1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 * from: @(#)nfs_vnops.c 7.60 (Berkeley) 5/24/91 37 * $Id: nfs_vnops.c,v 1.9 1993/07/13 10:50:06 cgd Exp $ 38 */ 39 40 /* 41 * vnode op calls for sun nfs version 2 42 */ 43 44 #include "param.h" 45 #include "proc.h" 46 #include "kernel.h" 47 #include "systm.h" 48 #include "mount.h" 49 #include "buf.h" 50 #include "malloc.h" 51 #include "mbuf.h" 52 #include "conf.h" 53 #include "namei.h" 54 #include "vnode.h" 55 #include "specdev.h" 56 #include "fifo.h" 57 58 #include "../ufs/quota.h" 59 #include "../ufs/inode.h" 60 #include "../ufs/dir.h" 61 62 #include "nfsv2.h" 63 #include "nfs.h" 64 #include "nfsnode.h" 65 #include "nfsmount.h" 66 #include "xdr_subs.h" 67 #include "nfsm_subs.h" 68 #include "nfsiom.h" 69 70 /* Defs */ 71 #define TRUE 1 72 #define FALSE 0 73 74 /* 75 * Global vfs data structures for nfs 76 */ 77 struct vnodeops nfsv2_vnodeops = { 78 nfs_lookup, /* lookup */ 79 nfs_create, /* create */ 80 nfs_mknod, /* mknod */ 81 nfs_open, /* open */ 82 nfs_close, /* close */ 83 nfs_access, /* access */ 84 nfs_getattr, /* getattr */ 85 nfs_setattr, /* setattr */ 86 nfs_read, /* read */ 87 nfs_write, /* write */ 88 nfs_ioctl, /* ioctl */ 89 nfs_select, /* select */ 90 nfs_mmap, /* mmap */ 91 nfs_fsync, /* fsync */ 92 nfs_seek, /* seek */ 93 nfs_remove, /* remove */ 94 nfs_link, /* link */ 95 nfs_rename, /* rename */ 96 nfs_mkdir, /* mkdir */ 97 nfs_rmdir, /* rmdir */ 98 nfs_symlink, /* symlink */ 99 nfs_readdir, /* readdir */ 100 nfs_readlink, /* readlink */ 101 nfs_abortop, /* abortop */ 102 nfs_inactive, /* inactive */ 103 nfs_reclaim, /* reclaim */ 104 nfs_lock, /* lock */ 105 nfs_unlock, /* unlock */ 106 nfs_bmap, /* bmap */ 107 nfs_strategy, /* strategy */ 108 nfs_print, /* print */ 109 nfs_islocked, /* islocked */ 110 nfs_advlock, /* advlock */ 111 }; 112 113 /* 114 * Special device vnode ops 115 */ 116 struct vnodeops spec_nfsv2nodeops = { 117 spec_lookup, /* lookup */ 118 spec_create, /* create */ 119 spec_mknod, /* mknod */ 120 spec_open, /* open */ 121 spec_close, /* close */ 122 nfs_access, /* access */ 123 nfs_getattr, /* getattr */ 124 nfs_setattr, /* setattr */ 125 spec_read, /* read */ 126 spec_write, /* write */ 127 spec_ioctl, /* ioctl */ 128 spec_select, /* select */ 129 spec_mmap, /* mmap */ 130 spec_fsync, /* fsync */ 131 spec_seek, /* seek */ 132 spec_remove, /* remove */ 133 spec_link, /* link */ 134 spec_rename, /* rename */ 135 spec_mkdir, /* mkdir */ 136 spec_rmdir, /* rmdir */ 137 spec_symlink, /* symlink */ 138 spec_readdir, /* readdir */ 139 spec_readlink, /* readlink */ 140 spec_abortop, /* abortop */ 141 nfs_inactive, /* inactive */ 142 nfs_reclaim, /* reclaim */ 143 nfs_lock, /* lock */ 144 nfs_unlock, /* unlock */ 145 spec_bmap, /* bmap */ 146 spec_strategy, /* strategy */ 147 nfs_print, /* print */ 148 nfs_islocked, /* islocked */ 149 spec_advlock, /* advlock */ 150 }; 151 152 #ifdef FIFO 153 struct vnodeops fifo_nfsv2nodeops = { 154 fifo_lookup, /* lookup */ 155 fifo_create, /* create */ 156 fifo_mknod, /* mknod */ 157 fifo_open, /* open */ 158 fifo_close, /* close */ 159 nfs_access, /* access */ 160 nfs_getattr, /* getattr */ 161 nfs_setattr, /* setattr */ 162 fifo_read, /* read */ 163 fifo_write, /* write */ 164 fifo_ioctl, /* ioctl */ 165 fifo_select, /* select */ 166 fifo_mmap, /* mmap */ 167 fifo_fsync, /* fsync */ 168 fifo_seek, /* seek */ 169 fifo_remove, /* remove */ 170 fifo_link, /* link */ 171 fifo_rename, /* rename */ 172 fifo_mkdir, /* mkdir */ 173 fifo_rmdir, /* rmdir */ 174 fifo_symlink, /* symlink */ 175 fifo_readdir, /* readdir */ 176 fifo_readlink, /* readlink */ 177 fifo_abortop, /* abortop */ 178 nfs_inactive, /* inactive */ 179 nfs_reclaim, /* reclaim */ 180 nfs_lock, /* lock */ 181 nfs_unlock, /* unlock */ 182 fifo_bmap, /* bmap */ 183 fifo_badop, /* strategy */ 184 nfs_print, /* print */ 185 nfs_islocked, /* islocked */ 186 fifo_advlock, /* advlock */ 187 }; 188 #endif /* FIFO */ 189 190 /* 191 * Global vars 192 */ 193 extern u_long nfs_procids[NFS_NPROCS]; 194 extern u_long nfs_prog, nfs_vers; 195 extern char nfsiobuf[MAXPHYS+NBPG]; 196 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 197 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 198 enum vtype ntov_type[7] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON }; 199 int nfs_numasync = 0; 200 201 /* 202 * nfs null call from vfs. 203 */ 204 nfs_null(vp, cred, p) 205 struct vnode *vp; 206 struct ucred *cred; 207 struct proc *p; 208 { 209 caddr_t bpos, dpos; 210 u_long xid; 211 int error = 0; 212 struct mbuf *mreq, *mrep, *md, *mb; 213 214 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 215 nfsm_request(vp, NFSPROC_NULL, p, 0); 216 nfsm_reqdone; 217 return (error); 218 } 219 220 /* 221 * nfs access vnode op. 222 * Essentially just get vattr and then imitate iaccess() 223 */ 224 nfs_access(vp, mode, cred, p) 225 struct vnode *vp; 226 int mode; 227 register struct ucred *cred; 228 struct proc *p; 229 { 230 register struct vattr *vap; 231 register gid_t *gp; 232 struct vattr vattr; 233 register int i; 234 int error; 235 236 /* 237 * If you're the super-user, 238 * you always get access. 239 */ 240 if (cred->cr_uid == 0) 241 return (0); 242 vap = &vattr; 243 if (error = nfs_dogetattr(vp, vap, cred, 0, p)) 244 return (error); 245 /* 246 * Access check is based on only one of owner, group, public. 247 * If not owner, then check group. If not a member of the 248 * group, then check public access. 249 */ 250 if (cred->cr_uid != vap->va_uid) { 251 mode >>= 3; 252 gp = cred->cr_groups; 253 for (i = 0; i < cred->cr_ngroups; i++, gp++) 254 if (vap->va_gid == *gp) 255 goto found; 256 mode >>= 3; 257 found: 258 ; 259 } 260 if ((vap->va_mode & mode) == mode) 261 return (0); 262 return (EACCES); 263 } 264 265 /* 266 * nfs open vnode op 267 * Just check to see if the type is ok 268 */ 269 /* ARGSUSED */ 270 nfs_open(vp, mode, cred, p) 271 struct vnode *vp; 272 int mode; 273 struct ucred *cred; 274 struct proc *p; 275 { 276 register enum vtype vtyp; 277 278 vtyp = vp->v_type; 279 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 280 return (0); 281 else 282 return (EACCES); 283 } 284 285 /* 286 * nfs close vnode op 287 * For reg files, invalidate any buffer cache entries. 288 */ 289 /* ARGSUSED */ 290 nfs_close(vp, fflags, cred, p) 291 register struct vnode *vp; 292 int fflags; 293 struct ucred *cred; 294 struct proc *p; 295 { 296 register struct nfsnode *np = VTONFS(vp); 297 int error = 0; 298 299 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 300 nfs_lock(vp); 301 np->n_flag &= ~NMODIFIED; 302 vinvalbuf(vp, TRUE); 303 np->n_attrstamp = 0; 304 if (np->n_flag & NWRITEERR) { 305 np->n_flag &= ~NWRITEERR; 306 error = np->n_error; 307 } 308 nfs_unlock(vp); 309 } 310 return (error); 311 } 312 313 /* 314 * nfs getattr call from vfs. 315 */ 316 nfs_getattr(vp, vap, cred, p) 317 register struct vnode *vp; 318 struct vattr *vap; 319 struct ucred *cred; 320 struct proc *p; 321 { 322 return (nfs_dogetattr(vp, vap, cred, 0, p)); 323 } 324 325 nfs_dogetattr(vp, vap, cred, tryhard, p) 326 register struct vnode *vp; 327 struct vattr *vap; 328 struct ucred *cred; 329 int tryhard; 330 struct proc *p; 331 { 332 register caddr_t cp; 333 register long t1; 334 caddr_t bpos, dpos; 335 u_long xid; 336 int error = 0; 337 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 338 339 /* First look in the cache.. */ 340 /* cred == NOCRED when we are called by mountroot */ 341 if (cred != NOCRED && nfs_getattrcache(vp, vap) == 0) 342 return (0); 343 nfsstats.rpccnt[NFSPROC_GETATTR]++; 344 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 345 nfsm_fhtom(vp); 346 nfsm_request(vp, NFSPROC_GETATTR, p, tryhard); 347 nfsm_loadattr(vp, vap); 348 nfsm_reqdone; 349 return (error); 350 } 351 352 /* 353 * nfs setattr call. 354 */ 355 nfs_setattr(vp, vap, cred, p) 356 register struct vnode *vp; 357 register struct vattr *vap; 358 struct ucred *cred; 359 struct proc *p; 360 { 361 register struct nfsv2_sattr *sp; 362 register caddr_t cp; 363 register long t1; 364 caddr_t bpos, dpos; 365 u_long xid; 366 int error = 0; 367 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 368 struct nfsnode *np; 369 370 nfsstats.rpccnt[NFSPROC_SETATTR]++; 371 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 372 nfsm_fhtom(vp); 373 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 374 if (vap->va_mode == 0xffff) 375 sp->sa_mode = VNOVAL; 376 else 377 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 378 if (vap->va_uid == 0xffff) 379 sp->sa_uid = VNOVAL; 380 else 381 sp->sa_uid = txdr_unsigned(vap->va_uid); 382 if (vap->va_gid == 0xffff) 383 sp->sa_gid = VNOVAL; 384 else 385 sp->sa_gid = txdr_unsigned(vap->va_gid); 386 sp->sa_size = txdr_unsigned(vap->va_size); 387 /* jfw@ksr.com 6/2/93 */ 388 #if 0 /* bad assumption; Suns (at least) make full use of usec field */ 389 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 390 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 391 #else 392 txdr_time(&vap->va_atime, &sp->sa_atime); 393 #endif 394 txdr_time(&vap->va_mtime, &sp->sa_mtime); 395 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 396 vap->va_atime.tv_sec != VNOVAL) { 397 np = VTONFS(vp); 398 if (np->n_flag & NMODIFIED) { 399 np->n_flag &= ~NMODIFIED; 400 if (vap->va_size == 0) 401 vinvalbuf(vp, FALSE); 402 else 403 vinvalbuf(vp, TRUE); 404 np->n_attrstamp = 0; 405 } 406 } 407 nfsm_request(vp, NFSPROC_SETATTR, p, 1); 408 nfsm_loadattr(vp, (struct vattr *)0); 409 /* should we fill in any vap fields ?? */ 410 nfsm_reqdone; 411 return (error); 412 } 413 414 /* 415 * nfs lookup call, one step at a time... 416 * First look in cache 417 * If not found, unlock the directory nfsnode and do the rpc 418 */ 419 nfs_lookup(vp, ndp, p) 420 register struct vnode *vp; 421 register struct nameidata *ndp; 422 struct proc *p; 423 { 424 register struct vnode *vdp; 425 register u_long *tl; 426 register caddr_t cp; 427 register long t1, t2; 428 caddr_t bpos, dpos, cp2; 429 u_long xid; 430 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 431 struct vnode *newvp; 432 long len; 433 nfsv2fh_t *fhp; 434 struct nfsnode *np; 435 int lockparent, wantparent, flag, error = 0; 436 437 ndp->ni_dvp = vp; 438 ndp->ni_vp = NULL; 439 if (vp->v_type != VDIR) 440 return (ENOTDIR); 441 lockparent = ndp->ni_nameiop & LOCKPARENT; 442 flag = ndp->ni_nameiop & OPMASK; 443 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 444 if ((error = cache_lookup(ndp)) && error != ENOENT) { 445 struct vattr vattr; 446 int vpid; 447 448 vdp = ndp->ni_vp; 449 vpid = vdp->v_id; 450 /* 451 * See the comment starting `Step through' in ufs/ufs_lookup.c 452 * for an explanation of the locking protocol 453 */ 454 if (vp == vdp) { 455 VREF(vdp); 456 error = 0; 457 } else if (ndp->ni_isdotdot) { 458 nfs_unlock(vp); 459 error = vget(vdp); 460 if (!error && lockparent && *ndp->ni_next == '\0') 461 nfs_lock(vp); 462 } else { 463 error = vget(vdp); 464 if (!lockparent || error || *ndp->ni_next != '\0') 465 nfs_unlock(vp); 466 } 467 if (!error) { 468 if (vpid == vdp->v_id) { 469 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&& 470 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 471 nfsstats.lookupcache_hits++; 472 if (flag != LOOKUP && *ndp->ni_next == 0) 473 ndp->ni_nameiop |= SAVENAME; 474 return (0); 475 } 476 cache_purge(vdp); 477 } 478 nfs_nput(vdp); 479 if (lockparent && vdp != vp && *ndp->ni_next == '\0') 480 nfs_unlock(vp); 481 } 482 ndp->ni_vp = NULLVP; 483 } else 484 nfs_unlock(vp); 485 error = 0; 486 nfsstats.lookupcache_misses++; 487 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 488 len = ndp->ni_namelen; 489 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 490 nfsm_fhtom(vp); 491 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 492 nfsm_request(vp, NFSPROC_LOOKUP, p, 0); 493 nfsmout: 494 if (error) { 495 if (lockparent || (flag != CREATE && flag != RENAME) || 496 *ndp->ni_next != 0) 497 nfs_lock(vp); 498 if (flag != LOOKUP && *ndp->ni_next == 0) 499 ndp->ni_nameiop |= SAVENAME; 500 return (error); 501 } 502 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 503 504 /* 505 * Handle DELETE and RENAME cases... 506 */ 507 if (flag == DELETE && *ndp->ni_next == 0) { 508 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 509 VREF(vp); 510 newvp = vp; 511 np = VTONFS(vp); 512 } else { 513 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 514 nfs_lock(vp); 515 m_freem(mrep); 516 return (error); 517 } 518 newvp = NFSTOV(np); 519 } 520 if (error = 521 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 522 nfs_lock(vp); 523 if (newvp != vp) 524 nfs_nput(newvp); 525 else 526 vrele(vp); 527 m_freem(mrep); 528 return (error); 529 } 530 ndp->ni_vp = newvp; 531 if (lockparent || vp == newvp) 532 nfs_lock(vp); 533 m_freem(mrep); 534 ndp->ni_nameiop |= SAVENAME; 535 return (0); 536 } 537 538 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 539 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 540 nfs_lock(vp); 541 m_freem(mrep); 542 return (EISDIR); 543 } 544 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 545 nfs_lock(vp); 546 m_freem(mrep); 547 return (error); 548 } 549 newvp = NFSTOV(np); 550 if (error = 551 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 552 nfs_lock(vp); 553 nfs_nput(newvp); 554 m_freem(mrep); 555 return (error); 556 } 557 ndp->ni_vp = newvp; 558 if (lockparent) 559 nfs_lock(vp); 560 m_freem(mrep); 561 ndp->ni_nameiop |= SAVENAME; 562 return (0); 563 } 564 565 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 566 VREF(vp); 567 newvp = vp; 568 np = VTONFS(vp); 569 } else if (ndp->ni_isdotdot) { 570 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 571 nfs_lock(vp); 572 m_freem(mrep); 573 return (error); 574 } 575 newvp = NFSTOV(np); 576 } else { 577 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 578 nfs_lock(vp); 579 m_freem(mrep); 580 return (error); 581 } 582 newvp = NFSTOV(np); 583 } 584 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 585 nfs_lock(vp); 586 if (newvp != vp) 587 nfs_nput(newvp); 588 else 589 vrele(vp); 590 m_freem(mrep); 591 return (error); 592 } 593 m_freem(mrep); 594 595 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 596 nfs_lock(vp); 597 ndp->ni_vp = newvp; 598 if (flag != LOOKUP && *ndp->ni_next == 0) 599 ndp->ni_nameiop |= SAVENAME; 600 if (error == 0 && ndp->ni_makeentry) { 601 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 602 cache_enter(ndp); 603 } 604 return (error); 605 } 606 607 /* 608 * nfs read call. 609 * Just call nfs_bioread() to do the work. 610 */ 611 nfs_read(vp, uiop, ioflag, cred) 612 register struct vnode *vp; 613 struct uio *uiop; 614 int ioflag; 615 struct ucred *cred; 616 { 617 if (vp->v_type != VREG) 618 return (EPERM); 619 return (nfs_bioread(vp, uiop, ioflag, cred)); 620 } 621 622 /* 623 * nfs readlink call 624 */ 625 nfs_readlink(vp, uiop, cred) 626 struct vnode *vp; 627 struct uio *uiop; 628 struct ucred *cred; 629 { 630 if (vp->v_type != VLNK) 631 return (EPERM); 632 return (nfs_bioread(vp, uiop, 0, cred)); 633 } 634 635 /* 636 * Do a readlink rpc. 637 * Called by nfs_doio() from below the buffer cache. 638 */ 639 nfs_readlinkrpc(vp, uiop, cred) 640 register struct vnode *vp; 641 struct uio *uiop; 642 struct ucred *cred; 643 { 644 register u_long *tl; 645 register caddr_t cp; 646 register long t1; 647 caddr_t bpos, dpos, cp2; 648 u_long xid; 649 int error = 0; 650 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 651 long len; 652 653 nfsstats.rpccnt[NFSPROC_READLINK]++; 654 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 655 nfsm_fhtom(vp); 656 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0); 657 nfsm_strsiz(len, NFS_MAXPATHLEN); 658 nfsm_mtouio(uiop, len); 659 nfsm_reqdone; 660 return (error); 661 } 662 663 /* 664 * nfs read rpc call 665 * Ditto above 666 */ 667 nfs_readrpc(vp, uiop, cred) 668 register struct vnode *vp; 669 struct uio *uiop; 670 struct ucred *cred; 671 { 672 register u_long *tl; 673 register caddr_t cp; 674 register long t1; 675 caddr_t bpos, dpos, cp2; 676 u_long xid; 677 int error = 0; 678 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 679 struct nfsmount *nmp; 680 long len, retlen, tsiz; 681 682 nmp = VFSTONFS(vp->v_mount); 683 tsiz = uiop->uio_resid; 684 while (tsiz > 0) { 685 nfsstats.rpccnt[NFSPROC_READ]++; 686 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 687 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 688 nfsm_fhtom(vp); 689 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 690 *tl++ = txdr_unsigned(uiop->uio_offset); 691 *tl++ = txdr_unsigned(len); 692 *tl = 0; 693 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1); 694 nfsm_loadattr(vp, (struct vattr *)0); 695 nfsm_strsiz(retlen, nmp->nm_rsize); 696 nfsm_mtouio(uiop, retlen); 697 m_freem(mrep); 698 if (retlen < len) 699 tsiz = 0; 700 else 701 tsiz -= len; 702 } 703 nfsmout: 704 return (error); 705 } 706 707 /* 708 * nfs write call 709 */ 710 nfs_writerpc(vp, uiop, cred) 711 register struct vnode *vp; 712 struct uio *uiop; 713 struct ucred *cred; 714 { 715 register u_long *tl; 716 register caddr_t cp; 717 register long t1; 718 caddr_t bpos, dpos; 719 u_long xid; 720 int error = 0; 721 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 722 struct nfsmount *nmp; 723 long len, tsiz; 724 725 nmp = VFSTONFS(vp->v_mount); 726 tsiz = uiop->uio_resid; 727 while (tsiz > 0) { 728 nfsstats.rpccnt[NFSPROC_WRITE]++; 729 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 730 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 731 NFSX_FH+NFSX_UNSIGNED*4); 732 nfsm_fhtom(vp); 733 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 734 *(tl+1) = txdr_unsigned(uiop->uio_offset); 735 *(tl+3) = txdr_unsigned(len); 736 nfsm_uiotom(uiop, len); 737 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1); 738 nfsm_loadattr(vp, (struct vattr *)0); 739 m_freem(mrep); 740 tsiz -= len; 741 } 742 nfsmout: 743 return (error); 744 } 745 746 /* 747 * nfs mknod call 748 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 749 * set to specify the file type and the size field for rdev. 750 */ 751 /* ARGSUSED */ 752 nfs_mknod(ndp, vap, cred, p) 753 struct nameidata *ndp; 754 struct ucred *cred; 755 register struct vattr *vap; 756 struct proc *p; 757 { 758 register struct nfsv2_sattr *sp; 759 register u_long *tl; 760 register caddr_t cp; 761 register long t1, t2; 762 caddr_t bpos, dpos; 763 u_long xid; 764 int error = 0; 765 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 766 u_long rdev; 767 768 if (vap->va_type == VCHR || vap->va_type == VBLK) 769 rdev = txdr_unsigned(vap->va_rdev); 770 #ifdef FIFO 771 else if (vap->va_type == VFIFO) 772 rdev = 0xffffffff; 773 #endif /* FIFO */ 774 else { 775 VOP_ABORTOP(ndp); 776 vput(ndp->ni_dvp); 777 return (EOPNOTSUPP); 778 } 779 nfsstats.rpccnt[NFSPROC_CREATE]++; 780 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 781 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 782 nfsm_fhtom(ndp->ni_dvp); 783 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 784 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 785 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 786 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 787 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 788 sp->sa_size = rdev; 789 /* or should these be VNOVAL ?? */ 790 txdr_time(&vap->va_atime, &sp->sa_atime); 791 txdr_time(&vap->va_mtime, &sp->sa_mtime); 792 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 793 nfsm_reqdone; 794 FREE(ndp->ni_pnbuf, M_NAMEI); 795 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 796 nfs_nput(ndp->ni_dvp); 797 return (error); 798 } 799 800 /* 801 * nfs file create call 802 */ 803 nfs_create(ndp, vap, p) 804 register struct nameidata *ndp; 805 register struct vattr *vap; 806 struct proc *p; 807 { 808 register struct nfsv2_sattr *sp; 809 register u_long *tl; 810 register caddr_t cp; 811 register long t1, t2; 812 caddr_t bpos, dpos, cp2; 813 u_long xid; 814 int error = 0; 815 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 816 817 nfsstats.rpccnt[NFSPROC_CREATE]++; 818 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 819 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 820 nfsm_fhtom(ndp->ni_dvp); 821 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 822 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 823 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 824 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 825 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 826 sp->sa_size = txdr_unsigned(0); 827 /* or should these be VNOVAL ?? */ 828 txdr_time(&vap->va_atime, &sp->sa_atime); 829 txdr_time(&vap->va_mtime, &sp->sa_mtime); 830 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 831 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 832 nfsm_reqdone; 833 FREE(ndp->ni_pnbuf, M_NAMEI); 834 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 835 nfs_nput(ndp->ni_dvp); 836 return (error); 837 } 838 839 /* 840 * nfs file remove call 841 * To try and make nfs semantics closer to ufs semantics, a file that has 842 * other processes using the vnode is renamed instead of removed and then 843 * removed later on the last close. 844 * - If v_usecount > 1 845 * If a rename is not already in the works 846 * call nfs_sillyrename() to set it up 847 * else 848 * do the remove rpc 849 */ 850 nfs_remove(ndp, p) 851 register struct nameidata *ndp; 852 struct proc *p; 853 { 854 register struct vnode *vp = ndp->ni_vp; 855 register struct nfsnode *np = VTONFS(ndp->ni_vp); 856 register u_long *tl; 857 register caddr_t cp; 858 register long t1, t2; 859 caddr_t bpos, dpos; 860 u_long xid; 861 int error = 0; 862 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 863 864 if (vp->v_usecount > 1) { 865 if (!np->n_sillyrename) 866 error = nfs_sillyrename(ndp, p); 867 } else { 868 nfsstats.rpccnt[NFSPROC_REMOVE]++; 869 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 870 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 871 nfsm_fhtom(ndp->ni_dvp); 872 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 873 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1); 874 nfsm_reqdone; 875 FREE(ndp->ni_pnbuf, M_NAMEI); 876 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 877 /* 878 * Kludge City: If the first reply to the remove rpc is lost.. 879 * the reply to the retransmitted request will be ENOENT 880 * since the file was in fact removed 881 * Therefore, we cheat and return success. 882 */ 883 if (error == ENOENT) 884 error = 0; 885 } 886 np->n_attrstamp = 0; 887 if (ndp->ni_dvp == vp) 888 vrele(vp); 889 else 890 nfs_nput(ndp->ni_dvp); 891 nfs_nput(vp); 892 return (error); 893 } 894 895 /* 896 * nfs file remove rpc called from nfs_inactive 897 */ 898 nfs_removeit(sp, p) 899 register struct sillyrename *sp; 900 struct proc *p; 901 { 902 register u_long *tl; 903 register caddr_t cp; 904 register long t1, t2; 905 caddr_t bpos, dpos; 906 u_long xid; 907 int error = 0; 908 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 909 910 nfsstats.rpccnt[NFSPROC_REMOVE]++; 911 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred, 912 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 913 nfsm_fhtom(sp->s_dvp); 914 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 915 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1); 916 nfsm_reqdone; 917 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 918 return (error); 919 } 920 921 /* 922 * nfs file rename call 923 */ 924 nfs_rename(sndp, tndp, p) 925 register struct nameidata *sndp, *tndp; 926 struct proc *p; 927 { 928 register u_long *tl; 929 register caddr_t cp; 930 register long t1, t2; 931 caddr_t bpos, dpos; 932 u_long xid; 933 int error = 0; 934 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 935 936 nfsstats.rpccnt[NFSPROC_RENAME]++; 937 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 938 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 939 nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/ 940 nfsm_fhtom(sndp->ni_dvp); 941 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 942 nfsm_fhtom(tndp->ni_dvp); 943 nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN); 944 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 945 nfsm_reqdone; 946 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 947 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 948 if (sndp->ni_vp->v_type == VDIR) { 949 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 950 cache_purge(tndp->ni_dvp); 951 cache_purge(sndp->ni_dvp); 952 } 953 if (tndp->ni_dvp == tndp->ni_vp) 954 vrele(tndp->ni_dvp); 955 else 956 vput(tndp->ni_dvp); 957 if (tndp->ni_vp) 958 vput(tndp->ni_vp); 959 vrele(sndp->ni_dvp); 960 vrele(sndp->ni_vp); 961 /* 962 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 963 */ 964 if (error == ENOENT) 965 error = 0; 966 return (error); 967 } 968 969 /* 970 * nfs file rename rpc called from nfs_remove() above 971 */ 972 nfs_renameit(sndp, sp, p) 973 register struct nameidata *sndp; 974 register struct sillyrename *sp; 975 struct proc *p; 976 { 977 register u_long *tl; 978 register caddr_t cp; 979 register long t1, t2; 980 caddr_t bpos, dpos; 981 u_long xid; 982 int error = 0; 983 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 984 985 nfsstats.rpccnt[NFSPROC_RENAME]++; 986 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred, 987 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 988 nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/ 989 nfsm_fhtom(sndp->ni_dvp); 990 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 991 nfsm_fhtom(sp->s_dvp); 992 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 993 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 994 nfsm_reqdone; 995 FREE(sndp->ni_pnbuf, M_NAMEI); 996 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 997 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 998 return (error); 999 } 1000 1001 /* 1002 * nfs hard link create call 1003 */ 1004 nfs_link(vp, ndp, p) 1005 register struct vnode *vp; 1006 register struct nameidata *ndp; 1007 struct proc *p; 1008 { 1009 register u_long *tl; 1010 register caddr_t cp; 1011 register long t1, t2; 1012 caddr_t bpos, dpos; 1013 u_long xid; 1014 int error = 0; 1015 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1016 1017 if (ndp->ni_dvp != vp) 1018 nfs_lock(vp); 1019 nfsstats.rpccnt[NFSPROC_LINK]++; 1020 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1021 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 1022 nfsm_fhtom(vp); 1023 nfsm_fhtom(ndp->ni_dvp); 1024 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1025 nfsm_request(vp, NFSPROC_LINK, p, 1); 1026 nfsm_reqdone; 1027 FREE(ndp->ni_pnbuf, M_NAMEI); 1028 VTONFS(vp)->n_attrstamp = 0; 1029 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1030 if (ndp->ni_dvp != vp) 1031 nfs_unlock(vp); 1032 nfs_nput(ndp->ni_dvp); 1033 /* 1034 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1035 */ 1036 if (error == EEXIST) 1037 error = 0; 1038 return (error); 1039 } 1040 1041 /* 1042 * nfs symbolic link create call 1043 */ 1044 nfs_symlink(ndp, vap, nm, p) 1045 struct nameidata *ndp; 1046 struct vattr *vap; 1047 char *nm; /* is this the path ?? */ 1048 struct proc *p; 1049 { 1050 register struct nfsv2_sattr *sp; 1051 register u_long *tl; 1052 register caddr_t cp; 1053 register long t1, t2; 1054 caddr_t bpos, dpos; 1055 u_long xid; 1056 int error = 0; 1057 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1058 1059 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1060 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1061 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED); 1062 nfsm_fhtom(ndp->ni_dvp); 1063 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1064 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1065 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1066 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1067 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1068 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1069 sp->sa_size = txdr_unsigned(VNOVAL); 1070 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1071 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1072 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1); 1073 nfsm_reqdone; 1074 FREE(ndp->ni_pnbuf, M_NAMEI); 1075 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1076 nfs_nput(ndp->ni_dvp); 1077 /* 1078 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1079 */ 1080 if (error == EEXIST) 1081 error = 0; 1082 return (error); 1083 } 1084 1085 /* 1086 * nfs make dir call 1087 */ 1088 nfs_mkdir(ndp, vap, p) 1089 register struct nameidata *ndp; 1090 struct vattr *vap; 1091 struct proc *p; 1092 { 1093 register struct nfsv2_sattr *sp; 1094 register u_long *tl; 1095 register caddr_t cp; 1096 register long t1, t2; 1097 register int len; 1098 caddr_t bpos, dpos, cp2; 1099 u_long xid; 1100 int error = 0, firsttry = 1; 1101 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1102 1103 len = ndp->ni_namelen; 1104 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1105 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1106 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1107 nfsm_fhtom(ndp->ni_dvp); 1108 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1109 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1110 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1111 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1112 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1113 sp->sa_size = txdr_unsigned(VNOVAL); 1114 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1115 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1116 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1); 1117 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1118 nfsm_reqdone; 1119 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1120 /* 1121 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1122 * if we can succeed in looking up the directory. 1123 * "firsttry" is necessary since the macros may "goto nfsmout" which 1124 * is above the if on errors. (Ugh) 1125 */ 1126 if (error == EEXIST && firsttry) { 1127 firsttry = 0; 1128 error = 0; 1129 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1130 ndp->ni_vp = NULL; 1131 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1132 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1133 nfsm_fhtom(ndp->ni_dvp); 1134 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1135 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1); 1136 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1137 if (ndp->ni_vp->v_type != VDIR) { 1138 vput(ndp->ni_vp); 1139 error = EEXIST; 1140 } 1141 m_freem(mrep); 1142 } 1143 FREE(ndp->ni_pnbuf, M_NAMEI); 1144 nfs_nput(ndp->ni_dvp); 1145 return (error); 1146 } 1147 1148 /* 1149 * nfs remove directory call 1150 */ 1151 nfs_rmdir(ndp, p) 1152 register struct nameidata *ndp; 1153 struct proc *p; 1154 { 1155 register u_long *tl; 1156 register caddr_t cp; 1157 register long t1, t2; 1158 caddr_t bpos, dpos; 1159 u_long xid; 1160 int error = 0; 1161 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1162 1163 if (ndp->ni_dvp == ndp->ni_vp) { 1164 vrele(ndp->ni_dvp); 1165 nfs_nput(ndp->ni_dvp); 1166 return (EINVAL); 1167 } 1168 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1169 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1170 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 1171 nfsm_fhtom(ndp->ni_dvp); 1172 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1173 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1); 1174 nfsm_reqdone; 1175 FREE(ndp->ni_pnbuf, M_NAMEI); 1176 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1177 cache_purge(ndp->ni_dvp); 1178 cache_purge(ndp->ni_vp); 1179 nfs_nput(ndp->ni_vp); 1180 nfs_nput(ndp->ni_dvp); 1181 /* 1182 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1183 */ 1184 if (error == ENOENT) 1185 error = 0; 1186 return (error); 1187 } 1188 1189 /* 1190 * nfs readdir call 1191 * Although cookie is defined as opaque, I translate it to/from net byte 1192 * order so that it looks more sensible. This appears consistent with the 1193 * Ultrix implementation of NFS. 1194 */ 1195 nfs_readdir(vp, uiop, cred, eofflagp) 1196 register struct vnode *vp; 1197 struct uio *uiop; 1198 struct ucred *cred; 1199 int *eofflagp; 1200 { 1201 register struct nfsnode *np = VTONFS(vp); 1202 int tresid, error; 1203 struct vattr vattr; 1204 1205 if (vp->v_type != VDIR) 1206 return (EPERM); 1207 /* 1208 * First, check for hit on the EOF offset cache 1209 */ 1210 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1211 (np->n_flag & NMODIFIED) == 0 && 1212 nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 && 1213 np->n_mtime == vattr.va_mtime.tv_sec) { 1214 *eofflagp = 1; 1215 nfsstats.direofcache_hits++; 1216 return (0); 1217 } 1218 1219 /* 1220 * Call nfs_bioread() to do the real work. 1221 */ 1222 tresid = uiop->uio_resid; 1223 error = nfs_bioread(vp, uiop, 0, cred); 1224 1225 if (!error && uiop->uio_resid == tresid) { 1226 *eofflagp = 1; 1227 nfsstats.direofcache_misses++; 1228 } else 1229 *eofflagp = 0; 1230 return (error); 1231 } 1232 1233 /* 1234 * Readdir rpc call. 1235 * Called from below the buffer cache by nfs_doio(). 1236 */ 1237 nfs_readdirrpc(vp, uiop, cred) 1238 register struct vnode *vp; 1239 struct uio *uiop; 1240 struct ucred *cred; 1241 { 1242 register long len; 1243 register struct direct *dp; 1244 register u_long *tl; 1245 register caddr_t cp; 1246 register long t1; 1247 long tlen, lastlen; 1248 caddr_t bpos, dpos, cp2; 1249 u_long xid; 1250 int error = 0; 1251 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1252 struct mbuf *md2; 1253 caddr_t dpos2; 1254 int siz; 1255 int more_dirs = 1; 1256 off_t off, savoff; 1257 struct direct *savdp; 1258 struct nfsmount *nmp; 1259 struct nfsnode *np = VTONFS(vp); 1260 long tresid; 1261 1262 nmp = VFSTONFS(vp->v_mount); 1263 tresid = uiop->uio_resid; 1264 /* 1265 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1266 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1267 * The stopping criteria is EOF or buffer full. 1268 */ 1269 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1270 nfsstats.rpccnt[NFSPROC_READDIR]++; 1271 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1272 nfsm_fhtom(vp); 1273 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1274 *tl++ = txdr_unsigned(uiop->uio_offset); 1275 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1276 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1277 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0); 1278 siz = 0; 1279 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 1280 more_dirs = fxdr_unsigned(int, *tl); 1281 1282 /* Save the position so that we can do nfsm_mtouio() later */ 1283 dpos2 = dpos; 1284 md2 = md; 1285 1286 /* loop thru the dir entries, doctoring them to 4bsd form */ 1287 off = uiop->uio_offset; 1288 #ifdef lint 1289 dp = (struct direct *)0; 1290 #endif /* lint */ 1291 while (more_dirs && siz < uiop->uio_resid) { 1292 savoff = off; /* Hold onto offset and dp */ 1293 savdp = dp; 1294 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1295 dp = (struct direct *)tl; 1296 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1297 len = fxdr_unsigned(int, *tl); 1298 if (len <= 0 || len > NFS_MAXNAMLEN) { 1299 error = EBADRPC; 1300 m_freem(mrep); 1301 goto nfsmout; 1302 } 1303 dp->d_namlen = (u_short)len; 1304 nfsm_adv(len); /* Point past name */ 1305 tlen = nfsm_rndup(len); 1306 /* 1307 * This should not be necessary, but some servers have 1308 * broken XDR such that these bytes are not null filled. 1309 */ 1310 if (tlen != len) { 1311 *dpos = '\0'; /* Null-terminate */ 1312 nfsm_adv(tlen - len); 1313 len = tlen; 1314 } 1315 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1316 off = fxdr_unsigned(off_t, *tl); 1317 *tl++ = 0; /* Ensures null termination of name */ 1318 more_dirs = fxdr_unsigned(int, *tl); 1319 dp->d_reclen = len+4*NFSX_UNSIGNED; 1320 siz += dp->d_reclen; 1321 } 1322 /* 1323 * If at end of rpc data, get the eof boolean 1324 */ 1325 if (!more_dirs) { 1326 nfsm_disecton(tl, u_long *, NFSX_UNSIGNED); 1327 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1328 1329 /* 1330 * If at EOF, cache directory offset 1331 */ 1332 if (!more_dirs) 1333 np->n_direofoffset = off; 1334 } 1335 /* 1336 * If there is too much to fit in the data buffer, use savoff and 1337 * savdp to trim off the last record. 1338 * --> we are not at eof 1339 */ 1340 if (siz > uiop->uio_resid) { 1341 off = savoff; 1342 siz -= dp->d_reclen; 1343 dp = savdp; 1344 more_dirs = 0; /* Paranoia */ 1345 } 1346 if (siz > 0) { 1347 lastlen = dp->d_reclen; 1348 md = md2; 1349 dpos = dpos2; 1350 nfsm_mtouio(uiop, siz); 1351 uiop->uio_offset = off; 1352 } else 1353 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1354 m_freem(mrep); 1355 } 1356 /* 1357 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1358 * by increasing d_reclen for the last record. 1359 */ 1360 if (uiop->uio_resid < tresid) { 1361 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1362 if (len > 0) { 1363 dp = (struct direct *) 1364 (uiop->uio_iov->iov_base - lastlen); 1365 dp->d_reclen += len; 1366 uiop->uio_iov->iov_base += len; 1367 uiop->uio_iov->iov_len -= len; 1368 uiop->uio_resid -= len; 1369 } 1370 } 1371 nfsmout: 1372 return (error); 1373 } 1374 1375 static char hextoasc[] = "0123456789abcdef"; 1376 1377 /* 1378 * Silly rename. To make the NFS filesystem that is stateless look a little 1379 * more like the "ufs" a remove of an active vnode is translated to a rename 1380 * to a funny looking filename that is removed by nfs_inactive on the 1381 * nfsnode. There is the potential for another process on a different client 1382 * to create the same funny name between the nfs_lookitup() fails and the 1383 * nfs_rename() completes, but... 1384 */ 1385 nfs_sillyrename(ndp, p) 1386 register struct nameidata *ndp; 1387 struct proc *p; 1388 { 1389 register struct nfsnode *np; 1390 register struct sillyrename *sp; 1391 int error; 1392 short pid; 1393 1394 np = VTONFS(ndp->ni_dvp); 1395 cache_purge(ndp->ni_dvp); 1396 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1397 M_NFSREQ, M_WAITOK); 1398 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1399 np = VTONFS(ndp->ni_vp); 1400 sp->s_cred = crdup(ndp->ni_cred); 1401 sp->s_dvp = ndp->ni_dvp; 1402 VREF(sp->s_dvp); 1403 1404 /* Fudge together a funny name */ 1405 pid = p->p_pid; 1406 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1407 sp->s_namlen = 12; 1408 sp->s_name[8] = hextoasc[pid & 0xf]; 1409 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1410 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1411 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1412 1413 /* Try lookitups until we get one that isn't there */ 1414 while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) { 1415 sp->s_name[4]++; 1416 if (sp->s_name[4] > 'z') { 1417 error = EINVAL; 1418 goto bad; 1419 } 1420 } 1421 if (error = nfs_renameit(ndp, sp, p)) 1422 goto bad; 1423 nfs_lookitup(sp, &np->n_fh, p); 1424 np->n_sillyrename = sp; 1425 return (0); 1426 bad: 1427 vrele(sp->s_dvp); 1428 crfree(sp->s_cred); 1429 free((caddr_t)sp, M_NFSREQ); 1430 return (error); 1431 } 1432 1433 /* 1434 * Look up a file name for silly rename stuff. 1435 * Just like nfs_lookup() except that it doesn't load returned values 1436 * into the nfsnode table. 1437 * If fhp != NULL it copies the returned file handle out 1438 */ 1439 nfs_lookitup(sp, fhp, p) 1440 register struct sillyrename *sp; 1441 nfsv2fh_t *fhp; 1442 struct proc *p; 1443 { 1444 register struct vnode *vp = sp->s_dvp; 1445 register u_long *tl; 1446 register caddr_t cp; 1447 register long t1, t2; 1448 caddr_t bpos, dpos, cp2; 1449 u_long xid; 1450 int error = 0; 1451 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1452 long len; 1453 1454 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1455 len = sp->s_namlen; 1456 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1457 nfsm_fhtom(vp); 1458 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1459 nfsm_request(vp, NFSPROC_LOOKUP, p, 1); 1460 if (fhp != NULL) { 1461 nfsm_disect(cp, caddr_t, NFSX_FH); 1462 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1463 } 1464 nfsm_reqdone; 1465 return (error); 1466 } 1467 1468 /* 1469 * Kludge City.. 1470 * - make nfs_bmap() essentially a no-op that does no translation 1471 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1472 * after mapping the physical addresses into Kernel Virtual space in the 1473 * nfsiobuf area. 1474 * (Maybe I could use the process's page mapping, but I was concerned that 1475 * Kernel Write might not be enabled and also figured copyout() would do 1476 * a lot more work than bcopy() and also it currently happens in the 1477 * context of the swapper process (2). 1478 */ 1479 nfs_bmap(vp, bn, vpp, bnp) 1480 struct vnode *vp; 1481 daddr_t bn; 1482 struct vnode **vpp; 1483 daddr_t *bnp; 1484 { 1485 if (vpp != NULL) 1486 *vpp = vp; 1487 if (bnp != NULL) 1488 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1489 return (0); 1490 } 1491 1492 /* 1493 * Strategy routine for phys. i/o 1494 * If the biod's are running, queue a request 1495 * otherwise just call nfs_doio() to get it done 1496 */ 1497 nfs_strategy(bp) 1498 register struct buf *bp; 1499 { 1500 register struct buf *dp; 1501 register int i; 1502 int error = 0; 1503 int fnd = 0; 1504 1505 /* 1506 * Set b_proc. It seems a bit silly to do it here, but since bread() 1507 * doesn't set it, I will. 1508 * Set b_proc == NULL for asynchronous ops, since these may still 1509 * be hanging about after the process terminates. 1510 */ 1511 if ((bp->b_flags & B_PHYS) == 0) { 1512 if (bp->b_flags & B_ASYNC) 1513 bp->b_proc = (struct proc *)0; 1514 else 1515 bp->b_proc = curproc; 1516 } 1517 /* 1518 * If the op is asynchronous and an i/o daemon is waiting 1519 * queue the request, wake it up and wait for completion 1520 * otherwise just do it ourselves. 1521 */ 1522 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1523 return (nfs_doio(bp)); 1524 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1525 if (nfs_iodwant[i]) { 1526 dp = &nfs_bqueue; 1527 if (dp->b_actf == NULL) { 1528 dp->b_actl = bp; 1529 bp->b_actf = dp; 1530 } else { 1531 dp->b_actf->b_actl = bp; 1532 bp->b_actf = dp->b_actf; 1533 } 1534 dp->b_actf = bp; 1535 bp->b_actl = dp; 1536 fnd++; 1537 wakeup((caddr_t)&nfs_iodwant[i]); 1538 break; 1539 } 1540 } 1541 if (!fnd) 1542 error = nfs_doio(bp); 1543 return (error); 1544 } 1545 1546 /* 1547 * Fun and games with i/o 1548 * Essentially play ubasetup() and disk interrupt service routine by 1549 * mapping the data buffer into kernel virtual space and doing the 1550 * nfs read or write rpc's from it. 1551 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1552 * otherwise it is called by the nfsiods to do what would normally be 1553 * partially disk interrupt driven. 1554 */ 1555 nfs_doio(bp) 1556 register struct buf *bp; 1557 { 1558 register struct uio *uiop; 1559 register struct vnode *vp; 1560 struct nfsnode *np; 1561 struct ucred *cr; 1562 int error; 1563 struct uio uio; 1564 struct iovec io; 1565 #if !defined(hp300) && !defined(i386) 1566 register struct pte *pte, *ppte; 1567 register caddr_t vaddr; 1568 int npf, npf2; 1569 int reg, o; 1570 caddr_t vbase; 1571 unsigned v; 1572 #endif 1573 1574 vp = bp->b_vp; 1575 np = VTONFS(vp); 1576 uiop = &uio; 1577 uiop->uio_iov = &io; 1578 uiop->uio_iovcnt = 1; 1579 uiop->uio_segflg = UIO_SYSSPACE; 1580 uiop->uio_procp = (struct proc *)0; 1581 1582 /* 1583 * For phys i/o, map the b_addr into kernel virtual space using 1584 * the Nfsiomap pte's 1585 * Also, add a temporary b_rcred for reading using the process's uid 1586 * and a guess at a group 1587 */ 1588 if (bp->b_flags & B_PHYS) { 1589 if (bp->b_flags & B_DIRTY) 1590 uiop->uio_procp = pageproc; 1591 cr = crcopy(uiop->uio_procp->p_ucred); 1592 /* mapping was already done by vmapbuf */ 1593 io.iov_base = bp->b_un.b_addr; 1594 1595 /* 1596 * And do the i/o rpc 1597 */ 1598 io.iov_len = uiop->uio_resid = bp->b_bcount; 1599 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1600 if (bp->b_flags & B_READ) { 1601 uiop->uio_rw = UIO_READ; 1602 nfsstats.read_physios++; 1603 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1604 (void) vnode_pager_uncache(vp); 1605 } else { 1606 uiop->uio_rw = UIO_WRITE; 1607 nfsstats.write_physios++; 1608 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1609 } 1610 1611 /* 1612 * Finally, release pte's used by physical i/o 1613 */ 1614 crfree(cr); 1615 } else { 1616 if (bp->b_flags & B_READ) { 1617 io.iov_len = uiop->uio_resid = bp->b_bcount; 1618 io.iov_base = bp->b_un.b_addr; 1619 uiop->uio_rw = UIO_READ; 1620 switch (vp->v_type) { 1621 case VREG: 1622 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1623 nfsstats.read_bios++; 1624 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1625 break; 1626 case VLNK: 1627 uiop->uio_offset = 0; 1628 nfsstats.readlink_bios++; 1629 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1630 break; 1631 case VDIR: 1632 uiop->uio_offset = bp->b_lblkno; 1633 nfsstats.readdir_bios++; 1634 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1635 /* 1636 * Save offset cookie in b_blkno. 1637 */ 1638 bp->b_blkno = uiop->uio_offset; 1639 break; 1640 }; 1641 bp->b_error = error; 1642 } else { 1643 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1644 - bp->b_dirtyoff; 1645 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1646 + bp->b_dirtyoff; 1647 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1648 uiop->uio_rw = UIO_WRITE; 1649 nfsstats.write_bios++; 1650 bp->b_error = error = nfs_writerpc(vp, uiop, 1651 bp->b_wcred); 1652 if (error) { 1653 np->n_error = error; 1654 np->n_flag |= NWRITEERR; 1655 } 1656 bp->b_dirtyoff = bp->b_dirtyend = 0; 1657 } 1658 } 1659 if (error) 1660 bp->b_flags |= B_ERROR; 1661 bp->b_resid = uiop->uio_resid; 1662 biodone(bp); 1663 return (error); 1664 } 1665 1666 /* 1667 * Mmap a file 1668 * 1669 * NB Currently unsupported. 1670 */ 1671 /* ARGSUSED */ 1672 nfs_mmap(vp, fflags, cred, p) 1673 struct vnode *vp; 1674 int fflags; 1675 struct ucred *cred; 1676 struct proc *p; 1677 { 1678 1679 return (EINVAL); 1680 } 1681 1682 /* 1683 * Flush all the blocks associated with a vnode. 1684 * Walk through the buffer pool and push any dirty pages 1685 * associated with the vnode. 1686 */ 1687 /* ARGSUSED */ 1688 nfs_fsync(vp, fflags, cred, waitfor, p) 1689 register struct vnode *vp; 1690 int fflags; 1691 struct ucred *cred; 1692 int waitfor; 1693 struct proc *p; 1694 { 1695 register struct nfsnode *np = VTONFS(vp); 1696 int error = 0; 1697 1698 if (np->n_flag & NMODIFIED) { 1699 np->n_flag &= ~NMODIFIED; 1700 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1701 } 1702 if (!error && (np->n_flag & NWRITEERR)) 1703 error = np->n_error; 1704 return (error); 1705 } 1706 1707 /* 1708 * NFS advisory byte-level locks. 1709 * Currently unsupported. 1710 */ 1711 nfs_advlock(vp, id, op, fl, flags) 1712 struct vnode *vp; 1713 caddr_t id; 1714 int op; 1715 struct flock *fl; 1716 int flags; 1717 { 1718 register struct nfsnode *np = VTONFS(vp); 1719 1720 return (lf_advlock(&(np->n_lockf), np->n_size, id, op, fl, flags)); 1721 } 1722 1723 /* 1724 * Print out the contents of an nfsnode. 1725 */ 1726 nfs_print(vp) 1727 struct vnode *vp; 1728 { 1729 register struct nfsnode *np = VTONFS(vp); 1730 1731 printf("tag VT_NFS, fileid %d fsid 0x%x", 1732 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1733 #ifdef FIFO 1734 if (vp->v_type == VFIFO) 1735 fifo_printinfo(vp); 1736 #endif /* FIFO */ 1737 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1738 if (np->n_lockholder == 0) 1739 return; 1740 printf("\towner pid %d", np->n_lockholder); 1741 if (np->n_lockwaiter) 1742 printf(" waiting pid %d", np->n_lockwaiter); 1743 printf("\n"); 1744 } 1745 1746 1747 /* 1748 * Attribute cache routines. 1749 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1750 * that are on the mbuf list 1751 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1752 * error otherwise 1753 */ 1754 1755 /* 1756 * Load the attribute cache (that lives in the nfsnode entry) with 1757 * the values on the mbuf list and 1758 * Iff vap not NULL 1759 * copy the attributes to *vaper 1760 */ 1761 nfs_loadattrcache(vpp, mdp, dposp, vaper) 1762 struct vnode **vpp; 1763 struct mbuf **mdp; 1764 caddr_t *dposp; 1765 struct vattr *vaper; 1766 { 1767 register struct vnode *vp = *vpp; 1768 register struct vattr *vap; 1769 register struct nfsv2_fattr *fp; 1770 extern struct vnodeops spec_nfsv2nodeops; 1771 register struct nfsnode *np; 1772 register long t1; 1773 caddr_t dpos, cp2; 1774 int error = 0; 1775 struct mbuf *md; 1776 enum vtype type; 1777 u_short mode; 1778 long rdev; 1779 struct timeval mtime; 1780 struct vnode *nvp; 1781 1782 md = *mdp; 1783 dpos = *dposp; 1784 t1 = (mtod(md, caddr_t)+md->m_len)-dpos; 1785 if (error = nfsm_disct(&md, &dpos, NFSX_FATTR, t1, TRUE, &cp2)) 1786 return (error); 1787 fp = (struct nfsv2_fattr *)cp2; 1788 type = nfstov_type(fp->fa_type); 1789 mode = fxdr_unsigned(u_short, fp->fa_mode); 1790 if (type == VNON) 1791 type = IFTOVT(mode); 1792 rdev = fxdr_unsigned(long, fp->fa_rdev); 1793 fxdr_time(&fp->fa_mtime, &mtime); 1794 /* 1795 * If v_type == VNON it is a new node, so fill in the v_type, 1796 * n_mtime fields. Check to see if it represents a special 1797 * device, and if so, check for a possible alias. Once the 1798 * correct vnode has been obtained, fill in the rest of the 1799 * information. 1800 */ 1801 np = VTONFS(vp); 1802 if (vp->v_type == VNON) { 1803 if (type == VCHR && rdev == 0xffffffff) 1804 vp->v_type = type = VFIFO; 1805 else 1806 vp->v_type = type; 1807 if (vp->v_type == VFIFO) { 1808 #ifdef FIFO 1809 extern struct vnodeops fifo_nfsv2nodeops; 1810 vp->v_op = &fifo_nfsv2nodeops; 1811 #else 1812 return (EOPNOTSUPP); 1813 #endif /* FIFO */ 1814 } 1815 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1816 vp->v_op = &spec_nfsv2nodeops; 1817 if (nvp = checkalias(vp, (dev_t)rdev, vp->v_mount)) { 1818 /* 1819 * Reinitialize aliased node. 1820 */ 1821 np = VTONFS(nvp); 1822 np->n_vnode = nvp; 1823 np->n_flag = 0; 1824 nfs_lock(nvp); 1825 bcopy((caddr_t)&VTONFS(vp)->n_fh, 1826 (caddr_t)&np->n_fh, NFSX_FH); 1827 insque(np, nfs_hash(&np->n_fh)); 1828 np->n_attrstamp = 0; 1829 np->n_sillyrename = (struct sillyrename *)0; 1830 /* 1831 * Discard unneeded vnode and update actual one 1832 */ 1833 vput(vp); 1834 *vpp = nvp; 1835 } 1836 } 1837 np->n_mtime = mtime.tv_sec; 1838 } 1839 vap = &np->n_vattr; 1840 vap->va_type = type; 1841 vap->va_mode = (mode & 07777); 1842 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1843 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1844 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1845 vap->va_size = fxdr_unsigned(u_long, fp->fa_size); 1846 if ((np->n_flag & NMODIFIED) == 0 || vap->va_size > np->n_size) { 1847 np->n_size = vap->va_size; 1848 vnode_pager_setsize(vp, np->n_size); 1849 } 1850 vap->va_size_rsv = 0; 1851 vap->va_blocksize = fxdr_unsigned(long, fp->fa_blocksize); 1852 vap->va_rdev = (dev_t)rdev; 1853 vap->va_bytes = fxdr_unsigned(long, fp->fa_blocks) * NFS_FABLKSIZE; 1854 vap->va_bytes_rsv = 0; 1855 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1856 vap->va_fileid = fxdr_unsigned(long, fp->fa_fileid); 1857 /* jfw@ksr.com 6/2/93 */ 1858 #if 0 /* bad assumption; Suns make full (and obvious) use of .usec fields */ 1859 vap->va_atime.tv_sec = fxdr_unsigned(long, fp->fa_atime.tv_sec); 1860 vap->va_atime.tv_usec = 0; 1861 vap->va_flags = fxdr_unsigned(u_long, fp->fa_atime.tv_usec); 1862 vap->va_mtime = mtime; 1863 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa_ctime.tv_sec); 1864 vap->va_ctime.tv_usec = 0; 1865 vap->va_gen = fxdr_unsigned(u_long, fp->fa_ctime.tv_usec); 1866 #else 1867 fxdr_time(&fp->fa_atime, &vap->va_atime); 1868 vap->va_mtime = mtime; 1869 fxdr_time(&fp->fa_ctime, &vap->va_ctime); 1870 vap->va_gen = 0; /* can reliably learn nothing about this via NFS. */ 1871 vap->va_flags = 0; /* can reliably learn nothing about this via NFS. */ 1872 #endif 1873 np->n_attrstamp = time.tv_sec; 1874 *dposp = dpos; 1875 *mdp = md; 1876 if (vaper != NULL) { 1877 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1878 if ((np->n_flag & NMODIFIED) && (np->n_size > vap->va_size)) 1879 vaper->va_size = np->n_size; 1880 } 1881 return (0); 1882 } 1883 1884 /* 1885 * Check the time stamp 1886 * If the cache is valid, copy contents to *vap and return 0 1887 * otherwise return an error 1888 */ 1889 nfs_getattrcache(vp, vap) 1890 register struct vnode *vp; 1891 struct vattr *vap; 1892 { 1893 register struct nfsnode *np; 1894 1895 np = VTONFS(vp); 1896 if ((time.tv_sec-np->n_attrstamp) < NFS_ATTRTIMEO) { 1897 nfsstats.attrcache_hits++; 1898 bcopy((caddr_t)&np->n_vattr,(caddr_t)vap,sizeof(struct vattr)); 1899 if ((np->n_flag & NMODIFIED) == 0) { 1900 np->n_size = vap->va_size; 1901 vnode_pager_setsize(vp, np->n_size); 1902 } else if (np->n_size > vap->va_size) 1903 vap->va_size = np->n_size; 1904 return (0); 1905 } else { 1906 nfsstats.attrcache_misses++; 1907 return (ENOENT); 1908 } 1909 } 1910