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 7.6 (Berkeley) 10/19/89 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 ufs_bmap(), 127 blk_strategy(); 128 129 struct vnodeops nfsv2chr_vnodeops = { 130 vfs_noop, 131 vfs_noop, 132 vfs_noop, 133 blk_open, 134 nfs_close, 135 nfs_access, 136 nfs_getattr, 137 nfs_setattr, 138 blk_read, 139 blk_write, 140 blk_ioctl, 141 blk_select, 142 vfs_noop, 143 vfs_nullop, 144 vfs_noop, 145 nfs_remove, 146 nfs_link, 147 nfs_rename, 148 vfs_noop, 149 vfs_noop, 150 nfs_symlink, 151 vfs_noop, 152 vfs_noop, 153 nfs_abortop, 154 nfs_inactive, 155 nfs_lock, 156 nfs_unlock, 157 ufs_bmap, 158 blk_strategy, 159 }; 160 161 extern u_long nfs_procids[NFS_NPROCS]; 162 extern u_long nfs_prog, nfs_vers; 163 extern char nfsiobuf[MAXPHYS+NBPG]; 164 struct map nfsmap[NFS_MSIZ]; 165 enum vtype v_type[NFLNK+1]; 166 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 167 int nfs_asyncdaemons = 0; 168 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 169 static int nfsmap_want = 0; 170 171 /* 172 * nfs null call from vfs. 173 */ 174 nfs_null(vp, cred) 175 struct vnode *vp; 176 struct ucred *cred; 177 { 178 nfsm_vars; 179 180 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 181 nfsm_request(vp); 182 nfsm_reqdone; 183 return (error); 184 } 185 186 /* 187 * nfs access vnode op. 188 * Essentially just get vattr and then imitate iaccess() 189 */ 190 nfs_access(vp, mode, cred) 191 struct vnode *vp; 192 int mode; 193 register struct ucred *cred; 194 { 195 register struct vattr *vap; 196 register gid_t *gp; 197 struct vattr vattr; 198 register int i; 199 int error; 200 201 /* 202 * If you're the super-user, 203 * you always get access. 204 */ 205 if (cred->cr_uid == 0) 206 return (0); 207 vap = &vattr; 208 if (error = nfs_getattr(vp, vap, cred)) 209 return (error); 210 /* 211 * Access check is based on only one of owner, group, public. 212 * If not owner, then check group. If not a member of the 213 * group, then check public access. 214 */ 215 if (cred->cr_uid != vap->va_uid) { 216 mode >>= 3; 217 gp = cred->cr_groups; 218 for (i = 0; i < cred->cr_ngroups; i++, gp++) 219 if (vap->va_gid == *gp) 220 goto found; 221 mode >>= 3; 222 found: 223 ; 224 } 225 if ((vap->va_mode & mode) != 0) 226 return (0); 227 return (EACCES); 228 } 229 230 /* 231 * nfs open vnode op 232 * Just check to see if the type is ok 233 */ 234 nfs_open(vp, mode, cred) 235 struct vnode *vp; 236 int mode; 237 struct ucred *cred; 238 { 239 register enum vtype vtyp; 240 241 vtyp = vp->v_type; 242 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 243 return (0); 244 else 245 return (EACCES); 246 } 247 248 /* 249 * nfs close vnode op 250 * For reg files, invalidate any buffer cache entries. 251 * For VCHR, do the device close 252 */ 253 nfs_close(vp, fflags, cred) 254 register struct vnode *vp; 255 int fflags; 256 struct ucred *cred; 257 { 258 struct nfsnode *np = VTONFS(vp); 259 dev_t dev; 260 int error = 0; 261 262 nfs_lock(vp); 263 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 264 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 265 np->n_flag &= ~(NMODIFIED|NBUFFERED); 266 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 267 if (np->n_flag & NWRITEERR) { 268 np->n_flag &= ~NWRITEERR; 269 if (!error) 270 error = np->n_error ? np->n_error : EIO; 271 } 272 } 273 nfs_unlock(vp); 274 if (vp->v_type != VCHR || vp->v_count > 1) 275 return (error); 276 dev = vp->v_rdev; 277 /* XXX what is this doing below the vnode op call */ 278 if (setjmp(&u.u_qsave)) { 279 /* 280 * If device close routine is interrupted, 281 * must return so closef can clean up. 282 */ 283 error = EINTR; 284 } else 285 error = (*cdevsw[major(dev)].d_close)(dev, fflags, IFCHR); 286 /* 287 * Most device close routines don't return errors, 288 * and dup2() doesn't work right on error. 289 */ 290 error = 0; /* XXX */ 291 return (error); 292 } 293 294 /* 295 * nfs getattr call from vfs. 296 */ 297 nfs_getattr(vp, vap, cred) 298 struct vnode *vp; 299 register struct vattr *vap; 300 struct ucred *cred; 301 { 302 nfsm_vars; 303 304 /* First look in the cache.. */ 305 if (nfs_getattrcache(vp, vap) == 0) 306 return (0); 307 nfsstats.rpccnt[NFSPROC_GETATTR]++; 308 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 309 nfsm_fhtom(vp); 310 nfsm_request(vp); 311 nfsm_loadattr(vp, vap); 312 nfsm_reqdone; 313 return (error); 314 } 315 316 /* 317 * nfs setattr call. 318 */ 319 nfs_setattr(vp, vap, cred) 320 struct vnode *vp; 321 register struct vattr *vap; 322 struct ucred *cred; 323 { 324 register struct nfsv2_sattr *sp; 325 nfsm_vars; 326 327 nfsstats.rpccnt[NFSPROC_SETATTR]++; 328 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 329 nfsm_fhtom(vp); 330 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 331 if (vap->va_mode == 0xffff) 332 sp->sa_mode = VNOVAL; 333 else 334 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 335 if (vap->va_uid == 0xffff) 336 sp->sa_uid = VNOVAL; 337 else 338 sp->sa_uid = txdr_unsigned(vap->va_uid); 339 if (vap->va_gid == 0xffff) 340 sp->sa_gid = VNOVAL; 341 else 342 sp->sa_gid = txdr_unsigned(vap->va_gid); 343 sp->sa_size = txdr_unsigned(vap->va_size); 344 if (vap->va_size != VNOVAL) 345 VTONFS(vp)->n_size = vap->va_size; 346 txdr_time(&vap->va_atime, &sp->sa_atime); 347 txdr_time(&vap->va_mtime, &sp->sa_mtime); 348 nfsm_request(vp); 349 nfsm_loadattr(vp, (struct vattr *)0); 350 /* should we fill in any vap fields ?? */ 351 nfsm_reqdone; 352 return (error); 353 } 354 355 /* 356 * nfs lookup call, one step at a time... 357 * First look in cache 358 * If not found, unlock the directory nfsnode and do the rpc 359 */ 360 nfs_lookup(vp, ndp) 361 register struct vnode *vp; 362 register struct nameidata *ndp; 363 { 364 register struct vnode *vdp; 365 nfsm_vars; 366 struct vnode *newvp; 367 long len; 368 nfsv2fh_t *fhp; 369 struct nfsnode *np; 370 int lockparent, wantparent, flag; 371 dev_t rdev; 372 373 ndp->ni_dvp = vp; 374 ndp->ni_vp = NULL; 375 if (vp->v_type != VDIR) 376 return (ENOTDIR); 377 lockparent = ndp->ni_nameiop & LOCKPARENT; 378 flag = ndp->ni_nameiop & OPFLAG; 379 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 380 #ifndef notyet 381 if ((error = cache_lookup(ndp)) && error != ENOENT) { 382 struct vattr vattr; 383 int vpid; 384 385 if (ndp->ni_vp == ndp->ni_rdir && ndp->ni_isdotdot) 386 vdp = vp; 387 else 388 vdp = ndp->ni_vp; 389 vpid = vdp->v_id; 390 /* 391 * See the comment starting `Step through' in ufs/ufs_lookup.c 392 * for an explanation of the locking protocol 393 */ 394 if (vp == vdp) { 395 VREF(vdp); 396 } else if (ndp->ni_isdotdot) { 397 nfs_unlock(vp); 398 nfs_ngrab(VTONFS(vdp)); 399 } else { 400 nfs_ngrab(VTONFS(vdp)); 401 nfs_unlock(vp); 402 } 403 if (vpid == vdp->v_id && 404 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 405 nfsstats.lookupcache_hits++; 406 if (vdp->v_type == VNON) { 407 vdp->v_type = vattr.va_type; 408 VTONFS(vdp)->n_mtime = vattr.va_mtime.tv_sec; 409 } 410 return (0); 411 } 412 nfs_nput(vdp); 413 nfs_lock(vp); 414 ndp->ni_vp = (struct vnode *)0; 415 } 416 error = 0; 417 nfsstats.lookupcache_misses++; 418 #endif 419 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 420 len = ndp->ni_namelen; 421 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 422 nfsm_fhtom(vp); 423 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 424 nfsm_request(vp); 425 nfsmout: 426 if (error) { 427 if ((flag == CREATE || flag == RENAME) && 428 *ndp->ni_next == 0) { 429 if (!lockparent) 430 nfs_unlock(vp); 431 } 432 return (ENOENT); 433 } 434 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 435 436 /* 437 * Handle DELETE and RENAME cases... 438 */ 439 if (flag == DELETE && *ndp->ni_next == 0) { 440 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 441 VREF(vp); 442 newvp = vp; 443 np = VTONFS(vp); 444 } else { 445 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 446 m_freem(mrep); 447 return (error); 448 } 449 newvp = NFSTOV(np); 450 } 451 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 452 if (newvp != vp) 453 nfs_nput(newvp); 454 else 455 vrele(vp); 456 m_freem(mrep); 457 return (error); 458 } 459 if (newvp->v_type == VNON) { 460 newvp->v_type = np->n_vattr.va_type; 461 np->n_mtime = np->n_vattr.va_mtime.tv_sec; 462 } 463 ndp->ni_vp = newvp; 464 if (!lockparent) 465 nfs_unlock(vp); 466 m_freem(mrep); 467 return (0); 468 } 469 470 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 471 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 472 m_freem(mrep); 473 return (EISDIR); 474 } 475 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 476 m_freem(mrep); 477 return (error); 478 } 479 newvp = NFSTOV(np); 480 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 481 nfs_nput(newvp); 482 m_freem(mrep); 483 return (error); 484 } 485 ndp->ni_vp = newvp; 486 if (!lockparent) 487 nfs_unlock(vp); 488 return (0); 489 } 490 491 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 492 VREF(vp); 493 newvp = vp; 494 np = VTONFS(vp); 495 } else if (ndp->ni_isdotdot) { 496 nfs_unlock(vp); 497 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 498 nfs_lock(vp); 499 m_freem(mrep); 500 return (error); 501 } 502 nfs_lock(vp); 503 newvp = NFSTOV(np); 504 } else { 505 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 506 m_freem(mrep); 507 return (error); 508 } 509 newvp = NFSTOV(np); 510 } 511 if (error = nfs_loadattrcache(newvp, &md, &dpos, (struct vattr *)0)) { 512 if (newvp != vp) 513 nfs_nput(newvp); 514 else 515 vrele(vp); 516 m_freem(mrep); 517 return (error); 518 } 519 m_freem(mrep); 520 if (newvp->v_type == VNON) { 521 newvp->v_type = np->n_vattr.va_type; 522 np->n_mtime = np->n_vattr.va_mtime.tv_sec; 523 } 524 525 /* 526 * Handling special files... 527 * For VCHR, use the nfs_node, but with the nfsv2chr_vnodeops 528 * that are a mix of nfs and blk vnode ops. 529 * Also, returns right away to avoid loading the name cache 530 */ 531 if (newvp->v_type == VCHR) { 532 newvp->v_rdev = np->n_vattr.va_rdev; 533 newvp->v_op = &nfsv2chr_vnodeops; 534 } 535 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 536 nfs_unlock(vp); 537 ndp->ni_vp = newvp; 538 #ifndef notyet 539 if (error == 0 && ndp->ni_makeentry) 540 cache_enter(ndp); 541 #endif 542 return (error); 543 } 544 545 /* 546 * nfs readlink call 547 */ 548 nfs_readlink(vp, uiop, cred) 549 struct vnode *vp; 550 struct uio *uiop; 551 struct ucred *cred; 552 { 553 nfsm_vars; 554 long len; 555 556 nfsstats.rpccnt[NFSPROC_READLINK]++; 557 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 558 nfsm_fhtom(vp); 559 nfsm_request(vp); 560 nfsm_strsiz(len, NFS_MAXPATHLEN); 561 nfsm_mtouio(uiop, len); 562 nfsm_reqdone; 563 return (error); 564 } 565 566 /* 567 * nfs read call 568 */ 569 nfs_readrpc(vp, uiop, offp, cred) 570 struct vnode *vp; 571 struct uio *uiop; 572 off_t *offp; 573 struct ucred *cred; 574 { 575 nfsm_vars; 576 struct nfsmount *nmp; 577 long len, retlen, tsiz; 578 579 nmp = vfs_to_nfs(vp->v_mount); 580 tsiz = uiop->uio_resid; 581 while (tsiz > 0) { 582 nfsstats.rpccnt[NFSPROC_READ]++; 583 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 584 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 585 nfsm_fhtom(vp); 586 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 587 *p++ = txdr_unsigned(*offp); 588 *p++ = txdr_unsigned(len); 589 *p = 0; 590 nfsm_request(vp); 591 nfsm_loadattr(vp, (struct vattr *)0); 592 nfsm_strsiz(retlen, nmp->nm_rsize); 593 nfsm_mtouio(uiop, retlen); 594 m_freem(mrep); 595 *offp += retlen; 596 if (retlen < len) 597 tsiz = 0; 598 else 599 tsiz -= len; 600 } 601 nfsmout: 602 return (error); 603 } 604 605 /* 606 * nfs write call 607 */ 608 nfs_writerpc(vp, uiop, offp, cred) 609 struct vnode *vp; 610 struct uio *uiop; 611 off_t *offp; 612 struct ucred *cred; 613 { 614 nfsm_vars; 615 struct nfsmount *nmp; 616 long len, tsiz; 617 618 nmp = vfs_to_nfs(vp->v_mount); 619 tsiz = uiop->uio_resid; 620 while (tsiz > 0) { 621 nfsstats.rpccnt[NFSPROC_WRITE]++; 622 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 623 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 624 NFSX_FH+NFSX_UNSIGNED*4); 625 nfsm_fhtom(vp); 626 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 627 *(p+1) = txdr_unsigned(*offp); 628 *(p+3) = txdr_unsigned(len); 629 nfsm_uiotom(uiop, len); 630 nfsm_request(vp); 631 nfsm_loadattr(vp, (struct vattr *)0); 632 m_freem(mrep); 633 tsiz -= len; 634 *offp += len; 635 } 636 nfsmout: 637 return (error); 638 } 639 640 /* 641 * nfs file create call 642 */ 643 nfs_create(ndp, vap) 644 register struct nameidata *ndp; 645 register struct vattr *vap; 646 { 647 register struct nfsv2_sattr *sp; 648 nfsm_vars; 649 650 nfsstats.rpccnt[NFSPROC_CREATE]++; 651 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 652 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 653 nfsm_fhtom(ndp->ni_dvp); 654 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 655 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 656 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 657 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 658 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 659 sp->sa_size = txdr_unsigned(0); 660 /* or should these be VNOVAL ?? */ 661 txdr_time(&vap->va_atime, &sp->sa_atime); 662 txdr_time(&vap->va_mtime, &sp->sa_mtime); 663 nfsm_request(ndp->ni_dvp); 664 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 665 nfsm_reqdone; 666 nfs_nput(ndp->ni_dvp); 667 return (error); 668 } 669 670 /* 671 * nfs file remove call 672 * To try and make nfs semantics closer to vfs semantics, a file that has 673 * other references to the vnode is renamed instead of removed and then 674 * removed later on the last close. 675 * Unfortunately you must flush the buffer cache and cmap to get rid of 676 * all extraneous vnode references before you check the reference cnt. 677 * 1 - If the file could have blocks in the buffer cache 678 * flush them out and invalidate them 679 * mpurge the vnode to flush out cmap references 680 * (This is necessary to update the vnode ref cnt as well as sensible 681 * for actual removes, to free up the buffers) 682 * 2 - If v_count > 1 683 * If a rename is not already in the works 684 * call nfs_sillyrename() to set it up 685 * else 686 * do the remove rpc 687 */ 688 nfs_remove(ndp) 689 register struct nameidata *ndp; 690 { 691 register struct vnode *vp = ndp->ni_vp; 692 register struct nfsnode *np = VTONFS(ndp->ni_vp); 693 nfsm_vars; 694 695 if (vp->v_type == VREG) { 696 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 697 np->n_flag &= ~(NMODIFIED|NBUFFERED); 698 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 699 } 700 if (np->n_flag & NPAGEDON) 701 mpurge(vp); /* In case cmap entries still ref it */ 702 } 703 if (vp->v_count > 1) { 704 if (!np->n_sillyrename) 705 error = nfs_sillyrename(ndp, REMOVE); 706 } else { 707 nfsstats.rpccnt[NFSPROC_REMOVE]++; 708 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 709 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 710 nfsm_fhtom(ndp->ni_dvp); 711 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 712 nfsm_request(ndp->ni_dvp); 713 nfsm_reqdone; 714 } 715 if (ndp->ni_dvp == ndp->ni_vp) 716 vrele(ndp->ni_vp); 717 else 718 nfs_nput(ndp->ni_vp); 719 nfs_nput(ndp->ni_dvp); 720 return (error); 721 } 722 723 /* 724 * nfs file remove rpc called from nfs_inactive 725 */ 726 nfs_removeit(ndp) 727 register struct nameidata *ndp; 728 { 729 nfsm_vars; 730 731 nfsstats.rpccnt[NFSPROC_REMOVE]++; 732 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 733 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 734 nfsm_fhtom(ndp->ni_dvp); 735 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 736 nfsm_request(ndp->ni_dvp); 737 nfsm_reqdone; 738 return (error); 739 } 740 741 /* 742 * nfs file rename call 743 */ 744 nfs_rename(sndp, tndp) 745 register struct nameidata *sndp, *tndp; 746 { 747 nfsm_vars; 748 749 nfsstats.rpccnt[NFSPROC_RENAME]++; 750 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 751 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 752 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 753 nfsm_fhtom(sndp->ni_dvp); 754 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 755 nfsm_fhtom(tndp->ni_dvp); 756 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 757 nfsm_request(sndp->ni_dvp); 758 nfsm_reqdone; 759 #ifndef notyet 760 if (sndp->ni_vp->v_type == VDIR) { 761 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 762 cache_purge(tndp->ni_dvp); 763 cache_purge(sndp->ni_dvp); 764 } 765 #endif 766 nfs_abortop(sndp); 767 nfs_abortop(tndp); 768 return (error); 769 } 770 771 /* 772 * nfs file rename rpc called from above 773 */ 774 nfs_renameit(sndp, tndp) 775 register struct nameidata *sndp, *tndp; 776 { 777 nfsm_vars; 778 779 nfsstats.rpccnt[NFSPROC_RENAME]++; 780 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 781 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 782 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 783 nfsm_fhtom(sndp->ni_dvp); 784 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 785 nfsm_fhtom(tndp->ni_dvp); 786 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 787 nfsm_request(sndp->ni_dvp); 788 nfsm_reqdone; 789 return (error); 790 } 791 792 /* 793 * nfs hard link create call 794 */ 795 nfs_link(vp, ndp) 796 struct vnode *vp; 797 register struct nameidata *ndp; 798 { 799 nfsm_vars; 800 801 if (ndp->ni_dvp != vp) 802 nfs_lock(vp); 803 nfsstats.rpccnt[NFSPROC_LINK]++; 804 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 805 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 806 nfsm_fhtom(vp); 807 nfsm_fhtom(ndp->ni_dvp); 808 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 809 nfsm_request(vp); 810 nfsm_reqdone; 811 if (ndp->ni_dvp != vp) 812 nfs_unlock(vp); 813 nfs_nput(ndp->ni_dvp); 814 return (error); 815 } 816 817 /* 818 * nfs symbolic link create call 819 */ 820 nfs_symlink(ndp, vap, nm) 821 struct nameidata *ndp; 822 struct vattr *vap; 823 char *nm; /* is this the path ?? */ 824 { 825 register struct nfsv2_sattr *sp; 826 nfsm_vars; 827 828 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 829 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 830 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 831 nfsm_fhtom(ndp->ni_dvp); 832 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 833 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 834 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 835 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 836 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 837 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 838 sp->sa_size = txdr_unsigned(VNOVAL); 839 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 840 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 841 nfsm_request(ndp->ni_dvp); 842 nfsm_reqdone; 843 nfs_nput(ndp->ni_dvp); 844 return (error); 845 } 846 847 /* 848 * nfs make dir call 849 */ 850 nfs_mkdir(ndp, vap) 851 struct nameidata *ndp; 852 struct vattr *vap; 853 { 854 register struct nfsv2_sattr *sp; 855 nfsm_vars; 856 857 nfsstats.rpccnt[NFSPROC_MKDIR]++; 858 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 859 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 860 nfsm_fhtom(ndp->ni_dvp); 861 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 862 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 863 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 864 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 865 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 866 sp->sa_size = txdr_unsigned(VNOVAL); 867 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 868 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 869 nfsm_request(ndp->ni_dvp); 870 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 871 nfsm_reqdone; 872 nfs_nput(ndp->ni_dvp); 873 return (error); 874 } 875 876 /* 877 * nfs remove directory call 878 */ 879 nfs_rmdir(ndp) 880 register struct nameidata *ndp; 881 { 882 nfsm_vars; 883 884 if (ndp->ni_dvp == ndp->ni_vp) { 885 vrele(ndp->ni_dvp); 886 nfs_nput(ndp->ni_dvp); 887 return (EINVAL); 888 } 889 nfsstats.rpccnt[NFSPROC_RMDIR]++; 890 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 891 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 892 nfsm_fhtom(ndp->ni_dvp); 893 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 894 nfsm_request(ndp->ni_dvp); 895 nfsm_reqdone; 896 #ifndef notyet 897 cache_purge(ndp->ni_dvp); 898 cache_purge(ndp->ni_vp); 899 #endif 900 nfs_nput(ndp->ni_vp); 901 nfs_nput(ndp->ni_dvp); 902 return (error); 903 } 904 905 /* 906 * nfs readdir call 907 * Although cookie is defined as opaque, I translate it to/from net byte 908 * order so that it looks more sensible. This appears consistent with the 909 * Ultrix implementation of NFS. 910 */ 911 nfs_readdir(vp, uiop, offp, cred) 912 struct vnode *vp; 913 struct uio *uiop; 914 off_t *offp; 915 struct ucred *cred; 916 { 917 register long len; 918 register struct direct *dp; 919 nfsm_vars; 920 struct mbuf *md2; 921 caddr_t dpos2; 922 int siz; 923 int more_dirs, eofflg; 924 off_t off, savoff; 925 struct direct *savdp; 926 927 nfs_lock(vp); 928 nfsstats.rpccnt[NFSPROC_READDIR]++; 929 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 930 nfsm_fhtom(vp); 931 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 932 off = *offp; 933 *p++ = txdr_unsigned(off); 934 *p = txdr_unsigned(uiop->uio_resid); 935 nfsm_request(vp); 936 siz = 0; 937 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 938 more_dirs = fxdr_unsigned(int, *p); 939 940 /* Save the position so that we can do nfsm_mtouio() later */ 941 dpos2 = dpos; 942 md2 = md; 943 944 /* loop thru the dir entries, doctoring them to 4bsd form */ 945 while (more_dirs && siz < uiop->uio_resid) { 946 savoff = off; /* Hold onto offset and dp */ 947 savdp = dp; 948 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 949 dp = (struct direct *)p; 950 dp->d_ino = fxdr_unsigned(u_long, *p++); 951 len = fxdr_unsigned(int, *p); 952 if (len <= 0 || len > NFS_MAXNAMLEN) { 953 error = EBADRPC; 954 m_freem(mrep); 955 goto nfsmout; 956 } 957 dp->d_namlen = (u_short)len; 958 len = nfsm_rndup(len); 959 nfsm_adv(len); 960 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 961 off = fxdr_unsigned(off_t, *p); 962 *p++ = 0; /* Ensures null termination of name */ 963 more_dirs = fxdr_unsigned(int, *p); 964 dp->d_reclen = len+4*NFSX_UNSIGNED; 965 siz += dp->d_reclen; 966 } 967 /* 968 * If at end of rpc data, get the eof boolean 969 */ 970 if (!more_dirs) { 971 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 972 eofflg = fxdr_unsigned(long, *p); 973 } 974 /* 975 * If there is too much to fit in the data buffer, use savoff and 976 * savdp to trim off the last record. 977 * --> we are not at eof 978 */ 979 if (siz > uiop->uio_resid) { 980 eofflg = FALSE; 981 off = savoff; 982 siz -= dp->d_reclen; 983 dp = savdp; 984 } 985 if (siz > 0) { 986 #ifdef notdef 987 if (!eofflg) 988 dp->d_reclen += (uiop->uio_resid-siz); 989 #endif 990 md = md2; 991 dpos = dpos2; 992 nfsm_mtouio(uiop, siz); 993 #ifdef notdef 994 if (!eofflg) 995 uiop->uio_resid = 0; 996 #endif 997 *offp = off; 998 } 999 nfsm_reqdone; 1000 nfs_unlock(vp); 1001 return (error); 1002 } 1003 1004 /* 1005 * nfs statfs call 1006 * (Actually a vfsop, not a vnode op) 1007 */ 1008 nfs_statfs(mp, sbp) 1009 struct mount *mp; 1010 register struct statfs *sbp; 1011 { 1012 register struct nfsv2_statfs *sfp; 1013 nfsm_vars; 1014 struct nfsmount *nmp; 1015 struct ucred *cred; 1016 struct nfsnode *np; 1017 struct vnode *vp; 1018 1019 nmp = vfs_to_nfs(mp); 1020 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 1021 return (error); 1022 vp = NFSTOV(np); 1023 nfsstats.rpccnt[NFSPROC_STATFS]++; 1024 cred = crget(); 1025 cred->cr_ngroups = 1; 1026 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1027 nfsm_fhtom(vp); 1028 nfsm_request(vp); 1029 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1030 sbp->f_type = MOUNT_NFS; 1031 sbp->f_flags = nmp->nm_flag; 1032 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1033 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1034 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1035 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1036 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1037 sbp->f_files = 0; 1038 sbp->f_ffree = 0; 1039 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1040 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1041 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1042 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1043 nfsm_reqdone; 1044 nfs_nput(vp); 1045 crfree(cred); 1046 return (error); 1047 } 1048 1049 #define HEXTOASC(x) "0123456789abcdef"[x] 1050 1051 /* 1052 * Silly rename. To make the NFS filesystem that is stateless look a little 1053 * more like the "ufs" a remove of an active vnode is translated to a rename 1054 * to a funny looking filename that is removed by nfs_inactive on the 1055 * nfsnode. There is the potential for another process on a different client 1056 * to create the same funny name between the nfs_lookitup() fails and the 1057 * nfs_rename() completes, but... 1058 */ 1059 nfs_sillyrename(ndp, flag) 1060 struct nameidata *ndp; 1061 int flag; 1062 { 1063 register struct nfsnode *np; 1064 register struct sillyrename *sp; 1065 register struct nameidata *tndp; 1066 int error; 1067 short pid; 1068 1069 np = VTONFS(ndp->ni_dvp); 1070 cache_purge(ndp->ni_dvp); 1071 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1072 M_TEMP, M_WAITOK); 1073 sp->s_flag = flag; 1074 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1075 np = VTONFS(ndp->ni_vp); 1076 tndp = &sp->s_namei; 1077 tndp->ni_cred = crdup(ndp->ni_cred); 1078 1079 /* Fudge together a funny name */ 1080 pid = u.u_procp->p_pid; 1081 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1082 tndp->ni_dent.d_namlen = 12; 1083 tndp->ni_dent.d_name[8] = HEXTOASC(pid & 0xf); 1084 tndp->ni_dent.d_name[7] = HEXTOASC((pid >> 4) & 0xf); 1085 tndp->ni_dent.d_name[6] = HEXTOASC((pid >> 8) & 0xf); 1086 tndp->ni_dent.d_name[5] = HEXTOASC((pid >> 12) & 0xf); 1087 1088 /* Try lookitups until we get one that isn't there */ 1089 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1090 tndp->ni_dent.d_name[4]++; 1091 if (tndp->ni_dent.d_name[4] > 'z') { 1092 error = EINVAL; 1093 goto bad; 1094 } 1095 } 1096 if (error = nfs_renameit(ndp, tndp)) 1097 goto bad; 1098 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1099 np->n_sillyrename = sp; 1100 return (0); 1101 bad: 1102 crfree(tndp->ni_cred); 1103 free((caddr_t)sp, M_TEMP); 1104 return (error); 1105 } 1106 1107 /* 1108 * Look up a file name for silly rename stuff. 1109 * Just like nfs_lookup() except that it doesn't load returned values 1110 * into the nfsnode table. 1111 * If fhp != NULL it copies the returned file handle out 1112 */ 1113 nfs_lookitup(vp, ndp, fhp) 1114 register struct vnode *vp; 1115 register struct nameidata *ndp; 1116 nfsv2fh_t *fhp; 1117 { 1118 nfsm_vars; 1119 long len; 1120 1121 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1122 ndp->ni_dvp = vp; 1123 ndp->ni_vp = NULL; 1124 len = ndp->ni_dent.d_namlen; 1125 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1126 nfsm_fhtom(vp); 1127 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1128 nfsm_request(vp); 1129 if (fhp != NULL) { 1130 nfsm_disect(cp, caddr_t, NFSX_FH); 1131 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1132 } 1133 nfsm_reqdone; 1134 return (error); 1135 } 1136 1137 /* 1138 * Kludge City.. 1139 * - make nfs_bmap() essentially a no-op that does no translation 1140 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1141 * after mapping the physical addresses into Kernel Virtual space in the 1142 * nfsiobuf area. 1143 * (Maybe I could use the process's page mapping, but I was concerned that 1144 * Kernel Write might not be enabled and also figured copyout() would do 1145 * a lot more work than bcopy() and also it currently happens in the 1146 * context of the swapper process (2). 1147 */ 1148 nfs_bmap(vp, bn, vpp, bnp) 1149 struct vnode *vp; 1150 daddr_t bn; 1151 struct vnode **vpp; 1152 daddr_t *bnp; 1153 { 1154 if (vpp != NULL) 1155 *vpp = vp; 1156 if (bnp != NULL) 1157 *bnp = bn * btodb(vp->v_mount->m_bsize); 1158 return (0); 1159 } 1160 1161 /* 1162 * Strategy routine for phys. i/o 1163 * If the biod's are running, queue a request 1164 * otherwise just call nfs_doio() to get it done 1165 */ 1166 nfs_strategy(bp) 1167 register struct buf *bp; 1168 { 1169 register struct buf *dp; 1170 register int i; 1171 struct proc *rp; 1172 int error = 0; 1173 int fnd = 0; 1174 1175 /* 1176 * If an i/o daemon is waiting 1177 * queue the request, wake it up and wait for completion 1178 * otherwise just do it ourselves 1179 */ 1180 for (i = 0; i < nfs_asyncdaemons; i++) { 1181 if (rp = nfs_iodwant[i]) { 1182 /* 1183 * Ensure that the async_daemon is still waiting here 1184 */ 1185 if (rp->p_stat != SSLEEP || 1186 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1187 nfs_iodwant[i] = (struct proc *)0; 1188 continue; 1189 } 1190 dp = &nfs_bqueue; 1191 if (dp->b_actf == NULL) { 1192 dp->b_actl = bp; 1193 bp->b_actf = dp; 1194 } else { 1195 dp->b_actf->b_actl = bp; 1196 bp->b_actf = dp->b_actf; 1197 } 1198 dp->b_actf = bp; 1199 bp->b_actl = dp; 1200 fnd++; 1201 nfs_iodwant[i] = (struct proc *)0; 1202 wakeup((caddr_t)&nfs_iodwant[i]); 1203 break; 1204 } 1205 } 1206 if (!fnd) 1207 error = nfs_doio(bp); 1208 return (error); 1209 } 1210 1211 /* 1212 * Fun and games with i/o 1213 * Essentially play ubasetup() and disk interrupt service routine by 1214 * mapping the data buffer into kernel virtual space and doing the 1215 * nfs read or write rpc's from it. 1216 * If the biod's are not running, this is just called from nfs_strategy(), 1217 * otherwise it is called by the biod's to do what would normally be 1218 * partially disk interrupt driven. 1219 */ 1220 nfs_doio(bp) 1221 register struct buf *bp; 1222 { 1223 register struct pte *pte, *ppte; 1224 register caddr_t vaddr; 1225 register struct uio *uiop; 1226 register struct vnode *vp; 1227 struct nfsnode *np; 1228 struct ucred *cr; 1229 int npf, npf2; 1230 int reg; 1231 caddr_t vbase; 1232 caddr_t addr; 1233 unsigned v; 1234 struct proc *rp; 1235 int o, error; 1236 int bcnt; 1237 off_t off; 1238 struct uio uio; 1239 struct iovec io; 1240 1241 vp = bp->b_vp; 1242 uiop = &uio; 1243 uiop->uio_iov = &io; 1244 uiop->uio_iovcnt = 1; 1245 uiop->uio_segflg = UIO_SYSSPACE; 1246 if (bp->b_flags & B_READ) { 1247 io.iov_len = uiop->uio_resid = bp->b_bcount; 1248 uiop->uio_offset = off = bp->b_blkno*DEV_BSIZE; 1249 addr = bp->b_un.b_addr; 1250 bcnt = bp->b_bcount; 1251 } else { 1252 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1253 uiop->uio_offset = off = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1254 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1255 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1256 } 1257 /* 1258 * For phys i/o, map the b_addr into kernel virtual space using 1259 * the Nfsiomap pte's 1260 * Also, add a temporary b_rcred for reading using the process's uid 1261 * and a guess at a group 1262 */ 1263 if (bp->b_flags & B_PHYS) { 1264 VTONFS(vp)->n_flag |= NPAGEDON; 1265 bp->b_rcred = cr = crget(); 1266 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1267 cr->cr_uid = rp->p_uid; 1268 cr->cr_gid = 0; /* Anything ?? */ 1269 cr->cr_ngroups = 1; 1270 o = (int)addr & PGOFSET; 1271 npf2 = npf = btoc(bcnt + o); 1272 /* 1273 * Get some mapping page table entries 1274 */ 1275 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1276 nfsmap_want++; 1277 sleep((caddr_t)&nfsmap_want, PZERO-1); 1278 } 1279 reg--; 1280 /* I know it is always the else, but that may change someday */ 1281 if ((bp->b_flags & B_PHYS) == 0) 1282 pte = kvtopte(bp->b_un.b_addr); 1283 else if (bp->b_flags & B_PAGET) 1284 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1285 else { 1286 v = btop(bp->b_un.b_addr); 1287 if (bp->b_flags & B_UAREA) 1288 pte = &rp->p_addr[v]; 1289 else 1290 pte = vtopte(rp, v); 1291 } 1292 /* 1293 * Play vmaccess() but with the Nfsiomap page table 1294 */ 1295 ppte = &Nfsiomap[reg]; 1296 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1297 while (npf != 0) { 1298 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1299 #if defined(tahoe) 1300 mtpr(P1DC, vaddr); 1301 #endif 1302 ppte++; 1303 pte++; 1304 vaddr += NBPG; 1305 --npf; 1306 } 1307 io.iov_base = vbase+o; 1308 } else { 1309 io.iov_base = addr; 1310 } 1311 if (bp->b_flags & B_READ) { 1312 uiop->uio_rw = UIO_READ; 1313 bp->b_error = error = nfs_readrpc(vp, uiop, &off, bp->b_rcred); 1314 } else { 1315 uiop->uio_rw = UIO_WRITE; 1316 bp->b_error = error = nfs_writerpc(vp, uiop, &off, bp->b_wcred); 1317 if (error) { 1318 np = VTONFS(vp); 1319 np->n_error = error; 1320 np->n_flag |= NWRITEERR; 1321 } 1322 bp->b_dirtyoff = bp->b_dirtyend = 0; 1323 } 1324 if (error) 1325 bp->b_flags |= B_ERROR; 1326 bp->b_resid = uiop->uio_resid; 1327 /* 1328 * Release pte's used by physical i/o 1329 */ 1330 if (bp->b_flags & B_PHYS) { 1331 crfree(cr); 1332 rmfree(nfsmap, (long)npf2, (long)++reg); 1333 if (nfsmap_want) { 1334 nfsmap_want = 0; 1335 wakeup((caddr_t)&nfsmap_want); 1336 } 1337 } 1338 biodone(bp); 1339 return (error); 1340 } 1341 1342 /* 1343 * Flush all the blocks associated with a vnode. 1344 * Walk through the buffer pool and push any dirty pages 1345 * associated with the vnode. 1346 */ 1347 nfs_fsync(vp, fflags, cred) 1348 register struct vnode *vp; 1349 int fflags; 1350 struct ucred *cred; 1351 { 1352 register struct nfsnode *np = VTONFS(vp); 1353 int error; 1354 1355 nfs_lock(vp); 1356 if (np->n_flag & NMODIFIED) { 1357 np->n_flag &= ~NMODIFIED; 1358 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1359 } 1360 nfs_unlock(vp); 1361 return (error); 1362 } 1363