nfs_subs.c revision 1.131
1 /* $NetBSD: nfs_subs.c,v 1.131 2004/03/12 16:52:37 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 1.131 2004/03/12 16:52:37 yamt Exp $"); 74 75 #include "fs_nfs.h" 76 #include "opt_nfs.h" 77 #include "opt_nfsserver.h" 78 #include "opt_iso.h" 79 #include "opt_inet.h" 80 81 /* 82 * These functions support the macros and help fiddle mbuf chains for 83 * the nfs op functions. They do things like create the rpc header and 84 * copy data between mbuf chains and uio lists. 85 */ 86 #include <sys/param.h> 87 #include <sys/proc.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/mount.h> 91 #include <sys/vnode.h> 92 #include <sys/namei.h> 93 #include <sys/mbuf.h> 94 #include <sys/socket.h> 95 #include <sys/stat.h> 96 #include <sys/malloc.h> 97 #include <sys/filedesc.h> 98 #include <sys/time.h> 99 #include <sys/dirent.h> 100 101 #include <uvm/uvm_extern.h> 102 103 #include <nfs/rpcv2.h> 104 #include <nfs/nfsproto.h> 105 #include <nfs/nfsnode.h> 106 #include <nfs/nfs.h> 107 #include <nfs/xdr_subs.h> 108 #include <nfs/nfsm_subs.h> 109 #include <nfs/nfsmount.h> 110 #include <nfs/nqnfs.h> 111 #include <nfs/nfsrtt.h> 112 #include <nfs/nfs_var.h> 113 114 #include <miscfs/specfs/specdev.h> 115 116 #include <netinet/in.h> 117 #ifdef ISO 118 #include <netiso/iso.h> 119 #endif 120 121 /* 122 * Data items converted to xdr at startup, since they are constant 123 * This is kinda hokey, but may save a little time doing byte swaps 124 */ 125 u_int32_t nfs_xdrneg1; 126 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 127 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 128 rpc_auth_kerb; 129 u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 130 131 /* And other global data */ 132 const nfstype nfsv2_type[9] = 133 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, NFCHR, NFNON }; 134 const nfstype nfsv3_type[9] = 135 { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, NFFIFO, NFNON }; 136 const enum vtype nv2tov_type[8] = 137 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 138 const enum vtype nv3tov_type[8] = 139 { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 140 int nfs_ticks; 141 int nfs_commitsize; 142 143 MALLOC_DEFINE(M_NFSDIROFF, "NFS diroff", "NFS directory cookies"); 144 145 /* NFS client/server stats. */ 146 struct nfsstats nfsstats; 147 148 /* 149 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 150 */ 151 const int nfsv3_procid[NFS_NPROCS] = { 152 NFSPROC_NULL, 153 NFSPROC_GETATTR, 154 NFSPROC_SETATTR, 155 NFSPROC_NOOP, 156 NFSPROC_LOOKUP, 157 NFSPROC_READLINK, 158 NFSPROC_READ, 159 NFSPROC_NOOP, 160 NFSPROC_WRITE, 161 NFSPROC_CREATE, 162 NFSPROC_REMOVE, 163 NFSPROC_RENAME, 164 NFSPROC_LINK, 165 NFSPROC_SYMLINK, 166 NFSPROC_MKDIR, 167 NFSPROC_RMDIR, 168 NFSPROC_READDIR, 169 NFSPROC_FSSTAT, 170 NFSPROC_NOOP, 171 NFSPROC_NOOP, 172 NFSPROC_NOOP, 173 NFSPROC_NOOP, 174 NFSPROC_NOOP, 175 NFSPROC_NOOP, 176 NFSPROC_NOOP, 177 NFSPROC_NOOP 178 }; 179 180 /* 181 * and the reverse mapping from generic to Version 2 procedure numbers 182 */ 183 const int nfsv2_procid[NFS_NPROCS] = { 184 NFSV2PROC_NULL, 185 NFSV2PROC_GETATTR, 186 NFSV2PROC_SETATTR, 187 NFSV2PROC_LOOKUP, 188 NFSV2PROC_NOOP, 189 NFSV2PROC_READLINK, 190 NFSV2PROC_READ, 191 NFSV2PROC_WRITE, 192 NFSV2PROC_CREATE, 193 NFSV2PROC_MKDIR, 194 NFSV2PROC_SYMLINK, 195 NFSV2PROC_CREATE, 196 NFSV2PROC_REMOVE, 197 NFSV2PROC_RMDIR, 198 NFSV2PROC_RENAME, 199 NFSV2PROC_LINK, 200 NFSV2PROC_READDIR, 201 NFSV2PROC_NOOP, 202 NFSV2PROC_STATFS, 203 NFSV2PROC_NOOP, 204 NFSV2PROC_NOOP, 205 NFSV2PROC_NOOP, 206 NFSV2PROC_NOOP, 207 NFSV2PROC_NOOP, 208 NFSV2PROC_NOOP, 209 NFSV2PROC_NOOP, 210 }; 211 212 /* 213 * Maps errno values to nfs error numbers. 214 * Use NFSERR_IO as the catch all for ones not specifically defined in 215 * RFC 1094. 216 */ 217 static const u_char nfsrv_v2errmap[ELAST] = { 218 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 219 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 220 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 221 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 222 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 223 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 229 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 230 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 231 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 232 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 233 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 234 NFSERR_IO, NFSERR_IO, 235 }; 236 237 /* 238 * Maps errno values to nfs error numbers. 239 * Although it is not obvious whether or not NFS clients really care if 240 * a returned error value is in the specified list for the procedure, the 241 * safest thing to do is filter them appropriately. For Version 2, the 242 * X/Open XNFS document is the only specification that defines error values 243 * for each RPC (The RFC simply lists all possible error values for all RPCs), 244 * so I have decided to not do this for Version 2. 245 * The first entry is the default error return and the rest are the valid 246 * errors for that RPC in increasing numeric order. 247 */ 248 static const short nfsv3err_null[] = { 249 0, 250 0, 251 }; 252 253 static const short nfsv3err_getattr[] = { 254 NFSERR_IO, 255 NFSERR_IO, 256 NFSERR_STALE, 257 NFSERR_BADHANDLE, 258 NFSERR_SERVERFAULT, 259 0, 260 }; 261 262 static const short nfsv3err_setattr[] = { 263 NFSERR_IO, 264 NFSERR_PERM, 265 NFSERR_IO, 266 NFSERR_ACCES, 267 NFSERR_INVAL, 268 NFSERR_NOSPC, 269 NFSERR_ROFS, 270 NFSERR_DQUOT, 271 NFSERR_STALE, 272 NFSERR_BADHANDLE, 273 NFSERR_NOT_SYNC, 274 NFSERR_SERVERFAULT, 275 0, 276 }; 277 278 static const short nfsv3err_lookup[] = { 279 NFSERR_IO, 280 NFSERR_NOENT, 281 NFSERR_IO, 282 NFSERR_ACCES, 283 NFSERR_NOTDIR, 284 NFSERR_NAMETOL, 285 NFSERR_STALE, 286 NFSERR_BADHANDLE, 287 NFSERR_SERVERFAULT, 288 0, 289 }; 290 291 static const short nfsv3err_access[] = { 292 NFSERR_IO, 293 NFSERR_IO, 294 NFSERR_STALE, 295 NFSERR_BADHANDLE, 296 NFSERR_SERVERFAULT, 297 0, 298 }; 299 300 static const short nfsv3err_readlink[] = { 301 NFSERR_IO, 302 NFSERR_IO, 303 NFSERR_ACCES, 304 NFSERR_INVAL, 305 NFSERR_STALE, 306 NFSERR_BADHANDLE, 307 NFSERR_NOTSUPP, 308 NFSERR_SERVERFAULT, 309 0, 310 }; 311 312 static const short nfsv3err_read[] = { 313 NFSERR_IO, 314 NFSERR_IO, 315 NFSERR_NXIO, 316 NFSERR_ACCES, 317 NFSERR_INVAL, 318 NFSERR_STALE, 319 NFSERR_BADHANDLE, 320 NFSERR_SERVERFAULT, 321 NFSERR_JUKEBOX, 322 0, 323 }; 324 325 static const short nfsv3err_write[] = { 326 NFSERR_IO, 327 NFSERR_IO, 328 NFSERR_ACCES, 329 NFSERR_INVAL, 330 NFSERR_FBIG, 331 NFSERR_NOSPC, 332 NFSERR_ROFS, 333 NFSERR_DQUOT, 334 NFSERR_STALE, 335 NFSERR_BADHANDLE, 336 NFSERR_SERVERFAULT, 337 NFSERR_JUKEBOX, 338 0, 339 }; 340 341 static const short nfsv3err_create[] = { 342 NFSERR_IO, 343 NFSERR_IO, 344 NFSERR_ACCES, 345 NFSERR_EXIST, 346 NFSERR_NOTDIR, 347 NFSERR_NOSPC, 348 NFSERR_ROFS, 349 NFSERR_NAMETOL, 350 NFSERR_DQUOT, 351 NFSERR_STALE, 352 NFSERR_BADHANDLE, 353 NFSERR_NOTSUPP, 354 NFSERR_SERVERFAULT, 355 0, 356 }; 357 358 static const short nfsv3err_mkdir[] = { 359 NFSERR_IO, 360 NFSERR_IO, 361 NFSERR_ACCES, 362 NFSERR_EXIST, 363 NFSERR_NOTDIR, 364 NFSERR_NOSPC, 365 NFSERR_ROFS, 366 NFSERR_NAMETOL, 367 NFSERR_DQUOT, 368 NFSERR_STALE, 369 NFSERR_BADHANDLE, 370 NFSERR_NOTSUPP, 371 NFSERR_SERVERFAULT, 372 0, 373 }; 374 375 static const short nfsv3err_symlink[] = { 376 NFSERR_IO, 377 NFSERR_IO, 378 NFSERR_ACCES, 379 NFSERR_EXIST, 380 NFSERR_NOTDIR, 381 NFSERR_NOSPC, 382 NFSERR_ROFS, 383 NFSERR_NAMETOL, 384 NFSERR_DQUOT, 385 NFSERR_STALE, 386 NFSERR_BADHANDLE, 387 NFSERR_NOTSUPP, 388 NFSERR_SERVERFAULT, 389 0, 390 }; 391 392 static const short nfsv3err_mknod[] = { 393 NFSERR_IO, 394 NFSERR_IO, 395 NFSERR_ACCES, 396 NFSERR_EXIST, 397 NFSERR_NOTDIR, 398 NFSERR_NOSPC, 399 NFSERR_ROFS, 400 NFSERR_NAMETOL, 401 NFSERR_DQUOT, 402 NFSERR_STALE, 403 NFSERR_BADHANDLE, 404 NFSERR_NOTSUPP, 405 NFSERR_SERVERFAULT, 406 NFSERR_BADTYPE, 407 0, 408 }; 409 410 static const short nfsv3err_remove[] = { 411 NFSERR_IO, 412 NFSERR_NOENT, 413 NFSERR_IO, 414 NFSERR_ACCES, 415 NFSERR_NOTDIR, 416 NFSERR_ROFS, 417 NFSERR_NAMETOL, 418 NFSERR_STALE, 419 NFSERR_BADHANDLE, 420 NFSERR_SERVERFAULT, 421 0, 422 }; 423 424 static const short nfsv3err_rmdir[] = { 425 NFSERR_IO, 426 NFSERR_NOENT, 427 NFSERR_IO, 428 NFSERR_ACCES, 429 NFSERR_EXIST, 430 NFSERR_NOTDIR, 431 NFSERR_INVAL, 432 NFSERR_ROFS, 433 NFSERR_NAMETOL, 434 NFSERR_NOTEMPTY, 435 NFSERR_STALE, 436 NFSERR_BADHANDLE, 437 NFSERR_NOTSUPP, 438 NFSERR_SERVERFAULT, 439 0, 440 }; 441 442 static const short nfsv3err_rename[] = { 443 NFSERR_IO, 444 NFSERR_NOENT, 445 NFSERR_IO, 446 NFSERR_ACCES, 447 NFSERR_EXIST, 448 NFSERR_XDEV, 449 NFSERR_NOTDIR, 450 NFSERR_ISDIR, 451 NFSERR_INVAL, 452 NFSERR_NOSPC, 453 NFSERR_ROFS, 454 NFSERR_MLINK, 455 NFSERR_NAMETOL, 456 NFSERR_NOTEMPTY, 457 NFSERR_DQUOT, 458 NFSERR_STALE, 459 NFSERR_BADHANDLE, 460 NFSERR_NOTSUPP, 461 NFSERR_SERVERFAULT, 462 0, 463 }; 464 465 static const short nfsv3err_link[] = { 466 NFSERR_IO, 467 NFSERR_IO, 468 NFSERR_ACCES, 469 NFSERR_EXIST, 470 NFSERR_XDEV, 471 NFSERR_NOTDIR, 472 NFSERR_INVAL, 473 NFSERR_NOSPC, 474 NFSERR_ROFS, 475 NFSERR_MLINK, 476 NFSERR_NAMETOL, 477 NFSERR_DQUOT, 478 NFSERR_STALE, 479 NFSERR_BADHANDLE, 480 NFSERR_NOTSUPP, 481 NFSERR_SERVERFAULT, 482 0, 483 }; 484 485 static const short nfsv3err_readdir[] = { 486 NFSERR_IO, 487 NFSERR_IO, 488 NFSERR_ACCES, 489 NFSERR_NOTDIR, 490 NFSERR_STALE, 491 NFSERR_BADHANDLE, 492 NFSERR_BAD_COOKIE, 493 NFSERR_TOOSMALL, 494 NFSERR_SERVERFAULT, 495 0, 496 }; 497 498 static const short nfsv3err_readdirplus[] = { 499 NFSERR_IO, 500 NFSERR_IO, 501 NFSERR_ACCES, 502 NFSERR_NOTDIR, 503 NFSERR_STALE, 504 NFSERR_BADHANDLE, 505 NFSERR_BAD_COOKIE, 506 NFSERR_NOTSUPP, 507 NFSERR_TOOSMALL, 508 NFSERR_SERVERFAULT, 509 0, 510 }; 511 512 static const short nfsv3err_fsstat[] = { 513 NFSERR_IO, 514 NFSERR_IO, 515 NFSERR_STALE, 516 NFSERR_BADHANDLE, 517 NFSERR_SERVERFAULT, 518 0, 519 }; 520 521 static const short nfsv3err_fsinfo[] = { 522 NFSERR_STALE, 523 NFSERR_STALE, 524 NFSERR_BADHANDLE, 525 NFSERR_SERVERFAULT, 526 0, 527 }; 528 529 static const short nfsv3err_pathconf[] = { 530 NFSERR_STALE, 531 NFSERR_STALE, 532 NFSERR_BADHANDLE, 533 NFSERR_SERVERFAULT, 534 0, 535 }; 536 537 static const short nfsv3err_commit[] = { 538 NFSERR_IO, 539 NFSERR_IO, 540 NFSERR_STALE, 541 NFSERR_BADHANDLE, 542 NFSERR_SERVERFAULT, 543 0, 544 }; 545 546 static const short * const nfsrv_v3errmap[] = { 547 nfsv3err_null, 548 nfsv3err_getattr, 549 nfsv3err_setattr, 550 nfsv3err_lookup, 551 nfsv3err_access, 552 nfsv3err_readlink, 553 nfsv3err_read, 554 nfsv3err_write, 555 nfsv3err_create, 556 nfsv3err_mkdir, 557 nfsv3err_symlink, 558 nfsv3err_mknod, 559 nfsv3err_remove, 560 nfsv3err_rmdir, 561 nfsv3err_rename, 562 nfsv3err_link, 563 nfsv3err_readdir, 564 nfsv3err_readdirplus, 565 nfsv3err_fsstat, 566 nfsv3err_fsinfo, 567 nfsv3err_pathconf, 568 nfsv3err_commit, 569 }; 570 571 extern struct nfsrtt nfsrtt; 572 extern time_t nqnfsstarttime; 573 extern int nqsrv_clockskew; 574 extern int nqsrv_writeslack; 575 extern int nqsrv_maxlease; 576 extern const int nqnfs_piggy[NFS_NPROCS]; 577 extern struct nfsnodehashhead *nfsnodehashtbl; 578 extern u_long nfsnodehash; 579 580 u_long nfsdirhashmask; 581 582 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 583 584 /* 585 * Create the header for an rpc request packet 586 * The hsiz is the size of the rest of the nfs request header. 587 * (just used to decide if a cluster is a good idea) 588 */ 589 struct mbuf * 590 nfsm_reqh(np, procid, hsiz, bposp) 591 struct nfsnode *np; 592 u_long procid; 593 int hsiz; 594 caddr_t *bposp; 595 { 596 struct mbuf *mb; 597 caddr_t bpos; 598 #ifndef NFS_V2_ONLY 599 struct nfsmount *nmp; 600 u_int32_t *tl; 601 int nqflag; 602 #endif 603 604 mb = m_get(M_WAIT, MT_DATA); 605 MCLAIM(mb, &nfs_mowner); 606 if (hsiz >= MINCLSIZE) 607 m_clget(mb, M_WAIT); 608 mb->m_len = 0; 609 bpos = mtod(mb, caddr_t); 610 611 #ifndef NFS_V2_ONLY 612 /* 613 * For NQNFS, add lease request. 614 */ 615 if (np) { 616 nmp = VFSTONFS(np->n_vnode->v_mount); 617 if (nmp->nm_flag & NFSMNT_NQNFS) { 618 nqflag = NQNFS_NEEDLEASE(np, procid); 619 if (nqflag) { 620 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 621 *tl++ = txdr_unsigned(nqflag); 622 *tl = txdr_unsigned(nmp->nm_leaseterm); 623 } else { 624 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 625 *tl = 0; 626 } 627 } 628 } 629 #endif 630 /* Finally, return values */ 631 *bposp = bpos; 632 return (mb); 633 } 634 635 /* 636 * Build the RPC header and fill in the authorization info. 637 * The authorization string argument is only used when the credentials 638 * come from outside of the kernel. 639 * Returns the head of the mbuf list. 640 */ 641 struct mbuf * 642 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 643 verf_str, mrest, mrest_len, mbp, xidp) 644 struct ucred *cr; 645 int nmflag; 646 int procid; 647 int auth_type; 648 int auth_len; 649 char *auth_str; 650 int verf_len; 651 char *verf_str; 652 struct mbuf *mrest; 653 int mrest_len; 654 struct mbuf **mbp; 655 u_int32_t *xidp; 656 { 657 struct mbuf *mb; 658 u_int32_t *tl; 659 caddr_t bpos; 660 int i; 661 struct mbuf *mreq; 662 int siz, grpsiz, authsiz; 663 664 authsiz = nfsm_rndup(auth_len); 665 mb = m_gethdr(M_WAIT, MT_DATA); 666 MCLAIM(mb, &nfs_mowner); 667 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 668 m_clget(mb, M_WAIT); 669 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 670 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 671 } else { 672 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 673 } 674 mb->m_len = 0; 675 mreq = mb; 676 bpos = mtod(mb, caddr_t); 677 678 /* 679 * First the RPC header. 680 */ 681 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 682 683 *tl++ = *xidp = nfs_getxid(); 684 *tl++ = rpc_call; 685 *tl++ = rpc_vers; 686 if (nmflag & NFSMNT_NQNFS) { 687 *tl++ = txdr_unsigned(NQNFS_PROG); 688 *tl++ = txdr_unsigned(NQNFS_VER3); 689 } else { 690 *tl++ = txdr_unsigned(NFS_PROG); 691 if (nmflag & NFSMNT_NFSV3) 692 *tl++ = txdr_unsigned(NFS_VER3); 693 else 694 *tl++ = txdr_unsigned(NFS_VER2); 695 } 696 if (nmflag & NFSMNT_NFSV3) 697 *tl++ = txdr_unsigned(procid); 698 else 699 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 700 701 /* 702 * And then the authorization cred. 703 */ 704 *tl++ = txdr_unsigned(auth_type); 705 *tl = txdr_unsigned(authsiz); 706 switch (auth_type) { 707 case RPCAUTH_UNIX: 708 nfsm_build(tl, u_int32_t *, auth_len); 709 *tl++ = 0; /* stamp ?? */ 710 *tl++ = 0; /* NULL hostname */ 711 *tl++ = txdr_unsigned(cr->cr_uid); 712 *tl++ = txdr_unsigned(cr->cr_gid); 713 grpsiz = (auth_len >> 2) - 5; 714 *tl++ = txdr_unsigned(grpsiz); 715 for (i = 0; i < grpsiz; i++) 716 *tl++ = txdr_unsigned(cr->cr_groups[i]); 717 break; 718 case RPCAUTH_KERB4: 719 siz = auth_len; 720 while (siz > 0) { 721 if (M_TRAILINGSPACE(mb) == 0) { 722 struct mbuf *mb2; 723 mb2 = m_get(M_WAIT, MT_DATA); 724 MCLAIM(mb2, &nfs_mowner); 725 if (siz >= MINCLSIZE) 726 m_clget(mb2, M_WAIT); 727 mb->m_next = mb2; 728 mb = mb2; 729 mb->m_len = 0; 730 bpos = mtod(mb, caddr_t); 731 } 732 i = min(siz, M_TRAILINGSPACE(mb)); 733 memcpy(bpos, auth_str, i); 734 mb->m_len += i; 735 auth_str += i; 736 bpos += i; 737 siz -= i; 738 } 739 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 740 for (i = 0; i < siz; i++) 741 *bpos++ = '\0'; 742 mb->m_len += siz; 743 } 744 break; 745 }; 746 747 /* 748 * And the verifier... 749 */ 750 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 751 if (verf_str) { 752 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 753 *tl = txdr_unsigned(verf_len); 754 siz = verf_len; 755 while (siz > 0) { 756 if (M_TRAILINGSPACE(mb) == 0) { 757 struct mbuf *mb2; 758 mb2 = m_get(M_WAIT, MT_DATA); 759 MCLAIM(mb2, &nfs_mowner); 760 if (siz >= MINCLSIZE) 761 m_clget(mb2, M_WAIT); 762 mb->m_next = mb2; 763 mb = mb2; 764 mb->m_len = 0; 765 bpos = mtod(mb, caddr_t); 766 } 767 i = min(siz, M_TRAILINGSPACE(mb)); 768 memcpy(bpos, verf_str, i); 769 mb->m_len += i; 770 verf_str += i; 771 bpos += i; 772 siz -= i; 773 } 774 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 775 for (i = 0; i < siz; i++) 776 *bpos++ = '\0'; 777 mb->m_len += siz; 778 } 779 } else { 780 *tl++ = txdr_unsigned(RPCAUTH_NULL); 781 *tl = 0; 782 } 783 mb->m_next = mrest; 784 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 785 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 786 *mbp = mb; 787 return (mreq); 788 } 789 790 /* 791 * copies mbuf chain to the uio scatter/gather list 792 */ 793 int 794 nfsm_mbuftouio(mrep, uiop, siz, dpos) 795 struct mbuf **mrep; 796 struct uio *uiop; 797 int siz; 798 caddr_t *dpos; 799 { 800 char *mbufcp, *uiocp; 801 int xfer, left, len; 802 struct mbuf *mp; 803 long uiosiz, rem; 804 int error = 0; 805 806 mp = *mrep; 807 mbufcp = *dpos; 808 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 809 rem = nfsm_rndup(siz)-siz; 810 while (siz > 0) { 811 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 812 return (EFBIG); 813 left = uiop->uio_iov->iov_len; 814 uiocp = uiop->uio_iov->iov_base; 815 if (left > siz) 816 left = siz; 817 uiosiz = left; 818 while (left > 0) { 819 while (len == 0) { 820 mp = mp->m_next; 821 if (mp == NULL) 822 return (EBADRPC); 823 mbufcp = mtod(mp, caddr_t); 824 len = mp->m_len; 825 } 826 xfer = (left > len) ? len : left; 827 #ifdef notdef 828 /* Not Yet.. */ 829 if (uiop->uio_iov->iov_op != NULL) 830 (*(uiop->uio_iov->iov_op)) 831 (mbufcp, uiocp, xfer); 832 else 833 #endif 834 if (uiop->uio_segflg == UIO_SYSSPACE) 835 memcpy(uiocp, mbufcp, xfer); 836 else 837 copyout(mbufcp, uiocp, xfer); 838 left -= xfer; 839 len -= xfer; 840 mbufcp += xfer; 841 uiocp += xfer; 842 uiop->uio_offset += xfer; 843 uiop->uio_resid -= xfer; 844 } 845 if (uiop->uio_iov->iov_len <= siz) { 846 uiop->uio_iovcnt--; 847 uiop->uio_iov++; 848 } else { 849 uiop->uio_iov->iov_base = 850 (caddr_t)uiop->uio_iov->iov_base + uiosiz; 851 uiop->uio_iov->iov_len -= uiosiz; 852 } 853 siz -= uiosiz; 854 } 855 *dpos = mbufcp; 856 *mrep = mp; 857 if (rem > 0) { 858 if (len < rem) 859 error = nfs_adv(mrep, dpos, rem, len); 860 else 861 *dpos += rem; 862 } 863 return (error); 864 } 865 866 /* 867 * copies a uio scatter/gather list to an mbuf chain. 868 * NOTE: can ony handle iovcnt == 1 869 */ 870 int 871 nfsm_uiotombuf(uiop, mq, siz, bpos) 872 struct uio *uiop; 873 struct mbuf **mq; 874 int siz; 875 caddr_t *bpos; 876 { 877 char *uiocp; 878 struct mbuf *mp, *mp2; 879 int xfer, left, mlen; 880 int uiosiz, clflg, rem; 881 char *cp; 882 883 #ifdef DIAGNOSTIC 884 if (uiop->uio_iovcnt != 1) 885 panic("nfsm_uiotombuf: iovcnt != 1"); 886 #endif 887 888 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 889 clflg = 1; 890 else 891 clflg = 0; 892 rem = nfsm_rndup(siz)-siz; 893 mp = mp2 = *mq; 894 while (siz > 0) { 895 left = uiop->uio_iov->iov_len; 896 uiocp = uiop->uio_iov->iov_base; 897 if (left > siz) 898 left = siz; 899 uiosiz = left; 900 while (left > 0) { 901 mlen = M_TRAILINGSPACE(mp); 902 if (mlen == 0) { 903 mp = m_get(M_WAIT, MT_DATA); 904 MCLAIM(mp, &nfs_mowner); 905 if (clflg) 906 m_clget(mp, M_WAIT); 907 mp->m_len = 0; 908 mp2->m_next = mp; 909 mp2 = mp; 910 mlen = M_TRAILINGSPACE(mp); 911 } 912 xfer = (left > mlen) ? mlen : left; 913 #ifdef notdef 914 /* Not Yet.. */ 915 if (uiop->uio_iov->iov_op != NULL) 916 (*(uiop->uio_iov->iov_op)) 917 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 918 else 919 #endif 920 if (uiop->uio_segflg == UIO_SYSSPACE) 921 memcpy(mtod(mp, caddr_t)+mp->m_len, uiocp, xfer); 922 else 923 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 924 mp->m_len += xfer; 925 left -= xfer; 926 uiocp += xfer; 927 uiop->uio_offset += xfer; 928 uiop->uio_resid -= xfer; 929 } 930 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 931 uiosiz; 932 uiop->uio_iov->iov_len -= uiosiz; 933 siz -= uiosiz; 934 } 935 if (rem > 0) { 936 if (rem > M_TRAILINGSPACE(mp)) { 937 mp = m_get(M_WAIT, MT_DATA); 938 MCLAIM(mp, &nfs_mowner); 939 mp->m_len = 0; 940 mp2->m_next = mp; 941 } 942 cp = mtod(mp, caddr_t)+mp->m_len; 943 for (left = 0; left < rem; left++) 944 *cp++ = '\0'; 945 mp->m_len += rem; 946 *bpos = cp; 947 } else 948 *bpos = mtod(mp, caddr_t)+mp->m_len; 949 *mq = mp; 950 return (0); 951 } 952 953 /* 954 * Get at least "siz" bytes of correctly aligned data. 955 * When called the mbuf pointers are not necessarily correct, 956 * dsosp points to what ought to be in m_data and left contains 957 * what ought to be in m_len. 958 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 959 * cases. (The macros use the vars. dpos and dpos2) 960 */ 961 int 962 nfsm_disct(mdp, dposp, siz, left, cp2) 963 struct mbuf **mdp; 964 caddr_t *dposp; 965 int siz; 966 int left; 967 caddr_t *cp2; 968 { 969 struct mbuf *m1, *m2; 970 struct mbuf *havebuf = NULL; 971 caddr_t src = *dposp; 972 caddr_t dst; 973 int len; 974 975 #ifdef DEBUG 976 if (left < 0) 977 panic("nfsm_disct: left < 0"); 978 #endif 979 m1 = *mdp; 980 /* 981 * Skip through the mbuf chain looking for an mbuf with 982 * some data. If the first mbuf found has enough data 983 * and it is correctly aligned return it. 984 */ 985 while (left == 0) { 986 havebuf = m1; 987 *mdp = m1 = m1->m_next; 988 if (m1 == NULL) 989 return (EBADRPC); 990 src = mtod(m1, caddr_t); 991 left = m1->m_len; 992 /* 993 * If we start a new mbuf and it is big enough 994 * and correctly aligned just return it, don't 995 * do any pull up. 996 */ 997 if (left >= siz && nfsm_aligned(src)) { 998 *cp2 = src; 999 *dposp = src + siz; 1000 return (0); 1001 } 1002 } 1003 if (m1->m_flags & M_EXT) { 1004 if (havebuf) { 1005 /* If the first mbuf with data has external data 1006 * and there is a previous empty mbuf use it 1007 * to move the data into. 1008 */ 1009 m2 = m1; 1010 *mdp = m1 = havebuf; 1011 if (m1->m_flags & M_EXT) { 1012 MEXTREMOVE(m1); 1013 } 1014 } else { 1015 /* 1016 * If the first mbuf has a external data 1017 * and there is no previous empty mbuf 1018 * allocate a new mbuf and move the external 1019 * data to the new mbuf. Also make the first 1020 * mbuf look empty. 1021 */ 1022 m2 = m_get(M_WAIT, MT_DATA); 1023 m2->m_ext = m1->m_ext; 1024 m2->m_data = src; 1025 m2->m_len = left; 1026 MCLADDREFERENCE(m1, m2); 1027 MEXTREMOVE(m1); 1028 m2->m_next = m1->m_next; 1029 m1->m_next = m2; 1030 } 1031 m1->m_len = 0; 1032 if (m1->m_flags & M_PKTHDR) 1033 dst = m1->m_pktdat; 1034 else 1035 dst = m1->m_dat; 1036 m1->m_data = dst; 1037 } else { 1038 /* 1039 * If the first mbuf has no external data 1040 * move the data to the front of the mbuf. 1041 */ 1042 if (m1->m_flags & M_PKTHDR) 1043 dst = m1->m_pktdat; 1044 else 1045 dst = m1->m_dat; 1046 m1->m_data = dst; 1047 if (dst != src) 1048 memmove(dst, src, left); 1049 dst += left; 1050 m1->m_len = left; 1051 m2 = m1->m_next; 1052 } 1053 *cp2 = m1->m_data; 1054 *dposp = mtod(m1, caddr_t) + siz; 1055 /* 1056 * Loop through mbufs pulling data up into first mbuf until 1057 * the first mbuf is full or there is no more data to 1058 * pullup. 1059 */ 1060 while ((len = M_TRAILINGSPACE(m1)) != 0 && m2) { 1061 if ((len = min(len, m2->m_len)) != 0) 1062 memcpy(dst, m2->m_data, len); 1063 m1->m_len += len; 1064 dst += len; 1065 m2->m_data += len; 1066 m2->m_len -= len; 1067 m2 = m2->m_next; 1068 } 1069 if (m1->m_len < siz) 1070 return (EBADRPC); 1071 return (0); 1072 } 1073 1074 /* 1075 * Advance the position in the mbuf chain. 1076 */ 1077 int 1078 nfs_adv(mdp, dposp, offs, left) 1079 struct mbuf **mdp; 1080 caddr_t *dposp; 1081 int offs; 1082 int left; 1083 { 1084 struct mbuf *m; 1085 int s; 1086 1087 m = *mdp; 1088 s = left; 1089 while (s < offs) { 1090 offs -= s; 1091 m = m->m_next; 1092 if (m == NULL) 1093 return (EBADRPC); 1094 s = m->m_len; 1095 } 1096 *mdp = m; 1097 *dposp = mtod(m, caddr_t)+offs; 1098 return (0); 1099 } 1100 1101 /* 1102 * Copy a string into mbufs for the hard cases... 1103 */ 1104 int 1105 nfsm_strtmbuf(mb, bpos, cp, siz) 1106 struct mbuf **mb; 1107 char **bpos; 1108 const char *cp; 1109 long siz; 1110 { 1111 struct mbuf *m1 = NULL, *m2; 1112 long left, xfer, len, tlen; 1113 u_int32_t *tl; 1114 int putsize; 1115 1116 putsize = 1; 1117 m2 = *mb; 1118 left = M_TRAILINGSPACE(m2); 1119 if (left > 0) { 1120 tl = ((u_int32_t *)(*bpos)); 1121 *tl++ = txdr_unsigned(siz); 1122 putsize = 0; 1123 left -= NFSX_UNSIGNED; 1124 m2->m_len += NFSX_UNSIGNED; 1125 if (left > 0) { 1126 memcpy((caddr_t) tl, cp, left); 1127 siz -= left; 1128 cp += left; 1129 m2->m_len += left; 1130 left = 0; 1131 } 1132 } 1133 /* Loop around adding mbufs */ 1134 while (siz > 0) { 1135 m1 = m_get(M_WAIT, MT_DATA); 1136 MCLAIM(m1, &nfs_mowner); 1137 if (siz > MLEN) 1138 m_clget(m1, M_WAIT); 1139 m1->m_len = NFSMSIZ(m1); 1140 m2->m_next = m1; 1141 m2 = m1; 1142 tl = mtod(m1, u_int32_t *); 1143 tlen = 0; 1144 if (putsize) { 1145 *tl++ = txdr_unsigned(siz); 1146 m1->m_len -= NFSX_UNSIGNED; 1147 tlen = NFSX_UNSIGNED; 1148 putsize = 0; 1149 } 1150 if (siz < m1->m_len) { 1151 len = nfsm_rndup(siz); 1152 xfer = siz; 1153 if (xfer < len) 1154 *(tl+(xfer>>2)) = 0; 1155 } else { 1156 xfer = len = m1->m_len; 1157 } 1158 memcpy((caddr_t) tl, cp, xfer); 1159 m1->m_len = len+tlen; 1160 siz -= xfer; 1161 cp += xfer; 1162 } 1163 *mb = m1; 1164 *bpos = mtod(m1, caddr_t)+m1->m_len; 1165 return (0); 1166 } 1167 1168 /* 1169 * Directory caching routines. They work as follows: 1170 * - a cache is maintained per VDIR nfsnode. 1171 * - for each offset cookie that is exported to userspace, and can 1172 * thus be thrown back at us as an offset to VOP_READDIR, store 1173 * information in the cache. 1174 * - cached are: 1175 * - cookie itself 1176 * - blocknumber (essentially just a search key in the buffer cache) 1177 * - entry number in block. 1178 * - offset cookie of block in which this entry is stored 1179 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1180 * - entries are looked up in a hash table 1181 * - also maintained is an LRU list of entries, used to determine 1182 * which ones to delete if the cache grows too large. 1183 * - if 32 <-> 64 translation mode is requested for a filesystem, 1184 * the cache also functions as a translation table 1185 * - in the translation case, invalidating the cache does not mean 1186 * flushing it, but just marking entries as invalid, except for 1187 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1188 * still be able to use the cache as a translation table. 1189 * - 32 bit cookies are uniquely created by combining the hash table 1190 * entry value, and one generation count per hash table entry, 1191 * incremented each time an entry is appended to the chain. 1192 * - the cache is invalidated each time a direcory is modified 1193 * - sanity checks are also done; if an entry in a block turns 1194 * out not to have a matching cookie, the cache is invalidated 1195 * and a new block starting from the wanted offset is fetched from 1196 * the server. 1197 * - directory entries as read from the server are extended to contain 1198 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1199 * the cache and exporting them to userspace through the cookie 1200 * argument to VOP_READDIR. 1201 */ 1202 1203 u_long 1204 nfs_dirhash(off) 1205 off_t off; 1206 { 1207 int i; 1208 char *cp = (char *)&off; 1209 u_long sum = 0L; 1210 1211 for (i = 0 ; i < sizeof (off); i++) 1212 sum += *cp++; 1213 1214 return sum; 1215 } 1216 1217 void 1218 nfs_initdircache(vp) 1219 struct vnode *vp; 1220 { 1221 struct nfsnode *np = VTONFS(vp); 1222 1223 KASSERT(np->n_dircache == NULL); 1224 1225 np->n_dircachesize = 0; 1226 np->n_dblkno = 1; 1227 np->n_dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, M_NFSDIROFF, 1228 M_WAITOK, &nfsdirhashmask); 1229 TAILQ_INIT(&np->n_dirchain); 1230 } 1231 1232 void 1233 nfs_initdirxlatecookie(vp) 1234 struct vnode *vp; 1235 { 1236 struct nfsnode *np = VTONFS(vp); 1237 1238 KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1239 KASSERT(np->n_dirgens == NULL); 1240 1241 MALLOC(np->n_dirgens, unsigned *, 1242 NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, M_WAITOK); 1243 memset((caddr_t)np->n_dirgens, 0, NFS_DIRHASHSIZ * sizeof (unsigned)); 1244 } 1245 1246 static struct nfsdircache dzero = {0, 0, {0, 0}, {0, 0}, 0, 0, 0}; 1247 1248 struct nfsdircache * 1249 nfs_searchdircache(vp, off, do32, hashent) 1250 struct vnode *vp; 1251 off_t off; 1252 int do32; 1253 int *hashent; 1254 { 1255 struct nfsdirhashhead *ndhp; 1256 struct nfsdircache *ndp = NULL; 1257 struct nfsnode *np = VTONFS(vp); 1258 unsigned ent; 1259 1260 /* 1261 * Zero is always a valid cookie. 1262 */ 1263 if (off == 0) 1264 return &dzero; 1265 1266 /* 1267 * We use a 32bit cookie as search key, directly reconstruct 1268 * the hashentry. Else use the hashfunction. 1269 */ 1270 if (do32) { 1271 ent = (u_int32_t)off >> 24; 1272 if (ent >= NFS_DIRHASHSIZ) 1273 return NULL; 1274 ndhp = &np->n_dircache[ent]; 1275 } else { 1276 ndhp = NFSDIRHASH(np, off); 1277 } 1278 1279 if (hashent) 1280 *hashent = (int)(ndhp - np->n_dircache); 1281 if (do32) { 1282 LIST_FOREACH(ndp, ndhp, dc_hash) { 1283 if (ndp->dc_cookie32 == (u_int32_t)off) { 1284 /* 1285 * An invalidated entry will become the 1286 * start of a new block fetched from 1287 * the server. 1288 */ 1289 if (ndp->dc_blkno == -1) { 1290 ndp->dc_blkcookie = ndp->dc_cookie; 1291 ndp->dc_blkno = np->n_dblkno++; 1292 ndp->dc_entry = 0; 1293 } 1294 break; 1295 } 1296 } 1297 } else { 1298 LIST_FOREACH(ndp, ndhp, dc_hash) { 1299 if (ndp->dc_cookie == off) 1300 break; 1301 } 1302 } 1303 return ndp; 1304 } 1305 1306 1307 struct nfsdircache * 1308 nfs_enterdircache(vp, off, blkoff, en, blkno) 1309 struct vnode *vp; 1310 off_t off, blkoff; 1311 int en; 1312 daddr_t blkno; 1313 { 1314 struct nfsnode *np = VTONFS(vp); 1315 struct nfsdirhashhead *ndhp; 1316 struct nfsdircache *ndp = NULL, *first; 1317 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1318 int hashent, gen, overwrite; 1319 1320 if (!np->n_dircache) 1321 /* 1322 * XXX would like to do this in nfs_nget but vtype 1323 * isn't known at that time. 1324 */ 1325 nfs_initdircache(vp); 1326 1327 if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1328 nfs_initdirxlatecookie(vp); 1329 1330 /* 1331 * XXX refuse entries for offset 0. amd(8) erroneously sets 1332 * cookie 0 for the '.' entry, making this necessary. This 1333 * isn't so bad, as 0 is a special case anyway. 1334 */ 1335 if (off == 0) 1336 return &dzero; 1337 1338 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1339 1340 if (ndp && ndp->dc_blkno != -1) { 1341 /* 1342 * Overwriting an old entry. Check if it's the same. 1343 * If so, just return. If not, remove the old entry. 1344 */ 1345 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1346 return ndp; 1347 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1348 LIST_REMOVE(ndp, dc_hash); 1349 FREE(ndp, M_NFSDIROFF); 1350 ndp = 0; 1351 } 1352 1353 ndhp = &np->n_dircache[hashent]; 1354 1355 if (!ndp) { 1356 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, 1357 M_WAITOK); 1358 overwrite = 0; 1359 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1360 /* 1361 * We're allocating a new entry, so bump the 1362 * generation number. 1363 */ 1364 gen = ++np->n_dirgens[hashent]; 1365 if (gen == 0) { 1366 np->n_dirgens[hashent]++; 1367 gen++; 1368 } 1369 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1370 } 1371 } else 1372 overwrite = 1; 1373 1374 /* 1375 * If the entry number is 0, we are at the start of a new block, so 1376 * allocate a new blocknumber. 1377 */ 1378 if (en == 0) 1379 ndp->dc_blkno = np->n_dblkno++; 1380 else 1381 ndp->dc_blkno = blkno; 1382 1383 ndp->dc_cookie = off; 1384 ndp->dc_blkcookie = blkoff; 1385 ndp->dc_entry = en; 1386 1387 if (overwrite) 1388 return ndp; 1389 1390 /* 1391 * If the maximum directory cookie cache size has been reached 1392 * for this node, take one off the front. The idea is that 1393 * directories are typically read front-to-back once, so that 1394 * the oldest entries can be thrown away without much performance 1395 * loss. 1396 */ 1397 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1398 first = TAILQ_FIRST(&np->n_dirchain); 1399 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1400 LIST_REMOVE(first, dc_hash); 1401 FREE(first, M_NFSDIROFF); 1402 } else 1403 np->n_dircachesize++; 1404 1405 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1406 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1407 return ndp; 1408 } 1409 1410 void 1411 nfs_invaldircache(vp, forcefree) 1412 struct vnode *vp; 1413 int forcefree; 1414 { 1415 struct nfsnode *np = VTONFS(vp); 1416 struct nfsdircache *ndp = NULL; 1417 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1418 1419 #ifdef DIAGNOSTIC 1420 if (vp->v_type != VDIR) 1421 panic("nfs: invaldircache: not dir"); 1422 #endif 1423 1424 if (!np->n_dircache) 1425 return; 1426 1427 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1428 while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != 0) { 1429 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1430 LIST_REMOVE(ndp, dc_hash); 1431 FREE(ndp, M_NFSDIROFF); 1432 } 1433 np->n_dircachesize = 0; 1434 if (forcefree && np->n_dirgens) { 1435 FREE(np->n_dirgens, M_NFSDIROFF); 1436 np->n_dirgens = NULL; 1437 } 1438 } else { 1439 TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) { 1440 ndp->dc_blkno = -1; 1441 } 1442 } 1443 1444 np->n_dblkno = 1; 1445 } 1446 1447 /* 1448 * Called once before VFS init to initialize shared and 1449 * server-specific data structures. 1450 */ 1451 void 1452 nfs_init() 1453 { 1454 nfsrtt.pos = 0; 1455 rpc_vers = txdr_unsigned(RPC_VER2); 1456 rpc_call = txdr_unsigned(RPC_CALL); 1457 rpc_reply = txdr_unsigned(RPC_REPLY); 1458 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1459 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1460 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1461 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1462 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1463 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1464 nfs_prog = txdr_unsigned(NFS_PROG); 1465 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1466 nfs_true = txdr_unsigned(TRUE); 1467 nfs_false = txdr_unsigned(FALSE); 1468 nfs_xdrneg1 = txdr_unsigned(-1); 1469 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1470 if (nfs_ticks < 1) 1471 nfs_ticks = 1; 1472 #ifdef NFSSERVER 1473 nfsrv_init(0); /* Init server data structures */ 1474 nfsrv_initcache(); /* Init the server request cache */ 1475 pool_init(&nfs_srvdesc_pool, sizeof(struct nfsrv_descript), 1476 0, 0, 0, "nfsrvdescpl", &pool_allocator_nointr); 1477 #endif /* NFSSERVER */ 1478 1479 #if defined(NFSSERVER) || !defined(NFS_V2_ONLY) 1480 /* 1481 * Initialize the nqnfs data structures. 1482 */ 1483 if (nqnfsstarttime == 0) { 1484 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1485 + nqsrv_clockskew + nqsrv_writeslack; 1486 NQLOADNOVRAM(nqnfsstarttime); 1487 CIRCLEQ_INIT(&nqtimerhead); 1488 nqfhhashtbl = hashinit(NQLCHSZ, HASH_LIST, M_NQLEASE, 1489 M_WAITOK, &nqfhhash); 1490 } 1491 #endif 1492 1493 exithook_establish(nfs_exit, NULL); 1494 1495 /* 1496 * Initialize reply list and start timer 1497 */ 1498 TAILQ_INIT(&nfs_reqq); 1499 nfs_timer(NULL); 1500 MOWNER_ATTACH(&nfs_mowner); 1501 1502 #ifdef NFS 1503 /* Initialize the kqueue structures */ 1504 nfs_kqinit(); 1505 /* Initialize the iod structures */ 1506 nfs_iodinit(); 1507 #endif 1508 } 1509 1510 #ifdef NFS 1511 /* 1512 * Called once at VFS init to initialize client-specific data structures. 1513 */ 1514 void 1515 nfs_vfs_init() 1516 { 1517 nfs_nhinit(); /* Init the nfsnode table */ 1518 nfs_commitsize = uvmexp.npages << (PAGE_SHIFT - 4); 1519 } 1520 1521 void 1522 nfs_vfs_reinit() 1523 { 1524 nfs_nhreinit(); 1525 } 1526 1527 void 1528 nfs_vfs_done() 1529 { 1530 nfs_nhdone(); 1531 } 1532 1533 /* 1534 * Attribute cache routines. 1535 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1536 * that are on the mbuf list 1537 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1538 * error otherwise 1539 */ 1540 1541 /* 1542 * Load the attribute cache (that lives in the nfsnode entry) with 1543 * the values on the mbuf list and 1544 * Iff vap not NULL 1545 * copy the attributes to *vaper 1546 */ 1547 int 1548 nfsm_loadattrcache(vpp, mdp, dposp, vaper, flags) 1549 struct vnode **vpp; 1550 struct mbuf **mdp; 1551 caddr_t *dposp; 1552 struct vattr *vaper; 1553 int flags; 1554 { 1555 int32_t t1; 1556 caddr_t cp2; 1557 int error = 0; 1558 struct mbuf *md; 1559 int v3 = NFS_ISV3(*vpp); 1560 1561 md = *mdp; 1562 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1563 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1564 if (error) 1565 return (error); 1566 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); 1567 } 1568 1569 int 1570 nfs_loadattrcache(vpp, fp, vaper, flags) 1571 struct vnode **vpp; 1572 struct nfs_fattr *fp; 1573 struct vattr *vaper; 1574 int flags; 1575 { 1576 struct vnode *vp = *vpp; 1577 struct vattr *vap; 1578 int v3 = NFS_ISV3(vp); 1579 enum vtype vtyp; 1580 u_short vmode; 1581 struct timespec mtime; 1582 struct vnode *nvp; 1583 int32_t rdev; 1584 struct nfsnode *np; 1585 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1586 uid_t uid; 1587 gid_t gid; 1588 1589 if (v3) { 1590 vtyp = nfsv3tov_type(fp->fa_type); 1591 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1592 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 1593 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 1594 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1595 } else { 1596 vtyp = nfsv2tov_type(fp->fa_type); 1597 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1598 if (vtyp == VNON || vtyp == VREG) 1599 vtyp = IFTOVT(vmode); 1600 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1601 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1602 1603 /* 1604 * Really ugly NFSv2 kludge. 1605 */ 1606 if (vtyp == VCHR && rdev == 0xffffffff) 1607 vtyp = VFIFO; 1608 } 1609 1610 vmode &= ALLPERMS; 1611 1612 /* 1613 * If v_type == VNON it is a new node, so fill in the v_type, 1614 * n_mtime fields. Check to see if it represents a special 1615 * device, and if so, check for a possible alias. Once the 1616 * correct vnode has been obtained, fill in the rest of the 1617 * information. 1618 */ 1619 np = VTONFS(vp); 1620 if (vp->v_type == VNON) { 1621 vp->v_type = vtyp; 1622 if (vp->v_type == VFIFO) { 1623 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1624 vp->v_op = fifo_nfsv2nodeop_p; 1625 } else if (vp->v_type == VREG) { 1626 lockinit(&np->n_commitlock, PINOD, "nfsclock", 0, 0); 1627 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1628 vp->v_op = spec_nfsv2nodeop_p; 1629 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1630 if (nvp) { 1631 /* 1632 * Discard unneeded vnode, but save its nfsnode. 1633 * Since the nfsnode does not have a lock, its 1634 * vnode lock has to be carried over. 1635 */ 1636 /* 1637 * XXX is the old node sure to be locked here? 1638 */ 1639 KASSERT(lockstatus(&vp->v_lock) == 1640 LK_EXCLUSIVE); 1641 nvp->v_data = vp->v_data; 1642 vp->v_data = NULL; 1643 VOP_UNLOCK(vp, 0); 1644 vp->v_op = spec_vnodeop_p; 1645 vrele(vp); 1646 vgone(vp); 1647 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, 1648 &nvp->v_interlock); 1649 /* 1650 * Reinitialize aliased node. 1651 */ 1652 np->n_vnode = nvp; 1653 *vpp = vp = nvp; 1654 } 1655 } 1656 np->n_mtime = mtime; 1657 } 1658 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1659 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1660 vap = np->n_vattr; 1661 1662 /* 1663 * Invalidate access cache if uid, gid or mode changed. 1664 */ 1665 if (np->n_accstamp != -1 && 1666 (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode)) 1667 np->n_accstamp = -1; 1668 1669 vap->va_type = vtyp; 1670 vap->va_mode = vmode; 1671 vap->va_rdev = (dev_t)rdev; 1672 vap->va_mtime = mtime; 1673 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1674 switch (vtyp) { 1675 case VDIR: 1676 vap->va_blocksize = NFS_DIRFRAGSIZ; 1677 break; 1678 case VBLK: 1679 vap->va_blocksize = BLKDEV_IOSIZE; 1680 break; 1681 case VCHR: 1682 vap->va_blocksize = MAXBSIZE; 1683 break; 1684 default: 1685 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1686 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1687 break; 1688 } 1689 if (v3) { 1690 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1691 vap->va_uid = uid; 1692 vap->va_gid = gid; 1693 vap->va_size = fxdr_hyper(&fp->fa3_size); 1694 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1695 vap->va_fileid = fxdr_unsigned(int32_t, 1696 fp->fa3_fileid.nfsuquad[1]); 1697 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1698 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1699 vap->va_flags = 0; 1700 vap->va_filerev = 0; 1701 } else { 1702 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1703 vap->va_uid = uid; 1704 vap->va_gid = gid; 1705 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1706 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1707 * NFS_FABLKSIZE; 1708 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1709 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1710 vap->va_flags = 0; 1711 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1712 fp->fa2_ctime.nfsv2_sec); 1713 vap->va_ctime.tv_nsec = 0; 1714 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1715 vap->va_filerev = 0; 1716 } 1717 if (vap->va_size != np->n_size) { 1718 if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { 1719 vap->va_size = np->n_size; 1720 } else { 1721 np->n_size = vap->va_size; 1722 if (vap->va_type == VREG) { 1723 if ((flags & NAC_NOTRUNC) 1724 && np->n_size < vp->v_size) { 1725 /* 1726 * we can't free pages now because 1727 * the pages can be owned by ourselves. 1728 */ 1729 np->n_flag |= NTRUNCDELAYED; 1730 } 1731 else { 1732 uvm_vnp_setsize(vp, np->n_size); 1733 } 1734 } 1735 } 1736 } 1737 np->n_attrstamp = time.tv_sec; 1738 if (vaper != NULL) { 1739 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(*vap)); 1740 if (np->n_flag & NCHG) { 1741 if (np->n_flag & NACC) 1742 vaper->va_atime = np->n_atim; 1743 if (np->n_flag & NUPD) 1744 vaper->va_mtime = np->n_mtim; 1745 } 1746 } 1747 return (0); 1748 } 1749 1750 /* 1751 * Check the time stamp 1752 * If the cache is valid, copy contents to *vap and return 0 1753 * otherwise return an error 1754 */ 1755 int 1756 nfs_getattrcache(vp, vaper) 1757 struct vnode *vp; 1758 struct vattr *vaper; 1759 { 1760 struct nfsnode *np = VTONFS(vp); 1761 struct vattr *vap; 1762 1763 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1764 nfsstats.attrcache_misses++; 1765 return (ENOENT); 1766 } 1767 nfsstats.attrcache_hits++; 1768 vap = np->n_vattr; 1769 if (vap->va_size != np->n_size) { 1770 if (vap->va_type == VREG) { 1771 if (np->n_flag & NMODIFIED) { 1772 if (vap->va_size < np->n_size) 1773 vap->va_size = np->n_size; 1774 else 1775 np->n_size = vap->va_size; 1776 } else 1777 np->n_size = vap->va_size; 1778 uvm_vnp_setsize(vp, np->n_size); 1779 } else 1780 np->n_size = vap->va_size; 1781 } 1782 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(struct vattr)); 1783 if (np->n_flag & NCHG) { 1784 if (np->n_flag & NACC) 1785 vaper->va_atime = np->n_atim; 1786 if (np->n_flag & NUPD) 1787 vaper->va_mtime = np->n_mtim; 1788 } 1789 return (0); 1790 } 1791 1792 void 1793 nfs_delayedtruncate(vp) 1794 struct vnode *vp; 1795 { 1796 struct nfsnode *np = VTONFS(vp); 1797 1798 if (np->n_flag & NTRUNCDELAYED) { 1799 np->n_flag &= ~NTRUNCDELAYED; 1800 uvm_vnp_setsize(vp, np->n_size); 1801 } 1802 } 1803 1804 /* 1805 * Heuristic to see if the server XDR encodes directory cookies or not. 1806 * it is not supposed to, but a lot of servers may do this. Also, since 1807 * most/all servers will implement V2 as well, it is expected that they 1808 * may return just 32 bits worth of cookie information, so we need to 1809 * find out in which 32 bits this information is available. We do this 1810 * to avoid trouble with emulated binaries that can't handle 64 bit 1811 * directory offsets. 1812 */ 1813 1814 void 1815 nfs_cookieheuristic(vp, flagp, p, cred) 1816 struct vnode *vp; 1817 int *flagp; 1818 struct proc *p; 1819 struct ucred *cred; 1820 { 1821 struct uio auio; 1822 struct iovec aiov; 1823 caddr_t buf, cp; 1824 struct dirent *dp; 1825 off_t *cookies = NULL, *cop; 1826 int error, eof, nc, len; 1827 1828 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1829 1830 aiov.iov_base = buf; 1831 aiov.iov_len = NFS_DIRFRAGSIZ; 1832 auio.uio_iov = &aiov; 1833 auio.uio_iovcnt = 1; 1834 auio.uio_rw = UIO_READ; 1835 auio.uio_segflg = UIO_SYSSPACE; 1836 auio.uio_procp = p; 1837 auio.uio_resid = NFS_DIRFRAGSIZ; 1838 auio.uio_offset = 0; 1839 1840 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1841 1842 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1843 if (error || len == 0) { 1844 FREE(buf, M_TEMP); 1845 if (cookies) 1846 free(cookies, M_TEMP); 1847 return; 1848 } 1849 1850 /* 1851 * Find the first valid entry and look at its offset cookie. 1852 */ 1853 1854 cp = buf; 1855 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1856 dp = (struct dirent *)cp; 1857 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1858 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1859 *flagp |= NFSMNT_SWAPCOOKIE; 1860 nfs_invaldircache(vp, 0); 1861 nfs_vinvalbuf(vp, 0, cred, p, 1); 1862 } 1863 break; 1864 } 1865 cop++; 1866 cp += dp->d_reclen; 1867 } 1868 1869 FREE(buf, M_TEMP); 1870 free(cookies, M_TEMP); 1871 } 1872 #endif /* NFS */ 1873 1874 /* 1875 * Set up nameidata for a lookup() call and do it. 1876 * 1877 * If pubflag is set, this call is done for a lookup operation on the 1878 * public filehandle. In that case we allow crossing mountpoints and 1879 * absolute pathnames. However, the caller is expected to check that 1880 * the lookup result is within the public fs, and deny access if 1881 * it is not. 1882 */ 1883 int 1884 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1885 struct nameidata *ndp; 1886 fhandle_t *fhp; 1887 uint32_t len; 1888 struct nfssvc_sock *slp; 1889 struct mbuf *nam; 1890 struct mbuf **mdp; 1891 caddr_t *dposp; 1892 struct vnode **retdirp; 1893 struct proc *p; 1894 int kerbflag, pubflag; 1895 { 1896 int i, rem; 1897 struct mbuf *md; 1898 char *fromcp, *tocp, *cp; 1899 struct iovec aiov; 1900 struct uio auio; 1901 struct vnode *dp; 1902 int error, rdonly, linklen; 1903 struct componentname *cnp = &ndp->ni_cnd; 1904 1905 *retdirp = (struct vnode *)0; 1906 1907 if ((len + 1) > MAXPATHLEN) 1908 return (ENAMETOOLONG); 1909 cnp->cn_pnbuf = PNBUF_GET(); 1910 1911 /* 1912 * Copy the name from the mbuf list to ndp->ni_pnbuf 1913 * and set the various ndp fields appropriately. 1914 */ 1915 fromcp = *dposp; 1916 tocp = cnp->cn_pnbuf; 1917 md = *mdp; 1918 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1919 for (i = 0; i < len; i++) { 1920 while (rem == 0) { 1921 md = md->m_next; 1922 if (md == NULL) { 1923 error = EBADRPC; 1924 goto out; 1925 } 1926 fromcp = mtod(md, caddr_t); 1927 rem = md->m_len; 1928 } 1929 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1930 error = EACCES; 1931 goto out; 1932 } 1933 *tocp++ = *fromcp++; 1934 rem--; 1935 } 1936 *tocp = '\0'; 1937 *mdp = md; 1938 *dposp = fromcp; 1939 len = nfsm_rndup(len)-len; 1940 if (len > 0) { 1941 if (rem >= len) 1942 *dposp += len; 1943 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1944 goto out; 1945 } 1946 1947 /* 1948 * Extract and set starting directory. 1949 */ 1950 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1951 nam, &rdonly, kerbflag, pubflag); 1952 if (error) 1953 goto out; 1954 if (dp->v_type != VDIR) { 1955 vrele(dp); 1956 error = ENOTDIR; 1957 goto out; 1958 } 1959 1960 if (rdonly) 1961 cnp->cn_flags |= RDONLY; 1962 1963 *retdirp = dp; 1964 1965 if (pubflag) { 1966 /* 1967 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1968 * and the 'native path' indicator. 1969 */ 1970 cp = PNBUF_GET(); 1971 fromcp = cnp->cn_pnbuf; 1972 tocp = cp; 1973 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1974 switch ((unsigned char)*fromcp) { 1975 case WEBNFS_NATIVE_CHAR: 1976 /* 1977 * 'Native' path for us is the same 1978 * as a path according to the NFS spec, 1979 * just skip the escape char. 1980 */ 1981 fromcp++; 1982 break; 1983 /* 1984 * More may be added in the future, range 0x80-0xff 1985 */ 1986 default: 1987 error = EIO; 1988 PNBUF_PUT(cp); 1989 goto out; 1990 } 1991 } 1992 /* 1993 * Translate the '%' escapes, URL-style. 1994 */ 1995 while (*fromcp != '\0') { 1996 if (*fromcp == WEBNFS_ESC_CHAR) { 1997 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1998 fromcp++; 1999 *tocp++ = HEXSTRTOI(fromcp); 2000 fromcp += 2; 2001 continue; 2002 } else { 2003 error = ENOENT; 2004 PNBUF_PUT(cp); 2005 goto out; 2006 } 2007 } else 2008 *tocp++ = *fromcp++; 2009 } 2010 *tocp = '\0'; 2011 PNBUF_PUT(cnp->cn_pnbuf); 2012 cnp->cn_pnbuf = cp; 2013 } 2014 2015 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 2016 ndp->ni_segflg = UIO_SYSSPACE; 2017 ndp->ni_rootdir = rootvnode; 2018 2019 if (pubflag) { 2020 ndp->ni_loopcnt = 0; 2021 if (cnp->cn_pnbuf[0] == '/') 2022 dp = rootvnode; 2023 } else { 2024 cnp->cn_flags |= NOCROSSMOUNT; 2025 } 2026 2027 cnp->cn_proc = p; 2028 VREF(dp); 2029 2030 for (;;) { 2031 cnp->cn_nameptr = cnp->cn_pnbuf; 2032 ndp->ni_startdir = dp; 2033 /* 2034 * And call lookup() to do the real work 2035 */ 2036 error = lookup(ndp); 2037 if (error) { 2038 PNBUF_PUT(cnp->cn_pnbuf); 2039 return (error); 2040 } 2041 /* 2042 * Check for encountering a symbolic link 2043 */ 2044 if ((cnp->cn_flags & ISSYMLINK) == 0) { 2045 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 2046 cnp->cn_flags |= HASBUF; 2047 else 2048 PNBUF_PUT(cnp->cn_pnbuf); 2049 return (0); 2050 } else { 2051 if ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN)) 2052 VOP_UNLOCK(ndp->ni_dvp, 0); 2053 if (!pubflag) { 2054 error = EINVAL; 2055 break; 2056 } 2057 2058 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 2059 error = ELOOP; 2060 break; 2061 } 2062 if (ndp->ni_vp->v_mount->mnt_flag & MNT_SYMPERM) { 2063 error = VOP_ACCESS(ndp->ni_vp, VEXEC, cnp->cn_cred, 2064 cnp->cn_proc); 2065 if (error != 0) 2066 break; 2067 } 2068 if (ndp->ni_pathlen > 1) 2069 cp = PNBUF_GET(); 2070 else 2071 cp = cnp->cn_pnbuf; 2072 aiov.iov_base = cp; 2073 aiov.iov_len = MAXPATHLEN; 2074 auio.uio_iov = &aiov; 2075 auio.uio_iovcnt = 1; 2076 auio.uio_offset = 0; 2077 auio.uio_rw = UIO_READ; 2078 auio.uio_segflg = UIO_SYSSPACE; 2079 auio.uio_procp = (struct proc *)0; 2080 auio.uio_resid = MAXPATHLEN; 2081 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 2082 if (error) { 2083 badlink: 2084 if (ndp->ni_pathlen > 1) 2085 PNBUF_PUT(cp); 2086 break; 2087 } 2088 linklen = MAXPATHLEN - auio.uio_resid; 2089 if (linklen == 0) { 2090 error = ENOENT; 2091 goto badlink; 2092 } 2093 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 2094 error = ENAMETOOLONG; 2095 goto badlink; 2096 } 2097 if (ndp->ni_pathlen > 1) { 2098 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 2099 PNBUF_PUT(cnp->cn_pnbuf); 2100 cnp->cn_pnbuf = cp; 2101 } else 2102 cnp->cn_pnbuf[linklen] = '\0'; 2103 ndp->ni_pathlen += linklen; 2104 vput(ndp->ni_vp); 2105 dp = ndp->ni_dvp; 2106 /* 2107 * Check if root directory should replace current directory. 2108 */ 2109 if (cnp->cn_pnbuf[0] == '/') { 2110 vrele(dp); 2111 dp = ndp->ni_rootdir; 2112 VREF(dp); 2113 } 2114 } 2115 } 2116 vrele(ndp->ni_dvp); 2117 vput(ndp->ni_vp); 2118 ndp->ni_vp = NULL; 2119 out: 2120 PNBUF_PUT(cnp->cn_pnbuf); 2121 return (error); 2122 } 2123 2124 /* 2125 * A fiddled version of m_adj() that ensures null fill to a 32-bit 2126 * boundary and only trims off the back end 2127 * 2128 * 1. trim off 'len' bytes as m_adj(mp, -len). 2129 * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 2130 */ 2131 void 2132 nfs_zeropad(mp, len, nul) 2133 struct mbuf *mp; 2134 int len; 2135 int nul; 2136 { 2137 struct mbuf *m; 2138 int count; 2139 2140 /* 2141 * Trim from tail. Scan the mbuf chain, 2142 * calculating its length and finding the last mbuf. 2143 * If the adjustment only affects this mbuf, then just 2144 * adjust and return. Otherwise, rescan and truncate 2145 * after the remaining size. 2146 */ 2147 count = 0; 2148 m = mp; 2149 for (;;) { 2150 count += m->m_len; 2151 if (m->m_next == NULL) 2152 break; 2153 m = m->m_next; 2154 } 2155 2156 KDASSERT(count >= len); 2157 2158 if (m->m_len >= len) { 2159 m->m_len -= len; 2160 } else { 2161 count -= len; 2162 /* 2163 * Correct length for chain is "count". 2164 * Find the mbuf with last data, adjust its length, 2165 * and toss data from remaining mbufs on chain. 2166 */ 2167 for (m = mp; m; m = m->m_next) { 2168 if (m->m_len >= count) { 2169 m->m_len = count; 2170 break; 2171 } 2172 count -= m->m_len; 2173 } 2174 m_freem(m->m_next); 2175 m->m_next = NULL; 2176 } 2177 2178 KDASSERT(m->m_next == NULL); 2179 2180 /* 2181 * zero-padding. 2182 */ 2183 if (nul > 0) { 2184 char *cp; 2185 int i; 2186 2187 if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 2188 struct mbuf *n; 2189 2190 KDASSERT(MLEN >= nul); 2191 n = m_get(M_WAIT, MT_DATA); 2192 MCLAIM(n, &nfs_mowner); 2193 n->m_len = nul; 2194 n->m_next = NULL; 2195 m->m_next = n; 2196 cp = mtod(n, caddr_t); 2197 } else { 2198 cp = mtod(m, caddr_t) + m->m_len; 2199 m->m_len += nul; 2200 } 2201 for (i = 0; i < nul; i++) 2202 *cp++ = '\0'; 2203 } 2204 return; 2205 } 2206 2207 /* 2208 * Make these functions instead of macros, so that the kernel text size 2209 * doesn't get too big... 2210 */ 2211 void 2212 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2213 struct nfsrv_descript *nfsd; 2214 int before_ret; 2215 struct vattr *before_vap; 2216 int after_ret; 2217 struct vattr *after_vap; 2218 struct mbuf **mbp; 2219 char **bposp; 2220 { 2221 struct mbuf *mb = *mbp; 2222 char *bpos = *bposp; 2223 u_int32_t *tl; 2224 2225 if (before_ret) { 2226 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2227 *tl = nfs_false; 2228 } else { 2229 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2230 *tl++ = nfs_true; 2231 txdr_hyper(before_vap->va_size, tl); 2232 tl += 2; 2233 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2234 tl += 2; 2235 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2236 } 2237 *bposp = bpos; 2238 *mbp = mb; 2239 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2240 } 2241 2242 void 2243 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2244 struct nfsrv_descript *nfsd; 2245 int after_ret; 2246 struct vattr *after_vap; 2247 struct mbuf **mbp; 2248 char **bposp; 2249 { 2250 struct mbuf *mb = *mbp; 2251 char *bpos = *bposp; 2252 u_int32_t *tl; 2253 struct nfs_fattr *fp; 2254 2255 if (after_ret) { 2256 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2257 *tl = nfs_false; 2258 } else { 2259 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2260 *tl++ = nfs_true; 2261 fp = (struct nfs_fattr *)tl; 2262 nfsm_srvfattr(nfsd, after_vap, fp); 2263 } 2264 *mbp = mb; 2265 *bposp = bpos; 2266 } 2267 2268 void 2269 nfsm_srvfattr(nfsd, vap, fp) 2270 struct nfsrv_descript *nfsd; 2271 struct vattr *vap; 2272 struct nfs_fattr *fp; 2273 { 2274 2275 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2276 fp->fa_uid = txdr_unsigned(vap->va_uid); 2277 fp->fa_gid = txdr_unsigned(vap->va_gid); 2278 if (nfsd->nd_flag & ND_NFSV3) { 2279 fp->fa_type = vtonfsv3_type(vap->va_type); 2280 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2281 txdr_hyper(vap->va_size, &fp->fa3_size); 2282 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2283 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2284 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2285 fp->fa3_fsid.nfsuquad[0] = 0; 2286 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2287 fp->fa3_fileid.nfsuquad[0] = 0; 2288 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2289 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2290 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2291 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2292 } else { 2293 fp->fa_type = vtonfsv2_type(vap->va_type); 2294 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2295 fp->fa2_size = txdr_unsigned(vap->va_size); 2296 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2297 if (vap->va_type == VFIFO) 2298 fp->fa2_rdev = 0xffffffff; 2299 else 2300 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2301 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2302 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2303 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2304 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2305 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2306 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2307 } 2308 } 2309 2310 /* 2311 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2312 * - look up fsid in mount list (if not found ret error) 2313 * - get vp and export rights by calling VFS_FHTOVP() 2314 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2315 * - if not lockflag unlock it with VOP_UNLOCK() 2316 */ 2317 int 2318 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2319 fhandle_t *fhp; 2320 int lockflag; 2321 struct vnode **vpp; 2322 struct ucred *cred; 2323 struct nfssvc_sock *slp; 2324 struct mbuf *nam; 2325 int *rdonlyp; 2326 int kerbflag; 2327 { 2328 struct mount *mp; 2329 int i; 2330 struct ucred *credanon; 2331 int error, exflags; 2332 struct sockaddr_in *saddr; 2333 2334 *vpp = (struct vnode *)0; 2335 2336 if (nfs_ispublicfh(fhp)) { 2337 if (!pubflag || !nfs_pub.np_valid) 2338 return (ESTALE); 2339 fhp = &nfs_pub.np_handle; 2340 } 2341 2342 mp = vfs_getvfs(&fhp->fh_fsid); 2343 if (!mp) 2344 return (ESTALE); 2345 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 2346 if (error) 2347 return (error); 2348 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2349 if (error) 2350 return (error); 2351 2352 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2353 saddr = mtod(nam, struct sockaddr_in *); 2354 if ((saddr->sin_family == AF_INET) && 2355 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2356 vput(*vpp); 2357 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2358 } 2359 #ifdef INET6 2360 if ((saddr->sin_family == AF_INET6) && 2361 ntohs(saddr->sin_port) >= IPV6PORT_RESERVED) { 2362 vput(*vpp); 2363 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2364 } 2365 #endif 2366 } 2367 /* 2368 * Check/setup credentials. 2369 */ 2370 if (exflags & MNT_EXKERB) { 2371 if (!kerbflag) { 2372 vput(*vpp); 2373 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2374 } 2375 } else if (kerbflag) { 2376 vput(*vpp); 2377 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2378 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2379 cred->cr_uid = credanon->cr_uid; 2380 cred->cr_gid = credanon->cr_gid; 2381 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2382 cred->cr_groups[i] = credanon->cr_groups[i]; 2383 cred->cr_ngroups = i; 2384 } 2385 if (exflags & MNT_EXRDONLY) 2386 *rdonlyp = 1; 2387 else 2388 *rdonlyp = 0; 2389 if (!lockflag) 2390 VOP_UNLOCK(*vpp, 0); 2391 return (0); 2392 } 2393 2394 /* 2395 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2396 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2397 * transformed this to all zeroes in both cases, so check for it. 2398 */ 2399 int 2400 nfs_ispublicfh(fhp) 2401 fhandle_t *fhp; 2402 { 2403 char *cp = (char *)fhp; 2404 int i; 2405 2406 for (i = 0; i < NFSX_V3FH; i++) 2407 if (*cp++ != 0) 2408 return (FALSE); 2409 return (TRUE); 2410 } 2411 2412 /* 2413 * This function compares two net addresses by family and returns TRUE 2414 * if they are the same host. 2415 * If there is any doubt, return FALSE. 2416 * The AF_INET family is handled as a special case so that address mbufs 2417 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2418 */ 2419 int 2420 netaddr_match(family, haddr, nam) 2421 int family; 2422 union nethostaddr *haddr; 2423 struct mbuf *nam; 2424 { 2425 struct sockaddr_in *inetaddr; 2426 2427 switch (family) { 2428 case AF_INET: 2429 inetaddr = mtod(nam, struct sockaddr_in *); 2430 if (inetaddr->sin_family == AF_INET && 2431 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2432 return (1); 2433 break; 2434 #ifdef INET6 2435 case AF_INET6: 2436 { 2437 struct sockaddr_in6 *sin6_1, *sin6_2; 2438 2439 sin6_1 = mtod(nam, struct sockaddr_in6 *); 2440 sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 2441 if (sin6_1->sin6_family == AF_INET6 && 2442 IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 2443 return 1; 2444 } 2445 #endif 2446 #ifdef ISO 2447 case AF_ISO: 2448 { 2449 struct sockaddr_iso *isoaddr1, *isoaddr2; 2450 2451 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2452 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2453 if (isoaddr1->siso_family == AF_ISO && 2454 isoaddr1->siso_nlen > 0 && 2455 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2456 SAME_ISOADDR(isoaddr1, isoaddr2)) 2457 return (1); 2458 break; 2459 } 2460 #endif /* ISO */ 2461 default: 2462 break; 2463 }; 2464 return (0); 2465 } 2466 2467 /* 2468 * The write verifier has changed (probably due to a server reboot), so all 2469 * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 2470 * as dirty or are being written out just now, all this takes is clearing 2471 * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 2472 * the mount point. 2473 */ 2474 void 2475 nfs_clearcommit(mp) 2476 struct mount *mp; 2477 { 2478 struct vnode *vp; 2479 struct nfsnode *np; 2480 struct vm_page *pg; 2481 struct nfsmount *nmp = VFSTONFS(mp); 2482 2483 lockmgr(&nmp->nm_writeverflock, LK_EXCLUSIVE, NULL); 2484 2485 LIST_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 2486 KASSERT(vp->v_mount == mp); 2487 if (vp->v_type == VNON) 2488 continue; 2489 np = VTONFS(vp); 2490 np->n_pushlo = np->n_pushhi = np->n_pushedlo = 2491 np->n_pushedhi = 0; 2492 np->n_commitflags &= 2493 ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 2494 simple_lock(&vp->v_uobj.vmobjlock); 2495 TAILQ_FOREACH(pg, &vp->v_uobj.memq, listq) { 2496 pg->flags &= ~PG_NEEDCOMMIT; 2497 } 2498 simple_unlock(&vp->v_uobj.vmobjlock); 2499 } 2500 simple_lock(&nmp->nm_slock); 2501 nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 2502 simple_unlock(&nmp->nm_slock); 2503 lockmgr(&nmp->nm_writeverflock, LK_RELEASE, NULL); 2504 } 2505 2506 void 2507 nfs_merge_commit_ranges(vp) 2508 struct vnode *vp; 2509 { 2510 struct nfsnode *np = VTONFS(vp); 2511 2512 KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 2513 2514 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2515 np->n_pushedlo = np->n_pushlo; 2516 np->n_pushedhi = np->n_pushhi; 2517 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2518 } else { 2519 if (np->n_pushlo < np->n_pushedlo) 2520 np->n_pushedlo = np->n_pushlo; 2521 if (np->n_pushhi > np->n_pushedhi) 2522 np->n_pushedhi = np->n_pushhi; 2523 } 2524 2525 np->n_pushlo = np->n_pushhi = 0; 2526 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 2527 2528 #ifdef NFS_DEBUG_COMMIT 2529 printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2530 (unsigned)np->n_pushedhi); 2531 #endif 2532 } 2533 2534 int 2535 nfs_in_committed_range(vp, off, len) 2536 struct vnode *vp; 2537 off_t off, len; 2538 { 2539 struct nfsnode *np = VTONFS(vp); 2540 off_t lo, hi; 2541 2542 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2543 return 0; 2544 lo = off; 2545 hi = lo + len; 2546 2547 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 2548 } 2549 2550 int 2551 nfs_in_tobecommitted_range(vp, off, len) 2552 struct vnode *vp; 2553 off_t off, len; 2554 { 2555 struct nfsnode *np = VTONFS(vp); 2556 off_t lo, hi; 2557 2558 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2559 return 0; 2560 lo = off; 2561 hi = lo + len; 2562 2563 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 2564 } 2565 2566 void 2567 nfs_add_committed_range(vp, off, len) 2568 struct vnode *vp; 2569 off_t off, len; 2570 { 2571 struct nfsnode *np = VTONFS(vp); 2572 off_t lo, hi; 2573 2574 lo = off; 2575 hi = lo + len; 2576 2577 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2578 np->n_pushedlo = lo; 2579 np->n_pushedhi = hi; 2580 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2581 } else { 2582 if (hi > np->n_pushedhi) 2583 np->n_pushedhi = hi; 2584 if (lo < np->n_pushedlo) 2585 np->n_pushedlo = lo; 2586 } 2587 #ifdef NFS_DEBUG_COMMIT 2588 printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2589 (unsigned)np->n_pushedhi); 2590 #endif 2591 } 2592 2593 void 2594 nfs_del_committed_range(vp, off, len) 2595 struct vnode *vp; 2596 off_t off, len; 2597 { 2598 struct nfsnode *np = VTONFS(vp); 2599 off_t lo, hi; 2600 2601 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2602 return; 2603 2604 lo = off; 2605 hi = lo + len; 2606 2607 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 2608 return; 2609 if (lo <= np->n_pushedlo) 2610 np->n_pushedlo = hi; 2611 else if (hi >= np->n_pushedhi) 2612 np->n_pushedhi = lo; 2613 else { 2614 /* 2615 * XXX There's only one range. If the deleted range 2616 * is in the middle, pick the largest of the 2617 * contiguous ranges that it leaves. 2618 */ 2619 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 2620 np->n_pushedhi = lo; 2621 else 2622 np->n_pushedlo = hi; 2623 } 2624 #ifdef NFS_DEBUG_COMMIT 2625 printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2626 (unsigned)np->n_pushedhi); 2627 #endif 2628 } 2629 2630 void 2631 nfs_add_tobecommitted_range(vp, off, len) 2632 struct vnode *vp; 2633 off_t off, len; 2634 { 2635 struct nfsnode *np = VTONFS(vp); 2636 off_t lo, hi; 2637 2638 lo = off; 2639 hi = lo + len; 2640 2641 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 2642 np->n_pushlo = lo; 2643 np->n_pushhi = hi; 2644 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 2645 } else { 2646 if (lo < np->n_pushlo) 2647 np->n_pushlo = lo; 2648 if (hi > np->n_pushhi) 2649 np->n_pushhi = hi; 2650 } 2651 #ifdef NFS_DEBUG_COMMIT 2652 printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2653 (unsigned)np->n_pushhi); 2654 #endif 2655 } 2656 2657 void 2658 nfs_del_tobecommitted_range(vp, off, len) 2659 struct vnode *vp; 2660 off_t off, len; 2661 { 2662 struct nfsnode *np = VTONFS(vp); 2663 off_t lo, hi; 2664 2665 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2666 return; 2667 2668 lo = off; 2669 hi = lo + len; 2670 2671 if (lo > np->n_pushhi || hi < np->n_pushlo) 2672 return; 2673 2674 if (lo <= np->n_pushlo) 2675 np->n_pushlo = hi; 2676 else if (hi >= np->n_pushhi) 2677 np->n_pushhi = lo; 2678 else { 2679 /* 2680 * XXX There's only one range. If the deleted range 2681 * is in the middle, pick the largest of the 2682 * contiguous ranges that it leaves. 2683 */ 2684 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 2685 np->n_pushhi = lo; 2686 else 2687 np->n_pushlo = hi; 2688 } 2689 #ifdef NFS_DEBUG_COMMIT 2690 printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2691 (unsigned)np->n_pushhi); 2692 #endif 2693 } 2694 2695 /* 2696 * Map errnos to NFS error numbers. For Version 3 also filter out error 2697 * numbers not specified for the associated procedure. 2698 */ 2699 int 2700 nfsrv_errmap(nd, err) 2701 struct nfsrv_descript *nd; 2702 int err; 2703 { 2704 const short *defaulterrp, *errp; 2705 2706 if (nd->nd_flag & ND_NFSV3) { 2707 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2708 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2709 while (*++errp) { 2710 if (*errp == err) 2711 return (err); 2712 else if (*errp > err) 2713 break; 2714 } 2715 return ((int)*defaulterrp); 2716 } else 2717 return (err & 0xffff); 2718 } 2719 if (err <= ELAST) 2720 return ((int)nfsrv_v2errmap[err - 1]); 2721 return (NFSERR_IO); 2722 } 2723 2724 /* 2725 * Sort the group list in increasing numerical order. 2726 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2727 * that used to be here.) 2728 */ 2729 void 2730 nfsrvw_sort(list, num) 2731 gid_t *list; 2732 int num; 2733 { 2734 int i, j; 2735 gid_t v; 2736 2737 /* Insertion sort. */ 2738 for (i = 1; i < num; i++) { 2739 v = list[i]; 2740 /* find correct slot for value v, moving others up */ 2741 for (j = i; --j >= 0 && v < list[j];) 2742 list[j + 1] = list[j]; 2743 list[j + 1] = v; 2744 } 2745 } 2746 2747 /* 2748 * copy credentials making sure that the result can be compared with memcmp(). 2749 */ 2750 void 2751 nfsrv_setcred(incred, outcred) 2752 struct ucred *incred, *outcred; 2753 { 2754 int i; 2755 2756 memset((caddr_t)outcred, 0, sizeof (struct ucred)); 2757 outcred->cr_ref = 1; 2758 outcred->cr_uid = incred->cr_uid; 2759 outcred->cr_gid = incred->cr_gid; 2760 outcred->cr_ngroups = incred->cr_ngroups; 2761 for (i = 0; i < incred->cr_ngroups; i++) 2762 outcred->cr_groups[i] = incred->cr_groups[i]; 2763 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2764 } 2765 2766 u_int32_t 2767 nfs_getxid() 2768 { 2769 static u_int32_t base; 2770 static u_int32_t nfs_xid = 0; 2771 static struct simplelock nfs_xidlock = SIMPLELOCK_INITIALIZER; 2772 u_int32_t newxid; 2773 2774 simple_lock(&nfs_xidlock); 2775 /* 2776 * derive initial xid from system time 2777 * XXX time is invalid if root not yet mounted 2778 */ 2779 if (__predict_false(!base && (rootvp))) { 2780 struct timeval tv; 2781 2782 microtime(&tv); 2783 base = tv.tv_sec << 12; 2784 nfs_xid = base; 2785 } 2786 2787 /* 2788 * Skip zero xid if it should ever happen. 2789 */ 2790 if (__predict_false(++nfs_xid == 0)) 2791 nfs_xid++; 2792 newxid = nfs_xid; 2793 simple_unlock(&nfs_xidlock); 2794 2795 return txdr_unsigned(newxid); 2796 } 2797 2798 /* 2799 * assign a new xid for existing request. 2800 * used for NFSERR_JUKEBOX handling. 2801 */ 2802 void 2803 nfs_renewxid(struct nfsreq *req) 2804 { 2805 u_int32_t xid; 2806 int off; 2807 2808 xid = nfs_getxid(); 2809 if (req->r_nmp->nm_sotype == SOCK_STREAM) 2810 off = sizeof(u_int32_t); /* RPC record mark */ 2811 else 2812 off = 0; 2813 2814 m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2815 req->r_xid = xid; 2816 } 2817
Indexes created Thu Oct 02 14:10:14 GMT 2025