nfs_srvsubs.c revision 13416
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 8.3 (Berkeley) 1/4/94 37 * $Id: nfs_subs.c,v 1.26 1995/12/17 21:12:30 phk Exp $ 38 */ 39 40/* 41 * These functions support the macros and help fiddle mbuf chains for 42 * the nfs op functions. They do things like create the rpc header and 43 * copy data between mbuf chains and uio lists. 44 */ 45#include <sys/param.h> 46#include <sys/proc.h> 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/mount.h> 50#include <sys/vnode.h> 51#include <sys/namei.h> 52#include <sys/mbuf.h> 53#include <sys/socket.h> 54#include <sys/stat.h> 55#include <sys/malloc.h> 56#ifdef VFS_LKM 57#include <sys/sysent.h> 58#include <sys/syscall.h> 59#endif 60 61#include <vm/vm.h> 62#include <vm/vm_param.h> 63#include <vm/vm_object.h> 64#include <vm/vm_extern.h> 65#include <vm/vnode_pager.h> 66 67#include <nfs/rpcv2.h> 68#include <nfs/nfsproto.h> 69#include <nfs/nfsnode.h> 70#include <nfs/nfs.h> 71#include <nfs/xdr_subs.h> 72#include <nfs/nfsm_subs.h> 73#include <nfs/nfsmount.h> 74#include <nfs/nqnfs.h> 75#include <nfs/nfsrtt.h> 76 77#include <miscfs/specfs/specdev.h> 78 79#include <netinet/in.h> 80#ifdef ISO 81#include <netiso/iso.h> 82#endif 83 84/* 85 * Data items converted to xdr at startup, since they are constant 86 * This is kinda hokey, but may save a little time doing byte swaps 87 */ 88u_long nfs_xdrneg1; 89u_long rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 90 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 91 rpc_auth_kerb; 92u_long nfs_prog, nqnfs_prog, nfs_true, nfs_false; 93 94/* And other global data */ 95static u_long nfs_xid = 0; 96static enum vtype nv2tov_type[8]= { 97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON 98}; 99enum vtype nv3tov_type[8]= { 100 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO 101}; 102 103int nfs_ticks; 104 105struct nfs_reqq nfs_reqq; 106struct nfssvc_sockhead nfssvc_sockhead; 107int nfssvc_sockhead_flag; 108struct nfsd_head nfsd_head; 109int nfsd_head_flag; 110struct nfs_bufq nfs_bufq; 111struct nqtimerhead nqtimerhead; 112struct nqfhhashhead *nqfhhashtbl; 113u_long nqfhhash; 114 115#ifndef NFS_NOSERVER 116/* 117 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 118 */ 119int nfsv3_procid[NFS_NPROCS] = { 120 NFSPROC_NULL, 121 NFSPROC_GETATTR, 122 NFSPROC_SETATTR, 123 NFSPROC_NOOP, 124 NFSPROC_LOOKUP, 125 NFSPROC_READLINK, 126 NFSPROC_READ, 127 NFSPROC_NOOP, 128 NFSPROC_WRITE, 129 NFSPROC_CREATE, 130 NFSPROC_REMOVE, 131 NFSPROC_RENAME, 132 NFSPROC_LINK, 133 NFSPROC_SYMLINK, 134 NFSPROC_MKDIR, 135 NFSPROC_RMDIR, 136 NFSPROC_READDIR, 137 NFSPROC_FSSTAT, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP, 145 NFSPROC_NOOP 146}; 147 148#endif /* NFS_NOSERVER */ 149/* 150 * and the reverse mapping from generic to Version 2 procedure numbers 151 */ 152int nfsv2_procid[NFS_NPROCS] = { 153 NFSV2PROC_NULL, 154 NFSV2PROC_GETATTR, 155 NFSV2PROC_SETATTR, 156 NFSV2PROC_LOOKUP, 157 NFSV2PROC_NOOP, 158 NFSV2PROC_READLINK, 159 NFSV2PROC_READ, 160 NFSV2PROC_WRITE, 161 NFSV2PROC_CREATE, 162 NFSV2PROC_MKDIR, 163 NFSV2PROC_SYMLINK, 164 NFSV2PROC_CREATE, 165 NFSV2PROC_REMOVE, 166 NFSV2PROC_RMDIR, 167 NFSV2PROC_RENAME, 168 NFSV2PROC_LINK, 169 NFSV2PROC_READDIR, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_STATFS, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 NFSV2PROC_NOOP, 178 NFSV2PROC_NOOP, 179}; 180 181#ifndef NFS_NOSERVER 182/* 183 * Maps errno values to nfs error numbers. 184 * Use NFSERR_IO as the catch all for ones not specifically defined in 185 * RFC 1094. 186 */ 187static u_char nfsrv_v2errmap[ELAST] = { 188 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 191 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 192 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 194 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 201 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 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, 205}; 206 207/* 208 * Maps errno values to nfs error numbers. 209 * Although it is not obvious whether or not NFS clients really care if 210 * a returned error value is in the specified list for the procedure, the 211 * safest thing to do is filter them appropriately. For Version 2, the 212 * X/Open XNFS document is the only specification that defines error values 213 * for each RPC (The RFC simply lists all possible error values for all RPCs), 214 * so I have decided to not do this for Version 2. 215 * The first entry is the default error return and the rest are the valid 216 * errors for that RPC in increasing numeric order. 217 */ 218static short nfsv3err_null[] = { 219 0, 220 0, 221}; 222 223static short nfsv3err_getattr[] = { 224 NFSERR_IO, 225 NFSERR_IO, 226 NFSERR_STALE, 227 NFSERR_BADHANDLE, 228 NFSERR_SERVERFAULT, 229 0, 230}; 231 232static short nfsv3err_setattr[] = { 233 NFSERR_IO, 234 NFSERR_PERM, 235 NFSERR_IO, 236 NFSERR_ACCES, 237 NFSERR_INVAL, 238 NFSERR_NOSPC, 239 NFSERR_ROFS, 240 NFSERR_DQUOT, 241 NFSERR_STALE, 242 NFSERR_BADHANDLE, 243 NFSERR_NOT_SYNC, 244 NFSERR_SERVERFAULT, 245 0, 246}; 247 248static short nfsv3err_lookup[] = { 249 NFSERR_IO, 250 NFSERR_NOENT, 251 NFSERR_IO, 252 NFSERR_ACCES, 253 NFSERR_NOTDIR, 254 NFSERR_NAMETOL, 255 NFSERR_STALE, 256 NFSERR_BADHANDLE, 257 NFSERR_SERVERFAULT, 258 0, 259}; 260 261static short nfsv3err_access[] = { 262 NFSERR_IO, 263 NFSERR_IO, 264 NFSERR_STALE, 265 NFSERR_BADHANDLE, 266 NFSERR_SERVERFAULT, 267 0, 268}; 269 270static short nfsv3err_readlink[] = { 271 NFSERR_IO, 272 NFSERR_IO, 273 NFSERR_ACCES, 274 NFSERR_INVAL, 275 NFSERR_STALE, 276 NFSERR_BADHANDLE, 277 NFSERR_NOTSUPP, 278 NFSERR_SERVERFAULT, 279 0, 280}; 281 282static short nfsv3err_read[] = { 283 NFSERR_IO, 284 NFSERR_IO, 285 NFSERR_NXIO, 286 NFSERR_ACCES, 287 NFSERR_INVAL, 288 NFSERR_STALE, 289 NFSERR_BADHANDLE, 290 NFSERR_SERVERFAULT, 291 0, 292}; 293 294static short nfsv3err_write[] = { 295 NFSERR_IO, 296 NFSERR_IO, 297 NFSERR_ACCES, 298 NFSERR_INVAL, 299 NFSERR_FBIG, 300 NFSERR_NOSPC, 301 NFSERR_ROFS, 302 NFSERR_DQUOT, 303 NFSERR_STALE, 304 NFSERR_BADHANDLE, 305 NFSERR_SERVERFAULT, 306 0, 307}; 308 309static short nfsv3err_create[] = { 310 NFSERR_IO, 311 NFSERR_IO, 312 NFSERR_ACCES, 313 NFSERR_EXIST, 314 NFSERR_NOTDIR, 315 NFSERR_NOSPC, 316 NFSERR_ROFS, 317 NFSERR_NAMETOL, 318 NFSERR_DQUOT, 319 NFSERR_STALE, 320 NFSERR_BADHANDLE, 321 NFSERR_NOTSUPP, 322 NFSERR_SERVERFAULT, 323 0, 324}; 325 326static short nfsv3err_mkdir[] = { 327 NFSERR_IO, 328 NFSERR_IO, 329 NFSERR_ACCES, 330 NFSERR_EXIST, 331 NFSERR_NOTDIR, 332 NFSERR_NOSPC, 333 NFSERR_ROFS, 334 NFSERR_NAMETOL, 335 NFSERR_DQUOT, 336 NFSERR_STALE, 337 NFSERR_BADHANDLE, 338 NFSERR_NOTSUPP, 339 NFSERR_SERVERFAULT, 340 0, 341}; 342 343static short nfsv3err_symlink[] = { 344 NFSERR_IO, 345 NFSERR_IO, 346 NFSERR_ACCES, 347 NFSERR_EXIST, 348 NFSERR_NOTDIR, 349 NFSERR_NOSPC, 350 NFSERR_ROFS, 351 NFSERR_NAMETOL, 352 NFSERR_DQUOT, 353 NFSERR_STALE, 354 NFSERR_BADHANDLE, 355 NFSERR_NOTSUPP, 356 NFSERR_SERVERFAULT, 357 0, 358}; 359 360static short nfsv3err_mknod[] = { 361 NFSERR_IO, 362 NFSERR_IO, 363 NFSERR_ACCES, 364 NFSERR_EXIST, 365 NFSERR_NOTDIR, 366 NFSERR_NOSPC, 367 NFSERR_ROFS, 368 NFSERR_NAMETOL, 369 NFSERR_DQUOT, 370 NFSERR_STALE, 371 NFSERR_BADHANDLE, 372 NFSERR_NOTSUPP, 373 NFSERR_SERVERFAULT, 374 NFSERR_BADTYPE, 375 0, 376}; 377 378static short nfsv3err_remove[] = { 379 NFSERR_IO, 380 NFSERR_NOENT, 381 NFSERR_IO, 382 NFSERR_ACCES, 383 NFSERR_NOTDIR, 384 NFSERR_ROFS, 385 NFSERR_NAMETOL, 386 NFSERR_STALE, 387 NFSERR_BADHANDLE, 388 NFSERR_SERVERFAULT, 389 0, 390}; 391 392static short nfsv3err_rmdir[] = { 393 NFSERR_IO, 394 NFSERR_NOENT, 395 NFSERR_IO, 396 NFSERR_ACCES, 397 NFSERR_EXIST, 398 NFSERR_NOTDIR, 399 NFSERR_INVAL, 400 NFSERR_ROFS, 401 NFSERR_NAMETOL, 402 NFSERR_NOTEMPTY, 403 NFSERR_STALE, 404 NFSERR_BADHANDLE, 405 NFSERR_NOTSUPP, 406 NFSERR_SERVERFAULT, 407 0, 408}; 409 410static short nfsv3err_rename[] = { 411 NFSERR_IO, 412 NFSERR_NOENT, 413 NFSERR_IO, 414 NFSERR_ACCES, 415 NFSERR_EXIST, 416 NFSERR_XDEV, 417 NFSERR_NOTDIR, 418 NFSERR_ISDIR, 419 NFSERR_INVAL, 420 NFSERR_NOSPC, 421 NFSERR_ROFS, 422 NFSERR_MLINK, 423 NFSERR_NAMETOL, 424 NFSERR_NOTEMPTY, 425 NFSERR_DQUOT, 426 NFSERR_STALE, 427 NFSERR_BADHANDLE, 428 NFSERR_NOTSUPP, 429 NFSERR_SERVERFAULT, 430 0, 431}; 432 433static short nfsv3err_link[] = { 434 NFSERR_IO, 435 NFSERR_IO, 436 NFSERR_ACCES, 437 NFSERR_EXIST, 438 NFSERR_XDEV, 439 NFSERR_NOTDIR, 440 NFSERR_INVAL, 441 NFSERR_NOSPC, 442 NFSERR_ROFS, 443 NFSERR_MLINK, 444 NFSERR_NAMETOL, 445 NFSERR_DQUOT, 446 NFSERR_STALE, 447 NFSERR_BADHANDLE, 448 NFSERR_NOTSUPP, 449 NFSERR_SERVERFAULT, 450 0, 451}; 452 453static short nfsv3err_readdir[] = { 454 NFSERR_IO, 455 NFSERR_IO, 456 NFSERR_ACCES, 457 NFSERR_NOTDIR, 458 NFSERR_STALE, 459 NFSERR_BADHANDLE, 460 NFSERR_BAD_COOKIE, 461 NFSERR_TOOSMALL, 462 NFSERR_SERVERFAULT, 463 0, 464}; 465 466static short nfsv3err_readdirplus[] = { 467 NFSERR_IO, 468 NFSERR_IO, 469 NFSERR_ACCES, 470 NFSERR_NOTDIR, 471 NFSERR_STALE, 472 NFSERR_BADHANDLE, 473 NFSERR_BAD_COOKIE, 474 NFSERR_NOTSUPP, 475 NFSERR_TOOSMALL, 476 NFSERR_SERVERFAULT, 477 0, 478}; 479 480static short nfsv3err_fsstat[] = { 481 NFSERR_IO, 482 NFSERR_IO, 483 NFSERR_STALE, 484 NFSERR_BADHANDLE, 485 NFSERR_SERVERFAULT, 486 0, 487}; 488 489static short nfsv3err_fsinfo[] = { 490 NFSERR_STALE, 491 NFSERR_STALE, 492 NFSERR_BADHANDLE, 493 NFSERR_SERVERFAULT, 494 0, 495}; 496 497static short nfsv3err_pathconf[] = { 498 NFSERR_STALE, 499 NFSERR_STALE, 500 NFSERR_BADHANDLE, 501 NFSERR_SERVERFAULT, 502 0, 503}; 504 505static short nfsv3err_commit[] = { 506 NFSERR_IO, 507 NFSERR_IO, 508 NFSERR_STALE, 509 NFSERR_BADHANDLE, 510 NFSERR_SERVERFAULT, 511 0, 512}; 513 514static short *nfsrv_v3errmap[] = { 515 nfsv3err_null, 516 nfsv3err_getattr, 517 nfsv3err_setattr, 518 nfsv3err_lookup, 519 nfsv3err_access, 520 nfsv3err_readlink, 521 nfsv3err_read, 522 nfsv3err_write, 523 nfsv3err_create, 524 nfsv3err_mkdir, 525 nfsv3err_symlink, 526 nfsv3err_mknod, 527 nfsv3err_remove, 528 nfsv3err_rmdir, 529 nfsv3err_rename, 530 nfsv3err_link, 531 nfsv3err_readdir, 532 nfsv3err_readdirplus, 533 nfsv3err_fsstat, 534 nfsv3err_fsinfo, 535 nfsv3err_pathconf, 536 nfsv3err_commit, 537}; 538 539#endif /* NFS_NOSERVER */ 540 541extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 542extern struct nfsrtt nfsrtt; 543extern time_t nqnfsstarttime; 544extern int nqsrv_clockskew; 545extern int nqsrv_writeslack; 546extern int nqsrv_maxlease; 547extern struct nfsstats nfsstats; 548extern int nqnfs_piggy[NFS_NPROCS]; 549extern nfstype nfsv2_type[9]; 550extern nfstype nfsv3_type[9]; 551extern struct nfsnodehashhead *nfsnodehashtbl; 552extern u_long nfsnodehash; 553 554#ifdef VFS_LKM 555struct getfh_args; 556extern int getfh(struct proc *, struct getfh_args *, int *); 557struct nfssvc_args; 558extern int nfssvc(struct proc *, struct nfssvc_args *, int *); 559#endif 560 561LIST_HEAD(nfsnodehashhead, nfsnode); 562 563/* 564 * Create the header for an rpc request packet 565 * The hsiz is the size of the rest of the nfs request header. 566 * (just used to decide if a cluster is a good idea) 567 */ 568struct mbuf * 569nfsm_reqh(vp, procid, hsiz, bposp) 570 struct vnode *vp; 571 u_long procid; 572 int hsiz; 573 caddr_t *bposp; 574{ 575 register struct mbuf *mb; 576 register u_long *tl; 577 register caddr_t bpos; 578 struct mbuf *mb2; 579 struct nfsmount *nmp; 580 int nqflag; 581 582 MGET(mb, M_WAIT, MT_DATA); 583 if (hsiz >= MINCLSIZE) 584 MCLGET(mb, M_WAIT); 585 mb->m_len = 0; 586 bpos = mtod(mb, caddr_t); 587 588 /* 589 * For NQNFS, add lease request. 590 */ 591 if (vp) { 592 nmp = VFSTONFS(vp->v_mount); 593 if (nmp->nm_flag & NFSMNT_NQNFS) { 594 nqflag = NQNFS_NEEDLEASE(vp, procid); 595 if (nqflag) { 596 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 597 *tl++ = txdr_unsigned(nqflag); 598 *tl = txdr_unsigned(nmp->nm_leaseterm); 599 } else { 600 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 601 *tl = 0; 602 } 603 } 604 } 605 /* Finally, return values */ 606 *bposp = bpos; 607 return (mb); 608} 609 610/* 611 * Build the RPC header and fill in the authorization info. 612 * The authorization string argument is only used when the credentials 613 * come from outside of the kernel. 614 * Returns the head of the mbuf list. 615 */ 616struct mbuf * 617nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 618 verf_str, mrest, mrest_len, mbp, xidp) 619 register struct ucred *cr; 620 int nmflag; 621 int procid; 622 int auth_type; 623 int auth_len; 624 char *auth_str; 625 int verf_len; 626 char *verf_str; 627 struct mbuf *mrest; 628 int mrest_len; 629 struct mbuf **mbp; 630 u_long *xidp; 631{ 632 register struct mbuf *mb; 633 register u_long *tl; 634 register caddr_t bpos; 635 register int i; 636 struct mbuf *mreq, *mb2; 637 int siz, grpsiz, authsiz; 638 639 authsiz = nfsm_rndup(auth_len); 640 MGETHDR(mb, M_WAIT, MT_DATA); 641 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 642 MCLGET(mb, M_WAIT); 643 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 644 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 645 } else { 646 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 647 } 648 mb->m_len = 0; 649 mreq = mb; 650 bpos = mtod(mb, caddr_t); 651 652 /* 653 * First the RPC header. 654 */ 655 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 656 if (++nfs_xid == 0) 657 nfs_xid++; 658 *tl++ = *xidp = txdr_unsigned(nfs_xid); 659 *tl++ = rpc_call; 660 *tl++ = rpc_vers; 661 if (nmflag & NFSMNT_NQNFS) { 662 *tl++ = txdr_unsigned(NQNFS_PROG); 663 *tl++ = txdr_unsigned(NQNFS_VER3); 664 } else { 665 *tl++ = txdr_unsigned(NFS_PROG); 666 if (nmflag & NFSMNT_NFSV3) 667 *tl++ = txdr_unsigned(NFS_VER3); 668 else 669 *tl++ = txdr_unsigned(NFS_VER2); 670 } 671 if (nmflag & NFSMNT_NFSV3) 672 *tl++ = txdr_unsigned(procid); 673 else 674 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 675 676 /* 677 * And then the authorization cred. 678 */ 679 *tl++ = txdr_unsigned(auth_type); 680 *tl = txdr_unsigned(authsiz); 681 switch (auth_type) { 682 case RPCAUTH_UNIX: 683 nfsm_build(tl, u_long *, auth_len); 684 *tl++ = 0; /* stamp ?? */ 685 *tl++ = 0; /* NULL hostname */ 686 *tl++ = txdr_unsigned(cr->cr_uid); 687 *tl++ = txdr_unsigned(cr->cr_groups[0]); 688 grpsiz = (auth_len >> 2) - 5; 689 *tl++ = txdr_unsigned(grpsiz); 690 for (i = 1; i <= grpsiz; i++) 691 *tl++ = txdr_unsigned(cr->cr_groups[i]); 692 break; 693 case RPCAUTH_KERB4: 694 siz = auth_len; 695 while (siz > 0) { 696 if (M_TRAILINGSPACE(mb) == 0) { 697 MGET(mb2, M_WAIT, MT_DATA); 698 if (siz >= MINCLSIZE) 699 MCLGET(mb2, M_WAIT); 700 mb->m_next = mb2; 701 mb = mb2; 702 mb->m_len = 0; 703 bpos = mtod(mb, caddr_t); 704 } 705 i = min(siz, M_TRAILINGSPACE(mb)); 706 bcopy(auth_str, bpos, i); 707 mb->m_len += i; 708 auth_str += i; 709 bpos += i; 710 siz -= i; 711 } 712 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 713 for (i = 0; i < siz; i++) 714 *bpos++ = '\0'; 715 mb->m_len += siz; 716 } 717 break; 718 }; 719 720 /* 721 * And the verifier... 722 */ 723 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 724 if (verf_str) { 725 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 726 *tl = txdr_unsigned(verf_len); 727 siz = verf_len; 728 while (siz > 0) { 729 if (M_TRAILINGSPACE(mb) == 0) { 730 MGET(mb2, M_WAIT, MT_DATA); 731 if (siz >= MINCLSIZE) 732 MCLGET(mb2, M_WAIT); 733 mb->m_next = mb2; 734 mb = mb2; 735 mb->m_len = 0; 736 bpos = mtod(mb, caddr_t); 737 } 738 i = min(siz, M_TRAILINGSPACE(mb)); 739 bcopy(verf_str, bpos, i); 740 mb->m_len += i; 741 verf_str += i; 742 bpos += i; 743 siz -= i; 744 } 745 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 746 for (i = 0; i < siz; i++) 747 *bpos++ = '\0'; 748 mb->m_len += siz; 749 } 750 } else { 751 *tl++ = txdr_unsigned(RPCAUTH_NULL); 752 *tl = 0; 753 } 754 mb->m_next = mrest; 755 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 756 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 757 *mbp = mb; 758 return (mreq); 759} 760 761/* 762 * copies mbuf chain to the uio scatter/gather list 763 */ 764int 765nfsm_mbuftouio(mrep, uiop, siz, dpos) 766 struct mbuf **mrep; 767 register struct uio *uiop; 768 int siz; 769 caddr_t *dpos; 770{ 771 register char *mbufcp, *uiocp; 772 register int xfer, left, len; 773 register struct mbuf *mp; 774 long uiosiz, rem; 775 int error = 0; 776 777 mp = *mrep; 778 mbufcp = *dpos; 779 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 780 rem = nfsm_rndup(siz)-siz; 781 while (siz > 0) { 782 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 783 return (EFBIG); 784 left = uiop->uio_iov->iov_len; 785 uiocp = uiop->uio_iov->iov_base; 786 if (left > siz) 787 left = siz; 788 uiosiz = left; 789 while (left > 0) { 790 while (len == 0) { 791 mp = mp->m_next; 792 if (mp == NULL) 793 return (EBADRPC); 794 mbufcp = mtod(mp, caddr_t); 795 len = mp->m_len; 796 } 797 xfer = (left > len) ? len : left; 798#ifdef notdef 799 /* Not Yet.. */ 800 if (uiop->uio_iov->iov_op != NULL) 801 (*(uiop->uio_iov->iov_op)) 802 (mbufcp, uiocp, xfer); 803 else 804#endif 805 if (uiop->uio_segflg == UIO_SYSSPACE) 806 bcopy(mbufcp, uiocp, xfer); 807 else 808 copyout(mbufcp, uiocp, xfer); 809 left -= xfer; 810 len -= xfer; 811 mbufcp += xfer; 812 uiocp += xfer; 813 uiop->uio_offset += xfer; 814 uiop->uio_resid -= xfer; 815 } 816 if (uiop->uio_iov->iov_len <= siz) { 817 uiop->uio_iovcnt--; 818 uiop->uio_iov++; 819 } else { 820 uiop->uio_iov->iov_base += uiosiz; 821 uiop->uio_iov->iov_len -= uiosiz; 822 } 823 siz -= uiosiz; 824 } 825 *dpos = mbufcp; 826 *mrep = mp; 827 if (rem > 0) { 828 if (len < rem) 829 error = nfs_adv(mrep, dpos, rem, len); 830 else 831 *dpos += rem; 832 } 833 return (error); 834} 835 836/* 837 * copies a uio scatter/gather list to an mbuf chain... 838 */ 839int 840nfsm_uiotombuf(uiop, mq, siz, bpos) 841 register struct uio *uiop; 842 struct mbuf **mq; 843 int siz; 844 caddr_t *bpos; 845{ 846 register char *uiocp; 847 register struct mbuf *mp, *mp2; 848 register int xfer, left, mlen; 849 int uiosiz, clflg, rem; 850 char *cp; 851 852 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 853 clflg = 1; 854 else 855 clflg = 0; 856 rem = nfsm_rndup(siz)-siz; 857 mp = mp2 = *mq; 858 while (siz > 0) { 859 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 860 return (EINVAL); 861 left = uiop->uio_iov->iov_len; 862 uiocp = uiop->uio_iov->iov_base; 863 if (left > siz) 864 left = siz; 865 uiosiz = left; 866 while (left > 0) { 867 mlen = M_TRAILINGSPACE(mp); 868 if (mlen == 0) { 869 MGET(mp, M_WAIT, MT_DATA); 870 if (clflg) 871 MCLGET(mp, M_WAIT); 872 mp->m_len = 0; 873 mp2->m_next = mp; 874 mp2 = mp; 875 mlen = M_TRAILINGSPACE(mp); 876 } 877 xfer = (left > mlen) ? mlen : left; 878#ifdef notdef 879 /* Not Yet.. */ 880 if (uiop->uio_iov->iov_op != NULL) 881 (*(uiop->uio_iov->iov_op)) 882 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 883 else 884#endif 885 if (uiop->uio_segflg == UIO_SYSSPACE) 886 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 887 else 888 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 889 mp->m_len += xfer; 890 left -= xfer; 891 uiocp += xfer; 892 uiop->uio_offset += xfer; 893 uiop->uio_resid -= xfer; 894 } 895 if (uiop->uio_iov->iov_len <= siz) { 896 uiop->uio_iovcnt--; 897 uiop->uio_iov++; 898 } else { 899 uiop->uio_iov->iov_base += uiosiz; 900 uiop->uio_iov->iov_len -= uiosiz; 901 } 902 siz -= uiosiz; 903 } 904 if (rem > 0) { 905 if (rem > M_TRAILINGSPACE(mp)) { 906 MGET(mp, M_WAIT, MT_DATA); 907 mp->m_len = 0; 908 mp2->m_next = mp; 909 } 910 cp = mtod(mp, caddr_t)+mp->m_len; 911 for (left = 0; left < rem; left++) 912 *cp++ = '\0'; 913 mp->m_len += rem; 914 *bpos = cp; 915 } else 916 *bpos = mtod(mp, caddr_t)+mp->m_len; 917 *mq = mp; 918 return (0); 919} 920 921/* 922 * Help break down an mbuf chain by setting the first siz bytes contiguous 923 * pointed to by returned val. 924 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 925 * cases. (The macros use the vars. dpos and dpos2) 926 */ 927int 928nfsm_disct(mdp, dposp, siz, left, cp2) 929 struct mbuf **mdp; 930 caddr_t *dposp; 931 int siz; 932 int left; 933 caddr_t *cp2; 934{ 935 register struct mbuf *mp, *mp2; 936 register int siz2, xfer; 937 register caddr_t p; 938 939 mp = *mdp; 940 while (left == 0) { 941 *mdp = mp = mp->m_next; 942 if (mp == NULL) 943 return (EBADRPC); 944 left = mp->m_len; 945 *dposp = mtod(mp, caddr_t); 946 } 947 if (left >= siz) { 948 *cp2 = *dposp; 949 *dposp += siz; 950 } else if (mp->m_next == NULL) { 951 return (EBADRPC); 952 } else if (siz > MHLEN) { 953 panic("nfs S too big"); 954 } else { 955 MGET(mp2, M_WAIT, MT_DATA); 956 mp2->m_next = mp->m_next; 957 mp->m_next = mp2; 958 mp->m_len -= left; 959 mp = mp2; 960 *cp2 = p = mtod(mp, caddr_t); 961 bcopy(*dposp, p, left); /* Copy what was left */ 962 siz2 = siz-left; 963 p += left; 964 mp2 = mp->m_next; 965 /* Loop around copying up the siz2 bytes */ 966 while (siz2 > 0) { 967 if (mp2 == NULL) 968 return (EBADRPC); 969 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 970 if (xfer > 0) { 971 bcopy(mtod(mp2, caddr_t), p, xfer); 972 NFSMADV(mp2, xfer); 973 mp2->m_len -= xfer; 974 p += xfer; 975 siz2 -= xfer; 976 } 977 if (siz2 > 0) 978 mp2 = mp2->m_next; 979 } 980 mp->m_len = siz; 981 *mdp = mp2; 982 *dposp = mtod(mp2, caddr_t); 983 } 984 return (0); 985} 986 987/* 988 * Advance the position in the mbuf chain. 989 */ 990int 991nfs_adv(mdp, dposp, offs, left) 992 struct mbuf **mdp; 993 caddr_t *dposp; 994 int offs; 995 int left; 996{ 997 register struct mbuf *m; 998 register int s; 999 1000 m = *mdp; 1001 s = left; 1002 while (s < offs) { 1003 offs -= s; 1004 m = m->m_next; 1005 if (m == NULL) 1006 return (EBADRPC); 1007 s = m->m_len; 1008 } 1009 *mdp = m; 1010 *dposp = mtod(m, caddr_t)+offs; 1011 return (0); 1012} 1013 1014/* 1015 * Copy a string into mbufs for the hard cases... 1016 */ 1017int 1018nfsm_strtmbuf(mb, bpos, cp, siz) 1019 struct mbuf **mb; 1020 char **bpos; 1021 char *cp; 1022 long siz; 1023{ 1024 register struct mbuf *m1 = 0, *m2; 1025 long left, xfer, len, tlen; 1026 u_long *tl; 1027 int putsize; 1028 1029 putsize = 1; 1030 m2 = *mb; 1031 left = M_TRAILINGSPACE(m2); 1032 if (left > 0) { 1033 tl = ((u_long *)(*bpos)); 1034 *tl++ = txdr_unsigned(siz); 1035 putsize = 0; 1036 left -= NFSX_UNSIGNED; 1037 m2->m_len += NFSX_UNSIGNED; 1038 if (left > 0) { 1039 bcopy(cp, (caddr_t) tl, left); 1040 siz -= left; 1041 cp += left; 1042 m2->m_len += left; 1043 left = 0; 1044 } 1045 } 1046 /* Loop around adding mbufs */ 1047 while (siz > 0) { 1048 MGET(m1, M_WAIT, MT_DATA); 1049 if (siz > MLEN) 1050 MCLGET(m1, M_WAIT); 1051 m1->m_len = NFSMSIZ(m1); 1052 m2->m_next = m1; 1053 m2 = m1; 1054 tl = mtod(m1, u_long *); 1055 tlen = 0; 1056 if (putsize) { 1057 *tl++ = txdr_unsigned(siz); 1058 m1->m_len -= NFSX_UNSIGNED; 1059 tlen = NFSX_UNSIGNED; 1060 putsize = 0; 1061 } 1062 if (siz < m1->m_len) { 1063 len = nfsm_rndup(siz); 1064 xfer = siz; 1065 if (xfer < len) 1066 *(tl+(xfer>>2)) = 0; 1067 } else { 1068 xfer = len = m1->m_len; 1069 } 1070 bcopy(cp, (caddr_t) tl, xfer); 1071 m1->m_len = len+tlen; 1072 siz -= xfer; 1073 cp += xfer; 1074 } 1075 *mb = m1; 1076 *bpos = mtod(m1, caddr_t)+m1->m_len; 1077 return (0); 1078} 1079 1080/* 1081 * Called once to initialize data structures... 1082 */ 1083int 1084nfs_init() 1085{ 1086 register int i; 1087 1088 /* 1089 * Check to see if major data structures haven't bloated. 1090 */ 1091 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1092 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1093 printf("Try reducing NFS_SMALLFH\n"); 1094 } 1095 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1096 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1097 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1098 } 1099 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1100 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1101 printf("Try reducing NFS_UIDHASHSIZ\n"); 1102 } 1103 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1104 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1105 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1106 } 1107 nfsrtt.pos = 0; 1108 rpc_vers = txdr_unsigned(RPC_VER2); 1109 rpc_call = txdr_unsigned(RPC_CALL); 1110 rpc_reply = txdr_unsigned(RPC_REPLY); 1111 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1112 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1113 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1114 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1115 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1116 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1117 nfs_prog = txdr_unsigned(NFS_PROG); 1118 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1119 nfs_true = txdr_unsigned(TRUE); 1120 nfs_false = txdr_unsigned(FALSE); 1121 nfs_xdrneg1 = txdr_unsigned(-1); 1122 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1123 if (nfs_ticks < 1) 1124 nfs_ticks = 1; 1125 /* Ensure async daemons disabled */ 1126 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1127 nfs_iodwant[i] = (struct proc *)0; 1128 TAILQ_INIT(&nfs_bufq); 1129 nfs_nhinit(); /* Init the nfsnode table */ 1130#ifndef NFS_NOSERVER 1131 nfsrv_init(0); /* Init server data structures */ 1132 nfsrv_initcache(); /* Init the server request cache */ 1133#endif 1134 1135 /* 1136 * Initialize the nqnfs server stuff. 1137 */ 1138 if (nqnfsstarttime == 0) { 1139 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1140 + nqsrv_clockskew + nqsrv_writeslack; 1141 NQLOADNOVRAM(nqnfsstarttime); 1142 CIRCLEQ_INIT(&nqtimerhead); 1143 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1144 } 1145 1146 /* 1147 * Initialize reply list and start timer 1148 */ 1149 TAILQ_INIT(&nfs_reqq); 1150#ifndef NFS_NOSERVER 1151 nfs_timer(0); 1152#endif 1153 1154#ifdef __FreeBSD__ 1155 /* 1156 * Set up lease_check and lease_updatetime so that other parts 1157 * of the system can call us, if we are loadable. 1158 */ 1159#ifndef NFS_NOSERVER 1160 lease_check = nfs_lease_check; 1161#endif 1162 lease_updatetime = nfs_lease_updatetime; 1163 vfsconf[MOUNT_NFS]->vfc_refcount++; /* make us non-unloadable */ 1164#ifdef VFS_LKM 1165 sysent[SYS_nfssvc].sy_narg = 2; 1166 sysent[SYS_nfssvc].sy_call = nfssvc; 1167#ifndef NFS_NOSERVER 1168 sysent[SYS_getfh].sy_narg = 2; 1169 sysent[SYS_getfh].sy_call = getfh; 1170#endif 1171#endif 1172#endif 1173 1174 return (0); 1175} 1176 1177/* 1178 * Attribute cache routines. 1179 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1180 * that are on the mbuf list 1181 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1182 * error otherwise 1183 */ 1184 1185/* 1186 * Load the attribute cache (that lives in the nfsnode entry) with 1187 * the values on the mbuf list and 1188 * Iff vap not NULL 1189 * copy the attributes to *vaper 1190 */ 1191int 1192nfs_loadattrcache(vpp, mdp, dposp, vaper) 1193 struct vnode **vpp; 1194 struct mbuf **mdp; 1195 caddr_t *dposp; 1196 struct vattr *vaper; 1197{ 1198 register struct vnode *vp = *vpp; 1199 register struct vattr *vap; 1200 register struct nfs_fattr *fp; 1201 register struct nfsnode *np; 1202 register struct nfsnodehashhead *nhpp; 1203 register long t1; 1204 caddr_t cp2; 1205 int error = 0, rdev; 1206 struct mbuf *md; 1207 enum vtype vtyp; 1208 u_short vmode; 1209 struct timespec mtime; 1210 struct vnode *nvp; 1211 int v3 = NFS_ISV3(vp); 1212 1213 md = *mdp; 1214 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1215 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1216 return (error); 1217 fp = (struct nfs_fattr *)cp2; 1218 if (v3) { 1219 vtyp = nfsv3tov_type(fp->fa_type); 1220 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1221 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1222 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1223 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1224 } else { 1225 vtyp = nfsv2tov_type(fp->fa_type); 1226 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1227 /* 1228 * XXX 1229 * 1230 * The duplicate information returned in fa_type and fa_mode 1231 * is an ambiguity in the NFS version 2 protocol. 1232 * 1233 * VREG should be taken literally as a regular file. If a 1234 * server intents to return some type information differently 1235 * in the upper bits of the mode field (e.g. for sockets, or 1236 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1237 * leave the examination of the mode bits even in the VREG 1238 * case to avoid breakage for bogus servers, but we make sure 1239 * that there are actually type bits set in the upper part of 1240 * fa_mode (and failing that, trust the va_type field). 1241 * 1242 * NFSv3 cleared the issue, and requires fa_mode to not 1243 * contain any type information (while also introduing sockets 1244 * and FIFOs for fa_type). 1245 */ 1246 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1247 vtyp = IFTOVT(vmode); 1248 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1249 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1250 1251 /* 1252 * Really ugly NFSv2 kludge. 1253 */ 1254 if (vtyp == VCHR && rdev == 0xffffffff) 1255 vtyp = VFIFO; 1256 } 1257 1258 /* 1259 * If v_type == VNON it is a new node, so fill in the v_type, 1260 * n_mtime fields. Check to see if it represents a special 1261 * device, and if so, check for a possible alias. Once the 1262 * correct vnode has been obtained, fill in the rest of the 1263 * information. 1264 */ 1265 np = VTONFS(vp); 1266 if (vp->v_type != vtyp) { 1267 /* 1268 * If we had a lock and it turns out that the vnode 1269 * is an object which we don't want to lock (e.g. VDIR) 1270 * to avoid nasty hanging problems on a server crash, 1271 * then release it here. 1272 */ 1273 if (vtyp != VREG && VOP_ISLOCKED(vp)) 1274 VOP_UNLOCK(vp); 1275 vp->v_type = vtyp; 1276 if (vp->v_type == VFIFO) { 1277 vp->v_op = fifo_nfsv2nodeop_p; 1278 } 1279 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1280 vp->v_op = spec_nfsv2nodeop_p; 1281 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1282 if (nvp) { 1283 /* 1284 * Discard unneeded vnode, but save its nfsnode. 1285 */ 1286 LIST_REMOVE(np, n_hash); 1287 nvp->v_data = vp->v_data; 1288 vp->v_data = NULL; 1289 vp->v_op = spec_vnodeop_p; 1290 vrele(vp); 1291 vgone(vp); 1292 /* 1293 * Reinitialize aliased node. 1294 */ 1295 np->n_vnode = nvp; 1296 nhpp = NFSNOHASH(nfs_hash(np->n_fhp, np->n_fhsize)); 1297 LIST_INSERT_HEAD(nhpp, np, n_hash); 1298 *vpp = vp = nvp; 1299 } 1300 } 1301 np->n_mtime = mtime.ts_sec; 1302 } 1303 vap = &np->n_vattr; 1304 vap->va_type = vtyp; 1305 vap->va_mode = (vmode & 07777); 1306 vap->va_rdev = (dev_t)rdev; 1307 vap->va_mtime = mtime; 1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1309 if (v3) { 1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1313 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1314 vap->va_blocksize = NFS_FABLKSIZE; 1315 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1316 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1317 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1318 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1319 vap->va_flags = 0; 1320 vap->va_filerev = 0; 1321 } else { 1322 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1323 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1324 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1325 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1326 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1327 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1328 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1329 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1330 vap->va_flags = 0; 1331 vap->va_ctime.ts_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1332 vap->va_ctime.ts_nsec = 0; 1333 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1334 vap->va_filerev = 0; 1335 } 1336 if (vap->va_size != np->n_size) { 1337 if (vap->va_type == VREG) { 1338 if (np->n_flag & NMODIFIED) { 1339 if (vap->va_size < np->n_size) 1340 vap->va_size = np->n_size; 1341 else 1342 np->n_size = vap->va_size; 1343 } else 1344 np->n_size = vap->va_size; 1345 vnode_pager_setsize(vp, (u_long)np->n_size); 1346 } else 1347 np->n_size = vap->va_size; 1348 } 1349 np->n_attrstamp = time.tv_sec; 1350 if (vaper != NULL) { 1351 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1352 if (np->n_flag & NCHG) { 1353 if (np->n_flag & NACC) 1354 vaper->va_atime = np->n_atim; 1355 if (np->n_flag & NUPD) 1356 vaper->va_mtime = np->n_mtim; 1357 } 1358 } 1359 return (0); 1360} 1361 1362/* 1363 * Check the time stamp 1364 * If the cache is valid, copy contents to *vap and return 0 1365 * otherwise return an error 1366 */ 1367int 1368nfs_getattrcache(vp, vaper) 1369 register struct vnode *vp; 1370 struct vattr *vaper; 1371{ 1372 register struct nfsnode *np = VTONFS(vp); 1373 register struct vattr *vap; 1374 1375 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1376 nfsstats.attrcache_misses++; 1377 return (ENOENT); 1378 } 1379 nfsstats.attrcache_hits++; 1380 vap = &np->n_vattr; 1381 if (vap->va_size != np->n_size) { 1382 if (vap->va_type == VREG) { 1383 if (np->n_flag & NMODIFIED) { 1384 if (vap->va_size < np->n_size) 1385 vap->va_size = np->n_size; 1386 else 1387 np->n_size = vap->va_size; 1388 } else 1389 np->n_size = vap->va_size; 1390 vnode_pager_setsize(vp, (u_long)np->n_size); 1391 } else 1392 np->n_size = vap->va_size; 1393 } 1394 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1395 if (np->n_flag & NCHG) { 1396 if (np->n_flag & NACC) 1397 vaper->va_atime = np->n_atim; 1398 if (np->n_flag & NUPD) 1399 vaper->va_mtime = np->n_mtim; 1400 } 1401 return (0); 1402} 1403 1404#ifndef NFS_NOSERVER 1405/* 1406 * Set up nameidata for a lookup() call and do it 1407 */ 1408int 1409nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag) 1410 register struct nameidata *ndp; 1411 fhandle_t *fhp; 1412 int len; 1413 struct nfssvc_sock *slp; 1414 struct mbuf *nam; 1415 struct mbuf **mdp; 1416 caddr_t *dposp; 1417 struct vnode **retdirp; 1418 struct proc *p; 1419 int kerbflag; 1420{ 1421 register int i, rem; 1422 register struct mbuf *md; 1423 register char *fromcp, *tocp; 1424 struct vnode *dp; 1425 int error, rdonly; 1426 struct componentname *cnp = &ndp->ni_cnd; 1427 1428 *retdirp = (struct vnode *)0; 1429 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1430 /* 1431 * Copy the name from the mbuf list to ndp->ni_pnbuf 1432 * and set the various ndp fields appropriately. 1433 */ 1434 fromcp = *dposp; 1435 tocp = cnp->cn_pnbuf; 1436 md = *mdp; 1437 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1438 cnp->cn_hash = 0; 1439 for (i = 0; i < len; i++) { 1440 while (rem == 0) { 1441 md = md->m_next; 1442 if (md == NULL) { 1443 error = EBADRPC; 1444 goto out; 1445 } 1446 fromcp = mtod(md, caddr_t); 1447 rem = md->m_len; 1448 } 1449 if (*fromcp == '\0' || *fromcp == '/') { 1450 error = EACCES; 1451 goto out; 1452 } 1453 cnp->cn_hash += (unsigned char)*fromcp; 1454 *tocp++ = *fromcp++; 1455 rem--; 1456 } 1457 *tocp = '\0'; 1458 *mdp = md; 1459 *dposp = fromcp; 1460 len = nfsm_rndup(len)-len; 1461 if (len > 0) { 1462 if (rem >= len) 1463 *dposp += len; 1464 else if (error = nfs_adv(mdp, dposp, len, rem)) 1465 goto out; 1466 } 1467 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1468 cnp->cn_nameptr = cnp->cn_pnbuf; 1469 /* 1470 * Extract and set starting directory. 1471 */ 1472 if (error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1473 nam, &rdonly, kerbflag)) 1474 goto out; 1475 if (dp->v_type != VDIR) { 1476 nfsrv_vrele(dp); 1477 error = ENOTDIR; 1478 goto out; 1479 } 1480 VREF(dp); 1481 *retdirp = dp; 1482 ndp->ni_startdir = dp; 1483 if (rdonly) 1484 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1485 else 1486 cnp->cn_flags |= NOCROSSMOUNT; 1487 /* 1488 * And call lookup() to do the real work 1489 */ 1490 cnp->cn_proc = p; 1491 if (error = lookup(ndp)) 1492 goto out; 1493 /* 1494 * Check for encountering a symbolic link 1495 */ 1496 if (cnp->cn_flags & ISSYMLINK) { 1497 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1498 vput(ndp->ni_dvp); 1499 else 1500 vrele(ndp->ni_dvp); 1501 vput(ndp->ni_vp); 1502 ndp->ni_vp = NULL; 1503 error = EINVAL; 1504 goto out; 1505 } 1506 1507 nfsrv_vmio(ndp->ni_vp); 1508 1509 /* 1510 * Check for saved name request 1511 */ 1512 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1513 cnp->cn_flags |= HASBUF; 1514 return (0); 1515 } 1516out: 1517 FREE(cnp->cn_pnbuf, M_NAMEI); 1518 return (error); 1519} 1520 1521/* 1522 * A fiddled version of m_adj() that ensures null fill to a long 1523 * boundary and only trims off the back end 1524 */ 1525void 1526nfsm_adj(mp, len, nul) 1527 struct mbuf *mp; 1528 register int len; 1529 int nul; 1530{ 1531 register struct mbuf *m; 1532 register int count, i; 1533 register char *cp; 1534 1535 /* 1536 * Trim from tail. Scan the mbuf chain, 1537 * calculating its length and finding the last mbuf. 1538 * If the adjustment only affects this mbuf, then just 1539 * adjust and return. Otherwise, rescan and truncate 1540 * after the remaining size. 1541 */ 1542 count = 0; 1543 m = mp; 1544 for (;;) { 1545 count += m->m_len; 1546 if (m->m_next == (struct mbuf *)0) 1547 break; 1548 m = m->m_next; 1549 } 1550 if (m->m_len > len) { 1551 m->m_len -= len; 1552 if (nul > 0) { 1553 cp = mtod(m, caddr_t)+m->m_len-nul; 1554 for (i = 0; i < nul; i++) 1555 *cp++ = '\0'; 1556 } 1557 return; 1558 } 1559 count -= len; 1560 if (count < 0) 1561 count = 0; 1562 /* 1563 * Correct length for chain is "count". 1564 * Find the mbuf with last data, adjust its length, 1565 * and toss data from remaining mbufs on chain. 1566 */ 1567 for (m = mp; m; m = m->m_next) { 1568 if (m->m_len >= count) { 1569 m->m_len = count; 1570 if (nul > 0) { 1571 cp = mtod(m, caddr_t)+m->m_len-nul; 1572 for (i = 0; i < nul; i++) 1573 *cp++ = '\0'; 1574 } 1575 break; 1576 } 1577 count -= m->m_len; 1578 } 1579 for (m = m->m_next;m;m = m->m_next) 1580 m->m_len = 0; 1581} 1582 1583/* 1584 * Make these functions instead of macros, so that the kernel text size 1585 * doesn't get too big... 1586 */ 1587void 1588nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1589 struct nfsrv_descript *nfsd; 1590 int before_ret; 1591 register struct vattr *before_vap; 1592 int after_ret; 1593 struct vattr *after_vap; 1594 struct mbuf **mbp; 1595 char **bposp; 1596{ 1597 register struct mbuf *mb = *mbp, *mb2; 1598 register char *bpos = *bposp; 1599 register u_long *tl; 1600 1601 if (before_ret) { 1602 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1603 *tl = nfs_false; 1604 } else { 1605 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1606 *tl++ = nfs_true; 1607 txdr_hyper(&(before_vap->va_size), tl); 1608 tl += 2; 1609 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1610 tl += 2; 1611 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1612 } 1613 *bposp = bpos; 1614 *mbp = mb; 1615 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1616} 1617 1618void 1619nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1620 struct nfsrv_descript *nfsd; 1621 int after_ret; 1622 struct vattr *after_vap; 1623 struct mbuf **mbp; 1624 char **bposp; 1625{ 1626 register struct mbuf *mb = *mbp, *mb2; 1627 register char *bpos = *bposp; 1628 register u_long *tl; 1629 register struct nfs_fattr *fp; 1630 1631 if (after_ret) { 1632 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1633 *tl = nfs_false; 1634 } else { 1635 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1636 *tl++ = nfs_true; 1637 fp = (struct nfs_fattr *)tl; 1638 nfsm_srvfattr(nfsd, after_vap, fp); 1639 } 1640 *mbp = mb; 1641 *bposp = bpos; 1642} 1643 1644void 1645nfsm_srvfattr(nfsd, vap, fp) 1646 register struct nfsrv_descript *nfsd; 1647 register struct vattr *vap; 1648 register struct nfs_fattr *fp; 1649{ 1650 1651 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1652 fp->fa_uid = txdr_unsigned(vap->va_uid); 1653 fp->fa_gid = txdr_unsigned(vap->va_gid); 1654 if (nfsd->nd_flag & ND_NFSV3) { 1655 fp->fa_type = vtonfsv3_type(vap->va_type); 1656 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1657 txdr_hyper(&vap->va_size, &fp->fa3_size); 1658 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1659 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1660 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1661 fp->fa3_fsid.nfsuquad[0] = 0; 1662 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1663 fp->fa3_fileid.nfsuquad[0] = 0; 1664 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1665 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1666 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1667 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1668 } else { 1669 fp->fa_type = vtonfsv2_type(vap->va_type); 1670 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1671 fp->fa2_size = txdr_unsigned(vap->va_size); 1672 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1673 if (vap->va_type == VFIFO) 1674 fp->fa2_rdev = 0xffffffff; 1675 else 1676 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1677 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1678 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1679 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1680 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1681 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1682 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1683 } 1684} 1685 1686/* 1687 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1688 * - look up fsid in mount list (if not found ret error) 1689 * - get vp and export rights by calling VFS_FHTOVP() 1690 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1691 * - if not lockflag unlock it with VOP_UNLOCK() 1692 */ 1693int 1694nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag) 1695 fhandle_t *fhp; 1696 int lockflag; 1697 struct vnode **vpp; 1698 struct ucred *cred; 1699 struct nfssvc_sock *slp; 1700 struct mbuf *nam; 1701 int *rdonlyp; 1702 int kerbflag; 1703{ 1704 register struct mount *mp; 1705 register int i; 1706 struct ucred *credanon; 1707 int error, exflags; 1708 1709 *vpp = (struct vnode *)0; 1710 mp = getvfs(&fhp->fh_fsid); 1711 if (!mp) 1712 return (ESTALE); 1713 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1714 if (error) 1715 return (error); 1716 /* 1717 * Check/setup credentials. 1718 */ 1719 if (exflags & MNT_EXKERB) { 1720 if (!kerbflag) { 1721 vput(*vpp); 1722 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1723 } 1724 } else if (kerbflag) { 1725 vput(*vpp); 1726 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1727 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1728 cred->cr_uid = credanon->cr_uid; 1729 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1730 cred->cr_groups[i] = credanon->cr_groups[i]; 1731 cred->cr_ngroups = i; 1732 } 1733 if (exflags & MNT_EXRDONLY) 1734 *rdonlyp = 1; 1735 else 1736 *rdonlyp = 0; 1737 1738 nfsrv_vmio(*vpp); 1739 1740 if (!lockflag) 1741 VOP_UNLOCK(*vpp); 1742 return (0); 1743} 1744 1745#endif /* NFS_NOSERVER */ 1746/* 1747 * This function compares two net addresses by family and returns TRUE 1748 * if they are the same host. 1749 * If there is any doubt, return FALSE. 1750 * The AF_INET family is handled as a special case so that address mbufs 1751 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1752 */ 1753int 1754netaddr_match(family, haddr, nam) 1755 int family; 1756 union nethostaddr *haddr; 1757 struct mbuf *nam; 1758{ 1759 register struct sockaddr_in *inetaddr; 1760 1761 switch (family) { 1762 case AF_INET: 1763 inetaddr = mtod(nam, struct sockaddr_in *); 1764 if (inetaddr->sin_family == AF_INET && 1765 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1766 return (1); 1767 break; 1768#ifdef ISO 1769 case AF_ISO: 1770 { 1771 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1772 1773 isoaddr1 = mtod(nam, struct sockaddr_iso *); 1774 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 1775 if (isoaddr1->siso_family == AF_ISO && 1776 isoaddr1->siso_nlen > 0 && 1777 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1778 SAME_ISOADDR(isoaddr1, isoaddr2)) 1779 return (1); 1780 break; 1781 } 1782#endif /* ISO */ 1783 default: 1784 break; 1785 }; 1786 return (0); 1787} 1788 1789static nfsuint64 nfs_nullcookie = { 0, 0 }; 1790/* 1791 * This function finds the directory cookie that corresponds to the 1792 * logical byte offset given. 1793 */ 1794nfsuint64 * 1795nfs_getcookie(np, off, add) 1796 register struct nfsnode *np; 1797 off_t off; 1798 int add; 1799{ 1800 register struct nfsdmap *dp, *dp2; 1801 register int pos; 1802 1803 pos = off / NFS_DIRBLKSIZ; 1804 if (pos == 0) { 1805#ifdef DIAGNOSTIC 1806 if (add) 1807 panic("nfs getcookie add at 0"); 1808#endif 1809 return (&nfs_nullcookie); 1810 } 1811 pos--; 1812 dp = np->n_cookies.lh_first; 1813 if (!dp) { 1814 if (add) { 1815 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1816 M_NFSDIROFF, M_WAITOK); 1817 dp->ndm_eocookie = 0; 1818 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1819 } else 1820 return ((nfsuint64 *)0); 1821 } 1822 while (pos >= NFSNUMCOOKIES) { 1823 pos -= NFSNUMCOOKIES; 1824 if (dp->ndm_list.le_next) { 1825 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1826 pos >= dp->ndm_eocookie) 1827 return ((nfsuint64 *)0); 1828 dp = dp->ndm_list.le_next; 1829 } else if (add) { 1830 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1831 M_NFSDIROFF, M_WAITOK); 1832 dp2->ndm_eocookie = 0; 1833 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1834 dp = dp2; 1835 } else 1836 return ((nfsuint64 *)0); 1837 } 1838 if (pos >= dp->ndm_eocookie) { 1839 if (add) 1840 dp->ndm_eocookie = pos + 1; 1841 else 1842 return ((nfsuint64 *)0); 1843 } 1844 return (&dp->ndm_cookies[pos]); 1845} 1846 1847/* 1848 * Invalidate cached directory information, except for the actual directory 1849 * blocks (which are invalidated separately). 1850 * Done mainly to avoid the use of stale offset cookies. 1851 */ 1852void 1853nfs_invaldir(vp) 1854 register struct vnode *vp; 1855{ 1856 register struct nfsnode *np = VTONFS(vp); 1857 1858#ifdef DIAGNOSTIC 1859 if (vp->v_type != VDIR) 1860 panic("nfs: invaldir not dir"); 1861#endif 1862 np->n_direofoffset = 0; 1863 np->n_cookieverf.nfsuquad[0] = 0; 1864 np->n_cookieverf.nfsuquad[1] = 0; 1865 if (np->n_cookies.lh_first) 1866 np->n_cookies.lh_first->ndm_eocookie = 0; 1867} 1868 1869/* 1870 * The write verifier has changed (probably due to a server reboot), so all 1871 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1872 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1873 * flag. Once done the new write verifier can be set for the mount point. 1874 */ 1875void 1876nfs_clearcommit(mp) 1877 struct mount *mp; 1878{ 1879 register struct vnode *vp, *nvp; 1880 register struct buf *bp, *nbp; 1881 int s; 1882 1883 s = splbio(); 1884loop: 1885 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 1886 if (vp->v_mount != mp) /* Paranoia */ 1887 goto loop; 1888 nvp = vp->v_mntvnodes.le_next; 1889 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 1890 nbp = bp->b_vnbufs.le_next; 1891 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1892 == (B_DELWRI | B_NEEDCOMMIT)) 1893 bp->b_flags &= ~B_NEEDCOMMIT; 1894 } 1895 } 1896 splx(s); 1897} 1898 1899#ifndef NFS_NOSERVER 1900/* 1901 * Map errnos to NFS error numbers. For Version 3 also filter out error 1902 * numbers not specified for the associated procedure. 1903 */ 1904int 1905nfsrv_errmap(nd, err) 1906 struct nfsrv_descript *nd; 1907 register int err; 1908{ 1909 register short *defaulterrp, *errp; 1910 1911 if (nd->nd_flag & ND_NFSV3) { 1912 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1913 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1914 while (*++errp) { 1915 if (*errp == err) 1916 return (err); 1917 else if (*errp > err) 1918 break; 1919 } 1920 return ((int)*defaulterrp); 1921 } else 1922 return (err & 0xffff); 1923 } 1924 if (err <= ELAST) 1925 return ((int)nfsrv_v2errmap[err - 1]); 1926 return (NFSERR_IO); 1927} 1928 1929int 1930nfsrv_vmio(struct vnode *vp) { 1931 vm_object_t object; 1932 1933 if ((vp == NULL) || (vp->v_type != VREG)) 1934 return 1; 1935 1936retry: 1937 if ((vp->v_flag & VVMIO) == 0) { 1938 struct vattr vat; 1939 struct proc *p = curproc; 1940 1941 if (VOP_GETATTR(vp, &vat, p->p_ucred, p) != 0) 1942 panic("nfsrv_vmio: VOP_GETATTR failed"); 1943 1944 (void) vnode_pager_alloc(vp, vat.va_size, 0, 0); 1945 1946 vp->v_flag |= VVMIO; 1947 } else { 1948 if ((object = vp->v_object) && 1949 (object->flags & OBJ_DEAD)) { 1950 tsleep(object, PVM, "nfdead", 0); 1951 goto retry; 1952 } 1953 if (!object) 1954 panic("nfsrv_vmio: VMIO object missing"); 1955 vm_object_reference(object); 1956 } 1957 return 0; 1958} 1959int 1960nfsrv_vput(struct vnode *vp) { 1961 if ((vp->v_flag & VVMIO) && vp->v_object) { 1962 vput(vp); 1963 vm_object_deallocate(vp->v_object); 1964 } else { 1965 vput(vp); 1966 } 1967 return 0; 1968} 1969int 1970nfsrv_vrele(struct vnode *vp) { 1971 if ((vp->v_flag & VVMIO) && vp->v_object) { 1972 vrele(vp); 1973 vm_object_deallocate(vp->v_object); 1974 } else { 1975 vrele(vp); 1976 } 1977 return 0; 1978} 1979#endif /* NFS_NOSERVER */ 1980