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