nfs_srvsubs.c revision 34961
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 1.51 1998/02/06 12:13:57 eivind 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 561u_quad_t 562nfs_curusec() 563{ 564 struct timeval tv; 565 566 getmicrotime(&tv); 567 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 568} 569 570/* 571 * Create the header for an rpc request packet 572 * The hsiz is the size of the rest of the nfs request header. 573 * (just used to decide if a cluster is a good idea) 574 */ 575struct mbuf * 576nfsm_reqh(vp, procid, hsiz, bposp) 577 struct vnode *vp; 578 u_long procid; 579 int hsiz; 580 caddr_t *bposp; 581{ 582 register struct mbuf *mb; 583 register u_long *tl; 584 register caddr_t bpos; 585 struct mbuf *mb2; 586 struct nfsmount *nmp; 587 int nqflag; 588 589 MGET(mb, M_WAIT, MT_DATA); 590 if (hsiz >= MINCLSIZE) 591 MCLGET(mb, M_WAIT); 592 mb->m_len = 0; 593 bpos = mtod(mb, caddr_t); 594 595 /* 596 * For NQNFS, add lease request. 597 */ 598 if (vp) { 599 nmp = VFSTONFS(vp->v_mount); 600 if (nmp->nm_flag & NFSMNT_NQNFS) { 601 nqflag = NQNFS_NEEDLEASE(vp, procid); 602 if (nqflag) { 603 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 604 *tl++ = txdr_unsigned(nqflag); 605 *tl = txdr_unsigned(nmp->nm_leaseterm); 606 } else { 607 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 608 *tl = 0; 609 } 610 } 611 } 612 /* Finally, return values */ 613 *bposp = bpos; 614 return (mb); 615} 616 617/* 618 * Build the RPC header and fill in the authorization info. 619 * The authorization string argument is only used when the credentials 620 * come from outside of the kernel. 621 * Returns the head of the mbuf list. 622 */ 623struct mbuf * 624nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 625 verf_str, mrest, mrest_len, mbp, xidp) 626 register struct ucred *cr; 627 int nmflag; 628 int procid; 629 int auth_type; 630 int auth_len; 631 char *auth_str; 632 int verf_len; 633 char *verf_str; 634 struct mbuf *mrest; 635 int mrest_len; 636 struct mbuf **mbp; 637 u_long *xidp; 638{ 639 register struct mbuf *mb; 640 register u_long *tl; 641 register caddr_t bpos; 642 register int i; 643 struct mbuf *mreq, *mb2; 644 int siz, grpsiz, authsiz; 645 struct timeval tv; 646 static u_long base; 647 648 authsiz = nfsm_rndup(auth_len); 649 MGETHDR(mb, M_WAIT, MT_DATA); 650 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 651 MCLGET(mb, M_WAIT); 652 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 653 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 654 } else { 655 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 656 } 657 mb->m_len = 0; 658 mreq = mb; 659 bpos = mtod(mb, caddr_t); 660 661 /* 662 * First the RPC header. 663 */ 664 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 665 666 /* 667 * derive initial xid from system time 668 * XXX time is invalid if root not yet mounted 669 */ 670 if (!base && (rootvp)) { 671 microtime(&tv); 672 base = tv.tv_sec << 12; 673 nfs_xid = base; 674 } 675 /* 676 * Skip zero xid if it should ever happen. 677 */ 678 if (++nfs_xid == 0) 679 nfs_xid++; 680 681 *tl++ = *xidp = txdr_unsigned(nfs_xid); 682 *tl++ = rpc_call; 683 *tl++ = rpc_vers; 684 if (nmflag & NFSMNT_NQNFS) { 685 *tl++ = txdr_unsigned(NQNFS_PROG); 686 *tl++ = txdr_unsigned(NQNFS_VER3); 687 } else { 688 *tl++ = txdr_unsigned(NFS_PROG); 689 if (nmflag & NFSMNT_NFSV3) 690 *tl++ = txdr_unsigned(NFS_VER3); 691 else 692 *tl++ = txdr_unsigned(NFS_VER2); 693 } 694 if (nmflag & NFSMNT_NFSV3) 695 *tl++ = txdr_unsigned(procid); 696 else 697 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 698 699 /* 700 * And then the authorization cred. 701 */ 702 *tl++ = txdr_unsigned(auth_type); 703 *tl = txdr_unsigned(authsiz); 704 switch (auth_type) { 705 case RPCAUTH_UNIX: 706 nfsm_build(tl, u_long *, auth_len); 707 *tl++ = 0; /* stamp ?? */ 708 *tl++ = 0; /* NULL hostname */ 709 *tl++ = txdr_unsigned(cr->cr_uid); 710 *tl++ = txdr_unsigned(cr->cr_groups[0]); 711 grpsiz = (auth_len >> 2) - 5; 712 *tl++ = txdr_unsigned(grpsiz); 713 for (i = 1; i <= grpsiz; i++) 714 *tl++ = txdr_unsigned(cr->cr_groups[i]); 715 break; 716 case RPCAUTH_KERB4: 717 siz = auth_len; 718 while (siz > 0) { 719 if (M_TRAILINGSPACE(mb) == 0) { 720 MGET(mb2, M_WAIT, MT_DATA); 721 if (siz >= MINCLSIZE) 722 MCLGET(mb2, M_WAIT); 723 mb->m_next = mb2; 724 mb = mb2; 725 mb->m_len = 0; 726 bpos = mtod(mb, caddr_t); 727 } 728 i = min(siz, M_TRAILINGSPACE(mb)); 729 bcopy(auth_str, bpos, i); 730 mb->m_len += i; 731 auth_str += i; 732 bpos += i; 733 siz -= i; 734 } 735 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 736 for (i = 0; i < siz; i++) 737 *bpos++ = '\0'; 738 mb->m_len += siz; 739 } 740 break; 741 }; 742 743 /* 744 * And the verifier... 745 */ 746 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 747 if (verf_str) { 748 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 749 *tl = txdr_unsigned(verf_len); 750 siz = verf_len; 751 while (siz > 0) { 752 if (M_TRAILINGSPACE(mb) == 0) { 753 MGET(mb2, M_WAIT, MT_DATA); 754 if (siz >= MINCLSIZE) 755 MCLGET(mb2, M_WAIT); 756 mb->m_next = mb2; 757 mb = mb2; 758 mb->m_len = 0; 759 bpos = mtod(mb, caddr_t); 760 } 761 i = min(siz, M_TRAILINGSPACE(mb)); 762 bcopy(verf_str, bpos, i); 763 mb->m_len += i; 764 verf_str += i; 765 bpos += i; 766 siz -= i; 767 } 768 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 769 for (i = 0; i < siz; i++) 770 *bpos++ = '\0'; 771 mb->m_len += siz; 772 } 773 } else { 774 *tl++ = txdr_unsigned(RPCAUTH_NULL); 775 *tl = 0; 776 } 777 mb->m_next = mrest; 778 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 779 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 780 *mbp = mb; 781 return (mreq); 782} 783 784/* 785 * copies mbuf chain to the uio scatter/gather list 786 */ 787int 788nfsm_mbuftouio(mrep, uiop, siz, dpos) 789 struct mbuf **mrep; 790 register struct uio *uiop; 791 int siz; 792 caddr_t *dpos; 793{ 794 register char *mbufcp, *uiocp; 795 register int xfer, left, len; 796 register struct mbuf *mp; 797 long uiosiz, rem; 798 int error = 0; 799 800 mp = *mrep; 801 mbufcp = *dpos; 802 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 803 rem = nfsm_rndup(siz)-siz; 804 while (siz > 0) { 805 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 806 return (EFBIG); 807 left = uiop->uio_iov->iov_len; 808 uiocp = uiop->uio_iov->iov_base; 809 if (left > siz) 810 left = siz; 811 uiosiz = left; 812 while (left > 0) { 813 while (len == 0) { 814 mp = mp->m_next; 815 if (mp == NULL) 816 return (EBADRPC); 817 mbufcp = mtod(mp, caddr_t); 818 len = mp->m_len; 819 } 820 xfer = (left > len) ? len : left; 821#ifdef notdef 822 /* Not Yet.. */ 823 if (uiop->uio_iov->iov_op != NULL) 824 (*(uiop->uio_iov->iov_op)) 825 (mbufcp, uiocp, xfer); 826 else 827#endif 828 if (uiop->uio_segflg == UIO_SYSSPACE) 829 bcopy(mbufcp, uiocp, xfer); 830 else 831 copyout(mbufcp, uiocp, xfer); 832 left -= xfer; 833 len -= xfer; 834 mbufcp += xfer; 835 uiocp += xfer; 836 uiop->uio_offset += xfer; 837 uiop->uio_resid -= xfer; 838 } 839 if (uiop->uio_iov->iov_len <= siz) { 840 uiop->uio_iovcnt--; 841 uiop->uio_iov++; 842 } else { 843 uiop->uio_iov->iov_base += uiosiz; 844 uiop->uio_iov->iov_len -= uiosiz; 845 } 846 siz -= uiosiz; 847 } 848 *dpos = mbufcp; 849 *mrep = mp; 850 if (rem > 0) { 851 if (len < rem) 852 error = nfs_adv(mrep, dpos, rem, len); 853 else 854 *dpos += rem; 855 } 856 return (error); 857} 858 859/* 860 * copies a uio scatter/gather list to an mbuf chain. 861 * NOTE: can ony handle iovcnt == 1 862 */ 863int 864nfsm_uiotombuf(uiop, mq, siz, bpos) 865 register struct uio *uiop; 866 struct mbuf **mq; 867 int siz; 868 caddr_t *bpos; 869{ 870 register char *uiocp; 871 register struct mbuf *mp, *mp2; 872 register int xfer, left, mlen; 873 int uiosiz, clflg, rem; 874 char *cp; 875 876 if (uiop->uio_iovcnt != 1) 877 panic("nfsm_uiotombuf: iovcnt != 1"); 878 879 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 880 clflg = 1; 881 else 882 clflg = 0; 883 rem = nfsm_rndup(siz)-siz; 884 mp = mp2 = *mq; 885 while (siz > 0) { 886 left = uiop->uio_iov->iov_len; 887 uiocp = uiop->uio_iov->iov_base; 888 if (left > siz) 889 left = siz; 890 uiosiz = left; 891 while (left > 0) { 892 mlen = M_TRAILINGSPACE(mp); 893 if (mlen == 0) { 894 MGET(mp, M_WAIT, MT_DATA); 895 if (clflg) 896 MCLGET(mp, M_WAIT); 897 mp->m_len = 0; 898 mp2->m_next = mp; 899 mp2 = mp; 900 mlen = M_TRAILINGSPACE(mp); 901 } 902 xfer = (left > mlen) ? mlen : left; 903#ifdef notdef 904 /* Not Yet.. */ 905 if (uiop->uio_iov->iov_op != NULL) 906 (*(uiop->uio_iov->iov_op)) 907 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 908 else 909#endif 910 if (uiop->uio_segflg == UIO_SYSSPACE) 911 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 912 else 913 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 914 mp->m_len += xfer; 915 left -= xfer; 916 uiocp += xfer; 917 uiop->uio_offset += xfer; 918 uiop->uio_resid -= xfer; 919 } 920 uiop->uio_iov->iov_base += uiosiz; 921 uiop->uio_iov->iov_len -= uiosiz; 922 siz -= uiosiz; 923 } 924 if (rem > 0) { 925 if (rem > M_TRAILINGSPACE(mp)) { 926 MGET(mp, M_WAIT, MT_DATA); 927 mp->m_len = 0; 928 mp2->m_next = mp; 929 } 930 cp = mtod(mp, caddr_t)+mp->m_len; 931 for (left = 0; left < rem; left++) 932 *cp++ = '\0'; 933 mp->m_len += rem; 934 *bpos = cp; 935 } else 936 *bpos = mtod(mp, caddr_t)+mp->m_len; 937 *mq = mp; 938 return (0); 939} 940 941/* 942 * Help break down an mbuf chain by setting the first siz bytes contiguous 943 * pointed to by returned val. 944 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 945 * cases. (The macros use the vars. dpos and dpos2) 946 */ 947int 948nfsm_disct(mdp, dposp, siz, left, cp2) 949 struct mbuf **mdp; 950 caddr_t *dposp; 951 int siz; 952 int left; 953 caddr_t *cp2; 954{ 955 register struct mbuf *mp, *mp2; 956 register int siz2, xfer; 957 register caddr_t p; 958 959 mp = *mdp; 960 while (left == 0) { 961 *mdp = mp = mp->m_next; 962 if (mp == NULL) 963 return (EBADRPC); 964 left = mp->m_len; 965 *dposp = mtod(mp, caddr_t); 966 } 967 if (left >= siz) { 968 *cp2 = *dposp; 969 *dposp += siz; 970 } else if (mp->m_next == NULL) { 971 return (EBADRPC); 972 } else if (siz > MHLEN) { 973 panic("nfs S too big"); 974 } else { 975 MGET(mp2, M_WAIT, MT_DATA); 976 mp2->m_next = mp->m_next; 977 mp->m_next = mp2; 978 mp->m_len -= left; 979 mp = mp2; 980 *cp2 = p = mtod(mp, caddr_t); 981 bcopy(*dposp, p, left); /* Copy what was left */ 982 siz2 = siz-left; 983 p += left; 984 mp2 = mp->m_next; 985 /* Loop around copying up the siz2 bytes */ 986 while (siz2 > 0) { 987 if (mp2 == NULL) 988 return (EBADRPC); 989 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 990 if (xfer > 0) { 991 bcopy(mtod(mp2, caddr_t), p, xfer); 992 NFSMADV(mp2, xfer); 993 mp2->m_len -= xfer; 994 p += xfer; 995 siz2 -= xfer; 996 } 997 if (siz2 > 0) 998 mp2 = mp2->m_next; 999 } 1000 mp->m_len = siz; 1001 *mdp = mp2; 1002 *dposp = mtod(mp2, caddr_t); 1003 } 1004 return (0); 1005} 1006 1007/* 1008 * Advance the position in the mbuf chain. 1009 */ 1010int 1011nfs_adv(mdp, dposp, offs, left) 1012 struct mbuf **mdp; 1013 caddr_t *dposp; 1014 int offs; 1015 int left; 1016{ 1017 register struct mbuf *m; 1018 register int s; 1019 1020 m = *mdp; 1021 s = left; 1022 while (s < offs) { 1023 offs -= s; 1024 m = m->m_next; 1025 if (m == NULL) 1026 return (EBADRPC); 1027 s = m->m_len; 1028 } 1029 *mdp = m; 1030 *dposp = mtod(m, caddr_t)+offs; 1031 return (0); 1032} 1033 1034/* 1035 * Copy a string into mbufs for the hard cases... 1036 */ 1037int 1038nfsm_strtmbuf(mb, bpos, cp, siz) 1039 struct mbuf **mb; 1040 char **bpos; 1041 char *cp; 1042 long siz; 1043{ 1044 register struct mbuf *m1 = 0, *m2; 1045 long left, xfer, len, tlen; 1046 u_long *tl; 1047 int putsize; 1048 1049 putsize = 1; 1050 m2 = *mb; 1051 left = M_TRAILINGSPACE(m2); 1052 if (left > 0) { 1053 tl = ((u_long *)(*bpos)); 1054 *tl++ = txdr_unsigned(siz); 1055 putsize = 0; 1056 left -= NFSX_UNSIGNED; 1057 m2->m_len += NFSX_UNSIGNED; 1058 if (left > 0) { 1059 bcopy(cp, (caddr_t) tl, left); 1060 siz -= left; 1061 cp += left; 1062 m2->m_len += left; 1063 left = 0; 1064 } 1065 } 1066 /* Loop around adding mbufs */ 1067 while (siz > 0) { 1068 MGET(m1, M_WAIT, MT_DATA); 1069 if (siz > MLEN) 1070 MCLGET(m1, M_WAIT); 1071 m1->m_len = NFSMSIZ(m1); 1072 m2->m_next = m1; 1073 m2 = m1; 1074 tl = mtod(m1, u_long *); 1075 tlen = 0; 1076 if (putsize) { 1077 *tl++ = txdr_unsigned(siz); 1078 m1->m_len -= NFSX_UNSIGNED; 1079 tlen = NFSX_UNSIGNED; 1080 putsize = 0; 1081 } 1082 if (siz < m1->m_len) { 1083 len = nfsm_rndup(siz); 1084 xfer = siz; 1085 if (xfer < len) 1086 *(tl+(xfer>>2)) = 0; 1087 } else { 1088 xfer = len = m1->m_len; 1089 } 1090 bcopy(cp, (caddr_t) tl, xfer); 1091 m1->m_len = len+tlen; 1092 siz -= xfer; 1093 cp += xfer; 1094 } 1095 *mb = m1; 1096 *bpos = mtod(m1, caddr_t)+m1->m_len; 1097 return (0); 1098} 1099 1100/* 1101 * Called once to initialize data structures... 1102 */ 1103int 1104nfs_init(vfsp) 1105 struct vfsconf *vfsp; 1106{ 1107 register int i; 1108 1109 /* 1110 * Check to see if major data structures haven't bloated. 1111 */ 1112 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1113 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1114 printf("Try reducing NFS_SMALLFH\n"); 1115 } 1116 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1117 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1118 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1119 } 1120 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1121 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1122 printf("Try reducing NFS_UIDHASHSIZ\n"); 1123 } 1124 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1125 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1126 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1127 } 1128 nfs_mount_type = vfsp->vfc_typenum; 1129 nfsrtt.pos = 0; 1130 rpc_vers = txdr_unsigned(RPC_VER2); 1131 rpc_call = txdr_unsigned(RPC_CALL); 1132 rpc_reply = txdr_unsigned(RPC_REPLY); 1133 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1134 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1135 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1136 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1137 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1138 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1139 nfs_prog = txdr_unsigned(NFS_PROG); 1140 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1141 nfs_true = txdr_unsigned(TRUE); 1142 nfs_false = txdr_unsigned(FALSE); 1143 nfs_xdrneg1 = txdr_unsigned(-1); 1144 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1145 if (nfs_ticks < 1) 1146 nfs_ticks = 1; 1147 /* Ensure async daemons disabled */ 1148 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1149 nfs_iodwant[i] = (struct proc *)0; 1150 nfs_iodmount[i] = (struct nfsmount *)0; 1151 } 1152 nfs_nhinit(); /* Init the nfsnode table */ 1153#ifndef NFS_NOSERVER 1154 nfsrv_init(0); /* Init server data structures */ 1155 nfsrv_initcache(); /* Init the server request cache */ 1156#endif 1157 1158 /* 1159 * Initialize the nqnfs server stuff. 1160 */ 1161 if (nqnfsstarttime == 0) { 1162 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1163 + nqsrv_clockskew + nqsrv_writeslack; 1164 NQLOADNOVRAM(nqnfsstarttime); 1165 CIRCLEQ_INIT(&nqtimerhead); 1166 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1167 } 1168 1169 /* 1170 * Initialize reply list and start timer 1171 */ 1172 TAILQ_INIT(&nfs_reqq); 1173 1174 nfs_timer(0); 1175 1176 1177 /* 1178 * Set up lease_check and lease_updatetime so that other parts 1179 * of the system can call us, if we are loadable. 1180 */ 1181#ifndef NFS_NOSERVER 1182 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1183#endif 1184 lease_updatetime = nfs_lease_updatetime; 1185 vfsp->vfc_refcount++; /* make us non-unloadable */ 1186 sysent[SYS_nfssvc].sy_narg = 2; 1187 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1188#ifndef NFS_NOSERVER 1189 sysent[SYS_getfh].sy_narg = 2; 1190 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1191#endif 1192 1193 return (0); 1194} 1195 1196/* 1197 * Attribute cache routines. 1198 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1199 * that are on the mbuf list 1200 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1201 * error otherwise 1202 */ 1203 1204/* 1205 * Load the attribute cache (that lives in the nfsnode entry) with 1206 * the values on the mbuf list and 1207 * Iff vap not NULL 1208 * copy the attributes to *vaper 1209 */ 1210int 1211nfs_loadattrcache(vpp, mdp, dposp, vaper) 1212 struct vnode **vpp; 1213 struct mbuf **mdp; 1214 caddr_t *dposp; 1215 struct vattr *vaper; 1216{ 1217 register struct vnode *vp = *vpp; 1218 register struct vattr *vap; 1219 register struct nfs_fattr *fp; 1220 register struct nfsnode *np; 1221 register long t1; 1222 caddr_t cp2; 1223 int error = 0, rdev; 1224 struct mbuf *md; 1225 enum vtype vtyp; 1226 u_short vmode; 1227 struct timespec mtime; 1228 struct vnode *nvp; 1229 int v3 = NFS_ISV3(vp); 1230 1231 md = *mdp; 1232 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1233 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1234 return (error); 1235 fp = (struct nfs_fattr *)cp2; 1236 if (v3) { 1237 vtyp = nfsv3tov_type(fp->fa_type); 1238 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1239 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1240 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1241 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1242 } else { 1243 vtyp = nfsv2tov_type(fp->fa_type); 1244 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1245 /* 1246 * XXX 1247 * 1248 * The duplicate information returned in fa_type and fa_mode 1249 * is an ambiguity in the NFS version 2 protocol. 1250 * 1251 * VREG should be taken literally as a regular file. If a 1252 * server intents to return some type information differently 1253 * in the upper bits of the mode field (e.g. for sockets, or 1254 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1255 * leave the examination of the mode bits even in the VREG 1256 * case to avoid breakage for bogus servers, but we make sure 1257 * that there are actually type bits set in the upper part of 1258 * fa_mode (and failing that, trust the va_type field). 1259 * 1260 * NFSv3 cleared the issue, and requires fa_mode to not 1261 * contain any type information (while also introduing sockets 1262 * and FIFOs for fa_type). 1263 */ 1264 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1265 vtyp = IFTOVT(vmode); 1266 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1267 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1268 1269 /* 1270 * Really ugly NFSv2 kludge. 1271 */ 1272 if (vtyp == VCHR && rdev == 0xffffffff) 1273 vtyp = VFIFO; 1274 } 1275 1276 /* 1277 * If v_type == VNON it is a new node, so fill in the v_type, 1278 * n_mtime fields. Check to see if it represents a special 1279 * device, and if so, check for a possible alias. Once the 1280 * correct vnode has been obtained, fill in the rest of the 1281 * information. 1282 */ 1283 np = VTONFS(vp); 1284 if (vp->v_type != vtyp) { 1285 vp->v_type = vtyp; 1286 if (vp->v_type == VFIFO) { 1287 vp->v_op = fifo_nfsv2nodeop_p; 1288 } 1289 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1290 vp->v_op = spec_nfsv2nodeop_p; 1291 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1292 if (nvp) { 1293 /* 1294 * Discard unneeded vnode, but save its nfsnode. 1295 * Since the nfsnode does not have a lock, its 1296 * vnode lock has to be carried over. 1297 */ 1298 nvp->v_vnlock = vp->v_vnlock; 1299 vp->v_vnlock = NULL; 1300 nvp->v_data = vp->v_data; 1301 vp->v_data = NULL; 1302 vp->v_op = spec_vnodeop_p; 1303 vrele(vp); 1304 vgone(vp); 1305 /* 1306 * Reinitialize aliased node. 1307 */ 1308 np->n_vnode = nvp; 1309 *vpp = vp = nvp; 1310 } 1311 } 1312 np->n_mtime = mtime.tv_sec; 1313 } 1314 vap = &np->n_vattr; 1315 vap->va_type = vtyp; 1316 vap->va_mode = (vmode & 07777); 1317 vap->va_rdev = (dev_t)rdev; 1318 vap->va_mtime = mtime; 1319 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1320 if (v3) { 1321 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1322 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1323 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1324 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1325 vap->va_blocksize = NFS_FABLKSIZE; 1326 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1327 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1328 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1329 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1330 vap->va_flags = 0; 1331 vap->va_filerev = 0; 1332 } else { 1333 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1334 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1335 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1336 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1337 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1338 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1339 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1340 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1341 vap->va_flags = 0; 1342 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1343 vap->va_ctime.tv_nsec = 0; 1344 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1345 vap->va_filerev = 0; 1346 } 1347 if (vap->va_size != np->n_size) { 1348 if (vap->va_type == VREG) { 1349 if (np->n_flag & NMODIFIED) { 1350 if (vap->va_size < np->n_size) 1351 vap->va_size = np->n_size; 1352 else 1353 np->n_size = vap->va_size; 1354 } else 1355 np->n_size = vap->va_size; 1356 vnode_pager_setsize(vp, (u_long)np->n_size); 1357 } else 1358 np->n_size = vap->va_size; 1359 } 1360 np->n_attrstamp = time_second; 1361 if (vaper != NULL) { 1362 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1363 if (np->n_flag & NCHG) { 1364 if (np->n_flag & NACC) 1365 vaper->va_atime = np->n_atim; 1366 if (np->n_flag & NUPD) 1367 vaper->va_mtime = np->n_mtim; 1368 } 1369 } 1370 return (0); 1371} 1372 1373/* 1374 * Check the time stamp 1375 * If the cache is valid, copy contents to *vap and return 0 1376 * otherwise return an error 1377 */ 1378int 1379nfs_getattrcache(vp, vaper) 1380 register struct vnode *vp; 1381 struct vattr *vaper; 1382{ 1383 register struct nfsnode *np = VTONFS(vp); 1384 register struct vattr *vap; 1385 1386 if ((time_second - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1387 nfsstats.attrcache_misses++; 1388 return (ENOENT); 1389 } 1390 nfsstats.attrcache_hits++; 1391 vap = &np->n_vattr; 1392 if (vap->va_size != np->n_size) { 1393 if (vap->va_type == VREG) { 1394 if (np->n_flag & NMODIFIED) { 1395 if (vap->va_size < np->n_size) 1396 vap->va_size = np->n_size; 1397 else 1398 np->n_size = vap->va_size; 1399 } else 1400 np->n_size = vap->va_size; 1401 vnode_pager_setsize(vp, (u_long)np->n_size); 1402 } else 1403 np->n_size = vap->va_size; 1404 } 1405 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1406 if (np->n_flag & NCHG) { 1407 if (np->n_flag & NACC) 1408 vaper->va_atime = np->n_atim; 1409 if (np->n_flag & NUPD) 1410 vaper->va_mtime = np->n_mtim; 1411 } 1412 return (0); 1413} 1414 1415#ifndef NFS_NOSERVER 1416/* 1417 * Set up nameidata for a lookup() call and do it. 1418 * 1419 * If pubflag is set, this call is done for a lookup operation on the 1420 * public filehandle. In that case we allow crossing mountpoints and 1421 * absolute pathnames. However, the caller is expected to check that 1422 * the lookup result is within the public fs, and deny access if 1423 * it is not. 1424 */ 1425int 1426nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1427 register struct nameidata *ndp; 1428 fhandle_t *fhp; 1429 int len; 1430 struct nfssvc_sock *slp; 1431 struct sockaddr *nam; 1432 struct mbuf **mdp; 1433 caddr_t *dposp; 1434 struct vnode **retdirp; 1435 struct proc *p; 1436 int kerbflag, pubflag; 1437{ 1438 register int i, rem; 1439 register struct mbuf *md; 1440 register char *fromcp, *tocp, *cp; 1441 struct iovec aiov; 1442 struct uio auio; 1443 struct vnode *dp; 1444 int error, rdonly, linklen; 1445 struct componentname *cnp = &ndp->ni_cnd; 1446 1447 *retdirp = (struct vnode *)0; 1448 cnp->cn_pnbuf = zalloc(namei_zone); 1449 1450 /* 1451 * Copy the name from the mbuf list to ndp->ni_pnbuf 1452 * and set the various ndp fields appropriately. 1453 */ 1454 fromcp = *dposp; 1455 tocp = cnp->cn_pnbuf; 1456 md = *mdp; 1457 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1458 cnp->cn_hash = 0; 1459 for (i = 0; i < len; i++) { 1460 while (rem == 0) { 1461 md = md->m_next; 1462 if (md == NULL) { 1463 error = EBADRPC; 1464 goto out; 1465 } 1466 fromcp = mtod(md, caddr_t); 1467 rem = md->m_len; 1468 } 1469 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1470 error = EACCES; 1471 goto out; 1472 } 1473 cnp->cn_hash += (unsigned char)*fromcp; 1474 *tocp++ = *fromcp++; 1475 rem--; 1476 } 1477 *tocp = '\0'; 1478 *mdp = md; 1479 *dposp = fromcp; 1480 len = nfsm_rndup(len)-len; 1481 if (len > 0) { 1482 if (rem >= len) 1483 *dposp += len; 1484 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1485 goto out; 1486 } 1487 1488 /* 1489 * Extract and set starting directory. 1490 */ 1491 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1492 nam, &rdonly, kerbflag, pubflag); 1493 if (error) 1494 goto out; 1495 if (dp->v_type != VDIR) { 1496 vrele(dp); 1497 error = ENOTDIR; 1498 goto out; 1499 } 1500 1501 if (rdonly) 1502 cnp->cn_flags |= RDONLY; 1503 1504 *retdirp = dp; 1505 1506 if (pubflag) { 1507 /* 1508 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1509 * and the 'native path' indicator. 1510 */ 1511 cp = zalloc(namei_zone); 1512 fromcp = cnp->cn_pnbuf; 1513 tocp = cp; 1514 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1515 switch ((unsigned char)*fromcp) { 1516 case WEBNFS_NATIVE_CHAR: 1517 /* 1518 * 'Native' path for us is the same 1519 * as a path according to the NFS spec, 1520 * just skip the escape char. 1521 */ 1522 fromcp++; 1523 break; 1524 /* 1525 * More may be added in the future, range 0x80-0xff 1526 */ 1527 default: 1528 error = EIO; 1529 zfree(namei_zone, cp); 1530 goto out; 1531 } 1532 } 1533 /* 1534 * Translate the '%' escapes, URL-style. 1535 */ 1536 while (*fromcp != '\0') { 1537 if (*fromcp == WEBNFS_ESC_CHAR) { 1538 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1539 fromcp++; 1540 *tocp++ = HEXSTRTOI(fromcp); 1541 fromcp += 2; 1542 continue; 1543 } else { 1544 error = ENOENT; 1545 zfree(namei_zone, cp); 1546 goto out; 1547 } 1548 } else 1549 *tocp++ = *fromcp++; 1550 } 1551 *tocp = '\0'; 1552 zfree(namei_zone, cnp->cn_pnbuf); 1553 cnp->cn_pnbuf = cp; 1554 } 1555 1556 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1557 ndp->ni_segflg = UIO_SYSSPACE; 1558 1559 if (pubflag) { 1560 ndp->ni_rootdir = rootvnode; 1561 ndp->ni_loopcnt = 0; 1562 if (cnp->cn_pnbuf[0] == '/') 1563 dp = rootvnode; 1564 } else { 1565 cnp->cn_flags |= NOCROSSMOUNT; 1566 } 1567 1568 cnp->cn_proc = p; 1569 VREF(dp); 1570 1571 for (;;) { 1572 cnp->cn_nameptr = cnp->cn_pnbuf; 1573 ndp->ni_startdir = dp; 1574 /* 1575 * And call lookup() to do the real work 1576 */ 1577 error = lookup(ndp); 1578 if (error) 1579 break; 1580 /* 1581 * Check for encountering a symbolic link 1582 */ 1583 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1584 nfsrv_object_create(ndp->ni_vp); 1585 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1586 cnp->cn_flags |= HASBUF; 1587 return (0); 1588 } 1589 break; 1590 } else { 1591 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1592 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1593 if (!pubflag) { 1594 vrele(ndp->ni_dvp); 1595 vput(ndp->ni_vp); 1596 ndp->ni_vp = NULL; 1597 error = EINVAL; 1598 break; 1599 } 1600 1601 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1602 error = ELOOP; 1603 break; 1604 } 1605 if (ndp->ni_pathlen > 1) 1606 cp = zalloc(namei_zone); 1607 else 1608 cp = cnp->cn_pnbuf; 1609 aiov.iov_base = cp; 1610 aiov.iov_len = MAXPATHLEN; 1611 auio.uio_iov = &aiov; 1612 auio.uio_iovcnt = 1; 1613 auio.uio_offset = 0; 1614 auio.uio_rw = UIO_READ; 1615 auio.uio_segflg = UIO_SYSSPACE; 1616 auio.uio_procp = (struct proc *)0; 1617 auio.uio_resid = MAXPATHLEN; 1618 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1619 if (error) { 1620 badlink: 1621 if (ndp->ni_pathlen > 1) 1622 zfree(namei_zone, cp); 1623 break; 1624 } 1625 linklen = MAXPATHLEN - auio.uio_resid; 1626 if (linklen == 0) { 1627 error = ENOENT; 1628 goto badlink; 1629 } 1630 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1631 error = ENAMETOOLONG; 1632 goto badlink; 1633 } 1634 if (ndp->ni_pathlen > 1) { 1635 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1636 zfree(namei_zone, cnp->cn_pnbuf); 1637 cnp->cn_pnbuf = cp; 1638 } else 1639 cnp->cn_pnbuf[linklen] = '\0'; 1640 ndp->ni_pathlen += linklen; 1641 vput(ndp->ni_vp); 1642 dp = ndp->ni_dvp; 1643 /* 1644 * Check if root directory should replace current directory. 1645 */ 1646 if (cnp->cn_pnbuf[0] == '/') { 1647 vrele(dp); 1648 dp = ndp->ni_rootdir; 1649 VREF(dp); 1650 } 1651 } 1652 } 1653out: 1654 zfree(namei_zone, cnp->cn_pnbuf); 1655 return (error); 1656} 1657 1658/* 1659 * A fiddled version of m_adj() that ensures null fill to a long 1660 * boundary and only trims off the back end 1661 */ 1662void 1663nfsm_adj(mp, len, nul) 1664 struct mbuf *mp; 1665 register int len; 1666 int nul; 1667{ 1668 register struct mbuf *m; 1669 register int count, i; 1670 register char *cp; 1671 1672 /* 1673 * Trim from tail. Scan the mbuf chain, 1674 * calculating its length and finding the last mbuf. 1675 * If the adjustment only affects this mbuf, then just 1676 * adjust and return. Otherwise, rescan and truncate 1677 * after the remaining size. 1678 */ 1679 count = 0; 1680 m = mp; 1681 for (;;) { 1682 count += m->m_len; 1683 if (m->m_next == (struct mbuf *)0) 1684 break; 1685 m = m->m_next; 1686 } 1687 if (m->m_len > len) { 1688 m->m_len -= len; 1689 if (nul > 0) { 1690 cp = mtod(m, caddr_t)+m->m_len-nul; 1691 for (i = 0; i < nul; i++) 1692 *cp++ = '\0'; 1693 } 1694 return; 1695 } 1696 count -= len; 1697 if (count < 0) 1698 count = 0; 1699 /* 1700 * Correct length for chain is "count". 1701 * Find the mbuf with last data, adjust its length, 1702 * and toss data from remaining mbufs on chain. 1703 */ 1704 for (m = mp; m; m = m->m_next) { 1705 if (m->m_len >= count) { 1706 m->m_len = count; 1707 if (nul > 0) { 1708 cp = mtod(m, caddr_t)+m->m_len-nul; 1709 for (i = 0; i < nul; i++) 1710 *cp++ = '\0'; 1711 } 1712 break; 1713 } 1714 count -= m->m_len; 1715 } 1716 for (m = m->m_next;m;m = m->m_next) 1717 m->m_len = 0; 1718} 1719 1720/* 1721 * Make these functions instead of macros, so that the kernel text size 1722 * doesn't get too big... 1723 */ 1724void 1725nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1726 struct nfsrv_descript *nfsd; 1727 int before_ret; 1728 register struct vattr *before_vap; 1729 int after_ret; 1730 struct vattr *after_vap; 1731 struct mbuf **mbp; 1732 char **bposp; 1733{ 1734 register struct mbuf *mb = *mbp, *mb2; 1735 register char *bpos = *bposp; 1736 register u_long *tl; 1737 1738 if (before_ret) { 1739 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1740 *tl = nfs_false; 1741 } else { 1742 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1743 *tl++ = nfs_true; 1744 txdr_hyper(&(before_vap->va_size), tl); 1745 tl += 2; 1746 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1747 tl += 2; 1748 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1749 } 1750 *bposp = bpos; 1751 *mbp = mb; 1752 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1753} 1754 1755void 1756nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1757 struct nfsrv_descript *nfsd; 1758 int after_ret; 1759 struct vattr *after_vap; 1760 struct mbuf **mbp; 1761 char **bposp; 1762{ 1763 register struct mbuf *mb = *mbp, *mb2; 1764 register char *bpos = *bposp; 1765 register u_long *tl; 1766 register struct nfs_fattr *fp; 1767 1768 if (after_ret) { 1769 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1770 *tl = nfs_false; 1771 } else { 1772 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1773 *tl++ = nfs_true; 1774 fp = (struct nfs_fattr *)tl; 1775 nfsm_srvfattr(nfsd, after_vap, fp); 1776 } 1777 *mbp = mb; 1778 *bposp = bpos; 1779} 1780 1781void 1782nfsm_srvfattr(nfsd, vap, fp) 1783 register struct nfsrv_descript *nfsd; 1784 register struct vattr *vap; 1785 register struct nfs_fattr *fp; 1786{ 1787 1788 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1789 fp->fa_uid = txdr_unsigned(vap->va_uid); 1790 fp->fa_gid = txdr_unsigned(vap->va_gid); 1791 if (nfsd->nd_flag & ND_NFSV3) { 1792 fp->fa_type = vtonfsv3_type(vap->va_type); 1793 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1794 txdr_hyper(&vap->va_size, &fp->fa3_size); 1795 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1796 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1797 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1798 fp->fa3_fsid.nfsuquad[0] = 0; 1799 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1800 fp->fa3_fileid.nfsuquad[0] = 0; 1801 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1802 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1803 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1804 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1805 } else { 1806 fp->fa_type = vtonfsv2_type(vap->va_type); 1807 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1808 fp->fa2_size = txdr_unsigned(vap->va_size); 1809 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1810 if (vap->va_type == VFIFO) 1811 fp->fa2_rdev = 0xffffffff; 1812 else 1813 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1814 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1815 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1816 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1817 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1818 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1819 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1820 } 1821} 1822 1823/* 1824 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1825 * - look up fsid in mount list (if not found ret error) 1826 * - get vp and export rights by calling VFS_FHTOVP() 1827 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1828 * - if not lockflag unlock it with VOP_UNLOCK() 1829 */ 1830int 1831nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1832 fhandle_t *fhp; 1833 int lockflag; 1834 struct vnode **vpp; 1835 struct ucred *cred; 1836 struct nfssvc_sock *slp; 1837 struct sockaddr *nam; 1838 int *rdonlyp; 1839 int kerbflag; 1840 int pubflag; 1841{ 1842 struct proc *p = curproc; /* XXX */ 1843 register struct mount *mp; 1844 register int i; 1845 struct ucred *credanon; 1846 int error, exflags; 1847 1848 *vpp = (struct vnode *)0; 1849 1850 if (nfs_ispublicfh(fhp)) { 1851 if (!pubflag || !nfs_pub.np_valid) 1852 return (ESTALE); 1853 fhp = &nfs_pub.np_handle; 1854 } 1855 1856 mp = vfs_getvfs(&fhp->fh_fsid); 1857 if (!mp) 1858 return (ESTALE); 1859 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1860 if (error) 1861 return (error); 1862 /* 1863 * Check/setup credentials. 1864 */ 1865 if (exflags & MNT_EXKERB) { 1866 if (!kerbflag) { 1867 vput(*vpp); 1868 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1869 } 1870 } else if (kerbflag) { 1871 vput(*vpp); 1872 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1873 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1874 cred->cr_uid = credanon->cr_uid; 1875 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1876 cred->cr_groups[i] = credanon->cr_groups[i]; 1877 cred->cr_ngroups = i; 1878 } 1879 if (exflags & MNT_EXRDONLY) 1880 *rdonlyp = 1; 1881 else 1882 *rdonlyp = 0; 1883 1884 nfsrv_object_create(*vpp); 1885 1886 if (!lockflag) 1887 VOP_UNLOCK(*vpp, 0, p); 1888 return (0); 1889} 1890 1891 1892/* 1893 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1894 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1895 * transformed this to all zeroes in both cases, so check for it. 1896 */ 1897int 1898nfs_ispublicfh(fhp) 1899 fhandle_t *fhp; 1900{ 1901 char *cp = (char *)fhp; 1902 int i; 1903 1904 for (i = 0; i < NFSX_V3FH; i++) 1905 if (*cp++ != 0) 1906 return (FALSE); 1907 return (TRUE); 1908} 1909 1910#endif /* NFS_NOSERVER */ 1911/* 1912 * This function compares two net addresses by family and returns TRUE 1913 * if they are the same host. 1914 * If there is any doubt, return FALSE. 1915 * The AF_INET family is handled as a special case so that address mbufs 1916 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1917 */ 1918int 1919netaddr_match(family, haddr, nam) 1920 int family; 1921 union nethostaddr *haddr; 1922 struct sockaddr *nam; 1923{ 1924 register struct sockaddr_in *inetaddr; 1925 1926 switch (family) { 1927 case AF_INET: 1928 inetaddr = (struct sockaddr_in *)nam; 1929 if (inetaddr->sin_family == AF_INET && 1930 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1931 return (1); 1932 break; 1933#ifdef ISO 1934 case AF_ISO: 1935 { 1936 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1937 1938 isoaddr1 = (struct sockaddr_iso *)nam; 1939 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1940 if (isoaddr1->siso_family == AF_ISO && 1941 isoaddr1->siso_nlen > 0 && 1942 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1943 SAME_ISOADDR(isoaddr1, isoaddr2)) 1944 return (1); 1945 break; 1946 } 1947#endif /* ISO */ 1948 default: 1949 break; 1950 }; 1951 return (0); 1952} 1953 1954static nfsuint64 nfs_nullcookie = { 0, 0 }; 1955/* 1956 * This function finds the directory cookie that corresponds to the 1957 * logical byte offset given. 1958 */ 1959nfsuint64 * 1960nfs_getcookie(np, off, add) 1961 register struct nfsnode *np; 1962 off_t off; 1963 int add; 1964{ 1965 register struct nfsdmap *dp, *dp2; 1966 register int pos; 1967 1968 pos = off / NFS_DIRBLKSIZ; 1969 if (pos == 0) { 1970#ifdef DIAGNOSTIC 1971 if (add) 1972 panic("nfs getcookie add at 0"); 1973#endif 1974 return (&nfs_nullcookie); 1975 } 1976 pos--; 1977 dp = np->n_cookies.lh_first; 1978 if (!dp) { 1979 if (add) { 1980 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1981 M_NFSDIROFF, M_WAITOK); 1982 dp->ndm_eocookie = 0; 1983 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1984 } else 1985 return ((nfsuint64 *)0); 1986 } 1987 while (pos >= NFSNUMCOOKIES) { 1988 pos -= NFSNUMCOOKIES; 1989 if (dp->ndm_list.le_next) { 1990 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1991 pos >= dp->ndm_eocookie) 1992 return ((nfsuint64 *)0); 1993 dp = dp->ndm_list.le_next; 1994 } else if (add) { 1995 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1996 M_NFSDIROFF, M_WAITOK); 1997 dp2->ndm_eocookie = 0; 1998 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1999 dp = dp2; 2000 } else 2001 return ((nfsuint64 *)0); 2002 } 2003 if (pos >= dp->ndm_eocookie) { 2004 if (add) 2005 dp->ndm_eocookie = pos + 1; 2006 else 2007 return ((nfsuint64 *)0); 2008 } 2009 return (&dp->ndm_cookies[pos]); 2010} 2011 2012/* 2013 * Invalidate cached directory information, except for the actual directory 2014 * blocks (which are invalidated separately). 2015 * Done mainly to avoid the use of stale offset cookies. 2016 */ 2017void 2018nfs_invaldir(vp) 2019 register struct vnode *vp; 2020{ 2021 register struct nfsnode *np = VTONFS(vp); 2022 2023#ifdef DIAGNOSTIC 2024 if (vp->v_type != VDIR) 2025 panic("nfs: invaldir not dir"); 2026#endif 2027 np->n_direofoffset = 0; 2028 np->n_cookieverf.nfsuquad[0] = 0; 2029 np->n_cookieverf.nfsuquad[1] = 0; 2030 if (np->n_cookies.lh_first) 2031 np->n_cookies.lh_first->ndm_eocookie = 0; 2032} 2033 2034/* 2035 * The write verifier has changed (probably due to a server reboot), so all 2036 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2037 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2038 * flag. Once done the new write verifier can be set for the mount point. 2039 */ 2040void 2041nfs_clearcommit(mp) 2042 struct mount *mp; 2043{ 2044 register struct vnode *vp, *nvp; 2045 register struct buf *bp, *nbp; 2046 int s; 2047 2048 s = splbio(); 2049loop: 2050 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2051 if (vp->v_mount != mp) /* Paranoia */ 2052 goto loop; 2053 nvp = vp->v_mntvnodes.le_next; 2054 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2055 nbp = bp->b_vnbufs.le_next; 2056 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2057 == (B_DELWRI | B_NEEDCOMMIT)) 2058 bp->b_flags &= ~B_NEEDCOMMIT; 2059 } 2060 } 2061 splx(s); 2062} 2063 2064#ifndef NFS_NOSERVER 2065/* 2066 * Map errnos to NFS error numbers. For Version 3 also filter out error 2067 * numbers not specified for the associated procedure. 2068 */ 2069int 2070nfsrv_errmap(nd, err) 2071 struct nfsrv_descript *nd; 2072 register int err; 2073{ 2074 register short *defaulterrp, *errp; 2075 2076 if (nd->nd_flag & ND_NFSV3) { 2077 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2078 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2079 while (*++errp) { 2080 if (*errp == err) 2081 return (err); 2082 else if (*errp > err) 2083 break; 2084 } 2085 return ((int)*defaulterrp); 2086 } else 2087 return (err & 0xffff); 2088 } 2089 if (err <= ELAST) 2090 return ((int)nfsrv_v2errmap[err - 1]); 2091 return (NFSERR_IO); 2092} 2093 2094int 2095nfsrv_object_create(vp) 2096 struct vnode *vp; 2097{ 2098 2099 if (vp == NULL || vp->v_type != VREG) 2100 return (1); 2101 return (vfs_object_create(vp, curproc, 2102 curproc ? curproc->p_ucred : NULL, 1)); 2103} 2104#endif /* NFS_NOSERVER */ 2105