_to_cpup(p++); 327 ace->access_mask = be32_to_cpup(p++); 328 dummy32 = be32_to_cpup(p++); 329 READ_BUF(dummy32); 330 len += XDR_QUADLEN(dummy32) << 2; 331 READMEM(buf, dummy32); 332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 333 status = nfs_ok; 334 if (ace->whotype != NFS4_ACL_WHO_NAMED) 335 ; 336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 337 status = nfsd_map_name_to_gid(argp->rqstp, 338 buf, dummy32, &ace->who_gid); 339 else 340 status = nfsd_map_name_to_uid(argp->rqstp, 341 buf, dummy32, &ace->who_uid); 342 if (status) 343 return status; 344 } 345 } else 346 *acl = NULL; 347 if (bmval[1] & FATTR4_WORD1_MODE) { 348 READ_BUF(4); 349 len += 4; 350 iattr->ia_mode = be32_to_cpup(p++); 351 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 352 iattr->ia_valid |= ATTR_MODE; 353 } 354 if (bmval[1] & FATTR4_WORD1_OWNER) { 355 READ_BUF(4); 356 len += 4; 357 dummy32 = be32_to_cpup(p++); 358 READ_BUF(dummy32); 359 len += (XDR_QUADLEN(dummy32) << 2); 360 READMEM(buf, dummy32); 361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 362 return status; 363 iattr->ia_valid |= ATTR_UID; 364 } 365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 366 READ_BUF(4); 367 len += 4; 368 dummy32 = be32_to_cpup(p++); 369 READ_BUF(dummy32); 370 len += (XDR_QUADLEN(dummy32) << 2); 371 READMEM(buf, dummy32); 372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 373 return status; 374 iattr->ia_valid |= ATTR_GID; 375 } 376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 377 READ_BUF(4); 378 len += 4; 379 dummy32 = be32_to_cpup(p++); 380 switch (dummy32) { 381 case NFS4_SET_TO_CLIENT_TIME: 382 len += 12; 383 status = nfsd4_decode_time(argp, &iattr->ia_atime); 384 if (status) 385 return status; 386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 387 break; 388 case NFS4_SET_TO_SERVER_TIME: 389 iattr->ia_valid |= ATTR_ATIME; 390 break; 391 default: 392 goto xdr_error; 393 } 394 } 395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 396 READ_BUF(4); 397 len += 4; 398 dummy32 = be32_to_cpup(p++); 399 switch (dummy32) { 400 case NFS4_SET_TO_CLIENT_TIME: 401 len += 12; 402 status = nfsd4_decode_time(argp, &iattr->ia_mtime); 403 if (status) 404 return status; 405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 406 break; 407 case NFS4_SET_TO_SERVER_TIME: 408 iattr->ia_valid |= ATTR_MTIME; 409 break; 410 default: 411 goto xdr_error; 412 } 413 } 414 415 label->len = 0; 416 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { 418 READ_BUF(4); 419 len += 4; 420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ 421 READ_BUF(4); 422 len += 4; 423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ 424 READ_BUF(4); 425 len += 4; 426 dummy32 = be32_to_cpup(p++); 427 READ_BUF(dummy32); 428 if (dummy32 > NFS4_MAXLABELLEN) 429 return nfserr_badlabel; 430 len += (XDR_QUADLEN(dummy32) << 2); 431 READMEM(buf, dummy32); 432 label->len = dummy32; 433 label->data = svcxdr_dupstr(argp, buf, dummy32); 434 if (!label->data) 435 return nfserr_jukebox; 436 } 437 #endif 438 439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 442 READ_BUF(expected_len - len); 443 else if (len != expected_len) 444 goto xdr_error; 445 446 DECODE_TAIL; 447 } 448 449 static __be32 450 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 451 { 452 DECODE_HEAD; 453 454 READ_BUF(sizeof(stateid_t)); 455 sid->si_generation = be32_to_cpup(p++); 456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 457 458 DECODE_TAIL; 459 } 460 461 static __be32 462 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 463 { 464 DECODE_HEAD; 465 466 READ_BUF(4); 467 access->ac_req_access = be32_to_cpup(p++); 468 469 DECODE_TAIL; 470 } 471 472 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 473 { 474 DECODE_HEAD; 475 u32 dummy, uid, gid; 476 char *machine_name; 477 int i; 478 int nr_secflavs; 479 480 /* callback_sec_params4 */ 481 READ_BUF(4); 482 nr_secflavs = be32_to_cpup(p++); 483 if (nr_secflavs) 484 cbs->flavor = (u32)(-1); 485 else 486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */ 487 cbs->flavor = 0; 488 for (i = 0; i < nr_secflavs; ++i) { 489 READ_BUF(4); 490 dummy = be32_to_cpup(p++); 491 switch (dummy) { 492 case RPC_AUTH_NULL: 493 /* Nothing to read */ 494 if (cbs->flavor == (u32)(-1)) 495 cbs->flavor = RPC_AUTH_NULL; 496 break; 497 case RPC_AUTH_UNIX: 498 READ_BUF(8); 499 /* stamp */ 500 dummy = be32_to_cpup(p++); 501 502 /* machine name */ 503 dummy = be32_to_cpup(p++); 504 READ_BUF(dummy); 505 SAVEMEM(machine_name, dummy); 506 507 /* uid, gid */ 508 READ_BUF(8); 509 uid = be32_to_cpup(p++); 510 gid = be32_to_cpup(p++); 511 512 /* more gids */ 513 READ_BUF(4); 514 dummy = be32_to_cpup(p++); 515 READ_BUF(dummy * 4); 516 if (cbs->flavor == (u32)(-1)) { 517 kuid_t kuid = make_kuid(&init_user_ns, uid); 518 kgid_t kgid = make_kgid(&init_user_ns, gid); 519 if (uid_valid(kuid) && gid_valid(kgid)) { 520 cbs->uid = kuid; 521 cbs->gid = kgid; 522 cbs->flavor = RPC_AUTH_UNIX; 523 } else { 524 dprintk("RPC_AUTH_UNIX with invalid" 525 "uid or gid ignoring!\n"); 526 } 527 } 528 break; 529 case RPC_AUTH_GSS: 530 dprintk("RPC_AUTH_GSS callback secflavor " 531 "not supported!\n"); 532 READ_BUF(8); 533 /* gcbp_service */ 534 dummy = be32_to_cpup(p++); 535 /* gcbp_handle_from_server */ 536 dummy = be32_to_cpup(p++); 537 READ_BUF(dummy); 538 p += XDR_QUADLEN(dummy); 539 /* gcbp_handle_from_client */ 540 READ_BUF(4); 541 dummy = be32_to_cpup(p++); 542 READ_BUF(dummy); 543 break; 544 default: 545 dprintk("Illegal callback secflavor\n"); 546 return nfserr_inval; 547 } 548 } 549 DECODE_TAIL; 550 } 551 552 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 553 { 554 DECODE_HEAD; 555 556 READ_BUF(4); 557 bc->bc_cb_program = be32_to_cpup(p++); 558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 559 560 DECODE_TAIL; 561 } 562 563 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 564 { 565 DECODE_HEAD; 566 567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 569 bcts->dir = be32_to_cpup(p++); 570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 571 * could help us figure out we should be using it. */ 572 DECODE_TAIL; 573 } 574 575 static __be32 576 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 577 { 578 DECODE_HEAD; 579 580 READ_BUF(4); 581 close->cl_seqid = be32_to_cpup(p++); 582 return nfsd4_decode_stateid(argp, &close->cl_stateid); 583 584 DECODE_TAIL; 585 } 586 587 588 static __be32 589 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 590 { 591 DECODE_HEAD; 592 593 READ_BUF(12); 594 p = xdr_decode_hyper(p, &commit->co_offset); 595 commit->co_count = be32_to_cpup(p++); 596 597 DECODE_TAIL; 598 } 599 600 static __be32 601 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 602 { 603 DECODE_HEAD; 604 605 READ_BUF(4); 606 create->cr_type = be32_to_cpup(p++); 607 switch (create->cr_type) { 608 case NF4LNK: 609 READ_BUF(4); 610 create->cr_datalen = be32_to_cpup(p++); 611 READ_BUF(create->cr_datalen); 612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); 613 if (!create->cr_data) 614 return nfserr_jukebox; 615 break; 616 case NF4BLK: 617 case NF4CHR: 618 READ_BUF(8); 619 create->cr_specdata1 = be32_to_cpup(p++); 620 create->cr_specdata2 = be32_to_cpup(p++); 621 break; 622 case NF4SOCK: 623 case NF4FIFO: 624 case NF4DIR: 625 default: 626 break; 627 } 628 629 READ_BUF(4); 630 create->cr_namelen = be32_to_cpup(p++); 631 READ_BUF(create->cr_namelen); 632 SAVEMEM(create->cr_name, create->cr_namelen); 633 if ((status = check_filename(create->cr_name, create->cr_namelen))) 634 return status; 635 636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 637 &create->cr_acl, &create->cr_label); 638 if (status) 639 goto out; 640 641 DECODE_TAIL; 642 } 643 644 static inline __be32 645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 646 { 647 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 648 } 649 650 static inline __be32 651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 652 { 653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 654 } 655 656 static __be32 657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 658 { 659 DECODE_HEAD; 660 661 READ_BUF(4); 662 link->li_namelen = be32_to_cpup(p++); 663 READ_BUF(link->li_namelen); 664 SAVEMEM(link->li_name, link->li_namelen); 665 if ((status = check_filename(link->li_name, link->li_namelen))) 666 return status; 667 668 DECODE_TAIL; 669 } 670 671 static __be32 672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 673 { 674 DECODE_HEAD; 675 676 /* 677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 678 */ 679 READ_BUF(28); 680 lock->lk_type = be32_to_cpup(p++); 681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 682 goto xdr_error; 683 lock->lk_reclaim = be32_to_cpup(p++); 684 p = xdr_decode_hyper(p, &lock->lk_offset); 685 p = xdr_decode_hyper(p, &lock->lk_length); 686 lock->lk_is_new = be32_to_cpup(p++); 687 688 if (lock->lk_is_new) { 689 READ_BUF(4); 690 lock->lk_new_open_seqid = be32_to_cpup(p++); 691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 692 if (status) 693 return status; 694 READ_BUF(8 + sizeof(clientid_t)); 695 lock->lk_new_lock_seqid = be32_to_cpup(p++); 696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 697 lock->lk_new_owner.len = be32_to_cpup(p++); 698 READ_BUF(lock->lk_new_owner.len); 699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 700 } else { 701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 702 if (status) 703 return status; 704 READ_BUF(4); 705 lock->lk_old_lock_seqid = be32_to_cpup(p++); 706 } 707 708 DECODE_TAIL; 709 } 710 711 static __be32 712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 713 { 714 DECODE_HEAD; 715 716 READ_BUF(32); 717 lockt->lt_type = be32_to_cpup(p++); 718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 719 goto xdr_error; 720 p = xdr_decode_hyper(p, &lockt->lt_offset); 721 p = xdr_decode_hyper(p, &lockt->lt_length); 722 COPYMEM(&lockt->lt_clientid, 8); 723 lockt->lt_owner.len = be32_to_cpup(p++); 724 READ_BUF(lockt->lt_owner.len); 725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 726 727 DECODE_TAIL; 728 } 729 730 static __be32 731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 732 { 733 DECODE_HEAD; 734 735 READ_BUF(8); 736 locku->lu_type = be32_to_cpup(p++); 737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 738 goto xdr_error; 739 locku->lu_seqid = be32_to_cpup(p++); 740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 741 if (status) 742 return status; 743 READ_BUF(16); 744 p = xdr_decode_hyper(p, &locku->lu_offset); 745 p = xdr_decode_hyper(p, &locku->lu_length); 746 747 DECODE_TAIL; 748 } 749 750 static __be32 751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 752 { 753 DECODE_HEAD; 754 755 READ_BUF(4); 756 lookup->lo_len = be32_to_cpup(p++); 757 READ_BUF(lookup->lo_len); 758 SAVEMEM(lookup->lo_name, lookup->lo_len); 759 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 760 return status; 761 762 DECODE_TAIL; 763 } 764 765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 766 { 767 __be32 *p; 768 u32 w; 769 770 READ_BUF(4); 771 w = be32_to_cpup(p++); 772 *share_access = w & NFS4_SHARE_ACCESS_MASK; 773 *deleg_want = w & NFS4_SHARE_WANT_MASK; 774 if (deleg_when) 775 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 776 777 switch (w & NFS4_SHARE_ACCESS_MASK) { 778 case NFS4_SHARE_ACCESS_READ: 779 case NFS4_SHARE_ACCESS_WRITE: 780 case NFS4_SHARE_ACCESS_BOTH: 781 break; 782 default: 783 return nfserr_bad_xdr; 784 } 785 w &= ~NFS4_SHARE_ACCESS_MASK; 786 if (!w) 787 return nfs_ok; 788 if (!argp->minorversion) 789 return nfserr_bad_xdr; 790 switch (w & NFS4_SHARE_WANT_MASK) { 791 case NFS4_SHARE_WANT_NO_PREFERENCE: 792 case NFS4_SHARE_WANT_READ_DELEG: 793 case NFS4_SHARE_WANT_WRITE_DELEG: 794 case NFS4_SHARE_WANT_ANY_DELEG: 795 case NFS4_SHARE_WANT_NO_DELEG: 796 case NFS4_SHARE_WANT_CANCEL: 797 break; 798 default: 799 return nfserr_bad_xdr; 800 } 801 w &= ~NFS4_SHARE_WANT_MASK; 802 if (!w) 803 return nfs_ok; 804 805 if (!deleg_when) /* open_downgrade */ 806 return nfserr_inval; 807 switch (w) { 808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 812 return nfs_ok; 813 } 814 xdr_error: 815 return nfserr_bad_xdr; 816 } 817 818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 819 { 820 __be32 *p; 821 822 READ_BUF(4); 823 *x = be32_to_cpup(p++); 824 /* Note: unlinke access bits, deny bits may be zero. */ 825 if (*x & ~NFS4_SHARE_DENY_BOTH) 826 return nfserr_bad_xdr; 827 return nfs_ok; 828 xdr_error: 829 return nfserr_bad_xdr; 830 } 831 832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 833 { 834 __be32 *p; 835 836 READ_BUF(4); 837 o->len = be32_to_cpup(p++); 838 839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 840 return nfserr_bad_xdr; 841 842 READ_BUF(o->len); 843 SAVEMEM(o->data, o->len); 844 return nfs_ok; 845 xdr_error: 846 return nfserr_bad_xdr; 847 } 848 849 static __be32 850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 851 { 852 DECODE_HEAD; 853 u32 dummy; 854 855 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 856 open->op_iattr.ia_valid = 0; 857 open->op_openowner = NULL; 858 859 open->op_xdr_error = 0; 860 /* seqid, share_access, share_deny, clientid, ownerlen */ 861 READ_BUF(4); 862 open->op_seqid = be32_to_cpup(p++); 863 /* decode, yet ignore deleg_when until supported */ 864 status = nfsd4_decode_share_access(argp, &open->op_share_access, 865 &open->op_deleg_want, &dummy); 866 if (status) 867 goto xdr_error; 868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 869 if (status) 870 goto xdr_error; 871 READ_BUF(sizeof(clientid_t)); 872 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 873 status = nfsd4_decode_opaque(argp, &open->op_owner); 874 if (status) 875 goto xdr_error; 876 READ_BUF(4); 877 open->op_create = be32_to_cpup(p++); 878 switch (open->op_create) { 879 case NFS4_OPEN_NOCREATE: 880 break; 881 case NFS4_OPEN_CREATE: 882 READ_BUF(4); 883 open->op_createmode = be32_to_cpup(p++); 884 switch (open->op_createmode) { 885 case NFS4_CREATE_UNCHECKED: 886 case NFS4_CREATE_GUARDED: 887 status = nfsd4_decode_fattr(argp, open->op_bmval, 888 &open->op_iattr, &open->op_acl, &open->op_label); 889 if (status) 890 goto out; 891 break; 892 case NFS4_CREATE_EXCLUSIVE: 893 READ_BUF(NFS4_VERIFIER_SIZE); 894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 895 break; 896 case NFS4_CREATE_EXCLUSIVE4_1: 897 if (argp->minorversion < 1) 898 goto xdr_error; 899 READ_BUF(NFS4_VERIFIER_SIZE); 900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 901 status = nfsd4_decode_fattr(argp, open->op_bmval, 902 &open->op_iattr, &open->op_acl, &open->op_label); 903 if (status) 904 goto out; 905 break; 906 default: 907 goto xdr_error; 908 } 909 break; 910 default: 911 goto xdr_error; 912 } 913 914 /* open_claim */ 915 READ_BUF(4); 916 open->op_claim_type = be32_to_cpup(p++); 917 switch (open->op_claim_type) { 918 case NFS4_OPEN_CLAIM_NULL: 919 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 920 READ_BUF(4); 921 open->op_fname.len = be32_to_cpup(p++); 922 READ_BUF(open->op_fname.len); 923 SAVEMEM(open->op_fname.data, open->op_fname.len); 924 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 925 return status; 926 break; 927 case NFS4_OPEN_CLAIM_PREVIOUS: 928 READ_BUF(4); 929 open->op_delegate_type = be32_to_cpup(p++); 930 break; 931 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 933 if (status) 934 return status; 935 READ_BUF(4); 936 open->op_fname.len = be32_to_cpup(p++); 937 READ_BUF(open->op_fname.len); 938 SAVEMEM(open->op_fname.data, open->op_fname.len); 939 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 940 return status; 941 break; 942 case NFS4_OPEN_CLAIM_FH: 943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 944 if (argp->minorversion < 1) 945 goto xdr_error; 946 /* void */ 947 break; 948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 949 if (argp->minorversion < 1) 950 goto xdr_error; 951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 952 if (status) 953 return status; 954 break; 955 default: 956 goto xdr_error; 957 } 958 959 DECODE_TAIL; 960 } 961 962 static __be32 963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 964 { 965 DECODE_HEAD; 966 967 if (argp->minorversion >= 1) 968 return nfserr_notsupp; 969 970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 971 if (status) 972 return status; 973 READ_BUF(4); 974 open_conf->oc_seqid = be32_to_cpup(p++); 975 976 DECODE_TAIL; 977 } 978 979 static __be32 980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 981 { 982 DECODE_HEAD; 983 984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 985 if (status) 986 return status; 987 READ_BUF(4); 988 open_down->od_seqid = be32_to_cpup(p++); 989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 990 &open_down->od_deleg_want, NULL); 991 if (status) 992 return status; 993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 994 if (status) 995 return status; 996 DECODE_TAIL; 997 } 998 999 static __be32 1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 1001 { 1002 DECODE_HEAD; 1003 1004 READ_BUF(4); 1005 putfh->pf_fhlen = be32_to_cpup(p++); 1006 if (putfh->pf_fhlen > NFS4_FHSIZE) 1007 goto xdr_error; 1008 READ_BUF(putfh->pf_fhlen); 1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 1010 1011 DECODE_TAIL; 1012 } 1013 1014 static __be32 1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) 1016 { 1017 if (argp->minorversion == 0) 1018 return nfs_ok; 1019 return nfserr_notsupp; 1020 } 1021 1022 static __be32 1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 1024 { 1025 DECODE_HEAD; 1026 1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 1028 if (status) 1029 return status; 1030 READ_BUF(12); 1031 p = xdr_decode_hyper(p, &read->rd_offset); 1032 read->rd_length = be32_to_cpup(p++); 1033 1034 DECODE_TAIL; 1035 } 1036 1037 static __be32 1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 1039 { 1040 DECODE_HEAD; 1041 1042 READ_BUF(24); 1043 p = xdr_decode_hyper(p, &readdir->rd_cookie); 1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 1045 readdir->rd_dircount = be32_to_cpup(p++); 1046 readdir->rd_maxcount = be32_to_cpup(p++); 1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 1048 goto out; 1049 1050 DECODE_TAIL; 1051 } 1052 1053 static __be32 1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 1055 { 1056 DECODE_HEAD; 1057 1058 READ_BUF(4); 1059 remove->rm_namelen = be32_to_cpup(p++); 1060 READ_BUF(remove->rm_namelen); 1061 SAVEMEM(remove->rm_name, remove->rm_namelen); 1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 1063 return status; 1064 1065 DECODE_TAIL; 1066 } 1067 1068 static __be32 1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 1070 { 1071 DECODE_HEAD; 1072 1073 READ_BUF(4); 1074 rename->rn_snamelen = be32_to_cpup(p++); 1075 READ_BUF(rename->rn_snamelen); 1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1077 READ_BUF(4); 1078 rename->rn_tnamelen = be32_to_cpup(p++); 1079 READ_BUF(rename->rn_tnamelen); 1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1082 return status; 1083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1084 return status; 1085 1086 DECODE_TAIL; 1087 } 1088 1089 static __be32 1090 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1091 { 1092 DECODE_HEAD; 1093 1094 if (argp->minorversion >= 1) 1095 return nfserr_notsupp; 1096 1097 READ_BUF(sizeof(clientid_t)); 1098 COPYMEM(clientid, sizeof(clientid_t)); 1099 1100 DECODE_TAIL; 1101 } 1102 1103 static __be32 1104 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1105 struct nfsd4_secinfo *secinfo) 1106 { 1107 DECODE_HEAD; 1108 1109 READ_BUF(4); 1110 secinfo->si_namelen = be32_to_cpup(p++); 1111 READ_BUF(secinfo->si_namelen); 1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1113 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1114 if (status) 1115 return status; 1116 DECODE_TAIL; 1117 } 1118 1119 static __be32 1120 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1121 struct nfsd4_secinfo_no_name *sin) 1122 { 1123 DECODE_HEAD; 1124 1125 READ_BUF(4); 1126 sin->sin_style = be32_to_cpup(p++); 1127 DECODE_TAIL; 1128 } 1129 1130 static __be32 1131 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1132 { 1133 __be32 status; 1134 1135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1136 if (status) 1137 return status; 1138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1139 &setattr->sa_acl, &setattr->sa_label); 1140 } 1141 1142 static __be32 1143 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1144 { 1145 DECODE_HEAD; 1146 1147 if (argp->minorversion >= 1) 1148 return nfserr_notsupp; 1149 1150 READ_BUF(NFS4_VERIFIER_SIZE); 1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1152 1153 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1154 if (status) 1155 return nfserr_bad_xdr; 1156 READ_BUF(8); 1157 setclientid->se_callback_prog = be32_to_cpup(p++); 1158 setclientid->se_callback_netid_len = be32_to_cpup(p++); 1159 READ_BUF(setclientid->se_callback_netid_len); 1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1161 READ_BUF(4); 1162 setclientid->se_callback_addr_len = be32_to_cpup(p++); 1163 1164 READ_BUF(setclientid->se_callback_addr_len); 1165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1166 READ_BUF(4); 1167 setclientid->se_callback_ident = be32_to_cpup(p++); 1168 1169 DECODE_TAIL; 1170 } 1171 1172 static __be32 1173 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1174 { 1175 DECODE_HEAD; 1176 1177 if (argp->minorversion >= 1) 1178 return nfserr_notsupp; 1179 1180 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1181 COPYMEM(&scd_c->sc_clientid, 8); 1182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1183 1184 DECODE_TAIL; 1185 } 1186 1187 /* Also used for NVERIFY */ 1188 static __be32 1189 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1190 { 1191 DECODE_HEAD; 1192 1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1194 goto out; 1195 1196 /* For convenience's sake, we compare raw xdr'd attributes in 1197 * nfsd4_proc_verify */ 1198 1199 READ_BUF(4); 1200 verify->ve_attrlen = be32_to_cpup(p++); 1201 READ_BUF(verify->ve_attrlen); 1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1203 1204 DECODE_TAIL; 1205 } 1206 1207 static __be32 1208 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1209 { 1210 int avail; 1211 int len; 1212 DECODE_HEAD; 1213 1214 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1215 if (status) 1216 return status; 1217 READ_BUF(16); 1218 p = xdr_decode_hyper(p, &write->wr_offset); 1219 write->wr_stable_how = be32_to_cpup(p++); 1220 if (write->wr_stable_how > 2) 1221 goto xdr_error; 1222 write->wr_buflen = be32_to_cpup(p++); 1223 1224 /* Sorry .. no magic macros for this.. * 1225 * READ_BUF(write->wr_buflen); 1226 * SAVEMEM(write->wr_buf, write->wr_buflen); 1227 */ 1228 avail = (char*)argp->end - (char*)argp->p; 1229 if (avail + argp->pagelen < write->wr_buflen) { 1230 dprintk("NFSD: xdr error (%s:%d)\n", 1231 __FILE__, __LINE__); 1232 goto xdr_error; 1233 } 1234 write->wr_head.iov_base = p; 1235 write->wr_head.iov_len = avail; 1236 write->wr_pagelist = argp->pagelist; 1237 1238 len = XDR_QUADLEN(write->wr_buflen) << 2; 1239 if (len >= avail) { 1240 int pages; 1241 1242 len -= avail; 1243 1244 pages = len >> PAGE_SHIFT; 1245 argp->pagelist += pages; 1246 argp->pagelen -= pages * PAGE_SIZE; 1247 len -= pages * PAGE_SIZE; 1248 1249 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1250 argp->pagelist++; 1251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1252 } 1253 argp->p += XDR_QUADLEN(len); 1254 1255 DECODE_TAIL; 1256 } 1257 1258 static __be32 1259 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1260 { 1261 DECODE_HEAD; 1262 1263 if (argp->minorversion >= 1) 1264 return nfserr_notsupp; 1265 1266 READ_BUF(12); 1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1268 rlockowner->rl_owner.len = be32_to_cpup(p++); 1269 READ_BUF(rlockowner->rl_owner.len); 1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1271 1272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1273 return nfserr_inval; 1274 DECODE_TAIL; 1275 } 1276 1277 static __be32 1278 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1279 struct nfsd4_exchange_id *exid) 1280 { 1281 int dummy, tmp; 1282 DECODE_HEAD; 1283 1284 READ_BUF(NFS4_VERIFIER_SIZE); 1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1286 1287 status = nfsd4_decode_opaque(argp, &exid->clname); 1288 if (status) 1289 return nfserr_bad_xdr; 1290 1291 READ_BUF(4); 1292 exid->flags = be32_to_cpup(p++); 1293 1294 /* Ignore state_protect4_a */ 1295 READ_BUF(4); 1296 exid->spa_how = be32_to_cpup(p++); 1297 switch (exid->spa_how) { 1298 case SP4_NONE: 1299 break; 1300 case SP4_MACH_CRED: 1301 /* spo_must_enforce */ 1302 status = nfsd4_decode_bitmap(argp, 1303 exid->spo_must_enforce); 1304 if (status) 1305 goto out; 1306 /* spo_must_allow */ 1307 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); 1308 if (status) 1309 goto out; 1310 break; 1311 case SP4_SSV: 1312 /* ssp_ops */ 1313 READ_BUF(4); 1314 dummy = be32_to_cpup(p++); 1315 READ_BUF(dummy * 4); 1316 p += dummy; 1317 1318 READ_BUF(4); 1319 dummy = be32_to_cpup(p++); 1320 READ_BUF(dummy * 4); 1321 p += dummy; 1322 1323 /* ssp_hash_algs<> */ 1324 READ_BUF(4); 1325 tmp = be32_to_cpup(p++); 1326 while (tmp--) { 1327 READ_BUF(4); 1328 dummy = be32_to_cpup(p++); 1329 READ_BUF(dummy); 1330 p += XDR_QUADLEN(dummy); 1331 } 1332 1333 /* ssp_encr_algs<> */ 1334 READ_BUF(4); 1335 tmp = be32_to_cpup(p++); 1336 while (tmp--) { 1337 READ_BUF(4); 1338 dummy = be32_to_cpup(p++); 1339 READ_BUF(dummy); 1340 p += XDR_QUADLEN(dummy); 1341 } 1342 1343 /* ssp_window and ssp_num_gss_handles */ 1344 READ_BUF(8); 1345 dummy = be32_to_cpup(p++); 1346 dummy = be32_to_cpup(p++); 1347 break; 1348 default: 1349 goto xdr_error; 1350 } 1351 1352 /* Ignore Implementation ID */ 1353 READ_BUF(4); /* nfs_impl_id4 array length */ 1354 dummy = be32_to_cpup(p++); 1355 1356 if (dummy > 1) 1357 goto xdr_error; 1358 1359 if (dummy == 1) { 1360 /* nii_domain */ 1361 READ_BUF(4); 1362 dummy = be32_to_cpup(p++); 1363 READ_BUF(dummy); 1364 p += XDR_QUADLEN(dummy); 1365 1366 /* nii_name */ 1367 READ_BUF(4); 1368 dummy = be32_to_cpup(p++); 1369 READ_BUF(dummy); 1370 p += XDR_QUADLEN(dummy); 1371 1372 /* nii_date */ 1373 READ_BUF(12); 1374 p += 3; 1375 } 1376 DECODE_TAIL; 1377 } 1378 1379 static __be32 1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1381 struct nfsd4_create_session *sess) 1382 { 1383 DECODE_HEAD; 1384 u32 dummy; 1385 1386 READ_BUF(16); 1387 COPYMEM(&sess->clientid, 8); 1388 sess->seqid = be32_to_cpup(p++); 1389 sess->flags = be32_to_cpup(p++); 1390 1391 /* Fore channel attrs */ 1392 READ_BUF(28); 1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++); 1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++); 1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++); 1397 sess->fore_channel.maxops = be32_to_cpup(p++); 1398 sess->fore_channel.maxreqs = be32_to_cpup(p++); 1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); 1400 if (sess->fore_channel.nr_rdma_attrs == 1) { 1401 READ_BUF(4); 1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++); 1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1404 dprintk("Too many fore channel attr bitmaps!\n"); 1405 goto xdr_error; 1406 } 1407 1408 /* Back channel attrs */ 1409 READ_BUF(28); 1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ 1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++); 1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++); 1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++); 1414 sess->back_channel.maxops = be32_to_cpup(p++); 1415 sess->back_channel.maxreqs = be32_to_cpup(p++); 1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); 1417 if (sess->back_channel.nr_rdma_attrs == 1) { 1418 READ_BUF(4); 1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++); 1420 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1421 dprintk("Too many back channel attr bitmaps!\n"); 1422 goto xdr_error; 1423 } 1424 1425 READ_BUF(4); 1426 sess->callback_prog = be32_to_cpup(p++); 1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1428 DECODE_TAIL; 1429 } 1430 1431 static __be32 1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1433 struct nfsd4_destroy_session *destroy_session) 1434 { 1435 DECODE_HEAD; 1436 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1438 1439 DECODE_TAIL; 1440 } 1441 1442 static __be32 1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1444 struct nfsd4_free_stateid *free_stateid) 1445 { 1446 DECODE_HEAD; 1447 1448 READ_BUF(sizeof(stateid_t)); 1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); 1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1451 1452 DECODE_TAIL; 1453 } 1454 1455 static __be32 1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1457 struct nfsd4_sequence *seq) 1458 { 1459 DECODE_HEAD; 1460 1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1463 seq->seqid = be32_to_cpup(p++); 1464 seq->slotid = be32_to_cpup(p++); 1465 seq->maxslots = be32_to_cpup(p++); 1466 seq->cachethis = be32_to_cpup(p++); 1467 1468 DECODE_TAIL; 1469 } 1470 1471 static __be32 1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1473 { 1474 int i; 1475 __be32 *p, status; 1476 struct nfsd4_test_stateid_id *stateid; 1477 1478 READ_BUF(4); 1479 test_stateid->ts_num_ids = ntohl(*p++); 1480 1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1482 1483 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1484 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); 1485 if (!stateid) { 1486 status = nfserrno(-ENOMEM); 1487 goto out; 1488 } 1489 1490 INIT_LIST_HEAD(&stateid->ts_id_list); 1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1492 1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1494 if (status) 1495 goto out; 1496 } 1497 1498 status = 0; 1499 out: 1500 return status; 1501 xdr_error: 1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1503 status = nfserr_bad_xdr; 1504 goto out; 1505 } 1506 1507 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1508 { 1509 DECODE_HEAD; 1510 1511 READ_BUF(8); 1512 COPYMEM(&dc->clientid, 8); 1513 1514 DECODE_TAIL; 1515 } 1516 1517 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1518 { 1519 DECODE_HEAD; 1520 1521 READ_BUF(4); 1522 rc->rca_one_fs = be32_to_cpup(p++); 1523 1524 DECODE_TAIL; 1525 } 1526 1527 #ifdef CONFIG_NFSD_PNFS 1528 static __be32 1529 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, 1530 struct nfsd4_getdeviceinfo *gdev) 1531 { 1532 DECODE_HEAD; 1533 u32 num, i; 1534 1535 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); 1536 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); 1537 gdev->gd_layout_type = be32_to_cpup(p++); 1538 gdev->gd_maxcount = be32_to_cpup(p++); 1539 num = be32_to_cpup(p++); 1540 if (num) { 1541 READ_BUF(4 * num); 1542 gdev->gd_notify_types = be32_to_cpup(p++); 1543 for (i = 1; i < num; i++) { 1544 if (be32_to_cpup(p++)) { 1545 status = nfserr_inval; 1546 goto out; 1547 } 1548 } 1549 } 1550 DECODE_TAIL; 1551 } 1552 1553 static __be32 1554 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, 1555 struct nfsd4_layoutget *lgp) 1556 { 1557 DECODE_HEAD; 1558 1559 READ_BUF(36); 1560 lgp->lg_signal = be32_to_cpup(p++); 1561 lgp->lg_layout_type = be32_to_cpup(p++); 1562 lgp->lg_seg.iomode = be32_to_cpup(p++); 1563 p = xdr_decode_hyper(p, &lgp->lg_seg.offset); 1564 p = xdr_decode_hyper(p, &lgp->lg_seg.length); 1565 p = xdr_decode_hyper(p, &lgp->lg_minlength); 1566 1567 status = nfsd4_decode_stateid(argp, &lgp->lg_sid); 1568 if (status) 1569 return status; 1570 1571 READ_BUF(4); 1572 lgp->lg_maxcount = be32_to_cpup(p++); 1573 1574 DECODE_TAIL; 1575 } 1576 1577 static __be32 1578 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, 1579 struct nfsd4_layoutcommit *lcp) 1580 { 1581 DECODE_HEAD; 1582 u32 timechange; 1583 1584 READ_BUF(20); 1585 p = xdr_decode_hyper(p, &lcp->lc_seg.offset); 1586 p = xdr_decode_hyper(p, &lcp->lc_seg.length); 1587 lcp->lc_reclaim = be32_to_cpup(p++); 1588 1589 status = nfsd4_decode_stateid(argp, &lcp->lc_sid); 1590 if (status) 1591 return status; 1592 1593 READ_BUF(4); 1594 lcp->lc_newoffset = be32_to_cpup(p++); 1595 if (lcp->lc_newoffset) { 1596 READ_BUF(8); 1597 p = xdr_decode_hyper(p, &lcp->lc_last_wr); 1598 } else 1599 lcp->lc_last_wr = 0; 1600 READ_BUF(4); 1601 timechange = be32_to_cpup(p++); 1602 if (timechange) { 1603 status = nfsd4_decode_time(argp, &lcp->lc_mtime); 1604 if (status) 1605 return status; 1606 } else { 1607 lcp->lc_mtime.tv_nsec = UTIME_NOW; 1608 } 1609 READ_BUF(8); 1610 lcp->lc_layout_type = be32_to_cpup(p++); 1611 1612 /* 1613 * Save the layout update in XDR format and let the layout driver deal 1614 * with it later. 1615 */ 1616 lcp->lc_up_len = be32_to_cpup(p++); 1617 if (lcp->lc_up_len > 0) { 1618 READ_BUF(lcp->lc_up_len); 1619 READMEM(lcp->lc_up_layout, lcp->lc_up_len); 1620 } 1621 1622 DECODE_TAIL; 1623 } 1624 1625 static __be32 1626 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, 1627 struct nfsd4_layoutreturn *lrp) 1628 { 1629 DECODE_HEAD; 1630 1631 READ_BUF(16); 1632 lrp->lr_reclaim = be32_to_cpup(p++); 1633 lrp->lr_layout_type = be32_to_cpup(p++); 1634 lrp->lr_seg.iomode = be32_to_cpup(p++); 1635 lrp->lr_return_type = be32_to_cpup(p++); 1636 if (lrp->lr_return_type == RETURN_FILE) { 1637 READ_BUF(16); 1638 p = xdr_decode_hyper(p, &lrp->lr_seg.offset); 1639 p = xdr_decode_hyper(p, &lrp->lr_seg.length); 1640 1641 status = nfsd4_decode_stateid(argp, &lrp->lr_sid); 1642 if (status) 1643 return status; 1644 1645 READ_BUF(4); 1646 lrp->lrf_body_len = be32_to_cpup(p++); 1647 if (lrp->lrf_body_len > 0) { 1648 READ_BUF(lrp->lrf_body_len); 1649 READMEM(lrp->lrf_body, lrp->lrf_body_len); 1650 } 1651 } else { 1652 lrp->lr_seg.offset = 0; 1653 lrp->lr_seg.length = NFS4_MAX_UINT64; 1654 } 1655 1656 DECODE_TAIL; 1657 } 1658 #endif /* CONFIG_NFSD_PNFS */ 1659 1660 static __be32 1661 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, 1662 struct nfsd4_fallocate *fallocate) 1663 { 1664 DECODE_HEAD; 1665 1666 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); 1667 if (status) 1668 return status; 1669 1670 READ_BUF(16); 1671 p = xdr_decode_hyper(p, &fallocate->falloc_offset); 1672 xdr_decode_hyper(p, &fallocate->falloc_length); 1673 1674 DECODE_TAIL; 1675 } 1676 1677 static __be32 1678 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) 1679 { 1680 DECODE_HEAD; 1681 1682 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); 1683 if (status) 1684 return status; 1685 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); 1686 if (status) 1687 return status; 1688 1689 READ_BUF(8 + 8 + 8); 1690 p = xdr_decode_hyper(p, &clone->cl_src_pos); 1691 p = xdr_decode_hyper(p, &clone->cl_dst_pos); 1692 p = xdr_decode_hyper(p, &clone->cl_count); 1693 DECODE_TAIL; 1694 } 1695 1696 static __be32 1697 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) 1698 { 1699 DECODE_HEAD; 1700 unsigned int tmp; 1701 1702 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); 1703 if (status) 1704 return status; 1705 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); 1706 if (status) 1707 return status; 1708 1709 READ_BUF(8 + 8 + 8 + 4 + 4 + 4); 1710 p = xdr_decode_hyper(p, ©->cp_src_pos); 1711 p = xdr_decode_hyper(p, ©->cp_dst_pos); 1712 p = xdr_decode_hyper(p, ©->cp_count); 1713 copy->cp_consecutive = be32_to_cpup(p++); 1714 copy->cp_synchronous = be32_to_cpup(p++); 1715 tmp = be32_to_cpup(p); /* Source server list not supported */ 1716 1717 DECODE_TAIL; 1718 } 1719 1720 static __be32 1721 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) 1722 { 1723 DECODE_HEAD; 1724 1725 status = nfsd4_decode_stateid(argp, &seek->seek_stateid); 1726 if (status) 1727 return status; 1728 1729 READ_BUF(8 + 4); 1730 p = xdr_decode_hyper(p, &seek->seek_offset); 1731 seek->seek_whence = be32_to_cpup(p); 1732 1733 DECODE_TAIL; 1734 } 1735 1736 static __be32 1737 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1738 { 1739 return nfs_ok; 1740 } 1741 1742 static __be32 1743 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1744 { 1745 return nfserr_notsupp; 1746 } 1747 1748 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1749 1750 static nfsd4_dec nfsd4_dec_ops[] = { 1751 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1752 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1753 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1754 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1755 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1756 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1757 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1758 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1759 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1760 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1761 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1762 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1763 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1764 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1765 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1766 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1767 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1768 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1769 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1770 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1771 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, 1772 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1773 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1774 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1775 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1776 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1777 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1778 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1779 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1780 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1781 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1782 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1783 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1784 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1785 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1786 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1787 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1788 1789 /* new operations for NFSv4.1 */ 1790 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1791 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1792 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1793 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1794 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1795 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1796 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1797 #ifdef CONFIG_NFSD_PNFS 1798 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, 1799 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1800 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, 1801 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, 1802 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, 1803 #else 1804 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1805 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1806 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1807 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1808 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1809 #endif 1810 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1811 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1812 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1813 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1814 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1815 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1816 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1817 1818 /* new operations for NFSv4.2 */ 1819 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1820 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, 1821 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, 1822 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, 1823 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, 1824 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, 1825 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, 1826 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, 1827 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1828 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, 1829 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, 1830 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1831 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, 1832 }; 1833 1834 static inline bool 1835 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) 1836 { 1837 if (op->opnum < FIRST_NFS4_OP) 1838 return false; 1839 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) 1840 return false; 1841 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) 1842 return false; 1843 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) 1844 return false; 1845 return true; 1846 } 1847 1848 static __be32 1849 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1850 { 1851 DECODE_HEAD; 1852 struct nfsd4_op *op; 1853 bool cachethis = false; 1854 int auth_slack= argp->rqstp->rq_auth_slack; 1855 int max_reply = auth_slack + 8; /* opcnt, status */ 1856 int readcount = 0; 1857 int readbytes = 0; 1858 int i; 1859 1860 READ_BUF(4); 1861 argp->taglen = be32_to_cpup(p++); 1862 READ_BUF(argp->taglen); 1863 SAVEMEM(argp->tag, argp->taglen); 1864 READ_BUF(8); 1865 argp->minorversion = be32_to_cpup(p++); 1866 argp->opcnt = be32_to_cpup(p++); 1867 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); 1868 1869 if (argp->taglen > NFSD4_MAX_TAGLEN) 1870 goto xdr_error; 1871 if (argp->opcnt > 100) 1872 goto xdr_error; 1873 1874 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1875 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1876 if (!argp->ops) { 1877 argp->ops = argp->iops; 1878 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1879 goto xdr_error; 1880 } 1881 } 1882 1883 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) 1884 argp->opcnt = 0; 1885 1886 for (i = 0; i < argp->opcnt; i++) { 1887 op = &argp->ops[i]; 1888 op->replay = NULL; 1889 1890 READ_BUF(4); 1891 op->opnum = be32_to_cpup(p++); 1892 1893 if (nfsd4_opnum_in_range(argp, op)) 1894 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); 1895 else { 1896 op->opnum = OP_ILLEGAL; 1897 op->status = nfserr_op_illegal; 1898 } 1899 /* 1900 * We'll try to cache the result in the DRC if any one 1901 * op in the compound wants to be cached: 1902 */ 1903 cachethis |= nfsd4_cache_this_op(op); 1904 1905 if (op->opnum == OP_READ) { 1906 readcount++; 1907 readbytes += nfsd4_max_reply(argp->rqstp, op); 1908 } else 1909 max_reply += nfsd4_max_reply(argp->rqstp, op); 1910 /* 1911 * OP_LOCK may return a conflicting lock. (Special case 1912 * because it will just skip encoding this if it runs 1913 * out of xdr buffer space, and it is the only operation 1914 * that behaves this way.) 1915 */ 1916 if (op->opnum == OP_LOCK) 1917 max_reply += NFS4_OPAQUE_LIMIT; 1918 1919 if (op->status) { 1920 argp->opcnt = i+1; 1921 break; 1922 } 1923 } 1924 /* Sessions make the DRC unnecessary: */ 1925 if (argp->minorversion) 1926 cachethis = false; 1927 svc_reserve(argp->rqstp, max_reply + readbytes); 1928 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1929 1930 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) 1931 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); 1932 1933 DECODE_TAIL; 1934 } 1935 1936 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) 1937 { 1938 if (IS_I_VERSION(inode)) { 1939 p = xdr_encode_hyper(p, inode->i_version); 1940 } else { 1941 *p++ = cpu_to_be32(stat->ctime.tv_sec); 1942 *p++ = cpu_to_be32(stat->ctime.tv_nsec); 1943 } 1944 return p; 1945 } 1946 1947 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) 1948 { 1949 *p++ = cpu_to_be32(c->atomic); 1950 if (c->change_supported) { 1951 p = xdr_encode_hyper(p, c->before_change); 1952 p = xdr_encode_hyper(p, c->after_change); 1953 } else { 1954 *p++ = cpu_to_be32(c->before_ctime_sec); 1955 *p++ = cpu_to_be32(c->before_ctime_nsec); 1956 *p++ = cpu_to_be32(c->after_ctime_sec); 1957 *p++ = cpu_to_be32(c->after_ctime_nsec); 1958 } 1959 return p; 1960 } 1961 1962 /* Encode as an array of strings the string given with components 1963 * separated @sep, escaped with esc_enter and esc_exit. 1964 */ 1965 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, 1966 char *components, char esc_enter, 1967 char esc_exit) 1968 { 1969 __be32 *p; 1970 __be32 pathlen; 1971 int pathlen_offset; 1972 int strlen, count=0; 1973 char *str, *end, *next; 1974 1975 dprintk("nfsd4_encode_components(%s)\n", components); 1976 1977 pathlen_offset = xdr->buf->len; 1978 p = xdr_reserve_space(xdr, 4); 1979 if (!p) 1980 return nfserr_resource; 1981 p++; /* We will fill this in with @count later */ 1982 1983 end = str = components; 1984 while (*end) { 1985 bool found_esc = false; 1986 1987 /* try to parse as esc_start, ..., esc_end, sep */ 1988 if (*str == esc_enter) { 1989 for (; *end && (*end != esc_exit); end++) 1990 /* find esc_exit or end of string */; 1991 next = end + 1; 1992 if (*end && (!*next || *next == sep)) { 1993 str++; 1994 found_esc = true; 1995 } 1996 } 1997 1998 if (!found_esc) 1999 for (; *end && (*end != sep); end++) 2000 /* find sep or end of string */; 2001 2002 strlen = end - str; 2003 if (strlen) { 2004 p = xdr_reserve_space(xdr, strlen + 4); 2005 if (!p) 2006 return nfserr_resource; 2007 p = xdr_encode_opaque(p, str, strlen); 2008 count++; 2009 } 2010 else 2011 end++; 2012 if (found_esc) 2013 end = next; 2014 2015 str = end; 2016 } 2017 pathlen = htonl(count); 2018 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); 2019 return 0; 2020 } 2021 2022 /* Encode as an array of strings the string given with components 2023 * separated @sep. 2024 */ 2025 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, 2026 char *components) 2027 { 2028 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); 2029 } 2030 2031 /* 2032 * encode a location element of a fs_locations structure 2033 */ 2034 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, 2035 struct nfsd4_fs_location *location) 2036 { 2037 __be32 status; 2038 2039 status = nfsd4_encode_components_esc(xdr, ':', location->hosts, 2040 '[', ']'); 2041 if (status) 2042 return status; 2043 status = nfsd4_encode_components(xdr, '/', location->path); 2044 if (status) 2045 return status; 2046 return 0; 2047 } 2048 2049 /* 2050 * Encode a path in RFC3530 'pathname4' format 2051 */ 2052 static __be32 nfsd4_encode_path(struct xdr_stream *xdr, 2053 const struct path *root, 2054 const struct path *path) 2055 { 2056 struct path cur = *path; 2057 __be32 *p; 2058 struct dentry **components = NULL; 2059 unsigned int ncomponents = 0; 2060 __be32 err = nfserr_jukebox; 2061 2062 dprintk("nfsd4_encode_components("); 2063 2064 path_get(&cur); 2065 /* First walk the path up to the nfsd root, and store the 2066 * dentries/path components in an array. 2067 */ 2068 for (;;) { 2069 if (path_equal(&cur, root)) 2070 break; 2071 if (cur.dentry == cur.mnt->mnt_root) { 2072 if (follow_up(&cur)) 2073 continue; 2074 goto out_free; 2075 } 2076 if ((ncomponents & 15) == 0) { 2077 struct dentry **new; 2078 new = krealloc(components, 2079 sizeof(*new) * (ncomponents + 16), 2080 GFP_KERNEL); 2081 if (!new) 2082 goto out_free; 2083 components = new; 2084 } 2085 components[ncomponents++] = cur.dentry; 2086 cur.dentry = dget_parent(cur.dentry); 2087 } 2088 err = nfserr_resource; 2089 p = xdr_reserve_space(xdr, 4); 2090 if (!p) 2091 goto out_free; 2092 *p++ = cpu_to_be32(ncomponents); 2093 2094 while (ncomponents) { 2095 struct dentry *dentry = components[ncomponents - 1]; 2096 unsigned int len; 2097 2098 spin_lock(&dentry->d_lock); 2099 len = dentry->d_name.len; 2100 p = xdr_reserve_space(xdr, len + 4); 2101 if (!p) { 2102 spin_unlock(&dentry->d_lock); 2103 goto out_free; 2104 } 2105 p = xdr_encode_opaque(p, dentry->d_name.name, len); 2106 dprintk("/%pd", dentry); 2107 spin_unlock(&dentry->d_lock); 2108 dput(dentry); 2109 ncomponents--; 2110 } 2111 2112 err = 0; 2113 out_free: 2114 dprintk(")\n"); 2115 while (ncomponents) 2116 dput(components[--ncomponents]); 2117 kfree(components); 2118 path_put(&cur); 2119 return err; 2120 } 2121 2122 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, 2123 struct svc_rqst *rqstp, const struct path *path) 2124 { 2125 struct svc_export *exp_ps; 2126 __be32 res; 2127 2128 exp_ps = rqst_find_fsidzero_export(rqstp); 2129 if (IS_ERR(exp_ps)) 2130 return nfserrno(PTR_ERR(exp_ps)); 2131 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); 2132 exp_put(exp_ps); 2133 return res; 2134 } 2135 2136 /* 2137 * encode a fs_locations structure 2138 */ 2139 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, 2140 struct svc_rqst *rqstp, struct svc_export *exp) 2141 { 2142 __be32 status; 2143 int i; 2144 __be32 *p; 2145 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 2146 2147 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); 2148 if (status) 2149 return status; 2150 p = xdr_reserve_space(xdr, 4); 2151 if (!p) 2152 return nfserr_resource; 2153 *p++ = cpu_to_be32(fslocs->locations_count); 2154 for (i=0; i<fslocs->locations_count; i++) { 2155 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); 2156 if (status) 2157 return status; 2158 } 2159 return 0; 2160 } 2161 2162 static u32 nfs4_file_type(umode_t mode) 2163 { 2164 switch (mode & S_IFMT) { 2165 case S_IFIFO: return NF4FIFO; 2166 case S_IFCHR: return NF4CHR; 2167 case S_IFDIR: return NF4DIR; 2168 case S_IFBLK: return NF4BLK; 2169 case S_IFLNK: return NF4LNK; 2170 case S_IFREG: return NF4REG; 2171 case S_IFSOCK: return NF4SOCK; 2172 default: return NF4BAD; 2173 }; 2174 } 2175 2176 static inline __be32 2177 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2178 struct nfs4_ace *ace) 2179 { 2180 if (ace->whotype != NFS4_ACL_WHO_NAMED) 2181 return nfs4_acl_write_who(xdr, ace->whotype); 2182 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 2183 return nfsd4_encode_group(xdr, rqstp, ace->who_gid); 2184 else 2185 return nfsd4_encode_user(xdr, rqstp, ace->who_uid); 2186 } 2187 2188 static inline __be32 2189 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) 2190 { 2191 __be32 *p; 2192 unsigned long i = hweight_long(layout_types); 2193 2194 p = xdr_reserve_space(xdr, 4 + 4 * i); 2195 if (!p) 2196 return nfserr_resource; 2197 2198 *p++ = cpu_to_be32(i); 2199 2200 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) 2201 if (layout_types & (1 << i)) 2202 *p++ = cpu_to_be32(i); 2203 2204 return 0; 2205 } 2206 2207 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 2208 FATTR4_WORD0_RDATTR_ERROR) 2209 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 2210 #define WORD2_ABSENT_FS_ATTRS 0 2211 2212 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2213 static inline __be32 2214 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2215 void *context, int len) 2216 { 2217 __be32 *p; 2218 2219 p = xdr_reserve_space(xdr, len + 4 + 4 + 4); 2220 if (!p) 2221 return nfserr_resource; 2222 2223 /* 2224 * For now we use a 0 here to indicate the null translation; in 2225 * the future we may place a call to translation code here. 2226 */ 2227 *p++ = cpu_to_be32(0); /* lfs */ 2228 *p++ = cpu_to_be32(0); /* pi */ 2229 p = xdr_encode_opaque(p, context, len); 2230 return 0; 2231 } 2232 #else 2233 static inline __be32 2234 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, 2235 void *context, int len) 2236 { return 0; } 2237 #endif 2238 2239 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) 2240 { 2241 /* As per referral draft: */ 2242 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 2243 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 2244 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 2245 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 2246 *rdattr_err = NFSERR_MOVED; 2247 else 2248 return nfserr_moved; 2249 } 2250 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 2251 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 2252 *bmval2 &= WORD2_ABSENT_FS_ATTRS; 2253 return 0; 2254 } 2255 2256 2257 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 2258 { 2259 struct path path = exp->ex_path; 2260 int err; 2261 2262 path_get(&path); 2263 while (follow_up(&path)) { 2264 if (path.dentry != path.mnt->mnt_root) 2265 break; 2266 } 2267 err = vfs_getattr(&path, stat); 2268 path_put(&path); 2269 return err; 2270 } 2271 2272 static __be32 2273 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) 2274 { 2275 __be32 *p; 2276 2277 if (bmval2) { 2278 p = xdr_reserve_space(xdr, 16); 2279 if (!p) 2280 goto out_resource; 2281 *p++ = cpu_to_be32(3); 2282 *p++ = cpu_to_be32(bmval0); 2283 *p++ = cpu_to_be32(bmval1); 2284 *p++ = cpu_to_be32(bmval2); 2285 } else if (bmval1) { 2286 p = xdr_reserve_space(xdr, 12); 2287 if (!p) 2288 goto out_resource; 2289 *p++ = cpu_to_be32(2); 2290 *p++ = cpu_to_be32(bmval0); 2291 *p++ = cpu_to_be32(bmval1); 2292 } else { 2293 p = xdr_reserve_space(xdr, 8); 2294 if (!p) 2295 goto out_resource; 2296 *p++ = cpu_to_be32(1); 2297 *p++ = cpu_to_be32(bmval0); 2298 } 2299 2300 return 0; 2301 out_resource: 2302 return nfserr_resource; 2303 } 2304 2305 /* 2306 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2307 * ourselves. 2308 */ 2309 static __be32 2310 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, 2311 struct svc_export *exp, 2312 struct dentry *dentry, u32 *bmval, 2313 struct svc_rqst *rqstp, int ignore_crossmnt) 2314 { 2315 u32 bmval0 = bmval[0]; 2316 u32 bmval1 = bmval[1]; 2317 u32 bmval2 = bmval[2]; 2318 struct kstat stat; 2319 struct svc_fh *tempfh = NULL; 2320 struct kstatfs statfs; 2321 __be32 *p; 2322 int starting_len = xdr->buf->len; 2323 int attrlen_offset; 2324 __be32 attrlen; 2325 u32 dummy; 2326 u64 dummy64; 2327 u32 rdattr_err = 0; 2328 __be32 status; 2329 int err; 2330 struct nfs4_acl *acl = NULL; 2331 void *context = NULL; 2332 int contextlen; 2333 bool contextsupport = false; 2334 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2335 u32 minorversion = resp->cstate.minorversion; 2336 struct path path = { 2337 .mnt = exp->ex_path.mnt, 2338 .dentry = dentry, 2339 }; 2340 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2341 2342 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2343 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2344 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2345 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2346 2347 if (exp->ex_fslocs.migrated) { 2348 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); 2349 if (status) 2350 goto out; 2351 } 2352 2353 err = vfs_getattr(&path, &stat); 2354 if (err) 2355 goto out_nfserr; 2356 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | 2357 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || 2358 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2359 FATTR4_WORD1_SPACE_TOTAL))) { 2360 err = vfs_statfs(&path, &statfs); 2361 if (err) 2362 goto out_nfserr; 2363 } 2364 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2365 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 2366 status = nfserr_jukebox; 2367 if (!tempfh) 2368 goto out; 2369 fh_init(tempfh, NFS4_FHSIZE); 2370 status = fh_compose(tempfh, exp, dentry, NULL); 2371 if (status) 2372 goto out; 2373 fhp = tempfh; 2374 } 2375 if (bmval0 & FATTR4_WORD0_ACL) { 2376 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2377 if (err == -EOPNOTSUPP) 2378 bmval0 &= ~FATTR4_WORD0_ACL; 2379 else if (err == -EINVAL) { 2380 status = nfserr_attrnotsupp; 2381 goto out; 2382 } else if (err != 0) 2383 goto out_nfserr; 2384 } 2385 2386 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2387 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || 2388 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2389 err = security_inode_getsecctx(d_inode(dentry), 2390 &context, &contextlen); 2391 contextsupport = (err == 0); 2392 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2393 if (err == -EOPNOTSUPP) 2394 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2395 else if (err) 2396 goto out_nfserr; 2397 } 2398 } 2399 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2400 2401 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); 2402 if (status) 2403 goto out; 2404 2405 attrlen_offset = xdr->buf->len; 2406 p = xdr_reserve_space(xdr, 4); 2407 if (!p) 2408 goto out_resource; 2409 p++; /* to be backfilled later */ 2410 2411 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2412 u32 word0 = nfsd_suppattrs0(minorversion); 2413 u32 word1 = nfsd_suppattrs1(minorversion); 2414 u32 word2 = nfsd_suppattrs2(minorversion); 2415 2416 if (!IS_POSIXACL(dentry->d_inode)) 2417 word0 &= ~FATTR4_WORD0_ACL; 2418 if (!contextsupport) 2419 word2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2420 if (!word2) { 2421 p = xdr_reserve_space(xdr, 12); 2422 if (!p) 2423 goto out_resource; 2424 *p++ = cpu_to_be32(2); 2425 *p++ = cpu_to_be32(word0); 2426 *p++ = cpu_to_be32(word1); 2427 } else { 2428 p = xdr_reserve_space(xdr, 16); 2429 if (!p) 2430 goto out_resource; 2431 *p++ = cpu_to_be32(3); 2432 *p++ = cpu_to_be32(word0); 2433 *p++ = cpu_to_be32(word1); 2434 *p++ = cpu_to_be32(word2); 2435 } 2436 } 2437 if (bmval0 & FATTR4_WORD0_TYPE) { 2438 p = xdr_reserve_space(xdr, 4); 2439 if (!p) 2440 goto out_resource; 2441 dummy = nfs4_file_type(stat.mode); 2442 if (dummy == NF4BAD) { 2443 status = nfserr_serverfault; 2444 goto out; 2445 } 2446 *p++ = cpu_to_be32(dummy); 2447 } 2448 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2449 p = xdr_reserve_space(xdr, 4); 2450 if (!p) 2451 goto out_resource; 2452 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2453 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); 2454 else 2455 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| 2456 NFS4_FH_VOL_RENAME); 2457 } 2458 if (bmval0 & FATTR4_WORD0_CHANGE) { 2459 p = xdr_reserve_space(xdr, 8); 2460 if (!p) 2461 goto out_resource; 2462 p = encode_change(p, &stat, d_inode(dentry)); 2463 } 2464 if (bmval0 & FATTR4_WORD0_SIZE) { 2465 p = xdr_reserve_space(xdr, 8); 2466 if (!p) 2467 goto out_resource; 2468 p = xdr_encode_hyper(p, stat.size); 2469 } 2470 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2471 p = xdr_reserve_space(xdr, 4); 2472 if (!p) 2473 goto out_resource; 2474 *p++ = cpu_to_be32(1); 2475 } 2476 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2477 p = xdr_reserve_space(xdr, 4); 2478 if (!p) 2479 goto out_resource; 2480 *p++ = cpu_to_be32(1); 2481 } 2482 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2483 p = xdr_reserve_space(xdr, 4); 2484 if (!p) 2485 goto out_resource; 2486 *p++ = cpu_to_be32(0); 2487 } 2488 if (bmval0 & FATTR4_WORD0_FSID) { 2489 p = xdr_reserve_space(xdr, 16); 2490 if (!p) 2491 goto out_resource; 2492 if (exp->ex_fslocs.migrated) { 2493 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); 2494 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); 2495 } else switch(fsid_source(fhp)) { 2496 case FSIDSOURCE_FSID: 2497 p = xdr_encode_hyper(p, (u64)exp->ex_fsid); 2498 p = xdr_encode_hyper(p, (u64)0); 2499 break; 2500 case FSIDSOURCE_DEV: 2501 *p++ = cpu_to_be32(0); 2502 *p++ = cpu_to_be32(MAJOR(stat.dev)); 2503 *p++ = cpu_to_be32(0); 2504 *p++ = cpu_to_be32(MINOR(stat.dev)); 2505 break; 2506 case FSIDSOURCE_UUID: 2507 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 2508 EX_UUID_LEN); 2509 break; 2510 } 2511 } 2512 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2513 p = xdr_reserve_space(xdr, 4); 2514 if (!p) 2515 goto out_resource; 2516 *p++ = cpu_to_be32(0); 2517 } 2518 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2519 p = xdr_reserve_space(xdr, 4); 2520 if (!p) 2521 goto out_resource; 2522 *p++ = cpu_to_be32(nn->nfsd4_lease); 2523 } 2524 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2525 p = xdr_reserve_space(xdr, 4); 2526 if (!p) 2527 goto out_resource; 2528 *p++ = cpu_to_be32(rdattr_err); 2529 } 2530 if (bmval0 & FATTR4_WORD0_ACL) { 2531 struct nfs4_ace *ace; 2532 2533 if (acl == NULL) { 2534 p = xdr_reserve_space(xdr, 4); 2535 if (!p) 2536 goto out_resource; 2537 2538 *p++ = cpu_to_be32(0); 2539 goto out_acl; 2540 } 2541 p = xdr_reserve_space(xdr, 4); 2542 if (!p) 2543 goto out_resource; 2544 *p++ = cpu_to_be32(acl->naces); 2545 2546 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2547 p = xdr_reserve_space(xdr, 4*3); 2548 if (!p) 2549 goto out_resource; 2550 *p++ = cpu_to_be32(ace->type); 2551 *p++ = cpu_to_be32(ace->flag); 2552 *p++ = cpu_to_be32(ace->access_mask & 2553 NFS4_ACE_MASK_ALL); 2554 status = nfsd4_encode_aclname(xdr, rqstp, ace); 2555 if (status) 2556 goto out; 2557 } 2558 } 2559 out_acl: 2560 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2561 p = xdr_reserve_space(xdr, 4); 2562 if (!p) 2563 goto out_resource; 2564 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? 2565 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2566 } 2567 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2568 p = xdr_reserve_space(xdr, 4); 2569 if (!p) 2570 goto out_resource; 2571 *p++ = cpu_to_be32(1); 2572 } 2573 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2574 p = xdr_reserve_space(xdr, 4); 2575 if (!p) 2576 goto out_resource; 2577 *p++ = cpu_to_be32(0); 2578 } 2579 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2580 p = xdr_reserve_space(xdr, 4); 2581 if (!p) 2582 goto out_resource; 2583 *p++ = cpu_to_be32(1); 2584 } 2585 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2586 p = xdr_reserve_space(xdr, 4); 2587 if (!p) 2588 goto out_resource; 2589 *p++ = cpu_to_be32(1); 2590 } 2591 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2592 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); 2593 if (!p) 2594 goto out_resource; 2595 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, 2596 fhp->fh_handle.fh_size); 2597 } 2598 if (bmval0 & FATTR4_WORD0_FILEID) { 2599 p = xdr_reserve_space(xdr, 8); 2600 if (!p) 2601 goto out_resource; 2602 p = xdr_encode_hyper(p, stat.ino); 2603 } 2604 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2605 p = xdr_reserve_space(xdr, 8); 2606 if (!p) 2607 goto out_resource; 2608 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2609 } 2610 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2611 p = xdr_reserve_space(xdr, 8); 2612 if (!p) 2613 goto out_resource; 2614 p = xdr_encode_hyper(p, (u64) statfs.f_ffree); 2615 } 2616 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2617 p = xdr_reserve_space(xdr, 8); 2618 if (!p) 2619 goto out_resource; 2620 p = xdr_encode_hyper(p, (u64) statfs.f_files); 2621 } 2622 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2623 status = nfsd4_encode_fs_locations(xdr, rqstp, exp); 2624 if (status) 2625 goto out; 2626 } 2627 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2628 p = xdr_reserve_space(xdr, 4); 2629 if (!p) 2630 goto out_resource; 2631 *p++ = cpu_to_be32(1); 2632 } 2633 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2634 p = xdr_reserve_space(xdr, 8); 2635 if (!p) 2636 goto out_resource; 2637 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); 2638 } 2639 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2640 p = xdr_reserve_space(xdr, 4); 2641 if (!p) 2642 goto out_resource; 2643 *p++ = cpu_to_be32(255); 2644 } 2645 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2646 p = xdr_reserve_space(xdr, 4); 2647 if (!p) 2648 goto out_resource; 2649 *p++ = cpu_to_be32(statfs.f_namelen); 2650 } 2651 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2652 p = xdr_reserve_space(xdr, 8); 2653 if (!p) 2654 goto out_resource; 2655 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2656 } 2657 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2658 p = xdr_reserve_space(xdr, 8); 2659 if (!p) 2660 goto out_resource; 2661 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); 2662 } 2663 if (bmval1 & FATTR4_WORD1_MODE) { 2664 p = xdr_reserve_space(xdr, 4); 2665 if (!p) 2666 goto out_resource; 2667 *p++ = cpu_to_be32(stat.mode & S_IALLUGO); 2668 } 2669 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2670 p = xdr_reserve_space(xdr, 4); 2671 if (!p) 2672 goto out_resource; 2673 *p++ = cpu_to_be32(1); 2674 } 2675 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2676 p = xdr_reserve_space(xdr, 4); 2677 if (!p) 2678 goto out_resource; 2679 *p++ = cpu_to_be32(stat.nlink); 2680 } 2681 if (bmval1 & FATTR4_WORD1_OWNER) { 2682 status = nfsd4_encode_user(xdr, rqstp, stat.uid); 2683 if (status) 2684 goto out; 2685 } 2686 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2687 status = nfsd4_encode_group(xdr, rqstp, stat.gid); 2688 if (status) 2689 goto out; 2690 } 2691 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2692 p = xdr_reserve_space(xdr, 8); 2693 if (!p) 2694 goto out_resource; 2695 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); 2696 *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); 2697 } 2698 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2699 p = xdr_reserve_space(xdr, 8); 2700 if (!p) 2701 goto out_resource; 2702 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2703 p = xdr_encode_hyper(p, dummy64); 2704 } 2705 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2706 p = xdr_reserve_space(xdr, 8); 2707 if (!p) 2708 goto out_resource; 2709 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2710 p = xdr_encode_hyper(p, dummy64); 2711 } 2712 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2713 p = xdr_reserve_space(xdr, 8); 2714 if (!p) 2715 goto out_resource; 2716 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2717 p = xdr_encode_hyper(p, dummy64); 2718 } 2719 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2720 p = xdr_reserve_space(xdr, 8); 2721 if (!p) 2722 goto out_resource; 2723 dummy64 = (u64)stat.blocks << 9; 2724 p = xdr_encode_hyper(p, dummy64); 2725 } 2726 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2727 p = xdr_reserve_space(xdr, 12); 2728 if (!p) 2729 goto out_resource; 2730 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); 2731 *p++ = cpu_to_be32(stat.atime.tv_nsec); 2732 } 2733 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2734 p = xdr_reserve_space(xdr, 12); 2735 if (!p) 2736 goto out_resource; 2737 *p++ = cpu_to_be32(0); 2738 *p++ = cpu_to_be32(1); 2739 *p++ = cpu_to_be32(0); 2740 } 2741 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2742 p = xdr_reserve_space(xdr, 12); 2743 if (!p) 2744 goto out_resource; 2745 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); 2746 *p++ = cpu_to_be32(stat.ctime.tv_nsec); 2747 } 2748 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2749 p = xdr_reserve_space(xdr, 12); 2750 if (!p) 2751 goto out_resource; 2752 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); 2753 *p++ = cpu_to_be32(stat.mtime.tv_nsec); 2754 } 2755 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2756 struct kstat parent_stat; 2757 u64 ino = stat.ino; 2758 2759 p = xdr_reserve_space(xdr, 8); 2760 if (!p) 2761 goto out_resource; 2762 /* 2763 * Get parent's attributes if not ignoring crossmount 2764 * and this is the root of a cross-mounted filesystem. 2765 */ 2766 if (ignore_crossmnt == 0 && 2767 dentry == exp->ex_path.mnt->mnt_root) { 2768 err = get_parent_attributes(exp, &parent_stat); 2769 if (err) 2770 goto out_nfserr; 2771 ino = parent_stat.ino; 2772 } 2773 p = xdr_encode_hyper(p, ino); 2774 } 2775 #ifdef CONFIG_NFSD_PNFS 2776 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { 2777 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2778 if (status) 2779 goto out; 2780 } 2781 2782 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { 2783 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); 2784 if (status) 2785 goto out; 2786 } 2787 2788 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { 2789 p = xdr_reserve_space(xdr, 4); 2790 if (!p) 2791 goto out_resource; 2792 *p++ = cpu_to_be32(stat.blksize); 2793 } 2794 #endif /* CONFIG_NFSD_PNFS */ 2795 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2796 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0, 2797 NFSD_SUPPATTR_EXCLCREAT_WORD1, 2798 NFSD_SUPPATTR_EXCLCREAT_WORD2); 2799 if (status) 2800 goto out; 2801 } 2802 2803 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { 2804 status = nfsd4_encode_security_label(xdr, rqstp, context, 2805 contextlen); 2806 if (status) 2807 goto out; 2808 } 2809 2810 attrlen = htonl(xdr->buf->len - attrlen_offset - 4); 2811 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); 2812 status = nfs_ok; 2813 2814 out: 2815 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 2816 if (context) 2817 security_release_secctx(context, contextlen); 2818 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ 2819 kfree(acl); 2820 if (tempfh) { 2821 fh_put(tempfh); 2822 kfree(tempfh); 2823 } 2824 if (status) 2825 xdr_truncate_encode(xdr, starting_len); 2826 return status; 2827 out_nfserr: 2828 status = nfserrno(err); 2829 goto out; 2830 out_resource: 2831 status = nfserr_resource; 2832 goto out; 2833 } 2834 2835 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, 2836 struct xdr_buf *buf, __be32 *p, int bytes) 2837 { 2838 xdr->scratch.iov_len = 0; 2839 memset(buf, 0, sizeof(struct xdr_buf)); 2840 buf->head[0].iov_base = p; 2841 buf->head[0].iov_len = 0; 2842 buf->len = 0; 2843 xdr->buf = buf; 2844 xdr->iov = buf->head; 2845 xdr->p = p; 2846 xdr->end = (void *)p + bytes; 2847 buf->buflen = bytes; 2848 } 2849 2850 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, 2851 struct svc_fh *fhp, struct svc_export *exp, 2852 struct dentry *dentry, u32 *bmval, 2853 struct svc_rqst *rqstp, int ignore_crossmnt) 2854 { 2855 struct xdr_buf dummy; 2856 struct xdr_stream xdr; 2857 __be32 ret; 2858 2859 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); 2860 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, 2861 ignore_crossmnt); 2862 *p = xdr.p; 2863 return ret; 2864 } 2865 2866 static inline int attributes_need_mount(u32 *bmval) 2867 { 2868 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2869 return 1; 2870 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2871 return 1; 2872 return 0; 2873 } 2874 2875 static __be32 2876 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, 2877 const char *name, int namlen) 2878 { 2879 struct svc_export *exp = cd->rd_fhp->fh_export; 2880 struct dentry *dentry; 2881 __be32 nfserr; 2882 int ignore_crossmnt = 0; 2883 2884 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen); 2885 if (IS_ERR(dentry)) 2886 return nfserrno(PTR_ERR(dentry)); 2887 if (d_really_is_negative(dentry)) { 2888 /* 2889 * we're not holding the i_mutex here, so there's 2890 * a window where this directory entry could have gone 2891 * away. 2892 */ 2893 dput(dentry); 2894 return nfserr_noent; 2895 } 2896 2897 exp_get(exp); 2898 /* 2899 * In the case of a mountpoint, the client may be asking for 2900 * attributes that are only properties of the underlying filesystem 2901 * as opposed to the cross-mounted file system. In such a case, 2902 * we will not follow the cross mount and will fill the attribtutes 2903 * directly from the mountpoint dentry. 2904 */ 2905 if (nfsd_mountpoint(dentry, exp)) { 2906 int err; 2907 2908 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2909 && !attributes_need_mount(cd->rd_bmval)) { 2910 ignore_crossmnt = 1; 2911 goto out_encode; 2912 } 2913 /* 2914 * Why the heck aren't we just using nfsd_lookup?? 2915 * Different "."/".." handling? Something else? 2916 * At least, add a comment here to explain.... 2917 */ 2918 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2919 if (err) { 2920 nfserr = nfserrno(err); 2921 goto out_put; 2922 } 2923 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2924 if (nfserr) 2925 goto out_put; 2926 2927 } 2928 out_encode: 2929 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, 2930 cd->rd_rqstp, ignore_crossmnt); 2931 out_put: 2932 dput(dentry); 2933 exp_put(exp); 2934 return nfserr; 2935 } 2936 2937 static __be32 * 2938 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) 2939 { 2940 __be32 *p; 2941 2942 p = xdr_reserve_space(xdr, 20); 2943 if (!p) 2944 return NULL; 2945 *p++ = htonl(2); 2946 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2947 *p++ = htonl(0); /* bmval1 */ 2948 2949 *p++ = htonl(4); /* attribute length */ 2950 *p++ = nfserr; /* no htonl */ 2951 return p; 2952 } 2953 2954 static int 2955 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2956 loff_t offset, u64 ino, unsigned int d_type) 2957 { 2958 struct readdir_cd *ccd = ccdv; 2959 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2960 struct xdr_stream *xdr = cd->xdr; 2961 int start_offset = xdr->buf->len; 2962 int cookie_offset; 2963 u32 name_and_cookie; 2964 int entry_bytes; 2965 __be32 nfserr = nfserr_toosmall; 2966 __be64 wire_offset; 2967 __be32 *p; 2968 2969 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2970 if (name && isdotent(name, namlen)) { 2971 cd->common.err = nfs_ok; 2972 return 0; 2973 } 2974 2975 if (cd->cookie_offset) { 2976 wire_offset = cpu_to_be64(offset); 2977 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, 2978 &wire_offset, 8); 2979 } 2980 2981 p = xdr_reserve_space(xdr, 4); 2982 if (!p) 2983 goto fail; 2984 *p++ = xdr_one; /* mark entry present */ 2985 cookie_offset = xdr->buf->len; 2986 p = xdr_reserve_space(xdr, 3*4 + namlen); 2987 if (!p) 2988 goto fail; 2989 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2990 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2991 2992 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); 2993 switch (nfserr) { 2994 case nfs_ok: 2995 break; 2996 case nfserr_resource: 2997 nfserr = nfserr_toosmall; 2998 goto fail; 2999 case nfserr_noent: 3000 xdr_truncate_encode(xdr, start_offset); 3001 goto skip_entry; 3002 default: 3003 /* 3004 * If the client requested the RDATTR_ERROR attribute, 3005 * we stuff the error code into this attribute 3006 * and continue. If this attribute was not requested, 3007 * then in accordance with the spec, we fail the 3008 * entire READDIR operation(!) 3009 */ 3010 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 3011 goto fail; 3012 p = nfsd4_encode_rdattr_error(xdr, nfserr); 3013 if (p == NULL) { 3014 nfserr = nfserr_toosmall; 3015 goto fail; 3016 } 3017 } 3018 nfserr = nfserr_toosmall; 3019 entry_bytes = xdr->buf->len - start_offset; 3020 if (entry_bytes > cd->rd_maxcount) 3021 goto fail; 3022 cd->rd_maxcount -= entry_bytes; 3023 /* 3024 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so 3025 * let's always let through the first entry, at least: 3026 */ 3027 if (!cd->rd_dircount) 3028 goto fail; 3029 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; 3030 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) 3031 goto fail; 3032 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); 3033 3034 cd->cookie_offset = cookie_offset; 3035 skip_entry: 3036 cd->common.err = nfs_ok; 3037 return 0; 3038 fail: 3039 xdr_truncate_encode(xdr, start_offset); 3040 cd->common.err = nfserr; 3041 return -EINVAL; 3042 } 3043 3044 static __be32 3045 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) 3046 { 3047 __be32 *p; 3048 3049 p = xdr_reserve_space(xdr, sizeof(stateid_t)); 3050 if (!p) 3051 return nfserr_resource; 3052 *p++ = cpu_to_be32(sid->si_generation); 3053 p = xdr_encode_opaque_fixed(p, &sid->si_opaque, 3054 sizeof(stateid_opaque_t)); 3055 return 0; 3056 } 3057 3058 static __be32 3059 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 3060 { 3061 struct xdr_stream *xdr = &resp->xdr; 3062 __be32 *p; 3063 3064 if (!nfserr) { 3065 p = xdr_reserve_space(xdr, 8); 3066 if (!p) 3067 return nfserr_resource; 3068 *p++ = cpu_to_be32(access->ac_supported); 3069 *p++ = cpu_to_be32(access->ac_resp_access); 3070 } 3071 return nfserr; 3072 } 3073 3074 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 3075 { 3076 struct xdr_stream *xdr = &resp->xdr; 3077 __be32 *p; 3078 3079 if (!nfserr) { 3080 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); 3081 if (!p) 3082 return nfserr_resource; 3083 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, 3084 NFS4_MAX_SESSIONID_LEN); 3085 *p++ = cpu_to_be32(bcts->dir); 3086 /* Upshifting from TCP to RDMA is not supported */ 3087 *p++ = cpu_to_be32(0); 3088 } 3089 return nfserr; 3090 } 3091 3092 static __be32 3093 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 3094 { 3095 struct xdr_stream *xdr = &resp->xdr; 3096 3097 if (!nfserr) 3098 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); 3099 3100 return nfserr; 3101 } 3102 3103 3104 static __be32 3105 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 3106 { 3107 struct xdr_stream *xdr = &resp->xdr; 3108 __be32 *p; 3109 3110 if (!nfserr) { 3111 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3112 if (!p) 3113 return nfserr_resource; 3114 p = xdr_encode_opaque_fixed(p, commit->co_verf.data, 3115 NFS4_VERIFIER_SIZE); 3116 } 3117 return nfserr; 3118 } 3119 3120 static __be32 3121 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 3122 { 3123 struct xdr_stream *xdr = &resp->xdr; 3124 __be32 *p; 3125 3126 if (!nfserr) { 3127 p = xdr_reserve_space(xdr, 20); 3128 if (!p) 3129 return nfserr_resource; 3130 encode_cinfo(p, &create->cr_cinfo); 3131 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0], 3132 create->cr_bmval[1], create->cr_bmval[2]); 3133 } 3134 return nfserr; 3135 } 3136 3137 static __be32 3138 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 3139 { 3140 struct svc_fh *fhp = getattr->ga_fhp; 3141 struct xdr_stream *xdr = &resp->xdr; 3142 3143 if (nfserr) 3144 return nfserr; 3145 3146 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, 3147 getattr->ga_bmval, 3148 resp->rqstp, 0); 3149 return nfserr; 3150 } 3151 3152 static __be32 3153 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 3154 { 3155 struct xdr_stream *xdr = &resp->xdr; 3156 struct svc_fh *fhp = *fhpp; 3157 unsigned int len; 3158 __be32 *p; 3159 3160 if (!nfserr) { 3161 len = fhp->fh_handle.fh_size; 3162 p = xdr_reserve_space(xdr, len + 4); 3163 if (!p) 3164 return nfserr_resource; 3165 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); 3166 } 3167 return nfserr; 3168 } 3169 3170 /* 3171 * Including all fields other than the name, a LOCK4denied structure requires 3172 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 3173 */ 3174 static __be32 3175 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) 3176 { 3177 struct xdr_netobj *conf = &ld->ld_owner; 3178 __be32 *p; 3179 3180 again: 3181 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); 3182 if (!p) { 3183 /* 3184 * Don't fail to return the result just because we can't 3185 * return the conflicting open: 3186 */ 3187 if (conf->len) { 3188 kfree(conf->data); 3189 conf->len = 0; 3190 conf->data = NULL; 3191 goto again; 3192 } 3193 return nfserr_resource; 3194 } 3195 p = xdr_encode_hyper(p, ld->ld_start); 3196 p = xdr_encode_hyper(p, ld->ld_length); 3197 *p++ = cpu_to_be32(ld->ld_type); 3198 if (conf->len) { 3199 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); 3200 p = xdr_encode_opaque(p, conf->data, conf->len); 3201 kfree(conf->data); 3202 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 3203 p = xdr_encode_hyper(p, (u64)0); /* clientid */ 3204 *p++ = cpu_to_be32(0); /* length of owner name */ 3205 } 3206 return nfserr_denied; 3207 } 3208 3209 static __be32 3210 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 3211 { 3212 struct xdr_stream *xdr = &resp->xdr; 3213 3214 if (!nfserr) 3215 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); 3216 else if (nfserr == nfserr_denied) 3217 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); 3218 3219 return nfserr; 3220 } 3221 3222 static __be32 3223 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 3224 { 3225 struct xdr_stream *xdr = &resp->xdr; 3226 3227 if (nfserr == nfserr_denied) 3228 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); 3229 return nfserr; 3230 } 3231 3232 static __be32 3233 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 3234 { 3235 struct xdr_stream *xdr = &resp->xdr; 3236 3237 if (!nfserr) 3238 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); 3239 3240 return nfserr; 3241 } 3242 3243 3244 static __be32 3245 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 3246 { 3247 struct xdr_stream *xdr = &resp->xdr; 3248 __be32 *p; 3249 3250 if (!nfserr) { 3251 p = xdr_reserve_space(xdr, 20); 3252 if (!p) 3253 return nfserr_resource; 3254 p = encode_cinfo(p, &link->li_cinfo); 3255 } 3256 return nfserr; 3257 } 3258 3259 3260 static __be32 3261 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 3262 { 3263 struct xdr_stream *xdr = &resp->xdr; 3264 __be32 *p; 3265 3266 if (nfserr) 3267 goto out; 3268 3269 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); 3270 if (nfserr) 3271 goto out; 3272 p = xdr_reserve_space(xdr, 24); 3273 if (!p) 3274 return nfserr_resource; 3275 p = encode_cinfo(p, &open->op_cinfo); 3276 *p++ = cpu_to_be32(open->op_rflags); 3277 3278 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], 3279 open->op_bmval[2]); 3280 if (nfserr) 3281 goto out; 3282 3283 p = xdr_reserve_space(xdr, 4); 3284 if (!p) 3285 return nfserr_resource; 3286 3287 *p++ = cpu_to_be32(open->op_delegate_type); 3288 switch (open->op_delegate_type) { 3289 case NFS4_OPEN_DELEGATE_NONE: 3290 break; 3291 case NFS4_OPEN_DELEGATE_READ: 3292 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3293 if (nfserr) 3294 return nfserr; 3295 p = xdr_reserve_space(xdr, 20); 3296 if (!p) 3297 return nfserr_resource; 3298 *p++ = cpu_to_be32(open->op_recall); 3299 3300 /* 3301 * TODO: ACE's in delegations 3302 */ 3303 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3304 *p++ = cpu_to_be32(0); 3305 *p++ = cpu_to_be32(0); 3306 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3307 break; 3308 case NFS4_OPEN_DELEGATE_WRITE: 3309 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); 3310 if (nfserr) 3311 return nfserr; 3312 p = xdr_reserve_space(xdr, 32); 3313 if (!p) 3314 return nfserr_resource; 3315 *p++ = cpu_to_be32(0); 3316 3317 /* 3318 * TODO: space_limit's in delegations 3319 */ 3320 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); 3321 *p++ = cpu_to_be32(~(u32)0); 3322 *p++ = cpu_to_be32(~(u32)0); 3323 3324 /* 3325 * TODO: ACE's in delegations 3326 */ 3327 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 3328 *p++ = cpu_to_be32(0); 3329 *p++ = cpu_to_be32(0); 3330 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ 3331 break; 3332 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 3333 switch (open->op_why_no_deleg) { 3334 case WND4_CONTENTION: 3335 case WND4_RESOURCE: 3336 p = xdr_reserve_space(xdr, 8); 3337 if (!p) 3338 return nfserr_resource; 3339 *p++ = cpu_to_be32(open->op_why_no_deleg); 3340 /* deleg signaling not supported yet: */ 3341 *p++ = cpu_to_be32(0); 3342 break; 3343 default: 3344 p = xdr_reserve_space(xdr, 4); 3345 if (!p) 3346 return nfserr_resource; 3347 *p++ = cpu_to_be32(open->op_why_no_deleg); 3348 } 3349 break; 3350 default: 3351 BUG(); 3352 } 3353 /* XXX save filehandle here */ 3354 out: 3355 return nfserr; 3356 } 3357 3358 static __be32 3359 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 3360 { 3361 struct xdr_stream *xdr = &resp->xdr; 3362 3363 if (!nfserr) 3364 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); 3365 3366 return nfserr; 3367 } 3368 3369 static __be32 3370 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 3371 { 3372 struct xdr_stream *xdr = &resp->xdr; 3373 3374 if (!nfserr) 3375 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); 3376 3377 return nfserr; 3378 } 3379 3380 static __be32 nfsd4_encode_splice_read( 3381 struct nfsd4_compoundres *resp, 3382 struct nfsd4_read *read, 3383 struct file *file, unsigned long maxcount) 3384 { 3385 struct xdr_stream *xdr = &resp->xdr; 3386 struct xdr_buf *buf = xdr->buf; 3387 u32 eof; 3388 long len; 3389 int space_left; 3390 __be32 nfserr; 3391 __be32 *p = xdr->p - 2; 3392 3393 /* Make sure there will be room for padding if needed */ 3394 if (xdr->end - xdr->p < 1) 3395 return nfserr_resource; 3396 3397 len = maxcount; 3398 nfserr = nfsd_splice_read(read->rd_rqstp, file, 3399 read->rd_offset, &maxcount); 3400 if (nfserr) { 3401 /* 3402 * nfsd_splice_actor may have already messed with the 3403 * page length; reset it so as not to confuse 3404 * xdr_truncate_encode: 3405 */ 3406 buf->page_len = 0; 3407 return nfserr; 3408 } 3409 3410 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3411 d_inode(read->rd_fhp->fh_dentry)->i_size); 3412 3413 *(p++) = htonl(eof); 3414 *(p++) = htonl(maxcount); 3415 3416 buf->page_len = maxcount; 3417 buf->len += maxcount; 3418 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) 3419 / PAGE_SIZE; 3420 3421 /* Use rest of head for padding and remaining ops: */ 3422 buf->tail[0].iov_base = xdr->p; 3423 buf->tail[0].iov_len = 0; 3424 xdr->iov = buf->tail; 3425 if (maxcount&3) { 3426 int pad = 4 - (maxcount&3); 3427 3428 *(xdr->p++) = 0; 3429 3430 buf->tail[0].iov_base += maxcount&3; 3431 buf->tail[0].iov_len = pad; 3432 buf->len += pad; 3433 } 3434 3435 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, 3436 buf->buflen - buf->len); 3437 buf->buflen = buf->len + space_left; 3438 xdr->end = (__be32 *)((void *)xdr->end + space_left); 3439 3440 return 0; 3441 } 3442 3443 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, 3444 struct nfsd4_read *read, 3445 struct file *file, unsigned long maxcount) 3446 { 3447 struct xdr_stream *xdr = &resp->xdr; 3448 u32 eof; 3449 int v; 3450 int starting_len = xdr->buf->len - 8; 3451 long len; 3452 int thislen; 3453 __be32 nfserr; 3454 __be32 tmp; 3455 __be32 *p; 3456 u32 zzz = 0; 3457 int pad; 3458 3459 len = maxcount; 3460 v = 0; 3461 3462 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); 3463 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3464 WARN_ON_ONCE(!p); 3465 resp->rqstp->rq_vec[v].iov_base = p; 3466 resp->rqstp->rq_vec[v].iov_len = thislen; 3467 v++; 3468 len -= thislen; 3469 3470 while (len) { 3471 thislen = min_t(long, len, PAGE_SIZE); 3472 p = xdr_reserve_space(xdr, (thislen+3)&~3); 3473 WARN_ON_ONCE(!p); 3474 resp->rqstp->rq_vec[v].iov_base = p; 3475 resp->rqstp->rq_vec[v].iov_len = thislen; 3476 v++; 3477 len -= thislen; 3478 } 3479 read->rd_vlen = v; 3480 3481 len = maxcount; 3482 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, 3483 read->rd_vlen, &maxcount); 3484 if (nfserr) 3485 return nfserr; 3486 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); 3487 3488 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, 3489 d_inode(read->rd_fhp->fh_dentry)->i_size); 3490 3491 tmp = htonl(eof); 3492 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); 3493 tmp = htonl(maxcount); 3494 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); 3495 3496 pad = (maxcount&3) ? 4 - (maxcount&3) : 0; 3497 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, 3498 &zzz, pad); 3499 return 0; 3500 3501 } 3502 3503 static __be32 3504 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 3505 struct nfsd4_read *read) 3506 { 3507 unsigned long maxcount; 3508 struct xdr_stream *xdr = &resp->xdr; 3509 struct file *file = read->rd_filp; 3510 int starting_len = xdr->buf->len; 3511 struct raparms *ra = NULL; 3512 __be32 *p; 3513 3514 if (nfserr) 3515 goto out; 3516 3517 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ 3518 if (!p) { 3519 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); 3520 nfserr = nfserr_resource; 3521 goto out; 3522 } 3523 if (resp->xdr.buf->page_len && 3524 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { 3525 WARN_ON_ONCE(1); 3526 nfserr = nfserr_resource; 3527 goto out; 3528 } 3529 xdr_commit_encode(xdr); 3530 3531 maxcount = svc_max_payload(resp->rqstp); 3532 maxcount = min_t(unsigned long, maxcount, 3533 (xdr->buf->buflen - xdr->buf->len)); 3534 maxcount = min_t(unsigned long, maxcount, read->rd_length); 3535 3536 if (read->rd_tmp_file) 3537 ra = nfsd_init_raparms(file); 3538 3539 if (file->f_op->splice_read && 3540 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) 3541 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); 3542 else 3543 nfserr = nfsd4_encode_readv(resp, read, file, maxcount); 3544 3545 if (ra) 3546 nfsd_put_raparams(file, ra); 3547 3548 if (nfserr) 3549 xdr_truncate_encode(xdr, starting_len); 3550 3551 out: 3552 if (file) 3553 fput(file); 3554 return nfserr; 3555 } 3556 3557 static __be32 3558 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 3559 { 3560 int maxcount; 3561 __be32 wire_count; 3562 int zero = 0; 3563 struct xdr_stream *xdr = &resp->xdr; 3564 int length_offset = xdr->buf->len; 3565 __be32 *p; 3566 3567 if (nfserr) 3568 return nfserr; 3569 3570 p = xdr_reserve_space(xdr, 4); 3571 if (!p) 3572 return nfserr_resource; 3573 maxcount = PAGE_SIZE; 3574 3575 p = xdr_reserve_space(xdr, maxcount); 3576 if (!p) 3577 return nfserr_resource; 3578 /* 3579 * XXX: By default, the ->readlink() VFS op will truncate symlinks 3580 * if they would overflow the buffer. Is this kosher in NFSv4? If 3581 * not, one easy fix is: if ->readlink() precisely fills the buffer, 3582 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 3583 */ 3584 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, 3585 (char *)p, &maxcount); 3586 if (nfserr == nfserr_isdir) 3587 nfserr = nfserr_inval; 3588 if (nfserr) { 3589 xdr_truncate_encode(xdr, length_offset); 3590 return nfserr; 3591 } 3592 3593 wire_count = htonl(maxcount); 3594 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); 3595 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); 3596 if (maxcount & 3) 3597 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, 3598 &zero, 4 - (maxcount&3)); 3599 return 0; 3600 } 3601 3602 static __be32 3603 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3604 { 3605 int maxcount; 3606 int bytes_left; 3607 loff_t offset; 3608 __be64 wire_offset; 3609 struct xdr_stream *xdr = &resp->xdr; 3610 int starting_len = xdr->buf->len; 3611 __be32 *p; 3612 3613 if (nfserr) 3614 return nfserr; 3615 3616 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); 3617 if (!p) 3618 return nfserr_resource; 3619 3620 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3621 *p++ = cpu_to_be32(0); 3622 *p++ = cpu_to_be32(0); 3623 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) 3624 - (char *)resp->xdr.buf->head[0].iov_base; 3625 3626 /* 3627 * Number of bytes left for directory entries allowing for the 3628 * final 8 bytes of the readdir and a following failed op: 3629 */ 3630 bytes_left = xdr->buf->buflen - xdr->buf->len 3631 - COMPOUND_ERR_SLACK_SPACE - 8; 3632 if (bytes_left < 0) { 3633 nfserr = nfserr_resource; 3634 goto err_no_verf; 3635 } 3636 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); 3637 /* 3638 * Note the rfc defines rd_maxcount as the size of the 3639 * READDIR4resok structure, which includes the verifier above 3640 * and the 8 bytes encoded at the end of this function: 3641 */ 3642 if (maxcount < 16) { 3643 nfserr = nfserr_toosmall; 3644 goto err_no_verf; 3645 } 3646 maxcount = min_t(int, maxcount-16, bytes_left); 3647 3648 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ 3649 if (!readdir->rd_dircount) 3650 readdir->rd_dircount = INT_MAX; 3651 3652 readdir->xdr = xdr; 3653 readdir->rd_maxcount = maxcount; 3654 readdir->common.err = 0; 3655 readdir->cookie_offset = 0; 3656 3657 offset = readdir->rd_cookie; 3658 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3659 &offset, 3660 &readdir->common, nfsd4_encode_dirent); 3661 if (nfserr == nfs_ok && 3662 readdir->common.err == nfserr_toosmall && 3663 xdr->buf->len == starting_len + 8) { 3664 /* nothing encoded; which limit did we hit?: */ 3665 if (maxcount - 16 < bytes_left) 3666 /* It was the fault of rd_maxcount: */ 3667 nfserr = nfserr_toosmall; 3668 else 3669 /* We ran out of buffer space: */ 3670 nfserr = nfserr_resource; 3671 } 3672 if (nfserr) 3673 goto err_no_verf; 3674 3675 if (readdir->cookie_offset) { 3676 wire_offset = cpu_to_be64(offset); 3677 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, 3678 &wire_offset, 8); 3679 } 3680 3681 p = xdr_reserve_space(xdr, 8); 3682 if (!p) { 3683 WARN_ON_ONCE(1); 3684 goto err_no_verf; 3685 } 3686 *p++ = 0; /* no more entries */ 3687 *p++ = htonl(readdir->common.err == nfserr_eof); 3688 3689 return 0; 3690 err_no_verf: 3691 xdr_truncate_encode(xdr, starting_len); 3692 return nfserr; 3693 } 3694 3695 static __be32 3696 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3697 { 3698 struct xdr_stream *xdr = &resp->xdr; 3699 __be32 *p; 3700 3701 if (!nfserr) { 3702 p = xdr_reserve_space(xdr, 20); 3703 if (!p) 3704 return nfserr_resource; 3705 p = encode_cinfo(p, &remove->rm_cinfo); 3706 } 3707 return nfserr; 3708 } 3709 3710 static __be32 3711 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3712 { 3713 struct xdr_stream *xdr = &resp->xdr; 3714 __be32 *p; 3715 3716 if (!nfserr) { 3717 p = xdr_reserve_space(xdr, 40); 3718 if (!p) 3719 return nfserr_resource; 3720 p = encode_cinfo(p, &rename->rn_sinfo); 3721 p = encode_cinfo(p, &rename->rn_tinfo); 3722 } 3723 return nfserr; 3724 } 3725 3726 static __be32 3727 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, 3728 __be32 nfserr, struct svc_export *exp) 3729 { 3730 u32 i, nflavs, supported; 3731 struct exp_flavor_info *flavs; 3732 struct exp_flavor_info def_flavs[2]; 3733 __be32 *p, *flavorsp; 3734 static bool report = true; 3735 3736 if (nfserr) 3737 goto out; 3738 nfserr = nfserr_resource; 3739 if (exp->ex_nflavors) { 3740 flavs = exp->ex_flavors; 3741 nflavs = exp->ex_nflavors; 3742 } else { /* Handling of some defaults in absence of real secinfo: */ 3743 flavs = def_flavs; 3744 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3745 nflavs = 2; 3746 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3747 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3748 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3749 nflavs = 1; 3750 flavs[0].pseudoflavor 3751 = svcauth_gss_flavor(exp->ex_client); 3752 } else { 3753 nflavs = 1; 3754 flavs[0].pseudoflavor 3755 = exp->ex_client->flavour->flavour; 3756 } 3757 } 3758 3759 supported = 0; 3760 p = xdr_reserve_space(xdr, 4); 3761 if (!p) 3762 goto out; 3763 flavorsp = p++; /* to be backfilled later */ 3764 3765 for (i = 0; i < nflavs; i++) { 3766 rpc_authflavor_t pf = flavs[i].pseudoflavor; 3767 struct rpcsec_gss_info info; 3768 3769 if (rpcauth_get_gssinfo(pf, &info) == 0) { 3770 supported++; 3771 p = xdr_reserve_space(xdr, 4 + 4 + 3772 XDR_LEN(info.oid.len) + 4 + 4); 3773 if (!p) 3774 goto out; 3775 *p++ = cpu_to_be32(RPC_AUTH_GSS); 3776 p = xdr_encode_opaque(p, info.oid.data, info.oid.len); 3777 *p++ = cpu_to_be32(info.qop); 3778 *p++ = cpu_to_be32(info.service); 3779 } else if (pf < RPC_AUTH_MAXFLAVOR) { 3780 supported++; 3781 p = xdr_reserve_space(xdr, 4); 3782 if (!p) 3783 goto out; 3784 *p++ = cpu_to_be32(pf); 3785 } else { 3786 if (report) 3787 pr_warn("NFS: SECINFO: security flavor %u " 3788 "is not supported\n", pf); 3789 } 3790 } 3791 3792 if (nflavs != supported) 3793 report = false; 3794 *flavorsp = htonl(supported); 3795 nfserr = 0; 3796 out: 3797 if (exp) 3798 exp_put(exp); 3799 return nfserr; 3800 } 3801 3802 static __be32 3803 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3804 struct nfsd4_secinfo *secinfo) 3805 { 3806 struct xdr_stream *xdr = &resp->xdr; 3807 3808 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); 3809 } 3810 3811 static __be32 3812 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3813 struct nfsd4_secinfo_no_name *secinfo) 3814 { 3815 struct xdr_stream *xdr = &resp->xdr; 3816 3817 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); 3818 } 3819 3820 /* 3821 * The SETATTR encode routine is special -- it always encodes a bitmap, 3822 * regardless of the error status. 3823 */ 3824 static __be32 3825 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3826 { 3827 struct xdr_stream *xdr = &resp->xdr; 3828 __be32 *p; 3829 3830 p = xdr_reserve_space(xdr, 16); 3831 if (!p) 3832 return nfserr_resource; 3833 if (nfserr) { 3834 *p++ = cpu_to_be32(3); 3835 *p++ = cpu_to_be32(0); 3836 *p++ = cpu_to_be32(0); 3837 *p++ = cpu_to_be32(0); 3838 } 3839 else { 3840 *p++ = cpu_to_be32(3); 3841 *p++ = cpu_to_be32(setattr->sa_bmval[0]); 3842 *p++ = cpu_to_be32(setattr->sa_bmval[1]); 3843 *p++ = cpu_to_be32(setattr->sa_bmval[2]); 3844 } 3845 return nfserr; 3846 } 3847 3848 static __be32 3849 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3850 { 3851 struct xdr_stream *xdr = &resp->xdr; 3852 __be32 *p; 3853 3854 if (!nfserr) { 3855 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); 3856 if (!p) 3857 return nfserr_resource; 3858 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); 3859 p = xdr_encode_opaque_fixed(p, &scd->se_confirm, 3860 NFS4_VERIFIER_SIZE); 3861 } 3862 else if (nfserr == nfserr_clid_inuse) { 3863 p = xdr_reserve_space(xdr, 8); 3864 if (!p) 3865 return nfserr_resource; 3866 *p++ = cpu_to_be32(0); 3867 *p++ = cpu_to_be32(0); 3868 } 3869 return nfserr; 3870 } 3871 3872 static __be32 3873 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3874 { 3875 struct xdr_stream *xdr = &resp->xdr; 3876 __be32 *p; 3877 3878 if (!nfserr) { 3879 p = xdr_reserve_space(xdr, 16); 3880 if (!p) 3881 return nfserr_resource; 3882 *p++ = cpu_to_be32(write->wr_bytes_written); 3883 *p++ = cpu_to_be32(write->wr_how_written); 3884 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 3885 NFS4_VERIFIER_SIZE); 3886 } 3887 return nfserr; 3888 } 3889 3890 static __be32 3891 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3892 struct nfsd4_exchange_id *exid) 3893 { 3894 struct xdr_stream *xdr = &resp->xdr; 3895 __be32 *p; 3896 char *major_id; 3897 char *server_scope; 3898 int major_id_sz; 3899 int server_scope_sz; 3900 int status = 0; 3901 uint64_t minor_id = 0; 3902 3903 if (nfserr) 3904 return nfserr; 3905 3906 major_id = utsname()->nodename; 3907 major_id_sz = strlen(major_id); 3908 server_scope = utsname()->nodename; 3909 server_scope_sz = strlen(server_scope); 3910 3911 p = xdr_reserve_space(xdr, 3912 8 /* eir_clientid */ + 3913 4 /* eir_sequenceid */ + 3914 4 /* eir_flags */ + 3915 4 /* spr_how */); 3916 if (!p) 3917 return nfserr_resource; 3918 3919 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); 3920 *p++ = cpu_to_be32(exid->seqid); 3921 *p++ = cpu_to_be32(exid->flags); 3922 3923 *p++ = cpu_to_be32(exid->spa_how); 3924 3925 switch (exid->spa_how) { 3926 case SP4_NONE: 3927 break; 3928 case SP4_MACH_CRED: 3929 /* spo_must_enforce bitmap: */ 3930 status = nfsd4_encode_bitmap(xdr, 3931 exid->spo_must_enforce[0], 3932 exid->spo_must_enforce[1], 3933 exid->spo_must_enforce[2]); 3934 if (status) 3935 goto out; 3936 /* spo_must_allow bitmap: */ 3937 status = nfsd4_encode_bitmap(xdr, 3938 exid->spo_must_allow[0], 3939 exid->spo_must_allow[1], 3940 exid->spo_must_allow[2]); 3941 if (status) 3942 goto out; 3943 break; 3944 default: 3945 WARN_ON_ONCE(1); 3946 } 3947 3948 p = xdr_reserve_space(xdr, 3949 8 /* so_minor_id */ + 3950 4 /* so_major_id.len */ + 3951 (XDR_QUADLEN(major_id_sz) * 4) + 3952 4 /* eir_server_scope.len */ + 3953 (XDR_QUADLEN(server_scope_sz) * 4) + 3954 4 /* eir_server_impl_id.count (0) */); 3955 if (!p) 3956 return nfserr_resource; 3957 3958 /* The server_owner struct */ 3959 p = xdr_encode_hyper(p, minor_id); /* Minor id */ 3960 /* major id */ 3961 p = xdr_encode_opaque(p, major_id, major_id_sz); 3962 3963 /* Server scope */ 3964 p = xdr_encode_opaque(p, server_scope, server_scope_sz); 3965 3966 /* Implementation id */ 3967 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ 3968 return 0; 3969 out: 3970 return status; 3971 } 3972 3973 static __be32 3974 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3975 struct nfsd4_create_session *sess) 3976 { 3977 struct xdr_stream *xdr = &resp->xdr; 3978 __be32 *p; 3979 3980 if (nfserr) 3981 return nfserr; 3982 3983 p = xdr_reserve_space(xdr, 24); 3984 if (!p) 3985 return nfserr_resource; 3986 p = xdr_encode_opaque_fixed(p, sess->sessionid.data, 3987 NFS4_MAX_SESSIONID_LEN); 3988 *p++ = cpu_to_be32(sess->seqid); 3989 *p++ = cpu_to_be32(sess->flags); 3990 3991 p = xdr_reserve_space(xdr, 28); 3992 if (!p) 3993 return nfserr_resource; 3994 *p++ = cpu_to_be32(0); /* headerpadsz */ 3995 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); 3996 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); 3997 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); 3998 *p++ = cpu_to_be32(sess->fore_channel.maxops); 3999 *p++ = cpu_to_be32(sess->fore_channel.maxreqs); 4000 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); 4001 4002 if (sess->fore_channel.nr_rdma_attrs) { 4003 p = xdr_reserve_space(xdr, 4); 4004 if (!p) 4005 return nfserr_resource; 4006 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); 4007 } 4008 4009 p = xdr_reserve_space(xdr, 28); 4010 if (!p) 4011 return nfserr_resource; 4012 *p++ = cpu_to_be32(0); /* headerpadsz */ 4013 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); 4014 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); 4015 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); 4016 *p++ = cpu_to_be32(sess->back_channel.maxops); 4017 *p++ = cpu_to_be32(sess->back_channel.maxreqs); 4018 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); 4019 4020 if (sess->back_channel.nr_rdma_attrs) { 4021 p = xdr_reserve_space(xdr, 4); 4022 if (!p) 4023 return nfserr_resource; 4024 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); 4025 } 4026 return 0; 4027 } 4028 4029 static __be32 4030 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 4031 struct nfsd4_sequence *seq) 4032 { 4033 struct xdr_stream *xdr = &resp->xdr; 4034 __be32 *p; 4035 4036 if (nfserr) 4037 return nfserr; 4038 4039 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); 4040 if (!p) 4041 return nfserr_resource; 4042 p = xdr_encode_opaque_fixed(p, seq->sessionid.data, 4043 NFS4_MAX_SESSIONID_LEN); 4044 *p++ = cpu_to_be32(seq->seqid); 4045 *p++ = cpu_to_be32(seq->slotid); 4046 /* Note slotid's are numbered from zero: */ 4047 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ 4048 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ 4049 *p++ = cpu_to_be32(seq->status_flags); 4050 4051 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ 4052 return 0; 4053 } 4054 4055 static __be32 4056 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 4057 struct nfsd4_test_stateid *test_stateid) 4058 { 4059 struct xdr_stream *xdr = &resp->xdr; 4060 struct nfsd4_test_stateid_id *stateid, *next; 4061 __be32 *p; 4062 4063 if (nfserr) 4064 return nfserr; 4065 4066 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); 4067 if (!p) 4068 return nfserr_resource; 4069 *p++ = htonl(test_stateid->ts_num_ids); 4070 4071 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 4072 *p++ = stateid->ts_id_status; 4073 } 4074 4075 return nfserr; 4076 } 4077 4078 #ifdef CONFIG_NFSD_PNFS 4079 static __be32 4080 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 4081 struct nfsd4_getdeviceinfo *gdev) 4082 { 4083 struct xdr_stream *xdr = &resp->xdr; 4084 const struct nfsd4_layout_ops *ops = 4085 nfsd4_layout_ops[gdev->gd_layout_type]; 4086 u32 starting_len = xdr->buf->len, needed_len; 4087 __be32 *p; 4088 4089 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr)); 4090 if (nfserr) 4091 goto out; 4092 4093 nfserr = nfserr_resource; 4094 p = xdr_reserve_space(xdr, 4); 4095 if (!p) 4096 goto out; 4097 4098 *p++ = cpu_to_be32(gdev->gd_layout_type); 4099 4100 /* If maxcount is 0 then just update notifications */ 4101 if (gdev->gd_maxcount != 0) { 4102 nfserr = ops->encode_getdeviceinfo(xdr, gdev); 4103 if (nfserr) { 4104 /* 4105 * We don't bother to burden the layout drivers with 4106 * enforcing gd_maxcount, just tell the client to 4107 * come back with a bigger buffer if it's not enough. 4108 */ 4109 if (xdr->buf->len + 4 > gdev->gd_maxcount) 4110 goto toosmall; 4111 goto out; 4112 } 4113 } 4114 4115 nfserr = nfserr_resource; 4116 if (gdev->gd_notify_types) { 4117 p = xdr_reserve_space(xdr, 4 + 4); 4118 if (!p) 4119 goto out; 4120 *p++ = cpu_to_be32(1); /* bitmap length */ 4121 *p++ = cpu_to_be32(gdev->gd_notify_types); 4122 } else { 4123 p = xdr_reserve_space(xdr, 4); 4124 if (!p) 4125 goto out; 4126 *p++ = 0; 4127 } 4128 4129 nfserr = 0; 4130 out: 4131 kfree(gdev->gd_device); 4132 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr)); 4133 return nfserr; 4134 4135 toosmall: 4136 dprintk("%s: maxcount too small\n", __func__); 4137 needed_len = xdr->buf->len + 4 /* notifications */; 4138 xdr_truncate_encode(xdr, starting_len); 4139 p = xdr_reserve_space(xdr, 4); 4140 if (!p) { 4141 nfserr = nfserr_resource; 4142 } else { 4143 *p++ = cpu_to_be32(needed_len); 4144 nfserr = nfserr_toosmall; 4145 } 4146 goto out; 4147 } 4148 4149 static __be32 4150 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, 4151 struct nfsd4_layoutget *lgp) 4152 { 4153 struct xdr_stream *xdr = &resp->xdr; 4154 const struct nfsd4_layout_ops *ops = 4155 nfsd4_layout_ops[lgp->lg_layout_type]; 4156 __be32 *p; 4157 4158 dprintk("%s: err %d\n", __func__, nfserr); 4159 if (nfserr) 4160 goto out; 4161 4162 nfserr = nfserr_resource; 4163 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); 4164 if (!p) 4165 goto out; 4166 4167 *p++ = cpu_to_be32(1); /* we always set return-on-close */ 4168 *p++ = cpu_to_be32(lgp->lg_sid.si_generation); 4169 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, 4170 sizeof(stateid_opaque_t)); 4171 4172 *p++ = cpu_to_be32(1); /* we always return a single layout */ 4173 p = xdr_encode_hyper(p, lgp->lg_seg.offset); 4174 p = xdr_encode_hyper(p, lgp->lg_seg.length); 4175 *p++ = cpu_to_be32(lgp->lg_seg.iomode); 4176 *p++ = cpu_to_be32(lgp->lg_layout_type); 4177 4178 nfserr = ops->encode_layoutget(xdr, lgp); 4179 out: 4180 kfree(lgp->lg_content); 4181 return nfserr; 4182 } 4183 4184 static __be32 4185 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, 4186 struct nfsd4_layoutcommit *lcp) 4187 { 4188 struct xdr_stream *xdr = &resp->xdr; 4189 __be32 *p; 4190 4191 if (nfserr) 4192 return nfserr; 4193 4194 p = xdr_reserve_space(xdr, 4); 4195 if (!p) 4196 return nfserr_resource; 4197 *p++ = cpu_to_be32(lcp->lc_size_chg); 4198 if (lcp->lc_size_chg) { 4199 p = xdr_reserve_space(xdr, 8); 4200 if (!p) 4201 return nfserr_resource; 4202 p = xdr_encode_hyper(p, lcp->lc_newsize); 4203 } 4204 4205 return nfs_ok; 4206 } 4207 4208 static __be32 4209 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, 4210 struct nfsd4_layoutreturn *lrp) 4211 { 4212 struct xdr_stream *xdr = &resp->xdr; 4213 __be32 *p; 4214 4215 if (nfserr) 4216 return nfserr; 4217 4218 p = xdr_reserve_space(xdr, 4); 4219 if (!p) 4220 return nfserr_resource; 4221 *p++ = cpu_to_be32(lrp->lrs_present); 4222 if (lrp->lrs_present) 4223 return nfsd4_encode_stateid(xdr, &lrp->lr_sid); 4224 return nfs_ok; 4225 } 4226 #endif /* CONFIG_NFSD_PNFS */ 4227 4228 static __be32 4229 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write) 4230 { 4231 __be32 *p; 4232 4233 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); 4234 if (!p) 4235 return nfserr_resource; 4236 4237 *p++ = cpu_to_be32(0); 4238 p = xdr_encode_hyper(p, write->wr_bytes_written); 4239 *p++ = cpu_to_be32(write->wr_stable_how); 4240 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, 4241 NFS4_VERIFIER_SIZE); 4242 return nfs_ok; 4243 } 4244 4245 static __be32 4246 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, 4247 struct nfsd4_copy *copy) 4248 { 4249 __be32 *p; 4250 4251 if (!nfserr) { 4252 nfserr = nfsd42_encode_write_res(resp, ©->cp_res); 4253 if (nfserr) 4254 return nfserr; 4255 4256 p = xdr_reserve_space(&resp->xdr, 4 + 4); 4257 *p++ = cpu_to_be32(copy->cp_consecutive); 4258 *p++ = cpu_to_be32(copy->cp_synchronous); 4259 } 4260 return nfserr; 4261 } 4262 4263 static __be32 4264 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, 4265 struct nfsd4_seek *seek) 4266 { 4267 __be32 *p; 4268 4269 if (nfserr) 4270 return nfserr; 4271 4272 p = xdr_reserve_space(&resp->xdr, 4 + 8); 4273 *p++ = cpu_to_be32(seek->seek_eof); 4274 p = xdr_encode_hyper(p, seek->seek_pos); 4275 4276 return nfserr; 4277 } 4278 4279 static __be32 4280 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 4281 { 4282 return nfserr; 4283 } 4284 4285 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 4286 4287 /* 4288 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 4289 * since we don't need to filter out obsolete ops as this is 4290 * done in the decoding phase. 4291 */ 4292 static nfsd4_enc nfsd4_enc_ops[] = { 4293 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 4294 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 4295 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 4296 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 4297 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 4298 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4299 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 4300 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 4301 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 4302 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 4303 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 4304 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 4305 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 4306 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 4307 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4308 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 4309 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 4310 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 4311 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 4312 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 4313 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 4314 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 4315 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 4316 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 4317 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 4318 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 4319 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 4320 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 4321 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 4322 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 4323 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 4324 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 4325 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 4326 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 4327 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 4328 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 4329 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 4330 4331 /* NFSv4.1 operations */ 4332 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 4333 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 4334 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 4335 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 4336 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 4337 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 4338 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4339 #ifdef CONFIG_NFSD_PNFS 4340 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, 4341 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4342 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, 4343 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, 4344 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, 4345 #else 4346 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 4347 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 4348 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 4349 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 4350 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 4351 #endif 4352 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 4353 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 4354 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 4355 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 4356 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 4357 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 4358 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 4359 4360 /* NFSv4.2 operations */ 4361 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4362 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, 4363 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, 4364 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, 4365 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, 4366 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, 4367 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, 4368 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, 4369 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, 4370 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, 4371 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, 4372 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, 4373 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, 4374 }; 4375 4376 /* 4377 * Calculate whether we still have space to encode repsize bytes. 4378 * There are two considerations: 4379 * - For NFS versions >=4.1, the size of the reply must stay within 4380 * session limits 4381 * - For all NFS versions, we must stay within limited preallocated 4382 * buffer space. 4383 * 4384 * This is called before the operation is processed, so can only provide 4385 * an upper estimate. For some nonidempotent operations (such as 4386 * getattr), it's not necessarily a problem if that estimate is wrong, 4387 * as we can fail it after processing without significant side effects. 4388 */ 4389 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) 4390 { 4391 struct xdr_buf *buf = &resp->rqstp->rq_res; 4392 struct nfsd4_slot *slot = resp->cstate.slot; 4393 4394 if (buf->len + respsize <= buf->buflen) 4395 return nfs_ok; 4396 if (!nfsd4_has_session(&resp->cstate)) 4397 return nfserr_resource; 4398 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { 4399 WARN_ON_ONCE(1); 4400 return nfserr_rep_too_big_to_cache; 4401 } 4402 return nfserr_rep_too_big; 4403 } 4404 4405 void 4406 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 4407 { 4408 struct xdr_stream *xdr = &resp->xdr; 4409 struct nfs4_stateowner *so = resp->cstate.replay_owner; 4410 struct svc_rqst *rqstp = resp->rqstp; 4411 int post_err_offset; 4412 nfsd4_enc encoder; 4413 __be32 *p; 4414 4415 p = xdr_reserve_space(xdr, 8); 4416 if (!p) { 4417 WARN_ON_ONCE(1); 4418 return; 4419 } 4420 *p++ = cpu_to_be32(op->opnum); 4421 post_err_offset = xdr->buf->len; 4422 4423 if (op->opnum == OP_ILLEGAL) 4424 goto status; 4425 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 4426 !nfsd4_enc_ops[op->opnum]); 4427 encoder = nfsd4_enc_ops[op->opnum]; 4428 op->status = encoder(resp, op->status, &op->u); 4429 xdr_commit_encode(xdr); 4430 4431 /* nfsd4_check_resp_size guarantees enough room for error status */ 4432 if (!op->status) { 4433 int space_needed = 0; 4434 if (!nfsd4_last_compound_op(rqstp)) 4435 space_needed = COMPOUND_ERR_SLACK_SPACE; 4436 op->status = nfsd4_check_resp_size(resp, space_needed); 4437 } 4438 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { 4439 struct nfsd4_slot *slot = resp->cstate.slot; 4440 4441 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) 4442 op->status = nfserr_rep_too_big_to_cache; 4443 else 4444 op->status = nfserr_rep_too_big; 4445 } 4446 if (op->status == nfserr_resource || 4447 op->status == nfserr_rep_too_big || 4448 op->status == nfserr_rep_too_big_to_cache) { 4449 /* 4450 * The operation may have already been encoded or 4451 * partially encoded. No op returns anything additional 4452 * in the case of one of these three errors, so we can 4453 * just truncate back to after the status. But it's a 4454 * bug if we had to do this on a non-idempotent op: 4455 */ 4456 warn_on_nonidempotent_op(op); 4457 xdr_truncate_encode(xdr, post_err_offset); 4458 } 4459 if (so) { 4460 int len = xdr->buf->len - post_err_offset; 4461 4462 so->so_replay.rp_status = op->status; 4463 so->so_replay.rp_buflen = len; 4464 read_bytes_from_xdr_buf(xdr->buf, post_err_offset, 4465 so->so_replay.rp_buf, len); 4466 } 4467 status: 4468 /* Note that op->status is already in network byte order: */ 4469 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); 4470 } 4471 4472 /* 4473 * Encode the reply stored in the stateowner reply cache 4474 * 4475 * XDR note: do not encode rp->rp_buflen: the buffer contains the 4476 * previously sent already encoded operation. 4477 */ 4478 void 4479 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) 4480 { 4481 __be32 *p; 4482 struct nfs4_replay *rp = op->replay; 4483 4484 BUG_ON(!rp); 4485 4486 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); 4487 if (!p) { 4488 WARN_ON_ONCE(1); 4489 return; 4490 } 4491 *p++ = cpu_to_be32(op->opnum); 4492 *p++ = rp->rp_status; /* already xdr'ed */ 4493 4494 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); 4495 } 4496 4497 int 4498 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 4499 { 4500 return xdr_ressize_check(rqstp, p); 4501 } 4502 4503 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 4504 { 4505 struct svc_rqst *rqstp = rq; 4506 struct nfsd4_compoundargs *args = rqstp->rq_argp; 4507 4508 if (args->ops != args->iops) { 4509 kfree(args->ops); 4510 args->ops = args->iops; 4511 } 4512 kfree(args->tmpp); 4513 args->tmpp = NULL; 4514 while (args->to_free) { 4515 struct svcxdr_tmpbuf *tb = args->to_free; 4516 args->to_free = tb->next; 4517 kfree(tb); 4518 } 4519 return 1; 4520 } 4521 4522 int 4523 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 4524 { 4525 if (rqstp->rq_arg.head[0].iov_len % 4) { 4526 /* client is nuts */ 4527 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", 4528 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); 4529 return 0; 4530 } 4531 args->p = p; 4532 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 4533 args->pagelist = rqstp->rq_arg.pages; 4534 args->pagelen = rqstp->rq_arg.page_len; 4535 args->tmpp = NULL; 4536 args->to_free = NULL; 4537 args->ops = args->iops; 4538 args->rqstp = rqstp; 4539 4540 return !nfsd4_decode_compound(args); 4541 } 4542 4543 int 4544 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 4545 { 4546 /* 4547 * All that remains is to write the tag and operation count... 4548 */ 4549 struct xdr_buf *buf = resp->xdr.buf; 4550 4551 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + 4552 buf->tail[0].iov_len); 4553 4554 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 4555 4556 p = resp->tagp; 4557 *p++ = htonl(resp->taglen); 4558 memcpy(p, resp->tag, resp->taglen); 4559 p += XDR_QUADLEN(resp->taglen); 4560 *p++ = htonl(resp->opcnt); 4561 4562 nfsd4_sequence_done(resp); 4563 return 1; 4564 } 4565 4566 /* 4567 * Local variables: 4568 * c-basic-offset: 8 4569 * End: 4570 */ 4571