1/* 2 * Copyright (c) 2000-2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29/* 30 * Copyright (c) 1989, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * This code is derived from software contributed to Berkeley by 34 * Rick Macklem at The University of Guelph. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 65 * FreeBSD-Id: nfs_subs.c,v 1.47 1997/11/07 08:53:24 phk Exp $ 66 */ 67 68/* 69 * These functions support the macros and help fiddle mbuf chains for 70 * the nfs op functions. They do things like create the rpc header and 71 * copy data between mbuf chains and uio lists. 72 */ 73#include <sys/param.h> 74#include <sys/proc.h> 75#include <sys/kauth.h> 76#include <sys/systm.h> 77#include <sys/kernel.h> 78#include <sys/mount_internal.h> 79#include <sys/vnode_internal.h> 80#include <sys/kpi_mbuf.h> 81#include <sys/socket.h> 82#include <sys/stat.h> 83#include <sys/malloc.h> 84#include <sys/syscall.h> 85#include <sys/ubc_internal.h> 86#include <sys/fcntl.h> 87#include <sys/uio.h> 88#include <sys/domain.h> 89#include <libkern/OSAtomic.h> 90#include <kern/thread_call.h> 91 92#include <sys/vm.h> 93#include <sys/vmparam.h> 94 95#include <sys/time.h> 96#include <kern/clock.h> 97 98#include <nfs/rpcv2.h> 99#include <nfs/nfsproto.h> 100#include <nfs/nfs.h> 101#include <nfs/nfsnode.h> 102#if NFSCLIENT 103#define _NFS_XDR_SUBS_FUNCS_ /* define this to get xdrbuf function definitions */ 104#endif 105#include <nfs/xdr_subs.h> 106#include <nfs/nfsm_subs.h> 107#include <nfs/nfs_gss.h> 108#include <nfs/nfsmount.h> 109#include <nfs/nfs_lock.h> 110 111#include <miscfs/specfs/specdev.h> 112 113#include <netinet/in.h> 114#include <net/kpi_interface.h> 115 116#include <sys/utfconv.h> 117 118/* 119 * NFS globals 120 */ 121struct nfsstats __attribute__((aligned(8))) nfsstats; 122size_t nfs_mbuf_mhlen = 0, nfs_mbuf_minclsize = 0; 123 124/* 125 * functions to convert between NFS and VFS types 126 */ 127nfstype 128vtonfs_type(enum vtype vtype, int nfsvers) 129{ 130 switch (vtype) { 131 case VNON: 132 return NFNON; 133 case VREG: 134 return NFREG; 135 case VDIR: 136 return NFDIR; 137 case VBLK: 138 return NFBLK; 139 case VCHR: 140 return NFCHR; 141 case VLNK: 142 return NFLNK; 143 case VSOCK: 144 if (nfsvers > NFS_VER2) 145 return NFSOCK; 146 case VFIFO: 147 if (nfsvers > NFS_VER2) 148 return NFFIFO; 149 case VBAD: 150 case VSTR: 151 case VCPLX: 152 default: 153 return NFNON; 154 } 155} 156 157enum vtype 158nfstov_type(nfstype nvtype, int nfsvers) 159{ 160 switch (nvtype) { 161 case NFNON: 162 return VNON; 163 case NFREG: 164 return VREG; 165 case NFDIR: 166 return VDIR; 167 case NFBLK: 168 return VBLK; 169 case NFCHR: 170 return VCHR; 171 case NFLNK: 172 return VLNK; 173 case NFSOCK: 174 if (nfsvers > NFS_VER2) 175 return VSOCK; 176 case NFFIFO: 177 if (nfsvers > NFS_VER2) 178 return VFIFO; 179 case NFATTRDIR: 180 if (nfsvers > NFS_VER3) 181 return VDIR; 182 case NFNAMEDATTR: 183 if (nfsvers > NFS_VER3) 184 return VREG; 185 default: 186 return VNON; 187 } 188} 189 190int 191vtonfsv2_mode(enum vtype vtype, mode_t m) 192{ 193 switch (vtype) { 194 case VNON: 195 case VREG: 196 case VDIR: 197 case VBLK: 198 case VCHR: 199 case VLNK: 200 case VSOCK: 201 return vnode_makeimode(vtype, m); 202 case VFIFO: 203 return vnode_makeimode(VCHR, m); 204 case VBAD: 205 case VSTR: 206 case VCPLX: 207 default: 208 return vnode_makeimode(VNON, m); 209 } 210} 211 212#if NFSSERVER 213 214/* 215 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 216 */ 217int nfsv3_procid[NFS_NPROCS] = { 218 NFSPROC_NULL, 219 NFSPROC_GETATTR, 220 NFSPROC_SETATTR, 221 NFSPROC_NOOP, 222 NFSPROC_LOOKUP, 223 NFSPROC_READLINK, 224 NFSPROC_READ, 225 NFSPROC_NOOP, 226 NFSPROC_WRITE, 227 NFSPROC_CREATE, 228 NFSPROC_REMOVE, 229 NFSPROC_RENAME, 230 NFSPROC_LINK, 231 NFSPROC_SYMLINK, 232 NFSPROC_MKDIR, 233 NFSPROC_RMDIR, 234 NFSPROC_READDIR, 235 NFSPROC_FSSTAT, 236 NFSPROC_NOOP, 237 NFSPROC_NOOP, 238 NFSPROC_NOOP, 239 NFSPROC_NOOP, 240 NFSPROC_NOOP 241}; 242 243#endif /* NFSSERVER */ 244 245/* 246 * and the reverse mapping from generic to Version 2 procedure numbers 247 */ 248int nfsv2_procid[NFS_NPROCS] = { 249 NFSV2PROC_NULL, 250 NFSV2PROC_GETATTR, 251 NFSV2PROC_SETATTR, 252 NFSV2PROC_LOOKUP, 253 NFSV2PROC_NOOP, 254 NFSV2PROC_READLINK, 255 NFSV2PROC_READ, 256 NFSV2PROC_WRITE, 257 NFSV2PROC_CREATE, 258 NFSV2PROC_MKDIR, 259 NFSV2PROC_SYMLINK, 260 NFSV2PROC_CREATE, 261 NFSV2PROC_REMOVE, 262 NFSV2PROC_RMDIR, 263 NFSV2PROC_RENAME, 264 NFSV2PROC_LINK, 265 NFSV2PROC_READDIR, 266 NFSV2PROC_NOOP, 267 NFSV2PROC_STATFS, 268 NFSV2PROC_NOOP, 269 NFSV2PROC_NOOP, 270 NFSV2PROC_NOOP, 271 NFSV2PROC_NOOP 272}; 273 274 275/* 276 * initialize NFS's cache of mbuf constants 277 */ 278void 279nfs_mbuf_init(void) 280{ 281 struct mbuf_stat ms; 282 283 mbuf_stats(&ms); 284 nfs_mbuf_mhlen = ms.mhlen; 285 nfs_mbuf_minclsize = ms.minclsize; 286} 287 288#if NFSSERVER 289 290/* 291 * allocate a list of mbufs to hold the given amount of data 292 */ 293int 294nfsm_mbuf_get_list(size_t size, mbuf_t *mp, int *mbcnt) 295{ 296 int error, cnt; 297 mbuf_t mhead, mlast, m; 298 size_t len, mlen; 299 300 error = cnt = 0; 301 mhead = mlast = NULL; 302 len = 0; 303 304 while (len < size) { 305 nfsm_mbuf_get(error, &m, (size - len)); 306 if (error) 307 break; 308 if (!mhead) 309 mhead = m; 310 if (mlast && ((error = mbuf_setnext(mlast, m)))) { 311 mbuf_free(m); 312 break; 313 } 314 mlen = mbuf_maxlen(m); 315 if ((len + mlen) > size) 316 mlen = size - len; 317 mbuf_setlen(m, mlen); 318 len += mlen; 319 cnt++; 320 mlast = m; 321 } 322 323 if (!error) { 324 *mp = mhead; 325 *mbcnt = cnt; 326 } 327 return (error); 328} 329 330#endif /* NFSSERVER */ 331 332/* 333 * nfsm_chain_new_mbuf() 334 * 335 * Add a new mbuf to the given chain. 336 */ 337int 338nfsm_chain_new_mbuf(struct nfsm_chain *nmc, size_t sizehint) 339{ 340 mbuf_t mb; 341 int error = 0; 342 343 if (nmc->nmc_flags & NFSM_CHAIN_FLAG_ADD_CLUSTERS) 344 sizehint = nfs_mbuf_minclsize; 345 346 /* allocate a new mbuf */ 347 nfsm_mbuf_get(error, &mb, sizehint); 348 if (error) 349 return (error); 350 if (mb == NULL) 351 panic("got NULL mbuf?"); 352 353 /* do we have a current mbuf? */ 354 if (nmc->nmc_mcur) { 355 /* first cap off current mbuf */ 356 mbuf_setlen(nmc->nmc_mcur, nmc->nmc_ptr - (caddr_t)mbuf_data(nmc->nmc_mcur)); 357 /* then append the new mbuf */ 358 error = mbuf_setnext(nmc->nmc_mcur, mb); 359 if (error) { 360 mbuf_free(mb); 361 return (error); 362 } 363 } 364 365 /* set up for using the new mbuf */ 366 nmc->nmc_mcur = mb; 367 nmc->nmc_ptr = mbuf_data(mb); 368 nmc->nmc_left = mbuf_trailingspace(mb); 369 370 return (0); 371} 372 373/* 374 * nfsm_chain_add_opaque_f() 375 * 376 * Add "len" bytes of opaque data pointed to by "buf" to the given chain. 377 */ 378int 379nfsm_chain_add_opaque_f(struct nfsm_chain *nmc, const u_char *buf, uint32_t len) 380{ 381 uint32_t paddedlen, tlen; 382 int error; 383 384 paddedlen = nfsm_rndup(len); 385 386 while (paddedlen) { 387 if (!nmc->nmc_left) { 388 error = nfsm_chain_new_mbuf(nmc, paddedlen); 389 if (error) 390 return (error); 391 } 392 tlen = MIN(nmc->nmc_left, paddedlen); 393 if (tlen) { 394 if (len) { 395 if (tlen > len) 396 tlen = len; 397 bcopy(buf, nmc->nmc_ptr, tlen); 398 } else { 399 bzero(nmc->nmc_ptr, tlen); 400 } 401 nmc->nmc_ptr += tlen; 402 nmc->nmc_left -= tlen; 403 paddedlen -= tlen; 404 if (len) { 405 buf += tlen; 406 len -= tlen; 407 } 408 } 409 } 410 return (0); 411} 412 413/* 414 * nfsm_chain_add_opaque_nopad_f() 415 * 416 * Add "len" bytes of opaque data pointed to by "buf" to the given chain. 417 * Do not XDR pad. 418 */ 419int 420nfsm_chain_add_opaque_nopad_f(struct nfsm_chain *nmc, const u_char *buf, uint32_t len) 421{ 422 uint32_t tlen; 423 int error; 424 425 while (len > 0) { 426 if (nmc->nmc_left <= 0) { 427 error = nfsm_chain_new_mbuf(nmc, len); 428 if (error) 429 return (error); 430 } 431 tlen = MIN(nmc->nmc_left, len); 432 bcopy(buf, nmc->nmc_ptr, tlen); 433 nmc->nmc_ptr += tlen; 434 nmc->nmc_left -= tlen; 435 len -= tlen; 436 buf += tlen; 437 } 438 return (0); 439} 440 441/* 442 * nfsm_chain_add_uio() 443 * 444 * Add "len" bytes of data from "uio" to the given chain. 445 */ 446int 447nfsm_chain_add_uio(struct nfsm_chain *nmc, uio_t uio, uint32_t len) 448{ 449 uint32_t paddedlen, tlen; 450 int error; 451 452 paddedlen = nfsm_rndup(len); 453 454 while (paddedlen) { 455 if (!nmc->nmc_left) { 456 error = nfsm_chain_new_mbuf(nmc, paddedlen); 457 if (error) 458 return (error); 459 } 460 tlen = MIN(nmc->nmc_left, paddedlen); 461 if (tlen) { 462 if (len) { 463 if (tlen > len) 464 tlen = len; 465 uiomove(nmc->nmc_ptr, tlen, uio); 466 } else { 467 bzero(nmc->nmc_ptr, tlen); 468 } 469 nmc->nmc_ptr += tlen; 470 nmc->nmc_left -= tlen; 471 paddedlen -= tlen; 472 if (len) 473 len -= tlen; 474 } 475 } 476 return (0); 477} 478 479/* 480 * Find the length of the NFS mbuf chain 481 * up to the current encoding/decoding offset. 482 */ 483int 484nfsm_chain_offset(struct nfsm_chain *nmc) 485{ 486 mbuf_t mb; 487 int len = 0; 488 489 for (mb = nmc->nmc_mhead; mb; mb = mbuf_next(mb)) { 490 if (mb == nmc->nmc_mcur) 491 return (len + (nmc->nmc_ptr - (caddr_t) mbuf_data(mb))); 492 len += mbuf_len(mb); 493 } 494 495 return (len); 496} 497 498/* 499 * nfsm_chain_advance() 500 * 501 * Advance an nfsm_chain by "len" bytes. 502 */ 503int 504nfsm_chain_advance(struct nfsm_chain *nmc, uint32_t len) 505{ 506 mbuf_t mb; 507 508 while (len) { 509 if (nmc->nmc_left >= len) { 510 nmc->nmc_left -= len; 511 nmc->nmc_ptr += len; 512 return (0); 513 } 514 len -= nmc->nmc_left; 515 nmc->nmc_mcur = mb = mbuf_next(nmc->nmc_mcur); 516 if (!mb) 517 return (EBADRPC); 518 nmc->nmc_ptr = mbuf_data(mb); 519 nmc->nmc_left = mbuf_len(mb); 520 } 521 522 return (0); 523} 524 525/* 526 * nfsm_chain_reverse() 527 * 528 * Reverse decode offset in an nfsm_chain by "len" bytes. 529 */ 530int 531nfsm_chain_reverse(struct nfsm_chain *nmc, uint32_t len) 532{ 533 uint32_t mlen, new_offset; 534 int error = 0; 535 536 mlen = nmc->nmc_ptr - (caddr_t) mbuf_data(nmc->nmc_mcur); 537 if (len <= mlen) { 538 nmc->nmc_ptr -= len; 539 nmc->nmc_left += len; 540 return (0); 541 } 542 543 new_offset = nfsm_chain_offset(nmc) - len; 544 nfsm_chain_dissect_init(error, nmc, nmc->nmc_mhead); 545 if (error) 546 return (error); 547 548 return (nfsm_chain_advance(nmc, new_offset)); 549} 550 551/* 552 * nfsm_chain_get_opaque_pointer_f() 553 * 554 * Return a pointer to the next "len" bytes of contiguous data in 555 * the mbuf chain. If the next "len" bytes are not contiguous, we 556 * try to manipulate the mbuf chain so that it is. 557 * 558 * The nfsm_chain is advanced by nfsm_rndup("len") bytes. 559 */ 560int 561nfsm_chain_get_opaque_pointer_f(struct nfsm_chain *nmc, uint32_t len, u_char **pptr) 562{ 563 mbuf_t mbcur, mb; 564 uint32_t left, need, mblen, cplen, padlen; 565 u_char *ptr; 566 int error = 0; 567 568 /* move to next mbuf with data */ 569 while (nmc->nmc_mcur && (nmc->nmc_left == 0)) { 570 mb = mbuf_next(nmc->nmc_mcur); 571 nmc->nmc_mcur = mb; 572 if (!mb) 573 break; 574 nmc->nmc_ptr = mbuf_data(mb); 575 nmc->nmc_left = mbuf_len(mb); 576 } 577 /* check if we've run out of data */ 578 if (!nmc->nmc_mcur) 579 return (EBADRPC); 580 581 /* do we already have a contiguous buffer? */ 582 if (nmc->nmc_left >= len) { 583 /* the returned pointer will be the current pointer */ 584 *pptr = (u_char*)nmc->nmc_ptr; 585 error = nfsm_chain_advance(nmc, nfsm_rndup(len)); 586 return (error); 587 } 588 589 padlen = nfsm_rndup(len) - len; 590 591 /* we need (len - left) more bytes */ 592 mbcur = nmc->nmc_mcur; 593 left = nmc->nmc_left; 594 need = len - left; 595 596 if (need > mbuf_trailingspace(mbcur)) { 597 /* 598 * The needed bytes won't fit in the current mbuf so we'll 599 * allocate a new mbuf to hold the contiguous range of data. 600 */ 601 nfsm_mbuf_get(error, &mb, len); 602 if (error) 603 return (error); 604 /* double check that this mbuf can hold all the data */ 605 if (mbuf_maxlen(mb) < len) { 606 mbuf_free(mb); 607 return (EOVERFLOW); 608 } 609 610 /* the returned pointer will be the new mbuf's data pointer */ 611 *pptr = ptr = mbuf_data(mb); 612 613 /* copy "left" bytes to the new mbuf */ 614 bcopy(nmc->nmc_ptr, ptr, left); 615 ptr += left; 616 mbuf_setlen(mb, left); 617 618 /* insert the new mbuf between the current and next mbufs */ 619 error = mbuf_setnext(mb, mbuf_next(mbcur)); 620 if (!error) 621 error = mbuf_setnext(mbcur, mb); 622 if (error) { 623 mbuf_free(mb); 624 return (error); 625 } 626 627 /* reduce current mbuf's length by "left" */ 628 mbuf_setlen(mbcur, mbuf_len(mbcur) - left); 629 630 /* 631 * update nmc's state to point at the end of the mbuf 632 * where the needed data will be copied to. 633 */ 634 nmc->nmc_mcur = mbcur = mb; 635 nmc->nmc_left = 0; 636 nmc->nmc_ptr = (caddr_t)ptr; 637 } else { 638 /* The rest of the data will fit in this mbuf. */ 639 640 /* the returned pointer will be the current pointer */ 641 *pptr = (u_char*)nmc->nmc_ptr; 642 643 /* 644 * update nmc's state to point at the end of the mbuf 645 * where the needed data will be copied to. 646 */ 647 nmc->nmc_ptr += left; 648 nmc->nmc_left = 0; 649 } 650 651 /* 652 * move the next "need" bytes into the current 653 * mbuf from the mbufs that follow 654 */ 655 656 /* extend current mbuf length */ 657 mbuf_setlen(mbcur, mbuf_len(mbcur) + need); 658 659 /* mb follows mbufs we're copying/compacting data from */ 660 mb = mbuf_next(mbcur); 661 662 while (need && mb) { 663 /* copy as much as we need/can */ 664 ptr = mbuf_data(mb); 665 mblen = mbuf_len(mb); 666 cplen = MIN(mblen, need); 667 if (cplen) { 668 bcopy(ptr, nmc->nmc_ptr, cplen); 669 /* 670 * update the mbuf's pointer and length to reflect that 671 * the data was shifted to an earlier mbuf in the chain 672 */ 673 error = mbuf_setdata(mb, ptr + cplen, mblen - cplen); 674 if (error) { 675 mbuf_setlen(mbcur, mbuf_len(mbcur) - need); 676 return (error); 677 } 678 /* update pointer/need */ 679 nmc->nmc_ptr += cplen; 680 need -= cplen; 681 } 682 /* if more needed, go to next mbuf */ 683 if (need) 684 mb = mbuf_next(mb); 685 } 686 687 /* did we run out of data in the mbuf chain? */ 688 if (need) { 689 mbuf_setlen(mbcur, mbuf_len(mbcur) - need); 690 return (EBADRPC); 691 } 692 693 /* 694 * update nmc's state to point after this contiguous data 695 * 696 * "mb" points to the last mbuf we copied data from so we 697 * just set nmc to point at whatever remains in that mbuf. 698 */ 699 nmc->nmc_mcur = mb; 700 nmc->nmc_ptr = mbuf_data(mb); 701 nmc->nmc_left = mbuf_len(mb); 702 703 /* move past any padding */ 704 if (padlen) 705 error = nfsm_chain_advance(nmc, padlen); 706 707 return (error); 708} 709 710/* 711 * nfsm_chain_get_opaque_f() 712 * 713 * Read the next "len" bytes in the chain into "buf". 714 * The nfsm_chain is advanced by nfsm_rndup("len") bytes. 715 */ 716int 717nfsm_chain_get_opaque_f(struct nfsm_chain *nmc, uint32_t len, u_char *buf) 718{ 719 uint32_t cplen, padlen; 720 int error = 0; 721 722 padlen = nfsm_rndup(len) - len; 723 724 /* loop through mbufs copying all the data we need */ 725 while (len && nmc->nmc_mcur) { 726 /* copy as much as we need/can */ 727 cplen = MIN(nmc->nmc_left, len); 728 if (cplen) { 729 bcopy(nmc->nmc_ptr, buf, cplen); 730 nmc->nmc_ptr += cplen; 731 nmc->nmc_left -= cplen; 732 buf += cplen; 733 len -= cplen; 734 } 735 /* if more needed, go to next mbuf */ 736 if (len) { 737 mbuf_t mb = mbuf_next(nmc->nmc_mcur); 738 nmc->nmc_mcur = mb; 739 nmc->nmc_ptr = mb ? mbuf_data(mb) : NULL; 740 nmc->nmc_left = mb ? mbuf_len(mb) : 0; 741 } 742 } 743 744 /* did we run out of data in the mbuf chain? */ 745 if (len) 746 return (EBADRPC); 747 748 if (padlen) 749 nfsm_chain_adv(error, nmc, padlen); 750 751 return (error); 752} 753 754/* 755 * nfsm_chain_get_uio() 756 * 757 * Read the next "len" bytes in the chain into the given uio. 758 * The nfsm_chain is advanced by nfsm_rndup("len") bytes. 759 */ 760int 761nfsm_chain_get_uio(struct nfsm_chain *nmc, uint32_t len, uio_t uio) 762{ 763 uint32_t cplen, padlen; 764 int error = 0; 765 766 padlen = nfsm_rndup(len) - len; 767 768 /* loop through mbufs copying all the data we need */ 769 while (len && nmc->nmc_mcur) { 770 /* copy as much as we need/can */ 771 cplen = MIN(nmc->nmc_left, len); 772 if (cplen) { 773 error = uiomove(nmc->nmc_ptr, cplen, uio); 774 if (error) 775 return (error); 776 nmc->nmc_ptr += cplen; 777 nmc->nmc_left -= cplen; 778 len -= cplen; 779 } 780 /* if more needed, go to next mbuf */ 781 if (len) { 782 mbuf_t mb = mbuf_next(nmc->nmc_mcur); 783 nmc->nmc_mcur = mb; 784 nmc->nmc_ptr = mb ? mbuf_data(mb) : NULL; 785 nmc->nmc_left = mb ? mbuf_len(mb) : 0; 786 } 787 } 788 789 /* did we run out of data in the mbuf chain? */ 790 if (len) 791 return (EBADRPC); 792 793 if (padlen) 794 nfsm_chain_adv(error, nmc, padlen); 795 796 return (error); 797} 798 799#if NFSCLIENT 800 801int 802nfsm_chain_add_string_nfc(struct nfsm_chain *nmc, const uint8_t *s, uint32_t slen) 803{ 804 uint8_t smallbuf[64]; 805 uint8_t *nfcname = smallbuf; 806 size_t buflen = sizeof(smallbuf), nfclen; 807 int error; 808 809 error = utf8_normalizestr(s, slen, nfcname, &nfclen, buflen, UTF_PRECOMPOSED|UTF_NO_NULL_TERM); 810 if (error == ENAMETOOLONG) { 811 buflen = MAXPATHLEN; 812 MALLOC_ZONE(nfcname, uint8_t *, MAXPATHLEN, M_NAMEI, M_WAITOK); 813 if (nfcname) 814 error = utf8_normalizestr(s, slen, nfcname, &nfclen, buflen, UTF_PRECOMPOSED|UTF_NO_NULL_TERM); 815 } 816 817 /* if we got an error, just use the original string */ 818 if (error) 819 nfsm_chain_add_string(error, nmc, s, slen); 820 else 821 nfsm_chain_add_string(error, nmc, nfcname, nfclen); 822 823 if (nfcname && (nfcname != smallbuf)) 824 FREE_ZONE(nfcname, MAXPATHLEN, M_NAMEI); 825 return (error); 826} 827 828/* 829 * Add an NFSv2 "sattr" structure to an mbuf chain 830 */ 831int 832nfsm_chain_add_v2sattr_f(struct nfsm_chain *nmc, struct vnode_attr *vap, uint32_t szrdev) 833{ 834 int error = 0; 835 836 nfsm_chain_add_32(error, nmc, vtonfsv2_mode(vap->va_type, 837 (VATTR_IS_ACTIVE(vap, va_mode) ? vap->va_mode : 0600))); 838 nfsm_chain_add_32(error, nmc, 839 VATTR_IS_ACTIVE(vap, va_uid) ? vap->va_uid : (uint32_t)-1); 840 nfsm_chain_add_32(error, nmc, 841 VATTR_IS_ACTIVE(vap, va_gid) ? vap->va_gid : (uint32_t)-1); 842 nfsm_chain_add_32(error, nmc, szrdev); 843 nfsm_chain_add_v2time(error, nmc, 844 VATTR_IS_ACTIVE(vap, va_access_time) ? 845 &vap->va_access_time : NULL); 846 nfsm_chain_add_v2time(error, nmc, 847 VATTR_IS_ACTIVE(vap, va_modify_time) ? 848 &vap->va_modify_time : NULL); 849 850 return (error); 851} 852 853/* 854 * Add an NFSv3 "sattr" structure to an mbuf chain 855 */ 856int 857nfsm_chain_add_v3sattr_f(struct nfsm_chain *nmc, struct vnode_attr *vap) 858{ 859 int error = 0; 860 861 if (VATTR_IS_ACTIVE(vap, va_mode)) { 862 nfsm_chain_add_32(error, nmc, TRUE); 863 nfsm_chain_add_32(error, nmc, vap->va_mode); 864 } else { 865 nfsm_chain_add_32(error, nmc, FALSE); 866 } 867 if (VATTR_IS_ACTIVE(vap, va_uid)) { 868 nfsm_chain_add_32(error, nmc, TRUE); 869 nfsm_chain_add_32(error, nmc, vap->va_uid); 870 } else { 871 nfsm_chain_add_32(error, nmc, FALSE); 872 } 873 if (VATTR_IS_ACTIVE(vap, va_gid)) { 874 nfsm_chain_add_32(error, nmc, TRUE); 875 nfsm_chain_add_32(error, nmc, vap->va_gid); 876 } else { 877 nfsm_chain_add_32(error, nmc, FALSE); 878 } 879 if (VATTR_IS_ACTIVE(vap, va_data_size)) { 880 nfsm_chain_add_32(error, nmc, TRUE); 881 nfsm_chain_add_64(error, nmc, vap->va_data_size); 882 } else { 883 nfsm_chain_add_32(error, nmc, FALSE); 884 } 885 if (vap->va_vaflags & VA_UTIMES_NULL) { 886 nfsm_chain_add_32(error, nmc, NFS_TIME_SET_TO_SERVER); 887 nfsm_chain_add_32(error, nmc, NFS_TIME_SET_TO_SERVER); 888 } else { 889 if (VATTR_IS_ACTIVE(vap, va_access_time)) { 890 nfsm_chain_add_32(error, nmc, NFS_TIME_SET_TO_CLIENT); 891 nfsm_chain_add_32(error, nmc, vap->va_access_time.tv_sec); 892 nfsm_chain_add_32(error, nmc, vap->va_access_time.tv_nsec); 893 } else { 894 nfsm_chain_add_32(error, nmc, NFS_TIME_DONT_CHANGE); 895 } 896 if (VATTR_IS_ACTIVE(vap, va_modify_time)) { 897 nfsm_chain_add_32(error, nmc, NFS_TIME_SET_TO_CLIENT); 898 nfsm_chain_add_32(error, nmc, vap->va_modify_time.tv_sec); 899 nfsm_chain_add_32(error, nmc, vap->va_modify_time.tv_nsec); 900 } else { 901 nfsm_chain_add_32(error, nmc, NFS_TIME_DONT_CHANGE); 902 } 903 } 904 905 return (error); 906} 907 908 909/* 910 * nfsm_chain_get_fh_attr() 911 * 912 * Get the file handle and attributes from an mbuf chain. (NFSv2/v3) 913 */ 914int 915nfsm_chain_get_fh_attr( 916 struct nfsm_chain *nmc, 917 nfsnode_t dnp, 918 vfs_context_t ctx, 919 int nfsvers, 920 uint64_t *xidp, 921 fhandle_t *fhp, 922 struct nfs_vattr *nvap) 923{ 924 int error = 0, gotfh, gotattr; 925 926 gotfh = gotattr = 1; 927 928 if (nfsvers == NFS_VER3) /* check for file handle */ 929 nfsm_chain_get_32(error, nmc, gotfh); 930 if (!error && gotfh) /* get file handle */ 931 nfsm_chain_get_fh(error, nmc, nfsvers, fhp); 932 else 933 fhp->fh_len = 0; 934 if (nfsvers == NFS_VER3) /* check for file attributes */ 935 nfsm_chain_get_32(error, nmc, gotattr); 936 nfsmout_if(error); 937 if (gotattr) { 938 if (!gotfh) /* skip attributes */ 939 nfsm_chain_adv(error, nmc, NFSX_V3FATTR); 940 else /* get attributes */ 941 error = nfs_parsefattr(nmc, nfsvers, nvap); 942 } else if (gotfh) { 943 /* we need valid attributes in order to call nfs_nget() */ 944 if (nfs3_getattr_rpc(NULL, NFSTOMP(dnp), fhp->fh_data, fhp->fh_len, 0, ctx, nvap, xidp)) { 945 gotattr = 0; 946 fhp->fh_len = 0; 947 } 948 } 949nfsmout: 950 return (error); 951} 952 953/* 954 * Get and process NFSv3 WCC data from an mbuf chain 955 */ 956int 957nfsm_chain_get_wcc_data_f( 958 struct nfsm_chain *nmc, 959 nfsnode_t np, 960 struct timespec *premtime, 961 int *newpostattr, 962 u_int64_t *xidp) 963{ 964 int error = 0; 965 uint32_t flag = 0; 966 967 nfsm_chain_get_32(error, nmc, flag); 968 if (!error && flag) { 969 nfsm_chain_adv(error, nmc, 2 * NFSX_UNSIGNED); 970 nfsm_chain_get_32(error, nmc, premtime->tv_sec); 971 nfsm_chain_get_32(error, nmc, premtime->tv_nsec); 972 nfsm_chain_adv(error, nmc, 2 * NFSX_UNSIGNED); 973 } else { 974 premtime->tv_sec = 0; 975 premtime->tv_nsec = 0; 976 } 977 nfsm_chain_postop_attr_update_flag(error, nmc, np, *newpostattr, xidp); 978 979 return (error); 980} 981 982/* 983 * Get the next RPC transaction ID (XID) 984 */ 985void 986nfs_get_xid(uint64_t *xidp) 987{ 988 struct timeval tv; 989 990 lck_mtx_lock(nfs_request_mutex); 991 if (!nfs_xid) { 992 /* 993 * Derive initial xid from system time. 994 * 995 * Note: it's OK if this code inits nfs_xid to 0 (for example, 996 * due to a broken clock) because we immediately increment it 997 * and we guarantee to never use xid 0. So, nfs_xid should only 998 * ever be 0 the first time this function is called. 999 */ 1000 microtime(&tv); 1001 nfs_xid = tv.tv_sec << 12; 1002 } 1003 if (++nfs_xid == 0) { 1004 /* Skip zero xid if it should ever happen. */ 1005 nfs_xidwrap++; 1006 nfs_xid++; 1007 } 1008 *xidp = nfs_xid + ((uint64_t)nfs_xidwrap << 32); 1009 lck_mtx_unlock(nfs_request_mutex); 1010} 1011 1012/* 1013 * Build the RPC header and fill in the authorization info. 1014 * Returns the head of the mbuf list and the xid. 1015 */ 1016 1017int 1018nfsm_rpchead( 1019 struct nfsreq *req, 1020 mbuf_t mrest, 1021 u_int64_t *xidp, 1022 mbuf_t *mreqp) 1023{ 1024 struct nfsmount *nmp = req->r_nmp; 1025 int nfsvers = nmp->nm_vers; 1026 int proc = ((nfsvers == NFS_VER2) ? nfsv2_procid[req->r_procnum] : (int)req->r_procnum); 1027 1028 return nfsm_rpchead2(nmp, nmp->nm_sotype, NFS_PROG, nfsvers, proc, 1029 req->r_auth, req->r_cred, req, mrest, xidp, mreqp); 1030} 1031 1032int 1033nfsm_rpchead2(struct nfsmount *nmp, int sotype, int prog, int vers, int proc, int auth_type, 1034 kauth_cred_t cred, struct nfsreq *req, mbuf_t mrest, u_int64_t *xidp, mbuf_t *mreqp) 1035{ 1036 mbuf_t mreq, mb; 1037 int error, i, grpsiz, auth_len = 0, authsiz, reqlen; 1038 size_t headlen; 1039 struct nfsm_chain nmreq; 1040 1041 /* calculate expected auth length */ 1042 switch (auth_type) { 1043 case RPCAUTH_NONE: 1044 auth_len = 0; 1045 break; 1046 case RPCAUTH_SYS: 1047 { 1048 gid_t grouplist[NGROUPS]; 1049 int groupcount = NGROUPS; 1050 1051 if (!cred) 1052 return (EINVAL); 1053 1054 (void)kauth_cred_getgroups(cred, grouplist, &groupcount); 1055 if (groupcount < 1) 1056 return (EINVAL); 1057 1058 auth_len = (((((uint32_t)groupcount - 1) > nmp->nm_numgrps) ? 1059 nmp->nm_numgrps : (groupcount - 1)) << 2) + 1060 5 * NFSX_UNSIGNED; 1061 break; 1062 } 1063 case RPCAUTH_KRB5: 1064 case RPCAUTH_KRB5I: 1065 case RPCAUTH_KRB5P: 1066 if (!req || !cred) 1067 return (EINVAL); 1068 auth_len = 5 * NFSX_UNSIGNED + 0; // zero context handle for now 1069 break; 1070 default: 1071 return (EINVAL); 1072 } 1073 authsiz = nfsm_rndup(auth_len); 1074 1075 /* allocate the packet */ 1076 headlen = authsiz + 10 * NFSX_UNSIGNED; 1077 if (sotype == SOCK_STREAM) /* also include room for any RPC Record Mark */ 1078 headlen += NFSX_UNSIGNED; 1079 if (headlen >= nfs_mbuf_minclsize) { 1080 error = mbuf_getpacket(MBUF_WAITOK, &mreq); 1081 } else { 1082 error = mbuf_gethdr(MBUF_WAITOK, MBUF_TYPE_DATA, &mreq); 1083 if (!error) { 1084 if (headlen < nfs_mbuf_mhlen) 1085 mbuf_align_32(mreq, headlen); 1086 else 1087 mbuf_align_32(mreq, 8 * NFSX_UNSIGNED); 1088 } 1089 } 1090 if (error) { 1091 /* unable to allocate packet */ 1092 /* XXX should we keep statistics for these errors? */ 1093 return (error); 1094 } 1095 1096 /* 1097 * If the caller gave us a non-zero XID then use it because 1098 * it may be a higher-level resend with a GSSAPI credential. 1099 * Otherwise, allocate a new one. 1100 */ 1101 if (*xidp == 0) 1102 nfs_get_xid(xidp); 1103 1104 /* build the header(s) */ 1105 nfsm_chain_init(&nmreq, mreq); 1106 1107 /* First, if it's a TCP stream insert space for an RPC record mark */ 1108 if (sotype == SOCK_STREAM) 1109 nfsm_chain_add_32(error, &nmreq, 0); 1110 1111 /* Then the RPC header. */ 1112 nfsm_chain_add_32(error, &nmreq, (*xidp & 0xffffffff)); 1113 nfsm_chain_add_32(error, &nmreq, RPC_CALL); 1114 nfsm_chain_add_32(error, &nmreq, RPC_VER2); 1115 nfsm_chain_add_32(error, &nmreq, prog); 1116 nfsm_chain_add_32(error, &nmreq, vers); 1117 nfsm_chain_add_32(error, &nmreq, proc); 1118 1119add_cred: 1120 switch (auth_type) { 1121 case RPCAUTH_NONE: 1122 nfsm_chain_add_32(error, &nmreq, RPCAUTH_NONE); /* auth */ 1123 nfsm_chain_add_32(error, &nmreq, 0); /* length */ 1124 nfsm_chain_add_32(error, &nmreq, RPCAUTH_NONE); /* verf */ 1125 nfsm_chain_add_32(error, &nmreq, 0); /* length */ 1126 nfsm_chain_build_done(error, &nmreq); 1127 /* Append the args mbufs */ 1128 if (!error) 1129 error = mbuf_setnext(nmreq.nmc_mcur, mrest); 1130 break; 1131 case RPCAUTH_SYS: { 1132 gid_t grouplist[NGROUPS]; 1133 int groupcount; 1134 1135 nfsm_chain_add_32(error, &nmreq, RPCAUTH_SYS); 1136 nfsm_chain_add_32(error, &nmreq, authsiz); 1137 nfsm_chain_add_32(error, &nmreq, 0); /* stamp */ 1138 nfsm_chain_add_32(error, &nmreq, 0); /* zero-length hostname */ 1139 nfsm_chain_add_32(error, &nmreq, kauth_cred_getuid(cred)); /* UID */ 1140 nfsm_chain_add_32(error, &nmreq, kauth_cred_getgid(cred)); /* GID */ 1141 grpsiz = (auth_len >> 2) - 5; 1142 nfsm_chain_add_32(error, &nmreq, grpsiz);/* additional GIDs */ 1143 memset(grouplist, 0, sizeof(grouplist)); 1144 groupcount = grpsiz; 1145 (void)kauth_cred_getgroups(cred, grouplist, &groupcount); 1146 for (i = 1; i <= grpsiz; i++) 1147 nfsm_chain_add_32(error, &nmreq, grouplist[i]); 1148 1149 /* And the verifier... */ 1150 nfsm_chain_add_32(error, &nmreq, RPCAUTH_NONE); /* flavor */ 1151 nfsm_chain_add_32(error, &nmreq, 0); /* length */ 1152 nfsm_chain_build_done(error, &nmreq); 1153 1154 /* Append the args mbufs */ 1155 if (!error) 1156 error = mbuf_setnext(nmreq.nmc_mcur, mrest); 1157 break; 1158 } 1159 case RPCAUTH_KRB5: 1160 case RPCAUTH_KRB5I: 1161 case RPCAUTH_KRB5P: 1162 error = nfs_gss_clnt_cred_put(req, &nmreq, mrest); 1163 if (error == ENEEDAUTH) { 1164 gid_t grouplist[NGROUPS]; 1165 int groupcount = NGROUPS; 1166 /* 1167 * Use sec=sys for this user 1168 */ 1169 error = 0; 1170 req->r_auth = auth_type = RPCAUTH_SYS; 1171 (void)kauth_cred_getgroups(cred, grouplist, &groupcount); 1172 auth_len = (((((uint32_t)groupcount - 1) > nmp->nm_numgrps) ? 1173 nmp->nm_numgrps : (groupcount - 1)) << 2) + 1174 5 * NFSX_UNSIGNED; 1175 authsiz = nfsm_rndup(auth_len); 1176 goto add_cred; 1177 } 1178 break; 1179 }; 1180 1181 /* finish setting up the packet */ 1182 if (!error) 1183 error = mbuf_pkthdr_setrcvif(mreq, 0); 1184 1185 if (error) { 1186 mbuf_freem(mreq); 1187 return (error); 1188 } 1189 1190 /* Calculate the size of the request */ 1191 reqlen = 0; 1192 for (mb = nmreq.nmc_mhead; mb; mb = mbuf_next(mb)) 1193 reqlen += mbuf_len(mb); 1194 1195 mbuf_pkthdr_setlen(mreq, reqlen); 1196 1197 /* 1198 * If the request goes on a TCP stream, 1199 * set its size in the RPC record mark. 1200 * The record mark count doesn't include itself 1201 * and the last fragment bit is set. 1202 */ 1203 if (sotype == SOCK_STREAM) 1204 nfsm_chain_set_recmark(error, &nmreq, 1205 (reqlen - NFSX_UNSIGNED) | 0x80000000); 1206 1207 *mreqp = mreq; 1208 return (0); 1209} 1210 1211/* 1212 * Parse an NFS file attribute structure out of an mbuf chain. 1213 */ 1214int 1215nfs_parsefattr(struct nfsm_chain *nmc, int nfsvers, struct nfs_vattr *nvap) 1216{ 1217 int error = 0; 1218 enum vtype vtype; 1219 nfstype nvtype; 1220 u_short vmode; 1221 uint32_t val, val2; 1222 dev_t rdev; 1223 1224 val = val2 = 0; 1225 NVATTR_INIT(nvap); 1226 1227 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_TYPE); 1228 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_MODE); 1229 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_NUMLINKS); 1230 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_OWNER); 1231 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_OWNER_GROUP); 1232 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_SIZE); 1233 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_SPACE_USED); 1234 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_RAWDEV); 1235 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_FSID); 1236 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_FILEID); 1237 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_TIME_ACCESS); 1238 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_TIME_MODIFY); 1239 NFS_BITMAP_SET(nvap->nva_bitmap, NFS_FATTR_TIME_METADATA); 1240 1241 nfsm_chain_get_32(error, nmc, nvtype); 1242 nfsm_chain_get_32(error, nmc, vmode); 1243 nfsmout_if(error); 1244 1245 if (nfsvers == NFS_VER3) { 1246 nvap->nva_type = vtype = nfstov_type(nvtype, nfsvers); 1247 } else { 1248 /* 1249 * The duplicate information returned in fa_type and fa_mode 1250 * is an ambiguity in the NFS version 2 protocol. 1251 * 1252 * VREG should be taken literally as a regular file. If a 1253 * server intends to return some type information differently 1254 * in the upper bits of the mode field (e.g. for sockets, or 1255 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1256 * leave the examination of the mode bits even in the VREG 1257 * case to avoid breakage for bogus servers, but we make sure 1258 * that there are actually type bits set in the upper part of 1259 * fa_mode (and failing that, trust the va_type field). 1260 * 1261 * NFSv3 cleared the issue, and requires fa_mode to not 1262 * contain any type information (while also introducing 1263 * sockets and FIFOs for fa_type). 1264 */ 1265 vtype = nfstov_type(nvtype, nfsvers); 1266 if ((vtype == VNON) || ((vtype == VREG) && ((vmode & S_IFMT) != 0))) 1267 vtype = IFTOVT(vmode); 1268 nvap->nva_type = vtype; 1269 } 1270 1271 nvap->nva_mode = (vmode & 07777); 1272 1273 nfsm_chain_get_32(error, nmc, nvap->nva_nlink); 1274 nfsm_chain_get_32(error, nmc, nvap->nva_uid); 1275 nfsm_chain_get_32(error, nmc, nvap->nva_gid); 1276 1277 if (nfsvers == NFS_VER3) { 1278 nfsm_chain_get_64(error, nmc, nvap->nva_size); 1279 nfsm_chain_get_64(error, nmc, nvap->nva_bytes); 1280 nfsm_chain_get_32(error, nmc, nvap->nva_rawdev.specdata1); 1281 nfsm_chain_get_32(error, nmc, nvap->nva_rawdev.specdata2); 1282 nfsmout_if(error); 1283 nfsm_chain_get_64(error, nmc, nvap->nva_fsid.major); 1284 nvap->nva_fsid.minor = 0; 1285 nfsm_chain_get_64(error, nmc, nvap->nva_fileid); 1286 } else { 1287 nfsm_chain_get_32(error, nmc, nvap->nva_size); 1288 nfsm_chain_adv(error, nmc, NFSX_UNSIGNED); 1289 nfsm_chain_get_32(error, nmc, rdev); 1290 nfsmout_if(error); 1291 nvap->nva_rawdev.specdata1 = major(rdev); 1292 nvap->nva_rawdev.specdata2 = minor(rdev); 1293 nfsm_chain_get_32(error, nmc, val); /* blocks */ 1294 nfsmout_if(error); 1295 nvap->nva_bytes = val * NFS_FABLKSIZE; 1296 nfsm_chain_get_32(error, nmc, val); 1297 nfsmout_if(error); 1298 nvap->nva_fsid.major = (uint64_t)val; 1299 nvap->nva_fsid.minor = 0; 1300 nfsm_chain_get_32(error, nmc, val); 1301 nfsmout_if(error); 1302 nvap->nva_fileid = (uint64_t)val; 1303 /* Really ugly NFSv2 kludge. */ 1304 if ((vtype == VCHR) && (rdev == (dev_t)0xffffffff)) 1305 nvap->nva_type = VFIFO; 1306 } 1307 nfsm_chain_get_time(error, nmc, nfsvers, 1308 nvap->nva_timesec[NFSTIME_ACCESS], 1309 nvap->nva_timensec[NFSTIME_ACCESS]); 1310 nfsm_chain_get_time(error, nmc, nfsvers, 1311 nvap->nva_timesec[NFSTIME_MODIFY], 1312 nvap->nva_timensec[NFSTIME_MODIFY]); 1313 nfsm_chain_get_time(error, nmc, nfsvers, 1314 nvap->nva_timesec[NFSTIME_CHANGE], 1315 nvap->nva_timensec[NFSTIME_CHANGE]); 1316nfsmout: 1317 return (error); 1318} 1319 1320/* 1321 * Load the attribute cache (that lives in the nfsnode entry) with 1322 * the value pointed to by nvap, unless the file type in the attribute 1323 * cache doesn't match the file type in the nvap, in which case log a 1324 * warning and return ESTALE. 1325 * 1326 * If the dontshrink flag is set, then it's not safe to call ubc_setsize() 1327 * to shrink the size of the file. 1328 */ 1329int 1330nfs_loadattrcache( 1331 nfsnode_t np, 1332 struct nfs_vattr *nvap, 1333 u_int64_t *xidp, 1334 int dontshrink) 1335{ 1336 mount_t mp; 1337 vnode_t vp; 1338 struct timeval now; 1339 struct nfs_vattr *npnvap; 1340 int xattr = np->n_vattr.nva_flags & NFS_FFLAG_IS_ATTR; 1341 int referral = np->n_vattr.nva_flags & NFS_FFLAG_TRIGGER_REFERRAL; 1342 int aclbit, monitored, error = 0; 1343 kauth_acl_t acl; 1344 struct nfsmount *nmp; 1345 uint32_t events = np->n_events; 1346 1347 if (np->n_hflag & NHINIT) { 1348 vp = NULL; 1349 mp = np->n_mount; 1350 } else { 1351 vp = NFSTOV(np); 1352 mp = vnode_mount(vp); 1353 } 1354 monitored = vp ? vnode_ismonitored(vp) : 0; 1355 1356 FSDBG_TOP(527, np, vp, *xidp >> 32, *xidp); 1357 1358 if (!((nmp = VFSTONFS(mp)))) { 1359 FSDBG_BOT(527, ENXIO, 1, 0, *xidp); 1360 return (ENXIO); 1361 } 1362 1363 if (*xidp < np->n_xid) { 1364 /* 1365 * We have already updated attributes with a response from 1366 * a later request. The attributes we have here are probably 1367 * stale so we drop them (just return). However, our 1368 * out-of-order receipt could be correct - if the requests were 1369 * processed out of order at the server. Given the uncertainty 1370 * we invalidate our cached attributes. *xidp is zeroed here 1371 * to indicate the attributes were dropped - only getattr 1372 * cares - it needs to retry the rpc. 1373 */ 1374 NATTRINVALIDATE(np); 1375 FSDBG_BOT(527, 0, np, np->n_xid, *xidp); 1376 *xidp = 0; 1377 return (0); 1378 } 1379 1380 if (vp && (nvap->nva_type != vnode_vtype(vp))) { 1381 /* 1382 * The filehandle has changed type on us. This can be 1383 * caused by either the server not having unique filehandles 1384 * or because another client has removed the previous 1385 * filehandle and a new object (of a different type) 1386 * has been created with the same filehandle. 1387 * 1388 * We can't simply switch the type on the vnode because 1389 * there may be type-specific fields that need to be 1390 * cleaned up or set up. 1391 * 1392 * So, what should we do with this vnode? 1393 * 1394 * About the best we can do is log a warning and return 1395 * an error. ESTALE is about the closest error, but it 1396 * is a little strange that we come up with this error 1397 * internally instead of simply passing it through from 1398 * the server. Hopefully, the vnode will be reclaimed 1399 * soon so the filehandle can be reincarnated as the new 1400 * object type. 1401 */ 1402 printf("nfs loadattrcache vnode changed type, was %d now %d\n", 1403 vnode_vtype(vp), nvap->nva_type); 1404 error = ESTALE; 1405 if (monitored) 1406 events |= VNODE_EVENT_DELETE; 1407 goto out; 1408 } 1409 1410 npnvap = &np->n_vattr; 1411 1412 /* 1413 * The ACL cache needs special handling because it is not 1414 * always updated. Save current ACL cache state so it can 1415 * be restored after copying the new attributes into place. 1416 */ 1417 aclbit = NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_ACL); 1418 acl = npnvap->nva_acl; 1419 1420 if (monitored) { 1421 /* 1422 * For monitored nodes, check for attribute changes that should generate events. 1423 */ 1424 if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_NUMLINKS) && 1425 (nvap->nva_nlink != npnvap->nva_nlink)) 1426 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_LINK; 1427 if (events & VNODE_EVENT_PERMS) 1428 /* no need to do all the checking if it's already set */; 1429 else if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_MODE) && 1430 (nvap->nva_mode != npnvap->nva_mode)) 1431 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1432 else if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_OWNER) && 1433 (nvap->nva_uid != npnvap->nva_uid)) 1434 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1435 else if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_OWNER_GROUP) && 1436 (nvap->nva_gid != npnvap->nva_gid)) 1437 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1438 else if (nmp->nm_vers >= NFS_VER4) { 1439 if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_OWNER) && 1440 !kauth_guid_equal(&nvap->nva_uuuid, &npnvap->nva_uuuid)) 1441 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1442 else if (NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_OWNER_GROUP) && 1443 !kauth_guid_equal(&nvap->nva_guuid, &npnvap->nva_guuid)) 1444 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1445 else if ((NFS_BITMAP_ISSET(nvap->nva_bitmap, NFS_FATTR_ACL) && 1446 nvap->nva_acl && npnvap->nva_acl && 1447 ((nvap->nva_acl->acl_entrycount != npnvap->nva_acl->acl_entrycount) || 1448 bcmp(nvap->nva_acl, npnvap->nva_acl, KAUTH_ACL_COPYSIZE(nvap->nva_acl))))) 1449 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_PERMS; 1450 } 1451 if (((nmp->nm_vers >= NFS_VER4) && (nvap->nva_change != npnvap->nva_change)) || 1452 (NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_TIME_MODIFY) && 1453 ((nvap->nva_timesec[NFSTIME_MODIFY] != npnvap->nva_timesec[NFSTIME_MODIFY]) || 1454 (nvap->nva_timensec[NFSTIME_MODIFY] != npnvap->nva_timensec[NFSTIME_MODIFY])))) 1455 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_WRITE; 1456 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_RAWDEV) && 1457 ((nvap->nva_rawdev.specdata1 != npnvap->nva_rawdev.specdata1) || 1458 (nvap->nva_rawdev.specdata2 != npnvap->nva_rawdev.specdata2))) 1459 events |= VNODE_EVENT_ATTRIB; 1460 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_FILEID) && 1461 (nvap->nva_fileid != npnvap->nva_fileid)) 1462 events |= VNODE_EVENT_ATTRIB; 1463 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_ARCHIVE) && 1464 ((nvap->nva_flags & NFS_FFLAG_ARCHIVED) != (npnvap->nva_flags & NFS_FFLAG_ARCHIVED))) 1465 events |= VNODE_EVENT_ATTRIB; 1466 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_HIDDEN) && 1467 ((nvap->nva_flags & NFS_FFLAG_HIDDEN) != (npnvap->nva_flags & NFS_FFLAG_HIDDEN))) 1468 events |= VNODE_EVENT_ATTRIB; 1469 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_TIME_CREATE) && 1470 ((nvap->nva_timesec[NFSTIME_CREATE] != npnvap->nva_timesec[NFSTIME_CREATE]) || 1471 (nvap->nva_timensec[NFSTIME_CREATE] != npnvap->nva_timensec[NFSTIME_CREATE]))) 1472 events |= VNODE_EVENT_ATTRIB; 1473 if (!events && NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_TIME_BACKUP) && 1474 ((nvap->nva_timesec[NFSTIME_BACKUP] != npnvap->nva_timesec[NFSTIME_BACKUP]) || 1475 (nvap->nva_timensec[NFSTIME_BACKUP] != npnvap->nva_timensec[NFSTIME_BACKUP]))) 1476 events |= VNODE_EVENT_ATTRIB; 1477 } 1478 1479 /* Copy the attributes to the attribute cache */ 1480 bcopy((caddr_t)nvap, (caddr_t)npnvap, sizeof(*nvap)); 1481 1482 microuptime(&now); 1483 np->n_attrstamp = now.tv_sec; 1484 np->n_xid = *xidp; 1485 /* NFS_FFLAG_IS_ATTR and NFS_FFLAG_TRIGGER_REFERRAL need to be sticky... */ 1486 if (vp && xattr) 1487 nvap->nva_flags |= xattr; 1488 if (vp && referral) 1489 nvap->nva_flags |= referral; 1490 1491 if (NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_ACL)) { 1492 /* we're updating the ACL */ 1493 if (nvap->nva_acl) { 1494 /* make a copy of the acl for the cache */ 1495 npnvap->nva_acl = kauth_acl_alloc(nvap->nva_acl->acl_entrycount); 1496 if (npnvap->nva_acl) { 1497 bcopy(nvap->nva_acl, npnvap->nva_acl, KAUTH_ACL_COPYSIZE(nvap->nva_acl)); 1498 } else { 1499 /* can't make a copy to cache, invalidate ACL cache */ 1500 NFS_BITMAP_CLR(npnvap->nva_bitmap, NFS_FATTR_ACL); 1501 NACLINVALIDATE(np); 1502 aclbit = 0; 1503 } 1504 } 1505 if (acl) { 1506 kauth_acl_free(acl); 1507 acl = NULL; 1508 } 1509 } 1510 if (NFS_BITMAP_ISSET(npnvap->nva_bitmap, NFS_FATTR_ACL)) { 1511 /* update the ACL timestamp */ 1512 np->n_aclstamp = now.tv_sec; 1513 } else { 1514 /* we aren't updating the ACL, so restore original values */ 1515 if (aclbit) 1516 NFS_BITMAP_SET(npnvap->nva_bitmap, NFS_FATTR_ACL); 1517 npnvap->nva_acl = acl; 1518 } 1519 1520#if CONFIG_TRIGGERS 1521 /* 1522 * For NFSv4, if the fsid doesn't match the fsid for the mount, then 1523 * this node is for a different file system on the server. So we mark 1524 * this node as a trigger node that will trigger the mirror mount. 1525 */ 1526 if ((nmp->nm_vers >= NFS_VER4) && (nvap->nva_type == VDIR) && 1527 ((np->n_vattr.nva_fsid.major != nmp->nm_fsid.major) || 1528 (np->n_vattr.nva_fsid.minor != nmp->nm_fsid.minor))) 1529 np->n_vattr.nva_flags |= NFS_FFLAG_TRIGGER; 1530#endif 1531 1532 if (!vp || (nvap->nva_type != VREG)) { 1533 np->n_size = nvap->nva_size; 1534 } else if (nvap->nva_size != np->n_size) { 1535 FSDBG(527, np, nvap->nva_size, np->n_size, (nvap->nva_type == VREG) | (np->n_flag & NMODIFIED ? 6 : 4)); 1536 if (!UBCINFOEXISTS(vp) || (dontshrink && (nvap->nva_size < np->n_size))) { 1537 /* asked not to shrink, so stick with current size */ 1538 FSDBG(527, np, np->n_size, np->n_vattr.nva_size, 0xf00d0001); 1539 nvap->nva_size = np->n_size; 1540 NATTRINVALIDATE(np); 1541 } else if ((np->n_flag & NMODIFIED) && (nvap->nva_size < np->n_size)) { 1542 /* if we've modified, stick with larger size */ 1543 FSDBG(527, np, np->n_size, np->n_vattr.nva_size, 0xf00d0002); 1544 nvap->nva_size = np->n_size; 1545 npnvap->nva_size = np->n_size; 1546 } else { 1547 /* 1548 * n_size is protected by the data lock, so we need to 1549 * defer updating it until it's safe. We save the new size 1550 * and set a flag and it'll get updated the next time we get/drop 1551 * the data lock or the next time we do a getattr. 1552 */ 1553 np->n_newsize = nvap->nva_size; 1554 SET(np->n_flag, NUPDATESIZE); 1555 if (monitored) 1556 events |= VNODE_EVENT_ATTRIB | VNODE_EVENT_EXTEND; 1557 } 1558 } 1559 1560 if (np->n_flag & NCHG) { 1561 if (np->n_flag & NACC) { 1562 nvap->nva_timesec[NFSTIME_ACCESS] = np->n_atim.tv_sec; 1563 nvap->nva_timensec[NFSTIME_ACCESS] = np->n_atim.tv_nsec; 1564 } 1565 if (np->n_flag & NUPD) { 1566 nvap->nva_timesec[NFSTIME_MODIFY] = np->n_mtim.tv_sec; 1567 nvap->nva_timensec[NFSTIME_MODIFY] = np->n_mtim.tv_nsec; 1568 } 1569 } 1570 1571out: 1572 if (monitored && events) 1573 nfs_vnode_notify(np, events); 1574 FSDBG_BOT(527, error, np, np->n_size, *xidp); 1575 return (error); 1576} 1577 1578/* 1579 * Calculate the attribute timeout based on 1580 * how recently the file has been modified. 1581 */ 1582int 1583nfs_attrcachetimeout(nfsnode_t np) 1584{ 1585 struct nfsmount *nmp; 1586 struct timeval now; 1587 int isdir; 1588 uint32_t timeo; 1589 1590 if (!(nmp = NFSTONMP(np))) 1591 return (0); 1592 1593 isdir = vnode_isdir(NFSTOV(np)); 1594 1595 if ((nmp->nm_vers >= NFS_VER4) && (np->n_openflags & N_DELEG_MASK)) { 1596 /* If we have a delegation, we always use the max timeout. */ 1597 timeo = isdir ? nmp->nm_acdirmax : nmp->nm_acregmax; 1598 } else if ((np)->n_flag & NMODIFIED) { 1599 /* If we have modifications, we always use the min timeout. */ 1600 timeo = isdir ? nmp->nm_acdirmin : nmp->nm_acregmin; 1601 } else { 1602 /* Otherwise, we base the timeout on how old the file seems. */ 1603 /* Note that if the client and server clocks are way out of sync, */ 1604 /* timeout will probably get clamped to a min or max value */ 1605 microtime(&now); 1606 timeo = (now.tv_sec - (np)->n_vattr.nva_timesec[NFSTIME_MODIFY]) / 10; 1607 if (isdir) { 1608 if (timeo < nmp->nm_acdirmin) 1609 timeo = nmp->nm_acdirmin; 1610 else if (timeo > nmp->nm_acdirmax) 1611 timeo = nmp->nm_acdirmax; 1612 } else { 1613 if (timeo < nmp->nm_acregmin) 1614 timeo = nmp->nm_acregmin; 1615 else if (timeo > nmp->nm_acregmax) 1616 timeo = nmp->nm_acregmax; 1617 } 1618 } 1619 1620 return (timeo); 1621} 1622 1623/* 1624 * Check the attribute cache time stamp. 1625 * If the cache is valid, copy contents to *nvaper and return 0 1626 * otherwise return an error. 1627 * Must be called with the node locked. 1628 */ 1629int 1630nfs_getattrcache(nfsnode_t np, struct nfs_vattr *nvaper, int flags) 1631{ 1632 struct nfs_vattr *nvap; 1633 struct timeval nowup; 1634 int32_t timeo; 1635 1636 /* Check if the attributes are valid. */ 1637 if (!NATTRVALID(np) || ((flags & NGA_ACL) && !NACLVALID(np))) { 1638 FSDBG(528, np, 0, 0xffffff01, ENOENT); 1639 OSAddAtomic64(1, &nfsstats.attrcache_misses); 1640 return (ENOENT); 1641 } 1642 1643 /* Verify the cached attributes haven't timed out. */ 1644 timeo = nfs_attrcachetimeout(np); 1645 microuptime(&nowup); 1646 if ((nowup.tv_sec - np->n_attrstamp) >= timeo) { 1647 FSDBG(528, np, 0, 0xffffff02, ENOENT); 1648 OSAddAtomic64(1, &nfsstats.attrcache_misses); 1649 return (ENOENT); 1650 } 1651 if ((flags & NGA_ACL) && ((nowup.tv_sec - np->n_aclstamp) >= timeo)) { 1652 FSDBG(528, np, 0, 0xffffff02, ENOENT); 1653 OSAddAtomic64(1, &nfsstats.attrcache_misses); 1654 return (ENOENT); 1655 } 1656 1657 nvap = &np->n_vattr; 1658 FSDBG(528, np, nvap->nva_size, np->n_size, 0xcace); 1659 OSAddAtomic64(1, &nfsstats.attrcache_hits); 1660 1661 if (nvap->nva_type != VREG) { 1662 np->n_size = nvap->nva_size; 1663 } else if (nvap->nva_size != np->n_size) { 1664 FSDBG(528, np, nvap->nva_size, np->n_size, (nvap->nva_type == VREG) | (np->n_flag & NMODIFIED ? 6 : 4)); 1665 if ((np->n_flag & NMODIFIED) && (nvap->nva_size < np->n_size)) { 1666 /* if we've modified, stick with larger size */ 1667 nvap->nva_size = np->n_size; 1668 } else { 1669 /* 1670 * n_size is protected by the data lock, so we need to 1671 * defer updating it until it's safe. We save the new size 1672 * and set a flag and it'll get updated the next time we get/drop 1673 * the data lock or the next time we do a getattr. 1674 */ 1675 np->n_newsize = nvap->nva_size; 1676 SET(np->n_flag, NUPDATESIZE); 1677 } 1678 } 1679 1680 bcopy((caddr_t)nvap, (caddr_t)nvaper, sizeof(struct nfs_vattr)); 1681 if (np->n_flag & NCHG) { 1682 if (np->n_flag & NACC) { 1683 nvaper->nva_timesec[NFSTIME_ACCESS] = np->n_atim.tv_sec; 1684 nvaper->nva_timensec[NFSTIME_ACCESS] = np->n_atim.tv_nsec; 1685 } 1686 if (np->n_flag & NUPD) { 1687 nvaper->nva_timesec[NFSTIME_MODIFY] = np->n_mtim.tv_sec; 1688 nvaper->nva_timensec[NFSTIME_MODIFY] = np->n_mtim.tv_nsec; 1689 } 1690 } 1691 if (nvap->nva_acl) { 1692 if (flags & NGA_ACL) { 1693 nvaper->nva_acl = kauth_acl_alloc(nvap->nva_acl->acl_entrycount); 1694 if (!nvaper->nva_acl) 1695 return (ENOMEM); 1696 bcopy(nvap->nva_acl, nvaper->nva_acl, KAUTH_ACL_COPYSIZE(nvap->nva_acl)); 1697 } else { 1698 nvaper->nva_acl = NULL; 1699 } 1700 } 1701 return (0); 1702} 1703 1704/* 1705 * When creating file system objects: 1706 * Don't bother setting UID if it's the same as the credential performing the create. 1707 * Don't bother setting GID if it's the same as the directory or credential. 1708 */ 1709void 1710nfs_avoid_needless_id_setting_on_create(nfsnode_t dnp, struct vnode_attr *vap, vfs_context_t ctx) 1711{ 1712 if (VATTR_IS_ACTIVE(vap, va_uid)) { 1713 if (kauth_cred_getuid(vfs_context_ucred(ctx)) == vap->va_uid) { 1714 VATTR_CLEAR_ACTIVE(vap, va_uid); 1715 VATTR_CLEAR_ACTIVE(vap, va_uuuid); 1716 } 1717 } 1718 if (VATTR_IS_ACTIVE(vap, va_gid)) { 1719 if ((vap->va_gid == dnp->n_vattr.nva_gid) || 1720 (kauth_cred_getgid(vfs_context_ucred(ctx)) == vap->va_gid)) { 1721 VATTR_CLEAR_ACTIVE(vap, va_gid); 1722 VATTR_CLEAR_ACTIVE(vap, va_guuid); 1723 } 1724 } 1725} 1726 1727/* 1728 * Convert a universal address string to a sockaddr structure. 1729 * 1730 * Universal addresses can be in the following formats: 1731 * 1732 * d = decimal (IPv4) 1733 * x = hexadecimal (IPv6) 1734 * p = port (decimal) 1735 * 1736 * d.d.d.d 1737 * d.d.d.d.p.p 1738 * x:x:x:x:x:x:x:x 1739 * x:x:x:x:x:x:x:x.p.p 1740 * x:x:x:x:x:x:d.d.d.d 1741 * x:x:x:x:x:x:d.d.d.d.p.p 1742 * 1743 * IPv6 strings can also have a series of zeroes elided 1744 * IPv6 strings can also have a %scope suffix at the end (after any port) 1745 * 1746 * rules & exceptions: 1747 * - value before : is hex 1748 * - value before . is dec 1749 * - once . hit, all values are dec 1750 * - hex+port case means value before first dot is actually hex 1751 * - . is always preceded by digits except if last hex was double-colon 1752 * 1753 * scan, converting #s to bytes 1754 * first time a . is encountered, scan the rest to count them. 1755 * 2 dots = just port 1756 * 3 dots = just IPv4 no port 1757 * 5 dots = IPv4 and port 1758 */ 1759 1760#define IS_DIGIT(C) \ 1761 (((C) >= '0') && ((C) <= '9')) 1762 1763#define IS_XDIGIT(C) \ 1764 (IS_DIGIT(C) || \ 1765 (((C) >= 'A') && ((C) <= 'F')) || \ 1766 (((C) >= 'a') && ((C) <= 'f'))) 1767 1768int 1769nfs_uaddr2sockaddr(const char *uaddr, struct sockaddr *addr) 1770{ 1771 const char *p, *pd; /* pointers to current character in scan */ 1772 const char *pnum; /* pointer to current number to decode */ 1773 const char *pscope; /* pointer to IPv6 scope ID */ 1774 uint8_t a[18]; /* octet array to store address bytes */ 1775 int i; /* index of next octet to decode */ 1776 int dci; /* index of octet to insert double-colon zeroes */ 1777 int dcount, xdcount; /* count of digits in current number */ 1778 int needmore; /* set when we know we need more input (e.g. after colon, period) */ 1779 int dots; /* # of dots */ 1780 int hex; /* contains hex values */ 1781 unsigned long val; /* decoded value */ 1782 int s; /* index used for sliding array to insert elided zeroes */ 1783 1784#define HEXVALUE 0 1785#define DECIMALVALUE 1 1786#define GET(TYPE) \ 1787 do { \ 1788 if ((dcount <= 0) || (dcount > (((TYPE) == DECIMALVALUE) ? 3 : 4))) \ 1789 return (0); \ 1790 if (((TYPE) == DECIMALVALUE) && xdcount) \ 1791 return (0); \ 1792 val = strtoul(pnum, NULL, ((TYPE) == DECIMALVALUE) ? 10 : 16); \ 1793 if (((TYPE) == DECIMALVALUE) && (val >= 256)) \ 1794 return (0); \ 1795 /* check if there is room left in the array */ \ 1796 if (i > (int)(sizeof(a) - (((TYPE) == HEXVALUE) ? 2 : 1) - ((dci != -1) ? 2 : 0))) \ 1797 return (0); \ 1798 if ((TYPE) == HEXVALUE) \ 1799 a[i++] = ((val >> 8) & 0xff); \ 1800 a[i++] = (val & 0xff); \ 1801 } while (0) 1802 1803 hex = 0; 1804 dots = 0; 1805 dci = -1; 1806 i = dcount = xdcount = 0; 1807 pnum = p = uaddr; 1808 pscope = NULL; 1809 needmore = 1; 1810 if ((*p == ':') && (*++p != ':')) /* if it starts with colon, gotta be a double */ 1811 return (0); 1812 1813 while (*p) { 1814 if (IS_XDIGIT(*p)) { 1815 dcount++; 1816 if (!IS_DIGIT(*p)) 1817 xdcount++; 1818 needmore = 0; 1819 p++; 1820 } else if (*p == '.') { 1821 /* rest is decimal IPv4 dotted quad and/or port */ 1822 if (!dots) { 1823 /* this is the first, so count them */ 1824 for (pd = p; *pd; pd++) { 1825 if (*pd == '.') { 1826 if (++dots > 5) 1827 return (0); 1828 } else if (hex && (*pd == '%')) { 1829 break; 1830 } else if ((*pd < '0') || (*pd > '9')) { 1831 return (0); 1832 } 1833 } 1834 if ((dots != 2) && (dots != 3) && (dots != 5)) 1835 return (0); 1836 if (hex && (dots == 2)) { /* hex+port */ 1837 if (!dcount && needmore) 1838 return (0); 1839 if (dcount) /* last hex may be elided zero */ 1840 GET(HEXVALUE); 1841 } else { 1842 GET(DECIMALVALUE); 1843 } 1844 } else { 1845 GET(DECIMALVALUE); 1846 } 1847 dcount = xdcount = 0; 1848 needmore = 1; 1849 pnum = ++p; 1850 } else if (*p == ':') { 1851 hex = 1; 1852 if (dots) 1853 return (0); 1854 if (!dcount) { /* missing number, probably double colon */ 1855 if (dci >= 0) /* can only have one double colon */ 1856 return (0); 1857 dci = i; 1858 needmore = 0; 1859 } else { 1860 GET(HEXVALUE); 1861 dcount = xdcount = 0; 1862 needmore = 1; 1863 } 1864 pnum = ++p; 1865 } else if (*p == '%') { /* scope ID delimiter */ 1866 if (!hex) 1867 return (0); 1868 p++; 1869 pscope = p; 1870 break; 1871 } else { /* unexpected character */ 1872 return (0); 1873 } 1874 } 1875 if (needmore && !dcount) 1876 return (0); 1877 if (dcount) /* decode trailing number */ 1878 GET(dots ? DECIMALVALUE : HEXVALUE); 1879 if (dci >= 0) { /* got a double-colon at i, need to insert a range of zeroes */ 1880 /* if we got a port, slide to end of array */ 1881 /* otherwise, slide to end of address (non-port) values */ 1882 int end = ((dots == 2) || (dots == 5)) ? sizeof(a) : (sizeof(a) - 2); 1883 if (i % 2) /* length of zero range must be multiple of 2 */ 1884 return (0); 1885 if (i >= end) /* no room? */ 1886 return (0); 1887 /* slide (i-dci) numbers up from index dci */ 1888 for (s=0; s < (i - dci); s++) 1889 a[end-1-s] = a[i-1-s]; 1890 /* zero (end-i) numbers at index dci */ 1891 for (s=0; s < (end - i); s++) 1892 a[dci+s] = 0; 1893 i = end; 1894 } 1895 1896 /* copy out resulting socket address */ 1897 if (hex) { 1898 struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)addr; 1899 if ((((dots == 0) || (dots == 3)) && (i != (sizeof(a)-2)))) 1900 return (0); 1901 if ((((dots == 2) || (dots == 5)) && (i != sizeof(a)))) 1902 return (0); 1903 bzero(sin6, sizeof(struct sockaddr_in6)); 1904 sin6->sin6_len = sizeof(struct sockaddr_in6); 1905 sin6->sin6_family = AF_INET6; 1906 bcopy(a, &sin6->sin6_addr.s6_addr, sizeof(struct in6_addr)); 1907 if ((dots == 5) || (dots == 2)) 1908 sin6->sin6_port = htons((a[16] << 8) | a[17]); 1909 if (pscope) { 1910 for (p=pscope; IS_DIGIT(*p); p++) 1911 ; 1912 if (*p && !IS_DIGIT(*p)) { /* name */ 1913 ifnet_t interface = NULL; 1914 if (ifnet_find_by_name(pscope, &interface) == 0) 1915 sin6->sin6_scope_id = ifnet_index(interface); 1916 if (interface) 1917 ifnet_release(interface); 1918 } else { /* decimal number */ 1919 sin6->sin6_scope_id = strtoul(pscope, NULL, 10); 1920 } 1921 /* XXX should we also embed scope id for linklocal? */ 1922 } 1923 } else { 1924 struct sockaddr_in *sin = (struct sockaddr_in*)addr; 1925 if ((dots != 3) && (dots != 5)) 1926 return (0); 1927 if ((dots == 3) && (i != 4)) 1928 return (0); 1929 if ((dots == 5) && (i != 6)) 1930 return (0); 1931 bzero(sin, sizeof(struct sockaddr_in)); 1932 sin->sin_len = sizeof(struct sockaddr_in); 1933 sin->sin_family = AF_INET; 1934 bcopy(a, &sin->sin_addr.s_addr, sizeof(struct in_addr)); 1935 if (dots == 5) 1936 sin->sin_port = htons((a[4] << 8) | a[5]); 1937 } 1938 return (1); 1939} 1940 1941 1942#endif /* NFSCLIENT */ 1943 1944/* 1945 * Schedule a callout thread to run an NFS timer function 1946 * interval milliseconds in the future. 1947 */ 1948void 1949nfs_interval_timer_start(thread_call_t call, int interval) 1950{ 1951 uint64_t deadline; 1952 1953 clock_interval_to_deadline(interval, 1000 * 1000, &deadline); 1954 thread_call_enter_delayed(call, deadline); 1955} 1956 1957 1958#if NFSSERVER 1959 1960int nfsrv_cmp_secflavs(struct nfs_sec *, struct nfs_sec *); 1961int nfsrv_hang_addrlist(struct nfs_export *, struct user_nfs_export_args *); 1962int nfsrv_free_netopt(struct radix_node *, void *); 1963int nfsrv_free_addrlist(struct nfs_export *, struct user_nfs_export_args *); 1964struct nfs_export_options *nfsrv_export_lookup(struct nfs_export *, mbuf_t); 1965struct nfs_export *nfsrv_fhtoexport(struct nfs_filehandle *); 1966struct nfs_user_stat_node *nfsrv_get_user_stat_node(struct nfs_active_user_list *, struct sockaddr *, uid_t); 1967void nfsrv_init_user_list(struct nfs_active_user_list *); 1968void nfsrv_free_user_list(struct nfs_active_user_list *); 1969 1970/* 1971 * add NFSv3 WCC data to an mbuf chain 1972 */ 1973int 1974nfsm_chain_add_wcc_data_f( 1975 struct nfsrv_descript *nd, 1976 struct nfsm_chain *nmc, 1977 int preattrerr, 1978 struct vnode_attr *prevap, 1979 int postattrerr, 1980 struct vnode_attr *postvap) 1981{ 1982 int error = 0; 1983 1984 if (preattrerr) { 1985 nfsm_chain_add_32(error, nmc, FALSE); 1986 } else { 1987 nfsm_chain_add_32(error, nmc, TRUE); 1988 nfsm_chain_add_64(error, nmc, prevap->va_data_size); 1989 nfsm_chain_add_time(error, nmc, NFS_VER3, &prevap->va_modify_time); 1990 nfsm_chain_add_time(error, nmc, NFS_VER3, &prevap->va_change_time); 1991 } 1992 nfsm_chain_add_postop_attr(error, nd, nmc, postattrerr, postvap); 1993 1994 return (error); 1995} 1996 1997/* 1998 * Extract a lookup path from the given mbufs and store it in 1999 * a newly allocated buffer saved in the given nameidata structure. 2000 */ 2001int 2002nfsm_chain_get_path_namei( 2003 struct nfsm_chain *nmc, 2004 uint32_t len, 2005 struct nameidata *nip) 2006{ 2007 struct componentname *cnp = &nip->ni_cnd; 2008 int error = 0; 2009 char *cp; 2010 2011 if (len > (MAXPATHLEN - 1)) 2012 return (ENAMETOOLONG); 2013 2014 /* 2015 * Get a buffer for the name to be translated, and copy the 2016 * name into the buffer. 2017 */ 2018 MALLOC_ZONE(cnp->cn_pnbuf, caddr_t, MAXPATHLEN, M_NAMEI, M_WAITOK); 2019 if (!cnp->cn_pnbuf) 2020 return (ENOMEM); 2021 cnp->cn_pnlen = MAXPATHLEN; 2022 cnp->cn_flags |= HASBUF; 2023 2024 /* Copy the name from the mbuf list to the string */ 2025 cp = cnp->cn_pnbuf; 2026 nfsm_chain_get_opaque(error, nmc, len, cp); 2027 if (error) 2028 goto out; 2029 cnp->cn_pnbuf[len] = '\0'; 2030 2031 /* sanity check the string */ 2032 if ((strlen(cp) != len) || strchr(cp, '/')) 2033 error = EACCES; 2034out: 2035 if (error) { 2036 if (cnp->cn_pnbuf) 2037 FREE_ZONE(cnp->cn_pnbuf, MAXPATHLEN, M_NAMEI); 2038 cnp->cn_flags &= ~HASBUF; 2039 } else { 2040 nip->ni_pathlen = len; 2041 } 2042 return (error); 2043} 2044 2045/* 2046 * Set up nameidata for a lookup() call and do it. 2047 */ 2048int 2049nfsrv_namei( 2050 struct nfsrv_descript *nd, 2051 vfs_context_t ctx, 2052 struct nameidata *nip, 2053 struct nfs_filehandle *nfhp, 2054 vnode_t *retdirp, 2055 struct nfs_export **nxp, 2056 struct nfs_export_options **nxop) 2057{ 2058 vnode_t dp; 2059 int error; 2060 struct componentname *cnp = &nip->ni_cnd; 2061 uint32_t cnflags; 2062 char *tmppn; 2063 2064 *retdirp = NULL; 2065 2066 /* 2067 * Extract and set starting directory. 2068 */ 2069 error = nfsrv_fhtovp(nfhp, nd, &dp, nxp, nxop); 2070 if (error) 2071 goto out; 2072 error = nfsrv_credcheck(nd, ctx, *nxp, *nxop); 2073 if (error || (vnode_vtype(dp) != VDIR)) { 2074 vnode_put(dp); 2075 error = ENOTDIR; 2076 goto out; 2077 } 2078 *retdirp = dp; 2079 2080 nip->ni_cnd.cn_context = ctx; 2081 2082 if (*nxop && ((*nxop)->nxo_flags & NX_READONLY)) 2083 cnp->cn_flags |= RDONLY; 2084 2085 cnp->cn_flags |= NOCROSSMOUNT; 2086 cnp->cn_nameptr = cnp->cn_pnbuf; 2087 nip->ni_usedvp = nip->ni_startdir = dp; 2088 2089 /* 2090 * And call lookup() to do the real work 2091 */ 2092 cnflags = nip->ni_cnd.cn_flags; /* store in case we have to restore */ 2093 while ((error = lookup(nip)) == ERECYCLE) { 2094 nip->ni_cnd.cn_flags = cnflags; 2095 cnp->cn_nameptr = cnp->cn_pnbuf; 2096 nip->ni_usedvp = nip->ni_dvp = nip->ni_startdir = dp; 2097 } 2098 if (error) 2099 goto out; 2100 2101 /* Check for encountering a symbolic link */ 2102 if (cnp->cn_flags & ISSYMLINK) { 2103#if CONFIG_VFS_FUNNEL 2104 if ((cnp->cn_flags & FSNODELOCKHELD)) { 2105 cnp->cn_flags &= ~FSNODELOCKHELD; 2106 unlock_fsnode(nip->ni_dvp, NULL); 2107 } 2108#endif /* CONFIG_VFS_FUNNEL */ 2109 if (cnp->cn_flags & (LOCKPARENT | WANTPARENT)) 2110 vnode_put(nip->ni_dvp); 2111 if (nip->ni_vp) { 2112 vnode_put(nip->ni_vp); 2113 nip->ni_vp = NULL; 2114 } 2115 error = EINVAL; 2116 } 2117out: 2118 if (error) { 2119 tmppn = cnp->cn_pnbuf; 2120 cnp->cn_pnbuf = NULL; 2121 cnp->cn_flags &= ~HASBUF; 2122 FREE_ZONE(tmppn, cnp->cn_pnlen, M_NAMEI); 2123 } 2124 return (error); 2125} 2126 2127/* 2128 * A fiddled version of m_adj() that ensures null fill to a 4-byte 2129 * boundary and only trims off the back end 2130 */ 2131void 2132nfsm_adj(mbuf_t mp, int len, int nul) 2133{ 2134 mbuf_t m, mnext; 2135 int count, i, mlen; 2136 char *cp; 2137 2138 /* 2139 * Trim from tail. Scan the mbuf chain, 2140 * calculating its length and finding the last mbuf. 2141 * If the adjustment only affects this mbuf, then just 2142 * adjust and return. Otherwise, rescan and truncate 2143 * after the remaining size. 2144 */ 2145 count = 0; 2146 m = mp; 2147 for (;;) { 2148 mlen = mbuf_len(m); 2149 count += mlen; 2150 mnext = mbuf_next(m); 2151 if (mnext == NULL) 2152 break; 2153 m = mnext; 2154 } 2155 if (mlen > len) { 2156 mlen -= len; 2157 mbuf_setlen(m, mlen); 2158 if (nul > 0) { 2159 cp = (caddr_t)mbuf_data(m) + mlen - nul; 2160 for (i = 0; i < nul; i++) 2161 *cp++ = '\0'; 2162 } 2163 return; 2164 } 2165 count -= len; 2166 if (count < 0) 2167 count = 0; 2168 /* 2169 * Correct length for chain is "count". 2170 * Find the mbuf with last data, adjust its length, 2171 * and toss data from remaining mbufs on chain. 2172 */ 2173 for (m = mp; m; m = mbuf_next(m)) { 2174 mlen = mbuf_len(m); 2175 if (mlen >= count) { 2176 mlen = count; 2177 mbuf_setlen(m, count); 2178 if (nul > 0) { 2179 cp = (caddr_t)mbuf_data(m) + mlen - nul; 2180 for (i = 0; i < nul; i++) 2181 *cp++ = '\0'; 2182 } 2183 break; 2184 } 2185 count -= mlen; 2186 } 2187 for (m = mbuf_next(m); m; m = mbuf_next(m)) 2188 mbuf_setlen(m, 0); 2189} 2190 2191/* 2192 * Trim the header out of the mbuf list and trim off any trailing 2193 * junk so that the mbuf list has only the write data. 2194 */ 2195int 2196nfsm_chain_trim_data(struct nfsm_chain *nmc, int len, int *mlen) 2197{ 2198 int cnt = 0, dlen, adjust; 2199 caddr_t data; 2200 mbuf_t m; 2201 2202 if (mlen) 2203 *mlen = 0; 2204 2205 /* trim header */ 2206 for (m = nmc->nmc_mhead; m && (m != nmc->nmc_mcur); m = mbuf_next(m)) 2207 mbuf_setlen(m, 0); 2208 if (!m) 2209 return (EIO); 2210 2211 /* trim current mbuf */ 2212 data = mbuf_data(m); 2213 dlen = mbuf_len(m); 2214 adjust = nmc->nmc_ptr - data; 2215 dlen -= adjust; 2216 if ((dlen > 0) && (adjust > 0)) { 2217 if (mbuf_setdata(m, nmc->nmc_ptr, dlen)) 2218 return(EIO); 2219 } else 2220 mbuf_setlen(m, dlen); 2221 2222 /* skip next len bytes */ 2223 for (; m && (cnt < len); m = mbuf_next(m)) { 2224 dlen = mbuf_len(m); 2225 cnt += dlen; 2226 if (cnt > len) { 2227 /* truncate to end of data */ 2228 mbuf_setlen(m, dlen - (cnt - len)); 2229 if (m == nmc->nmc_mcur) 2230 nmc->nmc_left -= (cnt - len); 2231 cnt = len; 2232 } 2233 } 2234 if (mlen) 2235 *mlen = cnt; 2236 2237 /* trim any trailing data */ 2238 if (m == nmc->nmc_mcur) 2239 nmc->nmc_left = 0; 2240 for (; m; m = mbuf_next(m)) 2241 mbuf_setlen(m, 0); 2242 2243 return (0); 2244} 2245 2246int 2247nfsm_chain_add_fattr( 2248 struct nfsrv_descript *nd, 2249 struct nfsm_chain *nmc, 2250 struct vnode_attr *vap) 2251{ 2252 int error = 0; 2253 2254 // XXX Should we assert here that all fields are supported? 2255 2256 nfsm_chain_add_32(error, nmc, vtonfs_type(vap->va_type, nd->nd_vers)); 2257 if (nd->nd_vers == NFS_VER3) { 2258 nfsm_chain_add_32(error, nmc, vap->va_mode & 07777); 2259 } else { 2260 nfsm_chain_add_32(error, nmc, vtonfsv2_mode(vap->va_type, vap->va_mode)); 2261 } 2262 nfsm_chain_add_32(error, nmc, vap->va_nlink); 2263 nfsm_chain_add_32(error, nmc, vap->va_uid); 2264 nfsm_chain_add_32(error, nmc, vap->va_gid); 2265 if (nd->nd_vers == NFS_VER3) { 2266 nfsm_chain_add_64(error, nmc, vap->va_data_size); 2267 nfsm_chain_add_64(error, nmc, vap->va_data_alloc); 2268 nfsm_chain_add_32(error, nmc, major(vap->va_rdev)); 2269 nfsm_chain_add_32(error, nmc, minor(vap->va_rdev)); 2270 nfsm_chain_add_64(error, nmc, vap->va_fsid); 2271 nfsm_chain_add_64(error, nmc, vap->va_fileid); 2272 } else { 2273 nfsm_chain_add_32(error, nmc, vap->va_data_size); 2274 nfsm_chain_add_32(error, nmc, NFS_FABLKSIZE); 2275 if (vap->va_type == VFIFO) 2276 nfsm_chain_add_32(error, nmc, 0xffffffff); 2277 else 2278 nfsm_chain_add_32(error, nmc, vap->va_rdev); 2279 nfsm_chain_add_32(error, nmc, vap->va_data_alloc / NFS_FABLKSIZE); 2280 nfsm_chain_add_32(error, nmc, vap->va_fsid); 2281 nfsm_chain_add_32(error, nmc, vap->va_fileid); 2282 } 2283 nfsm_chain_add_time(error, nmc, nd->nd_vers, &vap->va_access_time); 2284 nfsm_chain_add_time(error, nmc, nd->nd_vers, &vap->va_modify_time); 2285 nfsm_chain_add_time(error, nmc, nd->nd_vers, &vap->va_change_time); 2286 2287 return (error); 2288} 2289 2290int 2291nfsm_chain_get_sattr( 2292 struct nfsrv_descript *nd, 2293 struct nfsm_chain *nmc, 2294 struct vnode_attr *vap) 2295{ 2296 int error = 0; 2297 uint32_t val = 0; 2298 uint64_t val64; 2299 struct timespec now; 2300 2301 if (nd->nd_vers == NFS_VER2) { 2302 /* 2303 * There is/was a bug in the Sun client that puts 0xffff in the mode 2304 * field of sattr when it should put in 0xffffffff. The u_short 2305 * doesn't sign extend. So check the low order 2 bytes for 0xffff. 2306 */ 2307 nfsm_chain_get_32(error, nmc, val); 2308 if ((val & 0xffff) != 0xffff) { 2309 VATTR_SET(vap, va_mode, val & 07777); 2310 /* save the "type" bits for NFSv2 create */ 2311 VATTR_SET(vap, va_type, IFTOVT(val)); 2312 VATTR_CLEAR_ACTIVE(vap, va_type); 2313 } 2314 nfsm_chain_get_32(error, nmc, val); 2315 if (val != (uint32_t)-1) 2316 VATTR_SET(vap, va_uid, val); 2317 nfsm_chain_get_32(error, nmc, val); 2318 if (val != (uint32_t)-1) 2319 VATTR_SET(vap, va_gid, val); 2320 /* save the "size" bits for NFSv2 create (even if they appear unset) */ 2321 nfsm_chain_get_32(error, nmc, val); 2322 VATTR_SET(vap, va_data_size, val); 2323 if (val == (uint32_t)-1) 2324 VATTR_CLEAR_ACTIVE(vap, va_data_size); 2325 nfsm_chain_get_time(error, nmc, NFS_VER2, 2326 vap->va_access_time.tv_sec, 2327 vap->va_access_time.tv_nsec); 2328 if (vap->va_access_time.tv_sec != -1) 2329 VATTR_SET_ACTIVE(vap, va_access_time); 2330 nfsm_chain_get_time(error, nmc, NFS_VER2, 2331 vap->va_modify_time.tv_sec, 2332 vap->va_modify_time.tv_nsec); 2333 if (vap->va_modify_time.tv_sec != -1) 2334 VATTR_SET_ACTIVE(vap, va_modify_time); 2335 return (error); 2336 } 2337 2338 /* NFSv3 */ 2339 nfsm_chain_get_32(error, nmc, val); 2340 if (val) { 2341 nfsm_chain_get_32(error, nmc, val); 2342 VATTR_SET(vap, va_mode, val & 07777); 2343 } 2344 nfsm_chain_get_32(error, nmc, val); 2345 if (val) { 2346 nfsm_chain_get_32(error, nmc, val); 2347 VATTR_SET(vap, va_uid, val); 2348 } 2349 nfsm_chain_get_32(error, nmc, val); 2350 if (val) { 2351 nfsm_chain_get_32(error, nmc, val); 2352 VATTR_SET(vap, va_gid, val); 2353 } 2354 nfsm_chain_get_32(error, nmc, val); 2355 if (val) { 2356 nfsm_chain_get_64(error, nmc, val64); 2357 VATTR_SET(vap, va_data_size, val64); 2358 } 2359 nanotime(&now); 2360 nfsm_chain_get_32(error, nmc, val); 2361 switch (val) { 2362 case NFS_TIME_SET_TO_CLIENT: 2363 nfsm_chain_get_time(error, nmc, nd->nd_vers, 2364 vap->va_access_time.tv_sec, 2365 vap->va_access_time.tv_nsec); 2366 VATTR_SET_ACTIVE(vap, va_access_time); 2367 vap->va_vaflags &= ~VA_UTIMES_NULL; 2368 break; 2369 case NFS_TIME_SET_TO_SERVER: 2370 VATTR_SET(vap, va_access_time, now); 2371 vap->va_vaflags |= VA_UTIMES_NULL; 2372 break; 2373 } 2374 nfsm_chain_get_32(error, nmc, val); 2375 switch (val) { 2376 case NFS_TIME_SET_TO_CLIENT: 2377 nfsm_chain_get_time(error, nmc, nd->nd_vers, 2378 vap->va_modify_time.tv_sec, 2379 vap->va_modify_time.tv_nsec); 2380 VATTR_SET_ACTIVE(vap, va_modify_time); 2381 vap->va_vaflags &= ~VA_UTIMES_NULL; 2382 break; 2383 case NFS_TIME_SET_TO_SERVER: 2384 VATTR_SET(vap, va_modify_time, now); 2385 if (!VATTR_IS_ACTIVE(vap, va_access_time)) 2386 vap->va_vaflags |= VA_UTIMES_NULL; 2387 break; 2388 } 2389 2390 return (error); 2391} 2392 2393/* 2394 * Compare two security flavor structs 2395 */ 2396int 2397nfsrv_cmp_secflavs(struct nfs_sec *sf1, struct nfs_sec *sf2) 2398{ 2399 int i; 2400 2401 if (sf1->count != sf2->count) 2402 return 1; 2403 for (i = 0; i < sf1->count; i++) 2404 if (sf1->flavors[i] != sf2->flavors[i]) 2405 return 1; 2406 return 0; 2407} 2408 2409/* 2410 * Build hash lists of net addresses and hang them off the NFS export. 2411 * Called by nfsrv_export() to set up the lists of export addresses. 2412 */ 2413int 2414nfsrv_hang_addrlist(struct nfs_export *nx, struct user_nfs_export_args *unxa) 2415{ 2416 struct nfs_export_net_args nxna; 2417 struct nfs_netopt *no, *rn_no; 2418 struct radix_node_head *rnh; 2419 struct radix_node *rn; 2420 struct sockaddr *saddr, *smask; 2421 struct domain *dom; 2422 int i, error; 2423 unsigned int net; 2424 user_addr_t uaddr; 2425 kauth_cred_t cred; 2426 2427 uaddr = unxa->nxa_nets; 2428 for (net = 0; net < unxa->nxa_netcount; net++, uaddr += sizeof(nxna)) { 2429 error = copyin(uaddr, &nxna, sizeof(nxna)); 2430 if (error) 2431 return (error); 2432 2433 if (nxna.nxna_flags & (NX_MAPROOT|NX_MAPALL)) { 2434 struct posix_cred temp_pcred; 2435 bzero(&temp_pcred, sizeof(temp_pcred)); 2436 temp_pcred.cr_uid = nxna.nxna_cred.cr_uid; 2437 temp_pcred.cr_ngroups = nxna.nxna_cred.cr_ngroups; 2438 for (i=0; i < nxna.nxna_cred.cr_ngroups && i < NGROUPS; i++) 2439 temp_pcred.cr_groups[i] = nxna.nxna_cred.cr_groups[i]; 2440 cred = posix_cred_create(&temp_pcred); 2441 if (!IS_VALID_CRED(cred)) 2442 return (ENOMEM); 2443 } else { 2444 cred = NOCRED; 2445 } 2446 2447 if (nxna.nxna_addr.ss_len == 0) { 2448 /* No address means this is a default/world export */ 2449 if (nx->nx_flags & NX_DEFAULTEXPORT) { 2450 if (IS_VALID_CRED(cred)) 2451 kauth_cred_unref(&cred); 2452 return (EEXIST); 2453 } 2454 nx->nx_flags |= NX_DEFAULTEXPORT; 2455 nx->nx_defopt.nxo_flags = nxna.nxna_flags; 2456 nx->nx_defopt.nxo_cred = cred; 2457 bcopy(&nxna.nxna_sec, &nx->nx_defopt.nxo_sec, sizeof(struct nfs_sec)); 2458 nx->nx_expcnt++; 2459 continue; 2460 } 2461 2462 i = sizeof(struct nfs_netopt); 2463 i += nxna.nxna_addr.ss_len + nxna.nxna_mask.ss_len; 2464 MALLOC(no, struct nfs_netopt *, i, M_NETADDR, M_WAITOK); 2465 if (!no) { 2466 if (IS_VALID_CRED(cred)) 2467 kauth_cred_unref(&cred); 2468 return (ENOMEM); 2469 } 2470 bzero(no, sizeof(struct nfs_netopt)); 2471 no->no_opt.nxo_flags = nxna.nxna_flags; 2472 no->no_opt.nxo_cred = cred; 2473 bcopy(&nxna.nxna_sec, &no->no_opt.nxo_sec, sizeof(struct nfs_sec)); 2474 2475 saddr = (struct sockaddr *)(no + 1); 2476 bcopy(&nxna.nxna_addr, saddr, nxna.nxna_addr.ss_len); 2477 if (nxna.nxna_mask.ss_len) { 2478 smask = (struct sockaddr *)((caddr_t)saddr + nxna.nxna_addr.ss_len); 2479 bcopy(&nxna.nxna_mask, smask, nxna.nxna_mask.ss_len); 2480 } else { 2481 smask = NULL; 2482 } 2483 i = saddr->sa_family; 2484 if ((rnh = nx->nx_rtable[i]) == 0) { 2485 /* 2486 * Seems silly to initialize every AF when most are not 2487 * used, do so on demand here 2488 */ 2489 for (dom = domains; dom; dom = dom->dom_next) 2490 if (dom->dom_family == i && dom->dom_rtattach) { 2491 dom->dom_rtattach((void **)&nx->nx_rtable[i], 2492 dom->dom_rtoffset); 2493 break; 2494 } 2495 if ((rnh = nx->nx_rtable[i]) == 0) { 2496 if (IS_VALID_CRED(cred)) 2497 kauth_cred_unref(&cred); 2498 _FREE(no, M_NETADDR); 2499 return (ENOBUFS); 2500 } 2501 } 2502 rn = (*rnh->rnh_addaddr)((caddr_t)saddr, (caddr_t)smask, rnh, no->no_rnodes); 2503 if (rn == 0) { 2504 /* 2505 * One of the reasons that rnh_addaddr may fail is that 2506 * the entry already exists. To check for this case, we 2507 * look up the entry to see if it is there. If so, we 2508 * do not need to make a new entry but do continue. 2509 * 2510 * XXX should this be rnh_lookup() instead? 2511 */ 2512 int matched = 0; 2513 rn = (*rnh->rnh_matchaddr)((caddr_t)saddr, rnh); 2514 rn_no = (struct nfs_netopt *)rn; 2515 if (rn != 0 && (rn->rn_flags & RNF_ROOT) == 0 && 2516 (rn_no->no_opt.nxo_flags == nxna.nxna_flags) && 2517 (!nfsrv_cmp_secflavs(&rn_no->no_opt.nxo_sec, &nxna.nxna_sec))) { 2518 kauth_cred_t cred2 = rn_no->no_opt.nxo_cred; 2519 if (cred == cred2) { 2520 /* creds are same (or both NULL) */ 2521 matched = 1; 2522 } else if (cred && cred2 && (kauth_cred_getuid(cred) == kauth_cred_getuid(cred2))) { 2523 /* 2524 * Now compare the effective and 2525 * supplementary groups... 2526 * 2527 * Note: This comparison, as written, 2528 * does not correctly indicate that 2529 * the groups are equivalent, since 2530 * other than the first supplementary 2531 * group, which is also the effective 2532 * group, order on the remaining groups 2533 * doesn't matter, and this is an 2534 * ordered compare. 2535 */ 2536 gid_t groups[NGROUPS]; 2537 gid_t groups2[NGROUPS]; 2538 int groupcount = NGROUPS; 2539 int group2count = NGROUPS; 2540 2541 if (!kauth_cred_getgroups(cred, groups, &groupcount) && 2542 !kauth_cred_getgroups(cred2, groups2, &group2count) && 2543 groupcount == group2count) { 2544 for (i=0; i < group2count; i++) 2545 if (groups[i] != groups2[i]) 2546 break; 2547 if (i >= group2count || i >= NGROUPS) 2548 matched = 1; 2549 } 2550 } 2551 } 2552 if (IS_VALID_CRED(cred)) 2553 kauth_cred_unref(&cred); 2554 _FREE(no, M_NETADDR); 2555 if (matched) 2556 continue; 2557 return (EPERM); 2558 } 2559 nx->nx_expcnt++; 2560 } 2561 2562 return (0); 2563} 2564 2565/* 2566 * In order to properly track an export's netopt count, we need to pass 2567 * an additional argument to nfsrv_free_netopt() so that it can decrement 2568 * the export's netopt count. 2569 */ 2570struct nfsrv_free_netopt_arg { 2571 uint32_t *cnt; 2572 struct radix_node_head *rnh; 2573}; 2574 2575int 2576nfsrv_free_netopt(struct radix_node *rn, void *w) 2577{ 2578 struct nfsrv_free_netopt_arg *fna = (struct nfsrv_free_netopt_arg *)w; 2579 struct radix_node_head *rnh = fna->rnh; 2580 uint32_t *cnt = fna->cnt; 2581 struct nfs_netopt *nno = (struct nfs_netopt *)rn; 2582 2583 (*rnh->rnh_deladdr)(rn->rn_key, rn->rn_mask, rnh); 2584 if (IS_VALID_CRED(nno->no_opt.nxo_cred)) 2585 kauth_cred_unref(&nno->no_opt.nxo_cred); 2586 _FREE((caddr_t)rn, M_NETADDR); 2587 *cnt -= 1; 2588 return (0); 2589} 2590 2591/* 2592 * Free the net address hash lists that are hanging off the mount points. 2593 */ 2594int 2595nfsrv_free_addrlist(struct nfs_export *nx, struct user_nfs_export_args *unxa) 2596{ 2597 struct nfs_export_net_args nxna; 2598 struct radix_node_head *rnh; 2599 struct radix_node *rn; 2600 struct nfsrv_free_netopt_arg fna; 2601 struct nfs_netopt *nno; 2602 user_addr_t uaddr; 2603 unsigned int net; 2604 int i, error; 2605 2606 if (!unxa || !unxa->nxa_netcount) { 2607 /* delete everything */ 2608 for (i = 0; i <= AF_MAX; i++) 2609 if ( (rnh = nx->nx_rtable[i]) ) { 2610 fna.rnh = rnh; 2611 fna.cnt = &nx->nx_expcnt; 2612 (*rnh->rnh_walktree)(rnh, nfsrv_free_netopt, (caddr_t)&fna); 2613 _FREE((caddr_t)rnh, M_RTABLE); 2614 nx->nx_rtable[i] = 0; 2615 } 2616 return (0); 2617 } 2618 2619 /* delete only the exports specified */ 2620 uaddr = unxa->nxa_nets; 2621 for (net = 0; net < unxa->nxa_netcount; net++, uaddr += sizeof(nxna)) { 2622 error = copyin(uaddr, &nxna, sizeof(nxna)); 2623 if (error) 2624 return (error); 2625 2626 if (nxna.nxna_addr.ss_len == 0) { 2627 /* No address means this is a default/world export */ 2628 if (nx->nx_flags & NX_DEFAULTEXPORT) { 2629 nx->nx_flags &= ~NX_DEFAULTEXPORT; 2630 if (IS_VALID_CRED(nx->nx_defopt.nxo_cred)) { 2631 kauth_cred_unref(&nx->nx_defopt.nxo_cred); 2632 } 2633 nx->nx_expcnt--; 2634 } 2635 continue; 2636 } 2637 2638 if ((rnh = nx->nx_rtable[nxna.nxna_addr.ss_family]) == 0) { 2639 /* AF not initialized? */ 2640 if (!(unxa->nxa_flags & NXA_ADD)) 2641 printf("nfsrv_free_addrlist: address not found (0)\n"); 2642 continue; 2643 } 2644 2645 rn = (*rnh->rnh_lookup)(&nxna.nxna_addr, 2646 nxna.nxna_mask.ss_len ? &nxna.nxna_mask : NULL, rnh); 2647 if (!rn || (rn->rn_flags & RNF_ROOT)) { 2648 if (!(unxa->nxa_flags & NXA_ADD)) 2649 printf("nfsrv_free_addrlist: address not found (1)\n"); 2650 continue; 2651 } 2652 2653 (*rnh->rnh_deladdr)(rn->rn_key, rn->rn_mask, rnh); 2654 nno = (struct nfs_netopt *)rn; 2655 if (IS_VALID_CRED(nno->no_opt.nxo_cred)) 2656 kauth_cred_unref(&nno->no_opt.nxo_cred); 2657 _FREE((caddr_t)rn, M_NETADDR); 2658 2659 nx->nx_expcnt--; 2660 if (nx->nx_expcnt == ((nx->nx_flags & NX_DEFAULTEXPORT) ? 1 : 0)) { 2661 /* no more entries in rnh, so free it up */ 2662 _FREE((caddr_t)rnh, M_RTABLE); 2663 nx->nx_rtable[nxna.nxna_addr.ss_family] = 0; 2664 } 2665 } 2666 2667 return (0); 2668} 2669 2670void enablequotas(struct mount *mp, vfs_context_t ctx); // XXX 2671 2672int 2673nfsrv_export(struct user_nfs_export_args *unxa, vfs_context_t ctx) 2674{ 2675 int error = 0; 2676 size_t pathlen; 2677 struct nfs_exportfs *nxfs, *nxfs2, *nxfs3; 2678 struct nfs_export *nx, *nx2, *nx3; 2679 struct nfs_filehandle nfh; 2680 struct nameidata mnd, xnd; 2681 vnode_t mvp = NULL, xvp = NULL; 2682 mount_t mp = NULL; 2683 char path[MAXPATHLEN]; 2684 int expisroot; 2685 2686 if (unxa->nxa_flags == NXA_CHECK) { 2687 /* just check if the path is an NFS-exportable file system */ 2688 error = copyinstr(unxa->nxa_fspath, path, MAXPATHLEN, &pathlen); 2689 if (error) 2690 return (error); 2691 NDINIT(&mnd, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, 2692 UIO_SYSSPACE, CAST_USER_ADDR_T(path), ctx); 2693 error = namei(&mnd); 2694 if (error) 2695 return (error); 2696 mvp = mnd.ni_vp; 2697 mp = vnode_mount(mvp); 2698 /* make sure it's the root of a file system */ 2699 if (!vnode_isvroot(mvp)) 2700 error = EINVAL; 2701 /* make sure the file system is NFS-exportable */ 2702 if (!error) { 2703 nfh.nfh_len = NFSV3_MAX_FID_SIZE; 2704 error = VFS_VPTOFH(mvp, (int*)&nfh.nfh_len, &nfh.nfh_fid[0], NULL); 2705 } 2706 if (!error && (nfh.nfh_len > (int)NFSV3_MAX_FID_SIZE)) 2707 error = EIO; 2708 if (!error && !(mp->mnt_vtable->vfc_vfsflags & VFC_VFSREADDIR_EXTENDED)) 2709 error = EISDIR; 2710 vnode_put(mvp); 2711 nameidone(&mnd); 2712 return (error); 2713 } 2714 2715 /* all other operations: must be super user */ 2716 if ((error = vfs_context_suser(ctx))) 2717 return (error); 2718 2719 if (unxa->nxa_flags & NXA_DELETE_ALL) { 2720 /* delete all exports on all file systems */ 2721 lck_rw_lock_exclusive(&nfsrv_export_rwlock); 2722 while ((nxfs = LIST_FIRST(&nfsrv_exports))) { 2723 mp = vfs_getvfs_by_mntonname(nxfs->nxfs_path); 2724 if (mp) { 2725 vfs_clearflags(mp, MNT_EXPORTED); 2726 mount_iterdrop(mp); 2727 mp = NULL; 2728 } 2729 /* delete all exports on this file system */ 2730 while ((nx = LIST_FIRST(&nxfs->nxfs_exports))) { 2731 LIST_REMOVE(nx, nx_next); 2732 LIST_REMOVE(nx, nx_hash); 2733 /* delete all netopts for this export */ 2734 nfsrv_free_addrlist(nx, NULL); 2735 nx->nx_flags &= ~NX_DEFAULTEXPORT; 2736 if (IS_VALID_CRED(nx->nx_defopt.nxo_cred)) { 2737 kauth_cred_unref(&nx->nx_defopt.nxo_cred); 2738 } 2739 /* free active user list for this export */ 2740 nfsrv_free_user_list(&nx->nx_user_list); 2741 FREE(nx->nx_path, M_TEMP); 2742 FREE(nx, M_TEMP); 2743 } 2744 LIST_REMOVE(nxfs, nxfs_next); 2745 FREE(nxfs->nxfs_path, M_TEMP); 2746 FREE(nxfs, M_TEMP); 2747 } 2748 if (nfsrv_export_hashtbl) { 2749 /* all exports deleted, clean up export hash table */ 2750 FREE(nfsrv_export_hashtbl, M_TEMP); 2751 nfsrv_export_hashtbl = NULL; 2752 } 2753 lck_rw_done(&nfsrv_export_rwlock); 2754 return (0); 2755 } 2756 2757 error = copyinstr(unxa->nxa_fspath, path, MAXPATHLEN, &pathlen); 2758 if (error) 2759 return (error); 2760 2761 lck_rw_lock_exclusive(&nfsrv_export_rwlock); 2762 2763 /* init export hash table if not already */ 2764 if (!nfsrv_export_hashtbl) { 2765 if (nfsrv_export_hash_size <= 0) 2766 nfsrv_export_hash_size = NFSRVEXPHASHSZ; 2767 nfsrv_export_hashtbl = hashinit(nfsrv_export_hash_size, M_TEMP, &nfsrv_export_hash); 2768 } 2769 2770 // first check if we've already got an exportfs with the given ID 2771 LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) { 2772 if (nxfs->nxfs_id == unxa->nxa_fsid) 2773 break; 2774 } 2775 if (nxfs) { 2776 /* verify exported FS path matches given path */ 2777 if (strncmp(path, nxfs->nxfs_path, MAXPATHLEN)) { 2778 error = EEXIST; 2779 goto unlock_out; 2780 } 2781 if ((unxa->nxa_flags & (NXA_ADD|NXA_OFFLINE)) == NXA_ADD) { 2782 /* if adding, verify that the mount is still what we expect */ 2783 mp = vfs_getvfs_by_mntonname(nxfs->nxfs_path); 2784 if (mp) { 2785 mount_ref(mp, 0); 2786 mount_iterdrop(mp); 2787 } 2788 /* find exported FS root vnode */ 2789 NDINIT(&mnd, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, 2790 UIO_SYSSPACE, CAST_USER_ADDR_T(nxfs->nxfs_path), ctx); 2791 error = namei(&mnd); 2792 if (error) 2793 goto unlock_out; 2794 mvp = mnd.ni_vp; 2795 /* make sure it's (still) the root of a file system */ 2796 if (!vnode_isvroot(mvp)) { 2797 error = EINVAL; 2798 goto out; 2799 } 2800 /* sanity check: this should be same mount */ 2801 if (mp != vnode_mount(mvp)) { 2802 error = EINVAL; 2803 goto out; 2804 } 2805 } 2806 } else { 2807 /* no current exported file system with that ID */ 2808 if (!(unxa->nxa_flags & NXA_ADD)) { 2809 error = ENOENT; 2810 goto unlock_out; 2811 } 2812 2813 /* find exported FS root vnode */ 2814 NDINIT(&mnd, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, 2815 UIO_SYSSPACE, CAST_USER_ADDR_T(path), ctx); 2816 error = namei(&mnd); 2817 if (error) { 2818 if (!(unxa->nxa_flags & NXA_OFFLINE)) 2819 goto unlock_out; 2820 } else { 2821 mvp = mnd.ni_vp; 2822 /* make sure it's the root of a file system */ 2823 if (!vnode_isvroot(mvp)) { 2824 /* bail if not marked offline */ 2825 if (!(unxa->nxa_flags & NXA_OFFLINE)) { 2826 error = EINVAL; 2827 goto out; 2828 } 2829 vnode_put(mvp); 2830 nameidone(&mnd); 2831 mvp = NULL; 2832 } else { 2833 mp = vnode_mount(mvp); 2834 mount_ref(mp, 0); 2835 2836 /* make sure the file system is NFS-exportable */ 2837 nfh.nfh_len = NFSV3_MAX_FID_SIZE; 2838 error = VFS_VPTOFH(mvp, (int*)&nfh.nfh_len, &nfh.nfh_fid[0], NULL); 2839 if (!error && (nfh.nfh_len > (int)NFSV3_MAX_FID_SIZE)) 2840 error = EIO; 2841 if (!error && !(mp->mnt_vtable->vfc_vfsflags & VFC_VFSREADDIR_EXTENDED)) 2842 error = EISDIR; 2843 if (error) 2844 goto out; 2845 } 2846 } 2847 2848 /* add an exportfs for it */ 2849 MALLOC(nxfs, struct nfs_exportfs *, sizeof(struct nfs_exportfs), M_TEMP, M_WAITOK); 2850 if (!nxfs) { 2851 error = ENOMEM; 2852 goto out; 2853 } 2854 bzero(nxfs, sizeof(struct nfs_exportfs)); 2855 nxfs->nxfs_id = unxa->nxa_fsid; 2856 MALLOC(nxfs->nxfs_path, char*, pathlen, M_TEMP, M_WAITOK); 2857 if (!nxfs->nxfs_path) { 2858 FREE(nxfs, M_TEMP); 2859 error = ENOMEM; 2860 goto out; 2861 } 2862 bcopy(path, nxfs->nxfs_path, pathlen); 2863 /* insert into list in reverse-sorted order */ 2864 nxfs3 = NULL; 2865 LIST_FOREACH(nxfs2, &nfsrv_exports, nxfs_next) { 2866 if (strncmp(nxfs->nxfs_path, nxfs2->nxfs_path, MAXPATHLEN) > 0) 2867 break; 2868 nxfs3 = nxfs2; 2869 } 2870 if (nxfs2) 2871 LIST_INSERT_BEFORE(nxfs2, nxfs, nxfs_next); 2872 else if (nxfs3) 2873 LIST_INSERT_AFTER(nxfs3, nxfs, nxfs_next); 2874 else 2875 LIST_INSERT_HEAD(&nfsrv_exports, nxfs, nxfs_next); 2876 2877 /* make sure any quotas are enabled before we export the file system */ 2878 if (mp) 2879 enablequotas(mp, ctx); 2880 } 2881 2882 if (unxa->nxa_exppath) { 2883 error = copyinstr(unxa->nxa_exppath, path, MAXPATHLEN, &pathlen); 2884 if (error) 2885 goto out; 2886 LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) { 2887 if (nx->nx_id == unxa->nxa_expid) 2888 break; 2889 } 2890 if (nx) { 2891 /* verify exported FS path matches given path */ 2892 if (strncmp(path, nx->nx_path, MAXPATHLEN)) { 2893 error = EEXIST; 2894 goto out; 2895 } 2896 } else { 2897 /* no current export with that ID */ 2898 if (!(unxa->nxa_flags & NXA_ADD)) { 2899 error = ENOENT; 2900 goto out; 2901 } 2902 /* add an export for it */ 2903 MALLOC(nx, struct nfs_export *, sizeof(struct nfs_export), M_TEMP, M_WAITOK); 2904 if (!nx) { 2905 error = ENOMEM; 2906 goto out1; 2907 } 2908 bzero(nx, sizeof(struct nfs_export)); 2909 nx->nx_id = unxa->nxa_expid; 2910 nx->nx_fs = nxfs; 2911 microtime(&nx->nx_exptime); 2912 MALLOC(nx->nx_path, char*, pathlen, M_TEMP, M_WAITOK); 2913 if (!nx->nx_path) { 2914 error = ENOMEM; 2915 FREE(nx, M_TEMP); 2916 nx = NULL; 2917 goto out1; 2918 } 2919 bcopy(path, nx->nx_path, pathlen); 2920 /* initialize the active user list */ 2921 nfsrv_init_user_list(&nx->nx_user_list); 2922 /* insert into list in reverse-sorted order */ 2923 nx3 = NULL; 2924 LIST_FOREACH(nx2, &nxfs->nxfs_exports, nx_next) { 2925 if (strncmp(nx->nx_path, nx2->nx_path, MAXPATHLEN) > 0) 2926 break; 2927 nx3 = nx2; 2928 } 2929 if (nx2) 2930 LIST_INSERT_BEFORE(nx2, nx, nx_next); 2931 else if (nx3) 2932 LIST_INSERT_AFTER(nx3, nx, nx_next); 2933 else 2934 LIST_INSERT_HEAD(&nxfs->nxfs_exports, nx, nx_next); 2935 /* insert into hash */ 2936 LIST_INSERT_HEAD(NFSRVEXPHASH(nxfs->nxfs_id, nx->nx_id), nx, nx_hash); 2937 2938 /* 2939 * We don't allow/support nested exports. Check if the new entry 2940 * nests with the entries before and after or if there's an 2941 * entry for the file system root and subdirs. 2942 */ 2943 error = 0; 2944 if ((nx3 && !strncmp(nx3->nx_path, nx->nx_path, pathlen - 1) && 2945 (nx3->nx_path[pathlen-1] == '/')) || 2946 (nx2 && !strncmp(nx2->nx_path, nx->nx_path, strlen(nx2->nx_path)) && 2947 (nx->nx_path[strlen(nx2->nx_path)] == '/'))) 2948 error = EINVAL; 2949 if (!error) { 2950 /* check export conflict with fs root export and vice versa */ 2951 expisroot = !nx->nx_path[0] || 2952 ((nx->nx_path[0] == '.') && !nx->nx_path[1]); 2953 LIST_FOREACH(nx2, &nxfs->nxfs_exports, nx_next) { 2954 if (expisroot) { 2955 if (nx2 != nx) 2956 break; 2957 } else if (!nx2->nx_path[0]) 2958 break; 2959 else if ((nx2->nx_path[0] == '.') && !nx2->nx_path[1]) 2960 break; 2961 } 2962 if (nx2) 2963 error = EINVAL; 2964 } 2965 if (error) { 2966 /* 2967 * Don't actually return an error because mountd is 2968 * probably about to delete the conflicting export. 2969 * This can happen when a new export momentarily conflicts 2970 * with an old export while the transition is being made. 2971 * Theoretically, mountd could be written to avoid this 2972 * transient situation - but it would greatly increase the 2973 * complexity of mountd for very little overall benefit. 2974 */ 2975 printf("nfsrv_export: warning: nested exports: %s/%s\n", 2976 nxfs->nxfs_path, nx->nx_path); 2977 error = 0; 2978 } 2979 nx->nx_fh.nfh_xh.nxh_flags = NXHF_INVALIDFH; 2980 } 2981 /* make sure file handle is set up */ 2982 if ((nx->nx_fh.nfh_xh.nxh_version != htonl(NFS_FH_VERSION)) || 2983 (nx->nx_fh.nfh_xh.nxh_flags & NXHF_INVALIDFH)) { 2984 /* try to set up export root file handle */ 2985 nx->nx_fh.nfh_xh.nxh_version = htonl(NFS_FH_VERSION); 2986 nx->nx_fh.nfh_xh.nxh_fsid = htonl(nx->nx_fs->nxfs_id); 2987 nx->nx_fh.nfh_xh.nxh_expid = htonl(nx->nx_id); 2988 nx->nx_fh.nfh_xh.nxh_flags = 0; 2989 nx->nx_fh.nfh_xh.nxh_reserved = 0; 2990 nx->nx_fh.nfh_fhp = (u_char*)&nx->nx_fh.nfh_xh; 2991 bzero(&nx->nx_fh.nfh_fid[0], NFSV2_MAX_FID_SIZE); 2992 if (mvp) { 2993 /* find export root vnode */ 2994 if (!nx->nx_path[0] || ((nx->nx_path[0] == '.') && !nx->nx_path[1])) { 2995 /* exporting file system's root directory */ 2996 xvp = mvp; 2997 vnode_get(xvp); 2998 } else { 2999 xnd.ni_cnd.cn_nameiop = LOOKUP; 3000#if CONFIG_TRIGGERS 3001 xnd.ni_op = OP_LOOKUP; 3002#endif 3003 xnd.ni_cnd.cn_flags = LOCKLEAF; 3004 xnd.ni_pathlen = pathlen - 1; 3005 xnd.ni_cnd.cn_nameptr = xnd.ni_cnd.cn_pnbuf = path; 3006 xnd.ni_startdir = mvp; 3007 xnd.ni_usedvp = mvp; 3008 xnd.ni_cnd.cn_context = ctx; 3009 while ((error = lookup(&xnd)) == ERECYCLE) { 3010 xnd.ni_cnd.cn_flags = LOCKLEAF; 3011 xnd.ni_cnd.cn_nameptr = xnd.ni_cnd.cn_pnbuf; 3012 xnd.ni_usedvp = xnd.ni_dvp = xnd.ni_startdir = mvp; 3013 } 3014 if (error) 3015 goto out1; 3016 xvp = xnd.ni_vp; 3017 } 3018 3019 if (vnode_vtype(xvp) != VDIR) { 3020 error = EINVAL; 3021 vnode_put(xvp); 3022 goto out1; 3023 } 3024 3025 /* grab file handle */ 3026 nx->nx_fh.nfh_len = NFSV3_MAX_FID_SIZE; 3027 error = VFS_VPTOFH(xvp, (int*)&nx->nx_fh.nfh_len, &nx->nx_fh.nfh_fid[0], NULL); 3028 if (!error && (nx->nx_fh.nfh_len > (int)NFSV3_MAX_FID_SIZE)) { 3029 error = EIO; 3030 } else { 3031 nx->nx_fh.nfh_xh.nxh_fidlen = nx->nx_fh.nfh_len; 3032 nx->nx_fh.nfh_len += sizeof(nx->nx_fh.nfh_xh); 3033 } 3034 3035 vnode_put(xvp); 3036 if (error) 3037 goto out1; 3038 } else { 3039 nx->nx_fh.nfh_xh.nxh_flags = NXHF_INVALIDFH; 3040 nx->nx_fh.nfh_xh.nxh_fidlen = 0; 3041 nx->nx_fh.nfh_len = sizeof(nx->nx_fh.nfh_xh); 3042 } 3043 } 3044 } else { 3045 nx = NULL; 3046 } 3047 3048 /* perform the export changes */ 3049 if (unxa->nxa_flags & NXA_DELETE) { 3050 if (!nx) { 3051 /* delete all exports on this file system */ 3052 while ((nx = LIST_FIRST(&nxfs->nxfs_exports))) { 3053 LIST_REMOVE(nx, nx_next); 3054 LIST_REMOVE(nx, nx_hash); 3055 /* delete all netopts for this export */ 3056 nfsrv_free_addrlist(nx, NULL); 3057 nx->nx_flags &= ~NX_DEFAULTEXPORT; 3058 if (IS_VALID_CRED(nx->nx_defopt.nxo_cred)) { 3059 kauth_cred_unref(&nx->nx_defopt.nxo_cred); 3060 } 3061 /* delete active user list for this export */ 3062 nfsrv_free_user_list(&nx->nx_user_list); 3063 FREE(nx->nx_path, M_TEMP); 3064 FREE(nx, M_TEMP); 3065 } 3066 goto out1; 3067 } else if (!unxa->nxa_netcount) { 3068 /* delete all netopts for this export */ 3069 nfsrv_free_addrlist(nx, NULL); 3070 nx->nx_flags &= ~NX_DEFAULTEXPORT; 3071 if (IS_VALID_CRED(nx->nx_defopt.nxo_cred)) { 3072 kauth_cred_unref(&nx->nx_defopt.nxo_cred); 3073 } 3074 } else { 3075 /* delete only the netopts for the given addresses */ 3076 error = nfsrv_free_addrlist(nx, unxa); 3077 if (error) 3078 goto out1; 3079 } 3080 } 3081 if (unxa->nxa_flags & NXA_ADD) { 3082 /* 3083 * If going offline set the export time so that when 3084 * coming back on line we will present a new write verifier 3085 * to the client. 3086 */ 3087 if (unxa->nxa_flags & NXA_OFFLINE) 3088 microtime(&nx->nx_exptime); 3089 3090 error = nfsrv_hang_addrlist(nx, unxa); 3091 if (!error && mp) 3092 vfs_setflags(mp, MNT_EXPORTED); 3093 } 3094 3095out1: 3096 if (nx && !nx->nx_expcnt) { 3097 /* export has no export options */ 3098 LIST_REMOVE(nx, nx_next); 3099 LIST_REMOVE(nx, nx_hash); 3100 /* delete active user list for this export */ 3101 nfsrv_free_user_list(&nx->nx_user_list); 3102 FREE(nx->nx_path, M_TEMP); 3103 FREE(nx, M_TEMP); 3104 } 3105 if (LIST_EMPTY(&nxfs->nxfs_exports)) { 3106 /* exported file system has no more exports */ 3107 LIST_REMOVE(nxfs, nxfs_next); 3108 FREE(nxfs->nxfs_path, M_TEMP); 3109 FREE(nxfs, M_TEMP); 3110 if (mp) 3111 vfs_clearflags(mp, MNT_EXPORTED); 3112 } 3113 3114out: 3115 if (mvp) { 3116 vnode_put(mvp); 3117 nameidone(&mnd); 3118 } 3119unlock_out: 3120 if (mp) 3121 mount_drop(mp, 0); 3122 lck_rw_done(&nfsrv_export_rwlock); 3123 return (error); 3124} 3125 3126struct nfs_export_options * 3127nfsrv_export_lookup(struct nfs_export *nx, mbuf_t nam) 3128{ 3129 struct nfs_export_options *nxo = NULL; 3130 struct nfs_netopt *no = NULL; 3131 struct radix_node_head *rnh; 3132 struct sockaddr *saddr; 3133 3134 /* Lookup in the export list first. */ 3135 if (nam != NULL) { 3136 saddr = mbuf_data(nam); 3137 rnh = nx->nx_rtable[saddr->sa_family]; 3138 if (rnh != NULL) { 3139 no = (struct nfs_netopt *) 3140 (*rnh->rnh_matchaddr)((caddr_t)saddr, rnh); 3141 if (no && no->no_rnodes->rn_flags & RNF_ROOT) 3142 no = NULL; 3143 if (no) 3144 nxo = &no->no_opt; 3145 } 3146 } 3147 /* If no address match, use the default if it exists. */ 3148 if ((nxo == NULL) && (nx->nx_flags & NX_DEFAULTEXPORT)) 3149 nxo = &nx->nx_defopt; 3150 return (nxo); 3151} 3152 3153/* find an export for the given handle */ 3154struct nfs_export * 3155nfsrv_fhtoexport(struct nfs_filehandle *nfhp) 3156{ 3157 struct nfs_exphandle *nxh = (struct nfs_exphandle*)nfhp->nfh_fhp; 3158 struct nfs_export *nx; 3159 uint32_t fsid, expid; 3160 3161 if (!nfsrv_export_hashtbl) 3162 return (NULL); 3163 fsid = ntohl(nxh->nxh_fsid); 3164 expid = ntohl(nxh->nxh_expid); 3165 nx = NFSRVEXPHASH(fsid, expid)->lh_first; 3166 for (; nx; nx = LIST_NEXT(nx, nx_hash)) { 3167 if (nx->nx_fs->nxfs_id != fsid) 3168 continue; 3169 if (nx->nx_id != expid) 3170 continue; 3171 break; 3172 } 3173 return (nx); 3174} 3175 3176/* 3177 * nfsrv_fhtovp() - convert FH to vnode and export info 3178 */ 3179int 3180nfsrv_fhtovp( 3181 struct nfs_filehandle *nfhp, 3182 struct nfsrv_descript *nd, 3183 vnode_t *vpp, 3184 struct nfs_export **nxp, 3185 struct nfs_export_options **nxop) 3186{ 3187 struct nfs_exphandle *nxh = (struct nfs_exphandle*)nfhp->nfh_fhp; 3188 struct nfs_export_options *nxo; 3189 u_char *fidp; 3190 int error; 3191 struct mount *mp; 3192 mbuf_t nam = NULL; 3193 uint32_t v; 3194 int i, valid; 3195 3196 *vpp = NULL; 3197 *nxp = NULL; 3198 *nxop = NULL; 3199 3200 if (nd != NULL) 3201 nam = nd->nd_nam; 3202 3203 v = ntohl(nxh->nxh_version); 3204 if (v != NFS_FH_VERSION) { 3205 /* file handle format not supported */ 3206 return (ESTALE); 3207 } 3208 if (nfhp->nfh_len > NFSV3_MAX_FH_SIZE) 3209 return (EBADRPC); 3210 if (nfhp->nfh_len < (int)sizeof(struct nfs_exphandle)) 3211 return (ESTALE); 3212 v = ntohs(nxh->nxh_flags); 3213 if (v & NXHF_INVALIDFH) 3214 return (ESTALE); 3215 3216 *nxp = nfsrv_fhtoexport(nfhp); 3217 if (!*nxp) 3218 return (ESTALE); 3219 3220 /* Get the export option structure for this <export, client> tuple. */ 3221 *nxop = nxo = nfsrv_export_lookup(*nxp, nam); 3222 if (nam && (*nxop == NULL)) 3223 return (EACCES); 3224 3225 if (nd != NULL) { 3226 /* Validate the security flavor of the request */ 3227 for (i = 0, valid = 0; i < nxo->nxo_sec.count; i++) { 3228 if (nd->nd_sec == nxo->nxo_sec.flavors[i]) { 3229 valid = 1; 3230 break; 3231 } 3232 } 3233 if (!valid) { 3234 /* 3235 * RFC 2623 section 2.3.2 recommends no authentication 3236 * requirement for certain NFS procedures used for mounting. 3237 * This allows an unauthenticated superuser on the client 3238 * to do mounts for the benefit of authenticated users. 3239 */ 3240 if (nd->nd_vers == NFS_VER2) 3241 if (nd->nd_procnum == NFSV2PROC_GETATTR || 3242 nd->nd_procnum == NFSV2PROC_STATFS) 3243 valid = 1; 3244 if (nd->nd_vers == NFS_VER3) 3245 if (nd->nd_procnum == NFSPROC_FSINFO) 3246 valid = 1; 3247 3248 if (!valid) 3249 return (NFSERR_AUTHERR | AUTH_REJECTCRED); 3250 } 3251 } 3252 3253 if (nxo && (nxo->nxo_flags & NX_OFFLINE)) 3254 return ((nd == NULL || nd->nd_vers == NFS_VER2) ? ESTALE : NFSERR_TRYLATER); 3255 3256 /* find mount structure */ 3257 mp = vfs_getvfs_by_mntonname((*nxp)->nx_fs->nxfs_path); 3258 if (mp) { 3259 error = vfs_busy(mp, LK_NOWAIT); 3260 mount_iterdrop(mp); 3261 if (error) 3262 mp = NULL; 3263 } 3264 if (!mp) { 3265 /* 3266 * We have an export, but no mount? 3267 * Perhaps the export just hasn't been marked offline yet. 3268 */ 3269 return ((nd == NULL || nd->nd_vers == NFS_VER2) ? ESTALE : NFSERR_TRYLATER); 3270 } 3271 3272 fidp = nfhp->nfh_fhp + sizeof(*nxh); 3273 error = VFS_FHTOVP(mp, nxh->nxh_fidlen, fidp, vpp, NULL); 3274 vfs_unbusy(mp); 3275 if (error) 3276 return (error); 3277 /* vnode pointer should be good at this point or ... */ 3278 if (*vpp == NULL) 3279 return (ESTALE); 3280 return (0); 3281} 3282 3283/* 3284 * nfsrv_credcheck() - check/map credentials according 3285 * to given export options. 3286 */ 3287int 3288nfsrv_credcheck( 3289 struct nfsrv_descript *nd, 3290 vfs_context_t ctx, 3291 __unused struct nfs_export *nx, 3292 struct nfs_export_options *nxo) 3293{ 3294 if (nxo && nxo->nxo_cred) { 3295 if ((nxo->nxo_flags & NX_MAPALL) || 3296 ((nxo->nxo_flags & NX_MAPROOT) && !suser(nd->nd_cr, NULL))) { 3297 kauth_cred_ref(nxo->nxo_cred); 3298 kauth_cred_unref(&nd->nd_cr); 3299 nd->nd_cr = nxo->nxo_cred; 3300 } 3301 } 3302 ctx->vc_ucred = nd->nd_cr; 3303 return (0); 3304} 3305 3306/* 3307 * nfsrv_vptofh() - convert vnode to file handle for given export 3308 * 3309 * If the caller is passing in a vnode for a ".." directory entry, 3310 * they can pass a directory NFS file handle (dnfhp) which will be 3311 * checked against the root export file handle. If it matches, we 3312 * refuse to provide the file handle for the out-of-export directory. 3313 */ 3314int 3315nfsrv_vptofh( 3316 struct nfs_export *nx, 3317 int nfsvers, 3318 struct nfs_filehandle *dnfhp, 3319 vnode_t vp, 3320 vfs_context_t ctx, 3321 struct nfs_filehandle *nfhp) 3322{ 3323 int error; 3324 uint32_t maxfidsize; 3325 3326 nfhp->nfh_fhp = (u_char*)&nfhp->nfh_xh; 3327 nfhp->nfh_xh.nxh_version = htonl(NFS_FH_VERSION); 3328 nfhp->nfh_xh.nxh_fsid = htonl(nx->nx_fs->nxfs_id); 3329 nfhp->nfh_xh.nxh_expid = htonl(nx->nx_id); 3330 nfhp->nfh_xh.nxh_flags = 0; 3331 nfhp->nfh_xh.nxh_reserved = 0; 3332 3333 if (nfsvers == NFS_VER2) 3334 bzero(&nfhp->nfh_fid[0], NFSV2_MAX_FID_SIZE); 3335 3336 /* if directory FH matches export root, return invalid FH */ 3337 if (dnfhp && nfsrv_fhmatch(dnfhp, &nx->nx_fh)) { 3338 if (nfsvers == NFS_VER2) 3339 nfhp->nfh_len = NFSX_V2FH; 3340 else 3341 nfhp->nfh_len = sizeof(nfhp->nfh_xh); 3342 nfhp->nfh_xh.nxh_fidlen = 0; 3343 nfhp->nfh_xh.nxh_flags = htons(NXHF_INVALIDFH); 3344 return (0); 3345 } 3346 3347 if (nfsvers == NFS_VER2) 3348 maxfidsize = NFSV2_MAX_FID_SIZE; 3349 else 3350 maxfidsize = NFSV3_MAX_FID_SIZE; 3351 nfhp->nfh_len = maxfidsize; 3352 3353 error = VFS_VPTOFH(vp, (int*)&nfhp->nfh_len, &nfhp->nfh_fid[0], ctx); 3354 if (error) 3355 return (error); 3356 if (nfhp->nfh_len > maxfidsize) 3357 return (EOVERFLOW); 3358 nfhp->nfh_xh.nxh_fidlen = nfhp->nfh_len; 3359 nfhp->nfh_len += sizeof(nfhp->nfh_xh); 3360 if ((nfsvers == NFS_VER2) && (nfhp->nfh_len < NFSX_V2FH)) 3361 nfhp->nfh_len = NFSX_V2FH; 3362 3363 return (0); 3364} 3365 3366/* 3367 * Compare two file handles to see it they're the same. 3368 * Note that we don't use nfh_len because that may include 3369 * padding in an NFSv2 file handle. 3370 */ 3371int 3372nfsrv_fhmatch(struct nfs_filehandle *fh1, struct nfs_filehandle *fh2) 3373{ 3374 struct nfs_exphandle *nxh1, *nxh2; 3375 int len1, len2; 3376 3377 nxh1 = (struct nfs_exphandle *)fh1->nfh_fhp; 3378 nxh2 = (struct nfs_exphandle *)fh2->nfh_fhp; 3379 len1 = sizeof(fh1->nfh_xh) + nxh1->nxh_fidlen; 3380 len2 = sizeof(fh2->nfh_xh) + nxh2->nxh_fidlen; 3381 if (len1 != len2) 3382 return (0); 3383 if (bcmp(nxh1, nxh2, len1)) 3384 return (0); 3385 return (1); 3386} 3387 3388/* 3389 * Functions for dealing with active user lists 3390 */ 3391 3392/* 3393 * Search the hash table for a user node with a matching IP address and uid field. 3394 * If found, the node's tm_last timestamp is updated and the node is returned. 3395 * 3396 * If not found, a new node is allocated (or reclaimed via LRU), initialized, and returned. 3397 * Returns NULL if a new node could not be allcoated. 3398 * 3399 * The list's user_mutex lock MUST be held. 3400 */ 3401struct nfs_user_stat_node * 3402nfsrv_get_user_stat_node(struct nfs_active_user_list *list, struct sockaddr *saddr, uid_t uid) 3403{ 3404 struct nfs_user_stat_node *unode; 3405 struct timeval now; 3406 struct nfs_user_stat_hashtbl_head *head; 3407 3408 /* seach the hash table */ 3409 head = NFS_USER_STAT_HASH(list->user_hashtbl, uid); 3410 LIST_FOREACH(unode, head, hash_link) { 3411 if ((uid == unode->uid) && (nfs_sockaddr_cmp(saddr, (struct sockaddr*)&unode->sock) == 0)) { 3412 /* found matching node */ 3413 break; 3414 } 3415 } 3416 3417 if (unode) { 3418 /* found node in the hash table, now update lru position */ 3419 TAILQ_REMOVE(&list->user_lru, unode, lru_link); 3420 TAILQ_INSERT_TAIL(&list->user_lru, unode, lru_link); 3421 3422 /* update time stamp */ 3423 microtime(&now); 3424 unode->tm_last = (uint32_t)now.tv_sec; 3425 return unode; 3426 } 3427 3428 if (list->node_count < nfsrv_user_stat_max_nodes) { 3429 /* Allocate a new node */ 3430 MALLOC(unode, struct nfs_user_stat_node *, sizeof(struct nfs_user_stat_node), 3431 M_TEMP, M_WAITOK | M_ZERO); 3432 3433 if (!unode) 3434 return NULL; 3435 3436 /* increment node count */ 3437 OSAddAtomic(1, &nfsrv_user_stat_node_count); 3438 list->node_count++; 3439 } else { 3440 /* reuse the oldest node in the lru list */ 3441 unode = TAILQ_FIRST(&list->user_lru); 3442 3443 if (!unode) 3444 return NULL; 3445 3446 /* Remove the node */ 3447 TAILQ_REMOVE(&list->user_lru, unode, lru_link); 3448 LIST_REMOVE(unode, hash_link); 3449 } 3450 3451 /* Initialize the node */ 3452 unode->uid = uid; 3453 bcopy(saddr, &unode->sock, saddr->sa_len); 3454 microtime(&now); 3455 unode->ops = 0; 3456 unode->bytes_read = 0; 3457 unode->bytes_written = 0; 3458 unode->tm_start = (uint32_t)now.tv_sec; 3459 unode->tm_last = (uint32_t)now.tv_sec; 3460 3461 /* insert the node */ 3462 TAILQ_INSERT_TAIL(&list->user_lru, unode, lru_link); 3463 LIST_INSERT_HEAD(head, unode, hash_link); 3464 3465 return unode; 3466} 3467 3468void 3469nfsrv_update_user_stat(struct nfs_export *nx, struct nfsrv_descript *nd, uid_t uid, u_int ops, u_int rd_bytes, u_int wr_bytes) 3470{ 3471 struct nfs_user_stat_node *unode; 3472 struct nfs_active_user_list *ulist; 3473 struct sockaddr *saddr; 3474 3475 if ((!nfsrv_user_stat_enabled) || (!nx) || (!nd) || (!nd->nd_nam)) 3476 return; 3477 3478 saddr = (struct sockaddr *)mbuf_data(nd->nd_nam); 3479 3480 /* check address family before going any further */ 3481 if ((saddr->sa_family != AF_INET) && (saddr->sa_family != AF_INET6)) 3482 return; 3483 3484 ulist = &nx->nx_user_list; 3485 3486 /* lock the active user list */ 3487 lck_mtx_lock(&ulist->user_mutex); 3488 3489 /* get the user node */ 3490 unode = nfsrv_get_user_stat_node(ulist, saddr, uid); 3491 3492 if (!unode) { 3493 lck_mtx_unlock(&ulist->user_mutex); 3494 return; 3495 } 3496 3497 /* update counters */ 3498 unode->ops += ops; 3499 unode->bytes_read += rd_bytes; 3500 unode->bytes_written += wr_bytes; 3501 3502 /* done */ 3503 lck_mtx_unlock(&ulist->user_mutex); 3504} 3505 3506/* initialize an active user list */ 3507void 3508nfsrv_init_user_list(struct nfs_active_user_list *ulist) 3509{ 3510 uint i; 3511 3512 /* initialize the lru */ 3513 TAILQ_INIT(&ulist->user_lru); 3514 3515 /* initialize the hash table */ 3516 for(i = 0; i < NFS_USER_STAT_HASH_SIZE; i++) 3517 LIST_INIT(&ulist->user_hashtbl[i]); 3518 ulist->node_count = 0; 3519 3520 lck_mtx_init(&ulist->user_mutex, nfsrv_active_user_mutex_group, LCK_ATTR_NULL); 3521} 3522 3523/* Free all nodes in an active user list */ 3524void 3525nfsrv_free_user_list(struct nfs_active_user_list *ulist) 3526{ 3527 struct nfs_user_stat_node *unode; 3528 3529 if (!ulist) 3530 return; 3531 3532 while ((unode = TAILQ_FIRST(&ulist->user_lru))) { 3533 /* Remove node and free */ 3534 TAILQ_REMOVE(&ulist->user_lru, unode, lru_link); 3535 LIST_REMOVE(unode, hash_link); 3536 FREE(unode, M_TEMP); 3537 3538 /* decrement node count */ 3539 OSAddAtomic(-1, &nfsrv_user_stat_node_count); 3540 } 3541 ulist->node_count = 0; 3542 3543 lck_mtx_destroy(&ulist->user_mutex, nfsrv_active_user_mutex_group); 3544} 3545 3546/* Reclaim old expired user nodes from active user lists. */ 3547void 3548nfsrv_active_user_list_reclaim(void) 3549{ 3550 struct nfs_exportfs *nxfs; 3551 struct nfs_export *nx; 3552 struct nfs_active_user_list *ulist; 3553 struct nfs_user_stat_hashtbl_head oldlist; 3554 struct nfs_user_stat_node *unode, *unode_next; 3555 struct timeval now; 3556 uint32_t tstale; 3557 3558 LIST_INIT(&oldlist); 3559 3560 lck_rw_lock_shared(&nfsrv_export_rwlock); 3561 microtime(&now); 3562 tstale = now.tv_sec - nfsrv_user_stat_max_idle_sec; 3563 LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) { 3564 LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) { 3565 /* Scan through all user nodes of this export */ 3566 ulist = &nx->nx_user_list; 3567 lck_mtx_lock(&ulist->user_mutex); 3568 for (unode = TAILQ_FIRST(&ulist->user_lru); unode; unode = unode_next) { 3569 unode_next = TAILQ_NEXT(unode, lru_link); 3570 3571 /* check if this node has expired */ 3572 if (unode->tm_last >= tstale) 3573 break; 3574 3575 /* Remove node from the active user list */ 3576 TAILQ_REMOVE(&ulist->user_lru, unode, lru_link); 3577 LIST_REMOVE(unode, hash_link); 3578 3579 /* Add node to temp list */ 3580 LIST_INSERT_HEAD(&oldlist, unode, hash_link); 3581 3582 /* decrement node count */ 3583 OSAddAtomic(-1, &nfsrv_user_stat_node_count); 3584 ulist->node_count--; 3585 } 3586 /* can unlock this export's list now */ 3587 lck_mtx_unlock(&ulist->user_mutex); 3588 } 3589 } 3590 lck_rw_done(&nfsrv_export_rwlock); 3591 3592 /* Free expired nodes */ 3593 while ((unode = LIST_FIRST(&oldlist))) { 3594 LIST_REMOVE(unode, hash_link); 3595 FREE(unode, M_TEMP); 3596 } 3597} 3598 3599/* 3600 * Maps errno values to nfs error numbers. 3601 * Use NFSERR_IO as the catch all for ones not specifically defined in 3602 * RFC 1094. 3603 */ 3604static u_char nfsrv_v2errmap[] = { 3605 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3606 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3607 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 3608 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 3609 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3610 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 3611 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3612 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3613 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3614 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3615 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3616 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 3617 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 3618 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 3619}; 3620 3621/* 3622 * Maps errno values to nfs error numbers. 3623 * Although it is not obvious whether or not NFS clients really care if 3624 * a returned error value is in the specified list for the procedure, the 3625 * safest thing to do is filter them appropriately. For Version 2, the 3626 * X/Open XNFS document is the only specification that defines error values 3627 * for each RPC (The RFC simply lists all possible error values for all RPCs), 3628 * so I have decided to not do this for Version 2. 3629 * The first entry is the default error return and the rest are the valid 3630 * errors for that RPC in increasing numeric order. 3631 */ 3632static short nfsv3err_null[] = { 3633 0, 3634 0, 3635}; 3636 3637static short nfsv3err_getattr[] = { 3638 NFSERR_IO, 3639 NFSERR_IO, 3640 NFSERR_STALE, 3641 NFSERR_BADHANDLE, 3642 NFSERR_SERVERFAULT, 3643 NFSERR_TRYLATER, 3644 0, 3645}; 3646 3647static short nfsv3err_setattr[] = { 3648 NFSERR_IO, 3649 NFSERR_PERM, 3650 NFSERR_IO, 3651 NFSERR_ACCES, 3652 NFSERR_INVAL, 3653 NFSERR_NOSPC, 3654 NFSERR_ROFS, 3655 NFSERR_DQUOT, 3656 NFSERR_STALE, 3657 NFSERR_BADHANDLE, 3658 NFSERR_NOT_SYNC, 3659 NFSERR_SERVERFAULT, 3660 NFSERR_TRYLATER, 3661 0, 3662}; 3663 3664static short nfsv3err_lookup[] = { 3665 NFSERR_IO, 3666 NFSERR_NOENT, 3667 NFSERR_IO, 3668 NFSERR_ACCES, 3669 NFSERR_NOTDIR, 3670 NFSERR_NAMETOL, 3671 NFSERR_STALE, 3672 NFSERR_BADHANDLE, 3673 NFSERR_SERVERFAULT, 3674 NFSERR_TRYLATER, 3675 0, 3676}; 3677 3678static short nfsv3err_access[] = { 3679 NFSERR_IO, 3680 NFSERR_IO, 3681 NFSERR_STALE, 3682 NFSERR_BADHANDLE, 3683 NFSERR_SERVERFAULT, 3684 NFSERR_TRYLATER, 3685 0, 3686}; 3687 3688static short nfsv3err_readlink[] = { 3689 NFSERR_IO, 3690 NFSERR_IO, 3691 NFSERR_ACCES, 3692 NFSERR_INVAL, 3693 NFSERR_STALE, 3694 NFSERR_BADHANDLE, 3695 NFSERR_NOTSUPP, 3696 NFSERR_SERVERFAULT, 3697 NFSERR_TRYLATER, 3698 0, 3699}; 3700 3701static short nfsv3err_read[] = { 3702 NFSERR_IO, 3703 NFSERR_IO, 3704 NFSERR_NXIO, 3705 NFSERR_ACCES, 3706 NFSERR_INVAL, 3707 NFSERR_STALE, 3708 NFSERR_BADHANDLE, 3709 NFSERR_SERVERFAULT, 3710 NFSERR_TRYLATER, 3711 0, 3712}; 3713 3714static short nfsv3err_write[] = { 3715 NFSERR_IO, 3716 NFSERR_IO, 3717 NFSERR_ACCES, 3718 NFSERR_INVAL, 3719 NFSERR_FBIG, 3720 NFSERR_NOSPC, 3721 NFSERR_ROFS, 3722 NFSERR_DQUOT, 3723 NFSERR_STALE, 3724 NFSERR_BADHANDLE, 3725 NFSERR_SERVERFAULT, 3726 NFSERR_TRYLATER, 3727 0, 3728}; 3729 3730static short nfsv3err_create[] = { 3731 NFSERR_IO, 3732 NFSERR_IO, 3733 NFSERR_ACCES, 3734 NFSERR_EXIST, 3735 NFSERR_NOTDIR, 3736 NFSERR_NOSPC, 3737 NFSERR_ROFS, 3738 NFSERR_NAMETOL, 3739 NFSERR_DQUOT, 3740 NFSERR_STALE, 3741 NFSERR_BADHANDLE, 3742 NFSERR_NOTSUPP, 3743 NFSERR_SERVERFAULT, 3744 NFSERR_TRYLATER, 3745 0, 3746}; 3747 3748static short nfsv3err_mkdir[] = { 3749 NFSERR_IO, 3750 NFSERR_IO, 3751 NFSERR_ACCES, 3752 NFSERR_EXIST, 3753 NFSERR_NOTDIR, 3754 NFSERR_NOSPC, 3755 NFSERR_ROFS, 3756 NFSERR_NAMETOL, 3757 NFSERR_DQUOT, 3758 NFSERR_STALE, 3759 NFSERR_BADHANDLE, 3760 NFSERR_NOTSUPP, 3761 NFSERR_SERVERFAULT, 3762 NFSERR_TRYLATER, 3763 0, 3764}; 3765 3766static short nfsv3err_symlink[] = { 3767 NFSERR_IO, 3768 NFSERR_IO, 3769 NFSERR_ACCES, 3770 NFSERR_EXIST, 3771 NFSERR_NOTDIR, 3772 NFSERR_NOSPC, 3773 NFSERR_ROFS, 3774 NFSERR_NAMETOL, 3775 NFSERR_DQUOT, 3776 NFSERR_STALE, 3777 NFSERR_BADHANDLE, 3778 NFSERR_NOTSUPP, 3779 NFSERR_SERVERFAULT, 3780 NFSERR_TRYLATER, 3781 0, 3782}; 3783 3784static short nfsv3err_mknod[] = { 3785 NFSERR_IO, 3786 NFSERR_IO, 3787 NFSERR_ACCES, 3788 NFSERR_EXIST, 3789 NFSERR_NOTDIR, 3790 NFSERR_NOSPC, 3791 NFSERR_ROFS, 3792 NFSERR_NAMETOL, 3793 NFSERR_DQUOT, 3794 NFSERR_STALE, 3795 NFSERR_BADHANDLE, 3796 NFSERR_NOTSUPP, 3797 NFSERR_SERVERFAULT, 3798 NFSERR_BADTYPE, 3799 NFSERR_TRYLATER, 3800 0, 3801}; 3802 3803static short nfsv3err_remove[] = { 3804 NFSERR_IO, 3805 NFSERR_NOENT, 3806 NFSERR_IO, 3807 NFSERR_ACCES, 3808 NFSERR_NOTDIR, 3809 NFSERR_ROFS, 3810 NFSERR_NAMETOL, 3811 NFSERR_STALE, 3812 NFSERR_BADHANDLE, 3813 NFSERR_SERVERFAULT, 3814 NFSERR_TRYLATER, 3815 0, 3816}; 3817 3818static short nfsv3err_rmdir[] = { 3819 NFSERR_IO, 3820 NFSERR_NOENT, 3821 NFSERR_IO, 3822 NFSERR_ACCES, 3823 NFSERR_EXIST, 3824 NFSERR_NOTDIR, 3825 NFSERR_INVAL, 3826 NFSERR_ROFS, 3827 NFSERR_NAMETOL, 3828 NFSERR_NOTEMPTY, 3829 NFSERR_STALE, 3830 NFSERR_BADHANDLE, 3831 NFSERR_NOTSUPP, 3832 NFSERR_SERVERFAULT, 3833 NFSERR_TRYLATER, 3834 0, 3835}; 3836 3837static short nfsv3err_rename[] = { 3838 NFSERR_IO, 3839 NFSERR_NOENT, 3840 NFSERR_IO, 3841 NFSERR_ACCES, 3842 NFSERR_EXIST, 3843 NFSERR_XDEV, 3844 NFSERR_NOTDIR, 3845 NFSERR_ISDIR, 3846 NFSERR_INVAL, 3847 NFSERR_NOSPC, 3848 NFSERR_ROFS, 3849 NFSERR_MLINK, 3850 NFSERR_NAMETOL, 3851 NFSERR_NOTEMPTY, 3852 NFSERR_DQUOT, 3853 NFSERR_STALE, 3854 NFSERR_BADHANDLE, 3855 NFSERR_NOTSUPP, 3856 NFSERR_SERVERFAULT, 3857 NFSERR_TRYLATER, 3858 0, 3859}; 3860 3861static short nfsv3err_link[] = { 3862 NFSERR_IO, 3863 NFSERR_IO, 3864 NFSERR_ACCES, 3865 NFSERR_EXIST, 3866 NFSERR_XDEV, 3867 NFSERR_NOTDIR, 3868 NFSERR_INVAL, 3869 NFSERR_NOSPC, 3870 NFSERR_ROFS, 3871 NFSERR_MLINK, 3872 NFSERR_NAMETOL, 3873 NFSERR_DQUOT, 3874 NFSERR_STALE, 3875 NFSERR_BADHANDLE, 3876 NFSERR_NOTSUPP, 3877 NFSERR_SERVERFAULT, 3878 NFSERR_TRYLATER, 3879 0, 3880}; 3881 3882static short nfsv3err_readdir[] = { 3883 NFSERR_IO, 3884 NFSERR_IO, 3885 NFSERR_ACCES, 3886 NFSERR_NOTDIR, 3887 NFSERR_STALE, 3888 NFSERR_BADHANDLE, 3889 NFSERR_BAD_COOKIE, 3890 NFSERR_TOOSMALL, 3891 NFSERR_SERVERFAULT, 3892 NFSERR_TRYLATER, 3893 0, 3894}; 3895 3896static short nfsv3err_readdirplus[] = { 3897 NFSERR_IO, 3898 NFSERR_IO, 3899 NFSERR_ACCES, 3900 NFSERR_NOTDIR, 3901 NFSERR_STALE, 3902 NFSERR_BADHANDLE, 3903 NFSERR_BAD_COOKIE, 3904 NFSERR_NOTSUPP, 3905 NFSERR_TOOSMALL, 3906 NFSERR_SERVERFAULT, 3907 NFSERR_TRYLATER, 3908 0, 3909}; 3910 3911static short nfsv3err_fsstat[] = { 3912 NFSERR_IO, 3913 NFSERR_IO, 3914 NFSERR_STALE, 3915 NFSERR_BADHANDLE, 3916 NFSERR_SERVERFAULT, 3917 NFSERR_TRYLATER, 3918 0, 3919}; 3920 3921static short nfsv3err_fsinfo[] = { 3922 NFSERR_STALE, 3923 NFSERR_STALE, 3924 NFSERR_BADHANDLE, 3925 NFSERR_SERVERFAULT, 3926 NFSERR_TRYLATER, 3927 0, 3928}; 3929 3930static short nfsv3err_pathconf[] = { 3931 NFSERR_STALE, 3932 NFSERR_STALE, 3933 NFSERR_BADHANDLE, 3934 NFSERR_SERVERFAULT, 3935 NFSERR_TRYLATER, 3936 0, 3937}; 3938 3939static short nfsv3err_commit[] = { 3940 NFSERR_IO, 3941 NFSERR_IO, 3942 NFSERR_STALE, 3943 NFSERR_BADHANDLE, 3944 NFSERR_SERVERFAULT, 3945 NFSERR_TRYLATER, 3946 0, 3947}; 3948 3949static short *nfsrv_v3errmap[] = { 3950 nfsv3err_null, 3951 nfsv3err_getattr, 3952 nfsv3err_setattr, 3953 nfsv3err_lookup, 3954 nfsv3err_access, 3955 nfsv3err_readlink, 3956 nfsv3err_read, 3957 nfsv3err_write, 3958 nfsv3err_create, 3959 nfsv3err_mkdir, 3960 nfsv3err_symlink, 3961 nfsv3err_mknod, 3962 nfsv3err_remove, 3963 nfsv3err_rmdir, 3964 nfsv3err_rename, 3965 nfsv3err_link, 3966 nfsv3err_readdir, 3967 nfsv3err_readdirplus, 3968 nfsv3err_fsstat, 3969 nfsv3err_fsinfo, 3970 nfsv3err_pathconf, 3971 nfsv3err_commit, 3972}; 3973 3974/* 3975 * Map errnos to NFS error numbers. For Version 3 also filter out error 3976 * numbers not specified for the associated procedure. 3977 */ 3978int 3979nfsrv_errmap(struct nfsrv_descript *nd, int err) 3980{ 3981 short *defaulterrp, *errp; 3982 3983 if (nd->nd_vers == NFS_VER2) { 3984 if (err <= (int)sizeof(nfsrv_v2errmap)) 3985 return ((int)nfsrv_v2errmap[err - 1]); 3986 return (NFSERR_IO); 3987 } 3988 /* NFSv3 */ 3989 if (nd->nd_procnum > NFSPROC_COMMIT) 3990 return (err & 0xffff); 3991 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 3992 while (*++errp) { 3993 if (*errp == err) 3994 return (err); 3995 else if (*errp > err) 3996 break; 3997 } 3998 return ((int)*defaulterrp); 3999} 4000 4001#endif /* NFSSERVER */ 4002 4003