nfs_common.c revision 32011
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 1.48 1997/12/20 00:25:01 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#include <sys/param.h> 46#include <sys/buf.h> 47#include <sys/proc.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/mount.h> 51#include <sys/vnode.h> 52#include <sys/namei.h> 53#include <sys/mbuf.h> 54#include <sys/socket.h> 55#include <sys/stat.h> 56#include <sys/malloc.h> 57#include <sys/sysent.h> 58#include <sys/syscall.h> 59 60#include <vm/vm.h> 61#include <vm/vm_object.h> 62#include <vm/vm_extern.h> 63#include <vm/vm_zone.h> 64 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <nfs/nfsnode.h> 69#include <nfs/xdr_subs.h> 70#include <nfs/nfsm_subs.h> 71#include <nfs/nfsmount.h> 72#include <nfs/nqnfs.h> 73#include <nfs/nfsrtt.h> 74 75#include <miscfs/specfs/specdev.h> 76 77#include <netinet/in.h> 78#ifdef ISO 79#include <netiso/iso.h> 80#endif 81 82/* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86u_long nfs_xdrneg1; 87u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92/* And other global data */ 93static u_long nfs_xid = 0; 94static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96}; 97enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99}; 100 101int nfs_mount_type; 102int nfs_ticks; 103 104struct nfs_reqq nfs_reqq; 105struct nfssvc_sockhead nfssvc_sockhead; 106int nfssvc_sockhead_flag; 107struct nfsd_head nfsd_head; 108int nfsd_head_flag; 109struct nfs_bufq nfs_bufq; 110struct nqtimerhead nqtimerhead; 111struct nqfhhashhead *nqfhhashtbl; 112u_long nqfhhash; 113 114#ifndef NFS_NOSERVER 115/* 116 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 117 */ 118int nfsv3_procid[NFS_NPROCS] = { 119 NFSPROC_NULL, 120 NFSPROC_GETATTR, 121 NFSPROC_SETATTR, 122 NFSPROC_NOOP, 123 NFSPROC_LOOKUP, 124 NFSPROC_READLINK, 125 NFSPROC_READ, 126 NFSPROC_NOOP, 127 NFSPROC_WRITE, 128 NFSPROC_CREATE, 129 NFSPROC_REMOVE, 130 NFSPROC_RENAME, 131 NFSPROC_LINK, 132 NFSPROC_SYMLINK, 133 NFSPROC_MKDIR, 134 NFSPROC_RMDIR, 135 NFSPROC_READDIR, 136 NFSPROC_FSSTAT, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP 145}; 146 147#endif /* NFS_NOSERVER */ 148/* 149 * and the reverse mapping from generic to Version 2 procedure numbers 150 */ 151int nfsv2_procid[NFS_NPROCS] = { 152 NFSV2PROC_NULL, 153 NFSV2PROC_GETATTR, 154 NFSV2PROC_SETATTR, 155 NFSV2PROC_LOOKUP, 156 NFSV2PROC_NOOP, 157 NFSV2PROC_READLINK, 158 NFSV2PROC_READ, 159 NFSV2PROC_WRITE, 160 NFSV2PROC_CREATE, 161 NFSV2PROC_MKDIR, 162 NFSV2PROC_SYMLINK, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_REMOVE, 165 NFSV2PROC_RMDIR, 166 NFSV2PROC_RENAME, 167 NFSV2PROC_LINK, 168 NFSV2PROC_READDIR, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_STATFS, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178}; 179 180#ifndef NFS_NOSERVER 181/* 182 * Maps errno values to nfs error numbers. 183 * Use NFSERR_IO as the catch all for ones not specifically defined in 184 * RFC 1094. 185 */ 186static u_char nfsrv_v2errmap[ELAST] = { 187 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 188 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 191 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 200 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, 204}; 205 206/* 207 * Maps errno values to nfs error numbers. 208 * Although it is not obvious whether or not NFS clients really care if 209 * a returned error value is in the specified list for the procedure, the 210 * safest thing to do is filter them appropriately. For Version 2, the 211 * X/Open XNFS document is the only specification that defines error values 212 * for each RPC (The RFC simply lists all possible error values for all RPCs), 213 * so I have decided to not do this for Version 2. 214 * The first entry is the default error return and the rest are the valid 215 * errors for that RPC in increasing numeric order. 216 */ 217static short nfsv3err_null[] = { 218 0, 219 0, 220}; 221 222static short nfsv3err_getattr[] = { 223 NFSERR_IO, 224 NFSERR_IO, 225 NFSERR_STALE, 226 NFSERR_BADHANDLE, 227 NFSERR_SERVERFAULT, 228 0, 229}; 230 231static short nfsv3err_setattr[] = { 232 NFSERR_IO, 233 NFSERR_PERM, 234 NFSERR_IO, 235 NFSERR_ACCES, 236 NFSERR_INVAL, 237 NFSERR_NOSPC, 238 NFSERR_ROFS, 239 NFSERR_DQUOT, 240 NFSERR_STALE, 241 NFSERR_BADHANDLE, 242 NFSERR_NOT_SYNC, 243 NFSERR_SERVERFAULT, 244 0, 245}; 246 247static short nfsv3err_lookup[] = { 248 NFSERR_IO, 249 NFSERR_NOENT, 250 NFSERR_IO, 251 NFSERR_ACCES, 252 NFSERR_NOTDIR, 253 NFSERR_NAMETOL, 254 NFSERR_STALE, 255 NFSERR_BADHANDLE, 256 NFSERR_SERVERFAULT, 257 0, 258}; 259 260static short nfsv3err_access[] = { 261 NFSERR_IO, 262 NFSERR_IO, 263 NFSERR_STALE, 264 NFSERR_BADHANDLE, 265 NFSERR_SERVERFAULT, 266 0, 267}; 268 269static short nfsv3err_readlink[] = { 270 NFSERR_IO, 271 NFSERR_IO, 272 NFSERR_ACCES, 273 NFSERR_INVAL, 274 NFSERR_STALE, 275 NFSERR_BADHANDLE, 276 NFSERR_NOTSUPP, 277 NFSERR_SERVERFAULT, 278 0, 279}; 280 281static short nfsv3err_read[] = { 282 NFSERR_IO, 283 NFSERR_IO, 284 NFSERR_NXIO, 285 NFSERR_ACCES, 286 NFSERR_INVAL, 287 NFSERR_STALE, 288 NFSERR_BADHANDLE, 289 NFSERR_SERVERFAULT, 290 0, 291}; 292 293static short nfsv3err_write[] = { 294 NFSERR_IO, 295 NFSERR_IO, 296 NFSERR_ACCES, 297 NFSERR_INVAL, 298 NFSERR_FBIG, 299 NFSERR_NOSPC, 300 NFSERR_ROFS, 301 NFSERR_DQUOT, 302 NFSERR_STALE, 303 NFSERR_BADHANDLE, 304 NFSERR_SERVERFAULT, 305 0, 306}; 307 308static short nfsv3err_create[] = { 309 NFSERR_IO, 310 NFSERR_IO, 311 NFSERR_ACCES, 312 NFSERR_EXIST, 313 NFSERR_NOTDIR, 314 NFSERR_NOSPC, 315 NFSERR_ROFS, 316 NFSERR_NAMETOL, 317 NFSERR_DQUOT, 318 NFSERR_STALE, 319 NFSERR_BADHANDLE, 320 NFSERR_NOTSUPP, 321 NFSERR_SERVERFAULT, 322 0, 323}; 324 325static short nfsv3err_mkdir[] = { 326 NFSERR_IO, 327 NFSERR_IO, 328 NFSERR_ACCES, 329 NFSERR_EXIST, 330 NFSERR_NOTDIR, 331 NFSERR_NOSPC, 332 NFSERR_ROFS, 333 NFSERR_NAMETOL, 334 NFSERR_DQUOT, 335 NFSERR_STALE, 336 NFSERR_BADHANDLE, 337 NFSERR_NOTSUPP, 338 NFSERR_SERVERFAULT, 339 0, 340}; 341 342static short nfsv3err_symlink[] = { 343 NFSERR_IO, 344 NFSERR_IO, 345 NFSERR_ACCES, 346 NFSERR_EXIST, 347 NFSERR_NOTDIR, 348 NFSERR_NOSPC, 349 NFSERR_ROFS, 350 NFSERR_NAMETOL, 351 NFSERR_DQUOT, 352 NFSERR_STALE, 353 NFSERR_BADHANDLE, 354 NFSERR_NOTSUPP, 355 NFSERR_SERVERFAULT, 356 0, 357}; 358 359static short nfsv3err_mknod[] = { 360 NFSERR_IO, 361 NFSERR_IO, 362 NFSERR_ACCES, 363 NFSERR_EXIST, 364 NFSERR_NOTDIR, 365 NFSERR_NOSPC, 366 NFSERR_ROFS, 367 NFSERR_NAMETOL, 368 NFSERR_DQUOT, 369 NFSERR_STALE, 370 NFSERR_BADHANDLE, 371 NFSERR_NOTSUPP, 372 NFSERR_SERVERFAULT, 373 NFSERR_BADTYPE, 374 0, 375}; 376 377static short nfsv3err_remove[] = { 378 NFSERR_IO, 379 NFSERR_NOENT, 380 NFSERR_IO, 381 NFSERR_ACCES, 382 NFSERR_NOTDIR, 383 NFSERR_ROFS, 384 NFSERR_NAMETOL, 385 NFSERR_STALE, 386 NFSERR_BADHANDLE, 387 NFSERR_SERVERFAULT, 388 0, 389}; 390 391static short nfsv3err_rmdir[] = { 392 NFSERR_IO, 393 NFSERR_NOENT, 394 NFSERR_IO, 395 NFSERR_ACCES, 396 NFSERR_EXIST, 397 NFSERR_NOTDIR, 398 NFSERR_INVAL, 399 NFSERR_ROFS, 400 NFSERR_NAMETOL, 401 NFSERR_NOTEMPTY, 402 NFSERR_STALE, 403 NFSERR_BADHANDLE, 404 NFSERR_NOTSUPP, 405 NFSERR_SERVERFAULT, 406 0, 407}; 408 409static short nfsv3err_rename[] = { 410 NFSERR_IO, 411 NFSERR_NOENT, 412 NFSERR_IO, 413 NFSERR_ACCES, 414 NFSERR_EXIST, 415 NFSERR_XDEV, 416 NFSERR_NOTDIR, 417 NFSERR_ISDIR, 418 NFSERR_INVAL, 419 NFSERR_NOSPC, 420 NFSERR_ROFS, 421 NFSERR_MLINK, 422 NFSERR_NAMETOL, 423 NFSERR_NOTEMPTY, 424 NFSERR_DQUOT, 425 NFSERR_STALE, 426 NFSERR_BADHANDLE, 427 NFSERR_NOTSUPP, 428 NFSERR_SERVERFAULT, 429 0, 430}; 431 432static short nfsv3err_link[] = { 433 NFSERR_IO, 434 NFSERR_IO, 435 NFSERR_ACCES, 436 NFSERR_EXIST, 437 NFSERR_XDEV, 438 NFSERR_NOTDIR, 439 NFSERR_INVAL, 440 NFSERR_NOSPC, 441 NFSERR_ROFS, 442 NFSERR_MLINK, 443 NFSERR_NAMETOL, 444 NFSERR_DQUOT, 445 NFSERR_STALE, 446 NFSERR_BADHANDLE, 447 NFSERR_NOTSUPP, 448 NFSERR_SERVERFAULT, 449 0, 450}; 451 452static short nfsv3err_readdir[] = { 453 NFSERR_IO, 454 NFSERR_IO, 455 NFSERR_ACCES, 456 NFSERR_NOTDIR, 457 NFSERR_STALE, 458 NFSERR_BADHANDLE, 459 NFSERR_BAD_COOKIE, 460 NFSERR_TOOSMALL, 461 NFSERR_SERVERFAULT, 462 0, 463}; 464 465static short nfsv3err_readdirplus[] = { 466 NFSERR_IO, 467 NFSERR_IO, 468 NFSERR_ACCES, 469 NFSERR_NOTDIR, 470 NFSERR_STALE, 471 NFSERR_BADHANDLE, 472 NFSERR_BAD_COOKIE, 473 NFSERR_NOTSUPP, 474 NFSERR_TOOSMALL, 475 NFSERR_SERVERFAULT, 476 0, 477}; 478 479static short nfsv3err_fsstat[] = { 480 NFSERR_IO, 481 NFSERR_IO, 482 NFSERR_STALE, 483 NFSERR_BADHANDLE, 484 NFSERR_SERVERFAULT, 485 0, 486}; 487 488static short nfsv3err_fsinfo[] = { 489 NFSERR_STALE, 490 NFSERR_STALE, 491 NFSERR_BADHANDLE, 492 NFSERR_SERVERFAULT, 493 0, 494}; 495 496static short nfsv3err_pathconf[] = { 497 NFSERR_STALE, 498 NFSERR_STALE, 499 NFSERR_BADHANDLE, 500 NFSERR_SERVERFAULT, 501 0, 502}; 503 504static short nfsv3err_commit[] = { 505 NFSERR_IO, 506 NFSERR_IO, 507 NFSERR_STALE, 508 NFSERR_BADHANDLE, 509 NFSERR_SERVERFAULT, 510 0, 511}; 512 513static short *nfsrv_v3errmap[] = { 514 nfsv3err_null, 515 nfsv3err_getattr, 516 nfsv3err_setattr, 517 nfsv3err_lookup, 518 nfsv3err_access, 519 nfsv3err_readlink, 520 nfsv3err_read, 521 nfsv3err_write, 522 nfsv3err_create, 523 nfsv3err_mkdir, 524 nfsv3err_symlink, 525 nfsv3err_mknod, 526 nfsv3err_remove, 527 nfsv3err_rmdir, 528 nfsv3err_rename, 529 nfsv3err_link, 530 nfsv3err_readdir, 531 nfsv3err_readdirplus, 532 nfsv3err_fsstat, 533 nfsv3err_fsinfo, 534 nfsv3err_pathconf, 535 nfsv3err_commit, 536}; 537 538#endif /* NFS_NOSERVER */ 539 540extern struct nfsrtt nfsrtt; 541extern time_t nqnfsstarttime; 542extern int nqsrv_clockskew; 543extern int nqsrv_writeslack; 544extern int nqsrv_maxlease; 545extern struct nfsstats nfsstats; 546extern int nqnfs_piggy[NFS_NPROCS]; 547extern nfstype nfsv2_type[9]; 548extern nfstype nfsv3_type[9]; 549extern struct nfsnodehashhead *nfsnodehashtbl; 550extern u_long nfsnodehash; 551 552struct getfh_args; 553extern int getfh(struct proc *, struct getfh_args *, int *); 554struct nfssvc_args; 555extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 556 557LIST_HEAD(nfsnodehashhead, nfsnode); 558 559int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 560 561/* 562 * Create the header for an rpc request packet 563 * The hsiz is the size of the rest of the nfs request header. 564 * (just used to decide if a cluster is a good idea) 565 */ 566struct mbuf * 567nfsm_reqh(vp, procid, hsiz, bposp) 568 struct vnode *vp; 569 u_long procid; 570 int hsiz; 571 caddr_t *bposp; 572{ 573 register struct mbuf *mb; 574 register u_long *tl; 575 register caddr_t bpos; 576 struct mbuf *mb2; 577 struct nfsmount *nmp; 578 int nqflag; 579 580 MGET(mb, M_WAIT, MT_DATA); 581 if (hsiz >= MINCLSIZE) 582 MCLGET(mb, M_WAIT); 583 mb->m_len = 0; 584 bpos = mtod(mb, caddr_t); 585 586 /* 587 * For NQNFS, add lease request. 588 */ 589 if (vp) { 590 nmp = VFSTONFS(vp->v_mount); 591 if (nmp->nm_flag & NFSMNT_NQNFS) { 592 nqflag = NQNFS_NEEDLEASE(vp, procid); 593 if (nqflag) { 594 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 595 *tl++ = txdr_unsigned(nqflag); 596 *tl = txdr_unsigned(nmp->nm_leaseterm); 597 } else { 598 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 599 *tl = 0; 600 } 601 } 602 } 603 /* Finally, return values */ 604 *bposp = bpos; 605 return (mb); 606} 607 608/* 609 * Build the RPC header and fill in the authorization info. 610 * The authorization string argument is only used when the credentials 611 * come from outside of the kernel. 612 * Returns the head of the mbuf list. 613 */ 614struct mbuf * 615nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 616 verf_str, mrest, mrest_len, mbp, xidp) 617 register struct ucred *cr; 618 int nmflag; 619 int procid; 620 int auth_type; 621 int auth_len; 622 char *auth_str; 623 int verf_len; 624 char *verf_str; 625 struct mbuf *mrest; 626 int mrest_len; 627 struct mbuf **mbp; 628 u_long *xidp; 629{ 630 register struct mbuf *mb; 631 register u_long *tl; 632 register caddr_t bpos; 633 register int i; 634 struct mbuf *mreq, *mb2; 635 int siz, grpsiz, authsiz; 636 struct timeval tv; 637 static u_long base; 638 639 authsiz = nfsm_rndup(auth_len); 640 MGETHDR(mb, M_WAIT, MT_DATA); 641 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 642 MCLGET(mb, M_WAIT); 643 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 644 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 645 } else { 646 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 647 } 648 mb->m_len = 0; 649 mreq = mb; 650 bpos = mtod(mb, caddr_t); 651 652 /* 653 * First the RPC header. 654 */ 655 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 656 657 /* 658 * derive initial xid from system time 659 * XXX time is invalid if root not yet mounted 660 */ 661 if (!base && (rootvp)) { 662 microtime(&tv); 663 base = tv.tv_sec << 12; 664 nfs_xid = base; 665 } 666 /* 667 * Skip zero xid if it should ever happen. 668 */ 669 if (++nfs_xid == 0) 670 nfs_xid++; 671 672 *tl++ = *xidp = txdr_unsigned(nfs_xid); 673 *tl++ = rpc_call; 674 *tl++ = rpc_vers; 675 if (nmflag & NFSMNT_NQNFS) { 676 *tl++ = txdr_unsigned(NQNFS_PROG); 677 *tl++ = txdr_unsigned(NQNFS_VER3); 678 } else { 679 *tl++ = txdr_unsigned(NFS_PROG); 680 if (nmflag & NFSMNT_NFSV3) 681 *tl++ = txdr_unsigned(NFS_VER3); 682 else 683 *tl++ = txdr_unsigned(NFS_VER2); 684 } 685 if (nmflag & NFSMNT_NFSV3) 686 *tl++ = txdr_unsigned(procid); 687 else 688 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 689 690 /* 691 * And then the authorization cred. 692 */ 693 *tl++ = txdr_unsigned(auth_type); 694 *tl = txdr_unsigned(authsiz); 695 switch (auth_type) { 696 case RPCAUTH_UNIX: 697 nfsm_build(tl, u_long *, auth_len); 698 *tl++ = 0; /* stamp ?? */ 699 *tl++ = 0; /* NULL hostname */ 700 *tl++ = txdr_unsigned(cr->cr_uid); 701 *tl++ = txdr_unsigned(cr->cr_groups[0]); 702 grpsiz = (auth_len >> 2) - 5; 703 *tl++ = txdr_unsigned(grpsiz); 704 for (i = 1; i <= grpsiz; i++) 705 *tl++ = txdr_unsigned(cr->cr_groups[i]); 706 break; 707 case RPCAUTH_KERB4: 708 siz = auth_len; 709 while (siz > 0) { 710 if (M_TRAILINGSPACE(mb) == 0) { 711 MGET(mb2, M_WAIT, MT_DATA); 712 if (siz >= MINCLSIZE) 713 MCLGET(mb2, M_WAIT); 714 mb->m_next = mb2; 715 mb = mb2; 716 mb->m_len = 0; 717 bpos = mtod(mb, caddr_t); 718 } 719 i = min(siz, M_TRAILINGSPACE(mb)); 720 bcopy(auth_str, bpos, i); 721 mb->m_len += i; 722 auth_str += i; 723 bpos += i; 724 siz -= i; 725 } 726 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 727 for (i = 0; i < siz; i++) 728 *bpos++ = '\0'; 729 mb->m_len += siz; 730 } 731 break; 732 }; 733 734 /* 735 * And the verifier... 736 */ 737 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 738 if (verf_str) { 739 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 740 *tl = txdr_unsigned(verf_len); 741 siz = verf_len; 742 while (siz > 0) { 743 if (M_TRAILINGSPACE(mb) == 0) { 744 MGET(mb2, M_WAIT, MT_DATA); 745 if (siz >= MINCLSIZE) 746 MCLGET(mb2, M_WAIT); 747 mb->m_next = mb2; 748 mb = mb2; 749 mb->m_len = 0; 750 bpos = mtod(mb, caddr_t); 751 } 752 i = min(siz, M_TRAILINGSPACE(mb)); 753 bcopy(verf_str, bpos, i); 754 mb->m_len += i; 755 verf_str += i; 756 bpos += i; 757 siz -= i; 758 } 759 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 760 for (i = 0; i < siz; i++) 761 *bpos++ = '\0'; 762 mb->m_len += siz; 763 } 764 } else { 765 *tl++ = txdr_unsigned(RPCAUTH_NULL); 766 *tl = 0; 767 } 768 mb->m_next = mrest; 769 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 770 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 771 *mbp = mb; 772 return (mreq); 773} 774 775/* 776 * copies mbuf chain to the uio scatter/gather list 777 */ 778int 779nfsm_mbuftouio(mrep, uiop, siz, dpos) 780 struct mbuf **mrep; 781 register struct uio *uiop; 782 int siz; 783 caddr_t *dpos; 784{ 785 register char *mbufcp, *uiocp; 786 register int xfer, left, len; 787 register struct mbuf *mp; 788 long uiosiz, rem; 789 int error = 0; 790 791 mp = *mrep; 792 mbufcp = *dpos; 793 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 794 rem = nfsm_rndup(siz)-siz; 795 while (siz > 0) { 796 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 797 return (EFBIG); 798 left = uiop->uio_iov->iov_len; 799 uiocp = uiop->uio_iov->iov_base; 800 if (left > siz) 801 left = siz; 802 uiosiz = left; 803 while (left > 0) { 804 while (len == 0) { 805 mp = mp->m_next; 806 if (mp == NULL) 807 return (EBADRPC); 808 mbufcp = mtod(mp, caddr_t); 809 len = mp->m_len; 810 } 811 xfer = (left > len) ? len : left; 812#ifdef notdef 813 /* Not Yet.. */ 814 if (uiop->uio_iov->iov_op != NULL) 815 (*(uiop->uio_iov->iov_op)) 816 (mbufcp, uiocp, xfer); 817 else 818#endif 819 if (uiop->uio_segflg == UIO_SYSSPACE) 820 bcopy(mbufcp, uiocp, xfer); 821 else 822 copyout(mbufcp, uiocp, xfer); 823 left -= xfer; 824 len -= xfer; 825 mbufcp += xfer; 826 uiocp += xfer; 827 uiop->uio_offset += xfer; 828 uiop->uio_resid -= xfer; 829 } 830 if (uiop->uio_iov->iov_len <= siz) { 831 uiop->uio_iovcnt--; 832 uiop->uio_iov++; 833 } else { 834 uiop->uio_iov->iov_base += uiosiz; 835 uiop->uio_iov->iov_len -= uiosiz; 836 } 837 siz -= uiosiz; 838 } 839 *dpos = mbufcp; 840 *mrep = mp; 841 if (rem > 0) { 842 if (len < rem) 843 error = nfs_adv(mrep, dpos, rem, len); 844 else 845 *dpos += rem; 846 } 847 return (error); 848} 849 850/* 851 * copies a uio scatter/gather list to an mbuf chain. 852 * NOTE: can ony handle iovcnt == 1 853 */ 854int 855nfsm_uiotombuf(uiop, mq, siz, bpos) 856 register struct uio *uiop; 857 struct mbuf **mq; 858 int siz; 859 caddr_t *bpos; 860{ 861 register char *uiocp; 862 register struct mbuf *mp, *mp2; 863 register int xfer, left, mlen; 864 int uiosiz, clflg, rem; 865 char *cp; 866 867 if (uiop->uio_iovcnt != 1) 868 panic("nfsm_uiotombuf: iovcnt != 1"); 869 870 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 871 clflg = 1; 872 else 873 clflg = 0; 874 rem = nfsm_rndup(siz)-siz; 875 mp = mp2 = *mq; 876 while (siz > 0) { 877 left = uiop->uio_iov->iov_len; 878 uiocp = uiop->uio_iov->iov_base; 879 if (left > siz) 880 left = siz; 881 uiosiz = left; 882 while (left > 0) { 883 mlen = M_TRAILINGSPACE(mp); 884 if (mlen == 0) { 885 MGET(mp, M_WAIT, MT_DATA); 886 if (clflg) 887 MCLGET(mp, M_WAIT); 888 mp->m_len = 0; 889 mp2->m_next = mp; 890 mp2 = mp; 891 mlen = M_TRAILINGSPACE(mp); 892 } 893 xfer = (left > mlen) ? mlen : left; 894#ifdef notdef 895 /* Not Yet.. */ 896 if (uiop->uio_iov->iov_op != NULL) 897 (*(uiop->uio_iov->iov_op)) 898 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 899 else 900#endif 901 if (uiop->uio_segflg == UIO_SYSSPACE) 902 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 903 else 904 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 905 mp->m_len += xfer; 906 left -= xfer; 907 uiocp += xfer; 908 uiop->uio_offset += xfer; 909 uiop->uio_resid -= xfer; 910 } 911 uiop->uio_iov->iov_base += uiosiz; 912 uiop->uio_iov->iov_len -= uiosiz; 913 siz -= uiosiz; 914 } 915 if (rem > 0) { 916 if (rem > M_TRAILINGSPACE(mp)) { 917 MGET(mp, M_WAIT, MT_DATA); 918 mp->m_len = 0; 919 mp2->m_next = mp; 920 } 921 cp = mtod(mp, caddr_t)+mp->m_len; 922 for (left = 0; left < rem; left++) 923 *cp++ = '\0'; 924 mp->m_len += rem; 925 *bpos = cp; 926 } else 927 *bpos = mtod(mp, caddr_t)+mp->m_len; 928 *mq = mp; 929 return (0); 930} 931 932/* 933 * Help break down an mbuf chain by setting the first siz bytes contiguous 934 * pointed to by returned val. 935 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 936 * cases. (The macros use the vars. dpos and dpos2) 937 */ 938int 939nfsm_disct(mdp, dposp, siz, left, cp2) 940 struct mbuf **mdp; 941 caddr_t *dposp; 942 int siz; 943 int left; 944 caddr_t *cp2; 945{ 946 register struct mbuf *mp, *mp2; 947 register int siz2, xfer; 948 register caddr_t p; 949 950 mp = *mdp; 951 while (left == 0) { 952 *mdp = mp = mp->m_next; 953 if (mp == NULL) 954 return (EBADRPC); 955 left = mp->m_len; 956 *dposp = mtod(mp, caddr_t); 957 } 958 if (left >= siz) { 959 *cp2 = *dposp; 960 *dposp += siz; 961 } else if (mp->m_next == NULL) { 962 return (EBADRPC); 963 } else if (siz > MHLEN) { 964 panic("nfs S too big"); 965 } else { 966 MGET(mp2, M_WAIT, MT_DATA); 967 mp2->m_next = mp->m_next; 968 mp->m_next = mp2; 969 mp->m_len -= left; 970 mp = mp2; 971 *cp2 = p = mtod(mp, caddr_t); 972 bcopy(*dposp, p, left); /* Copy what was left */ 973 siz2 = siz-left; 974 p += left; 975 mp2 = mp->m_next; 976 /* Loop around copying up the siz2 bytes */ 977 while (siz2 > 0) { 978 if (mp2 == NULL) 979 return (EBADRPC); 980 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 981 if (xfer > 0) { 982 bcopy(mtod(mp2, caddr_t), p, xfer); 983 NFSMADV(mp2, xfer); 984 mp2->m_len -= xfer; 985 p += xfer; 986 siz2 -= xfer; 987 } 988 if (siz2 > 0) 989 mp2 = mp2->m_next; 990 } 991 mp->m_len = siz; 992 *mdp = mp2; 993 *dposp = mtod(mp2, caddr_t); 994 } 995 return (0); 996} 997 998/* 999 * Advance the position in the mbuf chain. 1000 */ 1001int 1002nfs_adv(mdp, dposp, offs, left) 1003 struct mbuf **mdp; 1004 caddr_t *dposp; 1005 int offs; 1006 int left; 1007{ 1008 register struct mbuf *m; 1009 register int s; 1010 1011 m = *mdp; 1012 s = left; 1013 while (s < offs) { 1014 offs -= s; 1015 m = m->m_next; 1016 if (m == NULL) 1017 return (EBADRPC); 1018 s = m->m_len; 1019 } 1020 *mdp = m; 1021 *dposp = mtod(m, caddr_t)+offs; 1022 return (0); 1023} 1024 1025/* 1026 * Copy a string into mbufs for the hard cases... 1027 */ 1028int 1029nfsm_strtmbuf(mb, bpos, cp, siz) 1030 struct mbuf **mb; 1031 char **bpos; 1032 char *cp; 1033 long siz; 1034{ 1035 register struct mbuf *m1 = 0, *m2; 1036 long left, xfer, len, tlen; 1037 u_long *tl; 1038 int putsize; 1039 1040 putsize = 1; 1041 m2 = *mb; 1042 left = M_TRAILINGSPACE(m2); 1043 if (left > 0) { 1044 tl = ((u_long *)(*bpos)); 1045 *tl++ = txdr_unsigned(siz); 1046 putsize = 0; 1047 left -= NFSX_UNSIGNED; 1048 m2->m_len += NFSX_UNSIGNED; 1049 if (left > 0) { 1050 bcopy(cp, (caddr_t) tl, left); 1051 siz -= left; 1052 cp += left; 1053 m2->m_len += left; 1054 left = 0; 1055 } 1056 } 1057 /* Loop around adding mbufs */ 1058 while (siz > 0) { 1059 MGET(m1, M_WAIT, MT_DATA); 1060 if (siz > MLEN) 1061 MCLGET(m1, M_WAIT); 1062 m1->m_len = NFSMSIZ(m1); 1063 m2->m_next = m1; 1064 m2 = m1; 1065 tl = mtod(m1, u_long *); 1066 tlen = 0; 1067 if (putsize) { 1068 *tl++ = txdr_unsigned(siz); 1069 m1->m_len -= NFSX_UNSIGNED; 1070 tlen = NFSX_UNSIGNED; 1071 putsize = 0; 1072 } 1073 if (siz < m1->m_len) { 1074 len = nfsm_rndup(siz); 1075 xfer = siz; 1076 if (xfer < len) 1077 *(tl+(xfer>>2)) = 0; 1078 } else { 1079 xfer = len = m1->m_len; 1080 } 1081 bcopy(cp, (caddr_t) tl, xfer); 1082 m1->m_len = len+tlen; 1083 siz -= xfer; 1084 cp += xfer; 1085 } 1086 *mb = m1; 1087 *bpos = mtod(m1, caddr_t)+m1->m_len; 1088 return (0); 1089} 1090 1091/* 1092 * Called once to initialize data structures... 1093 */ 1094int 1095nfs_init(vfsp) 1096 struct vfsconf *vfsp; 1097{ 1098 register int i; 1099 1100 /* 1101 * Check to see if major data structures haven't bloated. 1102 */ 1103 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1104 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1105 printf("Try reducing NFS_SMALLFH\n"); 1106 } 1107 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1108 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1109 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1110 } 1111 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1112 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1113 printf("Try reducing NFS_UIDHASHSIZ\n"); 1114 } 1115 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1116 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1117 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1118 } 1119 nfs_mount_type = vfsp->vfc_typenum; 1120 nfsrtt.pos = 0; 1121 rpc_vers = txdr_unsigned(RPC_VER2); 1122 rpc_call = txdr_unsigned(RPC_CALL); 1123 rpc_reply = txdr_unsigned(RPC_REPLY); 1124 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1125 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1126 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1127 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1128 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1129 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1130 nfs_prog = txdr_unsigned(NFS_PROG); 1131 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1132 nfs_true = txdr_unsigned(TRUE); 1133 nfs_false = txdr_unsigned(FALSE); 1134 nfs_xdrneg1 = txdr_unsigned(-1); 1135 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1136 if (nfs_ticks < 1) 1137 nfs_ticks = 1; 1138 /* Ensure async daemons disabled */ 1139 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1140 nfs_iodwant[i] = (struct proc *)0; 1141 nfs_iodmount[i] = (struct nfsmount *)0; 1142 } 1143 nfs_nhinit(); /* Init the nfsnode table */ 1144#ifndef NFS_NOSERVER 1145 nfsrv_init(0); /* Init server data structures */ 1146 nfsrv_initcache(); /* Init the server request cache */ 1147#endif 1148 1149 /* 1150 * Initialize the nqnfs server stuff. 1151 */ 1152 if (nqnfsstarttime == 0) { 1153 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1154 + nqsrv_clockskew + nqsrv_writeslack; 1155 NQLOADNOVRAM(nqnfsstarttime); 1156 CIRCLEQ_INIT(&nqtimerhead); 1157 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1158 } 1159 1160 /* 1161 * Initialize reply list and start timer 1162 */ 1163 TAILQ_INIT(&nfs_reqq); 1164 1165 nfs_timer(0); 1166 1167 1168 /* 1169 * Set up lease_check and lease_updatetime so that other parts 1170 * of the system can call us, if we are loadable. 1171 */ 1172#ifndef NFS_NOSERVER 1173 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1174#endif 1175 lease_updatetime = nfs_lease_updatetime; 1176 vfsp->vfc_refcount++; /* make us non-unloadable */ 1177 sysent[SYS_nfssvc].sy_narg = 2; 1178 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1179#ifndef NFS_NOSERVER 1180 sysent[SYS_getfh].sy_narg = 2; 1181 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1182#endif 1183 1184 return (0); 1185} 1186 1187/* 1188 * Attribute cache routines. 1189 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1190 * that are on the mbuf list 1191 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1192 * error otherwise 1193 */ 1194 1195/* 1196 * Load the attribute cache (that lives in the nfsnode entry) with 1197 * the values on the mbuf list and 1198 * Iff vap not NULL 1199 * copy the attributes to *vaper 1200 */ 1201int 1202nfs_loadattrcache(vpp, mdp, dposp, vaper) 1203 struct vnode **vpp; 1204 struct mbuf **mdp; 1205 caddr_t *dposp; 1206 struct vattr *vaper; 1207{ 1208 register struct vnode *vp = *vpp; 1209 register struct vattr *vap; 1210 register struct nfs_fattr *fp; 1211 register struct nfsnode *np; 1212 register long t1; 1213 caddr_t cp2; 1214 int error = 0, rdev; 1215 struct mbuf *md; 1216 enum vtype vtyp; 1217 u_short vmode; 1218 struct timespec mtime; 1219 struct vnode *nvp; 1220 int v3 = NFS_ISV3(vp); 1221 1222 md = *mdp; 1223 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1224 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1225 return (error); 1226 fp = (struct nfs_fattr *)cp2; 1227 if (v3) { 1228 vtyp = nfsv3tov_type(fp->fa_type); 1229 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1230 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1231 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1232 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1233 } else { 1234 vtyp = nfsv2tov_type(fp->fa_type); 1235 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1236 /* 1237 * XXX 1238 * 1239 * The duplicate information returned in fa_type and fa_mode 1240 * is an ambiguity in the NFS version 2 protocol. 1241 * 1242 * VREG should be taken literally as a regular file. If a 1243 * server intents to return some type information differently 1244 * in the upper bits of the mode field (e.g. for sockets, or 1245 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1246 * leave the examination of the mode bits even in the VREG 1247 * case to avoid breakage for bogus servers, but we make sure 1248 * that there are actually type bits set in the upper part of 1249 * fa_mode (and failing that, trust the va_type field). 1250 * 1251 * NFSv3 cleared the issue, and requires fa_mode to not 1252 * contain any type information (while also introduing sockets 1253 * and FIFOs for fa_type). 1254 */ 1255 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1256 vtyp = IFTOVT(vmode); 1257 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1258 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1259 1260 /* 1261 * Really ugly NFSv2 kludge. 1262 */ 1263 if (vtyp == VCHR && rdev == 0xffffffff) 1264 vtyp = VFIFO; 1265 } 1266 1267 /* 1268 * If v_type == VNON it is a new node, so fill in the v_type, 1269 * n_mtime fields. Check to see if it represents a special 1270 * device, and if so, check for a possible alias. Once the 1271 * correct vnode has been obtained, fill in the rest of the 1272 * information. 1273 */ 1274 np = VTONFS(vp); 1275 if (vp->v_type != vtyp) { 1276 vp->v_type = vtyp; 1277 if (vp->v_type == VFIFO) { 1278 vp->v_op = fifo_nfsv2nodeop_p; 1279 } 1280 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1281 vp->v_op = spec_nfsv2nodeop_p; 1282 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1283 if (nvp) { 1284 /* 1285 * Discard unneeded vnode, but save its nfsnode. 1286 * Since the nfsnode does not have a lock, its 1287 * vnode lock has to be carried over. 1288 */ 1289 nvp->v_vnlock = vp->v_vnlock; 1290 vp->v_vnlock = NULL; 1291 nvp->v_data = vp->v_data; 1292 vp->v_data = NULL; 1293 vp->v_op = spec_vnodeop_p; 1294 vrele(vp); 1295 vgone(vp); 1296 /* 1297 * Reinitialize aliased node. 1298 */ 1299 np->n_vnode = nvp; 1300 *vpp = vp = nvp; 1301 } 1302 } 1303 np->n_mtime = mtime.tv_sec; 1304 } 1305 vap = &np->n_vattr; 1306 vap->va_type = vtyp; 1307 vap->va_mode = (vmode & 07777); 1308 vap->va_rdev = (dev_t)rdev; 1309 vap->va_mtime = mtime; 1310 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1311 if (v3) { 1312 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1313 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1314 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1315 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1316 vap->va_blocksize = NFS_FABLKSIZE; 1317 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1318 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1319 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1320 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1321 vap->va_flags = 0; 1322 vap->va_filerev = 0; 1323 } else { 1324 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1325 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1326 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1327 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1328 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1329 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1330 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1331 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1332 vap->va_flags = 0; 1333 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1334 vap->va_ctime.tv_nsec = 0; 1335 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1336 vap->va_filerev = 0; 1337 } 1338 if (vap->va_size != np->n_size) { 1339 if (vap->va_type == VREG) { 1340 if (np->n_flag & NMODIFIED) { 1341 if (vap->va_size < np->n_size) 1342 vap->va_size = np->n_size; 1343 else 1344 np->n_size = vap->va_size; 1345 } else 1346 np->n_size = vap->va_size; 1347 vnode_pager_setsize(vp, (u_long)np->n_size); 1348 } else 1349 np->n_size = vap->va_size; 1350 } 1351 np->n_attrstamp = time.tv_sec; 1352 if (vaper != NULL) { 1353 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1354 if (np->n_flag & NCHG) { 1355 if (np->n_flag & NACC) 1356 vaper->va_atime = np->n_atim; 1357 if (np->n_flag & NUPD) 1358 vaper->va_mtime = np->n_mtim; 1359 } 1360 } 1361 return (0); 1362} 1363 1364/* 1365 * Check the time stamp 1366 * If the cache is valid, copy contents to *vap and return 0 1367 * otherwise return an error 1368 */ 1369int 1370nfs_getattrcache(vp, vaper) 1371 register struct vnode *vp; 1372 struct vattr *vaper; 1373{ 1374 register struct nfsnode *np = VTONFS(vp); 1375 register struct vattr *vap; 1376 1377 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1378 nfsstats.attrcache_misses++; 1379 return (ENOENT); 1380 } 1381 nfsstats.attrcache_hits++; 1382 vap = &np->n_vattr; 1383 if (vap->va_size != np->n_size) { 1384 if (vap->va_type == VREG) { 1385 if (np->n_flag & NMODIFIED) { 1386 if (vap->va_size < np->n_size) 1387 vap->va_size = np->n_size; 1388 else 1389 np->n_size = vap->va_size; 1390 } else 1391 np->n_size = vap->va_size; 1392 vnode_pager_setsize(vp, (u_long)np->n_size); 1393 } else 1394 np->n_size = vap->va_size; 1395 } 1396 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1397 if (np->n_flag & NCHG) { 1398 if (np->n_flag & NACC) 1399 vaper->va_atime = np->n_atim; 1400 if (np->n_flag & NUPD) 1401 vaper->va_mtime = np->n_mtim; 1402 } 1403 return (0); 1404} 1405 1406#ifndef NFS_NOSERVER 1407/* 1408 * Set up nameidata for a lookup() call and do it. 1409 * 1410 * If pubflag is set, this call is done for a lookup operation on the 1411 * public filehandle. In that case we allow crossing mountpoints and 1412 * absolute pathnames. However, the caller is expected to check that 1413 * the lookup result is within the public fs, and deny access if 1414 * it is not. 1415 */ 1416int 1417nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1418 register struct nameidata *ndp; 1419 fhandle_t *fhp; 1420 int len; 1421 struct nfssvc_sock *slp; 1422 struct sockaddr *nam; 1423 struct mbuf **mdp; 1424 caddr_t *dposp; 1425 struct vnode **retdirp; 1426 struct proc *p; 1427 int kerbflag, pubflag; 1428{ 1429 register int i, rem; 1430 register struct mbuf *md; 1431 register char *fromcp, *tocp, *cp; 1432 struct iovec aiov; 1433 struct uio auio; 1434 struct vnode *dp; 1435 int error, rdonly, linklen; 1436 struct componentname *cnp = &ndp->ni_cnd; 1437 1438 *retdirp = (struct vnode *)0; 1439 cnp->cn_pnbuf = zalloc(namei_zone); 1440 1441 /* 1442 * Copy the name from the mbuf list to ndp->ni_pnbuf 1443 * and set the various ndp fields appropriately. 1444 */ 1445 fromcp = *dposp; 1446 tocp = cnp->cn_pnbuf; 1447 md = *mdp; 1448 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1449 cnp->cn_hash = 0; 1450 for (i = 0; i < len; i++) { 1451 while (rem == 0) { 1452 md = md->m_next; 1453 if (md == NULL) { 1454 error = EBADRPC; 1455 goto out; 1456 } 1457 fromcp = mtod(md, caddr_t); 1458 rem = md->m_len; 1459 } 1460 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1461 error = EACCES; 1462 goto out; 1463 } 1464 cnp->cn_hash += (unsigned char)*fromcp; 1465 *tocp++ = *fromcp++; 1466 rem--; 1467 } 1468 *tocp = '\0'; 1469 *mdp = md; 1470 *dposp = fromcp; 1471 len = nfsm_rndup(len)-len; 1472 if (len > 0) { 1473 if (rem >= len) 1474 *dposp += len; 1475 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1476 goto out; 1477 } 1478 1479 /* 1480 * Extract and set starting directory. 1481 */ 1482 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1483 nam, &rdonly, kerbflag, pubflag); 1484 if (error) 1485 goto out; 1486 if (dp->v_type != VDIR) { 1487 vrele(dp); 1488 error = ENOTDIR; 1489 goto out; 1490 } 1491 1492 if (rdonly) 1493 cnp->cn_flags |= RDONLY; 1494 1495 *retdirp = dp; 1496 1497 if (pubflag) { 1498 /* 1499 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1500 * and the 'native path' indicator. 1501 */ 1502 cp = zalloc(namei_zone); 1503 fromcp = cnp->cn_pnbuf; 1504 tocp = cp; 1505 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1506 switch ((unsigned char)*fromcp) { 1507 case WEBNFS_NATIVE_CHAR: 1508 /* 1509 * 'Native' path for us is the same 1510 * as a path according to the NFS spec, 1511 * just skip the escape char. 1512 */ 1513 fromcp++; 1514 break; 1515 /* 1516 * More may be added in the future, range 0x80-0xff 1517 */ 1518 default: 1519 error = EIO; 1520 zfree(namei_zone, cp); 1521 goto out; 1522 } 1523 } 1524 /* 1525 * Translate the '%' escapes, URL-style. 1526 */ 1527 while (*fromcp != '\0') { 1528 if (*fromcp == WEBNFS_ESC_CHAR) { 1529 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1530 fromcp++; 1531 *tocp++ = HEXSTRTOI(fromcp); 1532 fromcp += 2; 1533 continue; 1534 } else { 1535 error = ENOENT; 1536 zfree(namei_zone, cp); 1537 goto out; 1538 } 1539 } else 1540 *tocp++ = *fromcp++; 1541 } 1542 *tocp = '\0'; 1543 zfree(namei_zone, cnp->cn_pnbuf); 1544 cnp->cn_pnbuf = cp; 1545 } 1546 1547 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1548 ndp->ni_segflg = UIO_SYSSPACE; 1549 1550 if (pubflag) { 1551 ndp->ni_rootdir = rootvnode; 1552 ndp->ni_loopcnt = 0; 1553 if (cnp->cn_pnbuf[0] == '/') 1554 dp = rootvnode; 1555 } else { 1556 cnp->cn_flags |= NOCROSSMOUNT; 1557 } 1558 1559 cnp->cn_proc = p; 1560 VREF(dp); 1561 1562 for (;;) { 1563 cnp->cn_nameptr = cnp->cn_pnbuf; 1564 ndp->ni_startdir = dp; 1565 /* 1566 * And call lookup() to do the real work 1567 */ 1568 error = lookup(ndp); 1569 if (error) 1570 break; 1571 /* 1572 * Check for encountering a symbolic link 1573 */ 1574 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1575 nfsrv_object_create(ndp->ni_vp); 1576 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1577 cnp->cn_flags |= HASBUF; 1578 return (0); 1579 } 1580 break; 1581 } else { 1582 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1583 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1584 if (!pubflag) { 1585 vrele(ndp->ni_dvp); 1586 vput(ndp->ni_vp); 1587 ndp->ni_vp = NULL; 1588 error = EINVAL; 1589 break; 1590 } 1591 1592 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1593 error = ELOOP; 1594 break; 1595 } 1596 if (ndp->ni_pathlen > 1) 1597 cp = zalloc(namei_zone); 1598 else 1599 cp = cnp->cn_pnbuf; 1600 aiov.iov_base = cp; 1601 aiov.iov_len = MAXPATHLEN; 1602 auio.uio_iov = &aiov; 1603 auio.uio_iovcnt = 1; 1604 auio.uio_offset = 0; 1605 auio.uio_rw = UIO_READ; 1606 auio.uio_segflg = UIO_SYSSPACE; 1607 auio.uio_procp = (struct proc *)0; 1608 auio.uio_resid = MAXPATHLEN; 1609 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1610 if (error) { 1611 badlink: 1612 if (ndp->ni_pathlen > 1) 1613 zfree(namei_zone, cp); 1614 break; 1615 } 1616 linklen = MAXPATHLEN - auio.uio_resid; 1617 if (linklen == 0) { 1618 error = ENOENT; 1619 goto badlink; 1620 } 1621 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1622 error = ENAMETOOLONG; 1623 goto badlink; 1624 } 1625 if (ndp->ni_pathlen > 1) { 1626 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1627 zfree(namei_zone, cnp->cn_pnbuf); 1628 cnp->cn_pnbuf = cp; 1629 } else 1630 cnp->cn_pnbuf[linklen] = '\0'; 1631 ndp->ni_pathlen += linklen; 1632 vput(ndp->ni_vp); 1633 dp = ndp->ni_dvp; 1634 /* 1635 * Check if root directory should replace current directory. 1636 */ 1637 if (cnp->cn_pnbuf[0] == '/') { 1638 vrele(dp); 1639 dp = ndp->ni_rootdir; 1640 VREF(dp); 1641 } 1642 } 1643 } 1644out: 1645 zfree(namei_zone, cnp->cn_pnbuf); 1646 return (error); 1647} 1648 1649/* 1650 * A fiddled version of m_adj() that ensures null fill to a long 1651 * boundary and only trims off the back end 1652 */ 1653void 1654nfsm_adj(mp, len, nul) 1655 struct mbuf *mp; 1656 register int len; 1657 int nul; 1658{ 1659 register struct mbuf *m; 1660 register int count, i; 1661 register char *cp; 1662 1663 /* 1664 * Trim from tail. Scan the mbuf chain, 1665 * calculating its length and finding the last mbuf. 1666 * If the adjustment only affects this mbuf, then just 1667 * adjust and return. Otherwise, rescan and truncate 1668 * after the remaining size. 1669 */ 1670 count = 0; 1671 m = mp; 1672 for (;;) { 1673 count += m->m_len; 1674 if (m->m_next == (struct mbuf *)0) 1675 break; 1676 m = m->m_next; 1677 } 1678 if (m->m_len > len) { 1679 m->m_len -= len; 1680 if (nul > 0) { 1681 cp = mtod(m, caddr_t)+m->m_len-nul; 1682 for (i = 0; i < nul; i++) 1683 *cp++ = '\0'; 1684 } 1685 return; 1686 } 1687 count -= len; 1688 if (count < 0) 1689 count = 0; 1690 /* 1691 * Correct length for chain is "count". 1692 * Find the mbuf with last data, adjust its length, 1693 * and toss data from remaining mbufs on chain. 1694 */ 1695 for (m = mp; m; m = m->m_next) { 1696 if (m->m_len >= count) { 1697 m->m_len = count; 1698 if (nul > 0) { 1699 cp = mtod(m, caddr_t)+m->m_len-nul; 1700 for (i = 0; i < nul; i++) 1701 *cp++ = '\0'; 1702 } 1703 break; 1704 } 1705 count -= m->m_len; 1706 } 1707 for (m = m->m_next;m;m = m->m_next) 1708 m->m_len = 0; 1709} 1710 1711/* 1712 * Make these functions instead of macros, so that the kernel text size 1713 * doesn't get too big... 1714 */ 1715void 1716nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1717 struct nfsrv_descript *nfsd; 1718 int before_ret; 1719 register struct vattr *before_vap; 1720 int after_ret; 1721 struct vattr *after_vap; 1722 struct mbuf **mbp; 1723 char **bposp; 1724{ 1725 register struct mbuf *mb = *mbp, *mb2; 1726 register char *bpos = *bposp; 1727 register u_long *tl; 1728 1729 if (before_ret) { 1730 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1731 *tl = nfs_false; 1732 } else { 1733 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1734 *tl++ = nfs_true; 1735 txdr_hyper(&(before_vap->va_size), tl); 1736 tl += 2; 1737 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1738 tl += 2; 1739 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1740 } 1741 *bposp = bpos; 1742 *mbp = mb; 1743 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1744} 1745 1746void 1747nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1748 struct nfsrv_descript *nfsd; 1749 int after_ret; 1750 struct vattr *after_vap; 1751 struct mbuf **mbp; 1752 char **bposp; 1753{ 1754 register struct mbuf *mb = *mbp, *mb2; 1755 register char *bpos = *bposp; 1756 register u_long *tl; 1757 register struct nfs_fattr *fp; 1758 1759 if (after_ret) { 1760 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1761 *tl = nfs_false; 1762 } else { 1763 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1764 *tl++ = nfs_true; 1765 fp = (struct nfs_fattr *)tl; 1766 nfsm_srvfattr(nfsd, after_vap, fp); 1767 } 1768 *mbp = mb; 1769 *bposp = bpos; 1770} 1771 1772void 1773nfsm_srvfattr(nfsd, vap, fp) 1774 register struct nfsrv_descript *nfsd; 1775 register struct vattr *vap; 1776 register struct nfs_fattr *fp; 1777{ 1778 1779 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1780 fp->fa_uid = txdr_unsigned(vap->va_uid); 1781 fp->fa_gid = txdr_unsigned(vap->va_gid); 1782 if (nfsd->nd_flag & ND_NFSV3) { 1783 fp->fa_type = vtonfsv3_type(vap->va_type); 1784 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1785 txdr_hyper(&vap->va_size, &fp->fa3_size); 1786 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1787 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1788 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1789 fp->fa3_fsid.nfsuquad[0] = 0; 1790 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1791 fp->fa3_fileid.nfsuquad[0] = 0; 1792 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1793 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1794 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1795 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1796 } else { 1797 fp->fa_type = vtonfsv2_type(vap->va_type); 1798 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1799 fp->fa2_size = txdr_unsigned(vap->va_size); 1800 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1801 if (vap->va_type == VFIFO) 1802 fp->fa2_rdev = 0xffffffff; 1803 else 1804 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1805 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1806 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1807 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1808 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1809 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1810 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1811 } 1812} 1813 1814/* 1815 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1816 * - look up fsid in mount list (if not found ret error) 1817 * - get vp and export rights by calling VFS_FHTOVP() 1818 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1819 * - if not lockflag unlock it with VOP_UNLOCK() 1820 */ 1821int 1822nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1823 fhandle_t *fhp; 1824 int lockflag; 1825 struct vnode **vpp; 1826 struct ucred *cred; 1827 struct nfssvc_sock *slp; 1828 struct sockaddr *nam; 1829 int *rdonlyp; 1830 int kerbflag; 1831 int pubflag; 1832{ 1833 struct proc *p = curproc; /* XXX */ 1834 register struct mount *mp; 1835 register int i; 1836 struct ucred *credanon; 1837 int error, exflags; 1838 1839 *vpp = (struct vnode *)0; 1840 1841 if (nfs_ispublicfh(fhp)) { 1842 if (!pubflag || !nfs_pub.np_valid) 1843 return (ESTALE); 1844 fhp = &nfs_pub.np_handle; 1845 } 1846 1847 mp = vfs_getvfs(&fhp->fh_fsid); 1848 if (!mp) 1849 return (ESTALE); 1850 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1851 if (error) 1852 return (error); 1853 /* 1854 * Check/setup credentials. 1855 */ 1856 if (exflags & MNT_EXKERB) { 1857 if (!kerbflag) { 1858 vput(*vpp); 1859 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1860 } 1861 } else if (kerbflag) { 1862 vput(*vpp); 1863 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1864 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1865 cred->cr_uid = credanon->cr_uid; 1866 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1867 cred->cr_groups[i] = credanon->cr_groups[i]; 1868 cred->cr_ngroups = i; 1869 } 1870 if (exflags & MNT_EXRDONLY) 1871 *rdonlyp = 1; 1872 else 1873 *rdonlyp = 0; 1874 1875 nfsrv_object_create(*vpp); 1876 1877 if (!lockflag) 1878 VOP_UNLOCK(*vpp, 0, p); 1879 return (0); 1880} 1881 1882 1883/* 1884 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1885 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1886 * transformed this to all zeroes in both cases, so check for it. 1887 */ 1888int 1889nfs_ispublicfh(fhp) 1890 fhandle_t *fhp; 1891{ 1892 char *cp = (char *)fhp; 1893 int i; 1894 1895 for (i = 0; i < NFSX_V3FH; i++) 1896 if (*cp++ != 0) 1897 return (FALSE); 1898 return (TRUE); 1899} 1900 1901#endif /* NFS_NOSERVER */ 1902/* 1903 * This function compares two net addresses by family and returns TRUE 1904 * if they are the same host. 1905 * If there is any doubt, return FALSE. 1906 * The AF_INET family is handled as a special case so that address mbufs 1907 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1908 */ 1909int 1910netaddr_match(family, haddr, nam) 1911 int family; 1912 union nethostaddr *haddr; 1913 struct sockaddr *nam; 1914{ 1915 register struct sockaddr_in *inetaddr; 1916 1917 switch (family) { 1918 case AF_INET: 1919 inetaddr = (struct sockaddr_in *)nam; 1920 if (inetaddr->sin_family == AF_INET && 1921 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1922 return (1); 1923 break; 1924#ifdef ISO 1925 case AF_ISO: 1926 { 1927 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1928 1929 isoaddr1 = (struct sockaddr_iso *)nam; 1930 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1931 if (isoaddr1->siso_family == AF_ISO && 1932 isoaddr1->siso_nlen > 0 && 1933 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1934 SAME_ISOADDR(isoaddr1, isoaddr2)) 1935 return (1); 1936 break; 1937 } 1938#endif /* ISO */ 1939 default: 1940 break; 1941 }; 1942 return (0); 1943} 1944 1945static nfsuint64 nfs_nullcookie = { 0, 0 }; 1946/* 1947 * This function finds the directory cookie that corresponds to the 1948 * logical byte offset given. 1949 */ 1950nfsuint64 * 1951nfs_getcookie(np, off, add) 1952 register struct nfsnode *np; 1953 off_t off; 1954 int add; 1955{ 1956 register struct nfsdmap *dp, *dp2; 1957 register int pos; 1958 1959 pos = off / NFS_DIRBLKSIZ; 1960 if (pos == 0) { 1961#ifdef DIAGNOSTIC 1962 if (add) 1963 panic("nfs getcookie add at 0"); 1964#endif 1965 return (&nfs_nullcookie); 1966 } 1967 pos--; 1968 dp = np->n_cookies.lh_first; 1969 if (!dp) { 1970 if (add) { 1971 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1972 M_NFSDIROFF, M_WAITOK); 1973 dp->ndm_eocookie = 0; 1974 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1975 } else 1976 return ((nfsuint64 *)0); 1977 } 1978 while (pos >= NFSNUMCOOKIES) { 1979 pos -= NFSNUMCOOKIES; 1980 if (dp->ndm_list.le_next) { 1981 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1982 pos >= dp->ndm_eocookie) 1983 return ((nfsuint64 *)0); 1984 dp = dp->ndm_list.le_next; 1985 } else if (add) { 1986 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1987 M_NFSDIROFF, M_WAITOK); 1988 dp2->ndm_eocookie = 0; 1989 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1990 dp = dp2; 1991 } else 1992 return ((nfsuint64 *)0); 1993 } 1994 if (pos >= dp->ndm_eocookie) { 1995 if (add) 1996 dp->ndm_eocookie = pos + 1; 1997 else 1998 return ((nfsuint64 *)0); 1999 } 2000 return (&dp->ndm_cookies[pos]); 2001} 2002 2003/* 2004 * Invalidate cached directory information, except for the actual directory 2005 * blocks (which are invalidated separately). 2006 * Done mainly to avoid the use of stale offset cookies. 2007 */ 2008void 2009nfs_invaldir(vp) 2010 register struct vnode *vp; 2011{ 2012 register struct nfsnode *np = VTONFS(vp); 2013 2014#ifdef DIAGNOSTIC 2015 if (vp->v_type != VDIR) 2016 panic("nfs: invaldir not dir"); 2017#endif 2018 np->n_direofoffset = 0; 2019 np->n_cookieverf.nfsuquad[0] = 0; 2020 np->n_cookieverf.nfsuquad[1] = 0; 2021 if (np->n_cookies.lh_first) 2022 np->n_cookies.lh_first->ndm_eocookie = 0; 2023} 2024 2025/* 2026 * The write verifier has changed (probably due to a server reboot), so all 2027 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2028 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2029 * flag. Once done the new write verifier can be set for the mount point. 2030 */ 2031void 2032nfs_clearcommit(mp) 2033 struct mount *mp; 2034{ 2035 register struct vnode *vp, *nvp; 2036 register struct buf *bp, *nbp; 2037 int s; 2038 2039 s = splbio(); 2040loop: 2041 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2042 if (vp->v_mount != mp) /* Paranoia */ 2043 goto loop; 2044 nvp = vp->v_mntvnodes.le_next; 2045 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2046 nbp = bp->b_vnbufs.le_next; 2047 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2048 == (B_DELWRI | B_NEEDCOMMIT)) 2049 bp->b_flags &= ~B_NEEDCOMMIT; 2050 } 2051 } 2052 splx(s); 2053} 2054 2055#ifndef NFS_NOSERVER 2056/* 2057 * Map errnos to NFS error numbers. For Version 3 also filter out error 2058 * numbers not specified for the associated procedure. 2059 */ 2060int 2061nfsrv_errmap(nd, err) 2062 struct nfsrv_descript *nd; 2063 register int err; 2064{ 2065 register short *defaulterrp, *errp; 2066 2067 if (nd->nd_flag & ND_NFSV3) { 2068 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2069 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2070 while (*++errp) { 2071 if (*errp == err) 2072 return (err); 2073 else if (*errp > err) 2074 break; 2075 } 2076 return ((int)*defaulterrp); 2077 } else 2078 return (err & 0xffff); 2079 } 2080 if (err <= ELAST) 2081 return ((int)nfsrv_v2errmap[err - 1]); 2082 return (NFSERR_IO); 2083} 2084 2085int 2086nfsrv_object_create(vp) 2087 struct vnode *vp; 2088{ 2089 2090 if (vp == NULL || vp->v_type != VREG) 2091 return (1); 2092 return (vfs_object_create(vp, curproc, 2093 curproc ? curproc->p_ucred : NULL, 1)); 2094} 2095#endif /* NFS_NOSERVER */ 2096