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sys/nfs/nfs_subs.c
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1 /* $NetBSD: nfs_subs.c,v 1.209 2008/10/22 12:29:35 matt 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 1.209 2008/10/22 12:29:35 matt 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/kmem.h> 91 #include <sys/mount.h> 92 #include <sys/vnode.h> 93 #include <sys/namei.h> 94 #include <sys/mbuf.h> 95 #include <sys/socket.h> 96 #include <sys/stat.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 #include <sys/atomic.h> 103 104 #include <uvm/uvm_extern.h> 105 106 #include <nfs/rpcv2.h> 107 #include <nfs/nfsproto.h> 108 #include <nfs/nfsnode.h> 109 #include <nfs/nfs.h> 110 #include <nfs/xdr_subs.h> 111 #include <nfs/nfsm_subs.h> 112 #include <nfs/nfsmount.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 static u_int32_t nfs_xid; 124 125 /* 126 * Data items converted to xdr at startup, since they are constant 127 * This is kinda hokey, but may save a little time doing byte swaps 128 */ 129 u_int32_t nfs_xdrneg1; 130 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 131 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 132 rpc_auth_kerb; 133 u_int32_t nfs_prog, nfs_true, nfs_false; 134 135 /* And other global data */ 136 const nfstype nfsv2_type[9] = 137 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, NFCHR, NFNON }; 138 const nfstype nfsv3_type[9] = 139 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON }; 140 const enum vtype nv2tov_type[8] = 141 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 142 const enum vtype nv3tov_type[8] = 143 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 144 int nfs_ticks; 145 int nfs_commitsize; 146 147 MALLOC_DEFINE(M_NFSDIROFF, "NFS diroff", "NFS directory cookies"); 148 149 /* NFS client/server stats. */ 150 struct nfsstats nfsstats; 151 152 /* 153 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 154 */ 155 const int nfsv3_procid[NFS_NPROCS] = { 156 NFSPROC_NULL, 157 NFSPROC_GETATTR, 158 NFSPROC_SETATTR, 159 NFSPROC_NOOP, 160 NFSPROC_LOOKUP, 161 NFSPROC_READLINK, 162 NFSPROC_READ, 163 NFSPROC_NOOP, 164 NFSPROC_WRITE, 165 NFSPROC_CREATE, 166 NFSPROC_REMOVE, 167 NFSPROC_RENAME, 168 NFSPROC_LINK, 169 NFSPROC_SYMLINK, 170 NFSPROC_MKDIR, 171 NFSPROC_RMDIR, 172 NFSPROC_READDIR, 173 NFSPROC_FSSTAT, 174 NFSPROC_NOOP, 175 NFSPROC_NOOP, 176 NFSPROC_NOOP, 177 NFSPROC_NOOP, 178 NFSPROC_NOOP 179 }; 180 181 /* 182 * and the reverse mapping from generic to Version 2 procedure numbers 183 */ 184 const int nfsv2_procid[NFS_NPROCS] = { 185 NFSV2PROC_NULL, 186 NFSV2PROC_GETATTR, 187 NFSV2PROC_SETATTR, 188 NFSV2PROC_LOOKUP, 189 NFSV2PROC_NOOP, 190 NFSV2PROC_READLINK, 191 NFSV2PROC_READ, 192 NFSV2PROC_WRITE, 193 NFSV2PROC_CREATE, 194 NFSV2PROC_MKDIR, 195 NFSV2PROC_SYMLINK, 196 NFSV2PROC_CREATE, 197 NFSV2PROC_REMOVE, 198 NFSV2PROC_RMDIR, 199 NFSV2PROC_RENAME, 200 NFSV2PROC_LINK, 201 NFSV2PROC_READDIR, 202 NFSV2PROC_NOOP, 203 NFSV2PROC_STATFS, 204 NFSV2PROC_NOOP, 205 NFSV2PROC_NOOP, 206 NFSV2PROC_NOOP, 207 NFSV2PROC_NOOP, 208 }; 209 210 /* 211 * Maps errno values to nfs error numbers. 212 * Use NFSERR_IO as the catch all for ones not specifically defined in 213 * RFC 1094. 214 */ 215 static const u_char nfsrv_v2errmap[ELAST] = { 216 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 217 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 218 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 219 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 220 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 221 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 222 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 223 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 224 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 225 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 229 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 233 }; 234 235 /* 236 * Maps errno values to nfs error numbers. 237 * Although it is not obvious whether or not NFS clients really care if 238 * a returned error value is in the specified list for the procedure, the 239 * safest thing to do is filter them appropriately. For Version 2, the 240 * X/Open XNFS document is the only specification that defines error values 241 * for each RPC (The RFC simply lists all possible error values for all RPCs), 242 * so I have decided to not do this for Version 2. 243 * The first entry is the default error return and the rest are the valid 244 * errors for that RPC in increasing numeric order. 245 */ 246 static const short nfsv3err_null[] = { 247 0, 248 0, 249 }; 250 251 static const short nfsv3err_getattr[] = { 252 NFSERR_IO, 253 NFSERR_IO, 254 NFSERR_STALE, 255 NFSERR_BADHANDLE, 256 NFSERR_SERVERFAULT, 257 0, 258 }; 259 260 static const short nfsv3err_setattr[] = { 261 NFSERR_IO, 262 NFSERR_PERM, 263 NFSERR_IO, 264 NFSERR_ACCES, 265 NFSERR_INVAL, 266 NFSERR_NOSPC, 267 NFSERR_ROFS, 268 NFSERR_DQUOT, 269 NFSERR_STALE, 270 NFSERR_BADHANDLE, 271 NFSERR_NOT_SYNC, 272 NFSERR_SERVERFAULT, 273 0, 274 }; 275 276 static const short nfsv3err_lookup[] = { 277 NFSERR_IO, 278 NFSERR_NOENT, 279 NFSERR_IO, 280 NFSERR_ACCES, 281 NFSERR_NOTDIR, 282 NFSERR_NAMETOL, 283 NFSERR_STALE, 284 NFSERR_BADHANDLE, 285 NFSERR_SERVERFAULT, 286 0, 287 }; 288 289 static const short nfsv3err_access[] = { 290 NFSERR_IO, 291 NFSERR_IO, 292 NFSERR_STALE, 293 NFSERR_BADHANDLE, 294 NFSERR_SERVERFAULT, 295 0, 296 }; 297 298 static const short nfsv3err_readlink[] = { 299 NFSERR_IO, 300 NFSERR_IO, 301 NFSERR_ACCES, 302 NFSERR_INVAL, 303 NFSERR_STALE, 304 NFSERR_BADHANDLE, 305 NFSERR_NOTSUPP, 306 NFSERR_SERVERFAULT, 307 0, 308 }; 309 310 static const short nfsv3err_read[] = { 311 NFSERR_IO, 312 NFSERR_IO, 313 NFSERR_NXIO, 314 NFSERR_ACCES, 315 NFSERR_INVAL, 316 NFSERR_STALE, 317 NFSERR_BADHANDLE, 318 NFSERR_SERVERFAULT, 319 NFSERR_JUKEBOX, 320 0, 321 }; 322 323 static const short nfsv3err_write[] = { 324 NFSERR_IO, 325 NFSERR_IO, 326 NFSERR_ACCES, 327 NFSERR_INVAL, 328 NFSERR_FBIG, 329 NFSERR_NOSPC, 330 NFSERR_ROFS, 331 NFSERR_DQUOT, 332 NFSERR_STALE, 333 NFSERR_BADHANDLE, 334 NFSERR_SERVERFAULT, 335 NFSERR_JUKEBOX, 336 0, 337 }; 338 339 static const short nfsv3err_create[] = { 340 NFSERR_IO, 341 NFSERR_IO, 342 NFSERR_ACCES, 343 NFSERR_EXIST, 344 NFSERR_NOTDIR, 345 NFSERR_NOSPC, 346 NFSERR_ROFS, 347 NFSERR_NAMETOL, 348 NFSERR_DQUOT, 349 NFSERR_STALE, 350 NFSERR_BADHANDLE, 351 NFSERR_NOTSUPP, 352 NFSERR_SERVERFAULT, 353 0, 354 }; 355 356 static const short nfsv3err_mkdir[] = { 357 NFSERR_IO, 358 NFSERR_IO, 359 NFSERR_ACCES, 360 NFSERR_EXIST, 361 NFSERR_NOTDIR, 362 NFSERR_NOSPC, 363 NFSERR_ROFS, 364 NFSERR_NAMETOL, 365 NFSERR_DQUOT, 366 NFSERR_STALE, 367 NFSERR_BADHANDLE, 368 NFSERR_NOTSUPP, 369 NFSERR_SERVERFAULT, 370 0, 371 }; 372 373 static const short nfsv3err_symlink[] = { 374 NFSERR_IO, 375 NFSERR_IO, 376 NFSERR_ACCES, 377 NFSERR_EXIST, 378 NFSERR_NOTDIR, 379 NFSERR_NOSPC, 380 NFSERR_ROFS, 381 NFSERR_NAMETOL, 382 NFSERR_DQUOT, 383 NFSERR_STALE, 384 NFSERR_BADHANDLE, 385 NFSERR_NOTSUPP, 386 NFSERR_SERVERFAULT, 387 0, 388 }; 389 390 static const short nfsv3err_mknod[] = { 391 NFSERR_IO, 392 NFSERR_IO, 393 NFSERR_ACCES, 394 NFSERR_EXIST, 395 NFSERR_NOTDIR, 396 NFSERR_NOSPC, 397 NFSERR_ROFS, 398 NFSERR_NAMETOL, 399 NFSERR_DQUOT, 400 NFSERR_STALE, 401 NFSERR_BADHANDLE, 402 NFSERR_NOTSUPP, 403 NFSERR_SERVERFAULT, 404 NFSERR_BADTYPE, 405 0, 406 }; 407 408 static const short nfsv3err_remove[] = { 409 NFSERR_IO, 410 NFSERR_NOENT, 411 NFSERR_IO, 412 NFSERR_ACCES, 413 NFSERR_NOTDIR, 414 NFSERR_ROFS, 415 NFSERR_NAMETOL, 416 NFSERR_STALE, 417 NFSERR_BADHANDLE, 418 NFSERR_SERVERFAULT, 419 0, 420 }; 421 422 static const short nfsv3err_rmdir[] = { 423 NFSERR_IO, 424 NFSERR_NOENT, 425 NFSERR_IO, 426 NFSERR_ACCES, 427 NFSERR_EXIST, 428 NFSERR_NOTDIR, 429 NFSERR_INVAL, 430 NFSERR_ROFS, 431 NFSERR_NAMETOL, 432 NFSERR_NOTEMPTY, 433 NFSERR_STALE, 434 NFSERR_BADHANDLE, 435 NFSERR_NOTSUPP, 436 NFSERR_SERVERFAULT, 437 0, 438 }; 439 440 static const short nfsv3err_rename[] = { 441 NFSERR_IO, 442 NFSERR_NOENT, 443 NFSERR_IO, 444 NFSERR_ACCES, 445 NFSERR_EXIST, 446 NFSERR_XDEV, 447 NFSERR_NOTDIR, 448 NFSERR_ISDIR, 449 NFSERR_INVAL, 450 NFSERR_NOSPC, 451 NFSERR_ROFS, 452 NFSERR_MLINK, 453 NFSERR_NAMETOL, 454 NFSERR_NOTEMPTY, 455 NFSERR_DQUOT, 456 NFSERR_STALE, 457 NFSERR_BADHANDLE, 458 NFSERR_NOTSUPP, 459 NFSERR_SERVERFAULT, 460 0, 461 }; 462 463 static const short nfsv3err_link[] = { 464 NFSERR_IO, 465 NFSERR_IO, 466 NFSERR_ACCES, 467 NFSERR_EXIST, 468 NFSERR_XDEV, 469 NFSERR_NOTDIR, 470 NFSERR_INVAL, 471 NFSERR_NOSPC, 472 NFSERR_ROFS, 473 NFSERR_MLINK, 474 NFSERR_NAMETOL, 475 NFSERR_DQUOT, 476 NFSERR_STALE, 477 NFSERR_BADHANDLE, 478 NFSERR_NOTSUPP, 479 NFSERR_SERVERFAULT, 480 0, 481 }; 482 483 static const short nfsv3err_readdir[] = { 484 NFSERR_IO, 485 NFSERR_IO, 486 NFSERR_ACCES, 487 NFSERR_NOTDIR, 488 NFSERR_STALE, 489 NFSERR_BADHANDLE, 490 NFSERR_BAD_COOKIE, 491 NFSERR_TOOSMALL, 492 NFSERR_SERVERFAULT, 493 0, 494 }; 495 496 static const short nfsv3err_readdirplus[] = { 497 NFSERR_IO, 498 NFSERR_IO, 499 NFSERR_ACCES, 500 NFSERR_NOTDIR, 501 NFSERR_STALE, 502 NFSERR_BADHANDLE, 503 NFSERR_BAD_COOKIE, 504 NFSERR_NOTSUPP, 505 NFSERR_TOOSMALL, 506 NFSERR_SERVERFAULT, 507 0, 508 }; 509 510 static const short nfsv3err_fsstat[] = { 511 NFSERR_IO, 512 NFSERR_IO, 513 NFSERR_STALE, 514 NFSERR_BADHANDLE, 515 NFSERR_SERVERFAULT, 516 0, 517 }; 518 519 static const short nfsv3err_fsinfo[] = { 520 NFSERR_STALE, 521 NFSERR_STALE, 522 NFSERR_BADHANDLE, 523 NFSERR_SERVERFAULT, 524 0, 525 }; 526 527 static const short nfsv3err_pathconf[] = { 528 NFSERR_STALE, 529 NFSERR_STALE, 530 NFSERR_BADHANDLE, 531 NFSERR_SERVERFAULT, 532 0, 533 }; 534 535 static const short nfsv3err_commit[] = { 536 NFSERR_IO, 537 NFSERR_IO, 538 NFSERR_STALE, 539 NFSERR_BADHANDLE, 540 NFSERR_SERVERFAULT, 541 0, 542 }; 543 544 static const short * const nfsrv_v3errmap[] = { 545 nfsv3err_null, 546 nfsv3err_getattr, 547 nfsv3err_setattr, 548 nfsv3err_lookup, 549 nfsv3err_access, 550 nfsv3err_readlink, 551 nfsv3err_read, 552 nfsv3err_write, 553 nfsv3err_create, 554 nfsv3err_mkdir, 555 nfsv3err_symlink, 556 nfsv3err_mknod, 557 nfsv3err_remove, 558 nfsv3err_rmdir, 559 nfsv3err_rename, 560 nfsv3err_link, 561 nfsv3err_readdir, 562 nfsv3err_readdirplus, 563 nfsv3err_fsstat, 564 nfsv3err_fsinfo, 565 nfsv3err_pathconf, 566 nfsv3err_commit, 567 }; 568 569 extern struct vfs_hooks nfs_export_hooks; 570 extern struct nfsrtt nfsrtt; 571 572 u_long nfsdirhashmask; 573 574 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 575 576 /* 577 * Create the header for an rpc request packet 578 * The hsiz is the size of the rest of the nfs request header. 579 * (just used to decide if a cluster is a good idea) 580 */ 581 struct mbuf * 582 nfsm_reqh(struct nfsnode *np, u_long procid, int hsiz, char **bposp) 583 { 584 struct mbuf *mb; 585 char *bpos; 586 587 mb = m_get(M_WAIT, MT_DATA); 588 MCLAIM(mb, &nfs_mowner); 589 if (hsiz >= MINCLSIZE) 590 m_clget(mb, M_WAIT); 591 mb->m_len = 0; 592 bpos = mtod(mb, void *); 593 594 /* Finally, return values */ 595 *bposp = bpos; 596 return (mb); 597 } 598 599 /* 600 * Build the RPC header and fill in the authorization info. 601 * The authorization string argument is only used when the credentials 602 * come from outside of the kernel. 603 * Returns the head of the mbuf list. 604 */ 605 struct mbuf * 606 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 607 verf_str, mrest, mrest_len, mbp, xidp) 608 kauth_cred_t cr; 609 int nmflag; 610 int procid; 611 int auth_type; 612 int auth_len; 613 char *auth_str; 614 int verf_len; 615 char *verf_str; 616 struct mbuf *mrest; 617 int mrest_len; 618 struct mbuf **mbp; 619 u_int32_t *xidp; 620 { 621 struct mbuf *mb; 622 u_int32_t *tl; 623 char *bpos; 624 int i; 625 struct mbuf *mreq; 626 int siz, grpsiz, authsiz; 627 628 authsiz = nfsm_rndup(auth_len); 629 mb = m_gethdr(M_WAIT, MT_DATA); 630 MCLAIM(mb, &nfs_mowner); 631 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 632 m_clget(mb, M_WAIT); 633 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 634 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 635 } else { 636 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 637 } 638 mb->m_len = 0; 639 mreq = mb; 640 bpos = mtod(mb, void *); 641 642 /* 643 * First the RPC header. 644 */ 645 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 646 647 *tl++ = *xidp = nfs_getxid(); 648 *tl++ = rpc_call; 649 *tl++ = rpc_vers; 650 *tl++ = txdr_unsigned(NFS_PROG); 651 if (nmflag & NFSMNT_NFSV3) 652 *tl++ = txdr_unsigned(NFS_VER3); 653 else 654 *tl++ = txdr_unsigned(NFS_VER2); 655 if (nmflag & NFSMNT_NFSV3) 656 *tl++ = txdr_unsigned(procid); 657 else 658 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 659 660 /* 661 * And then the authorization cred. 662 */ 663 *tl++ = txdr_unsigned(auth_type); 664 *tl = txdr_unsigned(authsiz); 665 switch (auth_type) { 666 case RPCAUTH_UNIX: 667 nfsm_build(tl, u_int32_t *, auth_len); 668 *tl++ = 0; /* stamp ?? */ 669 *tl++ = 0; /* NULL hostname */ 670 *tl++ = txdr_unsigned(kauth_cred_geteuid(cr)); 671 *tl++ = txdr_unsigned(kauth_cred_getegid(cr)); 672 grpsiz = (auth_len >> 2) - 5; 673 *tl++ = txdr_unsigned(grpsiz); 674 for (i = 0; i < grpsiz; i++) 675 *tl++ = txdr_unsigned(kauth_cred_group(cr, i)); /* XXX elad review */ 676 break; 677 case RPCAUTH_KERB4: 678 siz = auth_len; 679 while (siz > 0) { 680 if (M_TRAILINGSPACE(mb) == 0) { 681 struct mbuf *mb2; 682 mb2 = m_get(M_WAIT, MT_DATA); 683 MCLAIM(mb2, &nfs_mowner); 684 if (siz >= MINCLSIZE) 685 m_clget(mb2, M_WAIT); 686 mb->m_next = mb2; 687 mb = mb2; 688 mb->m_len = 0; 689 bpos = mtod(mb, void *); 690 } 691 i = min(siz, M_TRAILINGSPACE(mb)); 692 memcpy(bpos, auth_str, i); 693 mb->m_len += i; 694 auth_str += i; 695 bpos += i; 696 siz -= i; 697 } 698 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 699 for (i = 0; i < siz; i++) 700 *bpos++ = '\0'; 701 mb->m_len += siz; 702 } 703 break; 704 }; 705 706 /* 707 * And the verifier... 708 */ 709 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 710 if (verf_str) { 711 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 712 *tl = txdr_unsigned(verf_len); 713 siz = verf_len; 714 while (siz > 0) { 715 if (M_TRAILINGSPACE(mb) == 0) { 716 struct mbuf *mb2; 717 mb2 = m_get(M_WAIT, MT_DATA); 718 MCLAIM(mb2, &nfs_mowner); 719 if (siz >= MINCLSIZE) 720 m_clget(mb2, M_WAIT); 721 mb->m_next = mb2; 722 mb = mb2; 723 mb->m_len = 0; 724 bpos = mtod(mb, void *); 725 } 726 i = min(siz, M_TRAILINGSPACE(mb)); 727 memcpy(bpos, verf_str, i); 728 mb->m_len += i; 729 verf_str += i; 730 bpos += i; 731 siz -= i; 732 } 733 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 734 for (i = 0; i < siz; i++) 735 *bpos++ = '\0'; 736 mb->m_len += siz; 737 } 738 } else { 739 *tl++ = txdr_unsigned(RPCAUTH_NULL); 740 *tl = 0; 741 } 742 mb->m_next = mrest; 743 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 744 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 745 *mbp = mb; 746 return (mreq); 747 } 748 749 /* 750 * copies mbuf chain to the uio scatter/gather list 751 */ 752 int 753 nfsm_mbuftouio(mrep, uiop, siz, dpos) 754 struct mbuf **mrep; 755 struct uio *uiop; 756 int siz; 757 char **dpos; 758 { 759 char *mbufcp, *uiocp; 760 int xfer, left, len; 761 struct mbuf *mp; 762 long uiosiz, rem; 763 int error = 0; 764 765 mp = *mrep; 766 mbufcp = *dpos; 767 len = mtod(mp, char *) + mp->m_len - mbufcp; 768 rem = nfsm_rndup(siz)-siz; 769 while (siz > 0) { 770 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 771 return (EFBIG); 772 left = uiop->uio_iov->iov_len; 773 uiocp = uiop->uio_iov->iov_base; 774 if (left > siz) 775 left = siz; 776 uiosiz = left; 777 while (left > 0) { 778 while (len == 0) { 779 mp = mp->m_next; 780 if (mp == NULL) 781 return (EBADRPC); 782 mbufcp = mtod(mp, void *); 783 len = mp->m_len; 784 } 785 xfer = (left > len) ? len : left; 786 error = copyout_vmspace(uiop->uio_vmspace, mbufcp, 787 uiocp, xfer); 788 if (error) { 789 return error; 790 } 791 left -= xfer; 792 len -= xfer; 793 mbufcp += xfer; 794 uiocp += xfer; 795 uiop->uio_offset += xfer; 796 uiop->uio_resid -= xfer; 797 } 798 if (uiop->uio_iov->iov_len <= siz) { 799 uiop->uio_iovcnt--; 800 uiop->uio_iov++; 801 } else { 802 uiop->uio_iov->iov_base = 803 (char *)uiop->uio_iov->iov_base + uiosiz; 804 uiop->uio_iov->iov_len -= uiosiz; 805 } 806 siz -= uiosiz; 807 } 808 *dpos = mbufcp; 809 *mrep = mp; 810 if (rem > 0) { 811 if (len < rem) 812 error = nfs_adv(mrep, dpos, rem, len); 813 else 814 *dpos += rem; 815 } 816 return (error); 817 } 818 819 /* 820 * copies a uio scatter/gather list to an mbuf chain. 821 * NOTE: can ony handle iovcnt == 1 822 */ 823 int 824 nfsm_uiotombuf(uiop, mq, siz, bpos) 825 struct uio *uiop; 826 struct mbuf **mq; 827 int siz; 828 char **bpos; 829 { 830 char *uiocp; 831 struct mbuf *mp, *mp2; 832 int xfer, left, mlen; 833 int uiosiz, clflg, rem; 834 char *cp; 835 int error; 836 837 #ifdef DIAGNOSTIC 838 if (uiop->uio_iovcnt != 1) 839 panic("nfsm_uiotombuf: iovcnt != 1"); 840 #endif 841 842 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 843 clflg = 1; 844 else 845 clflg = 0; 846 rem = nfsm_rndup(siz)-siz; 847 mp = mp2 = *mq; 848 while (siz > 0) { 849 left = uiop->uio_iov->iov_len; 850 uiocp = uiop->uio_iov->iov_base; 851 if (left > siz) 852 left = siz; 853 uiosiz = left; 854 while (left > 0) { 855 mlen = M_TRAILINGSPACE(mp); 856 if (mlen == 0) { 857 mp = m_get(M_WAIT, MT_DATA); 858 MCLAIM(mp, &nfs_mowner); 859 if (clflg) 860 m_clget(mp, M_WAIT); 861 mp->m_len = 0; 862 mp2->m_next = mp; 863 mp2 = mp; 864 mlen = M_TRAILINGSPACE(mp); 865 } 866 xfer = (left > mlen) ? mlen : left; 867 cp = mtod(mp, char *) + mp->m_len; 868 error = copyin_vmspace(uiop->uio_vmspace, uiocp, cp, 869 xfer); 870 if (error) { 871 /* XXX */ 872 } 873 mp->m_len += xfer; 874 left -= xfer; 875 uiocp += xfer; 876 uiop->uio_offset += xfer; 877 uiop->uio_resid -= xfer; 878 } 879 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + 880 uiosiz; 881 uiop->uio_iov->iov_len -= uiosiz; 882 siz -= uiosiz; 883 } 884 if (rem > 0) { 885 if (rem > M_TRAILINGSPACE(mp)) { 886 mp = m_get(M_WAIT, MT_DATA); 887 MCLAIM(mp, &nfs_mowner); 888 mp->m_len = 0; 889 mp2->m_next = mp; 890 } 891 cp = mtod(mp, char *) + mp->m_len; 892 for (left = 0; left < rem; left++) 893 *cp++ = '\0'; 894 mp->m_len += rem; 895 *bpos = cp; 896 } else 897 *bpos = mtod(mp, char *) + mp->m_len; 898 *mq = mp; 899 return (0); 900 } 901 902 /* 903 * Get at least "siz" bytes of correctly aligned data. 904 * When called the mbuf pointers are not necessarily correct, 905 * dsosp points to what ought to be in m_data and left contains 906 * what ought to be in m_len. 907 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 908 * cases. (The macros use the vars. dpos and dpos2) 909 */ 910 int 911 nfsm_disct(mdp, dposp, siz, left, cp2) 912 struct mbuf **mdp; 913 char **dposp; 914 int siz; 915 int left; 916 char **cp2; 917 { 918 struct mbuf *m1, *m2; 919 struct mbuf *havebuf = NULL; 920 char *src = *dposp; 921 char *dst; 922 int len; 923 924 #ifdef DEBUG 925 if (left < 0) 926 panic("nfsm_disct: left < 0"); 927 #endif 928 m1 = *mdp; 929 /* 930 * Skip through the mbuf chain looking for an mbuf with 931 * some data. If the first mbuf found has enough data 932 * and it is correctly aligned return it. 933 */ 934 while (left == 0) { 935 havebuf = m1; 936 *mdp = m1 = m1->m_next; 937 if (m1 == NULL) 938 return (EBADRPC); 939 src = mtod(m1, void *); 940 left = m1->m_len; 941 /* 942 * If we start a new mbuf and it is big enough 943 * and correctly aligned just return it, don't 944 * do any pull up. 945 */ 946 if (left >= siz && nfsm_aligned(src)) { 947 *cp2 = src; 948 *dposp = src + siz; 949 return (0); 950 } 951 } 952 if ((m1->m_flags & M_EXT) != 0) { 953 if (havebuf && M_TRAILINGSPACE(havebuf) >= siz && 954 nfsm_aligned(mtod(havebuf, char *) + havebuf->m_len)) { 955 /* 956 * If the first mbuf with data has external data 957 * and there is a previous mbuf with some trailing 958 * space, use it to move the data into. 959 */ 960 m2 = m1; 961 *mdp = m1 = havebuf; 962 *cp2 = mtod(m1, char *) + m1->m_len; 963 } else if (havebuf) { 964 /* 965 * If the first mbuf has a external data 966 * and there is no previous empty mbuf 967 * allocate a new mbuf and move the external 968 * data to the new mbuf. Also make the first 969 * mbuf look empty. 970 */ 971 m2 = m1; 972 *mdp = m1 = m_get(M_WAIT, MT_DATA); 973 MCLAIM(m1, m2->m_owner); 974 if ((m2->m_flags & M_PKTHDR) != 0) { 975 /* XXX MOVE */ 976 M_COPY_PKTHDR(m1, m2); 977 m_tag_delete_chain(m2, NULL); 978 m2->m_flags &= ~M_PKTHDR; 979 } 980 if (havebuf) { 981 havebuf->m_next = m1; 982 } 983 m1->m_next = m2; 984 MRESETDATA(m1); 985 m1->m_len = 0; 986 m2->m_data = src; 987 m2->m_len = left; 988 *cp2 = mtod(m1, char *); 989 } else { 990 struct mbuf **nextp = &m1->m_next; 991 992 m1->m_len -= left; 993 do { 994 m2 = m_get(M_WAIT, MT_DATA); 995 MCLAIM(m2, m1->m_owner); 996 if (left >= MINCLSIZE) { 997 MCLGET(m2, M_WAIT); 998 } 999 m2->m_next = *nextp; 1000 *nextp = m2; 1001 nextp = &m2->m_next; 1002 len = (m2->m_flags & M_EXT) != 0 ? 1003 MCLBYTES : MLEN; 1004 if (len > left) { 1005 len = left; 1006 } 1007 memcpy(mtod(m2, char *), src, len); 1008 m2->m_len = len; 1009 src += len; 1010 left -= len; 1011 } while (left > 0); 1012 *mdp = m1 = m1->m_next; 1013 m2 = m1->m_next; 1014 *cp2 = mtod(m1, char *); 1015 } 1016 } else { 1017 /* 1018 * If the first mbuf has no external data 1019 * move the data to the front of the mbuf. 1020 */ 1021 MRESETDATA(m1); 1022 dst = mtod(m1, char *); 1023 if (dst != src) { 1024 memmove(dst, src, left); 1025 } 1026 m1->m_len = left; 1027 m2 = m1->m_next; 1028 *cp2 = m1->m_data; 1029 } 1030 *dposp = *cp2 + siz; 1031 /* 1032 * Loop through mbufs pulling data up into first mbuf until 1033 * the first mbuf is full or there is no more data to 1034 * pullup. 1035 */ 1036 dst = mtod(m1, char *) + m1->m_len; 1037 while ((len = M_TRAILINGSPACE(m1)) != 0 && m2) { 1038 if ((len = min(len, m2->m_len)) != 0) { 1039 memcpy(dst, mtod(m2, char *), len); 1040 } 1041 m1->m_len += len; 1042 dst += len; 1043 m2->m_data += len; 1044 m2->m_len -= len; 1045 m2 = m2->m_next; 1046 } 1047 if (m1->m_len < siz) 1048 return (EBADRPC); 1049 return (0); 1050 } 1051 1052 /* 1053 * Advance the position in the mbuf chain. 1054 */ 1055 int 1056 nfs_adv(mdp, dposp, offs, left) 1057 struct mbuf **mdp; 1058 char **dposp; 1059 int offs; 1060 int left; 1061 { 1062 struct mbuf *m; 1063 int s; 1064 1065 m = *mdp; 1066 s = left; 1067 while (s < offs) { 1068 offs -= s; 1069 m = m->m_next; 1070 if (m == NULL) 1071 return (EBADRPC); 1072 s = m->m_len; 1073 } 1074 *mdp = m; 1075 *dposp = mtod(m, char *) + offs; 1076 return (0); 1077 } 1078 1079 /* 1080 * Copy a string into mbufs for the hard cases... 1081 */ 1082 int 1083 nfsm_strtmbuf(mb, bpos, cp, siz) 1084 struct mbuf **mb; 1085 char **bpos; 1086 const char *cp; 1087 long siz; 1088 { 1089 struct mbuf *m1 = NULL, *m2; 1090 long left, xfer, len, tlen; 1091 u_int32_t *tl; 1092 int putsize; 1093 1094 putsize = 1; 1095 m2 = *mb; 1096 left = M_TRAILINGSPACE(m2); 1097 if (left > 0) { 1098 tl = ((u_int32_t *)(*bpos)); 1099 *tl++ = txdr_unsigned(siz); 1100 putsize = 0; 1101 left -= NFSX_UNSIGNED; 1102 m2->m_len += NFSX_UNSIGNED; 1103 if (left > 0) { 1104 memcpy((void *) tl, cp, left); 1105 siz -= left; 1106 cp += left; 1107 m2->m_len += left; 1108 left = 0; 1109 } 1110 } 1111 /* Loop around adding mbufs */ 1112 while (siz > 0) { 1113 m1 = m_get(M_WAIT, MT_DATA); 1114 MCLAIM(m1, &nfs_mowner); 1115 if (siz > MLEN) 1116 m_clget(m1, M_WAIT); 1117 m1->m_len = NFSMSIZ(m1); 1118 m2->m_next = m1; 1119 m2 = m1; 1120 tl = mtod(m1, u_int32_t *); 1121 tlen = 0; 1122 if (putsize) { 1123 *tl++ = txdr_unsigned(siz); 1124 m1->m_len -= NFSX_UNSIGNED; 1125 tlen = NFSX_UNSIGNED; 1126 putsize = 0; 1127 } 1128 if (siz < m1->m_len) { 1129 len = nfsm_rndup(siz); 1130 xfer = siz; 1131 if (xfer < len) 1132 *(tl+(xfer>>2)) = 0; 1133 } else { 1134 xfer = len = m1->m_len; 1135 } 1136 memcpy((void *) tl, cp, xfer); 1137 m1->m_len = len+tlen; 1138 siz -= xfer; 1139 cp += xfer; 1140 } 1141 *mb = m1; 1142 *bpos = mtod(m1, char *) + m1->m_len; 1143 return (0); 1144 } 1145 1146 /* 1147 * Directory caching routines. They work as follows: 1148 * - a cache is maintained per VDIR nfsnode. 1149 * - for each offset cookie that is exported to userspace, and can 1150 * thus be thrown back at us as an offset to VOP_READDIR, store 1151 * information in the cache. 1152 * - cached are: 1153 * - cookie itself 1154 * - blocknumber (essentially just a search key in the buffer cache) 1155 * - entry number in block. 1156 * - offset cookie of block in which this entry is stored 1157 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1158 * - entries are looked up in a hash table 1159 * - also maintained is an LRU list of entries, used to determine 1160 * which ones to delete if the cache grows too large. 1161 * - if 32 <-> 64 translation mode is requested for a filesystem, 1162 * the cache also functions as a translation table 1163 * - in the translation case, invalidating the cache does not mean 1164 * flushing it, but just marking entries as invalid, except for 1165 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1166 * still be able to use the cache as a translation table. 1167 * - 32 bit cookies are uniquely created by combining the hash table 1168 * entry value, and one generation count per hash table entry, 1169 * incremented each time an entry is appended to the chain. 1170 * - the cache is invalidated each time a direcory is modified 1171 * - sanity checks are also done; if an entry in a block turns 1172 * out not to have a matching cookie, the cache is invalidated 1173 * and a new block starting from the wanted offset is fetched from 1174 * the server. 1175 * - directory entries as read from the server are extended to contain 1176 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1177 * the cache and exporting them to userspace through the cookie 1178 * argument to VOP_READDIR. 1179 */ 1180 1181 u_long 1182 nfs_dirhash(off) 1183 off_t off; 1184 { 1185 int i; 1186 char *cp = (char *)&off; 1187 u_long sum = 0L; 1188 1189 for (i = 0 ; i < sizeof (off); i++) 1190 sum += *cp++; 1191 1192 return sum; 1193 } 1194 1195 #define _NFSDC_MTX(np) (&NFSTOV(np)->v_interlock) 1196 #define NFSDC_LOCK(np) mutex_enter(_NFSDC_MTX(np)) 1197 #define NFSDC_UNLOCK(np) mutex_exit(_NFSDC_MTX(np)) 1198 #define NFSDC_ASSERT_LOCKED(np) KASSERT(mutex_owned(_NFSDC_MTX(np))) 1199 1200 void 1201 nfs_initdircache(vp) 1202 struct vnode *vp; 1203 { 1204 struct nfsnode *np = VTONFS(vp); 1205 struct nfsdirhashhead *dircache; 1206 1207 dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, true, 1208 &nfsdirhashmask); 1209 1210 NFSDC_LOCK(np); 1211 if (np->n_dircache == NULL) { 1212 np->n_dircachesize = 0; 1213 np->n_dircache = dircache; 1214 dircache = NULL; 1215 TAILQ_INIT(&np->n_dirchain); 1216 } 1217 NFSDC_UNLOCK(np); 1218 if (dircache) 1219 hashdone(dircache, HASH_LIST, nfsdirhashmask); 1220 } 1221 1222 void 1223 nfs_initdirxlatecookie(vp) 1224 struct vnode *vp; 1225 { 1226 struct nfsnode *np = VTONFS(vp); 1227 unsigned *dirgens; 1228 1229 KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1230 1231 dirgens = kmem_zalloc(NFS_DIRHASHSIZ * sizeof(unsigned), KM_SLEEP); 1232 NFSDC_LOCK(np); 1233 if (np->n_dirgens == NULL) { 1234 np->n_dirgens = dirgens; 1235 dirgens = NULL; 1236 } 1237 NFSDC_UNLOCK(np); 1238 if (dirgens) 1239 kmem_free(dirgens, NFS_DIRHASHSIZ * sizeof(unsigned)); 1240 } 1241 1242 static const struct nfsdircache dzero; 1243 1244 static void nfs_unlinkdircache __P((struct nfsnode *np, struct nfsdircache *)); 1245 static void nfs_putdircache_unlocked __P((struct nfsnode *, 1246 struct nfsdircache *)); 1247 1248 static void 1249 nfs_unlinkdircache(np, ndp) 1250 struct nfsnode *np; 1251 struct nfsdircache *ndp; 1252 { 1253 1254 NFSDC_ASSERT_LOCKED(np); 1255 KASSERT(ndp != &dzero); 1256 1257 if (LIST_NEXT(ndp, dc_hash) == (void *)-1) 1258 return; 1259 1260 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1261 LIST_REMOVE(ndp, dc_hash); 1262 LIST_NEXT(ndp, dc_hash) = (void *)-1; /* mark as unlinked */ 1263 1264 nfs_putdircache_unlocked(np, ndp); 1265 } 1266 1267 void 1268 nfs_putdircache(np, ndp) 1269 struct nfsnode *np; 1270 struct nfsdircache *ndp; 1271 { 1272 int ref; 1273 1274 if (ndp == &dzero) 1275 return; 1276 1277 KASSERT(ndp->dc_refcnt > 0); 1278 NFSDC_LOCK(np); 1279 ref = --ndp->dc_refcnt; 1280 NFSDC_UNLOCK(np); 1281 1282 if (ref == 0) 1283 kmem_free(ndp, sizeof(*ndp)); 1284 } 1285 1286 static void 1287 nfs_putdircache_unlocked(struct nfsnode *np, struct nfsdircache *ndp) 1288 { 1289 int ref; 1290 1291 NFSDC_ASSERT_LOCKED(np); 1292 1293 if (ndp == &dzero) 1294 return; 1295 1296 KASSERT(ndp->dc_refcnt > 0); 1297 ref = --ndp->dc_refcnt; 1298 if (ref == 0) 1299 kmem_free(ndp, sizeof(*ndp)); 1300 } 1301 1302 struct nfsdircache * 1303 nfs_searchdircache(vp, off, do32, hashent) 1304 struct vnode *vp; 1305 off_t off; 1306 int do32; 1307 int *hashent; 1308 { 1309 struct nfsdirhashhead *ndhp; 1310 struct nfsdircache *ndp = NULL; 1311 struct nfsnode *np = VTONFS(vp); 1312 unsigned ent; 1313 1314 /* 1315 * Zero is always a valid cookie. 1316 */ 1317 if (off == 0) 1318 /* XXXUNCONST */ 1319 return (struct nfsdircache *)__UNCONST(&dzero); 1320 1321 if (!np->n_dircache) 1322 return NULL; 1323 1324 /* 1325 * We use a 32bit cookie as search key, directly reconstruct 1326 * the hashentry. Else use the hashfunction. 1327 */ 1328 if (do32) { 1329 ent = (u_int32_t)off >> 24; 1330 if (ent >= NFS_DIRHASHSIZ) 1331 return NULL; 1332 ndhp = &np->n_dircache[ent]; 1333 } else { 1334 ndhp = NFSDIRHASH(np, off); 1335 } 1336 1337 if (hashent) 1338 *hashent = (int)(ndhp - np->n_dircache); 1339 1340 NFSDC_LOCK(np); 1341 if (do32) { 1342 LIST_FOREACH(ndp, ndhp, dc_hash) { 1343 if (ndp->dc_cookie32 == (u_int32_t)off) { 1344 /* 1345 * An invalidated entry will become the 1346 * start of a new block fetched from 1347 * the server. 1348 */ 1349 if (ndp->dc_flags & NFSDC_INVALID) { 1350 ndp->dc_blkcookie = ndp->dc_cookie; 1351 ndp->dc_entry = 0; 1352 ndp->dc_flags &= ~NFSDC_INVALID; 1353 } 1354 break; 1355 } 1356 } 1357 } else { 1358 LIST_FOREACH(ndp, ndhp, dc_hash) { 1359 if (ndp->dc_cookie == off) 1360 break; 1361 } 1362 } 1363 if (ndp != NULL) 1364 ndp->dc_refcnt++; 1365 NFSDC_UNLOCK(np); 1366 return ndp; 1367 } 1368 1369 1370 struct nfsdircache * 1371 nfs_enterdircache(struct vnode *vp, off_t off, off_t blkoff, int en, 1372 daddr_t blkno) 1373 { 1374 struct nfsnode *np = VTONFS(vp); 1375 struct nfsdirhashhead *ndhp; 1376 struct nfsdircache *ndp = NULL; 1377 struct nfsdircache *newndp = NULL; 1378 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1379 int hashent = 0, gen, overwrite; /* XXX: GCC */ 1380 1381 /* 1382 * XXX refuse entries for offset 0. amd(8) erroneously sets 1383 * cookie 0 for the '.' entry, making this necessary. This 1384 * isn't so bad, as 0 is a special case anyway. 1385 */ 1386 if (off == 0) 1387 /* XXXUNCONST */ 1388 return (struct nfsdircache *)__UNCONST(&dzero); 1389 1390 if (!np->n_dircache) 1391 /* 1392 * XXX would like to do this in nfs_nget but vtype 1393 * isn't known at that time. 1394 */ 1395 nfs_initdircache(vp); 1396 1397 if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1398 nfs_initdirxlatecookie(vp); 1399 1400 retry: 1401 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1402 1403 NFSDC_LOCK(np); 1404 if (ndp && (ndp->dc_flags & NFSDC_INVALID) == 0) { 1405 /* 1406 * Overwriting an old entry. Check if it's the same. 1407 * If so, just return. If not, remove the old entry. 1408 */ 1409 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1410 goto done; 1411 nfs_unlinkdircache(np, ndp); 1412 nfs_putdircache_unlocked(np, ndp); 1413 ndp = NULL; 1414 } 1415 1416 ndhp = &np->n_dircache[hashent]; 1417 1418 if (!ndp) { 1419 if (newndp == NULL) { 1420 NFSDC_UNLOCK(np); 1421 newndp = kmem_alloc(sizeof(*newndp), KM_SLEEP); 1422 newndp->dc_refcnt = 1; 1423 LIST_NEXT(newndp, dc_hash) = (void *)-1; 1424 goto retry; 1425 } 1426 ndp = newndp; 1427 newndp = NULL; 1428 overwrite = 0; 1429 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1430 /* 1431 * We're allocating a new entry, so bump the 1432 * generation number. 1433 */ 1434 KASSERT(np->n_dirgens); 1435 gen = ++np->n_dirgens[hashent]; 1436 if (gen == 0) { 1437 np->n_dirgens[hashent]++; 1438 gen++; 1439 } 1440 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1441 } 1442 } else 1443 overwrite = 1; 1444 1445 ndp->dc_cookie = off; 1446 ndp->dc_blkcookie = blkoff; 1447 ndp->dc_entry = en; 1448 ndp->dc_flags = 0; 1449 1450 if (overwrite) 1451 goto done; 1452 1453 /* 1454 * If the maximum directory cookie cache size has been reached 1455 * for this node, take one off the front. The idea is that 1456 * directories are typically read front-to-back once, so that 1457 * the oldest entries can be thrown away without much performance 1458 * loss. 1459 */ 1460 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1461 nfs_unlinkdircache(np, TAILQ_FIRST(&np->n_dirchain)); 1462 } else 1463 np->n_dircachesize++; 1464 1465 KASSERT(ndp->dc_refcnt == 1); 1466 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1467 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1468 ndp->dc_refcnt++; 1469 done: 1470 KASSERT(ndp->dc_refcnt > 0); 1471 NFSDC_UNLOCK(np); 1472 if (newndp) 1473 nfs_putdircache(np, newndp); 1474 return ndp; 1475 } 1476 1477 void 1478 nfs_invaldircache(vp, flags) 1479 struct vnode *vp; 1480 int flags; 1481 { 1482 struct nfsnode *np = VTONFS(vp); 1483 struct nfsdircache *ndp = NULL; 1484 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1485 const bool forcefree = flags & NFS_INVALDIRCACHE_FORCE; 1486 1487 #ifdef DIAGNOSTIC 1488 if (vp->v_type != VDIR) 1489 panic("nfs: invaldircache: not dir"); 1490 #endif 1491 1492 if ((flags & NFS_INVALDIRCACHE_KEEPEOF) == 0) 1493 np->n_flag &= ~NEOFVALID; 1494 1495 if (!np->n_dircache) 1496 return; 1497 1498 NFSDC_LOCK(np); 1499 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1500 while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != NULL) { 1501 KASSERT(!forcefree || ndp->dc_refcnt == 1); 1502 nfs_unlinkdircache(np, ndp); 1503 } 1504 np->n_dircachesize = 0; 1505 if (forcefree && np->n_dirgens) { 1506 kmem_free(np->n_dirgens, 1507 NFS_DIRHASHSIZ * sizeof(unsigned)); 1508 np->n_dirgens = NULL; 1509 } 1510 } else { 1511 TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) 1512 ndp->dc_flags |= NFSDC_INVALID; 1513 } 1514 1515 NFSDC_UNLOCK(np); 1516 } 1517 1518 /* 1519 * Called once before VFS init to initialize shared and 1520 * server-specific data structures. 1521 */ 1522 static int 1523 nfs_init0(void) 1524 { 1525 1526 nfsrtt.pos = 0; 1527 rpc_vers = txdr_unsigned(RPC_VER2); 1528 rpc_call = txdr_unsigned(RPC_CALL); 1529 rpc_reply = txdr_unsigned(RPC_REPLY); 1530 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1531 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1532 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1533 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1534 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1535 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1536 nfs_prog = txdr_unsigned(NFS_PROG); 1537 nfs_true = txdr_unsigned(true); 1538 nfs_false = txdr_unsigned(false); 1539 nfs_xdrneg1 = txdr_unsigned(-1); 1540 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1541 if (nfs_ticks < 1) 1542 nfs_ticks = 1; 1543 nfs_xid = arc4random(); 1544 #ifdef NFSSERVER 1545 vfs_hooks_attach(&nfs_export_hooks); 1546 nfsrv_init(0); /* Init server data structures */ 1547 nfsrv_initcache(); /* Init the server request cache */ 1548 { 1549 extern krwlock_t netexport_lock; /* XXX */ 1550 rw_init(&netexport_lock); 1551 } 1552 #endif /* NFSSERVER */ 1553 1554 #if defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) 1555 nfsdreq_init(); 1556 #endif /* defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) */ 1557 1558 /* 1559 * Initialize reply list and start timer 1560 */ 1561 TAILQ_INIT(&nfs_reqq); 1562 nfs_timer_init(); 1563 MOWNER_ATTACH(&nfs_mowner); 1564 1565 #ifdef NFS 1566 /* Initialize the kqueue structures */ 1567 nfs_kqinit(); 1568 /* Initialize the iod structures */ 1569 nfs_iodinit(); 1570 #endif 1571 1572 return 0; 1573 } 1574 1575 void 1576 nfs_init(void) 1577 { 1578 static ONCE_DECL(nfs_init_once); 1579 1580 RUN_ONCE(&nfs_init_once, nfs_init0); 1581 } 1582 1583 #ifdef NFS 1584 /* 1585 * Called once at VFS init to initialize client-specific data structures. 1586 */ 1587 void 1588 nfs_vfs_init() 1589 { 1590 1591 /* Initialize NFS server / client shared data. */ 1592 nfs_init(); 1593 nfs_node_init(); 1594 1595 nfs_commitsize = uvmexp.npages << (PAGE_SHIFT - 4); 1596 } 1597 1598 void 1599 nfs_vfs_done() 1600 { 1601 nfs_node_done(); 1602 } 1603 1604 /* 1605 * Attribute cache routines. 1606 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1607 * that are on the mbuf list 1608 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1609 * error otherwise 1610 */ 1611 1612 /* 1613 * Load the attribute cache (that lives in the nfsnode entry) with 1614 * the values on the mbuf list and 1615 * Iff vap not NULL 1616 * copy the attributes to *vaper 1617 */ 1618 int 1619 nfsm_loadattrcache(vpp, mdp, dposp, vaper, flags) 1620 struct vnode **vpp; 1621 struct mbuf **mdp; 1622 char **dposp; 1623 struct vattr *vaper; 1624 int flags; 1625 { 1626 int32_t t1; 1627 char *cp2; 1628 int error = 0; 1629 struct mbuf *md; 1630 int v3 = NFS_ISV3(*vpp); 1631 1632 md = *mdp; 1633 t1 = (mtod(md, char *) + md->m_len) - *dposp; 1634 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1635 if (error) 1636 return (error); 1637 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); 1638 } 1639 1640 int 1641 nfs_loadattrcache(vpp, fp, vaper, flags) 1642 struct vnode **vpp; 1643 struct nfs_fattr *fp; 1644 struct vattr *vaper; 1645 int flags; 1646 { 1647 struct vnode *vp = *vpp; 1648 struct vattr *vap; 1649 int v3 = NFS_ISV3(vp); 1650 enum vtype vtyp; 1651 u_short vmode; 1652 struct timespec mtime; 1653 struct timespec ctime; 1654 int32_t rdev; 1655 struct nfsnode *np; 1656 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1657 uid_t uid; 1658 gid_t gid; 1659 1660 if (v3) { 1661 vtyp = nfsv3tov_type(fp->fa_type); 1662 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1663 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 1664 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 1665 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1666 fxdr_nfsv3time(&fp->fa3_ctime, &ctime); 1667 } else { 1668 vtyp = nfsv2tov_type(fp->fa_type); 1669 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1670 if (vtyp == VNON || vtyp == VREG) 1671 vtyp = IFTOVT(vmode); 1672 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1673 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1674 ctime.tv_sec = fxdr_unsigned(u_int32_t, 1675 fp->fa2_ctime.nfsv2_sec); 1676 ctime.tv_nsec = 0; 1677 1678 /* 1679 * Really ugly NFSv2 kludge. 1680 */ 1681 if (vtyp == VCHR && rdev == 0xffffffff) 1682 vtyp = VFIFO; 1683 } 1684 1685 vmode &= ALLPERMS; 1686 1687 /* 1688 * If v_type == VNON it is a new node, so fill in the v_type, 1689 * n_mtime fields. Check to see if it represents a special 1690 * device, and if so, check for a possible alias. Once the 1691 * correct vnode has been obtained, fill in the rest of the 1692 * information. 1693 */ 1694 np = VTONFS(vp); 1695 if (vp->v_type == VNON) { 1696 vp->v_type = vtyp; 1697 if (vp->v_type == VFIFO) { 1698 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1699 vp->v_op = fifo_nfsv2nodeop_p; 1700 } else if (vp->v_type == VREG) { 1701 mutex_init(&np->n_commitlock, MUTEX_DEFAULT, IPL_NONE); 1702 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1703 vp->v_op = spec_nfsv2nodeop_p; 1704 spec_node_init(vp, (dev_t)rdev); 1705 } 1706 np->n_mtime = mtime; 1707 } 1708 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1709 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1710 vap = np->n_vattr; 1711 1712 /* 1713 * Invalidate access cache if uid, gid, mode or ctime changed. 1714 */ 1715 if (np->n_accstamp != -1 && 1716 (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode 1717 || timespeccmp(&ctime, &vap->va_ctime, !=))) 1718 np->n_accstamp = -1; 1719 1720 vap->va_type = vtyp; 1721 vap->va_mode = vmode; 1722 vap->va_rdev = (dev_t)rdev; 1723 vap->va_mtime = mtime; 1724 vap->va_ctime = ctime; 1725 vap->va_birthtime.tv_sec = VNOVAL; 1726 vap->va_birthtime.tv_nsec = VNOVAL; 1727 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1728 switch (vtyp) { 1729 case VDIR: 1730 vap->va_blocksize = NFS_DIRFRAGSIZ; 1731 break; 1732 case VBLK: 1733 vap->va_blocksize = BLKDEV_IOSIZE; 1734 break; 1735 case VCHR: 1736 vap->va_blocksize = MAXBSIZE; 1737 break; 1738 default: 1739 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1740 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1741 break; 1742 } 1743 if (v3) { 1744 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1745 vap->va_uid = uid; 1746 vap->va_gid = gid; 1747 vap->va_size = fxdr_hyper(&fp->fa3_size); 1748 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1749 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 1750 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1751 vap->va_flags = 0; 1752 vap->va_filerev = 0; 1753 } else { 1754 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1755 vap->va_uid = uid; 1756 vap->va_gid = gid; 1757 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1758 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1759 * NFS_FABLKSIZE; 1760 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1761 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1762 vap->va_flags = 0; 1763 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1764 vap->va_filerev = 0; 1765 } 1766 if (vap->va_size > VFSTONFS(vp->v_mount)->nm_maxfilesize) { 1767 return EFBIG; 1768 } 1769 if (vap->va_size != np->n_size) { 1770 if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { 1771 vap->va_size = np->n_size; 1772 } else { 1773 np->n_size = vap->va_size; 1774 if (vap->va_type == VREG) { 1775 /* 1776 * we can't free pages if NAC_NOTRUNC because 1777 * the pages can be owned by ourselves. 1778 */ 1779 if (flags & NAC_NOTRUNC) { 1780 np->n_flag |= NTRUNCDELAYED; 1781 } else { 1782 genfs_node_wrlock(vp); 1783 mutex_enter(&vp->v_interlock); 1784 (void)VOP_PUTPAGES(vp, 0, 1785 0, PGO_SYNCIO | PGO_CLEANIT | 1786 PGO_FREE | PGO_ALLPAGES); 1787 uvm_vnp_setsize(vp, np->n_size); 1788 genfs_node_unlock(vp); 1789 } 1790 } 1791 } 1792 } 1793 np->n_attrstamp = time_second; 1794 if (vaper != NULL) { 1795 memcpy((void *)vaper, (void *)vap, sizeof(*vap)); 1796 if (np->n_flag & NCHG) { 1797 if (np->n_flag & NACC) 1798 vaper->va_atime = np->n_atim; 1799 if (np->n_flag & NUPD) 1800 vaper->va_mtime = np->n_mtim; 1801 } 1802 } 1803 return (0); 1804 } 1805 1806 /* 1807 * Check the time stamp 1808 * If the cache is valid, copy contents to *vap and return 0 1809 * otherwise return an error 1810 */ 1811 int 1812 nfs_getattrcache(vp, vaper) 1813 struct vnode *vp; 1814 struct vattr *vaper; 1815 { 1816 struct nfsnode *np = VTONFS(vp); 1817 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1818 struct vattr *vap; 1819 1820 if (np->n_attrstamp == 0 || 1821 (time_second - np->n_attrstamp) >= nfs_attrtimeo(nmp, np)) { 1822 nfsstats.attrcache_misses++; 1823 return (ENOENT); 1824 } 1825 nfsstats.attrcache_hits++; 1826 vap = np->n_vattr; 1827 if (vap->va_size != np->n_size) { 1828 if (vap->va_type == VREG) { 1829 if ((np->n_flag & NMODIFIED) != 0 && 1830 vap->va_size < np->n_size) { 1831 vap->va_size = np->n_size; 1832 } else { 1833 np->n_size = vap->va_size; 1834 } 1835 genfs_node_wrlock(vp); 1836 uvm_vnp_setsize(vp, np->n_size); 1837 genfs_node_unlock(vp); 1838 } else 1839 np->n_size = vap->va_size; 1840 } 1841 memcpy((void *)vaper, (void *)vap, sizeof(struct vattr)); 1842 if (np->n_flag & NCHG) { 1843 if (np->n_flag & NACC) 1844 vaper->va_atime = np->n_atim; 1845 if (np->n_flag & NUPD) 1846 vaper->va_mtime = np->n_mtim; 1847 } 1848 return (0); 1849 } 1850 1851 void 1852 nfs_delayedtruncate(vp) 1853 struct vnode *vp; 1854 { 1855 struct nfsnode *np = VTONFS(vp); 1856 1857 if (np->n_flag & NTRUNCDELAYED) { 1858 np->n_flag &= ~NTRUNCDELAYED; 1859 genfs_node_wrlock(vp); 1860 mutex_enter(&vp->v_interlock); 1861 (void)VOP_PUTPAGES(vp, 0, 1862 0, PGO_SYNCIO | PGO_CLEANIT | PGO_FREE | PGO_ALLPAGES); 1863 uvm_vnp_setsize(vp, np->n_size); 1864 genfs_node_unlock(vp); 1865 } 1866 } 1867 1868 #define NFS_WCCKLUDGE_TIMEOUT (24 * 60 * 60) /* 1 day */ 1869 #define NFS_WCCKLUDGE(nmp, now) \ 1870 (((nmp)->nm_iflag & NFSMNT_WCCKLUDGE) && \ 1871 ((now) - (nmp)->nm_wcckludgetime - NFS_WCCKLUDGE_TIMEOUT) < 0) 1872 1873 /* 1874 * nfs_check_wccdata: check inaccurate wcc_data 1875 * 1876 * => return non-zero if we shouldn't trust the wcc_data. 1877 * => NFS_WCCKLUDGE_TIMEOUT is for the case that the server is "fixed". 1878 */ 1879 1880 int 1881 nfs_check_wccdata(struct nfsnode *np, const struct timespec *ctime, 1882 struct timespec *mtime, bool docheck) 1883 { 1884 int error = 0; 1885 1886 #if !defined(NFS_V2_ONLY) 1887 1888 if (docheck) { 1889 struct vnode *vp = NFSTOV(np); 1890 struct nfsmount *nmp; 1891 long now = time_second; 1892 const struct timespec *omtime = &np->n_vattr->va_mtime; 1893 const struct timespec *octime = &np->n_vattr->va_ctime; 1894 const char *reason = NULL; /* XXX: gcc */ 1895 1896 if (timespeccmp(omtime, mtime, <=)) { 1897 reason = "mtime"; 1898 error = EINVAL; 1899 } 1900 1901 if (vp->v_type == VDIR && timespeccmp(octime, ctime, <=)) { 1902 reason = "ctime"; 1903 error = EINVAL; 1904 } 1905 1906 nmp = VFSTONFS(vp->v_mount); 1907 if (error) { 1908 1909 /* 1910 * despite of the fact that we've updated the file, 1911 * timestamps of the file were not updated as we 1912 * expected. 1913 * it means that the server has incompatible 1914 * semantics of timestamps or (more likely) 1915 * the server time is not precise enough to 1916 * track each modifications. 1917 * in that case, we disable wcc processing. 1918 * 1919 * yes, strictly speaking, we should disable all 1920 * caching. it's a compromise. 1921 */ 1922 1923 mutex_enter(&nmp->nm_lock); 1924 if (!NFS_WCCKLUDGE(nmp, now)) { 1925 printf("%s: inaccurate wcc data (%s) detected," 1926 " disabling wcc" 1927 " (ctime %u.%09u %u.%09u," 1928 " mtime %u.%09u %u.%09u)\n", 1929 vp->v_mount->mnt_stat.f_mntfromname, 1930 reason, 1931 (unsigned int)octime->tv_sec, 1932 (unsigned int)octime->tv_nsec, 1933 (unsigned int)ctime->tv_sec, 1934 (unsigned int)ctime->tv_nsec, 1935 (unsigned int)omtime->tv_sec, 1936 (unsigned int)omtime->tv_nsec, 1937 (unsigned int)mtime->tv_sec, 1938 (unsigned int)mtime->tv_nsec); 1939 } 1940 nmp->nm_iflag |= NFSMNT_WCCKLUDGE; 1941 nmp->nm_wcckludgetime = now; 1942 mutex_exit(&nmp->nm_lock); 1943 } else if (NFS_WCCKLUDGE(nmp, now)) { 1944 error = EPERM; /* XXX */ 1945 } else if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1946 mutex_enter(&nmp->nm_lock); 1947 if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1948 printf("%s: re-enabling wcc\n", 1949 vp->v_mount->mnt_stat.f_mntfromname); 1950 nmp->nm_iflag &= ~NFSMNT_WCCKLUDGE; 1951 } 1952 mutex_exit(&nmp->nm_lock); 1953 } 1954 } 1955 1956 #endif /* !defined(NFS_V2_ONLY) */ 1957 1958 return error; 1959 } 1960 1961 /* 1962 * Heuristic to see if the server XDR encodes directory cookies or not. 1963 * it is not supposed to, but a lot of servers may do this. Also, since 1964 * most/all servers will implement V2 as well, it is expected that they 1965 * may return just 32 bits worth of cookie information, so we need to 1966 * find out in which 32 bits this information is available. We do this 1967 * to avoid trouble with emulated binaries that can't handle 64 bit 1968 * directory offsets. 1969 */ 1970 1971 void 1972 nfs_cookieheuristic(vp, flagp, l, cred) 1973 struct vnode *vp; 1974 int *flagp; 1975 struct lwp *l; 1976 kauth_cred_t cred; 1977 { 1978 struct uio auio; 1979 struct iovec aiov; 1980 char *tbuf, *cp; 1981 struct dirent *dp; 1982 off_t *cookies = NULL, *cop; 1983 int error, eof, nc, len; 1984 1985 MALLOC(tbuf, void *, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1986 1987 aiov.iov_base = tbuf; 1988 aiov.iov_len = NFS_DIRFRAGSIZ; 1989 auio.uio_iov = &aiov; 1990 auio.uio_iovcnt = 1; 1991 auio.uio_rw = UIO_READ; 1992 auio.uio_resid = NFS_DIRFRAGSIZ; 1993 auio.uio_offset = 0; 1994 UIO_SETUP_SYSSPACE(&auio); 1995 1996 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1997 1998 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1999 if (error || len == 0) { 2000 FREE(tbuf, M_TEMP); 2001 if (cookies) 2002 free(cookies, M_TEMP); 2003 return; 2004 } 2005 2006 /* 2007 * Find the first valid entry and look at its offset cookie. 2008 */ 2009 2010 cp = tbuf; 2011 for (cop = cookies; len > 0; len -= dp->d_reclen) { 2012 dp = (struct dirent *)cp; 2013 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 2014 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 2015 *flagp |= NFSMNT_SWAPCOOKIE; 2016 nfs_invaldircache(vp, 0); 2017 nfs_vinvalbuf(vp, 0, cred, l, 1); 2018 } 2019 break; 2020 } 2021 cop++; 2022 cp += dp->d_reclen; 2023 } 2024 2025 FREE(tbuf, M_TEMP); 2026 free(cookies, M_TEMP); 2027 } 2028 #endif /* NFS */ 2029 2030 #ifdef NFSSERVER 2031 /* 2032 * Set up nameidata for a lookup() call and do it. 2033 * 2034 * If pubflag is set, this call is done for a lookup operation on the 2035 * public filehandle. In that case we allow crossing mountpoints and 2036 * absolute pathnames. However, the caller is expected to check that 2037 * the lookup result is within the public fs, and deny access if 2038 * it is not. 2039 */ 2040 int 2041 nfs_namei(ndp, nsfh, len, slp, nam, mdp, dposp, retdirp, l, kerbflag, pubflag) 2042 struct nameidata *ndp; 2043 nfsrvfh_t *nsfh; 2044 uint32_t len; 2045 struct nfssvc_sock *slp; 2046 struct mbuf *nam; 2047 struct mbuf **mdp; 2048 char **dposp; 2049 struct vnode **retdirp; 2050 struct lwp *l; 2051 int kerbflag, pubflag; 2052 { 2053 int i, rem; 2054 struct mbuf *md; 2055 char *fromcp, *tocp, *cp; 2056 struct iovec aiov; 2057 struct uio auio; 2058 struct vnode *dp; 2059 int error, rdonly, linklen; 2060 struct componentname *cnp = &ndp->ni_cnd; 2061 2062 *retdirp = NULL; 2063 2064 if ((len + 1) > MAXPATHLEN) 2065 return (ENAMETOOLONG); 2066 if (len == 0) 2067 return (EACCES); 2068 cnp->cn_pnbuf = PNBUF_GET(); 2069 2070 /* 2071 * Copy the name from the mbuf list to ndp->ni_pnbuf 2072 * and set the various ndp fields appropriately. 2073 */ 2074 fromcp = *dposp; 2075 tocp = cnp->cn_pnbuf; 2076 md = *mdp; 2077 rem = mtod(md, char *) + md->m_len - fromcp; 2078 for (i = 0; i < len; i++) { 2079 while (rem == 0) { 2080 md = md->m_next; 2081 if (md == NULL) { 2082 error = EBADRPC; 2083 goto out; 2084 } 2085 fromcp = mtod(md, void *); 2086 rem = md->m_len; 2087 } 2088 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 2089 error = EACCES; 2090 goto out; 2091 } 2092 *tocp++ = *fromcp++; 2093 rem--; 2094 } 2095 *tocp = '\0'; 2096 *mdp = md; 2097 *dposp = fromcp; 2098 len = nfsm_rndup(len)-len; 2099 if (len > 0) { 2100 if (rem >= len) 2101 *dposp += len; 2102 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 2103 goto out; 2104 } 2105 2106 /* 2107 * Extract and set starting directory. 2108 */ 2109 error = nfsrv_fhtovp(nsfh, false, &dp, ndp->ni_cnd.cn_cred, slp, 2110 nam, &rdonly, kerbflag, pubflag); 2111 if (error) 2112 goto out; 2113 if (dp->v_type != VDIR) { 2114 vrele(dp); 2115 error = ENOTDIR; 2116 goto out; 2117 } 2118 2119 if (rdonly) 2120 cnp->cn_flags |= RDONLY; 2121 2122 *retdirp = dp; 2123 2124 if (pubflag) { 2125 /* 2126 * Oh joy. For WebNFS, handle those pesky '%' escapes, 2127 * and the 'native path' indicator. 2128 */ 2129 cp = PNBUF_GET(); 2130 fromcp = cnp->cn_pnbuf; 2131 tocp = cp; 2132 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 2133 switch ((unsigned char)*fromcp) { 2134 case WEBNFS_NATIVE_CHAR: 2135 /* 2136 * 'Native' path for us is the same 2137 * as a path according to the NFS spec, 2138 * just skip the escape char. 2139 */ 2140 fromcp++; 2141 break; 2142 /* 2143 * More may be added in the future, range 0x80-0xff 2144 */ 2145 default: 2146 error = EIO; 2147 vrele(dp); 2148 PNBUF_PUT(cp); 2149 goto out; 2150 } 2151 } 2152 /* 2153 * Translate the '%' escapes, URL-style. 2154 */ 2155 while (*fromcp != '\0') { 2156 if (*fromcp == WEBNFS_ESC_CHAR) { 2157 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 2158 fromcp++; 2159 *tocp++ = HEXSTRTOI(fromcp); 2160 fromcp += 2; 2161 continue; 2162 } else { 2163 error = ENOENT; 2164 vrele(dp); 2165 PNBUF_PUT(cp); 2166 goto out; 2167 } 2168 } else 2169 *tocp++ = *fromcp++; 2170 } 2171 *tocp = '\0'; 2172 PNBUF_PUT(cnp->cn_pnbuf); 2173 cnp->cn_pnbuf = cp; 2174 } 2175 2176 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 2177 ndp->ni_segflg = UIO_SYSSPACE; 2178 ndp->ni_rootdir = rootvnode; 2179 ndp->ni_erootdir = NULL; 2180 2181 if (pubflag) { 2182 ndp->ni_loopcnt = 0; 2183 if (cnp->cn_pnbuf[0] == '/') 2184 dp = rootvnode; 2185 } else { 2186 cnp->cn_flags |= NOCROSSMOUNT; 2187 } 2188 2189 VREF(dp); 2190 vn_lock(dp, LK_EXCLUSIVE | LK_RETRY); 2191 2192 for (;;) { 2193 cnp->cn_nameptr = cnp->cn_pnbuf; 2194 ndp->ni_startdir = dp; 2195 2196 /* 2197 * And call lookup() to do the real work 2198 */ 2199 error = lookup(ndp); 2200 if (error) { 2201 if (ndp->ni_dvp) { 2202 vput(ndp->ni_dvp); 2203 } 2204 PNBUF_PUT(cnp->cn_pnbuf); 2205 return (error); 2206 } 2207 2208 /* 2209 * Check for encountering a symbolic link 2210 */ 2211 if ((cnp->cn_flags & ISSYMLINK) == 0) { 2212 if ((cnp->cn_flags & LOCKPARENT) == 0 && ndp->ni_dvp) { 2213 if (ndp->ni_dvp == ndp->ni_vp) { 2214 vrele(ndp->ni_dvp); 2215 } else { 2216 vput(ndp->ni_dvp); 2217 } 2218 } 2219 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 2220 cnp->cn_flags |= HASBUF; 2221 else 2222 PNBUF_PUT(cnp->cn_pnbuf); 2223 return (0); 2224 } else { 2225 if (!pubflag) { 2226 error = EINVAL; 2227 break; 2228 } 2229 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 2230 error = ELOOP; 2231 break; 2232 } 2233 if (ndp->ni_vp->v_mount->mnt_flag & MNT_SYMPERM) { 2234 error = VOP_ACCESS(ndp->ni_vp, VEXEC, cnp->cn_cred); 2235 if (error != 0) 2236 break; 2237 } 2238 if (ndp->ni_pathlen > 1) 2239 cp = PNBUF_GET(); 2240 else 2241 cp = cnp->cn_pnbuf; 2242 aiov.iov_base = cp; 2243 aiov.iov_len = MAXPATHLEN; 2244 auio.uio_iov = &aiov; 2245 auio.uio_iovcnt = 1; 2246 auio.uio_offset = 0; 2247 auio.uio_rw = UIO_READ; 2248 auio.uio_resid = MAXPATHLEN; 2249 UIO_SETUP_SYSSPACE(&auio); 2250 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 2251 if (error) { 2252 badlink: 2253 if (ndp->ni_pathlen > 1) 2254 PNBUF_PUT(cp); 2255 break; 2256 } 2257 linklen = MAXPATHLEN - auio.uio_resid; 2258 if (linklen == 0) { 2259 error = ENOENT; 2260 goto badlink; 2261 } 2262 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 2263 error = ENAMETOOLONG; 2264 goto badlink; 2265 } 2266 if (ndp->ni_pathlen > 1) { 2267 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 2268 PNBUF_PUT(cnp->cn_pnbuf); 2269 cnp->cn_pnbuf = cp; 2270 } else 2271 cnp->cn_pnbuf[linklen] = '\0'; 2272 ndp->ni_pathlen += linklen; 2273 vput(ndp->ni_vp); 2274 dp = ndp->ni_dvp; 2275 2276 /* 2277 * Check if root directory should replace current directory. 2278 */ 2279 if (cnp->cn_pnbuf[0] == '/') { 2280 vput(dp); 2281 dp = ndp->ni_rootdir; 2282 VREF(dp); 2283 vn_lock(dp, LK_EXCLUSIVE | LK_RETRY); 2284 } 2285 } 2286 } 2287 vput(ndp->ni_dvp); 2288 vput(ndp->ni_vp); 2289 ndp->ni_vp = NULL; 2290 out: 2291 PNBUF_PUT(cnp->cn_pnbuf); 2292 return (error); 2293 } 2294 #endif /* NFSSERVER */ 2295 2296 /* 2297 * A fiddled version of m_adj() that ensures null fill to a 32-bit 2298 * boundary and only trims off the back end 2299 * 2300 * 1. trim off 'len' bytes as m_adj(mp, -len). 2301 * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 2302 */ 2303 void 2304 nfs_zeropad(mp, len, nul) 2305 struct mbuf *mp; 2306 int len; 2307 int nul; 2308 { 2309 struct mbuf *m; 2310 int count; 2311 2312 /* 2313 * Trim from tail. Scan the mbuf chain, 2314 * calculating its length and finding the last mbuf. 2315 * If the adjustment only affects this mbuf, then just 2316 * adjust and return. Otherwise, rescan and truncate 2317 * after the remaining size. 2318 */ 2319 count = 0; 2320 m = mp; 2321 for (;;) { 2322 count += m->m_len; 2323 if (m->m_next == NULL) 2324 break; 2325 m = m->m_next; 2326 } 2327 2328 KDASSERT(count >= len); 2329 2330 if (m->m_len >= len) { 2331 m->m_len -= len; 2332 } else { 2333 count -= len; 2334 /* 2335 * Correct length for chain is "count". 2336 * Find the mbuf with last data, adjust its length, 2337 * and toss data from remaining mbufs on chain. 2338 */ 2339 for (m = mp; m; m = m->m_next) { 2340 if (m->m_len >= count) { 2341 m->m_len = count; 2342 break; 2343 } 2344 count -= m->m_len; 2345 } 2346 KASSERT(m && m->m_next); 2347 m_freem(m->m_next); 2348 m->m_next = NULL; 2349 } 2350 2351 KDASSERT(m->m_next == NULL); 2352 2353 /* 2354 * zero-padding. 2355 */ 2356 if (nul > 0) { 2357 char *cp; 2358 int i; 2359 2360 if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 2361 struct mbuf *n; 2362 2363 KDASSERT(MLEN >= nul); 2364 n = m_get(M_WAIT, MT_DATA); 2365 MCLAIM(n, &nfs_mowner); 2366 n->m_len = nul; 2367 n->m_next = NULL; 2368 m->m_next = n; 2369 cp = mtod(n, void *); 2370 } else { 2371 cp = mtod(m, char *) + m->m_len; 2372 m->m_len += nul; 2373 } 2374 for (i = 0; i < nul; i++) 2375 *cp++ = '\0'; 2376 } 2377 return; 2378 } 2379 2380 /* 2381 * Make these functions instead of macros, so that the kernel text size 2382 * doesn't get too big... 2383 */ 2384 void 2385 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2386 struct nfsrv_descript *nfsd; 2387 int before_ret; 2388 struct vattr *before_vap; 2389 int after_ret; 2390 struct vattr *after_vap; 2391 struct mbuf **mbp; 2392 char **bposp; 2393 { 2394 struct mbuf *mb = *mbp; 2395 char *bpos = *bposp; 2396 u_int32_t *tl; 2397 2398 if (before_ret) { 2399 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2400 *tl = nfs_false; 2401 } else { 2402 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2403 *tl++ = nfs_true; 2404 txdr_hyper(before_vap->va_size, tl); 2405 tl += 2; 2406 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2407 tl += 2; 2408 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2409 } 2410 *bposp = bpos; 2411 *mbp = mb; 2412 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2413 } 2414 2415 void 2416 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2417 struct nfsrv_descript *nfsd; 2418 int after_ret; 2419 struct vattr *after_vap; 2420 struct mbuf **mbp; 2421 char **bposp; 2422 { 2423 struct mbuf *mb = *mbp; 2424 char *bpos = *bposp; 2425 u_int32_t *tl; 2426 struct nfs_fattr *fp; 2427 2428 if (after_ret) { 2429 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2430 *tl = nfs_false; 2431 } else { 2432 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2433 *tl++ = nfs_true; 2434 fp = (struct nfs_fattr *)tl; 2435 nfsm_srvfattr(nfsd, after_vap, fp); 2436 } 2437 *mbp = mb; 2438 *bposp = bpos; 2439 } 2440 2441 void 2442 nfsm_srvfattr(nfsd, vap, fp) 2443 struct nfsrv_descript *nfsd; 2444 struct vattr *vap; 2445 struct nfs_fattr *fp; 2446 { 2447 2448 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2449 fp->fa_uid = txdr_unsigned(vap->va_uid); 2450 fp->fa_gid = txdr_unsigned(vap->va_gid); 2451 if (nfsd->nd_flag & ND_NFSV3) { 2452 fp->fa_type = vtonfsv3_type(vap->va_type); 2453 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2454 txdr_hyper(vap->va_size, &fp->fa3_size); 2455 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2456 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2457 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2458 fp->fa3_fsid.nfsuquad[0] = 0; 2459 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2460 txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 2461 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2462 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2463 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2464 } else { 2465 fp->fa_type = vtonfsv2_type(vap->va_type); 2466 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2467 fp->fa2_size = txdr_unsigned(vap->va_size); 2468 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2469 if (vap->va_type == VFIFO) 2470 fp->fa2_rdev = 0xffffffff; 2471 else 2472 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2473 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2474 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2475 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2476 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2477 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2478 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2479 } 2480 } 2481 2482 #ifdef NFSSERVER 2483 /* 2484 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2485 * - look up fsid in mount list (if not found ret error) 2486 * - get vp and export rights by calling VFS_FHTOVP() 2487 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2488 * - if not lockflag unlock it with VOP_UNLOCK() 2489 */ 2490 int 2491 nfsrv_fhtovp(nfsrvfh_t *nsfh, int lockflag, struct vnode **vpp, 2492 kauth_cred_t cred, struct nfssvc_sock *slp, struct mbuf *nam, int *rdonlyp, 2493 int kerbflag, int pubflag) 2494 { 2495 struct mount *mp; 2496 kauth_cred_t credanon; 2497 int error, exflags; 2498 struct sockaddr_in *saddr; 2499 fhandle_t *fhp; 2500 2501 fhp = NFSRVFH_FHANDLE(nsfh); 2502 *vpp = (struct vnode *)0; 2503 2504 if (nfs_ispublicfh(nsfh)) { 2505 if (!pubflag || !nfs_pub.np_valid) 2506 return (ESTALE); 2507 fhp = nfs_pub.np_handle; 2508 } 2509 2510 error = netexport_check(&fhp->fh_fsid, nam, &mp, &exflags, &credanon); 2511 if (error) { 2512 return error; 2513 } 2514 2515 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2516 if (error) 2517 return (error); 2518 2519 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2520 saddr = mtod(nam, struct sockaddr_in *); 2521 if ((saddr->sin_family == AF_INET) && 2522 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2523 vput(*vpp); 2524 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2525 } 2526 #ifdef INET6 2527 if ((saddr->sin_family == AF_INET6) && 2528 ntohs(saddr->sin_port) >= IPV6PORT_RESERVED) { 2529 vput(*vpp); 2530 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2531 } 2532 #endif 2533 } 2534 /* 2535 * Check/setup credentials. 2536 */ 2537 if (exflags & MNT_EXKERB) { 2538 if (!kerbflag) { 2539 vput(*vpp); 2540 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2541 } 2542 } else if (kerbflag) { 2543 vput(*vpp); 2544 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2545 } else if (kauth_cred_geteuid(cred) == 0 || /* NFS maproot, see below */ 2546 (exflags & MNT_EXPORTANON)) { 2547 /* 2548 * This is used by the NFS maproot option. While we can change 2549 * the secmodel on our own host, we can't change it on the 2550 * clients. As means of least surprise, we're doing the 2551 * traditional thing here. 2552 * Should look into adding a "mapprivileged" or similar where 2553 * the users can be explicitly specified... 2554 * [elad, yamt 2008-03-05] 2555 */ 2556 kauth_cred_clone(credanon, cred); 2557 } 2558 if (exflags & MNT_EXRDONLY) 2559 *rdonlyp = 1; 2560 else 2561 *rdonlyp = 0; 2562 if (!lockflag) 2563 VOP_UNLOCK(*vpp, 0); 2564 return (0); 2565 } 2566 2567 /* 2568 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2569 * means a length of 0, for v2 it means all zeroes. 2570 */ 2571 int 2572 nfs_ispublicfh(const nfsrvfh_t *nsfh) 2573 { 2574 const char *cp = (const void *)(NFSRVFH_DATA(nsfh)); 2575 int i; 2576 2577 if (NFSRVFH_SIZE(nsfh) == 0) { 2578 return true; 2579 } 2580 if (NFSRVFH_SIZE(nsfh) != NFSX_V2FH) { 2581 return false; 2582 } 2583 for (i = 0; i < NFSX_V2FH; i++) 2584 if (*cp++ != 0) 2585 return false; 2586 return true; 2587 } 2588 #endif /* NFSSERVER */ 2589 2590 /* 2591 * This function compares two net addresses by family and returns true 2592 * if they are the same host. 2593 * If there is any doubt, return false. 2594 * The AF_INET family is handled as a special case so that address mbufs 2595 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2596 */ 2597 int 2598 netaddr_match(family, haddr, nam) 2599 int family; 2600 union nethostaddr *haddr; 2601 struct mbuf *nam; 2602 { 2603 struct sockaddr_in *inetaddr; 2604 2605 switch (family) { 2606 case AF_INET: 2607 inetaddr = mtod(nam, struct sockaddr_in *); 2608 if (inetaddr->sin_family == AF_INET && 2609 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2610 return (1); 2611 break; 2612 #ifdef INET6 2613 case AF_INET6: 2614 { 2615 struct sockaddr_in6 *sin6_1, *sin6_2; 2616 2617 sin6_1 = mtod(nam, struct sockaddr_in6 *); 2618 sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 2619 if (sin6_1->sin6_family == AF_INET6 && 2620 IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 2621 return 1; 2622 } 2623 #endif 2624 #ifdef ISO 2625 case AF_ISO: 2626 { 2627 struct sockaddr_iso *isoaddr1, *isoaddr2; 2628 2629 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2630 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2631 if (isoaddr1->siso_family == AF_ISO && 2632 isoaddr1->siso_nlen > 0 && 2633 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2634 SAME_ISOADDR(isoaddr1, isoaddr2)) 2635 return (1); 2636 break; 2637 } 2638 #endif /* ISO */ 2639 default: 2640 break; 2641 }; 2642 return (0); 2643 } 2644 2645 /* 2646 * The write verifier has changed (probably due to a server reboot), so all 2647 * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 2648 * as dirty or are being written out just now, all this takes is clearing 2649 * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 2650 * the mount point. 2651 */ 2652 void 2653 nfs_clearcommit(mp) 2654 struct mount *mp; 2655 { 2656 struct vnode *vp; 2657 struct nfsnode *np; 2658 struct vm_page *pg; 2659 struct nfsmount *nmp = VFSTONFS(mp); 2660 2661 rw_enter(&nmp->nm_writeverflock, RW_WRITER); 2662 mutex_enter(&mntvnode_lock); 2663 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 2664 KASSERT(vp->v_mount == mp); 2665 if (vp->v_type != VREG) 2666 continue; 2667 np = VTONFS(vp); 2668 np->n_pushlo = np->n_pushhi = np->n_pushedlo = 2669 np->n_pushedhi = 0; 2670 np->n_commitflags &= 2671 ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 2672 mutex_enter(&vp->v_uobj.vmobjlock); 2673 TAILQ_FOREACH(pg, &vp->v_uobj.memq, listq.queue) { 2674 pg->flags &= ~PG_NEEDCOMMIT; 2675 } 2676 mutex_exit(&vp->v_uobj.vmobjlock); 2677 } 2678 mutex_exit(&mntvnode_lock); 2679 mutex_enter(&nmp->nm_lock); 2680 nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 2681 mutex_exit(&nmp->nm_lock); 2682 rw_exit(&nmp->nm_writeverflock); 2683 } 2684 2685 void 2686 nfs_merge_commit_ranges(vp) 2687 struct vnode *vp; 2688 { 2689 struct nfsnode *np = VTONFS(vp); 2690 2691 KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 2692 2693 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2694 np->n_pushedlo = np->n_pushlo; 2695 np->n_pushedhi = np->n_pushhi; 2696 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2697 } else { 2698 if (np->n_pushlo < np->n_pushedlo) 2699 np->n_pushedlo = np->n_pushlo; 2700 if (np->n_pushhi > np->n_pushedhi) 2701 np->n_pushedhi = np->n_pushhi; 2702 } 2703 2704 np->n_pushlo = np->n_pushhi = 0; 2705 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 2706 2707 #ifdef NFS_DEBUG_COMMIT 2708 printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2709 (unsigned)np->n_pushedhi); 2710 #endif 2711 } 2712 2713 int 2714 nfs_in_committed_range(vp, off, len) 2715 struct vnode *vp; 2716 off_t off, len; 2717 { 2718 struct nfsnode *np = VTONFS(vp); 2719 off_t lo, hi; 2720 2721 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2722 return 0; 2723 lo = off; 2724 hi = lo + len; 2725 2726 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 2727 } 2728 2729 int 2730 nfs_in_tobecommitted_range(vp, off, len) 2731 struct vnode *vp; 2732 off_t off, len; 2733 { 2734 struct nfsnode *np = VTONFS(vp); 2735 off_t lo, hi; 2736 2737 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2738 return 0; 2739 lo = off; 2740 hi = lo + len; 2741 2742 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 2743 } 2744 2745 void 2746 nfs_add_committed_range(vp, off, len) 2747 struct vnode *vp; 2748 off_t off, len; 2749 { 2750 struct nfsnode *np = VTONFS(vp); 2751 off_t lo, hi; 2752 2753 lo = off; 2754 hi = lo + len; 2755 2756 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2757 np->n_pushedlo = lo; 2758 np->n_pushedhi = hi; 2759 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2760 } else { 2761 if (hi > np->n_pushedhi) 2762 np->n_pushedhi = hi; 2763 if (lo < np->n_pushedlo) 2764 np->n_pushedlo = lo; 2765 } 2766 #ifdef NFS_DEBUG_COMMIT 2767 printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2768 (unsigned)np->n_pushedhi); 2769 #endif 2770 } 2771 2772 void 2773 nfs_del_committed_range(vp, off, len) 2774 struct vnode *vp; 2775 off_t off, len; 2776 { 2777 struct nfsnode *np = VTONFS(vp); 2778 off_t lo, hi; 2779 2780 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2781 return; 2782 2783 lo = off; 2784 hi = lo + len; 2785 2786 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 2787 return; 2788 if (lo <= np->n_pushedlo) 2789 np->n_pushedlo = hi; 2790 else if (hi >= np->n_pushedhi) 2791 np->n_pushedhi = lo; 2792 else { 2793 /* 2794 * XXX There's only one range. If the deleted range 2795 * is in the middle, pick the largest of the 2796 * contiguous ranges that it leaves. 2797 */ 2798 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 2799 np->n_pushedhi = lo; 2800 else 2801 np->n_pushedlo = hi; 2802 } 2803 #ifdef NFS_DEBUG_COMMIT 2804 printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2805 (unsigned)np->n_pushedhi); 2806 #endif 2807 } 2808 2809 void 2810 nfs_add_tobecommitted_range(vp, off, len) 2811 struct vnode *vp; 2812 off_t off, len; 2813 { 2814 struct nfsnode *np = VTONFS(vp); 2815 off_t lo, hi; 2816 2817 lo = off; 2818 hi = lo + len; 2819 2820 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 2821 np->n_pushlo = lo; 2822 np->n_pushhi = hi; 2823 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 2824 } else { 2825 if (lo < np->n_pushlo) 2826 np->n_pushlo = lo; 2827 if (hi > np->n_pushhi) 2828 np->n_pushhi = hi; 2829 } 2830 #ifdef NFS_DEBUG_COMMIT 2831 printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2832 (unsigned)np->n_pushhi); 2833 #endif 2834 } 2835 2836 void 2837 nfs_del_tobecommitted_range(vp, off, len) 2838 struct vnode *vp; 2839 off_t off, len; 2840 { 2841 struct nfsnode *np = VTONFS(vp); 2842 off_t lo, hi; 2843 2844 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2845 return; 2846 2847 lo = off; 2848 hi = lo + len; 2849 2850 if (lo > np->n_pushhi || hi < np->n_pushlo) 2851 return; 2852 2853 if (lo <= np->n_pushlo) 2854 np->n_pushlo = hi; 2855 else if (hi >= np->n_pushhi) 2856 np->n_pushhi = lo; 2857 else { 2858 /* 2859 * XXX There's only one range. If the deleted range 2860 * is in the middle, pick the largest of the 2861 * contiguous ranges that it leaves. 2862 */ 2863 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 2864 np->n_pushhi = lo; 2865 else 2866 np->n_pushlo = hi; 2867 } 2868 #ifdef NFS_DEBUG_COMMIT 2869 printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2870 (unsigned)np->n_pushhi); 2871 #endif 2872 } 2873 2874 /* 2875 * Map errnos to NFS error numbers. For Version 3 also filter out error 2876 * numbers not specified for the associated procedure. 2877 */ 2878 int 2879 nfsrv_errmap(nd, err) 2880 struct nfsrv_descript *nd; 2881 int err; 2882 { 2883 const short *defaulterrp, *errp; 2884 2885 if (nd->nd_flag & ND_NFSV3) { 2886 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2887 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2888 while (*++errp) { 2889 if (*errp == err) 2890 return (err); 2891 else if (*errp > err) 2892 break; 2893 } 2894 return ((int)*defaulterrp); 2895 } else 2896 return (err & 0xffff); 2897 } 2898 if (err <= ELAST) 2899 return ((int)nfsrv_v2errmap[err - 1]); 2900 return (NFSERR_IO); 2901 } 2902 2903 u_int32_t 2904 nfs_getxid() 2905 { 2906 u_int32_t newxid; 2907 2908 /* get next xid. skip 0 */ 2909 do { 2910 newxid = atomic_inc_32_nv(&nfs_xid); 2911 } while (__predict_false(newxid == 0)); 2912 2913 return txdr_unsigned(newxid); 2914 } 2915 2916 /* 2917 * assign a new xid for existing request. 2918 * used for NFSERR_JUKEBOX handling. 2919 */ 2920 void 2921 nfs_renewxid(struct nfsreq *req) 2922 { 2923 u_int32_t xid; 2924 int off; 2925 2926 xid = nfs_getxid(); 2927 if (req->r_nmp->nm_sotype == SOCK_STREAM) 2928 off = sizeof(u_int32_t); /* RPC record mark */ 2929 else 2930 off = 0; 2931 2932 m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2933 req->r_xid = xid; 2934 } 2935 2936 #if defined(NFSSERVER) 2937 int 2938 nfsrv_composefh(struct vnode *vp, nfsrvfh_t *nsfh, bool v3) 2939 { 2940 int error; 2941 size_t fhsize; 2942 2943 fhsize = NFSD_MAXFHSIZE; 2944 error = vfs_composefh(vp, (void *)NFSRVFH_DATA(nsfh), &fhsize); 2945 if (NFSX_FHTOOBIG_P(fhsize, v3)) { 2946 error = EOPNOTSUPP; 2947 } 2948 if (error != 0) { 2949 return error; 2950 } 2951 if (!v3 && fhsize < NFSX_V2FH) { 2952 memset((char *)NFSRVFH_DATA(nsfh) + fhsize, 0, 2953 NFSX_V2FH - fhsize); 2954 fhsize = NFSX_V2FH; 2955 } 2956 if ((fhsize % NFSX_UNSIGNED) != 0) { 2957 return EOPNOTSUPP; 2958 } 2959 nsfh->nsfh_size = fhsize; 2960 return 0; 2961 } 2962 2963 int 2964 nfsrv_comparefh(const nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 2965 { 2966 2967 if (NFSRVFH_SIZE(fh1) != NFSRVFH_SIZE(fh2)) { 2968 return NFSRVFH_SIZE(fh2) - NFSRVFH_SIZE(fh1); 2969 } 2970 return memcmp(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), NFSRVFH_SIZE(fh1)); 2971 } 2972 2973 void 2974 nfsrv_copyfh(nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 2975 { 2976 size_t size; 2977 2978 fh1->nsfh_size = size = NFSRVFH_SIZE(fh2); 2979 memcpy(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), size); 2980 } 2981 #endif /* defined(NFSSERVER) */ 2982 2983 #if defined(NFS) 2984 /* 2985 * Set the attribute timeout based on how recently the file has been modified. 2986 */ 2987 2988 time_t 2989 nfs_attrtimeo(struct nfsmount *nmp, struct nfsnode *np) 2990 { 2991 time_t timeo; 2992 2993 if ((nmp->nm_flag & NFSMNT_NOAC) != 0) 2994 return 0; 2995 2996 if (((np)->n_flag & NMODIFIED) != 0) 2997 return NFS_MINATTRTIMO; 2998 2999 timeo = (time_second - np->n_mtime.tv_sec) / 10; 3000 timeo = max(timeo, NFS_MINATTRTIMO); 3001 timeo = min(timeo, NFS_MAXATTRTIMO); 3002 return timeo; 3003 } 3004 #endif /* defined(NFS) */
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