nfs_srvsubs.c revision 48274
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 37 * $Id: nfs_subs.c,v 1.77 1999/06/26 02:46:30 mckusick Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/buf.h> 49#include <sys/proc.h> 50#include <sys/mount.h> 51#include <sys/vnode.h> 52#include <sys/namei.h> 53#include <sys/mbuf.h> 54#include <sys/socket.h> 55#include <sys/stat.h> 56#include <sys/malloc.h> 57#include <sys/sysent.h> 58#include <sys/syscall.h> 59 60#include <vm/vm.h> 61#include <vm/vm_object.h> 62#include <vm/vm_extern.h> 63#include <vm/vm_zone.h> 64 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <nfs/nfsnode.h> 69#include <nfs/xdr_subs.h> 70#include <nfs/nfsm_subs.h> 71#include <nfs/nfsmount.h> 72#include <nfs/nqnfs.h> 73#include <nfs/nfsrtt.h> 74 75#include <miscfs/specfs/specdev.h> 76 77#include <netinet/in.h> 78#ifdef ISO 79#include <netiso/iso.h> 80#endif 81 82/* 83 * Data items converted to xdr at startup, since they are constant 84 * This is kinda hokey, but may save a little time doing byte swaps 85 */ 86u_int32_t nfs_xdrneg1; 87u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 89 rpc_auth_kerb; 90u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; 91 92/* And other global data */ 93static u_int32_t nfs_xid = 0; 94static enum vtype nv2tov_type[8]= { 95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 96}; 97enum vtype nv3tov_type[8]= { 98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 99}; 100 101int nfs_ticks; 102int nfs_pbuf_freecnt = -1; /* start out unlimited */ 103 104struct nfs_reqq nfs_reqq; 105struct nfssvc_sockhead nfssvc_sockhead; 106int nfssvc_sockhead_flag; 107struct nfsd_head nfsd_head; 108int nfsd_head_flag; 109struct nfs_bufq nfs_bufq; 110struct nqtimerhead nqtimerhead; 111struct nqfhhashhead *nqfhhashtbl; 112u_long nqfhhash; 113 114static void (*nfs_prev_lease_updatetime) __P((int)); 115static int nfs_prev_nfssvc_sy_narg; 116static sy_call_t *nfs_prev_nfssvc_sy_call; 117 118#ifndef NFS_NOSERVER 119 120static vop_t *nfs_prev_vop_lease_check; 121static int nfs_prev_getfh_sy_narg; 122static sy_call_t *nfs_prev_getfh_sy_call; 123 124/* 125 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 126 */ 127int nfsv3_procid[NFS_NPROCS] = { 128 NFSPROC_NULL, 129 NFSPROC_GETATTR, 130 NFSPROC_SETATTR, 131 NFSPROC_NOOP, 132 NFSPROC_LOOKUP, 133 NFSPROC_READLINK, 134 NFSPROC_READ, 135 NFSPROC_NOOP, 136 NFSPROC_WRITE, 137 NFSPROC_CREATE, 138 NFSPROC_REMOVE, 139 NFSPROC_RENAME, 140 NFSPROC_LINK, 141 NFSPROC_SYMLINK, 142 NFSPROC_MKDIR, 143 NFSPROC_RMDIR, 144 NFSPROC_READDIR, 145 NFSPROC_FSSTAT, 146 NFSPROC_NOOP, 147 NFSPROC_NOOP, 148 NFSPROC_NOOP, 149 NFSPROC_NOOP, 150 NFSPROC_NOOP, 151 NFSPROC_NOOP, 152 NFSPROC_NOOP, 153 NFSPROC_NOOP 154}; 155 156#endif /* NFS_NOSERVER */ 157/* 158 * and the reverse mapping from generic to Version 2 procedure numbers 159 */ 160int nfsv2_procid[NFS_NPROCS] = { 161 NFSV2PROC_NULL, 162 NFSV2PROC_GETATTR, 163 NFSV2PROC_SETATTR, 164 NFSV2PROC_LOOKUP, 165 NFSV2PROC_NOOP, 166 NFSV2PROC_READLINK, 167 NFSV2PROC_READ, 168 NFSV2PROC_WRITE, 169 NFSV2PROC_CREATE, 170 NFSV2PROC_MKDIR, 171 NFSV2PROC_SYMLINK, 172 NFSV2PROC_CREATE, 173 NFSV2PROC_REMOVE, 174 NFSV2PROC_RMDIR, 175 NFSV2PROC_RENAME, 176 NFSV2PROC_LINK, 177 NFSV2PROC_READDIR, 178 NFSV2PROC_NOOP, 179 NFSV2PROC_STATFS, 180 NFSV2PROC_NOOP, 181 NFSV2PROC_NOOP, 182 NFSV2PROC_NOOP, 183 NFSV2PROC_NOOP, 184 NFSV2PROC_NOOP, 185 NFSV2PROC_NOOP, 186 NFSV2PROC_NOOP, 187}; 188 189#ifndef NFS_NOSERVER 190/* 191 * Maps errno values to nfs error numbers. 192 * Use NFSERR_IO as the catch all for ones not specifically defined in 193 * RFC 1094. 194 */ 195static u_char nfsrv_v2errmap[ELAST] = { 196 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 200 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 203 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 208 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 209 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 210 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 211 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 212 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 213 NFSERR_IO /* << Last is 86 */ 214}; 215 216/* 217 * Maps errno values to nfs error numbers. 218 * Although it is not obvious whether or not NFS clients really care if 219 * a returned error value is in the specified list for the procedure, the 220 * safest thing to do is filter them appropriately. For Version 2, the 221 * X/Open XNFS document is the only specification that defines error values 222 * for each RPC (The RFC simply lists all possible error values for all RPCs), 223 * so I have decided to not do this for Version 2. 224 * The first entry is the default error return and the rest are the valid 225 * errors for that RPC in increasing numeric order. 226 */ 227static short nfsv3err_null[] = { 228 0, 229 0, 230}; 231 232static short nfsv3err_getattr[] = { 233 NFSERR_IO, 234 NFSERR_IO, 235 NFSERR_STALE, 236 NFSERR_BADHANDLE, 237 NFSERR_SERVERFAULT, 238 0, 239}; 240 241static short nfsv3err_setattr[] = { 242 NFSERR_IO, 243 NFSERR_PERM, 244 NFSERR_IO, 245 NFSERR_ACCES, 246 NFSERR_INVAL, 247 NFSERR_NOSPC, 248 NFSERR_ROFS, 249 NFSERR_DQUOT, 250 NFSERR_STALE, 251 NFSERR_BADHANDLE, 252 NFSERR_NOT_SYNC, 253 NFSERR_SERVERFAULT, 254 0, 255}; 256 257static short nfsv3err_lookup[] = { 258 NFSERR_IO, 259 NFSERR_NOENT, 260 NFSERR_IO, 261 NFSERR_ACCES, 262 NFSERR_NOTDIR, 263 NFSERR_NAMETOL, 264 NFSERR_STALE, 265 NFSERR_BADHANDLE, 266 NFSERR_SERVERFAULT, 267 0, 268}; 269 270static short nfsv3err_access[] = { 271 NFSERR_IO, 272 NFSERR_IO, 273 NFSERR_STALE, 274 NFSERR_BADHANDLE, 275 NFSERR_SERVERFAULT, 276 0, 277}; 278 279static short nfsv3err_readlink[] = { 280 NFSERR_IO, 281 NFSERR_IO, 282 NFSERR_ACCES, 283 NFSERR_INVAL, 284 NFSERR_STALE, 285 NFSERR_BADHANDLE, 286 NFSERR_NOTSUPP, 287 NFSERR_SERVERFAULT, 288 0, 289}; 290 291static short nfsv3err_read[] = { 292 NFSERR_IO, 293 NFSERR_IO, 294 NFSERR_NXIO, 295 NFSERR_ACCES, 296 NFSERR_INVAL, 297 NFSERR_STALE, 298 NFSERR_BADHANDLE, 299 NFSERR_SERVERFAULT, 300 0, 301}; 302 303static short nfsv3err_write[] = { 304 NFSERR_IO, 305 NFSERR_IO, 306 NFSERR_ACCES, 307 NFSERR_INVAL, 308 NFSERR_FBIG, 309 NFSERR_NOSPC, 310 NFSERR_ROFS, 311 NFSERR_DQUOT, 312 NFSERR_STALE, 313 NFSERR_BADHANDLE, 314 NFSERR_SERVERFAULT, 315 0, 316}; 317 318static short nfsv3err_create[] = { 319 NFSERR_IO, 320 NFSERR_IO, 321 NFSERR_ACCES, 322 NFSERR_EXIST, 323 NFSERR_NOTDIR, 324 NFSERR_NOSPC, 325 NFSERR_ROFS, 326 NFSERR_NAMETOL, 327 NFSERR_DQUOT, 328 NFSERR_STALE, 329 NFSERR_BADHANDLE, 330 NFSERR_NOTSUPP, 331 NFSERR_SERVERFAULT, 332 0, 333}; 334 335static short nfsv3err_mkdir[] = { 336 NFSERR_IO, 337 NFSERR_IO, 338 NFSERR_ACCES, 339 NFSERR_EXIST, 340 NFSERR_NOTDIR, 341 NFSERR_NOSPC, 342 NFSERR_ROFS, 343 NFSERR_NAMETOL, 344 NFSERR_DQUOT, 345 NFSERR_STALE, 346 NFSERR_BADHANDLE, 347 NFSERR_NOTSUPP, 348 NFSERR_SERVERFAULT, 349 0, 350}; 351 352static short nfsv3err_symlink[] = { 353 NFSERR_IO, 354 NFSERR_IO, 355 NFSERR_ACCES, 356 NFSERR_EXIST, 357 NFSERR_NOTDIR, 358 NFSERR_NOSPC, 359 NFSERR_ROFS, 360 NFSERR_NAMETOL, 361 NFSERR_DQUOT, 362 NFSERR_STALE, 363 NFSERR_BADHANDLE, 364 NFSERR_NOTSUPP, 365 NFSERR_SERVERFAULT, 366 0, 367}; 368 369static short nfsv3err_mknod[] = { 370 NFSERR_IO, 371 NFSERR_IO, 372 NFSERR_ACCES, 373 NFSERR_EXIST, 374 NFSERR_NOTDIR, 375 NFSERR_NOSPC, 376 NFSERR_ROFS, 377 NFSERR_NAMETOL, 378 NFSERR_DQUOT, 379 NFSERR_STALE, 380 NFSERR_BADHANDLE, 381 NFSERR_NOTSUPP, 382 NFSERR_SERVERFAULT, 383 NFSERR_BADTYPE, 384 0, 385}; 386 387static short nfsv3err_remove[] = { 388 NFSERR_IO, 389 NFSERR_NOENT, 390 NFSERR_IO, 391 NFSERR_ACCES, 392 NFSERR_NOTDIR, 393 NFSERR_ROFS, 394 NFSERR_NAMETOL, 395 NFSERR_STALE, 396 NFSERR_BADHANDLE, 397 NFSERR_SERVERFAULT, 398 0, 399}; 400 401static short nfsv3err_rmdir[] = { 402 NFSERR_IO, 403 NFSERR_NOENT, 404 NFSERR_IO, 405 NFSERR_ACCES, 406 NFSERR_EXIST, 407 NFSERR_NOTDIR, 408 NFSERR_INVAL, 409 NFSERR_ROFS, 410 NFSERR_NAMETOL, 411 NFSERR_NOTEMPTY, 412 NFSERR_STALE, 413 NFSERR_BADHANDLE, 414 NFSERR_NOTSUPP, 415 NFSERR_SERVERFAULT, 416 0, 417}; 418 419static short nfsv3err_rename[] = { 420 NFSERR_IO, 421 NFSERR_NOENT, 422 NFSERR_IO, 423 NFSERR_ACCES, 424 NFSERR_EXIST, 425 NFSERR_XDEV, 426 NFSERR_NOTDIR, 427 NFSERR_ISDIR, 428 NFSERR_INVAL, 429 NFSERR_NOSPC, 430 NFSERR_ROFS, 431 NFSERR_MLINK, 432 NFSERR_NAMETOL, 433 NFSERR_NOTEMPTY, 434 NFSERR_DQUOT, 435 NFSERR_STALE, 436 NFSERR_BADHANDLE, 437 NFSERR_NOTSUPP, 438 NFSERR_SERVERFAULT, 439 0, 440}; 441 442static short nfsv3err_link[] = { 443 NFSERR_IO, 444 NFSERR_IO, 445 NFSERR_ACCES, 446 NFSERR_EXIST, 447 NFSERR_XDEV, 448 NFSERR_NOTDIR, 449 NFSERR_INVAL, 450 NFSERR_NOSPC, 451 NFSERR_ROFS, 452 NFSERR_MLINK, 453 NFSERR_NAMETOL, 454 NFSERR_DQUOT, 455 NFSERR_STALE, 456 NFSERR_BADHANDLE, 457 NFSERR_NOTSUPP, 458 NFSERR_SERVERFAULT, 459 0, 460}; 461 462static short nfsv3err_readdir[] = { 463 NFSERR_IO, 464 NFSERR_IO, 465 NFSERR_ACCES, 466 NFSERR_NOTDIR, 467 NFSERR_STALE, 468 NFSERR_BADHANDLE, 469 NFSERR_BAD_COOKIE, 470 NFSERR_TOOSMALL, 471 NFSERR_SERVERFAULT, 472 0, 473}; 474 475static short nfsv3err_readdirplus[] = { 476 NFSERR_IO, 477 NFSERR_IO, 478 NFSERR_ACCES, 479 NFSERR_NOTDIR, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_BAD_COOKIE, 483 NFSERR_NOTSUPP, 484 NFSERR_TOOSMALL, 485 NFSERR_SERVERFAULT, 486 0, 487}; 488 489static short nfsv3err_fsstat[] = { 490 NFSERR_IO, 491 NFSERR_IO, 492 NFSERR_STALE, 493 NFSERR_BADHANDLE, 494 NFSERR_SERVERFAULT, 495 0, 496}; 497 498static short nfsv3err_fsinfo[] = { 499 NFSERR_STALE, 500 NFSERR_STALE, 501 NFSERR_BADHANDLE, 502 NFSERR_SERVERFAULT, 503 0, 504}; 505 506static short nfsv3err_pathconf[] = { 507 NFSERR_STALE, 508 NFSERR_STALE, 509 NFSERR_BADHANDLE, 510 NFSERR_SERVERFAULT, 511 0, 512}; 513 514static short nfsv3err_commit[] = { 515 NFSERR_IO, 516 NFSERR_IO, 517 NFSERR_STALE, 518 NFSERR_BADHANDLE, 519 NFSERR_SERVERFAULT, 520 0, 521}; 522 523static short *nfsrv_v3errmap[] = { 524 nfsv3err_null, 525 nfsv3err_getattr, 526 nfsv3err_setattr, 527 nfsv3err_lookup, 528 nfsv3err_access, 529 nfsv3err_readlink, 530 nfsv3err_read, 531 nfsv3err_write, 532 nfsv3err_create, 533 nfsv3err_mkdir, 534 nfsv3err_symlink, 535 nfsv3err_mknod, 536 nfsv3err_remove, 537 nfsv3err_rmdir, 538 nfsv3err_rename, 539 nfsv3err_link, 540 nfsv3err_readdir, 541 nfsv3err_readdirplus, 542 nfsv3err_fsstat, 543 nfsv3err_fsinfo, 544 nfsv3err_pathconf, 545 nfsv3err_commit, 546}; 547 548#endif /* NFS_NOSERVER */ 549 550extern struct nfsrtt nfsrtt; 551extern time_t nqnfsstarttime; 552extern int nqsrv_clockskew; 553extern int nqsrv_writeslack; 554extern int nqsrv_maxlease; 555extern struct nfsstats nfsstats; 556extern int nqnfs_piggy[NFS_NPROCS]; 557extern nfstype nfsv2_type[9]; 558extern nfstype nfsv3_type[9]; 559extern struct nfsnodehashhead *nfsnodehashtbl; 560extern u_long nfsnodehash; 561 562struct getfh_args; 563extern int getfh(struct proc *, struct getfh_args *, int *); 564struct nfssvc_args; 565extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 566 567LIST_HEAD(nfsnodehashhead, nfsnode); 568 569int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 570 571u_quad_t 572nfs_curusec() 573{ 574 struct timeval tv; 575 576 getmicrotime(&tv); 577 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); 578} 579 580/* 581 * Create the header for an rpc request packet 582 * The hsiz is the size of the rest of the nfs request header. 583 * (just used to decide if a cluster is a good idea) 584 */ 585struct mbuf * 586nfsm_reqh(vp, procid, hsiz, bposp) 587 struct vnode *vp; 588 u_long procid; 589 int hsiz; 590 caddr_t *bposp; 591{ 592 register struct mbuf *mb; 593 register u_int32_t *tl; 594 register caddr_t bpos; 595 struct mbuf *mb2; 596 struct nfsmount *nmp; 597 int nqflag; 598 599 MGET(mb, M_WAIT, MT_DATA); 600 if (hsiz >= MINCLSIZE) 601 MCLGET(mb, M_WAIT); 602 mb->m_len = 0; 603 bpos = mtod(mb, caddr_t); 604 605 /* 606 * For NQNFS, add lease request. 607 */ 608 if (vp) { 609 nmp = VFSTONFS(vp->v_mount); 610 if (nmp->nm_flag & NFSMNT_NQNFS) { 611 nqflag = NQNFS_NEEDLEASE(vp, procid); 612 if (nqflag) { 613 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 614 *tl++ = txdr_unsigned(nqflag); 615 *tl = txdr_unsigned(nmp->nm_leaseterm); 616 } else { 617 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 618 *tl = 0; 619 } 620 } 621 } 622 /* Finally, return values */ 623 *bposp = bpos; 624 return (mb); 625} 626 627/* 628 * Build the RPC header and fill in the authorization info. 629 * The authorization string argument is only used when the credentials 630 * come from outside of the kernel. 631 * Returns the head of the mbuf list. 632 */ 633struct mbuf * 634nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 635 verf_str, mrest, mrest_len, mbp, xidp) 636 register struct ucred *cr; 637 int nmflag; 638 int procid; 639 int auth_type; 640 int auth_len; 641 char *auth_str; 642 int verf_len; 643 char *verf_str; 644 struct mbuf *mrest; 645 int mrest_len; 646 struct mbuf **mbp; 647 u_int32_t *xidp; 648{ 649 register struct mbuf *mb; 650 register u_int32_t *tl; 651 register caddr_t bpos; 652 register int i; 653 struct mbuf *mreq, *mb2; 654 int siz, grpsiz, authsiz; 655 656 authsiz = nfsm_rndup(auth_len); 657 MGETHDR(mb, M_WAIT, MT_DATA); 658 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 659 MCLGET(mb, M_WAIT); 660 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 661 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 662 } else { 663 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 664 } 665 mb->m_len = 0; 666 mreq = mb; 667 bpos = mtod(mb, caddr_t); 668 669 /* 670 * First the RPC header. 671 */ 672 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 673 674 /* Get a pretty random xid to start with */ 675 if (!nfs_xid) 676 nfs_xid = random(); 677 /* 678 * Skip zero xid if it should ever happen. 679 */ 680 if (++nfs_xid == 0) 681 nfs_xid++; 682 683 *tl++ = *xidp = txdr_unsigned(nfs_xid); 684 *tl++ = rpc_call; 685 *tl++ = rpc_vers; 686 if (nmflag & NFSMNT_NQNFS) { 687 *tl++ = txdr_unsigned(NQNFS_PROG); 688 *tl++ = txdr_unsigned(NQNFS_VER3); 689 } else { 690 *tl++ = txdr_unsigned(NFS_PROG); 691 if (nmflag & NFSMNT_NFSV3) 692 *tl++ = txdr_unsigned(NFS_VER3); 693 else 694 *tl++ = txdr_unsigned(NFS_VER2); 695 } 696 if (nmflag & NFSMNT_NFSV3) 697 *tl++ = txdr_unsigned(procid); 698 else 699 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 700 701 /* 702 * And then the authorization cred. 703 */ 704 *tl++ = txdr_unsigned(auth_type); 705 *tl = txdr_unsigned(authsiz); 706 switch (auth_type) { 707 case RPCAUTH_UNIX: 708 nfsm_build(tl, u_int32_t *, auth_len); 709 *tl++ = 0; /* stamp ?? */ 710 *tl++ = 0; /* NULL hostname */ 711 *tl++ = txdr_unsigned(cr->cr_uid); 712 *tl++ = txdr_unsigned(cr->cr_groups[0]); 713 grpsiz = (auth_len >> 2) - 5; 714 *tl++ = txdr_unsigned(grpsiz); 715 for (i = 1; i <= grpsiz; i++) 716 *tl++ = txdr_unsigned(cr->cr_groups[i]); 717 break; 718 case RPCAUTH_KERB4: 719 siz = auth_len; 720 while (siz > 0) { 721 if (M_TRAILINGSPACE(mb) == 0) { 722 MGET(mb2, M_WAIT, MT_DATA); 723 if (siz >= MINCLSIZE) 724 MCLGET(mb2, M_WAIT); 725 mb->m_next = mb2; 726 mb = mb2; 727 mb->m_len = 0; 728 bpos = mtod(mb, caddr_t); 729 } 730 i = min(siz, M_TRAILINGSPACE(mb)); 731 bcopy(auth_str, bpos, i); 732 mb->m_len += i; 733 auth_str += i; 734 bpos += i; 735 siz -= i; 736 } 737 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 738 for (i = 0; i < siz; i++) 739 *bpos++ = '\0'; 740 mb->m_len += siz; 741 } 742 break; 743 }; 744 745 /* 746 * And the verifier... 747 */ 748 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 749 if (verf_str) { 750 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 751 *tl = txdr_unsigned(verf_len); 752 siz = verf_len; 753 while (siz > 0) { 754 if (M_TRAILINGSPACE(mb) == 0) { 755 MGET(mb2, M_WAIT, MT_DATA); 756 if (siz >= MINCLSIZE) 757 MCLGET(mb2, M_WAIT); 758 mb->m_next = mb2; 759 mb = mb2; 760 mb->m_len = 0; 761 bpos = mtod(mb, caddr_t); 762 } 763 i = min(siz, M_TRAILINGSPACE(mb)); 764 bcopy(verf_str, bpos, i); 765 mb->m_len += i; 766 verf_str += i; 767 bpos += i; 768 siz -= i; 769 } 770 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 771 for (i = 0; i < siz; i++) 772 *bpos++ = '\0'; 773 mb->m_len += siz; 774 } 775 } else { 776 *tl++ = txdr_unsigned(RPCAUTH_NULL); 777 *tl = 0; 778 } 779 mb->m_next = mrest; 780 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 781 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 782 *mbp = mb; 783 return (mreq); 784} 785 786/* 787 * copies mbuf chain to the uio scatter/gather list 788 */ 789int 790nfsm_mbuftouio(mrep, uiop, siz, dpos) 791 struct mbuf **mrep; 792 register struct uio *uiop; 793 int siz; 794 caddr_t *dpos; 795{ 796 register char *mbufcp, *uiocp; 797 register int xfer, left, len; 798 register struct mbuf *mp; 799 long uiosiz, rem; 800 int error = 0; 801 802 mp = *mrep; 803 mbufcp = *dpos; 804 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 805 rem = nfsm_rndup(siz)-siz; 806 while (siz > 0) { 807 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 808 return (EFBIG); 809 left = uiop->uio_iov->iov_len; 810 uiocp = uiop->uio_iov->iov_base; 811 if (left > siz) 812 left = siz; 813 uiosiz = left; 814 while (left > 0) { 815 while (len == 0) { 816 mp = mp->m_next; 817 if (mp == NULL) 818 return (EBADRPC); 819 mbufcp = mtod(mp, caddr_t); 820 len = mp->m_len; 821 } 822 xfer = (left > len) ? len : left; 823#ifdef notdef 824 /* Not Yet.. */ 825 if (uiop->uio_iov->iov_op != NULL) 826 (*(uiop->uio_iov->iov_op)) 827 (mbufcp, uiocp, xfer); 828 else 829#endif 830 if (uiop->uio_segflg == UIO_SYSSPACE) 831 bcopy(mbufcp, uiocp, xfer); 832 else 833 copyout(mbufcp, uiocp, xfer); 834 left -= xfer; 835 len -= xfer; 836 mbufcp += xfer; 837 uiocp += xfer; 838 uiop->uio_offset += xfer; 839 uiop->uio_resid -= xfer; 840 } 841 if (uiop->uio_iov->iov_len <= siz) { 842 uiop->uio_iovcnt--; 843 uiop->uio_iov++; 844 } else { 845 uiop->uio_iov->iov_base += uiosiz; 846 uiop->uio_iov->iov_len -= uiosiz; 847 } 848 siz -= uiosiz; 849 } 850 *dpos = mbufcp; 851 *mrep = mp; 852 if (rem > 0) { 853 if (len < rem) 854 error = nfs_adv(mrep, dpos, rem, len); 855 else 856 *dpos += rem; 857 } 858 return (error); 859} 860 861/* 862 * copies a uio scatter/gather list to an mbuf chain. 863 * NOTE: can ony handle iovcnt == 1 864 */ 865int 866nfsm_uiotombuf(uiop, mq, siz, bpos) 867 register struct uio *uiop; 868 struct mbuf **mq; 869 int siz; 870 caddr_t *bpos; 871{ 872 register char *uiocp; 873 register struct mbuf *mp, *mp2; 874 register int xfer, left, mlen; 875 int uiosiz, clflg, rem; 876 char *cp; 877 878#ifdef DIAGNOSTIC 879 if (uiop->uio_iovcnt != 1) 880 panic("nfsm_uiotombuf: iovcnt != 1"); 881#endif 882 883 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 884 clflg = 1; 885 else 886 clflg = 0; 887 rem = nfsm_rndup(siz)-siz; 888 mp = mp2 = *mq; 889 while (siz > 0) { 890 left = uiop->uio_iov->iov_len; 891 uiocp = uiop->uio_iov->iov_base; 892 if (left > siz) 893 left = siz; 894 uiosiz = left; 895 while (left > 0) { 896 mlen = M_TRAILINGSPACE(mp); 897 if (mlen == 0) { 898 MGET(mp, M_WAIT, MT_DATA); 899 if (clflg) 900 MCLGET(mp, M_WAIT); 901 mp->m_len = 0; 902 mp2->m_next = mp; 903 mp2 = mp; 904 mlen = M_TRAILINGSPACE(mp); 905 } 906 xfer = (left > mlen) ? mlen : left; 907#ifdef notdef 908 /* Not Yet.. */ 909 if (uiop->uio_iov->iov_op != NULL) 910 (*(uiop->uio_iov->iov_op)) 911 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 912 else 913#endif 914 if (uiop->uio_segflg == UIO_SYSSPACE) 915 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 916 else 917 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 918 mp->m_len += xfer; 919 left -= xfer; 920 uiocp += xfer; 921 uiop->uio_offset += xfer; 922 uiop->uio_resid -= xfer; 923 } 924 uiop->uio_iov->iov_base += uiosiz; 925 uiop->uio_iov->iov_len -= uiosiz; 926 siz -= uiosiz; 927 } 928 if (rem > 0) { 929 if (rem > M_TRAILINGSPACE(mp)) { 930 MGET(mp, M_WAIT, MT_DATA); 931 mp->m_len = 0; 932 mp2->m_next = mp; 933 } 934 cp = mtod(mp, caddr_t)+mp->m_len; 935 for (left = 0; left < rem; left++) 936 *cp++ = '\0'; 937 mp->m_len += rem; 938 *bpos = cp; 939 } else 940 *bpos = mtod(mp, caddr_t)+mp->m_len; 941 *mq = mp; 942 return (0); 943} 944 945/* 946 * Help break down an mbuf chain by setting the first siz bytes contiguous 947 * pointed to by returned val. 948 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 949 * cases. (The macros use the vars. dpos and dpos2) 950 */ 951int 952nfsm_disct(mdp, dposp, siz, left, cp2) 953 struct mbuf **mdp; 954 caddr_t *dposp; 955 int siz; 956 int left; 957 caddr_t *cp2; 958{ 959 register struct mbuf *mp, *mp2; 960 register int siz2, xfer; 961 register caddr_t p; 962 963 mp = *mdp; 964 while (left == 0) { 965 *mdp = mp = mp->m_next; 966 if (mp == NULL) 967 return (EBADRPC); 968 left = mp->m_len; 969 *dposp = mtod(mp, caddr_t); 970 } 971 if (left >= siz) { 972 *cp2 = *dposp; 973 *dposp += siz; 974 } else if (mp->m_next == NULL) { 975 return (EBADRPC); 976 } else if (siz > MHLEN) { 977 panic("nfs S too big"); 978 } else { 979 MGET(mp2, M_WAIT, MT_DATA); 980 mp2->m_next = mp->m_next; 981 mp->m_next = mp2; 982 mp->m_len -= left; 983 mp = mp2; 984 *cp2 = p = mtod(mp, caddr_t); 985 bcopy(*dposp, p, left); /* Copy what was left */ 986 siz2 = siz-left; 987 p += left; 988 mp2 = mp->m_next; 989 /* Loop around copying up the siz2 bytes */ 990 while (siz2 > 0) { 991 if (mp2 == NULL) 992 return (EBADRPC); 993 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 994 if (xfer > 0) { 995 bcopy(mtod(mp2, caddr_t), p, xfer); 996 NFSMADV(mp2, xfer); 997 mp2->m_len -= xfer; 998 p += xfer; 999 siz2 -= xfer; 1000 } 1001 if (siz2 > 0) 1002 mp2 = mp2->m_next; 1003 } 1004 mp->m_len = siz; 1005 *mdp = mp2; 1006 *dposp = mtod(mp2, caddr_t); 1007 } 1008 return (0); 1009} 1010 1011/* 1012 * Advance the position in the mbuf chain. 1013 */ 1014int 1015nfs_adv(mdp, dposp, offs, left) 1016 struct mbuf **mdp; 1017 caddr_t *dposp; 1018 int offs; 1019 int left; 1020{ 1021 register struct mbuf *m; 1022 register int s; 1023 1024 m = *mdp; 1025 s = left; 1026 while (s < offs) { 1027 offs -= s; 1028 m = m->m_next; 1029 if (m == NULL) 1030 return (EBADRPC); 1031 s = m->m_len; 1032 } 1033 *mdp = m; 1034 *dposp = mtod(m, caddr_t)+offs; 1035 return (0); 1036} 1037 1038/* 1039 * Copy a string into mbufs for the hard cases... 1040 */ 1041int 1042nfsm_strtmbuf(mb, bpos, cp, siz) 1043 struct mbuf **mb; 1044 char **bpos; 1045 const char *cp; 1046 long siz; 1047{ 1048 register struct mbuf *m1 = NULL, *m2; 1049 long left, xfer, len, tlen; 1050 u_int32_t *tl; 1051 int putsize; 1052 1053 putsize = 1; 1054 m2 = *mb; 1055 left = M_TRAILINGSPACE(m2); 1056 if (left > 0) { 1057 tl = ((u_int32_t *)(*bpos)); 1058 *tl++ = txdr_unsigned(siz); 1059 putsize = 0; 1060 left -= NFSX_UNSIGNED; 1061 m2->m_len += NFSX_UNSIGNED; 1062 if (left > 0) { 1063 bcopy(cp, (caddr_t) tl, left); 1064 siz -= left; 1065 cp += left; 1066 m2->m_len += left; 1067 left = 0; 1068 } 1069 } 1070 /* Loop around adding mbufs */ 1071 while (siz > 0) { 1072 MGET(m1, M_WAIT, MT_DATA); 1073 if (siz > MLEN) 1074 MCLGET(m1, M_WAIT); 1075 m1->m_len = NFSMSIZ(m1); 1076 m2->m_next = m1; 1077 m2 = m1; 1078 tl = mtod(m1, u_int32_t *); 1079 tlen = 0; 1080 if (putsize) { 1081 *tl++ = txdr_unsigned(siz); 1082 m1->m_len -= NFSX_UNSIGNED; 1083 tlen = NFSX_UNSIGNED; 1084 putsize = 0; 1085 } 1086 if (siz < m1->m_len) { 1087 len = nfsm_rndup(siz); 1088 xfer = siz; 1089 if (xfer < len) 1090 *(tl+(xfer>>2)) = 0; 1091 } else { 1092 xfer = len = m1->m_len; 1093 } 1094 bcopy(cp, (caddr_t) tl, xfer); 1095 m1->m_len = len+tlen; 1096 siz -= xfer; 1097 cp += xfer; 1098 } 1099 *mb = m1; 1100 *bpos = mtod(m1, caddr_t)+m1->m_len; 1101 return (0); 1102} 1103 1104/* 1105 * Called once to initialize data structures... 1106 */ 1107int 1108nfs_init(vfsp) 1109 struct vfsconf *vfsp; 1110{ 1111 register int i; 1112 1113 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); 1114 1115 /* 1116 * Check to see if major data structures haven't bloated. 1117 */ 1118 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1119 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1120 printf("Try reducing NFS_UIDHASHSIZ\n"); 1121 } 1122 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1123 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1124 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1125 } 1126 nfs_mount_type = vfsp->vfc_typenum; 1127 nfsrtt.pos = 0; 1128 rpc_vers = txdr_unsigned(RPC_VER2); 1129 rpc_call = txdr_unsigned(RPC_CALL); 1130 rpc_reply = txdr_unsigned(RPC_REPLY); 1131 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1132 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1133 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1134 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1135 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1136 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1137 nfs_prog = txdr_unsigned(NFS_PROG); 1138 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1139 nfs_true = txdr_unsigned(TRUE); 1140 nfs_false = txdr_unsigned(FALSE); 1141 nfs_xdrneg1 = txdr_unsigned(-1); 1142 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1143 if (nfs_ticks < 1) 1144 nfs_ticks = 1; 1145 /* Ensure async daemons disabled */ 1146 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1147 nfs_iodwant[i] = (struct proc *)0; 1148 nfs_iodmount[i] = (struct nfsmount *)0; 1149 } 1150 nfs_nhinit(); /* Init the nfsnode table */ 1151#ifndef NFS_NOSERVER 1152 nfsrv_init(0); /* Init server data structures */ 1153 nfsrv_initcache(); /* Init the server request cache */ 1154#endif 1155 1156 /* 1157 * Initialize the nqnfs server stuff. 1158 */ 1159 if (nqnfsstarttime == 0) { 1160 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1161 + nqsrv_clockskew + nqsrv_writeslack; 1162 NQLOADNOVRAM(nqnfsstarttime); 1163 CIRCLEQ_INIT(&nqtimerhead); 1164 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1165 } 1166 1167 /* 1168 * Initialize reply list and start timer 1169 */ 1170 TAILQ_INIT(&nfs_reqq); 1171 1172 nfs_timer(0); 1173 1174 /* 1175 * Set up lease_check and lease_updatetime so that other parts 1176 * of the system can call us, if we are loadable. 1177 */ 1178#ifndef NFS_NOSERVER 1179 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; 1180 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; 1181#endif 1182 nfs_prev_lease_updatetime = lease_updatetime; 1183 lease_updatetime = nfs_lease_updatetime; 1184 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; 1185 sysent[SYS_nfssvc].sy_narg = 2; 1186 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; 1187 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; 1188#ifndef NFS_NOSERVER 1189 nfs_prev_getfh_sy_narg = sysent[SYS_getfh].sy_narg; 1190 sysent[SYS_getfh].sy_narg = 2; 1191 nfs_prev_getfh_sy_call = sysent[SYS_getfh].sy_call; 1192 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh; 1193#endif 1194 1195 nfs_pbuf_freecnt = nswbuf / 2 + 1; 1196 1197 return (0); 1198} 1199 1200int 1201nfs_uninit(vfsp) 1202 struct vfsconf *vfsp; 1203{ 1204 1205 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); 1206 nfs_mount_type = -1; 1207#ifndef NFS_NOSERVER 1208 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; 1209#endif 1210 lease_updatetime = nfs_prev_lease_updatetime; 1211 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; 1212 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; 1213#ifndef NFS_NOSERVER 1214 sysent[SYS_getfh].sy_narg = nfs_prev_getfh_sy_narg; 1215 sysent[SYS_getfh].sy_call = nfs_prev_getfh_sy_call; 1216#endif 1217 return (0); 1218} 1219 1220/* 1221 * Attribute cache routines. 1222 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1223 * that are on the mbuf list 1224 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1225 * error otherwise 1226 */ 1227 1228/* 1229 * Load the attribute cache (that lives in the nfsnode entry) with 1230 * the values on the mbuf list and 1231 * Iff vap not NULL 1232 * copy the attributes to *vaper 1233 */ 1234int 1235nfs_loadattrcache(vpp, mdp, dposp, vaper) 1236 struct vnode **vpp; 1237 struct mbuf **mdp; 1238 caddr_t *dposp; 1239 struct vattr *vaper; 1240{ 1241 register struct vnode *vp = *vpp; 1242 register struct vattr *vap; 1243 register struct nfs_fattr *fp; 1244 register struct nfsnode *np; 1245 register int32_t t1; 1246 caddr_t cp2; 1247 int error = 0, rdev; 1248 struct mbuf *md; 1249 enum vtype vtyp; 1250 u_short vmode; 1251 struct timespec mtime; 1252 struct vnode *nvp; 1253 int v3 = NFS_ISV3(vp); 1254 1255 md = *mdp; 1256 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1257 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) 1258 return (error); 1259 fp = (struct nfs_fattr *)cp2; 1260 if (v3) { 1261 vtyp = nfsv3tov_type(fp->fa_type); 1262 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1263 rdev = umakedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1264 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1265 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1266 } else { 1267 vtyp = nfsv2tov_type(fp->fa_type); 1268 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1269 /* 1270 * XXX 1271 * 1272 * The duplicate information returned in fa_type and fa_mode 1273 * is an ambiguity in the NFS version 2 protocol. 1274 * 1275 * VREG should be taken literally as a regular file. If a 1276 * server intents to return some type information differently 1277 * in the upper bits of the mode field (e.g. for sockets, or 1278 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1279 * leave the examination of the mode bits even in the VREG 1280 * case to avoid breakage for bogus servers, but we make sure 1281 * that there are actually type bits set in the upper part of 1282 * fa_mode (and failing that, trust the va_type field). 1283 * 1284 * NFSv3 cleared the issue, and requires fa_mode to not 1285 * contain any type information (while also introduing sockets 1286 * and FIFOs for fa_type). 1287 */ 1288 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1289 vtyp = IFTOVT(vmode); 1290 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1291 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1292 1293 /* 1294 * Really ugly NFSv2 kludge. 1295 */ 1296 if (vtyp == VCHR && rdev == 0xffffffff) 1297 vtyp = VFIFO; 1298 } 1299 1300 /* 1301 * If v_type == VNON it is a new node, so fill in the v_type, 1302 * n_mtime fields. Check to see if it represents a special 1303 * device, and if so, check for a possible alias. Once the 1304 * correct vnode has been obtained, fill in the rest of the 1305 * information. 1306 */ 1307 np = VTONFS(vp); 1308 if (vp->v_type != vtyp) { 1309 vp->v_type = vtyp; 1310 if (vp->v_type == VFIFO) { 1311 vp->v_op = fifo_nfsv2nodeop_p; 1312 } 1313 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1314 vp->v_op = spec_nfsv2nodeop_p; 1315 nvp = checkalias(vp, rdev, vp->v_mount); 1316 if (nvp) { 1317 /* 1318 * Discard unneeded vnode, but save its nfsnode. 1319 * Since the nfsnode does not have a lock, its 1320 * vnode lock has to be carried over. 1321 */ 1322 nvp->v_vnlock = vp->v_vnlock; 1323 vp->v_vnlock = NULL; 1324 nvp->v_data = vp->v_data; 1325 vp->v_data = NULL; 1326 vp->v_op = spec_vnodeop_p; 1327 vrele(vp); 1328 vgone(vp); 1329 /* 1330 * Reinitialize aliased node. 1331 */ 1332 np->n_vnode = nvp; 1333 *vpp = vp = nvp; 1334 } 1335 } 1336 np->n_mtime = mtime.tv_sec; 1337 } 1338 vap = &np->n_vattr; 1339 vap->va_type = vtyp; 1340 vap->va_mode = (vmode & 07777); 1341 vap->va_rdev = rdev; 1342 vap->va_mtime = mtime; 1343 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1344 if (v3) { 1345 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1346 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1347 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1348 vap->va_size = fxdr_hyper(&fp->fa3_size); 1349 vap->va_blocksize = NFS_FABLKSIZE; 1350 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1351 vap->va_fileid = fxdr_unsigned(int32_t, 1352 fp->fa3_fileid.nfsuquad[1]); 1353 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1354 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1355 vap->va_flags = 0; 1356 vap->va_filerev = 0; 1357 } else { 1358 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1359 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1360 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1361 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1362 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1363 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) 1364 * NFS_FABLKSIZE; 1365 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1366 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1367 vap->va_flags = 0; 1368 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1369 fp->fa2_ctime.nfsv2_sec); 1370 vap->va_ctime.tv_nsec = 0; 1371 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1372 vap->va_filerev = 0; 1373 } 1374 if (vap->va_size != np->n_size) { 1375 if (vap->va_type == VREG) { 1376 if (np->n_flag & NMODIFIED) { 1377 if (vap->va_size < np->n_size) 1378 vap->va_size = np->n_size; 1379 else 1380 np->n_size = vap->va_size; 1381 } else 1382 np->n_size = vap->va_size; 1383 vnode_pager_setsize(vp, np->n_size); 1384 } else 1385 np->n_size = vap->va_size; 1386 } 1387 np->n_attrstamp = time_second; 1388 if (vaper != NULL) { 1389 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1390 if (np->n_flag & NCHG) { 1391 if (np->n_flag & NACC) 1392 vaper->va_atime = np->n_atim; 1393 if (np->n_flag & NUPD) 1394 vaper->va_mtime = np->n_mtim; 1395 } 1396 } 1397 return (0); 1398} 1399 1400#ifdef NFS_ACDEBUG 1401#include <sys/sysctl.h> 1402SYSCTL_DECL(_vfs_nfs); 1403static int nfs_acdebug; 1404SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); 1405#endif 1406 1407/* 1408 * Check the time stamp 1409 * If the cache is valid, copy contents to *vap and return 0 1410 * otherwise return an error 1411 */ 1412int 1413nfs_getattrcache(vp, vaper) 1414 register struct vnode *vp; 1415 struct vattr *vaper; 1416{ 1417 register struct nfsnode *np; 1418 register struct vattr *vap; 1419 struct nfsmount *nmp; 1420 int timeo; 1421 1422 np = VTONFS(vp); 1423 vap = &np->n_vattr; 1424 nmp = VFSTONFS(vp->v_mount); 1425 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ 1426 timeo = (time_second - np->n_mtime) / 10; 1427 1428#ifdef NFS_ACDEBUG 1429 if (nfs_acdebug>1) 1430 printf("nfs_getattrcache: initial timeo = %d\n", timeo); 1431#endif 1432 1433 if (vap->va_type == VDIR) { 1434 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) 1435 timeo = nmp->nm_acdirmin; 1436 else if (timeo > nmp->nm_acdirmax) 1437 timeo = nmp->nm_acdirmax; 1438 } else { 1439 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) 1440 timeo = nmp->nm_acregmin; 1441 else if (timeo > nmp->nm_acregmax) 1442 timeo = nmp->nm_acregmax; 1443 } 1444 1445#ifdef NFS_ACDEBUG 1446 if (nfs_acdebug > 2) 1447 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", 1448 nmp->nm_acregmin, nmp->nm_acregmax, 1449 nmp->nm_acdirmin, nmp->nm_acdirmax); 1450 1451 if (nfs_acdebug) 1452 printf("nfs_getattrcache: age = %d; final timeo = %d\n", 1453 (time_second - np->n_attrstamp), timeo); 1454#endif 1455 1456 if ((time_second - np->n_attrstamp) >= timeo) { 1457 nfsstats.attrcache_misses++; 1458 return (ENOENT); 1459 } 1460 nfsstats.attrcache_hits++; 1461 if (vap->va_size != np->n_size) { 1462 if (vap->va_type == VREG) { 1463 if (np->n_flag & NMODIFIED) { 1464 if (vap->va_size < np->n_size) 1465 vap->va_size = np->n_size; 1466 else 1467 np->n_size = vap->va_size; 1468 } else 1469 np->n_size = vap->va_size; 1470 vnode_pager_setsize(vp, np->n_size); 1471 } else 1472 np->n_size = vap->va_size; 1473 } 1474 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1475 if (np->n_flag & NCHG) { 1476 if (np->n_flag & NACC) 1477 vaper->va_atime = np->n_atim; 1478 if (np->n_flag & NUPD) 1479 vaper->va_mtime = np->n_mtim; 1480 } 1481 return (0); 1482} 1483 1484#ifndef NFS_NOSERVER 1485/* 1486 * Set up nameidata for a lookup() call and do it. 1487 * 1488 * If pubflag is set, this call is done for a lookup operation on the 1489 * public filehandle. In that case we allow crossing mountpoints and 1490 * absolute pathnames. However, the caller is expected to check that 1491 * the lookup result is within the public fs, and deny access if 1492 * it is not. 1493 * 1494 * nfs_namei() clears out garbage fields that namei() might leave garbage. 1495 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no 1496 * error occurs but the parent was not requested. 1497 * 1498 * dirp may be set whether an error is returned or not, and must be 1499 * released by the caller. 1500 */ 1501int 1502nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1503 register struct nameidata *ndp; 1504 fhandle_t *fhp; 1505 int len; 1506 struct nfssvc_sock *slp; 1507 struct sockaddr *nam; 1508 struct mbuf **mdp; 1509 caddr_t *dposp; 1510 struct vnode **retdirp; 1511 struct proc *p; 1512 int kerbflag, pubflag; 1513{ 1514 register int i, rem; 1515 register struct mbuf *md; 1516 register char *fromcp, *tocp, *cp; 1517 struct iovec aiov; 1518 struct uio auio; 1519 struct vnode *dp; 1520 int error, rdonly, linklen; 1521 struct componentname *cnp = &ndp->ni_cnd; 1522 1523 *retdirp = (struct vnode *)0; 1524 cnp->cn_pnbuf = zalloc(namei_zone); 1525 1526 /* 1527 * Copy the name from the mbuf list to ndp->ni_pnbuf 1528 * and set the various ndp fields appropriately. 1529 */ 1530 fromcp = *dposp; 1531 tocp = cnp->cn_pnbuf; 1532 md = *mdp; 1533 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1534 cnp->cn_hash = 0; 1535 for (i = 0; i < len; i++) { 1536 while (rem == 0) { 1537 md = md->m_next; 1538 if (md == NULL) { 1539 error = EBADRPC; 1540 goto out; 1541 } 1542 fromcp = mtod(md, caddr_t); 1543 rem = md->m_len; 1544 } 1545 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1546 error = EACCES; 1547 goto out; 1548 } 1549 cnp->cn_hash += (unsigned char)*fromcp; 1550 *tocp++ = *fromcp++; 1551 rem--; 1552 } 1553 *tocp = '\0'; 1554 *mdp = md; 1555 *dposp = fromcp; 1556 len = nfsm_rndup(len)-len; 1557 if (len > 0) { 1558 if (rem >= len) 1559 *dposp += len; 1560 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1561 goto out; 1562 } 1563 1564 /* 1565 * Extract and set starting directory. 1566 */ 1567 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1568 nam, &rdonly, kerbflag, pubflag); 1569 if (error) 1570 goto out; 1571 if (dp->v_type != VDIR) { 1572 vrele(dp); 1573 error = ENOTDIR; 1574 goto out; 1575 } 1576 1577 if (rdonly) 1578 cnp->cn_flags |= RDONLY; 1579 1580 /* 1581 * Set return directory. Reference to dp is implicitly transfered 1582 * to the returned pointer 1583 */ 1584 *retdirp = dp; 1585 1586 if (pubflag) { 1587 /* 1588 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1589 * and the 'native path' indicator. 1590 */ 1591 cp = zalloc(namei_zone); 1592 fromcp = cnp->cn_pnbuf; 1593 tocp = cp; 1594 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1595 switch ((unsigned char)*fromcp) { 1596 case WEBNFS_NATIVE_CHAR: 1597 /* 1598 * 'Native' path for us is the same 1599 * as a path according to the NFS spec, 1600 * just skip the escape char. 1601 */ 1602 fromcp++; 1603 break; 1604 /* 1605 * More may be added in the future, range 0x80-0xff 1606 */ 1607 default: 1608 error = EIO; 1609 zfree(namei_zone, cp); 1610 goto out; 1611 } 1612 } 1613 /* 1614 * Translate the '%' escapes, URL-style. 1615 */ 1616 while (*fromcp != '\0') { 1617 if (*fromcp == WEBNFS_ESC_CHAR) { 1618 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1619 fromcp++; 1620 *tocp++ = HEXSTRTOI(fromcp); 1621 fromcp += 2; 1622 continue; 1623 } else { 1624 error = ENOENT; 1625 zfree(namei_zone, cp); 1626 goto out; 1627 } 1628 } else 1629 *tocp++ = *fromcp++; 1630 } 1631 *tocp = '\0'; 1632 zfree(namei_zone, cnp->cn_pnbuf); 1633 cnp->cn_pnbuf = cp; 1634 } 1635 1636 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1637 ndp->ni_segflg = UIO_SYSSPACE; 1638 1639 if (pubflag) { 1640 ndp->ni_rootdir = rootvnode; 1641 ndp->ni_loopcnt = 0; 1642 if (cnp->cn_pnbuf[0] == '/') 1643 dp = rootvnode; 1644 } else { 1645 cnp->cn_flags |= NOCROSSMOUNT; 1646 } 1647 1648 /* 1649 * Initialize for scan, set ni_startdir and bump ref on dp again 1650 * becuase lookup() will dereference ni_startdir. 1651 */ 1652 1653 cnp->cn_proc = p; 1654 VREF(dp); 1655 ndp->ni_startdir = dp; 1656 1657 for (;;) { 1658 cnp->cn_nameptr = cnp->cn_pnbuf; 1659 /* 1660 * Call lookup() to do the real work. If an error occurs, 1661 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 1662 * we do not have to dereference anything before returning. 1663 * In either case ni_startdir will be dereferenced and NULLed 1664 * out. 1665 */ 1666 error = lookup(ndp); 1667 if (error) 1668 break; 1669 1670 /* 1671 * Check for encountering a symbolic link. Trivial 1672 * termination occurs if no symlink encountered. 1673 * Note: zfree is safe because error is 0, so we will 1674 * not zfree it again when we break. 1675 */ 1676 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1677 nfsrv_object_create(ndp->ni_vp); 1678 if (cnp->cn_flags & (SAVENAME | SAVESTART)) 1679 cnp->cn_flags |= HASBUF; 1680 else 1681 zfree(namei_zone, cnp->cn_pnbuf); 1682 break; 1683 } 1684 1685 /* 1686 * Validate symlink 1687 */ 1688 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1689 VOP_UNLOCK(ndp->ni_dvp, 0, p); 1690 if (!pubflag) { 1691 error = EINVAL; 1692 goto badlink2; 1693 } 1694 1695 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1696 error = ELOOP; 1697 goto badlink2; 1698 } 1699 if (ndp->ni_pathlen > 1) 1700 cp = zalloc(namei_zone); 1701 else 1702 cp = cnp->cn_pnbuf; 1703 aiov.iov_base = cp; 1704 aiov.iov_len = MAXPATHLEN; 1705 auio.uio_iov = &aiov; 1706 auio.uio_iovcnt = 1; 1707 auio.uio_offset = 0; 1708 auio.uio_rw = UIO_READ; 1709 auio.uio_segflg = UIO_SYSSPACE; 1710 auio.uio_procp = (struct proc *)0; 1711 auio.uio_resid = MAXPATHLEN; 1712 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1713 if (error) { 1714 badlink1: 1715 if (ndp->ni_pathlen > 1) 1716 zfree(namei_zone, cp); 1717 badlink2: 1718 vrele(ndp->ni_dvp); 1719 vput(ndp->ni_vp); 1720 break; 1721 } 1722 linklen = MAXPATHLEN - auio.uio_resid; 1723 if (linklen == 0) { 1724 error = ENOENT; 1725 goto badlink1; 1726 } 1727 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1728 error = ENAMETOOLONG; 1729 goto badlink1; 1730 } 1731 1732 /* 1733 * Adjust or replace path 1734 */ 1735 if (ndp->ni_pathlen > 1) { 1736 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); 1737 zfree(namei_zone, cnp->cn_pnbuf); 1738 cnp->cn_pnbuf = cp; 1739 } else 1740 cnp->cn_pnbuf[linklen] = '\0'; 1741 ndp->ni_pathlen += linklen; 1742 1743 /* 1744 * Cleanup refs for next loop and check if root directory 1745 * should replace current directory. Normally ni_dvp 1746 * becomes the new base directory and is cleaned up when 1747 * we loop. Explicitly null pointers after invalidation 1748 * to clarify operation. 1749 */ 1750 vput(ndp->ni_vp); 1751 ndp->ni_vp = NULL; 1752 1753 if (cnp->cn_pnbuf[0] == '/') { 1754 vrele(ndp->ni_dvp); 1755 ndp->ni_dvp = ndp->ni_rootdir; 1756 VREF(ndp->ni_dvp); 1757 } 1758 ndp->ni_startdir = ndp->ni_dvp; 1759 ndp->ni_dvp = NULL; 1760 } 1761 1762 /* 1763 * nfs_namei() guarentees that fields will not contain garbage 1764 * whether an error occurs or not. This allows the caller to track 1765 * cleanup state trivially. 1766 */ 1767out: 1768 if (error) { 1769 zfree(namei_zone, cnp->cn_pnbuf); 1770 ndp->ni_vp = NULL; 1771 ndp->ni_dvp = NULL; 1772 ndp->ni_startdir = NULL; 1773 cnp->cn_flags &= ~HASBUF; 1774 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { 1775 ndp->ni_dvp = NULL; 1776 } 1777 return (error); 1778} 1779 1780/* 1781 * A fiddled version of m_adj() that ensures null fill to a long 1782 * boundary and only trims off the back end 1783 */ 1784void 1785nfsm_adj(mp, len, nul) 1786 struct mbuf *mp; 1787 register int len; 1788 int nul; 1789{ 1790 register struct mbuf *m; 1791 register int count, i; 1792 register char *cp; 1793 1794 /* 1795 * Trim from tail. Scan the mbuf chain, 1796 * calculating its length and finding the last mbuf. 1797 * If the adjustment only affects this mbuf, then just 1798 * adjust and return. Otherwise, rescan and truncate 1799 * after the remaining size. 1800 */ 1801 count = 0; 1802 m = mp; 1803 for (;;) { 1804 count += m->m_len; 1805 if (m->m_next == (struct mbuf *)0) 1806 break; 1807 m = m->m_next; 1808 } 1809 if (m->m_len > len) { 1810 m->m_len -= len; 1811 if (nul > 0) { 1812 cp = mtod(m, caddr_t)+m->m_len-nul; 1813 for (i = 0; i < nul; i++) 1814 *cp++ = '\0'; 1815 } 1816 return; 1817 } 1818 count -= len; 1819 if (count < 0) 1820 count = 0; 1821 /* 1822 * Correct length for chain is "count". 1823 * Find the mbuf with last data, adjust its length, 1824 * and toss data from remaining mbufs on chain. 1825 */ 1826 for (m = mp; m; m = m->m_next) { 1827 if (m->m_len >= count) { 1828 m->m_len = count; 1829 if (nul > 0) { 1830 cp = mtod(m, caddr_t)+m->m_len-nul; 1831 for (i = 0; i < nul; i++) 1832 *cp++ = '\0'; 1833 } 1834 break; 1835 } 1836 count -= m->m_len; 1837 } 1838 for (m = m->m_next;m;m = m->m_next) 1839 m->m_len = 0; 1840} 1841 1842/* 1843 * Make these functions instead of macros, so that the kernel text size 1844 * doesn't get too big... 1845 */ 1846void 1847nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1848 struct nfsrv_descript *nfsd; 1849 int before_ret; 1850 register struct vattr *before_vap; 1851 int after_ret; 1852 struct vattr *after_vap; 1853 struct mbuf **mbp; 1854 char **bposp; 1855{ 1856 register struct mbuf *mb = *mbp, *mb2; 1857 register char *bpos = *bposp; 1858 register u_int32_t *tl; 1859 1860 if (before_ret) { 1861 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1862 *tl = nfs_false; 1863 } else { 1864 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1865 *tl++ = nfs_true; 1866 txdr_hyper(before_vap->va_size, tl); 1867 tl += 2; 1868 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1869 tl += 2; 1870 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1871 } 1872 *bposp = bpos; 1873 *mbp = mb; 1874 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1875} 1876 1877void 1878nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1879 struct nfsrv_descript *nfsd; 1880 int after_ret; 1881 struct vattr *after_vap; 1882 struct mbuf **mbp; 1883 char **bposp; 1884{ 1885 register struct mbuf *mb = *mbp, *mb2; 1886 register char *bpos = *bposp; 1887 register u_int32_t *tl; 1888 register struct nfs_fattr *fp; 1889 1890 if (after_ret) { 1891 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1892 *tl = nfs_false; 1893 } else { 1894 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1895 *tl++ = nfs_true; 1896 fp = (struct nfs_fattr *)tl; 1897 nfsm_srvfattr(nfsd, after_vap, fp); 1898 } 1899 *mbp = mb; 1900 *bposp = bpos; 1901} 1902 1903void 1904nfsm_srvfattr(nfsd, vap, fp) 1905 register struct nfsrv_descript *nfsd; 1906 register struct vattr *vap; 1907 register struct nfs_fattr *fp; 1908{ 1909 1910 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1911 fp->fa_uid = txdr_unsigned(vap->va_uid); 1912 fp->fa_gid = txdr_unsigned(vap->va_gid); 1913 if (nfsd->nd_flag & ND_NFSV3) { 1914 fp->fa_type = vtonfsv3_type(vap->va_type); 1915 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1916 txdr_hyper(vap->va_size, &fp->fa3_size); 1917 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1918 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); 1919 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); 1920 fp->fa3_fsid.nfsuquad[0] = 0; 1921 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1922 fp->fa3_fileid.nfsuquad[0] = 0; 1923 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1924 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1925 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1926 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1927 } else { 1928 fp->fa_type = vtonfsv2_type(vap->va_type); 1929 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1930 fp->fa2_size = txdr_unsigned(vap->va_size); 1931 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1932 if (vap->va_type == VFIFO) 1933 fp->fa2_rdev = 0xffffffff; 1934 else 1935 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1936 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1937 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1938 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1939 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1940 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1941 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1942 } 1943} 1944 1945/* 1946 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1947 * - look up fsid in mount list (if not found ret error) 1948 * - get vp and export rights by calling VFS_FHTOVP() 1949 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1950 * - if not lockflag unlock it with VOP_UNLOCK() 1951 */ 1952int 1953nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 1954 fhandle_t *fhp; 1955 int lockflag; 1956 struct vnode **vpp; 1957 struct ucred *cred; 1958 struct nfssvc_sock *slp; 1959 struct sockaddr *nam; 1960 int *rdonlyp; 1961 int kerbflag; 1962 int pubflag; 1963{ 1964 struct proc *p = curproc; /* XXX */ 1965 register struct mount *mp; 1966 register int i; 1967 struct ucred *credanon; 1968 int error, exflags; 1969#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ 1970 struct sockaddr_int *saddr; 1971#endif 1972 1973 *vpp = (struct vnode *)0; 1974 1975 if (nfs_ispublicfh(fhp)) { 1976 if (!pubflag || !nfs_pub.np_valid) 1977 return (ESTALE); 1978 fhp = &nfs_pub.np_handle; 1979 } 1980 1981 mp = vfs_getvfs(&fhp->fh_fsid); 1982 if (!mp) 1983 return (ESTALE); 1984 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1985 if (error) 1986 return (error); 1987#ifdef MNT_EXNORESPORT 1988 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 1989 saddr = (struct sockaddr_in *)nam; 1990 if (saddr->sin_family == AF_INET && 1991 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 1992 vput(*vpp); 1993 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1994 } 1995 } 1996#endif 1997 /* 1998 * Check/setup credentials. 1999 */ 2000 if (exflags & MNT_EXKERB) { 2001 if (!kerbflag) { 2002 vput(*vpp); 2003 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2004 } 2005 } else if (kerbflag) { 2006 vput(*vpp); 2007 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2008 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2009 cred->cr_uid = credanon->cr_uid; 2010 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2011 cred->cr_groups[i] = credanon->cr_groups[i]; 2012 cred->cr_ngroups = i; 2013 } 2014 if (exflags & MNT_EXRDONLY) 2015 *rdonlyp = 1; 2016 else 2017 *rdonlyp = 0; 2018 2019 nfsrv_object_create(*vpp); 2020 2021 if (!lockflag) 2022 VOP_UNLOCK(*vpp, 0, p); 2023 return (0); 2024} 2025 2026 2027/* 2028 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2029 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2030 * transformed this to all zeroes in both cases, so check for it. 2031 */ 2032int 2033nfs_ispublicfh(fhp) 2034 fhandle_t *fhp; 2035{ 2036 char *cp = (char *)fhp; 2037 int i; 2038 2039 for (i = 0; i < NFSX_V3FH; i++) 2040 if (*cp++ != 0) 2041 return (FALSE); 2042 return (TRUE); 2043} 2044 2045#endif /* NFS_NOSERVER */ 2046/* 2047 * This function compares two net addresses by family and returns TRUE 2048 * if they are the same host. 2049 * If there is any doubt, return FALSE. 2050 * The AF_INET family is handled as a special case so that address mbufs 2051 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2052 */ 2053int 2054netaddr_match(family, haddr, nam) 2055 int family; 2056 union nethostaddr *haddr; 2057 struct sockaddr *nam; 2058{ 2059 register struct sockaddr_in *inetaddr; 2060 2061 switch (family) { 2062 case AF_INET: 2063 inetaddr = (struct sockaddr_in *)nam; 2064 if (inetaddr->sin_family == AF_INET && 2065 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2066 return (1); 2067 break; 2068#ifdef ISO 2069 case AF_ISO: 2070 { 2071 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2072 2073 isoaddr1 = (struct sockaddr_iso *)nam; 2074 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam; 2075 if (isoaddr1->siso_family == AF_ISO && 2076 isoaddr1->siso_nlen > 0 && 2077 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2078 SAME_ISOADDR(isoaddr1, isoaddr2)) 2079 return (1); 2080 break; 2081 } 2082#endif /* ISO */ 2083 default: 2084 break; 2085 }; 2086 return (0); 2087} 2088 2089static nfsuint64 nfs_nullcookie = { { 0, 0 } }; 2090/* 2091 * This function finds the directory cookie that corresponds to the 2092 * logical byte offset given. 2093 */ 2094nfsuint64 * 2095nfs_getcookie(np, off, add) 2096 register struct nfsnode *np; 2097 off_t off; 2098 int add; 2099{ 2100 register struct nfsdmap *dp, *dp2; 2101 register int pos; 2102 2103 pos = (uoff_t)off / NFS_DIRBLKSIZ; 2104 if (pos == 0 || off < 0) { 2105#ifdef DIAGNOSTIC 2106 if (add) 2107 panic("nfs getcookie add at <= 0"); 2108#endif 2109 return (&nfs_nullcookie); 2110 } 2111 pos--; 2112 dp = np->n_cookies.lh_first; 2113 if (!dp) { 2114 if (add) { 2115 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 2116 M_NFSDIROFF, M_WAITOK); 2117 dp->ndm_eocookie = 0; 2118 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 2119 } else 2120 return ((nfsuint64 *)0); 2121 } 2122 while (pos >= NFSNUMCOOKIES) { 2123 pos -= NFSNUMCOOKIES; 2124 if (dp->ndm_list.le_next) { 2125 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 2126 pos >= dp->ndm_eocookie) 2127 return ((nfsuint64 *)0); 2128 dp = dp->ndm_list.le_next; 2129 } else if (add) { 2130 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 2131 M_NFSDIROFF, M_WAITOK); 2132 dp2->ndm_eocookie = 0; 2133 LIST_INSERT_AFTER(dp, dp2, ndm_list); 2134 dp = dp2; 2135 } else 2136 return ((nfsuint64 *)0); 2137 } 2138 if (pos >= dp->ndm_eocookie) { 2139 if (add) 2140 dp->ndm_eocookie = pos + 1; 2141 else 2142 return ((nfsuint64 *)0); 2143 } 2144 return (&dp->ndm_cookies[pos]); 2145} 2146 2147/* 2148 * Invalidate cached directory information, except for the actual directory 2149 * blocks (which are invalidated separately). 2150 * Done mainly to avoid the use of stale offset cookies. 2151 */ 2152void 2153nfs_invaldir(vp) 2154 register struct vnode *vp; 2155{ 2156 register struct nfsnode *np = VTONFS(vp); 2157 2158#ifdef DIAGNOSTIC 2159 if (vp->v_type != VDIR) 2160 panic("nfs: invaldir not dir"); 2161#endif 2162 np->n_direofoffset = 0; 2163 np->n_cookieverf.nfsuquad[0] = 0; 2164 np->n_cookieverf.nfsuquad[1] = 0; 2165 if (np->n_cookies.lh_first) 2166 np->n_cookies.lh_first->ndm_eocookie = 0; 2167} 2168 2169/* 2170 * The write verifier has changed (probably due to a server reboot), so all 2171 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2172 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2173 * flag. Once done the new write verifier can be set for the mount point. 2174 */ 2175void 2176nfs_clearcommit(mp) 2177 struct mount *mp; 2178{ 2179 register struct vnode *vp, *nvp; 2180 register struct buf *bp, *nbp; 2181 int s; 2182 2183 s = splbio(); 2184loop: 2185 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2186 if (vp->v_mount != mp) /* Paranoia */ 2187 goto loop; 2188 nvp = vp->v_mntvnodes.le_next; 2189 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 2190 nbp = TAILQ_NEXT(bp, b_vnbufs); 2191 if (BUF_REFCNT(bp) == 0 && 2192 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) 2193 == (B_DELWRI | B_NEEDCOMMIT)) 2194 bp->b_flags &= ~B_NEEDCOMMIT; 2195 } 2196 } 2197 splx(s); 2198} 2199 2200#ifndef NFS_NOSERVER 2201/* 2202 * Map errnos to NFS error numbers. For Version 3 also filter out error 2203 * numbers not specified for the associated procedure. 2204 */ 2205int 2206nfsrv_errmap(nd, err) 2207 struct nfsrv_descript *nd; 2208 register int err; 2209{ 2210 register short *defaulterrp, *errp; 2211 2212 if (nd->nd_flag & ND_NFSV3) { 2213 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2214 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2215 while (*++errp) { 2216 if (*errp == err) 2217 return (err); 2218 else if (*errp > err) 2219 break; 2220 } 2221 return ((int)*defaulterrp); 2222 } else 2223 return (err & 0xffff); 2224 } 2225 if (err <= ELAST) 2226 return ((int)nfsrv_v2errmap[err - 1]); 2227 return (NFSERR_IO); 2228} 2229 2230int 2231nfsrv_object_create(vp) 2232 struct vnode *vp; 2233{ 2234 2235 if (vp == NULL || vp->v_type != VREG) 2236 return (1); 2237 return (vfs_object_create(vp, curproc, 2238 curproc ? curproc->p_ucred : NULL)); 2239} 2240 2241/* 2242 * Sort the group list in increasing numerical order. 2243 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2244 * that used to be here.) 2245 */ 2246void 2247nfsrvw_sort(list, num) 2248 register gid_t *list; 2249 register int num; 2250{ 2251 register int i, j; 2252 gid_t v; 2253 2254 /* Insertion sort. */ 2255 for (i = 1; i < num; i++) { 2256 v = list[i]; 2257 /* find correct slot for value v, moving others up */ 2258 for (j = i; --j >= 0 && v < list[j];) 2259 list[j + 1] = list[j]; 2260 list[j + 1] = v; 2261 } 2262} 2263 2264/* 2265 * copy credentials making sure that the result can be compared with bcmp(). 2266 */ 2267void 2268nfsrv_setcred(incred, outcred) 2269 register struct ucred *incred, *outcred; 2270{ 2271 register int i; 2272 2273 bzero((caddr_t)outcred, sizeof (struct ucred)); 2274 outcred->cr_ref = 1; 2275 outcred->cr_uid = incred->cr_uid; 2276 outcred->cr_ngroups = incred->cr_ngroups; 2277 for (i = 0; i < incred->cr_ngroups; i++) 2278 outcred->cr_groups[i] = incred->cr_groups[i]; 2279 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2280} 2281#endif /* NFS_NOSERVER */ 2282