nfs_subs.c revision 31886
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 1.47 1997/11/07 08:53:24 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 64#include <nfs/rpcv2.h> 65#include <nfs/nfsproto.h> 66#include <nfs/nfs.h> 67#include <nfs/nfsnode.h> 68#include <nfs/xdr_subs.h> 69#include <nfs/nfsm_subs.h> 70#include <nfs/nfsmount.h> 71#include <nfs/nqnfs.h> 72#include <nfs/nfsrtt.h> 73 74#include <miscfs/specfs/specdev.h> 75 76#include <netinet/in.h> 77#ifdef ISO 78#include <netiso/iso.h> 79#endif 80 81/* 82 * Data items converted to xdr at startup, since they are constant 83 * This is kinda hokey, but may save a little time doing byte swaps 84 */ 85u_long nfs_xdrneg1; 86u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 87 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 88 rpc_auth_kerb; 89u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 90 91/* And other global data */ 92static u_long nfs_xid = 0; 93static enum vtype nv2tov_type[8]= { 94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 95}; 96enum vtype nv3tov_type[8]= { 97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 98}; 99 100int nfs_mount_type; 101int nfs_ticks; 102 103struct nfs_reqq nfs_reqq; 104struct nfssvc_sockhead nfssvc_sockhead; 105int nfssvc_sockhead_flag; 106struct nfsd_head nfsd_head; 107int nfsd_head_flag; 108struct nfs_bufq nfs_bufq; 109struct nqtimerhead nqtimerhead; 110struct nqfhhashhead *nqfhhashtbl; 111u_long nqfhhash; 112 113#ifndef NFS_NOSERVER 114/* 115 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 116 */ 117int nfsv3_procid[NFS_NPROCS] = { 118 NFSPROC_NULL, 119 NFSPROC_GETATTR, 120 NFSPROC_SETATTR, 121 NFSPROC_NOOP, 122 NFSPROC_LOOKUP, 123 NFSPROC_READLINK, 124 NFSPROC_READ, 125 NFSPROC_NOOP, 126 NFSPROC_WRITE, 127 NFSPROC_CREATE, 128 NFSPROC_REMOVE, 129 NFSPROC_RENAME, 130 NFSPROC_LINK, 131 NFSPROC_SYMLINK, 132 NFSPROC_MKDIR, 133 NFSPROC_RMDIR, 134 NFSPROC_READDIR, 135 NFSPROC_FSSTAT, 136 NFSPROC_NOOP, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP 144}; 145 146#endif /* NFS_NOSERVER */ 147/* 148 * and the reverse mapping from generic to Version 2 procedure numbers 149 */ 150int nfsv2_procid[NFS_NPROCS] = { 151 NFSV2PROC_NULL, 152 NFSV2PROC_GETATTR, 153 NFSV2PROC_SETATTR, 154 NFSV2PROC_LOOKUP, 155 NFSV2PROC_NOOP, 156 NFSV2PROC_READLINK, 157 NFSV2PROC_READ, 158 NFSV2PROC_WRITE, 159 NFSV2PROC_CREATE, 160 NFSV2PROC_MKDIR, 161 NFSV2PROC_SYMLINK, 162 NFSV2PROC_CREATE, 163 NFSV2PROC_REMOVE, 164 NFSV2PROC_RMDIR, 165 NFSV2PROC_RENAME, 166 NFSV2PROC_LINK, 167 NFSV2PROC_READDIR, 168 NFSV2PROC_NOOP, 169 NFSV2PROC_STATFS, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177}; 178 179#ifndef NFS_NOSERVER 180/* 181 * Maps errno values to nfs error numbers. 182 * Use NFSERR_IO as the catch all for ones not specifically defined in 183 * RFC 1094. 184 */ 185static u_char nfsrv_v2errmap[ELAST] = { 186 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 188 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 190 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 199 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, 203}; 204 205/* 206 * Maps errno values to nfs error numbers. 207 * Although it is not obvious whether or not NFS clients really care if 208 * a returned error value is in the specified list for the procedure, the 209 * safest thing to do is filter them appropriately. For Version 2, the 210 * X/Open XNFS document is the only specification that defines error values 211 * for each RPC (The RFC simply lists all possible error values for all RPCs), 212 * so I have decided to not do this for Version 2. 213 * The first entry is the default error return and the rest are the valid 214 * errors for that RPC in increasing numeric order. 215 */ 216static short nfsv3err_null[] = { 217 0, 218 0, 219}; 220 221static short nfsv3err_getattr[] = { 222 NFSERR_IO, 223 NFSERR_IO, 224 NFSERR_STALE, 225 NFSERR_BADHANDLE, 226 NFSERR_SERVERFAULT, 227 0, 228}; 229 230static short nfsv3err_setattr[] = { 231 NFSERR_IO, 232 NFSERR_PERM, 233 NFSERR_IO, 234 NFSERR_ACCES, 235 NFSERR_INVAL, 236 NFSERR_NOSPC, 237 NFSERR_ROFS, 238 NFSERR_DQUOT, 239 NFSERR_STALE, 240 NFSERR_BADHANDLE, 241 NFSERR_NOT_SYNC, 242 NFSERR_SERVERFAULT, 243 0, 244}; 245 246static short nfsv3err_lookup[] = { 247 NFSERR_IO, 248 NFSERR_NOENT, 249 NFSERR_IO, 250 NFSERR_ACCES, 251 NFSERR_NOTDIR, 252 NFSERR_NAMETOL, 253 NFSERR_STALE, 254 NFSERR_BADHANDLE, 255 NFSERR_SERVERFAULT, 256 0, 257}; 258 259static short nfsv3err_access[] = { 260 NFSERR_IO, 261 NFSERR_IO, 262 NFSERR_STALE, 263 NFSERR_BADHANDLE, 264 NFSERR_SERVERFAULT, 265 0, 266}; 267 268static short nfsv3err_readlink[] = { 269 NFSERR_IO, 270 NFSERR_IO, 271 NFSERR_ACCES, 272 NFSERR_INVAL, 273 NFSERR_STALE, 274 NFSERR_BADHANDLE, 275 NFSERR_NOTSUPP, 276 NFSERR_SERVERFAULT, 277 0, 278}; 279 280static short nfsv3err_read[] = { 281 NFSERR_IO, 282 NFSERR_IO, 283 NFSERR_NXIO, 284 NFSERR_ACCES, 285 NFSERR_INVAL, 286 NFSERR_STALE, 287 NFSERR_BADHANDLE, 288 NFSERR_SERVERFAULT, 289 0, 290}; 291 292static short nfsv3err_write[] = { 293 NFSERR_IO, 294 NFSERR_IO, 295 NFSERR_ACCES, 296 NFSERR_INVAL, 297 NFSERR_FBIG, 298 NFSERR_NOSPC, 299 NFSERR_ROFS, 300 NFSERR_DQUOT, 301 NFSERR_STALE, 302 NFSERR_BADHANDLE, 303 NFSERR_SERVERFAULT, 304 0, 305}; 306 307static short nfsv3err_create[] = { 308 NFSERR_IO, 309 NFSERR_IO, 310 NFSERR_ACCES, 311 NFSERR_EXIST, 312 NFSERR_NOTDIR, 313 NFSERR_NOSPC, 314 NFSERR_ROFS, 315 NFSERR_NAMETOL, 316 NFSERR_DQUOT, 317 NFSERR_STALE, 318 NFSERR_BADHANDLE, 319 NFSERR_NOTSUPP, 320 NFSERR_SERVERFAULT, 321 0, 322}; 323 324static short nfsv3err_mkdir[] = { 325 NFSERR_IO, 326 NFSERR_IO, 327 NFSERR_ACCES, 328 NFSERR_EXIST, 329 NFSERR_NOTDIR, 330 NFSERR_NOSPC, 331 NFSERR_ROFS, 332 NFSERR_NAMETOL, 333 NFSERR_DQUOT, 334 NFSERR_STALE, 335 NFSERR_BADHANDLE, 336 NFSERR_NOTSUPP, 337 NFSERR_SERVERFAULT, 338 0, 339}; 340 341static short nfsv3err_symlink[] = { 342 NFSERR_IO, 343 NFSERR_IO, 344 NFSERR_ACCES, 345 NFSERR_EXIST, 346 NFSERR_NOTDIR, 347 NFSERR_NOSPC, 348 NFSERR_ROFS, 349 NFSERR_NAMETOL, 350 NFSERR_DQUOT, 351 NFSERR_STALE, 352 NFSERR_BADHANDLE, 353 NFSERR_NOTSUPP, 354 NFSERR_SERVERFAULT, 355 0, 356}; 357 358static short nfsv3err_mknod[] = { 359 NFSERR_IO, 360 NFSERR_IO, 361 NFSERR_ACCES, 362 NFSERR_EXIST, 363 NFSERR_NOTDIR, 364 NFSERR_NOSPC, 365 NFSERR_ROFS, 366 NFSERR_NAMETOL, 367 NFSERR_DQUOT, 368 NFSERR_STALE, 369 NFSERR_BADHANDLE, 370 NFSERR_NOTSUPP, 371 NFSERR_SERVERFAULT, 372 NFSERR_BADTYPE, 373 0, 374}; 375 376static short nfsv3err_remove[] = { 377 NFSERR_IO, 378 NFSERR_NOENT, 379 NFSERR_IO, 380 NFSERR_ACCES, 381 NFSERR_NOTDIR, 382 NFSERR_ROFS, 383 NFSERR_NAMETOL, 384 NFSERR_STALE, 385 NFSERR_BADHANDLE, 386 NFSERR_SERVERFAULT, 387 0, 388}; 389 390static short nfsv3err_rmdir[] = { 391 NFSERR_IO, 392 NFSERR_NOENT, 393 NFSERR_IO, 394 NFSERR_ACCES, 395 NFSERR_EXIST, 396 NFSERR_NOTDIR, 397 NFSERR_INVAL, 398 NFSERR_ROFS, 399 NFSERR_NAMETOL, 400 NFSERR_NOTEMPTY, 401 NFSERR_STALE, 402 NFSERR_BADHANDLE, 403 NFSERR_NOTSUPP, 404 NFSERR_SERVERFAULT, 405 0, 406}; 407 408static short nfsv3err_rename[] = { 409 NFSERR_IO, 410 NFSERR_NOENT, 411 NFSERR_IO, 412 NFSERR_ACCES, 413 NFSERR_EXIST, 414 NFSERR_XDEV, 415 NFSERR_NOTDIR, 416 NFSERR_ISDIR, 417 NFSERR_INVAL, 418 NFSERR_NOSPC, 419 NFSERR_ROFS, 420 NFSERR_MLINK, 421 NFSERR_NAMETOL, 422 NFSERR_NOTEMPTY, 423 NFSERR_DQUOT, 424 NFSERR_STALE, 425 NFSERR_BADHANDLE, 426 NFSERR_NOTSUPP, 427 NFSERR_SERVERFAULT, 428 0, 429}; 430 431static short nfsv3err_link[] = { 432 NFSERR_IO, 433 NFSERR_IO, 434 NFSERR_ACCES, 435 NFSERR_EXIST, 436 NFSERR_XDEV, 437 NFSERR_NOTDIR, 438 NFSERR_INVAL, 439 NFSERR_NOSPC, 440 NFSERR_ROFS, 441 NFSERR_MLINK, 442 NFSERR_NAMETOL, 443 NFSERR_DQUOT, 444 NFSERR_STALE, 445 NFSERR_BADHANDLE, 446 NFSERR_NOTSUPP, 447 NFSERR_SERVERFAULT, 448 0, 449}; 450 451static short nfsv3err_readdir[] = { 452 NFSERR_IO, 453 NFSERR_IO, 454 NFSERR_ACCES, 455 NFSERR_NOTDIR, 456 NFSERR_STALE, 457 NFSERR_BADHANDLE, 458 NFSERR_BAD_COOKIE, 459 NFSERR_TOOSMALL, 460 NFSERR_SERVERFAULT, 461 0, 462}; 463 464static short nfsv3err_readdirplus[] = { 465 NFSERR_IO, 466 NFSERR_IO, 467 NFSERR_ACCES, 468 NFSERR_NOTDIR, 469 NFSERR_STALE, 470 NFSERR_BADHANDLE, 471 NFSERR_BAD_COOKIE, 472 NFSERR_NOTSUPP, 473 NFSERR_TOOSMALL, 474 NFSERR_SERVERFAULT, 475 0, 476}; 477 478static short nfsv3err_fsstat[] = { 479 NFSERR_IO, 480 NFSERR_IO, 481 NFSERR_STALE, 482 NFSERR_BADHANDLE, 483 NFSERR_SERVERFAULT, 484 0, 485}; 486 487static short nfsv3err_fsinfo[] = { 488 NFSERR_STALE, 489 NFSERR_STALE, 490 NFSERR_BADHANDLE, 491 NFSERR_SERVERFAULT, 492 0, 493}; 494 495static short nfsv3err_pathconf[] = { 496 NFSERR_STALE, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501}; 502 503static short nfsv3err_commit[] = { 504 NFSERR_IO, 505 NFSERR_IO, 506 NFSERR_STALE, 507 NFSERR_BADHANDLE, 508 NFSERR_SERVERFAULT, 509 0, 510}; 511 512static short *nfsrv_v3errmap[] = { 513 nfsv3err_null, 514 nfsv3err_getattr, 515 nfsv3err_setattr, 516 nfsv3err_lookup, 517 nfsv3err_access, 518 nfsv3err_readlink, 519 nfsv3err_read, 520 nfsv3err_write, 521 nfsv3err_create, 522 nfsv3err_mkdir, 523 nfsv3err_symlink, 524 nfsv3err_mknod, 525 nfsv3err_remove, 526 nfsv3err_rmdir, 527 nfsv3err_rename, 528 nfsv3err_link, 529 nfsv3err_readdir, 530 nfsv3err_readdirplus, 531 nfsv3err_fsstat, 532 nfsv3err_fsinfo, 533 nfsv3err_pathconf, 534 nfsv3err_commit, 535}; 536 537#endif /* NFS_NOSERVER */ 538 539extern struct nfsrtt nfsrtt; 540extern time_t nqnfsstarttime; 541extern int nqsrv_clockskew; 542extern int nqsrv_writeslack; 543extern int nqsrv_maxlease; 544extern struct nfsstats nfsstats; 545extern int nqnfs_piggy[NFS_NPROCS]; 546extern nfstype nfsv2_type[9]; 547extern nfstype nfsv3_type[9]; 548extern struct nfsnodehashhead *nfsnodehashtbl; 549extern u_long nfsnodehash; 550 551struct getfh_args; 552extern int getfh(struct proc *, struct getfh_args *, int *); 553struct nfssvc_args; 554extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 555 556LIST_HEAD(nfsnodehashhead, nfsnode); 557 558int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 559 560/* 561 * Create the header for an rpc request packet 562 * The hsiz is the size of the rest of the nfs request header. 563 * (just used to decide if a cluster is a good idea) 564 */ 565struct mbuf * 566nfsm_reqh(vp, procid, hsiz, bposp) 567 struct vnode *vp; 568 u_long procid; 569 int hsiz; 570 caddr_t *bposp; 571{ 572 register struct mbuf *mb; 573 register u_long *tl; 574 register caddr_t bpos; 575 struct mbuf *mb2; 576 struct nfsmount *nmp; 577 int nqflag; 578 579 MGET(mb, M_WAIT, MT_DATA); 580 if (hsiz >= MINCLSIZE) 581 MCLGET(mb, M_WAIT); 582 mb->m_len = 0; 583 bpos = mtod(mb, caddr_t); 584 585 /* 586 * For NQNFS, add lease request. 587 */ 588 if (vp) { 589 nmp = VFSTONFS(vp->v_mount); 590 if (nmp->nm_flag & NFSMNT_NQNFS) { 591 nqflag = NQNFS_NEEDLEASE(vp, procid); 592 if (nqflag) { 593 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 594 *tl++ = txdr_unsigned(nqflag); 595 *tl = txdr_unsigned(nmp->nm_leaseterm); 596 } else { 597 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 598 *tl = 0; 599 } 600 } 601 } 602 /* Finally, return values */ 603 *bposp = bpos; 604 return (mb); 605} 606 607/* 608 * Build the RPC header and fill in the authorization info. 609 * The authorization string argument is only used when the credentials 610 * come from outside of the kernel. 611 * Returns the head of the mbuf list. 612 */ 613struct mbuf * 614nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 615 verf_str, mrest, mrest_len, mbp, xidp) 616 register struct ucred *cr; 617 int nmflag; 618 int procid; 619 int auth_type; 620 int auth_len; 621 char *auth_str; 622 int verf_len; 623 char *verf_str; 624 struct mbuf *mrest; 625 int mrest_len; 626 struct mbuf **mbp; 627 u_long *xidp; 628{ 629 register struct mbuf *mb; 630 register u_long *tl; 631 register caddr_t bpos; 632 register int i; 633 struct mbuf *mreq, *mb2; 634 int siz, grpsiz, authsiz; 635 struct timeval tv; 636 static u_long base; 637 638 authsiz = nfsm_rndup(auth_len); 639 MGETHDR(mb, M_WAIT, MT_DATA); 640 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 641 MCLGET(mb, M_WAIT); 642 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 643 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 644 } else { 645 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 646 } 647 mb->m_len = 0; 648 mreq = mb; 649 bpos = mtod(mb, caddr_t); 650 651 /* 652 * First the RPC header. 653 */ 654 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 655 656 /* 657 * derive initial xid from system time 658 * XXX time is invalid if root not yet mounted 659 */ 660 if (!base && (rootvp)) { 661 microtime(&tv); 662 base = tv.tv_sec << 12; 663 nfs_xid = base; 664 } 665 /* 666 * Skip zero xid if it should ever happen. 667 */ 668 if (++nfs_xid == 0) 669 nfs_xid++; 670 671 *tl++ = *xidp = txdr_unsigned(nfs_xid); 672 *tl++ = rpc_call; 673 *tl++ = rpc_vers; 674 if (nmflag & NFSMNT_NQNFS) { 675 *tl++ = txdr_unsigned(NQNFS_PROG); 676 *tl++ = txdr_unsigned(NQNFS_VER3); 677 } else { 678 *tl++ = txdr_unsigned(NFS_PROG); 679 if (nmflag & NFSMNT_NFSV3) 680 *tl++ = txdr_unsigned(NFS_VER3); 681 else 682 *tl++ = txdr_unsigned(NFS_VER2); 683 } 684 if (nmflag & NFSMNT_NFSV3) 685 *tl++ = txdr_unsigned(procid); 686 else 687 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 688 689 /* 690 * And then the authorization cred. 691 */ 692 *tl++ = txdr_unsigned(auth_type); 693 *tl = txdr_unsigned(authsiz); 694 switch (auth_type) { 695 case RPCAUTH_UNIX: 696 nfsm_build(tl, u_long *, auth_len); 697 *tl++ = 0; /* stamp ?? */ 698 *tl++ = 0; /* NULL hostname */ 699 *tl++ = txdr_unsigned(cr->cr_uid); 700 *tl++ = txdr_unsigned(cr->cr_groups[0]); 701 grpsiz = (auth_len >> 2) - 5; 702 *tl++ = txdr_unsigned(grpsiz); 703 for (i = 1; i <= grpsiz; i++) 704 *tl++ = txdr_unsigned(cr->cr_groups[i]); 705 break; 706 case RPCAUTH_KERB4: 707 siz = auth_len; 708 while (siz > 0) { 709 if (M_TRAILINGSPACE(mb) == 0) { 710 MGET(mb2, M_WAIT, MT_DATA); 711 if (siz >= MINCLSIZE) 712 MCLGET(mb2, M_WAIT); 713 mb->m_next = mb2; 714 mb = mb2; 715 mb->m_len = 0; 716 bpos = mtod(mb, caddr_t); 717 } 718 i = min(siz, M_TRAILINGSPACE(mb)); 719 bcopy(auth_str, bpos, i); 720 mb->m_len += i; 721 auth_str += i; 722 bpos += i; 723 siz -= i; 724 } 725 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 726 for (i = 0; i < siz; i++) 727 *bpos++ = '\0'; 728 mb->m_len += siz; 729 } 730 break; 731 }; 732 733 /* 734 * And the verifier... 735 */ 736 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 737 if (verf_str) { 738 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 739 *tl = txdr_unsigned(verf_len); 740 siz = verf_len; 741 while (siz > 0) { 742 if (M_TRAILINGSPACE(mb) == 0) { 743 MGET(mb2, M_WAIT, MT_DATA); 744 if (siz >= MINCLSIZE) 745 MCLGET(mb2, M_WAIT); 746 mb->m_next = mb2; 747 mb = mb2; 748 mb->m_len = 0; 749 bpos = mtod(mb, caddr_t); 750 } 751 i = min(siz, M_TRAILINGSPACE(mb)); 752 bcopy(verf_str, bpos, i); 753 mb->m_len += i; 754 verf_str += i; 755 bpos += i; 756 siz -= i; 757 } 758 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 759 for (i = 0; i < siz; i++) 760 *bpos++ = '\0'; 761 mb->m_len += siz; 762 } 763 } else { 764 *tl++ = txdr_unsigned(RPCAUTH_NULL); 765 *tl = 0; 766 } 767 mb->m_next = mrest; 768 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 769 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 770 *mbp = mb; 771 return (mreq); 772} 773 774/* 775 * copies mbuf chain to the uio scatter/gather list 776 */ 777int 778nfsm_mbuftouio(mrep, uiop, siz, dpos) 779 struct mbuf **mrep; 780 register struct uio *uiop; 781 int siz; 782 caddr_t *dpos; 783{ 784 register char *mbufcp, *uiocp; 785 register int xfer, left, len; 786 register struct mbuf *mp; 787 long uiosiz, rem; 788 int error = 0; 789 790 mp = *mrep; 791 mbufcp = *dpos; 792 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 793 rem = nfsm_rndup(siz)-siz; 794 while (siz > 0) { 795 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 796 return (EFBIG); 797 left = uiop->uio_iov->iov_len; 798 uiocp = uiop->uio_iov->iov_base; 799 if (left > siz) 800 left = siz; 801 uiosiz = left; 802 while (left > 0) { 803 while (len == 0) { 804 mp = mp->m_next; 805 if (mp == NULL) 806 return (EBADRPC); 807 mbufcp = mtod(mp, caddr_t); 808 len = mp->m_len; 809 } 810 xfer = (left > len) ? len : left; 811#ifdef notdef 812 /* Not Yet.. */ 813 if (uiop->uio_iov->iov_op != NULL) 814 (*(uiop->uio_iov->iov_op)) 815 (mbufcp, uiocp, xfer); 816 else 817#endif 818 if (uiop->uio_segflg == UIO_SYSSPACE) 819 bcopy(mbufcp, uiocp, xfer); 820 else 821 copyout(mbufcp, uiocp, xfer); 822 left -= xfer; 823 len -= xfer; 824 mbufcp += xfer; 825 uiocp += xfer; 826 uiop->uio_offset += xfer; 827 uiop->uio_resid -= xfer; 828 } 829 if (uiop->uio_iov->iov_len <= siz) { 830 uiop->uio_iovcnt--; 831 uiop->uio_iov++; 832 } else { 833 uiop->uio_iov->iov_base += uiosiz; 834 uiop->uio_iov->iov_len -= uiosiz; 835 } 836 siz -= uiosiz; 837 } 838 *dpos = mbufcp; 839 *mrep = mp; 840 if (rem > 0) { 841 if (len < rem) 842 error = nfs_adv(mrep, dpos, rem, len); 843 else 844 *dpos += rem; 845 } 846 return (error); 847} 848 849/* 850 * copies a uio scatter/gather list to an mbuf chain. 851 * NOTE: can ony handle iovcnt == 1 852 */ 853int 854nfsm_uiotombuf(uiop, mq, siz, bpos) 855 register struct uio *uiop; 856 struct mbuf **mq; 857 int siz; 858 caddr_t *bpos; 859{ 860 register char *uiocp; 861 register struct mbuf *mp, *mp2; 862 register int xfer, left, mlen; 863 int uiosiz, clflg, rem; 864 char *cp; 865 866 if (uiop->uio_iovcnt != 1) 867 panic("nfsm_uiotombuf: iovcnt != 1"); 868 869 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 870 clflg = 1; 871 else 872 clflg = 0; 873 rem = nfsm_rndup(siz)-siz; 874 mp = mp2 = *mq; 875 while (siz > 0) { 876 left = uiop->uio_iov->iov_len; 877 uiocp = uiop->uio_iov->iov_base; 878 if (left > siz) 879 left = siz; 880 uiosiz = left; 881 while (left > 0) { 882 mlen = M_TRAILINGSPACE(mp); 883 if (mlen == 0) { 884 MGET(mp, M_WAIT, MT_DATA); 885 if (clflg) 886 MCLGET(mp, M_WAIT); 887 mp->m_len = 0; 888 mp2->m_next = mp; 889 mp2 = mp; 890 mlen = M_TRAILINGSPACE(mp); 891 } 892 xfer = (left > mlen) ? mlen : left; 893#ifdef notdef 894 /* Not Yet.. */ 895 if (uiop->uio_iov->iov_op != NULL) 896 (*(uiop->uio_iov->iov_op)) 897 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 898 else 899#endif 900 if (uiop->uio_segflg == UIO_SYSSPACE) 901 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 902 else 903 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 904 mp->m_len += xfer; 905 left -= xfer; 906 uiocp += xfer; 907 uiop->uio_offset += xfer; 908 uiop->uio_resid -= xfer; 909 } 910 uiop->uio_iov->iov_base += uiosiz; 911 uiop->uio_iov->iov_len -= uiosiz; 912 siz -= uiosiz; 913 } 914 if (rem > 0) { 915 if (rem > M_TRAILINGSPACE(mp)) { 916 MGET(mp, M_WAIT, MT_DATA); 917 mp->m_len = 0; 918 mp2->m_next = mp; 919 } 920 cp = mtod(mp, caddr_t)+mp->m_len; 921 for (left = 0; left < rem; left++) 922 *cp++ = '\0'; 923 mp->m_len += rem; 924 *bpos = cp; 925 } else 926 *bpos = mtod(mp, caddr_t)+mp->m_len; 927 *mq = mp; 928 return (0); 929} 930 931/* 932 * Help break down an mbuf chain by setting the first siz bytes contiguous 933 * pointed to by returned val. 934 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 935 * cases. (The macros use the vars. dpos and dpos2) 936 */ 937int 938nfsm_disct(mdp, dposp, siz, left, cp2) 939 struct mbuf **mdp; 940 caddr_t *dposp; 941 int siz; 942 int left; 943 caddr_t *cp2; 944{ 945 register struct mbuf *mp, *mp2; 946 register int siz2, xfer; 947 register caddr_t p; 948 949 mp = *mdp; 950 while (left == 0) { 951 *mdp = mp = mp->m_next; 952 if (mp == NULL) 953 return (EBADRPC); 954 left = mp->m_len; 955 *dposp = mtod(mp, caddr_t); 956 } 957 if (left >= siz) { 958 *cp2 = *dposp; 959 *dposp += siz; 960 } else if (mp->m_next == NULL) { 961 return (EBADRPC); 962 } else if (siz > MHLEN) { 963 panic("nfs S too big"); 964 } else { 965 MGET(mp2, M_WAIT, MT_DATA); 966 mp2->m_next = mp->m_next; 967 mp->m_next = mp2; 968 mp->m_len -= left; 969 mp = mp2; 970 *cp2 = p = mtod(mp, caddr_t); 971 bcopy(*dposp, p, left); /* Copy what was left */ 972 siz2 = siz-left; 973 p += left; 974 mp2 = mp->m_next; 975 /* Loop around copying up the siz2 bytes */ 976 while (siz2 > 0) { 977 if (mp2 == NULL) 978 return (EBADRPC); 979 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 980 if (xfer > 0) { 981 bcopy(mtod(mp2, caddr_t), p, xfer); 982 NFSMADV(mp2, xfer); 983 mp2->m_len -= xfer; 984 p += xfer; 985 siz2 -= xfer; 986 } 987 if (siz2 > 0) 988 mp2 = mp2->m_next; 989 } 990 mp->m_len = siz; 991 *mdp = mp2; 992 *dposp = mtod(mp2, caddr_t); 993 } 994 return (0); 995} 996 997/* 998 * Advance the position in the mbuf chain. 999 */ 1000int 1001nfs_adv(mdp, dposp, offs, left) 1002 struct mbuf **mdp; 1003 caddr_t *dposp; 1004 int offs; 1005 int left; 1006{ 1007 register struct mbuf *m; 1008 register int s; 1009 1010 m = *mdp; 1011 s = left; 1012 while (s < offs) { 1013 offs -= s; 1014 m = m->m_next; 1015 if (m == NULL) 1016 return (EBADRPC); 1017 s = m->m_len; 1018 } 1019 *mdp = m; 1020 *dposp = mtod(m, caddr_t)+offs; 1021 return (0); 1022} 1023 1024/* 1025 * Copy a string into mbufs for the hard cases... 1026 */ 1027int 1028nfsm_strtmbuf(mb, bpos, cp, siz) 1029 struct mbuf **mb; 1030 char **bpos; 1031 char *cp; 1032 long siz; 1033{ 1034 register struct mbuf *m1 = 0, *m2; 1035 long left, xfer, len, tlen; 1036 u_long *tl; 1037 int putsize; 1038 1039 putsize = 1; 1040 m2 = *mb; 1041 left = M_TRAILINGSPACE(m2); 1042 if (left > 0) { 1043 tl = ((u_long *)(*bpos)); 1044 *tl++ = txdr_unsigned(siz); 1045 putsize = 0; 1046 left -= NFSX_UNSIGNED; 1047 m2->m_len += NFSX_UNSIGNED; 1048 if (left > 0) { 1049 bcopy(cp, (caddr_t) tl, left); 1050 siz -= left; 1051 cp += left; 1052 m2->m_len += left; 1053 left = 0; 1054 } 1055 } 1056 /* Loop around adding mbufs */ 1057 while (siz > 0) { 1058 MGET(m1, M_WAIT, MT_DATA); 1059 if (siz > MLEN) 1060 MCLGET(m1, M_WAIT); 1061 m1->m_len = NFSMSIZ(m1); 1062 m2->m_next = m1; 1063 m2 = m1; 1064 tl = mtod(m1, u_long *); 1065 tlen = 0; 1066 if (putsize) { 1067 *tl++ = txdr_unsigned(siz); 1068 m1->m_len -= NFSX_UNSIGNED; 1069 tlen = NFSX_UNSIGNED; 1070 putsize = 0; 1071 } 1072 if (siz < m1->m_len) { 1073 len = nfsm_rndup(siz); 1074 xfer = siz; 1075 if (xfer < len) 1076 *(tl+(xfer>>2)) = 0; 1077 } else { 1078 xfer = len = m1->m_len; 1079 } 1080 bcopy(cp, (caddr_t) tl, xfer); 1081 m1->m_len = len+tlen; 1082 siz -= xfer; 1083 cp += xfer; 1084 } 1085 *mb = m1; 1086 *bpos = mtod(m1, caddr_t)+m1->m_len; 1087 return (0); 1088} 1089 1090/* 1091 * Called once to initialize data structures... 1092 */ 1093int 1094nfs_init(vfsp) 1095 struct vfsconf *vfsp; 1096{ 1097 register int i; 1098 1099 /* 1100 * Check to see if major data structures haven't bloated. 1101 */ 1102 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1103 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1104 printf("Try reducing NFS_SMALLFH\n"); 1105 } 1106 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1107 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1108 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1109 } 1110 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1111 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1112 printf("Try reducing NFS_UIDHASHSIZ\n"); 1113 } 1114 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1115 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1116 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1117 } 1118 nfs_mount_type = vfsp->vfc_typenum; 1119 nfsrtt.pos = 0; 1120 rpc_vers = txdr_unsigned(RPC_VER2); 1121 rpc_call = txdr_unsigned(RPC_CALL); 1122 rpc_reply = txdr_unsigned(RPC_REPLY); 1123 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1124 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1125 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1126 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1127 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1128 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1129 nfs_prog = txdr_unsigned(NFS_PROG); 1130 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1131 nfs_true = txdr_unsigned(TRUE); 1132 nfs_false = txdr_unsigned(FALSE); 1133 nfs_xdrneg1 = txdr_unsigned(-1); 1134 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1135 if (nfs_ticks < 1) 1136 nfs_ticks = 1; 1137 /* Ensure async daemons disabled */ 1138 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1139 nfs_iodwant[i] = (struct proc *)0; 1140 nfs_iodmount[i] = (struct nfsmount *)0; 1141 } 1142 nfs_nhinit(); /* Init the nfsnode table */ 1143#ifndef NFS_NOSERVER 1144 nfsrv_init(0); /* Init server data structures */ 1145 nfsrv_initcache(); /* Init the server request cache */ 1146#endif 1147 1148 /* 1149 * Initialize the nqnfs server stuff. 1150 */ 1151 if (nqnfsstarttime == 0) { 1152 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1153 + nqsrv_clockskew + nqsrv_writeslack; 1154 NQLOADNOVRAM(nqnfsstarttime); 1155 CIRCLEQ_INIT(&nqtimerhead); 1156 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1157 } 1158 1159 /* 1160 * Initialize reply list and start timer 1161 */ 1162 TAILQ_INIT(&nfs_reqq); 1163 1164 nfs_timer(0); 1165 1166 1167 /* 1168 * Set up lease_check and lease_updatetime so that other parts 1169 * of the system can call us, if we are loadable. 1170 */ 1171#ifndef NFS_NOSERVER 1172 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1173#endif 1174 lease_updatetime = nfs_lease_updatetime; 1175 vfsp->vfc_refcount++; /* make us non-unloadable */ 1176 sysent[SYS_nfssvc].sy_narg = 2; 1177 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1178#ifndef NFS_NOSERVER 1179 sysent[SYS_getfh].sy_narg = 2; 1180 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1181#endif 1182 1183 return (0); 1184} 1185 1186/* 1187 * Attribute cache routines. 1188 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1189 * that are on the mbuf list 1190 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1191 * error otherwise 1192 */ 1193 1194/* 1195 * Load the attribute cache (that lives in the nfsnode entry) with 1196 * the values on the mbuf list and 1197 * Iff vap not NULL 1198 * copy the attributes to *vaper 1199 */ 1200int 1201nfs_loadattrcache(vpp, mdp, dposp, vaper) 1202 struct vnode **vpp; 1203 struct mbuf **mdp; 1204 caddr_t *dposp; 1205 struct vattr *vaper; 1206{ 1207 register struct vnode *vp = *vpp; 1208 register struct vattr *vap; 1209 register struct nfs_fattr *fp; 1210 register struct nfsnode *np; 1211 register long t1; 1212 caddr_t cp2; 1213 int error = 0, rdev; 1214 struct mbuf *md; 1215 enum vtype vtyp; 1216 u_short vmode; 1217 struct timespec mtime; 1218 struct vnode *nvp; 1219 int v3 = NFS_ISV3(vp); 1220 1221 md = *mdp; 1222 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1223 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1224 return (error); 1225 fp = (struct nfs_fattr *)cp2; 1226 if (v3) { 1227 vtyp = nfsv3tov_type(fp->fa_type); 1228 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1229 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1230 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1231 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1232 } else { 1233 vtyp = nfsv2tov_type(fp->fa_type); 1234 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1235 /* 1236 * XXX 1237 * 1238 * The duplicate information returned in fa_type and fa_mode 1239 * is an ambiguity in the NFS version 2 protocol. 1240 * 1241 * VREG should be taken literally as a regular file. If a 1242 * server intents to return some type information differently 1243 * in the upper bits of the mode field (e.g. for sockets, or 1244 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1245 * leave the examination of the mode bits even in the VREG 1246 * case to avoid breakage for bogus servers, but we make sure 1247 * that there are actually type bits set in the upper part of 1248 * fa_mode (and failing that, trust the va_type field). 1249 * 1250 * NFSv3 cleared the issue, and requires fa_mode to not 1251 * contain any type information (while also introduing sockets 1252 * and FIFOs for fa_type). 1253 */ 1254 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1255 vtyp = IFTOVT(vmode); 1256 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1257 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1258 1259 /* 1260 * Really ugly NFSv2 kludge. 1261 */ 1262 if (vtyp == VCHR && rdev == 0xffffffff) 1263 vtyp = VFIFO; 1264 } 1265 1266 /* 1267 * If v_type == VNON it is a new node, so fill in the v_type, 1268 * n_mtime fields. Check to see if it represents a special 1269 * device, and if so, check for a possible alias. Once the 1270 * correct vnode has been obtained, fill in the rest of the 1271 * information. 1272 */ 1273 np = VTONFS(vp); 1274 if (vp->v_type != vtyp) { 1275 vp->v_type = vtyp; 1276 if (vp->v_type == VFIFO) { 1277 vp->v_op = fifo_nfsv2nodeop_p; 1278 } 1279 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1280 vp->v_op = spec_nfsv2nodeop_p; 1281 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1282 if (nvp) { 1283 /* 1284 * Discard unneeded vnode, but save its nfsnode. 1285 * Since the nfsnode does not have a lock, its 1286 * vnode lock has to be carried over. 1287 */ 1288 nvp->v_vnlock = vp->v_vnlock; 1289 vp->v_vnlock = NULL; 1290 nvp->v_data = vp->v_data; 1291 vp->v_data = NULL; 1292 vp->v_op = spec_vnodeop_p; 1293 vrele(vp); 1294 vgone(vp); 1295 /* 1296 * Reinitialize aliased node. 1297 */ 1298 np->n_vnode = nvp; 1299 *vpp = vp = nvp; 1300 } 1301 } 1302 np->n_mtime = mtime.tv_sec; 1303 } 1304 vap = &np->n_vattr; 1305 vap->va_type = vtyp; 1306 vap->va_mode = (vmode & 07777); 1307 vap->va_rdev = (dev_t)rdev; 1308 vap->va_mtime = mtime; 1309 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1310 if (v3) { 1311 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1312 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1313 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1314 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1315 vap->va_blocksize = NFS_FABLKSIZE; 1316 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1317 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1318 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1319 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1320 vap->va_flags = 0; 1321 vap->va_filerev = 0; 1322 } else { 1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1326 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1327 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1328 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1329 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1330 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1331 vap->va_flags = 0; 1332 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1333 vap->va_ctime.tv_nsec = 0; 1334 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1335 vap->va_filerev = 0; 1336 } 1337 if (vap->va_size != np->n_size) { 1338 if (vap->va_type == VREG) { 1339 if (np->n_flag & NMODIFIED) { 1340 if (vap->va_size < np->n_size) 1341 vap->va_size = np->n_size; 1342 else 1343 np->n_size = vap->va_size; 1344 } else 1345 np->n_size = vap->va_size; 1346 vnode_pager_setsize(vp, (u_long)np->n_size); 1347 } else 1348 np->n_size = vap->va_size; 1349 } 1350 np->n_attrstamp = time.tv_sec; 1351 if (vaper != NULL) { 1352 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1353 if (np->n_flag & NCHG) { 1354 if (np->n_flag & NACC) 1355 vaper->va_atime = np->n_atim; 1356 if (np->n_flag & NUPD) 1357 vaper->va_mtime = np->n_mtim; 1358 } 1359 } 1360 return (0); 1361} 1362 1363/* 1364 * Check the time stamp 1365 * If the cache is valid, copy contents to *vap and return 0 1366 * otherwise return an error 1367 */ 1368int 1369nfs_getattrcache(vp, vaper) 1370 register struct vnode *vp; 1371 struct vattr *vaper; 1372{ 1373 register struct nfsnode *np = VTONFS(vp); 1374 register struct vattr *vap; 1375 1376 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1377 nfsstats.attrcache_misses++; 1378 return (ENOENT); 1379 } 1380 nfsstats.attrcache_hits++; 1381 vap = &np->n_vattr; 1382 if (vap->va_size != np->n_size) { 1383 if (vap->va_type == VREG) { 1384 if (np->n_flag & NMODIFIED) { 1385 if (vap->va_size < np->n_size) 1386 vap->va_size = np->n_size; 1387 else 1388 np->n_size = vap->va_size; 1389 } else 1390 np->n_size = vap->va_size; 1391 vnode_pager_setsize(vp, (u_long)np->n_size); 1392 } else 1393 np->n_size = vap->va_size; 1394 } 1395 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1396 if (np->n_flag & NCHG) { 1397 if (np->n_flag & NACC) 1398 vaper->va_atime = np->n_atim; 1399 if (np->n_flag & NUPD) 1400 vaper->va_mtime = np->n_mtim; 1401 } 1402 return (0); 1403} 1404 1405#ifndef NFS_NOSERVER 1406/* 1407 * Set up nameidata for a lookup() call and do it. 1408 * 1409 * If pubflag is set, this call is done for a lookup operation on the 1410 * public filehandle. In that case we allow crossing mountpoints and 1411 * absolute pathnames. However, the caller is expected to check that 1412 * the lookup result is within the public fs, and deny access if 1413 * it is not. 1414 */ 1415int 1416nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1417 register struct nameidata *ndp; 1418 fhandle_t *fhp; 1419 int len; 1420 struct nfssvc_sock *slp; 1421 struct sockaddr *nam; 1422 struct mbuf **mdp; 1423 caddr_t *dposp; 1424 struct vnode **retdirp; 1425 struct proc *p; 1426 int kerbflag, pubflag; 1427{ 1428 register int i, rem; 1429 register struct mbuf *md; 1430 register char *fromcp, *tocp, *cp; 1431 struct iovec aiov; 1432 struct uio auio; 1433 struct vnode *dp; 1434 int error, rdonly, linklen; 1435 struct componentname *cnp = &ndp->ni_cnd; 1436 1437 *retdirp = (struct vnode *)0; 1438 cnp->cn_pnbuf = zalloc(namei_zone); 1439 1440 /* 1441 * Copy the name from the mbuf list to ndp->ni_pnbuf 1442 * and set the various ndp fields appropriately. 1443 */ 1444 fromcp = *dposp; 1445 tocp = cnp->cn_pnbuf; 1446 md = *mdp; 1447 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1448 cnp->cn_hash = 0; 1449 for (i = 0; i < len; i++) { 1450 while (rem == 0) { 1451 md = md->m_next; 1452 if (md == NULL) { 1453 error = EBADRPC; 1454 goto out; 1455 } 1456 fromcp = mtod(md, caddr_t); 1457 rem = md->m_len; 1458 } 1459 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1460 error = EACCES; 1461 goto out; 1462 } 1463 cnp->cn_hash += (unsigned char)*fromcp; 1464 *tocp++ = *fromcp++; 1465 rem--; 1466 } 1467 *tocp = '\0'; 1468 *mdp = md; 1469 *dposp = fromcp; 1470 len = nfsm_rndup(len)-len; 1471 if (len > 0) { 1472 if (rem >= len) 1473 *dposp += len; 1474 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1475 goto out; 1476 } 1477 1478 /* 1479 * Extract and set starting directory. 1480 */ 1481 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1482 nam, &rdonly, kerbflag, pubflag); 1483 if (error) 1484 goto out; 1485 if (dp->v_type != VDIR) { 1486 vrele(dp); 1487 error = ENOTDIR; 1488 goto out; 1489 } 1490 1491 if (rdonly) 1492 cnp->cn_flags |= RDONLY; 1493 1494 *retdirp = dp; 1495 1496 if (pubflag) { 1497 /* 1498 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1499 * and the 'native path' indicator. 1500 */ 1501 cp = zalloc(namei_zone); 1502 fromcp = cnp->cn_pnbuf; 1503 tocp = cp; 1504 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1505 switch ((unsigned char)*fromcp) { 1506 case WEBNFS_NATIVE_CHAR: 1507 /* 1508 * 'Native' path for us is the same 1509 * as a path according to the NFS spec, 1510 * just skip the escape char. 1511 */ 1512 fromcp++; 1513 break; 1514 /* 1515 * More may be added in the future, range 0x80-0xff 1516 */ 1517 default: 1518 error = EIO; 1519 zfree(namei_zone, cp); 1520 goto out; 1521 } 1522 } 1523 /* 1524 * Translate the '%' escapes, URL-style. 1525 */ 1526 while (*fromcp != '\0') { 1527 if (*fromcp == WEBNFS_ESC_CHAR) { 1528 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1529 fromcp++; 1530 *tocp++ = HEXSTRTOI(fromcp); 1531 fromcp += 2; 1532 continue; 1533 } else { 1534 error = ENOENT; 1535 zfree(namei_zone, cp); 1536 goto out; 1537 } 1538 } else 1539 *tocp++ = *fromcp++; 1540 } 1541 *tocp = '\0'; 1542 zfree(namei_zone, cnp->cn_pnbuf); 1543 cnp->cn_pnbuf = cp; 1544 } 1545 1546 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1547 ndp->ni_segflg = UIO_SYSSPACE; 1548 1549 if (pubflag) { 1550 ndp->ni_rootdir = rootvnode; 1551 ndp->ni_loopcnt = 0; 1552 if (cnp->cn_pnbuf[0] == '/') 1553 dp = rootvnode; 1554 } else { 1555 cnp->cn_flags |= NOCROSSMOUNT; 1556 } 1557 1558 cnp->cn_proc = p; 1559 VREF(dp); 1560 1561 for (;;) { 1562 cnp->cn_nameptr = cnp->cn_pnbuf; 1563 ndp->ni_startdir = dp; 1564 /* 1565 * And call lookup() to do the real work 1566 */ 1567 error = lookup(ndp); 1568 if (error) 1569 break; 1570 /* 1571 * Check for encountering a symbolic link 1572 */ 1573 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1574 nfsrv_object_create(ndp->ni_vp); 1575 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1576 cnp->cn_flags |= HASBUF; 1577 return (0); 1578 } 1579 break; 1580 } else { 1581 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1582 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1583 if (!pubflag) { 1584 vrele(ndp->ni_dvp); 1585 vput(ndp->ni_vp); 1586 ndp->ni_vp = NULL; 1587 error = EINVAL; 1588 break; 1589 } 1590 1591 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1592 error = ELOOP; 1593 break; 1594 } 1595 if (ndp->ni_pathlen > 1) 1596 cp = zalloc(namei_zone); 1597 else 1598 cp = cnp->cn_pnbuf; 1599 aiov.iov_base = cp; 1600 aiov.iov_len = MAXPATHLEN; 1601 auio.uio_iov = &aiov; 1602 auio.uio_iovcnt = 1; 1603 auio.uio_offset = 0; 1604 auio.uio_rw = UIO_READ; 1605 auio.uio_segflg = UIO_SYSSPACE; 1606 auio.uio_procp = (struct proc *)0; 1607 auio.uio_resid = MAXPATHLEN; 1608 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1609 if (error) { 1610 badlink: 1611 if (ndp->ni_pathlen > 1) 1612 zfree(namei_zone, cp); 1613 break; 1614 } 1615 linklen = MAXPATHLEN - auio.uio_resid; 1616 if (linklen == 0) { 1617 error = ENOENT; 1618 goto badlink; 1619 } 1620 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1621 error = ENAMETOOLONG; 1622 goto badlink; 1623 } 1624 if (ndp->ni_pathlen > 1) { 1625 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1626 zfree(namei_zone, cnp->cn_pnbuf); 1627 cnp->cn_pnbuf = cp; 1628 } else 1629 cnp->cn_pnbuf[linklen] = '\0'; 1630 ndp->ni_pathlen += linklen; 1631 vput(ndp->ni_vp); 1632 dp = ndp->ni_dvp; 1633 /* 1634 * Check if root directory should replace current directory. 1635 */ 1636 if (cnp->cn_pnbuf[0] == '/') { 1637 vrele(dp); 1638 dp = ndp->ni_rootdir; 1639 VREF(dp); 1640 } 1641 } 1642 } 1643out: 1644 zfree(namei_zone, cnp->cn_pnbuf); 1645 return (error); 1646} 1647 1648/* 1649 * A fiddled version of m_adj() that ensures null fill to a long 1650 * boundary and only trims off the back end 1651 */ 1652void 1653nfsm_adj(mp, len, nul) 1654 struct mbuf *mp; 1655 register int len; 1656 int nul; 1657{ 1658 register struct mbuf *m; 1659 register int count, i; 1660 register char *cp; 1661 1662 /* 1663 * Trim from tail. Scan the mbuf chain, 1664 * calculating its length and finding the last mbuf. 1665 * If the adjustment only affects this mbuf, then just 1666 * adjust and return. Otherwise, rescan and truncate 1667 * after the remaining size. 1668 */ 1669 count = 0; 1670 m = mp; 1671 for (;;) { 1672 count += m->m_len; 1673 if (m->m_next == (struct mbuf *)0) 1674 break; 1675 m = m->m_next; 1676 } 1677 if (m->m_len > len) { 1678 m->m_len -= len; 1679 if (nul > 0) { 1680 cp = mtod(m, caddr_t)+m->m_len-nul; 1681 for (i = 0; i < nul; i++) 1682 *cp++ = '\0'; 1683 } 1684 return; 1685 } 1686 count -= len; 1687 if (count < 0) 1688 count = 0; 1689 /* 1690 * Correct length for chain is "count". 1691 * Find the mbuf with last data, adjust its length, 1692 * and toss data from remaining mbufs on chain. 1693 */ 1694 for (m = mp; m; m = m->m_next) { 1695 if (m->m_len >= count) { 1696 m->m_len = count; 1697 if (nul > 0) { 1698 cp = mtod(m, caddr_t)+m->m_len-nul; 1699 for (i = 0; i < nul; i++) 1700 *cp++ = '\0'; 1701 } 1702 break; 1703 } 1704 count -= m->m_len; 1705 } 1706 for (m = m->m_next;m;m = m->m_next) 1707 m->m_len = 0; 1708} 1709 1710/* 1711 * Make these functions instead of macros, so that the kernel text size 1712 * doesn't get too big... 1713 */ 1714void 1715nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1716 struct nfsrv_descript *nfsd; 1717 int before_ret; 1718 register struct vattr *before_vap; 1719 int after_ret; 1720 struct vattr *after_vap; 1721 struct mbuf **mbp; 1722 char **bposp; 1723{ 1724 register struct mbuf *mb = *mbp, *mb2; 1725 register char *bpos = *bposp; 1726 register u_long *tl; 1727 1728 if (before_ret) { 1729 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1730 *tl = nfs_false; 1731 } else { 1732 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1733 *tl++ = nfs_true; 1734 txdr_hyper(&(before_vap->va_size), tl); 1735 tl += 2; 1736 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1737 tl += 2; 1738 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1739 } 1740 *bposp = bpos; 1741 *mbp = mb; 1742 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1743} 1744 1745void 1746nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1747 struct nfsrv_descript *nfsd; 1748 int after_ret; 1749 struct vattr *after_vap; 1750 struct mbuf **mbp; 1751 char **bposp; 1752{ 1753 register struct mbuf *mb = *mbp, *mb2; 1754 register char *bpos = *bposp; 1755 register u_long *tl; 1756 register struct nfs_fattr *fp; 1757 1758 if (after_ret) { 1759 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1760 *tl = nfs_false; 1761 } else { 1762 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1763 *tl++ = nfs_true; 1764 fp = (struct nfs_fattr *)tl; 1765 nfsm_srvfattr(nfsd, after_vap, fp); 1766 } 1767 *mbp = mb; 1768 *bposp = bpos; 1769} 1770 1771void 1772nfsm_srvfattr(nfsd, vap, fp) 1773 register struct nfsrv_descript *nfsd; 1774 register struct vattr *vap; 1775 register struct nfs_fattr *fp; 1776{ 1777 1778 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1779 fp->fa_uid = txdr_unsigned(vap->va_uid); 1780 fp->fa_gid = txdr_unsigned(vap->va_gid); 1781 if (nfsd->nd_flag & ND_NFSV3) { 1782 fp->fa_type = vtonfsv3_type(vap->va_type); 1783 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1784 txdr_hyper(&vap->va_size, &fp->fa3_size); 1785 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1786 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1787 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1788 fp->fa3_fsid.nfsuquad[0] = 0; 1789 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1790 fp->fa3_fileid.nfsuquad[0] = 0; 1791 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1792 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1793 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1794 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1795 } else { 1796 fp->fa_type = vtonfsv2_type(vap->va_type); 1797 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1798 fp->fa2_size = txdr_unsigned(vap->va_size); 1799 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1800 if (vap->va_type == VFIFO) 1801 fp->fa2_rdev = 0xffffffff; 1802 else 1803 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1804 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1805 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1806 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1807 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1808 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1809 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1810 } 1811} 1812 1813/* 1814 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1815 * - look up fsid in mount list (if not found ret error) 1816 * - get vp and export rights by calling VFS_FHTOVP() 1817 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1818 * - if not lockflag unlock it with VOP_UNLOCK() 1819 */ 1820int 1821nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1822 fhandle_t *fhp; 1823 int lockflag; 1824 struct vnode **vpp; 1825 struct ucred *cred; 1826 struct nfssvc_sock *slp; 1827 struct sockaddr *nam; 1828 int *rdonlyp; 1829 int kerbflag; 1830 int pubflag; 1831{ 1832 struct proc *p = curproc; /* XXX */ 1833 register struct mount *mp; 1834 register int i; 1835 struct ucred *credanon; 1836 int error, exflags; 1837 1838 *vpp = (struct vnode *)0; 1839 1840 if (nfs_ispublicfh(fhp)) { 1841 if (!pubflag || !nfs_pub.np_valid) 1842 return (ESTALE); 1843 fhp = &nfs_pub.np_handle; 1844 } 1845 1846 mp = vfs_getvfs(&fhp->fh_fsid); 1847 if (!mp) 1848 return (ESTALE); 1849 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1850 if (error) 1851 return (error); 1852 /* 1853 * Check/setup credentials. 1854 */ 1855 if (exflags & MNT_EXKERB) { 1856 if (!kerbflag) { 1857 vput(*vpp); 1858 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1859 } 1860 } else if (kerbflag) { 1861 vput(*vpp); 1862 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1863 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1864 cred->cr_uid = credanon->cr_uid; 1865 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1866 cred->cr_groups[i] = credanon->cr_groups[i]; 1867 cred->cr_ngroups = i; 1868 } 1869 if (exflags & MNT_EXRDONLY) 1870 *rdonlyp = 1; 1871 else 1872 *rdonlyp = 0; 1873 1874 nfsrv_object_create(*vpp); 1875 1876 if (!lockflag) 1877 VOP_UNLOCK(*vpp, 0, p); 1878 return (0); 1879} 1880 1881 1882/* 1883 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1884 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1885 * transformed this to all zeroes in both cases, so check for it. 1886 */ 1887int 1888nfs_ispublicfh(fhp) 1889 fhandle_t *fhp; 1890{ 1891 char *cp = (char *)fhp; 1892 int i; 1893 1894 for (i = 0; i < NFSX_V3FH; i++) 1895 if (*cp++ != 0) 1896 return (FALSE); 1897 return (TRUE); 1898} 1899 1900#endif /* NFS_NOSERVER */ 1901/* 1902 * This function compares two net addresses by family and returns TRUE 1903 * if they are the same host. 1904 * If there is any doubt, return FALSE. 1905 * The AF_INET family is handled as a special case so that address mbufs 1906 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1907 */ 1908int 1909netaddr_match(family, haddr, nam) 1910 int family; 1911 union nethostaddr *haddr; 1912 struct sockaddr *nam; 1913{ 1914 register struct sockaddr_in *inetaddr; 1915 1916 switch (family) { 1917 case AF_INET: 1918 inetaddr = (struct sockaddr_in *)nam; 1919 if (inetaddr->sin_family == AF_INET && 1920 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1921 return (1); 1922 break; 1923#ifdef ISO 1924 case AF_ISO: 1925 { 1926 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1927 1928 isoaddr1 = (struct sockaddr_iso *)nam; 1929 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1930 if (isoaddr1->siso_family == AF_ISO && 1931 isoaddr1->siso_nlen > 0 && 1932 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1933 SAME_ISOADDR(isoaddr1, isoaddr2)) 1934 return (1); 1935 break; 1936 } 1937#endif /* ISO */ 1938 default: 1939 break; 1940 }; 1941 return (0); 1942} 1943 1944static nfsuint64 nfs_nullcookie = { 0, 0 }; 1945/* 1946 * This function finds the directory cookie that corresponds to the 1947 * logical byte offset given. 1948 */ 1949nfsuint64 * 1950nfs_getcookie(np, off, add) 1951 register struct nfsnode *np; 1952 off_t off; 1953 int add; 1954{ 1955 register struct nfsdmap *dp, *dp2; 1956 register int pos; 1957 1958 pos = off / NFS_DIRBLKSIZ; 1959 if (pos == 0) { 1960#ifdef DIAGNOSTIC 1961 if (add) 1962 panic("nfs getcookie add at 0"); 1963#endif 1964 return (&nfs_nullcookie); 1965 } 1966 pos--; 1967 dp = np->n_cookies.lh_first; 1968 if (!dp) { 1969 if (add) { 1970 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1971 M_NFSDIROFF, M_WAITOK); 1972 dp->ndm_eocookie = 0; 1973 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1974 } else 1975 return ((nfsuint64 *)0); 1976 } 1977 while (pos >= NFSNUMCOOKIES) { 1978 pos -= NFSNUMCOOKIES; 1979 if (dp->ndm_list.le_next) { 1980 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1981 pos >= dp->ndm_eocookie) 1982 return ((nfsuint64 *)0); 1983 dp = dp->ndm_list.le_next; 1984 } else if (add) { 1985 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1986 M_NFSDIROFF, M_WAITOK); 1987 dp2->ndm_eocookie = 0; 1988 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1989 dp = dp2; 1990 } else 1991 return ((nfsuint64 *)0); 1992 } 1993 if (pos >= dp->ndm_eocookie) { 1994 if (add) 1995 dp->ndm_eocookie = pos + 1; 1996 else 1997 return ((nfsuint64 *)0); 1998 } 1999 return (&dp->ndm_cookies[pos]); 2000} 2001 2002/* 2003 * Invalidate cached directory information, except for the actual directory 2004 * blocks (which are invalidated separately). 2005 * Done mainly to avoid the use of stale offset cookies. 2006 */ 2007void 2008nfs_invaldir(vp) 2009 register struct vnode *vp; 2010{ 2011 register struct nfsnode *np = VTONFS(vp); 2012 2013#ifdef DIAGNOSTIC 2014 if (vp->v_type != VDIR) 2015 panic("nfs: invaldir not dir"); 2016#endif 2017 np->n_direofoffset = 0; 2018 np->n_cookieverf.nfsuquad[0] = 0; 2019 np->n_cookieverf.nfsuquad[1] = 0; 2020 if (np->n_cookies.lh_first) 2021 np->n_cookies.lh_first->ndm_eocookie = 0; 2022} 2023 2024/* 2025 * The write verifier has changed (probably due to a server reboot), so all 2026 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2027 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2028 * flag. Once done the new write verifier can be set for the mount point. 2029 */ 2030void 2031nfs_clearcommit(mp) 2032 struct mount *mp; 2033{ 2034 register struct vnode *vp, *nvp; 2035 register struct buf *bp, *nbp; 2036 int s; 2037 2038 s = splbio(); 2039loop: 2040 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2041 if (vp->v_mount != mp) /* Paranoia */ 2042 goto loop; 2043 nvp = vp->v_mntvnodes.le_next; 2044 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2045 nbp = bp->b_vnbufs.le_next; 2046 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2047 == (B_DELWRI | B_NEEDCOMMIT)) 2048 bp->b_flags &= ~B_NEEDCOMMIT; 2049 } 2050 } 2051 splx(s); 2052} 2053 2054#ifndef NFS_NOSERVER 2055/* 2056 * Map errnos to NFS error numbers. For Version 3 also filter out error 2057 * numbers not specified for the associated procedure. 2058 */ 2059int 2060nfsrv_errmap(nd, err) 2061 struct nfsrv_descript *nd; 2062 register int err; 2063{ 2064 register short *defaulterrp, *errp; 2065 2066 if (nd->nd_flag & ND_NFSV3) { 2067 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2068 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2069 while (*++errp) { 2070 if (*errp == err) 2071 return (err); 2072 else if (*errp > err) 2073 break; 2074 } 2075 return ((int)*defaulterrp); 2076 } else 2077 return (err & 0xffff); 2078 } 2079 if (err <= ELAST) 2080 return ((int)nfsrv_v2errmap[err - 1]); 2081 return (NFSERR_IO); 2082} 2083 2084int 2085nfsrv_object_create(vp) 2086 struct vnode *vp; 2087{ 2088 2089 if (vp == NULL || vp->v_type != VREG) 2090 return (1); 2091 return (vfs_object_create(vp, curproc, 2092 curproc ? curproc->p_ucred : NULL, 1)); 2093} 2094#endif /* NFS_NOSERVER */ 2095