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 7.10 (Berkeley) 10/29/89 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 spec_lookup(), 124 spec_open(), 125 spec_read(), 126 spec_write(), 127 spec_strategy(), 128 spec_ioctl(), 129 spec_select(), 130 spec_close(), 131 spec_badop(), 132 spec_nullop(); 133 134 struct vnodeops spec_nfsv2nodeops = { 135 spec_lookup, 136 spec_badop, 137 spec_badop, 138 spec_open, 139 spec_close, 140 nfs_access, 141 nfs_getattr, 142 nfs_setattr, 143 spec_read, 144 spec_write, 145 spec_ioctl, 146 spec_select, 147 spec_badop, 148 spec_nullop, 149 spec_badop, 150 spec_badop, 151 spec_badop, 152 spec_badop, 153 spec_badop, 154 spec_badop, 155 spec_badop, 156 spec_badop, 157 spec_badop, 158 spec_badop, 159 nfs_inactive, 160 nfs_reclaim, 161 nfs_lock, 162 nfs_unlock, 163 spec_badop, 164 spec_strategy, 165 }; 166 167 extern u_long nfs_procids[NFS_NPROCS]; 168 extern u_long nfs_prog, nfs_vers; 169 extern char nfsiobuf[MAXPHYS+NBPG]; 170 struct map nfsmap[NFS_MSIZ]; 171 enum vtype v_type[NFLNK+1]; 172 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 173 int nfs_asyncdaemons = 0; 174 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 175 static int nfsmap_want = 0; 176 177 /* 178 * nfs null call from vfs. 179 */ 180 nfs_null(vp, cred) 181 struct vnode *vp; 182 struct ucred *cred; 183 { 184 nfsm_vars; 185 186 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 187 nfsm_request(vp); 188 nfsm_reqdone; 189 return (error); 190 } 191 192 /* 193 * nfs access vnode op. 194 * Essentially just get vattr and then imitate iaccess() 195 */ 196 nfs_access(vp, mode, cred) 197 struct vnode *vp; 198 int mode; 199 register struct ucred *cred; 200 { 201 register struct vattr *vap; 202 register gid_t *gp; 203 struct vattr vattr; 204 register int i; 205 int error; 206 207 /* 208 * If you're the super-user, 209 * you always get access. 210 */ 211 if (cred->cr_uid == 0) 212 return (0); 213 vap = &vattr; 214 if (error = nfs_getattr(vp, vap, cred)) 215 return (error); 216 /* 217 * Access check is based on only one of owner, group, public. 218 * If not owner, then check group. If not a member of the 219 * group, then check public access. 220 */ 221 if (cred->cr_uid != vap->va_uid) { 222 mode >>= 3; 223 gp = cred->cr_groups; 224 for (i = 0; i < cred->cr_ngroups; i++, gp++) 225 if (vap->va_gid == *gp) 226 goto found; 227 mode >>= 3; 228 found: 229 ; 230 } 231 if ((vap->va_mode & mode) != 0) 232 return (0); 233 return (EACCES); 234 } 235 236 /* 237 * nfs open vnode op 238 * Just check to see if the type is ok 239 */ 240 nfs_open(vp, mode, cred) 241 struct vnode *vp; 242 int mode; 243 struct ucred *cred; 244 { 245 register enum vtype vtyp; 246 247 vtyp = vp->v_type; 248 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 249 return (0); 250 else 251 return (EACCES); 252 } 253 254 /* 255 * nfs close vnode op 256 * For reg files, invalidate any buffer cache entries. 257 */ 258 nfs_close(vp, fflags, cred) 259 register struct vnode *vp; 260 int fflags; 261 struct ucred *cred; 262 { 263 struct nfsnode *np = VTONFS(vp); 264 dev_t dev; 265 int error = 0; 266 267 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 268 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 269 nfs_lock(vp); 270 np->n_flag &= ~(NMODIFIED|NBUFFERED); 271 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 272 if (np->n_flag & NWRITEERR) { 273 np->n_flag &= ~NWRITEERR; 274 if (!error) 275 error = np->n_error ? np->n_error : EIO; 276 } 277 nfs_unlock(vp); 278 } 279 return (error); 280 } 281 282 /* 283 * nfs getattr call from vfs. 284 */ 285 nfs_getattr(vp, vap, cred) 286 struct vnode *vp; 287 register struct vattr *vap; 288 struct ucred *cred; 289 { 290 nfsm_vars; 291 292 /* First look in the cache.. */ 293 if (nfs_getattrcache(vp, vap) == 0) 294 return (0); 295 nfsstats.rpccnt[NFSPROC_GETATTR]++; 296 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 297 nfsm_fhtom(vp); 298 nfsm_request(vp); 299 nfsm_loadattr(vp, vap); 300 nfsm_reqdone; 301 return (error); 302 } 303 304 /* 305 * nfs setattr call. 306 */ 307 nfs_setattr(vp, vap, cred) 308 struct vnode *vp; 309 register struct vattr *vap; 310 struct ucred *cred; 311 { 312 register struct nfsv2_sattr *sp; 313 nfsm_vars; 314 struct nfsnode *np; 315 316 nfsstats.rpccnt[NFSPROC_SETATTR]++; 317 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 318 nfsm_fhtom(vp); 319 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 320 if (vap->va_mode == 0xffff) 321 sp->sa_mode = VNOVAL; 322 else 323 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 324 if (vap->va_uid == 0xffff) 325 sp->sa_uid = VNOVAL; 326 else 327 sp->sa_uid = txdr_unsigned(vap->va_uid); 328 if (vap->va_gid == 0xffff) 329 sp->sa_gid = VNOVAL; 330 else 331 sp->sa_gid = txdr_unsigned(vap->va_gid); 332 sp->sa_size = txdr_unsigned(vap->va_size); 333 if (vap->va_size != VNOVAL) { 334 np = VTONFS(vp); 335 if (np->n_flag & NMODIFIED) { 336 np->n_flag &= ~NMODIFIED; 337 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 338 } 339 } 340 txdr_time(&vap->va_atime, &sp->sa_atime); 341 txdr_time(&vap->va_mtime, &sp->sa_mtime); 342 nfsm_request(vp); 343 nfsm_loadattr(vp, (struct vattr *)0); 344 /* should we fill in any vap fields ?? */ 345 nfsm_reqdone; 346 return (error); 347 } 348 349 /* 350 * nfs lookup call, one step at a time... 351 * First look in cache 352 * If not found, unlock the directory nfsnode and do the rpc 353 */ 354 nfs_lookup(vp, ndp) 355 register struct vnode *vp; 356 register struct nameidata *ndp; 357 { 358 register struct vnode *vdp; 359 nfsm_vars; 360 struct vnode *newvp; 361 long len; 362 nfsv2fh_t *fhp; 363 struct nfsnode *np; 364 int lockparent, wantparent, flag; 365 dev_t rdev; 366 367 ndp->ni_dvp = vp; 368 ndp->ni_vp = NULL; 369 if (vp->v_type != VDIR) 370 return (ENOTDIR); 371 lockparent = ndp->ni_nameiop & LOCKPARENT; 372 flag = ndp->ni_nameiop & OPFLAG; 373 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 374 if ((error = cache_lookup(ndp)) && error != ENOENT) { 375 struct vattr vattr; 376 int vpid; 377 378 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 379 panic("nfs_lookup: .. through root"); 380 vdp = ndp->ni_vp; 381 vpid = vdp->v_id; 382 /* 383 * See the comment starting `Step through' in ufs/ufs_lookup.c 384 * for an explanation of the locking protocol 385 */ 386 if (vp == vdp) { 387 VREF(vdp); 388 error = 0; 389 } else if (ndp->ni_isdotdot) { 390 nfs_unlock(vp); 391 error = vget(vdp); 392 } else { 393 error = vget(vdp); 394 nfs_unlock(vp); 395 } 396 if (!error) { 397 if (vpid == vdp->v_id && 398 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 399 nfsstats.lookupcache_hits++; 400 return (0); 401 } else { 402 nfs_nput(vdp); 403 } 404 } 405 nfs_lock(vp); 406 ndp->ni_vp = (struct vnode *)0; 407 } 408 error = 0; 409 nfsstats.lookupcache_misses++; 410 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 411 len = ndp->ni_namelen; 412 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 413 nfsm_fhtom(vp); 414 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 415 nfsm_request(vp); 416 nfsmout: 417 if (error) { 418 if ((flag == CREATE || flag == RENAME) && 419 *ndp->ni_next == 0) { 420 if (!lockparent) 421 nfs_unlock(vp); 422 } 423 return (ENOENT); 424 } 425 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 426 427 /* 428 * Handle DELETE and RENAME cases... 429 */ 430 if (flag == DELETE && *ndp->ni_next == 0) { 431 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 432 VREF(vp); 433 newvp = vp; 434 np = VTONFS(vp); 435 } else { 436 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 437 m_freem(mrep); 438 return (error); 439 } 440 newvp = NFSTOV(np); 441 } 442 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 443 if (newvp != vp) 444 nfs_nput(newvp); 445 else 446 vrele(vp); 447 m_freem(mrep); 448 return (error); 449 } 450 ndp->ni_vp = newvp; 451 if (!lockparent) 452 nfs_unlock(vp); 453 m_freem(mrep); 454 return (0); 455 } 456 457 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 458 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 459 m_freem(mrep); 460 return (EISDIR); 461 } 462 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 463 m_freem(mrep); 464 return (error); 465 } 466 newvp = NFSTOV(np); 467 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 468 nfs_nput(newvp); 469 m_freem(mrep); 470 return (error); 471 } 472 ndp->ni_vp = newvp; 473 if (!lockparent) 474 nfs_unlock(vp); 475 return (0); 476 } 477 478 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 479 VREF(vp); 480 newvp = vp; 481 np = VTONFS(vp); 482 } else if (ndp->ni_isdotdot) { 483 nfs_unlock(vp); 484 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 485 nfs_lock(vp); 486 m_freem(mrep); 487 return (error); 488 } 489 nfs_lock(vp); 490 newvp = NFSTOV(np); 491 } else { 492 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 493 m_freem(mrep); 494 return (error); 495 } 496 newvp = NFSTOV(np); 497 } 498 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 499 if (newvp != vp) 500 nfs_nput(newvp); 501 else 502 vrele(vp); 503 m_freem(mrep); 504 return (error); 505 } 506 m_freem(mrep); 507 508 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 509 nfs_unlock(vp); 510 ndp->ni_vp = newvp; 511 if (error == 0 && ndp->ni_makeentry) 512 cache_enter(ndp); 513 return (error); 514 } 515 516 /* 517 * nfs readlink call 518 */ 519 nfs_readlink(vp, uiop, cred) 520 struct vnode *vp; 521 struct uio *uiop; 522 struct ucred *cred; 523 { 524 nfsm_vars; 525 long len; 526 527 nfsstats.rpccnt[NFSPROC_READLINK]++; 528 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 529 nfsm_fhtom(vp); 530 nfsm_request(vp); 531 nfsm_strsiz(len, NFS_MAXPATHLEN); 532 nfsm_mtouio(uiop, len); 533 nfsm_reqdone; 534 return (error); 535 } 536 537 /* 538 * nfs read call 539 */ 540 nfs_readrpc(vp, uiop, offp, cred) 541 struct vnode *vp; 542 struct uio *uiop; 543 off_t *offp; 544 struct ucred *cred; 545 { 546 nfsm_vars; 547 struct nfsmount *nmp; 548 long len, retlen, tsiz; 549 550 nmp = vfs_to_nfs(vp->v_mount); 551 tsiz = uiop->uio_resid; 552 while (tsiz > 0) { 553 nfsstats.rpccnt[NFSPROC_READ]++; 554 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 555 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 556 nfsm_fhtom(vp); 557 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 558 *p++ = txdr_unsigned(*offp); 559 *p++ = txdr_unsigned(len); 560 *p = 0; 561 nfsm_request(vp); 562 nfsm_loadattr(vp, (struct vattr *)0); 563 nfsm_strsiz(retlen, nmp->nm_rsize); 564 nfsm_mtouio(uiop, retlen); 565 m_freem(mrep); 566 *offp += retlen; 567 if (retlen < len) 568 tsiz = 0; 569 else 570 tsiz -= len; 571 } 572 nfsmout: 573 return (error); 574 } 575 576 /* 577 * nfs write call 578 */ 579 nfs_writerpc(vp, uiop, offp, cred) 580 struct vnode *vp; 581 struct uio *uiop; 582 off_t *offp; 583 struct ucred *cred; 584 { 585 nfsm_vars; 586 struct nfsmount *nmp; 587 long len, tsiz; 588 589 nmp = vfs_to_nfs(vp->v_mount); 590 tsiz = uiop->uio_resid; 591 while (tsiz > 0) { 592 nfsstats.rpccnt[NFSPROC_WRITE]++; 593 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 594 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 595 NFSX_FH+NFSX_UNSIGNED*4); 596 nfsm_fhtom(vp); 597 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 598 *(p+1) = txdr_unsigned(*offp); 599 *(p+3) = txdr_unsigned(len); 600 nfsm_uiotom(uiop, len); 601 nfsm_request(vp); 602 nfsm_loadattr(vp, (struct vattr *)0); 603 m_freem(mrep); 604 tsiz -= len; 605 *offp += len; 606 } 607 nfsmout: 608 return (error); 609 } 610 611 /* 612 * nfs file create call 613 */ 614 nfs_create(ndp, vap) 615 register struct nameidata *ndp; 616 register struct vattr *vap; 617 { 618 register struct nfsv2_sattr *sp; 619 nfsm_vars; 620 621 nfsstats.rpccnt[NFSPROC_CREATE]++; 622 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 623 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 624 nfsm_fhtom(ndp->ni_dvp); 625 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 626 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 627 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 628 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 629 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 630 sp->sa_size = txdr_unsigned(0); 631 /* or should these be VNOVAL ?? */ 632 txdr_time(&vap->va_atime, &sp->sa_atime); 633 txdr_time(&vap->va_mtime, &sp->sa_mtime); 634 nfsm_request(ndp->ni_dvp); 635 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 636 nfsm_reqdone; 637 nfs_nput(ndp->ni_dvp); 638 return (error); 639 } 640 641 /* 642 * nfs file remove call 643 * To try and make nfs semantics closer to vfs semantics, a file that has 644 * other references to the vnode is renamed instead of removed and then 645 * removed later on the last close. 646 * Unfortunately you must flush the buffer cache and cmap to get rid of 647 * all extraneous vnode references before you check the reference cnt. 648 * 1 - If the file could have blocks in the buffer cache 649 * flush them out and invalidate them 650 * mpurge the vnode to flush out cmap references 651 * (This is necessary to update the vnode ref cnt as well as sensible 652 * for actual removes, to free up the buffers) 653 * 2 - If v_count > 1 654 * If a rename is not already in the works 655 * call nfs_sillyrename() to set it up 656 * else 657 * do the remove rpc 658 */ 659 nfs_remove(ndp) 660 register struct nameidata *ndp; 661 { 662 register struct vnode *vp = ndp->ni_vp; 663 register struct nfsnode *np = VTONFS(ndp->ni_vp); 664 nfsm_vars; 665 666 if (vp->v_type == VREG) { 667 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 668 np->n_flag &= ~(NMODIFIED|NBUFFERED); 669 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 670 } 671 if (np->n_flag & NPAGEDON) 672 mpurge(vp); /* In case cmap entries still ref it */ 673 } 674 if (vp->v_count > 1) { 675 if (!np->n_sillyrename) 676 error = nfs_sillyrename(ndp, REMOVE); 677 } else { 678 nfsstats.rpccnt[NFSPROC_REMOVE]++; 679 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 680 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 681 nfsm_fhtom(ndp->ni_dvp); 682 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 683 nfsm_request(ndp->ni_dvp); 684 nfsm_reqdone; 685 } 686 if (ndp->ni_dvp == ndp->ni_vp) 687 vrele(ndp->ni_vp); 688 else 689 nfs_nput(ndp->ni_vp); 690 nfs_nput(ndp->ni_dvp); 691 return (error); 692 } 693 694 /* 695 * nfs file remove rpc called from nfs_inactive 696 */ 697 nfs_removeit(ndp) 698 register struct nameidata *ndp; 699 { 700 nfsm_vars; 701 702 nfsstats.rpccnt[NFSPROC_REMOVE]++; 703 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 704 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 705 nfsm_fhtom(ndp->ni_dvp); 706 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 707 nfsm_request(ndp->ni_dvp); 708 nfsm_reqdone; 709 return (error); 710 } 711 712 /* 713 * nfs file rename call 714 */ 715 nfs_rename(sndp, tndp) 716 register struct nameidata *sndp, *tndp; 717 { 718 nfsm_vars; 719 720 nfsstats.rpccnt[NFSPROC_RENAME]++; 721 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 722 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 723 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 724 nfsm_fhtom(sndp->ni_dvp); 725 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 726 nfsm_fhtom(tndp->ni_dvp); 727 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 728 nfsm_request(sndp->ni_dvp); 729 nfsm_reqdone; 730 if (sndp->ni_vp->v_type == VDIR) { 731 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 732 cache_purge(tndp->ni_dvp); 733 cache_purge(sndp->ni_dvp); 734 } 735 nfs_abortop(sndp); 736 nfs_abortop(tndp); 737 return (error); 738 } 739 740 /* 741 * nfs file rename rpc called from above 742 */ 743 nfs_renameit(sndp, tndp) 744 register struct nameidata *sndp, *tndp; 745 { 746 nfsm_vars; 747 748 nfsstats.rpccnt[NFSPROC_RENAME]++; 749 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 750 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 751 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 752 nfsm_fhtom(sndp->ni_dvp); 753 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 754 nfsm_fhtom(tndp->ni_dvp); 755 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 756 nfsm_request(sndp->ni_dvp); 757 nfsm_reqdone; 758 return (error); 759 } 760 761 /* 762 * nfs hard link create call 763 */ 764 nfs_link(vp, ndp) 765 struct vnode *vp; 766 register struct nameidata *ndp; 767 { 768 nfsm_vars; 769 770 if (ndp->ni_dvp != vp) 771 nfs_lock(vp); 772 nfsstats.rpccnt[NFSPROC_LINK]++; 773 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 774 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 775 nfsm_fhtom(vp); 776 nfsm_fhtom(ndp->ni_dvp); 777 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 778 nfsm_request(vp); 779 nfsm_reqdone; 780 if (ndp->ni_dvp != vp) 781 nfs_unlock(vp); 782 nfs_nput(ndp->ni_dvp); 783 return (error); 784 } 785 786 /* 787 * nfs symbolic link create call 788 */ 789 nfs_symlink(ndp, vap, nm) 790 struct nameidata *ndp; 791 struct vattr *vap; 792 char *nm; /* is this the path ?? */ 793 { 794 register struct nfsv2_sattr *sp; 795 nfsm_vars; 796 797 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 798 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 799 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 800 nfsm_fhtom(ndp->ni_dvp); 801 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 802 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 803 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 804 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 805 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 806 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 807 sp->sa_size = txdr_unsigned(VNOVAL); 808 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 809 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 810 nfsm_request(ndp->ni_dvp); 811 nfsm_reqdone; 812 nfs_nput(ndp->ni_dvp); 813 return (error); 814 } 815 816 /* 817 * nfs make dir call 818 */ 819 nfs_mkdir(ndp, vap) 820 struct nameidata *ndp; 821 struct vattr *vap; 822 { 823 register struct nfsv2_sattr *sp; 824 nfsm_vars; 825 826 nfsstats.rpccnt[NFSPROC_MKDIR]++; 827 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 828 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 829 nfsm_fhtom(ndp->ni_dvp); 830 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 831 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 832 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 833 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 834 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 835 sp->sa_size = txdr_unsigned(VNOVAL); 836 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 837 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 838 nfsm_request(ndp->ni_dvp); 839 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 840 nfsm_reqdone; 841 nfs_nput(ndp->ni_dvp); 842 return (error); 843 } 844 845 /* 846 * nfs remove directory call 847 */ 848 nfs_rmdir(ndp) 849 register struct nameidata *ndp; 850 { 851 nfsm_vars; 852 853 if (ndp->ni_dvp == ndp->ni_vp) { 854 vrele(ndp->ni_dvp); 855 nfs_nput(ndp->ni_dvp); 856 return (EINVAL); 857 } 858 nfsstats.rpccnt[NFSPROC_RMDIR]++; 859 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 860 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 861 nfsm_fhtom(ndp->ni_dvp); 862 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 863 nfsm_request(ndp->ni_dvp); 864 nfsm_reqdone; 865 cache_purge(ndp->ni_dvp); 866 cache_purge(ndp->ni_vp); 867 nfs_nput(ndp->ni_vp); 868 nfs_nput(ndp->ni_dvp); 869 return (error); 870 } 871 872 /* 873 * nfs readdir call 874 * Although cookie is defined as opaque, I translate it to/from net byte 875 * order so that it looks more sensible. This appears consistent with the 876 * Ultrix implementation of NFS. 877 */ 878 nfs_readdir(vp, uiop, offp, cred) 879 struct vnode *vp; 880 struct uio *uiop; 881 off_t *offp; 882 struct ucred *cred; 883 { 884 register long len; 885 register struct direct *dp; 886 nfsm_vars; 887 struct mbuf *md2; 888 caddr_t dpos2; 889 int siz; 890 int more_dirs, eofflg; 891 off_t off, savoff; 892 struct direct *savdp; 893 894 nfs_lock(vp); 895 nfsstats.rpccnt[NFSPROC_READDIR]++; 896 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 897 nfsm_fhtom(vp); 898 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 899 off = *offp; 900 *p++ = txdr_unsigned(off); 901 *p = txdr_unsigned(uiop->uio_resid); 902 nfsm_request(vp); 903 siz = 0; 904 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 905 more_dirs = fxdr_unsigned(int, *p); 906 907 /* Save the position so that we can do nfsm_mtouio() later */ 908 dpos2 = dpos; 909 md2 = md; 910 911 /* loop thru the dir entries, doctoring them to 4bsd form */ 912 while (more_dirs && siz < uiop->uio_resid) { 913 savoff = off; /* Hold onto offset and dp */ 914 savdp = dp; 915 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 916 dp = (struct direct *)p; 917 dp->d_ino = fxdr_unsigned(u_long, *p++); 918 len = fxdr_unsigned(int, *p); 919 if (len <= 0 || len > NFS_MAXNAMLEN) { 920 error = EBADRPC; 921 m_freem(mrep); 922 goto nfsmout; 923 } 924 dp->d_namlen = (u_short)len; 925 len = nfsm_rndup(len); 926 nfsm_adv(len); 927 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 928 off = fxdr_unsigned(off_t, *p); 929 *p++ = 0; /* Ensures null termination of name */ 930 more_dirs = fxdr_unsigned(int, *p); 931 dp->d_reclen = len+4*NFSX_UNSIGNED; 932 siz += dp->d_reclen; 933 } 934 /* 935 * If at end of rpc data, get the eof boolean 936 */ 937 if (!more_dirs) { 938 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 939 eofflg = fxdr_unsigned(long, *p); 940 } 941 /* 942 * If there is too much to fit in the data buffer, use savoff and 943 * savdp to trim off the last record. 944 * --> we are not at eof 945 */ 946 if (siz > uiop->uio_resid) { 947 eofflg = FALSE; 948 off = savoff; 949 siz -= dp->d_reclen; 950 dp = savdp; 951 } 952 if (siz > 0) { 953 #ifdef notdef 954 if (!eofflg) 955 dp->d_reclen += (uiop->uio_resid-siz); 956 #endif 957 md = md2; 958 dpos = dpos2; 959 nfsm_mtouio(uiop, siz); 960 #ifdef notdef 961 if (!eofflg) 962 uiop->uio_resid = 0; 963 #endif 964 *offp = off; 965 } 966 nfsm_reqdone; 967 nfs_unlock(vp); 968 return (error); 969 } 970 971 /* 972 * nfs statfs call 973 * (Actually a vfsop, not a vnode op) 974 */ 975 nfs_statfs(mp, sbp) 976 struct mount *mp; 977 register struct statfs *sbp; 978 { 979 register struct nfsv2_statfs *sfp; 980 nfsm_vars; 981 struct nfsmount *nmp; 982 struct ucred *cred; 983 struct nfsnode *np; 984 struct vnode *vp; 985 986 nmp = vfs_to_nfs(mp); 987 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 988 return (error); 989 vp = NFSTOV(np); 990 nfsstats.rpccnt[NFSPROC_STATFS]++; 991 cred = crget(); 992 cred->cr_ngroups = 1; 993 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 994 nfsm_fhtom(vp); 995 nfsm_request(vp); 996 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 997 sbp->f_type = MOUNT_NFS; 998 sbp->f_flags = nmp->nm_flag; 999 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1000 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1001 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1002 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1003 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1004 sbp->f_files = 0; 1005 sbp->f_ffree = 0; 1006 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1007 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1008 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1009 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1010 nfsm_reqdone; 1011 nfs_nput(vp); 1012 crfree(cred); 1013 return (error); 1014 } 1015 1016 #define HEXTOASC(x) "0123456789abcdef"[x] 1017 1018 /* 1019 * Silly rename. To make the NFS filesystem that is stateless look a little 1020 * more like the "ufs" a remove of an active vnode is translated to a rename 1021 * to a funny looking filename that is removed by nfs_inactive on the 1022 * nfsnode. There is the potential for another process on a different client 1023 * to create the same funny name between the nfs_lookitup() fails and the 1024 * nfs_rename() completes, but... 1025 */ 1026 nfs_sillyrename(ndp, flag) 1027 struct nameidata *ndp; 1028 int flag; 1029 { 1030 register struct nfsnode *np; 1031 register struct sillyrename *sp; 1032 register struct nameidata *tndp; 1033 int error; 1034 short pid; 1035 1036 np = VTONFS(ndp->ni_dvp); 1037 cache_purge(ndp->ni_dvp); 1038 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1039 M_TEMP, M_WAITOK); 1040 sp->s_flag = flag; 1041 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1042 np = VTONFS(ndp->ni_vp); 1043 tndp = &sp->s_namei; 1044 tndp->ni_cred = crdup(ndp->ni_cred); 1045 1046 /* Fudge together a funny name */ 1047 pid = u.u_procp->p_pid; 1048 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1049 tndp->ni_dent.d_namlen = 12; 1050 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1051 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1052 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1053 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1054 1055 /* Try lookitups until we get one that isn't there */ 1056 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1057 tndp->ni_dent.d_name[4]++; 1058 if (tndp->ni_dent.d_name[4] > 'z') { 1059 error = EINVAL; 1060 goto bad; 1061 } 1062 } 1063 if (error = nfs_renameit(ndp, tndp)) 1064 goto bad; 1065 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1066 np->n_sillyrename = sp; 1067 return (0); 1068 bad: 1069 crfree(tndp->ni_cred); 1070 free((caddr_t)sp, M_TEMP); 1071 return (error); 1072 } 1073 1074 /* 1075 * Look up a file name for silly rename stuff. 1076 * Just like nfs_lookup() except that it doesn't load returned values 1077 * into the nfsnode table. 1078 * If fhp != NULL it copies the returned file handle out 1079 */ 1080 nfs_lookitup(vp, ndp, fhp) 1081 register struct vnode *vp; 1082 register struct nameidata *ndp; 1083 nfsv2fh_t *fhp; 1084 { 1085 nfsm_vars; 1086 long len; 1087 1088 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1089 ndp->ni_dvp = vp; 1090 ndp->ni_vp = NULL; 1091 len = ndp->ni_dent.d_namlen; 1092 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1093 nfsm_fhtom(vp); 1094 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1095 nfsm_request(vp); 1096 if (fhp != NULL) { 1097 nfsm_disect(cp, caddr_t, NFSX_FH); 1098 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1099 } 1100 nfsm_reqdone; 1101 return (error); 1102 } 1103 1104 /* 1105 * Kludge City.. 1106 * - make nfs_bmap() essentially a no-op that does no translation 1107 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1108 * after mapping the physical addresses into Kernel Virtual space in the 1109 * nfsiobuf area. 1110 * (Maybe I could use the process's page mapping, but I was concerned that 1111 * Kernel Write might not be enabled and also figured copyout() would do 1112 * a lot more work than bcopy() and also it currently happens in the 1113 * context of the swapper process (2). 1114 */ 1115 nfs_bmap(vp, bn, vpp, bnp) 1116 struct vnode *vp; 1117 daddr_t bn; 1118 struct vnode **vpp; 1119 daddr_t *bnp; 1120 { 1121 if (vpp != NULL) 1122 *vpp = vp; 1123 if (bnp != NULL) 1124 *bnp = bn * btodb(vp->v_mount->m_bsize); 1125 return (0); 1126 } 1127 1128 /* 1129 * Strategy routine for phys. i/o 1130 * If the biod's are running, queue a request 1131 * otherwise just call nfs_doio() to get it done 1132 */ 1133 nfs_strategy(bp) 1134 register struct buf *bp; 1135 { 1136 register struct buf *dp; 1137 register int i; 1138 struct proc *rp; 1139 int error = 0; 1140 int fnd = 0; 1141 1142 /* 1143 * If an i/o daemon is waiting 1144 * queue the request, wake it up and wait for completion 1145 * otherwise just do it ourselves 1146 */ 1147 for (i = 0; i < nfs_asyncdaemons; i++) { 1148 if (rp = nfs_iodwant[i]) { 1149 /* 1150 * Ensure that the async_daemon is still waiting here 1151 */ 1152 if (rp->p_stat != SSLEEP || 1153 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1154 nfs_iodwant[i] = (struct proc *)0; 1155 continue; 1156 } 1157 dp = &nfs_bqueue; 1158 if (dp->b_actf == NULL) { 1159 dp->b_actl = bp; 1160 bp->b_actf = dp; 1161 } else { 1162 dp->b_actf->b_actl = bp; 1163 bp->b_actf = dp->b_actf; 1164 } 1165 dp->b_actf = bp; 1166 bp->b_actl = dp; 1167 fnd++; 1168 nfs_iodwant[i] = (struct proc *)0; 1169 wakeup((caddr_t)&nfs_iodwant[i]); 1170 break; 1171 } 1172 } 1173 if (!fnd) 1174 error = nfs_doio(bp); 1175 return (error); 1176 } 1177 1178 /* 1179 * Fun and games with i/o 1180 * Essentially play ubasetup() and disk interrupt service routine by 1181 * mapping the data buffer into kernel virtual space and doing the 1182 * nfs read or write rpc's from it. 1183 * If the biod's are not running, this is just called from nfs_strategy(), 1184 * otherwise it is called by the biod's to do what would normally be 1185 * partially disk interrupt driven. 1186 */ 1187 nfs_doio(bp) 1188 register struct buf *bp; 1189 { 1190 register struct pte *pte, *ppte; 1191 register caddr_t vaddr; 1192 register struct uio *uiop; 1193 register struct vnode *vp; 1194 struct nfsnode *np; 1195 struct ucred *cr; 1196 int npf, npf2; 1197 int reg; 1198 caddr_t vbase; 1199 caddr_t addr; 1200 unsigned v; 1201 struct proc *rp; 1202 int o, error; 1203 int bcnt; 1204 off_t off; 1205 struct uio uio; 1206 struct iovec io; 1207 1208 vp = bp->b_vp; 1209 uiop = &uio; 1210 uiop->uio_iov = &io; 1211 uiop->uio_iovcnt = 1; 1212 uiop->uio_segflg = UIO_SYSSPACE; 1213 if (bp->b_flags & B_READ) { 1214 io.iov_len = uiop->uio_resid = bp->b_bcount; 1215 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1216 addr = bp->b_un.b_addr; 1217 bcnt = bp->b_bcount; 1218 } else { 1219 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1220 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1221 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1222 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1223 } 1224 /* 1225 * For phys i/o, map the b_addr into kernel virtual space using 1226 * the Nfsiomap pte's 1227 * Also, add a temporary b_rcred for reading using the process's uid 1228 * and a guess at a group 1229 */ 1230 if (bp->b_flags & B_PHYS) { 1231 VTONFS(vp)->n_flag |= NPAGEDON; 1232 bp->b_rcred = cr = crget(); 1233 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1234 cr->cr_uid = rp->p_uid; 1235 cr->cr_gid = 0; /* Anything ?? */ 1236 cr->cr_ngroups = 1; 1237 o = (int)addr & PGOFSET; 1238 npf2 = npf = btoc(bcnt + o); 1239 /* 1240 * Get some mapping page table entries 1241 */ 1242 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1243 nfsmap_want++; 1244 sleep((caddr_t)&nfsmap_want, PZERO-1); 1245 } 1246 reg--; 1247 /* I know it is always the else, but that may change someday */ 1248 if ((bp->b_flags & B_PHYS) == 0) 1249 pte = kvtopte(bp->b_un.b_addr); 1250 else if (bp->b_flags & B_PAGET) 1251 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1252 else { 1253 v = btop(bp->b_un.b_addr); 1254 if (bp->b_flags & B_UAREA) 1255 pte = &rp->p_addr[v]; 1256 else 1257 pte = vtopte(rp, v); 1258 } 1259 /* 1260 * Play vmaccess() but with the Nfsiomap page table 1261 */ 1262 ppte = &Nfsiomap[reg]; 1263 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1264 while (npf != 0) { 1265 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1266 #if defined(tahoe) 1267 mtpr(P1DC, vaddr); 1268 #endif 1269 ppte++; 1270 pte++; 1271 vaddr += NBPG; 1272 --npf; 1273 } 1274 io.iov_base = vbase+o; 1275 } else { 1276 io.iov_base = addr; 1277 } 1278 if (bp->b_flags & B_READ) { 1279 uiop->uio_rw = UIO_READ; 1280 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1281 } else { 1282 uiop->uio_rw = UIO_WRITE; 1283 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1284 if (error) { 1285 np = VTONFS(vp); 1286 np->n_error = error; 1287 np->n_flag |= NWRITEERR; 1288 } 1289 bp->b_dirtyoff = bp->b_dirtyend = 0; 1290 } 1291 if (error) 1292 bp->b_flags |= B_ERROR; 1293 bp->b_resid = uiop->uio_resid; 1294 /* 1295 * Release pte's used by physical i/o 1296 */ 1297 if (bp->b_flags & B_PHYS) { 1298 crfree(cr); 1299 rmfree(nfsmap, (long)npf2, (long)++reg); 1300 if (nfsmap_want) { 1301 nfsmap_want = 0; 1302 wakeup((caddr_t)&nfsmap_want); 1303 } 1304 } 1305 biodone(bp); 1306 return (error); 1307 } 1308 1309 /* 1310 * Flush all the blocks associated with a vnode. 1311 * Walk through the buffer pool and push any dirty pages 1312 * associated with the vnode. 1313 */ 1314 nfs_fsync(vp, fflags, cred) 1315 register struct vnode *vp; 1316 int fflags; 1317 struct ucred *cred; 1318 { 1319 register struct nfsnode *np = VTONFS(vp); 1320 int error; 1321 1322 nfs_lock(vp); 1323 if (np->n_flag & NMODIFIED) { 1324 np->n_flag &= ~NMODIFIED; 1325 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1326 } 1327 nfs_unlock(vp); 1328 return (error); 1329 } 1330