nfs_srvsubs.c revision 36979
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 1.61 1998/05/31 20:08:55 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_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_int32_t *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_int32_t *, 2*NFSX_UNSIGNED); 604 *tl++ = txdr_unsigned(nqflag); 605 *tl = txdr_unsigned(nmp->nm_leaseterm); 606 } else { 607 nfsm_build(tl, u_int32_t *, 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_int32_t *xidp; 638{ 639 register struct mbuf *mb; 640 register u_int32_t *tl; 641 register caddr_t bpos; 642 register int i; 643 struct mbuf *mreq, *mb2; 644 int siz, grpsiz, authsiz; 645 static u_int32_t 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_int32_t *, 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_int32_t *, 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_int32_t *, 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_int32_t *tl; 1042 int putsize; 1043 1044 putsize = 1; 1045 m2 = *mb; 1046 left = M_TRAILINGSPACE(m2); 1047 if (left > 0) { 1048 tl = ((u_int32_t *)(*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_int32_t *); 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 int32_t 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(int32_t, 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(int32_t, 1317 fp->fa3_fileid.nfsuquad[1]); 1318 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1319 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1320 vap->va_flags = 0; 1321 vap->va_filerev = 0; 1322 } else { 1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1326 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1327 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1328 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1329 * NFS_FABLKSIZE; 1330 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1331 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1332 vap->va_flags = 0; 1333 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1334 fp->fa2_ctime.nfsv2_sec); 1335 vap->va_ctime.tv_nsec = 0; 1336 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1337 vap->va_filerev = 0; 1338 } 1339 if (vap->va_size != np->n_size) { 1340 if (vap->va_type == VREG) { 1341 if (np->n_flag & NMODIFIED) { 1342 if (vap->va_size < np->n_size) 1343 vap->va_size = np->n_size; 1344 else 1345 np->n_size = vap->va_size; 1346 } else 1347 np->n_size = vap->va_size; 1348 vnode_pager_setsize(vp, (u_long)np->n_size); 1349 } else 1350 np->n_size = vap->va_size; 1351 } 1352 np->n_attrstamp = time_second; 1353 if (vaper != NULL) { 1354 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1355 if (np->n_flag & NCHG) { 1356 if (np->n_flag & NACC) 1357 vaper->va_atime = np->n_atim; 1358 if (np->n_flag & NUPD) 1359 vaper->va_mtime = np->n_mtim; 1360 } 1361 } 1362 return (0); 1363} 1364 1365#ifdef NFS_ACDEBUG 1366#include <sys/sysctl.h> 1367static int nfs_acdebug; 1368SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1369#endif 1370 1371/* 1372 * Check the time stamp 1373 * If the cache is valid, copy contents to *vap and return 0 1374 * otherwise return an error 1375 */ 1376int 1377nfs_getattrcache(vp, vaper) 1378 register struct vnode *vp; 1379 struct vattr *vaper; 1380{ 1381 register struct nfsnode *np; 1382 register struct vattr *vap; 1383 struct nfsmount *nmp; 1384 int timeo; 1385 1386 np = VTONFS(vp); 1387 vap = &np->n_vattr; 1388 nmp = VFSTONFS(vp->v_mount); 1389 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1390 timeo = (time_second - np->n_mtime) / 10; 1391 1392#ifdef NFS_ACDEBUG 1393 if (nfs_acdebug>1) 1394 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1395#endif 1396 1397 if (vap->va_type == VDIR) { 1398 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1399 timeo = nmp->nm_acdirmin; 1400 else if (timeo > nmp->nm_acdirmax) 1401 timeo = nmp->nm_acdirmax; 1402 } else { 1403 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1404 timeo = nmp->nm_acregmin; 1405 else if (timeo > nmp->nm_acregmax) 1406 timeo = nmp->nm_acregmax; 1407 } 1408 1409#ifdef NFS_ACDEBUG 1410 if (nfs_acdebug > 2) 1411 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1412 nmp->nm_acregmin, nmp->nm_acregmax, 1413 nmp->nm_acdirmin, nmp->nm_acdirmax); 1414 1415 if (nfs_acdebug) 1416 printf("nfs_getattrcache: age = %d; final timeo = %d\n",r 1417 (time_second - np->n_attrstamp), timeo); 1418#endif 1419 1420 if ((time_second - np->n_attrstamp) >= timeo) { 1421 nfsstats.attrcache_misses++; 1422 return (ENOENT); 1423 } 1424 nfsstats.attrcache_hits++; 1425 if (vap->va_size != np->n_size) { 1426 if (vap->va_type == VREG) { 1427 if (np->n_flag & NMODIFIED) { 1428 if (vap->va_size < np->n_size) 1429 vap->va_size = np->n_size; 1430 else 1431 np->n_size = vap->va_size; 1432 } else 1433 np->n_size = vap->va_size; 1434 vnode_pager_setsize(vp, (u_long)np->n_size); 1435 } else 1436 np->n_size = vap->va_size; 1437 } 1438 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1439 if (np->n_flag & NCHG) { 1440 if (np->n_flag & NACC) 1441 vaper->va_atime = np->n_atim; 1442 if (np->n_flag & NUPD) 1443 vaper->va_mtime = np->n_mtim; 1444 } 1445 return (0); 1446} 1447 1448#ifndef NFS_NOSERVER 1449/* 1450 * Set up nameidata for a lookup() call and do it. 1451 * 1452 * If pubflag is set, this call is done for a lookup operation on the 1453 * public filehandle. In that case we allow crossing mountpoints and 1454 * absolute pathnames. However, the caller is expected to check that 1455 * the lookup result is within the public fs, and deny access if 1456 * it is not. 1457 */ 1458int 1459nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1460 register struct nameidata *ndp; 1461 fhandle_t *fhp; 1462 int len; 1463 struct nfssvc_sock *slp; 1464 struct sockaddr *nam; 1465 struct mbuf **mdp; 1466 caddr_t *dposp; 1467 struct vnode **retdirp; 1468 struct proc *p; 1469 int kerbflag, pubflag; 1470{ 1471 register int i, rem; 1472 register struct mbuf *md; 1473 register char *fromcp, *tocp, *cp; 1474 struct iovec aiov; 1475 struct uio auio; 1476 struct vnode *dp; 1477 int error, rdonly, linklen; 1478 struct componentname *cnp = &ndp->ni_cnd; 1479 1480 *retdirp = (struct vnode *)0; 1481 cnp->cn_pnbuf = zalloc(namei_zone); 1482 1483 /* 1484 * Copy the name from the mbuf list to ndp->ni_pnbuf 1485 * and set the various ndp fields appropriately. 1486 */ 1487 fromcp = *dposp; 1488 tocp = cnp->cn_pnbuf; 1489 md = *mdp; 1490 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1491 cnp->cn_hash = 0; 1492 for (i = 0; i < len; i++) { 1493 while (rem == 0) { 1494 md = md->m_next; 1495 if (md == NULL) { 1496 error = EBADRPC; 1497 goto out; 1498 } 1499 fromcp = mtod(md, caddr_t); 1500 rem = md->m_len; 1501 } 1502 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1503 error = EACCES; 1504 goto out; 1505 } 1506 cnp->cn_hash += (unsigned char)*fromcp; 1507 *tocp++ = *fromcp++; 1508 rem--; 1509 } 1510 *tocp = '\0'; 1511 *mdp = md; 1512 *dposp = fromcp; 1513 len = nfsm_rndup(len)-len; 1514 if (len > 0) { 1515 if (rem >= len) 1516 *dposp += len; 1517 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1518 goto out; 1519 } 1520 1521 /* 1522 * Extract and set starting directory. 1523 */ 1524 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1525 nam, &rdonly, kerbflag, pubflag); 1526 if (error) 1527 goto out; 1528 if (dp->v_type != VDIR) { 1529 vrele(dp); 1530 error = ENOTDIR; 1531 goto out; 1532 } 1533 1534 if (rdonly) 1535 cnp->cn_flags |= RDONLY; 1536 1537 *retdirp = dp; 1538 1539 if (pubflag) { 1540 /* 1541 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1542 * and the 'native path' indicator. 1543 */ 1544 cp = zalloc(namei_zone); 1545 fromcp = cnp->cn_pnbuf; 1546 tocp = cp; 1547 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1548 switch ((unsigned char)*fromcp) { 1549 case WEBNFS_NATIVE_CHAR: 1550 /* 1551 * 'Native' path for us is the same 1552 * as a path according to the NFS spec, 1553 * just skip the escape char. 1554 */ 1555 fromcp++; 1556 break; 1557 /* 1558 * More may be added in the future, range 0x80-0xff 1559 */ 1560 default: 1561 error = EIO; 1562 zfree(namei_zone, cp); 1563 goto out; 1564 } 1565 } 1566 /* 1567 * Translate the '%' escapes, URL-style. 1568 */ 1569 while (*fromcp != '\0') { 1570 if (*fromcp == WEBNFS_ESC_CHAR) { 1571 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1572 fromcp++; 1573 *tocp++ = HEXSTRTOI(fromcp); 1574 fromcp += 2; 1575 continue; 1576 } else { 1577 error = ENOENT; 1578 zfree(namei_zone, cp); 1579 goto out; 1580 } 1581 } else 1582 *tocp++ = *fromcp++; 1583 } 1584 *tocp = '\0'; 1585 zfree(namei_zone, cnp->cn_pnbuf); 1586 cnp->cn_pnbuf = cp; 1587 } 1588 1589 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1590 ndp->ni_segflg = UIO_SYSSPACE; 1591 1592 if (pubflag) { 1593 ndp->ni_rootdir = rootvnode; 1594 ndp->ni_loopcnt = 0; 1595 if (cnp->cn_pnbuf[0] == '/') 1596 dp = rootvnode; 1597 } else { 1598 cnp->cn_flags |= NOCROSSMOUNT; 1599 } 1600 1601 cnp->cn_proc = p; 1602 VREF(dp); 1603 1604 for (;;) { 1605 cnp->cn_nameptr = cnp->cn_pnbuf; 1606 ndp->ni_startdir = dp; 1607 /* 1608 * And call lookup() to do the real work 1609 */ 1610 error = lookup(ndp); 1611 if (error) 1612 break; 1613 /* 1614 * Check for encountering a symbolic link 1615 */ 1616 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1617 nfsrv_object_create(ndp->ni_vp); 1618 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1619 cnp->cn_flags |= HASBUF; 1620 return (0); 1621 } 1622 break; 1623 } else { 1624 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1625 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1626 if (!pubflag) { 1627 vrele(ndp->ni_dvp); 1628 vput(ndp->ni_vp); 1629 ndp->ni_vp = NULL; 1630 error = EINVAL; 1631 break; 1632 } 1633 1634 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1635 error = ELOOP; 1636 break; 1637 } 1638 if (ndp->ni_pathlen > 1) 1639 cp = zalloc(namei_zone); 1640 else 1641 cp = cnp->cn_pnbuf; 1642 aiov.iov_base = cp; 1643 aiov.iov_len = MAXPATHLEN; 1644 auio.uio_iov = &aiov; 1645 auio.uio_iovcnt = 1; 1646 auio.uio_offset = 0; 1647 auio.uio_rw = UIO_READ; 1648 auio.uio_segflg = UIO_SYSSPACE; 1649 auio.uio_procp = (struct proc *)0; 1650 auio.uio_resid = MAXPATHLEN; 1651 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1652 if (error) { 1653 badlink: 1654 if (ndp->ni_pathlen > 1) 1655 zfree(namei_zone, cp); 1656 break; 1657 } 1658 linklen = MAXPATHLEN - auio.uio_resid; 1659 if (linklen == 0) { 1660 error = ENOENT; 1661 goto badlink; 1662 } 1663 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1664 error = ENAMETOOLONG; 1665 goto badlink; 1666 } 1667 if (ndp->ni_pathlen > 1) { 1668 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1669 zfree(namei_zone, cnp->cn_pnbuf); 1670 cnp->cn_pnbuf = cp; 1671 } else 1672 cnp->cn_pnbuf[linklen] = '\0'; 1673 ndp->ni_pathlen += linklen; 1674 vput(ndp->ni_vp); 1675 dp = ndp->ni_dvp; 1676 /* 1677 * Check if root directory should replace current directory. 1678 */ 1679 if (cnp->cn_pnbuf[0] == '/') { 1680 vrele(dp); 1681 dp = ndp->ni_rootdir; 1682 VREF(dp); 1683 } 1684 } 1685 } 1686out: 1687 zfree(namei_zone, cnp->cn_pnbuf); 1688 return (error); 1689} 1690 1691/* 1692 * A fiddled version of m_adj() that ensures null fill to a long 1693 * boundary and only trims off the back end 1694 */ 1695void 1696nfsm_adj(mp, len, nul) 1697 struct mbuf *mp; 1698 register int len; 1699 int nul; 1700{ 1701 register struct mbuf *m; 1702 register int count, i; 1703 register char *cp; 1704 1705 /* 1706 * Trim from tail. Scan the mbuf chain, 1707 * calculating its length and finding the last mbuf. 1708 * If the adjustment only affects this mbuf, then just 1709 * adjust and return. Otherwise, rescan and truncate 1710 * after the remaining size. 1711 */ 1712 count = 0; 1713 m = mp; 1714 for (;;) { 1715 count += m->m_len; 1716 if (m->m_next == (struct mbuf *)0) 1717 break; 1718 m = m->m_next; 1719 } 1720 if (m->m_len > len) { 1721 m->m_len -= len; 1722 if (nul > 0) { 1723 cp = mtod(m, caddr_t)+m->m_len-nul; 1724 for (i = 0; i < nul; i++) 1725 *cp++ = '\0'; 1726 } 1727 return; 1728 } 1729 count -= len; 1730 if (count < 0) 1731 count = 0; 1732 /* 1733 * Correct length for chain is "count". 1734 * Find the mbuf with last data, adjust its length, 1735 * and toss data from remaining mbufs on chain. 1736 */ 1737 for (m = mp; m; m = m->m_next) { 1738 if (m->m_len >= count) { 1739 m->m_len = count; 1740 if (nul > 0) { 1741 cp = mtod(m, caddr_t)+m->m_len-nul; 1742 for (i = 0; i < nul; i++) 1743 *cp++ = '\0'; 1744 } 1745 break; 1746 } 1747 count -= m->m_len; 1748 } 1749 for (m = m->m_next;m;m = m->m_next) 1750 m->m_len = 0; 1751} 1752 1753/* 1754 * Make these functions instead of macros, so that the kernel text size 1755 * doesn't get too big... 1756 */ 1757void 1758nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1759 struct nfsrv_descript *nfsd; 1760 int before_ret; 1761 register struct vattr *before_vap; 1762 int after_ret; 1763 struct vattr *after_vap; 1764 struct mbuf **mbp; 1765 char **bposp; 1766{ 1767 register struct mbuf *mb = *mbp, *mb2; 1768 register char *bpos = *bposp; 1769 register u_int32_t *tl; 1770 1771 if (before_ret) { 1772 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1773 *tl = nfs_false; 1774 } else { 1775 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1776 *tl++ = nfs_true; 1777 txdr_hyper(&(before_vap->va_size), tl); 1778 tl += 2; 1779 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1780 tl += 2; 1781 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1782 } 1783 *bposp = bpos; 1784 *mbp = mb; 1785 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1786} 1787 1788void 1789nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1790 struct nfsrv_descript *nfsd; 1791 int after_ret; 1792 struct vattr *after_vap; 1793 struct mbuf **mbp; 1794 char **bposp; 1795{ 1796 register struct mbuf *mb = *mbp, *mb2; 1797 register char *bpos = *bposp; 1798 register u_int32_t *tl; 1799 register struct nfs_fattr *fp; 1800 1801 if (after_ret) { 1802 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1803 *tl = nfs_false; 1804 } else { 1805 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1806 *tl++ = nfs_true; 1807 fp = (struct nfs_fattr *)tl; 1808 nfsm_srvfattr(nfsd, after_vap, fp); 1809 } 1810 *mbp = mb; 1811 *bposp = bpos; 1812} 1813 1814void 1815nfsm_srvfattr(nfsd, vap, fp) 1816 register struct nfsrv_descript *nfsd; 1817 register struct vattr *vap; 1818 register struct nfs_fattr *fp; 1819{ 1820 1821 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1822 fp->fa_uid = txdr_unsigned(vap->va_uid); 1823 fp->fa_gid = txdr_unsigned(vap->va_gid); 1824 if (nfsd->nd_flag & ND_NFSV3) { 1825 fp->fa_type = vtonfsv3_type(vap->va_type); 1826 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1827 txdr_hyper(&vap->va_size, &fp->fa3_size); 1828 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1829 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1830 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1831 fp->fa3_fsid.nfsuquad[0] = 0; 1832 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1833 fp->fa3_fileid.nfsuquad[0] = 0; 1834 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1835 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1836 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1837 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1838 } else { 1839 fp->fa_type = vtonfsv2_type(vap->va_type); 1840 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1841 fp->fa2_size = txdr_unsigned(vap->va_size); 1842 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1843 if (vap->va_type == VFIFO) 1844 fp->fa2_rdev = 0xffffffff; 1845 else 1846 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1847 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1848 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1849 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1850 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1851 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1852 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1853 } 1854} 1855 1856/* 1857 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1858 * - look up fsid in mount list (if not found ret error) 1859 * - get vp and export rights by calling VFS_FHTOVP() 1860 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1861 * - if not lockflag unlock it with VOP_UNLOCK() 1862 */ 1863int 1864nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1865 fhandle_t *fhp; 1866 int lockflag; 1867 struct vnode **vpp; 1868 struct ucred *cred; 1869 struct nfssvc_sock *slp; 1870 struct sockaddr *nam; 1871 int *rdonlyp; 1872 int kerbflag; 1873 int pubflag; 1874{ 1875 struct proc *p = curproc; /* XXX */ 1876 register struct mount *mp; 1877 register int i; 1878 struct ucred *credanon; 1879 int error, exflags; 1880#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1881 struct sockaddr_int *saddr; 1882#endif 1883 1884 *vpp = (struct vnode *)0; 1885 1886 if (nfs_ispublicfh(fhp)) { 1887 if (!pubflag || !nfs_pub.np_valid) 1888 return (ESTALE); 1889 fhp = &nfs_pub.np_handle; 1890 } 1891 1892 mp = vfs_getvfs(&fhp->fh_fsid); 1893 if (!mp) 1894 return (ESTALE); 1895 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1896 if (error) 1897 return (error); 1898#ifdef MNT_EXNORESPORT 1899 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1900 saddr = (struct sockaddr_in *)nam; 1901 if (saddr->sin_family == AF_INET && 1902 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1903 vput(*vpp); 1904 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1905 } 1906 } 1907#endif 1908 /* 1909 * Check/setup credentials. 1910 */ 1911 if (exflags & MNT_EXKERB) { 1912 if (!kerbflag) { 1913 vput(*vpp); 1914 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1915 } 1916 } else if (kerbflag) { 1917 vput(*vpp); 1918 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1919 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1920 cred->cr_uid = credanon->cr_uid; 1921 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1922 cred->cr_groups[i] = credanon->cr_groups[i]; 1923 cred->cr_ngroups = i; 1924 } 1925 if (exflags & MNT_EXRDONLY) 1926 *rdonlyp = 1; 1927 else 1928 *rdonlyp = 0; 1929 1930 nfsrv_object_create(*vpp); 1931 1932 if (!lockflag) 1933 VOP_UNLOCK(*vpp, 0, p); 1934 return (0); 1935} 1936 1937 1938/* 1939 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1940 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1941 * transformed this to all zeroes in both cases, so check for it. 1942 */ 1943int 1944nfs_ispublicfh(fhp) 1945 fhandle_t *fhp; 1946{ 1947 char *cp = (char *)fhp; 1948 int i; 1949 1950 for (i = 0; i < NFSX_V3FH; i++) 1951 if (*cp++ != 0) 1952 return (FALSE); 1953 return (TRUE); 1954} 1955 1956#endif /* NFS_NOSERVER */ 1957/* 1958 * This function compares two net addresses by family and returns TRUE 1959 * if they are the same host. 1960 * If there is any doubt, return FALSE. 1961 * The AF_INET family is handled as a special case so that address mbufs 1962 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1963 */ 1964int 1965netaddr_match(family, haddr, nam) 1966 int family; 1967 union nethostaddr *haddr; 1968 struct sockaddr *nam; 1969{ 1970 register struct sockaddr_in *inetaddr; 1971 1972 switch (family) { 1973 case AF_INET: 1974 inetaddr = (struct sockaddr_in *)nam; 1975 if (inetaddr->sin_family == AF_INET && 1976 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1977 return (1); 1978 break; 1979#ifdef ISO 1980 case AF_ISO: 1981 { 1982 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1983 1984 isoaddr1 = (struct sockaddr_iso *)nam; 1985 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 1986 if (isoaddr1->siso_family == AF_ISO && 1987 isoaddr1->siso_nlen > 0 && 1988 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1989 SAME_ISOADDR(isoaddr1, isoaddr2)) 1990 return (1); 1991 break; 1992 } 1993#endif /* ISO */ 1994 default: 1995 break; 1996 }; 1997 return (0); 1998} 1999 2000static nfsuint64 nfs_nullcookie = { 0, 0 }; 2001/* 2002 * This function finds the directory cookie that corresponds to the 2003 * logical byte offset given. 2004 */ 2005nfsuint64 * 2006nfs_getcookie(np, off, add) 2007 register struct nfsnode *np; 2008 off_t off; 2009 int add; 2010{ 2011 register struct nfsdmap *dp, *dp2; 2012 register int pos; 2013 2014 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2015 if (pos == 0 || off < 0) { 2016#ifdef DIAGNOSTIC 2017 if (add) 2018 panic("nfs getcookie add at <= 0"); 2019#endif 2020 return (&nfs_nullcookie); 2021 } 2022 pos--; 2023 dp = np->n_cookies.lh_first; 2024 if (!dp) { 2025 if (add) { 2026 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2027 M_NFSDIROFF, M_WAITOK); 2028 dp->ndm_eocookie = 0; 2029 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2030 } else 2031 return ((nfsuint64 *)0); 2032 } 2033 while (pos >= NFSNUMCOOKIES) { 2034 pos -= NFSNUMCOOKIES; 2035 if (dp->ndm_list.le_next) { 2036 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2037 pos >= dp->ndm_eocookie) 2038 return ((nfsuint64 *)0); 2039 dp = dp->ndm_list.le_next; 2040 } else if (add) { 2041 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2042 M_NFSDIROFF, M_WAITOK); 2043 dp2->ndm_eocookie = 0; 2044 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2045 dp = dp2; 2046 } else 2047 return ((nfsuint64 *)0); 2048 } 2049 if (pos >= dp->ndm_eocookie) { 2050 if (add) 2051 dp->ndm_eocookie = pos + 1; 2052 else 2053 return ((nfsuint64 *)0); 2054 } 2055 return (&dp->ndm_cookies[pos]); 2056} 2057 2058/* 2059 * Invalidate cached directory information, except for the actual directory 2060 * blocks (which are invalidated separately). 2061 * Done mainly to avoid the use of stale offset cookies. 2062 */ 2063void 2064nfs_invaldir(vp) 2065 register struct vnode *vp; 2066{ 2067 register struct nfsnode *np = VTONFS(vp); 2068 2069#ifdef DIAGNOSTIC 2070 if (vp->v_type != VDIR) 2071 panic("nfs: invaldir not dir"); 2072#endif 2073 np->n_direofoffset = 0; 2074 np->n_cookieverf.nfsuquad[0] = 0; 2075 np->n_cookieverf.nfsuquad[1] = 0; 2076 if (np->n_cookies.lh_first) 2077 np->n_cookies.lh_first->ndm_eocookie = 0; 2078} 2079 2080/* 2081 * The write verifier has changed (probably due to a server reboot), so all 2082 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2083 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2084 * flag. Once done the new write verifier can be set for the mount point. 2085 */ 2086void 2087nfs_clearcommit(mp) 2088 struct mount *mp; 2089{ 2090 register struct vnode *vp, *nvp; 2091 register struct buf *bp, *nbp; 2092 int s; 2093 2094 s = splbio(); 2095loop: 2096 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2097 if (vp->v_mount != mp) /* Paranoia */ 2098 goto loop; 2099 nvp = vp->v_mntvnodes.le_next; 2100 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2101 nbp = bp->b_vnbufs.le_next; 2102 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2103 == (B_DELWRI | B_NEEDCOMMIT)) 2104 bp->b_flags &= ~B_NEEDCOMMIT; 2105 } 2106 } 2107 splx(s); 2108} 2109 2110#ifndef NFS_NOSERVER 2111/* 2112 * Map errnos to NFS error numbers. For Version 3 also filter out error 2113 * numbers not specified for the associated procedure. 2114 */ 2115int 2116nfsrv_errmap(nd, err) 2117 struct nfsrv_descript *nd; 2118 register int err; 2119{ 2120 register short *defaulterrp, *errp; 2121 2122 if (nd->nd_flag & ND_NFSV3) { 2123 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2124 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2125 while (*++errp) { 2126 if (*errp == err) 2127 return (err); 2128 else if (*errp > err) 2129 break; 2130 } 2131 return ((int)*defaulterrp); 2132 } else 2133 return (err & 0xffff); 2134 } 2135 if (err <= ELAST) 2136 return ((int)nfsrv_v2errmap[err - 1]); 2137 return (NFSERR_IO); 2138} 2139 2140int 2141nfsrv_object_create(vp) 2142 struct vnode *vp; 2143{ 2144 2145 if (vp == NULL || vp->v_type != VREG) 2146 return (1); 2147 return (vfs_object_create(vp, curproc, 2148 curproc ? curproc->p_ucred : NULL, 1)); 2149} 2150 2151/* 2152 * Sort the group list in increasing numerical order. 2153 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2154 * that used to be here.) 2155 */ 2156void 2157nfsrvw_sort(list, num) 2158 register gid_t *list; 2159 register int num; 2160{ 2161 register int i, j; 2162 gid_t v; 2163 2164 /* Insertion sort. */ 2165 for (i = 1; i < num; i++) { 2166 v = list[i]; 2167 /* find correct slot for value v, moving others up */ 2168 for (j = i; --j >= 0 && v < list[j];) 2169 list[j + 1] = list[j]; 2170 list[j + 1] = v; 2171 } 2172} 2173 2174/* 2175 * copy credentials making sure that the result can be compared with bcmp(). 2176 */ 2177void 2178nfsrv_setcred(incred, outcred) 2179 register struct ucred *incred, *outcred; 2180{ 2181 register int i; 2182 2183 bzero((caddr_t)outcred, sizeof (struct ucred)); 2184 outcred->cr_ref = 1; 2185 outcred->cr_uid = incred->cr_uid; 2186 outcred->cr_ngroups = incred->cr_ngroups; 2187 for (i = 0; i < incred->cr_ngroups; i++) 2188 outcred->cr_groups[i] = incred->cr_groups[i]; 2189 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2190} 2191#endif /* NFS_NOSERVER */ 2192