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 1.13 1993/11/20 09:40:55 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 "miscfs/specfs/specdev.h" /* XXX */ 56 #include "miscfs/fifofs/fifo.h" /* XXX */ 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 == CREATE || flag == RENAME) && error == ENOENT) 499 error = EJUSTRETURN; 500 if (flag != LOOKUP && *ndp->ni_next == 0) 501 ndp->ni_nameiop |= SAVENAME; 502 return (error); 503 } 504 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 505 506 /* 507 * Handle DELETE and RENAME cases... 508 */ 509 if (flag == DELETE && *ndp->ni_next == 0) { 510 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 511 VREF(vp); 512 newvp = vp; 513 np = VTONFS(vp); 514 } else { 515 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 516 nfs_lock(vp); 517 m_freem(mrep); 518 return (error); 519 } 520 newvp = NFSTOV(np); 521 } 522 if (error = 523 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 524 nfs_lock(vp); 525 if (newvp != vp) 526 nfs_nput(newvp); 527 else 528 vrele(vp); 529 m_freem(mrep); 530 return (error); 531 } 532 ndp->ni_vp = newvp; 533 if (lockparent || vp == newvp) 534 nfs_lock(vp); 535 m_freem(mrep); 536 ndp->ni_nameiop |= SAVENAME; 537 return (0); 538 } 539 540 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 541 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 542 nfs_lock(vp); 543 m_freem(mrep); 544 return (EISDIR); 545 } 546 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 547 nfs_lock(vp); 548 m_freem(mrep); 549 return (error); 550 } 551 newvp = NFSTOV(np); 552 if (error = 553 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 554 nfs_lock(vp); 555 nfs_nput(newvp); 556 m_freem(mrep); 557 return (error); 558 } 559 ndp->ni_vp = newvp; 560 if (lockparent) 561 nfs_lock(vp); 562 m_freem(mrep); 563 ndp->ni_nameiop |= SAVENAME; 564 return (0); 565 } 566 567 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 568 VREF(vp); 569 newvp = vp; 570 np = VTONFS(vp); 571 } else if (ndp->ni_isdotdot) { 572 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 573 nfs_lock(vp); 574 m_freem(mrep); 575 return (error); 576 } 577 newvp = NFSTOV(np); 578 } else { 579 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 580 nfs_lock(vp); 581 m_freem(mrep); 582 return (error); 583 } 584 newvp = NFSTOV(np); 585 } 586 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 587 nfs_lock(vp); 588 if (newvp != vp) 589 nfs_nput(newvp); 590 else 591 vrele(vp); 592 m_freem(mrep); 593 return (error); 594 } 595 m_freem(mrep); 596 597 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 598 nfs_lock(vp); 599 ndp->ni_vp = newvp; 600 if (flag != LOOKUP && *ndp->ni_next == 0) 601 ndp->ni_nameiop |= SAVENAME; 602 if (error == 0 && ndp->ni_makeentry) { 603 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 604 cache_enter(ndp); 605 } 606 return (error); 607 } 608 609 /* 610 * nfs read call. 611 * Just call nfs_bioread() to do the work. 612 */ 613 nfs_read(vp, uiop, ioflag, cred) 614 register struct vnode *vp; 615 struct uio *uiop; 616 int ioflag; 617 struct ucred *cred; 618 { 619 if (vp->v_type != VREG) 620 return (EPERM); 621 return (nfs_bioread(vp, uiop, ioflag, cred)); 622 } 623 624 /* 625 * nfs readlink call 626 */ 627 nfs_readlink(vp, uiop, cred) 628 struct vnode *vp; 629 struct uio *uiop; 630 struct ucred *cred; 631 { 632 if (vp->v_type != VLNK) 633 return (EPERM); 634 return (nfs_bioread(vp, uiop, 0, cred)); 635 } 636 637 /* 638 * Do a readlink rpc. 639 * Called by nfs_doio() from below the buffer cache. 640 */ 641 nfs_readlinkrpc(vp, uiop, cred) 642 register struct vnode *vp; 643 struct uio *uiop; 644 struct ucred *cred; 645 { 646 register u_long *tl; 647 register caddr_t cp; 648 register long t1; 649 caddr_t bpos, dpos, cp2; 650 u_long xid; 651 int error = 0; 652 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 653 long len; 654 655 nfsstats.rpccnt[NFSPROC_READLINK]++; 656 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 657 nfsm_fhtom(vp); 658 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0); 659 nfsm_strsiz(len, NFS_MAXPATHLEN); 660 nfsm_mtouio(uiop, len); 661 nfsm_reqdone; 662 return (error); 663 } 664 665 /* 666 * nfs read rpc call 667 * Ditto above 668 */ 669 nfs_readrpc(vp, uiop, cred) 670 register struct vnode *vp; 671 struct uio *uiop; 672 struct ucred *cred; 673 { 674 register u_long *tl; 675 register caddr_t cp; 676 register long t1; 677 caddr_t bpos, dpos, cp2; 678 u_long xid; 679 int error = 0; 680 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 681 struct nfsmount *nmp; 682 long len, retlen, tsiz; 683 684 nmp = VFSTONFS(vp->v_mount); 685 tsiz = uiop->uio_resid; 686 while (tsiz > 0) { 687 nfsstats.rpccnt[NFSPROC_READ]++; 688 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 689 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 690 nfsm_fhtom(vp); 691 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 692 *tl++ = txdr_unsigned(uiop->uio_offset); 693 *tl++ = txdr_unsigned(len); 694 *tl = 0; 695 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1); 696 nfsm_loadattr(vp, (struct vattr *)0); 697 nfsm_strsiz(retlen, nmp->nm_rsize); 698 nfsm_mtouio(uiop, retlen); 699 m_freem(mrep); 700 if (retlen < len) 701 tsiz = 0; 702 else 703 tsiz -= len; 704 } 705 nfsmout: 706 return (error); 707 } 708 709 /* 710 * nfs write call 711 */ 712 nfs_writerpc(vp, uiop, cred) 713 register struct vnode *vp; 714 struct uio *uiop; 715 struct ucred *cred; 716 { 717 register u_long *tl; 718 register caddr_t cp; 719 register long t1; 720 caddr_t bpos, dpos; 721 u_long xid; 722 int error = 0; 723 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 724 struct nfsmount *nmp; 725 long len, tsiz; 726 727 nmp = VFSTONFS(vp->v_mount); 728 tsiz = uiop->uio_resid; 729 while (tsiz > 0) { 730 nfsstats.rpccnt[NFSPROC_WRITE]++; 731 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 732 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 733 NFSX_FH+NFSX_UNSIGNED*4); 734 nfsm_fhtom(vp); 735 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 736 *(tl+1) = txdr_unsigned(uiop->uio_offset); 737 *(tl+3) = txdr_unsigned(len); 738 nfsm_uiotom(uiop, len); 739 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1); 740 nfsm_loadattr(vp, (struct vattr *)0); 741 m_freem(mrep); 742 tsiz -= len; 743 } 744 nfsmout: 745 return (error); 746 } 747 748 /* 749 * nfs mknod call 750 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 751 * set to specify the file type and the size field for rdev. 752 */ 753 /* ARGSUSED */ 754 nfs_mknod(ndp, vap, cred, p) 755 struct nameidata *ndp; 756 struct ucred *cred; 757 register struct vattr *vap; 758 struct proc *p; 759 { 760 register struct nfsv2_sattr *sp; 761 register u_long *tl; 762 register caddr_t cp; 763 register long t1, t2; 764 caddr_t bpos, dpos; 765 u_long xid; 766 int error = 0; 767 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 768 u_long rdev; 769 770 if (vap->va_type == VCHR || vap->va_type == VBLK) 771 rdev = txdr_unsigned(vap->va_rdev); 772 #ifdef FIFO 773 else if (vap->va_type == VFIFO) 774 rdev = 0xffffffff; 775 #endif /* FIFO */ 776 else { 777 VOP_ABORTOP(ndp); 778 vput(ndp->ni_dvp); 779 return (EOPNOTSUPP); 780 } 781 nfsstats.rpccnt[NFSPROC_CREATE]++; 782 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 783 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 784 nfsm_fhtom(ndp->ni_dvp); 785 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 786 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 787 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 788 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 789 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 790 sp->sa_size = rdev; 791 /* or should these be VNOVAL ?? */ 792 txdr_time(&vap->va_atime, &sp->sa_atime); 793 txdr_time(&vap->va_mtime, &sp->sa_mtime); 794 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 795 nfsm_reqdone; 796 FREE(ndp->ni_pnbuf, M_NAMEI); 797 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 798 nfs_nput(ndp->ni_dvp); 799 return (error); 800 } 801 802 /* 803 * nfs file create call 804 */ 805 nfs_create(ndp, vap, p) 806 register struct nameidata *ndp; 807 register struct vattr *vap; 808 struct proc *p; 809 { 810 register struct nfsv2_sattr *sp; 811 register u_long *tl; 812 register caddr_t cp; 813 register long t1, t2; 814 caddr_t bpos, dpos, cp2; 815 u_long xid; 816 int error = 0; 817 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 818 819 nfsstats.rpccnt[NFSPROC_CREATE]++; 820 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 821 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); 822 nfsm_fhtom(ndp->ni_dvp); 823 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 824 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 825 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 826 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 827 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 828 sp->sa_size = txdr_unsigned(0); 829 /* or should these be VNOVAL ?? */ 830 txdr_time(&vap->va_atime, &sp->sa_atime); 831 txdr_time(&vap->va_mtime, &sp->sa_mtime); 832 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 833 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 834 nfsm_reqdone; 835 FREE(ndp->ni_pnbuf, M_NAMEI); 836 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 837 nfs_nput(ndp->ni_dvp); 838 return (error); 839 } 840 841 /* 842 * nfs file remove call 843 * To try and make nfs semantics closer to ufs semantics, a file that has 844 * other processes using the vnode is renamed instead of removed and then 845 * removed later on the last close. 846 * - If v_usecount > 1 847 * If a rename is not already in the works 848 * call nfs_sillyrename() to set it up 849 * else 850 * do the remove rpc 851 */ 852 nfs_remove(ndp, p) 853 register struct nameidata *ndp; 854 struct proc *p; 855 { 856 register struct vnode *vp = ndp->ni_vp; 857 register struct nfsnode *np = VTONFS(ndp->ni_vp); 858 register u_long *tl; 859 register caddr_t cp; 860 register long t1, t2; 861 caddr_t bpos, dpos; 862 u_long xid; 863 int error = 0; 864 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 865 866 if (vp->v_usecount > 1) { 867 if (!np->n_sillyrename) 868 error = nfs_sillyrename(ndp, p); 869 } else { 870 nfsstats.rpccnt[NFSPROC_REMOVE]++; 871 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 872 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 873 nfsm_fhtom(ndp->ni_dvp); 874 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 875 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1); 876 nfsm_reqdone; 877 FREE(ndp->ni_pnbuf, M_NAMEI); 878 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 879 /* 880 * Kludge City: If the first reply to the remove rpc is lost.. 881 * the reply to the retransmitted request will be ENOENT 882 * since the file was in fact removed 883 * Therefore, we cheat and return success. 884 */ 885 if (error == ENOENT) 886 error = 0; 887 } 888 np->n_attrstamp = 0; 889 if (ndp->ni_dvp == vp) 890 vrele(vp); 891 else 892 nfs_nput(ndp->ni_dvp); 893 nfs_nput(vp); 894 return (error); 895 } 896 897 /* 898 * nfs file remove rpc called from nfs_inactive 899 */ 900 nfs_removeit(sp, p) 901 register struct sillyrename *sp; 902 struct proc *p; 903 { 904 register u_long *tl; 905 register caddr_t cp; 906 register long t1, t2; 907 caddr_t bpos, dpos; 908 u_long xid; 909 int error = 0; 910 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 911 912 nfsstats.rpccnt[NFSPROC_REMOVE]++; 913 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred, 914 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 915 nfsm_fhtom(sp->s_dvp); 916 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 917 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1); 918 nfsm_reqdone; 919 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 920 return (error); 921 } 922 923 /* 924 * nfs file rename call 925 */ 926 nfs_rename(sndp, tndp, p) 927 register struct nameidata *sndp, *tndp; 928 struct proc *p; 929 { 930 register u_long *tl; 931 register caddr_t cp; 932 register long t1, t2; 933 caddr_t bpos, dpos; 934 u_long xid; 935 int error = 0; 936 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 937 938 nfsstats.rpccnt[NFSPROC_RENAME]++; 939 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 940 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 941 nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/ 942 nfsm_fhtom(sndp->ni_dvp); 943 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 944 nfsm_fhtom(tndp->ni_dvp); 945 nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN); 946 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 947 nfsm_reqdone; 948 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 949 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 950 if (sndp->ni_vp->v_type == VDIR) { 951 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 952 cache_purge(tndp->ni_dvp); 953 cache_purge(sndp->ni_dvp); 954 } 955 if (tndp->ni_dvp == tndp->ni_vp) 956 vrele(tndp->ni_dvp); 957 else 958 vput(tndp->ni_dvp); 959 if (tndp->ni_vp) 960 vput(tndp->ni_vp); 961 vrele(sndp->ni_dvp); 962 vrele(sndp->ni_vp); 963 /* 964 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 965 */ 966 if (error == ENOENT) 967 error = 0; 968 return (error); 969 } 970 971 /* 972 * nfs file rename rpc called from nfs_remove() above 973 */ 974 nfs_renameit(sndp, sp, p) 975 register struct nameidata *sndp; 976 register struct sillyrename *sp; 977 struct proc *p; 978 { 979 register u_long *tl; 980 register caddr_t cp; 981 register long t1, t2; 982 caddr_t bpos, dpos; 983 u_long xid; 984 int error = 0; 985 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 986 987 nfsstats.rpccnt[NFSPROC_RENAME]++; 988 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred, 989 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + 990 nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/ 991 nfsm_fhtom(sndp->ni_dvp); 992 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); 993 nfsm_fhtom(sp->s_dvp); 994 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 995 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 996 nfsm_reqdone; 997 FREE(sndp->ni_pnbuf, M_NAMEI); 998 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 999 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 1000 return (error); 1001 } 1002 1003 /* 1004 * nfs hard link create call 1005 */ 1006 nfs_link(vp, ndp, p) 1007 register struct vnode *vp; 1008 register struct nameidata *ndp; 1009 struct proc *p; 1010 { 1011 register u_long *tl; 1012 register caddr_t cp; 1013 register long t1, t2; 1014 caddr_t bpos, dpos; 1015 u_long xid; 1016 int error = 0; 1017 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1018 1019 if (ndp->ni_dvp != vp) 1020 nfs_lock(vp); 1021 nfsstats.rpccnt[NFSPROC_LINK]++; 1022 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1023 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 1024 nfsm_fhtom(vp); 1025 nfsm_fhtom(ndp->ni_dvp); 1026 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1027 nfsm_request(vp, NFSPROC_LINK, p, 1); 1028 nfsm_reqdone; 1029 FREE(ndp->ni_pnbuf, M_NAMEI); 1030 VTONFS(vp)->n_attrstamp = 0; 1031 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1032 if (ndp->ni_dvp != vp) 1033 nfs_unlock(vp); 1034 nfs_nput(ndp->ni_dvp); 1035 /* 1036 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1037 */ 1038 if (error == EEXIST) 1039 error = 0; 1040 return (error); 1041 } 1042 1043 /* 1044 * nfs symbolic link create call 1045 */ 1046 nfs_symlink(ndp, vap, nm, p) 1047 struct nameidata *ndp; 1048 struct vattr *vap; 1049 char *nm; /* is this the path ?? */ 1050 struct proc *p; 1051 { 1052 register struct nfsv2_sattr *sp; 1053 register u_long *tl; 1054 register caddr_t cp; 1055 register long t1, t2; 1056 caddr_t bpos, dpos; 1057 u_long xid; 1058 int error = 0; 1059 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1060 1061 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1062 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1063 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED); 1064 nfsm_fhtom(ndp->ni_dvp); 1065 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1066 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1067 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1068 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1069 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1070 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1071 sp->sa_size = txdr_unsigned(VNOVAL); 1072 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1073 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1074 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1); 1075 nfsm_reqdone; 1076 FREE(ndp->ni_pnbuf, M_NAMEI); 1077 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1078 nfs_nput(ndp->ni_dvp); 1079 /* 1080 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1081 */ 1082 if (error == EEXIST) 1083 error = 0; 1084 return (error); 1085 } 1086 1087 /* 1088 * nfs make dir call 1089 */ 1090 nfs_mkdir(ndp, vap, p) 1091 register struct nameidata *ndp; 1092 struct vattr *vap; 1093 struct proc *p; 1094 { 1095 register struct nfsv2_sattr *sp; 1096 register u_long *tl; 1097 register caddr_t cp; 1098 register long t1, t2; 1099 register int len; 1100 caddr_t bpos, dpos, cp2; 1101 u_long xid; 1102 int error = 0, firsttry = 1; 1103 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1104 1105 len = ndp->ni_namelen; 1106 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1107 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1108 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1109 nfsm_fhtom(ndp->ni_dvp); 1110 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1111 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1112 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1113 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1114 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1115 sp->sa_size = txdr_unsigned(VNOVAL); 1116 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1117 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1118 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1); 1119 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1120 nfsm_reqdone; 1121 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1122 /* 1123 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1124 * if we can succeed in looking up the directory. 1125 * "firsttry" is necessary since the macros may "goto nfsmout" which 1126 * is above the if on errors. (Ugh) 1127 */ 1128 if (error == EEXIST && firsttry) { 1129 firsttry = 0; 1130 error = 0; 1131 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1132 ndp->ni_vp = NULL; 1133 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1134 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1135 nfsm_fhtom(ndp->ni_dvp); 1136 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 1137 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1); 1138 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1139 if (ndp->ni_vp->v_type != VDIR) { 1140 vput(ndp->ni_vp); 1141 error = EEXIST; 1142 } 1143 m_freem(mrep); 1144 } 1145 FREE(ndp->ni_pnbuf, M_NAMEI); 1146 nfs_nput(ndp->ni_dvp); 1147 return (error); 1148 } 1149 1150 /* 1151 * nfs remove directory call 1152 */ 1153 nfs_rmdir(ndp, p) 1154 register struct nameidata *ndp; 1155 struct proc *p; 1156 { 1157 register u_long *tl; 1158 register caddr_t cp; 1159 register long t1, t2; 1160 caddr_t bpos, dpos; 1161 u_long xid; 1162 int error = 0; 1163 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1164 1165 if (ndp->ni_dvp == ndp->ni_vp) { 1166 vrele(ndp->ni_dvp); 1167 nfs_nput(ndp->ni_dvp); 1168 return (EINVAL); 1169 } 1170 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1171 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1172 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); 1173 nfsm_fhtom(ndp->ni_dvp); 1174 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); 1175 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1); 1176 nfsm_reqdone; 1177 FREE(ndp->ni_pnbuf, M_NAMEI); 1178 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1179 cache_purge(ndp->ni_dvp); 1180 cache_purge(ndp->ni_vp); 1181 nfs_nput(ndp->ni_vp); 1182 nfs_nput(ndp->ni_dvp); 1183 /* 1184 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1185 */ 1186 if (error == ENOENT) 1187 error = 0; 1188 return (error); 1189 } 1190 1191 /* 1192 * nfs readdir call 1193 * Although cookie is defined as opaque, I translate it to/from net byte 1194 * order so that it looks more sensible. This appears consistent with the 1195 * Ultrix implementation of NFS. 1196 */ 1197 nfs_readdir(vp, uiop, cred, eofflagp, cookies, ncookies) 1198 register struct vnode *vp; 1199 struct uio *uiop; 1200 struct ucred *cred; 1201 int *eofflagp; 1202 u_int *cookies; 1203 int ncookies; 1204 { 1205 register struct nfsnode *np = VTONFS(vp); 1206 int tresid, error; 1207 struct vattr vattr; 1208 1209 /* 1210 * Since NFS mounting isn't propagated, 1211 * we don't need to handle cookies here! 1212 */ 1213 if (cookies) 1214 panic("nfs_readdir"); 1215 1216 if (vp->v_type != VDIR) 1217 return (EPERM); 1218 /* 1219 * First, check for hit on the EOF offset cache 1220 */ 1221 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1222 (np->n_flag & NMODIFIED) == 0 && 1223 nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 && 1224 np->n_mtime == vattr.va_mtime.tv_sec) { 1225 *eofflagp = 1; 1226 nfsstats.direofcache_hits++; 1227 return (0); 1228 } 1229 1230 /* 1231 * Call nfs_bioread() to do the real work. 1232 */ 1233 tresid = uiop->uio_resid; 1234 error = nfs_bioread(vp, uiop, 0, cred); 1235 1236 if (!error && uiop->uio_resid == tresid) { 1237 *eofflagp = 1; 1238 nfsstats.direofcache_misses++; 1239 } else 1240 *eofflagp = 0; 1241 return (error); 1242 } 1243 1244 /* 1245 * Readdir rpc call. 1246 * Called from below the buffer cache by nfs_doio(). 1247 */ 1248 nfs_readdirrpc(vp, uiop, cred) 1249 register struct vnode *vp; 1250 struct uio *uiop; 1251 struct ucred *cred; 1252 { 1253 register long len; 1254 register struct direct *dp; 1255 register u_long *tl; 1256 register caddr_t cp; 1257 register long t1; 1258 long tlen, lastlen; 1259 caddr_t bpos, dpos, cp2; 1260 u_long xid; 1261 int error = 0; 1262 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1263 struct mbuf *md2; 1264 caddr_t dpos2; 1265 int siz; 1266 int more_dirs = 1; 1267 off_t off, savoff; 1268 struct direct *savdp; 1269 struct nfsmount *nmp; 1270 struct nfsnode *np = VTONFS(vp); 1271 long tresid; 1272 1273 nmp = VFSTONFS(vp->v_mount); 1274 tresid = uiop->uio_resid; 1275 /* 1276 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1277 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1278 * The stopping criteria is EOF or buffer full. 1279 */ 1280 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1281 nfsstats.rpccnt[NFSPROC_READDIR]++; 1282 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1283 nfsm_fhtom(vp); 1284 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1285 *tl++ = txdr_unsigned(uiop->uio_offset); 1286 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1287 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1288 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0); 1289 siz = 0; 1290 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 1291 more_dirs = fxdr_unsigned(int, *tl); 1292 1293 /* Save the position so that we can do nfsm_mtouio() later */ 1294 dpos2 = dpos; 1295 md2 = md; 1296 1297 /* loop thru the dir entries, doctoring them to 4bsd form */ 1298 off = uiop->uio_offset; 1299 #ifdef lint 1300 dp = (struct direct *)0; 1301 #endif /* lint */ 1302 while (more_dirs && siz < uiop->uio_resid) { 1303 savoff = off; /* Hold onto offset and dp */ 1304 savdp = dp; 1305 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1306 dp = (struct direct *)tl; 1307 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1308 len = fxdr_unsigned(int, *tl); 1309 if (len <= 0 || len > NFS_MAXNAMLEN) { 1310 error = EBADRPC; 1311 m_freem(mrep); 1312 goto nfsmout; 1313 } 1314 dp->d_namlen = (u_short)len; 1315 nfsm_adv(len); /* Point past name */ 1316 tlen = nfsm_rndup(len); 1317 /* 1318 * This should not be necessary, but some servers have 1319 * broken XDR such that these bytes are not null filled. 1320 */ 1321 if (tlen != len) { 1322 *dpos = '\0'; /* Null-terminate */ 1323 nfsm_adv(tlen - len); 1324 len = tlen; 1325 } 1326 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1327 off = fxdr_unsigned(off_t, *tl); 1328 *tl++ = 0; /* Ensures null termination of name */ 1329 more_dirs = fxdr_unsigned(int, *tl); 1330 dp->d_reclen = len+4*NFSX_UNSIGNED; 1331 siz += dp->d_reclen; 1332 } 1333 /* 1334 * If at end of rpc data, get the eof boolean 1335 */ 1336 if (!more_dirs) { 1337 nfsm_disecton(tl, u_long *, NFSX_UNSIGNED); 1338 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1339 1340 /* 1341 * If at EOF, cache directory offset 1342 */ 1343 if (!more_dirs) 1344 np->n_direofoffset = off; 1345 } 1346 /* 1347 * If there is too much to fit in the data buffer, use savoff and 1348 * savdp to trim off the last record. 1349 * --> we are not at eof 1350 */ 1351 if (siz > uiop->uio_resid) { 1352 off = savoff; 1353 siz -= dp->d_reclen; 1354 dp = savdp; 1355 more_dirs = 0; /* Paranoia */ 1356 } 1357 if (siz > 0) { 1358 lastlen = dp->d_reclen; 1359 md = md2; 1360 dpos = dpos2; 1361 nfsm_mtouio(uiop, siz); 1362 uiop->uio_offset = off; 1363 } else 1364 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1365 m_freem(mrep); 1366 } 1367 /* 1368 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1369 * by increasing d_reclen for the last record. 1370 */ 1371 if (uiop->uio_resid < tresid) { 1372 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1373 if (len > 0) { 1374 dp = (struct direct *) 1375 (uiop->uio_iov->iov_base - lastlen); 1376 dp->d_reclen += len; 1377 uiop->uio_iov->iov_base += len; 1378 uiop->uio_iov->iov_len -= len; 1379 uiop->uio_resid -= len; 1380 } 1381 } 1382 nfsmout: 1383 return (error); 1384 } 1385 1386 static char hextoasc[] = "0123456789abcdef"; 1387 1388 /* 1389 * Silly rename. To make the NFS filesystem that is stateless look a little 1390 * more like the "ufs" a remove of an active vnode is translated to a rename 1391 * to a funny looking filename that is removed by nfs_inactive on the 1392 * nfsnode. There is the potential for another process on a different client 1393 * to create the same funny name between the nfs_lookitup() fails and the 1394 * nfs_rename() completes, but... 1395 */ 1396 nfs_sillyrename(ndp, p) 1397 register struct nameidata *ndp; 1398 struct proc *p; 1399 { 1400 register struct nfsnode *np; 1401 register struct sillyrename *sp; 1402 int error; 1403 short pid; 1404 1405 np = VTONFS(ndp->ni_dvp); 1406 cache_purge(ndp->ni_dvp); 1407 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1408 M_NFSREQ, M_WAITOK); 1409 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1410 np = VTONFS(ndp->ni_vp); 1411 sp->s_cred = crdup(ndp->ni_cred); 1412 sp->s_dvp = ndp->ni_dvp; 1413 VREF(sp->s_dvp); 1414 1415 /* Fudge together a funny name */ 1416 pid = p->p_pid; 1417 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1418 sp->s_namlen = 12; 1419 sp->s_name[8] = hextoasc[pid & 0xf]; 1420 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1421 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1422 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1423 1424 /* Try lookitups until we get one that isn't there */ 1425 while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) { 1426 sp->s_name[4]++; 1427 if (sp->s_name[4] > 'z') { 1428 error = EINVAL; 1429 goto bad; 1430 } 1431 } 1432 if (error = nfs_renameit(ndp, sp, p)) 1433 goto bad; 1434 nfs_lookitup(sp, &np->n_fh, p); 1435 np->n_sillyrename = sp; 1436 return (0); 1437 bad: 1438 vrele(sp->s_dvp); 1439 crfree(sp->s_cred); 1440 free((caddr_t)sp, M_NFSREQ); 1441 return (error); 1442 } 1443 1444 /* 1445 * Look up a file name for silly rename stuff. 1446 * Just like nfs_lookup() except that it doesn't load returned values 1447 * into the nfsnode table. 1448 * If fhp != NULL it copies the returned file handle out 1449 */ 1450 nfs_lookitup(sp, fhp, p) 1451 register struct sillyrename *sp; 1452 nfsv2fh_t *fhp; 1453 struct proc *p; 1454 { 1455 register struct vnode *vp = sp->s_dvp; 1456 register u_long *tl; 1457 register caddr_t cp; 1458 register long t1, t2; 1459 caddr_t bpos, dpos, cp2; 1460 u_long xid; 1461 int error = 0; 1462 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1463 long len; 1464 1465 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1466 len = sp->s_namlen; 1467 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1468 nfsm_fhtom(vp); 1469 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1470 nfsm_request(vp, NFSPROC_LOOKUP, p, 1); 1471 if (fhp != NULL) { 1472 nfsm_disect(cp, caddr_t, NFSX_FH); 1473 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1474 } 1475 nfsm_reqdone; 1476 return (error); 1477 } 1478 1479 /* 1480 * Kludge City.. 1481 * - make nfs_bmap() essentially a no-op that does no translation 1482 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1483 * after mapping the physical addresses into Kernel Virtual space in the 1484 * nfsiobuf area. 1485 * (Maybe I could use the process's page mapping, but I was concerned that 1486 * Kernel Write might not be enabled and also figured copyout() would do 1487 * a lot more work than bcopy() and also it currently happens in the 1488 * context of the swapper process (2). 1489 */ 1490 nfs_bmap(vp, bn, vpp, bnp) 1491 struct vnode *vp; 1492 daddr_t bn; 1493 struct vnode **vpp; 1494 daddr_t *bnp; 1495 { 1496 if (vpp != NULL) 1497 *vpp = vp; 1498 if (bnp != NULL) 1499 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1500 return (0); 1501 } 1502 1503 /* 1504 * Strategy routine for phys. i/o 1505 * If the biod's are running, queue a request 1506 * otherwise just call nfs_doio() to get it done 1507 */ 1508 nfs_strategy(bp) 1509 register struct buf *bp; 1510 { 1511 register struct buf *dp; 1512 register int i; 1513 int error = 0; 1514 int fnd = 0; 1515 1516 /* 1517 * Set b_proc. It seems a bit silly to do it here, but since bread() 1518 * doesn't set it, I will. 1519 * Set b_proc == NULL for asynchronous ops, since these may still 1520 * be hanging about after the process terminates. 1521 */ 1522 if ((bp->b_flags & B_PHYS) == 0) { 1523 if (bp->b_flags & B_ASYNC) 1524 bp->b_proc = (struct proc *)0; 1525 else 1526 bp->b_proc = curproc; 1527 } 1528 /* 1529 * If the op is asynchronous and an i/o daemon is waiting 1530 * queue the request, wake it up and wait for completion 1531 * otherwise just do it ourselves. 1532 */ 1533 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1534 return (nfs_doio(bp)); 1535 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1536 if (nfs_iodwant[i]) { 1537 dp = &nfs_bqueue; 1538 if (dp->b_actf == NULL) { 1539 dp->b_actl = bp; 1540 bp->b_actf = dp; 1541 } else { 1542 dp->b_actf->b_actl = bp; 1543 bp->b_actf = dp->b_actf; 1544 } 1545 dp->b_actf = bp; 1546 bp->b_actl = dp; 1547 fnd++; 1548 wakeup((caddr_t)&nfs_iodwant[i]); 1549 break; 1550 } 1551 } 1552 if (!fnd) 1553 error = nfs_doio(bp); 1554 return (error); 1555 } 1556 1557 /* 1558 * Fun and games with i/o 1559 * Essentially play ubasetup() and disk interrupt service routine by 1560 * mapping the data buffer into kernel virtual space and doing the 1561 * nfs read or write rpc's from it. 1562 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1563 * otherwise it is called by the nfsiods to do what would normally be 1564 * partially disk interrupt driven. 1565 */ 1566 nfs_doio(bp) 1567 register struct buf *bp; 1568 { 1569 register struct uio *uiop; 1570 register struct vnode *vp; 1571 struct nfsnode *np; 1572 struct ucred *cr; 1573 int error; 1574 struct uio uio; 1575 struct iovec io; 1576 #if !defined(hp300) && !defined(i386) 1577 register struct pte *pte, *ppte; 1578 register caddr_t vaddr; 1579 int npf, npf2; 1580 int reg, o; 1581 caddr_t vbase; 1582 unsigned v; 1583 #endif 1584 1585 vp = bp->b_vp; 1586 np = VTONFS(vp); 1587 uiop = &uio; 1588 uiop->uio_iov = &io; 1589 uiop->uio_iovcnt = 1; 1590 uiop->uio_segflg = UIO_SYSSPACE; 1591 uiop->uio_procp = (struct proc *)0; 1592 1593 /* 1594 * For phys i/o, map the b_addr into kernel virtual space using 1595 * the Nfsiomap pte's 1596 * Also, add a temporary b_rcred for reading using the process's uid 1597 * and a guess at a group 1598 */ 1599 if (bp->b_flags & B_PHYS) { 1600 if (bp->b_flags & B_DIRTY) 1601 uiop->uio_procp = pageproc; 1602 cr = crcopy(uiop->uio_procp->p_ucred); 1603 /* mapping was already done by vmapbuf */ 1604 io.iov_base = bp->b_un.b_addr; 1605 1606 /* 1607 * And do the i/o rpc 1608 */ 1609 io.iov_len = uiop->uio_resid = bp->b_bcount; 1610 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1611 if (bp->b_flags & B_READ) { 1612 uiop->uio_rw = UIO_READ; 1613 nfsstats.read_physios++; 1614 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1615 (void) vnode_pager_uncache(vp); 1616 } else { 1617 uiop->uio_rw = UIO_WRITE; 1618 nfsstats.write_physios++; 1619 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1620 } 1621 1622 /* 1623 * Finally, release pte's used by physical i/o 1624 */ 1625 crfree(cr); 1626 } else { 1627 if (bp->b_flags & B_READ) { 1628 io.iov_len = uiop->uio_resid = bp->b_bcount; 1629 io.iov_base = bp->b_un.b_addr; 1630 uiop->uio_rw = UIO_READ; 1631 switch (vp->v_type) { 1632 case VREG: 1633 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1634 nfsstats.read_bios++; 1635 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1636 break; 1637 case VLNK: 1638 uiop->uio_offset = 0; 1639 nfsstats.readlink_bios++; 1640 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1641 break; 1642 case VDIR: 1643 uiop->uio_offset = bp->b_lblkno; 1644 nfsstats.readdir_bios++; 1645 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1646 /* 1647 * Save offset cookie in b_blkno. 1648 */ 1649 bp->b_blkno = uiop->uio_offset; 1650 break; 1651 }; 1652 bp->b_error = error; 1653 } else { 1654 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1655 - bp->b_dirtyoff; 1656 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1657 + bp->b_dirtyoff; 1658 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1659 uiop->uio_rw = UIO_WRITE; 1660 nfsstats.write_bios++; 1661 bp->b_error = error = nfs_writerpc(vp, uiop, 1662 bp->b_wcred); 1663 if (error) { 1664 np->n_error = error; 1665 np->n_flag |= NWRITEERR; 1666 } 1667 bp->b_dirtyoff = bp->b_dirtyend = 0; 1668 } 1669 } 1670 if (error) 1671 bp->b_flags |= B_ERROR; 1672 bp->b_resid = uiop->uio_resid; 1673 biodone(bp); 1674 return (error); 1675 } 1676 1677 /* 1678 * Mmap a file 1679 * 1680 * NB Currently unsupported. 1681 */ 1682 /* ARGSUSED */ 1683 nfs_mmap(vp, fflags, cred, p) 1684 struct vnode *vp; 1685 int fflags; 1686 struct ucred *cred; 1687 struct proc *p; 1688 { 1689 1690 return (EINVAL); 1691 } 1692 1693 /* 1694 * Flush all the blocks associated with a vnode. 1695 * Walk through the buffer pool and push any dirty pages 1696 * associated with the vnode. 1697 */ 1698 /* ARGSUSED */ 1699 nfs_fsync(vp, fflags, cred, waitfor, p) 1700 register struct vnode *vp; 1701 int fflags; 1702 struct ucred *cred; 1703 int waitfor; 1704 struct proc *p; 1705 { 1706 register struct nfsnode *np = VTONFS(vp); 1707 int error = 0; 1708 1709 if (np->n_flag & NMODIFIED) { 1710 np->n_flag &= ~NMODIFIED; 1711 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1712 } 1713 if (!error && (np->n_flag & NWRITEERR)) 1714 error = np->n_error; 1715 return (error); 1716 } 1717 1718 /* 1719 * NFS advisory byte-level locks. 1720 * Currently unsupported. 1721 */ 1722 nfs_advlock(vp, id, op, fl, flags) 1723 struct vnode *vp; 1724 caddr_t id; 1725 int op; 1726 struct flock *fl; 1727 int flags; 1728 { 1729 register struct nfsnode *np = VTONFS(vp); 1730 1731 return (lf_advlock(&(np->n_lockf), np->n_size, id, op, fl, flags)); 1732 } 1733 1734 /* 1735 * Print out the contents of an nfsnode. 1736 */ 1737 void 1738 nfs_print(vp) 1739 struct vnode *vp; 1740 { 1741 register struct nfsnode *np = VTONFS(vp); 1742 1743 printf("tag VT_NFS, fileid %d fsid 0x%x", 1744 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1745 #ifdef FIFO 1746 if (vp->v_type == VFIFO) 1747 fifo_printinfo(vp); 1748 #endif /* FIFO */ 1749 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1750 if (np->n_lockholder == 0) 1751 return; 1752 printf("\towner pid %d", np->n_lockholder); 1753 if (np->n_lockwaiter) 1754 printf(" waiting pid %d", np->n_lockwaiter); 1755 printf("\n"); 1756 } 1757 1758 1759 /* 1760 * Attribute cache routines. 1761 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1762 * that are on the mbuf list 1763 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1764 * error otherwise 1765 */ 1766 1767 /* 1768 * Load the attribute cache (that lives in the nfsnode entry) with 1769 * the values on the mbuf list and 1770 * Iff vap not NULL 1771 * copy the attributes to *vaper 1772 */ 1773 nfs_loadattrcache(vpp, mdp, dposp, vaper) 1774 struct vnode **vpp; 1775 struct mbuf **mdp; 1776 caddr_t *dposp; 1777 struct vattr *vaper; 1778 { 1779 register struct vnode *vp = *vpp; 1780 register struct vattr *vap; 1781 register struct nfsv2_fattr *fp; 1782 extern struct vnodeops spec_nfsv2nodeops; 1783 register struct nfsnode *np; 1784 register long t1; 1785 caddr_t dpos, cp2; 1786 int error = 0; 1787 struct mbuf *md; 1788 enum vtype type; 1789 u_short mode; 1790 long rdev; 1791 struct timeval mtime; 1792 struct vnode *nvp; 1793 1794 md = *mdp; 1795 dpos = *dposp; 1796 t1 = (mtod(md, caddr_t)+md->m_len)-dpos; 1797 if (error = nfsm_disct(&md, &dpos, NFSX_FATTR, t1, TRUE, &cp2)) 1798 return (error); 1799 fp = (struct nfsv2_fattr *)cp2; 1800 type = nfstov_type(fp->fa_type); 1801 mode = fxdr_unsigned(u_short, fp->fa_mode); 1802 if (type == VNON) 1803 type = IFTOVT(mode); 1804 rdev = fxdr_unsigned(long, fp->fa_rdev); 1805 fxdr_time(&fp->fa_mtime, &mtime); 1806 /* 1807 * If v_type == VNON it is a new node, so fill in the v_type, 1808 * n_mtime fields. Check to see if it represents a special 1809 * device, and if so, check for a possible alias. Once the 1810 * correct vnode has been obtained, fill in the rest of the 1811 * information. 1812 */ 1813 np = VTONFS(vp); 1814 if (vp->v_type == VNON) { 1815 if (type == VCHR && rdev == 0xffffffff) 1816 vp->v_type = type = VFIFO; 1817 else 1818 vp->v_type = type; 1819 if (vp->v_type == VFIFO) { 1820 #ifdef FIFO 1821 extern struct vnodeops fifo_nfsv2nodeops; 1822 vp->v_op = &fifo_nfsv2nodeops; 1823 #else 1824 return (EOPNOTSUPP); 1825 #endif /* FIFO */ 1826 } 1827 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1828 vp->v_op = &spec_nfsv2nodeops; 1829 if (nvp = checkalias(vp, (dev_t)rdev, vp->v_mount)) { 1830 /* 1831 * Reinitialize aliased node. 1832 */ 1833 np = VTONFS(nvp); 1834 np->n_vnode = nvp; 1835 np->n_flag = 0; 1836 nfs_lock(nvp); 1837 bcopy((caddr_t)&VTONFS(vp)->n_fh, 1838 (caddr_t)&np->n_fh, NFSX_FH); 1839 insque(np, nfs_hash(&np->n_fh)); 1840 np->n_attrstamp = 0; 1841 np->n_sillyrename = (struct sillyrename *)0; 1842 /* 1843 * Discard unneeded vnode and update actual one 1844 */ 1845 vput(vp); 1846 *vpp = nvp; 1847 } 1848 } 1849 np->n_mtime = mtime.tv_sec; 1850 } 1851 vap = &np->n_vattr; 1852 vap->va_type = type; 1853 vap->va_mode = (mode & 07777); 1854 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1855 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1856 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1857 vap->va_size = fxdr_unsigned(u_long, fp->fa_size); 1858 if ((np->n_flag & NMODIFIED) == 0 || vap->va_size > np->n_size) { 1859 np->n_size = vap->va_size; 1860 vnode_pager_setsize(vp, np->n_size); 1861 } 1862 vap->va_size_rsv = 0; 1863 vap->va_blocksize = fxdr_unsigned(long, fp->fa_blocksize); 1864 vap->va_rdev = (dev_t)rdev; 1865 vap->va_bytes = fxdr_unsigned(long, fp->fa_blocks) * NFS_FABLKSIZE; 1866 vap->va_bytes_rsv = 0; 1867 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1868 vap->va_fileid = fxdr_unsigned(long, fp->fa_fileid); 1869 /* jfw@ksr.com 6/2/93 */ 1870 #if 0 /* bad assumption; Suns make full (and obvious) use of .usec fields */ 1871 vap->va_atime.tv_sec = fxdr_unsigned(long, fp->fa_atime.tv_sec); 1872 vap->va_atime.tv_usec = 0; 1873 vap->va_flags = fxdr_unsigned(u_long, fp->fa_atime.tv_usec); 1874 vap->va_mtime = mtime; 1875 vap->va_ctime.tv_sec = fxdr_unsigned(long, fp->fa_ctime.tv_sec); 1876 vap->va_ctime.tv_usec = 0; 1877 vap->va_gen = fxdr_unsigned(u_long, fp->fa_ctime.tv_usec); 1878 #else 1879 fxdr_time(&fp->fa_atime, &vap->va_atime); 1880 vap->va_mtime = mtime; 1881 fxdr_time(&fp->fa_ctime, &vap->va_ctime); 1882 vap->va_gen = 0; /* can reliably learn nothing about this via NFS. */ 1883 vap->va_flags = 0; /* can reliably learn nothing about this via NFS. */ 1884 #endif 1885 np->n_attrstamp = time.tv_sec; 1886 *dposp = dpos; 1887 *mdp = md; 1888 if (vaper != NULL) { 1889 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1890 if ((np->n_flag & NMODIFIED) && (np->n_size > vap->va_size)) 1891 vaper->va_size = np->n_size; 1892 } 1893 return (0); 1894 } 1895 1896 /* 1897 * Check the time stamp 1898 * If the cache is valid, copy contents to *vap and return 0 1899 * otherwise return an error 1900 */ 1901 nfs_getattrcache(vp, vap) 1902 register struct vnode *vp; 1903 struct vattr *vap; 1904 { 1905 register struct nfsnode *np; 1906 1907 np = VTONFS(vp); 1908 if ((time.tv_sec-np->n_attrstamp) < NFS_ATTRTIMEO) { 1909 nfsstats.attrcache_hits++; 1910 bcopy((caddr_t)&np->n_vattr,(caddr_t)vap,sizeof(struct vattr)); 1911 if ((np->n_flag & NMODIFIED) == 0) { 1912 np->n_size = vap->va_size; 1913 vnode_pager_setsize(vp, np->n_size); 1914 } else if (np->n_size > vap->va_size) 1915 vap->va_size = np->n_size; 1916 return (0); 1917 } else { 1918 nfsstats.attrcache_misses++; 1919 return (ENOENT); 1920 } 1921 } 1922