nfs_srvsubs.c revision 31016
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 1.46 1997/10/28 15:59:08 bde Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/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/sysent.h> 57#include <sys/syscall.h> 58 59#include <vm/vm.h> 60#include <vm/vm_object.h> 61#include <vm/vm_extern.h> 62 63#include <nfs/rpcv2.h> 64#include <nfs/nfsproto.h> 65#include <nfs/nfs.h> 66#include <nfs/nfsnode.h> 67#include <nfs/xdr_subs.h> 68#include <nfs/nfsm_subs.h> 69#include <nfs/nfsmount.h> 70#include <nfs/nqnfs.h> 71#include <nfs/nfsrtt.h> 72 73#include <miscfs/specfs/specdev.h> 74 75#include <netinet/in.h> 76#ifdef ISO 77#include <netiso/iso.h> 78#endif 79 80/* 81 * Data items converted to xdr at startup, since they are constant 82 * This is kinda hokey, but may save a little time doing byte swaps 83 */ 84u_long nfs_xdrneg1; 85u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 86 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 87 rpc_auth_kerb; 88u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 89 90/* And other global data */ 91static u_long nfs_xid = 0; 92static enum vtype nv2tov_type[8]= { 93 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 94}; 95enum vtype nv3tov_type[8]= { 96 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 97}; 98 99int nfs_mount_type; 100int nfs_ticks; 101 102struct nfs_reqq nfs_reqq; 103struct nfssvc_sockhead nfssvc_sockhead; 104int nfssvc_sockhead_flag; 105struct nfsd_head nfsd_head; 106int nfsd_head_flag; 107struct nfs_bufq nfs_bufq; 108struct nqtimerhead nqtimerhead; 109struct nqfhhashhead *nqfhhashtbl; 110u_long nqfhhash; 111 112#ifndef NFS_NOSERVER 113/* 114 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 115 */ 116int nfsv3_procid[NFS_NPROCS] = { 117 NFSPROC_NULL, 118 NFSPROC_GETATTR, 119 NFSPROC_SETATTR, 120 NFSPROC_NOOP, 121 NFSPROC_LOOKUP, 122 NFSPROC_READLINK, 123 NFSPROC_READ, 124 NFSPROC_NOOP, 125 NFSPROC_WRITE, 126 NFSPROC_CREATE, 127 NFSPROC_REMOVE, 128 NFSPROC_RENAME, 129 NFSPROC_LINK, 130 NFSPROC_SYMLINK, 131 NFSPROC_MKDIR, 132 NFSPROC_RMDIR, 133 NFSPROC_READDIR, 134 NFSPROC_FSSTAT, 135 NFSPROC_NOOP, 136 NFSPROC_NOOP, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP 143}; 144 145#endif /* NFS_NOSERVER */ 146/* 147 * and the reverse mapping from generic to Version 2 procedure numbers 148 */ 149int nfsv2_procid[NFS_NPROCS] = { 150 NFSV2PROC_NULL, 151 NFSV2PROC_GETATTR, 152 NFSV2PROC_SETATTR, 153 NFSV2PROC_LOOKUP, 154 NFSV2PROC_NOOP, 155 NFSV2PROC_READLINK, 156 NFSV2PROC_READ, 157 NFSV2PROC_WRITE, 158 NFSV2PROC_CREATE, 159 NFSV2PROC_MKDIR, 160 NFSV2PROC_SYMLINK, 161 NFSV2PROC_CREATE, 162 NFSV2PROC_REMOVE, 163 NFSV2PROC_RMDIR, 164 NFSV2PROC_RENAME, 165 NFSV2PROC_LINK, 166 NFSV2PROC_READDIR, 167 NFSV2PROC_NOOP, 168 NFSV2PROC_STATFS, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176}; 177 178#ifndef NFS_NOSERVER 179/* 180 * Maps errno values to nfs error numbers. 181 * Use NFSERR_IO as the catch all for ones not specifically defined in 182 * RFC 1094. 183 */ 184static u_char nfsrv_v2errmap[ELAST] = { 185 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 186 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 188 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 189 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 191 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 198 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 202}; 203 204/* 205 * Maps errno values to nfs error numbers. 206 * Although it is not obvious whether or not NFS clients really care if 207 * a returned error value is in the specified list for the procedure, the 208 * safest thing to do is filter them appropriately. For Version 2, the 209 * X/Open XNFS document is the only specification that defines error values 210 * for each RPC (The RFC simply lists all possible error values for all RPCs), 211 * so I have decided to not do this for Version 2. 212 * The first entry is the default error return and the rest are the valid 213 * errors for that RPC in increasing numeric order. 214 */ 215static short nfsv3err_null[] = { 216 0, 217 0, 218}; 219 220static short nfsv3err_getattr[] = { 221 NFSERR_IO, 222 NFSERR_IO, 223 NFSERR_STALE, 224 NFSERR_BADHANDLE, 225 NFSERR_SERVERFAULT, 226 0, 227}; 228 229static short nfsv3err_setattr[] = { 230 NFSERR_IO, 231 NFSERR_PERM, 232 NFSERR_IO, 233 NFSERR_ACCES, 234 NFSERR_INVAL, 235 NFSERR_NOSPC, 236 NFSERR_ROFS, 237 NFSERR_DQUOT, 238 NFSERR_STALE, 239 NFSERR_BADHANDLE, 240 NFSERR_NOT_SYNC, 241 NFSERR_SERVERFAULT, 242 0, 243}; 244 245static short nfsv3err_lookup[] = { 246 NFSERR_IO, 247 NFSERR_NOENT, 248 NFSERR_IO, 249 NFSERR_ACCES, 250 NFSERR_NOTDIR, 251 NFSERR_NAMETOL, 252 NFSERR_STALE, 253 NFSERR_BADHANDLE, 254 NFSERR_SERVERFAULT, 255 0, 256}; 257 258static short nfsv3err_access[] = { 259 NFSERR_IO, 260 NFSERR_IO, 261 NFSERR_STALE, 262 NFSERR_BADHANDLE, 263 NFSERR_SERVERFAULT, 264 0, 265}; 266 267static short nfsv3err_readlink[] = { 268 NFSERR_IO, 269 NFSERR_IO, 270 NFSERR_ACCES, 271 NFSERR_INVAL, 272 NFSERR_STALE, 273 NFSERR_BADHANDLE, 274 NFSERR_NOTSUPP, 275 NFSERR_SERVERFAULT, 276 0, 277}; 278 279static short nfsv3err_read[] = { 280 NFSERR_IO, 281 NFSERR_IO, 282 NFSERR_NXIO, 283 NFSERR_ACCES, 284 NFSERR_INVAL, 285 NFSERR_STALE, 286 NFSERR_BADHANDLE, 287 NFSERR_SERVERFAULT, 288 0, 289}; 290 291static short nfsv3err_write[] = { 292 NFSERR_IO, 293 NFSERR_IO, 294 NFSERR_ACCES, 295 NFSERR_INVAL, 296 NFSERR_FBIG, 297 NFSERR_NOSPC, 298 NFSERR_ROFS, 299 NFSERR_DQUOT, 300 NFSERR_STALE, 301 NFSERR_BADHANDLE, 302 NFSERR_SERVERFAULT, 303 0, 304}; 305 306static short nfsv3err_create[] = { 307 NFSERR_IO, 308 NFSERR_IO, 309 NFSERR_ACCES, 310 NFSERR_EXIST, 311 NFSERR_NOTDIR, 312 NFSERR_NOSPC, 313 NFSERR_ROFS, 314 NFSERR_NAMETOL, 315 NFSERR_DQUOT, 316 NFSERR_STALE, 317 NFSERR_BADHANDLE, 318 NFSERR_NOTSUPP, 319 NFSERR_SERVERFAULT, 320 0, 321}; 322 323static short nfsv3err_mkdir[] = { 324 NFSERR_IO, 325 NFSERR_IO, 326 NFSERR_ACCES, 327 NFSERR_EXIST, 328 NFSERR_NOTDIR, 329 NFSERR_NOSPC, 330 NFSERR_ROFS, 331 NFSERR_NAMETOL, 332 NFSERR_DQUOT, 333 NFSERR_STALE, 334 NFSERR_BADHANDLE, 335 NFSERR_NOTSUPP, 336 NFSERR_SERVERFAULT, 337 0, 338}; 339 340static short nfsv3err_symlink[] = { 341 NFSERR_IO, 342 NFSERR_IO, 343 NFSERR_ACCES, 344 NFSERR_EXIST, 345 NFSERR_NOTDIR, 346 NFSERR_NOSPC, 347 NFSERR_ROFS, 348 NFSERR_NAMETOL, 349 NFSERR_DQUOT, 350 NFSERR_STALE, 351 NFSERR_BADHANDLE, 352 NFSERR_NOTSUPP, 353 NFSERR_SERVERFAULT, 354 0, 355}; 356 357static short nfsv3err_mknod[] = { 358 NFSERR_IO, 359 NFSERR_IO, 360 NFSERR_ACCES, 361 NFSERR_EXIST, 362 NFSERR_NOTDIR, 363 NFSERR_NOSPC, 364 NFSERR_ROFS, 365 NFSERR_NAMETOL, 366 NFSERR_DQUOT, 367 NFSERR_STALE, 368 NFSERR_BADHANDLE, 369 NFSERR_NOTSUPP, 370 NFSERR_SERVERFAULT, 371 NFSERR_BADTYPE, 372 0, 373}; 374 375static short nfsv3err_remove[] = { 376 NFSERR_IO, 377 NFSERR_NOENT, 378 NFSERR_IO, 379 NFSERR_ACCES, 380 NFSERR_NOTDIR, 381 NFSERR_ROFS, 382 NFSERR_NAMETOL, 383 NFSERR_STALE, 384 NFSERR_BADHANDLE, 385 NFSERR_SERVERFAULT, 386 0, 387}; 388 389static short nfsv3err_rmdir[] = { 390 NFSERR_IO, 391 NFSERR_NOENT, 392 NFSERR_IO, 393 NFSERR_ACCES, 394 NFSERR_EXIST, 395 NFSERR_NOTDIR, 396 NFSERR_INVAL, 397 NFSERR_ROFS, 398 NFSERR_NAMETOL, 399 NFSERR_NOTEMPTY, 400 NFSERR_STALE, 401 NFSERR_BADHANDLE, 402 NFSERR_NOTSUPP, 403 NFSERR_SERVERFAULT, 404 0, 405}; 406 407static short nfsv3err_rename[] = { 408 NFSERR_IO, 409 NFSERR_NOENT, 410 NFSERR_IO, 411 NFSERR_ACCES, 412 NFSERR_EXIST, 413 NFSERR_XDEV, 414 NFSERR_NOTDIR, 415 NFSERR_ISDIR, 416 NFSERR_INVAL, 417 NFSERR_NOSPC, 418 NFSERR_ROFS, 419 NFSERR_MLINK, 420 NFSERR_NAMETOL, 421 NFSERR_NOTEMPTY, 422 NFSERR_DQUOT, 423 NFSERR_STALE, 424 NFSERR_BADHANDLE, 425 NFSERR_NOTSUPP, 426 NFSERR_SERVERFAULT, 427 0, 428}; 429 430static short nfsv3err_link[] = { 431 NFSERR_IO, 432 NFSERR_IO, 433 NFSERR_ACCES, 434 NFSERR_EXIST, 435 NFSERR_XDEV, 436 NFSERR_NOTDIR, 437 NFSERR_INVAL, 438 NFSERR_NOSPC, 439 NFSERR_ROFS, 440 NFSERR_MLINK, 441 NFSERR_NAMETOL, 442 NFSERR_DQUOT, 443 NFSERR_STALE, 444 NFSERR_BADHANDLE, 445 NFSERR_NOTSUPP, 446 NFSERR_SERVERFAULT, 447 0, 448}; 449 450static short nfsv3err_readdir[] = { 451 NFSERR_IO, 452 NFSERR_IO, 453 NFSERR_ACCES, 454 NFSERR_NOTDIR, 455 NFSERR_STALE, 456 NFSERR_BADHANDLE, 457 NFSERR_BAD_COOKIE, 458 NFSERR_TOOSMALL, 459 NFSERR_SERVERFAULT, 460 0, 461}; 462 463static short nfsv3err_readdirplus[] = { 464 NFSERR_IO, 465 NFSERR_IO, 466 NFSERR_ACCES, 467 NFSERR_NOTDIR, 468 NFSERR_STALE, 469 NFSERR_BADHANDLE, 470 NFSERR_BAD_COOKIE, 471 NFSERR_NOTSUPP, 472 NFSERR_TOOSMALL, 473 NFSERR_SERVERFAULT, 474 0, 475}; 476 477static short nfsv3err_fsstat[] = { 478 NFSERR_IO, 479 NFSERR_IO, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_SERVERFAULT, 483 0, 484}; 485 486static short nfsv3err_fsinfo[] = { 487 NFSERR_STALE, 488 NFSERR_STALE, 489 NFSERR_BADHANDLE, 490 NFSERR_SERVERFAULT, 491 0, 492}; 493 494static short nfsv3err_pathconf[] = { 495 NFSERR_STALE, 496 NFSERR_STALE, 497 NFSERR_BADHANDLE, 498 NFSERR_SERVERFAULT, 499 0, 500}; 501 502static short nfsv3err_commit[] = { 503 NFSERR_IO, 504 NFSERR_IO, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_SERVERFAULT, 508 0, 509}; 510 511static short *nfsrv_v3errmap[] = { 512 nfsv3err_null, 513 nfsv3err_getattr, 514 nfsv3err_setattr, 515 nfsv3err_lookup, 516 nfsv3err_access, 517 nfsv3err_readlink, 518 nfsv3err_read, 519 nfsv3err_write, 520 nfsv3err_create, 521 nfsv3err_mkdir, 522 nfsv3err_symlink, 523 nfsv3err_mknod, 524 nfsv3err_remove, 525 nfsv3err_rmdir, 526 nfsv3err_rename, 527 nfsv3err_link, 528 nfsv3err_readdir, 529 nfsv3err_readdirplus, 530 nfsv3err_fsstat, 531 nfsv3err_fsinfo, 532 nfsv3err_pathconf, 533 nfsv3err_commit, 534}; 535 536#endif /* NFS_NOSERVER */ 537 538extern struct nfsrtt nfsrtt; 539extern time_t nqnfsstarttime; 540extern int nqsrv_clockskew; 541extern int nqsrv_writeslack; 542extern int nqsrv_maxlease; 543extern struct nfsstats nfsstats; 544extern int nqnfs_piggy[NFS_NPROCS]; 545extern nfstype nfsv2_type[9]; 546extern nfstype nfsv3_type[9]; 547extern struct nfsnodehashhead *nfsnodehashtbl; 548extern u_long nfsnodehash; 549 550struct getfh_args; 551extern int getfh(struct proc *, struct getfh_args *, int *); 552struct nfssvc_args; 553extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 554 555LIST_HEAD(nfsnodehashhead, nfsnode); 556 557int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 558 559/* 560 * Create the header for an rpc request packet 561 * The hsiz is the size of the rest of the nfs request header. 562 * (just used to decide if a cluster is a good idea) 563 */ 564struct mbuf * 565nfsm_reqh(vp, procid, hsiz, bposp) 566 struct vnode *vp; 567 u_long procid; 568 int hsiz; 569 caddr_t *bposp; 570{ 571 register struct mbuf *mb; 572 register u_long *tl; 573 register caddr_t bpos; 574 struct mbuf *mb2; 575 struct nfsmount *nmp; 576 int nqflag; 577 578 MGET(mb, M_WAIT, MT_DATA); 579 if (hsiz >= MINCLSIZE) 580 MCLGET(mb, M_WAIT); 581 mb->m_len = 0; 582 bpos = mtod(mb, caddr_t); 583 584 /* 585 * For NQNFS, add lease request. 586 */ 587 if (vp) { 588 nmp = VFSTONFS(vp->v_mount); 589 if (nmp->nm_flag & NFSMNT_NQNFS) { 590 nqflag = NQNFS_NEEDLEASE(vp, procid); 591 if (nqflag) { 592 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 593 *tl++ = txdr_unsigned(nqflag); 594 *tl = txdr_unsigned(nmp->nm_leaseterm); 595 } else { 596 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 597 *tl = 0; 598 } 599 } 600 } 601 /* Finally, return values */ 602 *bposp = bpos; 603 return (mb); 604} 605 606/* 607 * Build the RPC header and fill in the authorization info. 608 * The authorization string argument is only used when the credentials 609 * come from outside of the kernel. 610 * Returns the head of the mbuf list. 611 */ 612struct mbuf * 613nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 614 verf_str, mrest, mrest_len, mbp, xidp) 615 register struct ucred *cr; 616 int nmflag; 617 int procid; 618 int auth_type; 619 int auth_len; 620 char *auth_str; 621 int verf_len; 622 char *verf_str; 623 struct mbuf *mrest; 624 int mrest_len; 625 struct mbuf **mbp; 626 u_long *xidp; 627{ 628 register struct mbuf *mb; 629 register u_long *tl; 630 register caddr_t bpos; 631 register int i; 632 struct mbuf *mreq, *mb2; 633 int siz, grpsiz, authsiz; 634 struct timeval tv; 635 static u_long base; 636 637 authsiz = nfsm_rndup(auth_len); 638 MGETHDR(mb, M_WAIT, MT_DATA); 639 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 640 MCLGET(mb, M_WAIT); 641 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 642 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 643 } else { 644 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 645 } 646 mb->m_len = 0; 647 mreq = mb; 648 bpos = mtod(mb, caddr_t); 649 650 /* 651 * First the RPC header. 652 */ 653 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 654 655 /* 656 * derive initial xid from system time 657 * XXX time is invalid if root not yet mounted 658 */ 659 if (!base && (rootvp)) { 660 microtime(&tv); 661 base = tv.tv_sec << 12; 662 nfs_xid = base; 663 } 664 /* 665 * Skip zero xid if it should ever happen. 666 */ 667 if (++nfs_xid == 0) 668 nfs_xid++; 669 670 *tl++ = *xidp = txdr_unsigned(nfs_xid); 671 *tl++ = rpc_call; 672 *tl++ = rpc_vers; 673 if (nmflag & NFSMNT_NQNFS) { 674 *tl++ = txdr_unsigned(NQNFS_PROG); 675 *tl++ = txdr_unsigned(NQNFS_VER3); 676 } else { 677 *tl++ = txdr_unsigned(NFS_PROG); 678 if (nmflag & NFSMNT_NFSV3) 679 *tl++ = txdr_unsigned(NFS_VER3); 680 else 681 *tl++ = txdr_unsigned(NFS_VER2); 682 } 683 if (nmflag & NFSMNT_NFSV3) 684 *tl++ = txdr_unsigned(procid); 685 else 686 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 687 688 /* 689 * And then the authorization cred. 690 */ 691 *tl++ = txdr_unsigned(auth_type); 692 *tl = txdr_unsigned(authsiz); 693 switch (auth_type) { 694 case RPCAUTH_UNIX: 695 nfsm_build(tl, u_long *, auth_len); 696 *tl++ = 0; /* stamp ?? */ 697 *tl++ = 0; /* NULL hostname */ 698 *tl++ = txdr_unsigned(cr->cr_uid); 699 *tl++ = txdr_unsigned(cr->cr_groups[0]); 700 grpsiz = (auth_len >> 2) - 5; 701 *tl++ = txdr_unsigned(grpsiz); 702 for (i = 1; i <= grpsiz; i++) 703 *tl++ = txdr_unsigned(cr->cr_groups[i]); 704 break; 705 case RPCAUTH_KERB4: 706 siz = auth_len; 707 while (siz > 0) { 708 if (M_TRAILINGSPACE(mb) == 0) { 709 MGET(mb2, M_WAIT, MT_DATA); 710 if (siz >= MINCLSIZE) 711 MCLGET(mb2, M_WAIT); 712 mb->m_next = mb2; 713 mb = mb2; 714 mb->m_len = 0; 715 bpos = mtod(mb, caddr_t); 716 } 717 i = min(siz, M_TRAILINGSPACE(mb)); 718 bcopy(auth_str, bpos, i); 719 mb->m_len += i; 720 auth_str += i; 721 bpos += i; 722 siz -= i; 723 } 724 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 725 for (i = 0; i < siz; i++) 726 *bpos++ = '\0'; 727 mb->m_len += siz; 728 } 729 break; 730 }; 731 732 /* 733 * And the verifier... 734 */ 735 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 736 if (verf_str) { 737 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 738 *tl = txdr_unsigned(verf_len); 739 siz = verf_len; 740 while (siz > 0) { 741 if (M_TRAILINGSPACE(mb) == 0) { 742 MGET(mb2, M_WAIT, MT_DATA); 743 if (siz >= MINCLSIZE) 744 MCLGET(mb2, M_WAIT); 745 mb->m_next = mb2; 746 mb = mb2; 747 mb->m_len = 0; 748 bpos = mtod(mb, caddr_t); 749 } 750 i = min(siz, M_TRAILINGSPACE(mb)); 751 bcopy(verf_str, bpos, i); 752 mb->m_len += i; 753 verf_str += i; 754 bpos += i; 755 siz -= i; 756 } 757 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 758 for (i = 0; i < siz; i++) 759 *bpos++ = '\0'; 760 mb->m_len += siz; 761 } 762 } else { 763 *tl++ = txdr_unsigned(RPCAUTH_NULL); 764 *tl = 0; 765 } 766 mb->m_next = mrest; 767 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 768 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 769 *mbp = mb; 770 return (mreq); 771} 772 773/* 774 * copies mbuf chain to the uio scatter/gather list 775 */ 776int 777nfsm_mbuftouio(mrep, uiop, siz, dpos) 778 struct mbuf **mrep; 779 register struct uio *uiop; 780 int siz; 781 caddr_t *dpos; 782{ 783 register char *mbufcp, *uiocp; 784 register int xfer, left, len; 785 register struct mbuf *mp; 786 long uiosiz, rem; 787 int error = 0; 788 789 mp = *mrep; 790 mbufcp = *dpos; 791 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 792 rem = nfsm_rndup(siz)-siz; 793 while (siz > 0) { 794 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 795 return (EFBIG); 796 left = uiop->uio_iov->iov_len; 797 uiocp = uiop->uio_iov->iov_base; 798 if (left > siz) 799 left = siz; 800 uiosiz = left; 801 while (left > 0) { 802 while (len == 0) { 803 mp = mp->m_next; 804 if (mp == NULL) 805 return (EBADRPC); 806 mbufcp = mtod(mp, caddr_t); 807 len = mp->m_len; 808 } 809 xfer = (left > len) ? len : left; 810#ifdef notdef 811 /* Not Yet.. */ 812 if (uiop->uio_iov->iov_op != NULL) 813 (*(uiop->uio_iov->iov_op)) 814 (mbufcp, uiocp, xfer); 815 else 816#endif 817 if (uiop->uio_segflg == UIO_SYSSPACE) 818 bcopy(mbufcp, uiocp, xfer); 819 else 820 copyout(mbufcp, uiocp, xfer); 821 left -= xfer; 822 len -= xfer; 823 mbufcp += xfer; 824 uiocp += xfer; 825 uiop->uio_offset += xfer; 826 uiop->uio_resid -= xfer; 827 } 828 if (uiop->uio_iov->iov_len <= siz) { 829 uiop->uio_iovcnt--; 830 uiop->uio_iov++; 831 } else { 832 uiop->uio_iov->iov_base += uiosiz; 833 uiop->uio_iov->iov_len -= uiosiz; 834 } 835 siz -= uiosiz; 836 } 837 *dpos = mbufcp; 838 *mrep = mp; 839 if (rem > 0) { 840 if (len < rem) 841 error = nfs_adv(mrep, dpos, rem, len); 842 else 843 *dpos += rem; 844 } 845 return (error); 846} 847 848/* 849 * copies a uio scatter/gather list to an mbuf chain. 850 * NOTE: can ony handle iovcnt == 1 851 */ 852int 853nfsm_uiotombuf(uiop, mq, siz, bpos) 854 register struct uio *uiop; 855 struct mbuf **mq; 856 int siz; 857 caddr_t *bpos; 858{ 859 register char *uiocp; 860 register struct mbuf *mp, *mp2; 861 register int xfer, left, mlen; 862 int uiosiz, clflg, rem; 863 char *cp; 864 865 if (uiop->uio_iovcnt != 1) 866 panic("nfsm_uiotombuf: iovcnt != 1"); 867 868 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 869 clflg = 1; 870 else 871 clflg = 0; 872 rem = nfsm_rndup(siz)-siz; 873 mp = mp2 = *mq; 874 while (siz > 0) { 875 left = uiop->uio_iov->iov_len; 876 uiocp = uiop->uio_iov->iov_base; 877 if (left > siz) 878 left = siz; 879 uiosiz = left; 880 while (left > 0) { 881 mlen = M_TRAILINGSPACE(mp); 882 if (mlen == 0) { 883 MGET(mp, M_WAIT, MT_DATA); 884 if (clflg) 885 MCLGET(mp, M_WAIT); 886 mp->m_len = 0; 887 mp2->m_next = mp; 888 mp2 = mp; 889 mlen = M_TRAILINGSPACE(mp); 890 } 891 xfer = (left > mlen) ? mlen : left; 892#ifdef notdef 893 /* Not Yet.. */ 894 if (uiop->uio_iov->iov_op != NULL) 895 (*(uiop->uio_iov->iov_op)) 896 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 897 else 898#endif 899 if (uiop->uio_segflg == UIO_SYSSPACE) 900 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 901 else 902 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 903 mp->m_len += xfer; 904 left -= xfer; 905 uiocp += xfer; 906 uiop->uio_offset += xfer; 907 uiop->uio_resid -= xfer; 908 } 909 uiop->uio_iov->iov_base += uiosiz; 910 uiop->uio_iov->iov_len -= uiosiz; 911 siz -= uiosiz; 912 } 913 if (rem > 0) { 914 if (rem > M_TRAILINGSPACE(mp)) { 915 MGET(mp, M_WAIT, MT_DATA); 916 mp->m_len = 0; 917 mp2->m_next = mp; 918 } 919 cp = mtod(mp, caddr_t)+mp->m_len; 920 for (left = 0; left < rem; left++) 921 *cp++ = '\0'; 922 mp->m_len += rem; 923 *bpos = cp; 924 } else 925 *bpos = mtod(mp, caddr_t)+mp->m_len; 926 *mq = mp; 927 return (0); 928} 929 930/* 931 * Help break down an mbuf chain by setting the first siz bytes contiguous 932 * pointed to by returned val. 933 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 934 * cases. (The macros use the vars. dpos and dpos2) 935 */ 936int 937nfsm_disct(mdp, dposp, siz, left, cp2) 938 struct mbuf **mdp; 939 caddr_t *dposp; 940 int siz; 941 int left; 942 caddr_t *cp2; 943{ 944 register struct mbuf *mp, *mp2; 945 register int siz2, xfer; 946 register caddr_t p; 947 948 mp = *mdp; 949 while (left == 0) { 950 *mdp = mp = mp->m_next; 951 if (mp == NULL) 952 return (EBADRPC); 953 left = mp->m_len; 954 *dposp = mtod(mp, caddr_t); 955 } 956 if (left >= siz) { 957 *cp2 = *dposp; 958 *dposp += siz; 959 } else if (mp->m_next == NULL) { 960 return (EBADRPC); 961 } else if (siz > MHLEN) { 962 panic("nfs S too big"); 963 } else { 964 MGET(mp2, M_WAIT, MT_DATA); 965 mp2->m_next = mp->m_next; 966 mp->m_next = mp2; 967 mp->m_len -= left; 968 mp = mp2; 969 *cp2 = p = mtod(mp, caddr_t); 970 bcopy(*dposp, p, left); /* Copy what was left */ 971 siz2 = siz-left; 972 p += left; 973 mp2 = mp->m_next; 974 /* Loop around copying up the siz2 bytes */ 975 while (siz2 > 0) { 976 if (mp2 == NULL) 977 return (EBADRPC); 978 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 979 if (xfer > 0) { 980 bcopy(mtod(mp2, caddr_t), p, xfer); 981 NFSMADV(mp2, xfer); 982 mp2->m_len -= xfer; 983 p += xfer; 984 siz2 -= xfer; 985 } 986 if (siz2 > 0) 987 mp2 = mp2->m_next; 988 } 989 mp->m_len = siz; 990 *mdp = mp2; 991 *dposp = mtod(mp2, caddr_t); 992 } 993 return (0); 994} 995 996/* 997 * Advance the position in the mbuf chain. 998 */ 999int 1000nfs_adv(mdp, dposp, offs, left) 1001 struct mbuf **mdp; 1002 caddr_t *dposp; 1003 int offs; 1004 int left; 1005{ 1006 register struct mbuf *m; 1007 register int s; 1008 1009 m = *mdp; 1010 s = left; 1011 while (s < offs) { 1012 offs -= s; 1013 m = m->m_next; 1014 if (m == NULL) 1015 return (EBADRPC); 1016 s = m->m_len; 1017 } 1018 *mdp = m; 1019 *dposp = mtod(m, caddr_t)+offs; 1020 return (0); 1021} 1022 1023/* 1024 * Copy a string into mbufs for the hard cases... 1025 */ 1026int 1027nfsm_strtmbuf(mb, bpos, cp, siz) 1028 struct mbuf **mb; 1029 char **bpos; 1030 char *cp; 1031 long siz; 1032{ 1033 register struct mbuf *m1 = 0, *m2; 1034 long left, xfer, len, tlen; 1035 u_long *tl; 1036 int putsize; 1037 1038 putsize = 1; 1039 m2 = *mb; 1040 left = M_TRAILINGSPACE(m2); 1041 if (left > 0) { 1042 tl = ((u_long *)(*bpos)); 1043 *tl++ = txdr_unsigned(siz); 1044 putsize = 0; 1045 left -= NFSX_UNSIGNED; 1046 m2->m_len += NFSX_UNSIGNED; 1047 if (left > 0) { 1048 bcopy(cp, (caddr_t) tl, left); 1049 siz -= left; 1050 cp += left; 1051 m2->m_len += left; 1052 left = 0; 1053 } 1054 } 1055 /* Loop around adding mbufs */ 1056 while (siz > 0) { 1057 MGET(m1, M_WAIT, MT_DATA); 1058 if (siz > MLEN) 1059 MCLGET(m1, M_WAIT); 1060 m1->m_len = NFSMSIZ(m1); 1061 m2->m_next = m1; 1062 m2 = m1; 1063 tl = mtod(m1, u_long *); 1064 tlen = 0; 1065 if (putsize) { 1066 *tl++ = txdr_unsigned(siz); 1067 m1->m_len -= NFSX_UNSIGNED; 1068 tlen = NFSX_UNSIGNED; 1069 putsize = 0; 1070 } 1071 if (siz < m1->m_len) { 1072 len = nfsm_rndup(siz); 1073 xfer = siz; 1074 if (xfer < len) 1075 *(tl+(xfer>>2)) = 0; 1076 } else { 1077 xfer = len = m1->m_len; 1078 } 1079 bcopy(cp, (caddr_t) tl, xfer); 1080 m1->m_len = len+tlen; 1081 siz -= xfer; 1082 cp += xfer; 1083 } 1084 *mb = m1; 1085 *bpos = mtod(m1, caddr_t)+m1->m_len; 1086 return (0); 1087} 1088 1089/* 1090 * Called once to initialize data structures... 1091 */ 1092int 1093nfs_init(vfsp) 1094 struct vfsconf *vfsp; 1095{ 1096 register int i; 1097 1098 /* 1099 * Check to see if major data structures haven't bloated. 1100 */ 1101 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1102 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1103 printf("Try reducing NFS_SMALLFH\n"); 1104 } 1105 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1106 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1107 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1108 } 1109 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1110 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1111 printf("Try reducing NFS_UIDHASHSIZ\n"); 1112 } 1113 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1114 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1115 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1116 } 1117 nfs_mount_type = vfsp->vfc_typenum; 1118 nfsrtt.pos = 0; 1119 rpc_vers = txdr_unsigned(RPC_VER2); 1120 rpc_call = txdr_unsigned(RPC_CALL); 1121 rpc_reply = txdr_unsigned(RPC_REPLY); 1122 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1123 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1124 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1125 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1126 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1127 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1128 nfs_prog = txdr_unsigned(NFS_PROG); 1129 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1130 nfs_true = txdr_unsigned(TRUE); 1131 nfs_false = txdr_unsigned(FALSE); 1132 nfs_xdrneg1 = txdr_unsigned(-1); 1133 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1134 if (nfs_ticks < 1) 1135 nfs_ticks = 1; 1136 /* Ensure async daemons disabled */ 1137 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1138 nfs_iodwant[i] = (struct proc *)0; 1139 nfs_iodmount[i] = (struct nfsmount *)0; 1140 } 1141 nfs_nhinit(); /* Init the nfsnode table */ 1142#ifndef NFS_NOSERVER 1143 nfsrv_init(0); /* Init server data structures */ 1144 nfsrv_initcache(); /* Init the server request cache */ 1145#endif 1146 1147 /* 1148 * Initialize the nqnfs server stuff. 1149 */ 1150 if (nqnfsstarttime == 0) { 1151 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1152 + nqsrv_clockskew + nqsrv_writeslack; 1153 NQLOADNOVRAM(nqnfsstarttime); 1154 CIRCLEQ_INIT(&nqtimerhead); 1155 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1156 } 1157 1158 /* 1159 * Initialize reply list and start timer 1160 */ 1161 TAILQ_INIT(&nfs_reqq); 1162 1163 nfs_timer(0); 1164 1165 1166 /* 1167 * Set up lease_check and lease_updatetime so that other parts 1168 * of the system can call us, if we are loadable. 1169 */ 1170#ifndef NFS_NOSERVER 1171 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1172#endif 1173 lease_updatetime = nfs_lease_updatetime; 1174 vfsp->vfc_refcount++; /* make us non-unloadable */ 1175 sysent[SYS_nfssvc].sy_narg = 2; 1176 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1177#ifndef NFS_NOSERVER 1178 sysent[SYS_getfh].sy_narg = 2; 1179 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1180#endif 1181 1182 return (0); 1183} 1184 1185/* 1186 * Attribute cache routines. 1187 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1188 * that are on the mbuf list 1189 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1190 * error otherwise 1191 */ 1192 1193/* 1194 * Load the attribute cache (that lives in the nfsnode entry) with 1195 * the values on the mbuf list and 1196 * Iff vap not NULL 1197 * copy the attributes to *vaper 1198 */ 1199int 1200nfs_loadattrcache(vpp, mdp, dposp, vaper) 1201 struct vnode **vpp; 1202 struct mbuf **mdp; 1203 caddr_t *dposp; 1204 struct vattr *vaper; 1205{ 1206 register struct vnode *vp = *vpp; 1207 register struct vattr *vap; 1208 register struct nfs_fattr *fp; 1209 register struct nfsnode *np; 1210 register long t1; 1211 caddr_t cp2; 1212 int error = 0, rdev; 1213 struct mbuf *md; 1214 enum vtype vtyp; 1215 u_short vmode; 1216 struct timespec mtime; 1217 struct vnode *nvp; 1218 int v3 = NFS_ISV3(vp); 1219 1220 md = *mdp; 1221 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1222 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1223 return (error); 1224 fp = (struct nfs_fattr *)cp2; 1225 if (v3) { 1226 vtyp = nfsv3tov_type(fp->fa_type); 1227 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1228 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1229 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1230 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1231 } else { 1232 vtyp = nfsv2tov_type(fp->fa_type); 1233 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1234 /* 1235 * XXX 1236 * 1237 * The duplicate information returned in fa_type and fa_mode 1238 * is an ambiguity in the NFS version 2 protocol. 1239 * 1240 * VREG should be taken literally as a regular file. If a 1241 * server intents to return some type information differently 1242 * in the upper bits of the mode field (e.g. for sockets, or 1243 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1244 * leave the examination of the mode bits even in the VREG 1245 * case to avoid breakage for bogus servers, but we make sure 1246 * that there are actually type bits set in the upper part of 1247 * fa_mode (and failing that, trust the va_type field). 1248 * 1249 * NFSv3 cleared the issue, and requires fa_mode to not 1250 * contain any type information (while also introduing sockets 1251 * and FIFOs for fa_type). 1252 */ 1253 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1254 vtyp = IFTOVT(vmode); 1255 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1256 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1257 1258 /* 1259 * Really ugly NFSv2 kludge. 1260 */ 1261 if (vtyp == VCHR && rdev == 0xffffffff) 1262 vtyp = VFIFO; 1263 } 1264 1265 /* 1266 * If v_type == VNON it is a new node, so fill in the v_type, 1267 * n_mtime fields. Check to see if it represents a special 1268 * device, and if so, check for a possible alias. Once the 1269 * correct vnode has been obtained, fill in the rest of the 1270 * information. 1271 */ 1272 np = VTONFS(vp); 1273 if (vp->v_type != vtyp) { 1274 vp->v_type = vtyp; 1275 if (vp->v_type == VFIFO) { 1276 vp->v_op = fifo_nfsv2nodeop_p; 1277 } 1278 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1279 vp->v_op = spec_nfsv2nodeop_p; 1280 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1281 if (nvp) { 1282 /* 1283 * Discard unneeded vnode, but save its nfsnode. 1284 * Since the nfsnode does not have a lock, its 1285 * vnode lock has to be carried over. 1286 */ 1287 nvp->v_vnlock = vp->v_vnlock; 1288 vp->v_vnlock = NULL; 1289 nvp->v_data = vp->v_data; 1290 vp->v_data = NULL; 1291 vp->v_op = spec_vnodeop_p; 1292 vrele(vp); 1293 vgone(vp); 1294 /* 1295 * Reinitialize aliased node. 1296 */ 1297 np->n_vnode = nvp; 1298 *vpp = vp = nvp; 1299 } 1300 } 1301 np->n_mtime = mtime.tv_sec; 1302 } 1303 vap = &np->n_vattr; 1304 vap->va_type = vtyp; 1305 vap->va_mode = (vmode & 07777); 1306 vap->va_rdev = (dev_t)rdev; 1307 vap->va_mtime = mtime; 1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1309 if (v3) { 1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1313 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1314 vap->va_blocksize = NFS_FABLKSIZE; 1315 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1316 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1317 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1318 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1319 vap->va_flags = 0; 1320 vap->va_filerev = 0; 1321 } else { 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 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1326 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1327 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1328 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1329 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1330 vap->va_flags = 0; 1331 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1332 vap->va_ctime.tv_nsec = 0; 1333 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1334 vap->va_filerev = 0; 1335 } 1336 if (vap->va_size != np->n_size) { 1337 if (vap->va_type == VREG) { 1338 if (np->n_flag & NMODIFIED) { 1339 if (vap->va_size < np->n_size) 1340 vap->va_size = np->n_size; 1341 else 1342 np->n_size = vap->va_size; 1343 } else 1344 np->n_size = vap->va_size; 1345 vnode_pager_setsize(vp, (u_long)np->n_size); 1346 } else 1347 np->n_size = vap->va_size; 1348 } 1349 np->n_attrstamp = time.tv_sec; 1350 if (vaper != NULL) { 1351 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1352 if (np->n_flag & NCHG) { 1353 if (np->n_flag & NACC) 1354 vaper->va_atime = np->n_atim; 1355 if (np->n_flag & NUPD) 1356 vaper->va_mtime = np->n_mtim; 1357 } 1358 } 1359 return (0); 1360} 1361 1362/* 1363 * Check the time stamp 1364 * If the cache is valid, copy contents to *vap and return 0 1365 * otherwise return an error 1366 */ 1367int 1368nfs_getattrcache(vp, vaper) 1369 register struct vnode *vp; 1370 struct vattr *vaper; 1371{ 1372 register struct nfsnode *np = VTONFS(vp); 1373 register struct vattr *vap; 1374 1375 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1376 nfsstats.attrcache_misses++; 1377 return (ENOENT); 1378 } 1379 nfsstats.attrcache_hits++; 1380 vap = &np->n_vattr; 1381 if (vap->va_size != np->n_size) { 1382 if (vap->va_type == VREG) { 1383 if (np->n_flag & NMODIFIED) { 1384 if (vap->va_size < np->n_size) 1385 vap->va_size = np->n_size; 1386 else 1387 np->n_size = vap->va_size; 1388 } else 1389 np->n_size = vap->va_size; 1390 vnode_pager_setsize(vp, (u_long)np->n_size); 1391 } else 1392 np->n_size = vap->va_size; 1393 } 1394 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1395 if (np->n_flag & NCHG) { 1396 if (np->n_flag & NACC) 1397 vaper->va_atime = np->n_atim; 1398 if (np->n_flag & NUPD) 1399 vaper->va_mtime = np->n_mtim; 1400 } 1401 return (0); 1402} 1403 1404#ifndef NFS_NOSERVER 1405/* 1406 * Set up nameidata for a lookup() call and do it. 1407 * 1408 * If pubflag is set, this call is done for a lookup operation on the 1409 * public filehandle. In that case we allow crossing mountpoints and 1410 * absolute pathnames. However, the caller is expected to check that 1411 * the lookup result is within the public fs, and deny access if 1412 * it is not. 1413 */ 1414int 1415nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1416 register struct nameidata *ndp; 1417 fhandle_t *fhp; 1418 int len; 1419 struct nfssvc_sock *slp; 1420 struct sockaddr *nam; 1421 struct mbuf **mdp; 1422 caddr_t *dposp; 1423 struct vnode **retdirp; 1424 struct proc *p; 1425 int kerbflag, pubflag; 1426{ 1427 register int i, rem; 1428 register struct mbuf *md; 1429 register char *fromcp, *tocp, *cp; 1430 struct iovec aiov; 1431 struct uio auio; 1432 struct vnode *dp; 1433 int error, rdonly, linklen; 1434 struct componentname *cnp = &ndp->ni_cnd; 1435 1436 *retdirp = (struct vnode *)0; 1437 cnp->cn_pnbuf = zalloc(namei_zone); 1438 1439 /* 1440 * Copy the name from the mbuf list to ndp->ni_pnbuf 1441 * and set the various ndp fields appropriately. 1442 */ 1443 fromcp = *dposp; 1444 tocp = cnp->cn_pnbuf; 1445 md = *mdp; 1446 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1447 cnp->cn_hash = 0; 1448 for (i = 0; i < len; i++) { 1449 while (rem == 0) { 1450 md = md->m_next; 1451 if (md == NULL) { 1452 error = EBADRPC; 1453 goto out; 1454 } 1455 fromcp = mtod(md, caddr_t); 1456 rem = md->m_len; 1457 } 1458 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1459 error = EACCES; 1460 goto out; 1461 } 1462 cnp->cn_hash += (unsigned char)*fromcp; 1463 *tocp++ = *fromcp++; 1464 rem--; 1465 } 1466 *tocp = '\0'; 1467 *mdp = md; 1468 *dposp = fromcp; 1469 len = nfsm_rndup(len)-len; 1470 if (len > 0) { 1471 if (rem >= len) 1472 *dposp += len; 1473 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1474 goto out; 1475 } 1476 1477 /* 1478 * Extract and set starting directory. 1479 */ 1480 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1481 nam, &rdonly, kerbflag, pubflag); 1482 if (error) 1483 goto out; 1484 if (dp->v_type != VDIR) { 1485 vrele(dp); 1486 error = ENOTDIR; 1487 goto out; 1488 } 1489 1490 if (rdonly) 1491 cnp->cn_flags |= RDONLY; 1492 1493 *retdirp = dp; 1494 1495 if (pubflag) { 1496 /* 1497 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1498 * and the 'native path' indicator. 1499 */ 1500 cp = zalloc(namei_zone); 1501 fromcp = cnp->cn_pnbuf; 1502 tocp = cp; 1503 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1504 switch ((unsigned char)*fromcp) { 1505 case WEBNFS_NATIVE_CHAR: 1506 /* 1507 * 'Native' path for us is the same 1508 * as a path according to the NFS spec, 1509 * just skip the escape char. 1510 */ 1511 fromcp++; 1512 break; 1513 /* 1514 * More may be added in the future, range 0x80-0xff 1515 */ 1516 default: 1517 error = EIO; 1518 zfree(namei_zone, cp); 1519 goto out; 1520 } 1521 } 1522 /* 1523 * Translate the '%' escapes, URL-style. 1524 */ 1525 while (*fromcp != '\0') { 1526 if (*fromcp == WEBNFS_ESC_CHAR) { 1527 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1528 fromcp++; 1529 *tocp++ = HEXSTRTOI(fromcp); 1530 fromcp += 2; 1531 continue; 1532 } else { 1533 error = ENOENT; 1534 zfree(namei_zone, cp); 1535 goto out; 1536 } 1537 } else 1538 *tocp++ = *fromcp++; 1539 } 1540 *tocp = '\0'; 1541 zfree(namei_zone, cnp->cn_pnbuf); 1542 cnp->cn_pnbuf = cp; 1543 } 1544 1545 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1546 ndp->ni_segflg = UIO_SYSSPACE; 1547 1548 if (pubflag) { 1549 ndp->ni_rootdir = rootvnode; 1550 ndp->ni_loopcnt = 0; 1551 if (cnp->cn_pnbuf[0] == '/') 1552 dp = rootvnode; 1553 } else { 1554 cnp->cn_flags |= NOCROSSMOUNT; 1555 } 1556 1557 cnp->cn_proc = p; 1558 VREF(dp); 1559 1560 for (;;) { 1561 cnp->cn_nameptr = cnp->cn_pnbuf; 1562 ndp->ni_startdir = dp; 1563 /* 1564 * And call lookup() to do the real work 1565 */ 1566 error = lookup(ndp); 1567 if (error) 1568 break; 1569 /* 1570 * Check for encountering a symbolic link 1571 */ 1572 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1573 nfsrv_object_create(ndp->ni_vp); 1574 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1575 cnp->cn_flags |= HASBUF; 1576 return (0); 1577 } 1578 break; 1579 } else { 1580 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1581 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1582 if (!pubflag) { 1583 vrele(ndp->ni_dvp); 1584 vput(ndp->ni_vp); 1585 ndp->ni_vp = NULL; 1586 error = EINVAL; 1587 break; 1588 } 1589 1590 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1591 error = ELOOP; 1592 break; 1593 } 1594 if (ndp->ni_pathlen > 1) 1595 cp = zalloc(namei_zone); 1596 else 1597 cp = cnp->cn_pnbuf; 1598 aiov.iov_base = cp; 1599 aiov.iov_len = MAXPATHLEN; 1600 auio.uio_iov = &aiov; 1601 auio.uio_iovcnt = 1; 1602 auio.uio_offset = 0; 1603 auio.uio_rw = UIO_READ; 1604 auio.uio_segflg = UIO_SYSSPACE; 1605 auio.uio_procp = (struct proc *)0; 1606 auio.uio_resid = MAXPATHLEN; 1607 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1608 if (error) { 1609 badlink: 1610 if (ndp->ni_pathlen > 1) 1611 zfree(namei_zone, cp); 1612 break; 1613 } 1614 linklen = MAXPATHLEN - auio.uio_resid; 1615 if (linklen == 0) { 1616 error = ENOENT; 1617 goto badlink; 1618 } 1619 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1620 error = ENAMETOOLONG; 1621 goto badlink; 1622 } 1623 if (ndp->ni_pathlen > 1) { 1624 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1625 zfree(namei_zone, cnp->cn_pnbuf); 1626 cnp->cn_pnbuf = cp; 1627 } else 1628 cnp->cn_pnbuf[linklen] = '\0'; 1629 ndp->ni_pathlen += linklen; 1630 vput(ndp->ni_vp); 1631 dp = ndp->ni_dvp; 1632 /* 1633 * Check if root directory should replace current directory. 1634 */ 1635 if (cnp->cn_pnbuf[0] == '/') { 1636 vrele(dp); 1637 dp = ndp->ni_rootdir; 1638 VREF(dp); 1639 } 1640 } 1641 } 1642out: 1643 zfree(namei_zone, cnp->cn_pnbuf); 1644 return (error); 1645} 1646 1647/* 1648 * A fiddled version of m_adj() that ensures null fill to a long 1649 * boundary and only trims off the back end 1650 */ 1651void 1652nfsm_adj(mp, len, nul) 1653 struct mbuf *mp; 1654 register int len; 1655 int nul; 1656{ 1657 register struct mbuf *m; 1658 register int count, i; 1659 register char *cp; 1660 1661 /* 1662 * Trim from tail. Scan the mbuf chain, 1663 * calculating its length and finding the last mbuf. 1664 * If the adjustment only affects this mbuf, then just 1665 * adjust and return. Otherwise, rescan and truncate 1666 * after the remaining size. 1667 */ 1668 count = 0; 1669 m = mp; 1670 for (;;) { 1671 count += m->m_len; 1672 if (m->m_next == (struct mbuf *)0) 1673 break; 1674 m = m->m_next; 1675 } 1676 if (m->m_len > len) { 1677 m->m_len -= len; 1678 if (nul > 0) { 1679 cp = mtod(m, caddr_t)+m->m_len-nul; 1680 for (i = 0; i < nul; i++) 1681 *cp++ = '\0'; 1682 } 1683 return; 1684 } 1685 count -= len; 1686 if (count < 0) 1687 count = 0; 1688 /* 1689 * Correct length for chain is "count". 1690 * Find the mbuf with last data, adjust its length, 1691 * and toss data from remaining mbufs on chain. 1692 */ 1693 for (m = mp; m; m = m->m_next) { 1694 if (m->m_len >= count) { 1695 m->m_len = count; 1696 if (nul > 0) { 1697 cp = mtod(m, caddr_t)+m->m_len-nul; 1698 for (i = 0; i < nul; i++) 1699 *cp++ = '\0'; 1700 } 1701 break; 1702 } 1703 count -= m->m_len; 1704 } 1705 for (m = m->m_next;m;m = m->m_next) 1706 m->m_len = 0; 1707} 1708 1709/* 1710 * Make these functions instead of macros, so that the kernel text size 1711 * doesn't get too big... 1712 */ 1713void 1714nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1715 struct nfsrv_descript *nfsd; 1716 int before_ret; 1717 register struct vattr *before_vap; 1718 int after_ret; 1719 struct vattr *after_vap; 1720 struct mbuf **mbp; 1721 char **bposp; 1722{ 1723 register struct mbuf *mb = *mbp, *mb2; 1724 register char *bpos = *bposp; 1725 register u_long *tl; 1726 1727 if (before_ret) { 1728 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1729 *tl = nfs_false; 1730 } else { 1731 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1732 *tl++ = nfs_true; 1733 txdr_hyper(&(before_vap->va_size), tl); 1734 tl += 2; 1735 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1736 tl += 2; 1737 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1738 } 1739 *bposp = bpos; 1740 *mbp = mb; 1741 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1742} 1743 1744void 1745nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1746 struct nfsrv_descript *nfsd; 1747 int after_ret; 1748 struct vattr *after_vap; 1749 struct mbuf **mbp; 1750 char **bposp; 1751{ 1752 register struct mbuf *mb = *mbp, *mb2; 1753 register char *bpos = *bposp; 1754 register u_long *tl; 1755 register struct nfs_fattr *fp; 1756 1757 if (after_ret) { 1758 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1759 *tl = nfs_false; 1760 } else { 1761 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1762 *tl++ = nfs_true; 1763 fp = (struct nfs_fattr *)tl; 1764 nfsm_srvfattr(nfsd, after_vap, fp); 1765 } 1766 *mbp = mb; 1767 *bposp = bpos; 1768} 1769 1770void 1771nfsm_srvfattr(nfsd, vap, fp) 1772 register struct nfsrv_descript *nfsd; 1773 register struct vattr *vap; 1774 register struct nfs_fattr *fp; 1775{ 1776 1777 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1778 fp->fa_uid = txdr_unsigned(vap->va_uid); 1779 fp->fa_gid = txdr_unsigned(vap->va_gid); 1780 if (nfsd->nd_flag & ND_NFSV3) { 1781 fp->fa_type = vtonfsv3_type(vap->va_type); 1782 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1783 txdr_hyper(&vap->va_size, &fp->fa3_size); 1784 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1785 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1786 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1787 fp->fa3_fsid.nfsuquad[0] = 0; 1788 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1789 fp->fa3_fileid.nfsuquad[0] = 0; 1790 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1791 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1792 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1793 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1794 } else { 1795 fp->fa_type = vtonfsv2_type(vap->va_type); 1796 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1797 fp->fa2_size = txdr_unsigned(vap->va_size); 1798 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1799 if (vap->va_type == VFIFO) 1800 fp->fa2_rdev = 0xffffffff; 1801 else 1802 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1803 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1804 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1805 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1806 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1807 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1808 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1809 } 1810} 1811 1812/* 1813 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1814 * - look up fsid in mount list (if not found ret error) 1815 * - get vp and export rights by calling VFS_FHTOVP() 1816 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1817 * - if not lockflag unlock it with VOP_UNLOCK() 1818 */ 1819int 1820nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1821 fhandle_t *fhp; 1822 int lockflag; 1823 struct vnode **vpp; 1824 struct ucred *cred; 1825 struct nfssvc_sock *slp; 1826 struct sockaddr *nam; 1827 int *rdonlyp; 1828 int kerbflag; 1829 int pubflag; 1830{ 1831 struct proc *p = curproc; /* XXX */ 1832 register struct mount *mp; 1833 register int i; 1834 struct ucred *credanon; 1835 int error, exflags; 1836 1837 *vpp = (struct vnode *)0; 1838 1839 if (nfs_ispublicfh(fhp)) { 1840 if (!pubflag || !nfs_pub.np_valid) 1841 return (ESTALE); 1842 fhp = &nfs_pub.np_handle; 1843 } 1844 1845 mp = vfs_getvfs(&fhp->fh_fsid); 1846 if (!mp) 1847 return (ESTALE); 1848 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1849 if (error) 1850 return (error); 1851 /* 1852 * Check/setup credentials. 1853 */ 1854 if (exflags & MNT_EXKERB) { 1855 if (!kerbflag) { 1856 vput(*vpp); 1857 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1858 } 1859 } else if (kerbflag) { 1860 vput(*vpp); 1861 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1862 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1863 cred->cr_uid = credanon->cr_uid; 1864 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1865 cred->cr_groups[i] = credanon->cr_groups[i]; 1866 cred->cr_ngroups = i; 1867 } 1868 if (exflags & MNT_EXRDONLY) 1869 *rdonlyp = 1; 1870 else 1871 *rdonlyp = 0; 1872 1873 nfsrv_object_create(*vpp); 1874 1875 if (!lockflag) 1876 VOP_UNLOCK(*vpp, 0, p); 1877 return (0); 1878} 1879 1880 1881/* 1882 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1883 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1884 * transformed this to all zeroes in both cases, so check for it. 1885 */ 1886int 1887nfs_ispublicfh(fhp) 1888 fhandle_t *fhp; 1889{ 1890 char *cp = (char *)fhp; 1891 int i; 1892 1893 for (i = 0; i < NFSX_V3FH; i++) 1894 if (*cp++ != 0) 1895 return (FALSE); 1896 return (TRUE); 1897} 1898 1899#endif /* NFS_NOSERVER */ 1900/* 1901 * This function compares two net addresses by family and returns TRUE 1902 * if they are the same host. 1903 * If there is any doubt, return FALSE. 1904 * The AF_INET family is handled as a special case so that address mbufs 1905 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1906 */ 1907int 1908netaddr_match(family, haddr, nam) 1909 int family; 1910 union nethostaddr *haddr; 1911 struct sockaddr *nam; 1912{ 1913 register struct sockaddr_in *inetaddr; 1914 1915 switch (family) { 1916 case AF_INET: 1917 inetaddr = (struct sockaddr_in *)nam; 1918 if (inetaddr->sin_family == AF_INET && 1919 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1920 return (1); 1921 break; 1922#ifdef ISO 1923 case AF_ISO: 1924 { 1925 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1926 1927 isoaddr1 = (struct sockaddr_iso *)nam; 1928 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1929 if (isoaddr1->siso_family == AF_ISO && 1930 isoaddr1->siso_nlen > 0 && 1931 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1932 SAME_ISOADDR(isoaddr1, isoaddr2)) 1933 return (1); 1934 break; 1935 } 1936#endif /* ISO */ 1937 default: 1938 break; 1939 }; 1940 return (0); 1941} 1942 1943static nfsuint64 nfs_nullcookie = { 0, 0 }; 1944/* 1945 * This function finds the directory cookie that corresponds to the 1946 * logical byte offset given. 1947 */ 1948nfsuint64 * 1949nfs_getcookie(np, off, add) 1950 register struct nfsnode *np; 1951 off_t off; 1952 int add; 1953{ 1954 register struct nfsdmap *dp, *dp2; 1955 register int pos; 1956 1957 pos = off / NFS_DIRBLKSIZ; 1958 if (pos == 0) { 1959#ifdef DIAGNOSTIC 1960 if (add) 1961 panic("nfs getcookie add at 0"); 1962#endif 1963 return (&nfs_nullcookie); 1964 } 1965 pos--; 1966 dp = np->n_cookies.lh_first; 1967 if (!dp) { 1968 if (add) { 1969 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1970 M_NFSDIROFF, M_WAITOK); 1971 dp->ndm_eocookie = 0; 1972 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1973 } else 1974 return ((nfsuint64 *)0); 1975 } 1976 while (pos >= NFSNUMCOOKIES) { 1977 pos -= NFSNUMCOOKIES; 1978 if (dp->ndm_list.le_next) { 1979 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1980 pos >= dp->ndm_eocookie) 1981 return ((nfsuint64 *)0); 1982 dp = dp->ndm_list.le_next; 1983 } else if (add) { 1984 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1985 M_NFSDIROFF, M_WAITOK); 1986 dp2->ndm_eocookie = 0; 1987 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1988 dp = dp2; 1989 } else 1990 return ((nfsuint64 *)0); 1991 } 1992 if (pos >= dp->ndm_eocookie) { 1993 if (add) 1994 dp->ndm_eocookie = pos + 1; 1995 else 1996 return ((nfsuint64 *)0); 1997 } 1998 return (&dp->ndm_cookies[pos]); 1999} 2000 2001/* 2002 * Invalidate cached directory information, except for the actual directory 2003 * blocks (which are invalidated separately). 2004 * Done mainly to avoid the use of stale offset cookies. 2005 */ 2006void 2007nfs_invaldir(vp) 2008 register struct vnode *vp; 2009{ 2010 register struct nfsnode *np = VTONFS(vp); 2011 2012#ifdef DIAGNOSTIC 2013 if (vp->v_type != VDIR) 2014 panic("nfs: invaldir not dir"); 2015#endif 2016 np->n_direofoffset = 0; 2017 np->n_cookieverf.nfsuquad[0] = 0; 2018 np->n_cookieverf.nfsuquad[1] = 0; 2019 if (np->n_cookies.lh_first) 2020 np->n_cookies.lh_first->ndm_eocookie = 0; 2021} 2022 2023/* 2024 * The write verifier has changed (probably due to a server reboot), so all 2025 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2026 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2027 * flag. Once done the new write verifier can be set for the mount point. 2028 */ 2029void 2030nfs_clearcommit(mp) 2031 struct mount *mp; 2032{ 2033 register struct vnode *vp, *nvp; 2034 register struct buf *bp, *nbp; 2035 int s; 2036 2037 s = splbio(); 2038loop: 2039 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2040 if (vp->v_mount != mp) /* Paranoia */ 2041 goto loop; 2042 nvp = vp->v_mntvnodes.le_next; 2043 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2044 nbp = bp->b_vnbufs.le_next; 2045 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2046 == (B_DELWRI | B_NEEDCOMMIT)) 2047 bp->b_flags &= ~B_NEEDCOMMIT; 2048 } 2049 } 2050 splx(s); 2051} 2052 2053#ifndef NFS_NOSERVER 2054/* 2055 * Map errnos to NFS error numbers. For Version 3 also filter out error 2056 * numbers not specified for the associated procedure. 2057 */ 2058int 2059nfsrv_errmap(nd, err) 2060 struct nfsrv_descript *nd; 2061 register int err; 2062{ 2063 register short *defaulterrp, *errp; 2064 2065 if (nd->nd_flag & ND_NFSV3) { 2066 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2067 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2068 while (*++errp) { 2069 if (*errp == err) 2070 return (err); 2071 else if (*errp > err) 2072 break; 2073 } 2074 return ((int)*defaulterrp); 2075 } else 2076 return (err & 0xffff); 2077 } 2078 if (err <= ELAST) 2079 return ((int)nfsrv_v2errmap[err - 1]); 2080 return (NFSERR_IO); 2081} 2082 2083int 2084nfsrv_object_create(struct vnode *vp) { 2085 2086 if ((vp == NULL) || (vp->v_type != VREG)) 2087 return 1; 2088 return vfs_object_create(vp, curproc, curproc?curproc->p_ucred:NULL, 1); 2089} 2090#endif /* NFS_NOSERVER */ 2091 2092