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 7.9 (Berkeley) 10/24/89 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 nfs_reclaim(); 88 89 struct vnodeops nfsv2_vnodeops = { 90 nfs_lookup, 91 nfs_create, 92 vfs_noop, 93 nfs_open, 94 nfs_close, 95 nfs_access, 96 nfs_getattr, 97 nfs_setattr, 98 nfs_read, 99 nfs_write, 100 vfs_noop, 101 vfs_noop, 102 vfs_noop, 103 nfs_fsync, 104 vfs_noop, 105 nfs_remove, 106 nfs_link, 107 nfs_rename, 108 nfs_mkdir, 109 nfs_rmdir, 110 nfs_symlink, 111 nfs_readdir, 112 nfs_readlink, 113 nfs_abortop, 114 nfs_inactive, 115 nfs_reclaim, 116 nfs_lock, 117 nfs_unlock, 118 nfs_bmap, 119 nfs_strategy, 120 }; 121 122 /* Special device vnode ops */ 123 int blk_lookup(), 124 blk_open(), 125 blk_read(), 126 blk_write(), 127 blk_ioctl(), 128 blk_select(); 129 130 struct vnodeops nfsv2chr_vnodeops = { 131 blk_lookup, 132 vfs_noop, 133 vfs_noop, 134 blk_open, 135 nfs_close, 136 nfs_access, 137 nfs_getattr, 138 nfs_setattr, 139 blk_read, 140 blk_write, 141 blk_ioctl, 142 blk_select, 143 vfs_noop, 144 vfs_nullop, 145 vfs_noop, 146 nfs_remove, 147 nfs_link, 148 nfs_rename, 149 vfs_noop, 150 vfs_noop, 151 nfs_symlink, 152 vfs_noop, 153 vfs_noop, 154 nfs_abortop, 155 nfs_inactive, 156 nfs_reclaim, 157 nfs_lock, 158 nfs_unlock, 159 vfs_noop, 160 vfs_noop, 161 }; 162 163 extern u_long nfs_procids[NFS_NPROCS]; 164 extern u_long nfs_prog, nfs_vers; 165 extern char nfsiobuf[MAXPHYS+NBPG]; 166 struct map nfsmap[NFS_MSIZ]; 167 enum vtype v_type[NFLNK+1]; 168 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 169 int nfs_asyncdaemons = 0; 170 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 171 static int nfsmap_want = 0; 172 173 /* 174 * nfs null call from vfs. 175 */ 176 nfs_null(vp, cred) 177 struct vnode *vp; 178 struct ucred *cred; 179 { 180 nfsm_vars; 181 182 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 183 nfsm_request(vp); 184 nfsm_reqdone; 185 return (error); 186 } 187 188 /* 189 * nfs access vnode op. 190 * Essentially just get vattr and then imitate iaccess() 191 */ 192 nfs_access(vp, mode, cred) 193 struct vnode *vp; 194 int mode; 195 register struct ucred *cred; 196 { 197 register struct vattr *vap; 198 register gid_t *gp; 199 struct vattr vattr; 200 register int i; 201 int error; 202 203 /* 204 * If you're the super-user, 205 * you always get access. 206 */ 207 if (cred->cr_uid == 0) 208 return (0); 209 vap = &vattr; 210 if (error = nfs_getattr(vp, vap, cred)) 211 return (error); 212 /* 213 * Access check is based on only one of owner, group, public. 214 * If not owner, then check group. If not a member of the 215 * group, then check public access. 216 */ 217 if (cred->cr_uid != vap->va_uid) { 218 mode >>= 3; 219 gp = cred->cr_groups; 220 for (i = 0; i < cred->cr_ngroups; i++, gp++) 221 if (vap->va_gid == *gp) 222 goto found; 223 mode >>= 3; 224 found: 225 ; 226 } 227 if ((vap->va_mode & mode) != 0) 228 return (0); 229 return (EACCES); 230 } 231 232 /* 233 * nfs open vnode op 234 * Just check to see if the type is ok 235 */ 236 nfs_open(vp, mode, cred) 237 struct vnode *vp; 238 int mode; 239 struct ucred *cred; 240 { 241 register enum vtype vtyp; 242 243 vtyp = vp->v_type; 244 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 245 return (0); 246 else 247 return (EACCES); 248 } 249 250 /* 251 * nfs close vnode op 252 * For reg files, invalidate any buffer cache entries. 253 * For VCHR, do the device close 254 */ 255 nfs_close(vp, fflags, cred) 256 register struct vnode *vp; 257 int fflags; 258 struct ucred *cred; 259 { 260 struct nfsnode *np = VTONFS(vp); 261 dev_t dev; 262 int error = 0; 263 264 nfs_lock(vp); 265 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 266 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 267 np->n_flag &= ~(NMODIFIED|NBUFFERED); 268 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 269 if (np->n_flag & NWRITEERR) { 270 np->n_flag &= ~NWRITEERR; 271 if (!error) 272 error = np->n_error ? np->n_error : EIO; 273 } 274 } 275 nfs_unlock(vp); 276 if (vp->v_type != VCHR || vp->v_count > 1) 277 return (error); 278 dev = vp->v_rdev; 279 /* XXX what is this doing below the vnode op call */ 280 if (setjmp(&u.u_qsave)) { 281 /* 282 * If device close routine is interrupted, 283 * must return so closef can clean up. 284 */ 285 error = EINTR; 286 } else 287 error = (*cdevsw[major(dev)].d_close)(dev, fflags, IFCHR); 288 /* 289 * Most device close routines don't return errors, 290 * and dup2() doesn't work right on error. 291 */ 292 error = 0; /* XXX */ 293 return (error); 294 } 295 296 /* 297 * nfs getattr call from vfs. 298 */ 299 nfs_getattr(vp, vap, cred) 300 struct vnode *vp; 301 register struct vattr *vap; 302 struct ucred *cred; 303 { 304 nfsm_vars; 305 306 /* First look in the cache.. */ 307 if (nfs_getattrcache(vp, vap) == 0) 308 return (0); 309 nfsstats.rpccnt[NFSPROC_GETATTR]++; 310 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 311 nfsm_fhtom(vp); 312 nfsm_request(vp); 313 nfsm_loadattr(vp, vap); 314 nfsm_reqdone; 315 return (error); 316 } 317 318 /* 319 * nfs setattr call. 320 */ 321 nfs_setattr(vp, vap, cred) 322 struct vnode *vp; 323 register struct vattr *vap; 324 struct ucred *cred; 325 { 326 register struct nfsv2_sattr *sp; 327 nfsm_vars; 328 struct nfsnode *np; 329 330 nfsstats.rpccnt[NFSPROC_SETATTR]++; 331 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 332 nfsm_fhtom(vp); 333 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 334 if (vap->va_mode == 0xffff) 335 sp->sa_mode = VNOVAL; 336 else 337 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 338 if (vap->va_uid == 0xffff) 339 sp->sa_uid = VNOVAL; 340 else 341 sp->sa_uid = txdr_unsigned(vap->va_uid); 342 if (vap->va_gid == 0xffff) 343 sp->sa_gid = VNOVAL; 344 else 345 sp->sa_gid = txdr_unsigned(vap->va_gid); 346 sp->sa_size = txdr_unsigned(vap->va_size); 347 if (vap->va_size != VNOVAL) { 348 np = VTONFS(vp); 349 if (np->n_flag & NMODIFIED) { 350 np->n_flag &= ~NMODIFIED; 351 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 352 } 353 } 354 txdr_time(&vap->va_atime, &sp->sa_atime); 355 txdr_time(&vap->va_mtime, &sp->sa_mtime); 356 nfsm_request(vp); 357 nfsm_loadattr(vp, (struct vattr *)0); 358 /* should we fill in any vap fields ?? */ 359 nfsm_reqdone; 360 return (error); 361 } 362 363 /* 364 * nfs lookup call, one step at a time... 365 * First look in cache 366 * If not found, unlock the directory nfsnode and do the rpc 367 */ 368 nfs_lookup(vp, ndp) 369 register struct vnode *vp; 370 register struct nameidata *ndp; 371 { 372 register struct vnode *vdp; 373 nfsm_vars; 374 struct vnode *newvp; 375 long len; 376 nfsv2fh_t *fhp; 377 struct nfsnode *np; 378 int lockparent, wantparent, flag; 379 dev_t rdev; 380 381 ndp->ni_dvp = vp; 382 ndp->ni_vp = NULL; 383 if (vp->v_type != VDIR) 384 return (ENOTDIR); 385 lockparent = ndp->ni_nameiop & LOCKPARENT; 386 flag = ndp->ni_nameiop & OPFLAG; 387 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 388 if ((error = cache_lookup(ndp)) && error != ENOENT) { 389 struct vattr vattr; 390 int vpid; 391 392 if (ndp->ni_vp == ndp->ni_rdir && ndp->ni_isdotdot) 393 vdp = vp; 394 else 395 vdp = ndp->ni_vp; 396 vpid = vdp->v_id; 397 /* 398 * See the comment starting `Step through' in ufs/ufs_lookup.c 399 * for an explanation of the locking protocol 400 */ 401 if (vp == vdp) { 402 VREF(vdp); 403 } else if (ndp->ni_isdotdot) { 404 nfs_unlock(vp); 405 nfs_ngrab(VTONFS(vdp)); 406 } else { 407 nfs_ngrab(VTONFS(vdp)); 408 nfs_unlock(vp); 409 } 410 if (vpid == vdp->v_id && 411 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 412 nfsstats.lookupcache_hits++; 413 return (0); 414 } 415 nfs_nput(vdp); 416 nfs_lock(vp); 417 ndp->ni_vp = (struct vnode *)0; 418 } 419 error = 0; 420 nfsstats.lookupcache_misses++; 421 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 422 len = ndp->ni_namelen; 423 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 424 nfsm_fhtom(vp); 425 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 426 nfsm_request(vp); 427 nfsmout: 428 if (error) { 429 if ((flag == CREATE || flag == RENAME) && 430 *ndp->ni_next == 0) { 431 if (!lockparent) 432 nfs_unlock(vp); 433 } 434 return (ENOENT); 435 } 436 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 437 438 /* 439 * Handle DELETE and RENAME cases... 440 */ 441 if (flag == DELETE && *ndp->ni_next == 0) { 442 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 443 VREF(vp); 444 newvp = vp; 445 np = VTONFS(vp); 446 } else { 447 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 448 m_freem(mrep); 449 return (error); 450 } 451 newvp = NFSTOV(np); 452 } 453 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 454 if (newvp != vp) 455 nfs_nput(newvp); 456 else 457 vrele(vp); 458 m_freem(mrep); 459 return (error); 460 } 461 ndp->ni_vp = newvp; 462 if (!lockparent) 463 nfs_unlock(vp); 464 m_freem(mrep); 465 return (0); 466 } 467 468 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 469 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 470 m_freem(mrep); 471 return (EISDIR); 472 } 473 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 474 m_freem(mrep); 475 return (error); 476 } 477 newvp = NFSTOV(np); 478 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 479 nfs_nput(newvp); 480 m_freem(mrep); 481 return (error); 482 } 483 ndp->ni_vp = newvp; 484 if (!lockparent) 485 nfs_unlock(vp); 486 return (0); 487 } 488 489 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 490 VREF(vp); 491 newvp = vp; 492 np = VTONFS(vp); 493 } else if (ndp->ni_isdotdot) { 494 nfs_unlock(vp); 495 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 496 nfs_lock(vp); 497 m_freem(mrep); 498 return (error); 499 } 500 nfs_lock(vp); 501 newvp = NFSTOV(np); 502 } else { 503 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 504 m_freem(mrep); 505 return (error); 506 } 507 newvp = NFSTOV(np); 508 } 509 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 510 if (newvp != vp) 511 nfs_nput(newvp); 512 else 513 vrele(vp); 514 m_freem(mrep); 515 return (error); 516 } 517 m_freem(mrep); 518 519 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 520 nfs_unlock(vp); 521 ndp->ni_vp = newvp; 522 if (error == 0 && ndp->ni_makeentry) 523 cache_enter(ndp); 524 return (error); 525 } 526 527 /* 528 * nfs readlink call 529 */ 530 nfs_readlink(vp, uiop, cred) 531 struct vnode *vp; 532 struct uio *uiop; 533 struct ucred *cred; 534 { 535 nfsm_vars; 536 long len; 537 538 nfsstats.rpccnt[NFSPROC_READLINK]++; 539 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 540 nfsm_fhtom(vp); 541 nfsm_request(vp); 542 nfsm_strsiz(len, NFS_MAXPATHLEN); 543 nfsm_mtouio(uiop, len); 544 nfsm_reqdone; 545 return (error); 546 } 547 548 /* 549 * nfs read call 550 */ 551 nfs_readrpc(vp, uiop, offp, cred) 552 struct vnode *vp; 553 struct uio *uiop; 554 off_t *offp; 555 struct ucred *cred; 556 { 557 nfsm_vars; 558 struct nfsmount *nmp; 559 long len, retlen, tsiz; 560 561 nmp = vfs_to_nfs(vp->v_mount); 562 tsiz = uiop->uio_resid; 563 while (tsiz > 0) { 564 nfsstats.rpccnt[NFSPROC_READ]++; 565 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 566 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 567 nfsm_fhtom(vp); 568 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 569 *p++ = txdr_unsigned(*offp); 570 *p++ = txdr_unsigned(len); 571 *p = 0; 572 nfsm_request(vp); 573 nfsm_loadattr(vp, (struct vattr *)0); 574 nfsm_strsiz(retlen, nmp->nm_rsize); 575 nfsm_mtouio(uiop, retlen); 576 m_freem(mrep); 577 *offp += retlen; 578 if (retlen < len) 579 tsiz = 0; 580 else 581 tsiz -= len; 582 } 583 nfsmout: 584 return (error); 585 } 586 587 /* 588 * nfs write call 589 */ 590 nfs_writerpc(vp, uiop, offp, cred) 591 struct vnode *vp; 592 struct uio *uiop; 593 off_t *offp; 594 struct ucred *cred; 595 { 596 nfsm_vars; 597 struct nfsmount *nmp; 598 long len, tsiz; 599 600 nmp = vfs_to_nfs(vp->v_mount); 601 tsiz = uiop->uio_resid; 602 while (tsiz > 0) { 603 nfsstats.rpccnt[NFSPROC_WRITE]++; 604 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 605 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 606 NFSX_FH+NFSX_UNSIGNED*4); 607 nfsm_fhtom(vp); 608 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 609 *(p+1) = txdr_unsigned(*offp); 610 *(p+3) = txdr_unsigned(len); 611 nfsm_uiotom(uiop, len); 612 nfsm_request(vp); 613 nfsm_loadattr(vp, (struct vattr *)0); 614 m_freem(mrep); 615 tsiz -= len; 616 *offp += len; 617 } 618 nfsmout: 619 return (error); 620 } 621 622 /* 623 * nfs file create call 624 */ 625 nfs_create(ndp, vap) 626 register struct nameidata *ndp; 627 register struct vattr *vap; 628 { 629 register struct nfsv2_sattr *sp; 630 nfsm_vars; 631 632 nfsstats.rpccnt[NFSPROC_CREATE]++; 633 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 634 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 635 nfsm_fhtom(ndp->ni_dvp); 636 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 637 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 638 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 639 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 640 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 641 sp->sa_size = txdr_unsigned(0); 642 /* or should these be VNOVAL ?? */ 643 txdr_time(&vap->va_atime, &sp->sa_atime); 644 txdr_time(&vap->va_mtime, &sp->sa_mtime); 645 nfsm_request(ndp->ni_dvp); 646 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 647 nfsm_reqdone; 648 nfs_nput(ndp->ni_dvp); 649 return (error); 650 } 651 652 /* 653 * nfs file remove call 654 * To try and make nfs semantics closer to vfs semantics, a file that has 655 * other references to the vnode is renamed instead of removed and then 656 * removed later on the last close. 657 * Unfortunately you must flush the buffer cache and cmap to get rid of 658 * all extraneous vnode references before you check the reference cnt. 659 * 1 - If the file could have blocks in the buffer cache 660 * flush them out and invalidate them 661 * mpurge the vnode to flush out cmap references 662 * (This is necessary to update the vnode ref cnt as well as sensible 663 * for actual removes, to free up the buffers) 664 * 2 - If v_count > 1 665 * If a rename is not already in the works 666 * call nfs_sillyrename() to set it up 667 * else 668 * do the remove rpc 669 */ 670 nfs_remove(ndp) 671 register struct nameidata *ndp; 672 { 673 register struct vnode *vp = ndp->ni_vp; 674 register struct nfsnode *np = VTONFS(ndp->ni_vp); 675 nfsm_vars; 676 677 if (vp->v_type == VREG) { 678 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 679 np->n_flag &= ~(NMODIFIED|NBUFFERED); 680 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 681 } 682 if (np->n_flag & NPAGEDON) 683 mpurge(vp); /* In case cmap entries still ref it */ 684 } 685 if (vp->v_count > 1) { 686 if (!np->n_sillyrename) 687 error = nfs_sillyrename(ndp, REMOVE); 688 } else { 689 nfsstats.rpccnt[NFSPROC_REMOVE]++; 690 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 691 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 692 nfsm_fhtom(ndp->ni_dvp); 693 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 694 nfsm_request(ndp->ni_dvp); 695 nfsm_reqdone; 696 } 697 if (ndp->ni_dvp == ndp->ni_vp) 698 vrele(ndp->ni_vp); 699 else 700 nfs_nput(ndp->ni_vp); 701 nfs_nput(ndp->ni_dvp); 702 return (error); 703 } 704 705 /* 706 * nfs file remove rpc called from nfs_inactive 707 */ 708 nfs_removeit(ndp) 709 register struct nameidata *ndp; 710 { 711 nfsm_vars; 712 713 nfsstats.rpccnt[NFSPROC_REMOVE]++; 714 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 715 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 716 nfsm_fhtom(ndp->ni_dvp); 717 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 718 nfsm_request(ndp->ni_dvp); 719 nfsm_reqdone; 720 return (error); 721 } 722 723 /* 724 * nfs file rename call 725 */ 726 nfs_rename(sndp, tndp) 727 register struct nameidata *sndp, *tndp; 728 { 729 nfsm_vars; 730 731 nfsstats.rpccnt[NFSPROC_RENAME]++; 732 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 733 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 734 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 735 nfsm_fhtom(sndp->ni_dvp); 736 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 737 nfsm_fhtom(tndp->ni_dvp); 738 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 739 nfsm_request(sndp->ni_dvp); 740 nfsm_reqdone; 741 if (sndp->ni_vp->v_type == VDIR) { 742 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 743 cache_purge(tndp->ni_dvp); 744 cache_purge(sndp->ni_dvp); 745 } 746 nfs_abortop(sndp); 747 nfs_abortop(tndp); 748 return (error); 749 } 750 751 /* 752 * nfs file rename rpc called from above 753 */ 754 nfs_renameit(sndp, tndp) 755 register struct nameidata *sndp, *tndp; 756 { 757 nfsm_vars; 758 759 nfsstats.rpccnt[NFSPROC_RENAME]++; 760 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 761 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 762 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 763 nfsm_fhtom(sndp->ni_dvp); 764 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 765 nfsm_fhtom(tndp->ni_dvp); 766 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 767 nfsm_request(sndp->ni_dvp); 768 nfsm_reqdone; 769 return (error); 770 } 771 772 /* 773 * nfs hard link create call 774 */ 775 nfs_link(vp, ndp) 776 struct vnode *vp; 777 register struct nameidata *ndp; 778 { 779 nfsm_vars; 780 781 if (ndp->ni_dvp != vp) 782 nfs_lock(vp); 783 nfsstats.rpccnt[NFSPROC_LINK]++; 784 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 785 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 786 nfsm_fhtom(vp); 787 nfsm_fhtom(ndp->ni_dvp); 788 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 789 nfsm_request(vp); 790 nfsm_reqdone; 791 if (ndp->ni_dvp != vp) 792 nfs_unlock(vp); 793 nfs_nput(ndp->ni_dvp); 794 return (error); 795 } 796 797 /* 798 * nfs symbolic link create call 799 */ 800 nfs_symlink(ndp, vap, nm) 801 struct nameidata *ndp; 802 struct vattr *vap; 803 char *nm; /* is this the path ?? */ 804 { 805 register struct nfsv2_sattr *sp; 806 nfsm_vars; 807 808 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 809 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 810 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 811 nfsm_fhtom(ndp->ni_dvp); 812 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 813 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 814 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 815 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 816 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 817 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 818 sp->sa_size = txdr_unsigned(VNOVAL); 819 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 820 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 821 nfsm_request(ndp->ni_dvp); 822 nfsm_reqdone; 823 nfs_nput(ndp->ni_dvp); 824 return (error); 825 } 826 827 /* 828 * nfs make dir call 829 */ 830 nfs_mkdir(ndp, vap) 831 struct nameidata *ndp; 832 struct vattr *vap; 833 { 834 register struct nfsv2_sattr *sp; 835 nfsm_vars; 836 837 nfsstats.rpccnt[NFSPROC_MKDIR]++; 838 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 839 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 840 nfsm_fhtom(ndp->ni_dvp); 841 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 842 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 843 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 844 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 845 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 846 sp->sa_size = txdr_unsigned(VNOVAL); 847 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 848 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 849 nfsm_request(ndp->ni_dvp); 850 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 851 nfsm_reqdone; 852 nfs_nput(ndp->ni_dvp); 853 return (error); 854 } 855 856 /* 857 * nfs remove directory call 858 */ 859 nfs_rmdir(ndp) 860 register struct nameidata *ndp; 861 { 862 nfsm_vars; 863 864 if (ndp->ni_dvp == ndp->ni_vp) { 865 vrele(ndp->ni_dvp); 866 nfs_nput(ndp->ni_dvp); 867 return (EINVAL); 868 } 869 nfsstats.rpccnt[NFSPROC_RMDIR]++; 870 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 871 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 872 nfsm_fhtom(ndp->ni_dvp); 873 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 874 nfsm_request(ndp->ni_dvp); 875 nfsm_reqdone; 876 cache_purge(ndp->ni_dvp); 877 cache_purge(ndp->ni_vp); 878 nfs_nput(ndp->ni_vp); 879 nfs_nput(ndp->ni_dvp); 880 return (error); 881 } 882 883 /* 884 * nfs readdir call 885 * Although cookie is defined as opaque, I translate it to/from net byte 886 * order so that it looks more sensible. This appears consistent with the 887 * Ultrix implementation of NFS. 888 */ 889 nfs_readdir(vp, uiop, offp, cred) 890 struct vnode *vp; 891 struct uio *uiop; 892 off_t *offp; 893 struct ucred *cred; 894 { 895 register long len; 896 register struct direct *dp; 897 nfsm_vars; 898 struct mbuf *md2; 899 caddr_t dpos2; 900 int siz; 901 int more_dirs, eofflg; 902 off_t off, savoff; 903 struct direct *savdp; 904 905 nfs_lock(vp); 906 nfsstats.rpccnt[NFSPROC_READDIR]++; 907 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 908 nfsm_fhtom(vp); 909 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 910 off = *offp; 911 *p++ = txdr_unsigned(off); 912 *p = txdr_unsigned(uiop->uio_resid); 913 nfsm_request(vp); 914 siz = 0; 915 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 916 more_dirs = fxdr_unsigned(int, *p); 917 918 /* Save the position so that we can do nfsm_mtouio() later */ 919 dpos2 = dpos; 920 md2 = md; 921 922 /* loop thru the dir entries, doctoring them to 4bsd form */ 923 while (more_dirs && siz < uiop->uio_resid) { 924 savoff = off; /* Hold onto offset and dp */ 925 savdp = dp; 926 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 927 dp = (struct direct *)p; 928 dp->d_ino = fxdr_unsigned(u_long, *p++); 929 len = fxdr_unsigned(int, *p); 930 if (len <= 0 || len > NFS_MAXNAMLEN) { 931 error = EBADRPC; 932 m_freem(mrep); 933 goto nfsmout; 934 } 935 dp->d_namlen = (u_short)len; 936 len = nfsm_rndup(len); 937 nfsm_adv(len); 938 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 939 off = fxdr_unsigned(off_t, *p); 940 *p++ = 0; /* Ensures null termination of name */ 941 more_dirs = fxdr_unsigned(int, *p); 942 dp->d_reclen = len+4*NFSX_UNSIGNED; 943 siz += dp->d_reclen; 944 } 945 /* 946 * If at end of rpc data, get the eof boolean 947 */ 948 if (!more_dirs) { 949 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 950 eofflg = fxdr_unsigned(long, *p); 951 } 952 /* 953 * If there is too much to fit in the data buffer, use savoff and 954 * savdp to trim off the last record. 955 * --> we are not at eof 956 */ 957 if (siz > uiop->uio_resid) { 958 eofflg = FALSE; 959 off = savoff; 960 siz -= dp->d_reclen; 961 dp = savdp; 962 } 963 if (siz > 0) { 964 #ifdef notdef 965 if (!eofflg) 966 dp->d_reclen += (uiop->uio_resid-siz); 967 #endif 968 md = md2; 969 dpos = dpos2; 970 nfsm_mtouio(uiop, siz); 971 #ifdef notdef 972 if (!eofflg) 973 uiop->uio_resid = 0; 974 #endif 975 *offp = off; 976 } 977 nfsm_reqdone; 978 nfs_unlock(vp); 979 return (error); 980 } 981 982 /* 983 * nfs statfs call 984 * (Actually a vfsop, not a vnode op) 985 */ 986 nfs_statfs(mp, sbp) 987 struct mount *mp; 988 register struct statfs *sbp; 989 { 990 register struct nfsv2_statfs *sfp; 991 nfsm_vars; 992 struct nfsmount *nmp; 993 struct ucred *cred; 994 struct nfsnode *np; 995 struct vnode *vp; 996 997 nmp = vfs_to_nfs(mp); 998 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 999 return (error); 1000 vp = NFSTOV(np); 1001 nfsstats.rpccnt[NFSPROC_STATFS]++; 1002 cred = crget(); 1003 cred->cr_ngroups = 1; 1004 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1005 nfsm_fhtom(vp); 1006 nfsm_request(vp); 1007 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1008 sbp->f_type = MOUNT_NFS; 1009 sbp->f_flags = nmp->nm_flag; 1010 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1011 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1012 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1013 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1014 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1015 sbp->f_files = 0; 1016 sbp->f_ffree = 0; 1017 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1018 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1019 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1020 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1021 nfsm_reqdone; 1022 nfs_nput(vp); 1023 crfree(cred); 1024 return (error); 1025 } 1026 1027 #define HEXTOASC(x) "0123456789abcdef"[x] 1028 1029 /* 1030 * Silly rename. To make the NFS filesystem that is stateless look a little 1031 * more like the "ufs" a remove of an active vnode is translated to a rename 1032 * to a funny looking filename that is removed by nfs_inactive on the 1033 * nfsnode. There is the potential for another process on a different client 1034 * to create the same funny name between the nfs_lookitup() fails and the 1035 * nfs_rename() completes, but... 1036 */ 1037 nfs_sillyrename(ndp, flag) 1038 struct nameidata *ndp; 1039 int flag; 1040 { 1041 register struct nfsnode *np; 1042 register struct sillyrename *sp; 1043 register struct nameidata *tndp; 1044 int error; 1045 short pid; 1046 1047 np = VTONFS(ndp->ni_dvp); 1048 cache_purge(ndp->ni_dvp); 1049 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1050 M_TEMP, M_WAITOK); 1051 sp->s_flag = flag; 1052 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1053 np = VTONFS(ndp->ni_vp); 1054 tndp = &sp->s_namei; 1055 tndp->ni_cred = crdup(ndp->ni_cred); 1056 1057 /* Fudge together a funny name */ 1058 pid = u.u_procp->p_pid; 1059 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1060 tndp->ni_dent.d_namlen = 12; 1061 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1062 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1063 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1064 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1065 1066 /* Try lookitups until we get one that isn't there */ 1067 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1068 tndp->ni_dent.d_name[4]++; 1069 if (tndp->ni_dent.d_name[4] > 'z') { 1070 error = EINVAL; 1071 goto bad; 1072 } 1073 } 1074 if (error = nfs_renameit(ndp, tndp)) 1075 goto bad; 1076 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1077 np->n_sillyrename = sp; 1078 return (0); 1079 bad: 1080 crfree(tndp->ni_cred); 1081 free((caddr_t)sp, M_TEMP); 1082 return (error); 1083 } 1084 1085 /* 1086 * Look up a file name for silly rename stuff. 1087 * Just like nfs_lookup() except that it doesn't load returned values 1088 * into the nfsnode table. 1089 * If fhp != NULL it copies the returned file handle out 1090 */ 1091 nfs_lookitup(vp, ndp, fhp) 1092 register struct vnode *vp; 1093 register struct nameidata *ndp; 1094 nfsv2fh_t *fhp; 1095 { 1096 nfsm_vars; 1097 long len; 1098 1099 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1100 ndp->ni_dvp = vp; 1101 ndp->ni_vp = NULL; 1102 len = ndp->ni_dent.d_namlen; 1103 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1104 nfsm_fhtom(vp); 1105 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1106 nfsm_request(vp); 1107 if (fhp != NULL) { 1108 nfsm_disect(cp, caddr_t, NFSX_FH); 1109 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1110 } 1111 nfsm_reqdone; 1112 return (error); 1113 } 1114 1115 /* 1116 * Kludge City.. 1117 * - make nfs_bmap() essentially a no-op that does no translation 1118 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1119 * after mapping the physical addresses into Kernel Virtual space in the 1120 * nfsiobuf area. 1121 * (Maybe I could use the process's page mapping, but I was concerned that 1122 * Kernel Write might not be enabled and also figured copyout() would do 1123 * a lot more work than bcopy() and also it currently happens in the 1124 * context of the swapper process (2). 1125 */ 1126 nfs_bmap(vp, bn, vpp, bnp) 1127 struct vnode *vp; 1128 daddr_t bn; 1129 struct vnode **vpp; 1130 daddr_t *bnp; 1131 { 1132 if (vpp != NULL) 1133 *vpp = vp; 1134 if (bnp != NULL) 1135 *bnp = bn * btodb(vp->v_mount->m_bsize); 1136 return (0); 1137 } 1138 1139 /* 1140 * Strategy routine for phys. i/o 1141 * If the biod's are running, queue a request 1142 * otherwise just call nfs_doio() to get it done 1143 */ 1144 nfs_strategy(bp) 1145 register struct buf *bp; 1146 { 1147 register struct buf *dp; 1148 register int i; 1149 struct proc *rp; 1150 int error = 0; 1151 int fnd = 0; 1152 1153 /* 1154 * If an i/o daemon is waiting 1155 * queue the request, wake it up and wait for completion 1156 * otherwise just do it ourselves 1157 */ 1158 for (i = 0; i < nfs_asyncdaemons; i++) { 1159 if (rp = nfs_iodwant[i]) { 1160 /* 1161 * Ensure that the async_daemon is still waiting here 1162 */ 1163 if (rp->p_stat != SSLEEP || 1164 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1165 nfs_iodwant[i] = (struct proc *)0; 1166 continue; 1167 } 1168 dp = &nfs_bqueue; 1169 if (dp->b_actf == NULL) { 1170 dp->b_actl = bp; 1171 bp->b_actf = dp; 1172 } else { 1173 dp->b_actf->b_actl = bp; 1174 bp->b_actf = dp->b_actf; 1175 } 1176 dp->b_actf = bp; 1177 bp->b_actl = dp; 1178 fnd++; 1179 nfs_iodwant[i] = (struct proc *)0; 1180 wakeup((caddr_t)&nfs_iodwant[i]); 1181 break; 1182 } 1183 } 1184 if (!fnd) 1185 error = nfs_doio(bp); 1186 return (error); 1187 } 1188 1189 /* 1190 * Fun and games with i/o 1191 * Essentially play ubasetup() and disk interrupt service routine by 1192 * mapping the data buffer into kernel virtual space and doing the 1193 * nfs read or write rpc's from it. 1194 * If the biod's are not running, this is just called from nfs_strategy(), 1195 * otherwise it is called by the biod's to do what would normally be 1196 * partially disk interrupt driven. 1197 */ 1198 nfs_doio(bp) 1199 register struct buf *bp; 1200 { 1201 register struct pte *pte, *ppte; 1202 register caddr_t vaddr; 1203 register struct uio *uiop; 1204 register struct vnode *vp; 1205 struct nfsnode *np; 1206 struct ucred *cr; 1207 int npf, npf2; 1208 int reg; 1209 caddr_t vbase; 1210 caddr_t addr; 1211 unsigned v; 1212 struct proc *rp; 1213 int o, error; 1214 int bcnt; 1215 off_t off; 1216 struct uio uio; 1217 struct iovec io; 1218 1219 vp = bp->b_vp; 1220 uiop = &uio; 1221 uiop->uio_iov = &io; 1222 uiop->uio_iovcnt = 1; 1223 uiop->uio_segflg = UIO_SYSSPACE; 1224 if (bp->b_flags & B_READ) { 1225 io.iov_len = uiop->uio_resid = bp->b_bcount; 1226 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1227 addr = bp->b_un.b_addr; 1228 bcnt = bp->b_bcount; 1229 } else { 1230 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1231 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1232 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1233 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1234 } 1235 /* 1236 * For phys i/o, map the b_addr into kernel virtual space using 1237 * the Nfsiomap pte's 1238 * Also, add a temporary b_rcred for reading using the process's uid 1239 * and a guess at a group 1240 */ 1241 if (bp->b_flags & B_PHYS) { 1242 VTONFS(vp)->n_flag |= NPAGEDON; 1243 bp->b_rcred = cr = crget(); 1244 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1245 cr->cr_uid = rp->p_uid; 1246 cr->cr_gid = 0; /* Anything ?? */ 1247 cr->cr_ngroups = 1; 1248 o = (int)addr & PGOFSET; 1249 npf2 = npf = btoc(bcnt + o); 1250 /* 1251 * Get some mapping page table entries 1252 */ 1253 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1254 nfsmap_want++; 1255 sleep((caddr_t)&nfsmap_want, PZERO-1); 1256 } 1257 reg--; 1258 /* I know it is always the else, but that may change someday */ 1259 if ((bp->b_flags & B_PHYS) == 0) 1260 pte = kvtopte(bp->b_un.b_addr); 1261 else if (bp->b_flags & B_PAGET) 1262 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1263 else { 1264 v = btop(bp->b_un.b_addr); 1265 if (bp->b_flags & B_UAREA) 1266 pte = &rp->p_addr[v]; 1267 else 1268 pte = vtopte(rp, v); 1269 } 1270 /* 1271 * Play vmaccess() but with the Nfsiomap page table 1272 */ 1273 ppte = &Nfsiomap[reg]; 1274 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1275 while (npf != 0) { 1276 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1277 #if defined(tahoe) 1278 mtpr(P1DC, vaddr); 1279 #endif 1280 ppte++; 1281 pte++; 1282 vaddr += NBPG; 1283 --npf; 1284 } 1285 io.iov_base = vbase+o; 1286 } else { 1287 io.iov_base = addr; 1288 } 1289 if (bp->b_flags & B_READ) { 1290 uiop->uio_rw = UIO_READ; 1291 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1292 } else { 1293 uiop->uio_rw = UIO_WRITE; 1294 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1295 if (error) { 1296 np = VTONFS(vp); 1297 np->n_error = error; 1298 np->n_flag |= NWRITEERR; 1299 } 1300 bp->b_dirtyoff = bp->b_dirtyend = 0; 1301 } 1302 if (error) 1303 bp->b_flags |= B_ERROR; 1304 bp->b_resid = uiop->uio_resid; 1305 /* 1306 * Release pte's used by physical i/o 1307 */ 1308 if (bp->b_flags & B_PHYS) { 1309 crfree(cr); 1310 rmfree(nfsmap, (long)npf2, (long)++reg); 1311 if (nfsmap_want) { 1312 nfsmap_want = 0; 1313 wakeup((caddr_t)&nfsmap_want); 1314 } 1315 } 1316 biodone(bp); 1317 return (error); 1318 } 1319 1320 /* 1321 * Flush all the blocks associated with a vnode. 1322 * Walk through the buffer pool and push any dirty pages 1323 * associated with the vnode. 1324 */ 1325 nfs_fsync(vp, fflags, cred) 1326 register struct vnode *vp; 1327 int fflags; 1328 struct ucred *cred; 1329 { 1330 register struct nfsnode *np = VTONFS(vp); 1331 int error; 1332 1333 nfs_lock(vp); 1334 if (np->n_flag & NMODIFIED) { 1335 np->n_flag &= ~NMODIFIED; 1336 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1337 } 1338 nfs_unlock(vp); 1339 return (error); 1340 } 1341