nfs_subs.c revision 41591
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 8.8 (Berkeley) 5/22/95 37 * $Id: nfs_subs.c,v 1.67 1998/11/09 07:00:14 peter Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/buf.h> 47#include <sys/proc.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/mount.h> 51#include <sys/vnode.h> 52#include <sys/namei.h> 53#include <sys/mbuf.h> 54#include <sys/socket.h> 55#include <sys/stat.h> 56#include <sys/malloc.h> 57#include <sys/sysent.h> 58#include <sys/syscall.h> 59 60#include <vm/vm.h> 61#include <vm/vm_object.h> 62#include <vm/vm_extern.h> 63#include <vm/vm_zone.h> 64 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <nfs/nfsnode.h> 69#include <nfs/xdr_subs.h> 70#include <nfs/nfsm_subs.h> 71#include <nfs/nfsmount.h> 72#include <nfs/nqnfs.h> 73#include <nfs/nfsrtt.h> 74 75#include <miscfs/specfs/specdev.h> 76 77#include <netinet/in.h> 78#ifdef ISO 79#include <netiso/iso.h> 80#endif 81 82/* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86u_int32_t nfs_xdrneg1; 87u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92/* And other global data */ 93static u_int32_t nfs_xid = 0; 94static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96}; 97enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99}; 100 101int nfs_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 113static void (*nfs_prev_lease_updatetime) __P((int)); 114static int nfs_prev_nfssvc_sy_narg; 115static sy_call_t *nfs_prev_nfssvc_sy_call; 116 117#ifndef NFS_NOSERVER 118 119static vop_t *nfs_prev_vop_lease_check; 120static int nfs_prev_getfh_sy_narg; 121static sy_call_t *nfs_prev_getfh_sy_call; 122 123/* 124 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 125 */ 126int nfsv3_procid[NFS_NPROCS] = { 127 NFSPROC_NULL, 128 NFSPROC_GETATTR, 129 NFSPROC_SETATTR, 130 NFSPROC_NOOP, 131 NFSPROC_LOOKUP, 132 NFSPROC_READLINK, 133 NFSPROC_READ, 134 NFSPROC_NOOP, 135 NFSPROC_WRITE, 136 NFSPROC_CREATE, 137 NFSPROC_REMOVE, 138 NFSPROC_RENAME, 139 NFSPROC_LINK, 140 NFSPROC_SYMLINK, 141 NFSPROC_MKDIR, 142 NFSPROC_RMDIR, 143 NFSPROC_READDIR, 144 NFSPROC_FSSTAT, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP, 152 NFSPROC_NOOP 153}; 154 155#endif /* NFS_NOSERVER */ 156/* 157 * and the reverse mapping from generic to Version 2 procedure numbers 158 */ 159int nfsv2_procid[NFS_NPROCS] = { 160 NFSV2PROC_NULL, 161 NFSV2PROC_GETATTR, 162 NFSV2PROC_SETATTR, 163 NFSV2PROC_LOOKUP, 164 NFSV2PROC_NOOP, 165 NFSV2PROC_READLINK, 166 NFSV2PROC_READ, 167 NFSV2PROC_WRITE, 168 NFSV2PROC_CREATE, 169 NFSV2PROC_MKDIR, 170 NFSV2PROC_SYMLINK, 171 NFSV2PROC_CREATE, 172 NFSV2PROC_REMOVE, 173 NFSV2PROC_RMDIR, 174 NFSV2PROC_RENAME, 175 NFSV2PROC_LINK, 176 NFSV2PROC_READDIR, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_STATFS, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 NFSV2PROC_NOOP, 186}; 187 188#ifndef NFS_NOSERVER 189/* 190 * Maps errno values to nfs error numbers. 191 * Use NFSERR_IO as the catch all for ones not specifically defined in 192 * RFC 1094. 193 */ 194static u_char nfsrv_v2errmap[ELAST] = { 195 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 199 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 208 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO, NFSERR_IO, NFSERR_IO /* << Last is 83 */ 212}; 213 214/* 215 * Maps errno values to nfs error numbers. 216 * Although it is not obvious whether or not NFS clients really care if 217 * a returned error value is in the specified list for the procedure, the 218 * safest thing to do is filter them appropriately. For Version 2, the 219 * X/Open XNFS document is the only specification that defines error values 220 * for each RPC (The RFC simply lists all possible error values for all RPCs), 221 * so I have decided to not do this for Version 2. 222 * The first entry is the default error return and the rest are the valid 223 * errors for that RPC in increasing numeric order. 224 */ 225static short nfsv3err_null[] = { 226 0, 227 0, 228}; 229 230static short nfsv3err_getattr[] = { 231 NFSERR_IO, 232 NFSERR_IO, 233 NFSERR_STALE, 234 NFSERR_BADHANDLE, 235 NFSERR_SERVERFAULT, 236 0, 237}; 238 239static short nfsv3err_setattr[] = { 240 NFSERR_IO, 241 NFSERR_PERM, 242 NFSERR_IO, 243 NFSERR_ACCES, 244 NFSERR_INVAL, 245 NFSERR_NOSPC, 246 NFSERR_ROFS, 247 NFSERR_DQUOT, 248 NFSERR_STALE, 249 NFSERR_BADHANDLE, 250 NFSERR_NOT_SYNC, 251 NFSERR_SERVERFAULT, 252 0, 253}; 254 255static short nfsv3err_lookup[] = { 256 NFSERR_IO, 257 NFSERR_NOENT, 258 NFSERR_IO, 259 NFSERR_ACCES, 260 NFSERR_NOTDIR, 261 NFSERR_NAMETOL, 262 NFSERR_STALE, 263 NFSERR_BADHANDLE, 264 NFSERR_SERVERFAULT, 265 0, 266}; 267 268static short nfsv3err_access[] = { 269 NFSERR_IO, 270 NFSERR_IO, 271 NFSERR_STALE, 272 NFSERR_BADHANDLE, 273 NFSERR_SERVERFAULT, 274 0, 275}; 276 277static short nfsv3err_readlink[] = { 278 NFSERR_IO, 279 NFSERR_IO, 280 NFSERR_ACCES, 281 NFSERR_INVAL, 282 NFSERR_STALE, 283 NFSERR_BADHANDLE, 284 NFSERR_NOTSUPP, 285 NFSERR_SERVERFAULT, 286 0, 287}; 288 289static short nfsv3err_read[] = { 290 NFSERR_IO, 291 NFSERR_IO, 292 NFSERR_NXIO, 293 NFSERR_ACCES, 294 NFSERR_INVAL, 295 NFSERR_STALE, 296 NFSERR_BADHANDLE, 297 NFSERR_SERVERFAULT, 298 0, 299}; 300 301static short nfsv3err_write[] = { 302 NFSERR_IO, 303 NFSERR_IO, 304 NFSERR_ACCES, 305 NFSERR_INVAL, 306 NFSERR_FBIG, 307 NFSERR_NOSPC, 308 NFSERR_ROFS, 309 NFSERR_DQUOT, 310 NFSERR_STALE, 311 NFSERR_BADHANDLE, 312 NFSERR_SERVERFAULT, 313 0, 314}; 315 316static short nfsv3err_create[] = { 317 NFSERR_IO, 318 NFSERR_IO, 319 NFSERR_ACCES, 320 NFSERR_EXIST, 321 NFSERR_NOTDIR, 322 NFSERR_NOSPC, 323 NFSERR_ROFS, 324 NFSERR_NAMETOL, 325 NFSERR_DQUOT, 326 NFSERR_STALE, 327 NFSERR_BADHANDLE, 328 NFSERR_NOTSUPP, 329 NFSERR_SERVERFAULT, 330 0, 331}; 332 333static short nfsv3err_mkdir[] = { 334 NFSERR_IO, 335 NFSERR_IO, 336 NFSERR_ACCES, 337 NFSERR_EXIST, 338 NFSERR_NOTDIR, 339 NFSERR_NOSPC, 340 NFSERR_ROFS, 341 NFSERR_NAMETOL, 342 NFSERR_DQUOT, 343 NFSERR_STALE, 344 NFSERR_BADHANDLE, 345 NFSERR_NOTSUPP, 346 NFSERR_SERVERFAULT, 347 0, 348}; 349 350static short nfsv3err_symlink[] = { 351 NFSERR_IO, 352 NFSERR_IO, 353 NFSERR_ACCES, 354 NFSERR_EXIST, 355 NFSERR_NOTDIR, 356 NFSERR_NOSPC, 357 NFSERR_ROFS, 358 NFSERR_NAMETOL, 359 NFSERR_DQUOT, 360 NFSERR_STALE, 361 NFSERR_BADHANDLE, 362 NFSERR_NOTSUPP, 363 NFSERR_SERVERFAULT, 364 0, 365}; 366 367static short nfsv3err_mknod[] = { 368 NFSERR_IO, 369 NFSERR_IO, 370 NFSERR_ACCES, 371 NFSERR_EXIST, 372 NFSERR_NOTDIR, 373 NFSERR_NOSPC, 374 NFSERR_ROFS, 375 NFSERR_NAMETOL, 376 NFSERR_DQUOT, 377 NFSERR_STALE, 378 NFSERR_BADHANDLE, 379 NFSERR_NOTSUPP, 380 NFSERR_SERVERFAULT, 381 NFSERR_BADTYPE, 382 0, 383}; 384 385static short nfsv3err_remove[] = { 386 NFSERR_IO, 387 NFSERR_NOENT, 388 NFSERR_IO, 389 NFSERR_ACCES, 390 NFSERR_NOTDIR, 391 NFSERR_ROFS, 392 NFSERR_NAMETOL, 393 NFSERR_STALE, 394 NFSERR_BADHANDLE, 395 NFSERR_SERVERFAULT, 396 0, 397}; 398 399static short nfsv3err_rmdir[] = { 400 NFSERR_IO, 401 NFSERR_NOENT, 402 NFSERR_IO, 403 NFSERR_ACCES, 404 NFSERR_EXIST, 405 NFSERR_NOTDIR, 406 NFSERR_INVAL, 407 NFSERR_ROFS, 408 NFSERR_NAMETOL, 409 NFSERR_NOTEMPTY, 410 NFSERR_STALE, 411 NFSERR_BADHANDLE, 412 NFSERR_NOTSUPP, 413 NFSERR_SERVERFAULT, 414 0, 415}; 416 417static short nfsv3err_rename[] = { 418 NFSERR_IO, 419 NFSERR_NOENT, 420 NFSERR_IO, 421 NFSERR_ACCES, 422 NFSERR_EXIST, 423 NFSERR_XDEV, 424 NFSERR_NOTDIR, 425 NFSERR_ISDIR, 426 NFSERR_INVAL, 427 NFSERR_NOSPC, 428 NFSERR_ROFS, 429 NFSERR_MLINK, 430 NFSERR_NAMETOL, 431 NFSERR_NOTEMPTY, 432 NFSERR_DQUOT, 433 NFSERR_STALE, 434 NFSERR_BADHANDLE, 435 NFSERR_NOTSUPP, 436 NFSERR_SERVERFAULT, 437 0, 438}; 439 440static short nfsv3err_link[] = { 441 NFSERR_IO, 442 NFSERR_IO, 443 NFSERR_ACCES, 444 NFSERR_EXIST, 445 NFSERR_XDEV, 446 NFSERR_NOTDIR, 447 NFSERR_INVAL, 448 NFSERR_NOSPC, 449 NFSERR_ROFS, 450 NFSERR_MLINK, 451 NFSERR_NAMETOL, 452 NFSERR_DQUOT, 453 NFSERR_STALE, 454 NFSERR_BADHANDLE, 455 NFSERR_NOTSUPP, 456 NFSERR_SERVERFAULT, 457 0, 458}; 459 460static short nfsv3err_readdir[] = { 461 NFSERR_IO, 462 NFSERR_IO, 463 NFSERR_ACCES, 464 NFSERR_NOTDIR, 465 NFSERR_STALE, 466 NFSERR_BADHANDLE, 467 NFSERR_BAD_COOKIE, 468 NFSERR_TOOSMALL, 469 NFSERR_SERVERFAULT, 470 0, 471}; 472 473static short nfsv3err_readdirplus[] = { 474 NFSERR_IO, 475 NFSERR_IO, 476 NFSERR_ACCES, 477 NFSERR_NOTDIR, 478 NFSERR_STALE, 479 NFSERR_BADHANDLE, 480 NFSERR_BAD_COOKIE, 481 NFSERR_NOTSUPP, 482 NFSERR_TOOSMALL, 483 NFSERR_SERVERFAULT, 484 0, 485}; 486 487static short nfsv3err_fsstat[] = { 488 NFSERR_IO, 489 NFSERR_IO, 490 NFSERR_STALE, 491 NFSERR_BADHANDLE, 492 NFSERR_SERVERFAULT, 493 0, 494}; 495 496static short nfsv3err_fsinfo[] = { 497 NFSERR_STALE, 498 NFSERR_STALE, 499 NFSERR_BADHANDLE, 500 NFSERR_SERVERFAULT, 501 0, 502}; 503 504static short nfsv3err_pathconf[] = { 505 NFSERR_STALE, 506 NFSERR_STALE, 507 NFSERR_BADHANDLE, 508 NFSERR_SERVERFAULT, 509 0, 510}; 511 512static short nfsv3err_commit[] = { 513 NFSERR_IO, 514 NFSERR_IO, 515 NFSERR_STALE, 516 NFSERR_BADHANDLE, 517 NFSERR_SERVERFAULT, 518 0, 519}; 520 521static short *nfsrv_v3errmap[] = { 522 nfsv3err_null, 523 nfsv3err_getattr, 524 nfsv3err_setattr, 525 nfsv3err_lookup, 526 nfsv3err_access, 527 nfsv3err_readlink, 528 nfsv3err_read, 529 nfsv3err_write, 530 nfsv3err_create, 531 nfsv3err_mkdir, 532 nfsv3err_symlink, 533 nfsv3err_mknod, 534 nfsv3err_remove, 535 nfsv3err_rmdir, 536 nfsv3err_rename, 537 nfsv3err_link, 538 nfsv3err_readdir, 539 nfsv3err_readdirplus, 540 nfsv3err_fsstat, 541 nfsv3err_fsinfo, 542 nfsv3err_pathconf, 543 nfsv3err_commit, 544}; 545 546#endif /* NFS_NOSERVER */ 547 548extern struct nfsrtt nfsrtt; 549extern time_t nqnfsstarttime; 550extern int nqsrv_clockskew; 551extern int nqsrv_writeslack; 552extern int nqsrv_maxlease; 553extern struct nfsstats nfsstats; 554extern int nqnfs_piggy[NFS_NPROCS]; 555extern nfstype nfsv2_type[9]; 556extern nfstype nfsv3_type[9]; 557extern struct nfsnodehashhead *nfsnodehashtbl; 558extern u_long nfsnodehash; 559 560struct getfh_args; 561extern int getfh(struct proc *, struct getfh_args *, int *); 562struct nfssvc_args; 563extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 564 565LIST_HEAD(nfsnodehashhead, nfsnode); 566 567int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 568 569u_quad_t 570nfs_curusec() 571{ 572 struct timeval tv; 573 574 getmicrotime(&tv); 575 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 576} 577 578/* 579 * Create the header for an rpc request packet 580 * The hsiz is the size of the rest of the nfs request header. 581 * (just used to decide if a cluster is a good idea) 582 */ 583struct mbuf * 584nfsm_reqh(vp, procid, hsiz, bposp) 585 struct vnode *vp; 586 u_long procid; 587 int hsiz; 588 caddr_t *bposp; 589{ 590 register struct mbuf *mb; 591 register u_int32_t *tl; 592 register caddr_t bpos; 593 struct mbuf *mb2; 594 struct nfsmount *nmp; 595 int nqflag; 596 597 MGET(mb, M_WAIT, MT_DATA); 598 if (hsiz >= MINCLSIZE) 599 MCLGET(mb, M_WAIT); 600 mb->m_len = 0; 601 bpos = mtod(mb, caddr_t); 602 603 /* 604 * For NQNFS, add lease request. 605 */ 606 if (vp) { 607 nmp = VFSTONFS(vp->v_mount); 608 if (nmp->nm_flag & NFSMNT_NQNFS) { 609 nqflag = NQNFS_NEEDLEASE(vp, procid); 610 if (nqflag) { 611 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 612 *tl++ = txdr_unsigned(nqflag); 613 *tl = txdr_unsigned(nmp->nm_leaseterm); 614 } else { 615 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 616 *tl = 0; 617 } 618 } 619 } 620 /* Finally, return values */ 621 *bposp = bpos; 622 return (mb); 623} 624 625/* 626 * Build the RPC header and fill in the authorization info. 627 * The authorization string argument is only used when the credentials 628 * come from outside of the kernel. 629 * Returns the head of the mbuf list. 630 */ 631struct mbuf * 632nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 633 verf_str, mrest, mrest_len, mbp, xidp) 634 register struct ucred *cr; 635 int nmflag; 636 int procid; 637 int auth_type; 638 int auth_len; 639 char *auth_str; 640 int verf_len; 641 char *verf_str; 642 struct mbuf *mrest; 643 int mrest_len; 644 struct mbuf **mbp; 645 u_int32_t *xidp; 646{ 647 register struct mbuf *mb; 648 register u_int32_t *tl; 649 register caddr_t bpos; 650 register int i; 651 struct mbuf *mreq, *mb2; 652 int siz, grpsiz, authsiz; 653 654 authsiz = nfsm_rndup(auth_len); 655 MGETHDR(mb, M_WAIT, MT_DATA); 656 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 657 MCLGET(mb, M_WAIT); 658 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 659 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 660 } else { 661 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 662 } 663 mb->m_len = 0; 664 mreq = mb; 665 bpos = mtod(mb, caddr_t); 666 667 /* 668 * First the RPC header. 669 */ 670 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 671 672 /* Get a pretty random xid to start with */ 673 if (!nfs_xid) 674 nfs_xid = random(); 675 /* 676 * Skip zero xid if it should ever happen. 677 */ 678 if (++nfs_xid == 0) 679 nfs_xid++; 680 681 *tl++ = *xidp = txdr_unsigned(nfs_xid); 682 *tl++ = rpc_call; 683 *tl++ = rpc_vers; 684 if (nmflag & NFSMNT_NQNFS) { 685 *tl++ = txdr_unsigned(NQNFS_PROG); 686 *tl++ = txdr_unsigned(NQNFS_VER3); 687 } else { 688 *tl++ = txdr_unsigned(NFS_PROG); 689 if (nmflag & NFSMNT_NFSV3) 690 *tl++ = txdr_unsigned(NFS_VER3); 691 else 692 *tl++ = txdr_unsigned(NFS_VER2); 693 } 694 if (nmflag & NFSMNT_NFSV3) 695 *tl++ = txdr_unsigned(procid); 696 else 697 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 698 699 /* 700 * And then the authorization cred. 701 */ 702 *tl++ = txdr_unsigned(auth_type); 703 *tl = txdr_unsigned(authsiz); 704 switch (auth_type) { 705 case RPCAUTH_UNIX: 706 nfsm_build(tl, u_int32_t *, auth_len); 707 *tl++ = 0; /* stamp ?? */ 708 *tl++ = 0; /* NULL hostname */ 709 *tl++ = txdr_unsigned(cr->cr_uid); 710 *tl++ = txdr_unsigned(cr->cr_groups[0]); 711 grpsiz = (auth_len >> 2) - 5; 712 *tl++ = txdr_unsigned(grpsiz); 713 for (i = 1; i <= grpsiz; i++) 714 *tl++ = txdr_unsigned(cr->cr_groups[i]); 715 break; 716 case RPCAUTH_KERB4: 717 siz = auth_len; 718 while (siz > 0) { 719 if (M_TRAILINGSPACE(mb) == 0) { 720 MGET(mb2, M_WAIT, MT_DATA); 721 if (siz >= MINCLSIZE) 722 MCLGET(mb2, M_WAIT); 723 mb->m_next = mb2; 724 mb = mb2; 725 mb->m_len = 0; 726 bpos = mtod(mb, caddr_t); 727 } 728 i = min(siz, M_TRAILINGSPACE(mb)); 729 bcopy(auth_str, bpos, i); 730 mb->m_len += i; 731 auth_str += i; 732 bpos += i; 733 siz -= i; 734 } 735 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 736 for (i = 0; i < siz; i++) 737 *bpos++ = '\0'; 738 mb->m_len += siz; 739 } 740 break; 741 }; 742 743 /* 744 * And the verifier... 745 */ 746 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 747 if (verf_str) { 748 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 749 *tl = txdr_unsigned(verf_len); 750 siz = verf_len; 751 while (siz > 0) { 752 if (M_TRAILINGSPACE(mb) == 0) { 753 MGET(mb2, M_WAIT, MT_DATA); 754 if (siz >= MINCLSIZE) 755 MCLGET(mb2, M_WAIT); 756 mb->m_next = mb2; 757 mb = mb2; 758 mb->m_len = 0; 759 bpos = mtod(mb, caddr_t); 760 } 761 i = min(siz, M_TRAILINGSPACE(mb)); 762 bcopy(verf_str, bpos, i); 763 mb->m_len += i; 764 verf_str += i; 765 bpos += i; 766 siz -= i; 767 } 768 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 769 for (i = 0; i < siz; i++) 770 *bpos++ = '\0'; 771 mb->m_len += siz; 772 } 773 } else { 774 *tl++ = txdr_unsigned(RPCAUTH_NULL); 775 *tl = 0; 776 } 777 mb->m_next = mrest; 778 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 779 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 780 *mbp = mb; 781 return (mreq); 782} 783 784/* 785 * copies mbuf chain to the uio scatter/gather list 786 */ 787int 788nfsm_mbuftouio(mrep, uiop, siz, dpos) 789 struct mbuf **mrep; 790 register struct uio *uiop; 791 int siz; 792 caddr_t *dpos; 793{ 794 register char *mbufcp, *uiocp; 795 register int xfer, left, len; 796 register struct mbuf *mp; 797 long uiosiz, rem; 798 int error = 0; 799 800 mp = *mrep; 801 mbufcp = *dpos; 802 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 803 rem = nfsm_rndup(siz)-siz; 804 while (siz > 0) { 805 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 806 return (EFBIG); 807 left = uiop->uio_iov->iov_len; 808 uiocp = uiop->uio_iov->iov_base; 809 if (left > siz) 810 left = siz; 811 uiosiz = left; 812 while (left > 0) { 813 while (len == 0) { 814 mp = mp->m_next; 815 if (mp == NULL) 816 return (EBADRPC); 817 mbufcp = mtod(mp, caddr_t); 818 len = mp->m_len; 819 } 820 xfer = (left > len) ? len : left; 821#ifdef notdef 822 /* Not Yet.. */ 823 if (uiop->uio_iov->iov_op != NULL) 824 (*(uiop->uio_iov->iov_op)) 825 (mbufcp, uiocp, xfer); 826 else 827#endif 828 if (uiop->uio_segflg == UIO_SYSSPACE) 829 bcopy(mbufcp, uiocp, xfer); 830 else 831 copyout(mbufcp, uiocp, xfer); 832 left -= xfer; 833 len -= xfer; 834 mbufcp += xfer; 835 uiocp += xfer; 836 uiop->uio_offset += xfer; 837 uiop->uio_resid -= xfer; 838 } 839 if (uiop->uio_iov->iov_len <= siz) { 840 uiop->uio_iovcnt--; 841 uiop->uio_iov++; 842 } else { 843 uiop->uio_iov->iov_base += uiosiz; 844 uiop->uio_iov->iov_len -= uiosiz; 845 } 846 siz -= uiosiz; 847 } 848 *dpos = mbufcp; 849 *mrep = mp; 850 if (rem > 0) { 851 if (len < rem) 852 error = nfs_adv(mrep, dpos, rem, len); 853 else 854 *dpos += rem; 855 } 856 return (error); 857} 858 859/* 860 * copies a uio scatter/gather list to an mbuf chain. 861 * NOTE: can ony handle iovcnt == 1 862 */ 863int 864nfsm_uiotombuf(uiop, mq, siz, bpos) 865 register struct uio *uiop; 866 struct mbuf **mq; 867 int siz; 868 caddr_t *bpos; 869{ 870 register char *uiocp; 871 register struct mbuf *mp, *mp2; 872 register int xfer, left, mlen; 873 int uiosiz, clflg, rem; 874 char *cp; 875 876#ifdef DIAGNOSTIC 877 if (uiop->uio_iovcnt != 1) 878 panic("nfsm_uiotombuf: iovcnt != 1"); 879#endif 880 881 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 882 clflg = 1; 883 else 884 clflg = 0; 885 rem = nfsm_rndup(siz)-siz; 886 mp = mp2 = *mq; 887 while (siz > 0) { 888 left = uiop->uio_iov->iov_len; 889 uiocp = uiop->uio_iov->iov_base; 890 if (left > siz) 891 left = siz; 892 uiosiz = left; 893 while (left > 0) { 894 mlen = M_TRAILINGSPACE(mp); 895 if (mlen == 0) { 896 MGET(mp, M_WAIT, MT_DATA); 897 if (clflg) 898 MCLGET(mp, M_WAIT); 899 mp->m_len = 0; 900 mp2->m_next = mp; 901 mp2 = mp; 902 mlen = M_TRAILINGSPACE(mp); 903 } 904 xfer = (left > mlen) ? mlen : left; 905#ifdef notdef 906 /* Not Yet.. */ 907 if (uiop->uio_iov->iov_op != NULL) 908 (*(uiop->uio_iov->iov_op)) 909 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 910 else 911#endif 912 if (uiop->uio_segflg == UIO_SYSSPACE) 913 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 914 else 915 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 916 mp->m_len += xfer; 917 left -= xfer; 918 uiocp += xfer; 919 uiop->uio_offset += xfer; 920 uiop->uio_resid -= xfer; 921 } 922 uiop->uio_iov->iov_base += uiosiz; 923 uiop->uio_iov->iov_len -= uiosiz; 924 siz -= uiosiz; 925 } 926 if (rem > 0) { 927 if (rem > M_TRAILINGSPACE(mp)) { 928 MGET(mp, M_WAIT, MT_DATA); 929 mp->m_len = 0; 930 mp2->m_next = mp; 931 } 932 cp = mtod(mp, caddr_t)+mp->m_len; 933 for (left = 0; left < rem; left++) 934 *cp++ = '\0'; 935 mp->m_len += rem; 936 *bpos = cp; 937 } else 938 *bpos = mtod(mp, caddr_t)+mp->m_len; 939 *mq = mp; 940 return (0); 941} 942 943/* 944 * Help break down an mbuf chain by setting the first siz bytes contiguous 945 * pointed to by returned val. 946 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 947 * cases. (The macros use the vars. dpos and dpos2) 948 */ 949int 950nfsm_disct(mdp, dposp, siz, left, cp2) 951 struct mbuf **mdp; 952 caddr_t *dposp; 953 int siz; 954 int left; 955 caddr_t *cp2; 956{ 957 register struct mbuf *mp, *mp2; 958 register int siz2, xfer; 959 register caddr_t p; 960 961 mp = *mdp; 962 while (left == 0) { 963 *mdp = mp = mp->m_next; 964 if (mp == NULL) 965 return (EBADRPC); 966 left = mp->m_len; 967 *dposp = mtod(mp, caddr_t); 968 } 969 if (left >= siz) { 970 *cp2 = *dposp; 971 *dposp += siz; 972 } else if (mp->m_next == NULL) { 973 return (EBADRPC); 974 } else if (siz > MHLEN) { 975 panic("nfs S too big"); 976 } else { 977 MGET(mp2, M_WAIT, MT_DATA); 978 mp2->m_next = mp->m_next; 979 mp->m_next = mp2; 980 mp->m_len -= left; 981 mp = mp2; 982 *cp2 = p = mtod(mp, caddr_t); 983 bcopy(*dposp, p, left); /* Copy what was left */ 984 siz2 = siz-left; 985 p += left; 986 mp2 = mp->m_next; 987 /* Loop around copying up the siz2 bytes */ 988 while (siz2 > 0) { 989 if (mp2 == NULL) 990 return (EBADRPC); 991 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 992 if (xfer > 0) { 993 bcopy(mtod(mp2, caddr_t), p, xfer); 994 NFSMADV(mp2, xfer); 995 mp2->m_len -= xfer; 996 p += xfer; 997 siz2 -= xfer; 998 } 999 if (siz2 > 0) 1000 mp2 = mp2->m_next; 1001 } 1002 mp->m_len = siz; 1003 *mdp = mp2; 1004 *dposp = mtod(mp2, caddr_t); 1005 } 1006 return (0); 1007} 1008 1009/* 1010 * Advance the position in the mbuf chain. 1011 */ 1012int 1013nfs_adv(mdp, dposp, offs, left) 1014 struct mbuf **mdp; 1015 caddr_t *dposp; 1016 int offs; 1017 int left; 1018{ 1019 register struct mbuf *m; 1020 register int s; 1021 1022 m = *mdp; 1023 s = left; 1024 while (s < offs) { 1025 offs -= s; 1026 m = m->m_next; 1027 if (m == NULL) 1028 return (EBADRPC); 1029 s = m->m_len; 1030 } 1031 *mdp = m; 1032 *dposp = mtod(m, caddr_t)+offs; 1033 return (0); 1034} 1035 1036/* 1037 * Copy a string into mbufs for the hard cases... 1038 */ 1039int 1040nfsm_strtmbuf(mb, bpos, cp, siz) 1041 struct mbuf **mb; 1042 char **bpos; 1043 const char *cp; 1044 long siz; 1045{ 1046 register struct mbuf *m1 = NULL, *m2; 1047 long left, xfer, len, tlen; 1048 u_int32_t *tl; 1049 int putsize; 1050 1051 putsize = 1; 1052 m2 = *mb; 1053 left = M_TRAILINGSPACE(m2); 1054 if (left > 0) { 1055 tl = ((u_int32_t *)(*bpos)); 1056 *tl++ = txdr_unsigned(siz); 1057 putsize = 0; 1058 left -= NFSX_UNSIGNED; 1059 m2->m_len += NFSX_UNSIGNED; 1060 if (left > 0) { 1061 bcopy(cp, (caddr_t) tl, left); 1062 siz -= left; 1063 cp += left; 1064 m2->m_len += left; 1065 left = 0; 1066 } 1067 } 1068 /* Loop around adding mbufs */ 1069 while (siz > 0) { 1070 MGET(m1, M_WAIT, MT_DATA); 1071 if (siz > MLEN) 1072 MCLGET(m1, M_WAIT); 1073 m1->m_len = NFSMSIZ(m1); 1074 m2->m_next = m1; 1075 m2 = m1; 1076 tl = mtod(m1, u_int32_t *); 1077 tlen = 0; 1078 if (putsize) { 1079 *tl++ = txdr_unsigned(siz); 1080 m1->m_len -= NFSX_UNSIGNED; 1081 tlen = NFSX_UNSIGNED; 1082 putsize = 0; 1083 } 1084 if (siz < m1->m_len) { 1085 len = nfsm_rndup(siz); 1086 xfer = siz; 1087 if (xfer < len) 1088 *(tl+(xfer>>2)) = 0; 1089 } else { 1090 xfer = len = m1->m_len; 1091 } 1092 bcopy(cp, (caddr_t) tl, xfer); 1093 m1->m_len = len+tlen; 1094 siz -= xfer; 1095 cp += xfer; 1096 } 1097 *mb = m1; 1098 *bpos = mtod(m1, caddr_t)+m1->m_len; 1099 return (0); 1100} 1101 1102/* 1103 * Called once to initialize data structures... 1104 */ 1105int 1106nfs_init(vfsp) 1107 struct vfsconf *vfsp; 1108{ 1109 register int i; 1110 1111 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1112 1113 /* 1114 * Check to see if major data structures haven't bloated. 1115 */ 1116 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1117 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1118 printf("Try reducing NFS_UIDHASHSIZ\n"); 1119 } 1120 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1121 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1122 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1123 } 1124 nfs_mount_type = vfsp->vfc_typenum; 1125 nfsrtt.pos = 0; 1126 rpc_vers = txdr_unsigned(RPC_VER2); 1127 rpc_call = txdr_unsigned(RPC_CALL); 1128 rpc_reply = txdr_unsigned(RPC_REPLY); 1129 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1130 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1131 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1132 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1133 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1134 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1135 nfs_prog = txdr_unsigned(NFS_PROG); 1136 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1137 nfs_true = txdr_unsigned(TRUE); 1138 nfs_false = txdr_unsigned(FALSE); 1139 nfs_xdrneg1 = txdr_unsigned(-1); 1140 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1141 if (nfs_ticks < 1) 1142 nfs_ticks = 1; 1143 /* Ensure async daemons disabled */ 1144 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1145 nfs_iodwant[i] = (struct proc *)0; 1146 nfs_iodmount[i] = (struct nfsmount *)0; 1147 } 1148 nfs_nhinit(); /* Init the nfsnode table */ 1149#ifndef NFS_NOSERVER 1150 nfsrv_init(0); /* Init server data structures */ 1151 nfsrv_initcache(); /* Init the server request cache */ 1152#endif 1153 1154 /* 1155 * Initialize the nqnfs server stuff. 1156 */ 1157 if (nqnfsstarttime == 0) { 1158 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1159 + nqsrv_clockskew + nqsrv_writeslack; 1160 NQLOADNOVRAM(nqnfsstarttime); 1161 CIRCLEQ_INIT(&nqtimerhead); 1162 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1163 } 1164 1165 /* 1166 * Initialize reply list and start timer 1167 */ 1168 TAILQ_INIT(&nfs_reqq); 1169 1170 nfs_timer(0); 1171 1172 /* 1173 * Set up lease_check and lease_updatetime so that other parts 1174 * of the system can call us, if we are loadable. 1175 */ 1176#ifndef NFS_NOSERVER 1177 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1178 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1179#endif 1180 nfs_prev_lease_updatetime = lease_updatetime; 1181 lease_updatetime = nfs_lease_updatetime; 1182 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1183 sysent[SYS_nfssvc].sy_narg = 2; 1184 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1185 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1186#ifndef NFS_NOSERVER 1187 nfs_prev_getfh_sy_narg = sysent[SYS_getfh].sy_narg; 1188 sysent[SYS_getfh].sy_narg = 2; 1189 nfs_prev_getfh_sy_call = sysent[SYS_getfh].sy_call; 1190 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1191#endif 1192 1193 return (0); 1194} 1195 1196int 1197nfs_uninit(vfsp) 1198 struct vfsconf *vfsp; 1199{ 1200 1201 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1202 nfs_mount_type = -1; 1203#ifndef NFS_NOSERVER 1204 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1205#endif 1206 lease_updatetime = nfs_prev_lease_updatetime; 1207 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1208 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1209#ifndef NFS_NOSERVER 1210 sysent[SYS_getfh].sy_narg = nfs_prev_getfh_sy_narg; 1211 sysent[SYS_getfh].sy_call = nfs_prev_getfh_sy_call; 1212#endif 1213 return (0); 1214} 1215 1216/* 1217 * Attribute cache routines. 1218 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1219 * that are on the mbuf list 1220 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1221 * error otherwise 1222 */ 1223 1224/* 1225 * Load the attribute cache (that lives in the nfsnode entry) with 1226 * the values on the mbuf list and 1227 * Iff vap not NULL 1228 * copy the attributes to *vaper 1229 */ 1230int 1231nfs_loadattrcache(vpp, mdp, dposp, vaper) 1232 struct vnode **vpp; 1233 struct mbuf **mdp; 1234 caddr_t *dposp; 1235 struct vattr *vaper; 1236{ 1237 register struct vnode *vp = *vpp; 1238 register struct vattr *vap; 1239 register struct nfs_fattr *fp; 1240 register struct nfsnode *np; 1241 register int32_t t1; 1242 caddr_t cp2; 1243 int error = 0, rdev; 1244 struct mbuf *md; 1245 enum vtype vtyp; 1246 u_short vmode; 1247 struct timespec mtime; 1248 struct vnode *nvp; 1249 int v3 = NFS_ISV3(vp); 1250 1251 md = *mdp; 1252 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1253 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1254 return (error); 1255 fp = (struct nfs_fattr *)cp2; 1256 if (v3) { 1257 vtyp = nfsv3tov_type(fp->fa_type); 1258 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1259 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1260 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1261 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1262 } else { 1263 vtyp = nfsv2tov_type(fp->fa_type); 1264 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1265 /* 1266 * XXX 1267 * 1268 * The duplicate information returned in fa_type and fa_mode 1269 * is an ambiguity in the NFS version 2 protocol. 1270 * 1271 * VREG should be taken literally as a regular file. If a 1272 * server intents to return some type information differently 1273 * in the upper bits of the mode field (e.g. for sockets, or 1274 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1275 * leave the examination of the mode bits even in the VREG 1276 * case to avoid breakage for bogus servers, but we make sure 1277 * that there are actually type bits set in the upper part of 1278 * fa_mode (and failing that, trust the va_type field). 1279 * 1280 * NFSv3 cleared the issue, and requires fa_mode to not 1281 * contain any type information (while also introduing sockets 1282 * and FIFOs for fa_type). 1283 */ 1284 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1285 vtyp = IFTOVT(vmode); 1286 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1287 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1288 1289 /* 1290 * Really ugly NFSv2 kludge. 1291 */ 1292 if (vtyp == VCHR && rdev == 0xffffffff) 1293 vtyp = VFIFO; 1294 } 1295 1296 /* 1297 * If v_type == VNON it is a new node, so fill in the v_type, 1298 * n_mtime fields. Check to see if it represents a special 1299 * device, and if so, check for a possible alias. Once the 1300 * correct vnode has been obtained, fill in the rest of the 1301 * information. 1302 */ 1303 np = VTONFS(vp); 1304 if (vp->v_type != vtyp) { 1305 vp->v_type = vtyp; 1306 if (vp->v_type == VFIFO) { 1307 vp->v_op = fifo_nfsv2nodeop_p; 1308 } 1309 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1310 vp->v_op = spec_nfsv2nodeop_p; 1311 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1312 if (nvp) { 1313 /* 1314 * Discard unneeded vnode, but save its nfsnode. 1315 * Since the nfsnode does not have a lock, its 1316 * vnode lock has to be carried over. 1317 */ 1318 nvp->v_vnlock = vp->v_vnlock; 1319 vp->v_vnlock = NULL; 1320 nvp->v_data = vp->v_data; 1321 vp->v_data = NULL; 1322 vp->v_op = spec_vnodeop_p; 1323 vrele(vp); 1324 vgone(vp); 1325 /* 1326 * Reinitialize aliased node. 1327 */ 1328 np->n_vnode = nvp; 1329 *vpp = vp = nvp; 1330 } 1331 } 1332 np->n_mtime = mtime.tv_sec; 1333 } 1334 vap = &np->n_vattr; 1335 vap->va_type = vtyp; 1336 vap->va_mode = (vmode & 07777); 1337 vap->va_rdev = (dev_t)rdev; 1338 vap->va_mtime = mtime; 1339 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1340 if (v3) { 1341 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1342 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1343 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1344 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1345 vap->va_blocksize = NFS_FABLKSIZE; 1346 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1347 vap->va_fileid = fxdr_unsigned(int32_t, 1348 fp->fa3_fileid.nfsuquad[1]); 1349 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1350 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1351 vap->va_flags = 0; 1352 vap->va_filerev = 0; 1353 } else { 1354 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1355 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1356 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1357 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1358 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1359 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1360 * NFS_FABLKSIZE; 1361 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1362 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1363 vap->va_flags = 0; 1364 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1365 fp->fa2_ctime.nfsv2_sec); 1366 vap->va_ctime.tv_nsec = 0; 1367 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1368 vap->va_filerev = 0; 1369 } 1370 if (vap->va_size != np->n_size) { 1371 if (vap->va_type == VREG) { 1372 if (np->n_flag & NMODIFIED) { 1373 if (vap->va_size < np->n_size) 1374 vap->va_size = np->n_size; 1375 else 1376 np->n_size = vap->va_size; 1377 } else 1378 np->n_size = vap->va_size; 1379 vnode_pager_setsize(vp, np->n_size); 1380 } else 1381 np->n_size = vap->va_size; 1382 } 1383 np->n_attrstamp = time_second; 1384 if (vaper != NULL) { 1385 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1386 if (np->n_flag & NCHG) { 1387 if (np->n_flag & NACC) 1388 vaper->va_atime = np->n_atim; 1389 if (np->n_flag & NUPD) 1390 vaper->va_mtime = np->n_mtim; 1391 } 1392 } 1393 return (0); 1394} 1395 1396#ifdef NFS_ACDEBUG 1397#include <sys/sysctl.h> 1398static int nfs_acdebug; 1399SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1400#endif 1401 1402/* 1403 * Check the time stamp 1404 * If the cache is valid, copy contents to *vap and return 0 1405 * otherwise return an error 1406 */ 1407int 1408nfs_getattrcache(vp, vaper) 1409 register struct vnode *vp; 1410 struct vattr *vaper; 1411{ 1412 register struct nfsnode *np; 1413 register struct vattr *vap; 1414 struct nfsmount *nmp; 1415 int timeo; 1416 1417 np = VTONFS(vp); 1418 vap = &np->n_vattr; 1419 nmp = VFSTONFS(vp->v_mount); 1420 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1421 timeo = (time_second - np->n_mtime) / 10; 1422 1423#ifdef NFS_ACDEBUG 1424 if (nfs_acdebug>1) 1425 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1426#endif 1427 1428 if (vap->va_type == VDIR) { 1429 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1430 timeo = nmp->nm_acdirmin; 1431 else if (timeo > nmp->nm_acdirmax) 1432 timeo = nmp->nm_acdirmax; 1433 } else { 1434 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1435 timeo = nmp->nm_acregmin; 1436 else if (timeo > nmp->nm_acregmax) 1437 timeo = nmp->nm_acregmax; 1438 } 1439 1440#ifdef NFS_ACDEBUG 1441 if (nfs_acdebug > 2) 1442 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1443 nmp->nm_acregmin, nmp->nm_acregmax, 1444 nmp->nm_acdirmin, nmp->nm_acdirmax); 1445 1446 if (nfs_acdebug) 1447 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1448 (time_second - np->n_attrstamp), timeo); 1449#endif 1450 1451 if ((time_second - np->n_attrstamp) >= timeo) { 1452 nfsstats.attrcache_misses++; 1453 return (ENOENT); 1454 } 1455 nfsstats.attrcache_hits++; 1456 if (vap->va_size != np->n_size) { 1457 if (vap->va_type == VREG) { 1458 if (np->n_flag & NMODIFIED) { 1459 if (vap->va_size < np->n_size) 1460 vap->va_size = np->n_size; 1461 else 1462 np->n_size = vap->va_size; 1463 } else 1464 np->n_size = vap->va_size; 1465 vnode_pager_setsize(vp, np->n_size); 1466 } else 1467 np->n_size = vap->va_size; 1468 } 1469 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1470 if (np->n_flag & NCHG) { 1471 if (np->n_flag & NACC) 1472 vaper->va_atime = np->n_atim; 1473 if (np->n_flag & NUPD) 1474 vaper->va_mtime = np->n_mtim; 1475 } 1476 return (0); 1477} 1478 1479#ifndef NFS_NOSERVER 1480/* 1481 * Set up nameidata for a lookup() call and do it. 1482 * 1483 * If pubflag is set, this call is done for a lookup operation on the 1484 * public filehandle. In that case we allow crossing mountpoints and 1485 * absolute pathnames. However, the caller is expected to check that 1486 * the lookup result is within the public fs, and deny access if 1487 * it is not. 1488 */ 1489int 1490nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1491 register struct nameidata *ndp; 1492 fhandle_t *fhp; 1493 int len; 1494 struct nfssvc_sock *slp; 1495 struct sockaddr *nam; 1496 struct mbuf **mdp; 1497 caddr_t *dposp; 1498 struct vnode **retdirp; 1499 struct proc *p; 1500 int kerbflag, pubflag; 1501{ 1502 register int i, rem; 1503 register struct mbuf *md; 1504 register char *fromcp, *tocp, *cp; 1505 struct iovec aiov; 1506 struct uio auio; 1507 struct vnode *dp; 1508 int error, rdonly, linklen; 1509 struct componentname *cnp = &ndp->ni_cnd; 1510 1511 *retdirp = (struct vnode *)0; 1512 cnp->cn_pnbuf = zalloc(namei_zone); 1513 1514 /* 1515 * Copy the name from the mbuf list to ndp->ni_pnbuf 1516 * and set the various ndp fields appropriately. 1517 */ 1518 fromcp = *dposp; 1519 tocp = cnp->cn_pnbuf; 1520 md = *mdp; 1521 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1522 cnp->cn_hash = 0; 1523 for (i = 0; i < len; i++) { 1524 while (rem == 0) { 1525 md = md->m_next; 1526 if (md == NULL) { 1527 error = EBADRPC; 1528 goto out; 1529 } 1530 fromcp = mtod(md, caddr_t); 1531 rem = md->m_len; 1532 } 1533 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1534 error = EACCES; 1535 goto out; 1536 } 1537 cnp->cn_hash += (unsigned char)*fromcp; 1538 *tocp++ = *fromcp++; 1539 rem--; 1540 } 1541 *tocp = '\0'; 1542 *mdp = md; 1543 *dposp = fromcp; 1544 len = nfsm_rndup(len)-len; 1545 if (len > 0) { 1546 if (rem >= len) 1547 *dposp += len; 1548 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1549 goto out; 1550 } 1551 1552 /* 1553 * Extract and set starting directory. 1554 */ 1555 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1556 nam, &rdonly, kerbflag, pubflag); 1557 if (error) 1558 goto out; 1559 if (dp->v_type != VDIR) { 1560 vrele(dp); 1561 error = ENOTDIR; 1562 goto out; 1563 } 1564 1565 if (rdonly) 1566 cnp->cn_flags |= RDONLY; 1567 1568 *retdirp = dp; 1569 1570 if (pubflag) { 1571 /* 1572 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1573 * and the 'native path' indicator. 1574 */ 1575 cp = zalloc(namei_zone); 1576 fromcp = cnp->cn_pnbuf; 1577 tocp = cp; 1578 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1579 switch ((unsigned char)*fromcp) { 1580 case WEBNFS_NATIVE_CHAR: 1581 /* 1582 * 'Native' path for us is the same 1583 * as a path according to the NFS spec, 1584 * just skip the escape char. 1585 */ 1586 fromcp++; 1587 break; 1588 /* 1589 * More may be added in the future, range 0x80-0xff 1590 */ 1591 default: 1592 error = EIO; 1593 zfree(namei_zone, cp); 1594 goto out; 1595 } 1596 } 1597 /* 1598 * Translate the '%' escapes, URL-style. 1599 */ 1600 while (*fromcp != '\0') { 1601 if (*fromcp == WEBNFS_ESC_CHAR) { 1602 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1603 fromcp++; 1604 *tocp++ = HEXSTRTOI(fromcp); 1605 fromcp += 2; 1606 continue; 1607 } else { 1608 error = ENOENT; 1609 zfree(namei_zone, cp); 1610 goto out; 1611 } 1612 } else 1613 *tocp++ = *fromcp++; 1614 } 1615 *tocp = '\0'; 1616 zfree(namei_zone, cnp->cn_pnbuf); 1617 cnp->cn_pnbuf = cp; 1618 } 1619 1620 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1621 ndp->ni_segflg = UIO_SYSSPACE; 1622 1623 if (pubflag) { 1624 ndp->ni_rootdir = rootvnode; 1625 ndp->ni_loopcnt = 0; 1626 if (cnp->cn_pnbuf[0] == '/') 1627 dp = rootvnode; 1628 } else { 1629 cnp->cn_flags |= NOCROSSMOUNT; 1630 } 1631 1632 cnp->cn_proc = p; 1633 VREF(dp); 1634 1635 for (;;) { 1636 cnp->cn_nameptr = cnp->cn_pnbuf; 1637 ndp->ni_startdir = dp; 1638 /* 1639 * And call lookup() to do the real work 1640 */ 1641 error = lookup(ndp); 1642 if (error) 1643 break; 1644 /* 1645 * Check for encountering a symbolic link 1646 */ 1647 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1648 nfsrv_object_create(ndp->ni_vp); 1649 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1650 cnp->cn_flags |= HASBUF; 1651 return (0); 1652 } 1653 break; 1654 } else { 1655 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1656 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1657 if (!pubflag) { 1658 vrele(ndp->ni_dvp); 1659 vput(ndp->ni_vp); 1660 ndp->ni_vp = NULL; 1661 error = EINVAL; 1662 break; 1663 } 1664 1665 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1666 error = ELOOP; 1667 break; 1668 } 1669 if (ndp->ni_pathlen > 1) 1670 cp = zalloc(namei_zone); 1671 else 1672 cp = cnp->cn_pnbuf; 1673 aiov.iov_base = cp; 1674 aiov.iov_len = MAXPATHLEN; 1675 auio.uio_iov = &aiov; 1676 auio.uio_iovcnt = 1; 1677 auio.uio_offset = 0; 1678 auio.uio_rw = UIO_READ; 1679 auio.uio_segflg = UIO_SYSSPACE; 1680 auio.uio_procp = (struct proc *)0; 1681 auio.uio_resid = MAXPATHLEN; 1682 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1683 if (error) { 1684 badlink: 1685 if (ndp->ni_pathlen > 1) 1686 zfree(namei_zone, cp); 1687 break; 1688 } 1689 linklen = MAXPATHLEN - auio.uio_resid; 1690 if (linklen == 0) { 1691 error = ENOENT; 1692 goto badlink; 1693 } 1694 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1695 error = ENAMETOOLONG; 1696 goto badlink; 1697 } 1698 if (ndp->ni_pathlen > 1) { 1699 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1700 zfree(namei_zone, cnp->cn_pnbuf); 1701 cnp->cn_pnbuf = cp; 1702 } else 1703 cnp->cn_pnbuf[linklen] = '\0'; 1704 ndp->ni_pathlen += linklen; 1705 vput(ndp->ni_vp); 1706 dp = ndp->ni_dvp; 1707 /* 1708 * Check if root directory should replace current directory. 1709 */ 1710 if (cnp->cn_pnbuf[0] == '/') { 1711 vrele(dp); 1712 dp = ndp->ni_rootdir; 1713 VREF(dp); 1714 } 1715 } 1716 } 1717out: 1718 zfree(namei_zone, cnp->cn_pnbuf); 1719 return (error); 1720} 1721 1722/* 1723 * A fiddled version of m_adj() that ensures null fill to a long 1724 * boundary and only trims off the back end 1725 */ 1726void 1727nfsm_adj(mp, len, nul) 1728 struct mbuf *mp; 1729 register int len; 1730 int nul; 1731{ 1732 register struct mbuf *m; 1733 register int count, i; 1734 register char *cp; 1735 1736 /* 1737 * Trim from tail. Scan the mbuf chain, 1738 * calculating its length and finding the last mbuf. 1739 * If the adjustment only affects this mbuf, then just 1740 * adjust and return. Otherwise, rescan and truncate 1741 * after the remaining size. 1742 */ 1743 count = 0; 1744 m = mp; 1745 for (;;) { 1746 count += m->m_len; 1747 if (m->m_next == (struct mbuf *)0) 1748 break; 1749 m = m->m_next; 1750 } 1751 if (m->m_len > len) { 1752 m->m_len -= len; 1753 if (nul > 0) { 1754 cp = mtod(m, caddr_t)+m->m_len-nul; 1755 for (i = 0; i < nul; i++) 1756 *cp++ = '\0'; 1757 } 1758 return; 1759 } 1760 count -= len; 1761 if (count < 0) 1762 count = 0; 1763 /* 1764 * Correct length for chain is "count". 1765 * Find the mbuf with last data, adjust its length, 1766 * and toss data from remaining mbufs on chain. 1767 */ 1768 for (m = mp; m; m = m->m_next) { 1769 if (m->m_len >= count) { 1770 m->m_len = count; 1771 if (nul > 0) { 1772 cp = mtod(m, caddr_t)+m->m_len-nul; 1773 for (i = 0; i < nul; i++) 1774 *cp++ = '\0'; 1775 } 1776 break; 1777 } 1778 count -= m->m_len; 1779 } 1780 for (m = m->m_next;m;m = m->m_next) 1781 m->m_len = 0; 1782} 1783 1784/* 1785 * Make these functions instead of macros, so that the kernel text size 1786 * doesn't get too big... 1787 */ 1788void 1789nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1790 struct nfsrv_descript *nfsd; 1791 int before_ret; 1792 register struct vattr *before_vap; 1793 int after_ret; 1794 struct vattr *after_vap; 1795 struct mbuf **mbp; 1796 char **bposp; 1797{ 1798 register struct mbuf *mb = *mbp, *mb2; 1799 register char *bpos = *bposp; 1800 register u_int32_t *tl; 1801 1802 if (before_ret) { 1803 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1804 *tl = nfs_false; 1805 } else { 1806 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1807 *tl++ = nfs_true; 1808 txdr_hyper(&(before_vap->va_size), tl); 1809 tl += 2; 1810 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1811 tl += 2; 1812 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1813 } 1814 *bposp = bpos; 1815 *mbp = mb; 1816 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1817} 1818 1819void 1820nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1821 struct nfsrv_descript *nfsd; 1822 int after_ret; 1823 struct vattr *after_vap; 1824 struct mbuf **mbp; 1825 char **bposp; 1826{ 1827 register struct mbuf *mb = *mbp, *mb2; 1828 register char *bpos = *bposp; 1829 register u_int32_t *tl; 1830 register struct nfs_fattr *fp; 1831 1832 if (after_ret) { 1833 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1834 *tl = nfs_false; 1835 } else { 1836 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1837 *tl++ = nfs_true; 1838 fp = (struct nfs_fattr *)tl; 1839 nfsm_srvfattr(nfsd, after_vap, fp); 1840 } 1841 *mbp = mb; 1842 *bposp = bpos; 1843} 1844 1845void 1846nfsm_srvfattr(nfsd, vap, fp) 1847 register struct nfsrv_descript *nfsd; 1848 register struct vattr *vap; 1849 register struct nfs_fattr *fp; 1850{ 1851 1852 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1853 fp->fa_uid = txdr_unsigned(vap->va_uid); 1854 fp->fa_gid = txdr_unsigned(vap->va_gid); 1855 if (nfsd->nd_flag & ND_NFSV3) { 1856 fp->fa_type = vtonfsv3_type(vap->va_type); 1857 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1858 txdr_hyper(&vap->va_size, &fp->fa3_size); 1859 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1860 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1861 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1862 fp->fa3_fsid.nfsuquad[0] = 0; 1863 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1864 fp->fa3_fileid.nfsuquad[0] = 0; 1865 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1866 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1867 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1868 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1869 } else { 1870 fp->fa_type = vtonfsv2_type(vap->va_type); 1871 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1872 fp->fa2_size = txdr_unsigned(vap->va_size); 1873 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1874 if (vap->va_type == VFIFO) 1875 fp->fa2_rdev = 0xffffffff; 1876 else 1877 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1878 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1879 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1880 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1881 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1882 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1883 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1884 } 1885} 1886 1887/* 1888 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1889 * - look up fsid in mount list (if not found ret error) 1890 * - get vp and export rights by calling VFS_FHTOVP() 1891 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1892 * - if not lockflag unlock it with VOP_UNLOCK() 1893 */ 1894int 1895nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1896 fhandle_t *fhp; 1897 int lockflag; 1898 struct vnode **vpp; 1899 struct ucred *cred; 1900 struct nfssvc_sock *slp; 1901 struct sockaddr *nam; 1902 int *rdonlyp; 1903 int kerbflag; 1904 int pubflag; 1905{ 1906 struct proc *p = curproc; /* XXX */ 1907 register struct mount *mp; 1908 register int i; 1909 struct ucred *credanon; 1910 int error, exflags; 1911#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1912 struct sockaddr_int *saddr; 1913#endif 1914 1915 *vpp = (struct vnode *)0; 1916 1917 if (nfs_ispublicfh(fhp)) { 1918 if (!pubflag || !nfs_pub.np_valid) 1919 return (ESTALE); 1920 fhp = &nfs_pub.np_handle; 1921 } 1922 1923 mp = vfs_getvfs(&fhp->fh_fsid); 1924 if (!mp) 1925 return (ESTALE); 1926 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1927 if (error) 1928 return (error); 1929#ifdef MNT_EXNORESPORT 1930 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1931 saddr = (struct sockaddr_in *)nam; 1932 if (saddr->sin_family == AF_INET && 1933 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1934 vput(*vpp); 1935 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1936 } 1937 } 1938#endif 1939 /* 1940 * Check/setup credentials. 1941 */ 1942 if (exflags & MNT_EXKERB) { 1943 if (!kerbflag) { 1944 vput(*vpp); 1945 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1946 } 1947 } else if (kerbflag) { 1948 vput(*vpp); 1949 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1950 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1951 cred->cr_uid = credanon->cr_uid; 1952 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1953 cred->cr_groups[i] = credanon->cr_groups[i]; 1954 cred->cr_ngroups = i; 1955 } 1956 if (exflags & MNT_EXRDONLY) 1957 *rdonlyp = 1; 1958 else 1959 *rdonlyp = 0; 1960 1961 nfsrv_object_create(*vpp); 1962 1963 if (!lockflag) 1964 VOP_UNLOCK(*vpp, 0, p); 1965 return (0); 1966} 1967 1968 1969/* 1970 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1971 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1972 * transformed this to all zeroes in both cases, so check for it. 1973 */ 1974int 1975nfs_ispublicfh(fhp) 1976 fhandle_t *fhp; 1977{ 1978 char *cp = (char *)fhp; 1979 int i; 1980 1981 for (i = 0; i < NFSX_V3FH; i++) 1982 if (*cp++ != 0) 1983 return (FALSE); 1984 return (TRUE); 1985} 1986 1987#endif /* NFS_NOSERVER */ 1988/* 1989 * This function compares two net addresses by family and returns TRUE 1990 * if they are the same host. 1991 * If there is any doubt, return FALSE. 1992 * The AF_INET family is handled as a special case so that address mbufs 1993 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1994 */ 1995int 1996netaddr_match(family, haddr, nam) 1997 int family; 1998 union nethostaddr *haddr; 1999 struct sockaddr *nam; 2000{ 2001 register struct sockaddr_in *inetaddr; 2002 2003 switch (family) { 2004 case AF_INET: 2005 inetaddr = (struct sockaddr_in *)nam; 2006 if (inetaddr->sin_family == AF_INET && 2007 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2008 return (1); 2009 break; 2010#ifdef ISO 2011 case AF_ISO: 2012 { 2013 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2014 2015 isoaddr1 = (struct sockaddr_iso *)nam; 2016 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2017 if (isoaddr1->siso_family == AF_ISO && 2018 isoaddr1->siso_nlen > 0 && 2019 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2020 SAME_ISOADDR(isoaddr1, isoaddr2)) 2021 return (1); 2022 break; 2023 } 2024#endif /* ISO */ 2025 default: 2026 break; 2027 }; 2028 return (0); 2029} 2030 2031static nfsuint64 nfs_nullcookie = { 0, 0 }; 2032/* 2033 * This function finds the directory cookie that corresponds to the 2034 * logical byte offset given. 2035 */ 2036nfsuint64 * 2037nfs_getcookie(np, off, add) 2038 register struct nfsnode *np; 2039 off_t off; 2040 int add; 2041{ 2042 register struct nfsdmap *dp, *dp2; 2043 register int pos; 2044 2045 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2046 if (pos == 0 || off < 0) { 2047#ifdef DIAGNOSTIC 2048 if (add) 2049 panic("nfs getcookie add at <= 0"); 2050#endif 2051 return (&nfs_nullcookie); 2052 } 2053 pos--; 2054 dp = np->n_cookies.lh_first; 2055 if (!dp) { 2056 if (add) { 2057 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2058 M_NFSDIROFF, M_WAITOK); 2059 dp->ndm_eocookie = 0; 2060 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2061 } else 2062 return ((nfsuint64 *)0); 2063 } 2064 while (pos >= NFSNUMCOOKIES) { 2065 pos -= NFSNUMCOOKIES; 2066 if (dp->ndm_list.le_next) { 2067 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2068 pos >= dp->ndm_eocookie) 2069 return ((nfsuint64 *)0); 2070 dp = dp->ndm_list.le_next; 2071 } else if (add) { 2072 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2073 M_NFSDIROFF, M_WAITOK); 2074 dp2->ndm_eocookie = 0; 2075 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2076 dp = dp2; 2077 } else 2078 return ((nfsuint64 *)0); 2079 } 2080 if (pos >= dp->ndm_eocookie) { 2081 if (add) 2082 dp->ndm_eocookie = pos + 1; 2083 else 2084 return ((nfsuint64 *)0); 2085 } 2086 return (&dp->ndm_cookies[pos]); 2087} 2088 2089/* 2090 * Invalidate cached directory information, except for the actual directory 2091 * blocks (which are invalidated separately). 2092 * Done mainly to avoid the use of stale offset cookies. 2093 */ 2094void 2095nfs_invaldir(vp) 2096 register struct vnode *vp; 2097{ 2098 register struct nfsnode *np = VTONFS(vp); 2099 2100#ifdef DIAGNOSTIC 2101 if (vp->v_type != VDIR) 2102 panic("nfs: invaldir not dir"); 2103#endif 2104 np->n_direofoffset = 0; 2105 np->n_cookieverf.nfsuquad[0] = 0; 2106 np->n_cookieverf.nfsuquad[1] = 0; 2107 if (np->n_cookies.lh_first) 2108 np->n_cookies.lh_first->ndm_eocookie = 0; 2109} 2110 2111/* 2112 * The write verifier has changed (probably due to a server reboot), so all 2113 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2114 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2115 * flag. Once done the new write verifier can be set for the mount point. 2116 */ 2117void 2118nfs_clearcommit(mp) 2119 struct mount *mp; 2120{ 2121 register struct vnode *vp, *nvp; 2122 register struct buf *bp, *nbp; 2123 int s; 2124 2125 s = splbio(); 2126loop: 2127 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2128 if (vp->v_mount != mp) /* Paranoia */ 2129 goto loop; 2130 nvp = vp->v_mntvnodes.le_next; 2131 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2132 nbp = TAILQ_NEXT(bp, b_vnbufs); 2133 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2134 == (B_DELWRI | B_NEEDCOMMIT)) 2135 bp->b_flags &= ~B_NEEDCOMMIT; 2136 } 2137 } 2138 splx(s); 2139} 2140 2141#ifndef NFS_NOSERVER 2142/* 2143 * Map errnos to NFS error numbers. For Version 3 also filter out error 2144 * numbers not specified for the associated procedure. 2145 */ 2146int 2147nfsrv_errmap(nd, err) 2148 struct nfsrv_descript *nd; 2149 register int err; 2150{ 2151 register short *defaulterrp, *errp; 2152 2153 if (nd->nd_flag & ND_NFSV3) { 2154 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2155 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2156 while (*++errp) { 2157 if (*errp == err) 2158 return (err); 2159 else if (*errp > err) 2160 break; 2161 } 2162 return ((int)*defaulterrp); 2163 } else 2164 return (err & 0xffff); 2165 } 2166 if (err <= ELAST) 2167 return ((int)nfsrv_v2errmap[err - 1]); 2168 return (NFSERR_IO); 2169} 2170 2171int 2172nfsrv_object_create(vp) 2173 struct vnode *vp; 2174{ 2175 2176 if (vp == NULL || vp->v_type != VREG) 2177 return (1); 2178 return (vfs_object_create(vp, curproc, 2179 curproc ? curproc->p_ucred : NULL, 1)); 2180} 2181 2182/* 2183 * Sort the group list in increasing numerical order. 2184 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2185 * that used to be here.) 2186 */ 2187void 2188nfsrvw_sort(list, num) 2189 register gid_t *list; 2190 register int num; 2191{ 2192 register int i, j; 2193 gid_t v; 2194 2195 /* Insertion sort. */ 2196 for (i = 1; i < num; i++) { 2197 v = list[i]; 2198 /* find correct slot for value v, moving others up */ 2199 for (j = i; --j >= 0 && v < list[j];) 2200 list[j + 1] = list[j]; 2201 list[j + 1] = v; 2202 } 2203} 2204 2205/* 2206 * copy credentials making sure that the result can be compared with bcmp(). 2207 */ 2208void 2209nfsrv_setcred(incred, outcred) 2210 register struct ucred *incred, *outcred; 2211{ 2212 register int i; 2213 2214 bzero((caddr_t)outcred, sizeof (struct ucred)); 2215 outcred->cr_ref = 1; 2216 outcred->cr_uid = incred->cr_uid; 2217 outcred->cr_ngroups = incred->cr_ngroups; 2218 for (i = 0; i < incred->cr_ngroups; i++) 2219 outcred->cr_groups[i] = incred->cr_groups[i]; 2220 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2221} 2222#endif /* NFS_NOSERVER */ 2223