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sys/nfs/nfs_subs.c
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1 /* $NetBSD: nfs_subs.c,v 1.132.2.5 2005/03/16 11:54:49 tron 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 1.132.2.5 2005/03/16 11:54:49 tron 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 #define _NFSDC_MTX(np) (&NFSTOV(np)->v_interlock) 1218 #define NFSDC_LOCK(np) simple_lock(_NFSDC_MTX(np)) 1219 #define NFSDC_UNLOCK(np) simple_unlock(_NFSDC_MTX(np)) 1220 #define NFSDC_ASSERT_LOCKED(np) LOCK_ASSERT(simple_lock_held(_NFSDC_MTX(np))) 1221 1222 void 1223 nfs_initdircache(vp) 1224 struct vnode *vp; 1225 { 1226 struct nfsnode *np = VTONFS(vp); 1227 struct nfsdirhashhead *dircache; 1228 1229 dircache = hashinit(NFS_DIRHASHSIZ, HASH_LIST, M_NFSDIROFF, 1230 M_WAITOK, &nfsdirhashmask); 1231 1232 NFSDC_LOCK(np); 1233 if (np->n_dircache == NULL) { 1234 np->n_dircachesize = 0; 1235 np->n_dblkno = 1; 1236 np->n_dircache = dircache; 1237 dircache = NULL; 1238 TAILQ_INIT(&np->n_dirchain); 1239 } 1240 NFSDC_UNLOCK(np); 1241 if (dircache) 1242 hashdone(dircache, M_NFSDIROFF); 1243 } 1244 1245 void 1246 nfs_initdirxlatecookie(vp) 1247 struct vnode *vp; 1248 { 1249 struct nfsnode *np = VTONFS(vp); 1250 unsigned *dirgens; 1251 1252 KASSERT(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_XLATECOOKIE); 1253 1254 dirgens = malloc(NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1255 M_WAITOK|M_ZERO); 1256 NFSDC_LOCK(np); 1257 if (np->n_dirgens == NULL) { 1258 np->n_dirgens = dirgens; 1259 dirgens = NULL; 1260 } 1261 NFSDC_UNLOCK(np); 1262 if (dirgens) 1263 free(dirgens, M_NFSDIROFF); 1264 } 1265 1266 static const struct nfsdircache dzero; 1267 1268 static void nfs_unlinkdircache __P((struct nfsnode *np, struct nfsdircache *)); 1269 static void nfs_putdircache_unlocked __P((struct nfsnode *, 1270 struct nfsdircache *)); 1271 1272 static void 1273 nfs_unlinkdircache(np, ndp) 1274 struct nfsnode *np; 1275 struct nfsdircache *ndp; 1276 { 1277 1278 NFSDC_ASSERT_LOCKED(np); 1279 KASSERT(ndp != &dzero); 1280 1281 if (LIST_NEXT(ndp, dc_hash) == (void *)-1) 1282 return; 1283 1284 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1285 LIST_REMOVE(ndp, dc_hash); 1286 LIST_NEXT(ndp, dc_hash) = (void *)-1; /* mark as unlinked */ 1287 1288 nfs_putdircache_unlocked(np, ndp); 1289 } 1290 1291 void 1292 nfs_putdircache(np, ndp) 1293 struct nfsnode *np; 1294 struct nfsdircache *ndp; 1295 { 1296 int ref; 1297 1298 if (ndp == &dzero) 1299 return; 1300 1301 KASSERT(ndp->dc_refcnt > 0); 1302 NFSDC_LOCK(np); 1303 ref = --ndp->dc_refcnt; 1304 NFSDC_UNLOCK(np); 1305 1306 if (ref == 0) 1307 free(ndp, M_NFSDIROFF); 1308 } 1309 1310 static void 1311 nfs_putdircache_unlocked(np, ndp) 1312 struct nfsnode *np; 1313 struct nfsdircache *ndp; 1314 { 1315 int ref; 1316 1317 NFSDC_ASSERT_LOCKED(np); 1318 1319 if (ndp == &dzero) 1320 return; 1321 1322 KASSERT(ndp->dc_refcnt > 0); 1323 ref = --ndp->dc_refcnt; 1324 if (ref == 0) 1325 free(ndp, M_NFSDIROFF); 1326 } 1327 1328 struct nfsdircache * 1329 nfs_searchdircache(vp, off, do32, hashent) 1330 struct vnode *vp; 1331 off_t off; 1332 int do32; 1333 int *hashent; 1334 { 1335 struct nfsdirhashhead *ndhp; 1336 struct nfsdircache *ndp = NULL; 1337 struct nfsnode *np = VTONFS(vp); 1338 unsigned ent; 1339 1340 /* 1341 * Zero is always a valid cookie. 1342 */ 1343 if (off == 0) 1344 /* LINTED const cast away */ 1345 return (struct nfsdircache *)&dzero; 1346 1347 if (!np->n_dircache) 1348 return NULL; 1349 1350 /* 1351 * We use a 32bit cookie as search key, directly reconstruct 1352 * the hashentry. Else use the hashfunction. 1353 */ 1354 if (do32) { 1355 ent = (u_int32_t)off >> 24; 1356 if (ent >= NFS_DIRHASHSIZ) 1357 return NULL; 1358 ndhp = &np->n_dircache[ent]; 1359 } else { 1360 ndhp = NFSDIRHASH(np, off); 1361 } 1362 1363 if (hashent) 1364 *hashent = (int)(ndhp - np->n_dircache); 1365 1366 NFSDC_LOCK(np); 1367 if (do32) { 1368 LIST_FOREACH(ndp, ndhp, dc_hash) { 1369 if (ndp->dc_cookie32 == (u_int32_t)off) { 1370 /* 1371 * An invalidated entry will become the 1372 * start of a new block fetched from 1373 * the server. 1374 */ 1375 if (ndp->dc_flags & NFSDC_INVALID) { 1376 ndp->dc_blkcookie = ndp->dc_cookie; 1377 ndp->dc_blkno = np->n_dblkno++; 1378 ndp->dc_entry = 0; 1379 ndp->dc_flags &= ~NFSDC_INVALID; 1380 } 1381 break; 1382 } 1383 } 1384 } else { 1385 LIST_FOREACH(ndp, ndhp, dc_hash) { 1386 if (ndp->dc_cookie == off) 1387 break; 1388 } 1389 } 1390 if (ndp != NULL) 1391 ndp->dc_refcnt++; 1392 NFSDC_UNLOCK(np); 1393 return ndp; 1394 } 1395 1396 1397 struct nfsdircache * 1398 nfs_enterdircache(vp, off, blkoff, en, blkno) 1399 struct vnode *vp; 1400 off_t off, blkoff; 1401 int en; 1402 daddr_t blkno; 1403 { 1404 struct nfsnode *np = VTONFS(vp); 1405 struct nfsdirhashhead *ndhp; 1406 struct nfsdircache *ndp = NULL; 1407 struct nfsdircache *newndp = NULL; 1408 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1409 int hashent, gen, overwrite; 1410 1411 /* 1412 * XXX refuse entries for offset 0. amd(8) erroneously sets 1413 * cookie 0 for the '.' entry, making this necessary. This 1414 * isn't so bad, as 0 is a special case anyway. 1415 */ 1416 if (off == 0) 1417 /* LINTED const cast away */ 1418 return (struct nfsdircache *)&dzero; 1419 1420 if (!np->n_dircache) 1421 /* 1422 * XXX would like to do this in nfs_nget but vtype 1423 * isn't known at that time. 1424 */ 1425 nfs_initdircache(vp); 1426 1427 if ((nmp->nm_flag & NFSMNT_XLATECOOKIE) && !np->n_dirgens) 1428 nfs_initdirxlatecookie(vp); 1429 1430 retry: 1431 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1432 1433 NFSDC_LOCK(np); 1434 if (ndp && (ndp->dc_flags & NFSDC_INVALID) == 0) { 1435 /* 1436 * Overwriting an old entry. Check if it's the same. 1437 * If so, just return. If not, remove the old entry. 1438 */ 1439 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1440 goto done; 1441 nfs_unlinkdircache(np, ndp); 1442 nfs_putdircache_unlocked(np, ndp); 1443 ndp = NULL; 1444 } 1445 1446 ndhp = &np->n_dircache[hashent]; 1447 1448 if (!ndp) { 1449 if (newndp == NULL) { 1450 NFSDC_UNLOCK(np); 1451 newndp = malloc(sizeof(*ndp), M_NFSDIROFF, M_WAITOK); 1452 newndp->dc_refcnt = 1; 1453 LIST_NEXT(newndp, dc_hash) = (void *)-1; 1454 goto retry; 1455 } 1456 ndp = newndp; 1457 newndp = NULL; 1458 overwrite = 0; 1459 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1460 /* 1461 * We're allocating a new entry, so bump the 1462 * generation number. 1463 */ 1464 gen = ++np->n_dirgens[hashent]; 1465 if (gen == 0) { 1466 np->n_dirgens[hashent]++; 1467 gen++; 1468 } 1469 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1470 } 1471 } else 1472 overwrite = 1; 1473 1474 /* 1475 * If the entry number is 0, we are at the start of a new block, so 1476 * allocate a new blocknumber. 1477 */ 1478 if (en == 0) 1479 ndp->dc_blkno = np->n_dblkno++; 1480 else 1481 ndp->dc_blkno = blkno; 1482 1483 ndp->dc_cookie = off; 1484 ndp->dc_blkcookie = blkoff; 1485 ndp->dc_entry = en; 1486 ndp->dc_flags = 0; 1487 1488 if (overwrite) 1489 goto done; 1490 1491 /* 1492 * If the maximum directory cookie cache size has been reached 1493 * for this node, take one off the front. The idea is that 1494 * directories are typically read front-to-back once, so that 1495 * the oldest entries can be thrown away without much performance 1496 * loss. 1497 */ 1498 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1499 nfs_unlinkdircache(np, TAILQ_FIRST(&np->n_dirchain)); 1500 } else 1501 np->n_dircachesize++; 1502 1503 KASSERT(ndp->dc_refcnt == 1); 1504 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1505 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1506 ndp->dc_refcnt++; 1507 done: 1508 KASSERT(ndp->dc_refcnt > 0); 1509 NFSDC_UNLOCK(np); 1510 if (newndp) 1511 nfs_putdircache(np, newndp); 1512 return ndp; 1513 } 1514 1515 void 1516 nfs_invaldircache(vp, forcefree) 1517 struct vnode *vp; 1518 int forcefree; 1519 { 1520 struct nfsnode *np = VTONFS(vp); 1521 struct nfsdircache *ndp = NULL; 1522 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1523 1524 #ifdef DIAGNOSTIC 1525 if (vp->v_type != VDIR) 1526 panic("nfs: invaldircache: not dir"); 1527 #endif 1528 1529 if (!np->n_dircache) 1530 return; 1531 1532 NFSDC_LOCK(np); 1533 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1534 while ((ndp = TAILQ_FIRST(&np->n_dirchain)) != NULL) { 1535 KASSERT(!forcefree || ndp->dc_refcnt == 1); 1536 nfs_unlinkdircache(np, ndp); 1537 } 1538 np->n_dircachesize = 0; 1539 if (forcefree && np->n_dirgens) { 1540 FREE(np->n_dirgens, M_NFSDIROFF); 1541 np->n_dirgens = NULL; 1542 } 1543 } else { 1544 TAILQ_FOREACH(ndp, &np->n_dirchain, dc_chain) 1545 ndp->dc_flags |= NFSDC_INVALID; 1546 } 1547 1548 np->n_dblkno = 1; 1549 NFSDC_UNLOCK(np); 1550 } 1551 1552 /* 1553 * Called once before VFS init to initialize shared and 1554 * server-specific data structures. 1555 */ 1556 void 1557 nfs_init() 1558 { 1559 nfsrtt.pos = 0; 1560 rpc_vers = txdr_unsigned(RPC_VER2); 1561 rpc_call = txdr_unsigned(RPC_CALL); 1562 rpc_reply = txdr_unsigned(RPC_REPLY); 1563 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1564 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1565 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1566 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1567 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1568 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1569 nfs_prog = txdr_unsigned(NFS_PROG); 1570 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1571 nfs_true = txdr_unsigned(TRUE); 1572 nfs_false = txdr_unsigned(FALSE); 1573 nfs_xdrneg1 = txdr_unsigned(-1); 1574 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1575 if (nfs_ticks < 1) 1576 nfs_ticks = 1; 1577 #ifdef NFSSERVER 1578 nfsrv_init(0); /* Init server data structures */ 1579 nfsrv_initcache(); /* Init the server request cache */ 1580 pool_init(&nfs_srvdesc_pool, sizeof(struct nfsrv_descript), 1581 0, 0, 0, "nfsrvdescpl", &pool_allocator_nointr); 1582 #endif /* NFSSERVER */ 1583 1584 #if defined(NFSSERVER) || !defined(NFS_V2_ONLY) 1585 /* 1586 * Initialize the nqnfs data structures. 1587 */ 1588 if (nqnfsstarttime == 0) { 1589 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1590 + nqsrv_clockskew + nqsrv_writeslack; 1591 NQLOADNOVRAM(nqnfsstarttime); 1592 CIRCLEQ_INIT(&nqtimerhead); 1593 nqfhhashtbl = hashinit(NQLCHSZ, HASH_LIST, M_NQLEASE, 1594 M_WAITOK, &nqfhhash); 1595 } 1596 #endif 1597 1598 exithook_establish(nfs_exit, NULL); 1599 1600 /* 1601 * Initialize reply list and start timer 1602 */ 1603 TAILQ_INIT(&nfs_reqq); 1604 nfs_timer(NULL); 1605 MOWNER_ATTACH(&nfs_mowner); 1606 1607 #ifdef NFS 1608 /* Initialize the kqueue structures */ 1609 nfs_kqinit(); 1610 /* Initialize the iod structures */ 1611 nfs_iodinit(); 1612 #endif 1613 } 1614 1615 #ifdef NFS 1616 /* 1617 * Called once at VFS init to initialize client-specific data structures. 1618 */ 1619 void 1620 nfs_vfs_init() 1621 { 1622 nfs_nhinit(); /* Init the nfsnode table */ 1623 nfs_commitsize = uvmexp.npages << (PAGE_SHIFT - 4); 1624 } 1625 1626 void 1627 nfs_vfs_reinit() 1628 { 1629 nfs_nhreinit(); 1630 } 1631 1632 void 1633 nfs_vfs_done() 1634 { 1635 nfs_nhdone(); 1636 } 1637 1638 /* 1639 * Attribute cache routines. 1640 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1641 * that are on the mbuf list 1642 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1643 * error otherwise 1644 */ 1645 1646 /* 1647 * Load the attribute cache (that lives in the nfsnode entry) with 1648 * the values on the mbuf list and 1649 * Iff vap not NULL 1650 * copy the attributes to *vaper 1651 */ 1652 int 1653 nfsm_loadattrcache(vpp, mdp, dposp, vaper, flags) 1654 struct vnode **vpp; 1655 struct mbuf **mdp; 1656 caddr_t *dposp; 1657 struct vattr *vaper; 1658 int flags; 1659 { 1660 int32_t t1; 1661 caddr_t cp2; 1662 int error = 0; 1663 struct mbuf *md; 1664 int v3 = NFS_ISV3(*vpp); 1665 1666 md = *mdp; 1667 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1668 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1669 if (error) 1670 return (error); 1671 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); 1672 } 1673 1674 int 1675 nfs_loadattrcache(vpp, fp, vaper, flags) 1676 struct vnode **vpp; 1677 struct nfs_fattr *fp; 1678 struct vattr *vaper; 1679 int flags; 1680 { 1681 struct vnode *vp = *vpp; 1682 struct vattr *vap; 1683 int v3 = NFS_ISV3(vp); 1684 enum vtype vtyp; 1685 u_short vmode; 1686 struct timespec mtime; 1687 struct vnode *nvp; 1688 int32_t rdev; 1689 struct nfsnode *np; 1690 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1691 uid_t uid; 1692 gid_t gid; 1693 1694 if (v3) { 1695 vtyp = nfsv3tov_type(fp->fa_type); 1696 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1697 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 1698 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 1699 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1700 } else { 1701 vtyp = nfsv2tov_type(fp->fa_type); 1702 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1703 if (vtyp == VNON || vtyp == VREG) 1704 vtyp = IFTOVT(vmode); 1705 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1706 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1707 1708 /* 1709 * Really ugly NFSv2 kludge. 1710 */ 1711 if (vtyp == VCHR && rdev == 0xffffffff) 1712 vtyp = VFIFO; 1713 } 1714 1715 vmode &= ALLPERMS; 1716 1717 /* 1718 * If v_type == VNON it is a new node, so fill in the v_type, 1719 * n_mtime fields. Check to see if it represents a special 1720 * device, and if so, check for a possible alias. Once the 1721 * correct vnode has been obtained, fill in the rest of the 1722 * information. 1723 */ 1724 np = VTONFS(vp); 1725 if (vp->v_type == VNON) { 1726 vp->v_type = vtyp; 1727 if (vp->v_type == VFIFO) { 1728 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1729 vp->v_op = fifo_nfsv2nodeop_p; 1730 } else if (vp->v_type == VREG) { 1731 lockinit(&np->n_commitlock, PINOD, "nfsclock", 0, 0); 1732 } else if (vp->v_type == VCHR || vp->v_type == VBLK) { 1733 vp->v_op = spec_nfsv2nodeop_p; 1734 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1735 if (nvp) { 1736 /* 1737 * Discard unneeded vnode, but save its nfsnode. 1738 * Since the nfsnode does not have a lock, its 1739 * vnode lock has to be carried over. 1740 */ 1741 /* 1742 * XXX is the old node sure to be locked here? 1743 */ 1744 KASSERT(lockstatus(&vp->v_lock) == 1745 LK_EXCLUSIVE); 1746 nvp->v_data = vp->v_data; 1747 vp->v_data = NULL; 1748 VOP_UNLOCK(vp, 0); 1749 vp->v_op = spec_vnodeop_p; 1750 vrele(vp); 1751 vgone(vp); 1752 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, 1753 &nvp->v_interlock); 1754 /* 1755 * Reinitialize aliased node. 1756 */ 1757 np->n_vnode = nvp; 1758 *vpp = vp = nvp; 1759 } 1760 } 1761 np->n_mtime = mtime; 1762 } 1763 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1764 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1765 vap = np->n_vattr; 1766 1767 /* 1768 * Invalidate access cache if uid, gid or mode changed. 1769 */ 1770 if (np->n_accstamp != -1 && 1771 (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode)) 1772 np->n_accstamp = -1; 1773 1774 vap->va_type = vtyp; 1775 vap->va_mode = vmode; 1776 vap->va_rdev = (dev_t)rdev; 1777 vap->va_mtime = mtime; 1778 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1779 switch (vtyp) { 1780 case VDIR: 1781 vap->va_blocksize = NFS_DIRFRAGSIZ; 1782 break; 1783 case VBLK: 1784 vap->va_blocksize = BLKDEV_IOSIZE; 1785 break; 1786 case VCHR: 1787 vap->va_blocksize = MAXBSIZE; 1788 break; 1789 default: 1790 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1791 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1792 break; 1793 } 1794 if (v3) { 1795 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1796 vap->va_uid = uid; 1797 vap->va_gid = gid; 1798 vap->va_size = fxdr_hyper(&fp->fa3_size); 1799 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1800 vap->va_fileid = fxdr_unsigned(int32_t, 1801 fp->fa3_fileid.nfsuquad[1]); 1802 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1803 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1804 vap->va_flags = 0; 1805 vap->va_filerev = 0; 1806 } else { 1807 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1808 vap->va_uid = uid; 1809 vap->va_gid = gid; 1810 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1811 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1812 * NFS_FABLKSIZE; 1813 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1814 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1815 vap->va_flags = 0; 1816 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1817 fp->fa2_ctime.nfsv2_sec); 1818 vap->va_ctime.tv_nsec = 0; 1819 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1820 vap->va_filerev = 0; 1821 } 1822 if (vap->va_size != np->n_size) { 1823 if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { 1824 vap->va_size = np->n_size; 1825 } else { 1826 np->n_size = vap->va_size; 1827 if (vap->va_type == VREG) { 1828 /* 1829 * we can't free pages if NAC_NOTRUNC because 1830 * the pages can be owned by ourselves. 1831 */ 1832 if (flags & NAC_NOTRUNC) { 1833 np->n_flag |= NTRUNCDELAYED; 1834 } else { 1835 simple_lock(&vp->v_interlock); 1836 (void)VOP_PUTPAGES(vp, 0, 1837 0, PGO_SYNCIO | PGO_CLEANIT | 1838 PGO_FREE | PGO_ALLPAGES); 1839 uvm_vnp_setsize(vp, np->n_size); 1840 } 1841 } 1842 } 1843 } 1844 np->n_attrstamp = time.tv_sec; 1845 if (vaper != NULL) { 1846 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(*vap)); 1847 if (np->n_flag & NCHG) { 1848 if (np->n_flag & NACC) 1849 vaper->va_atime = np->n_atim; 1850 if (np->n_flag & NUPD) 1851 vaper->va_mtime = np->n_mtim; 1852 } 1853 } 1854 return (0); 1855 } 1856 1857 /* 1858 * Check the time stamp 1859 * If the cache is valid, copy contents to *vap and return 0 1860 * otherwise return an error 1861 */ 1862 int 1863 nfs_getattrcache(vp, vaper) 1864 struct vnode *vp; 1865 struct vattr *vaper; 1866 { 1867 struct nfsnode *np = VTONFS(vp); 1868 struct vattr *vap; 1869 1870 if (np->n_attrstamp == 0 || 1871 (time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1872 nfsstats.attrcache_misses++; 1873 return (ENOENT); 1874 } 1875 nfsstats.attrcache_hits++; 1876 vap = np->n_vattr; 1877 if (vap->va_size != np->n_size) { 1878 if (vap->va_type == VREG) { 1879 if (np->n_flag & NMODIFIED) { 1880 if (vap->va_size < np->n_size) 1881 vap->va_size = np->n_size; 1882 else 1883 np->n_size = vap->va_size; 1884 } else 1885 np->n_size = vap->va_size; 1886 uvm_vnp_setsize(vp, np->n_size); 1887 } else 1888 np->n_size = vap->va_size; 1889 } 1890 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(struct vattr)); 1891 if (np->n_flag & NCHG) { 1892 if (np->n_flag & NACC) 1893 vaper->va_atime = np->n_atim; 1894 if (np->n_flag & NUPD) 1895 vaper->va_mtime = np->n_mtim; 1896 } 1897 return (0); 1898 } 1899 1900 void 1901 nfs_delayedtruncate(vp) 1902 struct vnode *vp; 1903 { 1904 struct nfsnode *np = VTONFS(vp); 1905 1906 if (np->n_flag & NTRUNCDELAYED) { 1907 np->n_flag &= ~NTRUNCDELAYED; 1908 simple_lock(&vp->v_interlock); 1909 (void)VOP_PUTPAGES(vp, 0, 1910 0, PGO_SYNCIO | PGO_CLEANIT | PGO_FREE | PGO_ALLPAGES); 1911 uvm_vnp_setsize(vp, np->n_size); 1912 } 1913 } 1914 1915 /* 1916 * Heuristic to see if the server XDR encodes directory cookies or not. 1917 * it is not supposed to, but a lot of servers may do this. Also, since 1918 * most/all servers will implement V2 as well, it is expected that they 1919 * may return just 32 bits worth of cookie information, so we need to 1920 * find out in which 32 bits this information is available. We do this 1921 * to avoid trouble with emulated binaries that can't handle 64 bit 1922 * directory offsets. 1923 */ 1924 1925 void 1926 nfs_cookieheuristic(vp, flagp, p, cred) 1927 struct vnode *vp; 1928 int *flagp; 1929 struct proc *p; 1930 struct ucred *cred; 1931 { 1932 struct uio auio; 1933 struct iovec aiov; 1934 caddr_t buf, cp; 1935 struct dirent *dp; 1936 off_t *cookies = NULL, *cop; 1937 int error, eof, nc, len; 1938 1939 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1940 1941 aiov.iov_base = buf; 1942 aiov.iov_len = NFS_DIRFRAGSIZ; 1943 auio.uio_iov = &aiov; 1944 auio.uio_iovcnt = 1; 1945 auio.uio_rw = UIO_READ; 1946 auio.uio_segflg = UIO_SYSSPACE; 1947 auio.uio_procp = p; 1948 auio.uio_resid = NFS_DIRFRAGSIZ; 1949 auio.uio_offset = 0; 1950 1951 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1952 1953 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1954 if (error || len == 0) { 1955 FREE(buf, M_TEMP); 1956 if (cookies) 1957 free(cookies, M_TEMP); 1958 return; 1959 } 1960 1961 /* 1962 * Find the first valid entry and look at its offset cookie. 1963 */ 1964 1965 cp = buf; 1966 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1967 dp = (struct dirent *)cp; 1968 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1969 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1970 *flagp |= NFSMNT_SWAPCOOKIE; 1971 nfs_invaldircache(vp, 0); 1972 nfs_vinvalbuf(vp, 0, cred, p, 1); 1973 } 1974 break; 1975 } 1976 cop++; 1977 cp += dp->d_reclen; 1978 } 1979 1980 FREE(buf, M_TEMP); 1981 free(cookies, M_TEMP); 1982 } 1983 #endif /* NFS */ 1984 1985 /* 1986 * Set up nameidata for a lookup() call and do it. 1987 * 1988 * If pubflag is set, this call is done for a lookup operation on the 1989 * public filehandle. In that case we allow crossing mountpoints and 1990 * absolute pathnames. However, the caller is expected to check that 1991 * the lookup result is within the public fs, and deny access if 1992 * it is not. 1993 */ 1994 int 1995 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1996 struct nameidata *ndp; 1997 fhandle_t *fhp; 1998 uint32_t len; 1999 struct nfssvc_sock *slp; 2000 struct mbuf *nam; 2001 struct mbuf **mdp; 2002 caddr_t *dposp; 2003 struct vnode **retdirp; 2004 struct proc *p; 2005 int kerbflag, pubflag; 2006 { 2007 int i, rem; 2008 struct mbuf *md; 2009 char *fromcp, *tocp, *cp; 2010 struct iovec aiov; 2011 struct uio auio; 2012 struct vnode *dp; 2013 int error, rdonly, linklen; 2014 struct componentname *cnp = &ndp->ni_cnd; 2015 2016 *retdirp = (struct vnode *)0; 2017 2018 if ((len + 1) > MAXPATHLEN) 2019 return (ENAMETOOLONG); 2020 cnp->cn_pnbuf = PNBUF_GET(); 2021 2022 /* 2023 * Copy the name from the mbuf list to ndp->ni_pnbuf 2024 * and set the various ndp fields appropriately. 2025 */ 2026 fromcp = *dposp; 2027 tocp = cnp->cn_pnbuf; 2028 md = *mdp; 2029 rem = mtod(md, caddr_t) + md->m_len - fromcp; 2030 for (i = 0; i < len; i++) { 2031 while (rem == 0) { 2032 md = md->m_next; 2033 if (md == NULL) { 2034 error = EBADRPC; 2035 goto out; 2036 } 2037 fromcp = mtod(md, caddr_t); 2038 rem = md->m_len; 2039 } 2040 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 2041 error = EACCES; 2042 goto out; 2043 } 2044 *tocp++ = *fromcp++; 2045 rem--; 2046 } 2047 *tocp = '\0'; 2048 *mdp = md; 2049 *dposp = fromcp; 2050 len = nfsm_rndup(len)-len; 2051 if (len > 0) { 2052 if (rem >= len) 2053 *dposp += len; 2054 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 2055 goto out; 2056 } 2057 2058 /* 2059 * Extract and set starting directory. 2060 */ 2061 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 2062 nam, &rdonly, kerbflag, pubflag); 2063 if (error) 2064 goto out; 2065 if (dp->v_type != VDIR) { 2066 vrele(dp); 2067 error = ENOTDIR; 2068 goto out; 2069 } 2070 2071 if (rdonly) 2072 cnp->cn_flags |= RDONLY; 2073 2074 *retdirp = dp; 2075 2076 if (pubflag) { 2077 /* 2078 * Oh joy. For WebNFS, handle those pesky '%' escapes, 2079 * and the 'native path' indicator. 2080 */ 2081 cp = PNBUF_GET(); 2082 fromcp = cnp->cn_pnbuf; 2083 tocp = cp; 2084 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 2085 switch ((unsigned char)*fromcp) { 2086 case WEBNFS_NATIVE_CHAR: 2087 /* 2088 * 'Native' path for us is the same 2089 * as a path according to the NFS spec, 2090 * just skip the escape char. 2091 */ 2092 fromcp++; 2093 break; 2094 /* 2095 * More may be added in the future, range 0x80-0xff 2096 */ 2097 default: 2098 error = EIO; 2099 PNBUF_PUT(cp); 2100 goto out; 2101 } 2102 } 2103 /* 2104 * Translate the '%' escapes, URL-style. 2105 */ 2106 while (*fromcp != '\0') { 2107 if (*fromcp == WEBNFS_ESC_CHAR) { 2108 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 2109 fromcp++; 2110 *tocp++ = HEXSTRTOI(fromcp); 2111 fromcp += 2; 2112 continue; 2113 } else { 2114 error = ENOENT; 2115 PNBUF_PUT(cp); 2116 goto out; 2117 } 2118 } else 2119 *tocp++ = *fromcp++; 2120 } 2121 *tocp = '\0'; 2122 PNBUF_PUT(cnp->cn_pnbuf); 2123 cnp->cn_pnbuf = cp; 2124 } 2125 2126 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 2127 ndp->ni_segflg = UIO_SYSSPACE; 2128 ndp->ni_rootdir = rootvnode; 2129 2130 if (pubflag) { 2131 ndp->ni_loopcnt = 0; 2132 if (cnp->cn_pnbuf[0] == '/') 2133 dp = rootvnode; 2134 } else { 2135 cnp->cn_flags |= NOCROSSMOUNT; 2136 } 2137 2138 cnp->cn_proc = p; 2139 VREF(dp); 2140 2141 for (;;) { 2142 cnp->cn_nameptr = cnp->cn_pnbuf; 2143 ndp->ni_startdir = dp; 2144 /* 2145 * And call lookup() to do the real work 2146 */ 2147 error = lookup(ndp); 2148 if (error) { 2149 PNBUF_PUT(cnp->cn_pnbuf); 2150 return (error); 2151 } 2152 /* 2153 * Check for encountering a symbolic link 2154 */ 2155 if ((cnp->cn_flags & ISSYMLINK) == 0) { 2156 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 2157 cnp->cn_flags |= HASBUF; 2158 else 2159 PNBUF_PUT(cnp->cn_pnbuf); 2160 return (0); 2161 } else { 2162 if ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN)) 2163 VOP_UNLOCK(ndp->ni_dvp, 0); 2164 if (!pubflag) { 2165 error = EINVAL; 2166 break; 2167 } 2168 2169 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 2170 error = ELOOP; 2171 break; 2172 } 2173 if (ndp->ni_vp->v_mount->mnt_flag & MNT_SYMPERM) { 2174 error = VOP_ACCESS(ndp->ni_vp, VEXEC, cnp->cn_cred, 2175 cnp->cn_proc); 2176 if (error != 0) 2177 break; 2178 } 2179 if (ndp->ni_pathlen > 1) 2180 cp = PNBUF_GET(); 2181 else 2182 cp = cnp->cn_pnbuf; 2183 aiov.iov_base = cp; 2184 aiov.iov_len = MAXPATHLEN; 2185 auio.uio_iov = &aiov; 2186 auio.uio_iovcnt = 1; 2187 auio.uio_offset = 0; 2188 auio.uio_rw = UIO_READ; 2189 auio.uio_segflg = UIO_SYSSPACE; 2190 auio.uio_procp = (struct proc *)0; 2191 auio.uio_resid = MAXPATHLEN; 2192 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 2193 if (error) { 2194 badlink: 2195 if (ndp->ni_pathlen > 1) 2196 PNBUF_PUT(cp); 2197 break; 2198 } 2199 linklen = MAXPATHLEN - auio.uio_resid; 2200 if (linklen == 0) { 2201 error = ENOENT; 2202 goto badlink; 2203 } 2204 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 2205 error = ENAMETOOLONG; 2206 goto badlink; 2207 } 2208 if (ndp->ni_pathlen > 1) { 2209 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 2210 PNBUF_PUT(cnp->cn_pnbuf); 2211 cnp->cn_pnbuf = cp; 2212 } else 2213 cnp->cn_pnbuf[linklen] = '\0'; 2214 ndp->ni_pathlen += linklen; 2215 vput(ndp->ni_vp); 2216 dp = ndp->ni_dvp; 2217 /* 2218 * Check if root directory should replace current directory. 2219 */ 2220 if (cnp->cn_pnbuf[0] == '/') { 2221 vrele(dp); 2222 dp = ndp->ni_rootdir; 2223 VREF(dp); 2224 } 2225 } 2226 } 2227 vrele(ndp->ni_dvp); 2228 vput(ndp->ni_vp); 2229 ndp->ni_vp = NULL; 2230 out: 2231 PNBUF_PUT(cnp->cn_pnbuf); 2232 return (error); 2233 } 2234 2235 /* 2236 * A fiddled version of m_adj() that ensures null fill to a 32-bit 2237 * boundary and only trims off the back end 2238 * 2239 * 1. trim off 'len' bytes as m_adj(mp, -len). 2240 * 2. add zero-padding 'nul' bytes at the end of the mbuf chain. 2241 */ 2242 void 2243 nfs_zeropad(mp, len, nul) 2244 struct mbuf *mp; 2245 int len; 2246 int nul; 2247 { 2248 struct mbuf *m; 2249 int count; 2250 2251 /* 2252 * Trim from tail. Scan the mbuf chain, 2253 * calculating its length and finding the last mbuf. 2254 * If the adjustment only affects this mbuf, then just 2255 * adjust and return. Otherwise, rescan and truncate 2256 * after the remaining size. 2257 */ 2258 count = 0; 2259 m = mp; 2260 for (;;) { 2261 count += m->m_len; 2262 if (m->m_next == NULL) 2263 break; 2264 m = m->m_next; 2265 } 2266 2267 KDASSERT(count >= len); 2268 2269 if (m->m_len >= len) { 2270 m->m_len -= len; 2271 } else { 2272 count -= len; 2273 /* 2274 * Correct length for chain is "count". 2275 * Find the mbuf with last data, adjust its length, 2276 * and toss data from remaining mbufs on chain. 2277 */ 2278 for (m = mp; m; m = m->m_next) { 2279 if (m->m_len >= count) { 2280 m->m_len = count; 2281 break; 2282 } 2283 count -= m->m_len; 2284 } 2285 m_freem(m->m_next); 2286 m->m_next = NULL; 2287 } 2288 2289 KDASSERT(m->m_next == NULL); 2290 2291 /* 2292 * zero-padding. 2293 */ 2294 if (nul > 0) { 2295 char *cp; 2296 int i; 2297 2298 if (M_ROMAP(m) || M_TRAILINGSPACE(m) < nul) { 2299 struct mbuf *n; 2300 2301 KDASSERT(MLEN >= nul); 2302 n = m_get(M_WAIT, MT_DATA); 2303 MCLAIM(n, &nfs_mowner); 2304 n->m_len = nul; 2305 n->m_next = NULL; 2306 m->m_next = n; 2307 cp = mtod(n, caddr_t); 2308 } else { 2309 cp = mtod(m, caddr_t) + m->m_len; 2310 m->m_len += nul; 2311 } 2312 for (i = 0; i < nul; i++) 2313 *cp++ = '\0'; 2314 } 2315 return; 2316 } 2317 2318 /* 2319 * Make these functions instead of macros, so that the kernel text size 2320 * doesn't get too big... 2321 */ 2322 void 2323 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2324 struct nfsrv_descript *nfsd; 2325 int before_ret; 2326 struct vattr *before_vap; 2327 int after_ret; 2328 struct vattr *after_vap; 2329 struct mbuf **mbp; 2330 char **bposp; 2331 { 2332 struct mbuf *mb = *mbp; 2333 char *bpos = *bposp; 2334 u_int32_t *tl; 2335 2336 if (before_ret) { 2337 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2338 *tl = nfs_false; 2339 } else { 2340 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2341 *tl++ = nfs_true; 2342 txdr_hyper(before_vap->va_size, tl); 2343 tl += 2; 2344 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2345 tl += 2; 2346 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2347 } 2348 *bposp = bpos; 2349 *mbp = mb; 2350 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2351 } 2352 2353 void 2354 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2355 struct nfsrv_descript *nfsd; 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 struct nfs_fattr *fp; 2365 2366 if (after_ret) { 2367 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2368 *tl = nfs_false; 2369 } else { 2370 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2371 *tl++ = nfs_true; 2372 fp = (struct nfs_fattr *)tl; 2373 nfsm_srvfattr(nfsd, after_vap, fp); 2374 } 2375 *mbp = mb; 2376 *bposp = bpos; 2377 } 2378 2379 void 2380 nfsm_srvfattr(nfsd, vap, fp) 2381 struct nfsrv_descript *nfsd; 2382 struct vattr *vap; 2383 struct nfs_fattr *fp; 2384 { 2385 2386 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2387 fp->fa_uid = txdr_unsigned(vap->va_uid); 2388 fp->fa_gid = txdr_unsigned(vap->va_gid); 2389 if (nfsd->nd_flag & ND_NFSV3) { 2390 fp->fa_type = vtonfsv3_type(vap->va_type); 2391 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2392 txdr_hyper(vap->va_size, &fp->fa3_size); 2393 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2394 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2395 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2396 fp->fa3_fsid.nfsuquad[0] = 0; 2397 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2398 fp->fa3_fileid.nfsuquad[0] = 0; 2399 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2400 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2401 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2402 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2403 } else { 2404 fp->fa_type = vtonfsv2_type(vap->va_type); 2405 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2406 fp->fa2_size = txdr_unsigned(vap->va_size); 2407 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2408 if (vap->va_type == VFIFO) 2409 fp->fa2_rdev = 0xffffffff; 2410 else 2411 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2412 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2413 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2414 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2415 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2416 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2417 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2418 } 2419 } 2420 2421 /* 2422 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2423 * - look up fsid in mount list (if not found ret error) 2424 * - get vp and export rights by calling VFS_FHTOVP() 2425 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2426 * - if not lockflag unlock it with VOP_UNLOCK() 2427 */ 2428 int 2429 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2430 fhandle_t *fhp; 2431 int lockflag; 2432 struct vnode **vpp; 2433 struct ucred *cred; 2434 struct nfssvc_sock *slp; 2435 struct mbuf *nam; 2436 int *rdonlyp; 2437 int kerbflag; 2438 { 2439 struct mount *mp; 2440 int i; 2441 struct ucred *credanon; 2442 int error, exflags; 2443 struct sockaddr_in *saddr; 2444 2445 *vpp = (struct vnode *)0; 2446 2447 if (nfs_ispublicfh(fhp)) { 2448 if (!pubflag || !nfs_pub.np_valid) 2449 return (ESTALE); 2450 fhp = &nfs_pub.np_handle; 2451 } 2452 2453 mp = vfs_getvfs(&fhp->fh_fsid); 2454 if (!mp) 2455 return (ESTALE); 2456 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 2457 if (error) 2458 return (error); 2459 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2460 if (error) 2461 return (error); 2462 2463 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2464 saddr = mtod(nam, struct sockaddr_in *); 2465 if ((saddr->sin_family == AF_INET) && 2466 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2467 vput(*vpp); 2468 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2469 } 2470 #ifdef INET6 2471 if ((saddr->sin_family == AF_INET6) && 2472 ntohs(saddr->sin_port) >= IPV6PORT_RESERVED) { 2473 vput(*vpp); 2474 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2475 } 2476 #endif 2477 } 2478 /* 2479 * Check/setup credentials. 2480 */ 2481 if (exflags & MNT_EXKERB) { 2482 if (!kerbflag) { 2483 vput(*vpp); 2484 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2485 } 2486 } else if (kerbflag) { 2487 vput(*vpp); 2488 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2489 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2490 cred->cr_uid = credanon->cr_uid; 2491 cred->cr_gid = credanon->cr_gid; 2492 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2493 cred->cr_groups[i] = credanon->cr_groups[i]; 2494 cred->cr_ngroups = i; 2495 } 2496 if (exflags & MNT_EXRDONLY) 2497 *rdonlyp = 1; 2498 else 2499 *rdonlyp = 0; 2500 if (!lockflag) 2501 VOP_UNLOCK(*vpp, 0); 2502 return (0); 2503 } 2504 2505 /* 2506 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2507 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2508 * transformed this to all zeroes in both cases, so check for it. 2509 */ 2510 int 2511 nfs_ispublicfh(fhp) 2512 fhandle_t *fhp; 2513 { 2514 char *cp = (char *)fhp; 2515 int i; 2516 2517 for (i = 0; i < NFSX_V3FH; i++) 2518 if (*cp++ != 0) 2519 return (FALSE); 2520 return (TRUE); 2521 } 2522 2523 /* 2524 * This function compares two net addresses by family and returns TRUE 2525 * if they are the same host. 2526 * If there is any doubt, return FALSE. 2527 * The AF_INET family is handled as a special case so that address mbufs 2528 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2529 */ 2530 int 2531 netaddr_match(family, haddr, nam) 2532 int family; 2533 union nethostaddr *haddr; 2534 struct mbuf *nam; 2535 { 2536 struct sockaddr_in *inetaddr; 2537 2538 switch (family) { 2539 case AF_INET: 2540 inetaddr = mtod(nam, struct sockaddr_in *); 2541 if (inetaddr->sin_family == AF_INET && 2542 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2543 return (1); 2544 break; 2545 #ifdef INET6 2546 case AF_INET6: 2547 { 2548 struct sockaddr_in6 *sin6_1, *sin6_2; 2549 2550 sin6_1 = mtod(nam, struct sockaddr_in6 *); 2551 sin6_2 = mtod(haddr->had_nam, struct sockaddr_in6 *); 2552 if (sin6_1->sin6_family == AF_INET6 && 2553 IN6_ARE_ADDR_EQUAL(&sin6_1->sin6_addr, &sin6_2->sin6_addr)) 2554 return 1; 2555 } 2556 #endif 2557 #ifdef ISO 2558 case AF_ISO: 2559 { 2560 struct sockaddr_iso *isoaddr1, *isoaddr2; 2561 2562 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2563 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2564 if (isoaddr1->siso_family == AF_ISO && 2565 isoaddr1->siso_nlen > 0 && 2566 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2567 SAME_ISOADDR(isoaddr1, isoaddr2)) 2568 return (1); 2569 break; 2570 } 2571 #endif /* ISO */ 2572 default: 2573 break; 2574 }; 2575 return (0); 2576 } 2577 2578 /* 2579 * The write verifier has changed (probably due to a server reboot), so all 2580 * PG_NEEDCOMMIT pages will have to be written again. Since they are marked 2581 * as dirty or are being written out just now, all this takes is clearing 2582 * the PG_NEEDCOMMIT flag. Once done the new write verifier can be set for 2583 * the mount point. 2584 */ 2585 void 2586 nfs_clearcommit(mp) 2587 struct mount *mp; 2588 { 2589 struct vnode *vp; 2590 struct nfsnode *np; 2591 struct vm_page *pg; 2592 struct nfsmount *nmp = VFSTONFS(mp); 2593 2594 lockmgr(&nmp->nm_writeverflock, LK_EXCLUSIVE, NULL); 2595 2596 LIST_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 2597 KASSERT(vp->v_mount == mp); 2598 if (vp->v_type != VREG) 2599 continue; 2600 np = VTONFS(vp); 2601 np->n_pushlo = np->n_pushhi = np->n_pushedlo = 2602 np->n_pushedhi = 0; 2603 np->n_commitflags &= 2604 ~(NFS_COMMIT_PUSH_VALID | NFS_COMMIT_PUSHED_VALID); 2605 simple_lock(&vp->v_uobj.vmobjlock); 2606 TAILQ_FOREACH(pg, &vp->v_uobj.memq, listq) { 2607 pg->flags &= ~PG_NEEDCOMMIT; 2608 } 2609 simple_unlock(&vp->v_uobj.vmobjlock); 2610 } 2611 simple_lock(&nmp->nm_slock); 2612 nmp->nm_iflag &= ~NFSMNT_STALEWRITEVERF; 2613 simple_unlock(&nmp->nm_slock); 2614 lockmgr(&nmp->nm_writeverflock, LK_RELEASE, NULL); 2615 } 2616 2617 void 2618 nfs_merge_commit_ranges(vp) 2619 struct vnode *vp; 2620 { 2621 struct nfsnode *np = VTONFS(vp); 2622 2623 KASSERT(np->n_commitflags & NFS_COMMIT_PUSH_VALID); 2624 2625 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2626 np->n_pushedlo = np->n_pushlo; 2627 np->n_pushedhi = np->n_pushhi; 2628 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2629 } else { 2630 if (np->n_pushlo < np->n_pushedlo) 2631 np->n_pushedlo = np->n_pushlo; 2632 if (np->n_pushhi > np->n_pushedhi) 2633 np->n_pushedhi = np->n_pushhi; 2634 } 2635 2636 np->n_pushlo = np->n_pushhi = 0; 2637 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 2638 2639 #ifdef NFS_DEBUG_COMMIT 2640 printf("merge: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2641 (unsigned)np->n_pushedhi); 2642 #endif 2643 } 2644 2645 int 2646 nfs_in_committed_range(vp, off, len) 2647 struct vnode *vp; 2648 off_t off, len; 2649 { 2650 struct nfsnode *np = VTONFS(vp); 2651 off_t lo, hi; 2652 2653 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2654 return 0; 2655 lo = off; 2656 hi = lo + len; 2657 2658 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 2659 } 2660 2661 int 2662 nfs_in_tobecommitted_range(vp, off, len) 2663 struct vnode *vp; 2664 off_t off, len; 2665 { 2666 struct nfsnode *np = VTONFS(vp); 2667 off_t lo, hi; 2668 2669 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2670 return 0; 2671 lo = off; 2672 hi = lo + len; 2673 2674 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 2675 } 2676 2677 void 2678 nfs_add_committed_range(vp, off, len) 2679 struct vnode *vp; 2680 off_t off, len; 2681 { 2682 struct nfsnode *np = VTONFS(vp); 2683 off_t lo, hi; 2684 2685 lo = off; 2686 hi = lo + len; 2687 2688 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 2689 np->n_pushedlo = lo; 2690 np->n_pushedhi = hi; 2691 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 2692 } else { 2693 if (hi > np->n_pushedhi) 2694 np->n_pushedhi = hi; 2695 if (lo < np->n_pushedlo) 2696 np->n_pushedlo = lo; 2697 } 2698 #ifdef NFS_DEBUG_COMMIT 2699 printf("add: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2700 (unsigned)np->n_pushedhi); 2701 #endif 2702 } 2703 2704 void 2705 nfs_del_committed_range(vp, off, len) 2706 struct vnode *vp; 2707 off_t off, len; 2708 { 2709 struct nfsnode *np = VTONFS(vp); 2710 off_t lo, hi; 2711 2712 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 2713 return; 2714 2715 lo = off; 2716 hi = lo + len; 2717 2718 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 2719 return; 2720 if (lo <= np->n_pushedlo) 2721 np->n_pushedlo = hi; 2722 else if (hi >= np->n_pushedhi) 2723 np->n_pushedhi = lo; 2724 else { 2725 /* 2726 * XXX There's only one range. If the deleted range 2727 * is in the middle, pick the largest of the 2728 * contiguous ranges that it leaves. 2729 */ 2730 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 2731 np->n_pushedhi = lo; 2732 else 2733 np->n_pushedlo = hi; 2734 } 2735 #ifdef NFS_DEBUG_COMMIT 2736 printf("del: committed: %u - %u\n", (unsigned)np->n_pushedlo, 2737 (unsigned)np->n_pushedhi); 2738 #endif 2739 } 2740 2741 void 2742 nfs_add_tobecommitted_range(vp, off, len) 2743 struct vnode *vp; 2744 off_t off, len; 2745 { 2746 struct nfsnode *np = VTONFS(vp); 2747 off_t lo, hi; 2748 2749 lo = off; 2750 hi = lo + len; 2751 2752 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 2753 np->n_pushlo = lo; 2754 np->n_pushhi = hi; 2755 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 2756 } else { 2757 if (lo < np->n_pushlo) 2758 np->n_pushlo = lo; 2759 if (hi > np->n_pushhi) 2760 np->n_pushhi = hi; 2761 } 2762 #ifdef NFS_DEBUG_COMMIT 2763 printf("add: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2764 (unsigned)np->n_pushhi); 2765 #endif 2766 } 2767 2768 void 2769 nfs_del_tobecommitted_range(vp, off, len) 2770 struct vnode *vp; 2771 off_t off, len; 2772 { 2773 struct nfsnode *np = VTONFS(vp); 2774 off_t lo, hi; 2775 2776 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 2777 return; 2778 2779 lo = off; 2780 hi = lo + len; 2781 2782 if (lo > np->n_pushhi || hi < np->n_pushlo) 2783 return; 2784 2785 if (lo <= np->n_pushlo) 2786 np->n_pushlo = hi; 2787 else if (hi >= np->n_pushhi) 2788 np->n_pushhi = lo; 2789 else { 2790 /* 2791 * XXX There's only one range. If the deleted range 2792 * is in the middle, pick the largest of the 2793 * contiguous ranges that it leaves. 2794 */ 2795 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 2796 np->n_pushhi = lo; 2797 else 2798 np->n_pushlo = hi; 2799 } 2800 #ifdef NFS_DEBUG_COMMIT 2801 printf("del: tobecommitted: %u - %u\n", (unsigned)np->n_pushlo, 2802 (unsigned)np->n_pushhi); 2803 #endif 2804 } 2805 2806 /* 2807 * Map errnos to NFS error numbers. For Version 3 also filter out error 2808 * numbers not specified for the associated procedure. 2809 */ 2810 int 2811 nfsrv_errmap(nd, err) 2812 struct nfsrv_descript *nd; 2813 int err; 2814 { 2815 const short *defaulterrp, *errp; 2816 2817 if (nd->nd_flag & ND_NFSV3) { 2818 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2819 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2820 while (*++errp) { 2821 if (*errp == err) 2822 return (err); 2823 else if (*errp > err) 2824 break; 2825 } 2826 return ((int)*defaulterrp); 2827 } else 2828 return (err & 0xffff); 2829 } 2830 if (err <= ELAST) 2831 return ((int)nfsrv_v2errmap[err - 1]); 2832 return (NFSERR_IO); 2833 } 2834 2835 /* 2836 * Sort the group list in increasing numerical order. 2837 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2838 * that used to be here.) 2839 */ 2840 void 2841 nfsrvw_sort(list, num) 2842 gid_t *list; 2843 int num; 2844 { 2845 int i, j; 2846 gid_t v; 2847 2848 /* Insertion sort. */ 2849 for (i = 1; i < num; i++) { 2850 v = list[i]; 2851 /* find correct slot for value v, moving others up */ 2852 for (j = i; --j >= 0 && v < list[j];) 2853 list[j + 1] = list[j]; 2854 list[j + 1] = v; 2855 } 2856 } 2857 2858 /* 2859 * copy credentials making sure that the result can be compared with memcmp(). 2860 */ 2861 void 2862 nfsrv_setcred(incred, outcred) 2863 struct ucred *incred, *outcred; 2864 { 2865 int i; 2866 2867 memset((caddr_t)outcred, 0, sizeof (struct ucred)); 2868 outcred->cr_ref = 1; 2869 outcred->cr_uid = incred->cr_uid; 2870 outcred->cr_gid = incred->cr_gid; 2871 outcred->cr_ngroups = incred->cr_ngroups; 2872 for (i = 0; i < incred->cr_ngroups; i++) 2873 outcred->cr_groups[i] = incred->cr_groups[i]; 2874 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2875 } 2876 2877 u_int32_t 2878 nfs_getxid() 2879 { 2880 static u_int32_t base; 2881 static u_int32_t nfs_xid = 0; 2882 static struct simplelock nfs_xidlock = SIMPLELOCK_INITIALIZER; 2883 u_int32_t newxid; 2884 2885 simple_lock(&nfs_xidlock); 2886 /* 2887 * derive initial xid from system time 2888 * XXX time is invalid if root not yet mounted 2889 */ 2890 if (__predict_false(!base && (rootvp))) { 2891 struct timeval tv; 2892 2893 microtime(&tv); 2894 base = tv.tv_sec << 12; 2895 nfs_xid = base; 2896 } 2897 2898 /* 2899 * Skip zero xid if it should ever happen. 2900 */ 2901 if (__predict_false(++nfs_xid == 0)) 2902 nfs_xid++; 2903 newxid = nfs_xid; 2904 simple_unlock(&nfs_xidlock); 2905 2906 return txdr_unsigned(newxid); 2907 } 2908 2909 /* 2910 * assign a new xid for existing request. 2911 * used for NFSERR_JUKEBOX handling. 2912 */ 2913 void 2914 nfs_renewxid(struct nfsreq *req) 2915 { 2916 u_int32_t xid; 2917 int off; 2918 2919 xid = nfs_getxid(); 2920 if (req->r_nmp->nm_sotype == SOCK_STREAM) 2921 off = sizeof(u_int32_t); /* RPC record mark */ 2922 else 2923 off = 0; 2924 2925 m_copyback(req->r_mreq, off, sizeof(xid), (void *)&xid); 2926 req->r_xid = xid; 2927 }
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