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 7.31 (Berkeley) 03/05/90 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 "param.h" 30 #include "user.h" 31 #include "proc.h" 32 #include "mount.h" 33 #include "buf.h" 34 #include "vm.h" 35 #include "malloc.h" 36 #include "mbuf.h" 37 #include "errno.h" 38 #include "file.h" 39 #include "conf.h" 40 #include "vnode.h" 41 #include "text.h" 42 #include "map.h" 43 #include "nfsv2.h" 44 #include "nfs.h" 45 #include "nfsnode.h" 46 #include "nfsmount.h" 47 #include "xdr_subs.h" 48 #include "nfsm_subs.h" 49 #include "nfsiom.h" 50 51 /* Defs */ 52 #define TRUE 1 53 #define FALSE 0 54 55 /* Global vars */ 56 int nfs_lookup(), 57 nfs_create(), 58 nfs_mknod(), 59 nfs_open(), 60 nfs_close(), 61 nfs_access(), 62 nfs_getattr(), 63 nfs_setattr(), 64 nfs_read(), 65 nfs_write(), 66 vfs_noop(), 67 vfs_nullop(), 68 nfs_remove(), 69 nfs_link(), 70 nfs_rename(), 71 nfs_mkdir(), 72 nfs_rmdir(), 73 nfs_symlink(), 74 nfs_readdir(), 75 nfs_readlink(), 76 nfs_abortop(), 77 nfs_lock(), 78 nfs_unlock(), 79 nfs_bmap(), 80 nfs_strategy(), 81 nfs_fsync(), 82 nfs_inactive(), 83 nfs_reclaim(), 84 nfs_print(), 85 nfs_islocked(); 86 87 struct vnodeops nfsv2_vnodeops = { 88 nfs_lookup, /* lookup */ 89 nfs_create, /* create */ 90 nfs_mknod, /* mknod */ 91 nfs_open, /* open */ 92 nfs_close, /* close */ 93 nfs_access, /* access */ 94 nfs_getattr, /* getattr */ 95 nfs_setattr, /* setattr */ 96 nfs_read, /* read */ 97 nfs_write, /* write */ 98 vfs_noop, /* ioctl */ 99 vfs_noop, /* select */ 100 vfs_noop, /* mmap */ 101 nfs_fsync, /* fsync */ 102 vfs_nullop, /* seek */ 103 nfs_remove, /* remove */ 104 nfs_link, /* link */ 105 nfs_rename, /* rename */ 106 nfs_mkdir, /* mkdir */ 107 nfs_rmdir, /* rmdir */ 108 nfs_symlink, /* symlink */ 109 nfs_readdir, /* readdir */ 110 nfs_readlink, /* readlink */ 111 nfs_abortop, /* abortop */ 112 nfs_inactive, /* inactive */ 113 nfs_reclaim, /* reclaim */ 114 nfs_lock, /* lock */ 115 nfs_unlock, /* unlock */ 116 nfs_bmap, /* bmap */ 117 nfs_strategy, /* strategy */ 118 nfs_print, /* print */ 119 nfs_islocked, /* islocked */ 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_bmap(), 129 spec_ioctl(), 130 spec_select(), 131 spec_close(), 132 spec_badop(), 133 spec_nullop(); 134 135 struct vnodeops spec_nfsv2nodeops = { 136 spec_lookup, /* lookup */ 137 spec_badop, /* create */ 138 spec_badop, /* mknod */ 139 spec_open, /* open */ 140 spec_close, /* close */ 141 nfs_access, /* access */ 142 nfs_getattr, /* getattr */ 143 nfs_setattr, /* setattr */ 144 spec_read, /* read */ 145 spec_write, /* write */ 146 spec_ioctl, /* ioctl */ 147 spec_select, /* select */ 148 spec_badop, /* mmap */ 149 spec_nullop, /* fsync */ 150 spec_badop, /* seek */ 151 spec_badop, /* remove */ 152 spec_badop, /* link */ 153 spec_badop, /* rename */ 154 spec_badop, /* mkdir */ 155 spec_badop, /* rmdir */ 156 spec_badop, /* symlink */ 157 spec_badop, /* readdir */ 158 spec_badop, /* readlink */ 159 spec_badop, /* abortop */ 160 nfs_inactive, /* inactive */ 161 nfs_reclaim, /* reclaim */ 162 nfs_lock, /* lock */ 163 nfs_unlock, /* unlock */ 164 spec_bmap, /* bmap */ 165 spec_strategy, /* strategy */ 166 nfs_print, /* print */ 167 nfs_islocked, /* islocked */ 168 }; 169 170 #ifdef FIFO 171 int fifo_lookup(), 172 fifo_open(), 173 fifo_read(), 174 fifo_write(), 175 fifo_bmap(), 176 fifo_ioctl(), 177 fifo_select(), 178 fifo_close(), 179 fifo_print(), 180 fifo_badop(), 181 fifo_nullop(); 182 183 struct vnodeops fifo_nfsv2nodeops = { 184 fifo_lookup, /* lookup */ 185 fifo_badop, /* create */ 186 fifo_badop, /* mknod */ 187 fifo_open, /* open */ 188 fifo_close, /* close */ 189 nfs_access, /* access */ 190 nfs_getattr, /* getattr */ 191 nfs_setattr, /* setattr */ 192 fifo_read, /* read */ 193 fifo_write, /* write */ 194 fifo_ioctl, /* ioctl */ 195 fifo_select, /* select */ 196 fifo_badop, /* mmap */ 197 fifo_nullop, /* fsync */ 198 fifo_badop, /* seek */ 199 fifo_badop, /* remove */ 200 fifo_badop, /* link */ 201 fifo_badop, /* rename */ 202 fifo_badop, /* mkdir */ 203 fifo_badop, /* rmdir */ 204 fifo_badop, /* symlink */ 205 fifo_badop, /* readdir */ 206 fifo_badop, /* readlink */ 207 fifo_badop, /* abortop */ 208 nfs_inactive, /* inactive */ 209 nfs_reclaim, /* reclaim */ 210 nfs_lock, /* lock */ 211 nfs_unlock, /* unlock */ 212 fifo_bmap, /* bmap */ 213 fifo_badop, /* strategy */ 214 nfs_print, /* print */ 215 nfs_islocked, /* islocked */ 216 }; 217 #endif /* FIFO */ 218 219 extern u_long nfs_procids[NFS_NPROCS]; 220 extern u_long nfs_prog, nfs_vers; 221 extern char nfsiobuf[MAXPHYS+NBPG]; 222 extern int nonidempotent[NFS_NPROCS]; 223 struct map nfsmap[NFS_MSIZ]; 224 enum vtype v_type[NFLNK+1]; 225 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 226 int nfs_asyncdaemons = 0; 227 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 228 static int nfsmap_want = 0; 229 230 /* 231 * nfs null call from vfs. 232 */ 233 nfs_null(vp, cred) 234 struct vnode *vp; 235 struct ucred *cred; 236 { 237 caddr_t bpos, dpos; 238 u_long xid; 239 int error = 0; 240 struct mbuf *mreq, *mrep, *md, *mb; 241 242 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 243 nfsm_request(vp, nonidempotent[NFSPROC_NULL]); 244 nfsm_reqdone; 245 return (error); 246 } 247 248 /* 249 * nfs access vnode op. 250 * Essentially just get vattr and then imitate iaccess() 251 */ 252 nfs_access(vp, mode, cred) 253 struct vnode *vp; 254 int mode; 255 register struct ucred *cred; 256 { 257 register struct vattr *vap; 258 register gid_t *gp; 259 struct vattr vattr; 260 register int i; 261 int error; 262 263 /* 264 * If you're the super-user, 265 * you always get access. 266 */ 267 if (cred->cr_uid == 0) 268 return (0); 269 vap = &vattr; 270 if (error = nfs_getattr(vp, vap, cred)) 271 return (error); 272 /* 273 * Access check is based on only one of owner, group, public. 274 * If not owner, then check group. If not a member of the 275 * group, then check public access. 276 */ 277 if (cred->cr_uid != vap->va_uid) { 278 mode >>= 3; 279 gp = cred->cr_groups; 280 for (i = 0; i < cred->cr_ngroups; i++, gp++) 281 if (vap->va_gid == *gp) 282 goto found; 283 mode >>= 3; 284 found: 285 ; 286 } 287 if ((vap->va_mode & mode) != 0) 288 return (0); 289 return (EACCES); 290 } 291 292 /* 293 * nfs open vnode op 294 * Just check to see if the type is ok 295 */ 296 /* ARGSUSED */ 297 nfs_open(vp, mode, cred) 298 struct vnode *vp; 299 int mode; 300 struct ucred *cred; 301 { 302 register enum vtype vtyp; 303 304 vtyp = vp->v_type; 305 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 306 return (0); 307 else 308 return (EACCES); 309 } 310 311 /* 312 * nfs close vnode op 313 * For reg files, invalidate any buffer cache entries. 314 */ 315 /* ARGSUSED */ 316 nfs_close(vp, fflags, cred) 317 register struct vnode *vp; 318 int fflags; 319 struct ucred *cred; 320 { 321 register struct nfsnode *np = VTONFS(vp); 322 int error = 0; 323 324 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 325 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 326 nfs_lock(vp); 327 np->n_flag &= ~(NMODIFIED|NBUFFERED); 328 vinvalbuf(vp, TRUE); 329 if (np->n_flag & NWRITEERR) { 330 np->n_flag &= ~NWRITEERR; 331 error = np->n_error; 332 } 333 nfs_unlock(vp); 334 } 335 return (error); 336 } 337 338 /* 339 * nfs getattr call from vfs. 340 */ 341 nfs_getattr(vp, vap, cred) 342 register struct vnode *vp; 343 struct vattr *vap; 344 struct ucred *cred; 345 { 346 register caddr_t cp; 347 register long t1; 348 caddr_t bpos, dpos; 349 u_long xid; 350 int error = 0; 351 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 352 353 /* First look in the cache.. */ 354 if (nfs_getattrcache(vp, vap) == 0) 355 return (0); 356 nfsstats.rpccnt[NFSPROC_GETATTR]++; 357 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 358 nfsm_fhtom(vp); 359 nfsm_request(vp, nonidempotent[NFSPROC_GETATTR]); 360 nfsm_loadattr(vp, vap); 361 nfsm_reqdone; 362 return (error); 363 } 364 365 /* 366 * nfs setattr call. 367 */ 368 nfs_setattr(vp, vap, cred) 369 register struct vnode *vp; 370 register struct vattr *vap; 371 struct ucred *cred; 372 { 373 register struct nfsv2_sattr *sp; 374 register caddr_t cp; 375 register long t1; 376 caddr_t bpos, dpos; 377 u_long xid; 378 int error = 0; 379 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 380 struct nfsnode *np; 381 382 nfsstats.rpccnt[NFSPROC_SETATTR]++; 383 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 384 nfsm_fhtom(vp); 385 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 386 if (vap->va_mode == 0xffff) 387 sp->sa_mode = VNOVAL; 388 else 389 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 390 if (vap->va_uid == 0xffff) 391 sp->sa_uid = VNOVAL; 392 else 393 sp->sa_uid = txdr_unsigned(vap->va_uid); 394 if (vap->va_gid == 0xffff) 395 sp->sa_gid = VNOVAL; 396 else 397 sp->sa_gid = txdr_unsigned(vap->va_gid); 398 sp->sa_size = txdr_unsigned(vap->va_size); 399 if (vap->va_size != VNOVAL) { 400 np = VTONFS(vp); 401 if (np->n_flag & NMODIFIED) { 402 np->n_flag &= ~NMODIFIED; 403 vinvalbuf(vp, TRUE); 404 } 405 } 406 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 407 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 408 txdr_time(&vap->va_mtime, &sp->sa_mtime); 409 nfsm_request(vp, nonidempotent[NFSPROC_SETATTR]); 410 nfsm_loadattr(vp, (struct vattr *)0); 411 /* should we fill in any vap fields ?? */ 412 nfsm_reqdone; 413 return (error); 414 } 415 416 /* 417 * nfs lookup call, one step at a time... 418 * First look in cache 419 * If not found, unlock the directory nfsnode and do the rpc 420 */ 421 nfs_lookup(vp, ndp) 422 register struct vnode *vp; 423 register struct nameidata *ndp; 424 { 425 register struct vnode *vdp; 426 register u_long *p; 427 register caddr_t cp; 428 register long t1, t2; 429 caddr_t bpos, dpos, cp2; 430 u_long xid; 431 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 432 struct vnode *newvp; 433 long len; 434 nfsv2fh_t *fhp; 435 struct nfsnode *np; 436 int lockparent, wantparent, flag, error = 0; 437 438 ndp->ni_dvp = vp; 439 ndp->ni_vp = NULL; 440 if (vp->v_type != VDIR) 441 return (ENOTDIR); 442 lockparent = ndp->ni_nameiop & LOCKPARENT; 443 flag = ndp->ni_nameiop & OPFLAG; 444 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 445 if ((error = cache_lookup(ndp)) && error != ENOENT) { 446 struct vattr vattr; 447 int vpid; 448 449 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 450 panic("nfs_lookup: .. through root"); 451 vdp = ndp->ni_vp; 452 vpid = vdp->v_id; 453 /* 454 * See the comment starting `Step through' in ufs/ufs_lookup.c 455 * for an explanation of the locking protocol 456 */ 457 if (vp == vdp) { 458 VREF(vdp); 459 error = 0; 460 } else if (ndp->ni_isdotdot) { 461 nfs_unlock(vp); 462 error = vget(vdp); 463 } else { 464 error = vget(vdp); 465 nfs_unlock(vp); 466 } 467 if (!error) { 468 if (vpid == vdp->v_id) { 469 if (!nfs_getattr(vdp, &vattr, ndp->ni_cred) && 470 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 471 nfsstats.lookupcache_hits++; 472 return (0); 473 } else { 474 cache_purge(vdp); 475 nfs_nput(vdp); 476 } 477 } else { 478 nfs_nput(vdp); 479 } 480 } 481 ndp->ni_vp = (struct vnode *)0; 482 } else 483 nfs_unlock(vp); 484 error = 0; 485 nfsstats.lookupcache_misses++; 486 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 487 len = ndp->ni_namelen; 488 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 489 nfsm_fhtom(vp); 490 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 491 nfsm_request(vp, nonidempotent[NFSPROC_LOOKUP]); 492 nfsmout: 493 if (error) { 494 if (lockparent || (flag != CREATE && flag != RENAME) || 495 *ndp->ni_next != 0) 496 nfs_lock(vp); 497 return (ENOENT); 498 } 499 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 500 501 /* 502 * Handle DELETE and RENAME cases... 503 */ 504 if (flag == DELETE && *ndp->ni_next == 0) { 505 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 506 VREF(vp); 507 newvp = vp; 508 np = VTONFS(vp); 509 } else { 510 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 511 nfs_lock(vp); 512 m_freem(mrep); 513 return (error); 514 } 515 newvp = NFSTOV(np); 516 } 517 if (error = 518 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 519 nfs_lock(vp); 520 if (newvp != vp) 521 nfs_nput(newvp); 522 else 523 vrele(vp); 524 m_freem(mrep); 525 return (error); 526 } 527 ndp->ni_vp = newvp; 528 if (lockparent || vp == newvp) 529 nfs_lock(vp); 530 m_freem(mrep); 531 return (0); 532 } 533 534 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 535 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 536 nfs_lock(vp); 537 m_freem(mrep); 538 return (EISDIR); 539 } 540 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 541 nfs_lock(vp); 542 m_freem(mrep); 543 return (error); 544 } 545 newvp = NFSTOV(np); 546 if (error = 547 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 548 nfs_lock(vp); 549 nfs_nput(newvp); 550 m_freem(mrep); 551 return (error); 552 } 553 ndp->ni_vp = newvp; 554 if (lockparent) 555 nfs_lock(vp); 556 return (0); 557 } 558 559 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 560 VREF(vp); 561 newvp = vp; 562 np = VTONFS(vp); 563 } else if (ndp->ni_isdotdot) { 564 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 565 nfs_lock(vp); 566 m_freem(mrep); 567 return (error); 568 } 569 newvp = NFSTOV(np); 570 } else { 571 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 572 nfs_lock(vp); 573 m_freem(mrep); 574 return (error); 575 } 576 newvp = NFSTOV(np); 577 } 578 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 579 nfs_lock(vp); 580 if (newvp != vp) 581 nfs_nput(newvp); 582 else 583 vrele(vp); 584 m_freem(mrep); 585 return (error); 586 } 587 m_freem(mrep); 588 589 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 590 nfs_lock(vp); 591 ndp->ni_vp = newvp; 592 if (error == 0 && ndp->ni_makeentry) { 593 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 594 cache_enter(ndp); 595 } 596 return (error); 597 } 598 599 /* 600 * nfs readlink call 601 */ 602 nfs_readlink(vp, uiop, cred) 603 register struct vnode *vp; 604 struct uio *uiop; 605 struct ucred *cred; 606 { 607 register u_long *p; 608 register caddr_t cp; 609 register long t1; 610 caddr_t bpos, dpos, cp2; 611 u_long xid; 612 int error = 0; 613 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 614 long len; 615 616 nfsstats.rpccnt[NFSPROC_READLINK]++; 617 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 618 nfsm_fhtom(vp); 619 nfsm_request(vp, nonidempotent[NFSPROC_READLINK]); 620 nfsm_strsiz(len, NFS_MAXPATHLEN); 621 nfsm_mtouio(uiop, len); 622 nfsm_reqdone; 623 return (error); 624 } 625 626 /* 627 * nfs read call 628 */ 629 nfs_readrpc(vp, uiop, cred) 630 register struct vnode *vp; 631 struct uio *uiop; 632 struct ucred *cred; 633 { 634 register u_long *p; 635 register caddr_t cp; 636 register long t1; 637 caddr_t bpos, dpos, cp2; 638 u_long xid; 639 int error = 0; 640 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 641 struct nfsmount *nmp; 642 long len, retlen, tsiz; 643 644 nmp = vfs_to_nfs(vp->v_mount); 645 tsiz = uiop->uio_resid; 646 while (tsiz > 0) { 647 nfsstats.rpccnt[NFSPROC_READ]++; 648 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 649 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 650 nfsm_fhtom(vp); 651 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 652 *p++ = txdr_unsigned(uiop->uio_offset); 653 *p++ = txdr_unsigned(len); 654 *p = 0; 655 nfsm_request(vp, nonidempotent[NFSPROC_READ]); 656 nfsm_loadattr(vp, (struct vattr *)0); 657 nfsm_strsiz(retlen, nmp->nm_rsize); 658 nfsm_mtouio(uiop, retlen); 659 m_freem(mrep); 660 if (retlen < len) 661 tsiz = 0; 662 else 663 tsiz -= len; 664 } 665 nfsmout: 666 return (error); 667 } 668 669 /* 670 * nfs write call 671 */ 672 nfs_writerpc(vp, uiop, cred) 673 register struct vnode *vp; 674 struct uio *uiop; 675 struct ucred *cred; 676 { 677 register u_long *p; 678 register caddr_t cp; 679 register long t1; 680 caddr_t bpos, dpos; 681 u_long xid; 682 int error = 0; 683 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 684 struct nfsmount *nmp; 685 long len, tsiz; 686 687 nmp = vfs_to_nfs(vp->v_mount); 688 tsiz = uiop->uio_resid; 689 while (tsiz > 0) { 690 nfsstats.rpccnt[NFSPROC_WRITE]++; 691 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 692 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 693 NFSX_FH+NFSX_UNSIGNED*4); 694 nfsm_fhtom(vp); 695 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 696 *(p+1) = txdr_unsigned(uiop->uio_offset); 697 *(p+3) = txdr_unsigned(len); 698 nfsm_uiotom(uiop, len); 699 nfsm_request(vp, nonidempotent[NFSPROC_WRITE]); 700 nfsm_loadattr(vp, (struct vattr *)0); 701 m_freem(mrep); 702 tsiz -= len; 703 } 704 nfsmout: 705 return (error); 706 } 707 708 /* 709 * nfs mknod call 710 * This call is currently not supported. 711 */ 712 /* ARGSUSED */ 713 nfs_mknod(ndp, vap, cred) 714 struct nameidata *ndp; 715 struct ucred *cred; 716 struct vattr *vap; 717 { 718 719 nfs_abortop(ndp); 720 return (EOPNOTSUPP); 721 } 722 723 /* 724 * nfs file create call 725 */ 726 nfs_create(ndp, vap) 727 register struct nameidata *ndp; 728 register struct vattr *vap; 729 { 730 register struct nfsv2_sattr *sp; 731 register u_long *p; 732 register caddr_t cp; 733 register long t1, t2; 734 caddr_t bpos, dpos, cp2; 735 u_long xid; 736 int error = 0; 737 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 738 739 nfsstats.rpccnt[NFSPROC_CREATE]++; 740 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 741 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 742 nfsm_fhtom(ndp->ni_dvp); 743 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 744 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 745 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 746 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 747 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 748 sp->sa_size = txdr_unsigned(0); 749 /* or should these be VNOVAL ?? */ 750 txdr_time(&vap->va_atime, &sp->sa_atime); 751 txdr_time(&vap->va_mtime, &sp->sa_mtime); 752 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_CREATE]); 753 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 754 nfsm_reqdone; 755 nfs_nput(ndp->ni_dvp); 756 return (error); 757 } 758 759 /* 760 * nfs file remove call 761 * To try and make nfs semantics closer to vfs semantics, a file that has 762 * other references to the vnode is renamed instead of removed and then 763 * removed later on the last close. 764 * Unfortunately you must flush the buffer cache and cmap to get rid of 765 * all extraneous vnode references before you check the reference cnt. 766 * 1 - If the file could have blocks in the buffer cache 767 * flush them out and invalidate them 768 * mpurge the vnode to flush out cmap references 769 * (This is necessary to update the vnode ref cnt as well as sensible 770 * for actual removes, to free up the buffers) 771 * 2 - If v_usecount > 1 772 * If a rename is not already in the works 773 * call nfs_sillyrename() to set it up 774 * else 775 * do the remove rpc 776 */ 777 nfs_remove(ndp) 778 register struct nameidata *ndp; 779 { 780 register struct vnode *vp = ndp->ni_vp; 781 register struct nfsnode *np = VTONFS(ndp->ni_vp); 782 register u_long *p; 783 register caddr_t cp; 784 register long t1, t2; 785 caddr_t bpos, dpos; 786 u_long xid; 787 int error = 0; 788 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 789 790 if (vp->v_type == VREG) { 791 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 792 np->n_flag &= ~(NMODIFIED|NBUFFERED); 793 vinvalbuf(vp, TRUE); 794 } 795 if (np->n_flag & NPAGEDON) { 796 np->n_flag &= ~NPAGEDON; 797 mpurge(vp); /* In case cmap entries still ref it */ 798 } 799 } 800 if (vp->v_usecount > 1) { 801 if (!np->n_sillyrename) 802 error = nfs_sillyrename(ndp, REMOVE); 803 } else { 804 nfsstats.rpccnt[NFSPROC_REMOVE]++; 805 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 806 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 807 nfsm_fhtom(ndp->ni_dvp); 808 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 809 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_REMOVE]); 810 nfsm_reqdone; 811 /* 812 * Kludge City: If the first reply to the remove rpc is lost.. 813 * the reply to the retransmitted request will be ENOENT 814 * since the file was in fact removed 815 * Therefore, we cheat and return success. 816 */ 817 if (error == ENOENT) 818 error = 0; 819 } 820 np->n_attrstamp = 0; 821 if (ndp->ni_dvp == vp) 822 vrele(vp); 823 else 824 nfs_nput(ndp->ni_dvp); 825 nfs_nput(vp); 826 return (error); 827 } 828 829 /* 830 * nfs file remove rpc called from nfs_inactive 831 */ 832 nfs_removeit(ndp) 833 register struct nameidata *ndp; 834 { 835 register u_long *p; 836 register caddr_t cp; 837 register long t1, t2; 838 caddr_t bpos, dpos; 839 u_long xid; 840 int error = 0; 841 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 842 843 nfsstats.rpccnt[NFSPROC_REMOVE]++; 844 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 845 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 846 nfsm_fhtom(ndp->ni_dvp); 847 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 848 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_REMOVE]); 849 nfsm_reqdone; 850 return (error); 851 } 852 853 /* 854 * nfs file rename call 855 */ 856 nfs_rename(sndp, tndp) 857 register struct nameidata *sndp, *tndp; 858 { 859 register u_long *p; 860 register caddr_t cp; 861 register long t1, t2; 862 caddr_t bpos, dpos; 863 u_long xid; 864 int error = 0; 865 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 866 867 nfsstats.rpccnt[NFSPROC_RENAME]++; 868 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 869 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 870 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 871 nfsm_fhtom(sndp->ni_dvp); 872 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 873 nfsm_fhtom(tndp->ni_dvp); 874 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 875 nfsm_request(sndp->ni_dvp, nonidempotent[NFSPROC_RENAME]); 876 nfsm_reqdone; 877 if (sndp->ni_vp->v_type == VDIR) { 878 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 879 cache_purge(tndp->ni_dvp); 880 cache_purge(sndp->ni_dvp); 881 } 882 nfs_abortop(sndp); 883 nfs_abortop(tndp); 884 /* 885 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 886 */ 887 if (error == ENOENT) 888 error = 0; 889 return (error); 890 } 891 892 /* 893 * nfs file rename rpc called from above 894 */ 895 nfs_renameit(sndp, tndp) 896 register struct nameidata *sndp, *tndp; 897 { 898 register u_long *p; 899 register caddr_t cp; 900 register long t1, t2; 901 caddr_t bpos, dpos; 902 u_long xid; 903 int error = 0; 904 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 905 906 nfsstats.rpccnt[NFSPROC_RENAME]++; 907 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 908 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 909 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 910 nfsm_fhtom(sndp->ni_dvp); 911 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 912 nfsm_fhtom(tndp->ni_dvp); 913 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 914 nfsm_request(sndp->ni_dvp, nonidempotent[NFSPROC_RENAME]); 915 nfsm_reqdone; 916 return (error); 917 } 918 919 /* 920 * nfs hard link create call 921 */ 922 nfs_link(vp, ndp) 923 register struct vnode *vp; 924 register struct nameidata *ndp; 925 { 926 register u_long *p; 927 register caddr_t cp; 928 register long t1, t2; 929 caddr_t bpos, dpos; 930 u_long xid; 931 int error = 0; 932 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 933 934 if (ndp->ni_dvp != vp) 935 nfs_lock(vp); 936 nfsstats.rpccnt[NFSPROC_LINK]++; 937 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 938 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 939 nfsm_fhtom(vp); 940 nfsm_fhtom(ndp->ni_dvp); 941 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 942 nfsm_request(vp, nonidempotent[NFSPROC_LINK]); 943 nfsm_reqdone; 944 VTONFS(vp)->n_attrstamp = 0; 945 if (ndp->ni_dvp != vp) 946 nfs_unlock(vp); 947 nfs_nput(ndp->ni_dvp); 948 /* 949 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 950 */ 951 if (error == EEXIST) 952 error = 0; 953 return (error); 954 } 955 956 /* 957 * nfs symbolic link create call 958 */ 959 nfs_symlink(ndp, vap, nm) 960 struct nameidata *ndp; 961 struct vattr *vap; 962 char *nm; /* is this the path ?? */ 963 { 964 register struct nfsv2_sattr *sp; 965 register u_long *p; 966 register caddr_t cp; 967 register long t1, t2; 968 caddr_t bpos, dpos; 969 u_long xid; 970 int error = 0; 971 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 972 973 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 974 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 975 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 976 nfsm_fhtom(ndp->ni_dvp); 977 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 978 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 979 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 980 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 981 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 982 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 983 sp->sa_size = txdr_unsigned(VNOVAL); 984 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 985 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 986 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_SYMLINK]); 987 nfsm_reqdone; 988 nfs_nput(ndp->ni_dvp); 989 /* 990 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 991 */ 992 if (error == EEXIST) 993 error = 0; 994 return (error); 995 } 996 997 /* 998 * nfs make dir call 999 */ 1000 nfs_mkdir(ndp, vap) 1001 register struct nameidata *ndp; 1002 struct vattr *vap; 1003 { 1004 register struct nfsv2_sattr *sp; 1005 register u_long *p; 1006 register caddr_t cp; 1007 register long t1, t2; 1008 caddr_t bpos, dpos, cp2; 1009 u_long xid; 1010 int error = 0; 1011 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1012 1013 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1014 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1015 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 1016 nfsm_fhtom(ndp->ni_dvp); 1017 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1018 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1019 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1020 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1021 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1022 sp->sa_size = txdr_unsigned(VNOVAL); 1023 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1024 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1025 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_MKDIR]); 1026 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1027 nfsm_reqdone; 1028 nfs_nput(ndp->ni_dvp); 1029 /* 1030 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry. 1031 */ 1032 if (error == EEXIST) 1033 error = 0; 1034 return (error); 1035 } 1036 1037 /* 1038 * nfs remove directory call 1039 */ 1040 nfs_rmdir(ndp) 1041 register struct nameidata *ndp; 1042 { 1043 register u_long *p; 1044 register caddr_t cp; 1045 register long t1, t2; 1046 caddr_t bpos, dpos; 1047 u_long xid; 1048 int error = 0; 1049 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1050 1051 if (ndp->ni_dvp == ndp->ni_vp) { 1052 vrele(ndp->ni_dvp); 1053 nfs_nput(ndp->ni_dvp); 1054 return (EINVAL); 1055 } 1056 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1057 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1058 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1059 nfsm_fhtom(ndp->ni_dvp); 1060 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1061 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_RMDIR]); 1062 nfsm_reqdone; 1063 cache_purge(ndp->ni_dvp); 1064 cache_purge(ndp->ni_vp); 1065 nfs_nput(ndp->ni_vp); 1066 nfs_nput(ndp->ni_dvp); 1067 /* 1068 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1069 */ 1070 if (error == ENOENT) 1071 error = 0; 1072 return (error); 1073 } 1074 1075 /* 1076 * nfs readdir call 1077 * Although cookie is defined as opaque, I translate it to/from net byte 1078 * order so that it looks more sensible. This appears consistent with the 1079 * Ultrix implementation of NFS. 1080 */ 1081 nfs_readdir(vp, uiop, cred) 1082 register struct vnode *vp; 1083 struct uio *uiop; 1084 struct ucred *cred; 1085 { 1086 register long len; 1087 register struct direct *dp; 1088 register u_long *p; 1089 register caddr_t cp; 1090 register long t1; 1091 long tlen; 1092 caddr_t bpos, dpos, cp2; 1093 u_long xid; 1094 int error = 0; 1095 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1096 struct mbuf *md2; 1097 caddr_t dpos2; 1098 int siz; 1099 int more_dirs; 1100 off_t off, savoff; 1101 struct direct *savdp; 1102 1103 nfsstats.rpccnt[NFSPROC_READDIR]++; 1104 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1105 nfsm_fhtom(vp); 1106 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1107 *p++ = txdr_unsigned(uiop->uio_offset); 1108 *p = txdr_unsigned(uiop->uio_resid); 1109 nfsm_request(vp, nonidempotent[NFSPROC_READDIR]); 1110 siz = 0; 1111 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1112 more_dirs = fxdr_unsigned(int, *p); 1113 1114 /* Save the position so that we can do nfsm_mtouio() later */ 1115 dpos2 = dpos; 1116 md2 = md; 1117 1118 /* loop thru the dir entries, doctoring them to 4bsd form */ 1119 savoff = off = 0; 1120 savdp = dp = NULL; 1121 while (more_dirs && siz < uiop->uio_resid) { 1122 savoff = off; /* Hold onto offset and dp */ 1123 savdp = dp; 1124 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1125 dp = (struct direct *)p; 1126 dp->d_ino = fxdr_unsigned(u_long, *p++); 1127 len = fxdr_unsigned(int, *p); 1128 if (len <= 0 || len > NFS_MAXNAMLEN) { 1129 error = EBADRPC; 1130 m_freem(mrep); 1131 goto nfsmout; 1132 } 1133 dp->d_namlen = (u_short)len; 1134 nfsm_adv(len); /* Point past name */ 1135 tlen = nfsm_rndup(len); 1136 if (tlen != len) { /* If name not on rounded boundary */ 1137 *dpos = '\0'; /* Null-terminate */ 1138 nfsm_adv(tlen - len); 1139 len = tlen; 1140 } 1141 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1142 off = fxdr_unsigned(off_t, *p); 1143 *p++ = 0; /* Ensures null termination of name */ 1144 more_dirs = fxdr_unsigned(int, *p); 1145 dp->d_reclen = len+4*NFSX_UNSIGNED; 1146 siz += dp->d_reclen; 1147 } 1148 /* 1149 * If at end of rpc data, get the eof boolean 1150 */ 1151 if (!more_dirs) 1152 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1153 /* 1154 * If there is too much to fit in the data buffer, use savoff and 1155 * savdp to trim off the last record. 1156 * --> we are not at eof 1157 */ 1158 if (siz > uiop->uio_resid) { 1159 off = savoff; 1160 siz -= dp->d_reclen; 1161 dp = savdp; 1162 } 1163 if (siz > 0) { 1164 md = md2; 1165 dpos = dpos2; 1166 nfsm_mtouio(uiop, siz); 1167 uiop->uio_offset = off; 1168 } 1169 nfsm_reqdone; 1170 return (error); 1171 } 1172 1173 /* 1174 * nfs statfs call 1175 * (Actually a vfsop, not a vnode op) 1176 */ 1177 nfs_statfs(mp, sbp) 1178 struct mount *mp; 1179 register struct statfs *sbp; 1180 { 1181 register struct vnode *vp; 1182 register struct nfsv2_statfs *sfp; 1183 register caddr_t cp; 1184 register long t1; 1185 caddr_t bpos, dpos, cp2; 1186 u_long xid; 1187 int error = 0; 1188 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1189 struct nfsmount *nmp; 1190 struct ucred *cred; 1191 struct nfsnode *np; 1192 1193 nmp = vfs_to_nfs(mp); 1194 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 1195 return (error); 1196 vp = NFSTOV(np); 1197 nfsstats.rpccnt[NFSPROC_STATFS]++; 1198 cred = crget(); 1199 cred->cr_ngroups = 1; 1200 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1201 nfsm_fhtom(vp); 1202 nfsm_request(vp, nonidempotent[NFSPROC_STATFS]); 1203 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1204 sbp->f_type = MOUNT_NFS; 1205 sbp->f_flags = nmp->nm_flag; 1206 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1207 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1208 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1209 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1210 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1211 sbp->f_files = 0; 1212 sbp->f_ffree = 0; 1213 sbp->f_fsid.val[0] = mp->m_fsid.val[0]; 1214 sbp->f_fsid.val[1] = mp->m_fsid.val[1]; 1215 bcopy(nmp->nm_path, sbp->f_mntonname, MNAMELEN); 1216 bcopy(nmp->nm_host, sbp->f_mntfromname, MNAMELEN); 1217 nfsm_reqdone; 1218 nfs_nput(vp); 1219 crfree(cred); 1220 return (error); 1221 } 1222 1223 static char hextoasc[] = "0123456789abcdef"; 1224 1225 /* 1226 * Silly rename. To make the NFS filesystem that is stateless look a little 1227 * more like the "ufs" a remove of an active vnode is translated to a rename 1228 * to a funny looking filename that is removed by nfs_inactive on the 1229 * nfsnode. There is the potential for another process on a different client 1230 * to create the same funny name between the nfs_lookitup() fails and the 1231 * nfs_rename() completes, but... 1232 */ 1233 nfs_sillyrename(ndp, flag) 1234 register struct nameidata *ndp; 1235 int flag; 1236 { 1237 register struct nfsnode *np; 1238 register struct sillyrename *sp; 1239 register struct nameidata *tndp; 1240 int error; 1241 short pid; 1242 1243 np = VTONFS(ndp->ni_dvp); 1244 cache_purge(ndp->ni_dvp); 1245 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1246 M_TEMP, M_WAITOK); 1247 sp->s_flag = flag; 1248 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1249 np = VTONFS(ndp->ni_vp); 1250 tndp = &sp->s_namei; 1251 tndp->ni_cred = crdup(ndp->ni_cred); 1252 1253 /* Fudge together a funny name */ 1254 pid = u.u_procp->p_pid; 1255 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1256 tndp->ni_dent.d_namlen = 12; 1257 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1258 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1259 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1260 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1261 1262 /* Try lookitups until we get one that isn't there */ 1263 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1264 tndp->ni_dent.d_name[4]++; 1265 if (tndp->ni_dent.d_name[4] > 'z') { 1266 error = EINVAL; 1267 goto bad; 1268 } 1269 } 1270 if (error = nfs_renameit(ndp, tndp)) 1271 goto bad; 1272 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1273 np->n_sillyrename = sp; 1274 return (0); 1275 bad: 1276 crfree(tndp->ni_cred); 1277 free((caddr_t)sp, M_TEMP); 1278 return (error); 1279 } 1280 1281 /* 1282 * Look up a file name for silly rename stuff. 1283 * Just like nfs_lookup() except that it doesn't load returned values 1284 * into the nfsnode table. 1285 * If fhp != NULL it copies the returned file handle out 1286 */ 1287 nfs_lookitup(vp, ndp, fhp) 1288 register struct vnode *vp; 1289 register struct nameidata *ndp; 1290 nfsv2fh_t *fhp; 1291 { 1292 register u_long *p; 1293 register caddr_t cp; 1294 register long t1, t2; 1295 caddr_t bpos, dpos, cp2; 1296 u_long xid; 1297 int error = 0; 1298 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1299 long len; 1300 1301 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1302 ndp->ni_dvp = vp; 1303 ndp->ni_vp = NULL; 1304 len = ndp->ni_dent.d_namlen; 1305 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1306 nfsm_fhtom(vp); 1307 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1308 nfsm_request(vp, nonidempotent[NFSPROC_LOOKUP]); 1309 if (fhp != NULL) { 1310 nfsm_disect(cp, caddr_t, NFSX_FH); 1311 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1312 } 1313 nfsm_reqdone; 1314 return (error); 1315 } 1316 1317 /* 1318 * Kludge City.. 1319 * - make nfs_bmap() essentially a no-op that does no translation 1320 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1321 * after mapping the physical addresses into Kernel Virtual space in the 1322 * nfsiobuf area. 1323 * (Maybe I could use the process's page mapping, but I was concerned that 1324 * Kernel Write might not be enabled and also figured copyout() would do 1325 * a lot more work than bcopy() and also it currently happens in the 1326 * context of the swapper process (2). 1327 */ 1328 nfs_bmap(vp, bn, vpp, bnp) 1329 struct vnode *vp; 1330 daddr_t bn; 1331 struct vnode **vpp; 1332 daddr_t *bnp; 1333 { 1334 if (vpp != NULL) 1335 *vpp = vp; 1336 if (bnp != NULL) 1337 *bnp = bn * btodb(vp->v_mount->m_bsize); 1338 return (0); 1339 } 1340 1341 /* 1342 * Strategy routine for phys. i/o 1343 * If the biod's are running, queue a request 1344 * otherwise just call nfs_doio() to get it done 1345 */ 1346 nfs_strategy(bp) 1347 register struct buf *bp; 1348 { 1349 register struct buf *dp; 1350 register int i; 1351 struct proc *rp; 1352 int error = 0; 1353 int fnd = 0; 1354 1355 /* 1356 * If an i/o daemon is waiting 1357 * queue the request, wake it up and wait for completion 1358 * otherwise just do it ourselves 1359 */ 1360 for (i = 0; i < nfs_asyncdaemons; i++) { 1361 if (rp = nfs_iodwant[i]) { 1362 /* 1363 * Ensure that the async_daemon is still waiting here 1364 */ 1365 if (rp->p_stat != SSLEEP || 1366 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1367 nfs_iodwant[i] = (struct proc *)0; 1368 continue; 1369 } 1370 dp = &nfs_bqueue; 1371 if (dp->b_actf == NULL) { 1372 dp->b_actl = bp; 1373 bp->b_actf = dp; 1374 } else { 1375 dp->b_actf->b_actl = bp; 1376 bp->b_actf = dp->b_actf; 1377 } 1378 dp->b_actf = bp; 1379 bp->b_actl = dp; 1380 fnd++; 1381 nfs_iodwant[i] = (struct proc *)0; 1382 wakeup((caddr_t)&nfs_iodwant[i]); 1383 break; 1384 } 1385 } 1386 if (!fnd) 1387 error = nfs_doio(bp); 1388 return (error); 1389 } 1390 1391 /* 1392 * Fun and games with i/o 1393 * Essentially play ubasetup() and disk interrupt service routine by 1394 * mapping the data buffer into kernel virtual space and doing the 1395 * nfs read or write rpc's from it. 1396 * If the biod's are not running, this is just called from nfs_strategy(), 1397 * otherwise it is called by the biod's to do what would normally be 1398 * partially disk interrupt driven. 1399 */ 1400 nfs_doio(bp) 1401 register struct buf *bp; 1402 { 1403 register struct pte *pte, *ppte; 1404 register caddr_t vaddr; 1405 register struct uio *uiop; 1406 register struct vnode *vp; 1407 struct nfsnode *np; 1408 struct ucred *cr; 1409 int npf, npf2; 1410 int reg; 1411 caddr_t vbase; 1412 unsigned v; 1413 struct proc *rp; 1414 int o, error; 1415 struct uio uio; 1416 struct iovec io; 1417 1418 vp = bp->b_vp; 1419 np = VTONFS(vp); 1420 uiop = &uio; 1421 uiop->uio_iov = &io; 1422 uiop->uio_iovcnt = 1; 1423 uiop->uio_segflg = UIO_SYSSPACE; 1424 1425 /* 1426 * For phys i/o, map the b_addr into kernel virtual space using 1427 * the Nfsiomap pte's 1428 * Also, add a temporary b_rcred for reading using the process's uid 1429 * and a guess at a group 1430 */ 1431 if (bp->b_flags & B_PHYS) { 1432 np->n_flag |= NPAGEDON; 1433 bp->b_rcred = cr = crget(); 1434 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1435 cr->cr_uid = rp->p_uid; 1436 cr->cr_gid = 0; /* Anything ?? */ 1437 cr->cr_ngroups = 1; 1438 o = (int)bp->b_un.b_addr & PGOFSET; 1439 npf2 = npf = btoc(bp->b_bcount + o); 1440 1441 /* 1442 * Get some mapping page table entries 1443 */ 1444 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1445 nfsmap_want++; 1446 sleep((caddr_t)&nfsmap_want, PZERO-1); 1447 } 1448 reg--; 1449 if (bp->b_flags & B_PAGET) 1450 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1451 else { 1452 v = btop(bp->b_un.b_addr); 1453 if (bp->b_flags & B_UAREA) 1454 pte = &rp->p_addr[v]; 1455 else 1456 pte = vtopte(rp, v); 1457 } 1458 1459 /* 1460 * Play vmaccess() but with the Nfsiomap page table 1461 */ 1462 ppte = &Nfsiomap[reg]; 1463 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1464 while (npf != 0) { 1465 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1466 #if defined(tahoe) 1467 mtpr(P1DC, vaddr); 1468 #endif 1469 ppte++; 1470 pte++; 1471 vaddr += NBPG; 1472 --npf; 1473 } 1474 1475 /* 1476 * And do the i/o rpc 1477 */ 1478 io.iov_base = vbase+o; 1479 io.iov_len = uiop->uio_resid = bp->b_bcount; 1480 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1481 if (bp->b_flags & B_READ) { 1482 uiop->uio_rw = UIO_READ; 1483 nfsstats.read_physios++; 1484 bp->b_error = error = nfs_readrpc(vp, uiop, bp->b_rcred); 1485 /* 1486 * If a text file has been modified since it was exec'd 1487 * blow the process' out of the water. This is the 1488 * closest we can come to "Text File Busy" in good old 1489 * stateless nfs. 1490 */ 1491 if ((vp->v_flag & VTEXT) && 1492 (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec)) 1493 xinval(vp); 1494 } else { 1495 uiop->uio_rw = UIO_WRITE; 1496 nfsstats.write_physios++; 1497 bp->b_error = error = nfs_writerpc(vp, uiop, bp->b_wcred); 1498 } 1499 1500 /* 1501 * Finally, release pte's used by physical i/o 1502 */ 1503 crfree(cr); 1504 rmfree(nfsmap, (long)npf2, (long)++reg); 1505 if (nfsmap_want) { 1506 nfsmap_want = 0; 1507 wakeup((caddr_t)&nfsmap_want); 1508 } 1509 } else { 1510 if (bp->b_flags & B_READ) { 1511 io.iov_len = uiop->uio_resid = bp->b_bcount; 1512 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1513 io.iov_base = bp->b_un.b_addr; 1514 uiop->uio_rw = UIO_READ; 1515 nfsstats.read_bios++; 1516 bp->b_error = error = nfs_readrpc(vp, uiop, bp->b_rcred); 1517 } else { 1518 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1519 - bp->b_dirtyoff; 1520 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1521 + bp->b_dirtyoff; 1522 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1523 uiop->uio_rw = UIO_WRITE; 1524 nfsstats.write_bios++; 1525 bp->b_error = error = nfs_writerpc(vp, uiop, bp->b_wcred); 1526 if (error) { 1527 np->n_error = error; 1528 np->n_flag |= NWRITEERR; 1529 } 1530 bp->b_dirtyoff = bp->b_dirtyend = 0; 1531 } 1532 } 1533 if (error) 1534 bp->b_flags |= B_ERROR; 1535 bp->b_resid = uiop->uio_resid; 1536 biodone(bp); 1537 return (error); 1538 } 1539 1540 /* 1541 * Flush all the blocks associated with a vnode. 1542 * Walk through the buffer pool and push any dirty pages 1543 * associated with the vnode. 1544 */ 1545 /* ARGSUSED */ 1546 nfs_fsync(vp, fflags, cred, waitfor) 1547 register struct vnode *vp; 1548 int fflags; 1549 struct ucred *cred; 1550 int waitfor; 1551 { 1552 register struct nfsnode *np = VTONFS(vp); 1553 int error = 0; 1554 1555 if (np->n_flag & NMODIFIED) { 1556 np->n_flag &= ~NMODIFIED; 1557 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1558 } 1559 if (!error && (np->n_flag & NWRITEERR)) 1560 error = np->n_error; 1561 return (error); 1562 } 1563 1564 /* 1565 * Print out the contents of an nfsnode. 1566 */ 1567 nfs_print(vp) 1568 struct vnode *vp; 1569 { 1570 register struct nfsnode *np = VTONFS(vp); 1571 1572 printf("tag VT_NFS, fileid %d fsid 0x%x", 1573 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1574 #ifdef FIFO 1575 if (vp->v_type == VFIFO) 1576 fifo_printinfo(vp); 1577 #endif /* FIFO */ 1578 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1579 if (np->n_lockholder == 0) 1580 return; 1581 printf("\towner pid %d", np->n_lockholder); 1582 if (np->n_lockwaiter) 1583 printf(" waiting pid %d", np->n_lockwaiter); 1584 printf("\n"); 1585 } 1586