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 7.15 (Berkeley) 11/22/89 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_mknod(), 64 nfs_open(), 65 nfs_close(), 66 nfs_access(), 67 nfs_getattr(), 68 nfs_setattr(), 69 nfs_read(), 70 nfs_write(), 71 vfs_noop(), 72 vfs_nullop(), 73 nfs_remove(), 74 nfs_link(), 75 nfs_rename(), 76 nfs_mkdir(), 77 nfs_rmdir(), 78 nfs_symlink(), 79 nfs_readdir(), 80 nfs_readlink(), 81 nfs_abortop(), 82 nfs_lock(), 83 nfs_unlock(), 84 nfs_bmap(), 85 nfs_strategy(), 86 nfs_fsync(), 87 nfs_inactive(), 88 nfs_reclaim(); 89 90 struct vnodeops nfsv2_vnodeops = { 91 nfs_lookup, 92 nfs_create, 93 nfs_mknod, 94 nfs_open, 95 nfs_close, 96 nfs_access, 97 nfs_getattr, 98 nfs_setattr, 99 nfs_read, 100 nfs_write, 101 vfs_noop, 102 vfs_noop, 103 vfs_noop, 104 nfs_fsync, 105 vfs_nullop, 106 nfs_remove, 107 nfs_link, 108 nfs_rename, 109 nfs_mkdir, 110 nfs_rmdir, 111 nfs_symlink, 112 nfs_readdir, 113 nfs_readlink, 114 nfs_abortop, 115 nfs_inactive, 116 nfs_reclaim, 117 nfs_lock, 118 nfs_unlock, 119 nfs_bmap, 120 nfs_strategy, 121 }; 122 123 /* Special device vnode ops */ 124 int spec_lookup(), 125 spec_open(), 126 spec_read(), 127 spec_write(), 128 spec_strategy(), 129 spec_ioctl(), 130 spec_select(), 131 spec_close(), 132 spec_badop(), 133 spec_nullop(); 134 135 struct vnodeops spec_nfsv2nodeops = { 136 spec_lookup, 137 spec_badop, 138 spec_badop, 139 spec_open, 140 spec_close, 141 nfs_access, 142 nfs_getattr, 143 nfs_setattr, 144 spec_read, 145 spec_write, 146 spec_ioctl, 147 spec_select, 148 spec_badop, 149 spec_nullop, 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 spec_badop, 160 nfs_inactive, 161 nfs_reclaim, 162 nfs_lock, 163 nfs_unlock, 164 spec_badop, 165 spec_strategy, 166 }; 167 168 extern u_long nfs_procids[NFS_NPROCS]; 169 extern u_long nfs_prog, nfs_vers; 170 extern char nfsiobuf[MAXPHYS+NBPG]; 171 struct map nfsmap[NFS_MSIZ]; 172 enum vtype v_type[NFLNK+1]; 173 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 174 int nfs_asyncdaemons = 0; 175 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 176 static int nfsmap_want = 0; 177 178 /* 179 * nfs null call from vfs. 180 */ 181 nfs_null(vp, cred) 182 struct vnode *vp; 183 struct ucred *cred; 184 { 185 caddr_t bpos, dpos; 186 u_long xid; 187 int error = 0; 188 struct mbuf *mreq, *mrep, *md, *mb; 189 190 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 191 nfsm_request(vp); 192 nfsm_reqdone; 193 return (error); 194 } 195 196 /* 197 * nfs access vnode op. 198 * Essentially just get vattr and then imitate iaccess() 199 */ 200 nfs_access(vp, mode, cred) 201 struct vnode *vp; 202 int mode; 203 register struct ucred *cred; 204 { 205 register struct vattr *vap; 206 register gid_t *gp; 207 struct vattr vattr; 208 register int i; 209 int error; 210 211 /* 212 * If you're the super-user, 213 * you always get access. 214 */ 215 if (cred->cr_uid == 0) 216 return (0); 217 vap = &vattr; 218 if (error = nfs_getattr(vp, vap, cred)) 219 return (error); 220 /* 221 * Access check is based on only one of owner, group, public. 222 * If not owner, then check group. If not a member of the 223 * group, then check public access. 224 */ 225 if (cred->cr_uid != vap->va_uid) { 226 mode >>= 3; 227 gp = cred->cr_groups; 228 for (i = 0; i < cred->cr_ngroups; i++, gp++) 229 if (vap->va_gid == *gp) 230 goto found; 231 mode >>= 3; 232 found: 233 ; 234 } 235 if ((vap->va_mode & mode) != 0) 236 return (0); 237 return (EACCES); 238 } 239 240 /* 241 * nfs open vnode op 242 * Just check to see if the type is ok 243 */ 244 /* ARGSUSED */ 245 nfs_open(vp, mode, cred) 246 struct vnode *vp; 247 int mode; 248 struct ucred *cred; 249 { 250 register enum vtype vtyp; 251 252 vtyp = vp->v_type; 253 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 254 return (0); 255 else 256 return (EACCES); 257 } 258 259 /* 260 * nfs close vnode op 261 * For reg files, invalidate any buffer cache entries. 262 */ 263 /* ARGSUSED */ 264 nfs_close(vp, fflags, cred) 265 register struct vnode *vp; 266 int fflags; 267 struct ucred *cred; 268 { 269 register struct nfsnode *np = VTONFS(vp); 270 int error = 0; 271 272 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 273 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 274 nfs_lock(vp); 275 np->n_flag &= ~(NMODIFIED|NBUFFERED); 276 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 277 if (np->n_flag & NWRITEERR) { 278 np->n_flag &= ~NWRITEERR; 279 if (!error) 280 error = np->n_error ? np->n_error : EIO; 281 } 282 nfs_unlock(vp); 283 } 284 return (error); 285 } 286 287 /* 288 * nfs getattr call from vfs. 289 */ 290 nfs_getattr(vp, vap, cred) 291 register struct vnode *vp; 292 struct vattr *vap; 293 struct ucred *cred; 294 { 295 register caddr_t cp; 296 register long t1; 297 caddr_t bpos, dpos; 298 u_long xid; 299 int error = 0; 300 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 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 register struct vnode *vp; 319 register struct vattr *vap; 320 struct ucred *cred; 321 { 322 register struct nfsv2_sattr *sp; 323 register caddr_t cp; 324 register long t1; 325 caddr_t bpos, dpos; 326 u_long xid; 327 int error = 0; 328 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 329 struct nfsnode *np; 330 331 nfsstats.rpccnt[NFSPROC_SETATTR]++; 332 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 333 nfsm_fhtom(vp); 334 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 335 if (vap->va_mode == 0xffff) 336 sp->sa_mode = VNOVAL; 337 else 338 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 339 if (vap->va_uid == 0xffff) 340 sp->sa_uid = VNOVAL; 341 else 342 sp->sa_uid = txdr_unsigned(vap->va_uid); 343 if (vap->va_gid == 0xffff) 344 sp->sa_gid = VNOVAL; 345 else 346 sp->sa_gid = txdr_unsigned(vap->va_gid); 347 sp->sa_size = txdr_unsigned(vap->va_size); 348 if (vap->va_size != VNOVAL) { 349 np = VTONFS(vp); 350 if (np->n_flag & NMODIFIED) { 351 np->n_flag &= ~NMODIFIED; 352 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 353 } 354 } 355 txdr_time(&vap->va_atime, &sp->sa_atime); 356 txdr_time(&vap->va_mtime, &sp->sa_mtime); 357 nfsm_request(vp); 358 nfsm_loadattr(vp, (struct vattr *)0); 359 /* should we fill in any vap fields ?? */ 360 nfsm_reqdone; 361 return (error); 362 } 363 364 /* 365 * nfs lookup call, one step at a time... 366 * First look in cache 367 * If not found, unlock the directory nfsnode and do the rpc 368 */ 369 nfs_lookup(vp, ndp) 370 register struct vnode *vp; 371 register struct nameidata *ndp; 372 { 373 register struct vnode *vdp; 374 register u_long *p; 375 register caddr_t cp; 376 register long t1, t2; 377 caddr_t bpos, dpos, cp2; 378 u_long xid; 379 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 380 struct vnode *newvp; 381 long len; 382 nfsv2fh_t *fhp; 383 struct nfsnode *np; 384 int lockparent, wantparent, flag, error = 0; 385 386 ndp->ni_dvp = vp; 387 ndp->ni_vp = NULL; 388 if (vp->v_type != VDIR) 389 return (ENOTDIR); 390 lockparent = ndp->ni_nameiop & LOCKPARENT; 391 flag = ndp->ni_nameiop & OPFLAG; 392 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 393 if ((error = cache_lookup(ndp)) && error != ENOENT) { 394 struct vattr vattr; 395 int vpid; 396 397 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 398 panic("nfs_lookup: .. through root"); 399 vdp = ndp->ni_vp; 400 vpid = vdp->v_id; 401 /* 402 * See the comment starting `Step through' in ufs/ufs_lookup.c 403 * for an explanation of the locking protocol 404 */ 405 if (vp == vdp) { 406 VREF(vdp); 407 error = 0; 408 } else if (ndp->ni_isdotdot) { 409 nfs_unlock(vp); 410 error = vget(vdp); 411 } else { 412 error = vget(vdp); 413 nfs_unlock(vp); 414 } 415 if (!error) { 416 if (vpid == vdp->v_id && 417 !nfs_getattr(vdp, &vattr, ndp->ni_cred)) { 418 nfsstats.lookupcache_hits++; 419 return (0); 420 } else { 421 nfs_nput(vdp); 422 } 423 } 424 nfs_lock(vp); 425 ndp->ni_vp = (struct vnode *)0; 426 } 427 error = 0; 428 nfsstats.lookupcache_misses++; 429 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 430 len = ndp->ni_namelen; 431 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 432 nfsm_fhtom(vp); 433 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 434 nfsm_request(vp); 435 nfsmout: 436 if (error) { 437 if ((flag == CREATE || flag == RENAME) && 438 *ndp->ni_next == 0) { 439 if (!lockparent) 440 nfs_unlock(vp); 441 } 442 return (ENOENT); 443 } 444 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 445 446 /* 447 * Handle DELETE and RENAME cases... 448 */ 449 if (flag == DELETE && *ndp->ni_next == 0) { 450 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 451 VREF(vp); 452 newvp = vp; 453 np = VTONFS(vp); 454 } else { 455 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 456 m_freem(mrep); 457 return (error); 458 } 459 newvp = NFSTOV(np); 460 } 461 if (error = 462 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 463 if (newvp != vp) 464 nfs_nput(newvp); 465 else 466 vrele(vp); 467 m_freem(mrep); 468 return (error); 469 } 470 ndp->ni_vp = newvp; 471 if (!lockparent) 472 nfs_unlock(vp); 473 m_freem(mrep); 474 return (0); 475 } 476 477 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 478 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 479 m_freem(mrep); 480 return (EISDIR); 481 } 482 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 483 m_freem(mrep); 484 return (error); 485 } 486 newvp = NFSTOV(np); 487 if (error = 488 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 489 nfs_nput(newvp); 490 m_freem(mrep); 491 return (error); 492 } 493 ndp->ni_vp = newvp; 494 if (!lockparent) 495 nfs_unlock(vp); 496 return (0); 497 } 498 499 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 500 VREF(vp); 501 newvp = vp; 502 np = VTONFS(vp); 503 } else if (ndp->ni_isdotdot) { 504 nfs_unlock(vp); 505 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 506 nfs_lock(vp); 507 m_freem(mrep); 508 return (error); 509 } 510 nfs_lock(vp); 511 newvp = NFSTOV(np); 512 } else { 513 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 514 m_freem(mrep); 515 return (error); 516 } 517 newvp = NFSTOV(np); 518 } 519 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 520 if (newvp != vp) 521 nfs_nput(newvp); 522 else 523 vrele(vp); 524 m_freem(mrep); 525 return (error); 526 } 527 m_freem(mrep); 528 529 if (vp != newvp && (!lockparent || *ndp->ni_next != '\0')) 530 nfs_unlock(vp); 531 ndp->ni_vp = newvp; 532 if (error == 0 && ndp->ni_makeentry) 533 cache_enter(ndp); 534 return (error); 535 } 536 537 /* 538 * nfs readlink call 539 */ 540 nfs_readlink(vp, uiop, cred) 541 register struct vnode *vp; 542 struct uio *uiop; 543 struct ucred *cred; 544 { 545 register u_long *p; 546 register caddr_t cp; 547 register long t1; 548 caddr_t bpos, dpos, cp2; 549 u_long xid; 550 int error = 0; 551 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 552 long len; 553 554 nfsstats.rpccnt[NFSPROC_READLINK]++; 555 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 556 nfsm_fhtom(vp); 557 nfsm_request(vp); 558 nfsm_strsiz(len, NFS_MAXPATHLEN); 559 nfsm_mtouio(uiop, len); 560 nfsm_reqdone; 561 return (error); 562 } 563 564 /* 565 * nfs read call 566 */ 567 nfs_readrpc(vp, uiop, cred) 568 register struct vnode *vp; 569 struct uio *uiop; 570 struct ucred *cred; 571 { 572 register u_long *p; 573 register caddr_t cp; 574 register long t1; 575 caddr_t bpos, dpos, cp2; 576 u_long xid; 577 int error = 0; 578 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 579 struct nfsmount *nmp; 580 long len, retlen, tsiz; 581 582 nmp = vfs_to_nfs(vp->v_mount); 583 tsiz = uiop->uio_resid; 584 while (tsiz > 0) { 585 nfsstats.rpccnt[NFSPROC_READ]++; 586 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 587 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 588 nfsm_fhtom(vp); 589 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 590 *p++ = txdr_unsigned(uiop->uio_offset); 591 *p++ = txdr_unsigned(len); 592 *p = 0; 593 nfsm_request(vp); 594 nfsm_loadattr(vp, (struct vattr *)0); 595 nfsm_strsiz(retlen, nmp->nm_rsize); 596 nfsm_mtouio(uiop, retlen); 597 m_freem(mrep); 598 if (retlen < len) 599 tsiz = 0; 600 else 601 tsiz -= len; 602 } 603 nfsmout: 604 return (error); 605 } 606 607 /* 608 * nfs write call 609 */ 610 nfs_writerpc(vp, uiop, cred) 611 register struct vnode *vp; 612 struct uio *uiop; 613 struct ucred *cred; 614 { 615 register u_long *p; 616 register caddr_t cp; 617 register long t1; 618 caddr_t bpos, dpos; 619 u_long xid; 620 int error = 0; 621 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 622 struct nfsmount *nmp; 623 long len, tsiz; 624 625 nmp = vfs_to_nfs(vp->v_mount); 626 tsiz = uiop->uio_resid; 627 while (tsiz > 0) { 628 nfsstats.rpccnt[NFSPROC_WRITE]++; 629 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 630 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 631 NFSX_FH+NFSX_UNSIGNED*4); 632 nfsm_fhtom(vp); 633 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 634 *(p+1) = txdr_unsigned(uiop->uio_offset); 635 *(p+3) = txdr_unsigned(len); 636 nfsm_uiotom(uiop, len); 637 nfsm_request(vp); 638 nfsm_loadattr(vp, (struct vattr *)0); 639 m_freem(mrep); 640 tsiz -= len; 641 } 642 nfsmout: 643 return (error); 644 } 645 646 /* 647 * nfs mknod call 648 * This call is currently not supported. 649 */ 650 /* ARGSUSED */ 651 nfs_mknod(ndp, vap, cred) 652 struct nameidata *ndp; 653 struct ucred *cred; 654 struct vattr *vap; 655 { 656 657 nfs_abortop(ndp); 658 return (EOPNOTSUPP); 659 } 660 661 /* 662 * nfs file create call 663 */ 664 nfs_create(ndp, vap) 665 register struct nameidata *ndp; 666 register struct vattr *vap; 667 { 668 register struct nfsv2_sattr *sp; 669 register u_long *p; 670 register caddr_t cp; 671 register long t1, t2; 672 caddr_t bpos, dpos, cp2; 673 u_long xid; 674 int error = 0; 675 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 676 677 nfsstats.rpccnt[NFSPROC_CREATE]++; 678 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 679 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 680 nfsm_fhtom(ndp->ni_dvp); 681 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 682 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 683 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 684 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 685 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 686 sp->sa_size = txdr_unsigned(0); 687 /* or should these be VNOVAL ?? */ 688 txdr_time(&vap->va_atime, &sp->sa_atime); 689 txdr_time(&vap->va_mtime, &sp->sa_mtime); 690 nfsm_request(ndp->ni_dvp); 691 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 692 nfsm_reqdone; 693 nfs_nput(ndp->ni_dvp); 694 return (error); 695 } 696 697 /* 698 * nfs file remove call 699 * To try and make nfs semantics closer to vfs semantics, a file that has 700 * other references to the vnode is renamed instead of removed and then 701 * removed later on the last close. 702 * Unfortunately you must flush the buffer cache and cmap to get rid of 703 * all extraneous vnode references before you check the reference cnt. 704 * 1 - If the file could have blocks in the buffer cache 705 * flush them out and invalidate them 706 * mpurge the vnode to flush out cmap references 707 * (This is necessary to update the vnode ref cnt as well as sensible 708 * for actual removes, to free up the buffers) 709 * 2 - If v_count > 1 710 * If a rename is not already in the works 711 * call nfs_sillyrename() to set it up 712 * else 713 * do the remove rpc 714 */ 715 nfs_remove(ndp) 716 register struct nameidata *ndp; 717 { 718 register struct vnode *vp = ndp->ni_vp; 719 register struct nfsnode *np = VTONFS(ndp->ni_vp); 720 register u_long *p; 721 register caddr_t cp; 722 register long t1, t2; 723 caddr_t bpos, dpos; 724 u_long xid; 725 int error = 0; 726 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 727 728 if (vp->v_type == VREG) { 729 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 730 np->n_flag &= ~(NMODIFIED|NBUFFERED); 731 nfs_blkflush(vp, (daddr_t)0, np->n_size, TRUE); 732 } 733 if (np->n_flag & NPAGEDON) 734 mpurge(vp); /* In case cmap entries still ref it */ 735 } 736 if (vp->v_count > 1) { 737 if (!np->n_sillyrename) 738 error = nfs_sillyrename(ndp, REMOVE); 739 } else { 740 nfsstats.rpccnt[NFSPROC_REMOVE]++; 741 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 742 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 743 nfsm_fhtom(ndp->ni_dvp); 744 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 745 nfsm_request(ndp->ni_dvp); 746 nfsm_reqdone; 747 } 748 if (ndp->ni_dvp == ndp->ni_vp) 749 vrele(ndp->ni_vp); 750 else 751 nfs_nput(ndp->ni_vp); 752 nfs_nput(ndp->ni_dvp); 753 return (error); 754 } 755 756 /* 757 * nfs file remove rpc called from nfs_inactive 758 */ 759 nfs_removeit(ndp) 760 register struct nameidata *ndp; 761 { 762 register u_long *p; 763 register caddr_t cp; 764 register long t1, t2; 765 caddr_t bpos, dpos; 766 u_long xid; 767 int error = 0; 768 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 769 770 nfsstats.rpccnt[NFSPROC_REMOVE]++; 771 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 772 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 773 nfsm_fhtom(ndp->ni_dvp); 774 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 775 nfsm_request(ndp->ni_dvp); 776 nfsm_reqdone; 777 return (error); 778 } 779 780 /* 781 * nfs file rename call 782 */ 783 nfs_rename(sndp, tndp) 784 register struct nameidata *sndp, *tndp; 785 { 786 register u_long *p; 787 register caddr_t cp; 788 register long t1, t2; 789 caddr_t bpos, dpos; 790 u_long xid; 791 int error = 0; 792 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 793 794 nfsstats.rpccnt[NFSPROC_RENAME]++; 795 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 796 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 797 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 798 nfsm_fhtom(sndp->ni_dvp); 799 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 800 nfsm_fhtom(tndp->ni_dvp); 801 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 802 nfsm_request(sndp->ni_dvp); 803 nfsm_reqdone; 804 if (sndp->ni_vp->v_type == VDIR) { 805 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 806 cache_purge(tndp->ni_dvp); 807 cache_purge(sndp->ni_dvp); 808 } 809 nfs_abortop(sndp); 810 nfs_abortop(tndp); 811 return (error); 812 } 813 814 /* 815 * nfs file rename rpc called from above 816 */ 817 nfs_renameit(sndp, tndp) 818 register struct nameidata *sndp, *tndp; 819 { 820 register u_long *p; 821 register caddr_t cp; 822 register long t1, t2; 823 caddr_t bpos, dpos; 824 u_long xid; 825 int error = 0; 826 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 827 828 nfsstats.rpccnt[NFSPROC_RENAME]++; 829 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 830 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 831 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 832 nfsm_fhtom(sndp->ni_dvp); 833 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 834 nfsm_fhtom(tndp->ni_dvp); 835 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 836 nfsm_request(sndp->ni_dvp); 837 nfsm_reqdone; 838 return (error); 839 } 840 841 /* 842 * nfs hard link create call 843 */ 844 nfs_link(vp, ndp) 845 register struct vnode *vp; 846 register struct nameidata *ndp; 847 { 848 register u_long *p; 849 register caddr_t cp; 850 register long t1, t2; 851 caddr_t bpos, dpos; 852 u_long xid; 853 int error = 0; 854 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 855 856 if (ndp->ni_dvp != vp) 857 nfs_lock(vp); 858 nfsstats.rpccnt[NFSPROC_LINK]++; 859 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 860 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 861 nfsm_fhtom(vp); 862 nfsm_fhtom(ndp->ni_dvp); 863 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 864 nfsm_request(vp); 865 nfsm_reqdone; 866 if (ndp->ni_dvp != vp) 867 nfs_unlock(vp); 868 nfs_nput(ndp->ni_dvp); 869 return (error); 870 } 871 872 /* 873 * nfs symbolic link create call 874 */ 875 nfs_symlink(ndp, vap, nm) 876 struct nameidata *ndp; 877 struct vattr *vap; 878 char *nm; /* is this the path ?? */ 879 { 880 register struct nfsv2_sattr *sp; 881 register u_long *p; 882 register caddr_t cp; 883 register long t1, t2; 884 caddr_t bpos, dpos; 885 u_long xid; 886 int error = 0; 887 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 888 889 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 890 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 891 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 892 nfsm_fhtom(ndp->ni_dvp); 893 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 894 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 895 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 896 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 897 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 898 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 899 sp->sa_size = txdr_unsigned(VNOVAL); 900 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 901 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 902 nfsm_request(ndp->ni_dvp); 903 nfsm_reqdone; 904 nfs_nput(ndp->ni_dvp); 905 return (error); 906 } 907 908 /* 909 * nfs make dir call 910 */ 911 nfs_mkdir(ndp, vap) 912 register struct nameidata *ndp; 913 struct vattr *vap; 914 { 915 register struct nfsv2_sattr *sp; 916 register u_long *p; 917 register caddr_t cp; 918 register long t1, t2; 919 caddr_t bpos, dpos, cp2; 920 u_long xid; 921 int error = 0; 922 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 923 924 nfsstats.rpccnt[NFSPROC_MKDIR]++; 925 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 926 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 927 nfsm_fhtom(ndp->ni_dvp); 928 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 929 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 930 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 931 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 932 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 933 sp->sa_size = txdr_unsigned(VNOVAL); 934 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 935 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 936 nfsm_request(ndp->ni_dvp); 937 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 938 nfsm_reqdone; 939 nfs_nput(ndp->ni_dvp); 940 return (error); 941 } 942 943 /* 944 * nfs remove directory call 945 */ 946 nfs_rmdir(ndp) 947 register struct nameidata *ndp; 948 { 949 register u_long *p; 950 register caddr_t cp; 951 register long t1, t2; 952 caddr_t bpos, dpos; 953 u_long xid; 954 int error = 0; 955 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 956 957 if (ndp->ni_dvp == ndp->ni_vp) { 958 vrele(ndp->ni_dvp); 959 nfs_nput(ndp->ni_dvp); 960 return (EINVAL); 961 } 962 nfsstats.rpccnt[NFSPROC_RMDIR]++; 963 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 964 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 965 nfsm_fhtom(ndp->ni_dvp); 966 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 967 nfsm_request(ndp->ni_dvp); 968 nfsm_reqdone; 969 cache_purge(ndp->ni_dvp); 970 cache_purge(ndp->ni_vp); 971 nfs_nput(ndp->ni_vp); 972 nfs_nput(ndp->ni_dvp); 973 return (error); 974 } 975 976 /* 977 * nfs readdir call 978 * Although cookie is defined as opaque, I translate it to/from net byte 979 * order so that it looks more sensible. This appears consistent with the 980 * Ultrix implementation of NFS. 981 */ 982 nfs_readdir(vp, uiop, cred) 983 register struct vnode *vp; 984 struct uio *uiop; 985 struct ucred *cred; 986 { 987 register long len; 988 register struct direct *dp; 989 register u_long *p; 990 register caddr_t cp; 991 register long t1; 992 caddr_t bpos, dpos, cp2; 993 u_long xid; 994 int error = 0; 995 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 996 struct mbuf *md2; 997 caddr_t dpos2; 998 int siz; 999 int more_dirs; 1000 off_t off, savoff; 1001 struct direct *savdp; 1002 1003 nfsstats.rpccnt[NFSPROC_READDIR]++; 1004 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1005 nfsm_fhtom(vp); 1006 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1007 *p++ = txdr_unsigned(uiop->uio_offset); 1008 *p = txdr_unsigned(uiop->uio_resid); 1009 nfsm_request(vp); 1010 siz = 0; 1011 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1012 more_dirs = fxdr_unsigned(int, *p); 1013 1014 /* Save the position so that we can do nfsm_mtouio() later */ 1015 dpos2 = dpos; 1016 md2 = md; 1017 1018 /* loop thru the dir entries, doctoring them to 4bsd form */ 1019 savoff = off = 0; 1020 savdp = dp = NULL; 1021 while (more_dirs && siz < uiop->uio_resid) { 1022 savoff = off; /* Hold onto offset and dp */ 1023 savdp = dp; 1024 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1025 dp = (struct direct *)p; 1026 dp->d_ino = fxdr_unsigned(u_long, *p++); 1027 len = fxdr_unsigned(int, *p); 1028 if (len <= 0 || len > NFS_MAXNAMLEN) { 1029 error = EBADRPC; 1030 m_freem(mrep); 1031 goto nfsmout; 1032 } 1033 dp->d_namlen = (u_short)len; 1034 len = nfsm_rndup(len); 1035 nfsm_adv(len); 1036 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1037 off = fxdr_unsigned(off_t, *p); 1038 *p++ = 0; /* Ensures null termination of name */ 1039 more_dirs = fxdr_unsigned(int, *p); 1040 dp->d_reclen = len+4*NFSX_UNSIGNED; 1041 siz += dp->d_reclen; 1042 } 1043 /* 1044 * If at end of rpc data, get the eof boolean 1045 */ 1046 if (!more_dirs) 1047 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1048 /* 1049 * If there is too much to fit in the data buffer, use savoff and 1050 * savdp to trim off the last record. 1051 * --> we are not at eof 1052 */ 1053 if (siz > uiop->uio_resid) { 1054 off = savoff; 1055 siz -= dp->d_reclen; 1056 dp = savdp; 1057 } 1058 if (siz > 0) { 1059 md = md2; 1060 dpos = dpos2; 1061 nfsm_mtouio(uiop, siz); 1062 uiop->uio_offset = off; 1063 } 1064 nfsm_reqdone; 1065 return (error); 1066 } 1067 1068 /* 1069 * nfs statfs call 1070 * (Actually a vfsop, not a vnode op) 1071 */ 1072 nfs_statfs(mp, sbp) 1073 struct mount *mp; 1074 register struct statfs *sbp; 1075 { 1076 register struct vnode *vp; 1077 register struct nfsv2_statfs *sfp; 1078 register caddr_t cp; 1079 register long t1; 1080 caddr_t bpos, dpos, cp2; 1081 u_long xid; 1082 int error = 0; 1083 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1084 struct nfsmount *nmp; 1085 struct ucred *cred; 1086 struct nfsnode *np; 1087 1088 nmp = vfs_to_nfs(mp); 1089 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 1090 return (error); 1091 vp = NFSTOV(np); 1092 nfsstats.rpccnt[NFSPROC_STATFS]++; 1093 cred = crget(); 1094 cred->cr_ngroups = 1; 1095 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1096 nfsm_fhtom(vp); 1097 nfsm_request(vp); 1098 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1099 sbp->f_type = MOUNT_NFS; 1100 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1101 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1102 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1103 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1104 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1105 sbp->f_files = 0; 1106 sbp->f_ffree = 0; 1107 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1108 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1109 nfsm_reqdone; 1110 nfs_nput(vp); 1111 crfree(cred); 1112 return (error); 1113 } 1114 1115 static char hextoasc[] = "0123456789abcdef"; 1116 1117 /* 1118 * Silly rename. To make the NFS filesystem that is stateless look a little 1119 * more like the "ufs" a remove of an active vnode is translated to a rename 1120 * to a funny looking filename that is removed by nfs_inactive on the 1121 * nfsnode. There is the potential for another process on a different client 1122 * to create the same funny name between the nfs_lookitup() fails and the 1123 * nfs_rename() completes, but... 1124 */ 1125 nfs_sillyrename(ndp, flag) 1126 register struct nameidata *ndp; 1127 int flag; 1128 { 1129 register struct nfsnode *np; 1130 register struct sillyrename *sp; 1131 register struct nameidata *tndp; 1132 int error; 1133 short pid; 1134 1135 np = VTONFS(ndp->ni_dvp); 1136 cache_purge(ndp->ni_dvp); 1137 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1138 M_TEMP, M_WAITOK); 1139 sp->s_flag = flag; 1140 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1141 np = VTONFS(ndp->ni_vp); 1142 tndp = &sp->s_namei; 1143 tndp->ni_cred = crdup(ndp->ni_cred); 1144 1145 /* Fudge together a funny name */ 1146 pid = u.u_procp->p_pid; 1147 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1148 tndp->ni_dent.d_namlen = 12; 1149 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1150 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1151 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1152 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1153 1154 /* Try lookitups until we get one that isn't there */ 1155 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1156 tndp->ni_dent.d_name[4]++; 1157 if (tndp->ni_dent.d_name[4] > 'z') { 1158 error = EINVAL; 1159 goto bad; 1160 } 1161 } 1162 if (error = nfs_renameit(ndp, tndp)) 1163 goto bad; 1164 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1165 np->n_sillyrename = sp; 1166 return (0); 1167 bad: 1168 crfree(tndp->ni_cred); 1169 free((caddr_t)sp, M_TEMP); 1170 return (error); 1171 } 1172 1173 /* 1174 * Look up a file name for silly rename stuff. 1175 * Just like nfs_lookup() except that it doesn't load returned values 1176 * into the nfsnode table. 1177 * If fhp != NULL it copies the returned file handle out 1178 */ 1179 nfs_lookitup(vp, ndp, fhp) 1180 register struct vnode *vp; 1181 register struct nameidata *ndp; 1182 nfsv2fh_t *fhp; 1183 { 1184 register u_long *p; 1185 register caddr_t cp; 1186 register long t1, t2; 1187 caddr_t bpos, dpos, cp2; 1188 u_long xid; 1189 int error = 0; 1190 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1191 long len; 1192 1193 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1194 ndp->ni_dvp = vp; 1195 ndp->ni_vp = NULL; 1196 len = ndp->ni_dent.d_namlen; 1197 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1198 nfsm_fhtom(vp); 1199 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1200 nfsm_request(vp); 1201 if (fhp != NULL) { 1202 nfsm_disect(cp, caddr_t, NFSX_FH); 1203 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1204 } 1205 nfsm_reqdone; 1206 return (error); 1207 } 1208 1209 /* 1210 * Kludge City.. 1211 * - make nfs_bmap() essentially a no-op that does no translation 1212 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1213 * after mapping the physical addresses into Kernel Virtual space in the 1214 * nfsiobuf area. 1215 * (Maybe I could use the process's page mapping, but I was concerned that 1216 * Kernel Write might not be enabled and also figured copyout() would do 1217 * a lot more work than bcopy() and also it currently happens in the 1218 * context of the swapper process (2). 1219 */ 1220 nfs_bmap(vp, bn, vpp, bnp) 1221 struct vnode *vp; 1222 daddr_t bn; 1223 struct vnode **vpp; 1224 daddr_t *bnp; 1225 { 1226 if (vpp != NULL) 1227 *vpp = vp; 1228 if (bnp != NULL) 1229 *bnp = bn * btodb(vp->v_mount->m_bsize); 1230 return (0); 1231 } 1232 1233 /* 1234 * Strategy routine for phys. i/o 1235 * If the biod's are running, queue a request 1236 * otherwise just call nfs_doio() to get it done 1237 */ 1238 nfs_strategy(bp) 1239 register struct buf *bp; 1240 { 1241 register struct buf *dp; 1242 register int i; 1243 struct proc *rp; 1244 int error = 0; 1245 int fnd = 0; 1246 1247 /* 1248 * If an i/o daemon is waiting 1249 * queue the request, wake it up and wait for completion 1250 * otherwise just do it ourselves 1251 */ 1252 for (i = 0; i < nfs_asyncdaemons; i++) { 1253 if (rp = nfs_iodwant[i]) { 1254 /* 1255 * Ensure that the async_daemon is still waiting here 1256 */ 1257 if (rp->p_stat != SSLEEP || 1258 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1259 nfs_iodwant[i] = (struct proc *)0; 1260 continue; 1261 } 1262 dp = &nfs_bqueue; 1263 if (dp->b_actf == NULL) { 1264 dp->b_actl = bp; 1265 bp->b_actf = dp; 1266 } else { 1267 dp->b_actf->b_actl = bp; 1268 bp->b_actf = dp->b_actf; 1269 } 1270 dp->b_actf = bp; 1271 bp->b_actl = dp; 1272 fnd++; 1273 nfs_iodwant[i] = (struct proc *)0; 1274 wakeup((caddr_t)&nfs_iodwant[i]); 1275 break; 1276 } 1277 } 1278 if (!fnd) 1279 error = nfs_doio(bp); 1280 return (error); 1281 } 1282 1283 /* 1284 * Fun and games with i/o 1285 * Essentially play ubasetup() and disk interrupt service routine by 1286 * mapping the data buffer into kernel virtual space and doing the 1287 * nfs read or write rpc's from it. 1288 * If the biod's are not running, this is just called from nfs_strategy(), 1289 * otherwise it is called by the biod's to do what would normally be 1290 * partially disk interrupt driven. 1291 */ 1292 nfs_doio(bp) 1293 register struct buf *bp; 1294 { 1295 register struct pte *pte, *ppte; 1296 register caddr_t vaddr; 1297 register struct uio *uiop; 1298 register struct vnode *vp; 1299 struct nfsnode *np; 1300 struct ucred *cr; 1301 int npf, npf2; 1302 int reg; 1303 caddr_t vbase; 1304 caddr_t addr; 1305 unsigned v; 1306 struct proc *rp; 1307 int o, error; 1308 int bcnt; 1309 struct uio uio; 1310 struct iovec io; 1311 1312 vp = bp->b_vp; 1313 uiop = &uio; 1314 uiop->uio_iov = &io; 1315 uiop->uio_iovcnt = 1; 1316 uiop->uio_segflg = UIO_SYSSPACE; 1317 if (bp->b_flags & B_READ) { 1318 io.iov_len = uiop->uio_resid = bp->b_bcount; 1319 uiop->uio_offset = bp->b_blkno*DEV_BSIZE; 1320 addr = bp->b_un.b_addr; 1321 bcnt = bp->b_bcount; 1322 } else { 1323 io.iov_len = uiop->uio_resid = bp->b_dirtyend-bp->b_dirtyoff; 1324 uiop->uio_offset = (bp->b_blkno*DEV_BSIZE)+bp->b_dirtyoff; 1325 addr = bp->b_un.b_addr+bp->b_dirtyoff; 1326 bcnt = bp->b_dirtyend-bp->b_dirtyoff; 1327 } 1328 /* 1329 * For phys i/o, map the b_addr into kernel virtual space using 1330 * the Nfsiomap pte's 1331 * Also, add a temporary b_rcred for reading using the process's uid 1332 * and a guess at a group 1333 */ 1334 if (bp->b_flags & B_PHYS) { 1335 VTONFS(vp)->n_flag |= NPAGEDON; 1336 bp->b_rcred = cr = crget(); 1337 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1338 cr->cr_uid = rp->p_uid; 1339 cr->cr_gid = 0; /* Anything ?? */ 1340 cr->cr_ngroups = 1; 1341 o = (int)addr & PGOFSET; 1342 npf2 = npf = btoc(bcnt + o); 1343 /* 1344 * Get some mapping page table entries 1345 */ 1346 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1347 nfsmap_want++; 1348 sleep((caddr_t)&nfsmap_want, PZERO-1); 1349 } 1350 reg--; 1351 /* I know it is always the else, but that may change someday */ 1352 if ((bp->b_flags & B_PHYS) == 0) 1353 pte = kvtopte(bp->b_un.b_addr); 1354 else if (bp->b_flags & B_PAGET) 1355 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1356 else { 1357 v = btop(bp->b_un.b_addr); 1358 if (bp->b_flags & B_UAREA) 1359 pte = &rp->p_addr[v]; 1360 else 1361 pte = vtopte(rp, v); 1362 } 1363 /* 1364 * Play vmaccess() but with the Nfsiomap page table 1365 */ 1366 ppte = &Nfsiomap[reg]; 1367 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1368 while (npf != 0) { 1369 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1370 #if defined(tahoe) 1371 mtpr(P1DC, vaddr); 1372 #endif 1373 ppte++; 1374 pte++; 1375 vaddr += NBPG; 1376 --npf; 1377 } 1378 io.iov_base = vbase+o; 1379 } else { 1380 io.iov_base = addr; 1381 } 1382 if (bp->b_flags & B_READ) { 1383 uiop->uio_rw = UIO_READ; 1384 bp->b_error = error = nfs_readrpc(vp, uiop, bp->b_rcred); 1385 } else { 1386 uiop->uio_rw = UIO_WRITE; 1387 bp->b_error = error = nfs_writerpc(vp, uiop, bp->b_wcred); 1388 if (error) { 1389 np = VTONFS(vp); 1390 np->n_error = error; 1391 np->n_flag |= NWRITEERR; 1392 } 1393 bp->b_dirtyoff = bp->b_dirtyend = 0; 1394 } 1395 if (error) 1396 bp->b_flags |= B_ERROR; 1397 bp->b_resid = uiop->uio_resid; 1398 /* 1399 * Release pte's used by physical i/o 1400 */ 1401 if (bp->b_flags & B_PHYS) { 1402 crfree(cr); 1403 rmfree(nfsmap, (long)npf2, (long)++reg); 1404 if (nfsmap_want) { 1405 nfsmap_want = 0; 1406 wakeup((caddr_t)&nfsmap_want); 1407 } 1408 } 1409 biodone(bp); 1410 return (error); 1411 } 1412 1413 /* 1414 * Flush all the blocks associated with a vnode. 1415 * Walk through the buffer pool and push any dirty pages 1416 * associated with the vnode. 1417 */ 1418 /* ARGSUSED */ 1419 nfs_fsync(vp, fflags, cred, waitfor) 1420 register struct vnode *vp; 1421 int fflags; 1422 struct ucred *cred; 1423 int waitfor; 1424 { 1425 register struct nfsnode *np = VTONFS(vp); 1426 int error; 1427 1428 if (np->n_flag & NMODIFIED) { 1429 np->n_flag &= ~NMODIFIED; 1430 error = nfs_blkflush(vp, (daddr_t)0, np->n_size, FALSE); 1431 } 1432 return (error); 1433 } 1434