nfs_srvsubs.c revision 50405
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 1.80 1999/08/08 18:42:55 phk Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/buf.h> 49#include <sys/proc.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#include <sys/conf.h> 60 61#include <vm/vm.h> 62#include <vm/vm_object.h> 63#include <vm/vm_extern.h> 64#include <vm/vm_zone.h> 65 66#include <nfs/rpcv2.h> 67#include <nfs/nfsproto.h> 68#include <nfs/nfs.h> 69#include <nfs/nfsnode.h> 70#include <nfs/xdr_subs.h> 71#include <nfs/nfsm_subs.h> 72#include <nfs/nfsmount.h> 73#include <nfs/nqnfs.h> 74#include <nfs/nfsrtt.h> 75 76#include <netinet/in.h> 77#ifdef ISO 78#include <netiso/iso.h> 79#endif 80 81/* 82 * Data items converted to xdr at startup, since they are constant 83 * This is kinda hokey, but may save a little time doing byte swaps 84 */ 85u_int32_t nfs_xdrneg1; 86u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 87 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 88 rpc_auth_kerb; 89u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 90 91/* And other global data */ 92static u_int32_t nfs_xid = 0; 93static enum vtype nv2tov_type[8]= { 94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 95}; 96enum vtype nv3tov_type[8]= { 97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 98}; 99 100int nfs_ticks; 101int nfs_pbuf_freecnt = -1; /* start out unlimited */ 102 103struct nfs_reqq nfs_reqq; 104struct nfssvc_sockhead nfssvc_sockhead; 105int nfssvc_sockhead_flag; 106struct nfsd_head nfsd_head; 107int nfsd_head_flag; 108struct nfs_bufq nfs_bufq; 109struct nqtimerhead nqtimerhead; 110struct nqfhhashhead *nqfhhashtbl; 111u_long nqfhhash; 112 113static void (*nfs_prev_lease_updatetime) __P((int)); 114static int nfs_prev_nfssvc_sy_narg; 115static sy_call_t *nfs_prev_nfssvc_sy_call; 116 117#ifndef NFS_NOSERVER 118 119static vop_t *nfs_prev_vop_lease_check; 120static int nfs_prev_getfh_sy_narg; 121static sy_call_t *nfs_prev_getfh_sy_call; 122 123/* 124 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 125 */ 126int nfsv3_procid[NFS_NPROCS] = { 127 NFSPROC_NULL, 128 NFSPROC_GETATTR, 129 NFSPROC_SETATTR, 130 NFSPROC_NOOP, 131 NFSPROC_LOOKUP, 132 NFSPROC_READLINK, 133 NFSPROC_READ, 134 NFSPROC_NOOP, 135 NFSPROC_WRITE, 136 NFSPROC_CREATE, 137 NFSPROC_REMOVE, 138 NFSPROC_RENAME, 139 NFSPROC_LINK, 140 NFSPROC_SYMLINK, 141 NFSPROC_MKDIR, 142 NFSPROC_RMDIR, 143 NFSPROC_READDIR, 144 NFSPROC_FSSTAT, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP, 152 NFSPROC_NOOP 153}; 154 155#endif /* NFS_NOSERVER */ 156/* 157 * and the reverse mapping from generic to Version 2 procedure numbers 158 */ 159int nfsv2_procid[NFS_NPROCS] = { 160 NFSV2PROC_NULL, 161 NFSV2PROC_GETATTR, 162 NFSV2PROC_SETATTR, 163 NFSV2PROC_LOOKUP, 164 NFSV2PROC_NOOP, 165 NFSV2PROC_READLINK, 166 NFSV2PROC_READ, 167 NFSV2PROC_WRITE, 168 NFSV2PROC_CREATE, 169 NFSV2PROC_MKDIR, 170 NFSV2PROC_SYMLINK, 171 NFSV2PROC_CREATE, 172 NFSV2PROC_REMOVE, 173 NFSV2PROC_RMDIR, 174 NFSV2PROC_RENAME, 175 NFSV2PROC_LINK, 176 NFSV2PROC_READDIR, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_STATFS, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 NFSV2PROC_NOOP, 186}; 187 188#ifndef NFS_NOSERVER 189/* 190 * Maps errno values to nfs error numbers. 191 * Use NFSERR_IO as the catch all for ones not specifically defined in 192 * RFC 1094. 193 */ 194static u_char nfsrv_v2errmap[ELAST] = { 195 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 199 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 208 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 212 NFSERR_IO /* << Last is 86 */ 213}; 214 215/* 216 * Maps errno values to nfs error numbers. 217 * Although it is not obvious whether or not NFS clients really care if 218 * a returned error value is in the specified list for the procedure, the 219 * safest thing to do is filter them appropriately. For Version 2, the 220 * X/Open XNFS document is the only specification that defines error values 221 * for each RPC (The RFC simply lists all possible error values for all RPCs), 222 * so I have decided to not do this for Version 2. 223 * The first entry is the default error return and the rest are the valid 224 * errors for that RPC in increasing numeric order. 225 */ 226static short nfsv3err_null[] = { 227 0, 228 0, 229}; 230 231static short nfsv3err_getattr[] = { 232 NFSERR_IO, 233 NFSERR_IO, 234 NFSERR_STALE, 235 NFSERR_BADHANDLE, 236 NFSERR_SERVERFAULT, 237 0, 238}; 239 240static short nfsv3err_setattr[] = { 241 NFSERR_IO, 242 NFSERR_PERM, 243 NFSERR_IO, 244 NFSERR_ACCES, 245 NFSERR_INVAL, 246 NFSERR_NOSPC, 247 NFSERR_ROFS, 248 NFSERR_DQUOT, 249 NFSERR_STALE, 250 NFSERR_BADHANDLE, 251 NFSERR_NOT_SYNC, 252 NFSERR_SERVERFAULT, 253 0, 254}; 255 256static short nfsv3err_lookup[] = { 257 NFSERR_IO, 258 NFSERR_NOENT, 259 NFSERR_IO, 260 NFSERR_ACCES, 261 NFSERR_NOTDIR, 262 NFSERR_NAMETOL, 263 NFSERR_STALE, 264 NFSERR_BADHANDLE, 265 NFSERR_SERVERFAULT, 266 0, 267}; 268 269static short nfsv3err_access[] = { 270 NFSERR_IO, 271 NFSERR_IO, 272 NFSERR_STALE, 273 NFSERR_BADHANDLE, 274 NFSERR_SERVERFAULT, 275 0, 276}; 277 278static short nfsv3err_readlink[] = { 279 NFSERR_IO, 280 NFSERR_IO, 281 NFSERR_ACCES, 282 NFSERR_INVAL, 283 NFSERR_STALE, 284 NFSERR_BADHANDLE, 285 NFSERR_NOTSUPP, 286 NFSERR_SERVERFAULT, 287 0, 288}; 289 290static short nfsv3err_read[] = { 291 NFSERR_IO, 292 NFSERR_IO, 293 NFSERR_NXIO, 294 NFSERR_ACCES, 295 NFSERR_INVAL, 296 NFSERR_STALE, 297 NFSERR_BADHANDLE, 298 NFSERR_SERVERFAULT, 299 0, 300}; 301 302static short nfsv3err_write[] = { 303 NFSERR_IO, 304 NFSERR_IO, 305 NFSERR_ACCES, 306 NFSERR_INVAL, 307 NFSERR_FBIG, 308 NFSERR_NOSPC, 309 NFSERR_ROFS, 310 NFSERR_DQUOT, 311 NFSERR_STALE, 312 NFSERR_BADHANDLE, 313 NFSERR_SERVERFAULT, 314 0, 315}; 316 317static short nfsv3err_create[] = { 318 NFSERR_IO, 319 NFSERR_IO, 320 NFSERR_ACCES, 321 NFSERR_EXIST, 322 NFSERR_NOTDIR, 323 NFSERR_NOSPC, 324 NFSERR_ROFS, 325 NFSERR_NAMETOL, 326 NFSERR_DQUOT, 327 NFSERR_STALE, 328 NFSERR_BADHANDLE, 329 NFSERR_NOTSUPP, 330 NFSERR_SERVERFAULT, 331 0, 332}; 333 334static short nfsv3err_mkdir[] = { 335 NFSERR_IO, 336 NFSERR_IO, 337 NFSERR_ACCES, 338 NFSERR_EXIST, 339 NFSERR_NOTDIR, 340 NFSERR_NOSPC, 341 NFSERR_ROFS, 342 NFSERR_NAMETOL, 343 NFSERR_DQUOT, 344 NFSERR_STALE, 345 NFSERR_BADHANDLE, 346 NFSERR_NOTSUPP, 347 NFSERR_SERVERFAULT, 348 0, 349}; 350 351static short nfsv3err_symlink[] = { 352 NFSERR_IO, 353 NFSERR_IO, 354 NFSERR_ACCES, 355 NFSERR_EXIST, 356 NFSERR_NOTDIR, 357 NFSERR_NOSPC, 358 NFSERR_ROFS, 359 NFSERR_NAMETOL, 360 NFSERR_DQUOT, 361 NFSERR_STALE, 362 NFSERR_BADHANDLE, 363 NFSERR_NOTSUPP, 364 NFSERR_SERVERFAULT, 365 0, 366}; 367 368static short nfsv3err_mknod[] = { 369 NFSERR_IO, 370 NFSERR_IO, 371 NFSERR_ACCES, 372 NFSERR_EXIST, 373 NFSERR_NOTDIR, 374 NFSERR_NOSPC, 375 NFSERR_ROFS, 376 NFSERR_NAMETOL, 377 NFSERR_DQUOT, 378 NFSERR_STALE, 379 NFSERR_BADHANDLE, 380 NFSERR_NOTSUPP, 381 NFSERR_SERVERFAULT, 382 NFSERR_BADTYPE, 383 0, 384}; 385 386static short nfsv3err_remove[] = { 387 NFSERR_IO, 388 NFSERR_NOENT, 389 NFSERR_IO, 390 NFSERR_ACCES, 391 NFSERR_NOTDIR, 392 NFSERR_ROFS, 393 NFSERR_NAMETOL, 394 NFSERR_STALE, 395 NFSERR_BADHANDLE, 396 NFSERR_SERVERFAULT, 397 0, 398}; 399 400static short nfsv3err_rmdir[] = { 401 NFSERR_IO, 402 NFSERR_NOENT, 403 NFSERR_IO, 404 NFSERR_ACCES, 405 NFSERR_EXIST, 406 NFSERR_NOTDIR, 407 NFSERR_INVAL, 408 NFSERR_ROFS, 409 NFSERR_NAMETOL, 410 NFSERR_NOTEMPTY, 411 NFSERR_STALE, 412 NFSERR_BADHANDLE, 413 NFSERR_NOTSUPP, 414 NFSERR_SERVERFAULT, 415 0, 416}; 417 418static short nfsv3err_rename[] = { 419 NFSERR_IO, 420 NFSERR_NOENT, 421 NFSERR_IO, 422 NFSERR_ACCES, 423 NFSERR_EXIST, 424 NFSERR_XDEV, 425 NFSERR_NOTDIR, 426 NFSERR_ISDIR, 427 NFSERR_INVAL, 428 NFSERR_NOSPC, 429 NFSERR_ROFS, 430 NFSERR_MLINK, 431 NFSERR_NAMETOL, 432 NFSERR_NOTEMPTY, 433 NFSERR_DQUOT, 434 NFSERR_STALE, 435 NFSERR_BADHANDLE, 436 NFSERR_NOTSUPP, 437 NFSERR_SERVERFAULT, 438 0, 439}; 440 441static short nfsv3err_link[] = { 442 NFSERR_IO, 443 NFSERR_IO, 444 NFSERR_ACCES, 445 NFSERR_EXIST, 446 NFSERR_XDEV, 447 NFSERR_NOTDIR, 448 NFSERR_INVAL, 449 NFSERR_NOSPC, 450 NFSERR_ROFS, 451 NFSERR_MLINK, 452 NFSERR_NAMETOL, 453 NFSERR_DQUOT, 454 NFSERR_STALE, 455 NFSERR_BADHANDLE, 456 NFSERR_NOTSUPP, 457 NFSERR_SERVERFAULT, 458 0, 459}; 460 461static short nfsv3err_readdir[] = { 462 NFSERR_IO, 463 NFSERR_IO, 464 NFSERR_ACCES, 465 NFSERR_NOTDIR, 466 NFSERR_STALE, 467 NFSERR_BADHANDLE, 468 NFSERR_BAD_COOKIE, 469 NFSERR_TOOSMALL, 470 NFSERR_SERVERFAULT, 471 0, 472}; 473 474static short nfsv3err_readdirplus[] = { 475 NFSERR_IO, 476 NFSERR_IO, 477 NFSERR_ACCES, 478 NFSERR_NOTDIR, 479 NFSERR_STALE, 480 NFSERR_BADHANDLE, 481 NFSERR_BAD_COOKIE, 482 NFSERR_NOTSUPP, 483 NFSERR_TOOSMALL, 484 NFSERR_SERVERFAULT, 485 0, 486}; 487 488static short nfsv3err_fsstat[] = { 489 NFSERR_IO, 490 NFSERR_IO, 491 NFSERR_STALE, 492 NFSERR_BADHANDLE, 493 NFSERR_SERVERFAULT, 494 0, 495}; 496 497static short nfsv3err_fsinfo[] = { 498 NFSERR_STALE, 499 NFSERR_STALE, 500 NFSERR_BADHANDLE, 501 NFSERR_SERVERFAULT, 502 0, 503}; 504 505static short nfsv3err_pathconf[] = { 506 NFSERR_STALE, 507 NFSERR_STALE, 508 NFSERR_BADHANDLE, 509 NFSERR_SERVERFAULT, 510 0, 511}; 512 513static short nfsv3err_commit[] = { 514 NFSERR_IO, 515 NFSERR_IO, 516 NFSERR_STALE, 517 NFSERR_BADHANDLE, 518 NFSERR_SERVERFAULT, 519 0, 520}; 521 522static short *nfsrv_v3errmap[] = { 523 nfsv3err_null, 524 nfsv3err_getattr, 525 nfsv3err_setattr, 526 nfsv3err_lookup, 527 nfsv3err_access, 528 nfsv3err_readlink, 529 nfsv3err_read, 530 nfsv3err_write, 531 nfsv3err_create, 532 nfsv3err_mkdir, 533 nfsv3err_symlink, 534 nfsv3err_mknod, 535 nfsv3err_remove, 536 nfsv3err_rmdir, 537 nfsv3err_rename, 538 nfsv3err_link, 539 nfsv3err_readdir, 540 nfsv3err_readdirplus, 541 nfsv3err_fsstat, 542 nfsv3err_fsinfo, 543 nfsv3err_pathconf, 544 nfsv3err_commit, 545}; 546 547#endif /* NFS_NOSERVER */ 548 549extern struct nfsrtt nfsrtt; 550extern time_t nqnfsstarttime; 551extern int nqsrv_clockskew; 552extern int nqsrv_writeslack; 553extern int nqsrv_maxlease; 554extern struct nfsstats nfsstats; 555extern int nqnfs_piggy[NFS_NPROCS]; 556extern nfstype nfsv2_type[9]; 557extern nfstype nfsv3_type[9]; 558extern struct nfsnodehashhead *nfsnodehashtbl; 559extern u_long nfsnodehash; 560 561struct getfh_args; 562extern int getfh(struct proc *, struct getfh_args *, int *); 563struct nfssvc_args; 564extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 565 566LIST_HEAD(nfsnodehashhead, nfsnode); 567 568int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 569 570u_quad_t 571nfs_curusec() 572{ 573 struct timeval tv; 574 575 getmicrotime(&tv); 576 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 577} 578 579/* 580 * Create the header for an rpc request packet 581 * The hsiz is the size of the rest of the nfs request header. 582 * (just used to decide if a cluster is a good idea) 583 */ 584struct mbuf * 585nfsm_reqh(vp, procid, hsiz, bposp) 586 struct vnode *vp; 587 u_long procid; 588 int hsiz; 589 caddr_t *bposp; 590{ 591 register struct mbuf *mb; 592 register u_int32_t *tl; 593 register caddr_t bpos; 594 struct mbuf *mb2; 595 struct nfsmount *nmp; 596 int nqflag; 597 598 MGET(mb, M_WAIT, MT_DATA); 599 if (hsiz >= MINCLSIZE) 600 MCLGET(mb, M_WAIT); 601 mb->m_len = 0; 602 bpos = mtod(mb, caddr_t); 603 604 /* 605 * For NQNFS, add lease request. 606 */ 607 if (vp) { 608 nmp = VFSTONFS(vp->v_mount); 609 if (nmp->nm_flag & NFSMNT_NQNFS) { 610 nqflag = NQNFS_NEEDLEASE(vp, procid); 611 if (nqflag) { 612 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 613 *tl++ = txdr_unsigned(nqflag); 614 *tl = txdr_unsigned(nmp->nm_leaseterm); 615 } else { 616 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 617 *tl = 0; 618 } 619 } 620 } 621 /* Finally, return values */ 622 *bposp = bpos; 623 return (mb); 624} 625 626/* 627 * Build the RPC header and fill in the authorization info. 628 * The authorization string argument is only used when the credentials 629 * come from outside of the kernel. 630 * Returns the head of the mbuf list. 631 */ 632struct mbuf * 633nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 634 verf_str, mrest, mrest_len, mbp, xidp) 635 register struct ucred *cr; 636 int nmflag; 637 int procid; 638 int auth_type; 639 int auth_len; 640 char *auth_str; 641 int verf_len; 642 char *verf_str; 643 struct mbuf *mrest; 644 int mrest_len; 645 struct mbuf **mbp; 646 u_int32_t *xidp; 647{ 648 register struct mbuf *mb; 649 register u_int32_t *tl; 650 register caddr_t bpos; 651 register int i; 652 struct mbuf *mreq, *mb2; 653 int siz, grpsiz, authsiz; 654 655 authsiz = nfsm_rndup(auth_len); 656 MGETHDR(mb, M_WAIT, MT_DATA); 657 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 658 MCLGET(mb, M_WAIT); 659 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 660 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 661 } else { 662 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 663 } 664 mb->m_len = 0; 665 mreq = mb; 666 bpos = mtod(mb, caddr_t); 667 668 /* 669 * First the RPC header. 670 */ 671 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 672 673 /* Get a pretty random xid to start with */ 674 if (!nfs_xid) 675 nfs_xid = random(); 676 /* 677 * Skip zero xid if it should ever happen. 678 */ 679 if (++nfs_xid == 0) 680 nfs_xid++; 681 682 *tl++ = *xidp = txdr_unsigned(nfs_xid); 683 *tl++ = rpc_call; 684 *tl++ = rpc_vers; 685 if (nmflag & NFSMNT_NQNFS) { 686 *tl++ = txdr_unsigned(NQNFS_PROG); 687 *tl++ = txdr_unsigned(NQNFS_VER3); 688 } else { 689 *tl++ = txdr_unsigned(NFS_PROG); 690 if (nmflag & NFSMNT_NFSV3) 691 *tl++ = txdr_unsigned(NFS_VER3); 692 else 693 *tl++ = txdr_unsigned(NFS_VER2); 694 } 695 if (nmflag & NFSMNT_NFSV3) 696 *tl++ = txdr_unsigned(procid); 697 else 698 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 699 700 /* 701 * And then the authorization cred. 702 */ 703 *tl++ = txdr_unsigned(auth_type); 704 *tl = txdr_unsigned(authsiz); 705 switch (auth_type) { 706 case RPCAUTH_UNIX: 707 nfsm_build(tl, u_int32_t *, auth_len); 708 *tl++ = 0; /* stamp ?? */ 709 *tl++ = 0; /* NULL hostname */ 710 *tl++ = txdr_unsigned(cr->cr_uid); 711 *tl++ = txdr_unsigned(cr->cr_groups[0]); 712 grpsiz = (auth_len >> 2) - 5; 713 *tl++ = txdr_unsigned(grpsiz); 714 for (i = 1; i <= grpsiz; i++) 715 *tl++ = txdr_unsigned(cr->cr_groups[i]); 716 break; 717 case RPCAUTH_KERB4: 718 siz = auth_len; 719 while (siz > 0) { 720 if (M_TRAILINGSPACE(mb) == 0) { 721 MGET(mb2, M_WAIT, MT_DATA); 722 if (siz >= MINCLSIZE) 723 MCLGET(mb2, M_WAIT); 724 mb->m_next = mb2; 725 mb = mb2; 726 mb->m_len = 0; 727 bpos = mtod(mb, caddr_t); 728 } 729 i = min(siz, M_TRAILINGSPACE(mb)); 730 bcopy(auth_str, bpos, i); 731 mb->m_len += i; 732 auth_str += i; 733 bpos += i; 734 siz -= i; 735 } 736 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 737 for (i = 0; i < siz; i++) 738 *bpos++ = '\0'; 739 mb->m_len += siz; 740 } 741 break; 742 }; 743 744 /* 745 * And the verifier... 746 */ 747 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 748 if (verf_str) { 749 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 750 *tl = txdr_unsigned(verf_len); 751 siz = verf_len; 752 while (siz > 0) { 753 if (M_TRAILINGSPACE(mb) == 0) { 754 MGET(mb2, M_WAIT, MT_DATA); 755 if (siz >= MINCLSIZE) 756 MCLGET(mb2, M_WAIT); 757 mb->m_next = mb2; 758 mb = mb2; 759 mb->m_len = 0; 760 bpos = mtod(mb, caddr_t); 761 } 762 i = min(siz, M_TRAILINGSPACE(mb)); 763 bcopy(verf_str, bpos, i); 764 mb->m_len += i; 765 verf_str += i; 766 bpos += i; 767 siz -= i; 768 } 769 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 770 for (i = 0; i < siz; i++) 771 *bpos++ = '\0'; 772 mb->m_len += siz; 773 } 774 } else { 775 *tl++ = txdr_unsigned(RPCAUTH_NULL); 776 *tl = 0; 777 } 778 mb->m_next = mrest; 779 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 780 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 781 *mbp = mb; 782 return (mreq); 783} 784 785/* 786 * copies mbuf chain to the uio scatter/gather list 787 */ 788int 789nfsm_mbuftouio(mrep, uiop, siz, dpos) 790 struct mbuf **mrep; 791 register struct uio *uiop; 792 int siz; 793 caddr_t *dpos; 794{ 795 register char *mbufcp, *uiocp; 796 register int xfer, left, len; 797 register struct mbuf *mp; 798 long uiosiz, rem; 799 int error = 0; 800 801 mp = *mrep; 802 mbufcp = *dpos; 803 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 804 rem = nfsm_rndup(siz)-siz; 805 while (siz > 0) { 806 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 807 return (EFBIG); 808 left = uiop->uio_iov->iov_len; 809 uiocp = uiop->uio_iov->iov_base; 810 if (left > siz) 811 left = siz; 812 uiosiz = left; 813 while (left > 0) { 814 while (len == 0) { 815 mp = mp->m_next; 816 if (mp == NULL) 817 return (EBADRPC); 818 mbufcp = mtod(mp, caddr_t); 819 len = mp->m_len; 820 } 821 xfer = (left > len) ? len : left; 822#ifdef notdef 823 /* Not Yet.. */ 824 if (uiop->uio_iov->iov_op != NULL) 825 (*(uiop->uio_iov->iov_op)) 826 (mbufcp, uiocp, xfer); 827 else 828#endif 829 if (uiop->uio_segflg == UIO_SYSSPACE) 830 bcopy(mbufcp, uiocp, xfer); 831 else 832 copyout(mbufcp, uiocp, xfer); 833 left -= xfer; 834 len -= xfer; 835 mbufcp += xfer; 836 uiocp += xfer; 837 uiop->uio_offset += xfer; 838 uiop->uio_resid -= xfer; 839 } 840 if (uiop->uio_iov->iov_len <= siz) { 841 uiop->uio_iovcnt--; 842 uiop->uio_iov++; 843 } else { 844 uiop->uio_iov->iov_base += uiosiz; 845 uiop->uio_iov->iov_len -= uiosiz; 846 } 847 siz -= uiosiz; 848 } 849 *dpos = mbufcp; 850 *mrep = mp; 851 if (rem > 0) { 852 if (len < rem) 853 error = nfs_adv(mrep, dpos, rem, len); 854 else 855 *dpos += rem; 856 } 857 return (error); 858} 859 860/* 861 * copies a uio scatter/gather list to an mbuf chain. 862 * NOTE: can ony handle iovcnt == 1 863 */ 864int 865nfsm_uiotombuf(uiop, mq, siz, bpos) 866 register struct uio *uiop; 867 struct mbuf **mq; 868 int siz; 869 caddr_t *bpos; 870{ 871 register char *uiocp; 872 register struct mbuf *mp, *mp2; 873 register int xfer, left, mlen; 874 int uiosiz, clflg, rem; 875 char *cp; 876 877#ifdef DIAGNOSTIC 878 if (uiop->uio_iovcnt != 1) 879 panic("nfsm_uiotombuf: iovcnt != 1"); 880#endif 881 882 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 883 clflg = 1; 884 else 885 clflg = 0; 886 rem = nfsm_rndup(siz)-siz; 887 mp = mp2 = *mq; 888 while (siz > 0) { 889 left = uiop->uio_iov->iov_len; 890 uiocp = uiop->uio_iov->iov_base; 891 if (left > siz) 892 left = siz; 893 uiosiz = left; 894 while (left > 0) { 895 mlen = M_TRAILINGSPACE(mp); 896 if (mlen == 0) { 897 MGET(mp, M_WAIT, MT_DATA); 898 if (clflg) 899 MCLGET(mp, M_WAIT); 900 mp->m_len = 0; 901 mp2->m_next = mp; 902 mp2 = mp; 903 mlen = M_TRAILINGSPACE(mp); 904 } 905 xfer = (left > mlen) ? mlen : left; 906#ifdef notdef 907 /* Not Yet.. */ 908 if (uiop->uio_iov->iov_op != NULL) 909 (*(uiop->uio_iov->iov_op)) 910 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 911 else 912#endif 913 if (uiop->uio_segflg == UIO_SYSSPACE) 914 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 915 else 916 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 917 mp->m_len += xfer; 918 left -= xfer; 919 uiocp += xfer; 920 uiop->uio_offset += xfer; 921 uiop->uio_resid -= xfer; 922 } 923 uiop->uio_iov->iov_base += uiosiz; 924 uiop->uio_iov->iov_len -= uiosiz; 925 siz -= uiosiz; 926 } 927 if (rem > 0) { 928 if (rem > M_TRAILINGSPACE(mp)) { 929 MGET(mp, M_WAIT, MT_DATA); 930 mp->m_len = 0; 931 mp2->m_next = mp; 932 } 933 cp = mtod(mp, caddr_t)+mp->m_len; 934 for (left = 0; left < rem; left++) 935 *cp++ = '\0'; 936 mp->m_len += rem; 937 *bpos = cp; 938 } else 939 *bpos = mtod(mp, caddr_t)+mp->m_len; 940 *mq = mp; 941 return (0); 942} 943 944/* 945 * Help break down an mbuf chain by setting the first siz bytes contiguous 946 * pointed to by returned val. 947 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 948 * cases. (The macros use the vars. dpos and dpos2) 949 */ 950int 951nfsm_disct(mdp, dposp, siz, left, cp2) 952 struct mbuf **mdp; 953 caddr_t *dposp; 954 int siz; 955 int left; 956 caddr_t *cp2; 957{ 958 register struct mbuf *mp, *mp2; 959 register int siz2, xfer; 960 register caddr_t p; 961 962 mp = *mdp; 963 while (left == 0) { 964 *mdp = mp = mp->m_next; 965 if (mp == NULL) 966 return (EBADRPC); 967 left = mp->m_len; 968 *dposp = mtod(mp, caddr_t); 969 } 970 if (left >= siz) { 971 *cp2 = *dposp; 972 *dposp += siz; 973 } else if (mp->m_next == NULL) { 974 return (EBADRPC); 975 } else if (siz > MHLEN) { 976 panic("nfs S too big"); 977 } else { 978 MGET(mp2, M_WAIT, MT_DATA); 979 mp2->m_next = mp->m_next; 980 mp->m_next = mp2; 981 mp->m_len -= left; 982 mp = mp2; 983 *cp2 = p = mtod(mp, caddr_t); 984 bcopy(*dposp, p, left); /* Copy what was left */ 985 siz2 = siz-left; 986 p += left; 987 mp2 = mp->m_next; 988 /* Loop around copying up the siz2 bytes */ 989 while (siz2 > 0) { 990 if (mp2 == NULL) 991 return (EBADRPC); 992 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 993 if (xfer > 0) { 994 bcopy(mtod(mp2, caddr_t), p, xfer); 995 NFSMADV(mp2, xfer); 996 mp2->m_len -= xfer; 997 p += xfer; 998 siz2 -= xfer; 999 } 1000 if (siz2 > 0) 1001 mp2 = mp2->m_next; 1002 } 1003 mp->m_len = siz; 1004 *mdp = mp2; 1005 *dposp = mtod(mp2, caddr_t); 1006 } 1007 return (0); 1008} 1009 1010/* 1011 * Advance the position in the mbuf chain. 1012 */ 1013int 1014nfs_adv(mdp, dposp, offs, left) 1015 struct mbuf **mdp; 1016 caddr_t *dposp; 1017 int offs; 1018 int left; 1019{ 1020 register struct mbuf *m; 1021 register int s; 1022 1023 m = *mdp; 1024 s = left; 1025 while (s < offs) { 1026 offs -= s; 1027 m = m->m_next; 1028 if (m == NULL) 1029 return (EBADRPC); 1030 s = m->m_len; 1031 } 1032 *mdp = m; 1033 *dposp = mtod(m, caddr_t)+offs; 1034 return (0); 1035} 1036 1037/* 1038 * Copy a string into mbufs for the hard cases... 1039 */ 1040int 1041nfsm_strtmbuf(mb, bpos, cp, siz) 1042 struct mbuf **mb; 1043 char **bpos; 1044 const char *cp; 1045 long siz; 1046{ 1047 register struct mbuf *m1 = NULL, *m2; 1048 long left, xfer, len, tlen; 1049 u_int32_t *tl; 1050 int putsize; 1051 1052 putsize = 1; 1053 m2 = *mb; 1054 left = M_TRAILINGSPACE(m2); 1055 if (left > 0) { 1056 tl = ((u_int32_t *)(*bpos)); 1057 *tl++ = txdr_unsigned(siz); 1058 putsize = 0; 1059 left -= NFSX_UNSIGNED; 1060 m2->m_len += NFSX_UNSIGNED; 1061 if (left > 0) { 1062 bcopy(cp, (caddr_t) tl, left); 1063 siz -= left; 1064 cp += left; 1065 m2->m_len += left; 1066 left = 0; 1067 } 1068 } 1069 /* Loop around adding mbufs */ 1070 while (siz > 0) { 1071 MGET(m1, M_WAIT, MT_DATA); 1072 if (siz > MLEN) 1073 MCLGET(m1, M_WAIT); 1074 m1->m_len = NFSMSIZ(m1); 1075 m2->m_next = m1; 1076 m2 = m1; 1077 tl = mtod(m1, u_int32_t *); 1078 tlen = 0; 1079 if (putsize) { 1080 *tl++ = txdr_unsigned(siz); 1081 m1->m_len -= NFSX_UNSIGNED; 1082 tlen = NFSX_UNSIGNED; 1083 putsize = 0; 1084 } 1085 if (siz < m1->m_len) { 1086 len = nfsm_rndup(siz); 1087 xfer = siz; 1088 if (xfer < len) 1089 *(tl+(xfer>>2)) = 0; 1090 } else { 1091 xfer = len = m1->m_len; 1092 } 1093 bcopy(cp, (caddr_t) tl, xfer); 1094 m1->m_len = len+tlen; 1095 siz -= xfer; 1096 cp += xfer; 1097 } 1098 *mb = m1; 1099 *bpos = mtod(m1, caddr_t)+m1->m_len; 1100 return (0); 1101} 1102 1103/* 1104 * Called once to initialize data structures... 1105 */ 1106int 1107nfs_init(vfsp) 1108 struct vfsconf *vfsp; 1109{ 1110 register int i; 1111 1112 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1113 1114 /* 1115 * Check to see if major data structures haven't bloated. 1116 */ 1117 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1118 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1119 printf("Try reducing NFS_UIDHASHSIZ\n"); 1120 } 1121 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1122 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1123 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1124 } 1125 nfs_mount_type = vfsp->vfc_typenum; 1126 nfsrtt.pos = 0; 1127 rpc_vers = txdr_unsigned(RPC_VER2); 1128 rpc_call = txdr_unsigned(RPC_CALL); 1129 rpc_reply = txdr_unsigned(RPC_REPLY); 1130 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1131 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1132 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1133 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1134 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1135 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1136 nfs_prog = txdr_unsigned(NFS_PROG); 1137 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1138 nfs_true = txdr_unsigned(TRUE); 1139 nfs_false = txdr_unsigned(FALSE); 1140 nfs_xdrneg1 = txdr_unsigned(-1); 1141 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1142 if (nfs_ticks < 1) 1143 nfs_ticks = 1; 1144 /* Ensure async daemons disabled */ 1145 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1146 nfs_iodwant[i] = (struct proc *)0; 1147 nfs_iodmount[i] = (struct nfsmount *)0; 1148 } 1149 nfs_nhinit(); /* Init the nfsnode table */ 1150#ifndef NFS_NOSERVER 1151 nfsrv_init(0); /* Init server data structures */ 1152 nfsrv_initcache(); /* Init the server request cache */ 1153#endif 1154 1155 /* 1156 * Initialize the nqnfs server stuff. 1157 */ 1158 if (nqnfsstarttime == 0) { 1159 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1160 + nqsrv_clockskew + nqsrv_writeslack; 1161 NQLOADNOVRAM(nqnfsstarttime); 1162 CIRCLEQ_INIT(&nqtimerhead); 1163 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1164 } 1165 1166 /* 1167 * Initialize reply list and start timer 1168 */ 1169 TAILQ_INIT(&nfs_reqq); 1170 1171 nfs_timer(0); 1172 1173 /* 1174 * Set up lease_check and lease_updatetime so that other parts 1175 * of the system can call us, if we are loadable. 1176 */ 1177#ifndef NFS_NOSERVER 1178 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1179 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1180#endif 1181 nfs_prev_lease_updatetime = lease_updatetime; 1182 lease_updatetime = nfs_lease_updatetime; 1183 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1184 sysent[SYS_nfssvc].sy_narg = 2; 1185 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1186 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1187#ifndef NFS_NOSERVER 1188 nfs_prev_getfh_sy_narg = sysent[SYS_getfh].sy_narg; 1189 sysent[SYS_getfh].sy_narg = 2; 1190 nfs_prev_getfh_sy_call = sysent[SYS_getfh].sy_call; 1191 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1192#endif 1193 1194 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1195 1196 return (0); 1197} 1198 1199int 1200nfs_uninit(vfsp) 1201 struct vfsconf *vfsp; 1202{ 1203 1204 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1205 nfs_mount_type = -1; 1206#ifndef NFS_NOSERVER 1207 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1208#endif 1209 lease_updatetime = nfs_prev_lease_updatetime; 1210 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1211 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1212#ifndef NFS_NOSERVER 1213 sysent[SYS_getfh].sy_narg = nfs_prev_getfh_sy_narg; 1214 sysent[SYS_getfh].sy_call = nfs_prev_getfh_sy_call; 1215#endif 1216 return (0); 1217} 1218 1219/* 1220 * Attribute cache routines. 1221 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1222 * that are on the mbuf list 1223 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1224 * error otherwise 1225 */ 1226 1227/* 1228 * Load the attribute cache (that lives in the nfsnode entry) with 1229 * the values on the mbuf list and 1230 * Iff vap not NULL 1231 * copy the attributes to *vaper 1232 */ 1233int 1234nfs_loadattrcache(vpp, mdp, dposp, vaper) 1235 struct vnode **vpp; 1236 struct mbuf **mdp; 1237 caddr_t *dposp; 1238 struct vattr *vaper; 1239{ 1240 register struct vnode *vp = *vpp; 1241 register struct vattr *vap; 1242 register struct nfs_fattr *fp; 1243 register struct nfsnode *np; 1244 register int32_t t1; 1245 caddr_t cp2; 1246 int error = 0, rdev; 1247 struct mbuf *md; 1248 enum vtype vtyp; 1249 u_short vmode; 1250 struct timespec mtime; 1251 struct vnode *nvp; 1252 int v3 = NFS_ISV3(vp); 1253 1254 md = *mdp; 1255 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1256 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1257 return (error); 1258 fp = (struct nfs_fattr *)cp2; 1259 if (v3) { 1260 vtyp = nfsv3tov_type(fp->fa_type); 1261 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1262 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1263 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1264 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1265 } else { 1266 vtyp = nfsv2tov_type(fp->fa_type); 1267 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1268 /* 1269 * XXX 1270 * 1271 * The duplicate information returned in fa_type and fa_mode 1272 * is an ambiguity in the NFS version 2 protocol. 1273 * 1274 * VREG should be taken literally as a regular file. If a 1275 * server intents to return some type information differently 1276 * in the upper bits of the mode field (e.g. for sockets, or 1277 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1278 * leave the examination of the mode bits even in the VREG 1279 * case to avoid breakage for bogus servers, but we make sure 1280 * that there are actually type bits set in the upper part of 1281 * fa_mode (and failing that, trust the va_type field). 1282 * 1283 * NFSv3 cleared the issue, and requires fa_mode to not 1284 * contain any type information (while also introduing sockets 1285 * and FIFOs for fa_type). 1286 */ 1287 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1288 vtyp = IFTOVT(vmode); 1289 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1290 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1291 1292 /* 1293 * Really ugly NFSv2 kludge. 1294 */ 1295 if (vtyp == VCHR && rdev == 0xffffffff) 1296 vtyp = VFIFO; 1297 } 1298 1299 /* 1300 * If v_type == VNON it is a new node, so fill in the v_type, 1301 * n_mtime fields. Check to see if it represents a special 1302 * device, and if so, check for a possible alias. Once the 1303 * correct vnode has been obtained, fill in the rest of the 1304 * information. 1305 */ 1306 np = VTONFS(vp); 1307 if (vp->v_type != vtyp) { 1308 vp->v_type = vtyp; 1309 if (vp->v_type == VFIFO) { 1310 vp->v_op = fifo_nfsv2nodeop_p; 1311 } 1312 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1313 vp->v_op = spec_nfsv2nodeop_p; 1314 addaliasu(vp, rdev); 1315 } 1316 np->n_mtime = mtime.tv_sec; 1317 } 1318 vap = &np->n_vattr; 1319 vap->va_type = vtyp; 1320 vap->va_mode = (vmode & 07777); 1321 vap->va_rdev = rdev; 1322 vap->va_mtime = mtime; 1323 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1324 if (v3) { 1325 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1326 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1327 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1328 vap->va_size = fxdr_hyper(&fp->fa3_size); 1329 vap->va_blocksize = NFS_FABLKSIZE; 1330 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1331 vap->va_fileid = fxdr_unsigned(int32_t, 1332 fp->fa3_fileid.nfsuquad[1]); 1333 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1334 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1335 vap->va_flags = 0; 1336 vap->va_filerev = 0; 1337 } else { 1338 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1339 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1340 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1341 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1342 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1343 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1344 * NFS_FABLKSIZE; 1345 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1346 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1347 vap->va_flags = 0; 1348 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1349 fp->fa2_ctime.nfsv2_sec); 1350 vap->va_ctime.tv_nsec = 0; 1351 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1352 vap->va_filerev = 0; 1353 } 1354 if (vap->va_size != np->n_size) { 1355 if (vap->va_type == VREG) { 1356 if (np->n_flag & NMODIFIED) { 1357 if (vap->va_size < np->n_size) 1358 vap->va_size = np->n_size; 1359 else 1360 np->n_size = vap->va_size; 1361 } else 1362 np->n_size = vap->va_size; 1363 vnode_pager_setsize(vp, np->n_size); 1364 } else 1365 np->n_size = vap->va_size; 1366 } 1367 np->n_attrstamp = time_second; 1368 if (vaper != NULL) { 1369 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1370 if (np->n_flag & NCHG) { 1371 if (np->n_flag & NACC) 1372 vaper->va_atime = np->n_atim; 1373 if (np->n_flag & NUPD) 1374 vaper->va_mtime = np->n_mtim; 1375 } 1376 } 1377 return (0); 1378} 1379 1380#ifdef NFS_ACDEBUG 1381#include <sys/sysctl.h> 1382SYSCTL_DECL(_vfs_nfs); 1383static int nfs_acdebug; 1384SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1385#endif 1386 1387/* 1388 * Check the time stamp 1389 * If the cache is valid, copy contents to *vap and return 0 1390 * otherwise return an error 1391 */ 1392int 1393nfs_getattrcache(vp, vaper) 1394 register struct vnode *vp; 1395 struct vattr *vaper; 1396{ 1397 register struct nfsnode *np; 1398 register struct vattr *vap; 1399 struct nfsmount *nmp; 1400 int timeo; 1401 1402 np = VTONFS(vp); 1403 vap = &np->n_vattr; 1404 nmp = VFSTONFS(vp->v_mount); 1405 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1406 timeo = (time_second - np->n_mtime) / 10; 1407 1408#ifdef NFS_ACDEBUG 1409 if (nfs_acdebug>1) 1410 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1411#endif 1412 1413 if (vap->va_type == VDIR) { 1414 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1415 timeo = nmp->nm_acdirmin; 1416 else if (timeo > nmp->nm_acdirmax) 1417 timeo = nmp->nm_acdirmax; 1418 } else { 1419 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1420 timeo = nmp->nm_acregmin; 1421 else if (timeo > nmp->nm_acregmax) 1422 timeo = nmp->nm_acregmax; 1423 } 1424 1425#ifdef NFS_ACDEBUG 1426 if (nfs_acdebug > 2) 1427 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1428 nmp->nm_acregmin, nmp->nm_acregmax, 1429 nmp->nm_acdirmin, nmp->nm_acdirmax); 1430 1431 if (nfs_acdebug) 1432 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1433 (time_second - np->n_attrstamp), timeo); 1434#endif 1435 1436 if ((time_second - np->n_attrstamp) >= timeo) { 1437 nfsstats.attrcache_misses++; 1438 return (ENOENT); 1439 } 1440 nfsstats.attrcache_hits++; 1441 if (vap->va_size != np->n_size) { 1442 if (vap->va_type == VREG) { 1443 if (np->n_flag & NMODIFIED) { 1444 if (vap->va_size < np->n_size) 1445 vap->va_size = np->n_size; 1446 else 1447 np->n_size = vap->va_size; 1448 } else 1449 np->n_size = vap->va_size; 1450 vnode_pager_setsize(vp, np->n_size); 1451 } else 1452 np->n_size = vap->va_size; 1453 } 1454 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1455 if (np->n_flag & NCHG) { 1456 if (np->n_flag & NACC) 1457 vaper->va_atime = np->n_atim; 1458 if (np->n_flag & NUPD) 1459 vaper->va_mtime = np->n_mtim; 1460 } 1461 return (0); 1462} 1463 1464#ifndef NFS_NOSERVER 1465/* 1466 * Set up nameidata for a lookup() call and do it. 1467 * 1468 * If pubflag is set, this call is done for a lookup operation on the 1469 * public filehandle. In that case we allow crossing mountpoints and 1470 * absolute pathnames. However, the caller is expected to check that 1471 * the lookup result is within the public fs, and deny access if 1472 * it is not. 1473 * 1474 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1475 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1476 * error occurs but the parent was not requested. 1477 * 1478 * dirp may be set whether an error is returned or not, and must be 1479 * released by the caller. 1480 */ 1481int 1482nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1483 register struct nameidata *ndp; 1484 fhandle_t *fhp; 1485 int len; 1486 struct nfssvc_sock *slp; 1487 struct sockaddr *nam; 1488 struct mbuf **mdp; 1489 caddr_t *dposp; 1490 struct vnode **retdirp; 1491 struct proc *p; 1492 int kerbflag, pubflag; 1493{ 1494 register int i, rem; 1495 register struct mbuf *md; 1496 register char *fromcp, *tocp, *cp; 1497 struct iovec aiov; 1498 struct uio auio; 1499 struct vnode *dp; 1500 int error, rdonly, linklen; 1501 struct componentname *cnp = &ndp->ni_cnd; 1502 1503 *retdirp = (struct vnode *)0; 1504 cnp->cn_pnbuf = zalloc(namei_zone); 1505 1506 /* 1507 * Copy the name from the mbuf list to ndp->ni_pnbuf 1508 * and set the various ndp fields appropriately. 1509 */ 1510 fromcp = *dposp; 1511 tocp = cnp->cn_pnbuf; 1512 md = *mdp; 1513 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1514 cnp->cn_hash = 0; 1515 for (i = 0; i < len; i++) { 1516 while (rem == 0) { 1517 md = md->m_next; 1518 if (md == NULL) { 1519 error = EBADRPC; 1520 goto out; 1521 } 1522 fromcp = mtod(md, caddr_t); 1523 rem = md->m_len; 1524 } 1525 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1526 error = EACCES; 1527 goto out; 1528 } 1529 cnp->cn_hash += (unsigned char)*fromcp; 1530 *tocp++ = *fromcp++; 1531 rem--; 1532 } 1533 *tocp = '\0'; 1534 *mdp = md; 1535 *dposp = fromcp; 1536 len = nfsm_rndup(len)-len; 1537 if (len > 0) { 1538 if (rem >= len) 1539 *dposp += len; 1540 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1541 goto out; 1542 } 1543 1544 /* 1545 * Extract and set starting directory. 1546 */ 1547 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1548 nam, &rdonly, kerbflag, pubflag); 1549 if (error) 1550 goto out; 1551 if (dp->v_type != VDIR) { 1552 vrele(dp); 1553 error = ENOTDIR; 1554 goto out; 1555 } 1556 1557 if (rdonly) 1558 cnp->cn_flags |= RDONLY; 1559 1560 /* 1561 * Set return directory. Reference to dp is implicitly transfered 1562 * to the returned pointer 1563 */ 1564 *retdirp = dp; 1565 1566 if (pubflag) { 1567 /* 1568 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1569 * and the 'native path' indicator. 1570 */ 1571 cp = zalloc(namei_zone); 1572 fromcp = cnp->cn_pnbuf; 1573 tocp = cp; 1574 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1575 switch ((unsigned char)*fromcp) { 1576 case WEBNFS_NATIVE_CHAR: 1577 /* 1578 * 'Native' path for us is the same 1579 * as a path according to the NFS spec, 1580 * just skip the escape char. 1581 */ 1582 fromcp++; 1583 break; 1584 /* 1585 * More may be added in the future, range 0x80-0xff 1586 */ 1587 default: 1588 error = EIO; 1589 zfree(namei_zone, cp); 1590 goto out; 1591 } 1592 } 1593 /* 1594 * Translate the '%' escapes, URL-style. 1595 */ 1596 while (*fromcp != '\0') { 1597 if (*fromcp == WEBNFS_ESC_CHAR) { 1598 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1599 fromcp++; 1600 *tocp++ = HEXSTRTOI(fromcp); 1601 fromcp += 2; 1602 continue; 1603 } else { 1604 error = ENOENT; 1605 zfree(namei_zone, cp); 1606 goto out; 1607 } 1608 } else 1609 *tocp++ = *fromcp++; 1610 } 1611 *tocp = '\0'; 1612 zfree(namei_zone, cnp->cn_pnbuf); 1613 cnp->cn_pnbuf = cp; 1614 } 1615 1616 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1617 ndp->ni_segflg = UIO_SYSSPACE; 1618 1619 if (pubflag) { 1620 ndp->ni_rootdir = rootvnode; 1621 ndp->ni_loopcnt = 0; 1622 if (cnp->cn_pnbuf[0] == '/') 1623 dp = rootvnode; 1624 } else { 1625 cnp->cn_flags |= NOCROSSMOUNT; 1626 } 1627 1628 /* 1629 * Initialize for scan, set ni_startdir and bump ref on dp again 1630 * becuase lookup() will dereference ni_startdir. 1631 */ 1632 1633 cnp->cn_proc = p; 1634 VREF(dp); 1635 ndp->ni_startdir = dp; 1636 1637 for (;;) { 1638 cnp->cn_nameptr = cnp->cn_pnbuf; 1639 /* 1640 * Call lookup() to do the real work. If an error occurs, 1641 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1642 * we do not have to dereference anything before returning. 1643 * In either case ni_startdir will be dereferenced and NULLed 1644 * out. 1645 */ 1646 error = lookup(ndp); 1647 if (error) 1648 break; 1649 1650 /* 1651 * Check for encountering a symbolic link. Trivial 1652 * termination occurs if no symlink encountered. 1653 * Note: zfree is safe because error is 0, so we will 1654 * not zfree it again when we break. 1655 */ 1656 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1657 nfsrv_object_create(ndp->ni_vp); 1658 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 1659 cnp->cn_flags |= HASBUF; 1660 else 1661 zfree(namei_zone, cnp->cn_pnbuf); 1662 break; 1663 } 1664 1665 /* 1666 * Validate symlink 1667 */ 1668 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1669 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1670 if (!pubflag) { 1671 error = EINVAL; 1672 goto badlink2; 1673 } 1674 1675 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1676 error = ELOOP; 1677 goto badlink2; 1678 } 1679 if (ndp->ni_pathlen > 1) 1680 cp = zalloc(namei_zone); 1681 else 1682 cp = cnp->cn_pnbuf; 1683 aiov.iov_base = cp; 1684 aiov.iov_len = MAXPATHLEN; 1685 auio.uio_iov = &aiov; 1686 auio.uio_iovcnt = 1; 1687 auio.uio_offset = 0; 1688 auio.uio_rw = UIO_READ; 1689 auio.uio_segflg = UIO_SYSSPACE; 1690 auio.uio_procp = (struct proc *)0; 1691 auio.uio_resid = MAXPATHLEN; 1692 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1693 if (error) { 1694 badlink1: 1695 if (ndp->ni_pathlen > 1) 1696 zfree(namei_zone, cp); 1697 badlink2: 1698 vrele(ndp->ni_dvp); 1699 vput(ndp->ni_vp); 1700 break; 1701 } 1702 linklen = MAXPATHLEN - auio.uio_resid; 1703 if (linklen == 0) { 1704 error = ENOENT; 1705 goto badlink1; 1706 } 1707 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1708 error = ENAMETOOLONG; 1709 goto badlink1; 1710 } 1711 1712 /* 1713 * Adjust or replace path 1714 */ 1715 if (ndp->ni_pathlen > 1) { 1716 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1717 zfree(namei_zone, cnp->cn_pnbuf); 1718 cnp->cn_pnbuf = cp; 1719 } else 1720 cnp->cn_pnbuf[linklen] = '\0'; 1721 ndp->ni_pathlen += linklen; 1722 1723 /* 1724 * Cleanup refs for next loop and check if root directory 1725 * should replace current directory. Normally ni_dvp 1726 * becomes the new base directory and is cleaned up when 1727 * we loop. Explicitly null pointers after invalidation 1728 * to clarify operation. 1729 */ 1730 vput(ndp->ni_vp); 1731 ndp->ni_vp = NULL; 1732 1733 if (cnp->cn_pnbuf[0] == '/') { 1734 vrele(ndp->ni_dvp); 1735 ndp->ni_dvp = ndp->ni_rootdir; 1736 VREF(ndp->ni_dvp); 1737 } 1738 ndp->ni_startdir = ndp->ni_dvp; 1739 ndp->ni_dvp = NULL; 1740 } 1741 1742 /* 1743 * nfs_namei() guarentees that fields will not contain garbage 1744 * whether an error occurs or not. This allows the caller to track 1745 * cleanup state trivially. 1746 */ 1747out: 1748 if (error) { 1749 zfree(namei_zone, cnp->cn_pnbuf); 1750 ndp->ni_vp = NULL; 1751 ndp->ni_dvp = NULL; 1752 ndp->ni_startdir = NULL; 1753 cnp->cn_flags &= ~HASBUF; 1754 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 1755 ndp->ni_dvp = NULL; 1756 } 1757 return (error); 1758} 1759 1760/* 1761 * A fiddled version of m_adj() that ensures null fill to a long 1762 * boundary and only trims off the back end 1763 */ 1764void 1765nfsm_adj(mp, len, nul) 1766 struct mbuf *mp; 1767 register int len; 1768 int nul; 1769{ 1770 register struct mbuf *m; 1771 register int count, i; 1772 register char *cp; 1773 1774 /* 1775 * Trim from tail. Scan the mbuf chain, 1776 * calculating its length and finding the last mbuf. 1777 * If the adjustment only affects this mbuf, then just 1778 * adjust and return. Otherwise, rescan and truncate 1779 * after the remaining size. 1780 */ 1781 count = 0; 1782 m = mp; 1783 for (;;) { 1784 count += m->m_len; 1785 if (m->m_next == (struct mbuf *)0) 1786 break; 1787 m = m->m_next; 1788 } 1789 if (m->m_len > len) { 1790 m->m_len -= len; 1791 if (nul > 0) { 1792 cp = mtod(m, caddr_t)+m->m_len-nul; 1793 for (i = 0; i < nul; i++) 1794 *cp++ = '\0'; 1795 } 1796 return; 1797 } 1798 count -= len; 1799 if (count < 0) 1800 count = 0; 1801 /* 1802 * Correct length for chain is "count". 1803 * Find the mbuf with last data, adjust its length, 1804 * and toss data from remaining mbufs on chain. 1805 */ 1806 for (m = mp; m; m = m->m_next) { 1807 if (m->m_len >= count) { 1808 m->m_len = count; 1809 if (nul > 0) { 1810 cp = mtod(m, caddr_t)+m->m_len-nul; 1811 for (i = 0; i < nul; i++) 1812 *cp++ = '\0'; 1813 } 1814 break; 1815 } 1816 count -= m->m_len; 1817 } 1818 for (m = m->m_next;m;m = m->m_next) 1819 m->m_len = 0; 1820} 1821 1822/* 1823 * Make these functions instead of macros, so that the kernel text size 1824 * doesn't get too big... 1825 */ 1826void 1827nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1828 struct nfsrv_descript *nfsd; 1829 int before_ret; 1830 register struct vattr *before_vap; 1831 int after_ret; 1832 struct vattr *after_vap; 1833 struct mbuf **mbp; 1834 char **bposp; 1835{ 1836 register struct mbuf *mb = *mbp, *mb2; 1837 register char *bpos = *bposp; 1838 register u_int32_t *tl; 1839 1840 if (before_ret) { 1841 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1842 *tl = nfs_false; 1843 } else { 1844 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1845 *tl++ = nfs_true; 1846 txdr_hyper(before_vap->va_size, tl); 1847 tl += 2; 1848 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1849 tl += 2; 1850 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1851 } 1852 *bposp = bpos; 1853 *mbp = mb; 1854 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1855} 1856 1857void 1858nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1859 struct nfsrv_descript *nfsd; 1860 int after_ret; 1861 struct vattr *after_vap; 1862 struct mbuf **mbp; 1863 char **bposp; 1864{ 1865 register struct mbuf *mb = *mbp, *mb2; 1866 register char *bpos = *bposp; 1867 register u_int32_t *tl; 1868 register struct nfs_fattr *fp; 1869 1870 if (after_ret) { 1871 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1872 *tl = nfs_false; 1873 } else { 1874 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1875 *tl++ = nfs_true; 1876 fp = (struct nfs_fattr *)tl; 1877 nfsm_srvfattr(nfsd, after_vap, fp); 1878 } 1879 *mbp = mb; 1880 *bposp = bpos; 1881} 1882 1883void 1884nfsm_srvfattr(nfsd, vap, fp) 1885 register struct nfsrv_descript *nfsd; 1886 register struct vattr *vap; 1887 register struct nfs_fattr *fp; 1888{ 1889 1890 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1891 fp->fa_uid = txdr_unsigned(vap->va_uid); 1892 fp->fa_gid = txdr_unsigned(vap->va_gid); 1893 if (nfsd->nd_flag & ND_NFSV3) { 1894 fp->fa_type = vtonfsv3_type(vap->va_type); 1895 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1896 txdr_hyper(vap->va_size, &fp->fa3_size); 1897 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1898 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1899 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1900 fp->fa3_fsid.nfsuquad[0] = 0; 1901 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1902 fp->fa3_fileid.nfsuquad[0] = 0; 1903 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1904 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1905 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1906 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1907 } else { 1908 fp->fa_type = vtonfsv2_type(vap->va_type); 1909 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1910 fp->fa2_size = txdr_unsigned(vap->va_size); 1911 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1912 if (vap->va_type == VFIFO) 1913 fp->fa2_rdev = 0xffffffff; 1914 else 1915 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1916 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1917 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1918 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1919 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1920 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1921 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1922 } 1923} 1924 1925/* 1926 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1927 * - look up fsid in mount list (if not found ret error) 1928 * - get vp and export rights by calling VFS_FHTOVP() 1929 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1930 * - if not lockflag unlock it with VOP_UNLOCK() 1931 */ 1932int 1933nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1934 fhandle_t *fhp; 1935 int lockflag; 1936 struct vnode **vpp; 1937 struct ucred *cred; 1938 struct nfssvc_sock *slp; 1939 struct sockaddr *nam; 1940 int *rdonlyp; 1941 int kerbflag; 1942 int pubflag; 1943{ 1944 struct proc *p = curproc; /* XXX */ 1945 register struct mount *mp; 1946 register int i; 1947 struct ucred *credanon; 1948 int error, exflags; 1949#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1950 struct sockaddr_int *saddr; 1951#endif 1952 1953 *vpp = (struct vnode *)0; 1954 1955 if (nfs_ispublicfh(fhp)) { 1956 if (!pubflag || !nfs_pub.np_valid) 1957 return (ESTALE); 1958 fhp = &nfs_pub.np_handle; 1959 } 1960 1961 mp = vfs_getvfs(&fhp->fh_fsid); 1962 if (!mp) 1963 return (ESTALE); 1964 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1965 if (error) 1966 return (error); 1967#ifdef MNT_EXNORESPORT 1968 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1969 saddr = (struct sockaddr_in *)nam; 1970 if (saddr->sin_family == AF_INET && 1971 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1972 vput(*vpp); 1973 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1974 } 1975 } 1976#endif 1977 /* 1978 * Check/setup credentials. 1979 */ 1980 if (exflags & MNT_EXKERB) { 1981 if (!kerbflag) { 1982 vput(*vpp); 1983 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1984 } 1985 } else if (kerbflag) { 1986 vput(*vpp); 1987 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1988 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1989 cred->cr_uid = credanon->cr_uid; 1990 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1991 cred->cr_groups[i] = credanon->cr_groups[i]; 1992 cred->cr_ngroups = i; 1993 } 1994 if (exflags & MNT_EXRDONLY) 1995 *rdonlyp = 1; 1996 else 1997 *rdonlyp = 0; 1998 1999 nfsrv_object_create(*vpp); 2000 2001 if (!lockflag) 2002 VOP_UNLOCK(*vpp, 0, p); 2003 return (0); 2004} 2005 2006 2007/* 2008 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2009 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2010 * transformed this to all zeroes in both cases, so check for it. 2011 */ 2012int 2013nfs_ispublicfh(fhp) 2014 fhandle_t *fhp; 2015{ 2016 char *cp = (char *)fhp; 2017 int i; 2018 2019 for (i = 0; i < NFSX_V3FH; i++) 2020 if (*cp++ != 0) 2021 return (FALSE); 2022 return (TRUE); 2023} 2024 2025#endif /* NFS_NOSERVER */ 2026/* 2027 * This function compares two net addresses by family and returns TRUE 2028 * if they are the same host. 2029 * If there is any doubt, return FALSE. 2030 * The AF_INET family is handled as a special case so that address mbufs 2031 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2032 */ 2033int 2034netaddr_match(family, haddr, nam) 2035 int family; 2036 union nethostaddr *haddr; 2037 struct sockaddr *nam; 2038{ 2039 register struct sockaddr_in *inetaddr; 2040 2041 switch (family) { 2042 case AF_INET: 2043 inetaddr = (struct sockaddr_in *)nam; 2044 if (inetaddr->sin_family == AF_INET && 2045 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2046 return (1); 2047 break; 2048#ifdef ISO 2049 case AF_ISO: 2050 { 2051 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2052 2053 isoaddr1 = (struct sockaddr_iso *)nam; 2054 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2055 if (isoaddr1->siso_family == AF_ISO && 2056 isoaddr1->siso_nlen > 0 && 2057 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2058 SAME_ISOADDR(isoaddr1, isoaddr2)) 2059 return (1); 2060 break; 2061 } 2062#endif /* ISO */ 2063 default: 2064 break; 2065 }; 2066 return (0); 2067} 2068 2069static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 2070/* 2071 * This function finds the directory cookie that corresponds to the 2072 * logical byte offset given. 2073 */ 2074nfsuint64 * 2075nfs_getcookie(np, off, add) 2076 register struct nfsnode *np; 2077 off_t off; 2078 int add; 2079{ 2080 register struct nfsdmap *dp, *dp2; 2081 register int pos; 2082 2083 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2084 if (pos == 0 || off < 0) { 2085#ifdef DIAGNOSTIC 2086 if (add) 2087 panic("nfs getcookie add at <= 0"); 2088#endif 2089 return (&nfs_nullcookie); 2090 } 2091 pos--; 2092 dp = np->n_cookies.lh_first; 2093 if (!dp) { 2094 if (add) { 2095 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2096 M_NFSDIROFF, M_WAITOK); 2097 dp->ndm_eocookie = 0; 2098 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2099 } else 2100 return ((nfsuint64 *)0); 2101 } 2102 while (pos >= NFSNUMCOOKIES) { 2103 pos -= NFSNUMCOOKIES; 2104 if (dp->ndm_list.le_next) { 2105 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2106 pos >= dp->ndm_eocookie) 2107 return ((nfsuint64 *)0); 2108 dp = dp->ndm_list.le_next; 2109 } else if (add) { 2110 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2111 M_NFSDIROFF, M_WAITOK); 2112 dp2->ndm_eocookie = 0; 2113 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2114 dp = dp2; 2115 } else 2116 return ((nfsuint64 *)0); 2117 } 2118 if (pos >= dp->ndm_eocookie) { 2119 if (add) 2120 dp->ndm_eocookie = pos + 1; 2121 else 2122 return ((nfsuint64 *)0); 2123 } 2124 return (&dp->ndm_cookies[pos]); 2125} 2126 2127/* 2128 * Invalidate cached directory information, except for the actual directory 2129 * blocks (which are invalidated separately). 2130 * Done mainly to avoid the use of stale offset cookies. 2131 */ 2132void 2133nfs_invaldir(vp) 2134 register struct vnode *vp; 2135{ 2136 register struct nfsnode *np = VTONFS(vp); 2137 2138#ifdef DIAGNOSTIC 2139 if (vp->v_type != VDIR) 2140 panic("nfs: invaldir not dir"); 2141#endif 2142 np->n_direofoffset = 0; 2143 np->n_cookieverf.nfsuquad[0] = 0; 2144 np->n_cookieverf.nfsuquad[1] = 0; 2145 if (np->n_cookies.lh_first) 2146 np->n_cookies.lh_first->ndm_eocookie = 0; 2147} 2148 2149/* 2150 * The write verifier has changed (probably due to a server reboot), so all 2151 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2152 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2153 * flag. Once done the new write verifier can be set for the mount point. 2154 */ 2155void 2156nfs_clearcommit(mp) 2157 struct mount *mp; 2158{ 2159 register struct vnode *vp, *nvp; 2160 register struct buf *bp, *nbp; 2161 int s; 2162 2163 s = splbio(); 2164loop: 2165 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2166 if (vp->v_mount != mp) /* Paranoia */ 2167 goto loop; 2168 nvp = vp->v_mntvnodes.le_next; 2169 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2170 nbp = TAILQ_NEXT(bp, b_vnbufs); 2171 if (BUF_REFCNT(bp) == 0 && 2172 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2173 == (B_DELWRI | B_NEEDCOMMIT)) 2174 bp->b_flags &= ~B_NEEDCOMMIT; 2175 } 2176 } 2177 splx(s); 2178} 2179 2180#ifndef NFS_NOSERVER 2181/* 2182 * Map errnos to NFS error numbers. For Version 3 also filter out error 2183 * numbers not specified for the associated procedure. 2184 */ 2185int 2186nfsrv_errmap(nd, err) 2187 struct nfsrv_descript *nd; 2188 register int err; 2189{ 2190 register short *defaulterrp, *errp; 2191 2192 if (nd->nd_flag & ND_NFSV3) { 2193 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2194 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2195 while (*++errp) { 2196 if (*errp == err) 2197 return (err); 2198 else if (*errp > err) 2199 break; 2200 } 2201 return ((int)*defaulterrp); 2202 } else 2203 return (err & 0xffff); 2204 } 2205 if (err <= ELAST) 2206 return ((int)nfsrv_v2errmap[err - 1]); 2207 return (NFSERR_IO); 2208} 2209 2210int 2211nfsrv_object_create(vp) 2212 struct vnode *vp; 2213{ 2214 2215 if (vp == NULL || vp->v_type != VREG) 2216 return (1); 2217 return (vfs_object_create(vp, curproc, 2218 curproc ? curproc->p_ucred : NULL)); 2219} 2220 2221/* 2222 * Sort the group list in increasing numerical order. 2223 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2224 * that used to be here.) 2225 */ 2226void 2227nfsrvw_sort(list, num) 2228 register gid_t *list; 2229 register int num; 2230{ 2231 register int i, j; 2232 gid_t v; 2233 2234 /* Insertion sort. */ 2235 for (i = 1; i < num; i++) { 2236 v = list[i]; 2237 /* find correct slot for value v, moving others up */ 2238 for (j = i; --j >= 0 && v < list[j];) 2239 list[j + 1] = list[j]; 2240 list[j + 1] = v; 2241 } 2242} 2243 2244/* 2245 * copy credentials making sure that the result can be compared with bcmp(). 2246 */ 2247void 2248nfsrv_setcred(incred, outcred) 2249 register struct ucred *incred, *outcred; 2250{ 2251 register int i; 2252 2253 bzero((caddr_t)outcred, sizeof (struct ucred)); 2254 outcred->cr_ref = 1; 2255 outcred->cr_uid = incred->cr_uid; 2256 outcred->cr_ngroups = incred->cr_ngroups; 2257 for (i = 0; i < incred->cr_ngroups; i++) 2258 outcred->cr_groups[i] = incred->cr_groups[i]; 2259 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2260} 2261#endif /* NFS_NOSERVER */ 2262