nfs_subs.c revision 1.177
1 /* $NetBSD: nfs_subs.c,v 1.177 2006/11/09 09:53:57 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 35 */ 36 37 /* 38 * Copyright 2000 Wasabi Systems, Inc. 39 * All rights reserved. 40 * 41 * Written by Frank van der Linden for Wasabi Systems, Inc. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed for the NetBSD Project by 54 * Wasabi Systems, Inc. 55 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 56 * or promote products derived from this software without specific prior 57 * written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 61 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 62 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 63 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 64 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 65 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 66 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 67 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 68 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 69 * POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72 #include <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: nfs_subs.c,v 1.177 2006/11/09 09:53:57 yamt Exp $"); 74 75 #include "fs_nfs.h" 76 #include "opt_nfs.h" 77 #include "opt_nfsserver.h" 78 #include "opt_iso.h" 79 #include "opt_inet.h" 80 81 /* 82 * These functions support the macros and help fiddle mbuf chains for 83 * the nfs op functions. They do things like create the rpc header and 84 * copy data between mbuf chains and uio lists. 85 */ 86 #include <sys/param.h> 87 #include <sys/proc.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/mount.h> 91 #include <sys/vnode.h> 92 #include <sys/namei.h> 93 #include <sys/mbuf.h> 94 #include <sys/socket.h> 95 #include <sys/stat.h> 96 #include <sys/malloc.h> 97 #include <sys/filedesc.h> 98 #include <sys/time.h> 99 #include <sys/dirent.h> 100 #include <sys/once.h> 101 #include <sys/kauth.h> 102 103 #include <uvm/uvm_extern.h> 104 105 #include <nfs/rpcv2.h> 106 #include <nfs/nfsproto.h> 107 #include <nfs/nfsnode.h> 108 #include <nfs/nfs.h> 109 #include <nfs/xdr_subs.h> 110 #include <nfs/nfsm_subs.h> 111 #include <nfs/nfsmount.h> 112 #include <nfs/nqnfs.h> 113 #include <nfs/nfsrtt.h> 114 #include <nfs/nfs_var.h> 115 116 #include <miscfs/specfs/specdev.h> 117 118 #include <netinet/in.h> 119 #ifdef ISO 120 #include <netiso/iso.h> 121 #endif 122 123 /* 124 * Data items converted to xdr at startup, since they are constant 125 * This is kinda hokey, but may save a little time doing byte swaps 126 */ 127 u_int32_t nfs_xdrneg1; 128 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 129 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 130 rpc_auth_kerb; 131 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 132 133 /* And other global data */ 134 const nfstype nfsv2_type[9] = 135 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, NFCHR, NFNON }; 136 const nfstype nfsv3_type[9] = 137 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON }; 138 const enum vtype nv2tov_type[8] = 139 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 140 const enum vtype nv3tov_type[8] = 141 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 142 int nfs_ticks; 143 int nfs_commitsize; 144 145 MALLOC_DEFINE(M_NFSDIROFF, "NFS diroff", "NFS directory cookies"); 146 147 /* NFS client/server stats. */ 148 struct nfsstats nfsstats; 149 150 /* 151 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 152 */ 153 const int nfsv3_procid[NFS_NPROCS] = { 154 NFSPROC_NULL, 155 NFSPROC_GETATTR, 156 NFSPROC_SETATTR, 157 NFSPROC_NOOP, 158 NFSPROC_LOOKUP, 159 NFSPROC_READLINK, 160 NFSPROC_READ, 161 NFSPROC_NOOP, 162 NFSPROC_WRITE, 163 NFSPROC_CREATE, 164 NFSPROC_REMOVE, 165 NFSPROC_RENAME, 166 NFSPROC_LINK, 167 NFSPROC_SYMLINK, 168 NFSPROC_MKDIR, 169 NFSPROC_RMDIR, 170 NFSPROC_READDIR, 171 NFSPROC_FSSTAT, 172 NFSPROC_NOOP, 173 NFSPROC_NOOP, 174 NFSPROC_NOOP, 175 NFSPROC_NOOP, 176 NFSPROC_NOOP, 177 NFSPROC_NOOP, 178 NFSPROC_NOOP, 179 NFSPROC_NOOP 180 }; 181 182 /* 183 * and the reverse mapping from generic to Version 2 procedure numbers 184 */ 185 const int nfsv2_procid[NFS_NPROCS] = { 186 NFSV2PROC_NULL, 187 NFSV2PROC_GETATTR, 188 NFSV2PROC_SETATTR, 189 NFSV2PROC_LOOKUP, 190 NFSV2PROC_NOOP, 191 NFSV2PROC_READLINK, 192 NFSV2PROC_READ, 193 NFSV2PROC_WRITE, 194 NFSV2PROC_CREATE, 195 NFSV2PROC_MKDIR, 196 NFSV2PROC_SYMLINK, 197 NFSV2PROC_CREATE, 198 NFSV2PROC_REMOVE, 199 NFSV2PROC_RMDIR, 200 NFSV2PROC_RENAME, 201 NFSV2PROC_LINK, 202 NFSV2PROC_READDIR, 203 NFSV2PROC_NOOP, 204 NFSV2PROC_STATFS, 205 NFSV2PROC_NOOP, 206 NFSV2PROC_NOOP, 207 NFSV2PROC_NOOP, 208 NFSV2PROC_NOOP, 209 NFSV2PROC_NOOP, 210 NFSV2PROC_NOOP, 211 NFSV2PROC_NOOP, 212 }; 213 214 /* 215 * Maps errno values to nfs error numbers. 216 * Use NFSERR_IO as the catch all for ones not specifically defined in 217 * RFC 1094. 218 */ 219 static const u_char nfsrv_v2errmap[ELAST] = { 220 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 221 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 222 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 223 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 224 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 225 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 226 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 227 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 228 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 229 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 230 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 231 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 232 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 233 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 234 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 235 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 236 NFSERR_IO, NFSERR_IO, 237 }; 238 239 /* 240 * Maps errno values to nfs error numbers. 241 * Although it is not obvious whether or not NFS clients really care if 242 * a returned error value is in the specified list for the procedure, the 243 * safest thing to do is filter them appropriately. For Version 2, the 244 * X/Open XNFS document is the only specification that defines error values 245 * for each RPC (The RFC simply lists all possible error values for all RPCs), 246 * so I have decided to not do this for Version 2. 247 * The first entry is the default error return and the rest are the valid 248 * errors for that RPC in increasing numeric order. 249 */ 250 static const short nfsv3err_null[] = { 251 0, 252 0, 253 }; 254 255 static const short nfsv3err_getattr[] = { 256 NFSERR_IO, 257 NFSERR_IO, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_SERVERFAULT, 261 0, 262 }; 263 264 static const short nfsv3err_setattr[] = { 265 NFSERR_IO, 266 NFSERR_PERM, 267 NFSERR_IO, 268 NFSERR_ACCES, 269 NFSERR_INVAL, 270 NFSERR_NOSPC, 271 NFSERR_ROFS, 272 NFSERR_DQUOT, 273 NFSERR_STALE, 274 NFSERR_BADHANDLE, 275 NFSERR_NOT_SYNC, 276 NFSERR_SERVERFAULT, 277 0, 278 }; 279 280 static const short nfsv3err_lookup[] = { 281 NFSERR_IO, 282 NFSERR_NOENT, 283 NFSERR_IO, 284 NFSERR_ACCES, 285 NFSERR_NOTDIR, 286 NFSERR_NAMETOL, 287 NFSERR_STALE, 288 NFSERR_BADHANDLE, 289 NFSERR_SERVERFAULT, 290 0, 291 }; 292 293 static const short nfsv3err_access[] = { 294 NFSERR_IO, 295 NFSERR_IO, 296 NFSERR_STALE, 297 NFSERR_BADHANDLE, 298 NFSERR_SERVERFAULT, 299 0, 300 }; 301 302 static const short nfsv3err_readlink[] = { 303 NFSERR_IO, 304 NFSERR_IO, 305 NFSERR_ACCES, 306 NFSERR_INVAL, 307 NFSERR_STALE, 308 NFSERR_BADHANDLE, 309 NFSERR_NOTSUPP, 310 NFSERR_SERVERFAULT, 311 0, 312 }; 313 314 static const short nfsv3err_read[] = { 315 NFSERR_IO, 316 NFSERR_IO, 317 NFSERR_NXIO, 318 NFSERR_ACCES, 319 NFSERR_INVAL, 320 NFSERR_STALE, 321 NFSERR_BADHANDLE, 322 NFSERR_SERVERFAULT, 323 NFSERR_JUKEBOX, 324 0, 325 }; 326 327 static const short nfsv3err_write[] = { 328 NFSERR_IO, 329 NFSERR_IO, 330 NFSERR_ACCES, 331 NFSERR_INVAL, 332 NFSERR_FBIG, 333 NFSERR_NOSPC, 334 NFSERR_ROFS, 335 NFSERR_DQUOT, 336 NFSERR_STALE, 337 NFSERR_BADHANDLE, 338 NFSERR_SERVERFAULT, 339 NFSERR_JUKEBOX, 340 0, 341 }; 342 343 static const short nfsv3err_create[] = { 344 NFSERR_IO, 345 NFSERR_IO, 346 NFSERR_ACCES, 347 NFSERR_EXIST, 348 NFSERR_NOTDIR, 349 NFSERR_NOSPC, 350 NFSERR_ROFS, 351 NFSERR_NAMETOL, 352 NFSERR_DQUOT, 353 NFSERR_STALE, 354 NFSERR_BADHANDLE, 355 NFSERR_NOTSUPP, 356 NFSERR_SERVERFAULT, 357 0, 358 }; 359 360 static const short nfsv3err_mkdir[] = { 361 NFSERR_IO, 362 NFSERR_IO, 363 NFSERR_ACCES, 364 NFSERR_EXIST, 365 NFSERR_NOTDIR, 366 NFSERR_NOSPC, 367 NFSERR_ROFS, 368 NFSERR_NAMETOL, 369 NFSERR_DQUOT, 370 NFSERR_STALE, 371 NFSERR_BADHANDLE, 372 NFSERR_NOTSUPP, 373 NFSERR_SERVERFAULT, 374 0, 375 }; 376 377 static const short nfsv3err_symlink[] = { 378 NFSERR_IO, 379 NFSERR_IO, 380 NFSERR_ACCES, 381 NFSERR_EXIST, 382 NFSERR_NOTDIR, 383 NFSERR_NOSPC, 384 NFSERR_ROFS, 385 NFSERR_NAMETOL, 386 NFSERR_DQUOT, 387 NFSERR_STALE, 388 NFSERR_BADHANDLE, 389 NFSERR_NOTSUPP, 390 NFSERR_SERVERFAULT, 391 0, 392 }; 393 394 static const short nfsv3err_mknod[] = { 395 NFSERR_IO, 396 NFSERR_IO, 397 NFSERR_ACCES, 398 NFSERR_EXIST, 399 NFSERR_NOTDIR, 400 NFSERR_NOSPC, 401 NFSERR_ROFS, 402 NFSERR_NAMETOL, 403 NFSERR_DQUOT, 404 NFSERR_STALE, 405 NFSERR_BADHANDLE, 406 NFSERR_NOTSUPP, 407 NFSERR_SERVERFAULT, 408 NFSERR_BADTYPE, 409 0, 410 }; 411 412 static const short nfsv3err_remove[] = { 413 NFSERR_IO, 414 NFSERR_NOENT, 415 NFSERR_IO, 416 NFSERR_ACCES, 417 NFSERR_NOTDIR, 418 NFSERR_ROFS, 419 NFSERR_NAMETOL, 420 NFSERR_STALE, 421 NFSERR_BADHANDLE, 422 NFSERR_SERVERFAULT, 423 0, 424 }; 425 426 static const short nfsv3err_rmdir[] = { 427 NFSERR_IO, 428 NFSERR_NOENT, 429 NFSERR_IO, 430 NFSERR_ACCES, 431 NFSERR_EXIST, 432 NFSERR_NOTDIR, 433 NFSERR_INVAL, 434 NFSERR_ROFS, 435 NFSERR_NAMETOL, 436 NFSERR_NOTEMPTY, 437 NFSERR_STALE, 438 NFSERR_BADHANDLE, 439 NFSERR_NOTSUPP, 440 NFSERR_SERVERFAULT, 441 0, 442 }; 443 444 static const short nfsv3err_rename[] = { 445 NFSERR_IO, 446 NFSERR_NOENT, 447 NFSERR_IO, 448 NFSERR_ACCES, 449 NFSERR_EXIST, 450 NFSERR_XDEV, 451 NFSERR_NOTDIR, 452 NFSERR_ISDIR, 453 NFSERR_INVAL, 454 NFSERR_NOSPC, 455 NFSERR_ROFS, 456 NFSERR_MLINK, 457 NFSERR_NAMETOL, 458 NFSERR_NOTEMPTY, 459 NFSERR_DQUOT, 460 NFSERR_STALE, 461 NFSERR_BADHANDLE, 462 NFSERR_NOTSUPP, 463 NFSERR_SERVERFAULT, 464 0, 465 }; 466 467 static const short nfsv3err_link[] = { 468 NFSERR_IO, 469 NFSERR_IO, 470 NFSERR_ACCES, 471 NFSERR_EXIST, 472 NFSERR_XDEV, 473 NFSERR_NOTDIR, 474 NFSERR_INVAL, 475 NFSERR_NOSPC, 476 NFSERR_ROFS, 477 NFSERR_MLINK, 478 NFSERR_NAMETOL, 479 NFSERR_DQUOT, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_NOTSUPP, 483 NFSERR_SERVERFAULT, 484 0, 485 }; 486 487 static const short nfsv3err_readdir[] = { 488 NFSERR_IO, 489 NFSERR_IO, 490 NFSERR_ACCES, 491 NFSERR_NOTDIR, 492 NFSERR_STALE, 493 NFSERR_BADHANDLE, 494 NFSERR_BAD_COOKIE, 495 NFSERR_TOOSMALL, 496 NFSERR_SERVERFAULT, 497 0, 498 }; 499 500 static const short nfsv3err_readdirplus[] = { 501 NFSERR_IO, 502 NFSERR_IO, 503 NFSERR_ACCES, 504 NFSERR_NOTDIR, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_BAD_COOKIE, 508 NFSERR_NOTSUPP, 509 NFSERR_TOOSMALL, 510 NFSERR_SERVERFAULT, 511 0, 512 }; 513 514 static const short nfsv3err_fsstat[] = { 515 NFSERR_IO, 516 NFSERR_IO, 517 NFSERR_STALE, 518 NFSERR_BADHANDLE, 519 NFSERR_SERVERFAULT, 520 0, 521 }; 522 523 static const short nfsv3err_fsinfo[] = { 524 NFSERR_STALE, 525 NFSERR_STALE, 526 NFSERR_BADHANDLE, 527 NFSERR_SERVERFAULT, 528 0, 529 }; 530 531 static const short nfsv3err_pathconf[] = { 532 NFSERR_STALE, 533 NFSERR_STALE, 534 NFSERR_BADHANDLE, 535 NFSERR_SERVERFAULT, 536 0, 537 }; 538 539 static const short nfsv3err_commit[] = { 540 NFSERR_IO, 541 NFSERR_IO, 542 NFSERR_STALE, 543 NFSERR_BADHANDLE, 544 NFSERR_SERVERFAULT, 545 0, 546 }; 547 548 static const short * const nfsrv_v3errmap[] = { 549 nfsv3err_null, 550 nfsv3err_getattr, 551 nfsv3err_setattr, 552 nfsv3err_lookup, 553 nfsv3err_access, 554 nfsv3err_readlink, 555 nfsv3err_read, 556 nfsv3err_write, 557 nfsv3err_create, 558 nfsv3err_mkdir, 559 nfsv3err_symlink, 560 nfsv3err_mknod, 561 nfsv3err_remove, 562 nfsv3err_rmdir, 563 nfsv3err_rename, 564 nfsv3err_link, 565 nfsv3err_readdir, 566 nfsv3err_readdirplus, 567 nfsv3err_fsstat, 568 nfsv3err_fsinfo, 569 nfsv3err_pathconf, 570 nfsv3err_commit, 571 }; 572 573 extern struct nfsrtt nfsrtt; 574 extern time_t nqnfsstarttime; 575 extern int nqsrv_clockskew; 576 extern int nqsrv_writeslack; 577 extern int nqsrv_maxlease; 578 extern const int nqnfs_piggy[NFS_NPROCS]; 579 extern struct nfsnodehashhead *nfsnodehashtbl; 580 extern u_long nfsnodehash; 581 582 u_long nfsdirhashmask; 583 584 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 585 586 /* 587 * Create the header for an rpc request packet 588 * The hsiz is the size of the rest of the nfs request header. 589 * (just used to decide if a cluster is a good idea) 590 */ 591 struct mbuf * 592 nfsm_reqh(struct nfsnode *np, u_long procid, int hsiz, caddr_t *bposp) 593 { 594 struct mbuf *mb; 595 caddr_t bpos; 596 #ifndef NFS_V2_ONLY 597 struct nfsmount *nmp; 598 u_int32_t *tl; 599 int nqflag; 600 #endif 601 602 mb = m_get(M_WAIT, MT_DATA); 603 MCLAIM(mb, &nfs_mowner); 604 if (hsiz >= MINCLSIZE) 605 m_clget(mb, M_WAIT); 606 mb->m_len = 0; 607 bpos = mtod(mb, caddr_t); 608 609 #ifndef NFS_V2_ONLY 610 /* 611 * For NQNFS, add lease request. 612 */ 613 if (np) { 614 nmp = VFSTONFS(np->n_vnode->v_mount); 615 if (nmp->nm_flag & NFSMNT_NQNFS) { 616 nqflag = NQNFS_NEEDLEASE(np, procid); 617 if (nqflag) { 618 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 619 *tl++ = txdr_unsigned(nqflag); 620 *tl = txdr_unsigned(nmp->nm_leaseterm); 621 } else { 622 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 623 *tl = 0; 624 } 625 } 626 } 627 #endif 628 /* Finally, return values */ 629 *bposp = bpos; 630 return (mb); 631 } 632 633 /* 634 * Build the RPC header and fill in the authorization info. 635 * The authorization string argument is only used when the credentials 636 * come from outside of the kernel. 637 * Returns the head of the mbuf list. 638 */ 639 struct mbuf * 640 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 641 verf_str, mrest, mrest_len, mbp, xidp) 642 kauth_cred_t cr; 643 int nmflag; 644 int procid; 645 int auth_type; 646 int auth_len; 647 char *auth_str; 648 int verf_len; 649 char *verf_str; 650 struct mbuf *mrest; 651 int mrest_len; 652 struct mbuf **mbp; 653 u_int32_t *xidp; 654 { 655 struct mbuf *mb; 656 u_int32_t *tl; 657 caddr_t bpos; 658 int i; 659 struct mbuf *mreq; 660 int siz, grpsiz, authsiz; 661 662 authsiz = nfsm_rndup(auth_len); 663 mb = m_gethdr(M_WAIT, MT_DATA); 664 MCLAIM(mb, &nfs_mowner); 665 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 666 m_clget(mb, M_WAIT); 667 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 668 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 669 } else { 670 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 671 } 672 mb->m_len = 0; 673 mreq = mb; 674 bpos = mtod(mb, caddr_t); 675 676 /* 677 * First the RPC header. 678 */ 679 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 680 681 *tl++ = *xidp = nfs_getxid(); 682 *tl++ = rpc_call; 683 *tl++ = rpc_vers; 684 if (nmflag & NFSMNT_NQNFS) { 685 *tl++ = txdr_unsigned(NQNFS_PROG); 686 *tl++ = txdr_unsigned(NQNFS_VER3); 687 } else { 688 *tl++ = txdr_unsigned(NFS_PROG); 689 if (nmflag & NFSMNT_NFSV3) 690 *tl++ = txdr_unsigned(NFS_VER3); 691 else 692 *tl++ = txdr_unsigned(NFS_VER2); 693 } 694 if (nmflag & NFSMNT_NFSV3) 695 *tl++ = txdr_unsigned(procid); 696 else 697 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 698 699 /* 700 * And then the authorization cred. 701 */ 702 *tl++ = txdr_unsigned(auth_type); 703 *tl = txdr_unsigned(authsiz); 704 switch (auth_type) { 705 case RPCAUTH_UNIX: 706 nfsm_build(tl, u_int32_t *, auth_len); 707 *tl++ = 0; /* stamp ?? */ 708 *tl++ = 0; /* NULL hostname */ 709 *tl++ = txdr_unsigned(kauth_cred_geteuid(cr)); 710 *tl++ = txdr_unsigned(kauth_cred_getegid(cr)); 711 grpsiz = (auth_len >> 2) - 5; 712 *tl++ = txdr_unsigned(grpsiz); 713 for (i = 0; i < grpsiz; i++) 714 *tl++ = txdr_unsigned(kauth_cred_group(cr, i)); /* XXX elad review */ 715 break; 716 case RPCAUTH_KERB4: 717 siz = auth_len; 718 while (siz > 0) { 719 if (M_TRAILINGSPACE(mb) == 0) { 720 struct mbuf *mb2; 721 mb2 = m_get(M_WAIT, MT_DATA); 722 MCLAIM(mb2, &nfs_mowner); 723 if (siz >= MINCLSIZE) 724 m_clget(mb2, M_WAIT); 725 mb->m_next = mb2; 726 mb = mb2; 727 mb->m_len = 0; 728 bpos = mtod(mb, caddr_t); 729 } 730 i = min(siz, M_TRAILINGSPACE(mb)); 731 memcpy(bpos, auth_str, i); 732 mb->m_len += i; 733 auth_str += i; 734 bpos += i; 735 siz -= i; 736 } 737 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 738 for (i = 0; i < siz; i++) 739 *bpos++ = '\0'; 740 mb->m_len += siz; 741 } 742 break; 743 }; 744 745 /* 746 * And the verifier... 747 */ 748 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 749 if (verf_str) { 750 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 751 *tl = txdr_unsigned(verf_len); 752 siz = verf_len; 753 while (siz > 0) { 754 if (M_TRAILINGSPACE(mb) == 0) { 755 struct mbuf *mb2; 756 mb2 = m_get(M_WAIT, MT_DATA); 757 MCLAIM(mb2, &nfs_mowner); 758 if (siz >= MINCLSIZE) 759 m_clget(mb2, M_WAIT); 760 mb->m_next = mb2; 761 mb = mb2; 762 mb->m_len = 0; 763 bpos = mtod(mb, caddr_t); 764 } 765 i = min(siz, M_TRAILINGSPACE(mb)); 766 memcpy(bpos, verf_str, i); 767 mb->m_len += i; 768 verf_str += i; 769 bpos += i; 770 siz -= i; 771 } 772 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 773 for (i = 0; i < siz; i++) 774 *bpos++ = '\0'; 775 mb->m_len += siz; 776 } 777 } else { 778 *tl++ = txdr_unsigned(RPCAUTH_NULL); 779 *tl = 0; 780 } 781 mb->m_next = mrest; 782 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 783 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 784 *mbp = mb; 785 return (mreq); 786 } 787 788 /* 789 * copies mbuf chain to the uio scatter/gather list 790 */ 791 int 792 nfsm_mbuftouio(mrep, uiop, siz, dpos) 793 struct mbuf **mrep; 794 struct uio *uiop; 795 int siz; 796 caddr_t *dpos; 797 { 798 char *mbufcp, *uiocp; 799 int xfer, left, len; 800 struct mbuf *mp; 801 long uiosiz, rem; 802 int error = 0; 803 804 mp = *mrep; 805 mbufcp = *dpos; 806 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 807 rem = nfsm_rndup(siz)-siz; 808 while (siz > 0) { 809 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 810 return (EFBIG); 811 left = uiop->uio_iov->iov_len; 812 uiocp = uiop->uio_iov->iov_base; 813 if (left > siz) 814 left = siz; 815 uiosiz = left; 816 while (left > 0) { 817 while (len == 0) { 818 mp = mp->m_next; 819 if (mp == NULL) 820 return (EBADRPC); 821 mbufcp = mtod(mp, caddr_t); 822 len = mp->m_len; 823 } 824 xfer = (left > len) ? len : left; 825 error = copyout_vmspace(uiop->uio_vmspace, mbufcp, 826 uiocp, xfer); 827 if (error) { 828 return error; 829 } 830 left -= xfer; 831 len -= xfer; 832 mbufcp += xfer; 833 uiocp += xfer; 834 uiop->uio_offset += xfer; 835 uiop->uio_resid -= xfer; 836 } 837 if (uiop->uio_iov->iov_len <= siz) { 838 uiop->uio_iovcnt--; 839 uiop->uio_iov++; 840 } else { 841 uiop->uio_iov->iov_base = 842 (caddr_t)uiop->uio_iov->iov_base + uiosiz; 843 uiop->uio_iov->iov_len -= uiosiz; 844 } 845 siz -= uiosiz; 846 } 847 *dpos = mbufcp; 848 *mrep = mp; 849 if (rem > 0) { 850 if (len < rem) 851 error = nfs_adv(mrep, dpos, rem, len); 852 else 853 *dpos += rem; 854 } 855 return (error); 856 } 857 858 /* 859 * copies a uio scatter/gather list to an mbuf chain. 860 * NOTE: can ony handle iovcnt == 1 861 */ 862 int 863 nfsm_uiotombuf(uiop, mq, siz, bpos) 864 struct uio *uiop; 865 struct mbuf **mq; 866 int siz; 867 caddr_t *bpos; 868 { 869 char *uiocp; 870 struct mbuf *mp, *mp2; 871 int xfer, left, mlen; 872 int uiosiz, clflg, rem; 873 char *cp; 874 int error; 875 876 #ifdef DIAGNOSTIC 877 if (uiop->uio_iovcnt != 1) 878 panic("nfsm_uiotombuf: iovcnt != 1"); 879 #endif 880 881 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 882 clflg = 1; 883 else 884 clflg = 0; 885 rem = nfsm_rndup(siz)-siz; 886 mp = mp2 = *mq; 887 while (siz > 0) { 888 left = uiop->uio_iov->iov_len; 889 uiocp = uiop->uio_iov->iov_base; 890 if (left > siz) 891 left = siz; 892 uiosiz = left; 893 while (left > 0) { 894 mlen = M_TRAILINGSPACE(mp); 895 if (mlen == 0) { 896 mp = m_get(M_WAIT, MT_DATA); 897 MCLAIM(mp, &nfs_mowner); 898 if (clflg) 899 m_clget(mp, M_WAIT); 900 mp->m_len = 0; 901 mp2->m_next = mp; 902 mp2 = mp; 903 mlen = M_TRAILINGSPACE(mp); 904 } 905 xfer = (left > mlen) ? mlen : left; 906 cp = mtod(mp, caddr_t) + mp->m_len; 907 error = copyin_vmspace(uiop->uio_vmspace, uiocp, cp, 908 xfer); 909 if (error) { 910 /* XXX */ 911 } 912 mp->m_len += xfer; 913 left -= xfer; 914 uiocp += xfer; 915 uiop->uio_offset += xfer; 916 uiop->uio_resid -= xfer; 917 } 918 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 919 uiosiz; 920 uiop->uio_iov->iov_len -= uiosiz; 921 siz -= uiosiz; 922 } 923 if (rem > 0) { 924 if (rem > M_TRAILINGSPACE(mp)) { 925 mp = m_get(M_WAIT, MT_DATA); 926 MCLAIM(mp, &nfs_mowner); 927 mp->m_len = 0; 928 mp2->m_next = mp; 929 } 930 cp = mtod(mp, caddr_t) + mp->m_len; 931 for (left = 0; left < rem; left++) 932 *cp++ = '\0'; 933 mp->m_len += rem; 934 *bpos = cp; 935 } else 936 *bpos = mtod(mp, caddr_t)+mp->m_len; 937 *mq = mp; 938 return (0); 939 } 940 941 /* 942 * Get at least "siz" bytes of correctly aligned data. 943 * When called the mbuf pointers are not necessarily correct, 944 * dsosp points to what ought to be in m_data and left contains 945 * what ought to be in m_len. 946 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 947 * cases. (The macros use the vars. dpos and dpos2) 948 */ 949 int 950 nfsm_disct(mdp, dposp, siz, left, cp2) 951 struct mbuf **mdp; 952 caddr_t *dposp; 953 int siz; 954 int left; 955 caddr_t *cp2; 956 { 957 struct mbuf *m1, *m2; 958 struct mbuf *havebuf = NULL; 959 caddr_t src = *dposp; 960 caddr_t dst; 961 int len; 962 963 #ifdef DEBUG 964 if (left < 0) 965 panic("nfsm_disct: left < 0"); 966 #endif 967 m1 = *mdp; 968 /* 969 * Skip through the mbuf chain looking for an mbuf with 970 * some data. If the first mbuf found has enough data 971 * and it is correctly aligned return it. 972 */ 973 while (left == 0) { 974 havebuf = m1; 975 *mdp = m1 = m1->m_next; 976 if (m1 == NULL) 977 return (EBADRPC); 978 src = mtod(m1, caddr_t); 979 left = m1->m_len; 980 /* 981 * If we start a new mbuf and it is big enough 982 * and correctly aligned just return it, don't 983 * do any pull up. 984 */ 985 if (left >= siz && nfsm_aligned(src)) { 986 *cp2 = src; 987 *dposp = src + siz; 988 return (0); 989 } 990 } 991 if (m1->m_flags & M_EXT) { 992 if (havebuf) { 993 /* If the first mbuf with data has external data 994 * and there is a previous empty mbuf use it 995 * to move the data into. 996 */ 997 m2 = m1; 998 *mdp = m1 = havebuf; 999 if (m1->m_flags & M_EXT) { 1000 MEXTREMOVE(m1); 1001 } 1002 } else { 1003 /* 1004 * If the first mbuf has a external data 1005 * and there is no previous empty mbuf 1006 * allocate a new mbuf and move the external 1007 * data to the new mbuf. Also make the first 1008 * mbuf look empty. 1009 */ 1010 m2 = m_get(M_WAIT, MT_DATA); 1011 m2->m_ext = m1->m_ext; 1012 m2->m_data = src; 1013 m2->m_len = left; 1014 MCLADDREFERENCE(m1, m2); 1015 MEXTREMOVE(m1); 1016 m2->m_next = m1->m_next; 1017 m1->m_next = m2; 1018 } 1019 m1->m_len = 0; 1020 if (m1->m_flags & M_PKTHDR) 1021 dst = m1->m_pktdat; 1022 else 1023 dst = m1->m_dat; 1024 m1->m_data = dst; 1025 } else { 1026 /* 1027 * If the first mbuf has no external data 1028 * move the data to the front of the mbuf. 1029 */ 1030 if (m1->m_flags & M_PKTHDR) 1031 dst = m1->m_pktdat; 1032 else 1033 dst = m1->m_dat; 1034 m1->m_data = dst; 1035 if (dst != src) 1036 memmove(dst, src, left); 1037 dst += left; 1038 m1->m_len = left; 1039 m2 = m1->m_next; 1040 } 1041 *cp2 = m1->m_data; 1042 *dposp = mtod(m1, caddr_t) + siz; 1043 /* 1044 * Loop through mbufs pulling data up into first mbuf until 1045 * the first mbuf is full or there is no more data to 1046 * pullup. 1047 */ 1048 while ((len = M_TRAILINGSPACE(m1)) != 0 && m2) { 1049 if ((len = min(len, m2->m_len)) != 0) 1050 memcpy(dst, m2->m_data, len); 1051 m1->m_len += len; 1052 dst += len; 1053 m2->m_data += len; 1054 m2->m_len -= len; 1055 m2 = m2->m_next; 1056 } 1057 if (m1->m_len < siz) 1058 return (EBADRPC); 1059 return (0); 1060 } 1061 1062 /* 1063 * Advance the position in the mbuf chain. 1064 */ 1065 int 1066 nfs_adv(mdp, dposp, offs, left) 1067 struct mbuf **mdp; 1068 caddr_t *dposp; 1069 int offs; 1070 int left; 1071 { 1072 struct mbuf *m; 1073 int s; 1074 1075 m = *mdp; 1076 s = left; 1077 while (s < offs) { 1078 offs -= s; 1079 m = m->m_next; 1080 if (m == NULL) 1081 return (EBADRPC); 1082 s = m->m_len; 1083 } 1084 *mdp = m; 1085 *dposp = mtod(m, caddr_t)+offs; 1086 return (0); 1087 } 1088 1089 /* 1090 * Copy a string into mbufs for the hard cases... 1091 */ 1092 int 1093 nfsm_strtmbuf(mb, bpos, cp, siz) 1094 struct mbuf **mb; 1095 char **bpos; 1096 const char *cp; 1097 long siz; 1098 { 1099 struct mbuf *m1 = NULL, *m2; 1100 long left, xfer, len, tlen; 1101 u_int32_t *tl; 1102 int putsize; 1103 1104 putsize = 1; 1105 m2 = *mb; 1106 left = M_TRAILINGSPACE(m2); 1107 if (left > 0) { 1108 tl = ((u_int32_t *)(*bpos)); 1109 *tl++ = txdr_unsigned(siz); 1110 putsize = 0; 1111 left -= NFSX_UNSIGNED; 1112 m2->m_len += NFSX_UNSIGNED; 1113 if (left > 0) { 1114 memcpy((caddr_t) tl, cp, left); 1115 siz -= left; 1116 cp += left; 1117 m2->m_len += left; 1118 left = 0; 1119 } 1120 } 1121 /* Loop around adding mbufs */ 1122 while (siz > 0) { 1123 m1 = m_get(M_WAIT, MT_DATA); 1124 MCLAIM(m1, &nfs_mowner); 1125 if (siz > MLEN) 1126 m_clget(m1, M_WAIT); 1127 m1->m_len = NFSMSIZ(m1); 1128 m2->m_next = m1; 1129 m2 = m1; 1130 tl = mtod(m1, u_int32_t *); 1131 tlen = 0; 1132 if (putsize) { 1133 *tl++ = txdr_unsigned(siz); 1134 m1->m_len -= NFSX_UNSIGNED; 1135 tlen = NFSX_UNSIGNED; 1136 putsize = 0; 1137 } 1138 if (siz < m1->m_len) { 1139 len = nfsm_rndup(siz); 1140 xfer = siz; 1141 if (xfer < len) 1142 *(tl+(xfer>>2)) = 0; 1143 } else { 1144 xfer = len = m1->m_len; 1145 } 1146 memcpy((caddr_t) tl, cp, xfer); 1147 m1->m_len = len+tlen; 1148 siz -= xfer; 1149 cp += xfer; 1150 } 1151 *mb = m1; 1152 *bpos = mtod(m1, caddr_t)+m1->m_len; 1153 return (0); 1154 } 1155 1156 /* 1157 * Directory caching routines. They work as follows: 1158 * - a cache is maintained per VDIR nfsnode. 1159 * - for each offset cookie that is exported to userspace, and can 1160 * thus be thrown back at us as an offset to VOP_READDIR, store 1161 * information in the cache. 1162 * - cached are: 1163 * - cookie itself 1164 * - blocknumber (essentially just a search key in the buffer cache) 1165 * - entry number in block. 1166 * - offset cookie of block in which this entry is stored 1167 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1168 * - entries are looked up in a hash table 1169 * - also maintained is an LRU list of entries, used to determine 1170 * which ones to delete if the cache grows too large. 1171 * - if 32 <-> 64 translation mode is requested for a filesystem, 1172 * the cache also functions as a translation table 1173 * - in the translation case, invalidating the cache does not mean 1174 * flushing it, but just marking entries as invalid, except for 1175 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1176 * still be able to use the cache as a translation table. 1177 * - 32 bit cookies are uniquely created by combining the hash table 1178 * entry value, and one generation count per hash table entry, 1179 * incremented each time an entry is appended to the chain. 1180 * - the cache is invalidated each time a direcory is modified 1181 * - sanity checks are also done; if an entry in a block turns 1182 * out not to have a matching cookie, the cache is invalidated 1183 * and a new block starting from the wanted offset is fetched from 1184 * the server. 1185 * - directory entries as read from the server are extended to contain 1186 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1187 * the cache and exporting them to userspace through the cookie 1188 * argument to VOP_READDIR. 1189 */ 1190 1191 u_long 1192 nfs_dirhash(off) 1193 off_t off; 1194 { 1195 int i; 1196 char *cp = (char *)&off; 1197 u_long sum = 0L; 1198 1199 for (i = 0 ; i < sizeof (off); i++) 1200 sum += *cp++; 1201 1202 return sum; 1203 } 1204 1205 #define _NFSDC_MTX(np) (&NFSTOV(np)->v_interlock) 1206 #define NFSDC_LOCK(np) simple_lock(_NFSDC_MTX(np)) 1207 #define NFSDC_UNLOCK(np) simple_unlock(_NFSDC_MTX(np)) 1208 #define NFSDC_ASSERT_LOCKED(np) LOCK_ASSERT(simple_lock_held(_NFSDC_MTX(np))) 1209 1210 void 1211 nfs_initdircache(vp) 1212 struct vnode *vp; 1213 { 1214 struct nfsnode *np = VTONFS(vp); 1215 struct nfsdirhashhead *dircache; 1216 1217 dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, M_NFSDIROFF, 1218 M_WAITOK, &nfsdirhashmask); 1219 1220 NFSDC_LOCK(np); 1221 if (np->n_dircache == NULL) { 1222 np->n_dircachesize = 0; 1223 np->n_dircache = dircache; 1224 dircache = NULL; 1225 TAILQ_INIT(&np->n_dirchain); 1226 } 1227 NFSDC_UNLOCK(np); 1228 if (dircache) 1229 hashdone(dircache, M_NFSDIROFF); 1230 } 1231 1232 void 1233 nfs_initdirxlatecookie(vp) 1234 struct vnode *vp; 1235 { 1236 struct nfsnode *np = VTONFS(vp); 1237 unsigned *dirgens; 1238 1239 KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1240 1241 dirgens = malloc(NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1242 M_WAITOK|M_ZERO); 1243 NFSDC_LOCK(np); 1244 if (np->n_dirgens == NULL) { 1245 np->n_dirgens = dirgens; 1246 dirgens = NULL; 1247 } 1248 NFSDC_UNLOCK(np); 1249 if (dirgens) 1250 free(dirgens, M_NFSDIROFF); 1251 } 1252 1253 static const struct nfsdircache dzero; 1254 1255 static void nfs_unlinkdircache __P((struct nfsnode *np, struct nfsdircache *)); 1256 static void nfs_putdircache_unlocked __P((struct nfsnode *, 1257 struct nfsdircache *)); 1258 1259 static void 1260 nfs_unlinkdircache(np, ndp) 1261 struct nfsnode *np; 1262 struct nfsdircache *ndp; 1263 { 1264 1265 NFSDC_ASSERT_LOCKED(np); 1266 KASSERT(ndp != &dzero); 1267 1268 if (LIST_NEXT(ndp, dc_hash) == (void *)-1) 1269 return; 1270 1271 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1272 LIST_REMOVE(ndp, dc_hash); 1273 LIST_NEXT(ndp, dc_hash) = (void *)-1; /* mark as unlinked */ 1274 1275 nfs_putdircache_unlocked(np, ndp); 1276 } 1277 1278 void 1279 nfs_putdircache(np, ndp) 1280 struct nfsnode *np; 1281 struct nfsdircache *ndp; 1282 { 1283 int ref; 1284 1285 if (ndp == &dzero) 1286 return; 1287 1288 KASSERT(ndp->dc_refcnt > 0); 1289 NFSDC_LOCK(np); 1290 ref = --ndp->dc_refcnt; 1291 NFSDC_UNLOCK(np); 1292 1293 if (ref == 0) 1294 free(ndp, M_NFSDIROFF); 1295 } 1296 1297 static void 1298 nfs_putdircache_unlocked(struct nfsnode *np, struct nfsdircache *ndp) 1299 { 1300 int ref; 1301 1302 NFSDC_ASSERT_LOCKED(np); 1303 1304 if (ndp == &dzero) 1305 return; 1306 1307 KASSERT(ndp->dc_refcnt > 0); 1308 ref = --ndp->dc_refcnt; 1309 if (ref == 0) 1310 free(ndp, M_NFSDIROFF); 1311 } 1312 1313 struct nfsdircache * 1314 nfs_searchdircache(vp, off, do32, hashent) 1315 struct vnode *vp; 1316 off_t off; 1317 int do32; 1318 int *hashent; 1319 { 1320 struct nfsdirhashhead *ndhp; 1321 struct nfsdircache *ndp = NULL; 1322 struct nfsnode *np = VTONFS(vp); 1323 unsigned ent; 1324 1325 /* 1326 * Zero is always a valid cookie. 1327 */ 1328 if (off == 0) 1329 /* XXXUNCONST */ 1330 return (struct nfsdircache *)__UNCONST(&dzero); 1331 1332 if (!np->n_dircache) 1333 return NULL; 1334 1335 /* 1336 * We use a 32bit cookie as search key, directly reconstruct 1337 * the hashentry. Else use the hashfunction. 1338 */ 1339 if (do32) { 1340 ent = (u_int32_t)off >> 24; 1341 if (ent >= NFS_DIRHASHSIZ) 1342 return NULL; 1343 ndhp = &np->n_dircache[ent]; 1344 } else { 1345 ndhp = NFSDIRHASH(np, off); 1346 } 1347 1348 if (hashent) 1349 *hashent = (int)(ndhp - np->n_dircache); 1350 1351 NFSDC_LOCK(np); 1352 if (do32) { 1353 LIST_FOREACH(ndp, ndhp, dc_hash) { 1354 if (ndp->dc_cookie32 == (u_int32_t)off) { 1355 /* 1356 * An invalidated entry will become the 1357 * start of a new block fetched from 1358 * the server. 1359 */ 1360 if (ndp->dc_flags & NFSDC_INVALID) { 1361 ndp->dc_blkcookie = ndp->dc_cookie; 1362 ndp->dc_entry = 0; 1363 ndp->dc_flags &= ~NFSDC_INVALID; 1364 } 1365 break; 1366 } 1367 } 1368 } else { 1369 LIST_FOREACH(ndp, ndhp, dc_hash) { 1370 if (ndp->dc_cookie == off) 1371 break; 1372 } 1373 } 1374 if (ndp != NULL) 1375 ndp->dc_refcnt++; 1376 NFSDC_UNLOCK(np); 1377 return ndp; 1378 } 1379 1380 1381 struct nfsdircache * 1382 nfs_enterdircache(struct vnode *vp, off_t off, off_t blkoff, int en, 1383 daddr_t blkno) 1384 { 1385 struct nfsnode *np = VTONFS(vp); 1386 struct nfsdirhashhead *ndhp; 1387 struct nfsdircache *ndp = NULL; 1388 struct nfsdircache *newndp = NULL; 1389 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1390 int hashent = 0, gen, overwrite; /* XXX: GCC */ 1391 1392 /* 1393 * XXX refuse entries for offset 0. amd(8) erroneously sets 1394 * cookie 0 for the '.' entry, making this necessary. This 1395 * isn't so bad, as 0 is a special case anyway. 1396 */ 1397 if (off == 0) 1398 /* XXXUNCONST */ 1399 return (struct nfsdircache *)__UNCONST(&dzero); 1400 1401 if (!np->n_dircache) 1402 /* 1403 * XXX would like to do this in nfs_nget but vtype 1404 * isn't known at that time. 1405 */ 1406 nfs_initdircache(vp); 1407 1408 if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1409 nfs_initdirxlatecookie(vp); 1410 1411 retry: 1412 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1413 1414 NFSDC_LOCK(np); 1415 if (ndp && (ndp->dc_flags & NFSDC_INVALID) == 0) { 1416 /* 1417 * Overwriting an old entry. Check if it's the same. 1418 * If so, just return. If not, remove the old entry. 1419 */ 1420 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1421 goto done; 1422 nfs_unlinkdircache(np, ndp); 1423 nfs_putdircache_unlocked(np, ndp); 1424 ndp = NULL; 1425 } 1426 1427 ndhp = &np->n_dircache[hashent]; 1428 1429 if (!ndp) { 1430 if (newndp == NULL) { 1431 NFSDC_UNLOCK(np); 1432 newndp = malloc(sizeof(*ndp), M_NFSDIROFF, M_WAITOK); 1433 newndp->dc_refcnt = 1; 1434 LIST_NEXT(newndp, dc_hash) = (void *)-1; 1435 goto retry; 1436 } 1437 ndp = newndp; 1438 newndp = NULL; 1439 overwrite = 0; 1440 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1441 /* 1442 * We're allocating a new entry, so bump the 1443 * generation number. 1444 */ 1445 KASSERT(np->n_dirgens); 1446 gen = ++np->n_dirgens[hashent]; 1447 if (gen == 0) { 1448 np->n_dirgens[hashent]++; 1449 gen++; 1450 } 1451 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1452 } 1453 } else 1454 overwrite = 1; 1455 1456 ndp->dc_cookie = off; 1457 ndp->dc_blkcookie = blkoff; 1458 ndp->dc_entry = en; 1459 ndp->dc_flags = 0; 1460 1461 if (overwrite) 1462 goto done; 1463 1464 /* 1465 * If the maximum directory cookie cache size has been reached 1466 * for this node, take one off the front. The idea is that 1467 * directories are typically read front-to-back once, so that 1468 * the oldest entries can be thrown away without much performance 1469 * loss. 1470 */ 1471 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1472 nfs_unlinkdircache(np, TAILQ_FIRST(&np->n_dirchain)); 1473 } else 1474 np->n_dircachesize++; 1475 1476 KASSERT(ndp->dc_refcnt == 1); 1477 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1478 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1479 ndp->dc_refcnt++; 1480 done: 1481 KASSERT(ndp->dc_refcnt > 0); 1482 NFSDC_UNLOCK(np); 1483 if (newndp) 1484 nfs_putdircache(np, newndp); 1485 return ndp; 1486 } 1487 1488 void 1489 nfs_invaldircache(vp, flags) 1490 struct vnode *vp; 1491 int flags; 1492 { 1493 struct nfsnode *np = VTONFS(vp); 1494 struct nfsdircache *ndp = NULL; 1495 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1496 const boolean_t forcefree = flags & NFS_INVALDIRCACHE_FORCE; 1497 1498 #ifdef DIAGNOSTIC 1499 if (vp->v_type != VDIR) 1500 panic("nfs: invaldircache: not dir"); 1501 #endif 1502 1503 if ((flags & NFS_INVALDIRCACHE_KEEPEOF) == 0) 1504 np->n_flag &= ~NEOFVALID; 1505 1506 if (!np->n_dircache) 1507 return; 1508 1509 NFSDC_LOCK(np); 1510 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1511 while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != NULL) { 1512 KASSERT(!forcefree || ndp->dc_refcnt == 1); 1513 nfs_unlinkdircache(np, ndp); 1514 } 1515 np->n_dircachesize = 0; 1516 if (forcefree && np->n_dirgens) { 1517 FREE(np->n_dirgens, M_NFSDIROFF); 1518 np->n_dirgens = NULL; 1519 } 1520 } else { 1521 TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) 1522 ndp->dc_flags |= NFSDC_INVALID; 1523 } 1524 1525 NFSDC_UNLOCK(np); 1526 } 1527 1528 /* 1529 * Called once before VFS init to initialize shared and 1530 * server-specific data structures. 1531 */ 1532 static int 1533 nfs_init0(void) 1534 { 1535 nfsrtt.pos = 0; 1536 rpc_vers = txdr_unsigned(RPC_VER2); 1537 rpc_call = txdr_unsigned(RPC_CALL); 1538 rpc_reply = txdr_unsigned(RPC_REPLY); 1539 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1540 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1541 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1542 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1543 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1544 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1545 nfs_prog = txdr_unsigned(NFS_PROG); 1546 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1547 nfs_true = txdr_unsigned(TRUE); 1548 nfs_false = txdr_unsigned(FALSE); 1549 nfs_xdrneg1 = txdr_unsigned(-1); 1550 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1551 if (nfs_ticks < 1) 1552 nfs_ticks = 1; 1553 #ifdef NFSSERVER 1554 nfsrv_init(0); /* Init server data structures */ 1555 nfsrv_initcache(); /* Init the server request cache */ 1556 #endif /* NFSSERVER */ 1557 1558 #if defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) 1559 nfsdreq_init(); 1560 #endif /* defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) */ 1561 1562 #if defined(NFSSERVER) || !defined(NFS_V2_ONLY) 1563 /* 1564 * Initialize the nqnfs data structures. 1565 */ 1566 if (nqnfsstarttime == 0) { 1567 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1568 + nqsrv_clockskew + nqsrv_writeslack; 1569 NQLOADNOVRAM(nqnfsstarttime); 1570 CIRCLEQ_INIT(&nqtimerhead); 1571 nqfhhashtbl = hashinit(NQLCHSZ, HASH_LIST, M_NQLEASE, 1572 M_WAITOK, &nqfhhash); 1573 } 1574 #endif 1575 1576 exithook_establish(nfs_exit, NULL); 1577 1578 /* 1579 * Initialize reply list and start timer 1580 */ 1581 TAILQ_INIT(&nfs_reqq); 1582 nfs_timer(NULL); 1583 MOWNER_ATTACH(&nfs_mowner); 1584 1585 #ifdef NFS 1586 /* Initialize the kqueue structures */ 1587 nfs_kqinit(); 1588 /* Initialize the iod structures */ 1589 nfs_iodinit(); 1590 #endif 1591 return 0; 1592 } 1593 1594 void 1595 nfs_init(void) 1596 { 1597 static ONCE_DECL(nfs_init_once); 1598 1599 RUN_ONCE(&nfs_init_once, nfs_init0); 1600 } 1601 1602 #ifdef NFS 1603 /* 1604 * Called once at VFS init to initialize client-specific data structures. 1605 */ 1606 void 1607 nfs_vfs_init() 1608 { 1609 /* Initialize NFS server / client shared data. */ 1610 nfs_init(); 1611 1612 nfs_nhinit(); /* Init the nfsnode table */ 1613 nfs_commitsize = uvmexp.npages << (PAGE_SHIFT - 4); 1614 } 1615 1616 void 1617 nfs_vfs_reinit() 1618 { 1619 nfs_nhreinit(); 1620 } 1621 1622 void 1623 nfs_vfs_done() 1624 { 1625 nfs_nhdone(); 1626 } 1627 1628 /* 1629 * Attribute cache routines. 1630 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1631 * that are on the mbuf list 1632 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1633 * error otherwise 1634 */ 1635 1636 /* 1637 * Load the attribute cache (that lives in the nfsnode entry) with 1638 * the values on the mbuf list and 1639 * Iff vap not NULL 1640 * copy the attributes to *vaper 1641 */ 1642 int 1643 nfsm_loadattrcache(vpp, mdp, dposp, vaper, flags) 1644 struct vnode **vpp; 1645 struct mbuf **mdp; 1646 caddr_t *dposp; 1647 struct vattr *vaper; 1648 int flags; 1649 { 1650 int32_t t1; 1651 caddr_t cp2; 1652 int error = 0; 1653 struct mbuf *md; 1654 int v3 = NFS_ISV3(*vpp); 1655 1656 md = *mdp; 1657 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1658 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1659 if (error) 1660 return (error); 1661 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); 1662 } 1663 1664 int 1665 nfs_loadattrcache(vpp, fp, vaper, flags) 1666 struct vnode **vpp; 1667 struct nfs_fattr *fp; 1668 struct vattr *vaper; 1669 int flags; 1670 { 1671 struct vnode *vp = *vpp; 1672 struct vattr *vap; 1673 int v3 = NFS_ISV3(vp); 1674 enum vtype vtyp; 1675 u_short vmode; 1676 struct timespec mtime; 1677 struct timespec ctime; 1678 struct vnode *nvp; 1679 int32_t rdev; 1680 struct nfsnode *np; 1681 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1682 uid_t uid; 1683 gid_t gid; 1684 1685 if (v3) { 1686 vtyp = nfsv3tov_type(fp->fa_type); 1687 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1688 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 1689 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 1690 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1691 fxdr_nfsv3time(&fp->fa3_ctime, &ctime); 1692 } else { 1693 vtyp = nfsv2tov_type(fp->fa_type); 1694 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1695 if (vtyp == VNON || vtyp == VREG) 1696 vtyp = IFTOVT(vmode); 1697 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1698 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1699 ctime.tv_sec = fxdr_unsigned(u_int32_t, 1700 fp->fa2_ctime.nfsv2_sec); 1701 ctime.tv_nsec = 0; 1702 1703 /* 1704 * Really ugly NFSv2 kludge. 1705 */ 1706 if (vtyp == VCHR && rdev == 0xffffffff) 1707 vtyp = VFIFO; 1708 } 1709 1710 vmode &= ALLPERMS; 1711 1712 /* 1713 * If v_type == VNON it is a new node, so fill in the v_type, 1714 * n_mtime fields. Check to see if it represents a special 1715 * device, and if so, check for a possible alias. Once the 1716 * correct vnode has been obtained, fill in the rest of the 1717 * information. 1718 */ 1719 np = VTONFS(vp); 1720 if (vp->v_type == VNON) { 1721 vp->v_type = vtyp; 1722 if (vp->v_type == VFIFO) { 1723 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1724 vp->v_op = fifo_nfsv2nodeop_p; 1725 } else if (vp->v_type == VREG) { 1726 lockinit(&np->n_commitlock, PINOD, "nfsclock", 0, 0); 1727 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1728 vp->v_op = spec_nfsv2nodeop_p; 1729 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1730 if (nvp) { 1731 /* 1732 * Discard unneeded vnode, but save its nfsnode. 1733 * Since the nfsnode does not have a lock, its 1734 * vnode lock has to be carried over. 1735 */ 1736 /* 1737 * XXX is the old node sure to be locked here? 1738 */ 1739 KASSERT(lockstatus(&vp->v_lock) == 1740 LK_EXCLUSIVE); 1741 nvp->v_data = vp->v_data; 1742 vp->v_data = NULL; 1743 VOP_UNLOCK(vp, 0); 1744 vp->v_op = spec_vnodeop_p; 1745 vrele(vp); 1746 vgone(vp); 1747 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, 1748 &nvp->v_interlock); 1749 /* 1750 * Reinitialize aliased node. 1751 */ 1752 np->n_vnode = nvp; 1753 *vpp = vp = nvp; 1754 } 1755 } 1756 np->n_mtime = mtime; 1757 } 1758 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1759 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1760 vap = np->n_vattr; 1761 1762 /* 1763 * Invalidate access cache if uid, gid, mode or ctime changed. 1764 */ 1765 if (np->n_accstamp != -1 && 1766 (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode 1767 || timespeccmp(&ctime, &vap->va_ctime, !=))) 1768 np->n_accstamp = -1; 1769 1770 vap->va_type = vtyp; 1771 vap->va_mode = vmode; 1772 vap->va_rdev = (dev_t)rdev; 1773 vap->va_mtime = mtime; 1774 vap->va_ctime = ctime; 1775 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1776 switch (vtyp) { 1777 case VDIR: 1778 vap->va_blocksize = NFS_DIRFRAGSIZ; 1779 break; 1780 case VBLK: 1781 vap->va_blocksize = BLKDEV_IOSIZE; 1782 break; 1783 case VCHR: 1784 vap->va_blocksize = MAXBSIZE; 1785 break; 1786 default: 1787 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1788 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1789 break; 1790 } 1791 if (v3) { 1792 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1793 vap->va_uid = uid; 1794 vap->va_gid = gid; 1795 vap->va_size = fxdr_hyper(&fp->fa3_size); 1796 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1797 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 1798 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1799 vap->va_flags = 0; 1800 vap->va_filerev = 0; 1801 } else { 1802 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1803 vap->va_uid = uid; 1804 vap->va_gid = gid; 1805 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1806 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1807 * NFS_FABLKSIZE; 1808 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1809 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1810 vap->va_flags = 0; 1811 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1812 vap->va_filerev = 0; 1813 } 1814 if (vap->va_size != np->n_size) { 1815 if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { 1816 vap->va_size = np->n_size; 1817 } else { 1818 np->n_size = vap->va_size; 1819 if (vap->va_type == VREG) { 1820 /* 1821 * we can't free pages if NAC_NOTRUNC because 1822 * the pages can be owned by ourselves. 1823 */ 1824 if (flags & NAC_NOTRUNC) { 1825 np->n_flag |= NTRUNCDELAYED; 1826 } else { 1827 genfs_node_wrlock(vp); 1828 simple_lock(&vp->v_interlock); 1829 (void)VOP_PUTPAGES(vp, 0, 1830 0, PGO_SYNCIO | PGO_CLEANIT | 1831 PGO_FREE | PGO_ALLPAGES); 1832 uvm_vnp_setsize(vp, np->n_size); 1833 genfs_node_unlock(vp); 1834 } 1835 } 1836 } 1837 } 1838 np->n_attrstamp = time_second; 1839 if (vaper != NULL) { 1840 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(*vap)); 1841 if (np->n_flag & NCHG) { 1842 if (np->n_flag & NACC) 1843 vaper->va_atime = np->n_atim; 1844 if (np->n_flag & NUPD) 1845 vaper->va_mtime = np->n_mtim; 1846 } 1847 } 1848 return (0); 1849 } 1850 1851 /* 1852 * Check the time stamp 1853 * If the cache is valid, copy contents to *vap and return 0 1854 * otherwise return an error 1855 */ 1856 int 1857 nfs_getattrcache(vp, vaper) 1858 struct vnode *vp; 1859 struct vattr *vaper; 1860 { 1861 struct nfsnode *np = VTONFS(vp); 1862 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1863 struct vattr *vap; 1864 1865 if (np->n_attrstamp == 0 || 1866 (time_second - np->n_attrstamp) >= NFS_ATTRTIMEO(nmp, np)) { 1867 nfsstats.attrcache_misses++; 1868 return (ENOENT); 1869 } 1870 nfsstats.attrcache_hits++; 1871 vap = np->n_vattr; 1872 if (vap->va_size != np->n_size) { 1873 if (vap->va_type == VREG) { 1874 if (np->n_flag & NMODIFIED) { 1875 if (vap->va_size < np->n_size) 1876 vap->va_size = np->n_size; 1877 else 1878 np->n_size = vap->va_size; 1879 } else 1880 np->n_size = vap->va_size; 1881 genfs_node_wrlock(vp); 1882 uvm_vnp_setsize(vp, np->n_size); 1883 genfs_node_unlock(vp); 1884 } else 1885 np->n_size = vap->va_size; 1886 } 1887 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(struct vattr)); 1888 if (np->n_flag & NCHG) { 1889 if (np->n_flag & NACC) 1890 vaper->va_atime = np->n_atim; 1891 if (np->n_flag & NUPD) 1892 vaper->va_mtime = np->n_mtim; 1893 } 1894 return (0); 1895 } 1896 1897 void 1898 nfs_delayedtruncate(vp) 1899 struct vnode *vp; 1900 { 1901 struct nfsnode *np = VTONFS(vp); 1902 1903 if (np->n_flag & NTRUNCDELAYED) { 1904 np->n_flag &= ~NTRUNCDELAYED; 1905 genfs_node_wrlock(vp); 1906 simple_lock(&vp->v_interlock); 1907 (void)VOP_PUTPAGES(vp, 0, 1908 0, PGO_SYNCIO | PGO_CLEANIT | PGO_FREE | PGO_ALLPAGES); 1909 uvm_vnp_setsize(vp, np->n_size); 1910 genfs_node_unlock(vp); 1911 } 1912 } 1913 1914 #define NFS_WCCKLUDGE_TIMEOUT (24 * 60 * 60) /* 1 day */ 1915 #define NFS_WCCKLUDGE(nmp, now) \ 1916 (((nmp)->nm_iflag & NFSMNT_WCCKLUDGE) && \ 1917 ((now) - (nmp)->nm_wcckludgetime - NFS_WCCKLUDGE_TIMEOUT) < 0) 1918 1919 /* 1920 * nfs_check_wccdata: check inaccurate wcc_data 1921 * 1922 * => return non-zero if we shouldn't trust the wcc_data. 1923 * => NFS_WCCKLUDGE_TIMEOUT is for the case that the server is "fixed". 1924 */ 1925 1926 int 1927 nfs_check_wccdata(struct nfsnode *np, const struct timespec *ctime, 1928 struct timespec *mtime, boolean_t docheck) 1929 { 1930 int error = 0; 1931 1932 #if !defined(NFS_V2_ONLY) 1933 1934 if (docheck) { 1935 struct vnode *vp = NFSTOV(np); 1936 struct nfsmount *nmp; 1937 long now = time_second; 1938 #if defined(DEBUG) 1939 const char *reason = NULL; /* XXX: gcc */ 1940 #endif 1941 1942 if (timespeccmp(&np->n_vattr->va_mtime, mtime, <=)) { 1943 #if defined(DEBUG) 1944 reason = "mtime"; 1945 #endif 1946 error = EINVAL; 1947 } 1948 1949 if (vp->v_type == VDIR && 1950 timespeccmp(&np->n_vattr->va_ctime, ctime, <=)) { 1951 #if defined(DEBUG) 1952 reason = "ctime"; 1953 #endif 1954 error = EINVAL; 1955 } 1956 1957 nmp = VFSTONFS(vp->v_mount); 1958 if (error) { 1959 1960 /* 1961 * despite of the fact that we've updated the file, 1962 * timestamps of the file were not updated as we 1963 * expected. 1964 * it means that the server has incompatible 1965 * semantics of timestamps or (more likely) 1966 * the server time is not precise enough to 1967 * track each modifications. 1968 * in that case, we disable wcc processing. 1969 * 1970 * yes, strictly speaking, we should disable all 1971 * caching. it's a compromise. 1972 */ 1973 1974 simple_lock(&nmp->nm_slock); 1975 #if defined(DEBUG) 1976 if (!NFS_WCCKLUDGE(nmp, now)) { 1977 printf("%s: inaccurate wcc data (%s) detected," 1978 " disabling wcc\n", 1979 vp->v_mount->mnt_stat.f_mntfromname, 1980 reason); 1981 } 1982 #endif 1983 nmp->nm_iflag |= NFSMNT_WCCKLUDGE; 1984 nmp->nm_wcckludgetime = now; 1985 simple_unlock(&nmp->nm_slock); 1986 } else if (NFS_WCCKLUDGE(nmp, now)) { 1987 error = EPERM; /* XXX */ 1988 } else if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1989 simple_lock(&nmp->nm_slock); 1990 if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1991 #if defined(DEBUG) 1992 printf("%s: re-enabling wcc\n", 1993 vp->v_mount->mnt_stat.f_mntfromname); 1994 #endif 1995 nmp->nm_iflag &= ~NFSMNT_WCCKLUDGE; 1996 } 1997 simple_unlock(&nmp->nm_slock); 1998 } 1999 } 2000 2001 #endif /* !defined(NFS_V2_ONLY) */ 2002 2003 return error; 2004 } 2005 2006 /* 2007 * Heuristic to see if the server XDR encodes directory cookies or not. 2008 * it is not supposed to, but a lot of servers may do this. Also, since 2009 * most/all servers will implement V2 as well, it is expected that they 2010 * may return just 32 bits worth of cookie information, so we need to 2011 * find out in which 32 bits this information is available. We do this 2012 * to avoid trouble with emulated binaries that can't handle 64 bit 2013 * directory offsets. 2014 */ 2015 2016 void 2017 nfs_cookieheuristic(vp, flagp, l, cred) 2018 struct vnode *vp; 2019 int *flagp; 2020 struct lwp *l; 2021 kauth_cred_t cred; 2022 { 2023 struct uio auio; 2024 struct iovec aiov; 2025 caddr_t tbuf, cp; 2026 struct dirent *dp; 2027 off_t *cookies = NULL, *cop; 2028 int error, eof, nc, len; 2029 2030 MALLOC(tbuf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 2031 2032 aiov.iov_base = tbuf; 2033 aiov.iov_len = NFS_DIRFRAGSIZ; 2034 auio.uio_iov = &aiov; 2035 auio.uio_iovcnt = 1; 2036 auio.uio_rw = UIO_READ; 2037 auio.uio_resid = NFS_DIRFRAGSIZ; 2038 auio.uio_offset = 0; 2039 UIO_SETUP_SYSSPACE(&auio); 2040 2041 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 2042 2043 len = NFS_DIRFRAGSIZ - auio.uio_resid; 2044 if (error || len == 0) { 2045 FREE(tbuf, M_TEMP); 2046 if (cookies) 2047 free(cookies, M_TEMP); 2048 return; 2049 } 2050 2051 /* 2052 * Find the first valid entry and look at its offset cookie. 2053 */ 2054 2055 cp = tbuf; 2056 for (cop = cookies; len > 0; len -= dp->d_reclen) { 2057 dp = (struct dirent *)cp; 2058 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 2059 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 2060 *flagp |= NFSMNT_SWAPCOOKIE; 2061 nfs_invaldircache(vp, 0); 2062 nfs_vinvalbuf(vp, 0, cred, l, 1); 2063 } 2064 break; 2065 } 2066 cop++; 2067 cp += dp->d_reclen; 2068 } 2069 2070 FREE(tbuf, M_TEMP); 2071 free(cookies, M_TEMP); 2072 } 2073 #endif /* NFS */ 2074 2075 #ifdef NFSSERVER 2076 /* 2077 * Set up nameidata for a lookup() call and do it. 2078 * 2079 * If pubflag is set, this call is done for a lookup operation on the 2080 * public filehandle. In that case we allow crossing mountpoints and 2081 * absolute pathnames. However, the caller is expected to check that 2082 * the lookup result is within the public fs, and deny access if 2083 * it is not. 2084 */ 2085 int 2086 nfs_namei(ndp, nsfh, len, slp, nam, mdp, dposp, retdirp, l, kerbflag, pubflag) 2087 struct nameidata *ndp; 2088 nfsrvfh_t *nsfh; 2089 uint32_t len; 2090 struct nfssvc_sock *slp; 2091 struct mbuf *nam; 2092 struct mbuf **mdp; 2093 caddr_t *dposp; 2094 struct vnode **retdirp; 2095 struct lwp *l; 2096 int kerbflag, pubflag; 2097 { 2098 int i, rem; 2099 struct mbuf *md; 2100 char *fromcp, *tocp, *cp; 2101 struct iovec aiov; 2102 struct uio auio; 2103 struct vnode *dp; 2104 int error, rdonly, linklen; 2105 struct componentname *cnp = &ndp->ni_cnd; 2106 2107 *retdirp = (struct vnode *)0; 2108 2109 if ((len + 1) > MAXPATHLEN) 2110 return (ENAMETOOLONG); 2111 if (len == 0) 2112 return (EACCES); 2113 cnp->cn_pnbuf = PNBUF_GET(); 2114 2115 /* 2116 * Copy the name from the mbuf list to ndp->ni_pnbuf 2117 * and set the various ndp fields appropriately. 2118 */ 2119 fromcp = *dposp; 2120 tocp = cnp->cn_pnbuf; 2121 md = *mdp; 2122 rem = mtod(md, caddr_t) + md->m_len - fromcp; 2123 for (i = 0; i < len; i++) { 2124 while (rem == 0) { 2125 md = md->m_next; 2126 if (md == NULL) { 2127 error = EBADRPC; 2128 goto out; 2129 } 2130 fromcp = mtod(md, caddr_t); 2131 rem = md->m_len; 2132 } 2133 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 2134 error = EACCES; 2135 goto out; 2136 } 2137 *tocp++ = *fromcp++; 2138 rem--; 2139 } 2140 *tocp = '\0'; 2141 *mdp = md; 2142 *dposp = fromcp; 2143 len = nfsm_rndup(len)-len; 2144 if (len > 0) { 2145 if (rem >= len) 2146 *dposp += len; 2147 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 2148 goto out; 2149 } 2150 2151 /* 2152 * Extract and set starting directory. 2153 */ 2154 error = nfsrv_fhtovp(nsfh, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 2155 nam, &rdonly, kerbflag, pubflag); 2156 if (error) 2157 goto out; 2158 if (dp->v_type != VDIR) { 2159 vrele(dp); 2160 error = ENOTDIR; 2161 goto out; 2162 } 2163 2164 if (rdonly) 2165 cnp->cn_flags |= RDONLY; 2166 2167 *retdirp = dp; 2168 2169 if (pubflag) { 2170 /* 2171 * Oh joy. For WebNFS, handle those pesky '%' escapes, 2172 * and the 'native path' indicator. 2173 */ 2174 cp = PNBUF_GET(); 2175 fromcp = cnp->cn_pnbuf; 2176 tocp = cp; 2177 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 2178 switch ((unsigned char)*fromcp) { 2179 case WEBNFS_NATIVE_CHAR: 2180 /* 2181 * 'Native' path for us is the same 2182 * as a path according to the NFS spec, 2183 * just skip the escape char. 2184 */ 2185 fromcp++; 2186 break; 2187 /* 2188 * More may be added in the future, range 0x80-0xff 2189 */ 2190 default: 2191 error = EIO; 2192 PNBUF_PUT(cp); 2193 goto out; 2194 } 2195 } 2196 /* 2197 * Translate the '%' escapes, URL-style. 2198 */ 2199 while (*fromcp != '\0') { 2200 if (*fromcp == WEBNFS_ESC_CHAR) { 2201 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 2202 fromcp++; 2203 *tocp++ = HEXSTRTOI(fromcp); 2204 fromcp += 2; 2205 continue; 2206 } else { 2207 error = ENOENT; 2208 PNBUF_PUT(cp); 2209 goto out; 2210 } 2211 } else 2212 *tocp++ = *fromcp++; 2213 } 2214 *tocp = '\0'; 2215 PNBUF_PUT(cnp->cn_pnbuf); 2216 cnp->cn_pnbuf = cp; 2217 } 2218 2219 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 2220 ndp->ni_segflg = UIO_SYSSPACE; 2221 ndp->ni_rootdir = rootvnode; 2222 2223 if (pubflag) { 2224 ndp->ni_loopcnt = 0; 2225 if (cnp->cn_pnbuf[0] == '/') 2226 dp = rootvnode; 2227 } else { 2228 cnp->cn_flags |= NOCROSSMOUNT; 2229 } 2230 2231 cnp->cn_lwp = l; 2232 VREF(dp); 2233 2234 for (;;) { 2235 cnp->cn_nameptr = cnp->cn_pnbuf; 2236 ndp->ni_startdir = dp; 2237 /* 2238 * And call lookup() to do the real work 2239 */ 2240 error = lookup(ndp); 2241 if (error) { 2242 PNBUF_PUT(cnp->cn_pnbuf); 2243 return (error); 2244 } 2245 /* 2246 * Check for encountering a symbolic link 2247 */ 2248 if ((cnp->cn_flags & ISSYMLINK) == 0) { 2249 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 2250 cnp->cn_flags |= HASBUF; 2251 else 2252 PNBUF_PUT(cnp->cn_pnbuf); 2253 return (0); 2254 } else { 2255 if ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN)) 2256 VOP_UNLOCK(ndp->ni_dvp, 0); 2257 if (!pubflag) { 2258 error = EINVAL; 2259 break; 2260 } 2261 2262 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 2263 error = ELOOP; 2264 break; 2265 } 2266 if (ndp->ni_vp->v_mount->mnt_flag & MNT_SYMPERM) { 2267 error = VOP_ACCESS(ndp->ni_vp, VEXEC, cnp->cn_cred, 2268 cnp->cn_lwp); 2269 if (error != 0) 2270 break; 2271 } 2272 if (ndp->ni_pathlen > 1) 2273 cp = PNBUF_GET(); 2274 else 2275 cp = cnp->cn_pnbuf; 2276 aiov.iov_base = cp; 2277 aiov.iov_len = MAXPATHLEN; 2278 auio.uio_iov = &aiov; 2279 auio.uio_iovcnt = 1; 2280 auio.uio_offset = 0; 2281 auio.uio_rw = UIO_READ; 2282 auio.uio_resid = MAXPATHLEN; 2283 UIO_SETUP_SYSSPACE(&auio); 2284 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 2285 if (error) { 2286 badlink: 2287 if (ndp->ni_pathlen > 1) 2288 PNBUF_PUT(cp); 2289 break; 2290 } 2291 linklen = MAXPATHLEN - auio.uio_resid; 2292 if (linklen == 0) { 2293 error = ENOENT; 2294 goto badlink; 2295 } 2296 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 2297 error = ENAMETOOLONG; 2298 goto badlink; 2299 } 2300 if (ndp->ni_pathlen > 1) { 2301 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 2302 PNBUF_PUT(cnp->cn_pnbuf); 2303 cnp->cn_pnbuf = cp; 2304 } else 2305 cnp->cn_pnbuf[linklen] = '\0'; 2306 ndp->ni_pathlen += linklen; 2307 vput(ndp->ni_vp); 2308 dp = ndp->ni_dvp; 2309 /* 2310 * Check if root directory should replace current directory. 2311 */ 2312 if (cnp->cn_pnbuf[0] == '/') { 2313 vrele(dp); 2314 dp = ndp->ni_rootdir; 2315 VREF(dp); 2316 } 2317 } 2318 } 2319 vrele(ndp->ni_dvp); 2320 vput(ndp->ni_vp); 2321 ndp->ni_vp = NULL; 2322 out: 2323 PNBUF_PUT(cnp->cn_pnbuf); 2324 return (error); 2325 } 2326 #endif /* NFSSERVER */ 2327 2328 /* 2329 * A fiddled version of m_adj() that ensures null fill to a 32-bit 2330 * boundary and only trims off the back end 2331 * 2332 * 1. trim off 'len' bytes as m_adj(mp, -len). 2333 * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 2334 */ 2335 void 2336 nfs_zeropad(mp, len, nul) 2337 struct mbuf *mp; 2338 int len; 2339 int nul; 2340 { 2341 struct mbuf *m; 2342 int count; 2343 2344 /* 2345 * Trim from tail. Scan the mbuf chain, 2346 * calculating its length and finding the last mbuf. 2347 * If the adjustment only affects this mbuf, then just 2348 * adjust and return. Otherwise, rescan and truncate 2349 * after the remaining size. 2350 */ 2351 count = 0; 2352 m = mp; 2353 for (;;) { 2354 count += m->m_len; 2355 if (m->m_next == NULL) 2356 break; 2357 m = m->m_next; 2358 } 2359 2360 KDASSERT(count >= len); 2361 2362 if (m->m_len >= len) { 2363 m->m_len -= len; 2364 } else { 2365 count -= len; 2366 /* 2367 * Correct length for chain is "count". 2368 * Find the mbuf with last data, adjust its length, 2369 * and toss data from remaining mbufs on chain. 2370 */ 2371 for (m = mp; m; m = m->m_next) { 2372 if (m->m_len >= count) { 2373 m->m_len = count; 2374 break; 2375 } 2376 count -= m->m_len; 2377 } 2378 KASSERT(m && m->m_next); 2379 m_freem(m->m_next); 2380 m->m_next = NULL; 2381 } 2382 2383 KDASSERT(m->m_next == NULL); 2384 2385 /* 2386 * zero-padding. 2387 */ 2388 if (nul > 0) { 2389 char *cp; 2390 int i; 2391 2392 if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 2393 struct mbuf *n; 2394 2395 KDASSERT(MLEN >= nul); 2396 n = m_get(M_WAIT, MT_DATA); 2397 MCLAIM(n, &nfs_mowner); 2398 n->m_len = nul; 2399 n->m_next = NULL; 2400 m->m_next = n; 2401 cp = mtod(n, caddr_t); 2402 } else { 2403 cp = mtod(m, caddr_t) + m->m_len; 2404 m->m_len += nul; 2405 } 2406 for (i = 0; i < nul; i++) 2407 *cp++ = '\0'; 2408 } 2409 return; 2410 } 2411 2412 /* 2413 * Make these functions instead of macros, so that the kernel text size 2414 * doesn't get too big... 2415 */ 2416 void 2417 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2418 struct nfsrv_descript *nfsd; 2419 int before_ret; 2420 struct vattr *before_vap; 2421 int after_ret; 2422 struct vattr *after_vap; 2423 struct mbuf **mbp; 2424 char **bposp; 2425 { 2426 struct mbuf *mb = *mbp; 2427 char *bpos = *bposp; 2428 u_int32_t *tl; 2429 2430 if (before_ret) { 2431 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2432 *tl = nfs_false; 2433 } else { 2434 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2435 *tl++ = nfs_true; 2436 txdr_hyper(before_vap->va_size, tl); 2437 tl += 2; 2438 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2439 tl += 2; 2440 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2441 } 2442 *bposp = bpos; 2443 *mbp = mb; 2444 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2445 } 2446 2447 void 2448 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2449 struct nfsrv_descript *nfsd; 2450 int after_ret; 2451 struct vattr *after_vap; 2452 struct mbuf **mbp; 2453 char **bposp; 2454 { 2455 struct mbuf *mb = *mbp; 2456 char *bpos = *bposp; 2457 u_int32_t *tl; 2458 struct nfs_fattr *fp; 2459 2460 if (after_ret) { 2461 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2462 *tl = nfs_false; 2463 } else { 2464 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2465 *tl++ = nfs_true; 2466 fp = (struct nfs_fattr *)tl; 2467 nfsm_srvfattr(nfsd, after_vap, fp); 2468 } 2469 *mbp = mb; 2470 *bposp = bpos; 2471 } 2472 2473 void 2474 nfsm_srvfattr(nfsd, vap, fp) 2475 struct nfsrv_descript *nfsd; 2476 struct vattr *vap; 2477 struct nfs_fattr *fp; 2478 { 2479 2480 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2481 fp->fa_uid = txdr_unsigned(vap->va_uid); 2482 fp->fa_gid = txdr_unsigned(vap->va_gid); 2483 if (nfsd->nd_flag & ND_NFSV3) { 2484 fp->fa_type = vtonfsv3_type(vap->va_type); 2485 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2486 txdr_hyper(vap->va_size, &fp->fa3_size); 2487 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2488 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2489 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2490 fp->fa3_fsid.nfsuquad[0] = 0; 2491 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2492 txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 2493 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2494 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2495 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2496 } else { 2497 fp->fa_type = vtonfsv2_type(vap->va_type); 2498 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2499 fp->fa2_size = txdr_unsigned(vap->va_size); 2500 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2501 if (vap->va_type == VFIFO) 2502 fp->fa2_rdev = 0xffffffff; 2503 else 2504 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2505 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2506 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2507 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2508 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2509 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2510 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2511 } 2512 } 2513 2514 #ifdef NFSSERVER 2515 /* 2516 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2517 * - look up fsid in mount list (if not found ret error) 2518 * - get vp and export rights by calling VFS_FHTOVP() 2519 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2520 * - if not lockflag unlock it with VOP_UNLOCK() 2521 */ 2522 int 2523 nfsrv_fhtovp(nfsrvfh_t *nsfh, int lockflag, struct vnode **vpp, 2524 kauth_cred_t cred, struct nfssvc_sock *slp, struct mbuf *nam, int *rdonlyp, 2525 int kerbflag, int pubflag) 2526 { 2527 struct mount *mp; 2528 kauth_cred_t credanon; 2529 int error, exflags; 2530 struct sockaddr_in *saddr; 2531 fhandle_t *fhp; 2532 2533 fhp = NFSRVFH_FHANDLE(nsfh); 2534 *vpp = (struct vnode *)0; 2535 2536 if (nfs_ispublicfh(nsfh)) { 2537 if (!pubflag || !nfs_pub.np_valid) 2538 return (ESTALE); 2539 fhp = nfs_pub.np_handle; 2540 } 2541 2542 error = netexport_check(&fhp->fh_fsid, nam, &mp, &exflags, &credanon); 2543 if (error) { 2544 return error; 2545 } 2546 2547 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2548 if (error) 2549 return (error); 2550 2551 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2552 saddr = mtod(nam, struct sockaddr_in *); 2553 if ((saddr->sin_family == AF_INET) && 2554 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2555 vput(*vpp); 2556 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2557 } 2558 #ifdef INET6 2559 if ((saddr->sin_family == AF_INET6) && 2560 ntohs(saddr->sin_port) >= IPV6PORT_RESERVED) { 2561 vput(*vpp); 2562 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2563 } 2564 #endif 2565 } 2566 /* 2567 * Check/setup credentials. 2568 */ 2569 if (exflags & MNT_EXKERB) { 2570 if (!kerbflag) { 2571 vput(*vpp); 2572 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2573 } 2574 } else if (kerbflag) { 2575 vput(*vpp); 2576 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2577 } else if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 2578 NULL) == 0 || (exflags & MNT_EXPORTANON)) { 2579 kauth_cred_clone(credanon, cred); 2580 } 2581 if (exflags & MNT_EXRDONLY) 2582 *rdonlyp = 1; 2583 else 2584 *rdonlyp = 0; 2585 if (!lockflag) 2586 VOP_UNLOCK(*vpp, 0); 2587 return (0); 2588 } 2589 2590 /* 2591 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2592 * means a length of 0, for v2 it means all zeroes. 2593 */ 2594 int 2595 nfs_ispublicfh(const nfsrvfh_t *nsfh) 2596 { 2597 const char *cp = (const void *)(NFSRVFH_DATA(nsfh)); 2598 int i; 2599 2600 if (NFSRVFH_SIZE(nsfh) == 0) { 2601 return TRUE; 2602 } 2603 if (NFSRVFH_SIZE(nsfh) != NFSX_V2FH) { 2604 return FALSE; 2605 } 2606 for (i = 0; i < NFSX_V2FH; i++) 2607 if (*cp++ != 0) 2608 return FALSE; 2609 return TRUE; 2610 } 2611 #endif /* NFSSERVER */ 2612 2613 /* 2614 * This function compares two net addresses by family and returns TRUE 2615 * if they are the same host. 2616 * If there is any doubt, return FALSE. 2617 * The AF_INET family is handled as a special case so that address mbufs 2618 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2619 */ 2620 int 2621 netaddr_match(family, haddr, nam) 2622 int family; 2623 union nethostaddr *haddr; 2624 struct mbuf *nam; 2625 { 2626 struct sockaddr_in *inetaddr; 2627 2628 switch (family) { 2629 case AF_INET: 2630 inetaddr = mtod(nam, struct sockaddr_in *); 2631 if (inetaddr->sin_family == AF_INET && 2632 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2633 return (1); 2634 break; 2635 #ifdef INET6 2636 case AF_INET6: 2637 { 2638 struct sockaddr_in6 *sin6_1, *sin6_2; 2639 2640 sin6_1 = mtod(nam, struct sockaddr_in6 *); 2641 sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 2642 if (sin6_1->sin6_family == AF_INET6 && 2643 IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 2644 return 1; 2645 } 2646 #endif 2647 #ifdef ISO 2648 case AF_ISO: 2649 { 2650 struct sockaddr_iso *isoaddr1, *isoaddr2; 2651 2652 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2653 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2654 if (isoaddr1->siso_family == AF_ISO && 2655 isoaddr1->siso_nlen > 0 && 2656 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2657 SAME_ISOADDR(isoaddr1, isoaddr2)) 2658 return (1); 2659 break; 2660 } 2661 #endif /* ISO */ 2662 default: 2663 break; 2664 }; 2665 return (0); 2666 } 2667 2668 /* 2669 * The write verifier has changed (probably due to a server reboot), so all 2670 * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 2671 * as dirty or are being written out just now, all this takes is clearing 2672 * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 2673 * the mount point. 2674 */ 2675 void 2676 nfs_clearcommit(mp) 2677 struct mount *mp; 2678 { 2679 struct vnode *vp; 2680 struct nfsnode *np; 2681 struct vm_page *pg; 2682 struct nfsmount *nmp = VFSTONFS(mp); 2683 2684 lockmgr(&nmp->nm_writeverflock, LK_EXCLUSIVE, NULL); 2685 2686 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 2687 KASSERT(vp->v_mount == mp); 2688 if (vp->v_type != VREG) 2689 continue; 2690 np = VTONFS(vp); 2691 np->n_pushlo = np->n_pushhi = np->n_pushedlo = 2692 np->n_pushedhi = 0; 2693 np->n_commitflags &= 2694 ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 2695 simple_lock(&vp->v_uobj.vmobjlock); 2696 TAILQ_FOREACH(pg, &vp->v_uobj.memq, listq) { 2697 pg->flags &= ~PG_NEEDCOMMIT; 2698 } 2699 simple_unlock(&vp->v_uobj.vmobjlock); 2700 } 2701 simple_lock(&nmp->nm_slock); 2702 nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 2703 simple_unlock(&nmp->nm_slock); 2704 lockmgr(&nmp->nm_writeverflock, LK_RELEASE, NULL); 2705 } 2706 2707 void 2708 nfs_merge_commit_ranges(vp) 2709 struct vnode *vp; 2710 { 2711 struct nfsnode *np = VTONFS(vp); 2712 2713 KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 2714 2715 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2716 np->n_pushedlo = np->n_pushlo; 2717 np->n_pushedhi = np->n_pushhi; 2718 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2719 } else { 2720 if (np->n_pushlo < np->n_pushedlo) 2721 np->n_pushedlo = np->n_pushlo; 2722 if (np->n_pushhi > np->n_pushedhi) 2723 np->n_pushedhi = np->n_pushhi; 2724 } 2725 2726 np->n_pushlo = np->n_pushhi = 0; 2727 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 2728 2729 #ifdef NFS_DEBUG_COMMIT 2730 printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2731 (unsigned)np->n_pushedhi); 2732 #endif 2733 } 2734 2735 int 2736 nfs_in_committed_range(vp, off, len) 2737 struct vnode *vp; 2738 off_t off, len; 2739 { 2740 struct nfsnode *np = VTONFS(vp); 2741 off_t lo, hi; 2742 2743 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2744 return 0; 2745 lo = off; 2746 hi = lo + len; 2747 2748 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 2749 } 2750 2751 int 2752 nfs_in_tobecommitted_range(vp, off, len) 2753 struct vnode *vp; 2754 off_t off, len; 2755 { 2756 struct nfsnode *np = VTONFS(vp); 2757 off_t lo, hi; 2758 2759 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2760 return 0; 2761 lo = off; 2762 hi = lo + len; 2763 2764 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 2765 } 2766 2767 void 2768 nfs_add_committed_range(vp, off, len) 2769 struct vnode *vp; 2770 off_t off, len; 2771 { 2772 struct nfsnode *np = VTONFS(vp); 2773 off_t lo, hi; 2774 2775 lo = off; 2776 hi = lo + len; 2777 2778 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2779 np->n_pushedlo = lo; 2780 np->n_pushedhi = hi; 2781 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2782 } else { 2783 if (hi > np->n_pushedhi) 2784 np->n_pushedhi = hi; 2785 if (lo < np->n_pushedlo) 2786 np->n_pushedlo = lo; 2787 } 2788 #ifdef NFS_DEBUG_COMMIT 2789 printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2790 (unsigned)np->n_pushedhi); 2791 #endif 2792 } 2793 2794 void 2795 nfs_del_committed_range(vp, off, len) 2796 struct vnode *vp; 2797 off_t off, len; 2798 { 2799 struct nfsnode *np = VTONFS(vp); 2800 off_t lo, hi; 2801 2802 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2803 return; 2804 2805 lo = off; 2806 hi = lo + len; 2807 2808 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 2809 return; 2810 if (lo <= np->n_pushedlo) 2811 np->n_pushedlo = hi; 2812 else if (hi >= np->n_pushedhi) 2813 np->n_pushedhi = lo; 2814 else { 2815 /* 2816 * XXX There's only one range. If the deleted range 2817 * is in the middle, pick the largest of the 2818 * contiguous ranges that it leaves. 2819 */ 2820 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 2821 np->n_pushedhi = lo; 2822 else 2823 np->n_pushedlo = hi; 2824 } 2825 #ifdef NFS_DEBUG_COMMIT 2826 printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2827 (unsigned)np->n_pushedhi); 2828 #endif 2829 } 2830 2831 void 2832 nfs_add_tobecommitted_range(vp, off, len) 2833 struct vnode *vp; 2834 off_t off, len; 2835 { 2836 struct nfsnode *np = VTONFS(vp); 2837 off_t lo, hi; 2838 2839 lo = off; 2840 hi = lo + len; 2841 2842 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 2843 np->n_pushlo = lo; 2844 np->n_pushhi = hi; 2845 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 2846 } else { 2847 if (lo < np->n_pushlo) 2848 np->n_pushlo = lo; 2849 if (hi > np->n_pushhi) 2850 np->n_pushhi = hi; 2851 } 2852 #ifdef NFS_DEBUG_COMMIT 2853 printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2854 (unsigned)np->n_pushhi); 2855 #endif 2856 } 2857 2858 void 2859 nfs_del_tobecommitted_range(vp, off, len) 2860 struct vnode *vp; 2861 off_t off, len; 2862 { 2863 struct nfsnode *np = VTONFS(vp); 2864 off_t lo, hi; 2865 2866 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2867 return; 2868 2869 lo = off; 2870 hi = lo + len; 2871 2872 if (lo > np->n_pushhi || hi < np->n_pushlo) 2873 return; 2874 2875 if (lo <= np->n_pushlo) 2876 np->n_pushlo = hi; 2877 else if (hi >= np->n_pushhi) 2878 np->n_pushhi = lo; 2879 else { 2880 /* 2881 * XXX There's only one range. If the deleted range 2882 * is in the middle, pick the largest of the 2883 * contiguous ranges that it leaves. 2884 */ 2885 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 2886 np->n_pushhi = lo; 2887 else 2888 np->n_pushlo = hi; 2889 } 2890 #ifdef NFS_DEBUG_COMMIT 2891 printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2892 (unsigned)np->n_pushhi); 2893 #endif 2894 } 2895 2896 /* 2897 * Map errnos to NFS error numbers. For Version 3 also filter out error 2898 * numbers not specified for the associated procedure. 2899 */ 2900 int 2901 nfsrv_errmap(nd, err) 2902 struct nfsrv_descript *nd; 2903 int err; 2904 { 2905 const short *defaulterrp, *errp; 2906 2907 if (nd->nd_flag & ND_NFSV3) { 2908 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2909 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2910 while (*++errp) { 2911 if (*errp == err) 2912 return (err); 2913 else if (*errp > err) 2914 break; 2915 } 2916 return ((int)*defaulterrp); 2917 } else 2918 return (err & 0xffff); 2919 } 2920 if (err <= ELAST) 2921 return ((int)nfsrv_v2errmap[err - 1]); 2922 return (NFSERR_IO); 2923 } 2924 2925 u_int32_t 2926 nfs_getxid() 2927 { 2928 static u_int32_t base; 2929 static u_int32_t nfs_xid = 0; 2930 static struct simplelock nfs_xidlock = SIMPLELOCK_INITIALIZER; 2931 u_int32_t newxid; 2932 2933 simple_lock(&nfs_xidlock); 2934 /* 2935 * derive initial xid from system time 2936 * XXX time is invalid if root not yet mounted 2937 */ 2938 if (__predict_false(!base && (rootvp))) { 2939 struct timeval tv; 2940 2941 microtime(&tv); 2942 base = tv.tv_sec << 12; 2943 nfs_xid = base; 2944 } 2945 2946 /* 2947 * Skip zero xid if it should ever happen. 2948 */ 2949 if (__predict_false(++nfs_xid == 0)) 2950 nfs_xid++; 2951 newxid = nfs_xid; 2952 simple_unlock(&nfs_xidlock); 2953 2954 return txdr_unsigned(newxid); 2955 } 2956 2957 /* 2958 * assign a new xid for existing request. 2959 * used for NFSERR_JUKEBOX handling. 2960 */ 2961 void 2962 nfs_renewxid(struct nfsreq *req) 2963 { 2964 u_int32_t xid; 2965 int off; 2966 2967 xid = nfs_getxid(); 2968 if (req->r_nmp->nm_sotype == SOCK_STREAM) 2969 off = sizeof(u_int32_t); /* RPC record mark */ 2970 else 2971 off = 0; 2972 2973 m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2974 req->r_xid = xid; 2975 } 2976 2977 #if defined(NFSSERVER) 2978 int 2979 nfsrv_composefh(struct vnode *vp, nfsrvfh_t *nsfh, boolean_t v3) 2980 { 2981 int error; 2982 size_t fhsize; 2983 2984 fhsize = NFSD_MAXFHSIZE; 2985 error = vfs_composefh(vp, (void *)NFSRVFH_DATA(nsfh), &fhsize); 2986 if (NFSX_FHTOOBIG_P(fhsize, v3)) { 2987 error = EOPNOTSUPP; 2988 } 2989 if (error != 0) { 2990 return error; 2991 } 2992 if (!v3 && fhsize < NFSX_V2FH) { 2993 memset((char *)NFSRVFH_DATA(nsfh) + fhsize, 0, 2994 NFSX_V2FH - fhsize); 2995 fhsize = NFSX_V2FH; 2996 } 2997 if ((fhsize % NFSX_UNSIGNED) != 0) { 2998 return EOPNOTSUPP; 2999 } 3000 nsfh->nsfh_size = fhsize; 3001 return 0; 3002 } 3003 3004 int 3005 nfsrv_comparefh(const nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 3006 { 3007 3008 if (NFSRVFH_SIZE(fh1) != NFSRVFH_SIZE(fh2)) { 3009 return NFSRVFH_SIZE(fh2) - NFSRVFH_SIZE(fh1); 3010 } 3011 return memcmp(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), NFSRVFH_SIZE(fh1)); 3012 } 3013 3014 void 3015 nfsrv_copyfh(nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 3016 { 3017 size_t size; 3018 3019 fh1->nsfh_size = size = NFSRVFH_SIZE(fh2); 3020 memcpy(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), size); 3021 } 3022 #endif /* defined(NFSSERVER) */ 3023
Indexes created Wed Sep 24 02:09:48 GMT 2025