nfs_srvsubs.c revision 35066
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 1.52 1998/03/30 09:54:12 phk 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 static u_long base; 646 647 authsiz = nfsm_rndup(auth_len); 648 MGETHDR(mb, M_WAIT, MT_DATA); 649 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 650 MCLGET(mb, M_WAIT); 651 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 652 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 653 } else { 654 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 655 } 656 mb->m_len = 0; 657 mreq = mb; 658 bpos = mtod(mb, caddr_t); 659 660 /* 661 * First the RPC header. 662 */ 663 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 664 665 /* Get a pretty random xid to start with */ 666 if (!nfs_xid) 667 nfs_xid = random(); 668 /* 669 * Skip zero xid if it should ever happen. 670 */ 671 if (++nfs_xid == 0) 672 nfs_xid++; 673 674 *tl++ = *xidp = txdr_unsigned(nfs_xid); 675 *tl++ = rpc_call; 676 *tl++ = rpc_vers; 677 if (nmflag & NFSMNT_NQNFS) { 678 *tl++ = txdr_unsigned(NQNFS_PROG); 679 *tl++ = txdr_unsigned(NQNFS_VER3); 680 } else { 681 *tl++ = txdr_unsigned(NFS_PROG); 682 if (nmflag & NFSMNT_NFSV3) 683 *tl++ = txdr_unsigned(NFS_VER3); 684 else 685 *tl++ = txdr_unsigned(NFS_VER2); 686 } 687 if (nmflag & NFSMNT_NFSV3) 688 *tl++ = txdr_unsigned(procid); 689 else 690 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 691 692 /* 693 * And then the authorization cred. 694 */ 695 *tl++ = txdr_unsigned(auth_type); 696 *tl = txdr_unsigned(authsiz); 697 switch (auth_type) { 698 case RPCAUTH_UNIX: 699 nfsm_build(tl, u_long *, auth_len); 700 *tl++ = 0; /* stamp ?? */ 701 *tl++ = 0; /* NULL hostname */ 702 *tl++ = txdr_unsigned(cr->cr_uid); 703 *tl++ = txdr_unsigned(cr->cr_groups[0]); 704 grpsiz = (auth_len >> 2) - 5; 705 *tl++ = txdr_unsigned(grpsiz); 706 for (i = 1; i <= grpsiz; i++) 707 *tl++ = txdr_unsigned(cr->cr_groups[i]); 708 break; 709 case RPCAUTH_KERB4: 710 siz = auth_len; 711 while (siz > 0) { 712 if (M_TRAILINGSPACE(mb) == 0) { 713 MGET(mb2, M_WAIT, MT_DATA); 714 if (siz >= MINCLSIZE) 715 MCLGET(mb2, M_WAIT); 716 mb->m_next = mb2; 717 mb = mb2; 718 mb->m_len = 0; 719 bpos = mtod(mb, caddr_t); 720 } 721 i = min(siz, M_TRAILINGSPACE(mb)); 722 bcopy(auth_str, bpos, i); 723 mb->m_len += i; 724 auth_str += i; 725 bpos += i; 726 siz -= i; 727 } 728 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 729 for (i = 0; i < siz; i++) 730 *bpos++ = '\0'; 731 mb->m_len += siz; 732 } 733 break; 734 }; 735 736 /* 737 * And the verifier... 738 */ 739 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 740 if (verf_str) { 741 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 742 *tl = txdr_unsigned(verf_len); 743 siz = verf_len; 744 while (siz > 0) { 745 if (M_TRAILINGSPACE(mb) == 0) { 746 MGET(mb2, M_WAIT, MT_DATA); 747 if (siz >= MINCLSIZE) 748 MCLGET(mb2, M_WAIT); 749 mb->m_next = mb2; 750 mb = mb2; 751 mb->m_len = 0; 752 bpos = mtod(mb, caddr_t); 753 } 754 i = min(siz, M_TRAILINGSPACE(mb)); 755 bcopy(verf_str, bpos, i); 756 mb->m_len += i; 757 verf_str += i; 758 bpos += i; 759 siz -= i; 760 } 761 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 762 for (i = 0; i < siz; i++) 763 *bpos++ = '\0'; 764 mb->m_len += siz; 765 } 766 } else { 767 *tl++ = txdr_unsigned(RPCAUTH_NULL); 768 *tl = 0; 769 } 770 mb->m_next = mrest; 771 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 772 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 773 *mbp = mb; 774 return (mreq); 775} 776 777/* 778 * copies mbuf chain to the uio scatter/gather list 779 */ 780int 781nfsm_mbuftouio(mrep, uiop, siz, dpos) 782 struct mbuf **mrep; 783 register struct uio *uiop; 784 int siz; 785 caddr_t *dpos; 786{ 787 register char *mbufcp, *uiocp; 788 register int xfer, left, len; 789 register struct mbuf *mp; 790 long uiosiz, rem; 791 int error = 0; 792 793 mp = *mrep; 794 mbufcp = *dpos; 795 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 796 rem = nfsm_rndup(siz)-siz; 797 while (siz > 0) { 798 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 799 return (EFBIG); 800 left = uiop->uio_iov->iov_len; 801 uiocp = uiop->uio_iov->iov_base; 802 if (left > siz) 803 left = siz; 804 uiosiz = left; 805 while (left > 0) { 806 while (len == 0) { 807 mp = mp->m_next; 808 if (mp == NULL) 809 return (EBADRPC); 810 mbufcp = mtod(mp, caddr_t); 811 len = mp->m_len; 812 } 813 xfer = (left > len) ? len : left; 814#ifdef notdef 815 /* Not Yet.. */ 816 if (uiop->uio_iov->iov_op != NULL) 817 (*(uiop->uio_iov->iov_op)) 818 (mbufcp, uiocp, xfer); 819 else 820#endif 821 if (uiop->uio_segflg == UIO_SYSSPACE) 822 bcopy(mbufcp, uiocp, xfer); 823 else 824 copyout(mbufcp, uiocp, xfer); 825 left -= xfer; 826 len -= xfer; 827 mbufcp += xfer; 828 uiocp += xfer; 829 uiop->uio_offset += xfer; 830 uiop->uio_resid -= xfer; 831 } 832 if (uiop->uio_iov->iov_len <= siz) { 833 uiop->uio_iovcnt--; 834 uiop->uio_iov++; 835 } else { 836 uiop->uio_iov->iov_base += uiosiz; 837 uiop->uio_iov->iov_len -= uiosiz; 838 } 839 siz -= uiosiz; 840 } 841 *dpos = mbufcp; 842 *mrep = mp; 843 if (rem > 0) { 844 if (len < rem) 845 error = nfs_adv(mrep, dpos, rem, len); 846 else 847 *dpos += rem; 848 } 849 return (error); 850} 851 852/* 853 * copies a uio scatter/gather list to an mbuf chain. 854 * NOTE: can ony handle iovcnt == 1 855 */ 856int 857nfsm_uiotombuf(uiop, mq, siz, bpos) 858 register struct uio *uiop; 859 struct mbuf **mq; 860 int siz; 861 caddr_t *bpos; 862{ 863 register char *uiocp; 864 register struct mbuf *mp, *mp2; 865 register int xfer, left, mlen; 866 int uiosiz, clflg, rem; 867 char *cp; 868 869 if (uiop->uio_iovcnt != 1) 870 panic("nfsm_uiotombuf: iovcnt != 1"); 871 872 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 873 clflg = 1; 874 else 875 clflg = 0; 876 rem = nfsm_rndup(siz)-siz; 877 mp = mp2 = *mq; 878 while (siz > 0) { 879 left = uiop->uio_iov->iov_len; 880 uiocp = uiop->uio_iov->iov_base; 881 if (left > siz) 882 left = siz; 883 uiosiz = left; 884 while (left > 0) { 885 mlen = M_TRAILINGSPACE(mp); 886 if (mlen == 0) { 887 MGET(mp, M_WAIT, MT_DATA); 888 if (clflg) 889 MCLGET(mp, M_WAIT); 890 mp->m_len = 0; 891 mp2->m_next = mp; 892 mp2 = mp; 893 mlen = M_TRAILINGSPACE(mp); 894 } 895 xfer = (left > mlen) ? mlen : left; 896#ifdef notdef 897 /* Not Yet.. */ 898 if (uiop->uio_iov->iov_op != NULL) 899 (*(uiop->uio_iov->iov_op)) 900 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 901 else 902#endif 903 if (uiop->uio_segflg == UIO_SYSSPACE) 904 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 905 else 906 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 907 mp->m_len += xfer; 908 left -= xfer; 909 uiocp += xfer; 910 uiop->uio_offset += xfer; 911 uiop->uio_resid -= xfer; 912 } 913 uiop->uio_iov->iov_base += uiosiz; 914 uiop->uio_iov->iov_len -= uiosiz; 915 siz -= uiosiz; 916 } 917 if (rem > 0) { 918 if (rem > M_TRAILINGSPACE(mp)) { 919 MGET(mp, M_WAIT, MT_DATA); 920 mp->m_len = 0; 921 mp2->m_next = mp; 922 } 923 cp = mtod(mp, caddr_t)+mp->m_len; 924 for (left = 0; left < rem; left++) 925 *cp++ = '\0'; 926 mp->m_len += rem; 927 *bpos = cp; 928 } else 929 *bpos = mtod(mp, caddr_t)+mp->m_len; 930 *mq = mp; 931 return (0); 932} 933 934/* 935 * Help break down an mbuf chain by setting the first siz bytes contiguous 936 * pointed to by returned val. 937 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 938 * cases. (The macros use the vars. dpos and dpos2) 939 */ 940int 941nfsm_disct(mdp, dposp, siz, left, cp2) 942 struct mbuf **mdp; 943 caddr_t *dposp; 944 int siz; 945 int left; 946 caddr_t *cp2; 947{ 948 register struct mbuf *mp, *mp2; 949 register int siz2, xfer; 950 register caddr_t p; 951 952 mp = *mdp; 953 while (left == 0) { 954 *mdp = mp = mp->m_next; 955 if (mp == NULL) 956 return (EBADRPC); 957 left = mp->m_len; 958 *dposp = mtod(mp, caddr_t); 959 } 960 if (left >= siz) { 961 *cp2 = *dposp; 962 *dposp += siz; 963 } else if (mp->m_next == NULL) { 964 return (EBADRPC); 965 } else if (siz > MHLEN) { 966 panic("nfs S too big"); 967 } else { 968 MGET(mp2, M_WAIT, MT_DATA); 969 mp2->m_next = mp->m_next; 970 mp->m_next = mp2; 971 mp->m_len -= left; 972 mp = mp2; 973 *cp2 = p = mtod(mp, caddr_t); 974 bcopy(*dposp, p, left); /* Copy what was left */ 975 siz2 = siz-left; 976 p += left; 977 mp2 = mp->m_next; 978 /* Loop around copying up the siz2 bytes */ 979 while (siz2 > 0) { 980 if (mp2 == NULL) 981 return (EBADRPC); 982 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 983 if (xfer > 0) { 984 bcopy(mtod(mp2, caddr_t), p, xfer); 985 NFSMADV(mp2, xfer); 986 mp2->m_len -= xfer; 987 p += xfer; 988 siz2 -= xfer; 989 } 990 if (siz2 > 0) 991 mp2 = mp2->m_next; 992 } 993 mp->m_len = siz; 994 *mdp = mp2; 995 *dposp = mtod(mp2, caddr_t); 996 } 997 return (0); 998} 999 1000/* 1001 * Advance the position in the mbuf chain. 1002 */ 1003int 1004nfs_adv(mdp, dposp, offs, left) 1005 struct mbuf **mdp; 1006 caddr_t *dposp; 1007 int offs; 1008 int left; 1009{ 1010 register struct mbuf *m; 1011 register int s; 1012 1013 m = *mdp; 1014 s = left; 1015 while (s < offs) { 1016 offs -= s; 1017 m = m->m_next; 1018 if (m == NULL) 1019 return (EBADRPC); 1020 s = m->m_len; 1021 } 1022 *mdp = m; 1023 *dposp = mtod(m, caddr_t)+offs; 1024 return (0); 1025} 1026 1027/* 1028 * Copy a string into mbufs for the hard cases... 1029 */ 1030int 1031nfsm_strtmbuf(mb, bpos, cp, siz) 1032 struct mbuf **mb; 1033 char **bpos; 1034 char *cp; 1035 long siz; 1036{ 1037 register struct mbuf *m1 = 0, *m2; 1038 long left, xfer, len, tlen; 1039 u_long *tl; 1040 int putsize; 1041 1042 putsize = 1; 1043 m2 = *mb; 1044 left = M_TRAILINGSPACE(m2); 1045 if (left > 0) { 1046 tl = ((u_long *)(*bpos)); 1047 *tl++ = txdr_unsigned(siz); 1048 putsize = 0; 1049 left -= NFSX_UNSIGNED; 1050 m2->m_len += NFSX_UNSIGNED; 1051 if (left > 0) { 1052 bcopy(cp, (caddr_t) tl, left); 1053 siz -= left; 1054 cp += left; 1055 m2->m_len += left; 1056 left = 0; 1057 } 1058 } 1059 /* Loop around adding mbufs */ 1060 while (siz > 0) { 1061 MGET(m1, M_WAIT, MT_DATA); 1062 if (siz > MLEN) 1063 MCLGET(m1, M_WAIT); 1064 m1->m_len = NFSMSIZ(m1); 1065 m2->m_next = m1; 1066 m2 = m1; 1067 tl = mtod(m1, u_long *); 1068 tlen = 0; 1069 if (putsize) { 1070 *tl++ = txdr_unsigned(siz); 1071 m1->m_len -= NFSX_UNSIGNED; 1072 tlen = NFSX_UNSIGNED; 1073 putsize = 0; 1074 } 1075 if (siz < m1->m_len) { 1076 len = nfsm_rndup(siz); 1077 xfer = siz; 1078 if (xfer < len) 1079 *(tl+(xfer>>2)) = 0; 1080 } else { 1081 xfer = len = m1->m_len; 1082 } 1083 bcopy(cp, (caddr_t) tl, xfer); 1084 m1->m_len = len+tlen; 1085 siz -= xfer; 1086 cp += xfer; 1087 } 1088 *mb = m1; 1089 *bpos = mtod(m1, caddr_t)+m1->m_len; 1090 return (0); 1091} 1092 1093/* 1094 * Called once to initialize data structures... 1095 */ 1096int 1097nfs_init(vfsp) 1098 struct vfsconf *vfsp; 1099{ 1100 register int i; 1101 1102 /* 1103 * Check to see if major data structures haven't bloated. 1104 */ 1105 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1106 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1107 printf("Try reducing NFS_SMALLFH\n"); 1108 } 1109 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1110 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1111 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1112 } 1113 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1114 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1115 printf("Try reducing NFS_UIDHASHSIZ\n"); 1116 } 1117 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1118 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1119 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1120 } 1121 nfs_mount_type = vfsp->vfc_typenum; 1122 nfsrtt.pos = 0; 1123 rpc_vers = txdr_unsigned(RPC_VER2); 1124 rpc_call = txdr_unsigned(RPC_CALL); 1125 rpc_reply = txdr_unsigned(RPC_REPLY); 1126 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1127 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1128 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1129 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1130 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1131 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1132 nfs_prog = txdr_unsigned(NFS_PROG); 1133 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1134 nfs_true = txdr_unsigned(TRUE); 1135 nfs_false = txdr_unsigned(FALSE); 1136 nfs_xdrneg1 = txdr_unsigned(-1); 1137 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1138 if (nfs_ticks < 1) 1139 nfs_ticks = 1; 1140 /* Ensure async daemons disabled */ 1141 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1142 nfs_iodwant[i] = (struct proc *)0; 1143 nfs_iodmount[i] = (struct nfsmount *)0; 1144 } 1145 nfs_nhinit(); /* Init the nfsnode table */ 1146#ifndef NFS_NOSERVER 1147 nfsrv_init(0); /* Init server data structures */ 1148 nfsrv_initcache(); /* Init the server request cache */ 1149#endif 1150 1151 /* 1152 * Initialize the nqnfs server stuff. 1153 */ 1154 if (nqnfsstarttime == 0) { 1155 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1156 + nqsrv_clockskew + nqsrv_writeslack; 1157 NQLOADNOVRAM(nqnfsstarttime); 1158 CIRCLEQ_INIT(&nqtimerhead); 1159 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1160 } 1161 1162 /* 1163 * Initialize reply list and start timer 1164 */ 1165 TAILQ_INIT(&nfs_reqq); 1166 1167 nfs_timer(0); 1168 1169 1170 /* 1171 * Set up lease_check and lease_updatetime so that other parts 1172 * of the system can call us, if we are loadable. 1173 */ 1174#ifndef NFS_NOSERVER 1175 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1176#endif 1177 lease_updatetime = nfs_lease_updatetime; 1178 vfsp->vfc_refcount++; /* make us non-unloadable */ 1179 sysent[SYS_nfssvc].sy_narg = 2; 1180 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1181#ifndef NFS_NOSERVER 1182 sysent[SYS_getfh].sy_narg = 2; 1183 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1184#endif 1185 1186 return (0); 1187} 1188 1189/* 1190 * Attribute cache routines. 1191 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1192 * that are on the mbuf list 1193 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1194 * error otherwise 1195 */ 1196 1197/* 1198 * Load the attribute cache (that lives in the nfsnode entry) with 1199 * the values on the mbuf list and 1200 * Iff vap not NULL 1201 * copy the attributes to *vaper 1202 */ 1203int 1204nfs_loadattrcache(vpp, mdp, dposp, vaper) 1205 struct vnode **vpp; 1206 struct mbuf **mdp; 1207 caddr_t *dposp; 1208 struct vattr *vaper; 1209{ 1210 register struct vnode *vp = *vpp; 1211 register struct vattr *vap; 1212 register struct nfs_fattr *fp; 1213 register struct nfsnode *np; 1214 register long t1; 1215 caddr_t cp2; 1216 int error = 0, rdev; 1217 struct mbuf *md; 1218 enum vtype vtyp; 1219 u_short vmode; 1220 struct timespec mtime; 1221 struct vnode *nvp; 1222 int v3 = NFS_ISV3(vp); 1223 1224 md = *mdp; 1225 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1226 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1227 return (error); 1228 fp = (struct nfs_fattr *)cp2; 1229 if (v3) { 1230 vtyp = nfsv3tov_type(fp->fa_type); 1231 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1232 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1233 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1234 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1235 } else { 1236 vtyp = nfsv2tov_type(fp->fa_type); 1237 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1238 /* 1239 * XXX 1240 * 1241 * The duplicate information returned in fa_type and fa_mode 1242 * is an ambiguity in the NFS version 2 protocol. 1243 * 1244 * VREG should be taken literally as a regular file. If a 1245 * server intents to return some type information differently 1246 * in the upper bits of the mode field (e.g. for sockets, or 1247 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1248 * leave the examination of the mode bits even in the VREG 1249 * case to avoid breakage for bogus servers, but we make sure 1250 * that there are actually type bits set in the upper part of 1251 * fa_mode (and failing that, trust the va_type field). 1252 * 1253 * NFSv3 cleared the issue, and requires fa_mode to not 1254 * contain any type information (while also introduing sockets 1255 * and FIFOs for fa_type). 1256 */ 1257 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1258 vtyp = IFTOVT(vmode); 1259 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1260 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1261 1262 /* 1263 * Really ugly NFSv2 kludge. 1264 */ 1265 if (vtyp == VCHR && rdev == 0xffffffff) 1266 vtyp = VFIFO; 1267 } 1268 1269 /* 1270 * If v_type == VNON it is a new node, so fill in the v_type, 1271 * n_mtime fields. Check to see if it represents a special 1272 * device, and if so, check for a possible alias. Once the 1273 * correct vnode has been obtained, fill in the rest of the 1274 * information. 1275 */ 1276 np = VTONFS(vp); 1277 if (vp->v_type != vtyp) { 1278 vp->v_type = vtyp; 1279 if (vp->v_type == VFIFO) { 1280 vp->v_op = fifo_nfsv2nodeop_p; 1281 } 1282 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1283 vp->v_op = spec_nfsv2nodeop_p; 1284 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1285 if (nvp) { 1286 /* 1287 * Discard unneeded vnode, but save its nfsnode. 1288 * Since the nfsnode does not have a lock, its 1289 * vnode lock has to be carried over. 1290 */ 1291 nvp->v_vnlock = vp->v_vnlock; 1292 vp->v_vnlock = NULL; 1293 nvp->v_data = vp->v_data; 1294 vp->v_data = NULL; 1295 vp->v_op = spec_vnodeop_p; 1296 vrele(vp); 1297 vgone(vp); 1298 /* 1299 * Reinitialize aliased node. 1300 */ 1301 np->n_vnode = nvp; 1302 *vpp = vp = nvp; 1303 } 1304 } 1305 np->n_mtime = mtime.tv_sec; 1306 } 1307 vap = &np->n_vattr; 1308 vap->va_type = vtyp; 1309 vap->va_mode = (vmode & 07777); 1310 vap->va_rdev = (dev_t)rdev; 1311 vap->va_mtime = mtime; 1312 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1313 if (v3) { 1314 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1315 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1316 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1317 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1318 vap->va_blocksize = NFS_FABLKSIZE; 1319 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1320 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1321 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1322 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1323 vap->va_flags = 0; 1324 vap->va_filerev = 0; 1325 } else { 1326 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1327 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1328 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1329 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1330 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1331 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1332 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1333 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1334 vap->va_flags = 0; 1335 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1336 vap->va_ctime.tv_nsec = 0; 1337 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1338 vap->va_filerev = 0; 1339 } 1340 if (vap->va_size != np->n_size) { 1341 if (vap->va_type == VREG) { 1342 if (np->n_flag & NMODIFIED) { 1343 if (vap->va_size < np->n_size) 1344 vap->va_size = np->n_size; 1345 else 1346 np->n_size = vap->va_size; 1347 } else 1348 np->n_size = vap->va_size; 1349 vnode_pager_setsize(vp, (u_long)np->n_size); 1350 } else 1351 np->n_size = vap->va_size; 1352 } 1353 np->n_attrstamp = time_second; 1354 if (vaper != NULL) { 1355 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1356 if (np->n_flag & NCHG) { 1357 if (np->n_flag & NACC) 1358 vaper->va_atime = np->n_atim; 1359 if (np->n_flag & NUPD) 1360 vaper->va_mtime = np->n_mtim; 1361 } 1362 } 1363 return (0); 1364} 1365 1366/* 1367 * Check the time stamp 1368 * If the cache is valid, copy contents to *vap and return 0 1369 * otherwise return an error 1370 */ 1371int 1372nfs_getattrcache(vp, vaper) 1373 register struct vnode *vp; 1374 struct vattr *vaper; 1375{ 1376 register struct nfsnode *np = VTONFS(vp); 1377 register struct vattr *vap; 1378 1379 if ((time_second - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1380 nfsstats.attrcache_misses++; 1381 return (ENOENT); 1382 } 1383 nfsstats.attrcache_hits++; 1384 vap = &np->n_vattr; 1385 if (vap->va_size != np->n_size) { 1386 if (vap->va_type == VREG) { 1387 if (np->n_flag & NMODIFIED) { 1388 if (vap->va_size < np->n_size) 1389 vap->va_size = np->n_size; 1390 else 1391 np->n_size = vap->va_size; 1392 } else 1393 np->n_size = vap->va_size; 1394 vnode_pager_setsize(vp, (u_long)np->n_size); 1395 } else 1396 np->n_size = vap->va_size; 1397 } 1398 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1399 if (np->n_flag & NCHG) { 1400 if (np->n_flag & NACC) 1401 vaper->va_atime = np->n_atim; 1402 if (np->n_flag & NUPD) 1403 vaper->va_mtime = np->n_mtim; 1404 } 1405 return (0); 1406} 1407 1408#ifndef NFS_NOSERVER 1409/* 1410 * Set up nameidata for a lookup() call and do it. 1411 * 1412 * If pubflag is set, this call is done for a lookup operation on the 1413 * public filehandle. In that case we allow crossing mountpoints and 1414 * absolute pathnames. However, the caller is expected to check that 1415 * the lookup result is within the public fs, and deny access if 1416 * it is not. 1417 */ 1418int 1419nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1420 register struct nameidata *ndp; 1421 fhandle_t *fhp; 1422 int len; 1423 struct nfssvc_sock *slp; 1424 struct sockaddr *nam; 1425 struct mbuf **mdp; 1426 caddr_t *dposp; 1427 struct vnode **retdirp; 1428 struct proc *p; 1429 int kerbflag, pubflag; 1430{ 1431 register int i, rem; 1432 register struct mbuf *md; 1433 register char *fromcp, *tocp, *cp; 1434 struct iovec aiov; 1435 struct uio auio; 1436 struct vnode *dp; 1437 int error, rdonly, linklen; 1438 struct componentname *cnp = &ndp->ni_cnd; 1439 1440 *retdirp = (struct vnode *)0; 1441 cnp->cn_pnbuf = zalloc(namei_zone); 1442 1443 /* 1444 * Copy the name from the mbuf list to ndp->ni_pnbuf 1445 * and set the various ndp fields appropriately. 1446 */ 1447 fromcp = *dposp; 1448 tocp = cnp->cn_pnbuf; 1449 md = *mdp; 1450 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1451 cnp->cn_hash = 0; 1452 for (i = 0; i < len; i++) { 1453 while (rem == 0) { 1454 md = md->m_next; 1455 if (md == NULL) { 1456 error = EBADRPC; 1457 goto out; 1458 } 1459 fromcp = mtod(md, caddr_t); 1460 rem = md->m_len; 1461 } 1462 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1463 error = EACCES; 1464 goto out; 1465 } 1466 cnp->cn_hash += (unsigned char)*fromcp; 1467 *tocp++ = *fromcp++; 1468 rem--; 1469 } 1470 *tocp = '\0'; 1471 *mdp = md; 1472 *dposp = fromcp; 1473 len = nfsm_rndup(len)-len; 1474 if (len > 0) { 1475 if (rem >= len) 1476 *dposp += len; 1477 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1478 goto out; 1479 } 1480 1481 /* 1482 * Extract and set starting directory. 1483 */ 1484 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1485 nam, &rdonly, kerbflag, pubflag); 1486 if (error) 1487 goto out; 1488 if (dp->v_type != VDIR) { 1489 vrele(dp); 1490 error = ENOTDIR; 1491 goto out; 1492 } 1493 1494 if (rdonly) 1495 cnp->cn_flags |= RDONLY; 1496 1497 *retdirp = dp; 1498 1499 if (pubflag) { 1500 /* 1501 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1502 * and the 'native path' indicator. 1503 */ 1504 cp = zalloc(namei_zone); 1505 fromcp = cnp->cn_pnbuf; 1506 tocp = cp; 1507 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1508 switch ((unsigned char)*fromcp) { 1509 case WEBNFS_NATIVE_CHAR: 1510 /* 1511 * 'Native' path for us is the same 1512 * as a path according to the NFS spec, 1513 * just skip the escape char. 1514 */ 1515 fromcp++; 1516 break; 1517 /* 1518 * More may be added in the future, range 0x80-0xff 1519 */ 1520 default: 1521 error = EIO; 1522 zfree(namei_zone, cp); 1523 goto out; 1524 } 1525 } 1526 /* 1527 * Translate the '%' escapes, URL-style. 1528 */ 1529 while (*fromcp != '\0') { 1530 if (*fromcp == WEBNFS_ESC_CHAR) { 1531 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1532 fromcp++; 1533 *tocp++ = HEXSTRTOI(fromcp); 1534 fromcp += 2; 1535 continue; 1536 } else { 1537 error = ENOENT; 1538 zfree(namei_zone, cp); 1539 goto out; 1540 } 1541 } else 1542 *tocp++ = *fromcp++; 1543 } 1544 *tocp = '\0'; 1545 zfree(namei_zone, cnp->cn_pnbuf); 1546 cnp->cn_pnbuf = cp; 1547 } 1548 1549 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1550 ndp->ni_segflg = UIO_SYSSPACE; 1551 1552 if (pubflag) { 1553 ndp->ni_rootdir = rootvnode; 1554 ndp->ni_loopcnt = 0; 1555 if (cnp->cn_pnbuf[0] == '/') 1556 dp = rootvnode; 1557 } else { 1558 cnp->cn_flags |= NOCROSSMOUNT; 1559 } 1560 1561 cnp->cn_proc = p; 1562 VREF(dp); 1563 1564 for (;;) { 1565 cnp->cn_nameptr = cnp->cn_pnbuf; 1566 ndp->ni_startdir = dp; 1567 /* 1568 * And call lookup() to do the real work 1569 */ 1570 error = lookup(ndp); 1571 if (error) 1572 break; 1573 /* 1574 * Check for encountering a symbolic link 1575 */ 1576 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1577 nfsrv_object_create(ndp->ni_vp); 1578 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1579 cnp->cn_flags |= HASBUF; 1580 return (0); 1581 } 1582 break; 1583 } else { 1584 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1585 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1586 if (!pubflag) { 1587 vrele(ndp->ni_dvp); 1588 vput(ndp->ni_vp); 1589 ndp->ni_vp = NULL; 1590 error = EINVAL; 1591 break; 1592 } 1593 1594 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1595 error = ELOOP; 1596 break; 1597 } 1598 if (ndp->ni_pathlen > 1) 1599 cp = zalloc(namei_zone); 1600 else 1601 cp = cnp->cn_pnbuf; 1602 aiov.iov_base = cp; 1603 aiov.iov_len = MAXPATHLEN; 1604 auio.uio_iov = &aiov; 1605 auio.uio_iovcnt = 1; 1606 auio.uio_offset = 0; 1607 auio.uio_rw = UIO_READ; 1608 auio.uio_segflg = UIO_SYSSPACE; 1609 auio.uio_procp = (struct proc *)0; 1610 auio.uio_resid = MAXPATHLEN; 1611 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1612 if (error) { 1613 badlink: 1614 if (ndp->ni_pathlen > 1) 1615 zfree(namei_zone, cp); 1616 break; 1617 } 1618 linklen = MAXPATHLEN - auio.uio_resid; 1619 if (linklen == 0) { 1620 error = ENOENT; 1621 goto badlink; 1622 } 1623 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1624 error = ENAMETOOLONG; 1625 goto badlink; 1626 } 1627 if (ndp->ni_pathlen > 1) { 1628 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1629 zfree(namei_zone, cnp->cn_pnbuf); 1630 cnp->cn_pnbuf = cp; 1631 } else 1632 cnp->cn_pnbuf[linklen] = '\0'; 1633 ndp->ni_pathlen += linklen; 1634 vput(ndp->ni_vp); 1635 dp = ndp->ni_dvp; 1636 /* 1637 * Check if root directory should replace current directory. 1638 */ 1639 if (cnp->cn_pnbuf[0] == '/') { 1640 vrele(dp); 1641 dp = ndp->ni_rootdir; 1642 VREF(dp); 1643 } 1644 } 1645 } 1646out: 1647 zfree(namei_zone, cnp->cn_pnbuf); 1648 return (error); 1649} 1650 1651/* 1652 * A fiddled version of m_adj() that ensures null fill to a long 1653 * boundary and only trims off the back end 1654 */ 1655void 1656nfsm_adj(mp, len, nul) 1657 struct mbuf *mp; 1658 register int len; 1659 int nul; 1660{ 1661 register struct mbuf *m; 1662 register int count, i; 1663 register char *cp; 1664 1665 /* 1666 * Trim from tail. Scan the mbuf chain, 1667 * calculating its length and finding the last mbuf. 1668 * If the adjustment only affects this mbuf, then just 1669 * adjust and return. Otherwise, rescan and truncate 1670 * after the remaining size. 1671 */ 1672 count = 0; 1673 m = mp; 1674 for (;;) { 1675 count += m->m_len; 1676 if (m->m_next == (struct mbuf *)0) 1677 break; 1678 m = m->m_next; 1679 } 1680 if (m->m_len > len) { 1681 m->m_len -= len; 1682 if (nul > 0) { 1683 cp = mtod(m, caddr_t)+m->m_len-nul; 1684 for (i = 0; i < nul; i++) 1685 *cp++ = '\0'; 1686 } 1687 return; 1688 } 1689 count -= len; 1690 if (count < 0) 1691 count = 0; 1692 /* 1693 * Correct length for chain is "count". 1694 * Find the mbuf with last data, adjust its length, 1695 * and toss data from remaining mbufs on chain. 1696 */ 1697 for (m = mp; m; m = m->m_next) { 1698 if (m->m_len >= count) { 1699 m->m_len = count; 1700 if (nul > 0) { 1701 cp = mtod(m, caddr_t)+m->m_len-nul; 1702 for (i = 0; i < nul; i++) 1703 *cp++ = '\0'; 1704 } 1705 break; 1706 } 1707 count -= m->m_len; 1708 } 1709 for (m = m->m_next;m;m = m->m_next) 1710 m->m_len = 0; 1711} 1712 1713/* 1714 * Make these functions instead of macros, so that the kernel text size 1715 * doesn't get too big... 1716 */ 1717void 1718nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1719 struct nfsrv_descript *nfsd; 1720 int before_ret; 1721 register struct vattr *before_vap; 1722 int after_ret; 1723 struct vattr *after_vap; 1724 struct mbuf **mbp; 1725 char **bposp; 1726{ 1727 register struct mbuf *mb = *mbp, *mb2; 1728 register char *bpos = *bposp; 1729 register u_long *tl; 1730 1731 if (before_ret) { 1732 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1733 *tl = nfs_false; 1734 } else { 1735 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1736 *tl++ = nfs_true; 1737 txdr_hyper(&(before_vap->va_size), tl); 1738 tl += 2; 1739 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1740 tl += 2; 1741 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1742 } 1743 *bposp = bpos; 1744 *mbp = mb; 1745 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1746} 1747 1748void 1749nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1750 struct nfsrv_descript *nfsd; 1751 int after_ret; 1752 struct vattr *after_vap; 1753 struct mbuf **mbp; 1754 char **bposp; 1755{ 1756 register struct mbuf *mb = *mbp, *mb2; 1757 register char *bpos = *bposp; 1758 register u_long *tl; 1759 register struct nfs_fattr *fp; 1760 1761 if (after_ret) { 1762 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1763 *tl = nfs_false; 1764 } else { 1765 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1766 *tl++ = nfs_true; 1767 fp = (struct nfs_fattr *)tl; 1768 nfsm_srvfattr(nfsd, after_vap, fp); 1769 } 1770 *mbp = mb; 1771 *bposp = bpos; 1772} 1773 1774void 1775nfsm_srvfattr(nfsd, vap, fp) 1776 register struct nfsrv_descript *nfsd; 1777 register struct vattr *vap; 1778 register struct nfs_fattr *fp; 1779{ 1780 1781 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1782 fp->fa_uid = txdr_unsigned(vap->va_uid); 1783 fp->fa_gid = txdr_unsigned(vap->va_gid); 1784 if (nfsd->nd_flag & ND_NFSV3) { 1785 fp->fa_type = vtonfsv3_type(vap->va_type); 1786 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1787 txdr_hyper(&vap->va_size, &fp->fa3_size); 1788 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1789 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1790 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1791 fp->fa3_fsid.nfsuquad[0] = 0; 1792 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1793 fp->fa3_fileid.nfsuquad[0] = 0; 1794 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1795 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1796 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1797 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1798 } else { 1799 fp->fa_type = vtonfsv2_type(vap->va_type); 1800 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1801 fp->fa2_size = txdr_unsigned(vap->va_size); 1802 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1803 if (vap->va_type == VFIFO) 1804 fp->fa2_rdev = 0xffffffff; 1805 else 1806 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1807 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1808 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1809 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1810 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1811 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1812 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1813 } 1814} 1815 1816/* 1817 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1818 * - look up fsid in mount list (if not found ret error) 1819 * - get vp and export rights by calling VFS_FHTOVP() 1820 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1821 * - if not lockflag unlock it with VOP_UNLOCK() 1822 */ 1823int 1824nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1825 fhandle_t *fhp; 1826 int lockflag; 1827 struct vnode **vpp; 1828 struct ucred *cred; 1829 struct nfssvc_sock *slp; 1830 struct sockaddr *nam; 1831 int *rdonlyp; 1832 int kerbflag; 1833 int pubflag; 1834{ 1835 struct proc *p = curproc; /* XXX */ 1836 register struct mount *mp; 1837 register int i; 1838 struct ucred *credanon; 1839 int error, exflags; 1840 1841 *vpp = (struct vnode *)0; 1842 1843 if (nfs_ispublicfh(fhp)) { 1844 if (!pubflag || !nfs_pub.np_valid) 1845 return (ESTALE); 1846 fhp = &nfs_pub.np_handle; 1847 } 1848 1849 mp = vfs_getvfs(&fhp->fh_fsid); 1850 if (!mp) 1851 return (ESTALE); 1852 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1853 if (error) 1854 return (error); 1855 /* 1856 * Check/setup credentials. 1857 */ 1858 if (exflags & MNT_EXKERB) { 1859 if (!kerbflag) { 1860 vput(*vpp); 1861 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1862 } 1863 } else if (kerbflag) { 1864 vput(*vpp); 1865 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1866 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1867 cred->cr_uid = credanon->cr_uid; 1868 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1869 cred->cr_groups[i] = credanon->cr_groups[i]; 1870 cred->cr_ngroups = i; 1871 } 1872 if (exflags & MNT_EXRDONLY) 1873 *rdonlyp = 1; 1874 else 1875 *rdonlyp = 0; 1876 1877 nfsrv_object_create(*vpp); 1878 1879 if (!lockflag) 1880 VOP_UNLOCK(*vpp, 0, p); 1881 return (0); 1882} 1883 1884 1885/* 1886 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1887 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1888 * transformed this to all zeroes in both cases, so check for it. 1889 */ 1890int 1891nfs_ispublicfh(fhp) 1892 fhandle_t *fhp; 1893{ 1894 char *cp = (char *)fhp; 1895 int i; 1896 1897 for (i = 0; i < NFSX_V3FH; i++) 1898 if (*cp++ != 0) 1899 return (FALSE); 1900 return (TRUE); 1901} 1902 1903#endif /* NFS_NOSERVER */ 1904/* 1905 * This function compares two net addresses by family and returns TRUE 1906 * if they are the same host. 1907 * If there is any doubt, return FALSE. 1908 * The AF_INET family is handled as a special case so that address mbufs 1909 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1910 */ 1911int 1912netaddr_match(family, haddr, nam) 1913 int family; 1914 union nethostaddr *haddr; 1915 struct sockaddr *nam; 1916{ 1917 register struct sockaddr_in *inetaddr; 1918 1919 switch (family) { 1920 case AF_INET: 1921 inetaddr = (struct sockaddr_in *)nam; 1922 if (inetaddr->sin_family == AF_INET && 1923 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1924 return (1); 1925 break; 1926#ifdef ISO 1927 case AF_ISO: 1928 { 1929 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1930 1931 isoaddr1 = (struct sockaddr_iso *)nam; 1932 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1933 if (isoaddr1->siso_family == AF_ISO && 1934 isoaddr1->siso_nlen > 0 && 1935 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1936 SAME_ISOADDR(isoaddr1, isoaddr2)) 1937 return (1); 1938 break; 1939 } 1940#endif /* ISO */ 1941 default: 1942 break; 1943 }; 1944 return (0); 1945} 1946 1947static nfsuint64 nfs_nullcookie = { 0, 0 }; 1948/* 1949 * This function finds the directory cookie that corresponds to the 1950 * logical byte offset given. 1951 */ 1952nfsuint64 * 1953nfs_getcookie(np, off, add) 1954 register struct nfsnode *np; 1955 off_t off; 1956 int add; 1957{ 1958 register struct nfsdmap *dp, *dp2; 1959 register int pos; 1960 1961 pos = off / NFS_DIRBLKSIZ; 1962 if (pos == 0) { 1963#ifdef DIAGNOSTIC 1964 if (add) 1965 panic("nfs getcookie add at 0"); 1966#endif 1967 return (&nfs_nullcookie); 1968 } 1969 pos--; 1970 dp = np->n_cookies.lh_first; 1971 if (!dp) { 1972 if (add) { 1973 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1974 M_NFSDIROFF, M_WAITOK); 1975 dp->ndm_eocookie = 0; 1976 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1977 } else 1978 return ((nfsuint64 *)0); 1979 } 1980 while (pos >= NFSNUMCOOKIES) { 1981 pos -= NFSNUMCOOKIES; 1982 if (dp->ndm_list.le_next) { 1983 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1984 pos >= dp->ndm_eocookie) 1985 return ((nfsuint64 *)0); 1986 dp = dp->ndm_list.le_next; 1987 } else if (add) { 1988 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1989 M_NFSDIROFF, M_WAITOK); 1990 dp2->ndm_eocookie = 0; 1991 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1992 dp = dp2; 1993 } else 1994 return ((nfsuint64 *)0); 1995 } 1996 if (pos >= dp->ndm_eocookie) { 1997 if (add) 1998 dp->ndm_eocookie = pos + 1; 1999 else 2000 return ((nfsuint64 *)0); 2001 } 2002 return (&dp->ndm_cookies[pos]); 2003} 2004 2005/* 2006 * Invalidate cached directory information, except for the actual directory 2007 * blocks (which are invalidated separately). 2008 * Done mainly to avoid the use of stale offset cookies. 2009 */ 2010void 2011nfs_invaldir(vp) 2012 register struct vnode *vp; 2013{ 2014 register struct nfsnode *np = VTONFS(vp); 2015 2016#ifdef DIAGNOSTIC 2017 if (vp->v_type != VDIR) 2018 panic("nfs: invaldir not dir"); 2019#endif 2020 np->n_direofoffset = 0; 2021 np->n_cookieverf.nfsuquad[0] = 0; 2022 np->n_cookieverf.nfsuquad[1] = 0; 2023 if (np->n_cookies.lh_first) 2024 np->n_cookies.lh_first->ndm_eocookie = 0; 2025} 2026 2027/* 2028 * The write verifier has changed (probably due to a server reboot), so all 2029 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2030 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2031 * flag. Once done the new write verifier can be set for the mount point. 2032 */ 2033void 2034nfs_clearcommit(mp) 2035 struct mount *mp; 2036{ 2037 register struct vnode *vp, *nvp; 2038 register struct buf *bp, *nbp; 2039 int s; 2040 2041 s = splbio(); 2042loop: 2043 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2044 if (vp->v_mount != mp) /* Paranoia */ 2045 goto loop; 2046 nvp = vp->v_mntvnodes.le_next; 2047 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2048 nbp = bp->b_vnbufs.le_next; 2049 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2050 == (B_DELWRI | B_NEEDCOMMIT)) 2051 bp->b_flags &= ~B_NEEDCOMMIT; 2052 } 2053 } 2054 splx(s); 2055} 2056 2057#ifndef NFS_NOSERVER 2058/* 2059 * Map errnos to NFS error numbers. For Version 3 also filter out error 2060 * numbers not specified for the associated procedure. 2061 */ 2062int 2063nfsrv_errmap(nd, err) 2064 struct nfsrv_descript *nd; 2065 register int err; 2066{ 2067 register short *defaulterrp, *errp; 2068 2069 if (nd->nd_flag & ND_NFSV3) { 2070 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2071 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2072 while (*++errp) { 2073 if (*errp == err) 2074 return (err); 2075 else if (*errp > err) 2076 break; 2077 } 2078 return ((int)*defaulterrp); 2079 } else 2080 return (err & 0xffff); 2081 } 2082 if (err <= ELAST) 2083 return ((int)nfsrv_v2errmap[err - 1]); 2084 return (NFSERR_IO); 2085} 2086 2087int 2088nfsrv_object_create(vp) 2089 struct vnode *vp; 2090{ 2091 2092 if (vp == NULL || vp->v_type != VREG) 2093 return (1); 2094 return (vfs_object_create(vp, curproc, 2095 curproc ? curproc->p_ucred : NULL, 1)); 2096} 2097#endif /* NFS_NOSERVER */ 2098