nfs_common.c revision 17186
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 1.30 1996/06/23 17:19:25 bde 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 struct timeval tv; 639 static u_long base; 640 641 authsiz = nfsm_rndup(auth_len); 642 MGETHDR(mb, M_WAIT, MT_DATA); 643 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 644 MCLGET(mb, M_WAIT); 645 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 646 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 647 } else { 648 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 649 } 650 mb->m_len = 0; 651 mreq = mb; 652 bpos = mtod(mb, caddr_t); 653 654 /* 655 * First the RPC header. 656 */ 657 nfsm_build(tl, u_long *, 8 * NFSX_UNSIGNED); 658 659 /* 660 * derive initial xid from system time 661 * XXX time is invalid if root not yet mounted 662 */ 663 if (!base && (rootvp)) { 664 microtime(&tv); 665 base = tv.tv_sec << 12; 666 nfs_xid = base; 667 } 668 /* 669 * Skip zero xid if it should ever happen. 670 */ 671 if (++nfs_xid == 0) 672 nfs_xid++; 673 674 *tl++ = *xidp = txdr_unsigned(nfs_xid); 675 *tl++ = rpc_call; 676 *tl++ = rpc_vers; 677 if (nmflag & NFSMNT_NQNFS) { 678 *tl++ = txdr_unsigned(NQNFS_PROG); 679 *tl++ = txdr_unsigned(NQNFS_VER3); 680 } else { 681 *tl++ = txdr_unsigned(NFS_PROG); 682 if (nmflag & NFSMNT_NFSV3) 683 *tl++ = txdr_unsigned(NFS_VER3); 684 else 685 *tl++ = txdr_unsigned(NFS_VER2); 686 } 687 if (nmflag & NFSMNT_NFSV3) 688 *tl++ = txdr_unsigned(procid); 689 else 690 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 691 692 /* 693 * And then the authorization cred. 694 */ 695 *tl++ = txdr_unsigned(auth_type); 696 *tl = txdr_unsigned(authsiz); 697 switch (auth_type) { 698 case RPCAUTH_UNIX: 699 nfsm_build(tl, u_long *, auth_len); 700 *tl++ = 0; /* stamp ?? */ 701 *tl++ = 0; /* NULL hostname */ 702 *tl++ = txdr_unsigned(cr->cr_uid); 703 *tl++ = txdr_unsigned(cr->cr_groups[0]); 704 grpsiz = (auth_len >> 2) - 5; 705 *tl++ = txdr_unsigned(grpsiz); 706 for (i = 1; i <= grpsiz; i++) 707 *tl++ = txdr_unsigned(cr->cr_groups[i]); 708 break; 709 case RPCAUTH_KERB4: 710 siz = auth_len; 711 while (siz > 0) { 712 if (M_TRAILINGSPACE(mb) == 0) { 713 MGET(mb2, M_WAIT, MT_DATA); 714 if (siz >= MINCLSIZE) 715 MCLGET(mb2, M_WAIT); 716 mb->m_next = mb2; 717 mb = mb2; 718 mb->m_len = 0; 719 bpos = mtod(mb, caddr_t); 720 } 721 i = min(siz, M_TRAILINGSPACE(mb)); 722 bcopy(auth_str, bpos, i); 723 mb->m_len += i; 724 auth_str += i; 725 bpos += i; 726 siz -= i; 727 } 728 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 729 for (i = 0; i < siz; i++) 730 *bpos++ = '\0'; 731 mb->m_len += siz; 732 } 733 break; 734 }; 735 736 /* 737 * And the verifier... 738 */ 739 nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); 740 if (verf_str) { 741 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 742 *tl = txdr_unsigned(verf_len); 743 siz = verf_len; 744 while (siz > 0) { 745 if (M_TRAILINGSPACE(mb) == 0) { 746 MGET(mb2, M_WAIT, MT_DATA); 747 if (siz >= MINCLSIZE) 748 MCLGET(mb2, M_WAIT); 749 mb->m_next = mb2; 750 mb = mb2; 751 mb->m_len = 0; 752 bpos = mtod(mb, caddr_t); 753 } 754 i = min(siz, M_TRAILINGSPACE(mb)); 755 bcopy(verf_str, bpos, i); 756 mb->m_len += i; 757 verf_str += i; 758 bpos += i; 759 siz -= i; 760 } 761 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 762 for (i = 0; i < siz; i++) 763 *bpos++ = '\0'; 764 mb->m_len += siz; 765 } 766 } else { 767 *tl++ = txdr_unsigned(RPCAUTH_NULL); 768 *tl = 0; 769 } 770 mb->m_next = mrest; 771 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 772 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 773 *mbp = mb; 774 return (mreq); 775} 776 777/* 778 * copies mbuf chain to the uio scatter/gather list 779 */ 780int 781nfsm_mbuftouio(mrep, uiop, siz, dpos) 782 struct mbuf **mrep; 783 register struct uio *uiop; 784 int siz; 785 caddr_t *dpos; 786{ 787 register char *mbufcp, *uiocp; 788 register int xfer, left, len; 789 register struct mbuf *mp; 790 long uiosiz, rem; 791 int error = 0; 792 793 mp = *mrep; 794 mbufcp = *dpos; 795 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 796 rem = nfsm_rndup(siz)-siz; 797 while (siz > 0) { 798 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 799 return (EFBIG); 800 left = uiop->uio_iov->iov_len; 801 uiocp = uiop->uio_iov->iov_base; 802 if (left > siz) 803 left = siz; 804 uiosiz = left; 805 while (left > 0) { 806 while (len == 0) { 807 mp = mp->m_next; 808 if (mp == NULL) 809 return (EBADRPC); 810 mbufcp = mtod(mp, caddr_t); 811 len = mp->m_len; 812 } 813 xfer = (left > len) ? len : left; 814#ifdef notdef 815 /* Not Yet.. */ 816 if (uiop->uio_iov->iov_op != NULL) 817 (*(uiop->uio_iov->iov_op)) 818 (mbufcp, uiocp, xfer); 819 else 820#endif 821 if (uiop->uio_segflg == UIO_SYSSPACE) 822 bcopy(mbufcp, uiocp, xfer); 823 else 824 copyout(mbufcp, uiocp, xfer); 825 left -= xfer; 826 len -= xfer; 827 mbufcp += xfer; 828 uiocp += xfer; 829 uiop->uio_offset += xfer; 830 uiop->uio_resid -= xfer; 831 } 832 if (uiop->uio_iov->iov_len <= siz) { 833 uiop->uio_iovcnt--; 834 uiop->uio_iov++; 835 } else { 836 uiop->uio_iov->iov_base += uiosiz; 837 uiop->uio_iov->iov_len -= uiosiz; 838 } 839 siz -= uiosiz; 840 } 841 *dpos = mbufcp; 842 *mrep = mp; 843 if (rem > 0) { 844 if (len < rem) 845 error = nfs_adv(mrep, dpos, rem, len); 846 else 847 *dpos += rem; 848 } 849 return (error); 850} 851 852/* 853 * copies a uio scatter/gather list to an mbuf chain. 854 * NOTE: can ony handle iovcnt == 1 855 */ 856int 857nfsm_uiotombuf(uiop, mq, siz, bpos) 858 register struct uio *uiop; 859 struct mbuf **mq; 860 int siz; 861 caddr_t *bpos; 862{ 863 register char *uiocp; 864 register struct mbuf *mp, *mp2; 865 register int xfer, left, mlen; 866 int uiosiz, clflg, rem; 867 char *cp; 868 869 if (uiop->uio_iovcnt != 1) 870 panic("nfsm_uiotombuf: iovcnt != 1"); 871 872 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 873 clflg = 1; 874 else 875 clflg = 0; 876 rem = nfsm_rndup(siz)-siz; 877 mp = mp2 = *mq; 878 while (siz > 0) { 879 left = uiop->uio_iov->iov_len; 880 uiocp = uiop->uio_iov->iov_base; 881 if (left > siz) 882 left = siz; 883 uiosiz = left; 884 while (left > 0) { 885 mlen = M_TRAILINGSPACE(mp); 886 if (mlen == 0) { 887 MGET(mp, M_WAIT, MT_DATA); 888 if (clflg) 889 MCLGET(mp, M_WAIT); 890 mp->m_len = 0; 891 mp2->m_next = mp; 892 mp2 = mp; 893 mlen = M_TRAILINGSPACE(mp); 894 } 895 xfer = (left > mlen) ? mlen : left; 896#ifdef notdef 897 /* Not Yet.. */ 898 if (uiop->uio_iov->iov_op != NULL) 899 (*(uiop->uio_iov->iov_op)) 900 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 901 else 902#endif 903 if (uiop->uio_segflg == UIO_SYSSPACE) 904 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 905 else 906 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 907 mp->m_len += xfer; 908 left -= xfer; 909 uiocp += xfer; 910 uiop->uio_offset += xfer; 911 uiop->uio_resid -= xfer; 912 } 913 uiop->uio_iov->iov_base += uiosiz; 914 uiop->uio_iov->iov_len -= uiosiz; 915 siz -= uiosiz; 916 } 917 if (rem > 0) { 918 if (rem > M_TRAILINGSPACE(mp)) { 919 MGET(mp, M_WAIT, MT_DATA); 920 mp->m_len = 0; 921 mp2->m_next = mp; 922 } 923 cp = mtod(mp, caddr_t)+mp->m_len; 924 for (left = 0; left < rem; left++) 925 *cp++ = '\0'; 926 mp->m_len += rem; 927 *bpos = cp; 928 } else 929 *bpos = mtod(mp, caddr_t)+mp->m_len; 930 *mq = mp; 931 return (0); 932} 933 934/* 935 * Help break down an mbuf chain by setting the first siz bytes contiguous 936 * pointed to by returned val. 937 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 938 * cases. (The macros use the vars. dpos and dpos2) 939 */ 940int 941nfsm_disct(mdp, dposp, siz, left, cp2) 942 struct mbuf **mdp; 943 caddr_t *dposp; 944 int siz; 945 int left; 946 caddr_t *cp2; 947{ 948 register struct mbuf *mp, *mp2; 949 register int siz2, xfer; 950 register caddr_t p; 951 952 mp = *mdp; 953 while (left == 0) { 954 *mdp = mp = mp->m_next; 955 if (mp == NULL) 956 return (EBADRPC); 957 left = mp->m_len; 958 *dposp = mtod(mp, caddr_t); 959 } 960 if (left >= siz) { 961 *cp2 = *dposp; 962 *dposp += siz; 963 } else if (mp->m_next == NULL) { 964 return (EBADRPC); 965 } else if (siz > MHLEN) { 966 panic("nfs S too big"); 967 } else { 968 MGET(mp2, M_WAIT, MT_DATA); 969 mp2->m_next = mp->m_next; 970 mp->m_next = mp2; 971 mp->m_len -= left; 972 mp = mp2; 973 *cp2 = p = mtod(mp, caddr_t); 974 bcopy(*dposp, p, left); /* Copy what was left */ 975 siz2 = siz-left; 976 p += left; 977 mp2 = mp->m_next; 978 /* Loop around copying up the siz2 bytes */ 979 while (siz2 > 0) { 980 if (mp2 == NULL) 981 return (EBADRPC); 982 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 983 if (xfer > 0) { 984 bcopy(mtod(mp2, caddr_t), p, xfer); 985 NFSMADV(mp2, xfer); 986 mp2->m_len -= xfer; 987 p += xfer; 988 siz2 -= xfer; 989 } 990 if (siz2 > 0) 991 mp2 = mp2->m_next; 992 } 993 mp->m_len = siz; 994 *mdp = mp2; 995 *dposp = mtod(mp2, caddr_t); 996 } 997 return (0); 998} 999 1000/* 1001 * Advance the position in the mbuf chain. 1002 */ 1003int 1004nfs_adv(mdp, dposp, offs, left) 1005 struct mbuf **mdp; 1006 caddr_t *dposp; 1007 int offs; 1008 int left; 1009{ 1010 register struct mbuf *m; 1011 register int s; 1012 1013 m = *mdp; 1014 s = left; 1015 while (s < offs) { 1016 offs -= s; 1017 m = m->m_next; 1018 if (m == NULL) 1019 return (EBADRPC); 1020 s = m->m_len; 1021 } 1022 *mdp = m; 1023 *dposp = mtod(m, caddr_t)+offs; 1024 return (0); 1025} 1026 1027/* 1028 * Copy a string into mbufs for the hard cases... 1029 */ 1030int 1031nfsm_strtmbuf(mb, bpos, cp, siz) 1032 struct mbuf **mb; 1033 char **bpos; 1034 char *cp; 1035 long siz; 1036{ 1037 register struct mbuf *m1 = 0, *m2; 1038 long left, xfer, len, tlen; 1039 u_long *tl; 1040 int putsize; 1041 1042 putsize = 1; 1043 m2 = *mb; 1044 left = M_TRAILINGSPACE(m2); 1045 if (left > 0) { 1046 tl = ((u_long *)(*bpos)); 1047 *tl++ = txdr_unsigned(siz); 1048 putsize = 0; 1049 left -= NFSX_UNSIGNED; 1050 m2->m_len += NFSX_UNSIGNED; 1051 if (left > 0) { 1052 bcopy(cp, (caddr_t) tl, left); 1053 siz -= left; 1054 cp += left; 1055 m2->m_len += left; 1056 left = 0; 1057 } 1058 } 1059 /* Loop around adding mbufs */ 1060 while (siz > 0) { 1061 MGET(m1, M_WAIT, MT_DATA); 1062 if (siz > MLEN) 1063 MCLGET(m1, M_WAIT); 1064 m1->m_len = NFSMSIZ(m1); 1065 m2->m_next = m1; 1066 m2 = m1; 1067 tl = mtod(m1, u_long *); 1068 tlen = 0; 1069 if (putsize) { 1070 *tl++ = txdr_unsigned(siz); 1071 m1->m_len -= NFSX_UNSIGNED; 1072 tlen = NFSX_UNSIGNED; 1073 putsize = 0; 1074 } 1075 if (siz < m1->m_len) { 1076 len = nfsm_rndup(siz); 1077 xfer = siz; 1078 if (xfer < len) 1079 *(tl+(xfer>>2)) = 0; 1080 } else { 1081 xfer = len = m1->m_len; 1082 } 1083 bcopy(cp, (caddr_t) tl, xfer); 1084 m1->m_len = len+tlen; 1085 siz -= xfer; 1086 cp += xfer; 1087 } 1088 *mb = m1; 1089 *bpos = mtod(m1, caddr_t)+m1->m_len; 1090 return (0); 1091} 1092 1093/* 1094 * Called once to initialize data structures... 1095 */ 1096int 1097nfs_init() 1098{ 1099 register int i; 1100 1101 /* 1102 * Check to see if major data structures haven't bloated. 1103 */ 1104 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1105 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1106 printf("Try reducing NFS_SMALLFH\n"); 1107 } 1108 if (sizeof (struct nfsmount) > NFS_MNTALLOC) { 1109 printf("struct nfsmount bloated (> %dbytes)\n", NFS_MNTALLOC); 1110 printf("Try reducing NFS_MUIDHASHSIZ\n"); 1111 } 1112 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1113 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1114 printf("Try reducing NFS_UIDHASHSIZ\n"); 1115 } 1116 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1117 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1118 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1119 } 1120 nfsrtt.pos = 0; 1121 rpc_vers = txdr_unsigned(RPC_VER2); 1122 rpc_call = txdr_unsigned(RPC_CALL); 1123 rpc_reply = txdr_unsigned(RPC_REPLY); 1124 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1125 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1126 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1127 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1128 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1129 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1130 nfs_prog = txdr_unsigned(NFS_PROG); 1131 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1132 nfs_true = txdr_unsigned(TRUE); 1133 nfs_false = txdr_unsigned(FALSE); 1134 nfs_xdrneg1 = txdr_unsigned(-1); 1135 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1136 if (nfs_ticks < 1) 1137 nfs_ticks = 1; 1138 /* Ensure async daemons disabled */ 1139 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1140 nfs_iodwant[i] = (struct proc *)0; 1141 TAILQ_INIT(&nfs_bufq); 1142 nfs_nhinit(); /* Init the nfsnode table */ 1143#ifndef NFS_NOSERVER 1144 nfsrv_init(0); /* Init server data structures */ 1145 nfsrv_initcache(); /* Init the server request cache */ 1146#endif 1147 1148 /* 1149 * Initialize the nqnfs server stuff. 1150 */ 1151 if (nqnfsstarttime == 0) { 1152 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1153 + nqsrv_clockskew + nqsrv_writeslack; 1154 NQLOADNOVRAM(nqnfsstarttime); 1155 CIRCLEQ_INIT(&nqtimerhead); 1156 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); 1157 } 1158 1159 /* 1160 * Initialize reply list and start timer 1161 */ 1162 TAILQ_INIT(&nfs_reqq); 1163 1164 nfs_timer(0); 1165 1166 1167#ifdef __FreeBSD__ 1168 /* 1169 * Set up lease_check and lease_updatetime so that other parts 1170 * of the system can call us, if we are loadable. 1171 */ 1172#ifndef NFS_NOSERVER 1173 lease_check = nfs_lease_check; 1174#endif 1175 lease_updatetime = nfs_lease_updatetime; 1176 vfsconf[MOUNT_NFS]->vfc_refcount++; /* make us non-unloadable */ 1177#ifdef VFS_LKM 1178 sysent[SYS_nfssvc].sy_narg = 2; 1179 sysent[SYS_nfssvc].sy_call = nfssvc; 1180#ifndef NFS_NOSERVER 1181 sysent[SYS_getfh].sy_narg = 2; 1182 sysent[SYS_getfh].sy_call = getfh; 1183#endif 1184#endif 1185#endif 1186 1187 return (0); 1188} 1189 1190/* 1191 * Attribute cache routines. 1192 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1193 * that are on the mbuf list 1194 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1195 * error otherwise 1196 */ 1197 1198/* 1199 * Load the attribute cache (that lives in the nfsnode entry) with 1200 * the values on the mbuf list and 1201 * Iff vap not NULL 1202 * copy the attributes to *vaper 1203 */ 1204int 1205nfs_loadattrcache(vpp, mdp, dposp, vaper) 1206 struct vnode **vpp; 1207 struct mbuf **mdp; 1208 caddr_t *dposp; 1209 struct vattr *vaper; 1210{ 1211 register struct vnode *vp = *vpp; 1212 register struct vattr *vap; 1213 register struct nfs_fattr *fp; 1214 register struct nfsnode *np; 1215 register struct nfsnodehashhead *nhpp; 1216 register long t1; 1217 caddr_t cp2; 1218 int error = 0, rdev; 1219 struct mbuf *md; 1220 enum vtype vtyp; 1221 u_short vmode; 1222 struct timespec mtime; 1223 struct vnode *nvp; 1224 int v3 = NFS_ISV3(vp); 1225 1226 md = *mdp; 1227 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1228 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) 1229 return (error); 1230 fp = (struct nfs_fattr *)cp2; 1231 if (v3) { 1232 vtyp = nfsv3tov_type(fp->fa_type); 1233 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1234 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), 1235 fxdr_unsigned(int, fp->fa3_rdev.specdata2)); 1236 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1237 } else { 1238 vtyp = nfsv2tov_type(fp->fa_type); 1239 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1240 /* 1241 * XXX 1242 * 1243 * The duplicate information returned in fa_type and fa_mode 1244 * is an ambiguity in the NFS version 2 protocol. 1245 * 1246 * VREG should be taken literally as a regular file. If a 1247 * server intents to return some type information differently 1248 * in the upper bits of the mode field (e.g. for sockets, or 1249 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we 1250 * leave the examination of the mode bits even in the VREG 1251 * case to avoid breakage for bogus servers, but we make sure 1252 * that there are actually type bits set in the upper part of 1253 * fa_mode (and failing that, trust the va_type field). 1254 * 1255 * NFSv3 cleared the issue, and requires fa_mode to not 1256 * contain any type information (while also introduing sockets 1257 * and FIFOs for fa_type). 1258 */ 1259 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) 1260 vtyp = IFTOVT(vmode); 1261 rdev = fxdr_unsigned(long, fp->fa2_rdev); 1262 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1263 1264 /* 1265 * Really ugly NFSv2 kludge. 1266 */ 1267 if (vtyp == VCHR && rdev == 0xffffffff) 1268 vtyp = VFIFO; 1269 } 1270 1271 /* 1272 * If v_type == VNON it is a new node, so fill in the v_type, 1273 * n_mtime fields. Check to see if it represents a special 1274 * device, and if so, check for a possible alias. Once the 1275 * correct vnode has been obtained, fill in the rest of the 1276 * information. 1277 */ 1278 np = VTONFS(vp); 1279 if (vp->v_type != vtyp) { 1280 /* 1281 * If we had a lock and it turns out that the vnode 1282 * is an object which we don't want to lock (e.g. VDIR) 1283 * to avoid nasty hanging problems on a server crash, 1284 * then release it here. 1285 */ 1286 if (vtyp != VREG && VOP_ISLOCKED(vp)) 1287 VOP_UNLOCK(vp); 1288 vp->v_type = vtyp; 1289 if (vp->v_type == VFIFO) { 1290 vp->v_op = fifo_nfsv2nodeop_p; 1291 } 1292 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1293 vp->v_op = spec_nfsv2nodeop_p; 1294 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1295 if (nvp) { 1296 /* 1297 * Discard unneeded vnode, but save its nfsnode. 1298 */ 1299 LIST_REMOVE(np, n_hash); 1300 nvp->v_data = vp->v_data; 1301 vp->v_data = NULL; 1302 vp->v_op = spec_vnodeop_p; 1303 vrele(vp); 1304 vgone(vp); 1305 /* 1306 * Reinitialize aliased node. 1307 */ 1308 np->n_vnode = nvp; 1309 nhpp = NFSNOHASH(nfs_hash(np->n_fhp, np->n_fhsize)); 1310 LIST_INSERT_HEAD(nhpp, np, n_hash); 1311 *vpp = vp = nvp; 1312 } 1313 } 1314 np->n_mtime = mtime.ts_sec; 1315 } 1316 vap = &np->n_vattr; 1317 vap->va_type = vtyp; 1318 vap->va_mode = (vmode & 07777); 1319 vap->va_rdev = (dev_t)rdev; 1320 vap->va_mtime = mtime; 1321 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1322 if (v3) { 1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1326 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1327 vap->va_blocksize = NFS_FABLKSIZE; 1328 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1329 vap->va_fileid = fxdr_unsigned(int, fp->fa3_fileid.nfsuquad[1]); 1330 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1331 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1332 vap->va_flags = 0; 1333 vap->va_filerev = 0; 1334 } else { 1335 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1336 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1337 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1338 vap->va_size = fxdr_unsigned(u_long, fp->fa2_size); 1339 vap->va_blocksize = fxdr_unsigned(long, fp->fa2_blocksize); 1340 vap->va_bytes = fxdr_unsigned(long, fp->fa2_blocks) * NFS_FABLKSIZE; 1341 vap->va_fileid = fxdr_unsigned(long, fp->fa2_fileid); 1342 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1343 vap->va_flags = 0; 1344 vap->va_ctime.ts_sec = fxdr_unsigned(long, fp->fa2_ctime.nfsv2_sec); 1345 vap->va_ctime.ts_nsec = 0; 1346 vap->va_gen = fxdr_unsigned(u_long, fp->fa2_ctime.nfsv2_usec); 1347 vap->va_filerev = 0; 1348 } 1349 if (vap->va_size != np->n_size) { 1350 if (vap->va_type == VREG) { 1351 if (np->n_flag & NMODIFIED) { 1352 if (vap->va_size < np->n_size) 1353 vap->va_size = np->n_size; 1354 else 1355 np->n_size = vap->va_size; 1356 } else 1357 np->n_size = vap->va_size; 1358 vnode_pager_setsize(vp, (u_long)np->n_size); 1359 } else 1360 np->n_size = vap->va_size; 1361 } 1362 np->n_attrstamp = time.tv_sec; 1363 if (vaper != NULL) { 1364 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1365 if (np->n_flag & NCHG) { 1366 if (np->n_flag & NACC) 1367 vaper->va_atime = np->n_atim; 1368 if (np->n_flag & NUPD) 1369 vaper->va_mtime = np->n_mtim; 1370 } 1371 } 1372 return (0); 1373} 1374 1375/* 1376 * Check the time stamp 1377 * If the cache is valid, copy contents to *vap and return 0 1378 * otherwise return an error 1379 */ 1380int 1381nfs_getattrcache(vp, vaper) 1382 register struct vnode *vp; 1383 struct vattr *vaper; 1384{ 1385 register struct nfsnode *np = VTONFS(vp); 1386 register struct vattr *vap; 1387 1388 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1389 nfsstats.attrcache_misses++; 1390 return (ENOENT); 1391 } 1392 nfsstats.attrcache_hits++; 1393 vap = &np->n_vattr; 1394 if (vap->va_size != np->n_size) { 1395 if (vap->va_type == VREG) { 1396 if (np->n_flag & NMODIFIED) { 1397 if (vap->va_size < np->n_size) 1398 vap->va_size = np->n_size; 1399 else 1400 np->n_size = vap->va_size; 1401 } else 1402 np->n_size = vap->va_size; 1403 vnode_pager_setsize(vp, (u_long)np->n_size); 1404 } else 1405 np->n_size = vap->va_size; 1406 } 1407 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1408 if (np->n_flag & NCHG) { 1409 if (np->n_flag & NACC) 1410 vaper->va_atime = np->n_atim; 1411 if (np->n_flag & NUPD) 1412 vaper->va_mtime = np->n_mtim; 1413 } 1414 return (0); 1415} 1416 1417#ifndef NFS_NOSERVER 1418/* 1419 * Set up nameidata for a lookup() call and do it 1420 */ 1421int 1422nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag) 1423 register struct nameidata *ndp; 1424 fhandle_t *fhp; 1425 int len; 1426 struct nfssvc_sock *slp; 1427 struct mbuf *nam; 1428 struct mbuf **mdp; 1429 caddr_t *dposp; 1430 struct vnode **retdirp; 1431 struct proc *p; 1432 int kerbflag; 1433{ 1434 register int i, rem; 1435 register struct mbuf *md; 1436 register char *fromcp, *tocp; 1437 struct vnode *dp; 1438 int error, rdonly; 1439 struct componentname *cnp = &ndp->ni_cnd; 1440 1441 *retdirp = (struct vnode *)0; 1442 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1443 /* 1444 * Copy the name from the mbuf list to ndp->ni_pnbuf 1445 * and set the various ndp fields appropriately. 1446 */ 1447 fromcp = *dposp; 1448 tocp = cnp->cn_pnbuf; 1449 md = *mdp; 1450 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1451 cnp->cn_hash = 0; 1452 for (i = 0; i < len; i++) { 1453 while (rem == 0) { 1454 md = md->m_next; 1455 if (md == NULL) { 1456 error = EBADRPC; 1457 goto out; 1458 } 1459 fromcp = mtod(md, caddr_t); 1460 rem = md->m_len; 1461 } 1462 if (*fromcp == '\0' || *fromcp == '/') { 1463 error = EACCES; 1464 goto out; 1465 } 1466 cnp->cn_hash += (unsigned char)*fromcp; 1467 *tocp++ = *fromcp++; 1468 rem--; 1469 } 1470 *tocp = '\0'; 1471 *mdp = md; 1472 *dposp = fromcp; 1473 len = nfsm_rndup(len)-len; 1474 if (len > 0) { 1475 if (rem >= len) 1476 *dposp += len; 1477 else if (error = nfs_adv(mdp, dposp, len, rem)) 1478 goto out; 1479 } 1480 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1481 cnp->cn_nameptr = cnp->cn_pnbuf; 1482 /* 1483 * Extract and set starting directory. 1484 */ 1485 if (error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1486 nam, &rdonly, kerbflag)) 1487 goto out; 1488 if (dp->v_type != VDIR) { 1489 nfsrv_vrele(dp); 1490 error = ENOTDIR; 1491 goto out; 1492 } 1493 VREF(dp); 1494 *retdirp = dp; 1495 ndp->ni_startdir = dp; 1496 if (rdonly) 1497 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1498 else 1499 cnp->cn_flags |= NOCROSSMOUNT; 1500 /* 1501 * And call lookup() to do the real work 1502 */ 1503 cnp->cn_proc = p; 1504 if (error = lookup(ndp)) 1505 goto out; 1506 /* 1507 * Check for encountering a symbolic link 1508 */ 1509 if (cnp->cn_flags & ISSYMLINK) { 1510 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1511 vput(ndp->ni_dvp); 1512 else 1513 vrele(ndp->ni_dvp); 1514 vput(ndp->ni_vp); 1515 ndp->ni_vp = NULL; 1516 error = EINVAL; 1517 goto out; 1518 } 1519 1520 nfsrv_vmio(ndp->ni_vp); 1521 1522 /* 1523 * Check for saved name request 1524 */ 1525 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1526 cnp->cn_flags |= HASBUF; 1527 return (0); 1528 } 1529out: 1530 FREE(cnp->cn_pnbuf, M_NAMEI); 1531 return (error); 1532} 1533 1534/* 1535 * A fiddled version of m_adj() that ensures null fill to a long 1536 * boundary and only trims off the back end 1537 */ 1538void 1539nfsm_adj(mp, len, nul) 1540 struct mbuf *mp; 1541 register int len; 1542 int nul; 1543{ 1544 register struct mbuf *m; 1545 register int count, i; 1546 register char *cp; 1547 1548 /* 1549 * Trim from tail. Scan the mbuf chain, 1550 * calculating its length and finding the last mbuf. 1551 * If the adjustment only affects this mbuf, then just 1552 * adjust and return. Otherwise, rescan and truncate 1553 * after the remaining size. 1554 */ 1555 count = 0; 1556 m = mp; 1557 for (;;) { 1558 count += m->m_len; 1559 if (m->m_next == (struct mbuf *)0) 1560 break; 1561 m = m->m_next; 1562 } 1563 if (m->m_len > len) { 1564 m->m_len -= len; 1565 if (nul > 0) { 1566 cp = mtod(m, caddr_t)+m->m_len-nul; 1567 for (i = 0; i < nul; i++) 1568 *cp++ = '\0'; 1569 } 1570 return; 1571 } 1572 count -= len; 1573 if (count < 0) 1574 count = 0; 1575 /* 1576 * Correct length for chain is "count". 1577 * Find the mbuf with last data, adjust its length, 1578 * and toss data from remaining mbufs on chain. 1579 */ 1580 for (m = mp; m; m = m->m_next) { 1581 if (m->m_len >= count) { 1582 m->m_len = count; 1583 if (nul > 0) { 1584 cp = mtod(m, caddr_t)+m->m_len-nul; 1585 for (i = 0; i < nul; i++) 1586 *cp++ = '\0'; 1587 } 1588 break; 1589 } 1590 count -= m->m_len; 1591 } 1592 for (m = m->m_next;m;m = m->m_next) 1593 m->m_len = 0; 1594} 1595 1596/* 1597 * Make these functions instead of macros, so that the kernel text size 1598 * doesn't get too big... 1599 */ 1600void 1601nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1602 struct nfsrv_descript *nfsd; 1603 int before_ret; 1604 register struct vattr *before_vap; 1605 int after_ret; 1606 struct vattr *after_vap; 1607 struct mbuf **mbp; 1608 char **bposp; 1609{ 1610 register struct mbuf *mb = *mbp, *mb2; 1611 register char *bpos = *bposp; 1612 register u_long *tl; 1613 1614 if (before_ret) { 1615 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1616 *tl = nfs_false; 1617 } else { 1618 nfsm_build(tl, u_long *, 7 * NFSX_UNSIGNED); 1619 *tl++ = nfs_true; 1620 txdr_hyper(&(before_vap->va_size), tl); 1621 tl += 2; 1622 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1623 tl += 2; 1624 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1625 } 1626 *bposp = bpos; 1627 *mbp = mb; 1628 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1629} 1630 1631void 1632nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1633 struct nfsrv_descript *nfsd; 1634 int after_ret; 1635 struct vattr *after_vap; 1636 struct mbuf **mbp; 1637 char **bposp; 1638{ 1639 register struct mbuf *mb = *mbp, *mb2; 1640 register char *bpos = *bposp; 1641 register u_long *tl; 1642 register struct nfs_fattr *fp; 1643 1644 if (after_ret) { 1645 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1646 *tl = nfs_false; 1647 } else { 1648 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FATTR); 1649 *tl++ = nfs_true; 1650 fp = (struct nfs_fattr *)tl; 1651 nfsm_srvfattr(nfsd, after_vap, fp); 1652 } 1653 *mbp = mb; 1654 *bposp = bpos; 1655} 1656 1657void 1658nfsm_srvfattr(nfsd, vap, fp) 1659 register struct nfsrv_descript *nfsd; 1660 register struct vattr *vap; 1661 register struct nfs_fattr *fp; 1662{ 1663 1664 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1665 fp->fa_uid = txdr_unsigned(vap->va_uid); 1666 fp->fa_gid = txdr_unsigned(vap->va_gid); 1667 if (nfsd->nd_flag & ND_NFSV3) { 1668 fp->fa_type = vtonfsv3_type(vap->va_type); 1669 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1670 txdr_hyper(&vap->va_size, &fp->fa3_size); 1671 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 1672 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1673 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1674 fp->fa3_fsid.nfsuquad[0] = 0; 1675 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1676 fp->fa3_fileid.nfsuquad[0] = 0; 1677 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1678 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1679 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1680 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1681 } else { 1682 fp->fa_type = vtonfsv2_type(vap->va_type); 1683 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1684 fp->fa2_size = txdr_unsigned(vap->va_size); 1685 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1686 if (vap->va_type == VFIFO) 1687 fp->fa2_rdev = 0xffffffff; 1688 else 1689 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1690 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1691 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1692 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1693 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1694 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1695 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1696 } 1697} 1698 1699/* 1700 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1701 * - look up fsid in mount list (if not found ret error) 1702 * - get vp and export rights by calling VFS_FHTOVP() 1703 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1704 * - if not lockflag unlock it with VOP_UNLOCK() 1705 */ 1706int 1707nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag) 1708 fhandle_t *fhp; 1709 int lockflag; 1710 struct vnode **vpp; 1711 struct ucred *cred; 1712 struct nfssvc_sock *slp; 1713 struct mbuf *nam; 1714 int *rdonlyp; 1715 int kerbflag; 1716{ 1717 register struct mount *mp; 1718 register int i; 1719 struct ucred *credanon; 1720 int error, exflags; 1721 1722 *vpp = (struct vnode *)0; 1723 mp = getvfs(&fhp->fh_fsid); 1724 if (!mp) 1725 return (ESTALE); 1726 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon); 1727 if (error) 1728 return (error); 1729 /* 1730 * Check/setup credentials. 1731 */ 1732 if (exflags & MNT_EXKERB) { 1733 if (!kerbflag) { 1734 vput(*vpp); 1735 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1736 } 1737 } else if (kerbflag) { 1738 vput(*vpp); 1739 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1740 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1741 cred->cr_uid = credanon->cr_uid; 1742 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1743 cred->cr_groups[i] = credanon->cr_groups[i]; 1744 cred->cr_ngroups = i; 1745 } 1746 if (exflags & MNT_EXRDONLY) 1747 *rdonlyp = 1; 1748 else 1749 *rdonlyp = 0; 1750 1751 nfsrv_vmio(*vpp); 1752 1753 if (!lockflag) 1754 VOP_UNLOCK(*vpp); 1755 return (0); 1756} 1757 1758#endif /* NFS_NOSERVER */ 1759/* 1760 * This function compares two net addresses by family and returns TRUE 1761 * if they are the same host. 1762 * If there is any doubt, return FALSE. 1763 * The AF_INET family is handled as a special case so that address mbufs 1764 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1765 */ 1766int 1767netaddr_match(family, haddr, nam) 1768 int family; 1769 union nethostaddr *haddr; 1770 struct mbuf *nam; 1771{ 1772 register struct sockaddr_in *inetaddr; 1773 1774 switch (family) { 1775 case AF_INET: 1776 inetaddr = mtod(nam, struct sockaddr_in *); 1777 if (inetaddr->sin_family == AF_INET && 1778 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1779 return (1); 1780 break; 1781#ifdef ISO 1782 case AF_ISO: 1783 { 1784 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1785 1786 isoaddr1 = mtod(nam, struct sockaddr_iso *); 1787 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 1788 if (isoaddr1->siso_family == AF_ISO && 1789 isoaddr1->siso_nlen > 0 && 1790 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1791 SAME_ISOADDR(isoaddr1, isoaddr2)) 1792 return (1); 1793 break; 1794 } 1795#endif /* ISO */ 1796 default: 1797 break; 1798 }; 1799 return (0); 1800} 1801 1802static nfsuint64 nfs_nullcookie = { 0, 0 }; 1803/* 1804 * This function finds the directory cookie that corresponds to the 1805 * logical byte offset given. 1806 */ 1807nfsuint64 * 1808nfs_getcookie(np, off, add) 1809 register struct nfsnode *np; 1810 off_t off; 1811 int add; 1812{ 1813 register struct nfsdmap *dp, *dp2; 1814 register int pos; 1815 1816 pos = off / NFS_DIRBLKSIZ; 1817 if (pos == 0) { 1818#ifdef DIAGNOSTIC 1819 if (add) 1820 panic("nfs getcookie add at 0"); 1821#endif 1822 return (&nfs_nullcookie); 1823 } 1824 pos--; 1825 dp = np->n_cookies.lh_first; 1826 if (!dp) { 1827 if (add) { 1828 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), 1829 M_NFSDIROFF, M_WAITOK); 1830 dp->ndm_eocookie = 0; 1831 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); 1832 } else 1833 return ((nfsuint64 *)0); 1834 } 1835 while (pos >= NFSNUMCOOKIES) { 1836 pos -= NFSNUMCOOKIES; 1837 if (dp->ndm_list.le_next) { 1838 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && 1839 pos >= dp->ndm_eocookie) 1840 return ((nfsuint64 *)0); 1841 dp = dp->ndm_list.le_next; 1842 } else if (add) { 1843 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), 1844 M_NFSDIROFF, M_WAITOK); 1845 dp2->ndm_eocookie = 0; 1846 LIST_INSERT_AFTER(dp, dp2, ndm_list); 1847 dp = dp2; 1848 } else 1849 return ((nfsuint64 *)0); 1850 } 1851 if (pos >= dp->ndm_eocookie) { 1852 if (add) 1853 dp->ndm_eocookie = pos + 1; 1854 else 1855 return ((nfsuint64 *)0); 1856 } 1857 return (&dp->ndm_cookies[pos]); 1858} 1859 1860/* 1861 * Invalidate cached directory information, except for the actual directory 1862 * blocks (which are invalidated separately). 1863 * Done mainly to avoid the use of stale offset cookies. 1864 */ 1865void 1866nfs_invaldir(vp) 1867 register struct vnode *vp; 1868{ 1869 register struct nfsnode *np = VTONFS(vp); 1870 1871#ifdef DIAGNOSTIC 1872 if (vp->v_type != VDIR) 1873 panic("nfs: invaldir not dir"); 1874#endif 1875 np->n_direofoffset = 0; 1876 np->n_cookieverf.nfsuquad[0] = 0; 1877 np->n_cookieverf.nfsuquad[1] = 0; 1878 if (np->n_cookies.lh_first) 1879 np->n_cookies.lh_first->ndm_eocookie = 0; 1880} 1881 1882/* 1883 * The write verifier has changed (probably due to a server reboot), so all 1884 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1885 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1886 * flag. Once done the new write verifier can be set for the mount point. 1887 */ 1888void 1889nfs_clearcommit(mp) 1890 struct mount *mp; 1891{ 1892 register struct vnode *vp, *nvp; 1893 register struct buf *bp, *nbp; 1894 int s; 1895 1896 s = splbio(); 1897loop: 1898 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 1899 if (vp->v_mount != mp) /* Paranoia */ 1900 goto loop; 1901 nvp = vp->v_mntvnodes.le_next; 1902 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 1903 nbp = bp->b_vnbufs.le_next; 1904 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1905 == (B_DELWRI | B_NEEDCOMMIT)) 1906 bp->b_flags &= ~B_NEEDCOMMIT; 1907 } 1908 } 1909 splx(s); 1910} 1911 1912#ifndef NFS_NOSERVER 1913/* 1914 * Map errnos to NFS error numbers. For Version 3 also filter out error 1915 * numbers not specified for the associated procedure. 1916 */ 1917int 1918nfsrv_errmap(nd, err) 1919 struct nfsrv_descript *nd; 1920 register int err; 1921{ 1922 register short *defaulterrp, *errp; 1923 1924 if (nd->nd_flag & ND_NFSV3) { 1925 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1926 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1927 while (*++errp) { 1928 if (*errp == err) 1929 return (err); 1930 else if (*errp > err) 1931 break; 1932 } 1933 return ((int)*defaulterrp); 1934 } else 1935 return (err & 0xffff); 1936 } 1937 if (err <= ELAST) 1938 return ((int)nfsrv_v2errmap[err - 1]); 1939 return (NFSERR_IO); 1940} 1941 1942int 1943nfsrv_vmio(struct vnode *vp) { 1944 vm_object_t object; 1945 1946 if ((vp == NULL) || (vp->v_type != VREG)) 1947 return 1; 1948 1949retry: 1950 if ((vp->v_flag & VVMIO) == 0) { 1951 struct vattr vat; 1952 struct proc *p = curproc; 1953 1954 if (VOP_GETATTR(vp, &vat, p->p_ucred, p) != 0) 1955 panic("nfsrv_vmio: VOP_GETATTR failed"); 1956 1957 (void) vnode_pager_alloc(vp, OFF_TO_IDX(round_page(vat.va_size)), 0, 0); 1958 1959 vp->v_flag |= VVMIO; 1960 } else { 1961 if ((object = vp->v_object) && 1962 (object->flags & OBJ_DEAD)) { 1963 tsleep(object, PVM, "nfdead", 0); 1964 goto retry; 1965 } 1966 if (!object) 1967 panic("nfsrv_vmio: VMIO object missing"); 1968 vm_object_reference(object); 1969 } 1970 return 0; 1971} 1972int 1973nfsrv_vput(struct vnode *vp) { 1974 if ((vp->v_flag & VVMIO) && vp->v_object) { 1975 vput(vp); 1976 vm_object_deallocate(vp->v_object); 1977 } else { 1978 vput(vp); 1979 } 1980 return 0; 1981} 1982int 1983nfsrv_vrele(struct vnode *vp) { 1984 if ((vp->v_flag & VVMIO) && vp->v_object) { 1985 vrele(vp); 1986 vm_object_deallocate(vp->v_object); 1987 } else { 1988 vrele(vp); 1989 } 1990 return 0; 1991} 1992#endif /* NFS_NOSERVER */ 1993