nfs_subs.c revision 1.198
1 /* $NetBSD: nfs_subs.c,v 1.198 2008/01/28 10:44:51 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 1.198 2008/01/28 10:44:51 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/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/malloc.h> 98 #include <sys/filedesc.h> 99 #include <sys/time.h> 100 #include <sys/dirent.h> 101 #include <sys/once.h> 102 #include <sys/kauth.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 /* 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, 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 }; 178 179 /* 180 * and the reverse mapping from generic to Version 2 procedure numbers 181 */ 182 const int nfsv2_procid[NFS_NPROCS] = { 183 NFSV2PROC_NULL, 184 NFSV2PROC_GETATTR, 185 NFSV2PROC_SETATTR, 186 NFSV2PROC_LOOKUP, 187 NFSV2PROC_NOOP, 188 NFSV2PROC_READLINK, 189 NFSV2PROC_READ, 190 NFSV2PROC_WRITE, 191 NFSV2PROC_CREATE, 192 NFSV2PROC_MKDIR, 193 NFSV2PROC_SYMLINK, 194 NFSV2PROC_CREATE, 195 NFSV2PROC_REMOVE, 196 NFSV2PROC_RMDIR, 197 NFSV2PROC_RENAME, 198 NFSV2PROC_LINK, 199 NFSV2PROC_READDIR, 200 NFSV2PROC_NOOP, 201 NFSV2PROC_STATFS, 202 NFSV2PROC_NOOP, 203 NFSV2PROC_NOOP, 204 NFSV2PROC_NOOP, 205 NFSV2PROC_NOOP, 206 }; 207 208 /* 209 * Maps errno values to nfs error numbers. 210 * Use NFSERR_IO as the catch all for ones not specifically defined in 211 * RFC 1094. 212 */ 213 static const u_char nfsrv_v2errmap[ELAST] = { 214 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 215 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 216 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 217 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 218 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 219 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 220 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 221 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 227 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 231 }; 232 233 /* 234 * Maps errno values to nfs error numbers. 235 * Although it is not obvious whether or not NFS clients really care if 236 * a returned error value is in the specified list for the procedure, the 237 * safest thing to do is filter them appropriately. For Version 2, the 238 * X/Open XNFS document is the only specification that defines error values 239 * for each RPC (The RFC simply lists all possible error values for all RPCs), 240 * so I have decided to not do this for Version 2. 241 * The first entry is the default error return and the rest are the valid 242 * errors for that RPC in increasing numeric order. 243 */ 244 static const short nfsv3err_null[] = { 245 0, 246 0, 247 }; 248 249 static const short nfsv3err_getattr[] = { 250 NFSERR_IO, 251 NFSERR_IO, 252 NFSERR_STALE, 253 NFSERR_BADHANDLE, 254 NFSERR_SERVERFAULT, 255 0, 256 }; 257 258 static const short nfsv3err_setattr[] = { 259 NFSERR_IO, 260 NFSERR_PERM, 261 NFSERR_IO, 262 NFSERR_ACCES, 263 NFSERR_INVAL, 264 NFSERR_NOSPC, 265 NFSERR_ROFS, 266 NFSERR_DQUOT, 267 NFSERR_STALE, 268 NFSERR_BADHANDLE, 269 NFSERR_NOT_SYNC, 270 NFSERR_SERVERFAULT, 271 0, 272 }; 273 274 static const short nfsv3err_lookup[] = { 275 NFSERR_IO, 276 NFSERR_NOENT, 277 NFSERR_IO, 278 NFSERR_ACCES, 279 NFSERR_NOTDIR, 280 NFSERR_NAMETOL, 281 NFSERR_STALE, 282 NFSERR_BADHANDLE, 283 NFSERR_SERVERFAULT, 284 0, 285 }; 286 287 static const short nfsv3err_access[] = { 288 NFSERR_IO, 289 NFSERR_IO, 290 NFSERR_STALE, 291 NFSERR_BADHANDLE, 292 NFSERR_SERVERFAULT, 293 0, 294 }; 295 296 static const short nfsv3err_readlink[] = { 297 NFSERR_IO, 298 NFSERR_IO, 299 NFSERR_ACCES, 300 NFSERR_INVAL, 301 NFSERR_STALE, 302 NFSERR_BADHANDLE, 303 NFSERR_NOTSUPP, 304 NFSERR_SERVERFAULT, 305 0, 306 }; 307 308 static const short nfsv3err_read[] = { 309 NFSERR_IO, 310 NFSERR_IO, 311 NFSERR_NXIO, 312 NFSERR_ACCES, 313 NFSERR_INVAL, 314 NFSERR_STALE, 315 NFSERR_BADHANDLE, 316 NFSERR_SERVERFAULT, 317 NFSERR_JUKEBOX, 318 0, 319 }; 320 321 static const short nfsv3err_write[] = { 322 NFSERR_IO, 323 NFSERR_IO, 324 NFSERR_ACCES, 325 NFSERR_INVAL, 326 NFSERR_FBIG, 327 NFSERR_NOSPC, 328 NFSERR_ROFS, 329 NFSERR_DQUOT, 330 NFSERR_STALE, 331 NFSERR_BADHANDLE, 332 NFSERR_SERVERFAULT, 333 NFSERR_JUKEBOX, 334 0, 335 }; 336 337 static const short nfsv3err_create[] = { 338 NFSERR_IO, 339 NFSERR_IO, 340 NFSERR_ACCES, 341 NFSERR_EXIST, 342 NFSERR_NOTDIR, 343 NFSERR_NOSPC, 344 NFSERR_ROFS, 345 NFSERR_NAMETOL, 346 NFSERR_DQUOT, 347 NFSERR_STALE, 348 NFSERR_BADHANDLE, 349 NFSERR_NOTSUPP, 350 NFSERR_SERVERFAULT, 351 0, 352 }; 353 354 static const short nfsv3err_mkdir[] = { 355 NFSERR_IO, 356 NFSERR_IO, 357 NFSERR_ACCES, 358 NFSERR_EXIST, 359 NFSERR_NOTDIR, 360 NFSERR_NOSPC, 361 NFSERR_ROFS, 362 NFSERR_NAMETOL, 363 NFSERR_DQUOT, 364 NFSERR_STALE, 365 NFSERR_BADHANDLE, 366 NFSERR_NOTSUPP, 367 NFSERR_SERVERFAULT, 368 0, 369 }; 370 371 static const short nfsv3err_symlink[] = { 372 NFSERR_IO, 373 NFSERR_IO, 374 NFSERR_ACCES, 375 NFSERR_EXIST, 376 NFSERR_NOTDIR, 377 NFSERR_NOSPC, 378 NFSERR_ROFS, 379 NFSERR_NAMETOL, 380 NFSERR_DQUOT, 381 NFSERR_STALE, 382 NFSERR_BADHANDLE, 383 NFSERR_NOTSUPP, 384 NFSERR_SERVERFAULT, 385 0, 386 }; 387 388 static const short nfsv3err_mknod[] = { 389 NFSERR_IO, 390 NFSERR_IO, 391 NFSERR_ACCES, 392 NFSERR_EXIST, 393 NFSERR_NOTDIR, 394 NFSERR_NOSPC, 395 NFSERR_ROFS, 396 NFSERR_NAMETOL, 397 NFSERR_DQUOT, 398 NFSERR_STALE, 399 NFSERR_BADHANDLE, 400 NFSERR_NOTSUPP, 401 NFSERR_SERVERFAULT, 402 NFSERR_BADTYPE, 403 0, 404 }; 405 406 static const short nfsv3err_remove[] = { 407 NFSERR_IO, 408 NFSERR_NOENT, 409 NFSERR_IO, 410 NFSERR_ACCES, 411 NFSERR_NOTDIR, 412 NFSERR_ROFS, 413 NFSERR_NAMETOL, 414 NFSERR_STALE, 415 NFSERR_BADHANDLE, 416 NFSERR_SERVERFAULT, 417 0, 418 }; 419 420 static const short nfsv3err_rmdir[] = { 421 NFSERR_IO, 422 NFSERR_NOENT, 423 NFSERR_IO, 424 NFSERR_ACCES, 425 NFSERR_EXIST, 426 NFSERR_NOTDIR, 427 NFSERR_INVAL, 428 NFSERR_ROFS, 429 NFSERR_NAMETOL, 430 NFSERR_NOTEMPTY, 431 NFSERR_STALE, 432 NFSERR_BADHANDLE, 433 NFSERR_NOTSUPP, 434 NFSERR_SERVERFAULT, 435 0, 436 }; 437 438 static const short nfsv3err_rename[] = { 439 NFSERR_IO, 440 NFSERR_NOENT, 441 NFSERR_IO, 442 NFSERR_ACCES, 443 NFSERR_EXIST, 444 NFSERR_XDEV, 445 NFSERR_NOTDIR, 446 NFSERR_ISDIR, 447 NFSERR_INVAL, 448 NFSERR_NOSPC, 449 NFSERR_ROFS, 450 NFSERR_MLINK, 451 NFSERR_NAMETOL, 452 NFSERR_NOTEMPTY, 453 NFSERR_DQUOT, 454 NFSERR_STALE, 455 NFSERR_BADHANDLE, 456 NFSERR_NOTSUPP, 457 NFSERR_SERVERFAULT, 458 0, 459 }; 460 461 static const short nfsv3err_link[] = { 462 NFSERR_IO, 463 NFSERR_IO, 464 NFSERR_ACCES, 465 NFSERR_EXIST, 466 NFSERR_XDEV, 467 NFSERR_NOTDIR, 468 NFSERR_INVAL, 469 NFSERR_NOSPC, 470 NFSERR_ROFS, 471 NFSERR_MLINK, 472 NFSERR_NAMETOL, 473 NFSERR_DQUOT, 474 NFSERR_STALE, 475 NFSERR_BADHANDLE, 476 NFSERR_NOTSUPP, 477 NFSERR_SERVERFAULT, 478 0, 479 }; 480 481 static const short nfsv3err_readdir[] = { 482 NFSERR_IO, 483 NFSERR_IO, 484 NFSERR_ACCES, 485 NFSERR_NOTDIR, 486 NFSERR_STALE, 487 NFSERR_BADHANDLE, 488 NFSERR_BAD_COOKIE, 489 NFSERR_TOOSMALL, 490 NFSERR_SERVERFAULT, 491 0, 492 }; 493 494 static const short nfsv3err_readdirplus[] = { 495 NFSERR_IO, 496 NFSERR_IO, 497 NFSERR_ACCES, 498 NFSERR_NOTDIR, 499 NFSERR_STALE, 500 NFSERR_BADHANDLE, 501 NFSERR_BAD_COOKIE, 502 NFSERR_NOTSUPP, 503 NFSERR_TOOSMALL, 504 NFSERR_SERVERFAULT, 505 0, 506 }; 507 508 static const short nfsv3err_fsstat[] = { 509 NFSERR_IO, 510 NFSERR_IO, 511 NFSERR_STALE, 512 NFSERR_BADHANDLE, 513 NFSERR_SERVERFAULT, 514 0, 515 }; 516 517 static const short nfsv3err_fsinfo[] = { 518 NFSERR_STALE, 519 NFSERR_STALE, 520 NFSERR_BADHANDLE, 521 NFSERR_SERVERFAULT, 522 0, 523 }; 524 525 static const short nfsv3err_pathconf[] = { 526 NFSERR_STALE, 527 NFSERR_STALE, 528 NFSERR_BADHANDLE, 529 NFSERR_SERVERFAULT, 530 0, 531 }; 532 533 static const short nfsv3err_commit[] = { 534 NFSERR_IO, 535 NFSERR_IO, 536 NFSERR_STALE, 537 NFSERR_BADHANDLE, 538 NFSERR_SERVERFAULT, 539 0, 540 }; 541 542 static const short * const nfsrv_v3errmap[] = { 543 nfsv3err_null, 544 nfsv3err_getattr, 545 nfsv3err_setattr, 546 nfsv3err_lookup, 547 nfsv3err_access, 548 nfsv3err_readlink, 549 nfsv3err_read, 550 nfsv3err_write, 551 nfsv3err_create, 552 nfsv3err_mkdir, 553 nfsv3err_symlink, 554 nfsv3err_mknod, 555 nfsv3err_remove, 556 nfsv3err_rmdir, 557 nfsv3err_rename, 558 nfsv3err_link, 559 nfsv3err_readdir, 560 nfsv3err_readdirplus, 561 nfsv3err_fsstat, 562 nfsv3err_fsinfo, 563 nfsv3err_pathconf, 564 nfsv3err_commit, 565 }; 566 567 extern struct nfsrtt nfsrtt; 568 extern struct nfsnodehashhead *nfsnodehashtbl; 569 extern u_long nfsnodehash; 570 571 u_long nfsdirhashmask; 572 573 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 574 575 /* 576 * Create the header for an rpc request packet 577 * The hsiz is the size of the rest of the nfs request header. 578 * (just used to decide if a cluster is a good idea) 579 */ 580 struct mbuf * 581 nfsm_reqh(struct nfsnode *np, u_long procid, int hsiz, char **bposp) 582 { 583 struct mbuf *mb; 584 char *bpos; 585 586 mb = m_get(M_WAIT, MT_DATA); 587 MCLAIM(mb, &nfs_mowner); 588 if (hsiz >= MINCLSIZE) 589 m_clget(mb, M_WAIT); 590 mb->m_len = 0; 591 bpos = mtod(mb, void *); 592 593 /* Finally, return values */ 594 *bposp = bpos; 595 return (mb); 596 } 597 598 /* 599 * Build the RPC header and fill in the authorization info. 600 * The authorization string argument is only used when the credentials 601 * come from outside of the kernel. 602 * Returns the head of the mbuf list. 603 */ 604 struct mbuf * 605 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 606 verf_str, mrest, mrest_len, mbp, xidp) 607 kauth_cred_t cr; 608 int nmflag; 609 int procid; 610 int auth_type; 611 int auth_len; 612 char *auth_str; 613 int verf_len; 614 char *verf_str; 615 struct mbuf *mrest; 616 int mrest_len; 617 struct mbuf **mbp; 618 u_int32_t *xidp; 619 { 620 struct mbuf *mb; 621 u_int32_t *tl; 622 char *bpos; 623 int i; 624 struct mbuf *mreq; 625 int siz, grpsiz, authsiz; 626 627 authsiz = nfsm_rndup(auth_len); 628 mb = m_gethdr(M_WAIT, MT_DATA); 629 MCLAIM(mb, &nfs_mowner); 630 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 631 m_clget(mb, M_WAIT); 632 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 633 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 634 } else { 635 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 636 } 637 mb->m_len = 0; 638 mreq = mb; 639 bpos = mtod(mb, void *); 640 641 /* 642 * First the RPC header. 643 */ 644 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 645 646 *tl++ = *xidp = nfs_getxid(); 647 *tl++ = rpc_call; 648 *tl++ = rpc_vers; 649 *tl++ = txdr_unsigned(NFS_PROG); 650 if (nmflag & NFSMNT_NFSV3) 651 *tl++ = txdr_unsigned(NFS_VER3); 652 else 653 *tl++ = txdr_unsigned(NFS_VER2); 654 if (nmflag & NFSMNT_NFSV3) 655 *tl++ = txdr_unsigned(procid); 656 else 657 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 658 659 /* 660 * And then the authorization cred. 661 */ 662 *tl++ = txdr_unsigned(auth_type); 663 *tl = txdr_unsigned(authsiz); 664 switch (auth_type) { 665 case RPCAUTH_UNIX: 666 nfsm_build(tl, u_int32_t *, auth_len); 667 *tl++ = 0; /* stamp ?? */ 668 *tl++ = 0; /* NULL hostname */ 669 *tl++ = txdr_unsigned(kauth_cred_geteuid(cr)); 670 *tl++ = txdr_unsigned(kauth_cred_getegid(cr)); 671 grpsiz = (auth_len >> 2) - 5; 672 *tl++ = txdr_unsigned(grpsiz); 673 for (i = 0; i < grpsiz; i++) 674 *tl++ = txdr_unsigned(kauth_cred_group(cr, i)); /* XXX elad review */ 675 break; 676 case RPCAUTH_KERB4: 677 siz = auth_len; 678 while (siz > 0) { 679 if (M_TRAILINGSPACE(mb) == 0) { 680 struct mbuf *mb2; 681 mb2 = m_get(M_WAIT, MT_DATA); 682 MCLAIM(mb2, &nfs_mowner); 683 if (siz >= MINCLSIZE) 684 m_clget(mb2, M_WAIT); 685 mb->m_next = mb2; 686 mb = mb2; 687 mb->m_len = 0; 688 bpos = mtod(mb, void *); 689 } 690 i = min(siz, M_TRAILINGSPACE(mb)); 691 memcpy(bpos, auth_str, i); 692 mb->m_len += i; 693 auth_str += i; 694 bpos += i; 695 siz -= i; 696 } 697 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 698 for (i = 0; i < siz; i++) 699 *bpos++ = '\0'; 700 mb->m_len += siz; 701 } 702 break; 703 }; 704 705 /* 706 * And the verifier... 707 */ 708 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 709 if (verf_str) { 710 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 711 *tl = txdr_unsigned(verf_len); 712 siz = verf_len; 713 while (siz > 0) { 714 if (M_TRAILINGSPACE(mb) == 0) { 715 struct mbuf *mb2; 716 mb2 = m_get(M_WAIT, MT_DATA); 717 MCLAIM(mb2, &nfs_mowner); 718 if (siz >= MINCLSIZE) 719 m_clget(mb2, M_WAIT); 720 mb->m_next = mb2; 721 mb = mb2; 722 mb->m_len = 0; 723 bpos = mtod(mb, void *); 724 } 725 i = min(siz, M_TRAILINGSPACE(mb)); 726 memcpy(bpos, verf_str, i); 727 mb->m_len += i; 728 verf_str += i; 729 bpos += i; 730 siz -= i; 731 } 732 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 733 for (i = 0; i < siz; i++) 734 *bpos++ = '\0'; 735 mb->m_len += siz; 736 } 737 } else { 738 *tl++ = txdr_unsigned(RPCAUTH_NULL); 739 *tl = 0; 740 } 741 mb->m_next = mrest; 742 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 743 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 744 *mbp = mb; 745 return (mreq); 746 } 747 748 /* 749 * copies mbuf chain to the uio scatter/gather list 750 */ 751 int 752 nfsm_mbuftouio(mrep, uiop, siz, dpos) 753 struct mbuf **mrep; 754 struct uio *uiop; 755 int siz; 756 char **dpos; 757 { 758 char *mbufcp, *uiocp; 759 int xfer, left, len; 760 struct mbuf *mp; 761 long uiosiz, rem; 762 int error = 0; 763 764 mp = *mrep; 765 mbufcp = *dpos; 766 len = mtod(mp, char *) + mp->m_len - mbufcp; 767 rem = nfsm_rndup(siz)-siz; 768 while (siz > 0) { 769 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 770 return (EFBIG); 771 left = uiop->uio_iov->iov_len; 772 uiocp = uiop->uio_iov->iov_base; 773 if (left > siz) 774 left = siz; 775 uiosiz = left; 776 while (left > 0) { 777 while (len == 0) { 778 mp = mp->m_next; 779 if (mp == NULL) 780 return (EBADRPC); 781 mbufcp = mtod(mp, void *); 782 len = mp->m_len; 783 } 784 xfer = (left > len) ? len : left; 785 error = copyout_vmspace(uiop->uio_vmspace, mbufcp, 786 uiocp, xfer); 787 if (error) { 788 return error; 789 } 790 left -= xfer; 791 len -= xfer; 792 mbufcp += xfer; 793 uiocp += xfer; 794 uiop->uio_offset += xfer; 795 uiop->uio_resid -= xfer; 796 } 797 if (uiop->uio_iov->iov_len <= siz) { 798 uiop->uio_iovcnt--; 799 uiop->uio_iov++; 800 } else { 801 uiop->uio_iov->iov_base = 802 (char *)uiop->uio_iov->iov_base + uiosiz; 803 uiop->uio_iov->iov_len -= uiosiz; 804 } 805 siz -= uiosiz; 806 } 807 *dpos = mbufcp; 808 *mrep = mp; 809 if (rem > 0) { 810 if (len < rem) 811 error = nfs_adv(mrep, dpos, rem, len); 812 else 813 *dpos += rem; 814 } 815 return (error); 816 } 817 818 /* 819 * copies a uio scatter/gather list to an mbuf chain. 820 * NOTE: can ony handle iovcnt == 1 821 */ 822 int 823 nfsm_uiotombuf(uiop, mq, siz, bpos) 824 struct uio *uiop; 825 struct mbuf **mq; 826 int siz; 827 char **bpos; 828 { 829 char *uiocp; 830 struct mbuf *mp, *mp2; 831 int xfer, left, mlen; 832 int uiosiz, clflg, rem; 833 char *cp; 834 int error; 835 836 #ifdef DIAGNOSTIC 837 if (uiop->uio_iovcnt != 1) 838 panic("nfsm_uiotombuf: iovcnt != 1"); 839 #endif 840 841 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 842 clflg = 1; 843 else 844 clflg = 0; 845 rem = nfsm_rndup(siz)-siz; 846 mp = mp2 = *mq; 847 while (siz > 0) { 848 left = uiop->uio_iov->iov_len; 849 uiocp = uiop->uio_iov->iov_base; 850 if (left > siz) 851 left = siz; 852 uiosiz = left; 853 while (left > 0) { 854 mlen = M_TRAILINGSPACE(mp); 855 if (mlen == 0) { 856 mp = m_get(M_WAIT, MT_DATA); 857 MCLAIM(mp, &nfs_mowner); 858 if (clflg) 859 m_clget(mp, M_WAIT); 860 mp->m_len = 0; 861 mp2->m_next = mp; 862 mp2 = mp; 863 mlen = M_TRAILINGSPACE(mp); 864 } 865 xfer = (left > mlen) ? mlen : left; 866 cp = mtod(mp, char *) + mp->m_len; 867 error = copyin_vmspace(uiop->uio_vmspace, uiocp, cp, 868 xfer); 869 if (error) { 870 /* XXX */ 871 } 872 mp->m_len += xfer; 873 left -= xfer; 874 uiocp += xfer; 875 uiop->uio_offset += xfer; 876 uiop->uio_resid -= xfer; 877 } 878 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + 879 uiosiz; 880 uiop->uio_iov->iov_len -= uiosiz; 881 siz -= uiosiz; 882 } 883 if (rem > 0) { 884 if (rem > M_TRAILINGSPACE(mp)) { 885 mp = m_get(M_WAIT, MT_DATA); 886 MCLAIM(mp, &nfs_mowner); 887 mp->m_len = 0; 888 mp2->m_next = mp; 889 } 890 cp = mtod(mp, char *) + mp->m_len; 891 for (left = 0; left < rem; left++) 892 *cp++ = '\0'; 893 mp->m_len += rem; 894 *bpos = cp; 895 } else 896 *bpos = mtod(mp, char *) + mp->m_len; 897 *mq = mp; 898 return (0); 899 } 900 901 /* 902 * Get at least "siz" bytes of correctly aligned data. 903 * When called the mbuf pointers are not necessarily correct, 904 * dsosp points to what ought to be in m_data and left contains 905 * what ought to be in m_len. 906 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 907 * cases. (The macros use the vars. dpos and dpos2) 908 */ 909 int 910 nfsm_disct(mdp, dposp, siz, left, cp2) 911 struct mbuf **mdp; 912 char **dposp; 913 int siz; 914 int left; 915 char **cp2; 916 { 917 struct mbuf *m1, *m2; 918 struct mbuf *havebuf = NULL; 919 char *src = *dposp; 920 char *dst; 921 int len; 922 923 #ifdef DEBUG 924 if (left < 0) 925 panic("nfsm_disct: left < 0"); 926 #endif 927 m1 = *mdp; 928 /* 929 * Skip through the mbuf chain looking for an mbuf with 930 * some data. If the first mbuf found has enough data 931 * and it is correctly aligned return it. 932 */ 933 while (left == 0) { 934 havebuf = m1; 935 *mdp = m1 = m1->m_next; 936 if (m1 == NULL) 937 return (EBADRPC); 938 src = mtod(m1, void *); 939 left = m1->m_len; 940 /* 941 * If we start a new mbuf and it is big enough 942 * and correctly aligned just return it, don't 943 * do any pull up. 944 */ 945 if (left >= siz && nfsm_aligned(src)) { 946 *cp2 = src; 947 *dposp = src + siz; 948 return (0); 949 } 950 } 951 if (m1->m_flags & M_EXT) { 952 if (havebuf) { 953 /* If the first mbuf with data has external data 954 * and there is a previous empty mbuf use it 955 * to move the data into. 956 */ 957 m2 = m1; 958 *mdp = m1 = havebuf; 959 if (m1->m_flags & M_EXT) { 960 MEXTREMOVE(m1); 961 } 962 } else { 963 /* 964 * If the first mbuf has a external data 965 * and there is no previous empty mbuf 966 * allocate a new mbuf and move the external 967 * data to the new mbuf. Also make the first 968 * mbuf look empty. 969 */ 970 m2 = m_get(M_WAIT, MT_DATA); 971 m2->m_ext = m1->m_ext; 972 m2->m_data = src; 973 m2->m_len = left; 974 MCLADDREFERENCE(m1, m2); 975 MEXTREMOVE(m1); 976 m2->m_next = m1->m_next; 977 m1->m_next = m2; 978 } 979 m1->m_len = 0; 980 if (m1->m_flags & M_PKTHDR) 981 dst = m1->m_pktdat; 982 else 983 dst = m1->m_dat; 984 m1->m_data = dst; 985 } else { 986 /* 987 * If the first mbuf has no external data 988 * move the data to the front of the mbuf. 989 */ 990 if (m1->m_flags & M_PKTHDR) 991 dst = m1->m_pktdat; 992 else 993 dst = m1->m_dat; 994 m1->m_data = dst; 995 if (dst != src) 996 memmove(dst, src, left); 997 dst += left; 998 m1->m_len = left; 999 m2 = m1->m_next; 1000 } 1001 *cp2 = m1->m_data; 1002 *dposp = mtod(m1, char *) + siz; 1003 /* 1004 * Loop through mbufs pulling data up into first mbuf until 1005 * the first mbuf is full or there is no more data to 1006 * pullup. 1007 */ 1008 while ((len = M_TRAILINGSPACE(m1)) != 0 && m2) { 1009 if ((len = min(len, m2->m_len)) != 0) 1010 memcpy(dst, m2->m_data, len); 1011 m1->m_len += len; 1012 dst += len; 1013 m2->m_data += len; 1014 m2->m_len -= len; 1015 m2 = m2->m_next; 1016 } 1017 if (m1->m_len < siz) 1018 return (EBADRPC); 1019 return (0); 1020 } 1021 1022 /* 1023 * Advance the position in the mbuf chain. 1024 */ 1025 int 1026 nfs_adv(mdp, dposp, offs, left) 1027 struct mbuf **mdp; 1028 char **dposp; 1029 int offs; 1030 int left; 1031 { 1032 struct mbuf *m; 1033 int s; 1034 1035 m = *mdp; 1036 s = left; 1037 while (s < offs) { 1038 offs -= s; 1039 m = m->m_next; 1040 if (m == NULL) 1041 return (EBADRPC); 1042 s = m->m_len; 1043 } 1044 *mdp = m; 1045 *dposp = mtod(m, char *) + offs; 1046 return (0); 1047 } 1048 1049 /* 1050 * Copy a string into mbufs for the hard cases... 1051 */ 1052 int 1053 nfsm_strtmbuf(mb, bpos, cp, siz) 1054 struct mbuf **mb; 1055 char **bpos; 1056 const char *cp; 1057 long siz; 1058 { 1059 struct mbuf *m1 = NULL, *m2; 1060 long left, xfer, len, tlen; 1061 u_int32_t *tl; 1062 int putsize; 1063 1064 putsize = 1; 1065 m2 = *mb; 1066 left = M_TRAILINGSPACE(m2); 1067 if (left > 0) { 1068 tl = ((u_int32_t *)(*bpos)); 1069 *tl++ = txdr_unsigned(siz); 1070 putsize = 0; 1071 left -= NFSX_UNSIGNED; 1072 m2->m_len += NFSX_UNSIGNED; 1073 if (left > 0) { 1074 memcpy((void *) tl, cp, left); 1075 siz -= left; 1076 cp += left; 1077 m2->m_len += left; 1078 left = 0; 1079 } 1080 } 1081 /* Loop around adding mbufs */ 1082 while (siz > 0) { 1083 m1 = m_get(M_WAIT, MT_DATA); 1084 MCLAIM(m1, &nfs_mowner); 1085 if (siz > MLEN) 1086 m_clget(m1, M_WAIT); 1087 m1->m_len = NFSMSIZ(m1); 1088 m2->m_next = m1; 1089 m2 = m1; 1090 tl = mtod(m1, u_int32_t *); 1091 tlen = 0; 1092 if (putsize) { 1093 *tl++ = txdr_unsigned(siz); 1094 m1->m_len -= NFSX_UNSIGNED; 1095 tlen = NFSX_UNSIGNED; 1096 putsize = 0; 1097 } 1098 if (siz < m1->m_len) { 1099 len = nfsm_rndup(siz); 1100 xfer = siz; 1101 if (xfer < len) 1102 *(tl+(xfer>>2)) = 0; 1103 } else { 1104 xfer = len = m1->m_len; 1105 } 1106 memcpy((void *) tl, cp, xfer); 1107 m1->m_len = len+tlen; 1108 siz -= xfer; 1109 cp += xfer; 1110 } 1111 *mb = m1; 1112 *bpos = mtod(m1, char *) + m1->m_len; 1113 return (0); 1114 } 1115 1116 /* 1117 * Directory caching routines. They work as follows: 1118 * - a cache is maintained per VDIR nfsnode. 1119 * - for each offset cookie that is exported to userspace, and can 1120 * thus be thrown back at us as an offset to VOP_READDIR, store 1121 * information in the cache. 1122 * - cached are: 1123 * - cookie itself 1124 * - blocknumber (essentially just a search key in the buffer cache) 1125 * - entry number in block. 1126 * - offset cookie of block in which this entry is stored 1127 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1128 * - entries are looked up in a hash table 1129 * - also maintained is an LRU list of entries, used to determine 1130 * which ones to delete if the cache grows too large. 1131 * - if 32 <-> 64 translation mode is requested for a filesystem, 1132 * the cache also functions as a translation table 1133 * - in the translation case, invalidating the cache does not mean 1134 * flushing it, but just marking entries as invalid, except for 1135 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1136 * still be able to use the cache as a translation table. 1137 * - 32 bit cookies are uniquely created by combining the hash table 1138 * entry value, and one generation count per hash table entry, 1139 * incremented each time an entry is appended to the chain. 1140 * - the cache is invalidated each time a direcory is modified 1141 * - sanity checks are also done; if an entry in a block turns 1142 * out not to have a matching cookie, the cache is invalidated 1143 * and a new block starting from the wanted offset is fetched from 1144 * the server. 1145 * - directory entries as read from the server are extended to contain 1146 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1147 * the cache and exporting them to userspace through the cookie 1148 * argument to VOP_READDIR. 1149 */ 1150 1151 u_long 1152 nfs_dirhash(off) 1153 off_t off; 1154 { 1155 int i; 1156 char *cp = (char *)&off; 1157 u_long sum = 0L; 1158 1159 for (i = 0 ; i < sizeof (off); i++) 1160 sum += *cp++; 1161 1162 return sum; 1163 } 1164 1165 #define _NFSDC_MTX(np) (&NFSTOV(np)->v_interlock) 1166 #define NFSDC_LOCK(np) mutex_enter(_NFSDC_MTX(np)) 1167 #define NFSDC_UNLOCK(np) mutex_exit(_NFSDC_MTX(np)) 1168 #define NFSDC_ASSERT_LOCKED(np) KASSERT(mutex_owned(_NFSDC_MTX(np))) 1169 1170 void 1171 nfs_initdircache(vp) 1172 struct vnode *vp; 1173 { 1174 struct nfsnode *np = VTONFS(vp); 1175 struct nfsdirhashhead *dircache; 1176 1177 dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, M_NFSDIROFF, 1178 M_WAITOK, &nfsdirhashmask); 1179 1180 NFSDC_LOCK(np); 1181 if (np->n_dircache == NULL) { 1182 np->n_dircachesize = 0; 1183 np->n_dircache = dircache; 1184 dircache = NULL; 1185 TAILQ_INIT(&np->n_dirchain); 1186 } 1187 NFSDC_UNLOCK(np); 1188 if (dircache) 1189 hashdone(dircache, M_NFSDIROFF); 1190 } 1191 1192 void 1193 nfs_initdirxlatecookie(vp) 1194 struct vnode *vp; 1195 { 1196 struct nfsnode *np = VTONFS(vp); 1197 unsigned *dirgens; 1198 1199 KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1200 1201 dirgens = kmem_zalloc(NFS_DIRHASHSIZ * sizeof(unsigned), KM_SLEEP); 1202 NFSDC_LOCK(np); 1203 if (np->n_dirgens == NULL) { 1204 np->n_dirgens = dirgens; 1205 dirgens = NULL; 1206 } 1207 NFSDC_UNLOCK(np); 1208 if (dirgens) 1209 kmem_free(dirgens, NFS_DIRHASHSIZ * sizeof(unsigned)); 1210 } 1211 1212 static const struct nfsdircache dzero; 1213 1214 static void nfs_unlinkdircache __P((struct nfsnode *np, struct nfsdircache *)); 1215 static void nfs_putdircache_unlocked __P((struct nfsnode *, 1216 struct nfsdircache *)); 1217 1218 static void 1219 nfs_unlinkdircache(np, ndp) 1220 struct nfsnode *np; 1221 struct nfsdircache *ndp; 1222 { 1223 1224 NFSDC_ASSERT_LOCKED(np); 1225 KASSERT(ndp != &dzero); 1226 1227 if (LIST_NEXT(ndp, dc_hash) == (void *)-1) 1228 return; 1229 1230 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1231 LIST_REMOVE(ndp, dc_hash); 1232 LIST_NEXT(ndp, dc_hash) = (void *)-1; /* mark as unlinked */ 1233 1234 nfs_putdircache_unlocked(np, ndp); 1235 } 1236 1237 void 1238 nfs_putdircache(np, ndp) 1239 struct nfsnode *np; 1240 struct nfsdircache *ndp; 1241 { 1242 int ref; 1243 1244 if (ndp == &dzero) 1245 return; 1246 1247 KASSERT(ndp->dc_refcnt > 0); 1248 NFSDC_LOCK(np); 1249 ref = --ndp->dc_refcnt; 1250 NFSDC_UNLOCK(np); 1251 1252 if (ref == 0) 1253 kmem_free(ndp, sizeof(*ndp)); 1254 } 1255 1256 static void 1257 nfs_putdircache_unlocked(struct nfsnode *np, struct nfsdircache *ndp) 1258 { 1259 int ref; 1260 1261 NFSDC_ASSERT_LOCKED(np); 1262 1263 if (ndp == &dzero) 1264 return; 1265 1266 KASSERT(ndp->dc_refcnt > 0); 1267 ref = --ndp->dc_refcnt; 1268 if (ref == 0) 1269 kmem_free(ndp, sizeof(*ndp)); 1270 } 1271 1272 struct nfsdircache * 1273 nfs_searchdircache(vp, off, do32, hashent) 1274 struct vnode *vp; 1275 off_t off; 1276 int do32; 1277 int *hashent; 1278 { 1279 struct nfsdirhashhead *ndhp; 1280 struct nfsdircache *ndp = NULL; 1281 struct nfsnode *np = VTONFS(vp); 1282 unsigned ent; 1283 1284 /* 1285 * Zero is always a valid cookie. 1286 */ 1287 if (off == 0) 1288 /* XXXUNCONST */ 1289 return (struct nfsdircache *)__UNCONST(&dzero); 1290 1291 if (!np->n_dircache) 1292 return NULL; 1293 1294 /* 1295 * We use a 32bit cookie as search key, directly reconstruct 1296 * the hashentry. Else use the hashfunction. 1297 */ 1298 if (do32) { 1299 ent = (u_int32_t)off >> 24; 1300 if (ent >= NFS_DIRHASHSIZ) 1301 return NULL; 1302 ndhp = &np->n_dircache[ent]; 1303 } else { 1304 ndhp = NFSDIRHASH(np, off); 1305 } 1306 1307 if (hashent) 1308 *hashent = (int)(ndhp - np->n_dircache); 1309 1310 NFSDC_LOCK(np); 1311 if (do32) { 1312 LIST_FOREACH(ndp, ndhp, dc_hash) { 1313 if (ndp->dc_cookie32 == (u_int32_t)off) { 1314 /* 1315 * An invalidated entry will become the 1316 * start of a new block fetched from 1317 * the server. 1318 */ 1319 if (ndp->dc_flags & NFSDC_INVALID) { 1320 ndp->dc_blkcookie = ndp->dc_cookie; 1321 ndp->dc_entry = 0; 1322 ndp->dc_flags &= ~NFSDC_INVALID; 1323 } 1324 break; 1325 } 1326 } 1327 } else { 1328 LIST_FOREACH(ndp, ndhp, dc_hash) { 1329 if (ndp->dc_cookie == off) 1330 break; 1331 } 1332 } 1333 if (ndp != NULL) 1334 ndp->dc_refcnt++; 1335 NFSDC_UNLOCK(np); 1336 return ndp; 1337 } 1338 1339 1340 struct nfsdircache * 1341 nfs_enterdircache(struct vnode *vp, off_t off, off_t blkoff, int en, 1342 daddr_t blkno) 1343 { 1344 struct nfsnode *np = VTONFS(vp); 1345 struct nfsdirhashhead *ndhp; 1346 struct nfsdircache *ndp = NULL; 1347 struct nfsdircache *newndp = NULL; 1348 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1349 int hashent = 0, gen, overwrite; /* XXX: GCC */ 1350 1351 /* 1352 * XXX refuse entries for offset 0. amd(8) erroneously sets 1353 * cookie 0 for the '.' entry, making this necessary. This 1354 * isn't so bad, as 0 is a special case anyway. 1355 */ 1356 if (off == 0) 1357 /* XXXUNCONST */ 1358 return (struct nfsdircache *)__UNCONST(&dzero); 1359 1360 if (!np->n_dircache) 1361 /* 1362 * XXX would like to do this in nfs_nget but vtype 1363 * isn't known at that time. 1364 */ 1365 nfs_initdircache(vp); 1366 1367 if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1368 nfs_initdirxlatecookie(vp); 1369 1370 retry: 1371 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1372 1373 NFSDC_LOCK(np); 1374 if (ndp && (ndp->dc_flags & NFSDC_INVALID) == 0) { 1375 /* 1376 * Overwriting an old entry. Check if it's the same. 1377 * If so, just return. If not, remove the old entry. 1378 */ 1379 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1380 goto done; 1381 nfs_unlinkdircache(np, ndp); 1382 nfs_putdircache_unlocked(np, ndp); 1383 ndp = NULL; 1384 } 1385 1386 ndhp = &np->n_dircache[hashent]; 1387 1388 if (!ndp) { 1389 if (newndp == NULL) { 1390 NFSDC_UNLOCK(np); 1391 newndp = kmem_alloc(sizeof(*newndp), KM_SLEEP); 1392 newndp->dc_refcnt = 1; 1393 LIST_NEXT(newndp, dc_hash) = (void *)-1; 1394 goto retry; 1395 } 1396 ndp = newndp; 1397 newndp = NULL; 1398 overwrite = 0; 1399 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1400 /* 1401 * We're allocating a new entry, so bump the 1402 * generation number. 1403 */ 1404 KASSERT(np->n_dirgens); 1405 gen = ++np->n_dirgens[hashent]; 1406 if (gen == 0) { 1407 np->n_dirgens[hashent]++; 1408 gen++; 1409 } 1410 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1411 } 1412 } else 1413 overwrite = 1; 1414 1415 ndp->dc_cookie = off; 1416 ndp->dc_blkcookie = blkoff; 1417 ndp->dc_entry = en; 1418 ndp->dc_flags = 0; 1419 1420 if (overwrite) 1421 goto done; 1422 1423 /* 1424 * If the maximum directory cookie cache size has been reached 1425 * for this node, take one off the front. The idea is that 1426 * directories are typically read front-to-back once, so that 1427 * the oldest entries can be thrown away without much performance 1428 * loss. 1429 */ 1430 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1431 nfs_unlinkdircache(np, TAILQ_FIRST(&np->n_dirchain)); 1432 } else 1433 np->n_dircachesize++; 1434 1435 KASSERT(ndp->dc_refcnt == 1); 1436 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1437 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1438 ndp->dc_refcnt++; 1439 done: 1440 KASSERT(ndp->dc_refcnt > 0); 1441 NFSDC_UNLOCK(np); 1442 if (newndp) 1443 nfs_putdircache(np, newndp); 1444 return ndp; 1445 } 1446 1447 void 1448 nfs_invaldircache(vp, flags) 1449 struct vnode *vp; 1450 int flags; 1451 { 1452 struct nfsnode *np = VTONFS(vp); 1453 struct nfsdircache *ndp = NULL; 1454 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1455 const bool forcefree = flags & NFS_INVALDIRCACHE_FORCE; 1456 1457 #ifdef DIAGNOSTIC 1458 if (vp->v_type != VDIR) 1459 panic("nfs: invaldircache: not dir"); 1460 #endif 1461 1462 if ((flags & NFS_INVALDIRCACHE_KEEPEOF) == 0) 1463 np->n_flag &= ~NEOFVALID; 1464 1465 if (!np->n_dircache) 1466 return; 1467 1468 NFSDC_LOCK(np); 1469 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1470 while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != NULL) { 1471 KASSERT(!forcefree || ndp->dc_refcnt == 1); 1472 nfs_unlinkdircache(np, ndp); 1473 } 1474 np->n_dircachesize = 0; 1475 if (forcefree && np->n_dirgens) { 1476 kmem_free(np->n_dirgens, 1477 NFS_DIRHASHSIZ * sizeof(unsigned)); 1478 np->n_dirgens = NULL; 1479 } 1480 } else { 1481 TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) 1482 ndp->dc_flags |= NFSDC_INVALID; 1483 } 1484 1485 NFSDC_UNLOCK(np); 1486 } 1487 1488 /* 1489 * Called once before VFS init to initialize shared and 1490 * server-specific data structures. 1491 */ 1492 static int 1493 nfs_init0(void) 1494 { 1495 1496 nfsrtt.pos = 0; 1497 rpc_vers = txdr_unsigned(RPC_VER2); 1498 rpc_call = txdr_unsigned(RPC_CALL); 1499 rpc_reply = txdr_unsigned(RPC_REPLY); 1500 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1501 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1502 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1503 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1504 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1505 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1506 nfs_prog = txdr_unsigned(NFS_PROG); 1507 nfs_true = txdr_unsigned(true); 1508 nfs_false = txdr_unsigned(false); 1509 nfs_xdrneg1 = txdr_unsigned(-1); 1510 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1511 if (nfs_ticks < 1) 1512 nfs_ticks = 1; 1513 #ifdef NFSSERVER 1514 nfsrv_init(0); /* Init server data structures */ 1515 nfsrv_initcache(); /* Init the server request cache */ 1516 { 1517 extern krwlock_t netexport_lock; /* XXX */ 1518 rw_init(&netexport_lock); 1519 } 1520 #endif /* NFSSERVER */ 1521 1522 #if defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) 1523 nfsdreq_init(); 1524 #endif /* defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) */ 1525 1526 /* 1527 * Initialize reply list and start timer 1528 */ 1529 TAILQ_INIT(&nfs_reqq); 1530 nfs_timer_init(); 1531 MOWNER_ATTACH(&nfs_mowner); 1532 1533 #ifdef NFS 1534 /* Initialize the kqueue structures */ 1535 nfs_kqinit(); 1536 /* Initialize the iod structures */ 1537 nfs_iodinit(); 1538 #endif 1539 return 0; 1540 } 1541 1542 void 1543 nfs_init(void) 1544 { 1545 static ONCE_DECL(nfs_init_once); 1546 1547 RUN_ONCE(&nfs_init_once, nfs_init0); 1548 } 1549 1550 #ifdef NFS 1551 /* 1552 * Called once at VFS init to initialize client-specific data structures. 1553 */ 1554 void 1555 nfs_vfs_init() 1556 { 1557 /* Initialize NFS server / client shared data. */ 1558 nfs_init(); 1559 1560 nfs_nhinit(); /* Init the nfsnode table */ 1561 nfs_commitsize = uvmexp.npages << (PAGE_SHIFT - 4); 1562 } 1563 1564 void 1565 nfs_vfs_reinit() 1566 { 1567 nfs_nhreinit(); 1568 } 1569 1570 void 1571 nfs_vfs_done() 1572 { 1573 nfs_nhdone(); 1574 } 1575 1576 /* 1577 * Attribute cache routines. 1578 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1579 * that are on the mbuf list 1580 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1581 * error otherwise 1582 */ 1583 1584 /* 1585 * Load the attribute cache (that lives in the nfsnode entry) with 1586 * the values on the mbuf list and 1587 * Iff vap not NULL 1588 * copy the attributes to *vaper 1589 */ 1590 int 1591 nfsm_loadattrcache(vpp, mdp, dposp, vaper, flags) 1592 struct vnode **vpp; 1593 struct mbuf **mdp; 1594 char **dposp; 1595 struct vattr *vaper; 1596 int flags; 1597 { 1598 int32_t t1; 1599 char *cp2; 1600 int error = 0; 1601 struct mbuf *md; 1602 int v3 = NFS_ISV3(*vpp); 1603 1604 md = *mdp; 1605 t1 = (mtod(md, char *) + md->m_len) - *dposp; 1606 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1607 if (error) 1608 return (error); 1609 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); 1610 } 1611 1612 int 1613 nfs_loadattrcache(vpp, fp, vaper, flags) 1614 struct vnode **vpp; 1615 struct nfs_fattr *fp; 1616 struct vattr *vaper; 1617 int flags; 1618 { 1619 struct vnode *vp = *vpp; 1620 struct vattr *vap; 1621 int v3 = NFS_ISV3(vp); 1622 enum vtype vtyp; 1623 u_short vmode; 1624 struct timespec mtime; 1625 struct timespec ctime; 1626 int32_t rdev; 1627 struct nfsnode *np; 1628 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1629 uid_t uid; 1630 gid_t gid; 1631 1632 if (v3) { 1633 vtyp = nfsv3tov_type(fp->fa_type); 1634 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1635 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 1636 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 1637 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1638 fxdr_nfsv3time(&fp->fa3_ctime, &ctime); 1639 } else { 1640 vtyp = nfsv2tov_type(fp->fa_type); 1641 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1642 if (vtyp == VNON || vtyp == VREG) 1643 vtyp = IFTOVT(vmode); 1644 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1645 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1646 ctime.tv_sec = fxdr_unsigned(u_int32_t, 1647 fp->fa2_ctime.nfsv2_sec); 1648 ctime.tv_nsec = 0; 1649 1650 /* 1651 * Really ugly NFSv2 kludge. 1652 */ 1653 if (vtyp == VCHR && rdev == 0xffffffff) 1654 vtyp = VFIFO; 1655 } 1656 1657 vmode &= ALLPERMS; 1658 1659 /* 1660 * If v_type == VNON it is a new node, so fill in the v_type, 1661 * n_mtime fields. Check to see if it represents a special 1662 * device, and if so, check for a possible alias. Once the 1663 * correct vnode has been obtained, fill in the rest of the 1664 * information. 1665 */ 1666 np = VTONFS(vp); 1667 if (vp->v_type == VNON) { 1668 vp->v_type = vtyp; 1669 if (vp->v_type == VFIFO) { 1670 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1671 vp->v_op = fifo_nfsv2nodeop_p; 1672 } else if (vp->v_type == VREG) { 1673 mutex_init(&np->n_commitlock, MUTEX_DEFAULT, IPL_NONE); 1674 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1675 vp->v_op = spec_nfsv2nodeop_p; 1676 spec_node_init(vp, (dev_t)rdev); 1677 } 1678 np->n_mtime = mtime; 1679 } 1680 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1681 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1682 vap = np->n_vattr; 1683 1684 /* 1685 * Invalidate access cache if uid, gid, mode or ctime changed. 1686 */ 1687 if (np->n_accstamp != -1 && 1688 (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode 1689 || timespeccmp(&ctime, &vap->va_ctime, !=))) 1690 np->n_accstamp = -1; 1691 1692 vap->va_type = vtyp; 1693 vap->va_mode = vmode; 1694 vap->va_rdev = (dev_t)rdev; 1695 vap->va_mtime = mtime; 1696 vap->va_ctime = ctime; 1697 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1698 switch (vtyp) { 1699 case VDIR: 1700 vap->va_blocksize = NFS_DIRFRAGSIZ; 1701 break; 1702 case VBLK: 1703 vap->va_blocksize = BLKDEV_IOSIZE; 1704 break; 1705 case VCHR: 1706 vap->va_blocksize = MAXBSIZE; 1707 break; 1708 default: 1709 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1710 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1711 break; 1712 } 1713 if (v3) { 1714 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1715 vap->va_uid = uid; 1716 vap->va_gid = gid; 1717 vap->va_size = fxdr_hyper(&fp->fa3_size); 1718 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1719 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 1720 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1721 vap->va_flags = 0; 1722 vap->va_filerev = 0; 1723 } else { 1724 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1725 vap->va_uid = uid; 1726 vap->va_gid = gid; 1727 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1728 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1729 * NFS_FABLKSIZE; 1730 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1731 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1732 vap->va_flags = 0; 1733 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1734 vap->va_filerev = 0; 1735 } 1736 if (vap->va_size != np->n_size) { 1737 if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { 1738 vap->va_size = np->n_size; 1739 } else { 1740 np->n_size = vap->va_size; 1741 if (vap->va_type == VREG) { 1742 /* 1743 * we can't free pages if NAC_NOTRUNC because 1744 * the pages can be owned by ourselves. 1745 */ 1746 if (flags & NAC_NOTRUNC) { 1747 np->n_flag |= NTRUNCDELAYED; 1748 } else { 1749 genfs_node_wrlock(vp); 1750 mutex_enter(&vp->v_interlock); 1751 (void)VOP_PUTPAGES(vp, 0, 1752 0, PGO_SYNCIO | PGO_CLEANIT | 1753 PGO_FREE | PGO_ALLPAGES); 1754 uvm_vnp_setsize(vp, np->n_size); 1755 genfs_node_unlock(vp); 1756 } 1757 } 1758 } 1759 } 1760 np->n_attrstamp = time_second; 1761 if (vaper != NULL) { 1762 memcpy((void *)vaper, (void *)vap, sizeof(*vap)); 1763 if (np->n_flag & NCHG) { 1764 if (np->n_flag & NACC) 1765 vaper->va_atime = np->n_atim; 1766 if (np->n_flag & NUPD) 1767 vaper->va_mtime = np->n_mtim; 1768 } 1769 } 1770 return (0); 1771 } 1772 1773 /* 1774 * Check the time stamp 1775 * If the cache is valid, copy contents to *vap and return 0 1776 * otherwise return an error 1777 */ 1778 int 1779 nfs_getattrcache(vp, vaper) 1780 struct vnode *vp; 1781 struct vattr *vaper; 1782 { 1783 struct nfsnode *np = VTONFS(vp); 1784 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1785 struct vattr *vap; 1786 1787 if (np->n_attrstamp == 0 || 1788 (time_second - np->n_attrstamp) >= nfs_attrtimeo(nmp, np)) { 1789 nfsstats.attrcache_misses++; 1790 return (ENOENT); 1791 } 1792 nfsstats.attrcache_hits++; 1793 vap = np->n_vattr; 1794 if (vap->va_size != np->n_size) { 1795 if (vap->va_type == VREG) { 1796 if ((np->n_flag & NMODIFIED) != 0 && 1797 vap->va_size < np->n_size) { 1798 vap->va_size = np->n_size; 1799 } else { 1800 np->n_size = vap->va_size; 1801 } 1802 genfs_node_wrlock(vp); 1803 uvm_vnp_setsize(vp, np->n_size); 1804 genfs_node_unlock(vp); 1805 } else 1806 np->n_size = vap->va_size; 1807 } 1808 memcpy((void *)vaper, (void *)vap, sizeof(struct vattr)); 1809 if (np->n_flag & NCHG) { 1810 if (np->n_flag & NACC) 1811 vaper->va_atime = np->n_atim; 1812 if (np->n_flag & NUPD) 1813 vaper->va_mtime = np->n_mtim; 1814 } 1815 return (0); 1816 } 1817 1818 void 1819 nfs_delayedtruncate(vp) 1820 struct vnode *vp; 1821 { 1822 struct nfsnode *np = VTONFS(vp); 1823 1824 if (np->n_flag & NTRUNCDELAYED) { 1825 np->n_flag &= ~NTRUNCDELAYED; 1826 genfs_node_wrlock(vp); 1827 mutex_enter(&vp->v_interlock); 1828 (void)VOP_PUTPAGES(vp, 0, 1829 0, PGO_SYNCIO | PGO_CLEANIT | PGO_FREE | PGO_ALLPAGES); 1830 uvm_vnp_setsize(vp, np->n_size); 1831 genfs_node_unlock(vp); 1832 } 1833 } 1834 1835 #define NFS_WCCKLUDGE_TIMEOUT (24 * 60 * 60) /* 1 day */ 1836 #define NFS_WCCKLUDGE(nmp, now) \ 1837 (((nmp)->nm_iflag & NFSMNT_WCCKLUDGE) && \ 1838 ((now) - (nmp)->nm_wcckludgetime - NFS_WCCKLUDGE_TIMEOUT) < 0) 1839 1840 /* 1841 * nfs_check_wccdata: check inaccurate wcc_data 1842 * 1843 * => return non-zero if we shouldn't trust the wcc_data. 1844 * => NFS_WCCKLUDGE_TIMEOUT is for the case that the server is "fixed". 1845 */ 1846 1847 int 1848 nfs_check_wccdata(struct nfsnode *np, const struct timespec *ctime, 1849 struct timespec *mtime, bool docheck) 1850 { 1851 int error = 0; 1852 1853 #if !defined(NFS_V2_ONLY) 1854 1855 if (docheck) { 1856 struct vnode *vp = NFSTOV(np); 1857 struct nfsmount *nmp; 1858 long now = time_second; 1859 const struct timespec *omtime = &np->n_vattr->va_mtime; 1860 const struct timespec *octime = &np->n_vattr->va_ctime; 1861 const char *reason = NULL; /* XXX: gcc */ 1862 1863 if (timespeccmp(omtime, mtime, <=)) { 1864 reason = "mtime"; 1865 error = EINVAL; 1866 } 1867 1868 if (vp->v_type == VDIR && timespeccmp(octime, ctime, <=)) { 1869 reason = "ctime"; 1870 error = EINVAL; 1871 } 1872 1873 nmp = VFSTONFS(vp->v_mount); 1874 if (error) { 1875 1876 /* 1877 * despite of the fact that we've updated the file, 1878 * timestamps of the file were not updated as we 1879 * expected. 1880 * it means that the server has incompatible 1881 * semantics of timestamps or (more likely) 1882 * the server time is not precise enough to 1883 * track each modifications. 1884 * in that case, we disable wcc processing. 1885 * 1886 * yes, strictly speaking, we should disable all 1887 * caching. it's a compromise. 1888 */ 1889 1890 mutex_enter(&nmp->nm_lock); 1891 if (!NFS_WCCKLUDGE(nmp, now)) { 1892 printf("%s: inaccurate wcc data (%s) detected," 1893 " disabling wcc" 1894 " (ctime %u.%09u %u.%09u," 1895 " mtime %u.%09u %u.%09u)\n", 1896 vp->v_mount->mnt_stat.f_mntfromname, 1897 reason, 1898 (unsigned int)octime->tv_sec, 1899 (unsigned int)octime->tv_nsec, 1900 (unsigned int)ctime->tv_sec, 1901 (unsigned int)ctime->tv_nsec, 1902 (unsigned int)omtime->tv_sec, 1903 (unsigned int)omtime->tv_nsec, 1904 (unsigned int)mtime->tv_sec, 1905 (unsigned int)mtime->tv_nsec); 1906 } 1907 nmp->nm_iflag |= NFSMNT_WCCKLUDGE; 1908 nmp->nm_wcckludgetime = now; 1909 mutex_exit(&nmp->nm_lock); 1910 } else if (NFS_WCCKLUDGE(nmp, now)) { 1911 error = EPERM; /* XXX */ 1912 } else if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1913 mutex_enter(&nmp->nm_lock); 1914 if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { 1915 printf("%s: re-enabling wcc\n", 1916 vp->v_mount->mnt_stat.f_mntfromname); 1917 nmp->nm_iflag &= ~NFSMNT_WCCKLUDGE; 1918 } 1919 mutex_exit(&nmp->nm_lock); 1920 } 1921 } 1922 1923 #endif /* !defined(NFS_V2_ONLY) */ 1924 1925 return error; 1926 } 1927 1928 /* 1929 * Heuristic to see if the server XDR encodes directory cookies or not. 1930 * it is not supposed to, but a lot of servers may do this. Also, since 1931 * most/all servers will implement V2 as well, it is expected that they 1932 * may return just 32 bits worth of cookie information, so we need to 1933 * find out in which 32 bits this information is available. We do this 1934 * to avoid trouble with emulated binaries that can't handle 64 bit 1935 * directory offsets. 1936 */ 1937 1938 void 1939 nfs_cookieheuristic(vp, flagp, l, cred) 1940 struct vnode *vp; 1941 int *flagp; 1942 struct lwp *l; 1943 kauth_cred_t cred; 1944 { 1945 struct uio auio; 1946 struct iovec aiov; 1947 char *tbuf, *cp; 1948 struct dirent *dp; 1949 off_t *cookies = NULL, *cop; 1950 int error, eof, nc, len; 1951 1952 MALLOC(tbuf, void *, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1953 1954 aiov.iov_base = tbuf; 1955 aiov.iov_len = NFS_DIRFRAGSIZ; 1956 auio.uio_iov = &aiov; 1957 auio.uio_iovcnt = 1; 1958 auio.uio_rw = UIO_READ; 1959 auio.uio_resid = NFS_DIRFRAGSIZ; 1960 auio.uio_offset = 0; 1961 UIO_SETUP_SYSSPACE(&auio); 1962 1963 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1964 1965 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1966 if (error || len == 0) { 1967 FREE(tbuf, M_TEMP); 1968 if (cookies) 1969 free(cookies, M_TEMP); 1970 return; 1971 } 1972 1973 /* 1974 * Find the first valid entry and look at its offset cookie. 1975 */ 1976 1977 cp = tbuf; 1978 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1979 dp = (struct dirent *)cp; 1980 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1981 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1982 *flagp |= NFSMNT_SWAPCOOKIE; 1983 nfs_invaldircache(vp, 0); 1984 nfs_vinvalbuf(vp, 0, cred, l, 1); 1985 } 1986 break; 1987 } 1988 cop++; 1989 cp += dp->d_reclen; 1990 } 1991 1992 FREE(tbuf, M_TEMP); 1993 free(cookies, M_TEMP); 1994 } 1995 #endif /* NFS */ 1996 1997 #ifdef NFSSERVER 1998 /* 1999 * Set up nameidata for a lookup() call and do it. 2000 * 2001 * If pubflag is set, this call is done for a lookup operation on the 2002 * public filehandle. In that case we allow crossing mountpoints and 2003 * absolute pathnames. However, the caller is expected to check that 2004 * the lookup result is within the public fs, and deny access if 2005 * it is not. 2006 */ 2007 int 2008 nfs_namei(ndp, nsfh, len, slp, nam, mdp, dposp, retdirp, l, kerbflag, pubflag) 2009 struct nameidata *ndp; 2010 nfsrvfh_t *nsfh; 2011 uint32_t len; 2012 struct nfssvc_sock *slp; 2013 struct mbuf *nam; 2014 struct mbuf **mdp; 2015 char **dposp; 2016 struct vnode **retdirp; 2017 struct lwp *l; 2018 int kerbflag, pubflag; 2019 { 2020 int i, rem; 2021 struct mbuf *md; 2022 char *fromcp, *tocp, *cp; 2023 struct iovec aiov; 2024 struct uio auio; 2025 struct vnode *dp; 2026 int error, rdonly, linklen; 2027 struct componentname *cnp = &ndp->ni_cnd; 2028 2029 *retdirp = NULL; 2030 2031 if ((len + 1) > MAXPATHLEN) 2032 return (ENAMETOOLONG); 2033 if (len == 0) 2034 return (EACCES); 2035 cnp->cn_pnbuf = PNBUF_GET(); 2036 2037 /* 2038 * Copy the name from the mbuf list to ndp->ni_pnbuf 2039 * and set the various ndp fields appropriately. 2040 */ 2041 fromcp = *dposp; 2042 tocp = cnp->cn_pnbuf; 2043 md = *mdp; 2044 rem = mtod(md, char *) + md->m_len - fromcp; 2045 for (i = 0; i < len; i++) { 2046 while (rem == 0) { 2047 md = md->m_next; 2048 if (md == NULL) { 2049 error = EBADRPC; 2050 goto out; 2051 } 2052 fromcp = mtod(md, void *); 2053 rem = md->m_len; 2054 } 2055 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 2056 error = EACCES; 2057 goto out; 2058 } 2059 *tocp++ = *fromcp++; 2060 rem--; 2061 } 2062 *tocp = '\0'; 2063 *mdp = md; 2064 *dposp = fromcp; 2065 len = nfsm_rndup(len)-len; 2066 if (len > 0) { 2067 if (rem >= len) 2068 *dposp += len; 2069 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 2070 goto out; 2071 } 2072 2073 /* 2074 * Extract and set starting directory. 2075 */ 2076 error = nfsrv_fhtovp(nsfh, false, &dp, ndp->ni_cnd.cn_cred, slp, 2077 nam, &rdonly, kerbflag, pubflag); 2078 if (error) 2079 goto out; 2080 if (dp->v_type != VDIR) { 2081 vrele(dp); 2082 error = ENOTDIR; 2083 goto out; 2084 } 2085 2086 if (rdonly) 2087 cnp->cn_flags |= RDONLY; 2088 2089 *retdirp = dp; 2090 2091 if (pubflag) { 2092 /* 2093 * Oh joy. For WebNFS, handle those pesky '%' escapes, 2094 * and the 'native path' indicator. 2095 */ 2096 cp = PNBUF_GET(); 2097 fromcp = cnp->cn_pnbuf; 2098 tocp = cp; 2099 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 2100 switch ((unsigned char)*fromcp) { 2101 case WEBNFS_NATIVE_CHAR: 2102 /* 2103 * 'Native' path for us is the same 2104 * as a path according to the NFS spec, 2105 * just skip the escape char. 2106 */ 2107 fromcp++; 2108 break; 2109 /* 2110 * More may be added in the future, range 0x80-0xff 2111 */ 2112 default: 2113 error = EIO; 2114 vrele(dp); 2115 PNBUF_PUT(cp); 2116 goto out; 2117 } 2118 } 2119 /* 2120 * Translate the '%' escapes, URL-style. 2121 */ 2122 while (*fromcp != '\0') { 2123 if (*fromcp == WEBNFS_ESC_CHAR) { 2124 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 2125 fromcp++; 2126 *tocp++ = HEXSTRTOI(fromcp); 2127 fromcp += 2; 2128 continue; 2129 } else { 2130 error = ENOENT; 2131 vrele(dp); 2132 PNBUF_PUT(cp); 2133 goto out; 2134 } 2135 } else 2136 *tocp++ = *fromcp++; 2137 } 2138 *tocp = '\0'; 2139 PNBUF_PUT(cnp->cn_pnbuf); 2140 cnp->cn_pnbuf = cp; 2141 } 2142 2143 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 2144 ndp->ni_segflg = UIO_SYSSPACE; 2145 ndp->ni_rootdir = rootvnode; 2146 ndp->ni_erootdir = NULL; 2147 2148 if (pubflag) { 2149 ndp->ni_loopcnt = 0; 2150 if (cnp->cn_pnbuf[0] == '/') 2151 dp = rootvnode; 2152 } else { 2153 cnp->cn_flags |= NOCROSSMOUNT; 2154 } 2155 2156 VREF(dp); 2157 vn_lock(dp, LK_EXCLUSIVE | LK_RETRY); 2158 2159 for (;;) { 2160 cnp->cn_nameptr = cnp->cn_pnbuf; 2161 ndp->ni_startdir = dp; 2162 2163 /* 2164 * And call lookup() to do the real work 2165 */ 2166 error = lookup(ndp); 2167 if (error) { 2168 if (ndp->ni_dvp) { 2169 vput(ndp->ni_dvp); 2170 } 2171 PNBUF_PUT(cnp->cn_pnbuf); 2172 return (error); 2173 } 2174 2175 /* 2176 * Check for encountering a symbolic link 2177 */ 2178 if ((cnp->cn_flags & ISSYMLINK) == 0) { 2179 if ((cnp->cn_flags & LOCKPARENT) == 0 && ndp->ni_dvp) { 2180 if (ndp->ni_dvp == ndp->ni_vp) { 2181 vrele(ndp->ni_dvp); 2182 } else { 2183 vput(ndp->ni_dvp); 2184 } 2185 } 2186 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 2187 cnp->cn_flags |= HASBUF; 2188 else 2189 PNBUF_PUT(cnp->cn_pnbuf); 2190 return (0); 2191 } else { 2192 if (!pubflag) { 2193 error = EINVAL; 2194 break; 2195 } 2196 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 2197 error = ELOOP; 2198 break; 2199 } 2200 if (ndp->ni_vp->v_mount->mnt_flag & MNT_SYMPERM) { 2201 error = VOP_ACCESS(ndp->ni_vp, VEXEC, cnp->cn_cred); 2202 if (error != 0) 2203 break; 2204 } 2205 if (ndp->ni_pathlen > 1) 2206 cp = PNBUF_GET(); 2207 else 2208 cp = cnp->cn_pnbuf; 2209 aiov.iov_base = cp; 2210 aiov.iov_len = MAXPATHLEN; 2211 auio.uio_iov = &aiov; 2212 auio.uio_iovcnt = 1; 2213 auio.uio_offset = 0; 2214 auio.uio_rw = UIO_READ; 2215 auio.uio_resid = MAXPATHLEN; 2216 UIO_SETUP_SYSSPACE(&auio); 2217 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 2218 if (error) { 2219 badlink: 2220 if (ndp->ni_pathlen > 1) 2221 PNBUF_PUT(cp); 2222 break; 2223 } 2224 linklen = MAXPATHLEN - auio.uio_resid; 2225 if (linklen == 0) { 2226 error = ENOENT; 2227 goto badlink; 2228 } 2229 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 2230 error = ENAMETOOLONG; 2231 goto badlink; 2232 } 2233 if (ndp->ni_pathlen > 1) { 2234 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 2235 PNBUF_PUT(cnp->cn_pnbuf); 2236 cnp->cn_pnbuf = cp; 2237 } else 2238 cnp->cn_pnbuf[linklen] = '\0'; 2239 ndp->ni_pathlen += linklen; 2240 vput(ndp->ni_vp); 2241 dp = ndp->ni_dvp; 2242 2243 /* 2244 * Check if root directory should replace current directory. 2245 */ 2246 if (cnp->cn_pnbuf[0] == '/') { 2247 vput(dp); 2248 dp = ndp->ni_rootdir; 2249 VREF(dp); 2250 vn_lock(dp, LK_EXCLUSIVE | LK_RETRY); 2251 } 2252 } 2253 } 2254 vput(ndp->ni_dvp); 2255 vput(ndp->ni_vp); 2256 ndp->ni_vp = NULL; 2257 out: 2258 PNBUF_PUT(cnp->cn_pnbuf); 2259 return (error); 2260 } 2261 #endif /* NFSSERVER */ 2262 2263 /* 2264 * A fiddled version of m_adj() that ensures null fill to a 32-bit 2265 * boundary and only trims off the back end 2266 * 2267 * 1. trim off 'len' bytes as m_adj(mp, -len). 2268 * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 2269 */ 2270 void 2271 nfs_zeropad(mp, len, nul) 2272 struct mbuf *mp; 2273 int len; 2274 int nul; 2275 { 2276 struct mbuf *m; 2277 int count; 2278 2279 /* 2280 * Trim from tail. Scan the mbuf chain, 2281 * calculating its length and finding the last mbuf. 2282 * If the adjustment only affects this mbuf, then just 2283 * adjust and return. Otherwise, rescan and truncate 2284 * after the remaining size. 2285 */ 2286 count = 0; 2287 m = mp; 2288 for (;;) { 2289 count += m->m_len; 2290 if (m->m_next == NULL) 2291 break; 2292 m = m->m_next; 2293 } 2294 2295 KDASSERT(count >= len); 2296 2297 if (m->m_len >= len) { 2298 m->m_len -= len; 2299 } else { 2300 count -= len; 2301 /* 2302 * Correct length for chain is "count". 2303 * Find the mbuf with last data, adjust its length, 2304 * and toss data from remaining mbufs on chain. 2305 */ 2306 for (m = mp; m; m = m->m_next) { 2307 if (m->m_len >= count) { 2308 m->m_len = count; 2309 break; 2310 } 2311 count -= m->m_len; 2312 } 2313 KASSERT(m && m->m_next); 2314 m_freem(m->m_next); 2315 m->m_next = NULL; 2316 } 2317 2318 KDASSERT(m->m_next == NULL); 2319 2320 /* 2321 * zero-padding. 2322 */ 2323 if (nul > 0) { 2324 char *cp; 2325 int i; 2326 2327 if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 2328 struct mbuf *n; 2329 2330 KDASSERT(MLEN >= nul); 2331 n = m_get(M_WAIT, MT_DATA); 2332 MCLAIM(n, &nfs_mowner); 2333 n->m_len = nul; 2334 n->m_next = NULL; 2335 m->m_next = n; 2336 cp = mtod(n, void *); 2337 } else { 2338 cp = mtod(m, char *) + m->m_len; 2339 m->m_len += nul; 2340 } 2341 for (i = 0; i < nul; i++) 2342 *cp++ = '\0'; 2343 } 2344 return; 2345 } 2346 2347 /* 2348 * Make these functions instead of macros, so that the kernel text size 2349 * doesn't get too big... 2350 */ 2351 void 2352 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2353 struct nfsrv_descript *nfsd; 2354 int before_ret; 2355 struct vattr *before_vap; 2356 int after_ret; 2357 struct vattr *after_vap; 2358 struct mbuf **mbp; 2359 char **bposp; 2360 { 2361 struct mbuf *mb = *mbp; 2362 char *bpos = *bposp; 2363 u_int32_t *tl; 2364 2365 if (before_ret) { 2366 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2367 *tl = nfs_false; 2368 } else { 2369 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2370 *tl++ = nfs_true; 2371 txdr_hyper(before_vap->va_size, tl); 2372 tl += 2; 2373 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2374 tl += 2; 2375 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2376 } 2377 *bposp = bpos; 2378 *mbp = mb; 2379 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2380 } 2381 2382 void 2383 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2384 struct nfsrv_descript *nfsd; 2385 int after_ret; 2386 struct vattr *after_vap; 2387 struct mbuf **mbp; 2388 char **bposp; 2389 { 2390 struct mbuf *mb = *mbp; 2391 char *bpos = *bposp; 2392 u_int32_t *tl; 2393 struct nfs_fattr *fp; 2394 2395 if (after_ret) { 2396 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2397 *tl = nfs_false; 2398 } else { 2399 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2400 *tl++ = nfs_true; 2401 fp = (struct nfs_fattr *)tl; 2402 nfsm_srvfattr(nfsd, after_vap, fp); 2403 } 2404 *mbp = mb; 2405 *bposp = bpos; 2406 } 2407 2408 void 2409 nfsm_srvfattr(nfsd, vap, fp) 2410 struct nfsrv_descript *nfsd; 2411 struct vattr *vap; 2412 struct nfs_fattr *fp; 2413 { 2414 2415 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2416 fp->fa_uid = txdr_unsigned(vap->va_uid); 2417 fp->fa_gid = txdr_unsigned(vap->va_gid); 2418 if (nfsd->nd_flag & ND_NFSV3) { 2419 fp->fa_type = vtonfsv3_type(vap->va_type); 2420 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2421 txdr_hyper(vap->va_size, &fp->fa3_size); 2422 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2423 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2424 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2425 fp->fa3_fsid.nfsuquad[0] = 0; 2426 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2427 txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 2428 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2429 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2430 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2431 } else { 2432 fp->fa_type = vtonfsv2_type(vap->va_type); 2433 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2434 fp->fa2_size = txdr_unsigned(vap->va_size); 2435 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2436 if (vap->va_type == VFIFO) 2437 fp->fa2_rdev = 0xffffffff; 2438 else 2439 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2440 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2441 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2442 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2443 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2444 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2445 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2446 } 2447 } 2448 2449 #ifdef NFSSERVER 2450 /* 2451 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2452 * - look up fsid in mount list (if not found ret error) 2453 * - get vp and export rights by calling VFS_FHTOVP() 2454 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2455 * - if not lockflag unlock it with VOP_UNLOCK() 2456 */ 2457 int 2458 nfsrv_fhtovp(nfsrvfh_t *nsfh, int lockflag, struct vnode **vpp, 2459 kauth_cred_t cred, struct nfssvc_sock *slp, struct mbuf *nam, int *rdonlyp, 2460 int kerbflag, int pubflag) 2461 { 2462 struct mount *mp; 2463 kauth_cred_t credanon; 2464 int error, exflags; 2465 struct sockaddr_in *saddr; 2466 fhandle_t *fhp; 2467 2468 fhp = NFSRVFH_FHANDLE(nsfh); 2469 *vpp = (struct vnode *)0; 2470 2471 if (nfs_ispublicfh(nsfh)) { 2472 if (!pubflag || !nfs_pub.np_valid) 2473 return (ESTALE); 2474 fhp = nfs_pub.np_handle; 2475 } 2476 2477 error = netexport_check(&fhp->fh_fsid, nam, &mp, &exflags, &credanon); 2478 if (error) { 2479 return error; 2480 } 2481 2482 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2483 if (error) 2484 return (error); 2485 2486 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2487 saddr = mtod(nam, struct sockaddr_in *); 2488 if ((saddr->sin_family == AF_INET) && 2489 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2490 vput(*vpp); 2491 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2492 } 2493 #ifdef INET6 2494 if ((saddr->sin_family == AF_INET6) && 2495 ntohs(saddr->sin_port) >= IPV6PORT_RESERVED) { 2496 vput(*vpp); 2497 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2498 } 2499 #endif 2500 } 2501 /* 2502 * Check/setup credentials. 2503 */ 2504 if (exflags & MNT_EXKERB) { 2505 if (!kerbflag) { 2506 vput(*vpp); 2507 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2508 } 2509 } else if (kerbflag) { 2510 vput(*vpp); 2511 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2512 } else if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 2513 NULL) == 0 || (exflags & MNT_EXPORTANON)) { 2514 kauth_cred_clone(credanon, cred); 2515 } 2516 if (exflags & MNT_EXRDONLY) 2517 *rdonlyp = 1; 2518 else 2519 *rdonlyp = 0; 2520 if (!lockflag) 2521 VOP_UNLOCK(*vpp, 0); 2522 return (0); 2523 } 2524 2525 /* 2526 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2527 * means a length of 0, for v2 it means all zeroes. 2528 */ 2529 int 2530 nfs_ispublicfh(const nfsrvfh_t *nsfh) 2531 { 2532 const char *cp = (const void *)(NFSRVFH_DATA(nsfh)); 2533 int i; 2534 2535 if (NFSRVFH_SIZE(nsfh) == 0) { 2536 return true; 2537 } 2538 if (NFSRVFH_SIZE(nsfh) != NFSX_V2FH) { 2539 return false; 2540 } 2541 for (i = 0; i < NFSX_V2FH; i++) 2542 if (*cp++ != 0) 2543 return false; 2544 return true; 2545 } 2546 #endif /* NFSSERVER */ 2547 2548 /* 2549 * This function compares two net addresses by family and returns true 2550 * if they are the same host. 2551 * If there is any doubt, return false. 2552 * The AF_INET family is handled as a special case so that address mbufs 2553 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2554 */ 2555 int 2556 netaddr_match(family, haddr, nam) 2557 int family; 2558 union nethostaddr *haddr; 2559 struct mbuf *nam; 2560 { 2561 struct sockaddr_in *inetaddr; 2562 2563 switch (family) { 2564 case AF_INET: 2565 inetaddr = mtod(nam, struct sockaddr_in *); 2566 if (inetaddr->sin_family == AF_INET && 2567 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2568 return (1); 2569 break; 2570 #ifdef INET6 2571 case AF_INET6: 2572 { 2573 struct sockaddr_in6 *sin6_1, *sin6_2; 2574 2575 sin6_1 = mtod(nam, struct sockaddr_in6 *); 2576 sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 2577 if (sin6_1->sin6_family == AF_INET6 && 2578 IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 2579 return 1; 2580 } 2581 #endif 2582 #ifdef ISO 2583 case AF_ISO: 2584 { 2585 struct sockaddr_iso *isoaddr1, *isoaddr2; 2586 2587 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2588 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2589 if (isoaddr1->siso_family == AF_ISO && 2590 isoaddr1->siso_nlen > 0 && 2591 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2592 SAME_ISOADDR(isoaddr1, isoaddr2)) 2593 return (1); 2594 break; 2595 } 2596 #endif /* ISO */ 2597 default: 2598 break; 2599 }; 2600 return (0); 2601 } 2602 2603 /* 2604 * The write verifier has changed (probably due to a server reboot), so all 2605 * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 2606 * as dirty or are being written out just now, all this takes is clearing 2607 * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 2608 * the mount point. 2609 */ 2610 void 2611 nfs_clearcommit(mp) 2612 struct mount *mp; 2613 { 2614 struct vnode *vp; 2615 struct nfsnode *np; 2616 struct vm_page *pg; 2617 struct nfsmount *nmp = VFSTONFS(mp); 2618 2619 rw_enter(&nmp->nm_writeverflock, RW_WRITER); 2620 mutex_enter(&mntvnode_lock); 2621 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 2622 KASSERT(vp->v_mount == mp); 2623 if (vp->v_type != VREG) 2624 continue; 2625 np = VTONFS(vp); 2626 np->n_pushlo = np->n_pushhi = np->n_pushedlo = 2627 np->n_pushedhi = 0; 2628 np->n_commitflags &= 2629 ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 2630 mutex_enter(&vp->v_uobj.vmobjlock); 2631 TAILQ_FOREACH(pg, &vp->v_uobj.memq, listq) { 2632 pg->flags &= ~PG_NEEDCOMMIT; 2633 } 2634 mutex_exit(&vp->v_uobj.vmobjlock); 2635 } 2636 mutex_exit(&mntvnode_lock); 2637 mutex_enter(&nmp->nm_lock); 2638 nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 2639 mutex_exit(&nmp->nm_lock); 2640 rw_exit(&nmp->nm_writeverflock); 2641 } 2642 2643 void 2644 nfs_merge_commit_ranges(vp) 2645 struct vnode *vp; 2646 { 2647 struct nfsnode *np = VTONFS(vp); 2648 2649 KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 2650 2651 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2652 np->n_pushedlo = np->n_pushlo; 2653 np->n_pushedhi = np->n_pushhi; 2654 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2655 } else { 2656 if (np->n_pushlo < np->n_pushedlo) 2657 np->n_pushedlo = np->n_pushlo; 2658 if (np->n_pushhi > np->n_pushedhi) 2659 np->n_pushedhi = np->n_pushhi; 2660 } 2661 2662 np->n_pushlo = np->n_pushhi = 0; 2663 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 2664 2665 #ifdef NFS_DEBUG_COMMIT 2666 printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2667 (unsigned)np->n_pushedhi); 2668 #endif 2669 } 2670 2671 int 2672 nfs_in_committed_range(vp, off, len) 2673 struct vnode *vp; 2674 off_t off, len; 2675 { 2676 struct nfsnode *np = VTONFS(vp); 2677 off_t lo, hi; 2678 2679 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2680 return 0; 2681 lo = off; 2682 hi = lo + len; 2683 2684 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 2685 } 2686 2687 int 2688 nfs_in_tobecommitted_range(vp, off, len) 2689 struct vnode *vp; 2690 off_t off, len; 2691 { 2692 struct nfsnode *np = VTONFS(vp); 2693 off_t lo, hi; 2694 2695 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2696 return 0; 2697 lo = off; 2698 hi = lo + len; 2699 2700 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 2701 } 2702 2703 void 2704 nfs_add_committed_range(vp, off, len) 2705 struct vnode *vp; 2706 off_t off, len; 2707 { 2708 struct nfsnode *np = VTONFS(vp); 2709 off_t lo, hi; 2710 2711 lo = off; 2712 hi = lo + len; 2713 2714 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2715 np->n_pushedlo = lo; 2716 np->n_pushedhi = hi; 2717 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2718 } else { 2719 if (hi > np->n_pushedhi) 2720 np->n_pushedhi = hi; 2721 if (lo < np->n_pushedlo) 2722 np->n_pushedlo = lo; 2723 } 2724 #ifdef NFS_DEBUG_COMMIT 2725 printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2726 (unsigned)np->n_pushedhi); 2727 #endif 2728 } 2729 2730 void 2731 nfs_del_committed_range(vp, off, len) 2732 struct vnode *vp; 2733 off_t off, len; 2734 { 2735 struct nfsnode *np = VTONFS(vp); 2736 off_t lo, hi; 2737 2738 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2739 return; 2740 2741 lo = off; 2742 hi = lo + len; 2743 2744 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 2745 return; 2746 if (lo <= np->n_pushedlo) 2747 np->n_pushedlo = hi; 2748 else if (hi >= np->n_pushedhi) 2749 np->n_pushedhi = lo; 2750 else { 2751 /* 2752 * XXX There's only one range. If the deleted range 2753 * is in the middle, pick the largest of the 2754 * contiguous ranges that it leaves. 2755 */ 2756 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 2757 np->n_pushedhi = lo; 2758 else 2759 np->n_pushedlo = hi; 2760 } 2761 #ifdef NFS_DEBUG_COMMIT 2762 printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2763 (unsigned)np->n_pushedhi); 2764 #endif 2765 } 2766 2767 void 2768 nfs_add_tobecommitted_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_PUSH_VALID)) { 2779 np->n_pushlo = lo; 2780 np->n_pushhi = hi; 2781 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 2782 } else { 2783 if (lo < np->n_pushlo) 2784 np->n_pushlo = lo; 2785 if (hi > np->n_pushhi) 2786 np->n_pushhi = hi; 2787 } 2788 #ifdef NFS_DEBUG_COMMIT 2789 printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2790 (unsigned)np->n_pushhi); 2791 #endif 2792 } 2793 2794 void 2795 nfs_del_tobecommitted_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_PUSH_VALID)) 2803 return; 2804 2805 lo = off; 2806 hi = lo + len; 2807 2808 if (lo > np->n_pushhi || hi < np->n_pushlo) 2809 return; 2810 2811 if (lo <= np->n_pushlo) 2812 np->n_pushlo = hi; 2813 else if (hi >= np->n_pushhi) 2814 np->n_pushhi = lo; 2815 else { 2816 /* 2817 * XXX There's only one range. If the deleted range 2818 * is in the middle, pick the largest of the 2819 * contiguous ranges that it leaves. 2820 */ 2821 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 2822 np->n_pushhi = lo; 2823 else 2824 np->n_pushlo = hi; 2825 } 2826 #ifdef NFS_DEBUG_COMMIT 2827 printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2828 (unsigned)np->n_pushhi); 2829 #endif 2830 } 2831 2832 /* 2833 * Map errnos to NFS error numbers. For Version 3 also filter out error 2834 * numbers not specified for the associated procedure. 2835 */ 2836 int 2837 nfsrv_errmap(nd, err) 2838 struct nfsrv_descript *nd; 2839 int err; 2840 { 2841 const short *defaulterrp, *errp; 2842 2843 if (nd->nd_flag & ND_NFSV3) { 2844 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2845 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2846 while (*++errp) { 2847 if (*errp == err) 2848 return (err); 2849 else if (*errp > err) 2850 break; 2851 } 2852 return ((int)*defaulterrp); 2853 } else 2854 return (err & 0xffff); 2855 } 2856 if (err <= ELAST) 2857 return ((int)nfsrv_v2errmap[err - 1]); 2858 return (NFSERR_IO); 2859 } 2860 2861 u_int32_t 2862 nfs_getxid() 2863 { 2864 static u_int32_t base; 2865 static u_int32_t nfs_xid = 0; 2866 static struct simplelock nfs_xidlock = SIMPLELOCK_INITIALIZER; 2867 u_int32_t newxid; 2868 2869 simple_lock(&nfs_xidlock); 2870 /* 2871 * derive initial xid from system time 2872 * XXX time is invalid if root not yet mounted 2873 */ 2874 if (__predict_false(!base && (rootvp))) { 2875 struct timeval tv; 2876 2877 microtime(&tv); 2878 base = tv.tv_sec << 12; 2879 nfs_xid = base; 2880 } 2881 2882 /* 2883 * Skip zero xid if it should ever happen. 2884 */ 2885 if (__predict_false(++nfs_xid == 0)) 2886 nfs_xid++; 2887 newxid = nfs_xid; 2888 simple_unlock(&nfs_xidlock); 2889 2890 return txdr_unsigned(newxid); 2891 } 2892 2893 /* 2894 * assign a new xid for existing request. 2895 * used for NFSERR_JUKEBOX handling. 2896 */ 2897 void 2898 nfs_renewxid(struct nfsreq *req) 2899 { 2900 u_int32_t xid; 2901 int off; 2902 2903 xid = nfs_getxid(); 2904 if (req->r_nmp->nm_sotype == SOCK_STREAM) 2905 off = sizeof(u_int32_t); /* RPC record mark */ 2906 else 2907 off = 0; 2908 2909 m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2910 req->r_xid = xid; 2911 } 2912 2913 #if defined(NFSSERVER) 2914 int 2915 nfsrv_composefh(struct vnode *vp, nfsrvfh_t *nsfh, bool v3) 2916 { 2917 int error; 2918 size_t fhsize; 2919 2920 fhsize = NFSD_MAXFHSIZE; 2921 error = vfs_composefh(vp, (void *)NFSRVFH_DATA(nsfh), &fhsize); 2922 if (NFSX_FHTOOBIG_P(fhsize, v3)) { 2923 error = EOPNOTSUPP; 2924 } 2925 if (error != 0) { 2926 return error; 2927 } 2928 if (!v3 && fhsize < NFSX_V2FH) { 2929 memset((char *)NFSRVFH_DATA(nsfh) + fhsize, 0, 2930 NFSX_V2FH - fhsize); 2931 fhsize = NFSX_V2FH; 2932 } 2933 if ((fhsize % NFSX_UNSIGNED) != 0) { 2934 return EOPNOTSUPP; 2935 } 2936 nsfh->nsfh_size = fhsize; 2937 return 0; 2938 } 2939 2940 int 2941 nfsrv_comparefh(const nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 2942 { 2943 2944 if (NFSRVFH_SIZE(fh1) != NFSRVFH_SIZE(fh2)) { 2945 return NFSRVFH_SIZE(fh2) - NFSRVFH_SIZE(fh1); 2946 } 2947 return memcmp(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), NFSRVFH_SIZE(fh1)); 2948 } 2949 2950 void 2951 nfsrv_copyfh(nfsrvfh_t *fh1, const nfsrvfh_t *fh2) 2952 { 2953 size_t size; 2954 2955 fh1->nsfh_size = size = NFSRVFH_SIZE(fh2); 2956 memcpy(NFSRVFH_DATA(fh1), NFSRVFH_DATA(fh2), size); 2957 } 2958 #endif /* defined(NFSSERVER) */ 2959 2960 #if defined(NFS) 2961 /* 2962 * Set the attribute timeout based on how recently the file has been modified. 2963 */ 2964 2965 time_t 2966 nfs_attrtimeo(struct nfsmount *nmp, struct nfsnode *np) 2967 { 2968 time_t timeo; 2969 2970 if ((nmp->nm_flag & NFSMNT_NOAC) != 0) 2971 return 0; 2972 2973 if (((np)->n_flag & NMODIFIED) != 0) 2974 return NFS_MINATTRTIMO; 2975 2976 timeo = (time_second - np->n_mtime.tv_sec) / 10; 2977 timeo = max(timeo, NFS_MINATTRTIMO); 2978 timeo = min(timeo, NFS_MAXATTRTIMO); 2979 return timeo; 2980 } 2981 #endif /* defined(NFS) */ 2982
Indexes created Thu Oct 02 14:10:14 GMT 2025