nfs_srvsubs.c revision 55934
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/nfsserver/nfs_srvsubs.c 55934 2000-01-13 20:18:25Z dillon $ 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 nfs_mount_type = vfsp->vfc_typenum; 1111 nfsrtt.pos = 0; 1112 rpc_vers = txdr_unsigned(RPC_VER2); 1113 rpc_call = txdr_unsigned(RPC_CALL); 1114 rpc_reply = txdr_unsigned(RPC_REPLY); 1115 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1116 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1117 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1118 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1119 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1120 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1121 nfs_prog = txdr_unsigned(NFS_PROG); 1122 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1123 nfs_true = txdr_unsigned(TRUE); 1124 nfs_false = txdr_unsigned(FALSE); 1125 nfs_xdrneg1 = txdr_unsigned(-1); 1126 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1127 if (nfs_ticks < 1) 1128 nfs_ticks = 1; 1129 /* Ensure async daemons disabled */ 1130 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1131 nfs_iodwant[i] = (struct proc *)0; 1132 nfs_iodmount[i] = (struct nfsmount *)0; 1133 } 1134 nfs_nhinit(); /* Init the nfsnode table */ 1135#ifndef NFS_NOSERVER 1136 nfsrv_init(0); /* Init server data structures */ 1137 nfsrv_initcache(); /* Init the server request cache */ 1138#endif 1139 1140 /* 1141 * Initialize the nqnfs server stuff. 1142 */ 1143 if (nqnfsstarttime == 0) { 1144 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1145 + nqsrv_clockskew + nqsrv_writeslack; 1146 NQLOADNOVRAM(nqnfsstarttime); 1147 CIRCLEQ_INIT(&nqtimerhead); 1148 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1149 } 1150 1151 /* 1152 * Initialize reply list and start timer 1153 */ 1154 TAILQ_INIT(&nfs_reqq); 1155 1156 nfs_timer(0); 1157 1158 /* 1159 * Set up lease_check and lease_updatetime so that other parts 1160 * of the system can call us, if we are loadable. 1161 */ 1162#ifndef NFS_NOSERVER 1163 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1164 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1165#endif 1166 nfs_prev_lease_updatetime = lease_updatetime; 1167 lease_updatetime = nfs_lease_updatetime; 1168 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1169 sysent[SYS_nfssvc].sy_narg = 2; 1170 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1171 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1172 1173 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1174 1175 return (0); 1176} 1177 1178int 1179nfs_uninit(vfsp) 1180 struct vfsconf *vfsp; 1181{ 1182 1183 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1184 nfs_mount_type = -1; 1185#ifndef NFS_NOSERVER 1186 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1187#endif 1188 lease_updatetime = nfs_prev_lease_updatetime; 1189 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1190 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1191 return (0); 1192} 1193 1194/* 1195 * Attribute cache routines. 1196 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1197 * that are on the mbuf list 1198 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1199 * error otherwise 1200 */ 1201 1202/* 1203 * Load the attribute cache (that lives in the nfsnode entry) with 1204 * the values on the mbuf list and 1205 * Iff vap not NULL 1206 * copy the attributes to *vaper 1207 */ 1208int 1209nfs_loadattrcache(vpp, mdp, dposp, vaper) 1210 struct vnode **vpp; 1211 struct mbuf **mdp; 1212 caddr_t *dposp; 1213 struct vattr *vaper; 1214{ 1215 register struct vnode *vp = *vpp; 1216 register struct vattr *vap; 1217 register struct nfs_fattr *fp; 1218 register struct nfsnode *np; 1219 register int32_t t1; 1220 caddr_t cp2; 1221 int error = 0, rdev; 1222 struct mbuf *md; 1223 enum vtype vtyp; 1224 u_short vmode; 1225 struct timespec mtime; 1226 int v3 = NFS_ISV3(vp); 1227 1228 md = *mdp; 1229 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1230 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1231 return (error); 1232 fp = (struct nfs_fattr *)cp2; 1233 if (v3) { 1234 vtyp = nfsv3tov_type(fp->fa_type); 1235 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1236 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1237 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1238 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1239 } else { 1240 vtyp = nfsv2tov_type(fp->fa_type); 1241 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1242 /* 1243 * XXX 1244 * 1245 * The duplicate information returned in fa_type and fa_mode 1246 * is an ambiguity in the NFS version 2 protocol. 1247 * 1248 * VREG should be taken literally as a regular file. If a 1249 * server intents to return some type information differently 1250 * in the upper bits of the mode field (e.g. for sockets, or 1251 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1252 * leave the examination of the mode bits even in the VREG 1253 * case to avoid breakage for bogus servers, but we make sure 1254 * that there are actually type bits set in the upper part of 1255 * fa_mode (and failing that, trust the va_type field). 1256 * 1257 * NFSv3 cleared the issue, and requires fa_mode to not 1258 * contain any type information (while also introduing sockets 1259 * and FIFOs for fa_type). 1260 */ 1261 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1262 vtyp = IFTOVT(vmode); 1263 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1264 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1265 1266 /* 1267 * Really ugly NFSv2 kludge. 1268 */ 1269 if (vtyp == VCHR && rdev == 0xffffffff) 1270 vtyp = VFIFO; 1271 } 1272 1273 /* 1274 * If v_type == VNON it is a new node, so fill in the v_type, 1275 * n_mtime fields. Check to see if it represents a special 1276 * device, and if so, check for a possible alias. Once the 1277 * correct vnode has been obtained, fill in the rest of the 1278 * information. 1279 */ 1280 np = VTONFS(vp); 1281 if (vp->v_type != vtyp) { 1282 vp->v_type = vtyp; 1283 if (vp->v_type == VFIFO) { 1284 vp->v_op = fifo_nfsv2nodeop_p; 1285 } 1286 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1287 vp->v_op = spec_nfsv2nodeop_p; 1288 addaliasu(vp, rdev); 1289 } 1290 np->n_mtime = mtime.tv_sec; 1291 } 1292 vap = &np->n_vattr; 1293 vap->va_type = vtyp; 1294 vap->va_mode = (vmode & 07777); 1295 vap->va_rdev = rdev; 1296 vap->va_mtime = mtime; 1297 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1298 if (v3) { 1299 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1300 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1301 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1302 vap->va_size = fxdr_hyper(&fp->fa3_size); 1303 vap->va_blocksize = NFS_FABLKSIZE; 1304 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1305 vap->va_fileid = fxdr_unsigned(int32_t, 1306 fp->fa3_fileid.nfsuquad[1]); 1307 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1308 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1309 vap->va_flags = 0; 1310 vap->va_filerev = 0; 1311 } else { 1312 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1313 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1314 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1315 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1316 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1317 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1318 * NFS_FABLKSIZE; 1319 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1320 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1321 vap->va_flags = 0; 1322 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1323 fp->fa2_ctime.nfsv2_sec); 1324 vap->va_ctime.tv_nsec = 0; 1325 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1326 vap->va_filerev = 0; 1327 } 1328 if (vap->va_size != np->n_size) { 1329 if (vap->va_type == VREG) { 1330 if (np->n_flag & NMODIFIED) { 1331 if (vap->va_size < np->n_size) 1332 vap->va_size = np->n_size; 1333 else 1334 np->n_size = vap->va_size; 1335 } else { 1336 np->n_size = vap->va_size; 1337 } 1338 vnode_pager_setsize(vp, np->n_size); 1339 } else { 1340 np->n_size = vap->va_size; 1341 } 1342 } 1343 np->n_attrstamp = time_second; 1344 if (vaper != NULL) { 1345 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1346 if (np->n_flag & NCHG) { 1347 if (np->n_flag & NACC) 1348 vaper->va_atime = np->n_atim; 1349 if (np->n_flag & NUPD) 1350 vaper->va_mtime = np->n_mtim; 1351 } 1352 } 1353 return (0); 1354} 1355 1356#ifdef NFS_ACDEBUG 1357#include <sys/sysctl.h> 1358SYSCTL_DECL(_vfs_nfs); 1359static int nfs_acdebug; 1360SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1361#endif 1362 1363/* 1364 * Check the time stamp 1365 * If the cache is valid, copy contents to *vap and return 0 1366 * otherwise return an error 1367 */ 1368int 1369nfs_getattrcache(vp, vaper) 1370 register struct vnode *vp; 1371 struct vattr *vaper; 1372{ 1373 register struct nfsnode *np; 1374 register struct vattr *vap; 1375 struct nfsmount *nmp; 1376 int timeo; 1377 1378 np = VTONFS(vp); 1379 vap = &np->n_vattr; 1380 nmp = VFSTONFS(vp->v_mount); 1381 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1382 timeo = (time_second - np->n_mtime) / 10; 1383 1384#ifdef NFS_ACDEBUG 1385 if (nfs_acdebug>1) 1386 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1387#endif 1388 1389 if (vap->va_type == VDIR) { 1390 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1391 timeo = nmp->nm_acdirmin; 1392 else if (timeo > nmp->nm_acdirmax) 1393 timeo = nmp->nm_acdirmax; 1394 } else { 1395 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1396 timeo = nmp->nm_acregmin; 1397 else if (timeo > nmp->nm_acregmax) 1398 timeo = nmp->nm_acregmax; 1399 } 1400 1401#ifdef NFS_ACDEBUG 1402 if (nfs_acdebug > 2) 1403 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1404 nmp->nm_acregmin, nmp->nm_acregmax, 1405 nmp->nm_acdirmin, nmp->nm_acdirmax); 1406 1407 if (nfs_acdebug) 1408 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1409 (time_second - np->n_attrstamp), timeo); 1410#endif 1411 1412 if ((time_second - np->n_attrstamp) >= timeo) { 1413 nfsstats.attrcache_misses++; 1414 return (ENOENT); 1415 } 1416 nfsstats.attrcache_hits++; 1417 if (vap->va_size != np->n_size) { 1418 if (vap->va_type == VREG) { 1419 if (np->n_flag & NMODIFIED) { 1420 if (vap->va_size < np->n_size) 1421 vap->va_size = np->n_size; 1422 else 1423 np->n_size = vap->va_size; 1424 } else { 1425 np->n_size = vap->va_size; 1426 } 1427 vnode_pager_setsize(vp, np->n_size); 1428 } else { 1429 np->n_size = vap->va_size; 1430 } 1431 } 1432 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1433 if (np->n_flag & NCHG) { 1434 if (np->n_flag & NACC) 1435 vaper->va_atime = np->n_atim; 1436 if (np->n_flag & NUPD) 1437 vaper->va_mtime = np->n_mtim; 1438 } 1439 return (0); 1440} 1441 1442#ifndef NFS_NOSERVER 1443/* 1444 * Set up nameidata for a lookup() call and do it. 1445 * 1446 * If pubflag is set, this call is done for a lookup operation on the 1447 * public filehandle. In that case we allow crossing mountpoints and 1448 * absolute pathnames. However, the caller is expected to check that 1449 * the lookup result is within the public fs, and deny access if 1450 * it is not. 1451 * 1452 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1453 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1454 * error occurs but the parent was not requested. 1455 * 1456 * dirp may be set whether an error is returned or not, and must be 1457 * released by the caller. 1458 */ 1459int 1460nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1461 register struct nameidata *ndp; 1462 fhandle_t *fhp; 1463 int len; 1464 struct nfssvc_sock *slp; 1465 struct sockaddr *nam; 1466 struct mbuf **mdp; 1467 caddr_t *dposp; 1468 struct vnode **retdirp; 1469 struct proc *p; 1470 int kerbflag, pubflag; 1471{ 1472 register int i, rem; 1473 register struct mbuf *md; 1474 register char *fromcp, *tocp, *cp; 1475 struct iovec aiov; 1476 struct uio auio; 1477 struct vnode *dp; 1478 int error, rdonly, linklen; 1479 struct componentname *cnp = &ndp->ni_cnd; 1480 1481 *retdirp = (struct vnode *)0; 1482 cnp->cn_pnbuf = zalloc(namei_zone); 1483 1484 /* 1485 * Copy the name from the mbuf list to ndp->ni_pnbuf 1486 * and set the various ndp fields appropriately. 1487 */ 1488 fromcp = *dposp; 1489 tocp = cnp->cn_pnbuf; 1490 md = *mdp; 1491 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1492 for (i = 0; i < len; i++) { 1493 while (rem == 0) { 1494 md = md->m_next; 1495 if (md == NULL) { 1496 error = EBADRPC; 1497 goto out; 1498 } 1499 fromcp = mtod(md, caddr_t); 1500 rem = md->m_len; 1501 } 1502 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1503 error = EACCES; 1504 goto out; 1505 } 1506 *tocp++ = *fromcp++; 1507 rem--; 1508 } 1509 *tocp = '\0'; 1510 *mdp = md; 1511 *dposp = fromcp; 1512 len = nfsm_rndup(len)-len; 1513 if (len > 0) { 1514 if (rem >= len) 1515 *dposp += len; 1516 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1517 goto out; 1518 } 1519 1520 /* 1521 * Extract and set starting directory. 1522 */ 1523 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1524 nam, &rdonly, kerbflag, pubflag); 1525 if (error) 1526 goto out; 1527 if (dp->v_type != VDIR) { 1528 vrele(dp); 1529 error = ENOTDIR; 1530 goto out; 1531 } 1532 1533 if (rdonly) 1534 cnp->cn_flags |= RDONLY; 1535 1536 /* 1537 * Set return directory. Reference to dp is implicitly transfered 1538 * to the returned pointer 1539 */ 1540 *retdirp = dp; 1541 1542 if (pubflag) { 1543 /* 1544 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1545 * and the 'native path' indicator. 1546 */ 1547 cp = zalloc(namei_zone); 1548 fromcp = cnp->cn_pnbuf; 1549 tocp = cp; 1550 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1551 switch ((unsigned char)*fromcp) { 1552 case WEBNFS_NATIVE_CHAR: 1553 /* 1554 * 'Native' path for us is the same 1555 * as a path according to the NFS spec, 1556 * just skip the escape char. 1557 */ 1558 fromcp++; 1559 break; 1560 /* 1561 * More may be added in the future, range 0x80-0xff 1562 */ 1563 default: 1564 error = EIO; 1565 zfree(namei_zone, cp); 1566 goto out; 1567 } 1568 } 1569 /* 1570 * Translate the '%' escapes, URL-style. 1571 */ 1572 while (*fromcp != '\0') { 1573 if (*fromcp == WEBNFS_ESC_CHAR) { 1574 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1575 fromcp++; 1576 *tocp++ = HEXSTRTOI(fromcp); 1577 fromcp += 2; 1578 continue; 1579 } else { 1580 error = ENOENT; 1581 zfree(namei_zone, cp); 1582 goto out; 1583 } 1584 } else 1585 *tocp++ = *fromcp++; 1586 } 1587 *tocp = '\0'; 1588 zfree(namei_zone, cnp->cn_pnbuf); 1589 cnp->cn_pnbuf = cp; 1590 } 1591 1592 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1593 ndp->ni_segflg = UIO_SYSSPACE; 1594 1595 if (pubflag) { 1596 ndp->ni_rootdir = rootvnode; 1597 ndp->ni_loopcnt = 0; 1598 if (cnp->cn_pnbuf[0] == '/') 1599 dp = rootvnode; 1600 } else { 1601 cnp->cn_flags |= NOCROSSMOUNT; 1602 } 1603 1604 /* 1605 * Initialize for scan, set ni_startdir and bump ref on dp again 1606 * becuase lookup() will dereference ni_startdir. 1607 */ 1608 1609 cnp->cn_proc = p; 1610 VREF(dp); 1611 ndp->ni_startdir = dp; 1612 1613 for (;;) { 1614 cnp->cn_nameptr = cnp->cn_pnbuf; 1615 /* 1616 * Call lookup() to do the real work. If an error occurs, 1617 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1618 * we do not have to dereference anything before returning. 1619 * In either case ni_startdir will be dereferenced and NULLed 1620 * out. 1621 */ 1622 error = lookup(ndp); 1623 if (error) 1624 break; 1625 1626 /* 1627 * Check for encountering a symbolic link. Trivial 1628 * termination occurs if no symlink encountered. 1629 * Note: zfree is safe because error is 0, so we will 1630 * not zfree it again when we break. 1631 */ 1632 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1633 nfsrv_object_create(ndp->ni_vp); 1634 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 1635 cnp->cn_flags |= HASBUF; 1636 else 1637 zfree(namei_zone, cnp->cn_pnbuf); 1638 break; 1639 } 1640 1641 /* 1642 * Validate symlink 1643 */ 1644 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1645 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1646 if (!pubflag) { 1647 error = EINVAL; 1648 goto badlink2; 1649 } 1650 1651 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1652 error = ELOOP; 1653 goto badlink2; 1654 } 1655 if (ndp->ni_pathlen > 1) 1656 cp = zalloc(namei_zone); 1657 else 1658 cp = cnp->cn_pnbuf; 1659 aiov.iov_base = cp; 1660 aiov.iov_len = MAXPATHLEN; 1661 auio.uio_iov = &aiov; 1662 auio.uio_iovcnt = 1; 1663 auio.uio_offset = 0; 1664 auio.uio_rw = UIO_READ; 1665 auio.uio_segflg = UIO_SYSSPACE; 1666 auio.uio_procp = (struct proc *)0; 1667 auio.uio_resid = MAXPATHLEN; 1668 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1669 if (error) { 1670 badlink1: 1671 if (ndp->ni_pathlen > 1) 1672 zfree(namei_zone, cp); 1673 badlink2: 1674 vrele(ndp->ni_dvp); 1675 vput(ndp->ni_vp); 1676 break; 1677 } 1678 linklen = MAXPATHLEN - auio.uio_resid; 1679 if (linklen == 0) { 1680 error = ENOENT; 1681 goto badlink1; 1682 } 1683 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1684 error = ENAMETOOLONG; 1685 goto badlink1; 1686 } 1687 1688 /* 1689 * Adjust or replace path 1690 */ 1691 if (ndp->ni_pathlen > 1) { 1692 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1693 zfree(namei_zone, cnp->cn_pnbuf); 1694 cnp->cn_pnbuf = cp; 1695 } else 1696 cnp->cn_pnbuf[linklen] = '\0'; 1697 ndp->ni_pathlen += linklen; 1698 1699 /* 1700 * Cleanup refs for next loop and check if root directory 1701 * should replace current directory. Normally ni_dvp 1702 * becomes the new base directory and is cleaned up when 1703 * we loop. Explicitly null pointers after invalidation 1704 * to clarify operation. 1705 */ 1706 vput(ndp->ni_vp); 1707 ndp->ni_vp = NULL; 1708 1709 if (cnp->cn_pnbuf[0] == '/') { 1710 vrele(ndp->ni_dvp); 1711 ndp->ni_dvp = ndp->ni_rootdir; 1712 VREF(ndp->ni_dvp); 1713 } 1714 ndp->ni_startdir = ndp->ni_dvp; 1715 ndp->ni_dvp = NULL; 1716 } 1717 1718 /* 1719 * nfs_namei() guarentees that fields will not contain garbage 1720 * whether an error occurs or not. This allows the caller to track 1721 * cleanup state trivially. 1722 */ 1723out: 1724 if (error) { 1725 zfree(namei_zone, cnp->cn_pnbuf); 1726 ndp->ni_vp = NULL; 1727 ndp->ni_dvp = NULL; 1728 ndp->ni_startdir = NULL; 1729 cnp->cn_flags &= ~HASBUF; 1730 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 1731 ndp->ni_dvp = NULL; 1732 } 1733 return (error); 1734} 1735 1736/* 1737 * A fiddled version of m_adj() that ensures null fill to a long 1738 * boundary and only trims off the back end 1739 */ 1740void 1741nfsm_adj(mp, len, nul) 1742 struct mbuf *mp; 1743 register int len; 1744 int nul; 1745{ 1746 register struct mbuf *m; 1747 register int count, i; 1748 register char *cp; 1749 1750 /* 1751 * Trim from tail. Scan the mbuf chain, 1752 * calculating its length and finding the last mbuf. 1753 * If the adjustment only affects this mbuf, then just 1754 * adjust and return. Otherwise, rescan and truncate 1755 * after the remaining size. 1756 */ 1757 count = 0; 1758 m = mp; 1759 for (;;) { 1760 count += m->m_len; 1761 if (m->m_next == (struct mbuf *)0) 1762 break; 1763 m = m->m_next; 1764 } 1765 if (m->m_len > len) { 1766 m->m_len -= len; 1767 if (nul > 0) { 1768 cp = mtod(m, caddr_t)+m->m_len-nul; 1769 for (i = 0; i < nul; i++) 1770 *cp++ = '\0'; 1771 } 1772 return; 1773 } 1774 count -= len; 1775 if (count < 0) 1776 count = 0; 1777 /* 1778 * Correct length for chain is "count". 1779 * Find the mbuf with last data, adjust its length, 1780 * and toss data from remaining mbufs on chain. 1781 */ 1782 for (m = mp; m; m = m->m_next) { 1783 if (m->m_len >= count) { 1784 m->m_len = count; 1785 if (nul > 0) { 1786 cp = mtod(m, caddr_t)+m->m_len-nul; 1787 for (i = 0; i < nul; i++) 1788 *cp++ = '\0'; 1789 } 1790 break; 1791 } 1792 count -= m->m_len; 1793 } 1794 for (m = m->m_next;m;m = m->m_next) 1795 m->m_len = 0; 1796} 1797 1798/* 1799 * Make these functions instead of macros, so that the kernel text size 1800 * doesn't get too big... 1801 */ 1802void 1803nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1804 struct nfsrv_descript *nfsd; 1805 int before_ret; 1806 register struct vattr *before_vap; 1807 int after_ret; 1808 struct vattr *after_vap; 1809 struct mbuf **mbp; 1810 char **bposp; 1811{ 1812 register struct mbuf *mb = *mbp, *mb2; 1813 register char *bpos = *bposp; 1814 register u_int32_t *tl; 1815 1816 if (before_ret) { 1817 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1818 *tl = nfs_false; 1819 } else { 1820 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1821 *tl++ = nfs_true; 1822 txdr_hyper(before_vap->va_size, tl); 1823 tl += 2; 1824 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1825 tl += 2; 1826 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1827 } 1828 *bposp = bpos; 1829 *mbp = mb; 1830 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1831} 1832 1833void 1834nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1835 struct nfsrv_descript *nfsd; 1836 int after_ret; 1837 struct vattr *after_vap; 1838 struct mbuf **mbp; 1839 char **bposp; 1840{ 1841 register struct mbuf *mb = *mbp, *mb2; 1842 register char *bpos = *bposp; 1843 register u_int32_t *tl; 1844 register struct nfs_fattr *fp; 1845 1846 if (after_ret) { 1847 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1848 *tl = nfs_false; 1849 } else { 1850 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1851 *tl++ = nfs_true; 1852 fp = (struct nfs_fattr *)tl; 1853 nfsm_srvfattr(nfsd, after_vap, fp); 1854 } 1855 *mbp = mb; 1856 *bposp = bpos; 1857} 1858 1859void 1860nfsm_srvfattr(nfsd, vap, fp) 1861 register struct nfsrv_descript *nfsd; 1862 register struct vattr *vap; 1863 register struct nfs_fattr *fp; 1864{ 1865 1866 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1867 fp->fa_uid = txdr_unsigned(vap->va_uid); 1868 fp->fa_gid = txdr_unsigned(vap->va_gid); 1869 if (nfsd->nd_flag & ND_NFSV3) { 1870 fp->fa_type = vtonfsv3_type(vap->va_type); 1871 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1872 txdr_hyper(vap->va_size, &fp->fa3_size); 1873 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1874 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1875 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1876 fp->fa3_fsid.nfsuquad[0] = 0; 1877 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1878 fp->fa3_fileid.nfsuquad[0] = 0; 1879 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1880 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1881 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1882 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1883 } else { 1884 fp->fa_type = vtonfsv2_type(vap->va_type); 1885 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1886 fp->fa2_size = txdr_unsigned(vap->va_size); 1887 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1888 if (vap->va_type == VFIFO) 1889 fp->fa2_rdev = 0xffffffff; 1890 else 1891 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1892 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1893 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1894 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1895 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1896 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1897 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1898 } 1899} 1900 1901/* 1902 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1903 * - look up fsid in mount list (if not found ret error) 1904 * - get vp and export rights by calling VFS_FHTOVP() 1905 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1906 * - if not lockflag unlock it with VOP_UNLOCK() 1907 */ 1908int 1909nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1910 fhandle_t *fhp; 1911 int lockflag; 1912 struct vnode **vpp; 1913 struct ucred *cred; 1914 struct nfssvc_sock *slp; 1915 struct sockaddr *nam; 1916 int *rdonlyp; 1917 int kerbflag; 1918 int pubflag; 1919{ 1920 struct proc *p = curproc; /* XXX */ 1921 register struct mount *mp; 1922 register int i; 1923 struct ucred *credanon; 1924 int error, exflags; 1925#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1926 struct sockaddr_int *saddr; 1927#endif 1928 1929 *vpp = (struct vnode *)0; 1930 1931 if (nfs_ispublicfh(fhp)) { 1932 if (!pubflag || !nfs_pub.np_valid) 1933 return (ESTALE); 1934 fhp = &nfs_pub.np_handle; 1935 } 1936 1937 mp = vfs_getvfs(&fhp->fh_fsid); 1938 if (!mp) 1939 return (ESTALE); 1940 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1941 if (error) 1942 return (error); 1943 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1944 if (error) 1945 return (error); 1946#ifdef MNT_EXNORESPORT 1947 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1948 saddr = (struct sockaddr_in *)nam; 1949 if (saddr->sin_family == AF_INET && 1950 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1951 vput(*vpp); 1952 *vpp = NULL; 1953 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1954 } 1955 } 1956#endif 1957 /* 1958 * Check/setup credentials. 1959 */ 1960 if (exflags & MNT_EXKERB) { 1961 if (!kerbflag) { 1962 vput(*vpp); 1963 *vpp = NULL; 1964 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1965 } 1966 } else if (kerbflag) { 1967 vput(*vpp); 1968 *vpp = NULL; 1969 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1970 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1971 cred->cr_uid = credanon->cr_uid; 1972 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1973 cred->cr_groups[i] = credanon->cr_groups[i]; 1974 cred->cr_ngroups = i; 1975 } 1976 if (exflags & MNT_EXRDONLY) 1977 *rdonlyp = 1; 1978 else 1979 *rdonlyp = 0; 1980 1981 nfsrv_object_create(*vpp); 1982 1983 if (!lockflag) 1984 VOP_UNLOCK(*vpp, 0, p); 1985 return (0); 1986} 1987 1988 1989/* 1990 * WebNFS: check if a filehandle is a public filehandle. For v3, this 1991 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 1992 * transformed this to all zeroes in both cases, so check for it. 1993 */ 1994int 1995nfs_ispublicfh(fhp) 1996 fhandle_t *fhp; 1997{ 1998 char *cp = (char *)fhp; 1999 int i; 2000 2001 for (i = 0; i < NFSX_V3FH; i++) 2002 if (*cp++ != 0) 2003 return (FALSE); 2004 return (TRUE); 2005} 2006 2007#endif /* NFS_NOSERVER */ 2008/* 2009 * This function compares two net addresses by family and returns TRUE 2010 * if they are the same host. 2011 * If there is any doubt, return FALSE. 2012 * The AF_INET family is handled as a special case so that address mbufs 2013 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2014 */ 2015int 2016netaddr_match(family, haddr, nam) 2017 int family; 2018 union nethostaddr *haddr; 2019 struct sockaddr *nam; 2020{ 2021 register struct sockaddr_in *inetaddr; 2022 2023 switch (family) { 2024 case AF_INET: 2025 inetaddr = (struct sockaddr_in *)nam; 2026 if (inetaddr->sin_family == AF_INET && 2027 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2028 return (1); 2029 break; 2030#ifdef ISO 2031 case AF_ISO: 2032 { 2033 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2034 2035 isoaddr1 = (struct sockaddr_iso *)nam; 2036 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2037 if (isoaddr1->siso_family == AF_ISO && 2038 isoaddr1->siso_nlen > 0 && 2039 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2040 SAME_ISOADDR(isoaddr1, isoaddr2)) 2041 return (1); 2042 break; 2043 } 2044#endif /* ISO */ 2045 default: 2046 break; 2047 }; 2048 return (0); 2049} 2050 2051static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 2052/* 2053 * This function finds the directory cookie that corresponds to the 2054 * logical byte offset given. 2055 */ 2056nfsuint64 * 2057nfs_getcookie(np, off, add) 2058 register struct nfsnode *np; 2059 off_t off; 2060 int add; 2061{ 2062 register struct nfsdmap *dp, *dp2; 2063 register int pos; 2064 2065 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2066 if (pos == 0 || off < 0) { 2067#ifdef DIAGNOSTIC 2068 if (add) 2069 panic("nfs getcookie add at <= 0"); 2070#endif 2071 return (&nfs_nullcookie); 2072 } 2073 pos--; 2074 dp = np->n_cookies.lh_first; 2075 if (!dp) { 2076 if (add) { 2077 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2078 M_NFSDIROFF, M_WAITOK); 2079 dp->ndm_eocookie = 0; 2080 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2081 } else 2082 return ((nfsuint64 *)0); 2083 } 2084 while (pos >= NFSNUMCOOKIES) { 2085 pos -= NFSNUMCOOKIES; 2086 if (dp->ndm_list.le_next) { 2087 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2088 pos >= dp->ndm_eocookie) 2089 return ((nfsuint64 *)0); 2090 dp = dp->ndm_list.le_next; 2091 } else if (add) { 2092 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2093 M_NFSDIROFF, M_WAITOK); 2094 dp2->ndm_eocookie = 0; 2095 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2096 dp = dp2; 2097 } else 2098 return ((nfsuint64 *)0); 2099 } 2100 if (pos >= dp->ndm_eocookie) { 2101 if (add) 2102 dp->ndm_eocookie = pos + 1; 2103 else 2104 return ((nfsuint64 *)0); 2105 } 2106 return (&dp->ndm_cookies[pos]); 2107} 2108 2109/* 2110 * Invalidate cached directory information, except for the actual directory 2111 * blocks (which are invalidated separately). 2112 * Done mainly to avoid the use of stale offset cookies. 2113 */ 2114void 2115nfs_invaldir(vp) 2116 register struct vnode *vp; 2117{ 2118 register struct nfsnode *np = VTONFS(vp); 2119 2120#ifdef DIAGNOSTIC 2121 if (vp->v_type != VDIR) 2122 panic("nfs: invaldir not dir"); 2123#endif 2124 np->n_direofoffset = 0; 2125 np->n_cookieverf.nfsuquad[0] = 0; 2126 np->n_cookieverf.nfsuquad[1] = 0; 2127 if (np->n_cookies.lh_first) 2128 np->n_cookies.lh_first->ndm_eocookie = 0; 2129} 2130 2131/* 2132 * The write verifier has changed (probably due to a server reboot), so all 2133 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2134 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2135 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the 2136 * mount point. 2137 * 2138 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data 2139 * writes are not clusterable. 2140 */ 2141void 2142nfs_clearcommit(mp) 2143 struct mount *mp; 2144{ 2145 register struct vnode *vp, *nvp; 2146 register struct buf *bp, *nbp; 2147 int s; 2148 2149 s = splbio(); 2150loop: 2151 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2152 if (vp->v_mount != mp) /* Paranoia */ 2153 goto loop; 2154 nvp = vp->v_mntvnodes.le_next; 2155 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2156 nbp = TAILQ_NEXT(bp, b_vnbufs); 2157 if (BUF_REFCNT(bp) == 0 && 2158 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2159 == (B_DELWRI | B_NEEDCOMMIT)) 2160 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); 2161 } 2162 } 2163 splx(s); 2164} 2165 2166#ifndef NFS_NOSERVER 2167/* 2168 * Map errnos to NFS error numbers. For Version 3 also filter out error 2169 * numbers not specified for the associated procedure. 2170 */ 2171int 2172nfsrv_errmap(nd, err) 2173 struct nfsrv_descript *nd; 2174 register int err; 2175{ 2176 register short *defaulterrp, *errp; 2177 2178 if (nd->nd_flag & ND_NFSV3) { 2179 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2180 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2181 while (*++errp) { 2182 if (*errp == err) 2183 return (err); 2184 else if (*errp > err) 2185 break; 2186 } 2187 return ((int)*defaulterrp); 2188 } else 2189 return (err & 0xffff); 2190 } 2191 if (err <= ELAST) 2192 return ((int)nfsrv_v2errmap[err - 1]); 2193 return (NFSERR_IO); 2194} 2195 2196int 2197nfsrv_object_create(vp) 2198 struct vnode *vp; 2199{ 2200 2201 if (vp == NULL || vp->v_type != VREG) 2202 return (1); 2203 return (vfs_object_create(vp, curproc, 2204 curproc ? curproc->p_ucred : NULL)); 2205} 2206 2207/* 2208 * Sort the group list in increasing numerical order. 2209 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2210 * that used to be here.) 2211 */ 2212void 2213nfsrvw_sort(list, num) 2214 register gid_t *list; 2215 register int num; 2216{ 2217 register int i, j; 2218 gid_t v; 2219 2220 /* Insertion sort. */ 2221 for (i = 1; i < num; i++) { 2222 v = list[i]; 2223 /* find correct slot for value v, moving others up */ 2224 for (j = i; --j >= 0 && v < list[j];) 2225 list[j + 1] = list[j]; 2226 list[j + 1] = v; 2227 } 2228} 2229 2230/* 2231 * copy credentials making sure that the result can be compared with bcmp(). 2232 */ 2233void 2234nfsrv_setcred(incred, outcred) 2235 register struct ucred *incred, *outcred; 2236{ 2237 register int i; 2238 2239 bzero((caddr_t)outcred, sizeof (struct ucred)); 2240 outcred->cr_ref = 1; 2241 outcred->cr_uid = incred->cr_uid; 2242 outcred->cr_ngroups = incred->cr_ngroups; 2243 for (i = 0; i < incred->cr_ngroups; i++) 2244 outcred->cr_groups[i] = incred->cr_groups[i]; 2245 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2246} 2247#endif /* NFS_NOSERVER */ 2248