nfs_srvsubs.c revision 33108
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_subs.c 8.3 (Berkeley) 1/4/94 37 * $Id: nfs_subs.c,v 1.49 1997/12/27 02:56:35 bde Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45 46#include "opt_diagnostic.h" 47 48#include <sys/param.h> 49#include <sys/buf.h> 50#include <sys/proc.h> 51#include <sys/systm.h> 52#include <sys/kernel.h> 53#include <sys/mount.h> 54#include <sys/vnode.h> 55#include <sys/namei.h> 56#include <sys/mbuf.h> 57#include <sys/socket.h> 58#include <sys/stat.h> 59#include <sys/malloc.h> 60#include <sys/sysent.h> 61#include <sys/syscall.h> 62 63#include <vm/vm.h> 64#include <vm/vm_object.h> 65#include <vm/vm_extern.h> 66#include <vm/vm_zone.h> 67 68#include <nfs/rpcv2.h> 69#include <nfs/nfsproto.h> 70#include <nfs/nfs.h> 71#include <nfs/nfsnode.h> 72#include <nfs/xdr_subs.h> 73#include <nfs/nfsm_subs.h> 74#include <nfs/nfsmount.h> 75#include <nfs/nqnfs.h> 76#include <nfs/nfsrtt.h> 77 78#include <miscfs/specfs/specdev.h> 79 80#include <netinet/in.h> 81#ifdef ISO 82#include <netiso/iso.h> 83#endif 84 85/* 86 * Data items converted to xdr at startup, since they are constant 87 * This is kinda hokey, but may save a little time doing byte swaps 88 */ 89u_long nfs_xdrneg1; 90u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 91 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 92 rpc_auth_kerb; 93u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 94 95/* And other global data */ 96static u_long nfs_xid = 0; 97static enum vtype nv2tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 99}; 100enum vtype nv3tov_type[8]= { 101 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 102}; 103 104int nfs_mount_type; 105int nfs_ticks; 106 107struct nfs_reqq nfs_reqq; 108struct nfssvc_sockhead nfssvc_sockhead; 109int nfssvc_sockhead_flag; 110struct nfsd_head nfsd_head; 111int nfsd_head_flag; 112struct nfs_bufq nfs_bufq; 113struct nqtimerhead nqtimerhead; 114struct nqfhhashhead *nqfhhashtbl; 115u_long nqfhhash; 116 117#ifndef NFS_NOSERVER 118/* 119 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 120 */ 121int nfsv3_procid[NFS_NPROCS] = { 122 NFSPROC_NULL, 123 NFSPROC_GETATTR, 124 NFSPROC_SETATTR, 125 NFSPROC_NOOP, 126 NFSPROC_LOOKUP, 127 NFSPROC_READLINK, 128 NFSPROC_READ, 129 NFSPROC_NOOP, 130 NFSPROC_WRITE, 131 NFSPROC_CREATE, 132 NFSPROC_REMOVE, 133 NFSPROC_RENAME, 134 NFSPROC_LINK, 135 NFSPROC_SYMLINK, 136 NFSPROC_MKDIR, 137 NFSPROC_RMDIR, 138 NFSPROC_READDIR, 139 NFSPROC_FSSTAT, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP 148}; 149 150#endif /* NFS_NOSERVER */ 151/* 152 * and the reverse mapping from generic to Version 2 procedure numbers 153 */ 154int nfsv2_procid[NFS_NPROCS] = { 155 NFSV2PROC_NULL, 156 NFSV2PROC_GETATTR, 157 NFSV2PROC_SETATTR, 158 NFSV2PROC_LOOKUP, 159 NFSV2PROC_NOOP, 160 NFSV2PROC_READLINK, 161 NFSV2PROC_READ, 162 NFSV2PROC_WRITE, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_MKDIR, 165 NFSV2PROC_SYMLINK, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_REMOVE, 168 NFSV2PROC_RMDIR, 169 NFSV2PROC_RENAME, 170 NFSV2PROC_LINK, 171 NFSV2PROC_READDIR, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_STATFS, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181}; 182 183#ifndef NFS_NOSERVER 184/* 185 * Maps errno values to nfs error numbers. 186 * Use NFSERR_IO as the catch all for ones not specifically defined in 187 * RFC 1094. 188 */ 189static u_char nfsrv_v2errmap[ELAST] = { 190 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 194 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 203 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, 207}; 208 209/* 210 * Maps errno values to nfs error numbers. 211 * Although it is not obvious whether or not NFS clients really care if 212 * a returned error value is in the specified list for the procedure, the 213 * safest thing to do is filter them appropriately. For Version 2, the 214 * X/Open XNFS document is the only specification that defines error values 215 * for each RPC (The RFC simply lists all possible error values for all RPCs), 216 * so I have decided to not do this for Version 2. 217 * The first entry is the default error return and the rest are the valid 218 * errors for that RPC in increasing numeric order. 219 */ 220static short nfsv3err_null[] = { 221 0, 222 0, 223}; 224 225static short nfsv3err_getattr[] = { 226 NFSERR_IO, 227 NFSERR_IO, 228 NFSERR_STALE, 229 NFSERR_BADHANDLE, 230 NFSERR_SERVERFAULT, 231 0, 232}; 233 234static short nfsv3err_setattr[] = { 235 NFSERR_IO, 236 NFSERR_PERM, 237 NFSERR_IO, 238 NFSERR_ACCES, 239 NFSERR_INVAL, 240 NFSERR_NOSPC, 241 NFSERR_ROFS, 242 NFSERR_DQUOT, 243 NFSERR_STALE, 244 NFSERR_BADHANDLE, 245 NFSERR_NOT_SYNC, 246 NFSERR_SERVERFAULT, 247 0, 248}; 249 250static short nfsv3err_lookup[] = { 251 NFSERR_IO, 252 NFSERR_NOENT, 253 NFSERR_IO, 254 NFSERR_ACCES, 255 NFSERR_NOTDIR, 256 NFSERR_NAMETOL, 257 NFSERR_STALE, 258 NFSERR_BADHANDLE, 259 NFSERR_SERVERFAULT, 260 0, 261}; 262 263static short nfsv3err_access[] = { 264 NFSERR_IO, 265 NFSERR_IO, 266 NFSERR_STALE, 267 NFSERR_BADHANDLE, 268 NFSERR_SERVERFAULT, 269 0, 270}; 271 272static short nfsv3err_readlink[] = { 273 NFSERR_IO, 274 NFSERR_IO, 275 NFSERR_ACCES, 276 NFSERR_INVAL, 277 NFSERR_STALE, 278 NFSERR_BADHANDLE, 279 NFSERR_NOTSUPP, 280 NFSERR_SERVERFAULT, 281 0, 282}; 283 284static short nfsv3err_read[] = { 285 NFSERR_IO, 286 NFSERR_IO, 287 NFSERR_NXIO, 288 NFSERR_ACCES, 289 NFSERR_INVAL, 290 NFSERR_STALE, 291 NFSERR_BADHANDLE, 292 NFSERR_SERVERFAULT, 293 0, 294}; 295 296static short nfsv3err_write[] = { 297 NFSERR_IO, 298 NFSERR_IO, 299 NFSERR_ACCES, 300 NFSERR_INVAL, 301 NFSERR_FBIG, 302 NFSERR_NOSPC, 303 NFSERR_ROFS, 304 NFSERR_DQUOT, 305 NFSERR_STALE, 306 NFSERR_BADHANDLE, 307 NFSERR_SERVERFAULT, 308 0, 309}; 310 311static short nfsv3err_create[] = { 312 NFSERR_IO, 313 NFSERR_IO, 314 NFSERR_ACCES, 315 NFSERR_EXIST, 316 NFSERR_NOTDIR, 317 NFSERR_NOSPC, 318 NFSERR_ROFS, 319 NFSERR_NAMETOL, 320 NFSERR_DQUOT, 321 NFSERR_STALE, 322 NFSERR_BADHANDLE, 323 NFSERR_NOTSUPP, 324 NFSERR_SERVERFAULT, 325 0, 326}; 327 328static short nfsv3err_mkdir[] = { 329 NFSERR_IO, 330 NFSERR_IO, 331 NFSERR_ACCES, 332 NFSERR_EXIST, 333 NFSERR_NOTDIR, 334 NFSERR_NOSPC, 335 NFSERR_ROFS, 336 NFSERR_NAMETOL, 337 NFSERR_DQUOT, 338 NFSERR_STALE, 339 NFSERR_BADHANDLE, 340 NFSERR_NOTSUPP, 341 NFSERR_SERVERFAULT, 342 0, 343}; 344 345static short nfsv3err_symlink[] = { 346 NFSERR_IO, 347 NFSERR_IO, 348 NFSERR_ACCES, 349 NFSERR_EXIST, 350 NFSERR_NOTDIR, 351 NFSERR_NOSPC, 352 NFSERR_ROFS, 353 NFSERR_NAMETOL, 354 NFSERR_DQUOT, 355 NFSERR_STALE, 356 NFSERR_BADHANDLE, 357 NFSERR_NOTSUPP, 358 NFSERR_SERVERFAULT, 359 0, 360}; 361 362static short nfsv3err_mknod[] = { 363 NFSERR_IO, 364 NFSERR_IO, 365 NFSERR_ACCES, 366 NFSERR_EXIST, 367 NFSERR_NOTDIR, 368 NFSERR_NOSPC, 369 NFSERR_ROFS, 370 NFSERR_NAMETOL, 371 NFSERR_DQUOT, 372 NFSERR_STALE, 373 NFSERR_BADHANDLE, 374 NFSERR_NOTSUPP, 375 NFSERR_SERVERFAULT, 376 NFSERR_BADTYPE, 377 0, 378}; 379 380static short nfsv3err_remove[] = { 381 NFSERR_IO, 382 NFSERR_NOENT, 383 NFSERR_IO, 384 NFSERR_ACCES, 385 NFSERR_NOTDIR, 386 NFSERR_ROFS, 387 NFSERR_NAMETOL, 388 NFSERR_STALE, 389 NFSERR_BADHANDLE, 390 NFSERR_SERVERFAULT, 391 0, 392}; 393 394static short nfsv3err_rmdir[] = { 395 NFSERR_IO, 396 NFSERR_NOENT, 397 NFSERR_IO, 398 NFSERR_ACCES, 399 NFSERR_EXIST, 400 NFSERR_NOTDIR, 401 NFSERR_INVAL, 402 NFSERR_ROFS, 403 NFSERR_NAMETOL, 404 NFSERR_NOTEMPTY, 405 NFSERR_STALE, 406 NFSERR_BADHANDLE, 407 NFSERR_NOTSUPP, 408 NFSERR_SERVERFAULT, 409 0, 410}; 411 412static short nfsv3err_rename[] = { 413 NFSERR_IO, 414 NFSERR_NOENT, 415 NFSERR_IO, 416 NFSERR_ACCES, 417 NFSERR_EXIST, 418 NFSERR_XDEV, 419 NFSERR_NOTDIR, 420 NFSERR_ISDIR, 421 NFSERR_INVAL, 422 NFSERR_NOSPC, 423 NFSERR_ROFS, 424 NFSERR_MLINK, 425 NFSERR_NAMETOL, 426 NFSERR_NOTEMPTY, 427 NFSERR_DQUOT, 428 NFSERR_STALE, 429 NFSERR_BADHANDLE, 430 NFSERR_NOTSUPP, 431 NFSERR_SERVERFAULT, 432 0, 433}; 434 435static short nfsv3err_link[] = { 436 NFSERR_IO, 437 NFSERR_IO, 438 NFSERR_ACCES, 439 NFSERR_EXIST, 440 NFSERR_XDEV, 441 NFSERR_NOTDIR, 442 NFSERR_INVAL, 443 NFSERR_NOSPC, 444 NFSERR_ROFS, 445 NFSERR_MLINK, 446 NFSERR_NAMETOL, 447 NFSERR_DQUOT, 448 NFSERR_STALE, 449 NFSERR_BADHANDLE, 450 NFSERR_NOTSUPP, 451 NFSERR_SERVERFAULT, 452 0, 453}; 454 455static short nfsv3err_readdir[] = { 456 NFSERR_IO, 457 NFSERR_IO, 458 NFSERR_ACCES, 459 NFSERR_NOTDIR, 460 NFSERR_STALE, 461 NFSERR_BADHANDLE, 462 NFSERR_BAD_COOKIE, 463 NFSERR_TOOSMALL, 464 NFSERR_SERVERFAULT, 465 0, 466}; 467 468static short nfsv3err_readdirplus[] = { 469 NFSERR_IO, 470 NFSERR_IO, 471 NFSERR_ACCES, 472 NFSERR_NOTDIR, 473 NFSERR_STALE, 474 NFSERR_BADHANDLE, 475 NFSERR_BAD_COOKIE, 476 NFSERR_NOTSUPP, 477 NFSERR_TOOSMALL, 478 NFSERR_SERVERFAULT, 479 0, 480}; 481 482static short nfsv3err_fsstat[] = { 483 NFSERR_IO, 484 NFSERR_IO, 485 NFSERR_STALE, 486 NFSERR_BADHANDLE, 487 NFSERR_SERVERFAULT, 488 0, 489}; 490 491static short nfsv3err_fsinfo[] = { 492 NFSERR_STALE, 493 NFSERR_STALE, 494 NFSERR_BADHANDLE, 495 NFSERR_SERVERFAULT, 496 0, 497}; 498 499static short nfsv3err_pathconf[] = { 500 NFSERR_STALE, 501 NFSERR_STALE, 502 NFSERR_BADHANDLE, 503 NFSERR_SERVERFAULT, 504 0, 505}; 506 507static short nfsv3err_commit[] = { 508 NFSERR_IO, 509 NFSERR_IO, 510 NFSERR_STALE, 511 NFSERR_BADHANDLE, 512 NFSERR_SERVERFAULT, 513 0, 514}; 515 516static short *nfsrv_v3errmap[] = { 517 nfsv3err_null, 518 nfsv3err_getattr, 519 nfsv3err_setattr, 520 nfsv3err_lookup, 521 nfsv3err_access, 522 nfsv3err_readlink, 523 nfsv3err_read, 524 nfsv3err_write, 525 nfsv3err_create, 526 nfsv3err_mkdir, 527 nfsv3err_symlink, 528 nfsv3err_mknod, 529 nfsv3err_remove, 530 nfsv3err_rmdir, 531 nfsv3err_rename, 532 nfsv3err_link, 533 nfsv3err_readdir, 534 nfsv3err_readdirplus, 535 nfsv3err_fsstat, 536 nfsv3err_fsinfo, 537 nfsv3err_pathconf, 538 nfsv3err_commit, 539}; 540 541#endif /* NFS_NOSERVER */ 542 543extern struct nfsrtt nfsrtt; 544extern time_t nqnfsstarttime; 545extern int nqsrv_clockskew; 546extern int nqsrv_writeslack; 547extern int nqsrv_maxlease; 548extern struct nfsstats nfsstats; 549extern int nqnfs_piggy[NFS_NPROCS]; 550extern nfstype nfsv2_type[9]; 551extern nfstype nfsv3_type[9]; 552extern struct nfsnodehashhead *nfsnodehashtbl; 553extern u_long nfsnodehash; 554 555struct getfh_args; 556extern int getfh(struct proc *, struct getfh_args *, int *); 557struct nfssvc_args; 558extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 559 560LIST_HEAD(nfsnodehashhead, nfsnode); 561 562int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 563 564/* 565 * Create the header for an rpc request packet 566 * The hsiz is the size of the rest of the nfs request header. 567 * (just used to decide if a cluster is a good idea) 568 */ 569struct mbuf * 570nfsm_reqh(vp, procid, hsiz, bposp) 571 struct vnode *vp; 572 u_long procid; 573 int hsiz; 574 caddr_t *bposp; 575{ 576 register struct mbuf *mb; 577 register u_long *tl; 578 register caddr_t bpos; 579 struct mbuf *mb2; 580 struct nfsmount *nmp; 581 int nqflag; 582 583 MGET(mb, M_WAIT, MT_DATA); 584 if (hsiz >= MINCLSIZE) 585 MCLGET(mb, M_WAIT); 586 mb->m_len = 0; 587 bpos = mtod(mb, caddr_t); 588 589 /* 590 * For NQNFS, add lease request. 591 */ 592 if (vp) { 593 nmp = VFSTONFS(vp->v_mount); 594 if (nmp->nm_flag & NFSMNT_NQNFS) { 595 nqflag = NQNFS_NEEDLEASE(vp, procid); 596 if (nqflag) { 597 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 598 *tl++ = txdr_unsigned(nqflag); 599 *tl = txdr_unsigned(nmp->nm_leaseterm); 600 } else { 601 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 602 *tl = 0; 603 } 604 } 605 } 606 /* Finally, return values */ 607 *bposp = bpos; 608 return (mb); 609} 610 611/* 612 * Build the RPC header and fill in the authorization info. 613 * The authorization string argument is only used when the credentials 614 * come from outside of the kernel. 615 * Returns the head of the mbuf list. 616 */ 617struct mbuf * 618nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 619 verf_str, mrest, mrest_len, mbp, xidp) 620 register struct ucred *cr; 621 int nmflag; 622 int procid; 623 int auth_type; 624 int auth_len; 625 char *auth_str; 626 int verf_len; 627 char *verf_str; 628 struct mbuf *mrest; 629 int mrest_len; 630 struct mbuf **mbp; 631 u_long *xidp; 632{ 633 register struct mbuf *mb; 634 register u_long *tl; 635 register caddr_t bpos; 636 register int i; 637 struct mbuf *mreq, *mb2; 638 int siz, grpsiz, authsiz; 639 struct timeval tv; 640 static u_long base; 641 642 authsiz = nfsm_rndup(auth_len); 643 MGETHDR(mb, M_WAIT, MT_DATA); 644 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 645 MCLGET(mb, M_WAIT); 646 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 647 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 648 } else { 649 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 650 } 651 mb->m_len = 0; 652 mreq = mb; 653 bpos = mtod(mb, caddr_t); 654 655 /* 656 * First the RPC header. 657 */ 658 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 659 660 /* 661 * derive initial xid from system time 662 * XXX time is invalid if root not yet mounted 663 */ 664 if (!base && (rootvp)) { 665 microtime(&tv); 666 base = tv.tv_sec << 12; 667 nfs_xid = base; 668 } 669 /* 670 * Skip zero xid if it should ever happen. 671 */ 672 if (++nfs_xid == 0) 673 nfs_xid++; 674 675 *tl++ = *xidp = txdr_unsigned(nfs_xid); 676 *tl++ = rpc_call; 677 *tl++ = rpc_vers; 678 if (nmflag & NFSMNT_NQNFS) { 679 *tl++ = txdr_unsigned(NQNFS_PROG); 680 *tl++ = txdr_unsigned(NQNFS_VER3); 681 } else { 682 *tl++ = txdr_unsigned(NFS_PROG); 683 if (nmflag & NFSMNT_NFSV3) 684 *tl++ = txdr_unsigned(NFS_VER3); 685 else 686 *tl++ = txdr_unsigned(NFS_VER2); 687 } 688 if (nmflag & NFSMNT_NFSV3) 689 *tl++ = txdr_unsigned(procid); 690 else 691 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 692 693 /* 694 * And then the authorization cred. 695 */ 696 *tl++ = txdr_unsigned(auth_type); 697 *tl = txdr_unsigned(authsiz); 698 switch (auth_type) { 699 case RPCAUTH_UNIX: 700 nfsm_build(tl, u_long *, auth_len); 701 *tl++ = 0; /* stamp ?? */ 702 *tl++ = 0; /* NULL hostname */ 703 *tl++ = txdr_unsigned(cr->cr_uid); 704 *tl++ = txdr_unsigned(cr->cr_groups[0]); 705 grpsiz = (auth_len >> 2) - 5; 706 *tl++ = txdr_unsigned(grpsiz); 707 for (i = 1; i <= grpsiz; i++) 708 *tl++ = txdr_unsigned(cr->cr_groups[i]); 709 break; 710 case RPCAUTH_KERB4: 711 siz = auth_len; 712 while (siz > 0) { 713 if (M_TRAILINGSPACE(mb) == 0) { 714 MGET(mb2, M_WAIT, MT_DATA); 715 if (siz >= MINCLSIZE) 716 MCLGET(mb2, M_WAIT); 717 mb->m_next = mb2; 718 mb = mb2; 719 mb->m_len = 0; 720 bpos = mtod(mb, caddr_t); 721 } 722 i = min(siz, M_TRAILINGSPACE(mb)); 723 bcopy(auth_str, bpos, i); 724 mb->m_len += i; 725 auth_str += i; 726 bpos += i; 727 siz -= i; 728 } 729 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 730 for (i = 0; i < siz; i++) 731 *bpos++ = '\0'; 732 mb->m_len += siz; 733 } 734 break; 735 }; 736 737 /* 738 * And the verifier... 739 */ 740 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 741 if (verf_str) { 742 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 743 *tl = txdr_unsigned(verf_len); 744 siz = verf_len; 745 while (siz > 0) { 746 if (M_TRAILINGSPACE(mb) == 0) { 747 MGET(mb2, M_WAIT, MT_DATA); 748 if (siz >= MINCLSIZE) 749 MCLGET(mb2, M_WAIT); 750 mb->m_next = mb2; 751 mb = mb2; 752 mb->m_len = 0; 753 bpos = mtod(mb, caddr_t); 754 } 755 i = min(siz, M_TRAILINGSPACE(mb)); 756 bcopy(verf_str, bpos, i); 757 mb->m_len += i; 758 verf_str += i; 759 bpos += i; 760 siz -= i; 761 } 762 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 763 for (i = 0; i < siz; i++) 764 *bpos++ = '\0'; 765 mb->m_len += siz; 766 } 767 } else { 768 *tl++ = txdr_unsigned(RPCAUTH_NULL); 769 *tl = 0; 770 } 771 mb->m_next = mrest; 772 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 773 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 774 *mbp = mb; 775 return (mreq); 776} 777 778/* 779 * copies mbuf chain to the uio scatter/gather list 780 */ 781int 782nfsm_mbuftouio(mrep, uiop, siz, dpos) 783 struct mbuf **mrep; 784 register struct uio *uiop; 785 int siz; 786 caddr_t *dpos; 787{ 788 register char *mbufcp, *uiocp; 789 register int xfer, left, len; 790 register struct mbuf *mp; 791 long uiosiz, rem; 792 int error = 0; 793 794 mp = *mrep; 795 mbufcp = *dpos; 796 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 797 rem = nfsm_rndup(siz)-siz; 798 while (siz > 0) { 799 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 800 return (EFBIG); 801 left = uiop->uio_iov->iov_len; 802 uiocp = uiop->uio_iov->iov_base; 803 if (left > siz) 804 left = siz; 805 uiosiz = left; 806 while (left > 0) { 807 while (len == 0) { 808 mp = mp->m_next; 809 if (mp == NULL) 810 return (EBADRPC); 811 mbufcp = mtod(mp, caddr_t); 812 len = mp->m_len; 813 } 814 xfer = (left > len) ? len : left; 815#ifdef notdef 816 /* Not Yet.. */ 817 if (uiop->uio_iov->iov_op != NULL) 818 (*(uiop->uio_iov->iov_op)) 819 (mbufcp, uiocp, xfer); 820 else 821#endif 822 if (uiop->uio_segflg == UIO_SYSSPACE) 823 bcopy(mbufcp, uiocp, xfer); 824 else 825 copyout(mbufcp, uiocp, xfer); 826 left -= xfer; 827 len -= xfer; 828 mbufcp += xfer; 829 uiocp += xfer; 830 uiop->uio_offset += xfer; 831 uiop->uio_resid -= xfer; 832 } 833 if (uiop->uio_iov->iov_len <= siz) { 834 uiop->uio_iovcnt--; 835 uiop->uio_iov++; 836 } else { 837 uiop->uio_iov->iov_base += uiosiz; 838 uiop->uio_iov->iov_len -= uiosiz; 839 } 840 siz -= uiosiz; 841 } 842 *dpos = mbufcp; 843 *mrep = mp; 844 if (rem > 0) { 845 if (len < rem) 846 error = nfs_adv(mrep, dpos, rem, len); 847 else 848 *dpos += rem; 849 } 850 return (error); 851} 852 853/* 854 * copies a uio scatter/gather list to an mbuf chain. 855 * NOTE: can ony handle iovcnt == 1 856 */ 857int 858nfsm_uiotombuf(uiop, mq, siz, bpos) 859 register struct uio *uiop; 860 struct mbuf **mq; 861 int siz; 862 caddr_t *bpos; 863{ 864 register char *uiocp; 865 register struct mbuf *mp, *mp2; 866 register int xfer, left, mlen; 867 int uiosiz, clflg, rem; 868 char *cp; 869 870 if (uiop->uio_iovcnt != 1) 871 panic("nfsm_uiotombuf: iovcnt != 1"); 872 873 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 874 clflg = 1; 875 else 876 clflg = 0; 877 rem = nfsm_rndup(siz)-siz; 878 mp = mp2 = *mq; 879 while (siz > 0) { 880 left = uiop->uio_iov->iov_len; 881 uiocp = uiop->uio_iov->iov_base; 882 if (left > siz) 883 left = siz; 884 uiosiz = left; 885 while (left > 0) { 886 mlen = M_TRAILINGSPACE(mp); 887 if (mlen == 0) { 888 MGET(mp, M_WAIT, MT_DATA); 889 if (clflg) 890 MCLGET(mp, M_WAIT); 891 mp->m_len = 0; 892 mp2->m_next = mp; 893 mp2 = mp; 894 mlen = M_TRAILINGSPACE(mp); 895 } 896 xfer = (left > mlen) ? mlen : left; 897#ifdef notdef 898 /* Not Yet.. */ 899 if (uiop->uio_iov->iov_op != NULL) 900 (*(uiop->uio_iov->iov_op)) 901 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 902 else 903#endif 904 if (uiop->uio_segflg == UIO_SYSSPACE) 905 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 906 else 907 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 908 mp->m_len += xfer; 909 left -= xfer; 910 uiocp += xfer; 911 uiop->uio_offset += xfer; 912 uiop->uio_resid -= xfer; 913 } 914 uiop->uio_iov->iov_base += uiosiz; 915 uiop->uio_iov->iov_len -= uiosiz; 916 siz -= uiosiz; 917 } 918 if (rem > 0) { 919 if (rem > M_TRAILINGSPACE(mp)) { 920 MGET(mp, M_WAIT, MT_DATA); 921 mp->m_len = 0; 922 mp2->m_next = mp; 923 } 924 cp = mtod(mp, caddr_t)+mp->m_len; 925 for (left = 0; left < rem; left++) 926 *cp++ = '\0'; 927 mp->m_len += rem; 928 *bpos = cp; 929 } else 930 *bpos = mtod(mp, caddr_t)+mp->m_len; 931 *mq = mp; 932 return (0); 933} 934 935/* 936 * Help break down an mbuf chain by setting the first siz bytes contiguous 937 * pointed to by returned val. 938 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 939 * cases. (The macros use the vars. dpos and dpos2) 940 */ 941int 942nfsm_disct(mdp, dposp, siz, left, cp2) 943 struct mbuf **mdp; 944 caddr_t *dposp; 945 int siz; 946 int left; 947 caddr_t *cp2; 948{ 949 register struct mbuf *mp, *mp2; 950 register int siz2, xfer; 951 register caddr_t p; 952 953 mp = *mdp; 954 while (left == 0) { 955 *mdp = mp = mp->m_next; 956 if (mp == NULL) 957 return (EBADRPC); 958 left = mp->m_len; 959 *dposp = mtod(mp, caddr_t); 960 } 961 if (left >= siz) { 962 *cp2 = *dposp; 963 *dposp += siz; 964 } else if (mp->m_next == NULL) { 965 return (EBADRPC); 966 } else if (siz > MHLEN) { 967 panic("nfs S too big"); 968 } else { 969 MGET(mp2, M_WAIT, MT_DATA); 970 mp2->m_next = mp->m_next; 971 mp->m_next = mp2; 972 mp->m_len -= left; 973 mp = mp2; 974 *cp2 = p = mtod(mp, caddr_t); 975 bcopy(*dposp, p, left); /* Copy what was left */ 976 siz2 = siz-left; 977 p += left; 978 mp2 = mp->m_next; 979 /* Loop around copying up the siz2 bytes */ 980 while (siz2 > 0) { 981 if (mp2 == NULL) 982 return (EBADRPC); 983 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 984 if (xfer > 0) { 985 bcopy(mtod(mp2, caddr_t), p, xfer); 986 NFSMADV(mp2, xfer); 987 mp2->m_len -= xfer; 988 p += xfer; 989 siz2 -= xfer; 990 } 991 if (siz2 > 0) 992 mp2 = mp2->m_next; 993 } 994 mp->m_len = siz; 995 *mdp = mp2; 996 *dposp = mtod(mp2, caddr_t); 997 } 998 return (0); 999} 1000 1001/* 1002 * Advance the position in the mbuf chain. 1003 */ 1004int 1005nfs_adv(mdp, dposp, offs, left) 1006 struct mbuf **mdp; 1007 caddr_t *dposp; 1008 int offs; 1009 int left; 1010{ 1011 register struct mbuf *m; 1012 register int s; 1013 1014 m = *mdp; 1015 s = left; 1016 while (s < offs) { 1017 offs -= s; 1018 m = m->m_next; 1019 if (m == NULL) 1020 return (EBADRPC); 1021 s = m->m_len; 1022 } 1023 *mdp = m; 1024 *dposp = mtod(m, caddr_t)+offs; 1025 return (0); 1026} 1027 1028/* 1029 * Copy a string into mbufs for the hard cases... 1030 */ 1031int 1032nfsm_strtmbuf(mb, bpos, cp, siz) 1033 struct mbuf **mb; 1034 char **bpos; 1035 char *cp; 1036 long siz; 1037{ 1038 register struct mbuf *m1 = 0, *m2; 1039 long left, xfer, len, tlen; 1040 u_long *tl; 1041 int putsize; 1042 1043 putsize = 1; 1044 m2 = *mb; 1045 left = M_TRAILINGSPACE(m2); 1046 if (left > 0) { 1047 tl = ((u_long *)(*bpos)); 1048 *tl++ = txdr_unsigned(siz); 1049 putsize = 0; 1050 left -= NFSX_UNSIGNED; 1051 m2->m_len += NFSX_UNSIGNED; 1052 if (left > 0) { 1053 bcopy(cp, (caddr_t) tl, left); 1054 siz -= left; 1055 cp += left; 1056 m2->m_len += left; 1057 left = 0; 1058 } 1059 } 1060 /* Loop around adding mbufs */ 1061 while (siz > 0) { 1062 MGET(m1, M_WAIT, MT_DATA); 1063 if (siz > MLEN) 1064 MCLGET(m1, M_WAIT); 1065 m1->m_len = NFSMSIZ(m1); 1066 m2->m_next = m1; 1067 m2 = m1; 1068 tl = mtod(m1, u_long *); 1069 tlen = 0; 1070 if (putsize) { 1071 *tl++ = txdr_unsigned(siz); 1072 m1->m_len -= NFSX_UNSIGNED; 1073 tlen = NFSX_UNSIGNED; 1074 putsize = 0; 1075 } 1076 if (siz < m1->m_len) { 1077 len = nfsm_rndup(siz); 1078 xfer = siz; 1079 if (xfer < len) 1080 *(tl+(xfer>>2)) = 0; 1081 } else { 1082 xfer = len = m1->m_len; 1083 } 1084 bcopy(cp, (caddr_t) tl, xfer); 1085 m1->m_len = len+tlen; 1086 siz -= xfer; 1087 cp += xfer; 1088 } 1089 *mb = m1; 1090 *bpos = mtod(m1, caddr_t)+m1->m_len; 1091 return (0); 1092} 1093 1094/* 1095 * Called once to initialize data structures... 1096 */ 1097int 1098nfs_init(vfsp) 1099 struct vfsconf *vfsp; 1100{ 1101 register int i; 1102 1103 /* 1104 * Check to see if major data structures haven't bloated. 1105 */ 1106 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1107 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1108 printf("Try reducing NFS_SMALLFH\n"); 1109 } 1110 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1111 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1112 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1113 } 1114 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1115 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1116 printf("Try reducing NFS_UIDHASHSIZ\n"); 1117 } 1118 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1119 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1120 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1121 } 1122 nfs_mount_type = vfsp->vfc_typenum; 1123 nfsrtt.pos = 0; 1124 rpc_vers = txdr_unsigned(RPC_VER2); 1125 rpc_call = txdr_unsigned(RPC_CALL); 1126 rpc_reply = txdr_unsigned(RPC_REPLY); 1127 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1128 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1129 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1130 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1131 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1132 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1133 nfs_prog = txdr_unsigned(NFS_PROG); 1134 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1135 nfs_true = txdr_unsigned(TRUE); 1136 nfs_false = txdr_unsigned(FALSE); 1137 nfs_xdrneg1 = txdr_unsigned(-1); 1138 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1139 if (nfs_ticks < 1) 1140 nfs_ticks = 1; 1141 /* Ensure async daemons disabled */ 1142 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1143 nfs_iodwant[i] = (struct proc *)0; 1144 nfs_iodmount[i] = (struct nfsmount *)0; 1145 } 1146 nfs_nhinit(); /* Init the nfsnode table */ 1147#ifndef NFS_NOSERVER 1148 nfsrv_init(0); /* Init server data structures */ 1149 nfsrv_initcache(); /* Init the server request cache */ 1150#endif 1151 1152 /* 1153 * Initialize the nqnfs server stuff. 1154 */ 1155 if (nqnfsstarttime == 0) { 1156 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1157 + nqsrv_clockskew + nqsrv_writeslack; 1158 NQLOADNOVRAM(nqnfsstarttime); 1159 CIRCLEQ_INIT(&nqtimerhead); 1160 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1161 } 1162 1163 /* 1164 * Initialize reply list and start timer 1165 */ 1166 TAILQ_INIT(&nfs_reqq); 1167 1168 nfs_timer(0); 1169 1170 1171 /* 1172 * Set up lease_check and lease_updatetime so that other parts 1173 * of the system can call us, if we are loadable. 1174 */ 1175#ifndef NFS_NOSERVER 1176 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1177#endif 1178 lease_updatetime = nfs_lease_updatetime; 1179 vfsp->vfc_refcount++; /* make us non-unloadable */ 1180 sysent[SYS_nfssvc].sy_narg = 2; 1181 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1182#ifndef NFS_NOSERVER 1183 sysent[SYS_getfh].sy_narg = 2; 1184 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1185#endif 1186 1187 return (0); 1188} 1189 1190/* 1191 * Attribute cache routines. 1192 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1193 * that are on the mbuf list 1194 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1195 * error otherwise 1196 */ 1197 1198/* 1199 * Load the attribute cache (that lives in the nfsnode entry) with 1200 * the values on the mbuf list and 1201 * Iff vap not NULL 1202 * copy the attributes to *vaper 1203 */ 1204int 1205nfs_loadattrcache(vpp, mdp, dposp, vaper) 1206 struct vnode **vpp; 1207 struct mbuf **mdp; 1208 caddr_t *dposp; 1209 struct vattr *vaper; 1210{ 1211 register struct vnode *vp = *vpp; 1212 register struct vattr *vap; 1213 register struct nfs_fattr *fp; 1214 register struct nfsnode *np; 1215 register long t1; 1216 caddr_t cp2; 1217 int error = 0, rdev; 1218 struct mbuf *md; 1219 enum vtype vtyp; 1220 u_short vmode; 1221 struct timespec mtime; 1222 struct vnode *nvp; 1223 int v3 = NFS_ISV3(vp); 1224 1225 md = *mdp; 1226 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1227 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1228 return (error); 1229 fp = (struct nfs_fattr *)cp2; 1230 if (v3) { 1231 vtyp = nfsv3tov_type(fp->fa_type); 1232 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1233 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1234 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1235 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1236 } else { 1237 vtyp = nfsv2tov_type(fp->fa_type); 1238 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1239 /* 1240 * XXX 1241 * 1242 * The duplicate information returned in fa_type and fa_mode 1243 * is an ambiguity in the NFS version 2 protocol. 1244 * 1245 * VREG should be taken literally as a regular file. If a 1246 * server intents to return some type information differently 1247 * in the upper bits of the mode field (e.g. for sockets, or 1248 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1249 * leave the examination of the mode bits even in the VREG 1250 * case to avoid breakage for bogus servers, but we make sure 1251 * that there are actually type bits set in the upper part of 1252 * fa_mode (and failing that, trust the va_type field). 1253 * 1254 * NFSv3 cleared the issue, and requires fa_mode to not 1255 * contain any type information (while also introduing sockets 1256 * and FIFOs for fa_type). 1257 */ 1258 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1259 vtyp = IFTOVT(vmode); 1260 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1261 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1262 1263 /* 1264 * Really ugly NFSv2 kludge. 1265 */ 1266 if (vtyp == VCHR && rdev == 0xffffffff) 1267 vtyp = VFIFO; 1268 } 1269 1270 /* 1271 * If v_type == VNON it is a new node, so fill in the v_type, 1272 * n_mtime fields. Check to see if it represents a special 1273 * device, and if so, check for a possible alias. Once the 1274 * correct vnode has been obtained, fill in the rest of the 1275 * information. 1276 */ 1277 np = VTONFS(vp); 1278 if (vp->v_type != vtyp) { 1279 vp->v_type = vtyp; 1280 if (vp->v_type == VFIFO) { 1281 vp->v_op = fifo_nfsv2nodeop_p; 1282 } 1283 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1284 vp->v_op = spec_nfsv2nodeop_p; 1285 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1286 if (nvp) { 1287 /* 1288 * Discard unneeded vnode, but save its nfsnode. 1289 * Since the nfsnode does not have a lock, its 1290 * vnode lock has to be carried over. 1291 */ 1292 nvp->v_vnlock = vp->v_vnlock; 1293 vp->v_vnlock = NULL; 1294 nvp->v_data = vp->v_data; 1295 vp->v_data = NULL; 1296 vp->v_op = spec_vnodeop_p; 1297 vrele(vp); 1298 vgone(vp); 1299 /* 1300 * Reinitialize aliased node. 1301 */ 1302 np->n_vnode = nvp; 1303 *vpp = vp = nvp; 1304 } 1305 } 1306 np->n_mtime = mtime.tv_sec; 1307 } 1308 vap = &np->n_vattr; 1309 vap->va_type = vtyp; 1310 vap->va_mode = (vmode & 07777); 1311 vap->va_rdev = (dev_t)rdev; 1312 vap->va_mtime = mtime; 1313 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1314 if (v3) { 1315 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1316 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1317 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1318 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1319 vap->va_blocksize = NFS_FABLKSIZE; 1320 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1321 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1322 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1323 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1324 vap->va_flags = 0; 1325 vap->va_filerev = 0; 1326 } else { 1327 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1328 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1329 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1330 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1331 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1332 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1333 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1334 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1335 vap->va_flags = 0; 1336 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1337 vap->va_ctime.tv_nsec = 0; 1338 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1339 vap->va_filerev = 0; 1340 } 1341 if (vap->va_size != np->n_size) { 1342 if (vap->va_type == VREG) { 1343 if (np->n_flag & NMODIFIED) { 1344 if (vap->va_size < np->n_size) 1345 vap->va_size = np->n_size; 1346 else 1347 np->n_size = vap->va_size; 1348 } else 1349 np->n_size = vap->va_size; 1350 vnode_pager_setsize(vp, (u_long)np->n_size); 1351 } else 1352 np->n_size = vap->va_size; 1353 } 1354 np->n_attrstamp = time.tv_sec; 1355 if (vaper != NULL) { 1356 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1357 if (np->n_flag & NCHG) { 1358 if (np->n_flag & NACC) 1359 vaper->va_atime = np->n_atim; 1360 if (np->n_flag & NUPD) 1361 vaper->va_mtime = np->n_mtim; 1362 } 1363 } 1364 return (0); 1365} 1366 1367/* 1368 * Check the time stamp 1369 * If the cache is valid, copy contents to *vap and return 0 1370 * otherwise return an error 1371 */ 1372int 1373nfs_getattrcache(vp, vaper) 1374 register struct vnode *vp; 1375 struct vattr *vaper; 1376{ 1377 register struct nfsnode *np = VTONFS(vp); 1378 register struct vattr *vap; 1379 1380 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1381 nfsstats.attrcache_misses++; 1382 return (ENOENT); 1383 } 1384 nfsstats.attrcache_hits++; 1385 vap = &np->n_vattr; 1386 if (vap->va_size != np->n_size) { 1387 if (vap->va_type == VREG) { 1388 if (np->n_flag & NMODIFIED) { 1389 if (vap->va_size < np->n_size) 1390 vap->va_size = np->n_size; 1391 else 1392 np->n_size = vap->va_size; 1393 } else 1394 np->n_size = vap->va_size; 1395 vnode_pager_setsize(vp, (u_long)np->n_size); 1396 } else 1397 np->n_size = vap->va_size; 1398 } 1399 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1400 if (np->n_flag & NCHG) { 1401 if (np->n_flag & NACC) 1402 vaper->va_atime = np->n_atim; 1403 if (np->n_flag & NUPD) 1404 vaper->va_mtime = np->n_mtim; 1405 } 1406 return (0); 1407} 1408 1409#ifndef NFS_NOSERVER 1410/* 1411 * Set up nameidata for a lookup() call and do it. 1412 * 1413 * If pubflag is set, this call is done for a lookup operation on the 1414 * public filehandle. In that case we allow crossing mountpoints and 1415 * absolute pathnames. However, the caller is expected to check that 1416 * the lookup result is within the public fs, and deny access if 1417 * it is not. 1418 */ 1419int 1420nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1421 register struct nameidata *ndp; 1422 fhandle_t *fhp; 1423 int len; 1424 struct nfssvc_sock *slp; 1425 struct sockaddr *nam; 1426 struct mbuf **mdp; 1427 caddr_t *dposp; 1428 struct vnode **retdirp; 1429 struct proc *p; 1430 int kerbflag, pubflag; 1431{ 1432 register int i, rem; 1433 register struct mbuf *md; 1434 register char *fromcp, *tocp, *cp; 1435 struct iovec aiov; 1436 struct uio auio; 1437 struct vnode *dp; 1438 int error, rdonly, linklen; 1439 struct componentname *cnp = &ndp->ni_cnd; 1440 1441 *retdirp = (struct vnode *)0; 1442 cnp->cn_pnbuf = zalloc(namei_zone); 1443 1444 /* 1445 * Copy the name from the mbuf list to ndp->ni_pnbuf 1446 * and set the various ndp fields appropriately. 1447 */ 1448 fromcp = *dposp; 1449 tocp = cnp->cn_pnbuf; 1450 md = *mdp; 1451 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1452 cnp->cn_hash = 0; 1453 for (i = 0; i < len; i++) { 1454 while (rem == 0) { 1455 md = md->m_next; 1456 if (md == NULL) { 1457 error = EBADRPC; 1458 goto out; 1459 } 1460 fromcp = mtod(md, caddr_t); 1461 rem = md->m_len; 1462 } 1463 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1464 error = EACCES; 1465 goto out; 1466 } 1467 cnp->cn_hash += (unsigned char)*fromcp; 1468 *tocp++ = *fromcp++; 1469 rem--; 1470 } 1471 *tocp = '\0'; 1472 *mdp = md; 1473 *dposp = fromcp; 1474 len = nfsm_rndup(len)-len; 1475 if (len > 0) { 1476 if (rem >= len) 1477 *dposp += len; 1478 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1479 goto out; 1480 } 1481 1482 /* 1483 * Extract and set starting directory. 1484 */ 1485 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1486 nam, &rdonly, kerbflag, pubflag); 1487 if (error) 1488 goto out; 1489 if (dp->v_type != VDIR) { 1490 vrele(dp); 1491 error = ENOTDIR; 1492 goto out; 1493 } 1494 1495 if (rdonly) 1496 cnp->cn_flags |= RDONLY; 1497 1498 *retdirp = dp; 1499 1500 if (pubflag) { 1501 /* 1502 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1503 * and the 'native path' indicator. 1504 */ 1505 cp = zalloc(namei_zone); 1506 fromcp = cnp->cn_pnbuf; 1507 tocp = cp; 1508 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1509 switch ((unsigned char)*fromcp) { 1510 case WEBNFS_NATIVE_CHAR: 1511 /* 1512 * 'Native' path for us is the same 1513 * as a path according to the NFS spec, 1514 * just skip the escape char. 1515 */ 1516 fromcp++; 1517 break; 1518 /* 1519 * More may be added in the future, range 0x80-0xff 1520 */ 1521 default: 1522 error = EIO; 1523 zfree(namei_zone, cp); 1524 goto out; 1525 } 1526 } 1527 /* 1528 * Translate the '%' escapes, URL-style. 1529 */ 1530 while (*fromcp != '\0') { 1531 if (*fromcp == WEBNFS_ESC_CHAR) { 1532 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1533 fromcp++; 1534 *tocp++ = HEXSTRTOI(fromcp); 1535 fromcp += 2; 1536 continue; 1537 } else { 1538 error = ENOENT; 1539 zfree(namei_zone, cp); 1540 goto out; 1541 } 1542 } else 1543 *tocp++ = *fromcp++; 1544 } 1545 *tocp = '\0'; 1546 zfree(namei_zone, cnp->cn_pnbuf); 1547 cnp->cn_pnbuf = cp; 1548 } 1549 1550 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1551 ndp->ni_segflg = UIO_SYSSPACE; 1552 1553 if (pubflag) { 1554 ndp->ni_rootdir = rootvnode; 1555 ndp->ni_loopcnt = 0; 1556 if (cnp->cn_pnbuf[0] == '/') 1557 dp = rootvnode; 1558 } else { 1559 cnp->cn_flags |= NOCROSSMOUNT; 1560 } 1561 1562 cnp->cn_proc = p; 1563 VREF(dp); 1564 1565 for (;;) { 1566 cnp->cn_nameptr = cnp->cn_pnbuf; 1567 ndp->ni_startdir = dp; 1568 /* 1569 * And call lookup() to do the real work 1570 */ 1571 error = lookup(ndp); 1572 if (error) 1573 break; 1574 /* 1575 * Check for encountering a symbolic link 1576 */ 1577 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1578 nfsrv_object_create(ndp->ni_vp); 1579 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1580 cnp->cn_flags |= HASBUF; 1581 return (0); 1582 } 1583 break; 1584 } else { 1585 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1586 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1587 if (!pubflag) { 1588 vrele(ndp->ni_dvp); 1589 vput(ndp->ni_vp); 1590 ndp->ni_vp = NULL; 1591 error = EINVAL; 1592 break; 1593 } 1594 1595 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1596 error = ELOOP; 1597 break; 1598 } 1599 if (ndp->ni_pathlen > 1) 1600 cp = zalloc(namei_zone); 1601 else 1602 cp = cnp->cn_pnbuf; 1603 aiov.iov_base = cp; 1604 aiov.iov_len = MAXPATHLEN; 1605 auio.uio_iov = &aiov; 1606 auio.uio_iovcnt = 1; 1607 auio.uio_offset = 0; 1608 auio.uio_rw = UIO_READ; 1609 auio.uio_segflg = UIO_SYSSPACE; 1610 auio.uio_procp = (struct proc *)0; 1611 auio.uio_resid = MAXPATHLEN; 1612 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1613 if (error) { 1614 badlink: 1615 if (ndp->ni_pathlen > 1) 1616 zfree(namei_zone, cp); 1617 break; 1618 } 1619 linklen = MAXPATHLEN - auio.uio_resid; 1620 if (linklen == 0) { 1621 error = ENOENT; 1622 goto badlink; 1623 } 1624 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1625 error = ENAMETOOLONG; 1626 goto badlink; 1627 } 1628 if (ndp->ni_pathlen > 1) { 1629 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1630 zfree(namei_zone, cnp->cn_pnbuf); 1631 cnp->cn_pnbuf = cp; 1632 } else 1633 cnp->cn_pnbuf[linklen] = '\0'; 1634 ndp->ni_pathlen += linklen; 1635 vput(ndp->ni_vp); 1636 dp = ndp->ni_dvp; 1637 /* 1638 * Check if root directory should replace current directory. 1639 */ 1640 if (cnp->cn_pnbuf[0] == '/') { 1641 vrele(dp); 1642 dp = ndp->ni_rootdir; 1643 VREF(dp); 1644 } 1645 } 1646 } 1647out: 1648 zfree(namei_zone, cnp->cn_pnbuf); 1649 return (error); 1650} 1651 1652/* 1653 * A fiddled version of m_adj() that ensures null fill to a long 1654 * boundary and only trims off the back end 1655 */ 1656void 1657nfsm_adj(mp, len, nul) 1658 struct mbuf *mp; 1659 register int len; 1660 int nul; 1661{ 1662 register struct mbuf *m; 1663 register int count, i; 1664 register char *cp; 1665 1666 /* 1667 * Trim from tail. Scan the mbuf chain, 1668 * calculating its length and finding the last mbuf. 1669 * If the adjustment only affects this mbuf, then just 1670 * adjust and return. Otherwise, rescan and truncate 1671 * after the remaining size. 1672 */ 1673 count = 0; 1674 m = mp; 1675 for (;;) { 1676 count += m->m_len; 1677 if (m->m_next == (struct mbuf *)0) 1678 break; 1679 m = m->m_next; 1680 } 1681 if (m->m_len > len) { 1682 m->m_len -= len; 1683 if (nul > 0) { 1684 cp = mtod(m, caddr_t)+m->m_len-nul; 1685 for (i = 0; i < nul; i++) 1686 *cp++ = '\0'; 1687 } 1688 return; 1689 } 1690 count -= len; 1691 if (count < 0) 1692 count = 0; 1693 /* 1694 * Correct length for chain is "count". 1695 * Find the mbuf with last data, adjust its length, 1696 * and toss data from remaining mbufs on chain. 1697 */ 1698 for (m = mp; m; m = m->m_next) { 1699 if (m->m_len >= count) { 1700 m->m_len = count; 1701 if (nul > 0) { 1702 cp = mtod(m, caddr_t)+m->m_len-nul; 1703 for (i = 0; i < nul; i++) 1704 *cp++ = '\0'; 1705 } 1706 break; 1707 } 1708 count -= m->m_len; 1709 } 1710 for (m = m->m_next;m;m = m->m_next) 1711 m->m_len = 0; 1712} 1713 1714/* 1715 * Make these functions instead of macros, so that the kernel text size 1716 * doesn't get too big... 1717 */ 1718void 1719nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1720 struct nfsrv_descript *nfsd; 1721 int before_ret; 1722 register struct vattr *before_vap; 1723 int after_ret; 1724 struct vattr *after_vap; 1725 struct mbuf **mbp; 1726 char **bposp; 1727{ 1728 register struct mbuf *mb = *mbp, *mb2; 1729 register char *bpos = *bposp; 1730 register u_long *tl; 1731 1732 if (before_ret) { 1733 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1734 *tl = nfs_false; 1735 } else { 1736 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1737 *tl++ = nfs_true; 1738 txdr_hyper(&(before_vap->va_size), tl); 1739 tl += 2; 1740 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1741 tl += 2; 1742 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1743 } 1744 *bposp = bpos; 1745 *mbp = mb; 1746 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1747} 1748 1749void 1750nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1751 struct nfsrv_descript *nfsd; 1752 int after_ret; 1753 struct vattr *after_vap; 1754 struct mbuf **mbp; 1755 char **bposp; 1756{ 1757 register struct mbuf *mb = *mbp, *mb2; 1758 register char *bpos = *bposp; 1759 register u_long *tl; 1760 register struct nfs_fattr *fp; 1761 1762 if (after_ret) { 1763 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1764 *tl = nfs_false; 1765 } else { 1766 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1767 *tl++ = nfs_true; 1768 fp = (struct nfs_fattr *)tl; 1769 nfsm_srvfattr(nfsd, after_vap, fp); 1770 } 1771 *mbp = mb; 1772 *bposp = bpos; 1773} 1774 1775void 1776nfsm_srvfattr(nfsd, vap, fp) 1777 register struct nfsrv_descript *nfsd; 1778 register struct vattr *vap; 1779 register struct nfs_fattr *fp; 1780{ 1781 1782 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1783 fp->fa_uid = txdr_unsigned(vap->va_uid); 1784 fp->fa_gid = txdr_unsigned(vap->va_gid); 1785 if (nfsd->nd_flag & ND_NFSV3) { 1786 fp->fa_type = vtonfsv3_type(vap->va_type); 1787 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1788 txdr_hyper(&vap->va_size, &fp->fa3_size); 1789 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1790 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1791 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1792 fp->fa3_fsid.nfsuquad[0] = 0; 1793 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1794 fp->fa3_fileid.nfsuquad[0] = 0; 1795 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1796 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1797 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1798 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1799 } else { 1800 fp->fa_type = vtonfsv2_type(vap->va_type); 1801 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1802 fp->fa2_size = txdr_unsigned(vap->va_size); 1803 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1804 if (vap->va_type == VFIFO) 1805 fp->fa2_rdev = 0xffffffff; 1806 else 1807 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1808 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1809 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1810 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1811 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1812 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1813 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1814 } 1815} 1816 1817/* 1818 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1819 * - look up fsid in mount list (if not found ret error) 1820 * - get vp and export rights by calling VFS_FHTOVP() 1821 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1822 * - if not lockflag unlock it with VOP_UNLOCK() 1823 */ 1824int 1825nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1826 fhandle_t *fhp; 1827 int lockflag; 1828 struct vnode **vpp; 1829 struct ucred *cred; 1830 struct nfssvc_sock *slp; 1831 struct sockaddr *nam; 1832 int *rdonlyp; 1833 int kerbflag; 1834 int pubflag; 1835{ 1836 struct proc *p = curproc; /* XXX */ 1837 register struct mount *mp; 1838 register int i; 1839 struct ucred *credanon; 1840 int error, exflags; 1841 1842 *vpp = (struct vnode *)0; 1843 1844 if (nfs_ispublicfh(fhp)) { 1845 if (!pubflag || !nfs_pub.np_valid) 1846 return (ESTALE); 1847 fhp = &nfs_pub.np_handle; 1848 } 1849 1850 mp = vfs_getvfs(&fhp->fh_fsid); 1851 if (!mp) 1852 return (ESTALE); 1853 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1854 if (error) 1855 return (error); 1856 /* 1857 * Check/setup credentials. 1858 */ 1859 if (exflags & MNT_EXKERB) { 1860 if (!kerbflag) { 1861 vput(*vpp); 1862 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1863 } 1864 } else if (kerbflag) { 1865 vput(*vpp); 1866 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1867 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1868 cred->cr_uid = credanon->cr_uid; 1869 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1870 cred->cr_groups[i] = credanon->cr_groups[i]; 1871 cred->cr_ngroups = i; 1872 } 1873 if (exflags & MNT_EXRDONLY) 1874 *rdonlyp = 1; 1875 else 1876 *rdonlyp = 0; 1877 1878 nfsrv_object_create(*vpp); 1879 1880 if (!lockflag) 1881 VOP_UNLOCK(*vpp, 0, p); 1882 return (0); 1883} 1884 1885 1886/* 1887 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1888 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1889 * transformed this to all zeroes in both cases, so check for it. 1890 */ 1891int 1892nfs_ispublicfh(fhp) 1893 fhandle_t *fhp; 1894{ 1895 char *cp = (char *)fhp; 1896 int i; 1897 1898 for (i = 0; i < NFSX_V3FH; i++) 1899 if (*cp++ != 0) 1900 return (FALSE); 1901 return (TRUE); 1902} 1903 1904#endif /* NFS_NOSERVER */ 1905/* 1906 * This function compares two net addresses by family and returns TRUE 1907 * if they are the same host. 1908 * If there is any doubt, return FALSE. 1909 * The AF_INET family is handled as a special case so that address mbufs 1910 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1911 */ 1912int 1913netaddr_match(family, haddr, nam) 1914 int family; 1915 union nethostaddr *haddr; 1916 struct sockaddr *nam; 1917{ 1918 register struct sockaddr_in *inetaddr; 1919 1920 switch (family) { 1921 case AF_INET: 1922 inetaddr = (struct sockaddr_in *)nam; 1923 if (inetaddr->sin_family == AF_INET && 1924 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1925 return (1); 1926 break; 1927#ifdef ISO 1928 case AF_ISO: 1929 { 1930 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1931 1932 isoaddr1 = (struct sockaddr_iso *)nam; 1933 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1934 if (isoaddr1->siso_family == AF_ISO && 1935 isoaddr1->siso_nlen > 0 && 1936 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1937 SAME_ISOADDR(isoaddr1, isoaddr2)) 1938 return (1); 1939 break; 1940 } 1941#endif /* ISO */ 1942 default: 1943 break; 1944 }; 1945 return (0); 1946} 1947 1948static nfsuint64 nfs_nullcookie = { 0, 0 }; 1949/* 1950 * This function finds the directory cookie that corresponds to the 1951 * logical byte offset given. 1952 */ 1953nfsuint64 * 1954nfs_getcookie(np, off, add) 1955 register struct nfsnode *np; 1956 off_t off; 1957 int add; 1958{ 1959 register struct nfsdmap *dp, *dp2; 1960 register int pos; 1961 1962 pos = off / NFS_DIRBLKSIZ; 1963 if (pos == 0) { 1964#ifdef DIAGNOSTIC 1965 if (add) 1966 panic("nfs getcookie add at 0"); 1967#endif 1968 return (&nfs_nullcookie); 1969 } 1970 pos--; 1971 dp = np->n_cookies.lh_first; 1972 if (!dp) { 1973 if (add) { 1974 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1975 M_NFSDIROFF, M_WAITOK); 1976 dp->ndm_eocookie = 0; 1977 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1978 } else 1979 return ((nfsuint64 *)0); 1980 } 1981 while (pos >= NFSNUMCOOKIES) { 1982 pos -= NFSNUMCOOKIES; 1983 if (dp->ndm_list.le_next) { 1984 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1985 pos >= dp->ndm_eocookie) 1986 return ((nfsuint64 *)0); 1987 dp = dp->ndm_list.le_next; 1988 } else if (add) { 1989 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1990 M_NFSDIROFF, M_WAITOK); 1991 dp2->ndm_eocookie = 0; 1992 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1993 dp = dp2; 1994 } else 1995 return ((nfsuint64 *)0); 1996 } 1997 if (pos >= dp->ndm_eocookie) { 1998 if (add) 1999 dp->ndm_eocookie = pos + 1; 2000 else 2001 return ((nfsuint64 *)0); 2002 } 2003 return (&dp->ndm_cookies[pos]); 2004} 2005 2006/* 2007 * Invalidate cached directory information, except for the actual directory 2008 * blocks (which are invalidated separately). 2009 * Done mainly to avoid the use of stale offset cookies. 2010 */ 2011void 2012nfs_invaldir(vp) 2013 register struct vnode *vp; 2014{ 2015 register struct nfsnode *np = VTONFS(vp); 2016 2017#ifdef DIAGNOSTIC 2018 if (vp->v_type != VDIR) 2019 panic("nfs: invaldir not dir"); 2020#endif 2021 np->n_direofoffset = 0; 2022 np->n_cookieverf.nfsuquad[0] = 0; 2023 np->n_cookieverf.nfsuquad[1] = 0; 2024 if (np->n_cookies.lh_first) 2025 np->n_cookies.lh_first->ndm_eocookie = 0; 2026} 2027 2028/* 2029 * The write verifier has changed (probably due to a server reboot), so all 2030 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2031 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2032 * flag. Once done the new write verifier can be set for the mount point. 2033 */ 2034void 2035nfs_clearcommit(mp) 2036 struct mount *mp; 2037{ 2038 register struct vnode *vp, *nvp; 2039 register struct buf *bp, *nbp; 2040 int s; 2041 2042 s = splbio(); 2043loop: 2044 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2045 if (vp->v_mount != mp) /* Paranoia */ 2046 goto loop; 2047 nvp = vp->v_mntvnodes.le_next; 2048 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2049 nbp = bp->b_vnbufs.le_next; 2050 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2051 == (B_DELWRI | B_NEEDCOMMIT)) 2052 bp->b_flags &= ~B_NEEDCOMMIT; 2053 } 2054 } 2055 splx(s); 2056} 2057 2058#ifndef NFS_NOSERVER 2059/* 2060 * Map errnos to NFS error numbers. For Version 3 also filter out error 2061 * numbers not specified for the associated procedure. 2062 */ 2063int 2064nfsrv_errmap(nd, err) 2065 struct nfsrv_descript *nd; 2066 register int err; 2067{ 2068 register short *defaulterrp, *errp; 2069 2070 if (nd->nd_flag & ND_NFSV3) { 2071 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2072 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2073 while (*++errp) { 2074 if (*errp == err) 2075 return (err); 2076 else if (*errp > err) 2077 break; 2078 } 2079 return ((int)*defaulterrp); 2080 } else 2081 return (err & 0xffff); 2082 } 2083 if (err <= ELAST) 2084 return ((int)nfsrv_v2errmap[err - 1]); 2085 return (NFSERR_IO); 2086} 2087 2088int 2089nfsrv_object_create(vp) 2090 struct vnode *vp; 2091{ 2092 2093 if (vp == NULL || vp->v_type != VREG) 2094 return (1); 2095 return (vfs_object_create(vp, curproc, 2096 curproc ? curproc->p_ucred : NULL, 1)); 2097} 2098#endif /* NFS_NOSERVER */ 2099