nfs_subs.c revision 54970
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 * $FreeBSD: head/sys/nfsclient/nfs_subs.c 54970 1999-12-21 20:21:12Z alfred $ 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; 120 121/* 122 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 123 */ 124int nfsv3_procid[NFS_NPROCS] = { 125 NFSPROC_NULL, 126 NFSPROC_GETATTR, 127 NFSPROC_SETATTR, 128 NFSPROC_NOOP, 129 NFSPROC_LOOKUP, 130 NFSPROC_READLINK, 131 NFSPROC_READ, 132 NFSPROC_NOOP, 133 NFSPROC_WRITE, 134 NFSPROC_CREATE, 135 NFSPROC_REMOVE, 136 NFSPROC_RENAME, 137 NFSPROC_LINK, 138 NFSPROC_SYMLINK, 139 NFSPROC_MKDIR, 140 NFSPROC_RMDIR, 141 NFSPROC_READDIR, 142 NFSPROC_FSSTAT, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP 151}; 152 153#endif /* NFS_NOSERVER */ 154/* 155 * and the reverse mapping from generic to Version 2 procedure numbers 156 */ 157int nfsv2_procid[NFS_NPROCS] = { 158 NFSV2PROC_NULL, 159 NFSV2PROC_GETATTR, 160 NFSV2PROC_SETATTR, 161 NFSV2PROC_LOOKUP, 162 NFSV2PROC_NOOP, 163 NFSV2PROC_READLINK, 164 NFSV2PROC_READ, 165 NFSV2PROC_WRITE, 166 NFSV2PROC_CREATE, 167 NFSV2PROC_MKDIR, 168 NFSV2PROC_SYMLINK, 169 NFSV2PROC_CREATE, 170 NFSV2PROC_REMOVE, 171 NFSV2PROC_RMDIR, 172 NFSV2PROC_RENAME, 173 NFSV2PROC_LINK, 174 NFSV2PROC_READDIR, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_STATFS, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_NOOP, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184}; 185 186#ifndef NFS_NOSERVER 187/* 188 * Maps errno values to nfs error numbers. 189 * Use NFSERR_IO as the catch all for ones not specifically defined in 190 * RFC 1094. 191 */ 192static u_char nfsrv_v2errmap[ELAST] = { 193 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 197 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 206 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 210 NFSERR_IO /* << Last is 86 */ 211}; 212 213/* 214 * Maps errno values to nfs error numbers. 215 * Although it is not obvious whether or not NFS clients really care if 216 * a returned error value is in the specified list for the procedure, the 217 * safest thing to do is filter them appropriately. For Version 2, the 218 * X/Open XNFS document is the only specification that defines error values 219 * for each RPC (The RFC simply lists all possible error values for all RPCs), 220 * so I have decided to not do this for Version 2. 221 * The first entry is the default error return and the rest are the valid 222 * errors for that RPC in increasing numeric order. 223 */ 224static short nfsv3err_null[] = { 225 0, 226 0, 227}; 228 229static short nfsv3err_getattr[] = { 230 NFSERR_IO, 231 NFSERR_IO, 232 NFSERR_STALE, 233 NFSERR_BADHANDLE, 234 NFSERR_SERVERFAULT, 235 0, 236}; 237 238static short nfsv3err_setattr[] = { 239 NFSERR_IO, 240 NFSERR_PERM, 241 NFSERR_IO, 242 NFSERR_ACCES, 243 NFSERR_INVAL, 244 NFSERR_NOSPC, 245 NFSERR_ROFS, 246 NFSERR_DQUOT, 247 NFSERR_STALE, 248 NFSERR_BADHANDLE, 249 NFSERR_NOT_SYNC, 250 NFSERR_SERVERFAULT, 251 0, 252}; 253 254static short nfsv3err_lookup[] = { 255 NFSERR_IO, 256 NFSERR_NOENT, 257 NFSERR_IO, 258 NFSERR_ACCES, 259 NFSERR_NOTDIR, 260 NFSERR_NAMETOL, 261 NFSERR_STALE, 262 NFSERR_BADHANDLE, 263 NFSERR_SERVERFAULT, 264 0, 265}; 266 267static short nfsv3err_access[] = { 268 NFSERR_IO, 269 NFSERR_IO, 270 NFSERR_STALE, 271 NFSERR_BADHANDLE, 272 NFSERR_SERVERFAULT, 273 0, 274}; 275 276static short nfsv3err_readlink[] = { 277 NFSERR_IO, 278 NFSERR_IO, 279 NFSERR_ACCES, 280 NFSERR_INVAL, 281 NFSERR_STALE, 282 NFSERR_BADHANDLE, 283 NFSERR_NOTSUPP, 284 NFSERR_SERVERFAULT, 285 0, 286}; 287 288static short nfsv3err_read[] = { 289 NFSERR_IO, 290 NFSERR_IO, 291 NFSERR_NXIO, 292 NFSERR_ACCES, 293 NFSERR_INVAL, 294 NFSERR_STALE, 295 NFSERR_BADHANDLE, 296 NFSERR_SERVERFAULT, 297 0, 298}; 299 300static short nfsv3err_write[] = { 301 NFSERR_IO, 302 NFSERR_IO, 303 NFSERR_ACCES, 304 NFSERR_INVAL, 305 NFSERR_FBIG, 306 NFSERR_NOSPC, 307 NFSERR_ROFS, 308 NFSERR_DQUOT, 309 NFSERR_STALE, 310 NFSERR_BADHANDLE, 311 NFSERR_SERVERFAULT, 312 0, 313}; 314 315static short nfsv3err_create[] = { 316 NFSERR_IO, 317 NFSERR_IO, 318 NFSERR_ACCES, 319 NFSERR_EXIST, 320 NFSERR_NOTDIR, 321 NFSERR_NOSPC, 322 NFSERR_ROFS, 323 NFSERR_NAMETOL, 324 NFSERR_DQUOT, 325 NFSERR_STALE, 326 NFSERR_BADHANDLE, 327 NFSERR_NOTSUPP, 328 NFSERR_SERVERFAULT, 329 0, 330}; 331 332static short nfsv3err_mkdir[] = { 333 NFSERR_IO, 334 NFSERR_IO, 335 NFSERR_ACCES, 336 NFSERR_EXIST, 337 NFSERR_NOTDIR, 338 NFSERR_NOSPC, 339 NFSERR_ROFS, 340 NFSERR_NAMETOL, 341 NFSERR_DQUOT, 342 NFSERR_STALE, 343 NFSERR_BADHANDLE, 344 NFSERR_NOTSUPP, 345 NFSERR_SERVERFAULT, 346 0, 347}; 348 349static short nfsv3err_symlink[] = { 350 NFSERR_IO, 351 NFSERR_IO, 352 NFSERR_ACCES, 353 NFSERR_EXIST, 354 NFSERR_NOTDIR, 355 NFSERR_NOSPC, 356 NFSERR_ROFS, 357 NFSERR_NAMETOL, 358 NFSERR_DQUOT, 359 NFSERR_STALE, 360 NFSERR_BADHANDLE, 361 NFSERR_NOTSUPP, 362 NFSERR_SERVERFAULT, 363 0, 364}; 365 366static short nfsv3err_mknod[] = { 367 NFSERR_IO, 368 NFSERR_IO, 369 NFSERR_ACCES, 370 NFSERR_EXIST, 371 NFSERR_NOTDIR, 372 NFSERR_NOSPC, 373 NFSERR_ROFS, 374 NFSERR_NAMETOL, 375 NFSERR_DQUOT, 376 NFSERR_STALE, 377 NFSERR_BADHANDLE, 378 NFSERR_NOTSUPP, 379 NFSERR_SERVERFAULT, 380 NFSERR_BADTYPE, 381 0, 382}; 383 384static short nfsv3err_remove[] = { 385 NFSERR_IO, 386 NFSERR_NOENT, 387 NFSERR_IO, 388 NFSERR_ACCES, 389 NFSERR_NOTDIR, 390 NFSERR_ROFS, 391 NFSERR_NAMETOL, 392 NFSERR_STALE, 393 NFSERR_BADHANDLE, 394 NFSERR_SERVERFAULT, 395 0, 396}; 397 398static short nfsv3err_rmdir[] = { 399 NFSERR_IO, 400 NFSERR_NOENT, 401 NFSERR_IO, 402 NFSERR_ACCES, 403 NFSERR_EXIST, 404 NFSERR_NOTDIR, 405 NFSERR_INVAL, 406 NFSERR_ROFS, 407 NFSERR_NAMETOL, 408 NFSERR_NOTEMPTY, 409 NFSERR_STALE, 410 NFSERR_BADHANDLE, 411 NFSERR_NOTSUPP, 412 NFSERR_SERVERFAULT, 413 0, 414}; 415 416static short nfsv3err_rename[] = { 417 NFSERR_IO, 418 NFSERR_NOENT, 419 NFSERR_IO, 420 NFSERR_ACCES, 421 NFSERR_EXIST, 422 NFSERR_XDEV, 423 NFSERR_NOTDIR, 424 NFSERR_ISDIR, 425 NFSERR_INVAL, 426 NFSERR_NOSPC, 427 NFSERR_ROFS, 428 NFSERR_MLINK, 429 NFSERR_NAMETOL, 430 NFSERR_NOTEMPTY, 431 NFSERR_DQUOT, 432 NFSERR_STALE, 433 NFSERR_BADHANDLE, 434 NFSERR_NOTSUPP, 435 NFSERR_SERVERFAULT, 436 0, 437}; 438 439static short nfsv3err_link[] = { 440 NFSERR_IO, 441 NFSERR_IO, 442 NFSERR_ACCES, 443 NFSERR_EXIST, 444 NFSERR_XDEV, 445 NFSERR_NOTDIR, 446 NFSERR_INVAL, 447 NFSERR_NOSPC, 448 NFSERR_ROFS, 449 NFSERR_MLINK, 450 NFSERR_NAMETOL, 451 NFSERR_DQUOT, 452 NFSERR_STALE, 453 NFSERR_BADHANDLE, 454 NFSERR_NOTSUPP, 455 NFSERR_SERVERFAULT, 456 0, 457}; 458 459static short nfsv3err_readdir[] = { 460 NFSERR_IO, 461 NFSERR_IO, 462 NFSERR_ACCES, 463 NFSERR_NOTDIR, 464 NFSERR_STALE, 465 NFSERR_BADHANDLE, 466 NFSERR_BAD_COOKIE, 467 NFSERR_TOOSMALL, 468 NFSERR_SERVERFAULT, 469 0, 470}; 471 472static short nfsv3err_readdirplus[] = { 473 NFSERR_IO, 474 NFSERR_IO, 475 NFSERR_ACCES, 476 NFSERR_NOTDIR, 477 NFSERR_STALE, 478 NFSERR_BADHANDLE, 479 NFSERR_BAD_COOKIE, 480 NFSERR_NOTSUPP, 481 NFSERR_TOOSMALL, 482 NFSERR_SERVERFAULT, 483 0, 484}; 485 486static short nfsv3err_fsstat[] = { 487 NFSERR_IO, 488 NFSERR_IO, 489 NFSERR_STALE, 490 NFSERR_BADHANDLE, 491 NFSERR_SERVERFAULT, 492 0, 493}; 494 495static short nfsv3err_fsinfo[] = { 496 NFSERR_STALE, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501}; 502 503static short nfsv3err_pathconf[] = { 504 NFSERR_STALE, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_SERVERFAULT, 508 0, 509}; 510 511static short nfsv3err_commit[] = { 512 NFSERR_IO, 513 NFSERR_IO, 514 NFSERR_STALE, 515 NFSERR_BADHANDLE, 516 NFSERR_SERVERFAULT, 517 0, 518}; 519 520static short *nfsrv_v3errmap[] = { 521 nfsv3err_null, 522 nfsv3err_getattr, 523 nfsv3err_setattr, 524 nfsv3err_lookup, 525 nfsv3err_access, 526 nfsv3err_readlink, 527 nfsv3err_read, 528 nfsv3err_write, 529 nfsv3err_create, 530 nfsv3err_mkdir, 531 nfsv3err_symlink, 532 nfsv3err_mknod, 533 nfsv3err_remove, 534 nfsv3err_rmdir, 535 nfsv3err_rename, 536 nfsv3err_link, 537 nfsv3err_readdir, 538 nfsv3err_readdirplus, 539 nfsv3err_fsstat, 540 nfsv3err_fsinfo, 541 nfsv3err_pathconf, 542 nfsv3err_commit, 543}; 544 545#endif /* NFS_NOSERVER */ 546 547extern struct nfsrtt nfsrtt; 548extern time_t nqnfsstarttime; 549extern int nqsrv_clockskew; 550extern int nqsrv_writeslack; 551extern int nqsrv_maxlease; 552extern struct nfsstats nfsstats; 553extern int nqnfs_piggy[NFS_NPROCS]; 554extern nfstype nfsv2_type[9]; 555extern nfstype nfsv3_type[9]; 556extern struct nfsnodehashhead *nfsnodehashtbl; 557extern u_long nfsnodehash; 558 559struct nfssvc_args; 560extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 561 562LIST_HEAD(nfsnodehashhead, nfsnode); 563 564int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 565 566u_quad_t 567nfs_curusec() 568{ 569 struct timeval tv; 570 571 getmicrotime(&tv); 572 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 573} 574 575/* 576 * Create the header for an rpc request packet 577 * The hsiz is the size of the rest of the nfs request header. 578 * (just used to decide if a cluster is a good idea) 579 */ 580struct mbuf * 581nfsm_reqh(vp, procid, hsiz, bposp) 582 struct vnode *vp; 583 u_long procid; 584 int hsiz; 585 caddr_t *bposp; 586{ 587 register struct mbuf *mb; 588 register u_int32_t *tl; 589 register caddr_t bpos; 590 struct mbuf *mb2; 591 struct nfsmount *nmp; 592 int nqflag; 593 594 MGET(mb, M_WAIT, MT_DATA); 595 if (hsiz >= MINCLSIZE) 596 MCLGET(mb, M_WAIT); 597 mb->m_len = 0; 598 bpos = mtod(mb, caddr_t); 599 600 /* 601 * For NQNFS, add lease request. 602 */ 603 if (vp) { 604 nmp = VFSTONFS(vp->v_mount); 605 if (nmp->nm_flag & NFSMNT_NQNFS) { 606 nqflag = NQNFS_NEEDLEASE(vp, procid); 607 if (nqflag) { 608 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 609 *tl++ = txdr_unsigned(nqflag); 610 *tl = txdr_unsigned(nmp->nm_leaseterm); 611 } else { 612 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 613 *tl = 0; 614 } 615 } 616 } 617 /* Finally, return values */ 618 *bposp = bpos; 619 return (mb); 620} 621 622/* 623 * Build the RPC header and fill in the authorization info. 624 * The authorization string argument is only used when the credentials 625 * come from outside of the kernel. 626 * Returns the head of the mbuf list. 627 */ 628struct mbuf * 629nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 630 verf_str, mrest, mrest_len, mbp, xidp) 631 register struct ucred *cr; 632 int nmflag; 633 int procid; 634 int auth_type; 635 int auth_len; 636 char *auth_str; 637 int verf_len; 638 char *verf_str; 639 struct mbuf *mrest; 640 int mrest_len; 641 struct mbuf **mbp; 642 u_int32_t *xidp; 643{ 644 register struct mbuf *mb; 645 register u_int32_t *tl; 646 register caddr_t bpos; 647 register int i; 648 struct mbuf *mreq, *mb2; 649 int siz, grpsiz, authsiz; 650 651 authsiz = nfsm_rndup(auth_len); 652 MGETHDR(mb, M_WAIT, MT_DATA); 653 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 654 MCLGET(mb, M_WAIT); 655 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 656 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 657 } else { 658 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 659 } 660 mb->m_len = 0; 661 mreq = mb; 662 bpos = mtod(mb, caddr_t); 663 664 /* 665 * First the RPC header. 666 */ 667 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 668 669 /* Get a pretty random xid to start with */ 670 if (!nfs_xid) 671 nfs_xid = random(); 672 /* 673 * Skip zero xid if it should ever happen. 674 */ 675 if (++nfs_xid == 0) 676 nfs_xid++; 677 678 *tl++ = *xidp = txdr_unsigned(nfs_xid); 679 *tl++ = rpc_call; 680 *tl++ = rpc_vers; 681 if (nmflag & NFSMNT_NQNFS) { 682 *tl++ = txdr_unsigned(NQNFS_PROG); 683 *tl++ = txdr_unsigned(NQNFS_VER3); 684 } else { 685 *tl++ = txdr_unsigned(NFS_PROG); 686 if (nmflag & NFSMNT_NFSV3) 687 *tl++ = txdr_unsigned(NFS_VER3); 688 else 689 *tl++ = txdr_unsigned(NFS_VER2); 690 } 691 if (nmflag & NFSMNT_NFSV3) 692 *tl++ = txdr_unsigned(procid); 693 else 694 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 695 696 /* 697 * And then the authorization cred. 698 */ 699 *tl++ = txdr_unsigned(auth_type); 700 *tl = txdr_unsigned(authsiz); 701 switch (auth_type) { 702 case RPCAUTH_UNIX: 703 nfsm_build(tl, u_int32_t *, auth_len); 704 *tl++ = 0; /* stamp ?? */ 705 *tl++ = 0; /* NULL hostname */ 706 *tl++ = txdr_unsigned(cr->cr_uid); 707 *tl++ = txdr_unsigned(cr->cr_groups[0]); 708 grpsiz = (auth_len >> 2) - 5; 709 *tl++ = txdr_unsigned(grpsiz); 710 for (i = 1; i <= grpsiz; i++) 711 *tl++ = txdr_unsigned(cr->cr_groups[i]); 712 break; 713 case RPCAUTH_KERB4: 714 siz = auth_len; 715 while (siz > 0) { 716 if (M_TRAILINGSPACE(mb) == 0) { 717 MGET(mb2, M_WAIT, MT_DATA); 718 if (siz >= MINCLSIZE) 719 MCLGET(mb2, M_WAIT); 720 mb->m_next = mb2; 721 mb = mb2; 722 mb->m_len = 0; 723 bpos = mtod(mb, caddr_t); 724 } 725 i = min(siz, M_TRAILINGSPACE(mb)); 726 bcopy(auth_str, bpos, i); 727 mb->m_len += i; 728 auth_str += i; 729 bpos += i; 730 siz -= i; 731 } 732 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 733 for (i = 0; i < siz; i++) 734 *bpos++ = '\0'; 735 mb->m_len += siz; 736 } 737 break; 738 }; 739 740 /* 741 * And the verifier... 742 */ 743 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 744 if (verf_str) { 745 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 746 *tl = txdr_unsigned(verf_len); 747 siz = verf_len; 748 while (siz > 0) { 749 if (M_TRAILINGSPACE(mb) == 0) { 750 MGET(mb2, M_WAIT, MT_DATA); 751 if (siz >= MINCLSIZE) 752 MCLGET(mb2, M_WAIT); 753 mb->m_next = mb2; 754 mb = mb2; 755 mb->m_len = 0; 756 bpos = mtod(mb, caddr_t); 757 } 758 i = min(siz, M_TRAILINGSPACE(mb)); 759 bcopy(verf_str, bpos, i); 760 mb->m_len += i; 761 verf_str += i; 762 bpos += i; 763 siz -= i; 764 } 765 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 766 for (i = 0; i < siz; i++) 767 *bpos++ = '\0'; 768 mb->m_len += siz; 769 } 770 } else { 771 *tl++ = txdr_unsigned(RPCAUTH_NULL); 772 *tl = 0; 773 } 774 mb->m_next = mrest; 775 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 776 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 777 *mbp = mb; 778 return (mreq); 779} 780 781/* 782 * copies mbuf chain to the uio scatter/gather list 783 */ 784int 785nfsm_mbuftouio(mrep, uiop, siz, dpos) 786 struct mbuf **mrep; 787 register struct uio *uiop; 788 int siz; 789 caddr_t *dpos; 790{ 791 register char *mbufcp, *uiocp; 792 register int xfer, left, len; 793 register struct mbuf *mp; 794 long uiosiz, rem; 795 int error = 0; 796 797 mp = *mrep; 798 mbufcp = *dpos; 799 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 800 rem = nfsm_rndup(siz)-siz; 801 while (siz > 0) { 802 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 803 return (EFBIG); 804 left = uiop->uio_iov->iov_len; 805 uiocp = uiop->uio_iov->iov_base; 806 if (left > siz) 807 left = siz; 808 uiosiz = left; 809 while (left > 0) { 810 while (len == 0) { 811 mp = mp->m_next; 812 if (mp == NULL) 813 return (EBADRPC); 814 mbufcp = mtod(mp, caddr_t); 815 len = mp->m_len; 816 } 817 xfer = (left > len) ? len : left; 818#ifdef notdef 819 /* Not Yet.. */ 820 if (uiop->uio_iov->iov_op != NULL) 821 (*(uiop->uio_iov->iov_op)) 822 (mbufcp, uiocp, xfer); 823 else 824#endif 825 if (uiop->uio_segflg == UIO_SYSSPACE) 826 bcopy(mbufcp, uiocp, xfer); 827 else 828 copyout(mbufcp, uiocp, xfer); 829 left -= xfer; 830 len -= xfer; 831 mbufcp += xfer; 832 uiocp += xfer; 833 uiop->uio_offset += xfer; 834 uiop->uio_resid -= xfer; 835 } 836 if (uiop->uio_iov->iov_len <= siz) { 837 uiop->uio_iovcnt--; 838 uiop->uio_iov++; 839 } else { 840 uiop->uio_iov->iov_base += uiosiz; 841 uiop->uio_iov->iov_len -= uiosiz; 842 } 843 siz -= uiosiz; 844 } 845 *dpos = mbufcp; 846 *mrep = mp; 847 if (rem > 0) { 848 if (len < rem) 849 error = nfs_adv(mrep, dpos, rem, len); 850 else 851 *dpos += rem; 852 } 853 return (error); 854} 855 856/* 857 * copies a uio scatter/gather list to an mbuf chain. 858 * NOTE: can ony handle iovcnt == 1 859 */ 860int 861nfsm_uiotombuf(uiop, mq, siz, bpos) 862 register struct uio *uiop; 863 struct mbuf **mq; 864 int siz; 865 caddr_t *bpos; 866{ 867 register char *uiocp; 868 register struct mbuf *mp, *mp2; 869 register int xfer, left, mlen; 870 int uiosiz, clflg, rem; 871 char *cp; 872 873#ifdef DIAGNOSTIC 874 if (uiop->uio_iovcnt != 1) 875 panic("nfsm_uiotombuf: iovcnt != 1"); 876#endif 877 878 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 879 clflg = 1; 880 else 881 clflg = 0; 882 rem = nfsm_rndup(siz)-siz; 883 mp = mp2 = *mq; 884 while (siz > 0) { 885 left = uiop->uio_iov->iov_len; 886 uiocp = uiop->uio_iov->iov_base; 887 if (left > siz) 888 left = siz; 889 uiosiz = left; 890 while (left > 0) { 891 mlen = M_TRAILINGSPACE(mp); 892 if (mlen == 0) { 893 MGET(mp, M_WAIT, MT_DATA); 894 if (clflg) 895 MCLGET(mp, M_WAIT); 896 mp->m_len = 0; 897 mp2->m_next = mp; 898 mp2 = mp; 899 mlen = M_TRAILINGSPACE(mp); 900 } 901 xfer = (left > mlen) ? mlen : left; 902#ifdef notdef 903 /* Not Yet.. */ 904 if (uiop->uio_iov->iov_op != NULL) 905 (*(uiop->uio_iov->iov_op)) 906 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 907 else 908#endif 909 if (uiop->uio_segflg == UIO_SYSSPACE) 910 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 911 else 912 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 913 mp->m_len += xfer; 914 left -= xfer; 915 uiocp += xfer; 916 uiop->uio_offset += xfer; 917 uiop->uio_resid -= xfer; 918 } 919 uiop->uio_iov->iov_base += uiosiz; 920 uiop->uio_iov->iov_len -= uiosiz; 921 siz -= uiosiz; 922 } 923 if (rem > 0) { 924 if (rem > M_TRAILINGSPACE(mp)) { 925 MGET(mp, M_WAIT, MT_DATA); 926 mp->m_len = 0; 927 mp2->m_next = mp; 928 } 929 cp = mtod(mp, caddr_t)+mp->m_len; 930 for (left = 0; left < rem; left++) 931 *cp++ = '\0'; 932 mp->m_len += rem; 933 *bpos = cp; 934 } else 935 *bpos = mtod(mp, caddr_t)+mp->m_len; 936 *mq = mp; 937 return (0); 938} 939 940/* 941 * Help break down an mbuf chain by setting the first siz bytes contiguous 942 * pointed to by returned val. 943 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 944 * cases. (The macros use the vars. dpos and dpos2) 945 */ 946int 947nfsm_disct(mdp, dposp, siz, left, cp2) 948 struct mbuf **mdp; 949 caddr_t *dposp; 950 int siz; 951 int left; 952 caddr_t *cp2; 953{ 954 register struct mbuf *mp, *mp2; 955 register int siz2, xfer; 956 register caddr_t p; 957 958 mp = *mdp; 959 while (left == 0) { 960 *mdp = mp = mp->m_next; 961 if (mp == NULL) 962 return (EBADRPC); 963 left = mp->m_len; 964 *dposp = mtod(mp, caddr_t); 965 } 966 if (left >= siz) { 967 *cp2 = *dposp; 968 *dposp += siz; 969 } else if (mp->m_next == NULL) { 970 return (EBADRPC); 971 } else if (siz > MHLEN) { 972 panic("nfs S too big"); 973 } else { 974 MGET(mp2, M_WAIT, MT_DATA); 975 mp2->m_next = mp->m_next; 976 mp->m_next = mp2; 977 mp->m_len -= left; 978 mp = mp2; 979 *cp2 = p = mtod(mp, caddr_t); 980 bcopy(*dposp, p, left); /* Copy what was left */ 981 siz2 = siz-left; 982 p += left; 983 mp2 = mp->m_next; 984 /* Loop around copying up the siz2 bytes */ 985 while (siz2 > 0) { 986 if (mp2 == NULL) 987 return (EBADRPC); 988 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 989 if (xfer > 0) { 990 bcopy(mtod(mp2, caddr_t), p, xfer); 991 NFSMADV(mp2, xfer); 992 mp2->m_len -= xfer; 993 p += xfer; 994 siz2 -= xfer; 995 } 996 if (siz2 > 0) 997 mp2 = mp2->m_next; 998 } 999 mp->m_len = siz; 1000 *mdp = mp2; 1001 *dposp = mtod(mp2, caddr_t); 1002 } 1003 return (0); 1004} 1005 1006/* 1007 * Advance the position in the mbuf chain. 1008 */ 1009int 1010nfs_adv(mdp, dposp, offs, left) 1011 struct mbuf **mdp; 1012 caddr_t *dposp; 1013 int offs; 1014 int left; 1015{ 1016 register struct mbuf *m; 1017 register int s; 1018 1019 m = *mdp; 1020 s = left; 1021 while (s < offs) { 1022 offs -= s; 1023 m = m->m_next; 1024 if (m == NULL) 1025 return (EBADRPC); 1026 s = m->m_len; 1027 } 1028 *mdp = m; 1029 *dposp = mtod(m, caddr_t)+offs; 1030 return (0); 1031} 1032 1033/* 1034 * Copy a string into mbufs for the hard cases... 1035 */ 1036int 1037nfsm_strtmbuf(mb, bpos, cp, siz) 1038 struct mbuf **mb; 1039 char **bpos; 1040 const char *cp; 1041 long siz; 1042{ 1043 register struct mbuf *m1 = NULL, *m2; 1044 long left, xfer, len, tlen; 1045 u_int32_t *tl; 1046 int putsize; 1047 1048 putsize = 1; 1049 m2 = *mb; 1050 left = M_TRAILINGSPACE(m2); 1051 if (left > 0) { 1052 tl = ((u_int32_t *)(*bpos)); 1053 *tl++ = txdr_unsigned(siz); 1054 putsize = 0; 1055 left -= NFSX_UNSIGNED; 1056 m2->m_len += NFSX_UNSIGNED; 1057 if (left > 0) { 1058 bcopy(cp, (caddr_t) tl, left); 1059 siz -= left; 1060 cp += left; 1061 m2->m_len += left; 1062 left = 0; 1063 } 1064 } 1065 /* Loop around adding mbufs */ 1066 while (siz > 0) { 1067 MGET(m1, M_WAIT, MT_DATA); 1068 if (siz > MLEN) 1069 MCLGET(m1, M_WAIT); 1070 m1->m_len = NFSMSIZ(m1); 1071 m2->m_next = m1; 1072 m2 = m1; 1073 tl = mtod(m1, u_int32_t *); 1074 tlen = 0; 1075 if (putsize) { 1076 *tl++ = txdr_unsigned(siz); 1077 m1->m_len -= NFSX_UNSIGNED; 1078 tlen = NFSX_UNSIGNED; 1079 putsize = 0; 1080 } 1081 if (siz < m1->m_len) { 1082 len = nfsm_rndup(siz); 1083 xfer = siz; 1084 if (xfer < len) 1085 *(tl+(xfer>>2)) = 0; 1086 } else { 1087 xfer = len = m1->m_len; 1088 } 1089 bcopy(cp, (caddr_t) tl, xfer); 1090 m1->m_len = len+tlen; 1091 siz -= xfer; 1092 cp += xfer; 1093 } 1094 *mb = m1; 1095 *bpos = mtod(m1, caddr_t)+m1->m_len; 1096 return (0); 1097} 1098 1099/* 1100 * Called once to initialize data structures... 1101 */ 1102int 1103nfs_init(vfsp) 1104 struct vfsconf *vfsp; 1105{ 1106 register int i; 1107 1108 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1109 1110 /* 1111 * Check to see if major data structures haven't bloated. 1112 */ 1113 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1114 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1115 printf("Try reducing NFS_UIDHASHSIZ\n"); 1116 } 1117 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1118 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1119 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1120 } 1121 nfs_mount_type = vfsp->vfc_typenum; 1122 nfsrtt.pos = 0; 1123 rpc_vers = txdr_unsigned(RPC_VER2); 1124 rpc_call = txdr_unsigned(RPC_CALL); 1125 rpc_reply = txdr_unsigned(RPC_REPLY); 1126 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1127 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1128 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1129 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1130 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1131 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1132 nfs_prog = txdr_unsigned(NFS_PROG); 1133 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1134 nfs_true = txdr_unsigned(TRUE); 1135 nfs_false = txdr_unsigned(FALSE); 1136 nfs_xdrneg1 = txdr_unsigned(-1); 1137 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1138 if (nfs_ticks < 1) 1139 nfs_ticks = 1; 1140 /* Ensure async daemons disabled */ 1141 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1142 nfs_iodwant[i] = (struct proc *)0; 1143 nfs_iodmount[i] = (struct nfsmount *)0; 1144 } 1145 nfs_nhinit(); /* Init the nfsnode table */ 1146#ifndef NFS_NOSERVER 1147 nfsrv_init(0); /* Init server data structures */ 1148 nfsrv_initcache(); /* Init the server request cache */ 1149#endif 1150 1151 /* 1152 * Initialize the nqnfs server stuff. 1153 */ 1154 if (nqnfsstarttime == 0) { 1155 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1156 + nqsrv_clockskew + nqsrv_writeslack; 1157 NQLOADNOVRAM(nqnfsstarttime); 1158 CIRCLEQ_INIT(&nqtimerhead); 1159 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1160 } 1161 1162 /* 1163 * Initialize reply list and start timer 1164 */ 1165 TAILQ_INIT(&nfs_reqq); 1166 1167 nfs_timer(0); 1168 1169 /* 1170 * Set up lease_check and lease_updatetime so that other parts 1171 * of the system can call us, if we are loadable. 1172 */ 1173#ifndef NFS_NOSERVER 1174 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1175 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1176#endif 1177 nfs_prev_lease_updatetime = lease_updatetime; 1178 lease_updatetime = nfs_lease_updatetime; 1179 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1180 sysent[SYS_nfssvc].sy_narg = 2; 1181 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1182 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1183 1184 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1185 1186 return (0); 1187} 1188 1189int 1190nfs_uninit(vfsp) 1191 struct vfsconf *vfsp; 1192{ 1193 1194 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1195 nfs_mount_type = -1; 1196#ifndef NFS_NOSERVER 1197 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1198#endif 1199 lease_updatetime = nfs_prev_lease_updatetime; 1200 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1201 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1202 return (0); 1203} 1204 1205/* 1206 * Attribute cache routines. 1207 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1208 * that are on the mbuf list 1209 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1210 * error otherwise 1211 */ 1212 1213/* 1214 * Load the attribute cache (that lives in the nfsnode entry) with 1215 * the values on the mbuf list and 1216 * Iff vap not NULL 1217 * copy the attributes to *vaper 1218 */ 1219int 1220nfs_loadattrcache(vpp, mdp, dposp, vaper) 1221 struct vnode **vpp; 1222 struct mbuf **mdp; 1223 caddr_t *dposp; 1224 struct vattr *vaper; 1225{ 1226 register struct vnode *vp = *vpp; 1227 register struct vattr *vap; 1228 register struct nfs_fattr *fp; 1229 register struct nfsnode *np; 1230 register int32_t t1; 1231 caddr_t cp2; 1232 int error = 0, rdev; 1233 struct mbuf *md; 1234 enum vtype vtyp; 1235 u_short vmode; 1236 struct timespec mtime; 1237 int v3 = NFS_ISV3(vp); 1238 1239 md = *mdp; 1240 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1241 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1242 return (error); 1243 fp = (struct nfs_fattr *)cp2; 1244 if (v3) { 1245 vtyp = nfsv3tov_type(fp->fa_type); 1246 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1247 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1248 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1249 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1250 } else { 1251 vtyp = nfsv2tov_type(fp->fa_type); 1252 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1253 /* 1254 * XXX 1255 * 1256 * The duplicate information returned in fa_type and fa_mode 1257 * is an ambiguity in the NFS version 2 protocol. 1258 * 1259 * VREG should be taken literally as a regular file. If a 1260 * server intents to return some type information differently 1261 * in the upper bits of the mode field (e.g. for sockets, or 1262 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1263 * leave the examination of the mode bits even in the VREG 1264 * case to avoid breakage for bogus servers, but we make sure 1265 * that there are actually type bits set in the upper part of 1266 * fa_mode (and failing that, trust the va_type field). 1267 * 1268 * NFSv3 cleared the issue, and requires fa_mode to not 1269 * contain any type information (while also introduing sockets 1270 * and FIFOs for fa_type). 1271 */ 1272 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1273 vtyp = IFTOVT(vmode); 1274 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1275 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1276 1277 /* 1278 * Really ugly NFSv2 kludge. 1279 */ 1280 if (vtyp == VCHR && rdev == 0xffffffff) 1281 vtyp = VFIFO; 1282 } 1283 1284 /* 1285 * If v_type == VNON it is a new node, so fill in the v_type, 1286 * n_mtime fields. Check to see if it represents a special 1287 * device, and if so, check for a possible alias. Once the 1288 * correct vnode has been obtained, fill in the rest of the 1289 * information. 1290 */ 1291 np = VTONFS(vp); 1292 if (vp->v_type != vtyp) { 1293 vp->v_type = vtyp; 1294 if (vp->v_type == VFIFO) { 1295 vp->v_op = fifo_nfsv2nodeop_p; 1296 } 1297 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1298 vp->v_op = spec_nfsv2nodeop_p; 1299 addaliasu(vp, rdev); 1300 } 1301 np->n_mtime = mtime.tv_sec; 1302 } 1303 vap = &np->n_vattr; 1304 vap->va_type = vtyp; 1305 vap->va_mode = (vmode & 07777); 1306 vap->va_rdev = rdev; 1307 vap->va_mtime = mtime; 1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1309 if (v3) { 1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1313 vap->va_size = fxdr_hyper(&fp->fa3_size); 1314 vap->va_blocksize = NFS_FABLKSIZE; 1315 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1316 vap->va_fileid = fxdr_unsigned(int32_t, 1317 fp->fa3_fileid.nfsuquad[1]); 1318 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1319 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1320 vap->va_flags = 0; 1321 vap->va_filerev = 0; 1322 } else { 1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1326 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1327 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1328 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1329 * NFS_FABLKSIZE; 1330 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1331 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1332 vap->va_flags = 0; 1333 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1334 fp->fa2_ctime.nfsv2_sec); 1335 vap->va_ctime.tv_nsec = 0; 1336 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1337 vap->va_filerev = 0; 1338 } 1339 if (vap->va_size != np->n_size) { 1340 if (vap->va_type == VREG) { 1341 if (np->n_flag & NMODIFIED) { 1342 if (vap->va_size < np->n_size) 1343 vap->va_size = np->n_size; 1344 else 1345 np->n_size = vap->va_size; 1346 } else { 1347 np->n_size = vap->va_size; 1348 } 1349 vnode_pager_setsize(vp, np->n_size); 1350 } else { 1351 np->n_size = vap->va_size; 1352 } 1353 } 1354 np->n_attrstamp = time_second; 1355 if (vaper != NULL) { 1356 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1357 if (np->n_flag & NCHG) { 1358 if (np->n_flag & NACC) 1359 vaper->va_atime = np->n_atim; 1360 if (np->n_flag & NUPD) 1361 vaper->va_mtime = np->n_mtim; 1362 } 1363 } 1364 return (0); 1365} 1366 1367#ifdef NFS_ACDEBUG 1368#include <sys/sysctl.h> 1369SYSCTL_DECL(_vfs_nfs); 1370static int nfs_acdebug; 1371SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1372#endif 1373 1374/* 1375 * Check the time stamp 1376 * If the cache is valid, copy contents to *vap and return 0 1377 * otherwise return an error 1378 */ 1379int 1380nfs_getattrcache(vp, vaper) 1381 register struct vnode *vp; 1382 struct vattr *vaper; 1383{ 1384 register struct nfsnode *np; 1385 register struct vattr *vap; 1386 struct nfsmount *nmp; 1387 int timeo; 1388 1389 np = VTONFS(vp); 1390 vap = &np->n_vattr; 1391 nmp = VFSTONFS(vp->v_mount); 1392 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1393 timeo = (time_second - np->n_mtime) / 10; 1394 1395#ifdef NFS_ACDEBUG 1396 if (nfs_acdebug>1) 1397 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1398#endif 1399 1400 if (vap->va_type == VDIR) { 1401 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1402 timeo = nmp->nm_acdirmin; 1403 else if (timeo > nmp->nm_acdirmax) 1404 timeo = nmp->nm_acdirmax; 1405 } else { 1406 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1407 timeo = nmp->nm_acregmin; 1408 else if (timeo > nmp->nm_acregmax) 1409 timeo = nmp->nm_acregmax; 1410 } 1411 1412#ifdef NFS_ACDEBUG 1413 if (nfs_acdebug > 2) 1414 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1415 nmp->nm_acregmin, nmp->nm_acregmax, 1416 nmp->nm_acdirmin, nmp->nm_acdirmax); 1417 1418 if (nfs_acdebug) 1419 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1420 (time_second - np->n_attrstamp), timeo); 1421#endif 1422 1423 if ((time_second - np->n_attrstamp) >= timeo) { 1424 nfsstats.attrcache_misses++; 1425 return (ENOENT); 1426 } 1427 nfsstats.attrcache_hits++; 1428 if (vap->va_size != np->n_size) { 1429 if (vap->va_type == VREG) { 1430 if (np->n_flag & NMODIFIED) { 1431 if (vap->va_size < np->n_size) 1432 vap->va_size = np->n_size; 1433 else 1434 np->n_size = vap->va_size; 1435 } else { 1436 np->n_size = vap->va_size; 1437 } 1438 vnode_pager_setsize(vp, np->n_size); 1439 } else { 1440 np->n_size = vap->va_size; 1441 } 1442 } 1443 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1444 if (np->n_flag & NCHG) { 1445 if (np->n_flag & NACC) 1446 vaper->va_atime = np->n_atim; 1447 if (np->n_flag & NUPD) 1448 vaper->va_mtime = np->n_mtim; 1449 } 1450 return (0); 1451} 1452 1453#ifndef NFS_NOSERVER 1454/* 1455 * Set up nameidata for a lookup() call and do it. 1456 * 1457 * If pubflag is set, this call is done for a lookup operation on the 1458 * public filehandle. In that case we allow crossing mountpoints and 1459 * absolute pathnames. However, the caller is expected to check that 1460 * the lookup result is within the public fs, and deny access if 1461 * it is not. 1462 * 1463 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1464 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1465 * error occurs but the parent was not requested. 1466 * 1467 * dirp may be set whether an error is returned or not, and must be 1468 * released by the caller. 1469 */ 1470int 1471nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1472 register struct nameidata *ndp; 1473 fhandle_t *fhp; 1474 int len; 1475 struct nfssvc_sock *slp; 1476 struct sockaddr *nam; 1477 struct mbuf **mdp; 1478 caddr_t *dposp; 1479 struct vnode **retdirp; 1480 struct proc *p; 1481 int kerbflag, pubflag; 1482{ 1483 register int i, rem; 1484 register struct mbuf *md; 1485 register char *fromcp, *tocp, *cp; 1486 struct iovec aiov; 1487 struct uio auio; 1488 struct vnode *dp; 1489 int error, rdonly, linklen; 1490 struct componentname *cnp = &ndp->ni_cnd; 1491 1492 *retdirp = (struct vnode *)0; 1493 cnp->cn_pnbuf = zalloc(namei_zone); 1494 1495 /* 1496 * Copy the name from the mbuf list to ndp->ni_pnbuf 1497 * and set the various ndp fields appropriately. 1498 */ 1499 fromcp = *dposp; 1500 tocp = cnp->cn_pnbuf; 1501 md = *mdp; 1502 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1503 for (i = 0; i < len; i++) { 1504 while (rem == 0) { 1505 md = md->m_next; 1506 if (md == NULL) { 1507 error = EBADRPC; 1508 goto out; 1509 } 1510 fromcp = mtod(md, caddr_t); 1511 rem = md->m_len; 1512 } 1513 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1514 error = EACCES; 1515 goto out; 1516 } 1517 *tocp++ = *fromcp++; 1518 rem--; 1519 } 1520 *tocp = '\0'; 1521 *mdp = md; 1522 *dposp = fromcp; 1523 len = nfsm_rndup(len)-len; 1524 if (len > 0) { 1525 if (rem >= len) 1526 *dposp += len; 1527 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1528 goto out; 1529 } 1530 1531 /* 1532 * Extract and set starting directory. 1533 */ 1534 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1535 nam, &rdonly, kerbflag, pubflag); 1536 if (error) 1537 goto out; 1538 if (dp->v_type != VDIR) { 1539 vrele(dp); 1540 error = ENOTDIR; 1541 goto out; 1542 } 1543 1544 if (rdonly) 1545 cnp->cn_flags |= RDONLY; 1546 1547 /* 1548 * Set return directory. Reference to dp is implicitly transfered 1549 * to the returned pointer 1550 */ 1551 *retdirp = dp; 1552 1553 if (pubflag) { 1554 /* 1555 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1556 * and the 'native path' indicator. 1557 */ 1558 cp = zalloc(namei_zone); 1559 fromcp = cnp->cn_pnbuf; 1560 tocp = cp; 1561 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1562 switch ((unsigned char)*fromcp) { 1563 case WEBNFS_NATIVE_CHAR: 1564 /* 1565 * 'Native' path for us is the same 1566 * as a path according to the NFS spec, 1567 * just skip the escape char. 1568 */ 1569 fromcp++; 1570 break; 1571 /* 1572 * More may be added in the future, range 0x80-0xff 1573 */ 1574 default: 1575 error = EIO; 1576 zfree(namei_zone, cp); 1577 goto out; 1578 } 1579 } 1580 /* 1581 * Translate the '%' escapes, URL-style. 1582 */ 1583 while (*fromcp != '\0') { 1584 if (*fromcp == WEBNFS_ESC_CHAR) { 1585 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1586 fromcp++; 1587 *tocp++ = HEXSTRTOI(fromcp); 1588 fromcp += 2; 1589 continue; 1590 } else { 1591 error = ENOENT; 1592 zfree(namei_zone, cp); 1593 goto out; 1594 } 1595 } else 1596 *tocp++ = *fromcp++; 1597 } 1598 *tocp = '\0'; 1599 zfree(namei_zone, cnp->cn_pnbuf); 1600 cnp->cn_pnbuf = cp; 1601 } 1602 1603 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1604 ndp->ni_segflg = UIO_SYSSPACE; 1605 1606 if (pubflag) { 1607 ndp->ni_rootdir = rootvnode; 1608 ndp->ni_loopcnt = 0; 1609 if (cnp->cn_pnbuf[0] == '/') 1610 dp = rootvnode; 1611 } else { 1612 cnp->cn_flags |= NOCROSSMOUNT; 1613 } 1614 1615 /* 1616 * Initialize for scan, set ni_startdir and bump ref on dp again 1617 * becuase lookup() will dereference ni_startdir. 1618 */ 1619 1620 cnp->cn_proc = p; 1621 VREF(dp); 1622 ndp->ni_startdir = dp; 1623 1624 for (;;) { 1625 cnp->cn_nameptr = cnp->cn_pnbuf; 1626 /* 1627 * Call lookup() to do the real work. If an error occurs, 1628 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1629 * we do not have to dereference anything before returning. 1630 * In either case ni_startdir will be dereferenced and NULLed 1631 * out. 1632 */ 1633 error = lookup(ndp); 1634 if (error) 1635 break; 1636 1637 /* 1638 * Check for encountering a symbolic link. Trivial 1639 * termination occurs if no symlink encountered. 1640 * Note: zfree is safe because error is 0, so we will 1641 * not zfree it again when we break. 1642 */ 1643 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1644 nfsrv_object_create(ndp->ni_vp); 1645 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 1646 cnp->cn_flags |= HASBUF; 1647 else 1648 zfree(namei_zone, cnp->cn_pnbuf); 1649 break; 1650 } 1651 1652 /* 1653 * Validate symlink 1654 */ 1655 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1656 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1657 if (!pubflag) { 1658 error = EINVAL; 1659 goto badlink2; 1660 } 1661 1662 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1663 error = ELOOP; 1664 goto badlink2; 1665 } 1666 if (ndp->ni_pathlen > 1) 1667 cp = zalloc(namei_zone); 1668 else 1669 cp = cnp->cn_pnbuf; 1670 aiov.iov_base = cp; 1671 aiov.iov_len = MAXPATHLEN; 1672 auio.uio_iov = &aiov; 1673 auio.uio_iovcnt = 1; 1674 auio.uio_offset = 0; 1675 auio.uio_rw = UIO_READ; 1676 auio.uio_segflg = UIO_SYSSPACE; 1677 auio.uio_procp = (struct proc *)0; 1678 auio.uio_resid = MAXPATHLEN; 1679 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1680 if (error) { 1681 badlink1: 1682 if (ndp->ni_pathlen > 1) 1683 zfree(namei_zone, cp); 1684 badlink2: 1685 vrele(ndp->ni_dvp); 1686 vput(ndp->ni_vp); 1687 break; 1688 } 1689 linklen = MAXPATHLEN - auio.uio_resid; 1690 if (linklen == 0) { 1691 error = ENOENT; 1692 goto badlink1; 1693 } 1694 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1695 error = ENAMETOOLONG; 1696 goto badlink1; 1697 } 1698 1699 /* 1700 * Adjust or replace path 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 1710 /* 1711 * Cleanup refs for next loop and check if root directory 1712 * should replace current directory. Normally ni_dvp 1713 * becomes the new base directory and is cleaned up when 1714 * we loop. Explicitly null pointers after invalidation 1715 * to clarify operation. 1716 */ 1717 vput(ndp->ni_vp); 1718 ndp->ni_vp = NULL; 1719 1720 if (cnp->cn_pnbuf[0] == '/') { 1721 vrele(ndp->ni_dvp); 1722 ndp->ni_dvp = ndp->ni_rootdir; 1723 VREF(ndp->ni_dvp); 1724 } 1725 ndp->ni_startdir = ndp->ni_dvp; 1726 ndp->ni_dvp = NULL; 1727 } 1728 1729 /* 1730 * nfs_namei() guarentees that fields will not contain garbage 1731 * whether an error occurs or not. This allows the caller to track 1732 * cleanup state trivially. 1733 */ 1734out: 1735 if (error) { 1736 zfree(namei_zone, cnp->cn_pnbuf); 1737 ndp->ni_vp = NULL; 1738 ndp->ni_dvp = NULL; 1739 ndp->ni_startdir = NULL; 1740 cnp->cn_flags &= ~HASBUF; 1741 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 1742 ndp->ni_dvp = NULL; 1743 } 1744 return (error); 1745} 1746 1747/* 1748 * A fiddled version of m_adj() that ensures null fill to a long 1749 * boundary and only trims off the back end 1750 */ 1751void 1752nfsm_adj(mp, len, nul) 1753 struct mbuf *mp; 1754 register int len; 1755 int nul; 1756{ 1757 register struct mbuf *m; 1758 register int count, i; 1759 register char *cp; 1760 1761 /* 1762 * Trim from tail. Scan the mbuf chain, 1763 * calculating its length and finding the last mbuf. 1764 * If the adjustment only affects this mbuf, then just 1765 * adjust and return. Otherwise, rescan and truncate 1766 * after the remaining size. 1767 */ 1768 count = 0; 1769 m = mp; 1770 for (;;) { 1771 count += m->m_len; 1772 if (m->m_next == (struct mbuf *)0) 1773 break; 1774 m = m->m_next; 1775 } 1776 if (m->m_len > len) { 1777 m->m_len -= len; 1778 if (nul > 0) { 1779 cp = mtod(m, caddr_t)+m->m_len-nul; 1780 for (i = 0; i < nul; i++) 1781 *cp++ = '\0'; 1782 } 1783 return; 1784 } 1785 count -= len; 1786 if (count < 0) 1787 count = 0; 1788 /* 1789 * Correct length for chain is "count". 1790 * Find the mbuf with last data, adjust its length, 1791 * and toss data from remaining mbufs on chain. 1792 */ 1793 for (m = mp; m; m = m->m_next) { 1794 if (m->m_len >= count) { 1795 m->m_len = count; 1796 if (nul > 0) { 1797 cp = mtod(m, caddr_t)+m->m_len-nul; 1798 for (i = 0; i < nul; i++) 1799 *cp++ = '\0'; 1800 } 1801 break; 1802 } 1803 count -= m->m_len; 1804 } 1805 for (m = m->m_next;m;m = m->m_next) 1806 m->m_len = 0; 1807} 1808 1809/* 1810 * Make these functions instead of macros, so that the kernel text size 1811 * doesn't get too big... 1812 */ 1813void 1814nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1815 struct nfsrv_descript *nfsd; 1816 int before_ret; 1817 register struct vattr *before_vap; 1818 int after_ret; 1819 struct vattr *after_vap; 1820 struct mbuf **mbp; 1821 char **bposp; 1822{ 1823 register struct mbuf *mb = *mbp, *mb2; 1824 register char *bpos = *bposp; 1825 register u_int32_t *tl; 1826 1827 if (before_ret) { 1828 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1829 *tl = nfs_false; 1830 } else { 1831 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1832 *tl++ = nfs_true; 1833 txdr_hyper(before_vap->va_size, tl); 1834 tl += 2; 1835 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1836 tl += 2; 1837 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1838 } 1839 *bposp = bpos; 1840 *mbp = mb; 1841 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1842} 1843 1844void 1845nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1846 struct nfsrv_descript *nfsd; 1847 int after_ret; 1848 struct vattr *after_vap; 1849 struct mbuf **mbp; 1850 char **bposp; 1851{ 1852 register struct mbuf *mb = *mbp, *mb2; 1853 register char *bpos = *bposp; 1854 register u_int32_t *tl; 1855 register struct nfs_fattr *fp; 1856 1857 if (after_ret) { 1858 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1859 *tl = nfs_false; 1860 } else { 1861 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1862 *tl++ = nfs_true; 1863 fp = (struct nfs_fattr *)tl; 1864 nfsm_srvfattr(nfsd, after_vap, fp); 1865 } 1866 *mbp = mb; 1867 *bposp = bpos; 1868} 1869 1870void 1871nfsm_srvfattr(nfsd, vap, fp) 1872 register struct nfsrv_descript *nfsd; 1873 register struct vattr *vap; 1874 register struct nfs_fattr *fp; 1875{ 1876 1877 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1878 fp->fa_uid = txdr_unsigned(vap->va_uid); 1879 fp->fa_gid = txdr_unsigned(vap->va_gid); 1880 if (nfsd->nd_flag & ND_NFSV3) { 1881 fp->fa_type = vtonfsv3_type(vap->va_type); 1882 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1883 txdr_hyper(vap->va_size, &fp->fa3_size); 1884 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1885 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1886 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1887 fp->fa3_fsid.nfsuquad[0] = 0; 1888 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1889 fp->fa3_fileid.nfsuquad[0] = 0; 1890 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1891 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1892 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1893 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1894 } else { 1895 fp->fa_type = vtonfsv2_type(vap->va_type); 1896 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1897 fp->fa2_size = txdr_unsigned(vap->va_size); 1898 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1899 if (vap->va_type == VFIFO) 1900 fp->fa2_rdev = 0xffffffff; 1901 else 1902 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1903 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1904 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1905 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1906 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1907 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1908 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1909 } 1910} 1911 1912/* 1913 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1914 * - look up fsid in mount list (if not found ret error) 1915 * - get vp and export rights by calling VFS_FHTOVP() 1916 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1917 * - if not lockflag unlock it with VOP_UNLOCK() 1918 */ 1919int 1920nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1921 fhandle_t *fhp; 1922 int lockflag; 1923 struct vnode **vpp; 1924 struct ucred *cred; 1925 struct nfssvc_sock *slp; 1926 struct sockaddr *nam; 1927 int *rdonlyp; 1928 int kerbflag; 1929 int pubflag; 1930{ 1931 struct proc *p = curproc; /* XXX */ 1932 register struct mount *mp; 1933 register int i; 1934 struct ucred *credanon; 1935 int error, exflags; 1936#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1937 struct sockaddr_int *saddr; 1938#endif 1939 1940 *vpp = (struct vnode *)0; 1941 1942 if (nfs_ispublicfh(fhp)) { 1943 if (!pubflag || !nfs_pub.np_valid) 1944 return (ESTALE); 1945 fhp = &nfs_pub.np_handle; 1946 } 1947 1948 mp = vfs_getvfs(&fhp->fh_fsid); 1949 if (!mp) 1950 return (ESTALE); 1951 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1952 if (error) 1953 return (error); 1954 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1955 if (error) 1956 return (error); 1957#ifdef MNT_EXNORESPORT 1958 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1959 saddr = (struct sockaddr_in *)nam; 1960 if (saddr->sin_family == AF_INET && 1961 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1962 vput(*vpp); 1963 *vpp = NULL; 1964 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1965 } 1966 } 1967#endif 1968 /* 1969 * Check/setup credentials. 1970 */ 1971 if (exflags & MNT_EXKERB) { 1972 if (!kerbflag) { 1973 vput(*vpp); 1974 *vpp = NULL; 1975 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1976 } 1977 } else if (kerbflag) { 1978 vput(*vpp); 1979 *vpp = NULL; 1980 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1981 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1982 cred->cr_uid = credanon->cr_uid; 1983 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1984 cred->cr_groups[i] = credanon->cr_groups[i]; 1985 cred->cr_ngroups = i; 1986 } 1987 if (exflags & MNT_EXRDONLY) 1988 *rdonlyp = 1; 1989 else 1990 *rdonlyp = 0; 1991 1992 nfsrv_object_create(*vpp); 1993 1994 if (!lockflag) 1995 VOP_UNLOCK(*vpp, 0, p); 1996 return (0); 1997} 1998 1999 2000/* 2001 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2002 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2003 * transformed this to all zeroes in both cases, so check for it. 2004 */ 2005int 2006nfs_ispublicfh(fhp) 2007 fhandle_t *fhp; 2008{ 2009 char *cp = (char *)fhp; 2010 int i; 2011 2012 for (i = 0; i < NFSX_V3FH; i++) 2013 if (*cp++ != 0) 2014 return (FALSE); 2015 return (TRUE); 2016} 2017 2018#endif /* NFS_NOSERVER */ 2019/* 2020 * This function compares two net addresses by family and returns TRUE 2021 * if they are the same host. 2022 * If there is any doubt, return FALSE. 2023 * The AF_INET family is handled as a special case so that address mbufs 2024 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2025 */ 2026int 2027netaddr_match(family, haddr, nam) 2028 int family; 2029 union nethostaddr *haddr; 2030 struct sockaddr *nam; 2031{ 2032 register struct sockaddr_in *inetaddr; 2033 2034 switch (family) { 2035 case AF_INET: 2036 inetaddr = (struct sockaddr_in *)nam; 2037 if (inetaddr->sin_family == AF_INET && 2038 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2039 return (1); 2040 break; 2041#ifdef ISO 2042 case AF_ISO: 2043 { 2044 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2045 2046 isoaddr1 = (struct sockaddr_iso *)nam; 2047 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2048 if (isoaddr1->siso_family == AF_ISO && 2049 isoaddr1->siso_nlen > 0 && 2050 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2051 SAME_ISOADDR(isoaddr1, isoaddr2)) 2052 return (1); 2053 break; 2054 } 2055#endif /* ISO */ 2056 default: 2057 break; 2058 }; 2059 return (0); 2060} 2061 2062static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 2063/* 2064 * This function finds the directory cookie that corresponds to the 2065 * logical byte offset given. 2066 */ 2067nfsuint64 * 2068nfs_getcookie(np, off, add) 2069 register struct nfsnode *np; 2070 off_t off; 2071 int add; 2072{ 2073 register struct nfsdmap *dp, *dp2; 2074 register int pos; 2075 2076 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2077 if (pos == 0 || off < 0) { 2078#ifdef DIAGNOSTIC 2079 if (add) 2080 panic("nfs getcookie add at <= 0"); 2081#endif 2082 return (&nfs_nullcookie); 2083 } 2084 pos--; 2085 dp = np->n_cookies.lh_first; 2086 if (!dp) { 2087 if (add) { 2088 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2089 M_NFSDIROFF, M_WAITOK); 2090 dp->ndm_eocookie = 0; 2091 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2092 } else 2093 return ((nfsuint64 *)0); 2094 } 2095 while (pos >= NFSNUMCOOKIES) { 2096 pos -= NFSNUMCOOKIES; 2097 if (dp->ndm_list.le_next) { 2098 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2099 pos >= dp->ndm_eocookie) 2100 return ((nfsuint64 *)0); 2101 dp = dp->ndm_list.le_next; 2102 } else if (add) { 2103 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2104 M_NFSDIROFF, M_WAITOK); 2105 dp2->ndm_eocookie = 0; 2106 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2107 dp = dp2; 2108 } else 2109 return ((nfsuint64 *)0); 2110 } 2111 if (pos >= dp->ndm_eocookie) { 2112 if (add) 2113 dp->ndm_eocookie = pos + 1; 2114 else 2115 return ((nfsuint64 *)0); 2116 } 2117 return (&dp->ndm_cookies[pos]); 2118} 2119 2120/* 2121 * Invalidate cached directory information, except for the actual directory 2122 * blocks (which are invalidated separately). 2123 * Done mainly to avoid the use of stale offset cookies. 2124 */ 2125void 2126nfs_invaldir(vp) 2127 register struct vnode *vp; 2128{ 2129 register struct nfsnode *np = VTONFS(vp); 2130 2131#ifdef DIAGNOSTIC 2132 if (vp->v_type != VDIR) 2133 panic("nfs: invaldir not dir"); 2134#endif 2135 np->n_direofoffset = 0; 2136 np->n_cookieverf.nfsuquad[0] = 0; 2137 np->n_cookieverf.nfsuquad[1] = 0; 2138 if (np->n_cookies.lh_first) 2139 np->n_cookies.lh_first->ndm_eocookie = 0; 2140} 2141 2142/* 2143 * The write verifier has changed (probably due to a server reboot), so all 2144 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2145 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2146 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 2147 * mount point. 2148 * 2149 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 2150 * writes are not clusterable. 2151 */ 2152void 2153nfs_clearcommit(mp) 2154 struct mount *mp; 2155{ 2156 register struct vnode *vp, *nvp; 2157 register struct buf *bp, *nbp; 2158 int s; 2159 2160 s = splbio(); 2161loop: 2162 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2163 if (vp->v_mount != mp) /* Paranoia */ 2164 goto loop; 2165 nvp = vp->v_mntvnodes.le_next; 2166 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2167 nbp = TAILQ_NEXT(bp, b_vnbufs); 2168 if (BUF_REFCNT(bp) == 0 && 2169 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2170 == (B_DELWRI | B_NEEDCOMMIT)) 2171 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2172 } 2173 } 2174 splx(s); 2175} 2176 2177#ifndef NFS_NOSERVER 2178/* 2179 * Map errnos to NFS error numbers. For Version 3 also filter out error 2180 * numbers not specified for the associated procedure. 2181 */ 2182int 2183nfsrv_errmap(nd, err) 2184 struct nfsrv_descript *nd; 2185 register int err; 2186{ 2187 register short *defaulterrp, *errp; 2188 2189 if (nd->nd_flag & ND_NFSV3) { 2190 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2191 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2192 while (*++errp) { 2193 if (*errp == err) 2194 return (err); 2195 else if (*errp > err) 2196 break; 2197 } 2198 return ((int)*defaulterrp); 2199 } else 2200 return (err & 0xffff); 2201 } 2202 if (err <= ELAST) 2203 return ((int)nfsrv_v2errmap[err - 1]); 2204 return (NFSERR_IO); 2205} 2206 2207int 2208nfsrv_object_create(vp) 2209 struct vnode *vp; 2210{ 2211 2212 if (vp == NULL || vp->v_type != VREG) 2213 return (1); 2214 return (vfs_object_create(vp, curproc, 2215 curproc ? curproc->p_ucred : NULL)); 2216} 2217 2218/* 2219 * Sort the group list in increasing numerical order. 2220 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2221 * that used to be here.) 2222 */ 2223void 2224nfsrvw_sort(list, num) 2225 register gid_t *list; 2226 register int num; 2227{ 2228 register int i, j; 2229 gid_t v; 2230 2231 /* Insertion sort. */ 2232 for (i = 1; i < num; i++) { 2233 v = list[i]; 2234 /* find correct slot for value v, moving others up */ 2235 for (j = i; --j >= 0 && v < list[j];) 2236 list[j + 1] = list[j]; 2237 list[j + 1] = v; 2238 } 2239} 2240 2241/* 2242 * copy credentials making sure that the result can be compared with bcmp(). 2243 */ 2244void 2245nfsrv_setcred(incred, outcred) 2246 register struct ucred *incred, *outcred; 2247{ 2248 register int i; 2249 2250 bzero((caddr_t)outcred, sizeof (struct ucred)); 2251 outcred->cr_ref = 1; 2252 outcred->cr_uid = incred->cr_uid; 2253 outcred->cr_ngroups = incred->cr_ngroups; 2254 for (i = 0; i < incred->cr_ngroups; i++) 2255 outcred->cr_groups[i] = incred->cr_groups[i]; 2256 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2257} 2258#endif /* NFS_NOSERVER */ 2259