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 are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * @(#)nfs_vnops.c 7.5 (Berkeley) 08/30/89 21 */ 22 23 /* 24 * vnode op calls for sun nfs version 2 25 */ 26 27 #include "machine/pte.h" 28 #include "machine/mtpr.h" 29 #include "strings.h" 30 #include "param.h" 31 #include "user.h" 32 #include "proc.h" 33 #include "mount.h" 34 #include "buf.h" 35 #include "vm.h" 36 #include "../ufs/dir.h" 37 #include "malloc.h" 38 #include "mbuf.h" 39 #include "uio.h" 40 #include "ucred.h" 41 #include "namei.h" 42 #include "errno.h" 43 #include "file.h" 44 #include "conf.h" 45 #include "vnode.h" 46 #include "../ufs/inode.h" 47 #include "map.h" 48 #include "nfsv2.h" 49 #include "nfs.h" 50 #include "nfsnode.h" 51 #include "nfsmount.h" 52 #include "xdr_subs.h" 53 #include "nfsm_subs.h" 54 #include "nfsiom.h" 55 56 /* Defs */ 57 #define TRUE 1 58 #define FALSE 0 59 60 /* Global vars */ 61 int nfs_lookup(), 62 nfs_create(), 63 nfs_open(), 64 nfs_close(), 65 nfs_access(), 66 nfs_getattr(), 67 nfs_setattr(), 68 nfs_read(), 69 nfs_write(), 70 vfs_noop(), 71 vfs_nullop(), 72 nfs_remove(), 73 nfs_link(), 74 nfs_rename(), 75 nfs_mkdir(), 76 nfs_rmdir(), 77 nfs_symlink(), 78 nfs_readdir(), 79 nfs_readlink(), 80 nfs_abortop(), 81 nfs_lock(), 82 nfs_unlock(), 83 nfs_bmap(), 84 nfs_strategy(), 85 nfs_fsync(), 86 nfs_inactive(); 87 88 struct vnodeops nfsv2_vnodeops = { 89 nfs_lookup, 90 nfs_create, 91 vfs_noop, 92 nfs_open, 93 nfs_close, 94 nfs_access, 95 nfs_getattr, 96 nfs_setattr, 97 nfs_read, 98 nfs_write, 99 vfs_noop, 100 vfs_noop, 101 vfs_noop, 102 nfs_fsync, 103 vfs_noop, 104 nfs_remove, 105 nfs_link, 106 nfs_rename, 107 nfs_mkdir, 108 nfs_rmdir, 109 nfs_symlink, 110 nfs_readdir, 111 nfs_readlink, 112 nfs_abortop, 113 nfs_inactive, 114 nfs_lock, 115 nfs_unlock, 116 nfs_bmap, 117 nfs_strategy, 118 }; 119 120 /* Special device vnode ops */ 121 int blk_open(), 122 blk_read(), 123 blk_write(), 124 blk_ioctl(), 125 blk_select(), 126 ufs_bmap(), 127 blk_strategy(); 128 129 struct vnodeops nfsv2chr_vnodeops = { 130 vfs_noop, 131 vfs_noop, 132 vfs_noop, 133 blk_open, 134 nfs_close, 135 nfs_access, 136 nfs_getattr, 137 nfs_setattr, 138 blk_read, 139 blk_write, 140 blk_ioctl, 141 blk_select, 142 vfs_noop, 143 vfs_nullop, 144 vfs_noop, 145 nfs_remove, 146 nfs_link, 147 nfs_rename, 148 vfs_noop, 149 vfs_noop, 150 nfs_symlink, 151 vfs_noop, 152 vfs_noop, 153 nfs_abortop, 154 nfs_inactive, 155 nfs_lock, 156 nfs_unlock, 157 ufs_bmap, 158 blk_strategy, 159 }; 160 161 extern u_long nfs_procids[NFS_NPROCS]; 162 extern u_long nfs_prog, nfs_vers; 163 extern char nfsiobuf[MAXPHYS+NBPG]; 164 struct map nfsmap[NFS_MSIZ]; 165 enum vtype v_type[NFLNK+1]; 166 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 167 int nfs_iodwant = 0; 168 static int nfsmap_want = 0; 169 170 /* 171 * nfs null call from vfs. 172 */ 173 nfs_null(vp, cred) 174 struct vnode *vp; 175 struct ucred *cred; 176 { 177 nfsm_vars; 178 179 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 180 nfsm_request(vp); 181 nfsm_reqdone; 182 return (error); 183 } 184 185 /* 186 * nfs access vnode op. 187 * Essentially just get vattr and then imitate iaccess() 188 */ 189 nfs_access(vp, mode, cred) 190 struct vnode *vp; 191 int mode; 192 register struct ucred *cred; 193 { 194 register struct vattr *vap; 195 register gid_t *gp; 196 struct vattr vattr; 197 register int i; 198 int error; 199 200 /* 201 * If you're the super-user, 202 * you always get access. 203 */ 204 if (cred->cr_uid == 0) 205 return (0); 206 vap = &vattr; 207 if (error = nfs_getattr(vp, vap, cred)) 208 return (error); 209 /* 210 * Access check is based on only one of owner, group, public. 211 * If not owner, then check group. If not a member of the 212 * group, then check public access. 213 */ 214 if (cred->cr_uid != vap->va_uid) { 215 mode >>= 3; 216 gp = cred->cr_groups; 217 for (i = 0; i < cred->cr_ngroups; i++, gp++) 218 if (vap->va_gid == *gp) 219 goto found; 220 mode >>= 3; 221 found: 222 ; 223 } 224 if ((vap->va_mode & mode) != 0) 225 return (0); 226 return (EACCES); 227 } 228 229 /* 230 * nfs open vnode op 231 * Just check to see if the type is ok 232 */ 233 nfs_open(vp, mode, cred) 234 struct vnode *vp; 235 int mode; 236 struct ucred *cred; 237 { 238 register enum vtype vtyp; 239 240 vtyp = vp->v_type; 241 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 242 return (0); 243 else 244 return (EACCES); 245 } 246 247 /* 248 * nfs close vnode op 249 * For reg files, invalidate any buffer cache entries. 250 * For VCHR, do the device close 251 */ 252 nfs_close(vp, fflags, cred) 253 register struct vnode *vp; 254 int fflags; 255 struct ucred *cred; 256 { 257 struct nfsnode *np = VTONFS(vp); 258 dev_t dev; 259 int error; 260 261 nfs_lock(vp); 262 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 263 np->n_flag &= ~NMODIFIED; 264 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 265 } 266 nfs_unlock(vp); 267 if (vp->v_type != VCHR || vp->v_count > 1) 268 return (0); 269 dev = vp->v_rdev; 270 /* XXX what is this doing below the vnode op call */ 271 if (setjmp(&u.u_qsave)) { 272 /* 273 * If device close routine is interrupted, 274 * must return so closef can clean up. 275 */ 276 error = EINTR; 277 } else 278 error = (*cdevsw[major(dev)].d_close)(dev, fflags, IFCHR); 279 /* 280 * Most device close routines don't return errors, 281 * and dup2() doesn't work right on error. 282 */ 283 error = 0; /* XXX */ 284 return (error); 285 } 286 287 /* 288 * nfs getattr call from vfs. 289 */ 290 nfs_getattr(vp, vap, cred) 291 struct vnode *vp; 292 register struct vattr *vap; 293 struct ucred *cred; 294 { 295 nfsm_vars; 296 297 /* First look in the cache.. */ 298 if (nfs_getattrcache(vp, vap) == 0) 299 return (0); 300 nfsstats.rpccnt[NFSPROC_GETATTR]++; 301 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 302 nfsm_fhtom(vp); 303 nfsm_request(vp); 304 nfsm_loadattr(vp, vap); 305 nfsm_reqdone; 306 return (error); 307 } 308 309 /* 310 * nfs setattr call. 311 */ 312 nfs_setattr(vp, vap, cred) 313 struct vnode *vp; 314 register struct vattr *vap; 315 struct ucred *cred; 316 { 317 register struct nfsv2_sattr *sp; 318 nfsm_vars; 319 320 nfsstats.rpccnt[NFSPROC_SETATTR]++; 321 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 322 nfsm_fhtom(vp); 323 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 324 if (vap->va_mode == 0xffff) 325 sp->sa_mode = VNOVAL; 326 else 327 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 328 if (vap->va_uid == 0xffff) 329 sp->sa_uid = VNOVAL; 330 else 331 sp->sa_uid = txdr_unsigned(vap->va_uid); 332 if (vap->va_gid == 0xffff) 333 sp->sa_gid = VNOVAL; 334 else 335 sp->sa_gid = txdr_unsigned(vap->va_gid); 336 sp->sa_size = txdr_unsigned(vap->va_size); 337 if (vap->va_size != VNOVAL) 338 VTONFS(vp)->n_size = vap->va_size; 339 txdr_time(&vap->va_atime, &sp->sa_atime); 340 txdr_time(&vap->va_mtime, &sp->sa_mtime); 341 nfsm_request(vp); 342 nfsm_loadattr(vp, (struct vattr *)0); 343 /* should we fill in any vap fields ?? */ 344 nfsm_reqdone; 345 return (error); 346 } 347 348 /* 349 * nfs lookup call, one step at a time... 350 * First look in cache 351 * If not found, unlock the directory nfsnode and do the rpc 352 */ 353 nfs_lookup(vp, ndp) 354 register struct vnode *vp; 355 register struct nameidata *ndp; 356 { 357 register struct vnode *vdp; 358 nfsm_vars; 359 struct vnode *newvp; 360 long len; 361 nfsv2fh_t *fhp; 362 struct nfsnode *np; 363 int lockparent, wantparent, flag; 364 dev_t rdev; 365 366 ndp->ni_dvp = vp; 367 ndp->ni_vp = NULL; 368 if (vp->v_type != VDIR) 369 return (ENOTDIR); 370 lockparent = ndp->ni_nameiop & LOCKPARENT; 371 flag = ndp->ni_nameiop & OPFLAG; 372 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 373 #ifndef notyet 374 if (error = cache_lookup(ndp)) { 375 struct vattr vattr; 376 int vpid; 377 378 if (ndp->ni_vp == ndp->ni_rdir && ndp->ni_isdotdot) 379 vdp = vp; 380 else 381 vdp = ndp->ni_vp; 382 vpid = vdp->v_id; 383 /* 384 * See the comment starting `Step through' in ufs/ufs_lookup.c 385 * for an explanation of the locking protocol 386 */ 387 if (vp == vdp) { 388 VREF(vdp); 389 } else if (ndp->ni_isdotdot) { 390 nfs_unlock(vp); 391 nfs_ngrab(VTONFS(vdp)); 392 } else { 393 nfs_ngrab(VTONFS(vdp)); 394 nfs_unlock(vp); 395 } 396 if (vpid == vdp->v_id && 397 !nfs_getattr(vp, &vattr, ndp->ni_cred)) { 398 nfsstats.lookupcache_hits++; 399 return (0); 400 } 401 nfs_nput(vdp); 402 nfs_lock(vp); 403 ndp->ni_vp = (struct vnode *)0; 404 } 405 nfsstats.lookupcache_misses++; 406 #endif 407 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 408 len = ndp->ni_namelen; 409 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 410 nfsm_fhtom(vp); 411 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 412 nfsm_request(vp); 413 nfsmout: 414 if (error) { 415 if ((flag == CREATE || flag == RENAME) && 416 *ndp->ni_next == 0) { 417 if (!lockparent) 418 nfs_unlock(vp); 419 } 420 return (ENOENT); 421 } 422 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 423 424 /* 425 * Handle DELETE and RENAME cases... 426 */ 427 if (flag == DELETE && *ndp->ni_next == 0) { 428 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 429 VREF(vp); 430 newvp = vp; 431 np = VTONFS(vp); 432 } else { 433 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 434 m_freem(mrep); 435 return (error); 436 } 437 newvp = NFSTOV(np); 438 } 439 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 440 if (newvp != vp) 441 nfs_nput(newvp); 442 else 443 vrele(vp); 444 m_freem(mrep); 445 return (error); 446 } 447 if (newvp->v_type == VNON) { 448 newvp->v_type = np->n_vattr.va_type; 449 np->n_mtime = np->n_vattr.va_mtime.tv_sec; 450 } 451 ndp->ni_vp = newvp; 452 if (!lockparent) 453 nfs_unlock(vp); 454 m_freem(mrep); 455 return (0); 456 } 457 458 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 459 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 460 m_freem(mrep); 461 return (EISDIR); 462 } 463 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 464 m_freem(mrep); 465 return (error); 466 } 467 newvp = NFSTOV(np); 468 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 469 nfs_nput(newvp); 470 m_freem(mrep); 471 return (error); 472 } 473 ndp->ni_vp = newvp; 474 if (!lockparent) 475 nfs_unlock(vp); 476 return (0); 477 } 478 479 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 480 VREF(vp); 481 newvp = vp; 482 np = VTONFS(vp); 483 } else if (ndp->ni_isdotdot) { 484 nfs_unlock(vp); 485 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 486 nfs_lock(vp); 487 m_freem(mrep); 488 return (error); 489 } 490 nfs_lock(vp); 491 newvp = NFSTOV(np); 492 } else { 493 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 494 m_freem(mrep); 495 return (error); 496 } 497 newvp = NFSTOV(np); 498 } 499 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 500 if (newvp != vp) 501 nfs_nput(newvp); 502 else 503 vrele(vp); 504 m_freem(mrep); 505 return (error); 506 } 507 m_freem(mrep); 508 if (newvp->v_type == VNON) { 509 newvp->v_type = np->n_vattr.va_type; 510 np->n_mtime = np->n_vattr.va_mtime.tv_sec; 511 } 512 513 /* 514 * Handling special files... 515 * For VCHR, use the nfs_node, but with the nfsv2chr_vnodeops 516 * that are a mix of nfs and blk vnode ops. 517 * Also, returns right away to avoid loading the name cache 518 */ 519 if (newvp->v_type == VCHR) { 520 newvp->v_rdev = np->n_vattr.va_rdev; 521 newvp->v_op = &nfsv2chr_vnodeops; 522 } 523 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 524 nfs_unlock(vp); 525 ndp->ni_vp = newvp; 526 #ifndef notyet 527 if (error == 0 && ndp->ni_makeentry) 528 cache_enter(ndp); 529 #endif 530 return (error); 531 } 532 533 /* 534 * nfs readlink call 535 */ 536 nfs_readlink(vp, uiop, cred) 537 struct vnode *vp; 538 struct uio *uiop; 539 struct ucred *cred; 540 { 541 nfsm_vars; 542 long len; 543 544 nfsstats.rpccnt[NFSPROC_READLINK]++; 545 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 546 nfsm_fhtom(vp); 547 nfsm_request(vp); 548 nfsm_strsiz(len, NFS_MAXPATHLEN); 549 nfsm_mtouio(uiop, len); 550 nfsm_reqdone; 551 return (error); 552 } 553 554 /* 555 * nfs read call 556 */ 557 nfs_readrpc(vp, uiop, offp, cred) 558 struct vnode *vp; 559 struct uio *uiop; 560 off_t *offp; 561 struct ucred *cred; 562 { 563 nfsm_vars; 564 struct nfsmount *nmp; 565 long len, retlen, tsiz; 566 567 nmp = vfs_to_nfs(vp->v_mount); 568 tsiz = uiop->uio_resid; 569 while (tsiz > 0) { 570 nfsstats.rpccnt[NFSPROC_READ]++; 571 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 572 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 573 nfsm_fhtom(vp); 574 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 575 *p++ = txdr_unsigned(*offp); 576 *p++ = txdr_unsigned(len); 577 *p = 0; 578 nfsm_request(vp); 579 nfsm_loadattr(vp, (struct vattr *)0); 580 nfsm_strsiz(retlen, nmp->nm_rsize); 581 nfsm_mtouio(uiop, retlen); 582 m_freem(mrep); 583 *offp += retlen; 584 if (retlen < len) 585 tsiz = 0; 586 else 587 tsiz -= len; 588 } 589 nfsmout: 590 return (error); 591 } 592 593 /* 594 * nfs write call 595 */ 596 nfs_writerpc(vp, uiop, offp, cred) 597 struct vnode *vp; 598 struct uio *uiop; 599 off_t *offp; 600 struct ucred *cred; 601 { 602 nfsm_vars; 603 struct nfsmount *nmp; 604 long len, tsiz; 605 606 nmp = vfs_to_nfs(vp->v_mount); 607 tsiz = uiop->uio_resid; 608 while (tsiz > 0) { 609 nfsstats.rpccnt[NFSPROC_WRITE]++; 610 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 611 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 612 NFSX_FH+NFSX_UNSIGNED*4); 613 nfsm_fhtom(vp); 614 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 615 *(p+1) = txdr_unsigned(*offp); 616 *(p+3) = txdr_unsigned(len); 617 nfsm_uiotom(uiop, len); 618 nfsm_request(vp); 619 nfsm_loadattr(vp, (struct vattr *)0); 620 m_freem(mrep); 621 tsiz -= len; 622 *offp += len; 623 } 624 nfsmout: 625 return (error); 626 } 627 628 /* 629 * nfs file create call 630 */ 631 nfs_create(ndp, vap) 632 register struct nameidata *ndp; 633 register struct vattr *vap; 634 { 635 register struct nfsv2_sattr *sp; 636 nfsm_vars; 637 638 nfsstats.rpccnt[NFSPROC_CREATE]++; 639 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 640 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 641 nfsm_fhtom(ndp->ni_dvp); 642 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 643 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 644 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 645 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 646 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 647 sp->sa_size = txdr_unsigned(0); 648 /* or should these be VNOVAL ?? */ 649 txdr_time(&vap->va_atime, &sp->sa_atime); 650 txdr_time(&vap->va_mtime, &sp->sa_mtime); 651 nfsm_request(ndp->ni_dvp); 652 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 653 nfsm_reqdone; 654 nfs_nput(ndp->ni_dvp); 655 return (error); 656 } 657 658 /* 659 * nfs file remove call 660 */ 661 nfs_remove(ndp) 662 register struct nameidata *ndp; 663 { 664 nfsm_vars; 665 666 if (ndp->ni_vp->v_count > 1) 667 error = nfs_sillyrename(ndp, REMOVE); 668 else { 669 nfsstats.rpccnt[NFSPROC_REMOVE]++; 670 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 671 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 672 nfsm_fhtom(ndp->ni_dvp); 673 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 674 nfsm_request(ndp->ni_dvp); 675 nfsm_reqdone; 676 } 677 if (ndp->ni_dvp == ndp->ni_vp) 678 vrele(ndp->ni_vp); 679 else 680 nfs_nput(ndp->ni_vp); 681 nfs_nput(ndp->ni_dvp); 682 return (error); 683 } 684 685 /* 686 * nfs file remove rpc called from nfs_inactive 687 */ 688 nfs_removeit(ndp) 689 register struct nameidata *ndp; 690 { 691 nfsm_vars; 692 693 printf("in removeit\n"); 694 nfsstats.rpccnt[NFSPROC_REMOVE]++; 695 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 696 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 697 nfsm_fhtom(ndp->ni_dvp); 698 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 699 nfsm_request(ndp->ni_dvp); 700 nfsm_reqdone; 701 printf("eo removeit err=%d\n",error); 702 return (error); 703 } 704 705 /* 706 * nfs file rename call 707 */ 708 nfs_rename(sndp, tndp) 709 register struct nameidata *sndp, *tndp; 710 { 711 nfsm_vars; 712 713 nfsstats.rpccnt[NFSPROC_RENAME]++; 714 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 715 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 716 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 717 nfsm_fhtom(sndp->ni_dvp); 718 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 719 nfsm_fhtom(tndp->ni_dvp); 720 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 721 nfsm_request(sndp->ni_dvp); 722 nfsm_reqdone; 723 #ifndef notyet 724 if (sndp->ni_vp->v_type == VDIR) { 725 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 726 cache_purge(tndp->ni_dvp); 727 cache_purge(sndp->ni_dvp); 728 } 729 #endif 730 nfs_abortop(sndp); 731 nfs_abortop(tndp); 732 return (error); 733 } 734 735 /* 736 * nfs file rename rpc called from above 737 */ 738 nfs_renameit(sndp, tndp) 739 register struct nameidata *sndp, *tndp; 740 { 741 nfsm_vars; 742 743 nfsstats.rpccnt[NFSPROC_RENAME]++; 744 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 745 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 746 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 747 nfsm_fhtom(sndp->ni_dvp); 748 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 749 nfsm_fhtom(tndp->ni_dvp); 750 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 751 nfsm_request(sndp->ni_dvp); 752 nfsm_reqdone; 753 return (error); 754 } 755 756 /* 757 * nfs hard link create call 758 */ 759 nfs_link(vp, ndp) 760 struct vnode *vp; 761 register struct nameidata *ndp; 762 { 763 nfsm_vars; 764 765 if (ndp->ni_dvp != vp) 766 nfs_lock(vp); 767 nfsstats.rpccnt[NFSPROC_LINK]++; 768 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 769 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 770 nfsm_fhtom(vp); 771 nfsm_fhtom(ndp->ni_dvp); 772 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 773 nfsm_request(vp); 774 nfsm_reqdone; 775 if (ndp->ni_dvp != vp) 776 nfs_unlock(vp); 777 nfs_nput(ndp->ni_dvp); 778 return (error); 779 } 780 781 /* 782 * nfs symbolic link create call 783 */ 784 nfs_symlink(ndp, vap, nm) 785 struct nameidata *ndp; 786 struct vattr *vap; 787 char *nm; /* is this the path ?? */ 788 { 789 register struct nfsv2_sattr *sp; 790 nfsm_vars; 791 792 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 793 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 794 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 795 nfsm_fhtom(ndp->ni_dvp); 796 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 797 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 798 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 799 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 800 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 801 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 802 sp->sa_size = txdr_unsigned(VNOVAL); 803 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 804 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 805 nfsm_request(ndp->ni_dvp); 806 nfsm_reqdone; 807 nfs_nput(ndp->ni_dvp); 808 return (error); 809 } 810 811 /* 812 * nfs make dir call 813 */ 814 nfs_mkdir(ndp, vap) 815 struct nameidata *ndp; 816 struct vattr *vap; 817 { 818 register struct nfsv2_sattr *sp; 819 nfsm_vars; 820 821 nfsstats.rpccnt[NFSPROC_MKDIR]++; 822 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 823 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 824 nfsm_fhtom(ndp->ni_dvp); 825 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 826 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 827 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 828 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 829 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 830 sp->sa_size = txdr_unsigned(VNOVAL); 831 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 832 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 833 nfsm_request(ndp->ni_dvp); 834 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 835 nfsm_reqdone; 836 nfs_nput(ndp->ni_dvp); 837 return (error); 838 } 839 840 /* 841 * nfs remove directory call 842 */ 843 nfs_rmdir(ndp) 844 register struct nameidata *ndp; 845 { 846 nfsm_vars; 847 848 if (ndp->ni_dvp == ndp->ni_vp) { 849 vrele(ndp->ni_dvp); 850 nfs_nput(ndp->ni_dvp); 851 return (EINVAL); 852 } 853 nfsstats.rpccnt[NFSPROC_RMDIR]++; 854 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 855 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 856 nfsm_fhtom(ndp->ni_dvp); 857 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 858 nfsm_request(ndp->ni_dvp); 859 nfsm_reqdone; 860 #ifndef notyet 861 cache_purge(ndp->ni_dvp); 862 cache_purge(ndp->ni_vp); 863 #endif 864 nfs_nput(ndp->ni_vp); 865 nfs_nput(ndp->ni_dvp); 866 return (error); 867 } 868 869 /* 870 * nfs readdir call 871 * Although cookie is defined as opaque, I translate it to/from net byte 872 * order so that it looks more sensible. This appears consistent with the 873 * Ultrix implementation of NFS. 874 */ 875 nfs_readdir(vp, uiop, offp, cred) 876 struct vnode *vp; 877 struct uio *uiop; 878 off_t *offp; 879 struct ucred *cred; 880 { 881 register long len; 882 register struct direct *dp; 883 nfsm_vars; 884 struct mbuf *md2; 885 caddr_t dpos2; 886 int siz; 887 int more_dirs, eofflg; 888 off_t off, savoff; 889 struct direct *savdp; 890 891 nfs_lock(vp); 892 nfsstats.rpccnt[NFSPROC_READDIR]++; 893 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 894 nfsm_fhtom(vp); 895 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 896 off = *offp; 897 *p++ = txdr_unsigned(off); 898 *p = txdr_unsigned(uiop->uio_resid); 899 nfsm_request(vp); 900 siz = 0; 901 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 902 more_dirs = fxdr_unsigned(int, *p); 903 904 /* Save the position so that we can do nfsm_mtouio() later */ 905 dpos2 = dpos; 906 md2 = md; 907 908 /* loop thru the dir entries, doctoring them to 4bsd form */ 909 while (more_dirs && siz < uiop->uio_resid) { 910 savoff = off; /* Hold onto offset and dp */ 911 savdp = dp; 912 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 913 dp = (struct direct *)p; 914 dp->d_ino = fxdr_unsigned(u_long, *p++); 915 len = fxdr_unsigned(int, *p); 916 if (len <= 0 || len > NFS_MAXNAMLEN) { 917 error = EBADRPC; 918 m_freem(mrep); 919 goto nfsmout; 920 } 921 dp->d_namlen = (u_short)len; 922 len = nfsm_rndup(len); 923 nfsm_adv(len); 924 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 925 off = fxdr_unsigned(off_t, *p); 926 *p++ = 0; /* Ensures null termination of name */ 927 more_dirs = fxdr_unsigned(int, *p); 928 dp->d_reclen = len+4*NFSX_UNSIGNED; 929 siz += dp->d_reclen; 930 } 931 /* 932 * If at end of rpc data, get the eof boolean 933 */ 934 if (!more_dirs) { 935 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 936 eofflg = fxdr_unsigned(long, *p); 937 } 938 /* 939 * If there is too much to fit in the data buffer, use savoff and 940 * savdp to trim off the last record. 941 * --> we are not at eof 942 */ 943 if (siz > uiop->uio_resid) { 944 eofflg = FALSE; 945 off = savoff; 946 siz -= dp->d_reclen; 947 dp = savdp; 948 } 949 if (siz > 0) { 950 #ifdef notdef 951 if (!eofflg) 952 dp->d_reclen += (uiop->uio_resid-siz); 953 #endif 954 md = md2; 955 dpos = dpos2; 956 nfsm_mtouio(uiop, siz); 957 #ifdef notdef 958 if (!eofflg) 959 uiop->uio_resid = 0; 960 #endif 961 *offp = off; 962 } 963 nfsm_reqdone; 964 nfs_unlock(vp); 965 return (error); 966 } 967 968 /* 969 * nfs statfs call 970 * (Actually a vfsop, not a vnode op) 971 */ 972 nfs_statfs(mp, sbp) 973 struct mount *mp; 974 register struct statfs *sbp; 975 { 976 register struct nfsv2_statfs *sfp; 977 nfsm_vars; 978 struct nfsmount *nmp; 979 struct ucred *cred; 980 struct nfsnode *np; 981 struct vnode *vp; 982 983 nmp = vfs_to_nfs(mp); 984 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 985 return (error); 986 vp = NFSTOV(np); 987 nfsstats.rpccnt[NFSPROC_STATFS]++; 988 cred = crget(); 989 cred->cr_ngroups = 1; 990 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 991 nfsm_fhtom(vp); 992 nfsm_request(vp); 993 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 994 sbp->f_type = MOUNT_NFS; 995 sbp->f_flags = nmp->nm_flag; 996 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 997 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 998 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 999 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1000 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1001 sbp->f_files = 0; 1002 sbp->f_ffree = 0; 1003 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1004 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1005 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1006 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1007 nfsm_reqdone; 1008 nfs_nput(vp); 1009 crfree(cred); 1010 return (error); 1011 } 1012 1013 #define HEXTOASC(x) "0123456789abcdef"[x] 1014 1015 /* 1016 * Silly rename. To make the NFS filesystem that is stateless look a little 1017 * more like the "ufs" a remove of an active vnode is translated to a rename 1018 * to a funny looking filename that is removed by nfs_inactive on the 1019 * nfsnode. There is the potential for another process on a different client 1020 * to create the same funny name between the nfs_lookitup() fails and the 1021 * nfs_rename() completes, but... 1022 */ 1023 nfs_sillyrename(ndp, flag) 1024 struct nameidata *ndp; 1025 int flag; 1026 { 1027 register struct nfsnode *np; 1028 register struct sillyrename *sp; 1029 register struct nameidata *tndp; 1030 int error; 1031 short pid; 1032 1033 np = VTONFS(ndp->ni_dvp); 1034 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1035 M_TEMP, M_WAITOK); 1036 sp->s_flag = flag; 1037 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1038 np = VTONFS(ndp->ni_vp); 1039 tndp = &sp->s_namei; 1040 tndp->ni_cred = crdup(ndp->ni_cred); 1041 1042 /* Fudge together a funny name */ 1043 pid = u.u_procp->p_pid; 1044 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1045 tndp->ni_dent.d_namlen = 12; 1046 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1047 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1048 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1049 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1050 1051 /* Try lookitups until we get one that isn't there */ 1052 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1053 tndp->ni_dent.d_name[4]++; 1054 if (tndp->ni_dent.d_name[4] > 'z') { 1055 error = EINVAL; 1056 goto bad; 1057 } 1058 } 1059 if (error = nfs_renameit(ndp, tndp)) 1060 goto bad; 1061 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1062 np->n_sillyrename = sp; 1063 return (0); 1064 bad: 1065 crfree(tndp->ni_cred); 1066 free((caddr_t)sp, M_TEMP); 1067 return (error); 1068 } 1069 1070 /* 1071 * Look up a file name for silly rename stuff. 1072 * Just like nfs_lookup() except that it doesn't load returned values 1073 * into the nfsnode table. 1074 * If fhp != NULL it copies the returned file handle out 1075 */ 1076 nfs_lookitup(vp, ndp, fhp) 1077 register struct vnode *vp; 1078 register struct nameidata *ndp; 1079 nfsv2fh_t *fhp; 1080 { 1081 nfsm_vars; 1082 long len; 1083 1084 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1085 ndp->ni_dvp = vp; 1086 ndp->ni_vp = NULL; 1087 len = ndp->ni_dent.d_namlen; 1088 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1089 nfsm_fhtom(vp); 1090 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1091 nfsm_request(vp); 1092 if (fhp != NULL) { 1093 nfsm_disect(cp, caddr_t, NFSX_FH); 1094 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1095 } 1096 nfsm_reqdone; 1097 return (error); 1098 } 1099 1100 /* 1101 * Kludge City.. 1102 * - make nfs_bmap() essentially a no-op that does no translation 1103 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1104 * after mapping the physical addresses into Kernel Virtual space in the 1105 * nfsiobuf area. 1106 * (Maybe I could use the process's page mapping, but I was concerned that 1107 * Kernel Write might not be enabled and also figured copyout() would do 1108 * a lot more work than bcopy() and also it currently happens in the 1109 * context of the swapper process (2). 1110 */ 1111 nfs_bmap(vp, bn, vpp, bnp) 1112 struct vnode *vp; 1113 daddr_t bn; 1114 struct vnode **vpp; 1115 daddr_t *bnp; 1116 { 1117 if (vpp != NULL) 1118 *vpp = vp; 1119 if (bnp != NULL) 1120 *bnp = bn * btodb(vp->v_mount->m_bsize); 1121 return (0); 1122 } 1123 1124 /* 1125 * Strategy routine for phys. i/o 1126 * If the biod's are running, queue a request 1127 * otherwise just call nfs_doio() to get it done 1128 */ 1129 nfs_strategy(bp) 1130 register struct buf *bp; 1131 { 1132 register struct buf *dp; 1133 struct proc *rp; 1134 int error = 0; 1135 1136 /* 1137 * If an i/o daemon is waiting 1138 * queue the request, wake it up and wait for completion 1139 * otherwise just do it ourselves 1140 */ 1141 if (nfs_iodwant) { 1142 dp = &nfs_bqueue; 1143 if (dp->b_actf == NULL) { 1144 dp->b_actl = bp; 1145 bp->b_actf = dp; 1146 } else { 1147 dp->b_actf->b_actl = bp; 1148 bp->b_actf = dp->b_actf; 1149 } 1150 dp->b_actf = bp; 1151 bp->b_actl = dp; 1152 nfs_iodwant = 0; 1153 wakeup((caddr_t)&nfs_iodwant); 1154 } else 1155 error = nfs_doio(bp); 1156 return (error); 1157 } 1158 1159 /* 1160 * Fun and games with i/o 1161 * Essentially play ubasetup() and disk interrupt service routine by 1162 * mapping the data buffer into kernel virtual space and doing the 1163 * nfs read or write rpc's from it. 1164 * If the biod's are not running, this is just called from nfs_strategy(), 1165 * otherwise it is called by the biod's to do what would normally be 1166 * partially disk interrupt driven. 1167 */ 1168 nfs_doio(bp) 1169 register struct buf *bp; 1170 { 1171 register struct pte *pte, *ppte; 1172 register caddr_t vaddr; 1173 register struct uio *uiop; 1174 register struct vnode *vp; 1175 struct ucred *cr; 1176 int npf, npf2; 1177 int reg; 1178 caddr_t vbase; 1179 caddr_t addr; 1180 unsigned v; 1181 struct proc *rp; 1182 int o, error; 1183 int bcnt; 1184 off_t off; 1185 struct uio uio; 1186 struct iovec io; 1187 1188 vp = bp->b_vp; 1189 uiop = &uio; 1190 uiop->uio_iov = &io; 1191 uiop->uio_iovcnt = 1; 1192 uiop->uio_segflg = UIO_SYSSPACE; 1193 if (bp->b_flags & B_READ) { 1194 io.iov_len = uiop->uio_resid = bp->b_bcount; 1195 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1196 addr = bp->b_un.b_addr; 1197 bcnt = bp->b_bcount; 1198 } else { 1199 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1200 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1201 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1202 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1203 } 1204 /* 1205 * For phys i/o, map the b_addr into kernel virtual space using 1206 * the Nfsiomap pte's 1207 * Also, add a temporary b_rcred for reading using the process's uid 1208 * and a guess at a group 1209 */ 1210 if (bp->b_flags & B_PHYS) { 1211 bp->b_rcred = cr = crget(); 1212 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1213 cr->cr_uid = rp->p_uid; 1214 cr->cr_gid = 0; /* Anything ?? */ 1215 cr->cr_ngroups = 1; 1216 o = (int)addr & PGOFSET; 1217 npf2 = npf = btoc(bcnt + o); 1218 /* 1219 * Get some mapping page table entries 1220 */ 1221 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1222 nfsmap_want++; 1223 sleep((caddr_t)&nfsmap_want, PZERO-1); 1224 } 1225 reg--; 1226 /* I know it is always the else, but that may change someday */ 1227 if ((bp->b_flags & B_PHYS) == 0) 1228 pte = kvtopte(bp->b_un.b_addr); 1229 else if (bp->b_flags & B_PAGET) 1230 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1231 else { 1232 v = btop(bp->b_un.b_addr); 1233 if (bp->b_flags & B_UAREA) 1234 pte = &rp->p_addr[v]; 1235 else 1236 pte = vtopte(rp, v); 1237 } 1238 /* 1239 * Play vmaccess() but with the Nfsiomap page table 1240 */ 1241 ppte = &Nfsiomap[reg]; 1242 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1243 while (npf != 0) { 1244 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1245 #if defined(tahoe) 1246 mtpr(P1DC, vaddr); 1247 #endif 1248 ppte++; 1249 pte++; 1250 vaddr += NBPG; 1251 --npf; 1252 } 1253 io.iov_base = vbase+o; 1254 } else { 1255 io.iov_base = addr; 1256 } 1257 if (bp->b_flags & B_READ) { 1258 uiop->uio_rw = UIO_READ; 1259 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1260 } else { 1261 uiop->uio_rw = UIO_WRITE; 1262 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1263 bp->b_dirtyoff = bp->b_dirtyend = 0; 1264 } 1265 if (error) 1266 bp->b_flags |= B_ERROR; 1267 bp->b_resid = uiop->uio_resid; 1268 /* 1269 * Release pte's used by physical i/o 1270 */ 1271 if (bp->b_flags & B_PHYS) { 1272 crfree(cr); 1273 rmfree(nfsmap, (long)npf2, (long)++reg); 1274 if (nfsmap_want) { 1275 nfsmap_want = 0; 1276 wakeup((caddr_t)&nfsmap_want); 1277 } 1278 } 1279 biodone(bp); 1280 return (error); 1281 } 1282 1283 /* 1284 * Flush all the blocks associated with a vnode. 1285 * Walk through the buffer pool and push any dirty pages 1286 * associated with the vnode. 1287 */ 1288 nfs_fsync(vp, fflags, cred) 1289 register struct vnode *vp; 1290 int fflags; 1291 struct ucred *cred; 1292 { 1293 register struct nfsnode *np = VTONFS(vp); 1294 int error; 1295 1296 nfs_lock(vp); 1297 if (np->n_flag & NMODIFIED) { 1298 np->n_flag &= ~NMODIFIED; 1299 error = nfs_blkflush(vp, (daddr_t)0, VTONFS(vp)->n_size, FALSE); 1300 } 1301 nfs_unlock(vp); 1302 return (error); 1303 } 1304