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 * TODO: Neil Brown made the following observation: We currently 36 * initially reserve NFSD_BUFSIZE space on the transmit queue and 37 * never release any of that until the request is complete. 38 * It would be good to calculate a new maximum response size while 39 * decoding the COMPOUND, and call svc_reserve with this number 40 * at the end of nfs4svc_decode_compoundargs. 41 */ 42 43 #include <linux/slab.h> 44 #include <linux/namei.h> 45 #include <linux/statfs.h> 46 #include <linux/utsname.h> 47 #include <linux/pagemap.h> 48 #include <linux/sunrpc/svcauth_gss.h> 49 50 #include "idmap.h" 51 #include "acl.h" 52 #include "xdr4.h" 53 #include "vfs.h" 54 #include "state.h" 55 #include "cache.h" 56 #include "netns.h" 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 READ32(x) (x) = ntohl(*p++) 97 #define READ64(x) do { \ 98 (x) = (u64)ntohl(*p++) << 32; \ 99 (x) |= ntohl(*p++); \ 100 } while (0) 101 #define READTIME(x) do { \ 102 p++; \ 103 (x) = ntohl(*p++); \ 104 p++; \ 105 } while (0) 106 #define READMEM(x,nbytes) do { \ 107 x = (char *)p; \ 108 p += XDR_QUADLEN(nbytes); \ 109 } while (0) 110 #define SAVEMEM(x,nbytes) do { \ 111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 112 savemem(argp, p, nbytes) : \ 113 (char *)p)) { \ 114 dprintk("NFSD: xdr error (%s:%d)\n", \ 115 __FILE__, __LINE__); \ 116 goto xdr_error; \ 117 } \ 118 p += XDR_QUADLEN(nbytes); \ 119 } while (0) 120 #define COPYMEM(x,nbytes) do { \ 121 memcpy((x), p, nbytes); \ 122 p += XDR_QUADLEN(nbytes); \ 123 } while (0) 124 125 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 126 #define READ_BUF(nbytes) do { \ 127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 128 p = argp->p; \ 129 argp->p += XDR_QUADLEN(nbytes); \ 130 } else if (!(p = read_buf(argp, nbytes))) { \ 131 dprintk("NFSD: xdr error (%s:%d)\n", \ 132 __FILE__, __LINE__); \ 133 goto xdr_error; \ 134 } \ 135 } while (0) 136 137 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 138 { 139 /* We want more bytes than seem to be available. 140 * Maybe we need a new page, maybe we have just run out 141 */ 142 unsigned int avail = (char *)argp->end - (char *)argp->p; 143 __be32 *p; 144 if (avail + argp->pagelen < nbytes) 145 return NULL; 146 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 147 return NULL; 148 /* ok, we can do it with the current plus the next page */ 149 if (nbytes <= sizeof(argp->tmp)) 150 p = argp->tmp; 151 else { 152 kfree(argp->tmpp); 153 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 154 if (!p) 155 return NULL; 156 157 } 158 /* 159 * The following memcpy is safe because read_buf is always 160 * called with nbytes > avail, and the two cases above both 161 * guarantee p points to at least nbytes bytes. 162 */ 163 memcpy(p, argp->p, avail); 164 /* step to next page */ 165 argp->p = page_address(argp->pagelist[0]); 166 argp->pagelist++; 167 if (argp->pagelen < PAGE_SIZE) { 168 argp->end = argp->p + (argp->pagelen>>2); 169 argp->pagelen = 0; 170 } else { 171 argp->end = argp->p + (PAGE_SIZE>>2); 172 argp->pagelen -= PAGE_SIZE; 173 } 174 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 175 argp->p += XDR_QUADLEN(nbytes - avail); 176 return p; 177 } 178 179 static int zero_clientid(clientid_t *clid) 180 { 181 return (clid->cl_boot == 0) && (clid->cl_id == 0); 182 } 183 184 static int 185 defer_free(struct nfsd4_compoundargs *argp, 186 void (*release)(const void *), void *p) 187 { 188 struct tmpbuf *tb; 189 190 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 191 if (!tb) 192 return -ENOMEM; 193 tb->buf = p; 194 tb->release = release; 195 tb->next = argp->to_free; 196 argp->to_free = tb; 197 return 0; 198 } 199 200 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 201 { 202 if (p == argp->tmp) { 203 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL); 204 if (!p) 205 return NULL; 206 } else { 207 BUG_ON(p != argp->tmpp); 208 argp->tmpp = NULL; 209 } 210 if (defer_free(argp, kfree, p)) { 211 kfree(p); 212 return NULL; 213 } else 214 return (char *)p; 215 } 216 217 static __be32 218 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 219 { 220 u32 bmlen; 221 DECODE_HEAD; 222 223 bmval[0] = 0; 224 bmval[1] = 0; 225 bmval[2] = 0; 226 227 READ_BUF(4); 228 READ32(bmlen); 229 if (bmlen > 1000) 230 goto xdr_error; 231 232 READ_BUF(bmlen << 2); 233 if (bmlen > 0) 234 READ32(bmval[0]); 235 if (bmlen > 1) 236 READ32(bmval[1]); 237 if (bmlen > 2) 238 READ32(bmval[2]); 239 240 DECODE_TAIL; 241 } 242 243 static __be32 244 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 245 struct iattr *iattr, struct nfs4_acl **acl) 246 { 247 int expected_len, len = 0; 248 u32 dummy32; 249 char *buf; 250 int host_err; 251 252 DECODE_HEAD; 253 iattr->ia_valid = 0; 254 if ((status = nfsd4_decode_bitmap(argp, bmval))) 255 return status; 256 257 READ_BUF(4); 258 READ32(expected_len); 259 260 if (bmval[0] & FATTR4_WORD0_SIZE) { 261 READ_BUF(8); 262 len += 8; 263 READ64(iattr->ia_size); 264 iattr->ia_valid |= ATTR_SIZE; 265 } 266 if (bmval[0] & FATTR4_WORD0_ACL) { 267 int nace; 268 struct nfs4_ace *ace; 269 270 READ_BUF(4); len += 4; 271 READ32(nace); 272 273 if (nace > NFS4_ACL_MAX) 274 return nfserr_resource; 275 276 *acl = nfs4_acl_new(nace); 277 if (*acl == NULL) { 278 host_err = -ENOMEM; 279 goto out_nfserr; 280 } 281 defer_free(argp, kfree, *acl); 282 283 (*acl)->naces = nace; 284 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 285 READ_BUF(16); len += 16; 286 READ32(ace->type); 287 READ32(ace->flag); 288 READ32(ace->access_mask); 289 READ32(dummy32); 290 READ_BUF(dummy32); 291 len += XDR_QUADLEN(dummy32) << 2; 292 READMEM(buf, dummy32); 293 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 294 status = nfs_ok; 295 if (ace->whotype != NFS4_ACL_WHO_NAMED) 296 ace->who = 0; 297 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 298 status = nfsd_map_name_to_gid(argp->rqstp, 299 buf, dummy32, &ace->who); 300 else 301 status = nfsd_map_name_to_uid(argp->rqstp, 302 buf, dummy32, &ace->who); 303 if (status) 304 return status; 305 } 306 } else 307 *acl = NULL; 308 if (bmval[1] & FATTR4_WORD1_MODE) { 309 READ_BUF(4); 310 len += 4; 311 READ32(iattr->ia_mode); 312 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 313 iattr->ia_valid |= ATTR_MODE; 314 } 315 if (bmval[1] & FATTR4_WORD1_OWNER) { 316 READ_BUF(4); 317 len += 4; 318 READ32(dummy32); 319 READ_BUF(dummy32); 320 len += (XDR_QUADLEN(dummy32) << 2); 321 READMEM(buf, dummy32); 322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 323 return status; 324 iattr->ia_valid |= ATTR_UID; 325 } 326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 327 READ_BUF(4); 328 len += 4; 329 READ32(dummy32); 330 READ_BUF(dummy32); 331 len += (XDR_QUADLEN(dummy32) << 2); 332 READMEM(buf, dummy32); 333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 334 return status; 335 iattr->ia_valid |= ATTR_GID; 336 } 337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 338 READ_BUF(4); 339 len += 4; 340 READ32(dummy32); 341 switch (dummy32) { 342 case NFS4_SET_TO_CLIENT_TIME: 343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 344 all 32 bits of 'nseconds'. */ 345 READ_BUF(12); 346 len += 12; 347 READ32(dummy32); 348 if (dummy32) 349 return nfserr_inval; 350 READ32(iattr->ia_atime.tv_sec); 351 READ32(iattr->ia_atime.tv_nsec); 352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 353 return nfserr_inval; 354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 355 break; 356 case NFS4_SET_TO_SERVER_TIME: 357 iattr->ia_valid |= ATTR_ATIME; 358 break; 359 default: 360 goto xdr_error; 361 } 362 } 363 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 364 READ_BUF(4); 365 len += 4; 366 READ32(dummy32); 367 switch (dummy32) { 368 case NFS4_SET_TO_CLIENT_TIME: 369 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 370 all 32 bits of 'nseconds'. */ 371 READ_BUF(12); 372 len += 12; 373 READ32(dummy32); 374 if (dummy32) 375 return nfserr_inval; 376 READ32(iattr->ia_mtime.tv_sec); 377 READ32(iattr->ia_mtime.tv_nsec); 378 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 379 return nfserr_inval; 380 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 381 break; 382 case NFS4_SET_TO_SERVER_TIME: 383 iattr->ia_valid |= ATTR_MTIME; 384 break; 385 default: 386 goto xdr_error; 387 } 388 } 389 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 390 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 391 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 392 READ_BUF(expected_len - len); 393 else if (len != expected_len) 394 goto xdr_error; 395 396 DECODE_TAIL; 397 398 out_nfserr: 399 status = nfserrno(host_err); 400 goto out; 401 } 402 403 static __be32 404 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 405 { 406 DECODE_HEAD; 407 408 READ_BUF(sizeof(stateid_t)); 409 READ32(sid->si_generation); 410 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 411 412 DECODE_TAIL; 413 } 414 415 static __be32 416 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 417 { 418 DECODE_HEAD; 419 420 READ_BUF(4); 421 READ32(access->ac_req_access); 422 423 DECODE_TAIL; 424 } 425 426 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) 427 { 428 DECODE_HEAD; 429 u32 dummy, uid, gid; 430 char *machine_name; 431 int i; 432 int nr_secflavs; 433 434 /* callback_sec_params4 */ 435 READ_BUF(4); 436 READ32(nr_secflavs); 437 cbs->flavor = (u32)(-1); 438 for (i = 0; i < nr_secflavs; ++i) { 439 READ_BUF(4); 440 READ32(dummy); 441 switch (dummy) { 442 case RPC_AUTH_NULL: 443 /* Nothing to read */ 444 if (cbs->flavor == (u32)(-1)) 445 cbs->flavor = RPC_AUTH_NULL; 446 break; 447 case RPC_AUTH_UNIX: 448 READ_BUF(8); 449 /* stamp */ 450 READ32(dummy); 451 452 /* machine name */ 453 READ32(dummy); 454 READ_BUF(dummy); 455 SAVEMEM(machine_name, dummy); 456 457 /* uid, gid */ 458 READ_BUF(8); 459 READ32(uid); 460 READ32(gid); 461 462 /* more gids */ 463 READ_BUF(4); 464 READ32(dummy); 465 READ_BUF(dummy * 4); 466 if (cbs->flavor == (u32)(-1)) { 467 cbs->uid = uid; 468 cbs->gid = gid; 469 cbs->flavor = RPC_AUTH_UNIX; 470 } 471 break; 472 case RPC_AUTH_GSS: 473 dprintk("RPC_AUTH_GSS callback secflavor " 474 "not supported!\n"); 475 READ_BUF(8); 476 /* gcbp_service */ 477 READ32(dummy); 478 /* gcbp_handle_from_server */ 479 READ32(dummy); 480 READ_BUF(dummy); 481 p += XDR_QUADLEN(dummy); 482 /* gcbp_handle_from_client */ 483 READ_BUF(4); 484 READ32(dummy); 485 READ_BUF(dummy); 486 break; 487 default: 488 dprintk("Illegal callback secflavor\n"); 489 return nfserr_inval; 490 } 491 } 492 DECODE_TAIL; 493 } 494 495 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) 496 { 497 DECODE_HEAD; 498 499 READ_BUF(4); 500 READ32(bc->bc_cb_program); 501 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); 502 503 DECODE_TAIL; 504 } 505 506 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) 507 { 508 DECODE_HEAD; 509 510 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); 511 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 512 READ32(bcts->dir); 513 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker 514 * could help us figure out we should be using it. */ 515 DECODE_TAIL; 516 } 517 518 static __be32 519 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 520 { 521 DECODE_HEAD; 522 523 READ_BUF(4); 524 READ32(close->cl_seqid); 525 return nfsd4_decode_stateid(argp, &close->cl_stateid); 526 527 DECODE_TAIL; 528 } 529 530 531 static __be32 532 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 533 { 534 DECODE_HEAD; 535 536 READ_BUF(12); 537 READ64(commit->co_offset); 538 READ32(commit->co_count); 539 540 DECODE_TAIL; 541 } 542 543 static __be32 544 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 545 { 546 DECODE_HEAD; 547 548 READ_BUF(4); 549 READ32(create->cr_type); 550 switch (create->cr_type) { 551 case NF4LNK: 552 READ_BUF(4); 553 READ32(create->cr_linklen); 554 READ_BUF(create->cr_linklen); 555 SAVEMEM(create->cr_linkname, create->cr_linklen); 556 break; 557 case NF4BLK: 558 case NF4CHR: 559 READ_BUF(8); 560 READ32(create->cr_specdata1); 561 READ32(create->cr_specdata2); 562 break; 563 case NF4SOCK: 564 case NF4FIFO: 565 case NF4DIR: 566 default: 567 break; 568 } 569 570 READ_BUF(4); 571 READ32(create->cr_namelen); 572 READ_BUF(create->cr_namelen); 573 SAVEMEM(create->cr_name, create->cr_namelen); 574 if ((status = check_filename(create->cr_name, create->cr_namelen))) 575 return status; 576 577 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 578 &create->cr_acl); 579 if (status) 580 goto out; 581 582 DECODE_TAIL; 583 } 584 585 static inline __be32 586 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 587 { 588 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 589 } 590 591 static inline __be32 592 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 593 { 594 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 595 } 596 597 static __be32 598 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 599 { 600 DECODE_HEAD; 601 602 READ_BUF(4); 603 READ32(link->li_namelen); 604 READ_BUF(link->li_namelen); 605 SAVEMEM(link->li_name, link->li_namelen); 606 if ((status = check_filename(link->li_name, link->li_namelen))) 607 return status; 608 609 DECODE_TAIL; 610 } 611 612 static __be32 613 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 614 { 615 DECODE_HEAD; 616 617 /* 618 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 619 */ 620 READ_BUF(28); 621 READ32(lock->lk_type); 622 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 623 goto xdr_error; 624 READ32(lock->lk_reclaim); 625 READ64(lock->lk_offset); 626 READ64(lock->lk_length); 627 READ32(lock->lk_is_new); 628 629 if (lock->lk_is_new) { 630 READ_BUF(4); 631 READ32(lock->lk_new_open_seqid); 632 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 633 if (status) 634 return status; 635 READ_BUF(8 + sizeof(clientid_t)); 636 READ32(lock->lk_new_lock_seqid); 637 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 638 READ32(lock->lk_new_owner.len); 639 READ_BUF(lock->lk_new_owner.len); 640 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 641 } else { 642 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 643 if (status) 644 return status; 645 READ_BUF(4); 646 READ32(lock->lk_old_lock_seqid); 647 } 648 649 DECODE_TAIL; 650 } 651 652 static __be32 653 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 654 { 655 DECODE_HEAD; 656 657 READ_BUF(32); 658 READ32(lockt->lt_type); 659 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 660 goto xdr_error; 661 READ64(lockt->lt_offset); 662 READ64(lockt->lt_length); 663 COPYMEM(&lockt->lt_clientid, 8); 664 READ32(lockt->lt_owner.len); 665 READ_BUF(lockt->lt_owner.len); 666 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 667 668 DECODE_TAIL; 669 } 670 671 static __be32 672 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 673 { 674 DECODE_HEAD; 675 676 READ_BUF(8); 677 READ32(locku->lu_type); 678 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 679 goto xdr_error; 680 READ32(locku->lu_seqid); 681 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 682 if (status) 683 return status; 684 READ_BUF(16); 685 READ64(locku->lu_offset); 686 READ64(locku->lu_length); 687 688 DECODE_TAIL; 689 } 690 691 static __be32 692 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 693 { 694 DECODE_HEAD; 695 696 READ_BUF(4); 697 READ32(lookup->lo_len); 698 READ_BUF(lookup->lo_len); 699 SAVEMEM(lookup->lo_name, lookup->lo_len); 700 if ((status = check_filename(lookup->lo_name, lookup->lo_len))) 701 return status; 702 703 DECODE_TAIL; 704 } 705 706 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) 707 { 708 __be32 *p; 709 u32 w; 710 711 READ_BUF(4); 712 READ32(w); 713 *share_access = w & NFS4_SHARE_ACCESS_MASK; 714 *deleg_want = w & NFS4_SHARE_WANT_MASK; 715 if (deleg_when) 716 *deleg_when = w & NFS4_SHARE_WHEN_MASK; 717 718 switch (w & NFS4_SHARE_ACCESS_MASK) { 719 case NFS4_SHARE_ACCESS_READ: 720 case NFS4_SHARE_ACCESS_WRITE: 721 case NFS4_SHARE_ACCESS_BOTH: 722 break; 723 default: 724 return nfserr_bad_xdr; 725 } 726 w &= ~NFS4_SHARE_ACCESS_MASK; 727 if (!w) 728 return nfs_ok; 729 if (!argp->minorversion) 730 return nfserr_bad_xdr; 731 switch (w & NFS4_SHARE_WANT_MASK) { 732 case NFS4_SHARE_WANT_NO_PREFERENCE: 733 case NFS4_SHARE_WANT_READ_DELEG: 734 case NFS4_SHARE_WANT_WRITE_DELEG: 735 case NFS4_SHARE_WANT_ANY_DELEG: 736 case NFS4_SHARE_WANT_NO_DELEG: 737 case NFS4_SHARE_WANT_CANCEL: 738 break; 739 default: 740 return nfserr_bad_xdr; 741 } 742 w &= ~NFS4_SHARE_WANT_MASK; 743 if (!w) 744 return nfs_ok; 745 746 if (!deleg_when) /* open_downgrade */ 747 return nfserr_inval; 748 switch (w) { 749 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: 750 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: 751 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | 752 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): 753 return nfs_ok; 754 } 755 xdr_error: 756 return nfserr_bad_xdr; 757 } 758 759 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) 760 { 761 __be32 *p; 762 763 READ_BUF(4); 764 READ32(*x); 765 /* Note: unlinke access bits, deny bits may be zero. */ 766 if (*x & ~NFS4_SHARE_DENY_BOTH) 767 return nfserr_bad_xdr; 768 return nfs_ok; 769 xdr_error: 770 return nfserr_bad_xdr; 771 } 772 773 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) 774 { 775 __be32 *p; 776 777 READ_BUF(4); 778 READ32(o->len); 779 780 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) 781 return nfserr_bad_xdr; 782 783 READ_BUF(o->len); 784 SAVEMEM(o->data, o->len); 785 return nfs_ok; 786 xdr_error: 787 return nfserr_bad_xdr; 788 } 789 790 static __be32 791 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 792 { 793 DECODE_HEAD; 794 u32 dummy; 795 796 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 797 open->op_iattr.ia_valid = 0; 798 open->op_openowner = NULL; 799 800 /* seqid, share_access, share_deny, clientid, ownerlen */ 801 READ_BUF(4); 802 READ32(open->op_seqid); 803 /* decode, yet ignore deleg_when until supported */ 804 status = nfsd4_decode_share_access(argp, &open->op_share_access, 805 &open->op_deleg_want, &dummy); 806 if (status) 807 goto xdr_error; 808 status = nfsd4_decode_share_deny(argp, &open->op_share_deny); 809 if (status) 810 goto xdr_error; 811 READ_BUF(sizeof(clientid_t)); 812 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 813 status = nfsd4_decode_opaque(argp, &open->op_owner); 814 if (status) 815 goto xdr_error; 816 READ_BUF(4); 817 READ32(open->op_create); 818 switch (open->op_create) { 819 case NFS4_OPEN_NOCREATE: 820 break; 821 case NFS4_OPEN_CREATE: 822 READ_BUF(4); 823 READ32(open->op_createmode); 824 switch (open->op_createmode) { 825 case NFS4_CREATE_UNCHECKED: 826 case NFS4_CREATE_GUARDED: 827 status = nfsd4_decode_fattr(argp, open->op_bmval, 828 &open->op_iattr, &open->op_acl); 829 if (status) 830 goto out; 831 break; 832 case NFS4_CREATE_EXCLUSIVE: 833 READ_BUF(NFS4_VERIFIER_SIZE); 834 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 835 break; 836 case NFS4_CREATE_EXCLUSIVE4_1: 837 if (argp->minorversion < 1) 838 goto xdr_error; 839 READ_BUF(NFS4_VERIFIER_SIZE); 840 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); 841 status = nfsd4_decode_fattr(argp, open->op_bmval, 842 &open->op_iattr, &open->op_acl); 843 if (status) 844 goto out; 845 break; 846 default: 847 goto xdr_error; 848 } 849 break; 850 default: 851 goto xdr_error; 852 } 853 854 /* open_claim */ 855 READ_BUF(4); 856 READ32(open->op_claim_type); 857 switch (open->op_claim_type) { 858 case NFS4_OPEN_CLAIM_NULL: 859 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 860 READ_BUF(4); 861 READ32(open->op_fname.len); 862 READ_BUF(open->op_fname.len); 863 SAVEMEM(open->op_fname.data, open->op_fname.len); 864 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 865 return status; 866 break; 867 case NFS4_OPEN_CLAIM_PREVIOUS: 868 READ_BUF(4); 869 READ32(open->op_delegate_type); 870 break; 871 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 872 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 873 if (status) 874 return status; 875 READ_BUF(4); 876 READ32(open->op_fname.len); 877 READ_BUF(open->op_fname.len); 878 SAVEMEM(open->op_fname.data, open->op_fname.len); 879 if ((status = check_filename(open->op_fname.data, open->op_fname.len))) 880 return status; 881 break; 882 case NFS4_OPEN_CLAIM_FH: 883 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 884 if (argp->minorversion < 1) 885 goto xdr_error; 886 /* void */ 887 break; 888 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 889 if (argp->minorversion < 1) 890 goto xdr_error; 891 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 892 if (status) 893 return status; 894 break; 895 default: 896 goto xdr_error; 897 } 898 899 DECODE_TAIL; 900 } 901 902 static __be32 903 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 904 { 905 DECODE_HEAD; 906 907 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 908 if (status) 909 return status; 910 READ_BUF(4); 911 READ32(open_conf->oc_seqid); 912 913 DECODE_TAIL; 914 } 915 916 static __be32 917 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 918 { 919 DECODE_HEAD; 920 921 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 922 if (status) 923 return status; 924 READ_BUF(4); 925 READ32(open_down->od_seqid); 926 status = nfsd4_decode_share_access(argp, &open_down->od_share_access, 927 &open_down->od_deleg_want, NULL); 928 if (status) 929 return status; 930 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); 931 if (status) 932 return status; 933 DECODE_TAIL; 934 } 935 936 static __be32 937 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 938 { 939 DECODE_HEAD; 940 941 READ_BUF(4); 942 READ32(putfh->pf_fhlen); 943 if (putfh->pf_fhlen > NFS4_FHSIZE) 944 goto xdr_error; 945 READ_BUF(putfh->pf_fhlen); 946 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 947 948 DECODE_TAIL; 949 } 950 951 static __be32 952 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 953 { 954 DECODE_HEAD; 955 956 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 957 if (status) 958 return status; 959 READ_BUF(12); 960 READ64(read->rd_offset); 961 READ32(read->rd_length); 962 963 DECODE_TAIL; 964 } 965 966 static __be32 967 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 968 { 969 DECODE_HEAD; 970 971 READ_BUF(24); 972 READ64(readdir->rd_cookie); 973 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 974 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 975 READ32(readdir->rd_maxcount); 976 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 977 goto out; 978 979 DECODE_TAIL; 980 } 981 982 static __be32 983 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 984 { 985 DECODE_HEAD; 986 987 READ_BUF(4); 988 READ32(remove->rm_namelen); 989 READ_BUF(remove->rm_namelen); 990 SAVEMEM(remove->rm_name, remove->rm_namelen); 991 if ((status = check_filename(remove->rm_name, remove->rm_namelen))) 992 return status; 993 994 DECODE_TAIL; 995 } 996 997 static __be32 998 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 999 { 1000 DECODE_HEAD; 1001 1002 READ_BUF(4); 1003 READ32(rename->rn_snamelen); 1004 READ_BUF(rename->rn_snamelen + 4); 1005 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 1006 READ32(rename->rn_tnamelen); 1007 READ_BUF(rename->rn_tnamelen); 1008 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 1009 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) 1010 return status; 1011 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) 1012 return status; 1013 1014 DECODE_TAIL; 1015 } 1016 1017 static __be32 1018 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 1019 { 1020 DECODE_HEAD; 1021 1022 READ_BUF(sizeof(clientid_t)); 1023 COPYMEM(clientid, sizeof(clientid_t)); 1024 1025 DECODE_TAIL; 1026 } 1027 1028 static __be32 1029 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 1030 struct nfsd4_secinfo *secinfo) 1031 { 1032 DECODE_HEAD; 1033 1034 READ_BUF(4); 1035 READ32(secinfo->si_namelen); 1036 READ_BUF(secinfo->si_namelen); 1037 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 1038 status = check_filename(secinfo->si_name, secinfo->si_namelen); 1039 if (status) 1040 return status; 1041 DECODE_TAIL; 1042 } 1043 1044 static __be32 1045 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, 1046 struct nfsd4_secinfo_no_name *sin) 1047 { 1048 DECODE_HEAD; 1049 1050 READ_BUF(4); 1051 READ32(sin->sin_style); 1052 DECODE_TAIL; 1053 } 1054 1055 static __be32 1056 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 1057 { 1058 __be32 status; 1059 1060 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 1061 if (status) 1062 return status; 1063 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 1064 &setattr->sa_acl); 1065 } 1066 1067 static __be32 1068 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 1069 { 1070 DECODE_HEAD; 1071 1072 READ_BUF(NFS4_VERIFIER_SIZE); 1073 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); 1074 1075 status = nfsd4_decode_opaque(argp, &setclientid->se_name); 1076 if (status) 1077 return nfserr_bad_xdr; 1078 READ_BUF(8); 1079 READ32(setclientid->se_callback_prog); 1080 READ32(setclientid->se_callback_netid_len); 1081 1082 READ_BUF(setclientid->se_callback_netid_len + 4); 1083 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 1084 READ32(setclientid->se_callback_addr_len); 1085 1086 READ_BUF(setclientid->se_callback_addr_len + 4); 1087 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 1088 READ32(setclientid->se_callback_ident); 1089 1090 DECODE_TAIL; 1091 } 1092 1093 static __be32 1094 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 1095 { 1096 DECODE_HEAD; 1097 1098 READ_BUF(8 + NFS4_VERIFIER_SIZE); 1099 COPYMEM(&scd_c->sc_clientid, 8); 1100 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); 1101 1102 DECODE_TAIL; 1103 } 1104 1105 /* Also used for NVERIFY */ 1106 static __be32 1107 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 1108 { 1109 DECODE_HEAD; 1110 1111 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 1112 goto out; 1113 1114 /* For convenience's sake, we compare raw xdr'd attributes in 1115 * nfsd4_proc_verify */ 1116 1117 READ_BUF(4); 1118 READ32(verify->ve_attrlen); 1119 READ_BUF(verify->ve_attrlen); 1120 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 1121 1122 DECODE_TAIL; 1123 } 1124 1125 static __be32 1126 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 1127 { 1128 int avail; 1129 int len; 1130 DECODE_HEAD; 1131 1132 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 1133 if (status) 1134 return status; 1135 READ_BUF(16); 1136 READ64(write->wr_offset); 1137 READ32(write->wr_stable_how); 1138 if (write->wr_stable_how > 2) 1139 goto xdr_error; 1140 READ32(write->wr_buflen); 1141 1142 /* Sorry .. no magic macros for this.. * 1143 * READ_BUF(write->wr_buflen); 1144 * SAVEMEM(write->wr_buf, write->wr_buflen); 1145 */ 1146 avail = (char*)argp->end - (char*)argp->p; 1147 if (avail + argp->pagelen < write->wr_buflen) { 1148 dprintk("NFSD: xdr error (%s:%d)\n", 1149 __FILE__, __LINE__); 1150 goto xdr_error; 1151 } 1152 write->wr_head.iov_base = p; 1153 write->wr_head.iov_len = avail; 1154 WARN_ON(avail != (XDR_QUADLEN(avail) << 2)); 1155 write->wr_pagelist = argp->pagelist; 1156 1157 len = XDR_QUADLEN(write->wr_buflen) << 2; 1158 if (len >= avail) { 1159 int pages; 1160 1161 len -= avail; 1162 1163 pages = len >> PAGE_SHIFT; 1164 argp->pagelist += pages; 1165 argp->pagelen -= pages * PAGE_SIZE; 1166 len -= pages * PAGE_SIZE; 1167 1168 argp->p = (__be32 *)page_address(argp->pagelist[0]); 1169 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); 1170 } 1171 argp->p += XDR_QUADLEN(len); 1172 1173 DECODE_TAIL; 1174 } 1175 1176 static __be32 1177 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 1178 { 1179 DECODE_HEAD; 1180 1181 READ_BUF(12); 1182 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 1183 READ32(rlockowner->rl_owner.len); 1184 READ_BUF(rlockowner->rl_owner.len); 1185 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 1186 1187 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 1188 return nfserr_inval; 1189 DECODE_TAIL; 1190 } 1191 1192 static __be32 1193 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 1194 struct nfsd4_exchange_id *exid) 1195 { 1196 int dummy, tmp; 1197 DECODE_HEAD; 1198 1199 READ_BUF(NFS4_VERIFIER_SIZE); 1200 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 1201 1202 status = nfsd4_decode_opaque(argp, &exid->clname); 1203 if (status) 1204 return nfserr_bad_xdr; 1205 1206 READ_BUF(4); 1207 READ32(exid->flags); 1208 1209 /* Ignore state_protect4_a */ 1210 READ_BUF(4); 1211 READ32(exid->spa_how); 1212 switch (exid->spa_how) { 1213 case SP4_NONE: 1214 break; 1215 case SP4_MACH_CRED: 1216 /* spo_must_enforce */ 1217 READ_BUF(4); 1218 READ32(dummy); 1219 READ_BUF(dummy * 4); 1220 p += dummy; 1221 1222 /* spo_must_allow */ 1223 READ_BUF(4); 1224 READ32(dummy); 1225 READ_BUF(dummy * 4); 1226 p += dummy; 1227 break; 1228 case SP4_SSV: 1229 /* ssp_ops */ 1230 READ_BUF(4); 1231 READ32(dummy); 1232 READ_BUF(dummy * 4); 1233 p += dummy; 1234 1235 READ_BUF(4); 1236 READ32(dummy); 1237 READ_BUF(dummy * 4); 1238 p += dummy; 1239 1240 /* ssp_hash_algs<> */ 1241 READ_BUF(4); 1242 READ32(tmp); 1243 while (tmp--) { 1244 READ_BUF(4); 1245 READ32(dummy); 1246 READ_BUF(dummy); 1247 p += XDR_QUADLEN(dummy); 1248 } 1249 1250 /* ssp_encr_algs<> */ 1251 READ_BUF(4); 1252 READ32(tmp); 1253 while (tmp--) { 1254 READ_BUF(4); 1255 READ32(dummy); 1256 READ_BUF(dummy); 1257 p += XDR_QUADLEN(dummy); 1258 } 1259 1260 /* ssp_window and ssp_num_gss_handles */ 1261 READ_BUF(8); 1262 READ32(dummy); 1263 READ32(dummy); 1264 break; 1265 default: 1266 goto xdr_error; 1267 } 1268 1269 /* Ignore Implementation ID */ 1270 READ_BUF(4); /* nfs_impl_id4 array length */ 1271 READ32(dummy); 1272 1273 if (dummy > 1) 1274 goto xdr_error; 1275 1276 if (dummy == 1) { 1277 /* nii_domain */ 1278 READ_BUF(4); 1279 READ32(dummy); 1280 READ_BUF(dummy); 1281 p += XDR_QUADLEN(dummy); 1282 1283 /* nii_name */ 1284 READ_BUF(4); 1285 READ32(dummy); 1286 READ_BUF(dummy); 1287 p += XDR_QUADLEN(dummy); 1288 1289 /* nii_date */ 1290 READ_BUF(12); 1291 p += 3; 1292 } 1293 DECODE_TAIL; 1294 } 1295 1296 static __be32 1297 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1298 struct nfsd4_create_session *sess) 1299 { 1300 DECODE_HEAD; 1301 u32 dummy; 1302 1303 READ_BUF(16); 1304 COPYMEM(&sess->clientid, 8); 1305 READ32(sess->seqid); 1306 READ32(sess->flags); 1307 1308 /* Fore channel attrs */ 1309 READ_BUF(28); 1310 READ32(dummy); /* headerpadsz is always 0 */ 1311 READ32(sess->fore_channel.maxreq_sz); 1312 READ32(sess->fore_channel.maxresp_sz); 1313 READ32(sess->fore_channel.maxresp_cached); 1314 READ32(sess->fore_channel.maxops); 1315 READ32(sess->fore_channel.maxreqs); 1316 READ32(sess->fore_channel.nr_rdma_attrs); 1317 if (sess->fore_channel.nr_rdma_attrs == 1) { 1318 READ_BUF(4); 1319 READ32(sess->fore_channel.rdma_attrs); 1320 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1321 dprintk("Too many fore channel attr bitmaps!\n"); 1322 goto xdr_error; 1323 } 1324 1325 /* Back channel attrs */ 1326 READ_BUF(28); 1327 READ32(dummy); /* headerpadsz is always 0 */ 1328 READ32(sess->back_channel.maxreq_sz); 1329 READ32(sess->back_channel.maxresp_sz); 1330 READ32(sess->back_channel.maxresp_cached); 1331 READ32(sess->back_channel.maxops); 1332 READ32(sess->back_channel.maxreqs); 1333 READ32(sess->back_channel.nr_rdma_attrs); 1334 if (sess->back_channel.nr_rdma_attrs == 1) { 1335 READ_BUF(4); 1336 READ32(sess->back_channel.rdma_attrs); 1337 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1338 dprintk("Too many back channel attr bitmaps!\n"); 1339 goto xdr_error; 1340 } 1341 1342 READ_BUF(4); 1343 READ32(sess->callback_prog); 1344 nfsd4_decode_cb_sec(argp, &sess->cb_sec); 1345 DECODE_TAIL; 1346 } 1347 1348 static __be32 1349 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1350 struct nfsd4_destroy_session *destroy_session) 1351 { 1352 DECODE_HEAD; 1353 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1354 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1355 1356 DECODE_TAIL; 1357 } 1358 1359 static __be32 1360 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, 1361 struct nfsd4_free_stateid *free_stateid) 1362 { 1363 DECODE_HEAD; 1364 1365 READ_BUF(sizeof(stateid_t)); 1366 READ32(free_stateid->fr_stateid.si_generation); 1367 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); 1368 1369 DECODE_TAIL; 1370 } 1371 1372 static __be32 1373 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1374 struct nfsd4_sequence *seq) 1375 { 1376 DECODE_HEAD; 1377 1378 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1379 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1380 READ32(seq->seqid); 1381 READ32(seq->slotid); 1382 READ32(seq->maxslots); 1383 READ32(seq->cachethis); 1384 1385 DECODE_TAIL; 1386 } 1387 1388 static __be32 1389 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) 1390 { 1391 int i; 1392 __be32 *p, status; 1393 struct nfsd4_test_stateid_id *stateid; 1394 1395 READ_BUF(4); 1396 test_stateid->ts_num_ids = ntohl(*p++); 1397 1398 INIT_LIST_HEAD(&test_stateid->ts_stateid_list); 1399 1400 for (i = 0; i < test_stateid->ts_num_ids; i++) { 1401 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL); 1402 if (!stateid) { 1403 status = nfserrno(-ENOMEM); 1404 goto out; 1405 } 1406 1407 defer_free(argp, kfree, stateid); 1408 INIT_LIST_HEAD(&stateid->ts_id_list); 1409 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); 1410 1411 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); 1412 if (status) 1413 goto out; 1414 } 1415 1416 status = 0; 1417 out: 1418 return status; 1419 xdr_error: 1420 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); 1421 status = nfserr_bad_xdr; 1422 goto out; 1423 } 1424 1425 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) 1426 { 1427 DECODE_HEAD; 1428 1429 READ_BUF(8); 1430 COPYMEM(&dc->clientid, 8); 1431 1432 DECODE_TAIL; 1433 } 1434 1435 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1436 { 1437 DECODE_HEAD; 1438 1439 READ_BUF(4); 1440 READ32(rc->rca_one_fs); 1441 1442 DECODE_TAIL; 1443 } 1444 1445 static __be32 1446 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1447 { 1448 return nfs_ok; 1449 } 1450 1451 static __be32 1452 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1453 { 1454 return nfserr_notsupp; 1455 } 1456 1457 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1458 1459 static nfsd4_dec nfsd4_dec_ops[] = { 1460 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1461 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1462 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1463 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1464 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1465 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1466 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1467 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1468 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1469 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1470 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1471 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1472 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1473 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1474 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1475 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1476 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1477 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1478 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1479 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1480 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1481 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1482 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1483 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1484 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1485 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1486 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1487 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1488 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1489 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1490 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1491 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1492 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1493 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1494 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1495 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1496 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1497 }; 1498 1499 static nfsd4_dec nfsd41_dec_ops[] = { 1500 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1501 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1502 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1503 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1504 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1505 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1506 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1507 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1508 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1509 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1510 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1511 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1512 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1513 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1514 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1515 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1516 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1517 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1518 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1519 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1520 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1521 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1522 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1523 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1524 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1525 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1526 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1527 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1528 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1529 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1530 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1531 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1532 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1533 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1534 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1535 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1536 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1537 1538 /* new operations for NFSv4.1 */ 1539 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, 1540 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, 1541 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1542 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1543 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1544 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, 1545 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1546 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1547 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1548 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1549 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1550 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1551 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, 1552 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1553 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1554 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, 1555 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1556 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, 1557 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1558 }; 1559 1560 struct nfsd4_minorversion_ops { 1561 nfsd4_dec *decoders; 1562 int nops; 1563 }; 1564 1565 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1566 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1567 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1568 }; 1569 1570 static __be32 1571 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1572 { 1573 DECODE_HEAD; 1574 struct nfsd4_op *op; 1575 struct nfsd4_minorversion_ops *ops; 1576 bool cachethis = false; 1577 int i; 1578 1579 READ_BUF(4); 1580 READ32(argp->taglen); 1581 READ_BUF(argp->taglen + 8); 1582 SAVEMEM(argp->tag, argp->taglen); 1583 READ32(argp->minorversion); 1584 READ32(argp->opcnt); 1585 1586 if (argp->taglen > NFSD4_MAX_TAGLEN) 1587 goto xdr_error; 1588 if (argp->opcnt > 100) 1589 goto xdr_error; 1590 1591 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1592 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1593 if (!argp->ops) { 1594 argp->ops = argp->iops; 1595 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1596 goto xdr_error; 1597 } 1598 } 1599 1600 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1601 argp->opcnt = 0; 1602 1603 ops = &nfsd4_minorversion[argp->minorversion]; 1604 for (i = 0; i < argp->opcnt; i++) { 1605 op = &argp->ops[i]; 1606 op->replay = NULL; 1607 1608 READ_BUF(4); 1609 READ32(op->opnum); 1610 1611 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1612 op->status = ops->decoders[op->opnum](argp, &op->u); 1613 else { 1614 op->opnum = OP_ILLEGAL; 1615 op->status = nfserr_op_illegal; 1616 } 1617 1618 if (op->status) { 1619 argp->opcnt = i+1; 1620 break; 1621 } 1622 /* 1623 * We'll try to cache the result in the DRC if any one 1624 * op in the compound wants to be cached: 1625 */ 1626 cachethis |= nfsd4_cache_this_op(op); 1627 } 1628 /* Sessions make the DRC unnecessary: */ 1629 if (argp->minorversion) 1630 cachethis = false; 1631 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; 1632 1633 DECODE_TAIL; 1634 } 1635 1636 #define WRITE32(n) *p++ = htonl(n) 1637 #define WRITE64(n) do { \ 1638 *p++ = htonl((u32)((n) >> 32)); \ 1639 *p++ = htonl((u32)(n)); \ 1640 } while (0) 1641 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1642 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1643 memcpy(p, ptr, nbytes); \ 1644 p += XDR_QUADLEN(nbytes); \ 1645 }} while (0) 1646 1647 static void write32(__be32 **p, u32 n) 1648 { 1649 *(*p)++ = htonl(n); 1650 } 1651 1652 static void write64(__be32 **p, u64 n) 1653 { 1654 write32(p, (n >> 32)); 1655 write32(p, (u32)n); 1656 } 1657 1658 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1659 { 1660 if (IS_I_VERSION(inode)) { 1661 write64(p, inode->i_version); 1662 } else { 1663 write32(p, stat->ctime.tv_sec); 1664 write32(p, stat->ctime.tv_nsec); 1665 } 1666 } 1667 1668 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1669 { 1670 write32(p, c->atomic); 1671 if (c->change_supported) { 1672 write64(p, c->before_change); 1673 write64(p, c->after_change); 1674 } else { 1675 write32(p, c->before_ctime_sec); 1676 write32(p, c->before_ctime_nsec); 1677 write32(p, c->after_ctime_sec); 1678 write32(p, c->after_ctime_nsec); 1679 } 1680 } 1681 1682 #define RESERVE_SPACE(nbytes) do { \ 1683 p = resp->p; \ 1684 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1685 } while (0) 1686 #define ADJUST_ARGS() resp->p = p 1687 1688 /* 1689 * Header routine to setup seqid operation replay cache 1690 */ 1691 #define ENCODE_SEQID_OP_HEAD \ 1692 __be32 *save; \ 1693 \ 1694 save = resp->p; 1695 1696 /* 1697 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1698 * is where sequence id's are incremented, and the replay cache is filled. 1699 * Note that we increment sequence id's here, at the last moment, so we're sure 1700 * we know whether the error to be returned is a sequence id mutating error. 1701 */ 1702 1703 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr) 1704 { 1705 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner; 1706 1707 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) { 1708 stateowner->so_seqid++; 1709 stateowner->so_replay.rp_status = nfserr; 1710 stateowner->so_replay.rp_buflen = 1711 (char *)resp->p - (char *)save; 1712 memcpy(stateowner->so_replay.rp_buf, save, 1713 stateowner->so_replay.rp_buflen); 1714 nfsd4_purge_closed_stateid(stateowner); 1715 } 1716 } 1717 1718 /* Encode as an array of strings the string given with components 1719 * separated @sep, escaped with esc_enter and esc_exit. 1720 */ 1721 static __be32 nfsd4_encode_components_esc(char sep, char *components, 1722 __be32 **pp, int *buflen, 1723 char esc_enter, char esc_exit) 1724 { 1725 __be32 *p = *pp; 1726 __be32 *countp = p; 1727 int strlen, count=0; 1728 char *str, *end, *next; 1729 1730 dprintk("nfsd4_encode_components(%s)\n", components); 1731 if ((*buflen -= 4) < 0) 1732 return nfserr_resource; 1733 WRITE32(0); /* We will fill this in with @count later */ 1734 end = str = components; 1735 while (*end) { 1736 bool found_esc = false; 1737 1738 /* try to parse as esc_start, ..., esc_end, sep */ 1739 if (*str == esc_enter) { 1740 for (; *end && (*end != esc_exit); end++) 1741 /* find esc_exit or end of string */; 1742 next = end + 1; 1743 if (*end && (!*next || *next == sep)) { 1744 str++; 1745 found_esc = true; 1746 } 1747 } 1748 1749 if (!found_esc) 1750 for (; *end && (*end != sep); end++) 1751 /* find sep or end of string */; 1752 1753 strlen = end - str; 1754 if (strlen) { 1755 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1756 return nfserr_resource; 1757 WRITE32(strlen); 1758 WRITEMEM(str, strlen); 1759 count++; 1760 } 1761 else 1762 end++; 1763 str = end; 1764 } 1765 *pp = p; 1766 p = countp; 1767 WRITE32(count); 1768 return 0; 1769 } 1770 1771 /* Encode as an array of strings the string given with components 1772 * separated @sep. 1773 */ 1774 static __be32 nfsd4_encode_components(char sep, char *components, 1775 __be32 **pp, int *buflen) 1776 { 1777 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0); 1778 } 1779 1780 /* 1781 * encode a location element of a fs_locations structure 1782 */ 1783 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1784 __be32 **pp, int *buflen) 1785 { 1786 __be32 status; 1787 __be32 *p = *pp; 1788 1789 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen, 1790 '[', ']'); 1791 if (status) 1792 return status; 1793 status = nfsd4_encode_components('/', location->path, &p, buflen); 1794 if (status) 1795 return status; 1796 *pp = p; 1797 return 0; 1798 } 1799 1800 /* 1801 * Encode a path in RFC3530 'pathname4' format 1802 */ 1803 static __be32 nfsd4_encode_path(const struct path *root, 1804 const struct path *path, __be32 **pp, int *buflen) 1805 { 1806 struct path cur = { 1807 .mnt = path->mnt, 1808 .dentry = path->dentry, 1809 }; 1810 __be32 *p = *pp; 1811 struct dentry **components = NULL; 1812 unsigned int ncomponents = 0; 1813 __be32 err = nfserr_jukebox; 1814 1815 dprintk("nfsd4_encode_components("); 1816 1817 path_get(&cur); 1818 /* First walk the path up to the nfsd root, and store the 1819 * dentries/path components in an array. 1820 */ 1821 for (;;) { 1822 if (cur.dentry == root->dentry && cur.mnt == root->mnt) 1823 break; 1824 if (cur.dentry == cur.mnt->mnt_root) { 1825 if (follow_up(&cur)) 1826 continue; 1827 goto out_free; 1828 } 1829 if ((ncomponents & 15) == 0) { 1830 struct dentry **new; 1831 new = krealloc(components, 1832 sizeof(*new) * (ncomponents + 16), 1833 GFP_KERNEL); 1834 if (!new) 1835 goto out_free; 1836 components = new; 1837 } 1838 components[ncomponents++] = cur.dentry; 1839 cur.dentry = dget_parent(cur.dentry); 1840 } 1841 1842 *buflen -= 4; 1843 if (*buflen < 0) 1844 goto out_free; 1845 WRITE32(ncomponents); 1846 1847 while (ncomponents) { 1848 struct dentry *dentry = components[ncomponents - 1]; 1849 unsigned int len = dentry->d_name.len; 1850 1851 *buflen -= 4 + (XDR_QUADLEN(len) << 2); 1852 if (*buflen < 0) 1853 goto out_free; 1854 WRITE32(len); 1855 WRITEMEM(dentry->d_name.name, len); 1856 dprintk("/%s", dentry->d_name.name); 1857 dput(dentry); 1858 ncomponents--; 1859 } 1860 1861 *pp = p; 1862 err = 0; 1863 out_free: 1864 dprintk(")\n"); 1865 while (ncomponents) 1866 dput(components[--ncomponents]); 1867 kfree(components); 1868 path_put(&cur); 1869 return err; 1870 } 1871 1872 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, 1873 const struct path *path, __be32 **pp, int *buflen) 1874 { 1875 struct svc_export *exp_ps; 1876 __be32 res; 1877 1878 exp_ps = rqst_find_fsidzero_export(rqstp); 1879 if (IS_ERR(exp_ps)) 1880 return nfserrno(PTR_ERR(exp_ps)); 1881 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); 1882 exp_put(exp_ps); 1883 return res; 1884 } 1885 1886 /* 1887 * encode a fs_locations structure 1888 */ 1889 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1890 struct svc_export *exp, 1891 __be32 **pp, int *buflen) 1892 { 1893 __be32 status; 1894 int i; 1895 __be32 *p = *pp; 1896 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1897 1898 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); 1899 if (status) 1900 return status; 1901 if ((*buflen -= 4) < 0) 1902 return nfserr_resource; 1903 WRITE32(fslocs->locations_count); 1904 for (i=0; i<fslocs->locations_count; i++) { 1905 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1906 &p, buflen); 1907 if (status) 1908 return status; 1909 } 1910 *pp = p; 1911 return 0; 1912 } 1913 1914 static u32 nfs4_file_type(umode_t mode) 1915 { 1916 switch (mode & S_IFMT) { 1917 case S_IFIFO: return NF4FIFO; 1918 case S_IFCHR: return NF4CHR; 1919 case S_IFDIR: return NF4DIR; 1920 case S_IFBLK: return NF4BLK; 1921 case S_IFLNK: return NF4LNK; 1922 case S_IFREG: return NF4REG; 1923 case S_IFSOCK: return NF4SOCK; 1924 default: return NF4BAD; 1925 }; 1926 } 1927 1928 static __be32 1929 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1930 __be32 **p, int *buflen) 1931 { 1932 int status; 1933 1934 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1935 return nfserr_resource; 1936 if (whotype != NFS4_ACL_WHO_NAMED) 1937 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1938 else if (group) 1939 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1940 else 1941 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1942 if (status < 0) 1943 return nfserrno(status); 1944 *p = xdr_encode_opaque(*p, NULL, status); 1945 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1946 BUG_ON(*buflen < 0); 1947 return 0; 1948 } 1949 1950 static inline __be32 1951 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1952 { 1953 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1954 } 1955 1956 static inline __be32 1957 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1958 { 1959 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1960 } 1961 1962 static inline __be32 1963 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1964 __be32 **p, int *buflen) 1965 { 1966 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1967 } 1968 1969 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1970 FATTR4_WORD0_RDATTR_ERROR) 1971 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1972 1973 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1974 { 1975 /* As per referral draft: */ 1976 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1977 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1978 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1979 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1980 *rdattr_err = NFSERR_MOVED; 1981 else 1982 return nfserr_moved; 1983 } 1984 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1985 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1986 return 0; 1987 } 1988 1989 1990 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) 1991 { 1992 struct path path = exp->ex_path; 1993 int err; 1994 1995 path_get(&path); 1996 while (follow_up(&path)) { 1997 if (path.dentry != path.mnt->mnt_root) 1998 break; 1999 } 2000 err = vfs_getattr(path.mnt, path.dentry, stat); 2001 path_put(&path); 2002 return err; 2003 } 2004 2005 /* 2006 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 2007 * ourselves. 2008 * 2009 * @countp is the buffer size in _words_; upon successful return this becomes 2010 * replaced with the number of words written. 2011 */ 2012 __be32 2013 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 2014 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 2015 struct svc_rqst *rqstp, int ignore_crossmnt) 2016 { 2017 u32 bmval0 = bmval[0]; 2018 u32 bmval1 = bmval[1]; 2019 u32 bmval2 = bmval[2]; 2020 struct kstat stat; 2021 struct svc_fh tempfh; 2022 struct kstatfs statfs; 2023 int buflen = *countp << 2; 2024 __be32 *attrlenp; 2025 u32 dummy; 2026 u64 dummy64; 2027 u32 rdattr_err = 0; 2028 __be32 *p = buffer; 2029 __be32 status; 2030 int err; 2031 int aclsupport = 0; 2032 struct nfs4_acl *acl = NULL; 2033 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2034 u32 minorversion = resp->cstate.minorversion; 2035 struct path path = { 2036 .mnt = exp->ex_path.mnt, 2037 .dentry = dentry, 2038 }; 2039 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2040 2041 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 2042 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 2043 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 2044 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 2045 2046 if (exp->ex_fslocs.migrated) { 2047 BUG_ON(bmval[2]); 2048 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 2049 if (status) 2050 goto out; 2051 } 2052 2053 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 2054 if (err) 2055 goto out_nfserr; 2056 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 2057 FATTR4_WORD0_MAXNAME)) || 2058 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 2059 FATTR4_WORD1_SPACE_TOTAL))) { 2060 err = vfs_statfs(&path, &statfs); 2061 if (err) 2062 goto out_nfserr; 2063 } 2064 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 2065 fh_init(&tempfh, NFS4_FHSIZE); 2066 status = fh_compose(&tempfh, exp, dentry, NULL); 2067 if (status) 2068 goto out; 2069 fhp = &tempfh; 2070 } 2071 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 2072 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 2073 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 2074 aclsupport = (err == 0); 2075 if (bmval0 & FATTR4_WORD0_ACL) { 2076 if (err == -EOPNOTSUPP) 2077 bmval0 &= ~FATTR4_WORD0_ACL; 2078 else if (err == -EINVAL) { 2079 status = nfserr_attrnotsupp; 2080 goto out; 2081 } else if (err != 0) 2082 goto out_nfserr; 2083 } 2084 } 2085 2086 if (bmval2) { 2087 if ((buflen -= 16) < 0) 2088 goto out_resource; 2089 WRITE32(3); 2090 WRITE32(bmval0); 2091 WRITE32(bmval1); 2092 WRITE32(bmval2); 2093 } else if (bmval1) { 2094 if ((buflen -= 12) < 0) 2095 goto out_resource; 2096 WRITE32(2); 2097 WRITE32(bmval0); 2098 WRITE32(bmval1); 2099 } else { 2100 if ((buflen -= 8) < 0) 2101 goto out_resource; 2102 WRITE32(1); 2103 WRITE32(bmval0); 2104 } 2105 attrlenp = p++; /* to be backfilled later */ 2106 2107 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 2108 u32 word0 = nfsd_suppattrs0(minorversion); 2109 u32 word1 = nfsd_suppattrs1(minorversion); 2110 u32 word2 = nfsd_suppattrs2(minorversion); 2111 2112 if (!aclsupport) 2113 word0 &= ~FATTR4_WORD0_ACL; 2114 if (!word2) { 2115 if ((buflen -= 12) < 0) 2116 goto out_resource; 2117 WRITE32(2); 2118 WRITE32(word0); 2119 WRITE32(word1); 2120 } else { 2121 if ((buflen -= 16) < 0) 2122 goto out_resource; 2123 WRITE32(3); 2124 WRITE32(word0); 2125 WRITE32(word1); 2126 WRITE32(word2); 2127 } 2128 } 2129 if (bmval0 & FATTR4_WORD0_TYPE) { 2130 if ((buflen -= 4) < 0) 2131 goto out_resource; 2132 dummy = nfs4_file_type(stat.mode); 2133 if (dummy == NF4BAD) 2134 goto out_serverfault; 2135 WRITE32(dummy); 2136 } 2137 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 2138 if ((buflen -= 4) < 0) 2139 goto out_resource; 2140 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 2141 WRITE32(NFS4_FH_PERSISTENT); 2142 else 2143 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 2144 } 2145 if (bmval0 & FATTR4_WORD0_CHANGE) { 2146 if ((buflen -= 8) < 0) 2147 goto out_resource; 2148 write_change(&p, &stat, dentry->d_inode); 2149 } 2150 if (bmval0 & FATTR4_WORD0_SIZE) { 2151 if ((buflen -= 8) < 0) 2152 goto out_resource; 2153 WRITE64(stat.size); 2154 } 2155 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 2156 if ((buflen -= 4) < 0) 2157 goto out_resource; 2158 WRITE32(1); 2159 } 2160 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 2161 if ((buflen -= 4) < 0) 2162 goto out_resource; 2163 WRITE32(1); 2164 } 2165 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 2166 if ((buflen -= 4) < 0) 2167 goto out_resource; 2168 WRITE32(0); 2169 } 2170 if (bmval0 & FATTR4_WORD0_FSID) { 2171 if ((buflen -= 16) < 0) 2172 goto out_resource; 2173 if (exp->ex_fslocs.migrated) { 2174 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 2175 WRITE64(NFS4_REFERRAL_FSID_MINOR); 2176 } else switch(fsid_source(fhp)) { 2177 case FSIDSOURCE_FSID: 2178 WRITE64((u64)exp->ex_fsid); 2179 WRITE64((u64)0); 2180 break; 2181 case FSIDSOURCE_DEV: 2182 WRITE32(0); 2183 WRITE32(MAJOR(stat.dev)); 2184 WRITE32(0); 2185 WRITE32(MINOR(stat.dev)); 2186 break; 2187 case FSIDSOURCE_UUID: 2188 WRITEMEM(exp->ex_uuid, 16); 2189 break; 2190 } 2191 } 2192 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 2193 if ((buflen -= 4) < 0) 2194 goto out_resource; 2195 WRITE32(0); 2196 } 2197 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 2198 if ((buflen -= 4) < 0) 2199 goto out_resource; 2200 WRITE32(nn->nfsd4_lease); 2201 } 2202 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 2203 if ((buflen -= 4) < 0) 2204 goto out_resource; 2205 WRITE32(rdattr_err); 2206 } 2207 if (bmval0 & FATTR4_WORD0_ACL) { 2208 struct nfs4_ace *ace; 2209 2210 if (acl == NULL) { 2211 if ((buflen -= 4) < 0) 2212 goto out_resource; 2213 2214 WRITE32(0); 2215 goto out_acl; 2216 } 2217 if ((buflen -= 4) < 0) 2218 goto out_resource; 2219 WRITE32(acl->naces); 2220 2221 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 2222 if ((buflen -= 4*3) < 0) 2223 goto out_resource; 2224 WRITE32(ace->type); 2225 WRITE32(ace->flag); 2226 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 2227 status = nfsd4_encode_aclname(rqstp, ace->whotype, 2228 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 2229 &p, &buflen); 2230 if (status == nfserr_resource) 2231 goto out_resource; 2232 if (status) 2233 goto out; 2234 } 2235 } 2236 out_acl: 2237 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 2238 if ((buflen -= 4) < 0) 2239 goto out_resource; 2240 WRITE32(aclsupport ? 2241 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 2242 } 2243 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 2244 if ((buflen -= 4) < 0) 2245 goto out_resource; 2246 WRITE32(1); 2247 } 2248 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 2249 if ((buflen -= 4) < 0) 2250 goto out_resource; 2251 WRITE32(0); 2252 } 2253 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 2254 if ((buflen -= 4) < 0) 2255 goto out_resource; 2256 WRITE32(1); 2257 } 2258 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 2259 if ((buflen -= 4) < 0) 2260 goto out_resource; 2261 WRITE32(1); 2262 } 2263 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 2264 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 2265 if (buflen < 0) 2266 goto out_resource; 2267 WRITE32(fhp->fh_handle.fh_size); 2268 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 2269 } 2270 if (bmval0 & FATTR4_WORD0_FILEID) { 2271 if ((buflen -= 8) < 0) 2272 goto out_resource; 2273 WRITE64(stat.ino); 2274 } 2275 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 2276 if ((buflen -= 8) < 0) 2277 goto out_resource; 2278 WRITE64((u64) statfs.f_ffree); 2279 } 2280 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 2281 if ((buflen -= 8) < 0) 2282 goto out_resource; 2283 WRITE64((u64) statfs.f_ffree); 2284 } 2285 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 2286 if ((buflen -= 8) < 0) 2287 goto out_resource; 2288 WRITE64((u64) statfs.f_files); 2289 } 2290 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 2291 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 2292 if (status == nfserr_resource) 2293 goto out_resource; 2294 if (status) 2295 goto out; 2296 } 2297 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 2298 if ((buflen -= 4) < 0) 2299 goto out_resource; 2300 WRITE32(1); 2301 } 2302 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 2303 if ((buflen -= 8) < 0) 2304 goto out_resource; 2305 WRITE64(~(u64)0); 2306 } 2307 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2308 if ((buflen -= 4) < 0) 2309 goto out_resource; 2310 WRITE32(255); 2311 } 2312 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2313 if ((buflen -= 4) < 0) 2314 goto out_resource; 2315 WRITE32(statfs.f_namelen); 2316 } 2317 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2318 if ((buflen -= 8) < 0) 2319 goto out_resource; 2320 WRITE64((u64) svc_max_payload(rqstp)); 2321 } 2322 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2323 if ((buflen -= 8) < 0) 2324 goto out_resource; 2325 WRITE64((u64) svc_max_payload(rqstp)); 2326 } 2327 if (bmval1 & FATTR4_WORD1_MODE) { 2328 if ((buflen -= 4) < 0) 2329 goto out_resource; 2330 WRITE32(stat.mode & S_IALLUGO); 2331 } 2332 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2333 if ((buflen -= 4) < 0) 2334 goto out_resource; 2335 WRITE32(1); 2336 } 2337 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2338 if ((buflen -= 4) < 0) 2339 goto out_resource; 2340 WRITE32(stat.nlink); 2341 } 2342 if (bmval1 & FATTR4_WORD1_OWNER) { 2343 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2344 if (status == nfserr_resource) 2345 goto out_resource; 2346 if (status) 2347 goto out; 2348 } 2349 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2350 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2351 if (status == nfserr_resource) 2352 goto out_resource; 2353 if (status) 2354 goto out; 2355 } 2356 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2357 if ((buflen -= 8) < 0) 2358 goto out_resource; 2359 WRITE32((u32) MAJOR(stat.rdev)); 2360 WRITE32((u32) MINOR(stat.rdev)); 2361 } 2362 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2363 if ((buflen -= 8) < 0) 2364 goto out_resource; 2365 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2366 WRITE64(dummy64); 2367 } 2368 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2369 if ((buflen -= 8) < 0) 2370 goto out_resource; 2371 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2372 WRITE64(dummy64); 2373 } 2374 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2375 if ((buflen -= 8) < 0) 2376 goto out_resource; 2377 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2378 WRITE64(dummy64); 2379 } 2380 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2381 if ((buflen -= 8) < 0) 2382 goto out_resource; 2383 dummy64 = (u64)stat.blocks << 9; 2384 WRITE64(dummy64); 2385 } 2386 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2387 if ((buflen -= 12) < 0) 2388 goto out_resource; 2389 WRITE32(0); 2390 WRITE32(stat.atime.tv_sec); 2391 WRITE32(stat.atime.tv_nsec); 2392 } 2393 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2394 if ((buflen -= 12) < 0) 2395 goto out_resource; 2396 WRITE32(0); 2397 WRITE32(1); 2398 WRITE32(0); 2399 } 2400 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2401 if ((buflen -= 12) < 0) 2402 goto out_resource; 2403 WRITE32(0); 2404 WRITE32(stat.ctime.tv_sec); 2405 WRITE32(stat.ctime.tv_nsec); 2406 } 2407 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2408 if ((buflen -= 12) < 0) 2409 goto out_resource; 2410 WRITE32(0); 2411 WRITE32(stat.mtime.tv_sec); 2412 WRITE32(stat.mtime.tv_nsec); 2413 } 2414 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2415 if ((buflen -= 8) < 0) 2416 goto out_resource; 2417 /* 2418 * Get parent's attributes if not ignoring crossmount 2419 * and this is the root of a cross-mounted filesystem. 2420 */ 2421 if (ignore_crossmnt == 0 && 2422 dentry == exp->ex_path.mnt->mnt_root) 2423 get_parent_attributes(exp, &stat); 2424 WRITE64(stat.ino); 2425 } 2426 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2427 WRITE32(3); 2428 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2429 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2430 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2431 } 2432 2433 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2434 *countp = p - buffer; 2435 status = nfs_ok; 2436 2437 out: 2438 kfree(acl); 2439 if (fhp == &tempfh) 2440 fh_put(&tempfh); 2441 return status; 2442 out_nfserr: 2443 status = nfserrno(err); 2444 goto out; 2445 out_resource: 2446 *countp = 0; 2447 status = nfserr_resource; 2448 goto out; 2449 out_serverfault: 2450 status = nfserr_serverfault; 2451 goto out; 2452 } 2453 2454 static inline int attributes_need_mount(u32 *bmval) 2455 { 2456 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2457 return 1; 2458 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2459 return 1; 2460 return 0; 2461 } 2462 2463 static __be32 2464 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2465 const char *name, int namlen, __be32 *p, int *buflen) 2466 { 2467 struct svc_export *exp = cd->rd_fhp->fh_export; 2468 struct dentry *dentry; 2469 __be32 nfserr; 2470 int ignore_crossmnt = 0; 2471 2472 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2473 if (IS_ERR(dentry)) 2474 return nfserrno(PTR_ERR(dentry)); 2475 if (!dentry->d_inode) { 2476 /* 2477 * nfsd_buffered_readdir drops the i_mutex between 2478 * readdir and calling this callback, leaving a window 2479 * where this directory entry could have gone away. 2480 */ 2481 dput(dentry); 2482 return nfserr_noent; 2483 } 2484 2485 exp_get(exp); 2486 /* 2487 * In the case of a mountpoint, the client may be asking for 2488 * attributes that are only properties of the underlying filesystem 2489 * as opposed to the cross-mounted file system. In such a case, 2490 * we will not follow the cross mount and will fill the attribtutes 2491 * directly from the mountpoint dentry. 2492 */ 2493 if (nfsd_mountpoint(dentry, exp)) { 2494 int err; 2495 2496 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2497 && !attributes_need_mount(cd->rd_bmval)) { 2498 ignore_crossmnt = 1; 2499 goto out_encode; 2500 } 2501 /* 2502 * Why the heck aren't we just using nfsd_lookup?? 2503 * Different "."/".." handling? Something else? 2504 * At least, add a comment here to explain.... 2505 */ 2506 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2507 if (err) { 2508 nfserr = nfserrno(err); 2509 goto out_put; 2510 } 2511 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2512 if (nfserr) 2513 goto out_put; 2514 2515 } 2516 out_encode: 2517 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2518 cd->rd_rqstp, ignore_crossmnt); 2519 out_put: 2520 dput(dentry); 2521 exp_put(exp); 2522 return nfserr; 2523 } 2524 2525 static __be32 * 2526 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2527 { 2528 __be32 *attrlenp; 2529 2530 if (buflen < 6) 2531 return NULL; 2532 *p++ = htonl(2); 2533 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2534 *p++ = htonl(0); /* bmval1 */ 2535 2536 attrlenp = p++; 2537 *p++ = nfserr; /* no htonl */ 2538 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2539 return p; 2540 } 2541 2542 static int 2543 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2544 loff_t offset, u64 ino, unsigned int d_type) 2545 { 2546 struct readdir_cd *ccd = ccdv; 2547 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2548 int buflen; 2549 __be32 *p = cd->buffer; 2550 __be32 *cookiep; 2551 __be32 nfserr = nfserr_toosmall; 2552 2553 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2554 if (name && isdotent(name, namlen)) { 2555 cd->common.err = nfs_ok; 2556 return 0; 2557 } 2558 2559 if (cd->offset) 2560 xdr_encode_hyper(cd->offset, (u64) offset); 2561 2562 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2563 if (buflen < 0) 2564 goto fail; 2565 2566 *p++ = xdr_one; /* mark entry present */ 2567 cookiep = p; 2568 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2569 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2570 2571 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2572 switch (nfserr) { 2573 case nfs_ok: 2574 p += buflen; 2575 break; 2576 case nfserr_resource: 2577 nfserr = nfserr_toosmall; 2578 goto fail; 2579 case nfserr_noent: 2580 goto skip_entry; 2581 default: 2582 /* 2583 * If the client requested the RDATTR_ERROR attribute, 2584 * we stuff the error code into this attribute 2585 * and continue. If this attribute was not requested, 2586 * then in accordance with the spec, we fail the 2587 * entire READDIR operation(!) 2588 */ 2589 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2590 goto fail; 2591 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2592 if (p == NULL) { 2593 nfserr = nfserr_toosmall; 2594 goto fail; 2595 } 2596 } 2597 cd->buflen -= (p - cd->buffer); 2598 cd->buffer = p; 2599 cd->offset = cookiep; 2600 skip_entry: 2601 cd->common.err = nfs_ok; 2602 return 0; 2603 fail: 2604 cd->common.err = nfserr; 2605 return -EINVAL; 2606 } 2607 2608 static void 2609 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2610 { 2611 __be32 *p; 2612 2613 RESERVE_SPACE(sizeof(stateid_t)); 2614 WRITE32(sid->si_generation); 2615 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2616 ADJUST_ARGS(); 2617 } 2618 2619 static __be32 2620 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2621 { 2622 __be32 *p; 2623 2624 if (!nfserr) { 2625 RESERVE_SPACE(8); 2626 WRITE32(access->ac_supported); 2627 WRITE32(access->ac_resp_access); 2628 ADJUST_ARGS(); 2629 } 2630 return nfserr; 2631 } 2632 2633 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) 2634 { 2635 __be32 *p; 2636 2637 if (!nfserr) { 2638 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); 2639 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2640 WRITE32(bcts->dir); 2641 /* Sorry, we do not yet support RDMA over 4.1: */ 2642 WRITE32(0); 2643 ADJUST_ARGS(); 2644 } 2645 return nfserr; 2646 } 2647 2648 static __be32 2649 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2650 { 2651 ENCODE_SEQID_OP_HEAD; 2652 2653 if (!nfserr) 2654 nfsd4_encode_stateid(resp, &close->cl_stateid); 2655 2656 encode_seqid_op_tail(resp, save, nfserr); 2657 return nfserr; 2658 } 2659 2660 2661 static __be32 2662 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2663 { 2664 __be32 *p; 2665 2666 if (!nfserr) { 2667 RESERVE_SPACE(NFS4_VERIFIER_SIZE); 2668 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE); 2669 ADJUST_ARGS(); 2670 } 2671 return nfserr; 2672 } 2673 2674 static __be32 2675 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2676 { 2677 __be32 *p; 2678 2679 if (!nfserr) { 2680 RESERVE_SPACE(32); 2681 write_cinfo(&p, &create->cr_cinfo); 2682 WRITE32(2); 2683 WRITE32(create->cr_bmval[0]); 2684 WRITE32(create->cr_bmval[1]); 2685 ADJUST_ARGS(); 2686 } 2687 return nfserr; 2688 } 2689 2690 static __be32 2691 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2692 { 2693 struct svc_fh *fhp = getattr->ga_fhp; 2694 int buflen; 2695 2696 if (nfserr) 2697 return nfserr; 2698 2699 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2700 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2701 resp->p, &buflen, getattr->ga_bmval, 2702 resp->rqstp, 0); 2703 if (!nfserr) 2704 resp->p += buflen; 2705 return nfserr; 2706 } 2707 2708 static __be32 2709 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2710 { 2711 struct svc_fh *fhp = *fhpp; 2712 unsigned int len; 2713 __be32 *p; 2714 2715 if (!nfserr) { 2716 len = fhp->fh_handle.fh_size; 2717 RESERVE_SPACE(len + 4); 2718 WRITE32(len); 2719 WRITEMEM(&fhp->fh_handle.fh_base, len); 2720 ADJUST_ARGS(); 2721 } 2722 return nfserr; 2723 } 2724 2725 /* 2726 * Including all fields other than the name, a LOCK4denied structure requires 2727 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2728 */ 2729 static void 2730 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2731 { 2732 struct xdr_netobj *conf = &ld->ld_owner; 2733 __be32 *p; 2734 2735 RESERVE_SPACE(32 + XDR_LEN(conf->len)); 2736 WRITE64(ld->ld_start); 2737 WRITE64(ld->ld_length); 2738 WRITE32(ld->ld_type); 2739 if (conf->len) { 2740 WRITEMEM(&ld->ld_clientid, 8); 2741 WRITE32(conf->len); 2742 WRITEMEM(conf->data, conf->len); 2743 kfree(conf->data); 2744 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2745 WRITE64((u64)0); /* clientid */ 2746 WRITE32(0); /* length of owner name */ 2747 } 2748 ADJUST_ARGS(); 2749 } 2750 2751 static __be32 2752 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2753 { 2754 ENCODE_SEQID_OP_HEAD; 2755 2756 if (!nfserr) 2757 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2758 else if (nfserr == nfserr_denied) 2759 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2760 2761 encode_seqid_op_tail(resp, save, nfserr); 2762 return nfserr; 2763 } 2764 2765 static __be32 2766 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2767 { 2768 if (nfserr == nfserr_denied) 2769 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2770 return nfserr; 2771 } 2772 2773 static __be32 2774 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2775 { 2776 ENCODE_SEQID_OP_HEAD; 2777 2778 if (!nfserr) 2779 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2780 2781 encode_seqid_op_tail(resp, save, nfserr); 2782 return nfserr; 2783 } 2784 2785 2786 static __be32 2787 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2788 { 2789 __be32 *p; 2790 2791 if (!nfserr) { 2792 RESERVE_SPACE(20); 2793 write_cinfo(&p, &link->li_cinfo); 2794 ADJUST_ARGS(); 2795 } 2796 return nfserr; 2797 } 2798 2799 2800 static __be32 2801 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2802 { 2803 __be32 *p; 2804 ENCODE_SEQID_OP_HEAD; 2805 2806 if (nfserr) 2807 goto out; 2808 2809 nfsd4_encode_stateid(resp, &open->op_stateid); 2810 RESERVE_SPACE(40); 2811 write_cinfo(&p, &open->op_cinfo); 2812 WRITE32(open->op_rflags); 2813 WRITE32(2); 2814 WRITE32(open->op_bmval[0]); 2815 WRITE32(open->op_bmval[1]); 2816 WRITE32(open->op_delegate_type); 2817 ADJUST_ARGS(); 2818 2819 switch (open->op_delegate_type) { 2820 case NFS4_OPEN_DELEGATE_NONE: 2821 break; 2822 case NFS4_OPEN_DELEGATE_READ: 2823 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2824 RESERVE_SPACE(20); 2825 WRITE32(open->op_recall); 2826 2827 /* 2828 * TODO: ACE's in delegations 2829 */ 2830 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2831 WRITE32(0); 2832 WRITE32(0); 2833 WRITE32(0); /* XXX: is NULL principal ok? */ 2834 ADJUST_ARGS(); 2835 break; 2836 case NFS4_OPEN_DELEGATE_WRITE: 2837 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2838 RESERVE_SPACE(32); 2839 WRITE32(0); 2840 2841 /* 2842 * TODO: space_limit's in delegations 2843 */ 2844 WRITE32(NFS4_LIMIT_SIZE); 2845 WRITE32(~(u32)0); 2846 WRITE32(~(u32)0); 2847 2848 /* 2849 * TODO: ACE's in delegations 2850 */ 2851 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2852 WRITE32(0); 2853 WRITE32(0); 2854 WRITE32(0); /* XXX: is NULL principal ok? */ 2855 ADJUST_ARGS(); 2856 break; 2857 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ 2858 switch (open->op_why_no_deleg) { 2859 case WND4_CONTENTION: 2860 case WND4_RESOURCE: 2861 RESERVE_SPACE(8); 2862 WRITE32(open->op_why_no_deleg); 2863 WRITE32(0); /* deleg signaling not supported yet */ 2864 break; 2865 default: 2866 RESERVE_SPACE(4); 2867 WRITE32(open->op_why_no_deleg); 2868 } 2869 ADJUST_ARGS(); 2870 break; 2871 default: 2872 BUG(); 2873 } 2874 /* XXX save filehandle here */ 2875 out: 2876 encode_seqid_op_tail(resp, save, nfserr); 2877 return nfserr; 2878 } 2879 2880 static __be32 2881 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2882 { 2883 ENCODE_SEQID_OP_HEAD; 2884 2885 if (!nfserr) 2886 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2887 2888 encode_seqid_op_tail(resp, save, nfserr); 2889 return nfserr; 2890 } 2891 2892 static __be32 2893 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2894 { 2895 ENCODE_SEQID_OP_HEAD; 2896 2897 if (!nfserr) 2898 nfsd4_encode_stateid(resp, &od->od_stateid); 2899 2900 encode_seqid_op_tail(resp, save, nfserr); 2901 return nfserr; 2902 } 2903 2904 static __be32 2905 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2906 struct nfsd4_read *read) 2907 { 2908 u32 eof; 2909 int v; 2910 struct page *page; 2911 unsigned long maxcount; 2912 long len; 2913 __be32 *p; 2914 2915 if (nfserr) 2916 return nfserr; 2917 if (resp->xbuf->page_len) 2918 return nfserr_resource; 2919 2920 RESERVE_SPACE(8); /* eof flag and byte count */ 2921 2922 maxcount = svc_max_payload(resp->rqstp); 2923 if (maxcount > read->rd_length) 2924 maxcount = read->rd_length; 2925 2926 len = maxcount; 2927 v = 0; 2928 while (len > 0) { 2929 page = *(resp->rqstp->rq_next_page); 2930 if (!page) { /* ran out of pages */ 2931 maxcount -= len; 2932 break; 2933 } 2934 resp->rqstp->rq_vec[v].iov_base = page_address(page); 2935 resp->rqstp->rq_vec[v].iov_len = 2936 len < PAGE_SIZE ? len : PAGE_SIZE; 2937 resp->rqstp->rq_next_page++; 2938 v++; 2939 len -= PAGE_SIZE; 2940 } 2941 read->rd_vlen = v; 2942 2943 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2944 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2945 &maxcount); 2946 2947 if (nfserr) 2948 return nfserr; 2949 eof = (read->rd_offset + maxcount >= 2950 read->rd_fhp->fh_dentry->d_inode->i_size); 2951 2952 WRITE32(eof); 2953 WRITE32(maxcount); 2954 ADJUST_ARGS(); 2955 resp->xbuf->head[0].iov_len = (char*)p 2956 - (char*)resp->xbuf->head[0].iov_base; 2957 resp->xbuf->page_len = maxcount; 2958 2959 /* Use rest of head for padding and remaining ops: */ 2960 resp->xbuf->tail[0].iov_base = p; 2961 resp->xbuf->tail[0].iov_len = 0; 2962 if (maxcount&3) { 2963 RESERVE_SPACE(4); 2964 WRITE32(0); 2965 resp->xbuf->tail[0].iov_base += maxcount&3; 2966 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2967 ADJUST_ARGS(); 2968 } 2969 return 0; 2970 } 2971 2972 static __be32 2973 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2974 { 2975 int maxcount; 2976 char *page; 2977 __be32 *p; 2978 2979 if (nfserr) 2980 return nfserr; 2981 if (resp->xbuf->page_len) 2982 return nfserr_resource; 2983 if (!*resp->rqstp->rq_next_page) 2984 return nfserr_resource; 2985 2986 page = page_address(*(resp->rqstp->rq_next_page++)); 2987 2988 maxcount = PAGE_SIZE; 2989 RESERVE_SPACE(4); 2990 2991 /* 2992 * XXX: By default, the ->readlink() VFS op will truncate symlinks 2993 * if they would overflow the buffer. Is this kosher in NFSv4? If 2994 * not, one easy fix is: if ->readlink() precisely fills the buffer, 2995 * assume that truncation occurred, and return NFS4ERR_RESOURCE. 2996 */ 2997 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2998 if (nfserr == nfserr_isdir) 2999 return nfserr_inval; 3000 if (nfserr) 3001 return nfserr; 3002 3003 WRITE32(maxcount); 3004 ADJUST_ARGS(); 3005 resp->xbuf->head[0].iov_len = (char*)p 3006 - (char*)resp->xbuf->head[0].iov_base; 3007 resp->xbuf->page_len = maxcount; 3008 3009 /* Use rest of head for padding and remaining ops: */ 3010 resp->xbuf->tail[0].iov_base = p; 3011 resp->xbuf->tail[0].iov_len = 0; 3012 if (maxcount&3) { 3013 RESERVE_SPACE(4); 3014 WRITE32(0); 3015 resp->xbuf->tail[0].iov_base += maxcount&3; 3016 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 3017 ADJUST_ARGS(); 3018 } 3019 return 0; 3020 } 3021 3022 static __be32 3023 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 3024 { 3025 int maxcount; 3026 loff_t offset; 3027 __be32 *page, *savep, *tailbase; 3028 __be32 *p; 3029 3030 if (nfserr) 3031 return nfserr; 3032 if (resp->xbuf->page_len) 3033 return nfserr_resource; 3034 if (!*resp->rqstp->rq_next_page) 3035 return nfserr_resource; 3036 3037 RESERVE_SPACE(NFS4_VERIFIER_SIZE); 3038 savep = p; 3039 3040 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ 3041 WRITE32(0); 3042 WRITE32(0); 3043 ADJUST_ARGS(); 3044 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 3045 tailbase = p; 3046 3047 maxcount = PAGE_SIZE; 3048 if (maxcount > readdir->rd_maxcount) 3049 maxcount = readdir->rd_maxcount; 3050 3051 /* 3052 * Convert from bytes to words, account for the two words already 3053 * written, make sure to leave two words at the end for the next 3054 * pointer and eof field. 3055 */ 3056 maxcount = (maxcount >> 2) - 4; 3057 if (maxcount < 0) { 3058 nfserr = nfserr_toosmall; 3059 goto err_no_verf; 3060 } 3061 3062 page = page_address(*(resp->rqstp->rq_next_page++)); 3063 readdir->common.err = 0; 3064 readdir->buflen = maxcount; 3065 readdir->buffer = page; 3066 readdir->offset = NULL; 3067 3068 offset = readdir->rd_cookie; 3069 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 3070 &offset, 3071 &readdir->common, nfsd4_encode_dirent); 3072 if (nfserr == nfs_ok && 3073 readdir->common.err == nfserr_toosmall && 3074 readdir->buffer == page) 3075 nfserr = nfserr_toosmall; 3076 if (nfserr) 3077 goto err_no_verf; 3078 3079 if (readdir->offset) 3080 xdr_encode_hyper(readdir->offset, offset); 3081 3082 p = readdir->buffer; 3083 *p++ = 0; /* no more entries */ 3084 *p++ = htonl(readdir->common.err == nfserr_eof); 3085 resp->xbuf->page_len = ((char*)p) - 3086 (char*)page_address(*(resp->rqstp->rq_next_page-1)); 3087 3088 /* Use rest of head for padding and remaining ops: */ 3089 resp->xbuf->tail[0].iov_base = tailbase; 3090 resp->xbuf->tail[0].iov_len = 0; 3091 resp->p = resp->xbuf->tail[0].iov_base; 3092 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 3093 3094 return 0; 3095 err_no_verf: 3096 p = savep; 3097 ADJUST_ARGS(); 3098 return nfserr; 3099 } 3100 3101 static __be32 3102 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 3103 { 3104 __be32 *p; 3105 3106 if (!nfserr) { 3107 RESERVE_SPACE(20); 3108 write_cinfo(&p, &remove->rm_cinfo); 3109 ADJUST_ARGS(); 3110 } 3111 return nfserr; 3112 } 3113 3114 static __be32 3115 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 3116 { 3117 __be32 *p; 3118 3119 if (!nfserr) { 3120 RESERVE_SPACE(40); 3121 write_cinfo(&p, &rename->rn_sinfo); 3122 write_cinfo(&p, &rename->rn_tinfo); 3123 ADJUST_ARGS(); 3124 } 3125 return nfserr; 3126 } 3127 3128 static __be32 3129 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, 3130 __be32 nfserr,struct svc_export *exp) 3131 { 3132 int i = 0; 3133 u32 nflavs; 3134 struct exp_flavor_info *flavs; 3135 struct exp_flavor_info def_flavs[2]; 3136 __be32 *p; 3137 3138 if (nfserr) 3139 goto out; 3140 if (exp->ex_nflavors) { 3141 flavs = exp->ex_flavors; 3142 nflavs = exp->ex_nflavors; 3143 } else { /* Handling of some defaults in absence of real secinfo: */ 3144 flavs = def_flavs; 3145 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 3146 nflavs = 2; 3147 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 3148 flavs[1].pseudoflavor = RPC_AUTH_NULL; 3149 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 3150 nflavs = 1; 3151 flavs[0].pseudoflavor 3152 = svcauth_gss_flavor(exp->ex_client); 3153 } else { 3154 nflavs = 1; 3155 flavs[0].pseudoflavor 3156 = exp->ex_client->flavour->flavour; 3157 } 3158 } 3159 3160 RESERVE_SPACE(4); 3161 WRITE32(nflavs); 3162 ADJUST_ARGS(); 3163 for (i = 0; i < nflavs; i++) { 3164 u32 flav = flavs[i].pseudoflavor; 3165 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 3166 3167 if (gm) { 3168 RESERVE_SPACE(4); 3169 WRITE32(RPC_AUTH_GSS); 3170 ADJUST_ARGS(); 3171 RESERVE_SPACE(4 + gm->gm_oid.len); 3172 WRITE32(gm->gm_oid.len); 3173 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 3174 ADJUST_ARGS(); 3175 RESERVE_SPACE(4); 3176 WRITE32(0); /* qop */ 3177 ADJUST_ARGS(); 3178 RESERVE_SPACE(4); 3179 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 3180 ADJUST_ARGS(); 3181 gss_mech_put(gm); 3182 } else { 3183 RESERVE_SPACE(4); 3184 WRITE32(flav); 3185 ADJUST_ARGS(); 3186 } 3187 } 3188 out: 3189 if (exp) 3190 exp_put(exp); 3191 return nfserr; 3192 } 3193 3194 static __be32 3195 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 3196 struct nfsd4_secinfo *secinfo) 3197 { 3198 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); 3199 } 3200 3201 static __be32 3202 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, 3203 struct nfsd4_secinfo_no_name *secinfo) 3204 { 3205 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); 3206 } 3207 3208 /* 3209 * The SETATTR encode routine is special -- it always encodes a bitmap, 3210 * regardless of the error status. 3211 */ 3212 static __be32 3213 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 3214 { 3215 __be32 *p; 3216 3217 RESERVE_SPACE(12); 3218 if (nfserr) { 3219 WRITE32(2); 3220 WRITE32(0); 3221 WRITE32(0); 3222 } 3223 else { 3224 WRITE32(2); 3225 WRITE32(setattr->sa_bmval[0]); 3226 WRITE32(setattr->sa_bmval[1]); 3227 } 3228 ADJUST_ARGS(); 3229 return nfserr; 3230 } 3231 3232 static __be32 3233 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 3234 { 3235 __be32 *p; 3236 3237 if (!nfserr) { 3238 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE); 3239 WRITEMEM(&scd->se_clientid, 8); 3240 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE); 3241 ADJUST_ARGS(); 3242 } 3243 else if (nfserr == nfserr_clid_inuse) { 3244 RESERVE_SPACE(8); 3245 WRITE32(0); 3246 WRITE32(0); 3247 ADJUST_ARGS(); 3248 } 3249 return nfserr; 3250 } 3251 3252 static __be32 3253 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 3254 { 3255 __be32 *p; 3256 3257 if (!nfserr) { 3258 RESERVE_SPACE(16); 3259 WRITE32(write->wr_bytes_written); 3260 WRITE32(write->wr_how_written); 3261 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE); 3262 ADJUST_ARGS(); 3263 } 3264 return nfserr; 3265 } 3266 3267 static __be32 3268 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, 3269 struct nfsd4_exchange_id *exid) 3270 { 3271 __be32 *p; 3272 char *major_id; 3273 char *server_scope; 3274 int major_id_sz; 3275 int server_scope_sz; 3276 uint64_t minor_id = 0; 3277 3278 if (nfserr) 3279 return nfserr; 3280 3281 major_id = utsname()->nodename; 3282 major_id_sz = strlen(major_id); 3283 server_scope = utsname()->nodename; 3284 server_scope_sz = strlen(server_scope); 3285 3286 RESERVE_SPACE( 3287 8 /* eir_clientid */ + 3288 4 /* eir_sequenceid */ + 3289 4 /* eir_flags */ + 3290 4 /* spr_how (SP4_NONE) */ + 3291 8 /* so_minor_id */ + 3292 4 /* so_major_id.len */ + 3293 (XDR_QUADLEN(major_id_sz) * 4) + 3294 4 /* eir_server_scope.len */ + 3295 (XDR_QUADLEN(server_scope_sz) * 4) + 3296 4 /* eir_server_impl_id.count (0) */); 3297 3298 WRITEMEM(&exid->clientid, 8); 3299 WRITE32(exid->seqid); 3300 WRITE32(exid->flags); 3301 3302 /* state_protect4_r. Currently only support SP4_NONE */ 3303 BUG_ON(exid->spa_how != SP4_NONE); 3304 WRITE32(exid->spa_how); 3305 3306 /* The server_owner struct */ 3307 WRITE64(minor_id); /* Minor id */ 3308 /* major id */ 3309 WRITE32(major_id_sz); 3310 WRITEMEM(major_id, major_id_sz); 3311 3312 /* Server scope */ 3313 WRITE32(server_scope_sz); 3314 WRITEMEM(server_scope, server_scope_sz); 3315 3316 /* Implementation id */ 3317 WRITE32(0); /* zero length nfs_impl_id4 array */ 3318 ADJUST_ARGS(); 3319 return 0; 3320 } 3321 3322 static __be32 3323 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3324 struct nfsd4_create_session *sess) 3325 { 3326 __be32 *p; 3327 3328 if (nfserr) 3329 return nfserr; 3330 3331 RESERVE_SPACE(24); 3332 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3333 WRITE32(sess->seqid); 3334 WRITE32(sess->flags); 3335 ADJUST_ARGS(); 3336 3337 RESERVE_SPACE(28); 3338 WRITE32(0); /* headerpadsz */ 3339 WRITE32(sess->fore_channel.maxreq_sz); 3340 WRITE32(sess->fore_channel.maxresp_sz); 3341 WRITE32(sess->fore_channel.maxresp_cached); 3342 WRITE32(sess->fore_channel.maxops); 3343 WRITE32(sess->fore_channel.maxreqs); 3344 WRITE32(sess->fore_channel.nr_rdma_attrs); 3345 ADJUST_ARGS(); 3346 3347 if (sess->fore_channel.nr_rdma_attrs) { 3348 RESERVE_SPACE(4); 3349 WRITE32(sess->fore_channel.rdma_attrs); 3350 ADJUST_ARGS(); 3351 } 3352 3353 RESERVE_SPACE(28); 3354 WRITE32(0); /* headerpadsz */ 3355 WRITE32(sess->back_channel.maxreq_sz); 3356 WRITE32(sess->back_channel.maxresp_sz); 3357 WRITE32(sess->back_channel.maxresp_cached); 3358 WRITE32(sess->back_channel.maxops); 3359 WRITE32(sess->back_channel.maxreqs); 3360 WRITE32(sess->back_channel.nr_rdma_attrs); 3361 ADJUST_ARGS(); 3362 3363 if (sess->back_channel.nr_rdma_attrs) { 3364 RESERVE_SPACE(4); 3365 WRITE32(sess->back_channel.rdma_attrs); 3366 ADJUST_ARGS(); 3367 } 3368 return 0; 3369 } 3370 3371 static __be32 3372 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr, 3373 struct nfsd4_destroy_session *destroy_session) 3374 { 3375 return nfserr; 3376 } 3377 3378 static __be32 3379 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 3380 struct nfsd4_free_stateid *free_stateid) 3381 { 3382 __be32 *p; 3383 3384 if (nfserr) 3385 return nfserr; 3386 3387 RESERVE_SPACE(4); 3388 *p++ = nfserr; 3389 ADJUST_ARGS(); 3390 return nfserr; 3391 } 3392 3393 static __be32 3394 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, 3395 struct nfsd4_sequence *seq) 3396 { 3397 __be32 *p; 3398 3399 if (nfserr) 3400 return nfserr; 3401 3402 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3403 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3404 WRITE32(seq->seqid); 3405 WRITE32(seq->slotid); 3406 /* Note slotid's are numbered from zero: */ 3407 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ 3408 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ 3409 WRITE32(seq->status_flags); 3410 3411 ADJUST_ARGS(); 3412 resp->cstate.datap = p; /* DRC cache data pointer */ 3413 return 0; 3414 } 3415 3416 static __be32 3417 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, 3418 struct nfsd4_test_stateid *test_stateid) 3419 { 3420 struct nfsd4_test_stateid_id *stateid, *next; 3421 __be32 *p; 3422 3423 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids)); 3424 *p++ = htonl(test_stateid->ts_num_ids); 3425 3426 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { 3427 *p++ = stateid->ts_id_status; 3428 } 3429 3430 ADJUST_ARGS(); 3431 return nfserr; 3432 } 3433 3434 static __be32 3435 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3436 { 3437 return nfserr; 3438 } 3439 3440 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3441 3442 /* 3443 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3444 * since we don't need to filter out obsolete ops as this is 3445 * done in the decoding phase. 3446 */ 3447 static nfsd4_enc nfsd4_enc_ops[] = { 3448 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3449 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3450 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3451 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3452 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3453 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3454 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3455 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3456 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3457 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3458 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3459 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3460 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3461 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3462 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3463 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3464 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3465 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3466 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3467 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3468 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3469 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3470 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3471 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3472 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3473 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3474 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3475 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3476 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3477 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3478 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3479 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3480 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3481 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3482 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3483 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3484 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3485 3486 /* NFSv4.1 operations */ 3487 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3488 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, 3489 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3490 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3491 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3492 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, 3493 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3494 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3495 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3496 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3497 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3498 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3499 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, 3500 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3501 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3502 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, 3503 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3504 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3505 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3506 }; 3507 3508 /* 3509 * Calculate the total amount of memory that the compound response has taken 3510 * after encoding the current operation with pad. 3511 * 3512 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() 3513 * which was specified at nfsd4_operation, else pad is zero. 3514 * 3515 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. 3516 * 3517 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3518 * will be at least a page and will therefore hold the xdr_buf head. 3519 */ 3520 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) 3521 { 3522 struct xdr_buf *xb = &resp->rqstp->rq_res; 3523 struct nfsd4_session *session = NULL; 3524 struct nfsd4_slot *slot = resp->cstate.slot; 3525 u32 length, tlen = 0; 3526 3527 if (!nfsd4_has_session(&resp->cstate)) 3528 return 0; 3529 3530 session = resp->cstate.session; 3531 if (session == NULL) 3532 return 0; 3533 3534 if (xb->page_len == 0) { 3535 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3536 } else { 3537 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3538 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3539 3540 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3541 } 3542 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3543 length, xb->page_len, tlen, pad); 3544 3545 if (length > session->se_fchannel.maxresp_sz) 3546 return nfserr_rep_too_big; 3547 3548 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) && 3549 length > session->se_fchannel.maxresp_cached) 3550 return nfserr_rep_too_big_to_cache; 3551 3552 return 0; 3553 } 3554 3555 void 3556 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3557 { 3558 __be32 *statp; 3559 __be32 *p; 3560 3561 RESERVE_SPACE(8); 3562 WRITE32(op->opnum); 3563 statp = p++; /* to be backfilled at the end */ 3564 ADJUST_ARGS(); 3565 3566 if (op->opnum == OP_ILLEGAL) 3567 goto status; 3568 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3569 !nfsd4_enc_ops[op->opnum]); 3570 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3571 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3572 if (!op->status) 3573 op->status = nfsd4_check_resp_size(resp, 0); 3574 status: 3575 /* 3576 * Note: We write the status directly, instead of using WRITE32(), 3577 * since it is already in network byte order. 3578 */ 3579 *statp = op->status; 3580 } 3581 3582 /* 3583 * Encode the reply stored in the stateowner reply cache 3584 * 3585 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3586 * previously sent already encoded operation. 3587 * 3588 * called with nfs4_lock_state() held 3589 */ 3590 void 3591 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3592 { 3593 __be32 *p; 3594 struct nfs4_replay *rp = op->replay; 3595 3596 BUG_ON(!rp); 3597 3598 RESERVE_SPACE(8); 3599 WRITE32(op->opnum); 3600 *p++ = rp->rp_status; /* already xdr'ed */ 3601 ADJUST_ARGS(); 3602 3603 RESERVE_SPACE(rp->rp_buflen); 3604 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3605 ADJUST_ARGS(); 3606 } 3607 3608 int 3609 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3610 { 3611 return xdr_ressize_check(rqstp, p); 3612 } 3613 3614 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) 3615 { 3616 struct svc_rqst *rqstp = rq; 3617 struct nfsd4_compoundargs *args = rqstp->rq_argp; 3618 3619 if (args->ops != args->iops) { 3620 kfree(args->ops); 3621 args->ops = args->iops; 3622 } 3623 kfree(args->tmpp); 3624 args->tmpp = NULL; 3625 while (args->to_free) { 3626 struct tmpbuf *tb = args->to_free; 3627 args->to_free = tb->next; 3628 tb->release(tb->buf); 3629 kfree(tb); 3630 } 3631 return 1; 3632 } 3633 3634 int 3635 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3636 { 3637 args->p = p; 3638 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3639 args->pagelist = rqstp->rq_arg.pages; 3640 args->pagelen = rqstp->rq_arg.page_len; 3641 args->tmpp = NULL; 3642 args->to_free = NULL; 3643 args->ops = args->iops; 3644 args->rqstp = rqstp; 3645 3646 return !nfsd4_decode_compound(args); 3647 } 3648 3649 int 3650 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3651 { 3652 /* 3653 * All that remains is to write the tag and operation count... 3654 */ 3655 struct nfsd4_compound_state *cs = &resp->cstate; 3656 struct kvec *iov; 3657 p = resp->tagp; 3658 *p++ = htonl(resp->taglen); 3659 memcpy(p, resp->tag, resp->taglen); 3660 p += XDR_QUADLEN(resp->taglen); 3661 *p++ = htonl(resp->opcnt); 3662 3663 if (rqstp->rq_res.page_len) 3664 iov = &rqstp->rq_res.tail[0]; 3665 else 3666 iov = &rqstp->rq_res.head[0]; 3667 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3668 BUG_ON(iov->iov_len > PAGE_SIZE); 3669 if (nfsd4_has_session(cs)) { 3670 if (cs->status != nfserr_replay_cache) { 3671 nfsd4_store_cache_entry(resp); 3672 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; 3673 } 3674 /* Renew the clientid on success and on replay */ 3675 release_session_client(cs->session); 3676 nfsd4_put_session(cs->session); 3677 } 3678 return 1; 3679 } 3680 3681 /* 3682 * Local variables: 3683 * c-basic-offset: 8 3684 * End: 3685 */ 3686