nfs_srvsubs.c revision 27446
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 1.38 1997/04/04 17:49:29 dfr 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/proc.h> 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/mount.h> 50#include <sys/vnode.h> 51#include <sys/namei.h> 52#include <sys/mbuf.h> 53#include <sys/socket.h> 54#include <sys/stat.h> 55#include <sys/malloc.h> 56#include <sys/dirent.h> 57#ifdef VFS_LKM 58#include <sys/sysent.h> 59#include <sys/syscall.h> 60#endif 61 62#include <vm/vm.h> 63#include <vm/vm_param.h> 64#include <vm/vm_object.h> 65#include <vm/vm_extern.h> 66#include <vm/vnode_pager.h> 67 68#include <nfs/rpcv2.h> 69#include <nfs/nfsproto.h> 70#include <nfs/nfsnode.h> 71#include <nfs/nfs.h> 72#include <nfs/xdr_subs.h> 73#include <nfs/nfsm_subs.h> 74#include <nfs/nfsmount.h> 75#include <nfs/nqnfs.h> 76#include <nfs/nfsrtt.h> 77 78#include <miscfs/specfs/specdev.h> 79 80#include <netinet/in.h> 81#ifdef ISO 82#include <netiso/iso.h> 83#endif 84 85/* 86 * Data items converted to xdr at startup, since they are constant 87 * This is kinda hokey, but may save a little time doing byte swaps 88 */ 89u_long nfs_xdrneg1; 90u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 91 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 92 rpc_auth_kerb; 93u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 94 95/* And other global data */ 96static u_long nfs_xid = 0; 97static enum vtype nv2tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 99}; 100enum vtype nv3tov_type[8]= { 101 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 102}; 103 104int nfs_mount_type; 105int nfs_ticks; 106 107struct nfs_reqq nfs_reqq; 108struct nfssvc_sockhead nfssvc_sockhead; 109int nfssvc_sockhead_flag; 110struct nfsd_head nfsd_head; 111int nfsd_head_flag; 112struct nfs_bufq nfs_bufq; 113struct nqtimerhead nqtimerhead; 114struct nqfhhashhead *nqfhhashtbl; 115u_long nqfhhash; 116 117#ifndef NFS_NOSERVER 118/* 119 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 120 */ 121int nfsv3_procid[NFS_NPROCS] = { 122 NFSPROC_NULL, 123 NFSPROC_GETATTR, 124 NFSPROC_SETATTR, 125 NFSPROC_NOOP, 126 NFSPROC_LOOKUP, 127 NFSPROC_READLINK, 128 NFSPROC_READ, 129 NFSPROC_NOOP, 130 NFSPROC_WRITE, 131 NFSPROC_CREATE, 132 NFSPROC_REMOVE, 133 NFSPROC_RENAME, 134 NFSPROC_LINK, 135 NFSPROC_SYMLINK, 136 NFSPROC_MKDIR, 137 NFSPROC_RMDIR, 138 NFSPROC_READDIR, 139 NFSPROC_FSSTAT, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP 148}; 149 150#endif /* NFS_NOSERVER */ 151/* 152 * and the reverse mapping from generic to Version 2 procedure numbers 153 */ 154int nfsv2_procid[NFS_NPROCS] = { 155 NFSV2PROC_NULL, 156 NFSV2PROC_GETATTR, 157 NFSV2PROC_SETATTR, 158 NFSV2PROC_LOOKUP, 159 NFSV2PROC_NOOP, 160 NFSV2PROC_READLINK, 161 NFSV2PROC_READ, 162 NFSV2PROC_WRITE, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_MKDIR, 165 NFSV2PROC_SYMLINK, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_REMOVE, 168 NFSV2PROC_RMDIR, 169 NFSV2PROC_RENAME, 170 NFSV2PROC_LINK, 171 NFSV2PROC_READDIR, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_STATFS, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181}; 182 183#ifndef NFS_NOSERVER 184/* 185 * Maps errno values to nfs error numbers. 186 * Use NFSERR_IO as the catch all for ones not specifically defined in 187 * RFC 1094. 188 */ 189static u_char nfsrv_v2errmap[ELAST] = { 190 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 194 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 203 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, 207}; 208 209/* 210 * Maps errno values to nfs error numbers. 211 * Although it is not obvious whether or not NFS clients really care if 212 * a returned error value is in the specified list for the procedure, the 213 * safest thing to do is filter them appropriately. For Version 2, the 214 * X/Open XNFS document is the only specification that defines error values 215 * for each RPC (The RFC simply lists all possible error values for all RPCs), 216 * so I have decided to not do this for Version 2. 217 * The first entry is the default error return and the rest are the valid 218 * errors for that RPC in increasing numeric order. 219 */ 220static short nfsv3err_null[] = { 221 0, 222 0, 223}; 224 225static short nfsv3err_getattr[] = { 226 NFSERR_IO, 227 NFSERR_IO, 228 NFSERR_STALE, 229 NFSERR_BADHANDLE, 230 NFSERR_SERVERFAULT, 231 0, 232}; 233 234static short nfsv3err_setattr[] = { 235 NFSERR_IO, 236 NFSERR_PERM, 237 NFSERR_IO, 238 NFSERR_ACCES, 239 NFSERR_INVAL, 240 NFSERR_NOSPC, 241 NFSERR_ROFS, 242 NFSERR_DQUOT, 243 NFSERR_STALE, 244 NFSERR_BADHANDLE, 245 NFSERR_NOT_SYNC, 246 NFSERR_SERVERFAULT, 247 0, 248}; 249 250static short nfsv3err_lookup[] = { 251 NFSERR_IO, 252 NFSERR_NOENT, 253 NFSERR_IO, 254 NFSERR_ACCES, 255 NFSERR_NOTDIR, 256 NFSERR_NAMETOL, 257 NFSERR_STALE, 258 NFSERR_BADHANDLE, 259 NFSERR_SERVERFAULT, 260 0, 261}; 262 263static short nfsv3err_access[] = { 264 NFSERR_IO, 265 NFSERR_IO, 266 NFSERR_STALE, 267 NFSERR_BADHANDLE, 268 NFSERR_SERVERFAULT, 269 0, 270}; 271 272static short nfsv3err_readlink[] = { 273 NFSERR_IO, 274 NFSERR_IO, 275 NFSERR_ACCES, 276 NFSERR_INVAL, 277 NFSERR_STALE, 278 NFSERR_BADHANDLE, 279 NFSERR_NOTSUPP, 280 NFSERR_SERVERFAULT, 281 0, 282}; 283 284static short nfsv3err_read[] = { 285 NFSERR_IO, 286 NFSERR_IO, 287 NFSERR_NXIO, 288 NFSERR_ACCES, 289 NFSERR_INVAL, 290 NFSERR_STALE, 291 NFSERR_BADHANDLE, 292 NFSERR_SERVERFAULT, 293 0, 294}; 295 296static short nfsv3err_write[] = { 297 NFSERR_IO, 298 NFSERR_IO, 299 NFSERR_ACCES, 300 NFSERR_INVAL, 301 NFSERR_FBIG, 302 NFSERR_NOSPC, 303 NFSERR_ROFS, 304 NFSERR_DQUOT, 305 NFSERR_STALE, 306 NFSERR_BADHANDLE, 307 NFSERR_SERVERFAULT, 308 0, 309}; 310 311static short nfsv3err_create[] = { 312 NFSERR_IO, 313 NFSERR_IO, 314 NFSERR_ACCES, 315 NFSERR_EXIST, 316 NFSERR_NOTDIR, 317 NFSERR_NOSPC, 318 NFSERR_ROFS, 319 NFSERR_NAMETOL, 320 NFSERR_DQUOT, 321 NFSERR_STALE, 322 NFSERR_BADHANDLE, 323 NFSERR_NOTSUPP, 324 NFSERR_SERVERFAULT, 325 0, 326}; 327 328static short nfsv3err_mkdir[] = { 329 NFSERR_IO, 330 NFSERR_IO, 331 NFSERR_ACCES, 332 NFSERR_EXIST, 333 NFSERR_NOTDIR, 334 NFSERR_NOSPC, 335 NFSERR_ROFS, 336 NFSERR_NAMETOL, 337 NFSERR_DQUOT, 338 NFSERR_STALE, 339 NFSERR_BADHANDLE, 340 NFSERR_NOTSUPP, 341 NFSERR_SERVERFAULT, 342 0, 343}; 344 345static short nfsv3err_symlink[] = { 346 NFSERR_IO, 347 NFSERR_IO, 348 NFSERR_ACCES, 349 NFSERR_EXIST, 350 NFSERR_NOTDIR, 351 NFSERR_NOSPC, 352 NFSERR_ROFS, 353 NFSERR_NAMETOL, 354 NFSERR_DQUOT, 355 NFSERR_STALE, 356 NFSERR_BADHANDLE, 357 NFSERR_NOTSUPP, 358 NFSERR_SERVERFAULT, 359 0, 360}; 361 362static short nfsv3err_mknod[] = { 363 NFSERR_IO, 364 NFSERR_IO, 365 NFSERR_ACCES, 366 NFSERR_EXIST, 367 NFSERR_NOTDIR, 368 NFSERR_NOSPC, 369 NFSERR_ROFS, 370 NFSERR_NAMETOL, 371 NFSERR_DQUOT, 372 NFSERR_STALE, 373 NFSERR_BADHANDLE, 374 NFSERR_NOTSUPP, 375 NFSERR_SERVERFAULT, 376 NFSERR_BADTYPE, 377 0, 378}; 379 380static short nfsv3err_remove[] = { 381 NFSERR_IO, 382 NFSERR_NOENT, 383 NFSERR_IO, 384 NFSERR_ACCES, 385 NFSERR_NOTDIR, 386 NFSERR_ROFS, 387 NFSERR_NAMETOL, 388 NFSERR_STALE, 389 NFSERR_BADHANDLE, 390 NFSERR_SERVERFAULT, 391 0, 392}; 393 394static short nfsv3err_rmdir[] = { 395 NFSERR_IO, 396 NFSERR_NOENT, 397 NFSERR_IO, 398 NFSERR_ACCES, 399 NFSERR_EXIST, 400 NFSERR_NOTDIR, 401 NFSERR_INVAL, 402 NFSERR_ROFS, 403 NFSERR_NAMETOL, 404 NFSERR_NOTEMPTY, 405 NFSERR_STALE, 406 NFSERR_BADHANDLE, 407 NFSERR_NOTSUPP, 408 NFSERR_SERVERFAULT, 409 0, 410}; 411 412static short nfsv3err_rename[] = { 413 NFSERR_IO, 414 NFSERR_NOENT, 415 NFSERR_IO, 416 NFSERR_ACCES, 417 NFSERR_EXIST, 418 NFSERR_XDEV, 419 NFSERR_NOTDIR, 420 NFSERR_ISDIR, 421 NFSERR_INVAL, 422 NFSERR_NOSPC, 423 NFSERR_ROFS, 424 NFSERR_MLINK, 425 NFSERR_NAMETOL, 426 NFSERR_NOTEMPTY, 427 NFSERR_DQUOT, 428 NFSERR_STALE, 429 NFSERR_BADHANDLE, 430 NFSERR_NOTSUPP, 431 NFSERR_SERVERFAULT, 432 0, 433}; 434 435static short nfsv3err_link[] = { 436 NFSERR_IO, 437 NFSERR_IO, 438 NFSERR_ACCES, 439 NFSERR_EXIST, 440 NFSERR_XDEV, 441 NFSERR_NOTDIR, 442 NFSERR_INVAL, 443 NFSERR_NOSPC, 444 NFSERR_ROFS, 445 NFSERR_MLINK, 446 NFSERR_NAMETOL, 447 NFSERR_DQUOT, 448 NFSERR_STALE, 449 NFSERR_BADHANDLE, 450 NFSERR_NOTSUPP, 451 NFSERR_SERVERFAULT, 452 0, 453}; 454 455static short nfsv3err_readdir[] = { 456 NFSERR_IO, 457 NFSERR_IO, 458 NFSERR_ACCES, 459 NFSERR_NOTDIR, 460 NFSERR_STALE, 461 NFSERR_BADHANDLE, 462 NFSERR_BAD_COOKIE, 463 NFSERR_TOOSMALL, 464 NFSERR_SERVERFAULT, 465 0, 466}; 467 468static short nfsv3err_readdirplus[] = { 469 NFSERR_IO, 470 NFSERR_IO, 471 NFSERR_ACCES, 472 NFSERR_NOTDIR, 473 NFSERR_STALE, 474 NFSERR_BADHANDLE, 475 NFSERR_BAD_COOKIE, 476 NFSERR_NOTSUPP, 477 NFSERR_TOOSMALL, 478 NFSERR_SERVERFAULT, 479 0, 480}; 481 482static short nfsv3err_fsstat[] = { 483 NFSERR_IO, 484 NFSERR_IO, 485 NFSERR_STALE, 486 NFSERR_BADHANDLE, 487 NFSERR_SERVERFAULT, 488 0, 489}; 490 491static short nfsv3err_fsinfo[] = { 492 NFSERR_STALE, 493 NFSERR_STALE, 494 NFSERR_BADHANDLE, 495 NFSERR_SERVERFAULT, 496 0, 497}; 498 499static short nfsv3err_pathconf[] = { 500 NFSERR_STALE, 501 NFSERR_STALE, 502 NFSERR_BADHANDLE, 503 NFSERR_SERVERFAULT, 504 0, 505}; 506 507static short nfsv3err_commit[] = { 508 NFSERR_IO, 509 NFSERR_IO, 510 NFSERR_STALE, 511 NFSERR_BADHANDLE, 512 NFSERR_SERVERFAULT, 513 0, 514}; 515 516static short *nfsrv_v3errmap[] = { 517 nfsv3err_null, 518 nfsv3err_getattr, 519 nfsv3err_setattr, 520 nfsv3err_lookup, 521 nfsv3err_access, 522 nfsv3err_readlink, 523 nfsv3err_read, 524 nfsv3err_write, 525 nfsv3err_create, 526 nfsv3err_mkdir, 527 nfsv3err_symlink, 528 nfsv3err_mknod, 529 nfsv3err_remove, 530 nfsv3err_rmdir, 531 nfsv3err_rename, 532 nfsv3err_link, 533 nfsv3err_readdir, 534 nfsv3err_readdirplus, 535 nfsv3err_fsstat, 536 nfsv3err_fsinfo, 537 nfsv3err_pathconf, 538 nfsv3err_commit, 539}; 540 541#endif /* NFS_NOSERVER */ 542 543extern struct nfsrtt nfsrtt; 544extern time_t nqnfsstarttime; 545extern int nqsrv_clockskew; 546extern int nqsrv_writeslack; 547extern int nqsrv_maxlease; 548extern struct nfsstats nfsstats; 549extern int nqnfs_piggy[NFS_NPROCS]; 550extern nfstype nfsv2_type[9]; 551extern nfstype nfsv3_type[9]; 552extern struct nfsnodehashhead *nfsnodehashtbl; 553extern u_long nfsnodehash; 554 555#ifdef VFS_LKM 556struct getfh_args; 557extern int getfh(struct proc *, struct getfh_args *, int *); 558struct nfssvc_args; 559extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 560#endif 561 562LIST_HEAD(nfsnodehashhead, nfsnode); 563 564int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 565 566/* 567 * Create the header for an rpc request packet 568 * The hsiz is the size of the rest of the nfs request header. 569 * (just used to decide if a cluster is a good idea) 570 */ 571struct mbuf * 572nfsm_reqh(vp, procid, hsiz, bposp) 573 struct vnode *vp; 574 u_long procid; 575 int hsiz; 576 caddr_t *bposp; 577{ 578 register struct mbuf *mb; 579 register u_long *tl; 580 register caddr_t bpos; 581 struct mbuf *mb2; 582 struct nfsmount *nmp; 583 int nqflag; 584 585 MGET(mb, M_WAIT, MT_DATA); 586 if (hsiz >= MINCLSIZE) 587 MCLGET(mb, M_WAIT); 588 mb->m_len = 0; 589 bpos = mtod(mb, caddr_t); 590 591 /* 592 * For NQNFS, add lease request. 593 */ 594 if (vp) { 595 nmp = VFSTONFS(vp->v_mount); 596 if (nmp->nm_flag & NFSMNT_NQNFS) { 597 nqflag = NQNFS_NEEDLEASE(vp, procid); 598 if (nqflag) { 599 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 600 *tl++ = txdr_unsigned(nqflag); 601 *tl = txdr_unsigned(nmp->nm_leaseterm); 602 } else { 603 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 604 *tl = 0; 605 } 606 } 607 } 608 /* Finally, return values */ 609 *bposp = bpos; 610 return (mb); 611} 612 613/* 614 * Build the RPC header and fill in the authorization info. 615 * The authorization string argument is only used when the credentials 616 * come from outside of the kernel. 617 * Returns the head of the mbuf list. 618 */ 619struct mbuf * 620nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 621 verf_str, mrest, mrest_len, mbp, xidp) 622 register struct ucred *cr; 623 int nmflag; 624 int procid; 625 int auth_type; 626 int auth_len; 627 char *auth_str; 628 int verf_len; 629 char *verf_str; 630 struct mbuf *mrest; 631 int mrest_len; 632 struct mbuf **mbp; 633 u_long *xidp; 634{ 635 register struct mbuf *mb; 636 register u_long *tl; 637 register caddr_t bpos; 638 register int i; 639 struct mbuf *mreq, *mb2; 640 int siz, grpsiz, authsiz; 641 struct timeval tv; 642 static u_long base; 643 644 authsiz = nfsm_rndup(auth_len); 645 MGETHDR(mb, M_WAIT, MT_DATA); 646 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 647 MCLGET(mb, M_WAIT); 648 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 649 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 650 } else { 651 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 652 } 653 mb->m_len = 0; 654 mreq = mb; 655 bpos = mtod(mb, caddr_t); 656 657 /* 658 * First the RPC header. 659 */ 660 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 661 662 /* 663 * derive initial xid from system time 664 * XXX time is invalid if root not yet mounted 665 */ 666 if (!base && (rootvp)) { 667 microtime(&tv); 668 base = tv.tv_sec << 12; 669 nfs_xid = base; 670 } 671 /* 672 * Skip zero xid if it should ever happen. 673 */ 674 if (++nfs_xid == 0) 675 nfs_xid++; 676 677 *tl++ = *xidp = txdr_unsigned(nfs_xid); 678 *tl++ = rpc_call; 679 *tl++ = rpc_vers; 680 if (nmflag & NFSMNT_NQNFS) { 681 *tl++ = txdr_unsigned(NQNFS_PROG); 682 *tl++ = txdr_unsigned(NQNFS_VER3); 683 } else { 684 *tl++ = txdr_unsigned(NFS_PROG); 685 if (nmflag & NFSMNT_NFSV3) 686 *tl++ = txdr_unsigned(NFS_VER3); 687 else 688 *tl++ = txdr_unsigned(NFS_VER2); 689 } 690 if (nmflag & NFSMNT_NFSV3) 691 *tl++ = txdr_unsigned(procid); 692 else 693 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 694 695 /* 696 * And then the authorization cred. 697 */ 698 *tl++ = txdr_unsigned(auth_type); 699 *tl = txdr_unsigned(authsiz); 700 switch (auth_type) { 701 case RPCAUTH_UNIX: 702 nfsm_build(tl, u_long *, auth_len); 703 *tl++ = 0; /* stamp ?? */ 704 *tl++ = 0; /* NULL hostname */ 705 *tl++ = txdr_unsigned(cr->cr_uid); 706 *tl++ = txdr_unsigned(cr->cr_groups[0]); 707 grpsiz = (auth_len >> 2) - 5; 708 *tl++ = txdr_unsigned(grpsiz); 709 for (i = 1; i <= grpsiz; i++) 710 *tl++ = txdr_unsigned(cr->cr_groups[i]); 711 break; 712 case RPCAUTH_KERB4: 713 siz = auth_len; 714 while (siz > 0) { 715 if (M_TRAILINGSPACE(mb) == 0) { 716 MGET(mb2, M_WAIT, MT_DATA); 717 if (siz >= MINCLSIZE) 718 MCLGET(mb2, M_WAIT); 719 mb->m_next = mb2; 720 mb = mb2; 721 mb->m_len = 0; 722 bpos = mtod(mb, caddr_t); 723 } 724 i = min(siz, M_TRAILINGSPACE(mb)); 725 bcopy(auth_str, bpos, i); 726 mb->m_len += i; 727 auth_str += i; 728 bpos += i; 729 siz -= i; 730 } 731 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 732 for (i = 0; i < siz; i++) 733 *bpos++ = '\0'; 734 mb->m_len += siz; 735 } 736 break; 737 }; 738 739 /* 740 * And the verifier... 741 */ 742 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 743 if (verf_str) { 744 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 745 *tl = txdr_unsigned(verf_len); 746 siz = verf_len; 747 while (siz > 0) { 748 if (M_TRAILINGSPACE(mb) == 0) { 749 MGET(mb2, M_WAIT, MT_DATA); 750 if (siz >= MINCLSIZE) 751 MCLGET(mb2, M_WAIT); 752 mb->m_next = mb2; 753 mb = mb2; 754 mb->m_len = 0; 755 bpos = mtod(mb, caddr_t); 756 } 757 i = min(siz, M_TRAILINGSPACE(mb)); 758 bcopy(verf_str, bpos, i); 759 mb->m_len += i; 760 verf_str += i; 761 bpos += i; 762 siz -= i; 763 } 764 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 765 for (i = 0; i < siz; i++) 766 *bpos++ = '\0'; 767 mb->m_len += siz; 768 } 769 } else { 770 *tl++ = txdr_unsigned(RPCAUTH_NULL); 771 *tl = 0; 772 } 773 mb->m_next = mrest; 774 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 775 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 776 *mbp = mb; 777 return (mreq); 778} 779 780/* 781 * copies mbuf chain to the uio scatter/gather list 782 */ 783int 784nfsm_mbuftouio(mrep, uiop, siz, dpos) 785 struct mbuf **mrep; 786 register struct uio *uiop; 787 int siz; 788 caddr_t *dpos; 789{ 790 register char *mbufcp, *uiocp; 791 register int xfer, left, len; 792 register struct mbuf *mp; 793 long uiosiz, rem; 794 int error = 0; 795 796 mp = *mrep; 797 mbufcp = *dpos; 798 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 799 rem = nfsm_rndup(siz)-siz; 800 while (siz > 0) { 801 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 802 return (EFBIG); 803 left = uiop->uio_iov->iov_len; 804 uiocp = uiop->uio_iov->iov_base; 805 if (left > siz) 806 left = siz; 807 uiosiz = left; 808 while (left > 0) { 809 while (len == 0) { 810 mp = mp->m_next; 811 if (mp == NULL) 812 return (EBADRPC); 813 mbufcp = mtod(mp, caddr_t); 814 len = mp->m_len; 815 } 816 xfer = (left > len) ? len : left; 817#ifdef notdef 818 /* Not Yet.. */ 819 if (uiop->uio_iov->iov_op != NULL) 820 (*(uiop->uio_iov->iov_op)) 821 (mbufcp, uiocp, xfer); 822 else 823#endif 824 if (uiop->uio_segflg == UIO_SYSSPACE) 825 bcopy(mbufcp, uiocp, xfer); 826 else 827 copyout(mbufcp, uiocp, xfer); 828 left -= xfer; 829 len -= xfer; 830 mbufcp += xfer; 831 uiocp += xfer; 832 uiop->uio_offset += xfer; 833 uiop->uio_resid -= xfer; 834 } 835 if (uiop->uio_iov->iov_len <= siz) { 836 uiop->uio_iovcnt--; 837 uiop->uio_iov++; 838 } else { 839 uiop->uio_iov->iov_base += uiosiz; 840 uiop->uio_iov->iov_len -= uiosiz; 841 } 842 siz -= uiosiz; 843 } 844 *dpos = mbufcp; 845 *mrep = mp; 846 if (rem > 0) { 847 if (len < rem) 848 error = nfs_adv(mrep, dpos, rem, len); 849 else 850 *dpos += rem; 851 } 852 return (error); 853} 854 855/* 856 * copies a uio scatter/gather list to an mbuf chain. 857 * NOTE: can ony handle iovcnt == 1 858 */ 859int 860nfsm_uiotombuf(uiop, mq, siz, bpos) 861 register struct uio *uiop; 862 struct mbuf **mq; 863 int siz; 864 caddr_t *bpos; 865{ 866 register char *uiocp; 867 register struct mbuf *mp, *mp2; 868 register int xfer, left, mlen; 869 int uiosiz, clflg, rem; 870 char *cp; 871 872 if (uiop->uio_iovcnt != 1) 873 panic("nfsm_uiotombuf: iovcnt != 1"); 874 875 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 876 clflg = 1; 877 else 878 clflg = 0; 879 rem = nfsm_rndup(siz)-siz; 880 mp = mp2 = *mq; 881 while (siz > 0) { 882 left = uiop->uio_iov->iov_len; 883 uiocp = uiop->uio_iov->iov_base; 884 if (left > siz) 885 left = siz; 886 uiosiz = left; 887 while (left > 0) { 888 mlen = M_TRAILINGSPACE(mp); 889 if (mlen == 0) { 890 MGET(mp, M_WAIT, MT_DATA); 891 if (clflg) 892 MCLGET(mp, M_WAIT); 893 mp->m_len = 0; 894 mp2->m_next = mp; 895 mp2 = mp; 896 mlen = M_TRAILINGSPACE(mp); 897 } 898 xfer = (left > mlen) ? mlen : left; 899#ifdef notdef 900 /* Not Yet.. */ 901 if (uiop->uio_iov->iov_op != NULL) 902 (*(uiop->uio_iov->iov_op)) 903 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 904 else 905#endif 906 if (uiop->uio_segflg == UIO_SYSSPACE) 907 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 908 else 909 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 910 mp->m_len += xfer; 911 left -= xfer; 912 uiocp += xfer; 913 uiop->uio_offset += xfer; 914 uiop->uio_resid -= xfer; 915 } 916 uiop->uio_iov->iov_base += uiosiz; 917 uiop->uio_iov->iov_len -= uiosiz; 918 siz -= uiosiz; 919 } 920 if (rem > 0) { 921 if (rem > M_TRAILINGSPACE(mp)) { 922 MGET(mp, M_WAIT, MT_DATA); 923 mp->m_len = 0; 924 mp2->m_next = mp; 925 } 926 cp = mtod(mp, caddr_t)+mp->m_len; 927 for (left = 0; left < rem; left++) 928 *cp++ = '\0'; 929 mp->m_len += rem; 930 *bpos = cp; 931 } else 932 *bpos = mtod(mp, caddr_t)+mp->m_len; 933 *mq = mp; 934 return (0); 935} 936 937/* 938 * Help break down an mbuf chain by setting the first siz bytes contiguous 939 * pointed to by returned val. 940 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 941 * cases. (The macros use the vars. dpos and dpos2) 942 */ 943int 944nfsm_disct(mdp, dposp, siz, left, cp2) 945 struct mbuf **mdp; 946 caddr_t *dposp; 947 int siz; 948 int left; 949 caddr_t *cp2; 950{ 951 register struct mbuf *mp, *mp2; 952 register int siz2, xfer; 953 register caddr_t p; 954 955 mp = *mdp; 956 while (left == 0) { 957 *mdp = mp = mp->m_next; 958 if (mp == NULL) 959 return (EBADRPC); 960 left = mp->m_len; 961 *dposp = mtod(mp, caddr_t); 962 } 963 if (left >= siz) { 964 *cp2 = *dposp; 965 *dposp += siz; 966 } else if (mp->m_next == NULL) { 967 return (EBADRPC); 968 } else if (siz > MHLEN) { 969 panic("nfs S too big"); 970 } else { 971 MGET(mp2, M_WAIT, MT_DATA); 972 mp2->m_next = mp->m_next; 973 mp->m_next = mp2; 974 mp->m_len -= left; 975 mp = mp2; 976 *cp2 = p = mtod(mp, caddr_t); 977 bcopy(*dposp, p, left); /* Copy what was left */ 978 siz2 = siz-left; 979 p += left; 980 mp2 = mp->m_next; 981 /* Loop around copying up the siz2 bytes */ 982 while (siz2 > 0) { 983 if (mp2 == NULL) 984 return (EBADRPC); 985 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 986 if (xfer > 0) { 987 bcopy(mtod(mp2, caddr_t), p, xfer); 988 NFSMADV(mp2, xfer); 989 mp2->m_len -= xfer; 990 p += xfer; 991 siz2 -= xfer; 992 } 993 if (siz2 > 0) 994 mp2 = mp2->m_next; 995 } 996 mp->m_len = siz; 997 *mdp = mp2; 998 *dposp = mtod(mp2, caddr_t); 999 } 1000 return (0); 1001} 1002 1003/* 1004 * Advance the position in the mbuf chain. 1005 */ 1006int 1007nfs_adv(mdp, dposp, offs, left) 1008 struct mbuf **mdp; 1009 caddr_t *dposp; 1010 int offs; 1011 int left; 1012{ 1013 register struct mbuf *m; 1014 register int s; 1015 1016 m = *mdp; 1017 s = left; 1018 while (s < offs) { 1019 offs -= s; 1020 m = m->m_next; 1021 if (m == NULL) 1022 return (EBADRPC); 1023 s = m->m_len; 1024 } 1025 *mdp = m; 1026 *dposp = mtod(m, caddr_t)+offs; 1027 return (0); 1028} 1029 1030/* 1031 * Copy a string into mbufs for the hard cases... 1032 */ 1033int 1034nfsm_strtmbuf(mb, bpos, cp, siz) 1035 struct mbuf **mb; 1036 char **bpos; 1037 char *cp; 1038 long siz; 1039{ 1040 register struct mbuf *m1 = 0, *m2; 1041 long left, xfer, len, tlen; 1042 u_long *tl; 1043 int putsize; 1044 1045 putsize = 1; 1046 m2 = *mb; 1047 left = M_TRAILINGSPACE(m2); 1048 if (left > 0) { 1049 tl = ((u_long *)(*bpos)); 1050 *tl++ = txdr_unsigned(siz); 1051 putsize = 0; 1052 left -= NFSX_UNSIGNED; 1053 m2->m_len += NFSX_UNSIGNED; 1054 if (left > 0) { 1055 bcopy(cp, (caddr_t) tl, left); 1056 siz -= left; 1057 cp += left; 1058 m2->m_len += left; 1059 left = 0; 1060 } 1061 } 1062 /* Loop around adding mbufs */ 1063 while (siz > 0) { 1064 MGET(m1, M_WAIT, MT_DATA); 1065 if (siz > MLEN) 1066 MCLGET(m1, M_WAIT); 1067 m1->m_len = NFSMSIZ(m1); 1068 m2->m_next = m1; 1069 m2 = m1; 1070 tl = mtod(m1, u_long *); 1071 tlen = 0; 1072 if (putsize) { 1073 *tl++ = txdr_unsigned(siz); 1074 m1->m_len -= NFSX_UNSIGNED; 1075 tlen = NFSX_UNSIGNED; 1076 putsize = 0; 1077 } 1078 if (siz < m1->m_len) { 1079 len = nfsm_rndup(siz); 1080 xfer = siz; 1081 if (xfer < len) 1082 *(tl+(xfer>>2)) = 0; 1083 } else { 1084 xfer = len = m1->m_len; 1085 } 1086 bcopy(cp, (caddr_t) tl, xfer); 1087 m1->m_len = len+tlen; 1088 siz -= xfer; 1089 cp += xfer; 1090 } 1091 *mb = m1; 1092 *bpos = mtod(m1, caddr_t)+m1->m_len; 1093 return (0); 1094} 1095 1096/* 1097 * Called once to initialize data structures... 1098 */ 1099int 1100nfs_init(vfsp) 1101 struct vfsconf *vfsp; 1102{ 1103 register int i; 1104 1105 /* 1106 * Check to see if major data structures haven't bloated. 1107 */ 1108 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1109 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1110 printf("Try reducing NFS_SMALLFH\n"); 1111 } 1112 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1113 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1114 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1115 } 1116 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1117 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1118 printf("Try reducing NFS_UIDHASHSIZ\n"); 1119 } 1120 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1121 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1122 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1123 } 1124 nfs_mount_type = vfsp->vfc_typenum; 1125 nfsrtt.pos = 0; 1126 rpc_vers = txdr_unsigned(RPC_VER2); 1127 rpc_call = txdr_unsigned(RPC_CALL); 1128 rpc_reply = txdr_unsigned(RPC_REPLY); 1129 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1130 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1131 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1132 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1133 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1134 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1135 nfs_prog = txdr_unsigned(NFS_PROG); 1136 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1137 nfs_true = txdr_unsigned(TRUE); 1138 nfs_false = txdr_unsigned(FALSE); 1139 nfs_xdrneg1 = txdr_unsigned(-1); 1140 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1141 if (nfs_ticks < 1) 1142 nfs_ticks = 1; 1143 /* Ensure async daemons disabled */ 1144 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1145 nfs_iodwant[i] = (struct proc *)0; 1146 nfs_iodmount[i] = (struct nfsmount *)0; 1147 } 1148 nfs_nhinit(); /* Init the nfsnode table */ 1149#ifndef NFS_NOSERVER 1150 nfsrv_init(0); /* Init server data structures */ 1151 nfsrv_initcache(); /* Init the server request cache */ 1152#endif 1153 1154 /* 1155 * Initialize the nqnfs server stuff. 1156 */ 1157 if (nqnfsstarttime == 0) { 1158 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1159 + nqsrv_clockskew + nqsrv_writeslack; 1160 NQLOADNOVRAM(nqnfsstarttime); 1161 CIRCLEQ_INIT(&nqtimerhead); 1162 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1163 } 1164 1165 /* 1166 * Initialize reply list and start timer 1167 */ 1168 TAILQ_INIT(&nfs_reqq); 1169 1170 nfs_timer(0); 1171 1172 1173#ifdef __FreeBSD__ 1174 /* 1175 * Set up lease_check and lease_updatetime so that other parts 1176 * of the system can call us, if we are loadable. 1177 */ 1178#ifndef NFS_NOSERVER 1179 lease_check_hook = nqnfs_vop_lease_check; 1180#endif 1181 lease_updatetime = nfs_lease_updatetime; 1182 vfsp->vfc_refcount++; /* make us non-unloadable */ 1183#ifdef VFS_LKM 1184 sysent[SYS_nfssvc].sy_narg = 2; 1185 sysent[SYS_nfssvc].sy_call = nfssvc; 1186#ifndef NFS_NOSERVER 1187 sysent[SYS_getfh].sy_narg = 2; 1188 sysent[SYS_getfh].sy_call = getfh; 1189#endif 1190#endif 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 struct proc *p = curproc; 1231 1232 md = *mdp; 1233 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1234 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1235 return (error); 1236 fp = (struct nfs_fattr *)cp2; 1237 if (v3) { 1238 vtyp = nfsv3tov_type(fp->fa_type); 1239 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1240 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1241 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1242 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1243 } else { 1244 vtyp = nfsv2tov_type(fp->fa_type); 1245 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1246 /* 1247 * XXX 1248 * 1249 * The duplicate information returned in fa_type and fa_mode 1250 * is an ambiguity in the NFS version 2 protocol. 1251 * 1252 * VREG should be taken literally as a regular file. If a 1253 * server intents to return some type information differently 1254 * in the upper bits of the mode field (e.g. for sockets, or 1255 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1256 * leave the examination of the mode bits even in the VREG 1257 * case to avoid breakage for bogus servers, but we make sure 1258 * that there are actually type bits set in the upper part of 1259 * fa_mode (and failing that, trust the va_type field). 1260 * 1261 * NFSv3 cleared the issue, and requires fa_mode to not 1262 * contain any type information (while also introduing sockets 1263 * and FIFOs for fa_type). 1264 */ 1265 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1266 vtyp = IFTOVT(vmode); 1267 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1268 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1269 1270 /* 1271 * Really ugly NFSv2 kludge. 1272 */ 1273 if (vtyp == VCHR && rdev == 0xffffffff) 1274 vtyp = VFIFO; 1275 } 1276 1277 /* 1278 * If v_type == VNON it is a new node, so fill in the v_type, 1279 * n_mtime fields. Check to see if it represents a special 1280 * device, and if so, check for a possible alias. Once the 1281 * correct vnode has been obtained, fill in the rest of the 1282 * information. 1283 */ 1284 np = VTONFS(vp); 1285 if (vp->v_type != vtyp) { 1286 vp->v_type = vtyp; 1287 if (vp->v_type == VFIFO) { 1288 vp->v_op = fifo_nfsv2nodeop_p; 1289 } 1290 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1291 vp->v_op = spec_nfsv2nodeop_p; 1292 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1293 if (nvp) { 1294 /* 1295 * Discard unneeded vnode, but save its nfsnode. 1296 * Since the nfsnode does not have a lock, its 1297 * vnode lock has to be carried over. 1298 */ 1299 nvp->v_vnlock = vp->v_vnlock; 1300 vp->v_vnlock = NULL; 1301 nvp->v_data = vp->v_data; 1302 vp->v_data = NULL; 1303 vp->v_op = spec_vnodeop_p; 1304 vrele(vp); 1305 vgone(vp); 1306 /* 1307 * Reinitialize aliased node. 1308 */ 1309 np->n_vnode = nvp; 1310 *vpp = vp = nvp; 1311 } 1312 } 1313 np->n_mtime = mtime.tv_sec; 1314 } 1315 vap = &np->n_vattr; 1316 vap->va_type = vtyp; 1317 vap->va_mode = (vmode & 07777); 1318 vap->va_rdev = (dev_t)rdev; 1319 vap->va_mtime = mtime; 1320 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1321 if (v3) { 1322 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1323 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1324 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1325 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1326 vap->va_blocksize = NFS_FABLKSIZE; 1327 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1328 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1329 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1330 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1331 vap->va_flags = 0; 1332 vap->va_filerev = 0; 1333 } else { 1334 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1335 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1336 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1337 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1338 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1339 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1340 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1341 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1342 vap->va_flags = 0; 1343 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1344 vap->va_ctime.tv_nsec = 0; 1345 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1346 vap->va_filerev = 0; 1347 } 1348 if (vap->va_size != np->n_size) { 1349 if (vap->va_type == VREG) { 1350 if (np->n_flag & NMODIFIED) { 1351 if (vap->va_size < np->n_size) 1352 vap->va_size = np->n_size; 1353 else 1354 np->n_size = vap->va_size; 1355 } else 1356 np->n_size = vap->va_size; 1357 vnode_pager_setsize(vp, (u_long)np->n_size); 1358 } else 1359 np->n_size = vap->va_size; 1360 } 1361 np->n_attrstamp = time.tv_sec; 1362 if (vaper != NULL) { 1363 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1364 if (np->n_flag & NCHG) { 1365 if (np->n_flag & NACC) 1366 vaper->va_atime = np->n_atim; 1367 if (np->n_flag & NUPD) 1368 vaper->va_mtime = np->n_mtim; 1369 } 1370 } 1371 return (0); 1372} 1373 1374/* 1375 * Check the time stamp 1376 * If the cache is valid, copy contents to *vap and return 0 1377 * otherwise return an error 1378 */ 1379int 1380nfs_getattrcache(vp, vaper) 1381 register struct vnode *vp; 1382 struct vattr *vaper; 1383{ 1384 register struct nfsnode *np = VTONFS(vp); 1385 register struct vattr *vap; 1386 1387 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1388 nfsstats.attrcache_misses++; 1389 return (ENOENT); 1390 } 1391 nfsstats.attrcache_hits++; 1392 vap = &np->n_vattr; 1393 if (vap->va_size != np->n_size) { 1394 if (vap->va_type == VREG) { 1395 if (np->n_flag & NMODIFIED) { 1396 if (vap->va_size < np->n_size) 1397 vap->va_size = np->n_size; 1398 else 1399 np->n_size = vap->va_size; 1400 } else 1401 np->n_size = vap->va_size; 1402 vnode_pager_setsize(vp, (u_long)np->n_size); 1403 } else 1404 np->n_size = vap->va_size; 1405 } 1406 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1407 if (np->n_flag & NCHG) { 1408 if (np->n_flag & NACC) 1409 vaper->va_atime = np->n_atim; 1410 if (np->n_flag & NUPD) 1411 vaper->va_mtime = np->n_mtim; 1412 } 1413 return (0); 1414} 1415 1416#ifndef NFS_NOSERVER 1417/* 1418 * Set up nameidata for a lookup() call and do it. 1419 * 1420 * If pubflag is set, this call is done for a lookup operation on the 1421 * public filehandle. In that case we allow crossing mountpoints and 1422 * absolute pathnames. However, the caller is expected to check that 1423 * the lookup result is within the public fs, and deny access if 1424 * it is not. 1425 */ 1426int 1427nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1428 register struct nameidata *ndp; 1429 fhandle_t *fhp; 1430 int len; 1431 struct nfssvc_sock *slp; 1432 struct mbuf *nam; 1433 struct mbuf **mdp; 1434 caddr_t *dposp; 1435 struct vnode **retdirp; 1436 struct proc *p; 1437 int kerbflag, pubflag; 1438{ 1439 register int i, rem; 1440 register struct mbuf *md; 1441 register char *fromcp, *tocp, *cp; 1442 struct iovec aiov; 1443 struct uio auio; 1444 struct vnode *dp; 1445 int error, rdonly, linklen; 1446 struct componentname *cnp = &ndp->ni_cnd; 1447 1448 *retdirp = (struct vnode *)0; 1449 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 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)) 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 if (pubflag) { 1505 /* 1506 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1507 * and the 'native path' indicator. 1508 */ 1509 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1510 fromcp = cnp->cn_pnbuf; 1511 tocp = cp; 1512 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1513 switch ((unsigned char)*fromcp) { 1514 case WEBNFS_NATIVE_CHAR: 1515 /* 1516 * 'Native' path for us is the same 1517 * as a path according to the NFS spec, 1518 * just skip the escape char. 1519 */ 1520 fromcp++; 1521 break; 1522 /* 1523 * More may be added in the future, range 0x80-0xff 1524 */ 1525 default: 1526 error = EIO; 1527 FREE(cp, M_NAMEI); 1528 goto out; 1529 } 1530 } 1531 /* 1532 * Translate the '%' escapes, URL-style. 1533 */ 1534 while (*fromcp != '\0') { 1535 if (*fromcp == WEBNFS_ESC_CHAR) { 1536 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1537 fromcp++; 1538 *tocp++ = HEXSTRTOI(fromcp); 1539 fromcp += 2; 1540 continue; 1541 } else { 1542 error = ENOENT; 1543 FREE(cp, M_NAMEI); 1544 goto out; 1545 } 1546 } else 1547 *tocp++ = *fromcp++; 1548 } 1549 *tocp = '\0'; 1550 FREE(cnp->cn_pnbuf, M_NAMEI); 1551 cnp->cn_pnbuf = cp; 1552 } 1553 1554 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1555 ndp->ni_segflg = UIO_SYSSPACE; 1556 1557 if (pubflag) { 1558 ndp->ni_rootdir = rootvnode; 1559 ndp->ni_loopcnt = 0; 1560 if (cnp->cn_pnbuf[0] == '/') 1561 dp = rootvnode; 1562 } else { 1563 cnp->cn_flags |= NOCROSSMOUNT; 1564 } 1565 1566 cnp->cn_proc = p; 1567 VREF(dp); 1568 1569 for (;;) { 1570 cnp->cn_nameptr = cnp->cn_pnbuf; 1571 ndp->ni_startdir = dp; 1572 /* 1573 * And call lookup() to do the real work 1574 */ 1575 cnp->cn_proc = p; 1576 if (error = lookup(ndp)) 1577 break; 1578 /* 1579 * Check for encountering a symbolic link 1580 */ 1581 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1582 nfsrv_object_create(ndp->ni_vp); 1583 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1584 cnp->cn_flags |= HASBUF; 1585 return (0); 1586 } 1587 break; 1588 } else { 1589 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1590 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1591 if (!pubflag) { 1592 vrele(ndp->ni_dvp); 1593 vput(ndp->ni_vp); 1594 ndp->ni_vp = NULL; 1595 error = EINVAL; 1596 break; 1597 } 1598 1599 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1600 error = ELOOP; 1601 break; 1602 } 1603 if (ndp->ni_pathlen > 0) 1604 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1605 else 1606 cp = cnp->cn_pnbuf; 1607 aiov.iov_base = cp; 1608 aiov.iov_len = MAXPATHLEN; 1609 auio.uio_iov = &aiov; 1610 auio.uio_iovcnt = 1; 1611 auio.uio_offset = 0; 1612 auio.uio_rw = UIO_READ; 1613 auio.uio_segflg = UIO_SYSSPACE; 1614 auio.uio_procp = (struct proc *)0; 1615 auio.uio_resid = MAXPATHLEN; 1616 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1617 if (error) { 1618 badlink: 1619 if (ndp->ni_pathlen > 1) 1620 FREE(cp, M_NAMEI); 1621 break; 1622 } 1623 linklen = MAXPATHLEN - auio.uio_resid; 1624 if (linklen == 0) { 1625 error = ENOENT; 1626 goto badlink; 1627 } 1628 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1629 error = ENAMETOOLONG; 1630 goto badlink; 1631 } 1632 if (ndp->ni_pathlen > 1) { 1633 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1634 FREE(cnp->cn_pnbuf, M_NAMEI); 1635 cnp->cn_pnbuf = cp; 1636 } else 1637 cnp->cn_pnbuf[linklen] = '\0'; 1638 ndp->ni_pathlen += linklen; 1639 vput(ndp->ni_vp); 1640 dp = ndp->ni_dvp; 1641 /* 1642 * Check if root directory should replace current directory. 1643 */ 1644 if (cnp->cn_pnbuf[0] == '/') { 1645 vrele(dp); 1646 dp = ndp->ni_rootdir; 1647 VREF(dp); 1648 } 1649 } 1650 } 1651out: 1652 FREE(cnp->cn_pnbuf, M_NAMEI); 1653 return (error); 1654} 1655 1656/* 1657 * A fiddled version of m_adj() that ensures null fill to a long 1658 * boundary and only trims off the back end 1659 */ 1660void 1661nfsm_adj(mp, len, nul) 1662 struct mbuf *mp; 1663 register int len; 1664 int nul; 1665{ 1666 register struct mbuf *m; 1667 register int count, i; 1668 register char *cp; 1669 1670 /* 1671 * Trim from tail. Scan the mbuf chain, 1672 * calculating its length and finding the last mbuf. 1673 * If the adjustment only affects this mbuf, then just 1674 * adjust and return. Otherwise, rescan and truncate 1675 * after the remaining size. 1676 */ 1677 count = 0; 1678 m = mp; 1679 for (;;) { 1680 count += m->m_len; 1681 if (m->m_next == (struct mbuf *)0) 1682 break; 1683 m = m->m_next; 1684 } 1685 if (m->m_len > len) { 1686 m->m_len -= len; 1687 if (nul > 0) { 1688 cp = mtod(m, caddr_t)+m->m_len-nul; 1689 for (i = 0; i < nul; i++) 1690 *cp++ = '\0'; 1691 } 1692 return; 1693 } 1694 count -= len; 1695 if (count < 0) 1696 count = 0; 1697 /* 1698 * Correct length for chain is "count". 1699 * Find the mbuf with last data, adjust its length, 1700 * and toss data from remaining mbufs on chain. 1701 */ 1702 for (m = mp; m; m = m->m_next) { 1703 if (m->m_len >= count) { 1704 m->m_len = count; 1705 if (nul > 0) { 1706 cp = mtod(m, caddr_t)+m->m_len-nul; 1707 for (i = 0; i < nul; i++) 1708 *cp++ = '\0'; 1709 } 1710 break; 1711 } 1712 count -= m->m_len; 1713 } 1714 for (m = m->m_next;m;m = m->m_next) 1715 m->m_len = 0; 1716} 1717 1718/* 1719 * Make these functions instead of macros, so that the kernel text size 1720 * doesn't get too big... 1721 */ 1722void 1723nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1724 struct nfsrv_descript *nfsd; 1725 int before_ret; 1726 register struct vattr *before_vap; 1727 int after_ret; 1728 struct vattr *after_vap; 1729 struct mbuf **mbp; 1730 char **bposp; 1731{ 1732 register struct mbuf *mb = *mbp, *mb2; 1733 register char *bpos = *bposp; 1734 register u_long *tl; 1735 1736 if (before_ret) { 1737 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1738 *tl = nfs_false; 1739 } else { 1740 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1741 *tl++ = nfs_true; 1742 txdr_hyper(&(before_vap->va_size), tl); 1743 tl += 2; 1744 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1745 tl += 2; 1746 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1747 } 1748 *bposp = bpos; 1749 *mbp = mb; 1750 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1751} 1752 1753void 1754nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1755 struct nfsrv_descript *nfsd; 1756 int after_ret; 1757 struct vattr *after_vap; 1758 struct mbuf **mbp; 1759 char **bposp; 1760{ 1761 register struct mbuf *mb = *mbp, *mb2; 1762 register char *bpos = *bposp; 1763 register u_long *tl; 1764 register struct nfs_fattr *fp; 1765 1766 if (after_ret) { 1767 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1768 *tl = nfs_false; 1769 } else { 1770 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1771 *tl++ = nfs_true; 1772 fp = (struct nfs_fattr *)tl; 1773 nfsm_srvfattr(nfsd, after_vap, fp); 1774 } 1775 *mbp = mb; 1776 *bposp = bpos; 1777} 1778 1779void 1780nfsm_srvfattr(nfsd, vap, fp) 1781 register struct nfsrv_descript *nfsd; 1782 register struct vattr *vap; 1783 register struct nfs_fattr *fp; 1784{ 1785 1786 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1787 fp->fa_uid = txdr_unsigned(vap->va_uid); 1788 fp->fa_gid = txdr_unsigned(vap->va_gid); 1789 if (nfsd->nd_flag & ND_NFSV3) { 1790 fp->fa_type = vtonfsv3_type(vap->va_type); 1791 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1792 txdr_hyper(&vap->va_size, &fp->fa3_size); 1793 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1794 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1795 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1796 fp->fa3_fsid.nfsuquad[0] = 0; 1797 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1798 fp->fa3_fileid.nfsuquad[0] = 0; 1799 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1800 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1801 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1802 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1803 } else { 1804 fp->fa_type = vtonfsv2_type(vap->va_type); 1805 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1806 fp->fa2_size = txdr_unsigned(vap->va_size); 1807 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1808 if (vap->va_type == VFIFO) 1809 fp->fa2_rdev = 0xffffffff; 1810 else 1811 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1812 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1813 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1814 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1815 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1816 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1817 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1818 } 1819} 1820 1821/* 1822 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1823 * - look up fsid in mount list (if not found ret error) 1824 * - get vp and export rights by calling VFS_FHTOVP() 1825 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1826 * - if not lockflag unlock it with VOP_UNLOCK() 1827 */ 1828int 1829nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1830 fhandle_t *fhp; 1831 int lockflag; 1832 struct vnode **vpp; 1833 struct ucred *cred; 1834 struct nfssvc_sock *slp; 1835 struct mbuf *nam; 1836 int *rdonlyp; 1837 int kerbflag; 1838 int pubflag; 1839{ 1840 struct proc *p = curproc; /* XXX */ 1841 register struct mount *mp; 1842 register int i; 1843 struct ucred *credanon; 1844 int error, exflags; 1845 1846 *vpp = (struct vnode *)0; 1847 1848 if (nfs_ispublicfh(fhp)) { 1849 if (!pubflag || !nfs_pub.np_valid) 1850 return (ESTALE); 1851 fhp = &nfs_pub.np_handle; 1852 } 1853 1854 mp = vfs_getvfs(&fhp->fh_fsid); 1855 if (!mp) 1856 return (ESTALE); 1857 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1858 if (error) 1859 return (error); 1860 /* 1861 * Check/setup credentials. 1862 */ 1863 if (exflags & MNT_EXKERB) { 1864 if (!kerbflag) { 1865 vput(*vpp); 1866 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1867 } 1868 } else if (kerbflag) { 1869 vput(*vpp); 1870 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1871 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1872 cred->cr_uid = credanon->cr_uid; 1873 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1874 cred->cr_groups[i] = credanon->cr_groups[i]; 1875 cred->cr_ngroups = i; 1876 } 1877 if (exflags & MNT_EXRDONLY) 1878 *rdonlyp = 1; 1879 else 1880 *rdonlyp = 0; 1881 1882 nfsrv_object_create(*vpp); 1883 1884 if (!lockflag) 1885 VOP_UNLOCK(*vpp, 0, p); 1886 return (0); 1887} 1888 1889 1890/* 1891 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1892 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1893 * transformed this to all zeroes in both cases, so check for it. 1894 */ 1895int 1896nfs_ispublicfh(fhp) 1897 fhandle_t *fhp; 1898{ 1899 char *cp = (char *)fhp; 1900 int i; 1901 1902 for (i = 0; i < NFSX_V3FH; i++) 1903 if (*cp++ != 0) 1904 return (FALSE); 1905 return (TRUE); 1906} 1907 1908#endif /* NFS_NOSERVER */ 1909/* 1910 * This function compares two net addresses by family and returns TRUE 1911 * if they are the same host. 1912 * If there is any doubt, return FALSE. 1913 * The AF_INET family is handled as a special case so that address mbufs 1914 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1915 */ 1916int 1917netaddr_match(family, haddr, nam) 1918 int family; 1919 union nethostaddr *haddr; 1920 struct mbuf *nam; 1921{ 1922 register struct sockaddr_in *inetaddr; 1923 1924 switch (family) { 1925 case AF_INET: 1926 inetaddr = mtod(nam, struct sockaddr_in *); 1927 if (inetaddr->sin_family == AF_INET && 1928 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1929 return (1); 1930 break; 1931#ifdef ISO 1932 case AF_ISO: 1933 { 1934 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1935 1936 isoaddr1 = mtod(nam, struct sockaddr_iso *); 1937 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 1938 if (isoaddr1->siso_family == AF_ISO && 1939 isoaddr1->siso_nlen > 0 && 1940 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1941 SAME_ISOADDR(isoaddr1, isoaddr2)) 1942 return (1); 1943 break; 1944 } 1945#endif /* ISO */ 1946 default: 1947 break; 1948 }; 1949 return (0); 1950} 1951 1952static nfsuint64 nfs_nullcookie = { 0, 0 }; 1953/* 1954 * This function finds the directory cookie that corresponds to the 1955 * logical byte offset given. 1956 */ 1957nfsuint64 * 1958nfs_getcookie(np, off, add) 1959 register struct nfsnode *np; 1960 off_t off; 1961 int add; 1962{ 1963 register struct nfsdmap *dp, *dp2; 1964 register int pos; 1965 1966 pos = off / NFS_DIRBLKSIZ; 1967 if (pos == 0) { 1968#ifdef DIAGNOSTIC 1969 if (add) 1970 panic("nfs getcookie add at 0"); 1971#endif 1972 return (&nfs_nullcookie); 1973 } 1974 pos--; 1975 dp = np->n_cookies.lh_first; 1976 if (!dp) { 1977 if (add) { 1978 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1979 M_NFSDIROFF, M_WAITOK); 1980 dp->ndm_eocookie = 0; 1981 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1982 } else 1983 return ((nfsuint64 *)0); 1984 } 1985 while (pos >= NFSNUMCOOKIES) { 1986 pos -= NFSNUMCOOKIES; 1987 if (dp->ndm_list.le_next) { 1988 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1989 pos >= dp->ndm_eocookie) 1990 return ((nfsuint64 *)0); 1991 dp = dp->ndm_list.le_next; 1992 } else if (add) { 1993 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1994 M_NFSDIROFF, M_WAITOK); 1995 dp2->ndm_eocookie = 0; 1996 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1997 dp = dp2; 1998 } else 1999 return ((nfsuint64 *)0); 2000 } 2001 if (pos >= dp->ndm_eocookie) { 2002 if (add) 2003 dp->ndm_eocookie = pos + 1; 2004 else 2005 return ((nfsuint64 *)0); 2006 } 2007 return (&dp->ndm_cookies[pos]); 2008} 2009 2010/* 2011 * Invalidate cached directory information, except for the actual directory 2012 * blocks (which are invalidated separately). 2013 * Done mainly to avoid the use of stale offset cookies. 2014 */ 2015void 2016nfs_invaldir(vp) 2017 register struct vnode *vp; 2018{ 2019 register struct nfsnode *np = VTONFS(vp); 2020 2021#ifdef DIAGNOSTIC 2022 if (vp->v_type != VDIR) 2023 panic("nfs: invaldir not dir"); 2024#endif 2025 np->n_direofoffset = 0; 2026 np->n_cookieverf.nfsuquad[0] = 0; 2027 np->n_cookieverf.nfsuquad[1] = 0; 2028 if (np->n_cookies.lh_first) 2029 np->n_cookies.lh_first->ndm_eocookie = 0; 2030} 2031 2032/* 2033 * The write verifier has changed (probably due to a server reboot), so all 2034 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2035 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2036 * flag. Once done the new write verifier can be set for the mount point. 2037 */ 2038void 2039nfs_clearcommit(mp) 2040 struct mount *mp; 2041{ 2042 register struct vnode *vp, *nvp; 2043 register struct buf *bp, *nbp; 2044 int s; 2045 2046 s = splbio(); 2047loop: 2048 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2049 if (vp->v_mount != mp) /* Paranoia */ 2050 goto loop; 2051 nvp = vp->v_mntvnodes.le_next; 2052 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2053 nbp = bp->b_vnbufs.le_next; 2054 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2055 == (B_DELWRI | B_NEEDCOMMIT)) 2056 bp->b_flags &= ~B_NEEDCOMMIT; 2057 } 2058 } 2059 splx(s); 2060} 2061 2062#ifndef NFS_NOSERVER 2063/* 2064 * Map errnos to NFS error numbers. For Version 3 also filter out error 2065 * numbers not specified for the associated procedure. 2066 */ 2067int 2068nfsrv_errmap(nd, err) 2069 struct nfsrv_descript *nd; 2070 register int err; 2071{ 2072 register short *defaulterrp, *errp; 2073 2074 if (nd->nd_flag & ND_NFSV3) { 2075 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2076 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2077 while (*++errp) { 2078 if (*errp == err) 2079 return (err); 2080 else if (*errp > err) 2081 break; 2082 } 2083 return ((int)*defaulterrp); 2084 } else 2085 return (err & 0xffff); 2086 } 2087 if (err <= ELAST) 2088 return ((int)nfsrv_v2errmap[err - 1]); 2089 return (NFSERR_IO); 2090} 2091 2092int 2093nfsrv_object_create(struct vnode *vp) { 2094 2095 if ((vp == NULL) || (vp->v_type != VREG)) 2096 return 1; 2097 return vfs_object_create(vp, curproc, curproc?curproc->p_ucred:NULL, 1); 2098} 2099#endif /* NFS_NOSERVER */ 2100 2101