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 7.12 (Berkeley) 10/31/89 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_mknod(), 64 nfs_open(), 65 nfs_close(), 66 nfs_access(), 67 nfs_getattr(), 68 nfs_setattr(), 69 nfs_read(), 70 nfs_write(), 71 vfs_noop(), 72 vfs_nullop(), 73 nfs_remove(), 74 nfs_link(), 75 nfs_rename(), 76 nfs_mkdir(), 77 nfs_rmdir(), 78 nfs_symlink(), 79 nfs_readdir(), 80 nfs_readlink(), 81 nfs_abortop(), 82 nfs_lock(), 83 nfs_unlock(), 84 nfs_bmap(), 85 nfs_strategy(), 86 nfs_fsync(), 87 nfs_inactive(), 88 nfs_reclaim(); 89 90 struct vnodeops nfsv2_vnodeops = { 91 nfs_lookup, 92 nfs_create, 93 nfs_mknod, 94 nfs_open, 95 nfs_close, 96 nfs_access, 97 nfs_getattr, 98 nfs_setattr, 99 nfs_read, 100 nfs_write, 101 vfs_noop, 102 vfs_noop, 103 vfs_noop, 104 nfs_fsync, 105 vfs_nullop, 106 nfs_remove, 107 nfs_link, 108 nfs_rename, 109 nfs_mkdir, 110 nfs_rmdir, 111 nfs_symlink, 112 nfs_readdir, 113 nfs_readlink, 114 nfs_abortop, 115 nfs_inactive, 116 nfs_reclaim, 117 nfs_lock, 118 nfs_unlock, 119 nfs_bmap, 120 nfs_strategy, 121 }; 122 123 /* Special device vnode ops */ 124 int spec_lookup(), 125 spec_open(), 126 spec_read(), 127 spec_write(), 128 spec_strategy(), 129 spec_ioctl(), 130 spec_select(), 131 spec_close(), 132 spec_badop(), 133 spec_nullop(); 134 135 struct vnodeops spec_nfsv2nodeops = { 136 spec_lookup, 137 spec_badop, 138 spec_badop, 139 spec_open, 140 spec_close, 141 nfs_access, 142 nfs_getattr, 143 nfs_setattr, 144 spec_read, 145 spec_write, 146 spec_ioctl, 147 spec_select, 148 spec_badop, 149 spec_nullop, 150 spec_badop, 151 spec_badop, 152 spec_badop, 153 spec_badop, 154 spec_badop, 155 spec_badop, 156 spec_badop, 157 spec_badop, 158 spec_badop, 159 spec_badop, 160 nfs_inactive, 161 nfs_reclaim, 162 nfs_lock, 163 nfs_unlock, 164 spec_badop, 165 spec_strategy, 166 }; 167 168 extern u_long nfs_procids[NFS_NPROCS]; 169 extern u_long nfs_prog, nfs_vers; 170 extern char nfsiobuf[MAXPHYS+NBPG]; 171 struct map nfsmap[NFS_MSIZ]; 172 enum vtype v_type[NFLNK+1]; 173 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 174 int nfs_asyncdaemons = 0; 175 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 176 static int nfsmap_want = 0; 177 178 /* 179 * nfs null call from vfs. 180 */ 181 nfs_null(vp, cred) 182 struct vnode *vp; 183 struct ucred *cred; 184 { 185 nfsm_vars; 186 187 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 188 nfsm_request(vp); 189 nfsm_reqdone; 190 return (error); 191 } 192 193 /* 194 * nfs access vnode op. 195 * Essentially just get vattr and then imitate iaccess() 196 */ 197 nfs_access(vp, mode, cred) 198 struct vnode *vp; 199 int mode; 200 register struct ucred *cred; 201 { 202 register struct vattr *vap; 203 register gid_t *gp; 204 struct vattr vattr; 205 register int i; 206 int error; 207 208 /* 209 * If you're the super-user, 210 * you always get access. 211 */ 212 if (cred->cr_uid == 0) 213 return (0); 214 vap = &vattr; 215 if (error = nfs_getattr(vp, vap, cred)) 216 return (error); 217 /* 218 * Access check is based on only one of owner, group, public. 219 * If not owner, then check group. If not a member of the 220 * group, then check public access. 221 */ 222 if (cred->cr_uid != vap->va_uid) { 223 mode >>= 3; 224 gp = cred->cr_groups; 225 for (i = 0; i < cred->cr_ngroups; i++, gp++) 226 if (vap->va_gid == *gp) 227 goto found; 228 mode >>= 3; 229 found: 230 ; 231 } 232 if ((vap->va_mode & mode) != 0) 233 return (0); 234 return (EACCES); 235 } 236 237 /* 238 * nfs open vnode op 239 * Just check to see if the type is ok 240 */ 241 nfs_open(vp, mode, cred) 242 struct vnode *vp; 243 int mode; 244 struct ucred *cred; 245 { 246 register enum vtype vtyp; 247 248 vtyp = vp->v_type; 249 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 250 return (0); 251 else 252 return (EACCES); 253 } 254 255 /* 256 * nfs close vnode op 257 * For reg files, invalidate any buffer cache entries. 258 */ 259 nfs_close(vp, fflags, cred) 260 register struct vnode *vp; 261 int fflags; 262 struct ucred *cred; 263 { 264 struct nfsnode *np = VTONFS(vp); 265 dev_t dev; 266 int error = 0; 267 268 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 269 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 270 nfs_lock(vp); 271 np->n_flag &= ~(NMODIFIED|NBUFFERED); 272 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 273 if (np->n_flag & NWRITEERR) { 274 np->n_flag &= ~NWRITEERR; 275 if (!error) 276 error = np->n_error ? np->n_error : EIO; 277 } 278 nfs_unlock(vp); 279 } 280 return (error); 281 } 282 283 /* 284 * nfs getattr call from vfs. 285 */ 286 nfs_getattr(vp, vap, cred) 287 struct vnode *vp; 288 register struct vattr *vap; 289 struct ucred *cred; 290 { 291 nfsm_vars; 292 293 /* First look in the cache.. */ 294 if (nfs_getattrcache(vp, vap) == 0) 295 return (0); 296 nfsstats.rpccnt[NFSPROC_GETATTR]++; 297 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 298 nfsm_fhtom(vp); 299 nfsm_request(vp); 300 nfsm_loadattr(vp, vap); 301 nfsm_reqdone; 302 return (error); 303 } 304 305 /* 306 * nfs setattr call. 307 */ 308 nfs_setattr(vp, vap, cred) 309 struct vnode *vp; 310 register struct vattr *vap; 311 struct ucred *cred; 312 { 313 register struct nfsv2_sattr *sp; 314 nfsm_vars; 315 struct nfsnode *np; 316 317 nfsstats.rpccnt[NFSPROC_SETATTR]++; 318 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 319 nfsm_fhtom(vp); 320 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 321 if (vap->va_mode == 0xffff) 322 sp->sa_mode = VNOVAL; 323 else 324 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 325 if (vap->va_uid == 0xffff) 326 sp->sa_uid = VNOVAL; 327 else 328 sp->sa_uid = txdr_unsigned(vap->va_uid); 329 if (vap->va_gid == 0xffff) 330 sp->sa_gid = VNOVAL; 331 else 332 sp->sa_gid = txdr_unsigned(vap->va_gid); 333 sp->sa_size = txdr_unsigned(vap->va_size); 334 if (vap->va_size != VNOVAL) { 335 np = VTONFS(vp); 336 if (np->n_flag & NMODIFIED) { 337 np->n_flag &= ~NMODIFIED; 338 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 339 } 340 } 341 txdr_time(&vap->va_atime, &sp->sa_atime); 342 txdr_time(&vap->va_mtime, &sp->sa_mtime); 343 nfsm_request(vp); 344 nfsm_loadattr(vp, (struct vattr *)0); 345 /* should we fill in any vap fields ?? */ 346 nfsm_reqdone; 347 return (error); 348 } 349 350 /* 351 * nfs lookup call, one step at a time... 352 * First look in cache 353 * If not found, unlock the directory nfsnode and do the rpc 354 */ 355 nfs_lookup(vp, ndp) 356 register struct vnode *vp; 357 register struct nameidata *ndp; 358 { 359 register struct vnode *vdp; 360 nfsm_vars; 361 struct vnode *newvp; 362 long len; 363 nfsv2fh_t *fhp; 364 struct nfsnode *np; 365 int lockparent, wantparent, flag; 366 dev_t rdev; 367 368 ndp->ni_dvp = vp; 369 ndp->ni_vp = NULL; 370 if (vp->v_type != VDIR) 371 return (ENOTDIR); 372 lockparent = ndp->ni_nameiop & LOCKPARENT; 373 flag = ndp->ni_nameiop & OPFLAG; 374 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 375 if ((error = cache_lookup(ndp)) && error != ENOENT) { 376 struct vattr vattr; 377 int vpid; 378 379 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 380 panic("nfs_lookup: .. through root"); 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 error = 0; 390 } else if (ndp->ni_isdotdot) { 391 nfs_unlock(vp); 392 error = vget(vdp); 393 } else { 394 error = vget(vdp); 395 nfs_unlock(vp); 396 } 397 if (!error) { 398 if (vpid == vdp->v_id && 399 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 400 nfsstats.lookupcache_hits++; 401 return (0); 402 } else { 403 nfs_nput(vdp); 404 } 405 } 406 nfs_lock(vp); 407 ndp->ni_vp = (struct vnode *)0; 408 } 409 error = 0; 410 nfsstats.lookupcache_misses++; 411 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 412 len = ndp->ni_namelen; 413 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 414 nfsm_fhtom(vp); 415 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 416 nfsm_request(vp); 417 nfsmout: 418 if (error) { 419 if ((flag == CREATE || flag == RENAME) && 420 *ndp->ni_next == 0) { 421 if (!lockparent) 422 nfs_unlock(vp); 423 } 424 return (ENOENT); 425 } 426 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 427 428 /* 429 * Handle DELETE and RENAME cases... 430 */ 431 if (flag == DELETE && *ndp->ni_next == 0) { 432 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 433 VREF(vp); 434 newvp = vp; 435 np = VTONFS(vp); 436 } else { 437 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 438 m_freem(mrep); 439 return (error); 440 } 441 newvp = NFSTOV(np); 442 } 443 if (error = 444 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 445 if (newvp != vp) 446 nfs_nput(newvp); 447 else 448 vrele(vp); 449 m_freem(mrep); 450 return (error); 451 } 452 ndp->ni_vp = newvp; 453 if (!lockparent) 454 nfs_unlock(vp); 455 m_freem(mrep); 456 return (0); 457 } 458 459 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 460 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 461 m_freem(mrep); 462 return (EISDIR); 463 } 464 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 465 m_freem(mrep); 466 return (error); 467 } 468 newvp = NFSTOV(np); 469 if (error = 470 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 471 nfs_nput(newvp); 472 m_freem(mrep); 473 return (error); 474 } 475 ndp->ni_vp = newvp; 476 if (!lockparent) 477 nfs_unlock(vp); 478 return (0); 479 } 480 481 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 482 VREF(vp); 483 newvp = vp; 484 np = VTONFS(vp); 485 } else if (ndp->ni_isdotdot) { 486 nfs_unlock(vp); 487 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 488 nfs_lock(vp); 489 m_freem(mrep); 490 return (error); 491 } 492 nfs_lock(vp); 493 newvp = NFSTOV(np); 494 } else { 495 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 496 m_freem(mrep); 497 return (error); 498 } 499 newvp = NFSTOV(np); 500 } 501 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 502 if (newvp != vp) 503 nfs_nput(newvp); 504 else 505 vrele(vp); 506 m_freem(mrep); 507 return (error); 508 } 509 m_freem(mrep); 510 511 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 512 nfs_unlock(vp); 513 ndp->ni_vp = newvp; 514 if (error == 0 && ndp->ni_makeentry) 515 cache_enter(ndp); 516 return (error); 517 } 518 519 /* 520 * nfs readlink call 521 */ 522 nfs_readlink(vp, uiop, cred) 523 struct vnode *vp; 524 struct uio *uiop; 525 struct ucred *cred; 526 { 527 nfsm_vars; 528 long len; 529 530 nfsstats.rpccnt[NFSPROC_READLINK]++; 531 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 532 nfsm_fhtom(vp); 533 nfsm_request(vp); 534 nfsm_strsiz(len, NFS_MAXPATHLEN); 535 nfsm_mtouio(uiop, len); 536 nfsm_reqdone; 537 return (error); 538 } 539 540 /* 541 * nfs read call 542 */ 543 nfs_readrpc(vp, uiop, offp, cred) 544 struct vnode *vp; 545 struct uio *uiop; 546 off_t *offp; 547 struct ucred *cred; 548 { 549 nfsm_vars; 550 struct nfsmount *nmp; 551 long len, retlen, tsiz; 552 553 nmp = vfs_to_nfs(vp->v_mount); 554 tsiz = uiop->uio_resid; 555 while (tsiz > 0) { 556 nfsstats.rpccnt[NFSPROC_READ]++; 557 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 558 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 559 nfsm_fhtom(vp); 560 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 561 *p++ = txdr_unsigned(*offp); 562 *p++ = txdr_unsigned(len); 563 *p = 0; 564 nfsm_request(vp); 565 nfsm_loadattr(vp, (struct vattr *)0); 566 nfsm_strsiz(retlen, nmp->nm_rsize); 567 nfsm_mtouio(uiop, retlen); 568 m_freem(mrep); 569 *offp += retlen; 570 if (retlen < len) 571 tsiz = 0; 572 else 573 tsiz -= len; 574 } 575 nfsmout: 576 return (error); 577 } 578 579 /* 580 * nfs write call 581 */ 582 nfs_writerpc(vp, uiop, offp, cred) 583 struct vnode *vp; 584 struct uio *uiop; 585 off_t *offp; 586 struct ucred *cred; 587 { 588 nfsm_vars; 589 struct nfsmount *nmp; 590 long len, tsiz; 591 592 nmp = vfs_to_nfs(vp->v_mount); 593 tsiz = uiop->uio_resid; 594 while (tsiz > 0) { 595 nfsstats.rpccnt[NFSPROC_WRITE]++; 596 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 597 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 598 NFSX_FH+NFSX_UNSIGNED*4); 599 nfsm_fhtom(vp); 600 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 601 *(p+1) = txdr_unsigned(*offp); 602 *(p+3) = txdr_unsigned(len); 603 nfsm_uiotom(uiop, len); 604 nfsm_request(vp); 605 nfsm_loadattr(vp, (struct vattr *)0); 606 m_freem(mrep); 607 tsiz -= len; 608 *offp += len; 609 } 610 nfsmout: 611 return (error); 612 } 613 614 /* 615 * nfs mknod call 616 * This call is currently not supported. 617 */ 618 /* ARGSUSED */ 619 nfs_mknod(ndp, vap, cred) 620 struct nameidata *ndp; 621 struct ucred *cred; 622 struct vattr *vap; 623 { 624 625 nfs_abortop(ndp); 626 return (EOPNOTSUPP); 627 } 628 629 /* 630 * nfs file create call 631 */ 632 nfs_create(ndp, vap) 633 register struct nameidata *ndp; 634 register struct vattr *vap; 635 { 636 register struct nfsv2_sattr *sp; 637 nfsm_vars; 638 639 nfsstats.rpccnt[NFSPROC_CREATE]++; 640 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 641 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 642 nfsm_fhtom(ndp->ni_dvp); 643 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 644 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 645 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 646 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 647 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 648 sp->sa_size = txdr_unsigned(0); 649 /* or should these be VNOVAL ?? */ 650 txdr_time(&vap->va_atime, &sp->sa_atime); 651 txdr_time(&vap->va_mtime, &sp->sa_mtime); 652 nfsm_request(ndp->ni_dvp); 653 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 654 nfsm_reqdone; 655 nfs_nput(ndp->ni_dvp); 656 return (error); 657 } 658 659 /* 660 * nfs file remove call 661 * To try and make nfs semantics closer to vfs semantics, a file that has 662 * other references to the vnode is renamed instead of removed and then 663 * removed later on the last close. 664 * Unfortunately you must flush the buffer cache and cmap to get rid of 665 * all extraneous vnode references before you check the reference cnt. 666 * 1 - If the file could have blocks in the buffer cache 667 * flush them out and invalidate them 668 * mpurge the vnode to flush out cmap references 669 * (This is necessary to update the vnode ref cnt as well as sensible 670 * for actual removes, to free up the buffers) 671 * 2 - If v_count > 1 672 * If a rename is not already in the works 673 * call nfs_sillyrename() to set it up 674 * else 675 * do the remove rpc 676 */ 677 nfs_remove(ndp) 678 register struct nameidata *ndp; 679 { 680 register struct vnode *vp = ndp->ni_vp; 681 register struct nfsnode *np = VTONFS(ndp->ni_vp); 682 nfsm_vars; 683 684 if (vp->v_type == VREG) { 685 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 686 np->n_flag &= ~(NMODIFIED|NBUFFERED); 687 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 688 } 689 if (np->n_flag & NPAGEDON) 690 mpurge(vp); /* In case cmap entries still ref it */ 691 } 692 if (vp->v_count > 1) { 693 if (!np->n_sillyrename) 694 error = nfs_sillyrename(ndp, REMOVE); 695 } else { 696 nfsstats.rpccnt[NFSPROC_REMOVE]++; 697 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 698 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 699 nfsm_fhtom(ndp->ni_dvp); 700 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 701 nfsm_request(ndp->ni_dvp); 702 nfsm_reqdone; 703 } 704 if (ndp->ni_dvp == ndp->ni_vp) 705 vrele(ndp->ni_vp); 706 else 707 nfs_nput(ndp->ni_vp); 708 nfs_nput(ndp->ni_dvp); 709 return (error); 710 } 711 712 /* 713 * nfs file remove rpc called from nfs_inactive 714 */ 715 nfs_removeit(ndp) 716 register struct nameidata *ndp; 717 { 718 nfsm_vars; 719 720 nfsstats.rpccnt[NFSPROC_REMOVE]++; 721 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 722 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 723 nfsm_fhtom(ndp->ni_dvp); 724 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 725 nfsm_request(ndp->ni_dvp); 726 nfsm_reqdone; 727 return (error); 728 } 729 730 /* 731 * nfs file rename call 732 */ 733 nfs_rename(sndp, tndp) 734 register struct nameidata *sndp, *tndp; 735 { 736 nfsm_vars; 737 738 nfsstats.rpccnt[NFSPROC_RENAME]++; 739 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 740 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 741 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 742 nfsm_fhtom(sndp->ni_dvp); 743 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 744 nfsm_fhtom(tndp->ni_dvp); 745 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 746 nfsm_request(sndp->ni_dvp); 747 nfsm_reqdone; 748 if (sndp->ni_vp->v_type == VDIR) { 749 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 750 cache_purge(tndp->ni_dvp); 751 cache_purge(sndp->ni_dvp); 752 } 753 nfs_abortop(sndp); 754 nfs_abortop(tndp); 755 return (error); 756 } 757 758 /* 759 * nfs file rename rpc called from above 760 */ 761 nfs_renameit(sndp, tndp) 762 register struct nameidata *sndp, *tndp; 763 { 764 nfsm_vars; 765 766 nfsstats.rpccnt[NFSPROC_RENAME]++; 767 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 768 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 769 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 770 nfsm_fhtom(sndp->ni_dvp); 771 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 772 nfsm_fhtom(tndp->ni_dvp); 773 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 774 nfsm_request(sndp->ni_dvp); 775 nfsm_reqdone; 776 return (error); 777 } 778 779 /* 780 * nfs hard link create call 781 */ 782 nfs_link(vp, ndp) 783 struct vnode *vp; 784 register struct nameidata *ndp; 785 { 786 nfsm_vars; 787 788 if (ndp->ni_dvp != vp) 789 nfs_lock(vp); 790 nfsstats.rpccnt[NFSPROC_LINK]++; 791 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 792 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 793 nfsm_fhtom(vp); 794 nfsm_fhtom(ndp->ni_dvp); 795 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 796 nfsm_request(vp); 797 nfsm_reqdone; 798 if (ndp->ni_dvp != vp) 799 nfs_unlock(vp); 800 nfs_nput(ndp->ni_dvp); 801 return (error); 802 } 803 804 /* 805 * nfs symbolic link create call 806 */ 807 nfs_symlink(ndp, vap, nm) 808 struct nameidata *ndp; 809 struct vattr *vap; 810 char *nm; /* is this the path ?? */ 811 { 812 register struct nfsv2_sattr *sp; 813 nfsm_vars; 814 815 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 816 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 817 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 818 nfsm_fhtom(ndp->ni_dvp); 819 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 820 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 821 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 822 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 823 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 824 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 825 sp->sa_size = txdr_unsigned(VNOVAL); 826 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 827 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 828 nfsm_request(ndp->ni_dvp); 829 nfsm_reqdone; 830 nfs_nput(ndp->ni_dvp); 831 return (error); 832 } 833 834 /* 835 * nfs make dir call 836 */ 837 nfs_mkdir(ndp, vap) 838 struct nameidata *ndp; 839 struct vattr *vap; 840 { 841 register struct nfsv2_sattr *sp; 842 nfsm_vars; 843 844 nfsstats.rpccnt[NFSPROC_MKDIR]++; 845 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 846 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 847 nfsm_fhtom(ndp->ni_dvp); 848 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 849 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 850 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 851 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 852 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 853 sp->sa_size = txdr_unsigned(VNOVAL); 854 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 855 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 856 nfsm_request(ndp->ni_dvp); 857 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 858 nfsm_reqdone; 859 nfs_nput(ndp->ni_dvp); 860 return (error); 861 } 862 863 /* 864 * nfs remove directory call 865 */ 866 nfs_rmdir(ndp) 867 register struct nameidata *ndp; 868 { 869 nfsm_vars; 870 871 if (ndp->ni_dvp == ndp->ni_vp) { 872 vrele(ndp->ni_dvp); 873 nfs_nput(ndp->ni_dvp); 874 return (EINVAL); 875 } 876 nfsstats.rpccnt[NFSPROC_RMDIR]++; 877 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 878 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 879 nfsm_fhtom(ndp->ni_dvp); 880 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 881 nfsm_request(ndp->ni_dvp); 882 nfsm_reqdone; 883 cache_purge(ndp->ni_dvp); 884 cache_purge(ndp->ni_vp); 885 nfs_nput(ndp->ni_vp); 886 nfs_nput(ndp->ni_dvp); 887 return (error); 888 } 889 890 /* 891 * nfs readdir call 892 * Although cookie is defined as opaque, I translate it to/from net byte 893 * order so that it looks more sensible. This appears consistent with the 894 * Ultrix implementation of NFS. 895 */ 896 nfs_readdir(vp, uiop, offp, cred) 897 struct vnode *vp; 898 struct uio *uiop; 899 off_t *offp; 900 struct ucred *cred; 901 { 902 register long len; 903 register struct direct *dp; 904 nfsm_vars; 905 struct mbuf *md2; 906 caddr_t dpos2; 907 int siz; 908 int more_dirs, eofflg; 909 off_t off, savoff; 910 struct direct *savdp; 911 912 nfs_lock(vp); 913 nfsstats.rpccnt[NFSPROC_READDIR]++; 914 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 915 nfsm_fhtom(vp); 916 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 917 off = *offp; 918 *p++ = txdr_unsigned(off); 919 *p = txdr_unsigned(uiop->uio_resid); 920 nfsm_request(vp); 921 siz = 0; 922 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 923 more_dirs = fxdr_unsigned(int, *p); 924 925 /* Save the position so that we can do nfsm_mtouio() later */ 926 dpos2 = dpos; 927 md2 = md; 928 929 /* loop thru the dir entries, doctoring them to 4bsd form */ 930 while (more_dirs && siz < uiop->uio_resid) { 931 savoff = off; /* Hold onto offset and dp */ 932 savdp = dp; 933 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 934 dp = (struct direct *)p; 935 dp->d_ino = fxdr_unsigned(u_long, *p++); 936 len = fxdr_unsigned(int, *p); 937 if (len <= 0 || len > NFS_MAXNAMLEN) { 938 error = EBADRPC; 939 m_freem(mrep); 940 goto nfsmout; 941 } 942 dp->d_namlen = (u_short)len; 943 len = nfsm_rndup(len); 944 nfsm_adv(len); 945 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 946 off = fxdr_unsigned(off_t, *p); 947 *p++ = 0; /* Ensures null termination of name */ 948 more_dirs = fxdr_unsigned(int, *p); 949 dp->d_reclen = len+4*NFSX_UNSIGNED; 950 siz += dp->d_reclen; 951 } 952 /* 953 * If at end of rpc data, get the eof boolean 954 */ 955 if (!more_dirs) { 956 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 957 eofflg = fxdr_unsigned(long, *p); 958 } 959 /* 960 * If there is too much to fit in the data buffer, use savoff and 961 * savdp to trim off the last record. 962 * --> we are not at eof 963 */ 964 if (siz > uiop->uio_resid) { 965 eofflg = FALSE; 966 off = savoff; 967 siz -= dp->d_reclen; 968 dp = savdp; 969 } 970 if (siz > 0) { 971 #ifdef notdef 972 if (!eofflg) 973 dp->d_reclen += (uiop->uio_resid-siz); 974 #endif 975 md = md2; 976 dpos = dpos2; 977 nfsm_mtouio(uiop, siz); 978 #ifdef notdef 979 if (!eofflg) 980 uiop->uio_resid = 0; 981 #endif 982 *offp = off; 983 } 984 nfsm_reqdone; 985 nfs_unlock(vp); 986 return (error); 987 } 988 989 /* 990 * nfs statfs call 991 * (Actually a vfsop, not a vnode op) 992 */ 993 nfs_statfs(mp, sbp) 994 struct mount *mp; 995 register struct statfs *sbp; 996 { 997 register struct nfsv2_statfs *sfp; 998 nfsm_vars; 999 struct nfsmount *nmp; 1000 struct ucred *cred; 1001 struct nfsnode *np; 1002 struct vnode *vp; 1003 1004 nmp = vfs_to_nfs(mp); 1005 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 1006 return (error); 1007 vp = NFSTOV(np); 1008 nfsstats.rpccnt[NFSPROC_STATFS]++; 1009 cred = crget(); 1010 cred->cr_ngroups = 1; 1011 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1012 nfsm_fhtom(vp); 1013 nfsm_request(vp); 1014 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1015 sbp->f_type = MOUNT_NFS; 1016 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1017 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1018 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1019 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1020 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1021 sbp->f_files = 0; 1022 sbp->f_ffree = 0; 1023 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1024 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1025 nfsm_reqdone; 1026 nfs_nput(vp); 1027 crfree(cred); 1028 return (error); 1029 } 1030 1031 #define HEXTOASC(x) "0123456789abcdef"[x] 1032 1033 /* 1034 * Silly rename. To make the NFS filesystem that is stateless look a little 1035 * more like the "ufs" a remove of an active vnode is translated to a rename 1036 * to a funny looking filename that is removed by nfs_inactive on the 1037 * nfsnode. There is the potential for another process on a different client 1038 * to create the same funny name between the nfs_lookitup() fails and the 1039 * nfs_rename() completes, but... 1040 */ 1041 nfs_sillyrename(ndp, flag) 1042 struct nameidata *ndp; 1043 int flag; 1044 { 1045 register struct nfsnode *np; 1046 register struct sillyrename *sp; 1047 register struct nameidata *tndp; 1048 int error; 1049 short pid; 1050 1051 np = VTONFS(ndp->ni_dvp); 1052 cache_purge(ndp->ni_dvp); 1053 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1054 M_TEMP, M_WAITOK); 1055 sp->s_flag = flag; 1056 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1057 np = VTONFS(ndp->ni_vp); 1058 tndp = &sp->s_namei; 1059 tndp->ni_cred = crdup(ndp->ni_cred); 1060 1061 /* Fudge together a funny name */ 1062 pid = u.u_procp->p_pid; 1063 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1064 tndp->ni_dent.d_namlen = 12; 1065 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1066 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1067 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1068 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1069 1070 /* Try lookitups until we get one that isn't there */ 1071 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1072 tndp->ni_dent.d_name[4]++; 1073 if (tndp->ni_dent.d_name[4] > 'z') { 1074 error = EINVAL; 1075 goto bad; 1076 } 1077 } 1078 if (error = nfs_renameit(ndp, tndp)) 1079 goto bad; 1080 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1081 np->n_sillyrename = sp; 1082 return (0); 1083 bad: 1084 crfree(tndp->ni_cred); 1085 free((caddr_t)sp, M_TEMP); 1086 return (error); 1087 } 1088 1089 /* 1090 * Look up a file name for silly rename stuff. 1091 * Just like nfs_lookup() except that it doesn't load returned values 1092 * into the nfsnode table. 1093 * If fhp != NULL it copies the returned file handle out 1094 */ 1095 nfs_lookitup(vp, ndp, fhp) 1096 register struct vnode *vp; 1097 register struct nameidata *ndp; 1098 nfsv2fh_t *fhp; 1099 { 1100 nfsm_vars; 1101 long len; 1102 1103 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1104 ndp->ni_dvp = vp; 1105 ndp->ni_vp = NULL; 1106 len = ndp->ni_dent.d_namlen; 1107 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1108 nfsm_fhtom(vp); 1109 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1110 nfsm_request(vp); 1111 if (fhp != NULL) { 1112 nfsm_disect(cp, caddr_t, NFSX_FH); 1113 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1114 } 1115 nfsm_reqdone; 1116 return (error); 1117 } 1118 1119 /* 1120 * Kludge City.. 1121 * - make nfs_bmap() essentially a no-op that does no translation 1122 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1123 * after mapping the physical addresses into Kernel Virtual space in the 1124 * nfsiobuf area. 1125 * (Maybe I could use the process's page mapping, but I was concerned that 1126 * Kernel Write might not be enabled and also figured copyout() would do 1127 * a lot more work than bcopy() and also it currently happens in the 1128 * context of the swapper process (2). 1129 */ 1130 nfs_bmap(vp, bn, vpp, bnp) 1131 struct vnode *vp; 1132 daddr_t bn; 1133 struct vnode **vpp; 1134 daddr_t *bnp; 1135 { 1136 if (vpp != NULL) 1137 *vpp = vp; 1138 if (bnp != NULL) 1139 *bnp = bn * btodb(vp->v_mount->m_bsize); 1140 return (0); 1141 } 1142 1143 /* 1144 * Strategy routine for phys. i/o 1145 * If the biod's are running, queue a request 1146 * otherwise just call nfs_doio() to get it done 1147 */ 1148 nfs_strategy(bp) 1149 register struct buf *bp; 1150 { 1151 register struct buf *dp; 1152 register int i; 1153 struct proc *rp; 1154 int error = 0; 1155 int fnd = 0; 1156 1157 /* 1158 * If an i/o daemon is waiting 1159 * queue the request, wake it up and wait for completion 1160 * otherwise just do it ourselves 1161 */ 1162 for (i = 0; i < nfs_asyncdaemons; i++) { 1163 if (rp = nfs_iodwant[i]) { 1164 /* 1165 * Ensure that the async_daemon is still waiting here 1166 */ 1167 if (rp->p_stat != SSLEEP || 1168 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1169 nfs_iodwant[i] = (struct proc *)0; 1170 continue; 1171 } 1172 dp = &nfs_bqueue; 1173 if (dp->b_actf == NULL) { 1174 dp->b_actl = bp; 1175 bp->b_actf = dp; 1176 } else { 1177 dp->b_actf->b_actl = bp; 1178 bp->b_actf = dp->b_actf; 1179 } 1180 dp->b_actf = bp; 1181 bp->b_actl = dp; 1182 fnd++; 1183 nfs_iodwant[i] = (struct proc *)0; 1184 wakeup((caddr_t)&nfs_iodwant[i]); 1185 break; 1186 } 1187 } 1188 if (!fnd) 1189 error = nfs_doio(bp); 1190 return (error); 1191 } 1192 1193 /* 1194 * Fun and games with i/o 1195 * Essentially play ubasetup() and disk interrupt service routine by 1196 * mapping the data buffer into kernel virtual space and doing the 1197 * nfs read or write rpc's from it. 1198 * If the biod's are not running, this is just called from nfs_strategy(), 1199 * otherwise it is called by the biod's to do what would normally be 1200 * partially disk interrupt driven. 1201 */ 1202 nfs_doio(bp) 1203 register struct buf *bp; 1204 { 1205 register struct pte *pte, *ppte; 1206 register caddr_t vaddr; 1207 register struct uio *uiop; 1208 register struct vnode *vp; 1209 struct nfsnode *np; 1210 struct ucred *cr; 1211 int npf, npf2; 1212 int reg; 1213 caddr_t vbase; 1214 caddr_t addr; 1215 unsigned v; 1216 struct proc *rp; 1217 int o, error; 1218 int bcnt; 1219 off_t off; 1220 struct uio uio; 1221 struct iovec io; 1222 1223 vp = bp->b_vp; 1224 uiop = &uio; 1225 uiop->uio_iov = &io; 1226 uiop->uio_iovcnt = 1; 1227 uiop->uio_segflg = UIO_SYSSPACE; 1228 if (bp->b_flags & B_READ) { 1229 io.iov_len = uiop->uio_resid = bp->b_bcount; 1230 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1231 addr = bp->b_un.b_addr; 1232 bcnt = bp->b_bcount; 1233 } else { 1234 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1235 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1236 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1237 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1238 } 1239 /* 1240 * For phys i/o, map the b_addr into kernel virtual space using 1241 * the Nfsiomap pte's 1242 * Also, add a temporary b_rcred for reading using the process's uid 1243 * and a guess at a group 1244 */ 1245 if (bp->b_flags & B_PHYS) { 1246 VTONFS(vp)->n_flag |= NPAGEDON; 1247 bp->b_rcred = cr = crget(); 1248 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1249 cr->cr_uid = rp->p_uid; 1250 cr->cr_gid = 0; /* Anything ?? */ 1251 cr->cr_ngroups = 1; 1252 o = (int)addr & PGOFSET; 1253 npf2 = npf = btoc(bcnt + o); 1254 /* 1255 * Get some mapping page table entries 1256 */ 1257 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1258 nfsmap_want++; 1259 sleep((caddr_t)&nfsmap_want, PZERO-1); 1260 } 1261 reg--; 1262 /* I know it is always the else, but that may change someday */ 1263 if ((bp->b_flags & B_PHYS) == 0) 1264 pte = kvtopte(bp->b_un.b_addr); 1265 else if (bp->b_flags & B_PAGET) 1266 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1267 else { 1268 v = btop(bp->b_un.b_addr); 1269 if (bp->b_flags & B_UAREA) 1270 pte = &rp->p_addr[v]; 1271 else 1272 pte = vtopte(rp, v); 1273 } 1274 /* 1275 * Play vmaccess() but with the Nfsiomap page table 1276 */ 1277 ppte = &Nfsiomap[reg]; 1278 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1279 while (npf != 0) { 1280 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1281 #if defined(tahoe) 1282 mtpr(P1DC, vaddr); 1283 #endif 1284 ppte++; 1285 pte++; 1286 vaddr += NBPG; 1287 --npf; 1288 } 1289 io.iov_base = vbase+o; 1290 } else { 1291 io.iov_base = addr; 1292 } 1293 if (bp->b_flags & B_READ) { 1294 uiop->uio_rw = UIO_READ; 1295 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1296 } else { 1297 uiop->uio_rw = UIO_WRITE; 1298 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1299 if (error) { 1300 np = VTONFS(vp); 1301 np->n_error = error; 1302 np->n_flag |= NWRITEERR; 1303 } 1304 bp->b_dirtyoff = bp->b_dirtyend = 0; 1305 } 1306 if (error) 1307 bp->b_flags |= B_ERROR; 1308 bp->b_resid = uiop->uio_resid; 1309 /* 1310 * Release pte's used by physical i/o 1311 */ 1312 if (bp->b_flags & B_PHYS) { 1313 crfree(cr); 1314 rmfree(nfsmap, (long)npf2, (long)++reg); 1315 if (nfsmap_want) { 1316 nfsmap_want = 0; 1317 wakeup((caddr_t)&nfsmap_want); 1318 } 1319 } 1320 biodone(bp); 1321 return (error); 1322 } 1323 1324 /* 1325 * Flush all the blocks associated with a vnode. 1326 * Walk through the buffer pool and push any dirty pages 1327 * associated with the vnode. 1328 */ 1329 nfs_fsync(vp, fflags, cred) 1330 register struct vnode *vp; 1331 int fflags; 1332 struct ucred *cred; 1333 { 1334 register struct nfsnode *np = VTONFS(vp); 1335 int error; 1336 1337 nfs_lock(vp); 1338 if (np->n_flag & NMODIFIED) { 1339 np->n_flag &= ~NMODIFIED; 1340 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1341 } 1342 nfs_unlock(vp); 1343 return (error); 1344 } 1345