nfs_srvsubs.c revision 42957
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 1.70 1999/01/05 18:49:58 eivind Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/buf.h> 47#include <sys/proc.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/mount.h> 51#include <sys/vnode.h> 52#include <sys/namei.h> 53#include <sys/mbuf.h> 54#include <sys/socket.h> 55#include <sys/stat.h> 56#include <sys/malloc.h> 57#include <sys/sysent.h> 58#include <sys/syscall.h> 59 60#include <vm/vm.h> 61#include <vm/vm_object.h> 62#include <vm/vm_extern.h> 63#include <vm/vm_zone.h> 64 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <nfs/nfsnode.h> 69#include <nfs/xdr_subs.h> 70#include <nfs/nfsm_subs.h> 71#include <nfs/nfsmount.h> 72#include <nfs/nqnfs.h> 73#include <nfs/nfsrtt.h> 74 75#include <miscfs/specfs/specdev.h> 76 77#include <netinet/in.h> 78#ifdef ISO 79#include <netiso/iso.h> 80#endif 81 82/* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86u_int32_t nfs_xdrneg1; 87u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92/* And other global data */ 93static u_int32_t nfs_xid = 0; 94static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96}; 97enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99}; 100 101int nfs_ticks; 102int nfs_pbuf_freecnt = -1; /* start out unlimited */ 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 114static void (*nfs_prev_lease_updatetime) __P((int)); 115static int nfs_prev_nfssvc_sy_narg; 116static sy_call_t *nfs_prev_nfssvc_sy_call; 117 118#ifndef NFS_NOSERVER 119 120static vop_t *nfs_prev_vop_lease_check; 121static int nfs_prev_getfh_sy_narg; 122static sy_call_t *nfs_prev_getfh_sy_call; 123 124/* 125 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 126 */ 127int nfsv3_procid[NFS_NPROCS] = { 128 NFSPROC_NULL, 129 NFSPROC_GETATTR, 130 NFSPROC_SETATTR, 131 NFSPROC_NOOP, 132 NFSPROC_LOOKUP, 133 NFSPROC_READLINK, 134 NFSPROC_READ, 135 NFSPROC_NOOP, 136 NFSPROC_WRITE, 137 NFSPROC_CREATE, 138 NFSPROC_REMOVE, 139 NFSPROC_RENAME, 140 NFSPROC_LINK, 141 NFSPROC_SYMLINK, 142 NFSPROC_MKDIR, 143 NFSPROC_RMDIR, 144 NFSPROC_READDIR, 145 NFSPROC_FSSTAT, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP, 152 NFSPROC_NOOP, 153 NFSPROC_NOOP 154}; 155 156#endif /* NFS_NOSERVER */ 157/* 158 * and the reverse mapping from generic to Version 2 procedure numbers 159 */ 160int nfsv2_procid[NFS_NPROCS] = { 161 NFSV2PROC_NULL, 162 NFSV2PROC_GETATTR, 163 NFSV2PROC_SETATTR, 164 NFSV2PROC_LOOKUP, 165 NFSV2PROC_NOOP, 166 NFSV2PROC_READLINK, 167 NFSV2PROC_READ, 168 NFSV2PROC_WRITE, 169 NFSV2PROC_CREATE, 170 NFSV2PROC_MKDIR, 171 NFSV2PROC_SYMLINK, 172 NFSV2PROC_CREATE, 173 NFSV2PROC_REMOVE, 174 NFSV2PROC_RMDIR, 175 NFSV2PROC_RENAME, 176 NFSV2PROC_LINK, 177 NFSV2PROC_READDIR, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_STATFS, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 NFSV2PROC_NOOP, 186 NFSV2PROC_NOOP, 187}; 188 189#ifndef NFS_NOSERVER 190/* 191 * Maps errno values to nfs error numbers. 192 * Use NFSERR_IO as the catch all for ones not specifically defined in 193 * RFC 1094. 194 */ 195static u_char nfsrv_v2errmap[ELAST] = { 196 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 200 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 209 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 210 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 212 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 213 NFSERR_IO /* << Last is 86 */ 214}; 215 216/* 217 * Maps errno values to nfs error numbers. 218 * Although it is not obvious whether or not NFS clients really care if 219 * a returned error value is in the specified list for the procedure, the 220 * safest thing to do is filter them appropriately. For Version 2, the 221 * X/Open XNFS document is the only specification that defines error values 222 * for each RPC (The RFC simply lists all possible error values for all RPCs), 223 * so I have decided to not do this for Version 2. 224 * The first entry is the default error return and the rest are the valid 225 * errors for that RPC in increasing numeric order. 226 */ 227static short nfsv3err_null[] = { 228 0, 229 0, 230}; 231 232static short nfsv3err_getattr[] = { 233 NFSERR_IO, 234 NFSERR_IO, 235 NFSERR_STALE, 236 NFSERR_BADHANDLE, 237 NFSERR_SERVERFAULT, 238 0, 239}; 240 241static short nfsv3err_setattr[] = { 242 NFSERR_IO, 243 NFSERR_PERM, 244 NFSERR_IO, 245 NFSERR_ACCES, 246 NFSERR_INVAL, 247 NFSERR_NOSPC, 248 NFSERR_ROFS, 249 NFSERR_DQUOT, 250 NFSERR_STALE, 251 NFSERR_BADHANDLE, 252 NFSERR_NOT_SYNC, 253 NFSERR_SERVERFAULT, 254 0, 255}; 256 257static short nfsv3err_lookup[] = { 258 NFSERR_IO, 259 NFSERR_NOENT, 260 NFSERR_IO, 261 NFSERR_ACCES, 262 NFSERR_NOTDIR, 263 NFSERR_NAMETOL, 264 NFSERR_STALE, 265 NFSERR_BADHANDLE, 266 NFSERR_SERVERFAULT, 267 0, 268}; 269 270static short nfsv3err_access[] = { 271 NFSERR_IO, 272 NFSERR_IO, 273 NFSERR_STALE, 274 NFSERR_BADHANDLE, 275 NFSERR_SERVERFAULT, 276 0, 277}; 278 279static short nfsv3err_readlink[] = { 280 NFSERR_IO, 281 NFSERR_IO, 282 NFSERR_ACCES, 283 NFSERR_INVAL, 284 NFSERR_STALE, 285 NFSERR_BADHANDLE, 286 NFSERR_NOTSUPP, 287 NFSERR_SERVERFAULT, 288 0, 289}; 290 291static short nfsv3err_read[] = { 292 NFSERR_IO, 293 NFSERR_IO, 294 NFSERR_NXIO, 295 NFSERR_ACCES, 296 NFSERR_INVAL, 297 NFSERR_STALE, 298 NFSERR_BADHANDLE, 299 NFSERR_SERVERFAULT, 300 0, 301}; 302 303static short nfsv3err_write[] = { 304 NFSERR_IO, 305 NFSERR_IO, 306 NFSERR_ACCES, 307 NFSERR_INVAL, 308 NFSERR_FBIG, 309 NFSERR_NOSPC, 310 NFSERR_ROFS, 311 NFSERR_DQUOT, 312 NFSERR_STALE, 313 NFSERR_BADHANDLE, 314 NFSERR_SERVERFAULT, 315 0, 316}; 317 318static short nfsv3err_create[] = { 319 NFSERR_IO, 320 NFSERR_IO, 321 NFSERR_ACCES, 322 NFSERR_EXIST, 323 NFSERR_NOTDIR, 324 NFSERR_NOSPC, 325 NFSERR_ROFS, 326 NFSERR_NAMETOL, 327 NFSERR_DQUOT, 328 NFSERR_STALE, 329 NFSERR_BADHANDLE, 330 NFSERR_NOTSUPP, 331 NFSERR_SERVERFAULT, 332 0, 333}; 334 335static short nfsv3err_mkdir[] = { 336 NFSERR_IO, 337 NFSERR_IO, 338 NFSERR_ACCES, 339 NFSERR_EXIST, 340 NFSERR_NOTDIR, 341 NFSERR_NOSPC, 342 NFSERR_ROFS, 343 NFSERR_NAMETOL, 344 NFSERR_DQUOT, 345 NFSERR_STALE, 346 NFSERR_BADHANDLE, 347 NFSERR_NOTSUPP, 348 NFSERR_SERVERFAULT, 349 0, 350}; 351 352static short nfsv3err_symlink[] = { 353 NFSERR_IO, 354 NFSERR_IO, 355 NFSERR_ACCES, 356 NFSERR_EXIST, 357 NFSERR_NOTDIR, 358 NFSERR_NOSPC, 359 NFSERR_ROFS, 360 NFSERR_NAMETOL, 361 NFSERR_DQUOT, 362 NFSERR_STALE, 363 NFSERR_BADHANDLE, 364 NFSERR_NOTSUPP, 365 NFSERR_SERVERFAULT, 366 0, 367}; 368 369static short nfsv3err_mknod[] = { 370 NFSERR_IO, 371 NFSERR_IO, 372 NFSERR_ACCES, 373 NFSERR_EXIST, 374 NFSERR_NOTDIR, 375 NFSERR_NOSPC, 376 NFSERR_ROFS, 377 NFSERR_NAMETOL, 378 NFSERR_DQUOT, 379 NFSERR_STALE, 380 NFSERR_BADHANDLE, 381 NFSERR_NOTSUPP, 382 NFSERR_SERVERFAULT, 383 NFSERR_BADTYPE, 384 0, 385}; 386 387static short nfsv3err_remove[] = { 388 NFSERR_IO, 389 NFSERR_NOENT, 390 NFSERR_IO, 391 NFSERR_ACCES, 392 NFSERR_NOTDIR, 393 NFSERR_ROFS, 394 NFSERR_NAMETOL, 395 NFSERR_STALE, 396 NFSERR_BADHANDLE, 397 NFSERR_SERVERFAULT, 398 0, 399}; 400 401static short nfsv3err_rmdir[] = { 402 NFSERR_IO, 403 NFSERR_NOENT, 404 NFSERR_IO, 405 NFSERR_ACCES, 406 NFSERR_EXIST, 407 NFSERR_NOTDIR, 408 NFSERR_INVAL, 409 NFSERR_ROFS, 410 NFSERR_NAMETOL, 411 NFSERR_NOTEMPTY, 412 NFSERR_STALE, 413 NFSERR_BADHANDLE, 414 NFSERR_NOTSUPP, 415 NFSERR_SERVERFAULT, 416 0, 417}; 418 419static short nfsv3err_rename[] = { 420 NFSERR_IO, 421 NFSERR_NOENT, 422 NFSERR_IO, 423 NFSERR_ACCES, 424 NFSERR_EXIST, 425 NFSERR_XDEV, 426 NFSERR_NOTDIR, 427 NFSERR_ISDIR, 428 NFSERR_INVAL, 429 NFSERR_NOSPC, 430 NFSERR_ROFS, 431 NFSERR_MLINK, 432 NFSERR_NAMETOL, 433 NFSERR_NOTEMPTY, 434 NFSERR_DQUOT, 435 NFSERR_STALE, 436 NFSERR_BADHANDLE, 437 NFSERR_NOTSUPP, 438 NFSERR_SERVERFAULT, 439 0, 440}; 441 442static short nfsv3err_link[] = { 443 NFSERR_IO, 444 NFSERR_IO, 445 NFSERR_ACCES, 446 NFSERR_EXIST, 447 NFSERR_XDEV, 448 NFSERR_NOTDIR, 449 NFSERR_INVAL, 450 NFSERR_NOSPC, 451 NFSERR_ROFS, 452 NFSERR_MLINK, 453 NFSERR_NAMETOL, 454 NFSERR_DQUOT, 455 NFSERR_STALE, 456 NFSERR_BADHANDLE, 457 NFSERR_NOTSUPP, 458 NFSERR_SERVERFAULT, 459 0, 460}; 461 462static short nfsv3err_readdir[] = { 463 NFSERR_IO, 464 NFSERR_IO, 465 NFSERR_ACCES, 466 NFSERR_NOTDIR, 467 NFSERR_STALE, 468 NFSERR_BADHANDLE, 469 NFSERR_BAD_COOKIE, 470 NFSERR_TOOSMALL, 471 NFSERR_SERVERFAULT, 472 0, 473}; 474 475static short nfsv3err_readdirplus[] = { 476 NFSERR_IO, 477 NFSERR_IO, 478 NFSERR_ACCES, 479 NFSERR_NOTDIR, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_BAD_COOKIE, 483 NFSERR_NOTSUPP, 484 NFSERR_TOOSMALL, 485 NFSERR_SERVERFAULT, 486 0, 487}; 488 489static short nfsv3err_fsstat[] = { 490 NFSERR_IO, 491 NFSERR_IO, 492 NFSERR_STALE, 493 NFSERR_BADHANDLE, 494 NFSERR_SERVERFAULT, 495 0, 496}; 497 498static short nfsv3err_fsinfo[] = { 499 NFSERR_STALE, 500 NFSERR_STALE, 501 NFSERR_BADHANDLE, 502 NFSERR_SERVERFAULT, 503 0, 504}; 505 506static short nfsv3err_pathconf[] = { 507 NFSERR_STALE, 508 NFSERR_STALE, 509 NFSERR_BADHANDLE, 510 NFSERR_SERVERFAULT, 511 0, 512}; 513 514static short nfsv3err_commit[] = { 515 NFSERR_IO, 516 NFSERR_IO, 517 NFSERR_STALE, 518 NFSERR_BADHANDLE, 519 NFSERR_SERVERFAULT, 520 0, 521}; 522 523static short *nfsrv_v3errmap[] = { 524 nfsv3err_null, 525 nfsv3err_getattr, 526 nfsv3err_setattr, 527 nfsv3err_lookup, 528 nfsv3err_access, 529 nfsv3err_readlink, 530 nfsv3err_read, 531 nfsv3err_write, 532 nfsv3err_create, 533 nfsv3err_mkdir, 534 nfsv3err_symlink, 535 nfsv3err_mknod, 536 nfsv3err_remove, 537 nfsv3err_rmdir, 538 nfsv3err_rename, 539 nfsv3err_link, 540 nfsv3err_readdir, 541 nfsv3err_readdirplus, 542 nfsv3err_fsstat, 543 nfsv3err_fsinfo, 544 nfsv3err_pathconf, 545 nfsv3err_commit, 546}; 547 548#endif /* NFS_NOSERVER */ 549 550extern struct nfsrtt nfsrtt; 551extern time_t nqnfsstarttime; 552extern int nqsrv_clockskew; 553extern int nqsrv_writeslack; 554extern int nqsrv_maxlease; 555extern struct nfsstats nfsstats; 556extern int nqnfs_piggy[NFS_NPROCS]; 557extern nfstype nfsv2_type[9]; 558extern nfstype nfsv3_type[9]; 559extern struct nfsnodehashhead *nfsnodehashtbl; 560extern u_long nfsnodehash; 561 562struct getfh_args; 563extern int getfh(struct proc *, struct getfh_args *, int *); 564struct nfssvc_args; 565extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 566 567LIST_HEAD(nfsnodehashhead, nfsnode); 568 569int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 570 571u_quad_t 572nfs_curusec() 573{ 574 struct timeval tv; 575 576 getmicrotime(&tv); 577 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 578} 579 580/* 581 * Create the header for an rpc request packet 582 * The hsiz is the size of the rest of the nfs request header. 583 * (just used to decide if a cluster is a good idea) 584 */ 585struct mbuf * 586nfsm_reqh(vp, procid, hsiz, bposp) 587 struct vnode *vp; 588 u_long procid; 589 int hsiz; 590 caddr_t *bposp; 591{ 592 register struct mbuf *mb; 593 register u_int32_t *tl; 594 register caddr_t bpos; 595 struct mbuf *mb2; 596 struct nfsmount *nmp; 597 int nqflag; 598 599 MGET(mb, M_WAIT, MT_DATA); 600 if (hsiz >= MINCLSIZE) 601 MCLGET(mb, M_WAIT); 602 mb->m_len = 0; 603 bpos = mtod(mb, caddr_t); 604 605 /* 606 * For NQNFS, add lease request. 607 */ 608 if (vp) { 609 nmp = VFSTONFS(vp->v_mount); 610 if (nmp->nm_flag & NFSMNT_NQNFS) { 611 nqflag = NQNFS_NEEDLEASE(vp, procid); 612 if (nqflag) { 613 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 614 *tl++ = txdr_unsigned(nqflag); 615 *tl = txdr_unsigned(nmp->nm_leaseterm); 616 } else { 617 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 618 *tl = 0; 619 } 620 } 621 } 622 /* Finally, return values */ 623 *bposp = bpos; 624 return (mb); 625} 626 627/* 628 * Build the RPC header and fill in the authorization info. 629 * The authorization string argument is only used when the credentials 630 * come from outside of the kernel. 631 * Returns the head of the mbuf list. 632 */ 633struct mbuf * 634nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 635 verf_str, mrest, mrest_len, mbp, xidp) 636 register struct ucred *cr; 637 int nmflag; 638 int procid; 639 int auth_type; 640 int auth_len; 641 char *auth_str; 642 int verf_len; 643 char *verf_str; 644 struct mbuf *mrest; 645 int mrest_len; 646 struct mbuf **mbp; 647 u_int32_t *xidp; 648{ 649 register struct mbuf *mb; 650 register u_int32_t *tl; 651 register caddr_t bpos; 652 register int i; 653 struct mbuf *mreq, *mb2; 654 int siz, grpsiz, authsiz; 655 656 authsiz = nfsm_rndup(auth_len); 657 MGETHDR(mb, M_WAIT, MT_DATA); 658 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 659 MCLGET(mb, M_WAIT); 660 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 661 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 662 } else { 663 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 664 } 665 mb->m_len = 0; 666 mreq = mb; 667 bpos = mtod(mb, caddr_t); 668 669 /* 670 * First the RPC header. 671 */ 672 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 673 674 /* Get a pretty random xid to start with */ 675 if (!nfs_xid) 676 nfs_xid = random(); 677 /* 678 * Skip zero xid if it should ever happen. 679 */ 680 if (++nfs_xid == 0) 681 nfs_xid++; 682 683 *tl++ = *xidp = txdr_unsigned(nfs_xid); 684 *tl++ = rpc_call; 685 *tl++ = rpc_vers; 686 if (nmflag & NFSMNT_NQNFS) { 687 *tl++ = txdr_unsigned(NQNFS_PROG); 688 *tl++ = txdr_unsigned(NQNFS_VER3); 689 } else { 690 *tl++ = txdr_unsigned(NFS_PROG); 691 if (nmflag & NFSMNT_NFSV3) 692 *tl++ = txdr_unsigned(NFS_VER3); 693 else 694 *tl++ = txdr_unsigned(NFS_VER2); 695 } 696 if (nmflag & NFSMNT_NFSV3) 697 *tl++ = txdr_unsigned(procid); 698 else 699 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 700 701 /* 702 * And then the authorization cred. 703 */ 704 *tl++ = txdr_unsigned(auth_type); 705 *tl = txdr_unsigned(authsiz); 706 switch (auth_type) { 707 case RPCAUTH_UNIX: 708 nfsm_build(tl, u_int32_t *, auth_len); 709 *tl++ = 0; /* stamp ?? */ 710 *tl++ = 0; /* NULL hostname */ 711 *tl++ = txdr_unsigned(cr->cr_uid); 712 *tl++ = txdr_unsigned(cr->cr_groups[0]); 713 grpsiz = (auth_len >> 2) - 5; 714 *tl++ = txdr_unsigned(grpsiz); 715 for (i = 1; i <= grpsiz; i++) 716 *tl++ = txdr_unsigned(cr->cr_groups[i]); 717 break; 718 case RPCAUTH_KERB4: 719 siz = auth_len; 720 while (siz > 0) { 721 if (M_TRAILINGSPACE(mb) == 0) { 722 MGET(mb2, M_WAIT, MT_DATA); 723 if (siz >= MINCLSIZE) 724 MCLGET(mb2, M_WAIT); 725 mb->m_next = mb2; 726 mb = mb2; 727 mb->m_len = 0; 728 bpos = mtod(mb, caddr_t); 729 } 730 i = min(siz, M_TRAILINGSPACE(mb)); 731 bcopy(auth_str, bpos, i); 732 mb->m_len += i; 733 auth_str += i; 734 bpos += i; 735 siz -= i; 736 } 737 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 738 for (i = 0; i < siz; i++) 739 *bpos++ = '\0'; 740 mb->m_len += siz; 741 } 742 break; 743 }; 744 745 /* 746 * And the verifier... 747 */ 748 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 749 if (verf_str) { 750 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 751 *tl = txdr_unsigned(verf_len); 752 siz = verf_len; 753 while (siz > 0) { 754 if (M_TRAILINGSPACE(mb) == 0) { 755 MGET(mb2, M_WAIT, MT_DATA); 756 if (siz >= MINCLSIZE) 757 MCLGET(mb2, M_WAIT); 758 mb->m_next = mb2; 759 mb = mb2; 760 mb->m_len = 0; 761 bpos = mtod(mb, caddr_t); 762 } 763 i = min(siz, M_TRAILINGSPACE(mb)); 764 bcopy(verf_str, bpos, i); 765 mb->m_len += i; 766 verf_str += i; 767 bpos += i; 768 siz -= i; 769 } 770 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 771 for (i = 0; i < siz; i++) 772 *bpos++ = '\0'; 773 mb->m_len += siz; 774 } 775 } else { 776 *tl++ = txdr_unsigned(RPCAUTH_NULL); 777 *tl = 0; 778 } 779 mb->m_next = mrest; 780 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 781 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 782 *mbp = mb; 783 return (mreq); 784} 785 786/* 787 * copies mbuf chain to the uio scatter/gather list 788 */ 789int 790nfsm_mbuftouio(mrep, uiop, siz, dpos) 791 struct mbuf **mrep; 792 register struct uio *uiop; 793 int siz; 794 caddr_t *dpos; 795{ 796 register char *mbufcp, *uiocp; 797 register int xfer, left, len; 798 register struct mbuf *mp; 799 long uiosiz, rem; 800 int error = 0; 801 802 mp = *mrep; 803 mbufcp = *dpos; 804 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 805 rem = nfsm_rndup(siz)-siz; 806 while (siz > 0) { 807 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 808 return (EFBIG); 809 left = uiop->uio_iov->iov_len; 810 uiocp = uiop->uio_iov->iov_base; 811 if (left > siz) 812 left = siz; 813 uiosiz = left; 814 while (left > 0) { 815 while (len == 0) { 816 mp = mp->m_next; 817 if (mp == NULL) 818 return (EBADRPC); 819 mbufcp = mtod(mp, caddr_t); 820 len = mp->m_len; 821 } 822 xfer = (left > len) ? len : left; 823#ifdef notdef 824 /* Not Yet.. */ 825 if (uiop->uio_iov->iov_op != NULL) 826 (*(uiop->uio_iov->iov_op)) 827 (mbufcp, uiocp, xfer); 828 else 829#endif 830 if (uiop->uio_segflg == UIO_SYSSPACE) 831 bcopy(mbufcp, uiocp, xfer); 832 else 833 copyout(mbufcp, uiocp, xfer); 834 left -= xfer; 835 len -= xfer; 836 mbufcp += xfer; 837 uiocp += xfer; 838 uiop->uio_offset += xfer; 839 uiop->uio_resid -= xfer; 840 } 841 if (uiop->uio_iov->iov_len <= siz) { 842 uiop->uio_iovcnt--; 843 uiop->uio_iov++; 844 } else { 845 uiop->uio_iov->iov_base += uiosiz; 846 uiop->uio_iov->iov_len -= uiosiz; 847 } 848 siz -= uiosiz; 849 } 850 *dpos = mbufcp; 851 *mrep = mp; 852 if (rem > 0) { 853 if (len < rem) 854 error = nfs_adv(mrep, dpos, rem, len); 855 else 856 *dpos += rem; 857 } 858 return (error); 859} 860 861/* 862 * copies a uio scatter/gather list to an mbuf chain. 863 * NOTE: can ony handle iovcnt == 1 864 */ 865int 866nfsm_uiotombuf(uiop, mq, siz, bpos) 867 register struct uio *uiop; 868 struct mbuf **mq; 869 int siz; 870 caddr_t *bpos; 871{ 872 register char *uiocp; 873 register struct mbuf *mp, *mp2; 874 register int xfer, left, mlen; 875 int uiosiz, clflg, rem; 876 char *cp; 877 878#ifdef DIAGNOSTIC 879 if (uiop->uio_iovcnt != 1) 880 panic("nfsm_uiotombuf: iovcnt != 1"); 881#endif 882 883 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 884 clflg = 1; 885 else 886 clflg = 0; 887 rem = nfsm_rndup(siz)-siz; 888 mp = mp2 = *mq; 889 while (siz > 0) { 890 left = uiop->uio_iov->iov_len; 891 uiocp = uiop->uio_iov->iov_base; 892 if (left > siz) 893 left = siz; 894 uiosiz = left; 895 while (left > 0) { 896 mlen = M_TRAILINGSPACE(mp); 897 if (mlen == 0) { 898 MGET(mp, M_WAIT, MT_DATA); 899 if (clflg) 900 MCLGET(mp, M_WAIT); 901 mp->m_len = 0; 902 mp2->m_next = mp; 903 mp2 = mp; 904 mlen = M_TRAILINGSPACE(mp); 905 } 906 xfer = (left > mlen) ? mlen : left; 907#ifdef notdef 908 /* Not Yet.. */ 909 if (uiop->uio_iov->iov_op != NULL) 910 (*(uiop->uio_iov->iov_op)) 911 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 912 else 913#endif 914 if (uiop->uio_segflg == UIO_SYSSPACE) 915 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 916 else 917 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 918 mp->m_len += xfer; 919 left -= xfer; 920 uiocp += xfer; 921 uiop->uio_offset += xfer; 922 uiop->uio_resid -= xfer; 923 } 924 uiop->uio_iov->iov_base += uiosiz; 925 uiop->uio_iov->iov_len -= uiosiz; 926 siz -= uiosiz; 927 } 928 if (rem > 0) { 929 if (rem > M_TRAILINGSPACE(mp)) { 930 MGET(mp, M_WAIT, MT_DATA); 931 mp->m_len = 0; 932 mp2->m_next = mp; 933 } 934 cp = mtod(mp, caddr_t)+mp->m_len; 935 for (left = 0; left < rem; left++) 936 *cp++ = '\0'; 937 mp->m_len += rem; 938 *bpos = cp; 939 } else 940 *bpos = mtod(mp, caddr_t)+mp->m_len; 941 *mq = mp; 942 return (0); 943} 944 945/* 946 * Help break down an mbuf chain by setting the first siz bytes contiguous 947 * pointed to by returned val. 948 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 949 * cases. (The macros use the vars. dpos and dpos2) 950 */ 951int 952nfsm_disct(mdp, dposp, siz, left, cp2) 953 struct mbuf **mdp; 954 caddr_t *dposp; 955 int siz; 956 int left; 957 caddr_t *cp2; 958{ 959 register struct mbuf *mp, *mp2; 960 register int siz2, xfer; 961 register caddr_t p; 962 963 mp = *mdp; 964 while (left == 0) { 965 *mdp = mp = mp->m_next; 966 if (mp == NULL) 967 return (EBADRPC); 968 left = mp->m_len; 969 *dposp = mtod(mp, caddr_t); 970 } 971 if (left >= siz) { 972 *cp2 = *dposp; 973 *dposp += siz; 974 } else if (mp->m_next == NULL) { 975 return (EBADRPC); 976 } else if (siz > MHLEN) { 977 panic("nfs S too big"); 978 } else { 979 MGET(mp2, M_WAIT, MT_DATA); 980 mp2->m_next = mp->m_next; 981 mp->m_next = mp2; 982 mp->m_len -= left; 983 mp = mp2; 984 *cp2 = p = mtod(mp, caddr_t); 985 bcopy(*dposp, p, left); /* Copy what was left */ 986 siz2 = siz-left; 987 p += left; 988 mp2 = mp->m_next; 989 /* Loop around copying up the siz2 bytes */ 990 while (siz2 > 0) { 991 if (mp2 == NULL) 992 return (EBADRPC); 993 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 994 if (xfer > 0) { 995 bcopy(mtod(mp2, caddr_t), p, xfer); 996 NFSMADV(mp2, xfer); 997 mp2->m_len -= xfer; 998 p += xfer; 999 siz2 -= xfer; 1000 } 1001 if (siz2 > 0) 1002 mp2 = mp2->m_next; 1003 } 1004 mp->m_len = siz; 1005 *mdp = mp2; 1006 *dposp = mtod(mp2, caddr_t); 1007 } 1008 return (0); 1009} 1010 1011/* 1012 * Advance the position in the mbuf chain. 1013 */ 1014int 1015nfs_adv(mdp, dposp, offs, left) 1016 struct mbuf **mdp; 1017 caddr_t *dposp; 1018 int offs; 1019 int left; 1020{ 1021 register struct mbuf *m; 1022 register int s; 1023 1024 m = *mdp; 1025 s = left; 1026 while (s < offs) { 1027 offs -= s; 1028 m = m->m_next; 1029 if (m == NULL) 1030 return (EBADRPC); 1031 s = m->m_len; 1032 } 1033 *mdp = m; 1034 *dposp = mtod(m, caddr_t)+offs; 1035 return (0); 1036} 1037 1038/* 1039 * Copy a string into mbufs for the hard cases... 1040 */ 1041int 1042nfsm_strtmbuf(mb, bpos, cp, siz) 1043 struct mbuf **mb; 1044 char **bpos; 1045 const char *cp; 1046 long siz; 1047{ 1048 register struct mbuf *m1 = NULL, *m2; 1049 long left, xfer, len, tlen; 1050 u_int32_t *tl; 1051 int putsize; 1052 1053 putsize = 1; 1054 m2 = *mb; 1055 left = M_TRAILINGSPACE(m2); 1056 if (left > 0) { 1057 tl = ((u_int32_t *)(*bpos)); 1058 *tl++ = txdr_unsigned(siz); 1059 putsize = 0; 1060 left -= NFSX_UNSIGNED; 1061 m2->m_len += NFSX_UNSIGNED; 1062 if (left > 0) { 1063 bcopy(cp, (caddr_t) tl, left); 1064 siz -= left; 1065 cp += left; 1066 m2->m_len += left; 1067 left = 0; 1068 } 1069 } 1070 /* Loop around adding mbufs */ 1071 while (siz > 0) { 1072 MGET(m1, M_WAIT, MT_DATA); 1073 if (siz > MLEN) 1074 MCLGET(m1, M_WAIT); 1075 m1->m_len = NFSMSIZ(m1); 1076 m2->m_next = m1; 1077 m2 = m1; 1078 tl = mtod(m1, u_int32_t *); 1079 tlen = 0; 1080 if (putsize) { 1081 *tl++ = txdr_unsigned(siz); 1082 m1->m_len -= NFSX_UNSIGNED; 1083 tlen = NFSX_UNSIGNED; 1084 putsize = 0; 1085 } 1086 if (siz < m1->m_len) { 1087 len = nfsm_rndup(siz); 1088 xfer = siz; 1089 if (xfer < len) 1090 *(tl+(xfer>>2)) = 0; 1091 } else { 1092 xfer = len = m1->m_len; 1093 } 1094 bcopy(cp, (caddr_t) tl, xfer); 1095 m1->m_len = len+tlen; 1096 siz -= xfer; 1097 cp += xfer; 1098 } 1099 *mb = m1; 1100 *bpos = mtod(m1, caddr_t)+m1->m_len; 1101 return (0); 1102} 1103 1104/* 1105 * Called once to initialize data structures... 1106 */ 1107int 1108nfs_init(vfsp) 1109 struct vfsconf *vfsp; 1110{ 1111 register int i; 1112 1113 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1114 1115 /* 1116 * Check to see if major data structures haven't bloated. 1117 */ 1118 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1119 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1120 printf("Try reducing NFS_UIDHASHSIZ\n"); 1121 } 1122 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1123 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1124 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1125 } 1126 nfs_mount_type = vfsp->vfc_typenum; 1127 nfsrtt.pos = 0; 1128 rpc_vers = txdr_unsigned(RPC_VER2); 1129 rpc_call = txdr_unsigned(RPC_CALL); 1130 rpc_reply = txdr_unsigned(RPC_REPLY); 1131 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1132 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1133 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1134 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1135 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1136 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1137 nfs_prog = txdr_unsigned(NFS_PROG); 1138 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1139 nfs_true = txdr_unsigned(TRUE); 1140 nfs_false = txdr_unsigned(FALSE); 1141 nfs_xdrneg1 = txdr_unsigned(-1); 1142 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1143 if (nfs_ticks < 1) 1144 nfs_ticks = 1; 1145 /* Ensure async daemons disabled */ 1146 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1147 nfs_iodwant[i] = (struct proc *)0; 1148 nfs_iodmount[i] = (struct nfsmount *)0; 1149 } 1150 nfs_nhinit(); /* Init the nfsnode table */ 1151#ifndef NFS_NOSERVER 1152 nfsrv_init(0); /* Init server data structures */ 1153 nfsrv_initcache(); /* Init the server request cache */ 1154#endif 1155 1156 /* 1157 * Initialize the nqnfs server stuff. 1158 */ 1159 if (nqnfsstarttime == 0) { 1160 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1161 + nqsrv_clockskew + nqsrv_writeslack; 1162 NQLOADNOVRAM(nqnfsstarttime); 1163 CIRCLEQ_INIT(&nqtimerhead); 1164 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1165 } 1166 1167 /* 1168 * Initialize reply list and start timer 1169 */ 1170 TAILQ_INIT(&nfs_reqq); 1171 1172 nfs_timer(0); 1173 1174 /* 1175 * Set up lease_check and lease_updatetime so that other parts 1176 * of the system can call us, if we are loadable. 1177 */ 1178#ifndef NFS_NOSERVER 1179 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1180 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1181#endif 1182 nfs_prev_lease_updatetime = lease_updatetime; 1183 lease_updatetime = nfs_lease_updatetime; 1184 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1185 sysent[SYS_nfssvc].sy_narg = 2; 1186 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1187 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1188#ifndef NFS_NOSERVER 1189 nfs_prev_getfh_sy_narg = sysent[SYS_getfh].sy_narg; 1190 sysent[SYS_getfh].sy_narg = 2; 1191 nfs_prev_getfh_sy_call = sysent[SYS_getfh].sy_call; 1192 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1193#endif 1194 1195 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1196 1197 return (0); 1198} 1199 1200int 1201nfs_uninit(vfsp) 1202 struct vfsconf *vfsp; 1203{ 1204 1205 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1206 nfs_mount_type = -1; 1207#ifndef NFS_NOSERVER 1208 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1209#endif 1210 lease_updatetime = nfs_prev_lease_updatetime; 1211 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1212 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1213#ifndef NFS_NOSERVER 1214 sysent[SYS_getfh].sy_narg = nfs_prev_getfh_sy_narg; 1215 sysent[SYS_getfh].sy_call = nfs_prev_getfh_sy_call; 1216#endif 1217 return (0); 1218} 1219 1220/* 1221 * Attribute cache routines. 1222 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1223 * that are on the mbuf list 1224 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1225 * error otherwise 1226 */ 1227 1228/* 1229 * Load the attribute cache (that lives in the nfsnode entry) with 1230 * the values on the mbuf list and 1231 * Iff vap not NULL 1232 * copy the attributes to *vaper 1233 */ 1234int 1235nfs_loadattrcache(vpp, mdp, dposp, vaper) 1236 struct vnode **vpp; 1237 struct mbuf **mdp; 1238 caddr_t *dposp; 1239 struct vattr *vaper; 1240{ 1241 register struct vnode *vp = *vpp; 1242 register struct vattr *vap; 1243 register struct nfs_fattr *fp; 1244 register struct nfsnode *np; 1245 register int32_t t1; 1246 caddr_t cp2; 1247 int error = 0, rdev; 1248 struct mbuf *md; 1249 enum vtype vtyp; 1250 u_short vmode; 1251 struct timespec mtime; 1252 struct vnode *nvp; 1253 int v3 = NFS_ISV3(vp); 1254 1255 md = *mdp; 1256 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1257 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1258 return (error); 1259 fp = (struct nfs_fattr *)cp2; 1260 if (v3) { 1261 vtyp = nfsv3tov_type(fp->fa_type); 1262 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1263 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1264 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1265 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1266 } else { 1267 vtyp = nfsv2tov_type(fp->fa_type); 1268 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1269 /* 1270 * XXX 1271 * 1272 * The duplicate information returned in fa_type and fa_mode 1273 * is an ambiguity in the NFS version 2 protocol. 1274 * 1275 * VREG should be taken literally as a regular file. If a 1276 * server intents to return some type information differently 1277 * in the upper bits of the mode field (e.g. for sockets, or 1278 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1279 * leave the examination of the mode bits even in the VREG 1280 * case to avoid breakage for bogus servers, but we make sure 1281 * that there are actually type bits set in the upper part of 1282 * fa_mode (and failing that, trust the va_type field). 1283 * 1284 * NFSv3 cleared the issue, and requires fa_mode to not 1285 * contain any type information (while also introduing sockets 1286 * and FIFOs for fa_type). 1287 */ 1288 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1289 vtyp = IFTOVT(vmode); 1290 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1291 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1292 1293 /* 1294 * Really ugly NFSv2 kludge. 1295 */ 1296 if (vtyp == VCHR && rdev == 0xffffffff) 1297 vtyp = VFIFO; 1298 } 1299 1300 /* 1301 * If v_type == VNON it is a new node, so fill in the v_type, 1302 * n_mtime fields. Check to see if it represents a special 1303 * device, and if so, check for a possible alias. Once the 1304 * correct vnode has been obtained, fill in the rest of the 1305 * information. 1306 */ 1307 np = VTONFS(vp); 1308 if (vp->v_type != vtyp) { 1309 vp->v_type = vtyp; 1310 if (vp->v_type == VFIFO) { 1311 vp->v_op = fifo_nfsv2nodeop_p; 1312 } 1313 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1314 vp->v_op = spec_nfsv2nodeop_p; 1315 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1316 if (nvp) { 1317 /* 1318 * Discard unneeded vnode, but save its nfsnode. 1319 * Since the nfsnode does not have a lock, its 1320 * vnode lock has to be carried over. 1321 */ 1322 nvp->v_vnlock = vp->v_vnlock; 1323 vp->v_vnlock = NULL; 1324 nvp->v_data = vp->v_data; 1325 vp->v_data = NULL; 1326 vp->v_op = spec_vnodeop_p; 1327 vrele(vp); 1328 vgone(vp); 1329 /* 1330 * Reinitialize aliased node. 1331 */ 1332 np->n_vnode = nvp; 1333 *vpp = vp = nvp; 1334 } 1335 } 1336 np->n_mtime = mtime.tv_sec; 1337 } 1338 vap = &np->n_vattr; 1339 vap->va_type = vtyp; 1340 vap->va_mode = (vmode & 07777); 1341 vap->va_rdev = (dev_t)rdev; 1342 vap->va_mtime = mtime; 1343 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1344 if (v3) { 1345 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1346 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1347 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1348 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1349 vap->va_blocksize = NFS_FABLKSIZE; 1350 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1351 vap->va_fileid = fxdr_unsigned(int32_t, 1352 fp->fa3_fileid.nfsuquad[1]); 1353 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1354 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1355 vap->va_flags = 0; 1356 vap->va_filerev = 0; 1357 } else { 1358 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1359 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1360 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1361 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1362 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1363 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1364 * NFS_FABLKSIZE; 1365 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1366 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1367 vap->va_flags = 0; 1368 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1369 fp->fa2_ctime.nfsv2_sec); 1370 vap->va_ctime.tv_nsec = 0; 1371 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1372 vap->va_filerev = 0; 1373 } 1374 if (vap->va_size != np->n_size) { 1375 if (vap->va_type == VREG) { 1376 if (np->n_flag & NMODIFIED) { 1377 if (vap->va_size < np->n_size) 1378 vap->va_size = np->n_size; 1379 else 1380 np->n_size = vap->va_size; 1381 } else 1382 np->n_size = vap->va_size; 1383 vnode_pager_setsize(vp, np->n_size); 1384 } else 1385 np->n_size = vap->va_size; 1386 } 1387 np->n_attrstamp = time_second; 1388 if (vaper != NULL) { 1389 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1390 if (np->n_flag & NCHG) { 1391 if (np->n_flag & NACC) 1392 vaper->va_atime = np->n_atim; 1393 if (np->n_flag & NUPD) 1394 vaper->va_mtime = np->n_mtim; 1395 } 1396 } 1397 return (0); 1398} 1399 1400#ifdef NFS_ACDEBUG 1401#include <sys/sysctl.h> 1402static int nfs_acdebug; 1403SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1404#endif 1405 1406/* 1407 * Check the time stamp 1408 * If the cache is valid, copy contents to *vap and return 0 1409 * otherwise return an error 1410 */ 1411int 1412nfs_getattrcache(vp, vaper) 1413 register struct vnode *vp; 1414 struct vattr *vaper; 1415{ 1416 register struct nfsnode *np; 1417 register struct vattr *vap; 1418 struct nfsmount *nmp; 1419 int timeo; 1420 1421 np = VTONFS(vp); 1422 vap = &np->n_vattr; 1423 nmp = VFSTONFS(vp->v_mount); 1424 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1425 timeo = (time_second - np->n_mtime) / 10; 1426 1427#ifdef NFS_ACDEBUG 1428 if (nfs_acdebug>1) 1429 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1430#endif 1431 1432 if (vap->va_type == VDIR) { 1433 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1434 timeo = nmp->nm_acdirmin; 1435 else if (timeo > nmp->nm_acdirmax) 1436 timeo = nmp->nm_acdirmax; 1437 } else { 1438 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1439 timeo = nmp->nm_acregmin; 1440 else if (timeo > nmp->nm_acregmax) 1441 timeo = nmp->nm_acregmax; 1442 } 1443 1444#ifdef NFS_ACDEBUG 1445 if (nfs_acdebug > 2) 1446 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1447 nmp->nm_acregmin, nmp->nm_acregmax, 1448 nmp->nm_acdirmin, nmp->nm_acdirmax); 1449 1450 if (nfs_acdebug) 1451 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1452 (time_second - np->n_attrstamp), timeo); 1453#endif 1454 1455 if ((time_second - np->n_attrstamp) >= timeo) { 1456 nfsstats.attrcache_misses++; 1457 return (ENOENT); 1458 } 1459 nfsstats.attrcache_hits++; 1460 if (vap->va_size != np->n_size) { 1461 if (vap->va_type == VREG) { 1462 if (np->n_flag & NMODIFIED) { 1463 if (vap->va_size < np->n_size) 1464 vap->va_size = np->n_size; 1465 else 1466 np->n_size = vap->va_size; 1467 } else 1468 np->n_size = vap->va_size; 1469 vnode_pager_setsize(vp, np->n_size); 1470 } else 1471 np->n_size = vap->va_size; 1472 } 1473 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1474 if (np->n_flag & NCHG) { 1475 if (np->n_flag & NACC) 1476 vaper->va_atime = np->n_atim; 1477 if (np->n_flag & NUPD) 1478 vaper->va_mtime = np->n_mtim; 1479 } 1480 return (0); 1481} 1482 1483#ifndef NFS_NOSERVER 1484/* 1485 * Set up nameidata for a lookup() call and do it. 1486 * 1487 * If pubflag is set, this call is done for a lookup operation on the 1488 * public filehandle. In that case we allow crossing mountpoints and 1489 * absolute pathnames. However, the caller is expected to check that 1490 * the lookup result is within the public fs, and deny access if 1491 * it is not. 1492 */ 1493int 1494nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1495 register struct nameidata *ndp; 1496 fhandle_t *fhp; 1497 int len; 1498 struct nfssvc_sock *slp; 1499 struct sockaddr *nam; 1500 struct mbuf **mdp; 1501 caddr_t *dposp; 1502 struct vnode **retdirp; 1503 struct proc *p; 1504 int kerbflag, pubflag; 1505{ 1506 register int i, rem; 1507 register struct mbuf *md; 1508 register char *fromcp, *tocp, *cp; 1509 struct iovec aiov; 1510 struct uio auio; 1511 struct vnode *dp; 1512 int error, rdonly, linklen; 1513 struct componentname *cnp = &ndp->ni_cnd; 1514 1515 *retdirp = (struct vnode *)0; 1516 cnp->cn_pnbuf = zalloc(namei_zone); 1517 1518 /* 1519 * Copy the name from the mbuf list to ndp->ni_pnbuf 1520 * and set the various ndp fields appropriately. 1521 */ 1522 fromcp = *dposp; 1523 tocp = cnp->cn_pnbuf; 1524 md = *mdp; 1525 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1526 cnp->cn_hash = 0; 1527 for (i = 0; i < len; i++) { 1528 while (rem == 0) { 1529 md = md->m_next; 1530 if (md == NULL) { 1531 error = EBADRPC; 1532 goto out; 1533 } 1534 fromcp = mtod(md, caddr_t); 1535 rem = md->m_len; 1536 } 1537 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1538 error = EACCES; 1539 goto out; 1540 } 1541 cnp->cn_hash += (unsigned char)*fromcp; 1542 *tocp++ = *fromcp++; 1543 rem--; 1544 } 1545 *tocp = '\0'; 1546 *mdp = md; 1547 *dposp = fromcp; 1548 len = nfsm_rndup(len)-len; 1549 if (len > 0) { 1550 if (rem >= len) 1551 *dposp += len; 1552 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1553 goto out; 1554 } 1555 1556 /* 1557 * Extract and set starting directory. 1558 */ 1559 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1560 nam, &rdonly, kerbflag, pubflag); 1561 if (error) 1562 goto out; 1563 if (dp->v_type != VDIR) { 1564 vrele(dp); 1565 error = ENOTDIR; 1566 goto out; 1567 } 1568 1569 if (rdonly) 1570 cnp->cn_flags |= RDONLY; 1571 1572 *retdirp = dp; 1573 1574 if (pubflag) { 1575 /* 1576 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1577 * and the 'native path' indicator. 1578 */ 1579 cp = zalloc(namei_zone); 1580 fromcp = cnp->cn_pnbuf; 1581 tocp = cp; 1582 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1583 switch ((unsigned char)*fromcp) { 1584 case WEBNFS_NATIVE_CHAR: 1585 /* 1586 * 'Native' path for us is the same 1587 * as a path according to the NFS spec, 1588 * just skip the escape char. 1589 */ 1590 fromcp++; 1591 break; 1592 /* 1593 * More may be added in the future, range 0x80-0xff 1594 */ 1595 default: 1596 error = EIO; 1597 zfree(namei_zone, cp); 1598 goto out; 1599 } 1600 } 1601 /* 1602 * Translate the '%' escapes, URL-style. 1603 */ 1604 while (*fromcp != '\0') { 1605 if (*fromcp == WEBNFS_ESC_CHAR) { 1606 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1607 fromcp++; 1608 *tocp++ = HEXSTRTOI(fromcp); 1609 fromcp += 2; 1610 continue; 1611 } else { 1612 error = ENOENT; 1613 zfree(namei_zone, cp); 1614 goto out; 1615 } 1616 } else 1617 *tocp++ = *fromcp++; 1618 } 1619 *tocp = '\0'; 1620 zfree(namei_zone, cnp->cn_pnbuf); 1621 cnp->cn_pnbuf = cp; 1622 } 1623 1624 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1625 ndp->ni_segflg = UIO_SYSSPACE; 1626 1627 if (pubflag) { 1628 ndp->ni_rootdir = rootvnode; 1629 ndp->ni_loopcnt = 0; 1630 if (cnp->cn_pnbuf[0] == '/') 1631 dp = rootvnode; 1632 } else { 1633 cnp->cn_flags |= NOCROSSMOUNT; 1634 } 1635 1636 cnp->cn_proc = p; 1637 VREF(dp); 1638 1639 for (;;) { 1640 cnp->cn_nameptr = cnp->cn_pnbuf; 1641 ndp->ni_startdir = dp; 1642 /* 1643 * And call lookup() to do the real work 1644 */ 1645 error = lookup(ndp); 1646 if (error) 1647 break; 1648 /* 1649 * Check for encountering a symbolic link 1650 */ 1651 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1652 nfsrv_object_create(ndp->ni_vp); 1653 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1654 cnp->cn_flags |= HASBUF; 1655 return (0); 1656 } 1657 break; 1658 } else { 1659 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1660 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1661 if (!pubflag) { 1662 vrele(ndp->ni_dvp); 1663 vput(ndp->ni_vp); 1664 ndp->ni_vp = NULL; 1665 error = EINVAL; 1666 break; 1667 } 1668 1669 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1670 error = ELOOP; 1671 break; 1672 } 1673 if (ndp->ni_pathlen > 1) 1674 cp = zalloc(namei_zone); 1675 else 1676 cp = cnp->cn_pnbuf; 1677 aiov.iov_base = cp; 1678 aiov.iov_len = MAXPATHLEN; 1679 auio.uio_iov = &aiov; 1680 auio.uio_iovcnt = 1; 1681 auio.uio_offset = 0; 1682 auio.uio_rw = UIO_READ; 1683 auio.uio_segflg = UIO_SYSSPACE; 1684 auio.uio_procp = (struct proc *)0; 1685 auio.uio_resid = MAXPATHLEN; 1686 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1687 if (error) { 1688 badlink: 1689 if (ndp->ni_pathlen > 1) 1690 zfree(namei_zone, cp); 1691 break; 1692 } 1693 linklen = MAXPATHLEN - auio.uio_resid; 1694 if (linklen == 0) { 1695 error = ENOENT; 1696 goto badlink; 1697 } 1698 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1699 error = ENAMETOOLONG; 1700 goto badlink; 1701 } 1702 if (ndp->ni_pathlen > 1) { 1703 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1704 zfree(namei_zone, cnp->cn_pnbuf); 1705 cnp->cn_pnbuf = cp; 1706 } else 1707 cnp->cn_pnbuf[linklen] = '\0'; 1708 ndp->ni_pathlen += linklen; 1709 vput(ndp->ni_vp); 1710 dp = ndp->ni_dvp; 1711 /* 1712 * Check if root directory should replace current directory. 1713 */ 1714 if (cnp->cn_pnbuf[0] == '/') { 1715 vrele(dp); 1716 dp = ndp->ni_rootdir; 1717 VREF(dp); 1718 } 1719 } 1720 } 1721out: 1722 zfree(namei_zone, cnp->cn_pnbuf); 1723 return (error); 1724} 1725 1726/* 1727 * A fiddled version of m_adj() that ensures null fill to a long 1728 * boundary and only trims off the back end 1729 */ 1730void 1731nfsm_adj(mp, len, nul) 1732 struct mbuf *mp; 1733 register int len; 1734 int nul; 1735{ 1736 register struct mbuf *m; 1737 register int count, i; 1738 register char *cp; 1739 1740 /* 1741 * Trim from tail. Scan the mbuf chain, 1742 * calculating its length and finding the last mbuf. 1743 * If the adjustment only affects this mbuf, then just 1744 * adjust and return. Otherwise, rescan and truncate 1745 * after the remaining size. 1746 */ 1747 count = 0; 1748 m = mp; 1749 for (;;) { 1750 count += m->m_len; 1751 if (m->m_next == (struct mbuf *)0) 1752 break; 1753 m = m->m_next; 1754 } 1755 if (m->m_len > len) { 1756 m->m_len -= len; 1757 if (nul > 0) { 1758 cp = mtod(m, caddr_t)+m->m_len-nul; 1759 for (i = 0; i < nul; i++) 1760 *cp++ = '\0'; 1761 } 1762 return; 1763 } 1764 count -= len; 1765 if (count < 0) 1766 count = 0; 1767 /* 1768 * Correct length for chain is "count". 1769 * Find the mbuf with last data, adjust its length, 1770 * and toss data from remaining mbufs on chain. 1771 */ 1772 for (m = mp; m; m = m->m_next) { 1773 if (m->m_len >= count) { 1774 m->m_len = count; 1775 if (nul > 0) { 1776 cp = mtod(m, caddr_t)+m->m_len-nul; 1777 for (i = 0; i < nul; i++) 1778 *cp++ = '\0'; 1779 } 1780 break; 1781 } 1782 count -= m->m_len; 1783 } 1784 for (m = m->m_next;m;m = m->m_next) 1785 m->m_len = 0; 1786} 1787 1788/* 1789 * Make these functions instead of macros, so that the kernel text size 1790 * doesn't get too big... 1791 */ 1792void 1793nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1794 struct nfsrv_descript *nfsd; 1795 int before_ret; 1796 register struct vattr *before_vap; 1797 int after_ret; 1798 struct vattr *after_vap; 1799 struct mbuf **mbp; 1800 char **bposp; 1801{ 1802 register struct mbuf *mb = *mbp, *mb2; 1803 register char *bpos = *bposp; 1804 register u_int32_t *tl; 1805 1806 if (before_ret) { 1807 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1808 *tl = nfs_false; 1809 } else { 1810 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1811 *tl++ = nfs_true; 1812 txdr_hyper(&(before_vap->va_size), tl); 1813 tl += 2; 1814 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1815 tl += 2; 1816 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1817 } 1818 *bposp = bpos; 1819 *mbp = mb; 1820 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1821} 1822 1823void 1824nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1825 struct nfsrv_descript *nfsd; 1826 int after_ret; 1827 struct vattr *after_vap; 1828 struct mbuf **mbp; 1829 char **bposp; 1830{ 1831 register struct mbuf *mb = *mbp, *mb2; 1832 register char *bpos = *bposp; 1833 register u_int32_t *tl; 1834 register struct nfs_fattr *fp; 1835 1836 if (after_ret) { 1837 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1838 *tl = nfs_false; 1839 } else { 1840 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1841 *tl++ = nfs_true; 1842 fp = (struct nfs_fattr *)tl; 1843 nfsm_srvfattr(nfsd, after_vap, fp); 1844 } 1845 *mbp = mb; 1846 *bposp = bpos; 1847} 1848 1849void 1850nfsm_srvfattr(nfsd, vap, fp) 1851 register struct nfsrv_descript *nfsd; 1852 register struct vattr *vap; 1853 register struct nfs_fattr *fp; 1854{ 1855 1856 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1857 fp->fa_uid = txdr_unsigned(vap->va_uid); 1858 fp->fa_gid = txdr_unsigned(vap->va_gid); 1859 if (nfsd->nd_flag & ND_NFSV3) { 1860 fp->fa_type = vtonfsv3_type(vap->va_type); 1861 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1862 txdr_hyper(&vap->va_size, &fp->fa3_size); 1863 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1864 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1865 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1866 fp->fa3_fsid.nfsuquad[0] = 0; 1867 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1868 fp->fa3_fileid.nfsuquad[0] = 0; 1869 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1870 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1871 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1872 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1873 } else { 1874 fp->fa_type = vtonfsv2_type(vap->va_type); 1875 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1876 fp->fa2_size = txdr_unsigned(vap->va_size); 1877 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1878 if (vap->va_type == VFIFO) 1879 fp->fa2_rdev = 0xffffffff; 1880 else 1881 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1882 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1883 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1884 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1885 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1886 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1887 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1888 } 1889} 1890 1891/* 1892 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1893 * - look up fsid in mount list (if not found ret error) 1894 * - get vp and export rights by calling VFS_FHTOVP() 1895 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1896 * - if not lockflag unlock it with VOP_UNLOCK() 1897 */ 1898int 1899nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1900 fhandle_t *fhp; 1901 int lockflag; 1902 struct vnode **vpp; 1903 struct ucred *cred; 1904 struct nfssvc_sock *slp; 1905 struct sockaddr *nam; 1906 int *rdonlyp; 1907 int kerbflag; 1908 int pubflag; 1909{ 1910 struct proc *p = curproc; /* XXX */ 1911 register struct mount *mp; 1912 register int i; 1913 struct ucred *credanon; 1914 int error, exflags; 1915#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1916 struct sockaddr_int *saddr; 1917#endif 1918 1919 *vpp = (struct vnode *)0; 1920 1921 if (nfs_ispublicfh(fhp)) { 1922 if (!pubflag || !nfs_pub.np_valid) 1923 return (ESTALE); 1924 fhp = &nfs_pub.np_handle; 1925 } 1926 1927 mp = vfs_getvfs(&fhp->fh_fsid); 1928 if (!mp) 1929 return (ESTALE); 1930 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1931 if (error) 1932 return (error); 1933#ifdef MNT_EXNORESPORT 1934 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1935 saddr = (struct sockaddr_in *)nam; 1936 if (saddr->sin_family == AF_INET && 1937 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1938 vput(*vpp); 1939 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1940 } 1941 } 1942#endif 1943 /* 1944 * Check/setup credentials. 1945 */ 1946 if (exflags & MNT_EXKERB) { 1947 if (!kerbflag) { 1948 vput(*vpp); 1949 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1950 } 1951 } else if (kerbflag) { 1952 vput(*vpp); 1953 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1954 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1955 cred->cr_uid = credanon->cr_uid; 1956 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1957 cred->cr_groups[i] = credanon->cr_groups[i]; 1958 cred->cr_ngroups = i; 1959 } 1960 if (exflags & MNT_EXRDONLY) 1961 *rdonlyp = 1; 1962 else 1963 *rdonlyp = 0; 1964 1965 nfsrv_object_create(*vpp); 1966 1967 if (!lockflag) 1968 VOP_UNLOCK(*vpp, 0, p); 1969 return (0); 1970} 1971 1972 1973/* 1974 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1975 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1976 * transformed this to all zeroes in both cases, so check for it. 1977 */ 1978int 1979nfs_ispublicfh(fhp) 1980 fhandle_t *fhp; 1981{ 1982 char *cp = (char *)fhp; 1983 int i; 1984 1985 for (i = 0; i < NFSX_V3FH; i++) 1986 if (*cp++ != 0) 1987 return (FALSE); 1988 return (TRUE); 1989} 1990 1991#endif /* NFS_NOSERVER */ 1992/* 1993 * This function compares two net addresses by family and returns TRUE 1994 * if they are the same host. 1995 * If there is any doubt, return FALSE. 1996 * The AF_INET family is handled as a special case so that address mbufs 1997 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1998 */ 1999int 2000netaddr_match(family, haddr, nam) 2001 int family; 2002 union nethostaddr *haddr; 2003 struct sockaddr *nam; 2004{ 2005 register struct sockaddr_in *inetaddr; 2006 2007 switch (family) { 2008 case AF_INET: 2009 inetaddr = (struct sockaddr_in *)nam; 2010 if (inetaddr->sin_family == AF_INET && 2011 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2012 return (1); 2013 break; 2014#ifdef ISO 2015 case AF_ISO: 2016 { 2017 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2018 2019 isoaddr1 = (struct sockaddr_iso *)nam; 2020 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2021 if (isoaddr1->siso_family == AF_ISO && 2022 isoaddr1->siso_nlen > 0 && 2023 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2024 SAME_ISOADDR(isoaddr1, isoaddr2)) 2025 return (1); 2026 break; 2027 } 2028#endif /* ISO */ 2029 default: 2030 break; 2031 }; 2032 return (0); 2033} 2034 2035static nfsuint64 nfs_nullcookie = { 0, 0 }; 2036/* 2037 * This function finds the directory cookie that corresponds to the 2038 * logical byte offset given. 2039 */ 2040nfsuint64 * 2041nfs_getcookie(np, off, add) 2042 register struct nfsnode *np; 2043 off_t off; 2044 int add; 2045{ 2046 register struct nfsdmap *dp, *dp2; 2047 register int pos; 2048 2049 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2050 if (pos == 0 || off < 0) { 2051#ifdef DIAGNOSTIC 2052 if (add) 2053 panic("nfs getcookie add at <= 0"); 2054#endif 2055 return (&nfs_nullcookie); 2056 } 2057 pos--; 2058 dp = np->n_cookies.lh_first; 2059 if (!dp) { 2060 if (add) { 2061 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2062 M_NFSDIROFF, M_WAITOK); 2063 dp->ndm_eocookie = 0; 2064 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2065 } else 2066 return ((nfsuint64 *)0); 2067 } 2068 while (pos >= NFSNUMCOOKIES) { 2069 pos -= NFSNUMCOOKIES; 2070 if (dp->ndm_list.le_next) { 2071 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2072 pos >= dp->ndm_eocookie) 2073 return ((nfsuint64 *)0); 2074 dp = dp->ndm_list.le_next; 2075 } else if (add) { 2076 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2077 M_NFSDIROFF, M_WAITOK); 2078 dp2->ndm_eocookie = 0; 2079 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2080 dp = dp2; 2081 } else 2082 return ((nfsuint64 *)0); 2083 } 2084 if (pos >= dp->ndm_eocookie) { 2085 if (add) 2086 dp->ndm_eocookie = pos + 1; 2087 else 2088 return ((nfsuint64 *)0); 2089 } 2090 return (&dp->ndm_cookies[pos]); 2091} 2092 2093/* 2094 * Invalidate cached directory information, except for the actual directory 2095 * blocks (which are invalidated separately). 2096 * Done mainly to avoid the use of stale offset cookies. 2097 */ 2098void 2099nfs_invaldir(vp) 2100 register struct vnode *vp; 2101{ 2102 register struct nfsnode *np = VTONFS(vp); 2103 2104#ifdef DIAGNOSTIC 2105 if (vp->v_type != VDIR) 2106 panic("nfs: invaldir not dir"); 2107#endif 2108 np->n_direofoffset = 0; 2109 np->n_cookieverf.nfsuquad[0] = 0; 2110 np->n_cookieverf.nfsuquad[1] = 0; 2111 if (np->n_cookies.lh_first) 2112 np->n_cookies.lh_first->ndm_eocookie = 0; 2113} 2114 2115/* 2116 * The write verifier has changed (probably due to a server reboot), so all 2117 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2118 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2119 * flag. Once done the new write verifier can be set for the mount point. 2120 */ 2121void 2122nfs_clearcommit(mp) 2123 struct mount *mp; 2124{ 2125 register struct vnode *vp, *nvp; 2126 register struct buf *bp, *nbp; 2127 int s; 2128 2129 s = splbio(); 2130loop: 2131 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2132 if (vp->v_mount != mp) /* Paranoia */ 2133 goto loop; 2134 nvp = vp->v_mntvnodes.le_next; 2135 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2136 nbp = TAILQ_NEXT(bp, b_vnbufs); 2137 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2138 == (B_DELWRI | B_NEEDCOMMIT)) 2139 bp->b_flags &= ~B_NEEDCOMMIT; 2140 } 2141 } 2142 splx(s); 2143} 2144 2145#ifndef NFS_NOSERVER 2146/* 2147 * Map errnos to NFS error numbers. For Version 3 also filter out error 2148 * numbers not specified for the associated procedure. 2149 */ 2150int 2151nfsrv_errmap(nd, err) 2152 struct nfsrv_descript *nd; 2153 register int err; 2154{ 2155 register short *defaulterrp, *errp; 2156 2157 if (nd->nd_flag & ND_NFSV3) { 2158 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2159 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2160 while (*++errp) { 2161 if (*errp == err) 2162 return (err); 2163 else if (*errp > err) 2164 break; 2165 } 2166 return ((int)*defaulterrp); 2167 } else 2168 return (err & 0xffff); 2169 } 2170 if (err <= ELAST) 2171 return ((int)nfsrv_v2errmap[err - 1]); 2172 return (NFSERR_IO); 2173} 2174 2175int 2176nfsrv_object_create(vp) 2177 struct vnode *vp; 2178{ 2179 2180 if (vp == NULL || vp->v_type != VREG) 2181 return (1); 2182 return (vfs_object_create(vp, curproc, 2183 curproc ? curproc->p_ucred : NULL)); 2184} 2185 2186/* 2187 * Sort the group list in increasing numerical order. 2188 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2189 * that used to be here.) 2190 */ 2191void 2192nfsrvw_sort(list, num) 2193 register gid_t *list; 2194 register int num; 2195{ 2196 register int i, j; 2197 gid_t v; 2198 2199 /* Insertion sort. */ 2200 for (i = 1; i < num; i++) { 2201 v = list[i]; 2202 /* find correct slot for value v, moving others up */ 2203 for (j = i; --j >= 0 && v < list[j];) 2204 list[j + 1] = list[j]; 2205 list[j + 1] = v; 2206 } 2207} 2208 2209/* 2210 * copy credentials making sure that the result can be compared with bcmp(). 2211 */ 2212void 2213nfsrv_setcred(incred, outcred) 2214 register struct ucred *incred, *outcred; 2215{ 2216 register int i; 2217 2218 bzero((caddr_t)outcred, sizeof (struct ucred)); 2219 outcred->cr_ref = 1; 2220 outcred->cr_uid = incred->cr_uid; 2221 outcred->cr_ngroups = incred->cr_ngroups; 2222 for (i = 0; i < incred->cr_ngroups; i++) 2223 outcred->cr_groups[i] = incred->cr_groups[i]; 2224 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2225} 2226#endif /* NFS_NOSERVER */ 2227