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 7.8 (Berkeley) 10/21/89 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_lookup(), 122 blk_open(), 123 blk_read(), 124 blk_write(), 125 blk_ioctl(), 126 blk_select(); 127 128 struct vnodeops nfsv2chr_vnodeops = { 129 blk_lookup, 130 vfs_noop, 131 vfs_noop, 132 blk_open, 133 nfs_close, 134 nfs_access, 135 nfs_getattr, 136 nfs_setattr, 137 blk_read, 138 blk_write, 139 blk_ioctl, 140 blk_select, 141 vfs_noop, 142 vfs_nullop, 143 vfs_noop, 144 nfs_remove, 145 nfs_link, 146 nfs_rename, 147 vfs_noop, 148 vfs_noop, 149 nfs_symlink, 150 vfs_noop, 151 vfs_noop, 152 nfs_abortop, 153 nfs_inactive, 154 nfs_lock, 155 nfs_unlock, 156 vfs_noop, 157 vfs_noop, 158 }; 159 160 extern u_long nfs_procids[NFS_NPROCS]; 161 extern u_long nfs_prog, nfs_vers; 162 extern char nfsiobuf[MAXPHYS+NBPG]; 163 struct map nfsmap[NFS_MSIZ]; 164 enum vtype v_type[NFLNK+1]; 165 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 166 int nfs_asyncdaemons = 0; 167 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 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 = 0; 260 261 nfs_lock(vp); 262 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 263 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 264 np->n_flag &= ~(NMODIFIED|NBUFFERED); 265 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 266 if (np->n_flag & NWRITEERR) { 267 np->n_flag &= ~NWRITEERR; 268 if (!error) 269 error = np->n_error ? np->n_error : EIO; 270 } 271 } 272 nfs_unlock(vp); 273 if (vp->v_type != VCHR || vp->v_count > 1) 274 return (error); 275 dev = vp->v_rdev; 276 /* XXX what is this doing below the vnode op call */ 277 if (setjmp(&u.u_qsave)) { 278 /* 279 * If device close routine is interrupted, 280 * must return so closef can clean up. 281 */ 282 error = EINTR; 283 } else 284 error = (*cdevsw[major(dev)].d_close)(dev, fflags, IFCHR); 285 /* 286 * Most device close routines don't return errors, 287 * and dup2() doesn't work right on error. 288 */ 289 error = 0; /* XXX */ 290 return (error); 291 } 292 293 /* 294 * nfs getattr call from vfs. 295 */ 296 nfs_getattr(vp, vap, cred) 297 struct vnode *vp; 298 register struct vattr *vap; 299 struct ucred *cred; 300 { 301 nfsm_vars; 302 303 /* First look in the cache.. */ 304 if (nfs_getattrcache(vp, vap) == 0) 305 return (0); 306 nfsstats.rpccnt[NFSPROC_GETATTR]++; 307 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 308 nfsm_fhtom(vp); 309 nfsm_request(vp); 310 nfsm_loadattr(vp, vap); 311 nfsm_reqdone; 312 return (error); 313 } 314 315 /* 316 * nfs setattr call. 317 */ 318 nfs_setattr(vp, vap, cred) 319 struct vnode *vp; 320 register struct vattr *vap; 321 struct ucred *cred; 322 { 323 register struct nfsv2_sattr *sp; 324 nfsm_vars; 325 struct nfsnode *np; 326 327 nfsstats.rpccnt[NFSPROC_SETATTR]++; 328 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 329 nfsm_fhtom(vp); 330 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 331 if (vap->va_mode == 0xffff) 332 sp->sa_mode = VNOVAL; 333 else 334 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 335 if (vap->va_uid == 0xffff) 336 sp->sa_uid = VNOVAL; 337 else 338 sp->sa_uid = txdr_unsigned(vap->va_uid); 339 if (vap->va_gid == 0xffff) 340 sp->sa_gid = VNOVAL; 341 else 342 sp->sa_gid = txdr_unsigned(vap->va_gid); 343 sp->sa_size = txdr_unsigned(vap->va_size); 344 if (vap->va_size != VNOVAL) { 345 np = VTONFS(vp); 346 if (np->n_flag & NMODIFIED) { 347 np->n_flag &= ~NMODIFIED; 348 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 349 } 350 } 351 txdr_time(&vap->va_atime, &sp->sa_atime); 352 txdr_time(&vap->va_mtime, &sp->sa_mtime); 353 nfsm_request(vp); 354 nfsm_loadattr(vp, (struct vattr *)0); 355 /* should we fill in any vap fields ?? */ 356 nfsm_reqdone; 357 return (error); 358 } 359 360 /* 361 * nfs lookup call, one step at a time... 362 * First look in cache 363 * If not found, unlock the directory nfsnode and do the rpc 364 */ 365 nfs_lookup(vp, ndp) 366 register struct vnode *vp; 367 register struct nameidata *ndp; 368 { 369 register struct vnode *vdp; 370 nfsm_vars; 371 struct vnode *newvp; 372 long len; 373 nfsv2fh_t *fhp; 374 struct nfsnode *np; 375 int lockparent, wantparent, flag; 376 dev_t rdev; 377 378 ndp->ni_dvp = vp; 379 ndp->ni_vp = NULL; 380 if (vp->v_type != VDIR) 381 return (ENOTDIR); 382 lockparent = ndp->ni_nameiop & LOCKPARENT; 383 flag = ndp->ni_nameiop & OPFLAG; 384 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 385 if ((error = cache_lookup(ndp)) && error != ENOENT) { 386 struct vattr vattr; 387 int vpid; 388 389 if (ndp->ni_vp == ndp->ni_rdir && ndp->ni_isdotdot) 390 vdp = vp; 391 else 392 vdp = ndp->ni_vp; 393 vpid = vdp->v_id; 394 /* 395 * See the comment starting `Step through' in ufs/ufs_lookup.c 396 * for an explanation of the locking protocol 397 */ 398 if (vp == vdp) { 399 VREF(vdp); 400 } else if (ndp->ni_isdotdot) { 401 nfs_unlock(vp); 402 nfs_ngrab(VTONFS(vdp)); 403 } else { 404 nfs_ngrab(VTONFS(vdp)); 405 nfs_unlock(vp); 406 } 407 if (vpid == vdp->v_id && 408 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 409 nfsstats.lookupcache_hits++; 410 return (0); 411 } 412 nfs_nput(vdp); 413 nfs_lock(vp); 414 ndp->ni_vp = (struct vnode *)0; 415 } 416 error = 0; 417 nfsstats.lookupcache_misses++; 418 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 419 len = ndp->ni_namelen; 420 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 421 nfsm_fhtom(vp); 422 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 423 nfsm_request(vp); 424 nfsmout: 425 if (error) { 426 if ((flag == CREATE || flag == RENAME) && 427 *ndp->ni_next == 0) { 428 if (!lockparent) 429 nfs_unlock(vp); 430 } 431 return (ENOENT); 432 } 433 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 434 435 /* 436 * Handle DELETE and RENAME cases... 437 */ 438 if (flag == DELETE && *ndp->ni_next == 0) { 439 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 440 VREF(vp); 441 newvp = vp; 442 np = VTONFS(vp); 443 } else { 444 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 445 m_freem(mrep); 446 return (error); 447 } 448 newvp = NFSTOV(np); 449 } 450 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 451 if (newvp != vp) 452 nfs_nput(newvp); 453 else 454 vrele(vp); 455 m_freem(mrep); 456 return (error); 457 } 458 ndp->ni_vp = newvp; 459 if (!lockparent) 460 nfs_unlock(vp); 461 m_freem(mrep); 462 return (0); 463 } 464 465 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 466 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 467 m_freem(mrep); 468 return (EISDIR); 469 } 470 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 471 m_freem(mrep); 472 return (error); 473 } 474 newvp = NFSTOV(np); 475 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 476 nfs_nput(newvp); 477 m_freem(mrep); 478 return (error); 479 } 480 ndp->ni_vp = newvp; 481 if (!lockparent) 482 nfs_unlock(vp); 483 return (0); 484 } 485 486 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 487 VREF(vp); 488 newvp = vp; 489 np = VTONFS(vp); 490 } else if (ndp->ni_isdotdot) { 491 nfs_unlock(vp); 492 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 493 nfs_lock(vp); 494 m_freem(mrep); 495 return (error); 496 } 497 nfs_lock(vp); 498 newvp = NFSTOV(np); 499 } else { 500 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 501 m_freem(mrep); 502 return (error); 503 } 504 newvp = NFSTOV(np); 505 } 506 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 507 if (newvp != vp) 508 nfs_nput(newvp); 509 else 510 vrele(vp); 511 m_freem(mrep); 512 return (error); 513 } 514 m_freem(mrep); 515 516 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 517 nfs_unlock(vp); 518 ndp->ni_vp = newvp; 519 if (error == 0 && ndp->ni_makeentry) 520 cache_enter(ndp); 521 return (error); 522 } 523 524 /* 525 * nfs readlink call 526 */ 527 nfs_readlink(vp, uiop, cred) 528 struct vnode *vp; 529 struct uio *uiop; 530 struct ucred *cred; 531 { 532 nfsm_vars; 533 long len; 534 535 nfsstats.rpccnt[NFSPROC_READLINK]++; 536 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 537 nfsm_fhtom(vp); 538 nfsm_request(vp); 539 nfsm_strsiz(len, NFS_MAXPATHLEN); 540 nfsm_mtouio(uiop, len); 541 nfsm_reqdone; 542 return (error); 543 } 544 545 /* 546 * nfs read call 547 */ 548 nfs_readrpc(vp, uiop, offp, cred) 549 struct vnode *vp; 550 struct uio *uiop; 551 off_t *offp; 552 struct ucred *cred; 553 { 554 nfsm_vars; 555 struct nfsmount *nmp; 556 long len, retlen, tsiz; 557 558 nmp = vfs_to_nfs(vp->v_mount); 559 tsiz = uiop->uio_resid; 560 while (tsiz > 0) { 561 nfsstats.rpccnt[NFSPROC_READ]++; 562 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 563 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 564 nfsm_fhtom(vp); 565 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 566 *p++ = txdr_unsigned(*offp); 567 *p++ = txdr_unsigned(len); 568 *p = 0; 569 nfsm_request(vp); 570 nfsm_loadattr(vp, (struct vattr *)0); 571 nfsm_strsiz(retlen, nmp->nm_rsize); 572 nfsm_mtouio(uiop, retlen); 573 m_freem(mrep); 574 *offp += retlen; 575 if (retlen < len) 576 tsiz = 0; 577 else 578 tsiz -= len; 579 } 580 nfsmout: 581 return (error); 582 } 583 584 /* 585 * nfs write call 586 */ 587 nfs_writerpc(vp, uiop, offp, cred) 588 struct vnode *vp; 589 struct uio *uiop; 590 off_t *offp; 591 struct ucred *cred; 592 { 593 nfsm_vars; 594 struct nfsmount *nmp; 595 long len, tsiz; 596 597 nmp = vfs_to_nfs(vp->v_mount); 598 tsiz = uiop->uio_resid; 599 while (tsiz > 0) { 600 nfsstats.rpccnt[NFSPROC_WRITE]++; 601 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 602 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 603 NFSX_FH+NFSX_UNSIGNED*4); 604 nfsm_fhtom(vp); 605 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 606 *(p+1) = txdr_unsigned(*offp); 607 *(p+3) = txdr_unsigned(len); 608 nfsm_uiotom(uiop, len); 609 nfsm_request(vp); 610 nfsm_loadattr(vp, (struct vattr *)0); 611 m_freem(mrep); 612 tsiz -= len; 613 *offp += len; 614 } 615 nfsmout: 616 return (error); 617 } 618 619 /* 620 * nfs file create call 621 */ 622 nfs_create(ndp, vap) 623 register struct nameidata *ndp; 624 register struct vattr *vap; 625 { 626 register struct nfsv2_sattr *sp; 627 nfsm_vars; 628 629 nfsstats.rpccnt[NFSPROC_CREATE]++; 630 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 631 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 632 nfsm_fhtom(ndp->ni_dvp); 633 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 634 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 635 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 636 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 637 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 638 sp->sa_size = txdr_unsigned(0); 639 /* or should these be VNOVAL ?? */ 640 txdr_time(&vap->va_atime, &sp->sa_atime); 641 txdr_time(&vap->va_mtime, &sp->sa_mtime); 642 nfsm_request(ndp->ni_dvp); 643 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 644 nfsm_reqdone; 645 nfs_nput(ndp->ni_dvp); 646 return (error); 647 } 648 649 /* 650 * nfs file remove call 651 * To try and make nfs semantics closer to vfs semantics, a file that has 652 * other references to the vnode is renamed instead of removed and then 653 * removed later on the last close. 654 * Unfortunately you must flush the buffer cache and cmap to get rid of 655 * all extraneous vnode references before you check the reference cnt. 656 * 1 - If the file could have blocks in the buffer cache 657 * flush them out and invalidate them 658 * mpurge the vnode to flush out cmap references 659 * (This is necessary to update the vnode ref cnt as well as sensible 660 * for actual removes, to free up the buffers) 661 * 2 - If v_count > 1 662 * If a rename is not already in the works 663 * call nfs_sillyrename() to set it up 664 * else 665 * do the remove rpc 666 */ 667 nfs_remove(ndp) 668 register struct nameidata *ndp; 669 { 670 register struct vnode *vp = ndp->ni_vp; 671 register struct nfsnode *np = VTONFS(ndp->ni_vp); 672 nfsm_vars; 673 674 if (vp->v_type == VREG) { 675 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 676 np->n_flag &= ~(NMODIFIED|NBUFFERED); 677 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 678 } 679 if (np->n_flag & NPAGEDON) 680 mpurge(vp); /* In case cmap entries still ref it */ 681 } 682 if (vp->v_count > 1) { 683 if (!np->n_sillyrename) 684 error = nfs_sillyrename(ndp, REMOVE); 685 } else { 686 nfsstats.rpccnt[NFSPROC_REMOVE]++; 687 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 688 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 689 nfsm_fhtom(ndp->ni_dvp); 690 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 691 nfsm_request(ndp->ni_dvp); 692 nfsm_reqdone; 693 } 694 if (ndp->ni_dvp == ndp->ni_vp) 695 vrele(ndp->ni_vp); 696 else 697 nfs_nput(ndp->ni_vp); 698 nfs_nput(ndp->ni_dvp); 699 return (error); 700 } 701 702 /* 703 * nfs file remove rpc called from nfs_inactive 704 */ 705 nfs_removeit(ndp) 706 register struct nameidata *ndp; 707 { 708 nfsm_vars; 709 710 nfsstats.rpccnt[NFSPROC_REMOVE]++; 711 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 712 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 713 nfsm_fhtom(ndp->ni_dvp); 714 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 715 nfsm_request(ndp->ni_dvp); 716 nfsm_reqdone; 717 return (error); 718 } 719 720 /* 721 * nfs file rename call 722 */ 723 nfs_rename(sndp, tndp) 724 register struct nameidata *sndp, *tndp; 725 { 726 nfsm_vars; 727 728 nfsstats.rpccnt[NFSPROC_RENAME]++; 729 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 730 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 731 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 732 nfsm_fhtom(sndp->ni_dvp); 733 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 734 nfsm_fhtom(tndp->ni_dvp); 735 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 736 nfsm_request(sndp->ni_dvp); 737 nfsm_reqdone; 738 if (sndp->ni_vp->v_type == VDIR) { 739 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 740 cache_purge(tndp->ni_dvp); 741 cache_purge(sndp->ni_dvp); 742 } 743 nfs_abortop(sndp); 744 nfs_abortop(tndp); 745 return (error); 746 } 747 748 /* 749 * nfs file rename rpc called from above 750 */ 751 nfs_renameit(sndp, tndp) 752 register struct nameidata *sndp, *tndp; 753 { 754 nfsm_vars; 755 756 nfsstats.rpccnt[NFSPROC_RENAME]++; 757 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 758 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 759 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 760 nfsm_fhtom(sndp->ni_dvp); 761 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 762 nfsm_fhtom(tndp->ni_dvp); 763 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 764 nfsm_request(sndp->ni_dvp); 765 nfsm_reqdone; 766 return (error); 767 } 768 769 /* 770 * nfs hard link create call 771 */ 772 nfs_link(vp, ndp) 773 struct vnode *vp; 774 register struct nameidata *ndp; 775 { 776 nfsm_vars; 777 778 if (ndp->ni_dvp != vp) 779 nfs_lock(vp); 780 nfsstats.rpccnt[NFSPROC_LINK]++; 781 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 782 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 783 nfsm_fhtom(vp); 784 nfsm_fhtom(ndp->ni_dvp); 785 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 786 nfsm_request(vp); 787 nfsm_reqdone; 788 if (ndp->ni_dvp != vp) 789 nfs_unlock(vp); 790 nfs_nput(ndp->ni_dvp); 791 return (error); 792 } 793 794 /* 795 * nfs symbolic link create call 796 */ 797 nfs_symlink(ndp, vap, nm) 798 struct nameidata *ndp; 799 struct vattr *vap; 800 char *nm; /* is this the path ?? */ 801 { 802 register struct nfsv2_sattr *sp; 803 nfsm_vars; 804 805 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 806 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 807 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 808 nfsm_fhtom(ndp->ni_dvp); 809 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 810 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 811 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 812 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 813 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 814 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 815 sp->sa_size = txdr_unsigned(VNOVAL); 816 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 817 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 818 nfsm_request(ndp->ni_dvp); 819 nfsm_reqdone; 820 nfs_nput(ndp->ni_dvp); 821 return (error); 822 } 823 824 /* 825 * nfs make dir call 826 */ 827 nfs_mkdir(ndp, vap) 828 struct nameidata *ndp; 829 struct vattr *vap; 830 { 831 register struct nfsv2_sattr *sp; 832 nfsm_vars; 833 834 nfsstats.rpccnt[NFSPROC_MKDIR]++; 835 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 836 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 837 nfsm_fhtom(ndp->ni_dvp); 838 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 839 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 840 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 841 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 842 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 843 sp->sa_size = txdr_unsigned(VNOVAL); 844 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 845 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 846 nfsm_request(ndp->ni_dvp); 847 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 848 nfsm_reqdone; 849 nfs_nput(ndp->ni_dvp); 850 return (error); 851 } 852 853 /* 854 * nfs remove directory call 855 */ 856 nfs_rmdir(ndp) 857 register struct nameidata *ndp; 858 { 859 nfsm_vars; 860 861 if (ndp->ni_dvp == ndp->ni_vp) { 862 vrele(ndp->ni_dvp); 863 nfs_nput(ndp->ni_dvp); 864 return (EINVAL); 865 } 866 nfsstats.rpccnt[NFSPROC_RMDIR]++; 867 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 868 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 869 nfsm_fhtom(ndp->ni_dvp); 870 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 871 nfsm_request(ndp->ni_dvp); 872 nfsm_reqdone; 873 cache_purge(ndp->ni_dvp); 874 cache_purge(ndp->ni_vp); 875 nfs_nput(ndp->ni_vp); 876 nfs_nput(ndp->ni_dvp); 877 return (error); 878 } 879 880 /* 881 * nfs readdir call 882 * Although cookie is defined as opaque, I translate it to/from net byte 883 * order so that it looks more sensible. This appears consistent with the 884 * Ultrix implementation of NFS. 885 */ 886 nfs_readdir(vp, uiop, offp, cred) 887 struct vnode *vp; 888 struct uio *uiop; 889 off_t *offp; 890 struct ucred *cred; 891 { 892 register long len; 893 register struct direct *dp; 894 nfsm_vars; 895 struct mbuf *md2; 896 caddr_t dpos2; 897 int siz; 898 int more_dirs, eofflg; 899 off_t off, savoff; 900 struct direct *savdp; 901 902 nfs_lock(vp); 903 nfsstats.rpccnt[NFSPROC_READDIR]++; 904 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 905 nfsm_fhtom(vp); 906 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 907 off = *offp; 908 *p++ = txdr_unsigned(off); 909 *p = txdr_unsigned(uiop->uio_resid); 910 nfsm_request(vp); 911 siz = 0; 912 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 913 more_dirs = fxdr_unsigned(int, *p); 914 915 /* Save the position so that we can do nfsm_mtouio() later */ 916 dpos2 = dpos; 917 md2 = md; 918 919 /* loop thru the dir entries, doctoring them to 4bsd form */ 920 while (more_dirs && siz < uiop->uio_resid) { 921 savoff = off; /* Hold onto offset and dp */ 922 savdp = dp; 923 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 924 dp = (struct direct *)p; 925 dp->d_ino = fxdr_unsigned(u_long, *p++); 926 len = fxdr_unsigned(int, *p); 927 if (len <= 0 || len > NFS_MAXNAMLEN) { 928 error = EBADRPC; 929 m_freem(mrep); 930 goto nfsmout; 931 } 932 dp->d_namlen = (u_short)len; 933 len = nfsm_rndup(len); 934 nfsm_adv(len); 935 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 936 off = fxdr_unsigned(off_t, *p); 937 *p++ = 0; /* Ensures null termination of name */ 938 more_dirs = fxdr_unsigned(int, *p); 939 dp->d_reclen = len+4*NFSX_UNSIGNED; 940 siz += dp->d_reclen; 941 } 942 /* 943 * If at end of rpc data, get the eof boolean 944 */ 945 if (!more_dirs) { 946 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 947 eofflg = fxdr_unsigned(long, *p); 948 } 949 /* 950 * If there is too much to fit in the data buffer, use savoff and 951 * savdp to trim off the last record. 952 * --> we are not at eof 953 */ 954 if (siz > uiop->uio_resid) { 955 eofflg = FALSE; 956 off = savoff; 957 siz -= dp->d_reclen; 958 dp = savdp; 959 } 960 if (siz > 0) { 961 #ifdef notdef 962 if (!eofflg) 963 dp->d_reclen += (uiop->uio_resid-siz); 964 #endif 965 md = md2; 966 dpos = dpos2; 967 nfsm_mtouio(uiop, siz); 968 #ifdef notdef 969 if (!eofflg) 970 uiop->uio_resid = 0; 971 #endif 972 *offp = off; 973 } 974 nfsm_reqdone; 975 nfs_unlock(vp); 976 return (error); 977 } 978 979 /* 980 * nfs statfs call 981 * (Actually a vfsop, not a vnode op) 982 */ 983 nfs_statfs(mp, sbp) 984 struct mount *mp; 985 register struct statfs *sbp; 986 { 987 register struct nfsv2_statfs *sfp; 988 nfsm_vars; 989 struct nfsmount *nmp; 990 struct ucred *cred; 991 struct nfsnode *np; 992 struct vnode *vp; 993 994 nmp = vfs_to_nfs(mp); 995 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 996 return (error); 997 vp = NFSTOV(np); 998 nfsstats.rpccnt[NFSPROC_STATFS]++; 999 cred = crget(); 1000 cred->cr_ngroups = 1; 1001 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1002 nfsm_fhtom(vp); 1003 nfsm_request(vp); 1004 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1005 sbp->f_type = MOUNT_NFS; 1006 sbp->f_flags = nmp->nm_flag; 1007 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1008 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1009 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1010 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1011 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1012 sbp->f_files = 0; 1013 sbp->f_ffree = 0; 1014 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1015 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1016 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1017 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1018 nfsm_reqdone; 1019 nfs_nput(vp); 1020 crfree(cred); 1021 return (error); 1022 } 1023 1024 #define HEXTOASC(x) "0123456789abcdef"[x] 1025 1026 /* 1027 * Silly rename. To make the NFS filesystem that is stateless look a little 1028 * more like the "ufs" a remove of an active vnode is translated to a rename 1029 * to a funny looking filename that is removed by nfs_inactive on the 1030 * nfsnode. There is the potential for another process on a different client 1031 * to create the same funny name between the nfs_lookitup() fails and the 1032 * nfs_rename() completes, but... 1033 */ 1034 nfs_sillyrename(ndp, flag) 1035 struct nameidata *ndp; 1036 int flag; 1037 { 1038 register struct nfsnode *np; 1039 register struct sillyrename *sp; 1040 register struct nameidata *tndp; 1041 int error; 1042 short pid; 1043 1044 np = VTONFS(ndp->ni_dvp); 1045 cache_purge(ndp->ni_dvp); 1046 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1047 M_TEMP, M_WAITOK); 1048 sp->s_flag = flag; 1049 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1050 np = VTONFS(ndp->ni_vp); 1051 tndp = &sp->s_namei; 1052 tndp->ni_cred = crdup(ndp->ni_cred); 1053 1054 /* Fudge together a funny name */ 1055 pid = u.u_procp->p_pid; 1056 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1057 tndp->ni_dent.d_namlen = 12; 1058 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1059 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1060 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1061 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1062 1063 /* Try lookitups until we get one that isn't there */ 1064 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1065 tndp->ni_dent.d_name[4]++; 1066 if (tndp->ni_dent.d_name[4] > 'z') { 1067 error = EINVAL; 1068 goto bad; 1069 } 1070 } 1071 if (error = nfs_renameit(ndp, tndp)) 1072 goto bad; 1073 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1074 np->n_sillyrename = sp; 1075 return (0); 1076 bad: 1077 crfree(tndp->ni_cred); 1078 free((caddr_t)sp, M_TEMP); 1079 return (error); 1080 } 1081 1082 /* 1083 * Look up a file name for silly rename stuff. 1084 * Just like nfs_lookup() except that it doesn't load returned values 1085 * into the nfsnode table. 1086 * If fhp != NULL it copies the returned file handle out 1087 */ 1088 nfs_lookitup(vp, ndp, fhp) 1089 register struct vnode *vp; 1090 register struct nameidata *ndp; 1091 nfsv2fh_t *fhp; 1092 { 1093 nfsm_vars; 1094 long len; 1095 1096 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1097 ndp->ni_dvp = vp; 1098 ndp->ni_vp = NULL; 1099 len = ndp->ni_dent.d_namlen; 1100 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1101 nfsm_fhtom(vp); 1102 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1103 nfsm_request(vp); 1104 if (fhp != NULL) { 1105 nfsm_disect(cp, caddr_t, NFSX_FH); 1106 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1107 } 1108 nfsm_reqdone; 1109 return (error); 1110 } 1111 1112 /* 1113 * Kludge City.. 1114 * - make nfs_bmap() essentially a no-op that does no translation 1115 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1116 * after mapping the physical addresses into Kernel Virtual space in the 1117 * nfsiobuf area. 1118 * (Maybe I could use the process's page mapping, but I was concerned that 1119 * Kernel Write might not be enabled and also figured copyout() would do 1120 * a lot more work than bcopy() and also it currently happens in the 1121 * context of the swapper process (2). 1122 */ 1123 nfs_bmap(vp, bn, vpp, bnp) 1124 struct vnode *vp; 1125 daddr_t bn; 1126 struct vnode **vpp; 1127 daddr_t *bnp; 1128 { 1129 if (vpp != NULL) 1130 *vpp = vp; 1131 if (bnp != NULL) 1132 *bnp = bn * btodb(vp->v_mount->m_bsize); 1133 return (0); 1134 } 1135 1136 /* 1137 * Strategy routine for phys. i/o 1138 * If the biod's are running, queue a request 1139 * otherwise just call nfs_doio() to get it done 1140 */ 1141 nfs_strategy(bp) 1142 register struct buf *bp; 1143 { 1144 register struct buf *dp; 1145 register int i; 1146 struct proc *rp; 1147 int error = 0; 1148 int fnd = 0; 1149 1150 /* 1151 * If an i/o daemon is waiting 1152 * queue the request, wake it up and wait for completion 1153 * otherwise just do it ourselves 1154 */ 1155 for (i = 0; i < nfs_asyncdaemons; i++) { 1156 if (rp = nfs_iodwant[i]) { 1157 /* 1158 * Ensure that the async_daemon is still waiting here 1159 */ 1160 if (rp->p_stat != SSLEEP || 1161 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1162 nfs_iodwant[i] = (struct proc *)0; 1163 continue; 1164 } 1165 dp = &nfs_bqueue; 1166 if (dp->b_actf == NULL) { 1167 dp->b_actl = bp; 1168 bp->b_actf = dp; 1169 } else { 1170 dp->b_actf->b_actl = bp; 1171 bp->b_actf = dp->b_actf; 1172 } 1173 dp->b_actf = bp; 1174 bp->b_actl = dp; 1175 fnd++; 1176 nfs_iodwant[i] = (struct proc *)0; 1177 wakeup((caddr_t)&nfs_iodwant[i]); 1178 break; 1179 } 1180 } 1181 if (!fnd) 1182 error = nfs_doio(bp); 1183 return (error); 1184 } 1185 1186 /* 1187 * Fun and games with i/o 1188 * Essentially play ubasetup() and disk interrupt service routine by 1189 * mapping the data buffer into kernel virtual space and doing the 1190 * nfs read or write rpc's from it. 1191 * If the biod's are not running, this is just called from nfs_strategy(), 1192 * otherwise it is called by the biod's to do what would normally be 1193 * partially disk interrupt driven. 1194 */ 1195 nfs_doio(bp) 1196 register struct buf *bp; 1197 { 1198 register struct pte *pte, *ppte; 1199 register caddr_t vaddr; 1200 register struct uio *uiop; 1201 register struct vnode *vp; 1202 struct nfsnode *np; 1203 struct ucred *cr; 1204 int npf, npf2; 1205 int reg; 1206 caddr_t vbase; 1207 caddr_t addr; 1208 unsigned v; 1209 struct proc *rp; 1210 int o, error; 1211 int bcnt; 1212 off_t off; 1213 struct uio uio; 1214 struct iovec io; 1215 1216 vp = bp->b_vp; 1217 uiop = &uio; 1218 uiop->uio_iov = &io; 1219 uiop->uio_iovcnt = 1; 1220 uiop->uio_segflg = UIO_SYSSPACE; 1221 if (bp->b_flags & B_READ) { 1222 io.iov_len = uiop->uio_resid = bp->b_bcount; 1223 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1224 addr = bp->b_un.b_addr; 1225 bcnt = bp->b_bcount; 1226 } else { 1227 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1228 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1229 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1230 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1231 } 1232 /* 1233 * For phys i/o, map the b_addr into kernel virtual space using 1234 * the Nfsiomap pte's 1235 * Also, add a temporary b_rcred for reading using the process's uid 1236 * and a guess at a group 1237 */ 1238 if (bp->b_flags & B_PHYS) { 1239 VTONFS(vp)->n_flag |= NPAGEDON; 1240 bp->b_rcred = cr = crget(); 1241 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1242 cr->cr_uid = rp->p_uid; 1243 cr->cr_gid = 0; /* Anything ?? */ 1244 cr->cr_ngroups = 1; 1245 o = (int)addr & PGOFSET; 1246 npf2 = npf = btoc(bcnt + o); 1247 /* 1248 * Get some mapping page table entries 1249 */ 1250 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1251 nfsmap_want++; 1252 sleep((caddr_t)&nfsmap_want, PZERO-1); 1253 } 1254 reg--; 1255 /* I know it is always the else, but that may change someday */ 1256 if ((bp->b_flags & B_PHYS) == 0) 1257 pte = kvtopte(bp->b_un.b_addr); 1258 else if (bp->b_flags & B_PAGET) 1259 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1260 else { 1261 v = btop(bp->b_un.b_addr); 1262 if (bp->b_flags & B_UAREA) 1263 pte = &rp->p_addr[v]; 1264 else 1265 pte = vtopte(rp, v); 1266 } 1267 /* 1268 * Play vmaccess() but with the Nfsiomap page table 1269 */ 1270 ppte = &Nfsiomap[reg]; 1271 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1272 while (npf != 0) { 1273 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1274 #if defined(tahoe) 1275 mtpr(P1DC, vaddr); 1276 #endif 1277 ppte++; 1278 pte++; 1279 vaddr += NBPG; 1280 --npf; 1281 } 1282 io.iov_base = vbase+o; 1283 } else { 1284 io.iov_base = addr; 1285 } 1286 if (bp->b_flags & B_READ) { 1287 uiop->uio_rw = UIO_READ; 1288 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1289 } else { 1290 uiop->uio_rw = UIO_WRITE; 1291 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1292 if (error) { 1293 np = VTONFS(vp); 1294 np->n_error = error; 1295 np->n_flag |= NWRITEERR; 1296 } 1297 bp->b_dirtyoff = bp->b_dirtyend = 0; 1298 } 1299 if (error) 1300 bp->b_flags |= B_ERROR; 1301 bp->b_resid = uiop->uio_resid; 1302 /* 1303 * Release pte's used by physical i/o 1304 */ 1305 if (bp->b_flags & B_PHYS) { 1306 crfree(cr); 1307 rmfree(nfsmap, (long)npf2, (long)++reg); 1308 if (nfsmap_want) { 1309 nfsmap_want = 0; 1310 wakeup((caddr_t)&nfsmap_want); 1311 } 1312 } 1313 biodone(bp); 1314 return (error); 1315 } 1316 1317 /* 1318 * Flush all the blocks associated with a vnode. 1319 * Walk through the buffer pool and push any dirty pages 1320 * associated with the vnode. 1321 */ 1322 nfs_fsync(vp, fflags, cred) 1323 register struct vnode *vp; 1324 int fflags; 1325 struct ucred *cred; 1326 { 1327 register struct nfsnode *np = VTONFS(vp); 1328 int error; 1329 1330 nfs_lock(vp); 1331 if (np->n_flag & NMODIFIED) { 1332 np->n_flag &= ~NMODIFIED; 1333 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1334 } 1335 nfs_unlock(vp); 1336 return (error); 1337 } 1338