nfs_srvsubs.c revision 36534
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 1.59 1998/05/31 18:11:03 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_long nfs_xdrneg1; 87u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92/* And other global data */ 93static u_long nfs_xid = 0; 94static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96}; 97enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99}; 100 101int nfs_mount_type; 102int nfs_ticks; 103 104struct nfs_reqq nfs_reqq; 105struct nfssvc_sockhead nfssvc_sockhead; 106int nfssvc_sockhead_flag; 107struct nfsd_head nfsd_head; 108int nfsd_head_flag; 109struct nfs_bufq nfs_bufq; 110struct nqtimerhead nqtimerhead; 111struct nqfhhashhead *nqfhhashtbl; 112u_long nqfhhash; 113 114#ifndef NFS_NOSERVER 115/* 116 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 117 */ 118int nfsv3_procid[NFS_NPROCS] = { 119 NFSPROC_NULL, 120 NFSPROC_GETATTR, 121 NFSPROC_SETATTR, 122 NFSPROC_NOOP, 123 NFSPROC_LOOKUP, 124 NFSPROC_READLINK, 125 NFSPROC_READ, 126 NFSPROC_NOOP, 127 NFSPROC_WRITE, 128 NFSPROC_CREATE, 129 NFSPROC_REMOVE, 130 NFSPROC_RENAME, 131 NFSPROC_LINK, 132 NFSPROC_SYMLINK, 133 NFSPROC_MKDIR, 134 NFSPROC_RMDIR, 135 NFSPROC_READDIR, 136 NFSPROC_FSSTAT, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP 145}; 146 147#endif /* NFS_NOSERVER */ 148/* 149 * and the reverse mapping from generic to Version 2 procedure numbers 150 */ 151int nfsv2_procid[NFS_NPROCS] = { 152 NFSV2PROC_NULL, 153 NFSV2PROC_GETATTR, 154 NFSV2PROC_SETATTR, 155 NFSV2PROC_LOOKUP, 156 NFSV2PROC_NOOP, 157 NFSV2PROC_READLINK, 158 NFSV2PROC_READ, 159 NFSV2PROC_WRITE, 160 NFSV2PROC_CREATE, 161 NFSV2PROC_MKDIR, 162 NFSV2PROC_SYMLINK, 163 NFSV2PROC_CREATE, 164 NFSV2PROC_REMOVE, 165 NFSV2PROC_RMDIR, 166 NFSV2PROC_RENAME, 167 NFSV2PROC_LINK, 168 NFSV2PROC_READDIR, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_STATFS, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178}; 179 180#ifndef NFS_NOSERVER 181/* 182 * Maps errno values to nfs error numbers. 183 * Use NFSERR_IO as the catch all for ones not specifically defined in 184 * RFC 1094. 185 */ 186static u_char nfsrv_v2errmap[ELAST] = { 187 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 188 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 191 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 200 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO /* << Last is 83 */ 204}; 205 206/* 207 * Maps errno values to nfs error numbers. 208 * Although it is not obvious whether or not NFS clients really care if 209 * a returned error value is in the specified list for the procedure, the 210 * safest thing to do is filter them appropriately. For Version 2, the 211 * X/Open XNFS document is the only specification that defines error values 212 * for each RPC (The RFC simply lists all possible error values for all RPCs), 213 * so I have decided to not do this for Version 2. 214 * The first entry is the default error return and the rest are the valid 215 * errors for that RPC in increasing numeric order. 216 */ 217static short nfsv3err_null[] = { 218 0, 219 0, 220}; 221 222static short nfsv3err_getattr[] = { 223 NFSERR_IO, 224 NFSERR_IO, 225 NFSERR_STALE, 226 NFSERR_BADHANDLE, 227 NFSERR_SERVERFAULT, 228 0, 229}; 230 231static short nfsv3err_setattr[] = { 232 NFSERR_IO, 233 NFSERR_PERM, 234 NFSERR_IO, 235 NFSERR_ACCES, 236 NFSERR_INVAL, 237 NFSERR_NOSPC, 238 NFSERR_ROFS, 239 NFSERR_DQUOT, 240 NFSERR_STALE, 241 NFSERR_BADHANDLE, 242 NFSERR_NOT_SYNC, 243 NFSERR_SERVERFAULT, 244 0, 245}; 246 247static short nfsv3err_lookup[] = { 248 NFSERR_IO, 249 NFSERR_NOENT, 250 NFSERR_IO, 251 NFSERR_ACCES, 252 NFSERR_NOTDIR, 253 NFSERR_NAMETOL, 254 NFSERR_STALE, 255 NFSERR_BADHANDLE, 256 NFSERR_SERVERFAULT, 257 0, 258}; 259 260static short nfsv3err_access[] = { 261 NFSERR_IO, 262 NFSERR_IO, 263 NFSERR_STALE, 264 NFSERR_BADHANDLE, 265 NFSERR_SERVERFAULT, 266 0, 267}; 268 269static short nfsv3err_readlink[] = { 270 NFSERR_IO, 271 NFSERR_IO, 272 NFSERR_ACCES, 273 NFSERR_INVAL, 274 NFSERR_STALE, 275 NFSERR_BADHANDLE, 276 NFSERR_NOTSUPP, 277 NFSERR_SERVERFAULT, 278 0, 279}; 280 281static short nfsv3err_read[] = { 282 NFSERR_IO, 283 NFSERR_IO, 284 NFSERR_NXIO, 285 NFSERR_ACCES, 286 NFSERR_INVAL, 287 NFSERR_STALE, 288 NFSERR_BADHANDLE, 289 NFSERR_SERVERFAULT, 290 0, 291}; 292 293static short nfsv3err_write[] = { 294 NFSERR_IO, 295 NFSERR_IO, 296 NFSERR_ACCES, 297 NFSERR_INVAL, 298 NFSERR_FBIG, 299 NFSERR_NOSPC, 300 NFSERR_ROFS, 301 NFSERR_DQUOT, 302 NFSERR_STALE, 303 NFSERR_BADHANDLE, 304 NFSERR_SERVERFAULT, 305 0, 306}; 307 308static short nfsv3err_create[] = { 309 NFSERR_IO, 310 NFSERR_IO, 311 NFSERR_ACCES, 312 NFSERR_EXIST, 313 NFSERR_NOTDIR, 314 NFSERR_NOSPC, 315 NFSERR_ROFS, 316 NFSERR_NAMETOL, 317 NFSERR_DQUOT, 318 NFSERR_STALE, 319 NFSERR_BADHANDLE, 320 NFSERR_NOTSUPP, 321 NFSERR_SERVERFAULT, 322 0, 323}; 324 325static short nfsv3err_mkdir[] = { 326 NFSERR_IO, 327 NFSERR_IO, 328 NFSERR_ACCES, 329 NFSERR_EXIST, 330 NFSERR_NOTDIR, 331 NFSERR_NOSPC, 332 NFSERR_ROFS, 333 NFSERR_NAMETOL, 334 NFSERR_DQUOT, 335 NFSERR_STALE, 336 NFSERR_BADHANDLE, 337 NFSERR_NOTSUPP, 338 NFSERR_SERVERFAULT, 339 0, 340}; 341 342static short nfsv3err_symlink[] = { 343 NFSERR_IO, 344 NFSERR_IO, 345 NFSERR_ACCES, 346 NFSERR_EXIST, 347 NFSERR_NOTDIR, 348 NFSERR_NOSPC, 349 NFSERR_ROFS, 350 NFSERR_NAMETOL, 351 NFSERR_DQUOT, 352 NFSERR_STALE, 353 NFSERR_BADHANDLE, 354 NFSERR_NOTSUPP, 355 NFSERR_SERVERFAULT, 356 0, 357}; 358 359static short nfsv3err_mknod[] = { 360 NFSERR_IO, 361 NFSERR_IO, 362 NFSERR_ACCES, 363 NFSERR_EXIST, 364 NFSERR_NOTDIR, 365 NFSERR_NOSPC, 366 NFSERR_ROFS, 367 NFSERR_NAMETOL, 368 NFSERR_DQUOT, 369 NFSERR_STALE, 370 NFSERR_BADHANDLE, 371 NFSERR_NOTSUPP, 372 NFSERR_SERVERFAULT, 373 NFSERR_BADTYPE, 374 0, 375}; 376 377static short nfsv3err_remove[] = { 378 NFSERR_IO, 379 NFSERR_NOENT, 380 NFSERR_IO, 381 NFSERR_ACCES, 382 NFSERR_NOTDIR, 383 NFSERR_ROFS, 384 NFSERR_NAMETOL, 385 NFSERR_STALE, 386 NFSERR_BADHANDLE, 387 NFSERR_SERVERFAULT, 388 0, 389}; 390 391static short nfsv3err_rmdir[] = { 392 NFSERR_IO, 393 NFSERR_NOENT, 394 NFSERR_IO, 395 NFSERR_ACCES, 396 NFSERR_EXIST, 397 NFSERR_NOTDIR, 398 NFSERR_INVAL, 399 NFSERR_ROFS, 400 NFSERR_NAMETOL, 401 NFSERR_NOTEMPTY, 402 NFSERR_STALE, 403 NFSERR_BADHANDLE, 404 NFSERR_NOTSUPP, 405 NFSERR_SERVERFAULT, 406 0, 407}; 408 409static short nfsv3err_rename[] = { 410 NFSERR_IO, 411 NFSERR_NOENT, 412 NFSERR_IO, 413 NFSERR_ACCES, 414 NFSERR_EXIST, 415 NFSERR_XDEV, 416 NFSERR_NOTDIR, 417 NFSERR_ISDIR, 418 NFSERR_INVAL, 419 NFSERR_NOSPC, 420 NFSERR_ROFS, 421 NFSERR_MLINK, 422 NFSERR_NAMETOL, 423 NFSERR_NOTEMPTY, 424 NFSERR_DQUOT, 425 NFSERR_STALE, 426 NFSERR_BADHANDLE, 427 NFSERR_NOTSUPP, 428 NFSERR_SERVERFAULT, 429 0, 430}; 431 432static short nfsv3err_link[] = { 433 NFSERR_IO, 434 NFSERR_IO, 435 NFSERR_ACCES, 436 NFSERR_EXIST, 437 NFSERR_XDEV, 438 NFSERR_NOTDIR, 439 NFSERR_INVAL, 440 NFSERR_NOSPC, 441 NFSERR_ROFS, 442 NFSERR_MLINK, 443 NFSERR_NAMETOL, 444 NFSERR_DQUOT, 445 NFSERR_STALE, 446 NFSERR_BADHANDLE, 447 NFSERR_NOTSUPP, 448 NFSERR_SERVERFAULT, 449 0, 450}; 451 452static short nfsv3err_readdir[] = { 453 NFSERR_IO, 454 NFSERR_IO, 455 NFSERR_ACCES, 456 NFSERR_NOTDIR, 457 NFSERR_STALE, 458 NFSERR_BADHANDLE, 459 NFSERR_BAD_COOKIE, 460 NFSERR_TOOSMALL, 461 NFSERR_SERVERFAULT, 462 0, 463}; 464 465static short nfsv3err_readdirplus[] = { 466 NFSERR_IO, 467 NFSERR_IO, 468 NFSERR_ACCES, 469 NFSERR_NOTDIR, 470 NFSERR_STALE, 471 NFSERR_BADHANDLE, 472 NFSERR_BAD_COOKIE, 473 NFSERR_NOTSUPP, 474 NFSERR_TOOSMALL, 475 NFSERR_SERVERFAULT, 476 0, 477}; 478 479static short nfsv3err_fsstat[] = { 480 NFSERR_IO, 481 NFSERR_IO, 482 NFSERR_STALE, 483 NFSERR_BADHANDLE, 484 NFSERR_SERVERFAULT, 485 0, 486}; 487 488static short nfsv3err_fsinfo[] = { 489 NFSERR_STALE, 490 NFSERR_STALE, 491 NFSERR_BADHANDLE, 492 NFSERR_SERVERFAULT, 493 0, 494}; 495 496static short nfsv3err_pathconf[] = { 497 NFSERR_STALE, 498 NFSERR_STALE, 499 NFSERR_BADHANDLE, 500 NFSERR_SERVERFAULT, 501 0, 502}; 503 504static short nfsv3err_commit[] = { 505 NFSERR_IO, 506 NFSERR_IO, 507 NFSERR_STALE, 508 NFSERR_BADHANDLE, 509 NFSERR_SERVERFAULT, 510 0, 511}; 512 513static short *nfsrv_v3errmap[] = { 514 nfsv3err_null, 515 nfsv3err_getattr, 516 nfsv3err_setattr, 517 nfsv3err_lookup, 518 nfsv3err_access, 519 nfsv3err_readlink, 520 nfsv3err_read, 521 nfsv3err_write, 522 nfsv3err_create, 523 nfsv3err_mkdir, 524 nfsv3err_symlink, 525 nfsv3err_mknod, 526 nfsv3err_remove, 527 nfsv3err_rmdir, 528 nfsv3err_rename, 529 nfsv3err_link, 530 nfsv3err_readdir, 531 nfsv3err_readdirplus, 532 nfsv3err_fsstat, 533 nfsv3err_fsinfo, 534 nfsv3err_pathconf, 535 nfsv3err_commit, 536}; 537 538#endif /* NFS_NOSERVER */ 539 540extern struct nfsrtt nfsrtt; 541extern time_t nqnfsstarttime; 542extern int nqsrv_clockskew; 543extern int nqsrv_writeslack; 544extern int nqsrv_maxlease; 545extern struct nfsstats nfsstats; 546extern int nqnfs_piggy[NFS_NPROCS]; 547extern nfstype nfsv2_type[9]; 548extern nfstype nfsv3_type[9]; 549extern struct nfsnodehashhead *nfsnodehashtbl; 550extern u_long nfsnodehash; 551 552struct getfh_args; 553extern int getfh(struct proc *, struct getfh_args *, int *); 554struct nfssvc_args; 555extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 556 557LIST_HEAD(nfsnodehashhead, nfsnode); 558 559int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 560 561u_quad_t 562nfs_curusec() 563{ 564 struct timeval tv; 565 566 getmicrotime(&tv); 567 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 568} 569 570/* 571 * Create the header for an rpc request packet 572 * The hsiz is the size of the rest of the nfs request header. 573 * (just used to decide if a cluster is a good idea) 574 */ 575struct mbuf * 576nfsm_reqh(vp, procid, hsiz, bposp) 577 struct vnode *vp; 578 u_long procid; 579 int hsiz; 580 caddr_t *bposp; 581{ 582 register struct mbuf *mb; 583 register u_long *tl; 584 register caddr_t bpos; 585 struct mbuf *mb2; 586 struct nfsmount *nmp; 587 int nqflag; 588 589 MGET(mb, M_WAIT, MT_DATA); 590 if (hsiz >= MINCLSIZE) 591 MCLGET(mb, M_WAIT); 592 mb->m_len = 0; 593 bpos = mtod(mb, caddr_t); 594 595 /* 596 * For NQNFS, add lease request. 597 */ 598 if (vp) { 599 nmp = VFSTONFS(vp->v_mount); 600 if (nmp->nm_flag & NFSMNT_NQNFS) { 601 nqflag = NQNFS_NEEDLEASE(vp, procid); 602 if (nqflag) { 603 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 604 *tl++ = txdr_unsigned(nqflag); 605 *tl = txdr_unsigned(nmp->nm_leaseterm); 606 } else { 607 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 608 *tl = 0; 609 } 610 } 611 } 612 /* Finally, return values */ 613 *bposp = bpos; 614 return (mb); 615} 616 617/* 618 * Build the RPC header and fill in the authorization info. 619 * The authorization string argument is only used when the credentials 620 * come from outside of the kernel. 621 * Returns the head of the mbuf list. 622 */ 623struct mbuf * 624nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 625 verf_str, mrest, mrest_len, mbp, xidp) 626 register struct ucred *cr; 627 int nmflag; 628 int procid; 629 int auth_type; 630 int auth_len; 631 char *auth_str; 632 int verf_len; 633 char *verf_str; 634 struct mbuf *mrest; 635 int mrest_len; 636 struct mbuf **mbp; 637 u_long *xidp; 638{ 639 register struct mbuf *mb; 640 register u_long *tl; 641 register caddr_t bpos; 642 register int i; 643 struct mbuf *mreq, *mb2; 644 int siz, grpsiz, authsiz; 645 static u_long base; 646 647 authsiz = nfsm_rndup(auth_len); 648 MGETHDR(mb, M_WAIT, MT_DATA); 649 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 650 MCLGET(mb, M_WAIT); 651 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 652 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 653 } else { 654 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 655 } 656 mb->m_len = 0; 657 mreq = mb; 658 bpos = mtod(mb, caddr_t); 659 660 /* 661 * First the RPC header. 662 */ 663 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 664 665 /* Get a pretty random xid to start with */ 666 if (!nfs_xid) 667 nfs_xid = random(); 668 /* 669 * Skip zero xid if it should ever happen. 670 */ 671 if (++nfs_xid == 0) 672 nfs_xid++; 673 674 *tl++ = *xidp = txdr_unsigned(nfs_xid); 675 *tl++ = rpc_call; 676 *tl++ = rpc_vers; 677 if (nmflag & NFSMNT_NQNFS) { 678 *tl++ = txdr_unsigned(NQNFS_PROG); 679 *tl++ = txdr_unsigned(NQNFS_VER3); 680 } else { 681 *tl++ = txdr_unsigned(NFS_PROG); 682 if (nmflag & NFSMNT_NFSV3) 683 *tl++ = txdr_unsigned(NFS_VER3); 684 else 685 *tl++ = txdr_unsigned(NFS_VER2); 686 } 687 if (nmflag & NFSMNT_NFSV3) 688 *tl++ = txdr_unsigned(procid); 689 else 690 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 691 692 /* 693 * And then the authorization cred. 694 */ 695 *tl++ = txdr_unsigned(auth_type); 696 *tl = txdr_unsigned(authsiz); 697 switch (auth_type) { 698 case RPCAUTH_UNIX: 699 nfsm_build(tl, u_long *, auth_len); 700 *tl++ = 0; /* stamp ?? */ 701 *tl++ = 0; /* NULL hostname */ 702 *tl++ = txdr_unsigned(cr->cr_uid); 703 *tl++ = txdr_unsigned(cr->cr_groups[0]); 704 grpsiz = (auth_len >> 2) - 5; 705 *tl++ = txdr_unsigned(grpsiz); 706 for (i = 1; i <= grpsiz; i++) 707 *tl++ = txdr_unsigned(cr->cr_groups[i]); 708 break; 709 case RPCAUTH_KERB4: 710 siz = auth_len; 711 while (siz > 0) { 712 if (M_TRAILINGSPACE(mb) == 0) { 713 MGET(mb2, M_WAIT, MT_DATA); 714 if (siz >= MINCLSIZE) 715 MCLGET(mb2, M_WAIT); 716 mb->m_next = mb2; 717 mb = mb2; 718 mb->m_len = 0; 719 bpos = mtod(mb, caddr_t); 720 } 721 i = min(siz, M_TRAILINGSPACE(mb)); 722 bcopy(auth_str, bpos, i); 723 mb->m_len += i; 724 auth_str += i; 725 bpos += i; 726 siz -= i; 727 } 728 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 729 for (i = 0; i < siz; i++) 730 *bpos++ = '\0'; 731 mb->m_len += siz; 732 } 733 break; 734 }; 735 736 /* 737 * And the verifier... 738 */ 739 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 740 if (verf_str) { 741 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 742 *tl = txdr_unsigned(verf_len); 743 siz = verf_len; 744 while (siz > 0) { 745 if (M_TRAILINGSPACE(mb) == 0) { 746 MGET(mb2, M_WAIT, MT_DATA); 747 if (siz >= MINCLSIZE) 748 MCLGET(mb2, M_WAIT); 749 mb->m_next = mb2; 750 mb = mb2; 751 mb->m_len = 0; 752 bpos = mtod(mb, caddr_t); 753 } 754 i = min(siz, M_TRAILINGSPACE(mb)); 755 bcopy(verf_str, bpos, i); 756 mb->m_len += i; 757 verf_str += i; 758 bpos += i; 759 siz -= i; 760 } 761 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 762 for (i = 0; i < siz; i++) 763 *bpos++ = '\0'; 764 mb->m_len += siz; 765 } 766 } else { 767 *tl++ = txdr_unsigned(RPCAUTH_NULL); 768 *tl = 0; 769 } 770 mb->m_next = mrest; 771 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 772 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 773 *mbp = mb; 774 return (mreq); 775} 776 777/* 778 * copies mbuf chain to the uio scatter/gather list 779 */ 780int 781nfsm_mbuftouio(mrep, uiop, siz, dpos) 782 struct mbuf **mrep; 783 register struct uio *uiop; 784 int siz; 785 caddr_t *dpos; 786{ 787 register char *mbufcp, *uiocp; 788 register int xfer, left, len; 789 register struct mbuf *mp; 790 long uiosiz, rem; 791 int error = 0; 792 793 mp = *mrep; 794 mbufcp = *dpos; 795 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 796 rem = nfsm_rndup(siz)-siz; 797 while (siz > 0) { 798 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 799 return (EFBIG); 800 left = uiop->uio_iov->iov_len; 801 uiocp = uiop->uio_iov->iov_base; 802 if (left > siz) 803 left = siz; 804 uiosiz = left; 805 while (left > 0) { 806 while (len == 0) { 807 mp = mp->m_next; 808 if (mp == NULL) 809 return (EBADRPC); 810 mbufcp = mtod(mp, caddr_t); 811 len = mp->m_len; 812 } 813 xfer = (left > len) ? len : left; 814#ifdef notdef 815 /* Not Yet.. */ 816 if (uiop->uio_iov->iov_op != NULL) 817 (*(uiop->uio_iov->iov_op)) 818 (mbufcp, uiocp, xfer); 819 else 820#endif 821 if (uiop->uio_segflg == UIO_SYSSPACE) 822 bcopy(mbufcp, uiocp, xfer); 823 else 824 copyout(mbufcp, uiocp, xfer); 825 left -= xfer; 826 len -= xfer; 827 mbufcp += xfer; 828 uiocp += xfer; 829 uiop->uio_offset += xfer; 830 uiop->uio_resid -= xfer; 831 } 832 if (uiop->uio_iov->iov_len <= siz) { 833 uiop->uio_iovcnt--; 834 uiop->uio_iov++; 835 } else { 836 uiop->uio_iov->iov_base += uiosiz; 837 uiop->uio_iov->iov_len -= uiosiz; 838 } 839 siz -= uiosiz; 840 } 841 *dpos = mbufcp; 842 *mrep = mp; 843 if (rem > 0) { 844 if (len < rem) 845 error = nfs_adv(mrep, dpos, rem, len); 846 else 847 *dpos += rem; 848 } 849 return (error); 850} 851 852/* 853 * copies a uio scatter/gather list to an mbuf chain. 854 * NOTE: can ony handle iovcnt == 1 855 */ 856int 857nfsm_uiotombuf(uiop, mq, siz, bpos) 858 register struct uio *uiop; 859 struct mbuf **mq; 860 int siz; 861 caddr_t *bpos; 862{ 863 register char *uiocp; 864 register struct mbuf *mp, *mp2; 865 register int xfer, left, mlen; 866 int uiosiz, clflg, rem; 867 char *cp; 868 869#ifdef DIAGNOSTIC 870 if (uiop->uio_iovcnt != 1) 871 panic("nfsm_uiotombuf: iovcnt != 1"); 872#endif 873 874 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 875 clflg = 1; 876 else 877 clflg = 0; 878 rem = nfsm_rndup(siz)-siz; 879 mp = mp2 = *mq; 880 while (siz > 0) { 881 left = uiop->uio_iov->iov_len; 882 uiocp = uiop->uio_iov->iov_base; 883 if (left > siz) 884 left = siz; 885 uiosiz = left; 886 while (left > 0) { 887 mlen = M_TRAILINGSPACE(mp); 888 if (mlen == 0) { 889 MGET(mp, M_WAIT, MT_DATA); 890 if (clflg) 891 MCLGET(mp, M_WAIT); 892 mp->m_len = 0; 893 mp2->m_next = mp; 894 mp2 = mp; 895 mlen = M_TRAILINGSPACE(mp); 896 } 897 xfer = (left > mlen) ? mlen : left; 898#ifdef notdef 899 /* Not Yet.. */ 900 if (uiop->uio_iov->iov_op != NULL) 901 (*(uiop->uio_iov->iov_op)) 902 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 903 else 904#endif 905 if (uiop->uio_segflg == UIO_SYSSPACE) 906 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 907 else 908 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 909 mp->m_len += xfer; 910 left -= xfer; 911 uiocp += xfer; 912 uiop->uio_offset += xfer; 913 uiop->uio_resid -= xfer; 914 } 915 uiop->uio_iov->iov_base += uiosiz; 916 uiop->uio_iov->iov_len -= uiosiz; 917 siz -= uiosiz; 918 } 919 if (rem > 0) { 920 if (rem > M_TRAILINGSPACE(mp)) { 921 MGET(mp, M_WAIT, MT_DATA); 922 mp->m_len = 0; 923 mp2->m_next = mp; 924 } 925 cp = mtod(mp, caddr_t)+mp->m_len; 926 for (left = 0; left < rem; left++) 927 *cp++ = '\0'; 928 mp->m_len += rem; 929 *bpos = cp; 930 } else 931 *bpos = mtod(mp, caddr_t)+mp->m_len; 932 *mq = mp; 933 return (0); 934} 935 936/* 937 * Help break down an mbuf chain by setting the first siz bytes contiguous 938 * pointed to by returned val. 939 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 940 * cases. (The macros use the vars. dpos and dpos2) 941 */ 942int 943nfsm_disct(mdp, dposp, siz, left, cp2) 944 struct mbuf **mdp; 945 caddr_t *dposp; 946 int siz; 947 int left; 948 caddr_t *cp2; 949{ 950 register struct mbuf *mp, *mp2; 951 register int siz2, xfer; 952 register caddr_t p; 953 954 mp = *mdp; 955 while (left == 0) { 956 *mdp = mp = mp->m_next; 957 if (mp == NULL) 958 return (EBADRPC); 959 left = mp->m_len; 960 *dposp = mtod(mp, caddr_t); 961 } 962 if (left >= siz) { 963 *cp2 = *dposp; 964 *dposp += siz; 965 } else if (mp->m_next == NULL) { 966 return (EBADRPC); 967 } else if (siz > MHLEN) { 968 panic("nfs S too big"); 969 } else { 970 MGET(mp2, M_WAIT, MT_DATA); 971 mp2->m_next = mp->m_next; 972 mp->m_next = mp2; 973 mp->m_len -= left; 974 mp = mp2; 975 *cp2 = p = mtod(mp, caddr_t); 976 bcopy(*dposp, p, left); /* Copy what was left */ 977 siz2 = siz-left; 978 p += left; 979 mp2 = mp->m_next; 980 /* Loop around copying up the siz2 bytes */ 981 while (siz2 > 0) { 982 if (mp2 == NULL) 983 return (EBADRPC); 984 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 985 if (xfer > 0) { 986 bcopy(mtod(mp2, caddr_t), p, xfer); 987 NFSMADV(mp2, xfer); 988 mp2->m_len -= xfer; 989 p += xfer; 990 siz2 -= xfer; 991 } 992 if (siz2 > 0) 993 mp2 = mp2->m_next; 994 } 995 mp->m_len = siz; 996 *mdp = mp2; 997 *dposp = mtod(mp2, caddr_t); 998 } 999 return (0); 1000} 1001 1002/* 1003 * Advance the position in the mbuf chain. 1004 */ 1005int 1006nfs_adv(mdp, dposp, offs, left) 1007 struct mbuf **mdp; 1008 caddr_t *dposp; 1009 int offs; 1010 int left; 1011{ 1012 register struct mbuf *m; 1013 register int s; 1014 1015 m = *mdp; 1016 s = left; 1017 while (s < offs) { 1018 offs -= s; 1019 m = m->m_next; 1020 if (m == NULL) 1021 return (EBADRPC); 1022 s = m->m_len; 1023 } 1024 *mdp = m; 1025 *dposp = mtod(m, caddr_t)+offs; 1026 return (0); 1027} 1028 1029/* 1030 * Copy a string into mbufs for the hard cases... 1031 */ 1032int 1033nfsm_strtmbuf(mb, bpos, cp, siz) 1034 struct mbuf **mb; 1035 char **bpos; 1036 const char *cp; 1037 long siz; 1038{ 1039 register struct mbuf *m1 = NULL, *m2; 1040 long left, xfer, len, tlen; 1041 u_long *tl; 1042 int putsize; 1043 1044 putsize = 1; 1045 m2 = *mb; 1046 left = M_TRAILINGSPACE(m2); 1047 if (left > 0) { 1048 tl = ((u_long *)(*bpos)); 1049 *tl++ = txdr_unsigned(siz); 1050 putsize = 0; 1051 left -= NFSX_UNSIGNED; 1052 m2->m_len += NFSX_UNSIGNED; 1053 if (left > 0) { 1054 bcopy(cp, (caddr_t) tl, left); 1055 siz -= left; 1056 cp += left; 1057 m2->m_len += left; 1058 left = 0; 1059 } 1060 } 1061 /* Loop around adding mbufs */ 1062 while (siz > 0) { 1063 MGET(m1, M_WAIT, MT_DATA); 1064 if (siz > MLEN) 1065 MCLGET(m1, M_WAIT); 1066 m1->m_len = NFSMSIZ(m1); 1067 m2->m_next = m1; 1068 m2 = m1; 1069 tl = mtod(m1, u_long *); 1070 tlen = 0; 1071 if (putsize) { 1072 *tl++ = txdr_unsigned(siz); 1073 m1->m_len -= NFSX_UNSIGNED; 1074 tlen = NFSX_UNSIGNED; 1075 putsize = 0; 1076 } 1077 if (siz < m1->m_len) { 1078 len = nfsm_rndup(siz); 1079 xfer = siz; 1080 if (xfer < len) 1081 *(tl+(xfer>>2)) = 0; 1082 } else { 1083 xfer = len = m1->m_len; 1084 } 1085 bcopy(cp, (caddr_t) tl, xfer); 1086 m1->m_len = len+tlen; 1087 siz -= xfer; 1088 cp += xfer; 1089 } 1090 *mb = m1; 1091 *bpos = mtod(m1, caddr_t)+m1->m_len; 1092 return (0); 1093} 1094 1095/* 1096 * Called once to initialize data structures... 1097 */ 1098int 1099nfs_init(vfsp) 1100 struct vfsconf *vfsp; 1101{ 1102 register int i; 1103 1104 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1105 1106 /* 1107 * Check to see if major data structures haven't bloated. 1108 */ 1109 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1110 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1111 printf("Try reducing NFS_UIDHASHSIZ\n"); 1112 } 1113 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1114 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1115 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1116 } 1117 nfs_mount_type = vfsp->vfc_typenum; 1118 nfsrtt.pos = 0; 1119 rpc_vers = txdr_unsigned(RPC_VER2); 1120 rpc_call = txdr_unsigned(RPC_CALL); 1121 rpc_reply = txdr_unsigned(RPC_REPLY); 1122 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1123 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1124 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1125 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1126 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1127 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1128 nfs_prog = txdr_unsigned(NFS_PROG); 1129 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1130 nfs_true = txdr_unsigned(TRUE); 1131 nfs_false = txdr_unsigned(FALSE); 1132 nfs_xdrneg1 = txdr_unsigned(-1); 1133 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1134 if (nfs_ticks < 1) 1135 nfs_ticks = 1; 1136 /* Ensure async daemons disabled */ 1137 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1138 nfs_iodwant[i] = (struct proc *)0; 1139 nfs_iodmount[i] = (struct nfsmount *)0; 1140 } 1141 nfs_nhinit(); /* Init the nfsnode table */ 1142#ifndef NFS_NOSERVER 1143 nfsrv_init(0); /* Init server data structures */ 1144 nfsrv_initcache(); /* Init the server request cache */ 1145#endif 1146 1147 /* 1148 * Initialize the nqnfs server stuff. 1149 */ 1150 if (nqnfsstarttime == 0) { 1151 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1152 + nqsrv_clockskew + nqsrv_writeslack; 1153 NQLOADNOVRAM(nqnfsstarttime); 1154 CIRCLEQ_INIT(&nqtimerhead); 1155 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1156 } 1157 1158 /* 1159 * Initialize reply list and start timer 1160 */ 1161 TAILQ_INIT(&nfs_reqq); 1162 1163 nfs_timer(0); 1164 1165 1166 /* 1167 * Set up lease_check and lease_updatetime so that other parts 1168 * of the system can call us, if we are loadable. 1169 */ 1170#ifndef NFS_NOSERVER 1171 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1172#endif 1173 lease_updatetime = nfs_lease_updatetime; 1174 vfsp->vfc_refcount++; /* make us non-unloadable */ 1175 sysent[SYS_nfssvc].sy_narg = 2; 1176 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1177#ifndef NFS_NOSERVER 1178 sysent[SYS_getfh].sy_narg = 2; 1179 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1180#endif 1181 1182 return (0); 1183} 1184 1185/* 1186 * Attribute cache routines. 1187 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1188 * that are on the mbuf list 1189 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1190 * error otherwise 1191 */ 1192 1193/* 1194 * Load the attribute cache (that lives in the nfsnode entry) with 1195 * the values on the mbuf list and 1196 * Iff vap not NULL 1197 * copy the attributes to *vaper 1198 */ 1199int 1200nfs_loadattrcache(vpp, mdp, dposp, vaper) 1201 struct vnode **vpp; 1202 struct mbuf **mdp; 1203 caddr_t *dposp; 1204 struct vattr *vaper; 1205{ 1206 register struct vnode *vp = *vpp; 1207 register struct vattr *vap; 1208 register struct nfs_fattr *fp; 1209 register struct nfsnode *np; 1210 register long t1; 1211 caddr_t cp2; 1212 int error = 0, rdev; 1213 struct mbuf *md; 1214 enum vtype vtyp; 1215 u_short vmode; 1216 struct timespec mtime; 1217 struct vnode *nvp; 1218 int v3 = NFS_ISV3(vp); 1219 1220 md = *mdp; 1221 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1222 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1223 return (error); 1224 fp = (struct nfs_fattr *)cp2; 1225 if (v3) { 1226 vtyp = nfsv3tov_type(fp->fa_type); 1227 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1228 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1229 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1230 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1231 } else { 1232 vtyp = nfsv2tov_type(fp->fa_type); 1233 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1234 /* 1235 * XXX 1236 * 1237 * The duplicate information returned in fa_type and fa_mode 1238 * is an ambiguity in the NFS version 2 protocol. 1239 * 1240 * VREG should be taken literally as a regular file. If a 1241 * server intents to return some type information differently 1242 * in the upper bits of the mode field (e.g. for sockets, or 1243 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1244 * leave the examination of the mode bits even in the VREG 1245 * case to avoid breakage for bogus servers, but we make sure 1246 * that there are actually type bits set in the upper part of 1247 * fa_mode (and failing that, trust the va_type field). 1248 * 1249 * NFSv3 cleared the issue, and requires fa_mode to not 1250 * contain any type information (while also introduing sockets 1251 * and FIFOs for fa_type). 1252 */ 1253 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1254 vtyp = IFTOVT(vmode); 1255 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1256 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1257 1258 /* 1259 * Really ugly NFSv2 kludge. 1260 */ 1261 if (vtyp == VCHR && rdev == 0xffffffff) 1262 vtyp = VFIFO; 1263 } 1264 1265 /* 1266 * If v_type == VNON it is a new node, so fill in the v_type, 1267 * n_mtime fields. Check to see if it represents a special 1268 * device, and if so, check for a possible alias. Once the 1269 * correct vnode has been obtained, fill in the rest of the 1270 * information. 1271 */ 1272 np = VTONFS(vp); 1273 if (vp->v_type != vtyp) { 1274 vp->v_type = vtyp; 1275 if (vp->v_type == VFIFO) { 1276 vp->v_op = fifo_nfsv2nodeop_p; 1277 } 1278 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1279 vp->v_op = spec_nfsv2nodeop_p; 1280 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1281 if (nvp) { 1282 /* 1283 * Discard unneeded vnode, but save its nfsnode. 1284 * Since the nfsnode does not have a lock, its 1285 * vnode lock has to be carried over. 1286 */ 1287 nvp->v_vnlock = vp->v_vnlock; 1288 vp->v_vnlock = NULL; 1289 nvp->v_data = vp->v_data; 1290 vp->v_data = NULL; 1291 vp->v_op = spec_vnodeop_p; 1292 vrele(vp); 1293 vgone(vp); 1294 /* 1295 * Reinitialize aliased node. 1296 */ 1297 np->n_vnode = nvp; 1298 *vpp = vp = nvp; 1299 } 1300 } 1301 np->n_mtime = mtime.tv_sec; 1302 } 1303 vap = &np->n_vattr; 1304 vap->va_type = vtyp; 1305 vap->va_mode = (vmode & 07777); 1306 vap->va_rdev = (dev_t)rdev; 1307 vap->va_mtime = mtime; 1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1309 if (v3) { 1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1313 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1314 vap->va_blocksize = NFS_FABLKSIZE; 1315 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1316 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1317 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1318 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1319 vap->va_flags = 0; 1320 vap->va_filerev = 0; 1321 } else { 1322 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1323 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1324 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1325 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1326 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1327 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1328 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1329 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1330 vap->va_flags = 0; 1331 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1332 vap->va_ctime.tv_nsec = 0; 1333 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1334 vap->va_filerev = 0; 1335 } 1336 if (vap->va_size != np->n_size) { 1337 if (vap->va_type == VREG) { 1338 if (np->n_flag & NMODIFIED) { 1339 if (vap->va_size < np->n_size) 1340 vap->va_size = np->n_size; 1341 else 1342 np->n_size = vap->va_size; 1343 } else 1344 np->n_size = vap->va_size; 1345 vnode_pager_setsize(vp, (u_long)np->n_size); 1346 } else 1347 np->n_size = vap->va_size; 1348 } 1349 np->n_attrstamp = time_second; 1350 if (vaper != NULL) { 1351 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1352 if (np->n_flag & NCHG) { 1353 if (np->n_flag & NACC) 1354 vaper->va_atime = np->n_atim; 1355 if (np->n_flag & NUPD) 1356 vaper->va_mtime = np->n_mtim; 1357 } 1358 } 1359 return (0); 1360} 1361 1362#ifdef NFS_ACDEBUG 1363#include <sys/sysctl.h> 1364static int nfs_acdebug; 1365SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1366#endif 1367 1368/* 1369 * Check the time stamp 1370 * If the cache is valid, copy contents to *vap and return 0 1371 * otherwise return an error 1372 */ 1373int 1374nfs_getattrcache(vp, vaper) 1375 register struct vnode *vp; 1376 struct vattr *vaper; 1377{ 1378 register struct nfsnode *np; 1379 register struct vattr *vap; 1380 struct nfsmount *nmp; 1381 int timeo; 1382 1383 np = VTONFS(vp); 1384 vap = &np->n_vattr; 1385 nmp = VFSTONFS(vp->v_mount); 1386 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1387 timeo = (time_second - np->n_mtime) / 10; 1388 1389#ifdef NFS_ACDEBUG 1390 if (nfs_acdebug>1) 1391 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1392#endif 1393 1394 if (vap->va_type == VDIR) { 1395 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1396 timeo = nmp->nm_acdirmin; 1397 else if (timeo > nmp->nm_acdirmax) 1398 timeo = nmp->nm_acdirmax; 1399 } else { 1400 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1401 timeo = nmp->nm_acregmin; 1402 else if (timeo > nmp->nm_acregmax) 1403 timeo = nmp->nm_acregmax; 1404 } 1405 1406#ifdef NFS_ACDEBUG 1407 if (nfs_acdebug > 2) 1408 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1409 nmp->nm_acregmin, nmp->nm_acregmax, 1410 nmp->nm_acdirmin, nmp->nm_acdirmax); 1411 1412 if (nfs_acdebug) 1413 printf("nfs_getattrcache: age = %d; final timeo = %d\n",r 1414 (time_second - np->n_attrstamp), timeo); 1415#endif 1416 1417 if ((time_second - np->n_attrstamp) >= timeo) { 1418 nfsstats.attrcache_misses++; 1419 return (ENOENT); 1420 } 1421 nfsstats.attrcache_hits++; 1422 if (vap->va_size != np->n_size) { 1423 if (vap->va_type == VREG) { 1424 if (np->n_flag & NMODIFIED) { 1425 if (vap->va_size < np->n_size) 1426 vap->va_size = np->n_size; 1427 else 1428 np->n_size = vap->va_size; 1429 } else 1430 np->n_size = vap->va_size; 1431 vnode_pager_setsize(vp, (u_long)np->n_size); 1432 } else 1433 np->n_size = vap->va_size; 1434 } 1435 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1436 if (np->n_flag & NCHG) { 1437 if (np->n_flag & NACC) 1438 vaper->va_atime = np->n_atim; 1439 if (np->n_flag & NUPD) 1440 vaper->va_mtime = np->n_mtim; 1441 } 1442 return (0); 1443} 1444 1445#ifndef NFS_NOSERVER 1446/* 1447 * Set up nameidata for a lookup() call and do it. 1448 * 1449 * If pubflag is set, this call is done for a lookup operation on the 1450 * public filehandle. In that case we allow crossing mountpoints and 1451 * absolute pathnames. However, the caller is expected to check that 1452 * the lookup result is within the public fs, and deny access if 1453 * it is not. 1454 */ 1455int 1456nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1457 register struct nameidata *ndp; 1458 fhandle_t *fhp; 1459 int len; 1460 struct nfssvc_sock *slp; 1461 struct sockaddr *nam; 1462 struct mbuf **mdp; 1463 caddr_t *dposp; 1464 struct vnode **retdirp; 1465 struct proc *p; 1466 int kerbflag, pubflag; 1467{ 1468 register int i, rem; 1469 register struct mbuf *md; 1470 register char *fromcp, *tocp, *cp; 1471 struct iovec aiov; 1472 struct uio auio; 1473 struct vnode *dp; 1474 int error, rdonly, linklen; 1475 struct componentname *cnp = &ndp->ni_cnd; 1476 1477 *retdirp = (struct vnode *)0; 1478 cnp->cn_pnbuf = zalloc(namei_zone); 1479 1480 /* 1481 * Copy the name from the mbuf list to ndp->ni_pnbuf 1482 * and set the various ndp fields appropriately. 1483 */ 1484 fromcp = *dposp; 1485 tocp = cnp->cn_pnbuf; 1486 md = *mdp; 1487 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1488 cnp->cn_hash = 0; 1489 for (i = 0; i < len; i++) { 1490 while (rem == 0) { 1491 md = md->m_next; 1492 if (md == NULL) { 1493 error = EBADRPC; 1494 goto out; 1495 } 1496 fromcp = mtod(md, caddr_t); 1497 rem = md->m_len; 1498 } 1499 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1500 error = EACCES; 1501 goto out; 1502 } 1503 cnp->cn_hash += (unsigned char)*fromcp; 1504 *tocp++ = *fromcp++; 1505 rem--; 1506 } 1507 *tocp = '\0'; 1508 *mdp = md; 1509 *dposp = fromcp; 1510 len = nfsm_rndup(len)-len; 1511 if (len > 0) { 1512 if (rem >= len) 1513 *dposp += len; 1514 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1515 goto out; 1516 } 1517 1518 /* 1519 * Extract and set starting directory. 1520 */ 1521 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1522 nam, &rdonly, kerbflag, pubflag); 1523 if (error) 1524 goto out; 1525 if (dp->v_type != VDIR) { 1526 vrele(dp); 1527 error = ENOTDIR; 1528 goto out; 1529 } 1530 1531 if (rdonly) 1532 cnp->cn_flags |= RDONLY; 1533 1534 *retdirp = dp; 1535 1536 if (pubflag) { 1537 /* 1538 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1539 * and the 'native path' indicator. 1540 */ 1541 cp = zalloc(namei_zone); 1542 fromcp = cnp->cn_pnbuf; 1543 tocp = cp; 1544 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1545 switch ((unsigned char)*fromcp) { 1546 case WEBNFS_NATIVE_CHAR: 1547 /* 1548 * 'Native' path for us is the same 1549 * as a path according to the NFS spec, 1550 * just skip the escape char. 1551 */ 1552 fromcp++; 1553 break; 1554 /* 1555 * More may be added in the future, range 0x80-0xff 1556 */ 1557 default: 1558 error = EIO; 1559 zfree(namei_zone, cp); 1560 goto out; 1561 } 1562 } 1563 /* 1564 * Translate the '%' escapes, URL-style. 1565 */ 1566 while (*fromcp != '\0') { 1567 if (*fromcp == WEBNFS_ESC_CHAR) { 1568 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1569 fromcp++; 1570 *tocp++ = HEXSTRTOI(fromcp); 1571 fromcp += 2; 1572 continue; 1573 } else { 1574 error = ENOENT; 1575 zfree(namei_zone, cp); 1576 goto out; 1577 } 1578 } else 1579 *tocp++ = *fromcp++; 1580 } 1581 *tocp = '\0'; 1582 zfree(namei_zone, cnp->cn_pnbuf); 1583 cnp->cn_pnbuf = cp; 1584 } 1585 1586 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1587 ndp->ni_segflg = UIO_SYSSPACE; 1588 1589 if (pubflag) { 1590 ndp->ni_rootdir = rootvnode; 1591 ndp->ni_loopcnt = 0; 1592 if (cnp->cn_pnbuf[0] == '/') 1593 dp = rootvnode; 1594 } else { 1595 cnp->cn_flags |= NOCROSSMOUNT; 1596 } 1597 1598 cnp->cn_proc = p; 1599 VREF(dp); 1600 1601 for (;;) { 1602 cnp->cn_nameptr = cnp->cn_pnbuf; 1603 ndp->ni_startdir = dp; 1604 /* 1605 * And call lookup() to do the real work 1606 */ 1607 error = lookup(ndp); 1608 if (error) 1609 break; 1610 /* 1611 * Check for encountering a symbolic link 1612 */ 1613 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1614 nfsrv_object_create(ndp->ni_vp); 1615 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1616 cnp->cn_flags |= HASBUF; 1617 return (0); 1618 } 1619 break; 1620 } else { 1621 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1622 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1623 if (!pubflag) { 1624 vrele(ndp->ni_dvp); 1625 vput(ndp->ni_vp); 1626 ndp->ni_vp = NULL; 1627 error = EINVAL; 1628 break; 1629 } 1630 1631 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1632 error = ELOOP; 1633 break; 1634 } 1635 if (ndp->ni_pathlen > 1) 1636 cp = zalloc(namei_zone); 1637 else 1638 cp = cnp->cn_pnbuf; 1639 aiov.iov_base = cp; 1640 aiov.iov_len = MAXPATHLEN; 1641 auio.uio_iov = &aiov; 1642 auio.uio_iovcnt = 1; 1643 auio.uio_offset = 0; 1644 auio.uio_rw = UIO_READ; 1645 auio.uio_segflg = UIO_SYSSPACE; 1646 auio.uio_procp = (struct proc *)0; 1647 auio.uio_resid = MAXPATHLEN; 1648 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1649 if (error) { 1650 badlink: 1651 if (ndp->ni_pathlen > 1) 1652 zfree(namei_zone, cp); 1653 break; 1654 } 1655 linklen = MAXPATHLEN - auio.uio_resid; 1656 if (linklen == 0) { 1657 error = ENOENT; 1658 goto badlink; 1659 } 1660 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1661 error = ENAMETOOLONG; 1662 goto badlink; 1663 } 1664 if (ndp->ni_pathlen > 1) { 1665 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1666 zfree(namei_zone, cnp->cn_pnbuf); 1667 cnp->cn_pnbuf = cp; 1668 } else 1669 cnp->cn_pnbuf[linklen] = '\0'; 1670 ndp->ni_pathlen += linklen; 1671 vput(ndp->ni_vp); 1672 dp = ndp->ni_dvp; 1673 /* 1674 * Check if root directory should replace current directory. 1675 */ 1676 if (cnp->cn_pnbuf[0] == '/') { 1677 vrele(dp); 1678 dp = ndp->ni_rootdir; 1679 VREF(dp); 1680 } 1681 } 1682 } 1683out: 1684 zfree(namei_zone, cnp->cn_pnbuf); 1685 return (error); 1686} 1687 1688/* 1689 * A fiddled version of m_adj() that ensures null fill to a long 1690 * boundary and only trims off the back end 1691 */ 1692void 1693nfsm_adj(mp, len, nul) 1694 struct mbuf *mp; 1695 register int len; 1696 int nul; 1697{ 1698 register struct mbuf *m; 1699 register int count, i; 1700 register char *cp; 1701 1702 /* 1703 * Trim from tail. Scan the mbuf chain, 1704 * calculating its length and finding the last mbuf. 1705 * If the adjustment only affects this mbuf, then just 1706 * adjust and return. Otherwise, rescan and truncate 1707 * after the remaining size. 1708 */ 1709 count = 0; 1710 m = mp; 1711 for (;;) { 1712 count += m->m_len; 1713 if (m->m_next == (struct mbuf *)0) 1714 break; 1715 m = m->m_next; 1716 } 1717 if (m->m_len > len) { 1718 m->m_len -= len; 1719 if (nul > 0) { 1720 cp = mtod(m, caddr_t)+m->m_len-nul; 1721 for (i = 0; i < nul; i++) 1722 *cp++ = '\0'; 1723 } 1724 return; 1725 } 1726 count -= len; 1727 if (count < 0) 1728 count = 0; 1729 /* 1730 * Correct length for chain is "count". 1731 * Find the mbuf with last data, adjust its length, 1732 * and toss data from remaining mbufs on chain. 1733 */ 1734 for (m = mp; m; m = m->m_next) { 1735 if (m->m_len >= count) { 1736 m->m_len = count; 1737 if (nul > 0) { 1738 cp = mtod(m, caddr_t)+m->m_len-nul; 1739 for (i = 0; i < nul; i++) 1740 *cp++ = '\0'; 1741 } 1742 break; 1743 } 1744 count -= m->m_len; 1745 } 1746 for (m = m->m_next;m;m = m->m_next) 1747 m->m_len = 0; 1748} 1749 1750/* 1751 * Make these functions instead of macros, so that the kernel text size 1752 * doesn't get too big... 1753 */ 1754void 1755nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1756 struct nfsrv_descript *nfsd; 1757 int before_ret; 1758 register struct vattr *before_vap; 1759 int after_ret; 1760 struct vattr *after_vap; 1761 struct mbuf **mbp; 1762 char **bposp; 1763{ 1764 register struct mbuf *mb = *mbp, *mb2; 1765 register char *bpos = *bposp; 1766 register u_long *tl; 1767 1768 if (before_ret) { 1769 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1770 *tl = nfs_false; 1771 } else { 1772 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1773 *tl++ = nfs_true; 1774 txdr_hyper(&(before_vap->va_size), tl); 1775 tl += 2; 1776 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1777 tl += 2; 1778 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1779 } 1780 *bposp = bpos; 1781 *mbp = mb; 1782 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1783} 1784 1785void 1786nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1787 struct nfsrv_descript *nfsd; 1788 int after_ret; 1789 struct vattr *after_vap; 1790 struct mbuf **mbp; 1791 char **bposp; 1792{ 1793 register struct mbuf *mb = *mbp, *mb2; 1794 register char *bpos = *bposp; 1795 register u_long *tl; 1796 register struct nfs_fattr *fp; 1797 1798 if (after_ret) { 1799 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1800 *tl = nfs_false; 1801 } else { 1802 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1803 *tl++ = nfs_true; 1804 fp = (struct nfs_fattr *)tl; 1805 nfsm_srvfattr(nfsd, after_vap, fp); 1806 } 1807 *mbp = mb; 1808 *bposp = bpos; 1809} 1810 1811void 1812nfsm_srvfattr(nfsd, vap, fp) 1813 register struct nfsrv_descript *nfsd; 1814 register struct vattr *vap; 1815 register struct nfs_fattr *fp; 1816{ 1817 1818 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1819 fp->fa_uid = txdr_unsigned(vap->va_uid); 1820 fp->fa_gid = txdr_unsigned(vap->va_gid); 1821 if (nfsd->nd_flag & ND_NFSV3) { 1822 fp->fa_type = vtonfsv3_type(vap->va_type); 1823 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1824 txdr_hyper(&vap->va_size, &fp->fa3_size); 1825 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1826 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1827 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1828 fp->fa3_fsid.nfsuquad[0] = 0; 1829 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1830 fp->fa3_fileid.nfsuquad[0] = 0; 1831 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1832 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1833 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1834 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1835 } else { 1836 fp->fa_type = vtonfsv2_type(vap->va_type); 1837 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1838 fp->fa2_size = txdr_unsigned(vap->va_size); 1839 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1840 if (vap->va_type == VFIFO) 1841 fp->fa2_rdev = 0xffffffff; 1842 else 1843 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1844 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1845 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1846 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1847 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1848 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1849 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1850 } 1851} 1852 1853/* 1854 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1855 * - look up fsid in mount list (if not found ret error) 1856 * - get vp and export rights by calling VFS_FHTOVP() 1857 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1858 * - if not lockflag unlock it with VOP_UNLOCK() 1859 */ 1860int 1861nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1862 fhandle_t *fhp; 1863 int lockflag; 1864 struct vnode **vpp; 1865 struct ucred *cred; 1866 struct nfssvc_sock *slp; 1867 struct sockaddr *nam; 1868 int *rdonlyp; 1869 int kerbflag; 1870 int pubflag; 1871{ 1872 struct proc *p = curproc; /* XXX */ 1873 register struct mount *mp; 1874 register int i; 1875 struct ucred *credanon; 1876 int error, exflags; 1877#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1878 struct sockaddr_int *saddr; 1879#endif 1880 1881 *vpp = (struct vnode *)0; 1882 1883 if (nfs_ispublicfh(fhp)) { 1884 if (!pubflag || !nfs_pub.np_valid) 1885 return (ESTALE); 1886 fhp = &nfs_pub.np_handle; 1887 } 1888 1889 mp = vfs_getvfs(&fhp->fh_fsid); 1890 if (!mp) 1891 return (ESTALE); 1892 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1893 if (error) 1894 return (error); 1895#ifdef MNT_EXNORESPORT 1896 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1897 saddr = (struct sockaddr_in *)nam; 1898 if (saddr->sin_family == AF_INET && 1899 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1900 vput(*vpp); 1901 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1902 } 1903 } 1904#endif 1905 /* 1906 * Check/setup credentials. 1907 */ 1908 if (exflags & MNT_EXKERB) { 1909 if (!kerbflag) { 1910 vput(*vpp); 1911 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1912 } 1913 } else if (kerbflag) { 1914 vput(*vpp); 1915 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1916 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1917 cred->cr_uid = credanon->cr_uid; 1918 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1919 cred->cr_groups[i] = credanon->cr_groups[i]; 1920 cred->cr_ngroups = i; 1921 } 1922 if (exflags & MNT_EXRDONLY) 1923 *rdonlyp = 1; 1924 else 1925 *rdonlyp = 0; 1926 1927 nfsrv_object_create(*vpp); 1928 1929 if (!lockflag) 1930 VOP_UNLOCK(*vpp, 0, p); 1931 return (0); 1932} 1933 1934 1935/* 1936 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1937 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1938 * transformed this to all zeroes in both cases, so check for it. 1939 */ 1940int 1941nfs_ispublicfh(fhp) 1942 fhandle_t *fhp; 1943{ 1944 char *cp = (char *)fhp; 1945 int i; 1946 1947 for (i = 0; i < NFSX_V3FH; i++) 1948 if (*cp++ != 0) 1949 return (FALSE); 1950 return (TRUE); 1951} 1952 1953#endif /* NFS_NOSERVER */ 1954/* 1955 * This function compares two net addresses by family and returns TRUE 1956 * if they are the same host. 1957 * If there is any doubt, return FALSE. 1958 * The AF_INET family is handled as a special case so that address mbufs 1959 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1960 */ 1961int 1962netaddr_match(family, haddr, nam) 1963 int family; 1964 union nethostaddr *haddr; 1965 struct sockaddr *nam; 1966{ 1967 register struct sockaddr_in *inetaddr; 1968 1969 switch (family) { 1970 case AF_INET: 1971 inetaddr = (struct sockaddr_in *)nam; 1972 if (inetaddr->sin_family == AF_INET && 1973 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1974 return (1); 1975 break; 1976#ifdef ISO 1977 case AF_ISO: 1978 { 1979 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1980 1981 isoaddr1 = (struct sockaddr_iso *)nam; 1982 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1983 if (isoaddr1->siso_family == AF_ISO && 1984 isoaddr1->siso_nlen > 0 && 1985 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1986 SAME_ISOADDR(isoaddr1, isoaddr2)) 1987 return (1); 1988 break; 1989 } 1990#endif /* ISO */ 1991 default: 1992 break; 1993 }; 1994 return (0); 1995} 1996 1997static nfsuint64 nfs_nullcookie = { 0, 0 }; 1998/* 1999 * This function finds the directory cookie that corresponds to the 2000 * logical byte offset given. 2001 */ 2002nfsuint64 * 2003nfs_getcookie(np, off, add) 2004 register struct nfsnode *np; 2005 off_t off; 2006 int add; 2007{ 2008 register struct nfsdmap *dp, *dp2; 2009 register int pos; 2010 2011 pos = off / NFS_DIRBLKSIZ; 2012 if (pos == 0) { 2013#ifdef DIAGNOSTIC 2014 if (add) 2015 panic("nfs getcookie add at 0"); 2016#endif 2017 return (&nfs_nullcookie); 2018 } 2019 pos--; 2020 dp = np->n_cookies.lh_first; 2021 if (!dp) { 2022 if (add) { 2023 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2024 M_NFSDIROFF, M_WAITOK); 2025 dp->ndm_eocookie = 0; 2026 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2027 } else 2028 return ((nfsuint64 *)0); 2029 } 2030 while (pos >= NFSNUMCOOKIES) { 2031 pos -= NFSNUMCOOKIES; 2032 if (dp->ndm_list.le_next) { 2033 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2034 pos >= dp->ndm_eocookie) 2035 return ((nfsuint64 *)0); 2036 dp = dp->ndm_list.le_next; 2037 } else if (add) { 2038 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2039 M_NFSDIROFF, M_WAITOK); 2040 dp2->ndm_eocookie = 0; 2041 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2042 dp = dp2; 2043 } else 2044 return ((nfsuint64 *)0); 2045 } 2046 if (pos >= dp->ndm_eocookie) { 2047 if (add) 2048 dp->ndm_eocookie = pos + 1; 2049 else 2050 return ((nfsuint64 *)0); 2051 } 2052 return (&dp->ndm_cookies[pos]); 2053} 2054 2055/* 2056 * Invalidate cached directory information, except for the actual directory 2057 * blocks (which are invalidated separately). 2058 * Done mainly to avoid the use of stale offset cookies. 2059 */ 2060void 2061nfs_invaldir(vp) 2062 register struct vnode *vp; 2063{ 2064 register struct nfsnode *np = VTONFS(vp); 2065 2066#ifdef DIAGNOSTIC 2067 if (vp->v_type != VDIR) 2068 panic("nfs: invaldir not dir"); 2069#endif 2070 np->n_direofoffset = 0; 2071 np->n_cookieverf.nfsuquad[0] = 0; 2072 np->n_cookieverf.nfsuquad[1] = 0; 2073 if (np->n_cookies.lh_first) 2074 np->n_cookies.lh_first->ndm_eocookie = 0; 2075} 2076 2077/* 2078 * The write verifier has changed (probably due to a server reboot), so all 2079 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2080 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2081 * flag. Once done the new write verifier can be set for the mount point. 2082 */ 2083void 2084nfs_clearcommit(mp) 2085 struct mount *mp; 2086{ 2087 register struct vnode *vp, *nvp; 2088 register struct buf *bp, *nbp; 2089 int s; 2090 2091 s = splbio(); 2092loop: 2093 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2094 if (vp->v_mount != mp) /* Paranoia */ 2095 goto loop; 2096 nvp = vp->v_mntvnodes.le_next; 2097 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2098 nbp = bp->b_vnbufs.le_next; 2099 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2100 == (B_DELWRI | B_NEEDCOMMIT)) 2101 bp->b_flags &= ~B_NEEDCOMMIT; 2102 } 2103 } 2104 splx(s); 2105} 2106 2107#ifndef NFS_NOSERVER 2108/* 2109 * Map errnos to NFS error numbers. For Version 3 also filter out error 2110 * numbers not specified for the associated procedure. 2111 */ 2112int 2113nfsrv_errmap(nd, err) 2114 struct nfsrv_descript *nd; 2115 register int err; 2116{ 2117 register short *defaulterrp, *errp; 2118 2119 if (nd->nd_flag & ND_NFSV3) { 2120 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2121 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2122 while (*++errp) { 2123 if (*errp == err) 2124 return (err); 2125 else if (*errp > err) 2126 break; 2127 } 2128 return ((int)*defaulterrp); 2129 } else 2130 return (err & 0xffff); 2131 } 2132 if (err <= ELAST) 2133 return ((int)nfsrv_v2errmap[err - 1]); 2134 return (NFSERR_IO); 2135} 2136 2137int 2138nfsrv_object_create(vp) 2139 struct vnode *vp; 2140{ 2141 2142 if (vp == NULL || vp->v_type != VREG) 2143 return (1); 2144 return (vfs_object_create(vp, curproc, 2145 curproc ? curproc->p_ucred : NULL, 1)); 2146} 2147 2148/* 2149 * Sort the group list in increasing numerical order. 2150 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2151 * that used to be here.) 2152 */ 2153void 2154nfsrvw_sort(list, num) 2155 register gid_t *list; 2156 register int num; 2157{ 2158 register int i, j; 2159 gid_t v; 2160 2161 /* Insertion sort. */ 2162 for (i = 1; i < num; i++) { 2163 v = list[i]; 2164 /* find correct slot for value v, moving others up */ 2165 for (j = i; --j >= 0 && v < list[j];) 2166 list[j + 1] = list[j]; 2167 list[j + 1] = v; 2168 } 2169} 2170 2171/* 2172 * copy credentials making sure that the result can be compared with bcmp(). 2173 */ 2174void 2175nfsrv_setcred(incred, outcred) 2176 register struct ucred *incred, *outcred; 2177{ 2178 register int i; 2179 2180 bzero((caddr_t)outcred, sizeof (struct ucred)); 2181 outcred->cr_ref = 1; 2182 outcred->cr_uid = incred->cr_uid; 2183 outcred->cr_ngroups = incred->cr_ngroups; 2184 for (i = 0; i < incred->cr_ngroups; i++) 2185 outcred->cr_groups[i] = incred->cr_groups[i]; 2186 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2187} 2188#endif /* NFS_NOSERVER */ 2189