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 7.42 (Berkeley) 06/21/90 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 "kernel.h" 33 #include "mount.h" 34 #include "buf.h" 35 #include "vm.h" 36 #include "malloc.h" 37 #include "mbuf.h" 38 #include "errno.h" 39 #include "file.h" 40 #include "conf.h" 41 #include "vnode.h" 42 #include "text.h" 43 #include "map.h" 44 #include "../ufs/quota.h" 45 #include "../ufs/inode.h" 46 #include "nfsv2.h" 47 #include "nfs.h" 48 #include "nfsnode.h" 49 #include "nfsmount.h" 50 #include "xdr_subs.h" 51 #include "nfsm_subs.h" 52 #include "nfsiom.h" 53 54 /* Defs */ 55 #define TRUE 1 56 #define FALSE 0 57 58 /* Global vars */ 59 int nfs_lookup(), 60 nfs_create(), 61 nfs_mknod(), 62 nfs_open(), 63 nfs_close(), 64 nfs_access(), 65 nfs_getattr(), 66 nfs_setattr(), 67 nfs_read(), 68 nfs_write(), 69 vfs_noop(), 70 vfs_nullop(), 71 nfs_remove(), 72 nfs_link(), 73 nfs_rename(), 74 nfs_mkdir(), 75 nfs_rmdir(), 76 nfs_symlink(), 77 nfs_readdir(), 78 nfs_readlink(), 79 nfs_abortop(), 80 nfs_lock(), 81 nfs_unlock(), 82 nfs_bmap(), 83 nfs_strategy(), 84 nfs_fsync(), 85 nfs_inactive(), 86 nfs_reclaim(), 87 nfs_print(), 88 nfs_islocked(); 89 90 struct vnodeops nfsv2_vnodeops = { 91 nfs_lookup, /* lookup */ 92 nfs_create, /* create */ 93 nfs_mknod, /* mknod */ 94 nfs_open, /* open */ 95 nfs_close, /* close */ 96 nfs_access, /* access */ 97 nfs_getattr, /* getattr */ 98 nfs_setattr, /* setattr */ 99 nfs_read, /* read */ 100 nfs_write, /* write */ 101 vfs_noop, /* ioctl */ 102 vfs_noop, /* select */ 103 vfs_noop, /* mmap */ 104 nfs_fsync, /* fsync */ 105 vfs_nullop, /* seek */ 106 nfs_remove, /* remove */ 107 nfs_link, /* link */ 108 nfs_rename, /* rename */ 109 nfs_mkdir, /* mkdir */ 110 nfs_rmdir, /* rmdir */ 111 nfs_symlink, /* symlink */ 112 nfs_readdir, /* readdir */ 113 nfs_readlink, /* readlink */ 114 nfs_abortop, /* abortop */ 115 nfs_inactive, /* inactive */ 116 nfs_reclaim, /* reclaim */ 117 nfs_lock, /* lock */ 118 nfs_unlock, /* unlock */ 119 nfs_bmap, /* bmap */ 120 nfs_strategy, /* strategy */ 121 nfs_print, /* print */ 122 nfs_islocked, /* islocked */ 123 }; 124 125 /* Special device vnode ops */ 126 int spec_lookup(), 127 spec_open(), 128 spec_read(), 129 spec_write(), 130 spec_strategy(), 131 spec_bmap(), 132 spec_ioctl(), 133 spec_select(), 134 spec_close(), 135 spec_badop(), 136 spec_nullop(); 137 138 struct vnodeops spec_nfsv2nodeops = { 139 spec_lookup, /* lookup */ 140 spec_badop, /* create */ 141 spec_badop, /* mknod */ 142 spec_open, /* open */ 143 spec_close, /* close */ 144 nfs_access, /* access */ 145 nfs_getattr, /* getattr */ 146 nfs_setattr, /* setattr */ 147 spec_read, /* read */ 148 spec_write, /* write */ 149 spec_ioctl, /* ioctl */ 150 spec_select, /* select */ 151 spec_badop, /* mmap */ 152 spec_nullop, /* fsync */ 153 spec_badop, /* seek */ 154 spec_badop, /* remove */ 155 spec_badop, /* link */ 156 spec_badop, /* rename */ 157 spec_badop, /* mkdir */ 158 spec_badop, /* rmdir */ 159 spec_badop, /* symlink */ 160 spec_badop, /* readdir */ 161 spec_badop, /* readlink */ 162 spec_badop, /* abortop */ 163 nfs_inactive, /* inactive */ 164 nfs_reclaim, /* reclaim */ 165 nfs_lock, /* lock */ 166 nfs_unlock, /* unlock */ 167 spec_bmap, /* bmap */ 168 spec_strategy, /* strategy */ 169 nfs_print, /* print */ 170 nfs_islocked, /* islocked */ 171 }; 172 173 #ifdef FIFO 174 int fifo_lookup(), 175 fifo_open(), 176 fifo_read(), 177 fifo_write(), 178 fifo_bmap(), 179 fifo_ioctl(), 180 fifo_select(), 181 fifo_close(), 182 fifo_print(), 183 fifo_badop(), 184 fifo_nullop(); 185 186 struct vnodeops fifo_nfsv2nodeops = { 187 fifo_lookup, /* lookup */ 188 fifo_badop, /* create */ 189 fifo_badop, /* mknod */ 190 fifo_open, /* open */ 191 fifo_close, /* close */ 192 nfs_access, /* access */ 193 nfs_getattr, /* getattr */ 194 nfs_setattr, /* setattr */ 195 fifo_read, /* read */ 196 fifo_write, /* write */ 197 fifo_ioctl, /* ioctl */ 198 fifo_select, /* select */ 199 fifo_badop, /* mmap */ 200 fifo_nullop, /* fsync */ 201 fifo_badop, /* seek */ 202 fifo_badop, /* remove */ 203 fifo_badop, /* link */ 204 fifo_badop, /* rename */ 205 fifo_badop, /* mkdir */ 206 fifo_badop, /* rmdir */ 207 fifo_badop, /* symlink */ 208 fifo_badop, /* readdir */ 209 fifo_badop, /* readlink */ 210 fifo_badop, /* abortop */ 211 nfs_inactive, /* inactive */ 212 nfs_reclaim, /* reclaim */ 213 nfs_lock, /* lock */ 214 nfs_unlock, /* unlock */ 215 fifo_bmap, /* bmap */ 216 fifo_badop, /* strategy */ 217 nfs_print, /* print */ 218 nfs_islocked, /* islocked */ 219 }; 220 #endif /* FIFO */ 221 222 extern u_long nfs_procids[NFS_NPROCS]; 223 extern u_long nfs_prog, nfs_vers; 224 extern char nfsiobuf[MAXPHYS+NBPG]; 225 struct map nfsmap[NFS_MSIZ]; 226 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 227 int nfs_asyncdaemons = 0; 228 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 229 static int nfsmap_want = 0; 230 231 /* 232 * nfs null call from vfs. 233 */ 234 nfs_null(vp, cred) 235 struct vnode *vp; 236 struct ucred *cred; 237 { 238 caddr_t bpos, dpos; 239 u_long xid; 240 int error = 0; 241 struct mbuf *mreq, *mrep, *md, *mb; 242 243 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 244 nfsm_request(vp, NFSPROC_NULL, u.u_procp, 0); 245 nfsm_reqdone; 246 return (error); 247 } 248 249 /* 250 * nfs access vnode op. 251 * Essentially just get vattr and then imitate iaccess() 252 */ 253 nfs_access(vp, mode, cred) 254 struct vnode *vp; 255 int mode; 256 register struct ucred *cred; 257 { 258 register struct vattr *vap; 259 register gid_t *gp; 260 struct vattr vattr; 261 register int i; 262 int error; 263 264 /* 265 * If you're the super-user, 266 * you always get access. 267 */ 268 if (cred->cr_uid == 0) 269 return (0); 270 vap = &vattr; 271 if (error = nfs_dogetattr(vp, vap, cred, 0)) 272 return (error); 273 /* 274 * Access check is based on only one of owner, group, public. 275 * If not owner, then check group. If not a member of the 276 * group, then check public access. 277 */ 278 if (cred->cr_uid != vap->va_uid) { 279 mode >>= 3; 280 gp = cred->cr_groups; 281 for (i = 0; i < cred->cr_ngroups; i++, gp++) 282 if (vap->va_gid == *gp) 283 goto found; 284 mode >>= 3; 285 found: 286 ; 287 } 288 if ((vap->va_mode & mode) != 0) 289 return (0); 290 return (EACCES); 291 } 292 293 /* 294 * nfs open vnode op 295 * Just check to see if the type is ok 296 */ 297 /* ARGSUSED */ 298 nfs_open(vp, mode, cred) 299 struct vnode *vp; 300 int mode; 301 struct ucred *cred; 302 { 303 register enum vtype vtyp; 304 305 vtyp = vp->v_type; 306 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 307 return (0); 308 else 309 return (EACCES); 310 } 311 312 /* 313 * nfs close vnode op 314 * For reg files, invalidate any buffer cache entries. 315 */ 316 /* ARGSUSED */ 317 nfs_close(vp, fflags, cred) 318 register struct vnode *vp; 319 int fflags; 320 struct ucred *cred; 321 { 322 register struct nfsnode *np = VTONFS(vp); 323 int error = 0; 324 325 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 326 nfs_lock(vp); 327 np->n_flag &= ~NMODIFIED; 328 vinvalbuf(vp, TRUE); 329 np->n_attrstamp = 0; 330 if (np->n_flag & NWRITEERR) { 331 np->n_flag &= ~NWRITEERR; 332 error = np->n_error; 333 } 334 nfs_unlock(vp); 335 } 336 return (error); 337 } 338 339 /* 340 * nfs getattr call from vfs. 341 */ 342 nfs_getattr(vp, vap, cred) 343 register struct vnode *vp; 344 struct vattr *vap; 345 struct ucred *cred; 346 { 347 return (nfs_dogetattr(vp, vap, cred, 0)); 348 } 349 350 nfs_dogetattr(vp, vap, cred, tryhard) 351 register struct vnode *vp; 352 struct vattr *vap; 353 struct ucred *cred; 354 int tryhard; 355 { 356 register caddr_t cp; 357 register long t1; 358 caddr_t bpos, dpos; 359 u_long xid; 360 int error = 0; 361 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 362 363 /* First look in the cache.. */ 364 if (nfs_getattrcache(vp, vap) == 0) 365 return (0); 366 nfsstats.rpccnt[NFSPROC_GETATTR]++; 367 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 368 nfsm_fhtom(vp); 369 nfsm_request(vp, NFSPROC_GETATTR, u.u_procp, tryhard); 370 nfsm_loadattr(vp, vap); 371 nfsm_reqdone; 372 return (error); 373 } 374 375 /* 376 * nfs setattr call. 377 */ 378 nfs_setattr(vp, vap, cred) 379 register struct vnode *vp; 380 register struct vattr *vap; 381 struct ucred *cred; 382 { 383 register struct nfsv2_sattr *sp; 384 register caddr_t cp; 385 register long t1; 386 caddr_t bpos, dpos; 387 u_long xid; 388 int error = 0; 389 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 390 struct nfsnode *np; 391 392 nfsstats.rpccnt[NFSPROC_SETATTR]++; 393 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 394 nfsm_fhtom(vp); 395 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 396 if (vap->va_mode == 0xffff) 397 sp->sa_mode = VNOVAL; 398 else 399 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 400 if (vap->va_uid == 0xffff) 401 sp->sa_uid = VNOVAL; 402 else 403 sp->sa_uid = txdr_unsigned(vap->va_uid); 404 if (vap->va_gid == 0xffff) 405 sp->sa_gid = VNOVAL; 406 else 407 sp->sa_gid = txdr_unsigned(vap->va_gid); 408 sp->sa_size = txdr_unsigned(vap->va_size); 409 if (vap->va_size != VNOVAL) { 410 np = VTONFS(vp); 411 if (np->n_flag & NMODIFIED) { 412 np->n_flag &= ~NMODIFIED; 413 vinvalbuf(vp, TRUE); 414 np->n_attrstamp = 0; 415 } 416 } 417 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 418 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 419 txdr_time(&vap->va_mtime, &sp->sa_mtime); 420 nfsm_request(vp, NFSPROC_SETATTR, u.u_procp, 1); 421 nfsm_loadattr(vp, (struct vattr *)0); 422 /* should we fill in any vap fields ?? */ 423 nfsm_reqdone; 424 return (error); 425 } 426 427 /* 428 * nfs lookup call, one step at a time... 429 * First look in cache 430 * If not found, unlock the directory nfsnode and do the rpc 431 */ 432 nfs_lookup(vp, ndp) 433 register struct vnode *vp; 434 register struct nameidata *ndp; 435 { 436 register struct vnode *vdp; 437 register u_long *p; 438 register caddr_t cp; 439 register long t1, t2; 440 caddr_t bpos, dpos, cp2; 441 u_long xid; 442 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 443 struct vnode *newvp; 444 long len; 445 nfsv2fh_t *fhp; 446 struct nfsnode *np; 447 int lockparent, wantparent, flag, error = 0; 448 449 ndp->ni_dvp = vp; 450 ndp->ni_vp = NULL; 451 if (vp->v_type != VDIR) 452 return (ENOTDIR); 453 lockparent = ndp->ni_nameiop & LOCKPARENT; 454 flag = ndp->ni_nameiop & OPFLAG; 455 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 456 if ((error = cache_lookup(ndp)) && error != ENOENT) { 457 struct vattr vattr; 458 int vpid; 459 460 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 461 panic("nfs_lookup: .. through root"); 462 vdp = ndp->ni_vp; 463 vpid = vdp->v_id; 464 /* 465 * See the comment starting `Step through' in ufs/ufs_lookup.c 466 * for an explanation of the locking protocol 467 */ 468 if (vp == vdp) { 469 VREF(vdp); 470 error = 0; 471 } else if (ndp->ni_isdotdot) { 472 nfs_unlock(vp); 473 error = vget(vdp); 474 } else { 475 error = vget(vdp); 476 nfs_unlock(vp); 477 } 478 if (!error) { 479 if (vpid == vdp->v_id) { 480 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0) && 481 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 482 nfsstats.lookupcache_hits++; 483 return (0); 484 } else { 485 cache_purge(vdp); 486 nfs_nput(vdp); 487 } 488 } else { 489 nfs_nput(vdp); 490 } 491 } 492 ndp->ni_vp = NULLVP; 493 } else 494 nfs_unlock(vp); 495 error = 0; 496 nfsstats.lookupcache_misses++; 497 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 498 len = ndp->ni_namelen; 499 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 500 nfsm_fhtom(vp); 501 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 502 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 0); 503 nfsmout: 504 if (error) { 505 if (lockparent || (flag != CREATE && flag != RENAME) || 506 *ndp->ni_next != 0) 507 nfs_lock(vp); 508 return (error); 509 } 510 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 511 512 /* 513 * Handle DELETE and RENAME cases... 514 */ 515 if (flag == DELETE && *ndp->ni_next == 0) { 516 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 517 VREF(vp); 518 newvp = vp; 519 np = VTONFS(vp); 520 } else { 521 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 522 nfs_lock(vp); 523 m_freem(mrep); 524 return (error); 525 } 526 newvp = NFSTOV(np); 527 } 528 if (error = 529 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 530 nfs_lock(vp); 531 if (newvp != vp) 532 nfs_nput(newvp); 533 else 534 vrele(vp); 535 m_freem(mrep); 536 return (error); 537 } 538 ndp->ni_vp = newvp; 539 if (lockparent || vp == newvp) 540 nfs_lock(vp); 541 m_freem(mrep); 542 return (0); 543 } 544 545 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 546 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 547 nfs_lock(vp); 548 m_freem(mrep); 549 return (EISDIR); 550 } 551 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 552 nfs_lock(vp); 553 m_freem(mrep); 554 return (error); 555 } 556 newvp = NFSTOV(np); 557 if (error = 558 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 559 nfs_lock(vp); 560 nfs_nput(newvp); 561 m_freem(mrep); 562 return (error); 563 } 564 ndp->ni_vp = newvp; 565 if (lockparent) 566 nfs_lock(vp); 567 return (0); 568 } 569 570 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 571 VREF(vp); 572 newvp = vp; 573 np = VTONFS(vp); 574 } else if (ndp->ni_isdotdot) { 575 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 576 nfs_lock(vp); 577 m_freem(mrep); 578 return (error); 579 } 580 newvp = NFSTOV(np); 581 } else { 582 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 583 nfs_lock(vp); 584 m_freem(mrep); 585 return (error); 586 } 587 newvp = NFSTOV(np); 588 } 589 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 590 nfs_lock(vp); 591 if (newvp != vp) 592 nfs_nput(newvp); 593 else 594 vrele(vp); 595 m_freem(mrep); 596 return (error); 597 } 598 m_freem(mrep); 599 600 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 601 nfs_lock(vp); 602 ndp->ni_vp = newvp; 603 if (error == 0 && ndp->ni_makeentry) { 604 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 605 cache_enter(ndp); 606 } 607 return (error); 608 } 609 610 /* 611 * nfs read call. 612 * Just call nfs_bioread() to do the work. 613 */ 614 nfs_read(vp, uiop, ioflag, cred) 615 register struct vnode *vp; 616 struct uio *uiop; 617 int ioflag; 618 struct ucred *cred; 619 { 620 if (vp->v_type != VREG) 621 return (EPERM); 622 return (nfs_bioread(vp, uiop, ioflag, cred)); 623 } 624 625 /* 626 * nfs readlink call 627 */ 628 nfs_readlink(vp, uiop, cred) 629 struct vnode *vp; 630 struct uio *uiop; 631 struct ucred *cred; 632 { 633 if (vp->v_type != VLNK) 634 return (EPERM); 635 return (nfs_bioread(vp, uiop, 0, cred)); 636 } 637 638 /* 639 * Do a readlink rpc. 640 * Called by nfs_doio() from below the buffer cache. 641 */ 642 nfs_readlinkrpc(vp, uiop, cred, procp) 643 register struct vnode *vp; 644 struct uio *uiop; 645 struct ucred *cred; 646 struct proc *procp; 647 { 648 register u_long *p; 649 register caddr_t cp; 650 register long t1; 651 caddr_t bpos, dpos, cp2; 652 u_long xid; 653 int error = 0; 654 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 655 long len; 656 657 nfsstats.rpccnt[NFSPROC_READLINK]++; 658 nfs_unlock(vp); 659 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 660 nfsm_fhtom(vp); 661 nfsm_request(vp, NFSPROC_READLINK, procp, 0); 662 nfsm_strsiz(len, NFS_MAXPATHLEN); 663 nfsm_mtouio(uiop, len); 664 nfsm_reqdone; 665 nfs_lock(vp); 666 return (error); 667 } 668 669 /* 670 * nfs read rpc call 671 * Ditto above 672 */ 673 nfs_readrpc(vp, uiop, cred, procp) 674 register struct vnode *vp; 675 struct uio *uiop; 676 struct ucred *cred; 677 struct proc *procp; 678 { 679 register u_long *p; 680 register caddr_t cp; 681 register long t1; 682 caddr_t bpos, dpos, cp2; 683 u_long xid; 684 int error = 0; 685 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 686 struct nfsmount *nmp; 687 long len, retlen, tsiz; 688 689 nmp = VFSTONFS(vp->v_mount); 690 tsiz = uiop->uio_resid; 691 while (tsiz > 0) { 692 nfsstats.rpccnt[NFSPROC_READ]++; 693 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 694 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 695 nfsm_fhtom(vp); 696 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 697 *p++ = txdr_unsigned(uiop->uio_offset); 698 *p++ = txdr_unsigned(len); 699 *p = 0; 700 nfsm_request(vp, NFSPROC_READ, procp, 1); 701 nfsm_loadattr(vp, (struct vattr *)0); 702 nfsm_strsiz(retlen, nmp->nm_rsize); 703 nfsm_mtouio(uiop, retlen); 704 m_freem(mrep); 705 if (retlen < len) 706 tsiz = 0; 707 else 708 tsiz -= len; 709 } 710 nfsmout: 711 return (error); 712 } 713 714 /* 715 * nfs write call 716 */ 717 nfs_writerpc(vp, uiop, cred, procp) 718 register struct vnode *vp; 719 struct uio *uiop; 720 struct ucred *cred; 721 struct proc *procp; 722 { 723 register u_long *p; 724 register caddr_t cp; 725 register long t1; 726 caddr_t bpos, dpos; 727 u_long xid; 728 int error = 0; 729 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 730 struct nfsmount *nmp; 731 long len, tsiz; 732 733 nmp = VFSTONFS(vp->v_mount); 734 tsiz = uiop->uio_resid; 735 while (tsiz > 0) { 736 nfsstats.rpccnt[NFSPROC_WRITE]++; 737 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 738 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 739 NFSX_FH+NFSX_UNSIGNED*4); 740 nfsm_fhtom(vp); 741 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 742 *(p+1) = txdr_unsigned(uiop->uio_offset); 743 *(p+3) = txdr_unsigned(len); 744 nfsm_uiotom(uiop, len); 745 nfsm_request(vp, NFSPROC_WRITE, procp, 1); 746 nfsm_loadattr(vp, (struct vattr *)0); 747 m_freem(mrep); 748 tsiz -= len; 749 } 750 nfsmout: 751 return (error); 752 } 753 754 /* 755 * nfs mknod call 756 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 757 * set to specify the file type and the size field for rdev. 758 */ 759 /* ARGSUSED */ 760 nfs_mknod(ndp, vap, cred) 761 struct nameidata *ndp; 762 struct ucred *cred; 763 register struct vattr *vap; 764 { 765 register struct nfsv2_sattr *sp; 766 register u_long *p; 767 register caddr_t cp; 768 register long t1, t2; 769 caddr_t bpos, dpos; 770 u_long xid; 771 int error = 0; 772 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 773 u_long rdev; 774 775 if (vap->va_type == VCHR || vap->va_type == VBLK) 776 rdev = txdr_unsigned(vap->va_rdev); 777 #ifdef FIFO 778 else if (vap->va_type == VFIFO) 779 rdev = 0xffffffff; 780 #endif /* FIFO */ 781 else { 782 VOP_ABORTOP(ndp); 783 vput(ndp->ni_dvp); 784 return (EOPNOTSUPP); 785 } 786 nfsstats.rpccnt[NFSPROC_CREATE]++; 787 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 788 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 789 nfsm_fhtom(ndp->ni_dvp); 790 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 791 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 792 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 793 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 794 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 795 sp->sa_size = rdev; 796 /* or should these be VNOVAL ?? */ 797 txdr_time(&vap->va_atime, &sp->sa_atime); 798 txdr_time(&vap->va_mtime, &sp->sa_mtime); 799 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 800 nfsm_reqdone; 801 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 802 nfs_nput(ndp->ni_dvp); 803 return (error); 804 } 805 806 /* 807 * nfs file create call 808 */ 809 nfs_create(ndp, vap) 810 register struct nameidata *ndp; 811 register struct vattr *vap; 812 { 813 register struct nfsv2_sattr *sp; 814 register u_long *p; 815 register caddr_t cp; 816 register long t1, t2; 817 caddr_t bpos, dpos, cp2; 818 u_long xid; 819 int error = 0; 820 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 821 822 nfsstats.rpccnt[NFSPROC_CREATE]++; 823 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 824 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 825 nfsm_fhtom(ndp->ni_dvp); 826 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 827 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 828 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 829 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 830 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 831 sp->sa_size = txdr_unsigned(0); 832 /* or should these be VNOVAL ?? */ 833 txdr_time(&vap->va_atime, &sp->sa_atime); 834 txdr_time(&vap->va_mtime, &sp->sa_mtime); 835 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 836 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 837 nfsm_reqdone; 838 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 839 nfs_nput(ndp->ni_dvp); 840 return (error); 841 } 842 843 /* 844 * nfs file remove call 845 * To try and make nfs semantics closer to ufs semantics, a file that has 846 * other processes using the vnode is renamed instead of removed and then 847 * removed later on the last close. 848 * - If v_usecount > 1 849 * If a rename is not already in the works 850 * call nfs_sillyrename() to set it up 851 * else 852 * do the remove rpc 853 */ 854 nfs_remove(ndp) 855 register struct nameidata *ndp; 856 { 857 register struct vnode *vp = ndp->ni_vp; 858 register struct nfsnode *np = VTONFS(ndp->ni_vp); 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 if (vp->v_usecount > 1) { 868 if (!np->n_sillyrename) 869 error = nfs_sillyrename(ndp, REMOVE); 870 } else { 871 nfsstats.rpccnt[NFSPROC_REMOVE]++; 872 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 873 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 874 nfsm_fhtom(ndp->ni_dvp); 875 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 876 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 877 nfsm_reqdone; 878 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 879 /* 880 * Kludge City: If the first reply to the remove rpc is lost.. 881 * the reply to the retransmitted request will be ENOENT 882 * since the file was in fact removed 883 * Therefore, we cheat and return success. 884 */ 885 if (error == ENOENT) 886 error = 0; 887 } 888 np->n_attrstamp = 0; 889 if (ndp->ni_dvp == vp) 890 vrele(vp); 891 else 892 nfs_nput(ndp->ni_dvp); 893 nfs_nput(vp); 894 return (error); 895 } 896 897 /* 898 * nfs file remove rpc called from nfs_inactive 899 */ 900 nfs_removeit(ndp) 901 register struct nameidata *ndp; 902 { 903 register u_long *p; 904 register caddr_t cp; 905 register long t1, t2; 906 caddr_t bpos, dpos; 907 u_long xid; 908 int error = 0; 909 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 910 911 nfsstats.rpccnt[NFSPROC_REMOVE]++; 912 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 913 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 914 nfsm_fhtom(ndp->ni_dvp); 915 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 916 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 917 nfsm_reqdone; 918 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 919 return (error); 920 } 921 922 /* 923 * nfs file rename call 924 */ 925 nfs_rename(sndp, tndp) 926 register struct nameidata *sndp, *tndp; 927 { 928 register u_long *p; 929 register caddr_t cp; 930 register long t1, t2; 931 caddr_t bpos, dpos; 932 u_long xid; 933 int error = 0; 934 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 935 936 nfsstats.rpccnt[NFSPROC_RENAME]++; 937 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 938 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 939 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 940 nfsm_fhtom(sndp->ni_dvp); 941 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 942 nfsm_fhtom(tndp->ni_dvp); 943 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 944 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 945 nfsm_reqdone; 946 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 947 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 948 if (sndp->ni_vp->v_type == VDIR) { 949 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 950 cache_purge(tndp->ni_dvp); 951 cache_purge(sndp->ni_dvp); 952 } 953 VOP_ABORTOP(tndp); 954 vput(tndp->ni_dvp); 955 if (tndp->ni_vp) 956 vput(tndp->ni_vp); 957 VOP_ABORTOP(sndp); 958 vrele(sndp->ni_dvp); 959 vrele(sndp->ni_vp); 960 /* 961 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 962 */ 963 if (error == ENOENT) 964 error = 0; 965 return (error); 966 } 967 968 /* 969 * nfs file rename rpc called from nfs_remove() above 970 */ 971 nfs_renameit(sndp, tndp) 972 register struct nameidata *sndp, *tndp; 973 { 974 register u_long *p; 975 register caddr_t cp; 976 register long t1, t2; 977 caddr_t bpos, dpos; 978 u_long xid; 979 int error = 0; 980 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 981 982 nfsstats.rpccnt[NFSPROC_RENAME]++; 983 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 984 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 985 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 986 nfsm_fhtom(sndp->ni_dvp); 987 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 988 nfsm_fhtom(tndp->ni_dvp); 989 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 990 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 991 nfsm_reqdone; 992 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 993 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 994 return (error); 995 } 996 997 /* 998 * nfs hard link create call 999 */ 1000 nfs_link(vp, ndp) 1001 register struct vnode *vp; 1002 register struct nameidata *ndp; 1003 { 1004 register u_long *p; 1005 register caddr_t cp; 1006 register long t1, t2; 1007 caddr_t bpos, dpos; 1008 u_long xid; 1009 int error = 0; 1010 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1011 1012 if (ndp->ni_dvp != vp) 1013 nfs_lock(vp); 1014 nfsstats.rpccnt[NFSPROC_LINK]++; 1015 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1016 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1017 nfsm_fhtom(vp); 1018 nfsm_fhtom(ndp->ni_dvp); 1019 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1020 nfsm_request(vp, NFSPROC_LINK, u.u_procp, 1); 1021 nfsm_reqdone; 1022 VTONFS(vp)->n_attrstamp = 0; 1023 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1024 if (ndp->ni_dvp != vp) 1025 nfs_unlock(vp); 1026 nfs_nput(ndp->ni_dvp); 1027 /* 1028 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1029 */ 1030 if (error == EEXIST) 1031 error = 0; 1032 return (error); 1033 } 1034 1035 /* 1036 * nfs symbolic link create call 1037 */ 1038 nfs_symlink(ndp, vap, nm) 1039 struct nameidata *ndp; 1040 struct vattr *vap; 1041 char *nm; /* is this the path ?? */ 1042 { 1043 register struct nfsv2_sattr *sp; 1044 register u_long *p; 1045 register caddr_t cp; 1046 register long t1, t2; 1047 caddr_t bpos, dpos; 1048 u_long xid; 1049 int error = 0; 1050 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1051 1052 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1053 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1054 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 1055 nfsm_fhtom(ndp->ni_dvp); 1056 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1057 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1058 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1059 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1060 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1061 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1062 sp->sa_size = txdr_unsigned(VNOVAL); 1063 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1064 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1065 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, u.u_procp, 1); 1066 nfsm_reqdone; 1067 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1068 nfs_nput(ndp->ni_dvp); 1069 /* 1070 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1071 */ 1072 if (error == EEXIST) 1073 error = 0; 1074 return (error); 1075 } 1076 1077 /* 1078 * nfs make dir call 1079 */ 1080 nfs_mkdir(ndp, vap) 1081 register struct nameidata *ndp; 1082 struct vattr *vap; 1083 { 1084 register struct nfsv2_sattr *sp; 1085 register u_long *p; 1086 register caddr_t cp; 1087 register long t1, t2; 1088 register int len; 1089 caddr_t bpos, dpos, cp2; 1090 u_long xid; 1091 int error = 0, firsttry = 1; 1092 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1093 1094 len = ndp->ni_dent.d_namlen; 1095 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1096 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1097 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1098 nfsm_fhtom(ndp->ni_dvp); 1099 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1100 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1101 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1102 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1103 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1104 sp->sa_size = txdr_unsigned(VNOVAL); 1105 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1106 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1107 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, u.u_procp, 1); 1108 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1109 nfsm_reqdone; 1110 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1111 /* 1112 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1113 * if we can succeed in looking up the directory. 1114 * "firsttry" is necessary since the macros may "goto nfsmout" which 1115 * is above the if on errors. (Ugh) 1116 */ 1117 if (error == EEXIST && firsttry) { 1118 firsttry = 0; 1119 error = 0; 1120 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1121 ndp->ni_vp = NULL; 1122 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1123 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1124 nfsm_fhtom(ndp->ni_dvp); 1125 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1126 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp, 1); 1127 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1128 if (ndp->ni_vp->v_type != VDIR) { 1129 vput(ndp->ni_vp); 1130 error = EEXIST; 1131 } 1132 m_freem(mrep); 1133 } 1134 nfs_nput(ndp->ni_dvp); 1135 return (error); 1136 } 1137 1138 /* 1139 * nfs remove directory call 1140 */ 1141 nfs_rmdir(ndp) 1142 register struct nameidata *ndp; 1143 { 1144 register u_long *p; 1145 register caddr_t cp; 1146 register long t1, t2; 1147 caddr_t bpos, dpos; 1148 u_long xid; 1149 int error = 0; 1150 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1151 1152 if (ndp->ni_dvp == ndp->ni_vp) { 1153 vrele(ndp->ni_dvp); 1154 nfs_nput(ndp->ni_dvp); 1155 return (EINVAL); 1156 } 1157 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1158 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1159 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1160 nfsm_fhtom(ndp->ni_dvp); 1161 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1162 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, u.u_procp, 1); 1163 nfsm_reqdone; 1164 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1165 cache_purge(ndp->ni_dvp); 1166 cache_purge(ndp->ni_vp); 1167 nfs_nput(ndp->ni_vp); 1168 nfs_nput(ndp->ni_dvp); 1169 /* 1170 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1171 */ 1172 if (error == ENOENT) 1173 error = 0; 1174 return (error); 1175 } 1176 1177 /* 1178 * nfs readdir call 1179 * Although cookie is defined as opaque, I translate it to/from net byte 1180 * order so that it looks more sensible. This appears consistent with the 1181 * Ultrix implementation of NFS. 1182 */ 1183 nfs_readdir(vp, uiop, cred, eofflagp) 1184 register struct vnode *vp; 1185 struct uio *uiop; 1186 struct ucred *cred; 1187 int *eofflagp; 1188 { 1189 register struct nfsnode *np = VTONFS(vp); 1190 int tresid, error; 1191 struct vattr vattr; 1192 1193 if (vp->v_type != VDIR) 1194 return (EPERM); 1195 /* 1196 * First, check for hit on the EOF offset cache 1197 */ 1198 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1199 (np->n_flag & NMODIFIED) == 0 && 1200 nfs_dogetattr(vp, &vattr, cred, 0) == 0 && 1201 np->n_mtime == vattr.va_mtime.tv_sec) { 1202 *eofflagp = 1; 1203 nfsstats.direofcache_hits++; 1204 return (0); 1205 } 1206 1207 /* 1208 * Call nfs_bioread() to do the real work. 1209 */ 1210 tresid = uiop->uio_resid; 1211 error = nfs_bioread(vp, uiop, 0, cred); 1212 1213 if (!error && uiop->uio_resid == tresid) { 1214 *eofflagp = 1; 1215 nfsstats.direofcache_misses++; 1216 } else 1217 *eofflagp = 0; 1218 return (error); 1219 } 1220 1221 /* 1222 * Readdir rpc call. 1223 * Called from below the buffer cache by nfs_doio(). 1224 */ 1225 nfs_readdirrpc(vp, uiop, cred, procp) 1226 register struct vnode *vp; 1227 struct uio *uiop; 1228 struct ucred *cred; 1229 struct proc *procp; 1230 { 1231 register long len; 1232 register struct direct *dp; 1233 register u_long *p; 1234 register caddr_t cp; 1235 register long t1; 1236 long tlen, lastlen; 1237 caddr_t bpos, dpos, cp2; 1238 u_long xid; 1239 int error = 0; 1240 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1241 struct mbuf *md2; 1242 caddr_t dpos2; 1243 int siz; 1244 int more_dirs = 1; 1245 off_t off, savoff; 1246 struct direct *savdp; 1247 struct nfsmount *nmp; 1248 struct nfsnode *np = VTONFS(vp); 1249 long tresid; 1250 1251 nmp = VFSTONFS(vp->v_mount); 1252 tresid = uiop->uio_resid; 1253 /* 1254 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1255 * whichever is smaller, truncated to a multiple of DIRBLKSIZ. 1256 * The stopping criteria is EOF or buffer full. 1257 */ 1258 while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) { 1259 nfsstats.rpccnt[NFSPROC_READDIR]++; 1260 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1261 nfsm_fhtom(vp); 1262 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1263 *p++ = txdr_unsigned(uiop->uio_offset); 1264 *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1265 nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1)); 1266 nfsm_request(vp, NFSPROC_READDIR, procp, 0); 1267 siz = 0; 1268 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1269 more_dirs = fxdr_unsigned(int, *p); 1270 1271 /* Save the position so that we can do nfsm_mtouio() later */ 1272 dpos2 = dpos; 1273 md2 = md; 1274 1275 /* loop thru the dir entries, doctoring them to 4bsd form */ 1276 off = uiop->uio_offset; 1277 #ifdef lint 1278 dp = (struct direct *)0; 1279 #endif /* lint */ 1280 while (more_dirs && siz < uiop->uio_resid) { 1281 savoff = off; /* Hold onto offset and dp */ 1282 savdp = dp; 1283 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1284 dp = (struct direct *)p; 1285 dp->d_ino = fxdr_unsigned(u_long, *p++); 1286 len = fxdr_unsigned(int, *p); 1287 if (len <= 0 || len > NFS_MAXNAMLEN) { 1288 error = EBADRPC; 1289 m_freem(mrep); 1290 goto nfsmout; 1291 } 1292 dp->d_namlen = (u_short)len; 1293 nfsm_adv(len); /* Point past name */ 1294 tlen = nfsm_rndup(len); 1295 /* 1296 * This should not be necessary, but some servers have 1297 * broken XDR such that these bytes are not null filled. 1298 */ 1299 if (tlen != len) { 1300 *dpos = '\0'; /* Null-terminate */ 1301 nfsm_adv(tlen - len); 1302 len = tlen; 1303 } 1304 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1305 off = fxdr_unsigned(off_t, *p); 1306 *p++ = 0; /* Ensures null termination of name */ 1307 more_dirs = fxdr_unsigned(int, *p); 1308 dp->d_reclen = len+4*NFSX_UNSIGNED; 1309 siz += dp->d_reclen; 1310 } 1311 /* 1312 * If at end of rpc data, get the eof boolean 1313 */ 1314 if (!more_dirs) { 1315 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1316 more_dirs = (fxdr_unsigned(int, *p) == 0); 1317 1318 /* 1319 * If at EOF, cache directory offset 1320 */ 1321 if (!more_dirs) 1322 np->n_direofoffset = off; 1323 } 1324 /* 1325 * If there is too much to fit in the data buffer, use savoff and 1326 * savdp to trim off the last record. 1327 * --> we are not at eof 1328 */ 1329 if (siz > uiop->uio_resid) { 1330 off = savoff; 1331 siz -= dp->d_reclen; 1332 dp = savdp; 1333 more_dirs = 0; /* Paranoia */ 1334 } 1335 if (siz > 0) { 1336 lastlen = dp->d_reclen; 1337 md = md2; 1338 dpos = dpos2; 1339 nfsm_mtouio(uiop, siz); 1340 uiop->uio_offset = off; 1341 } else 1342 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1343 m_freem(mrep); 1344 } 1345 /* 1346 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 1347 * by increasing d_reclen for the last record. 1348 */ 1349 if (uiop->uio_resid < tresid) { 1350 len = uiop->uio_resid & (DIRBLKSIZ - 1); 1351 if (len > 0) { 1352 dp = (struct direct *) 1353 (uiop->uio_iov->iov_base - lastlen); 1354 dp->d_reclen += len; 1355 uiop->uio_iov->iov_base += len; 1356 uiop->uio_iov->iov_len -= len; 1357 uiop->uio_resid -= len; 1358 } 1359 } 1360 nfsmout: 1361 return (error); 1362 } 1363 1364 static char hextoasc[] = "0123456789abcdef"; 1365 1366 /* 1367 * Silly rename. To make the NFS filesystem that is stateless look a little 1368 * more like the "ufs" a remove of an active vnode is translated to a rename 1369 * to a funny looking filename that is removed by nfs_inactive on the 1370 * nfsnode. There is the potential for another process on a different client 1371 * to create the same funny name between the nfs_lookitup() fails and the 1372 * nfs_rename() completes, but... 1373 */ 1374 nfs_sillyrename(ndp, flag) 1375 register struct nameidata *ndp; 1376 int flag; 1377 { 1378 register struct nfsnode *np; 1379 register struct sillyrename *sp; 1380 register struct nameidata *tndp; 1381 int error; 1382 short pid; 1383 1384 np = VTONFS(ndp->ni_dvp); 1385 cache_purge(ndp->ni_dvp); 1386 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1387 M_TEMP, M_WAITOK); 1388 sp->s_flag = flag; 1389 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1390 np = VTONFS(ndp->ni_vp); 1391 tndp = &sp->s_namei; 1392 tndp->ni_cred = crdup(ndp->ni_cred); 1393 1394 /* Fudge together a funny name */ 1395 pid = u.u_procp->p_pid; 1396 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1397 tndp->ni_dent.d_namlen = 12; 1398 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1399 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1400 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1401 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1402 1403 /* Try lookitups until we get one that isn't there */ 1404 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1405 tndp->ni_dent.d_name[4]++; 1406 if (tndp->ni_dent.d_name[4] > 'z') { 1407 error = EINVAL; 1408 goto bad; 1409 } 1410 } 1411 if (error = nfs_renameit(ndp, tndp)) 1412 goto bad; 1413 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1414 np->n_sillyrename = sp; 1415 return (0); 1416 bad: 1417 crfree(tndp->ni_cred); 1418 free((caddr_t)sp, M_TEMP); 1419 return (error); 1420 } 1421 1422 /* 1423 * Look up a file name for silly rename stuff. 1424 * Just like nfs_lookup() except that it doesn't load returned values 1425 * into the nfsnode table. 1426 * If fhp != NULL it copies the returned file handle out 1427 */ 1428 nfs_lookitup(vp, ndp, fhp) 1429 register struct vnode *vp; 1430 register struct nameidata *ndp; 1431 nfsv2fh_t *fhp; 1432 { 1433 register u_long *p; 1434 register caddr_t cp; 1435 register long t1, t2; 1436 caddr_t bpos, dpos, cp2; 1437 u_long xid; 1438 int error = 0; 1439 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1440 long len; 1441 1442 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1443 ndp->ni_dvp = vp; 1444 ndp->ni_vp = NULL; 1445 len = ndp->ni_dent.d_namlen; 1446 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1447 nfsm_fhtom(vp); 1448 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1449 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 1); 1450 if (fhp != NULL) { 1451 nfsm_disect(cp, caddr_t, NFSX_FH); 1452 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1453 } 1454 nfsm_reqdone; 1455 return (error); 1456 } 1457 1458 /* 1459 * Kludge City.. 1460 * - make nfs_bmap() essentially a no-op that does no translation 1461 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1462 * after mapping the physical addresses into Kernel Virtual space in the 1463 * nfsiobuf area. 1464 * (Maybe I could use the process's page mapping, but I was concerned that 1465 * Kernel Write might not be enabled and also figured copyout() would do 1466 * a lot more work than bcopy() and also it currently happens in the 1467 * context of the swapper process (2). 1468 */ 1469 nfs_bmap(vp, bn, vpp, bnp) 1470 struct vnode *vp; 1471 daddr_t bn; 1472 struct vnode **vpp; 1473 daddr_t *bnp; 1474 { 1475 if (vpp != NULL) 1476 *vpp = vp; 1477 if (bnp != NULL) 1478 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1479 return (0); 1480 } 1481 1482 /* 1483 * Strategy routine for phys. i/o 1484 * If the biod's are running, queue a request 1485 * otherwise just call nfs_doio() to get it done 1486 */ 1487 nfs_strategy(bp) 1488 register struct buf *bp; 1489 { 1490 register struct buf *dp; 1491 register int i; 1492 struct proc *rp; 1493 int error = 0; 1494 int fnd = 0; 1495 1496 /* 1497 * Set b_proc. It seems a bit silly to do it here, but since bread() 1498 * doesn't set it, I will. 1499 * Set b_proc == NULL for asynchronous reads, since these may still 1500 * be hanging about after the process terminates. 1501 */ 1502 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) 1503 bp->b_proc = (struct proc *)0; 1504 else 1505 bp->b_proc = u.u_procp; 1506 1507 /* 1508 * If an i/o daemon is waiting 1509 * queue the request, wake it up and wait for completion 1510 * otherwise just do it ourselves 1511 */ 1512 for (i = 0; i < nfs_asyncdaemons; i++) { 1513 if (rp = nfs_iodwant[i]) { 1514 /* 1515 * Ensure that the async_daemon is still waiting here 1516 */ 1517 if (rp->p_stat != SSLEEP || 1518 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1519 nfs_iodwant[i] = (struct proc *)0; 1520 continue; 1521 } 1522 dp = &nfs_bqueue; 1523 if (dp->b_actf == NULL) { 1524 dp->b_actl = bp; 1525 bp->b_actf = dp; 1526 } else { 1527 dp->b_actf->b_actl = bp; 1528 bp->b_actf = dp->b_actf; 1529 } 1530 dp->b_actf = bp; 1531 bp->b_actl = dp; 1532 fnd++; 1533 nfs_iodwant[i] = (struct proc *)0; 1534 wakeup((caddr_t)&nfs_iodwant[i]); 1535 break; 1536 } 1537 } 1538 if (!fnd) 1539 error = nfs_doio(bp); 1540 return (error); 1541 } 1542 1543 /* 1544 * Fun and games with i/o 1545 * Essentially play ubasetup() and disk interrupt service routine by 1546 * mapping the data buffer into kernel virtual space and doing the 1547 * nfs read or write rpc's from it. 1548 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1549 * otherwise it is called by the nfsiods to do what would normally be 1550 * partially disk interrupt driven. 1551 */ 1552 nfs_doio(bp) 1553 register struct buf *bp; 1554 { 1555 register struct uio *uiop; 1556 register struct vnode *vp; 1557 struct nfsnode *np; 1558 struct ucred *cr; 1559 struct proc *rp; 1560 int error; 1561 struct uio uio; 1562 struct iovec io; 1563 #if !defined(hp300) 1564 register struct pte *pte, *ppte; 1565 register caddr_t vaddr; 1566 int npf, npf2; 1567 int reg, o; 1568 caddr_t vbase; 1569 unsigned v; 1570 #endif 1571 1572 vp = bp->b_vp; 1573 np = VTONFS(vp); 1574 uiop = &uio; 1575 uiop->uio_iov = &io; 1576 uiop->uio_iovcnt = 1; 1577 uiop->uio_segflg = UIO_SYSSPACE; 1578 1579 /* 1580 * For phys i/o, map the b_addr into kernel virtual space using 1581 * the Nfsiomap pte's 1582 * Also, add a temporary b_rcred for reading using the process's uid 1583 * and a guess at a group 1584 */ 1585 if (bp->b_flags & B_PHYS) { 1586 bp->b_rcred = cr = crget(); 1587 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1588 cr->cr_uid = rp->p_uid; 1589 cr->cr_gid = 0; /* Anything ?? */ 1590 cr->cr_ngroups = 1; 1591 #if defined(hp300) 1592 /* mapping was already done by vmapbuf */ 1593 io.iov_base = bp->b_un.b_addr; 1594 #else 1595 o = (int)bp->b_un.b_addr & PGOFSET; 1596 npf2 = npf = btoc(bp->b_bcount + o); 1597 1598 /* 1599 * Get some mapping page table entries 1600 */ 1601 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1602 nfsmap_want++; 1603 (void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap", 1604 0); 1605 } 1606 reg--; 1607 if (bp->b_flags & B_PAGET) 1608 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1609 else { 1610 v = btop(bp->b_un.b_addr); 1611 if (bp->b_flags & B_UAREA) 1612 pte = &rp->p_addr[v]; 1613 else 1614 pte = vtopte(rp, v); 1615 } 1616 1617 /* 1618 * Play vmaccess() but with the Nfsiomap page table 1619 */ 1620 ppte = &Nfsiomap[reg]; 1621 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1622 while (npf != 0) { 1623 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1624 #if defined(tahoe) 1625 mtpr(P1DC, vaddr); 1626 #endif 1627 ppte++; 1628 pte++; 1629 vaddr += NBPG; 1630 --npf; 1631 } 1632 io.iov_base = vbase+o; 1633 #endif /* !defined(hp300) */ 1634 1635 /* 1636 * And do the i/o rpc 1637 */ 1638 io.iov_len = uiop->uio_resid = bp->b_bcount; 1639 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1640 if (bp->b_flags & B_READ) { 1641 uiop->uio_rw = UIO_READ; 1642 nfsstats.read_physios++; 1643 bp->b_error = error = nfs_readrpc(vp, uiop, 1644 bp->b_rcred, bp->b_proc); 1645 /* 1646 * If a text file has been modified since it was exec'd 1647 * blow the process' out of the water. This is the 1648 * closest we can come to "Text File Busy" in good old 1649 * stateless nfs. 1650 */ 1651 if ((vp->v_flag & VTEXT) && 1652 (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec)) 1653 xinval(vp); 1654 } else { 1655 uiop->uio_rw = UIO_WRITE; 1656 nfsstats.write_physios++; 1657 bp->b_error = error = nfs_writerpc(vp, uiop, 1658 bp->b_wcred, bp->b_proc); 1659 } 1660 1661 /* 1662 * Finally, release pte's used by physical i/o 1663 */ 1664 crfree(cr); 1665 #if !defined(hp300) 1666 rmfree(nfsmap, (long)npf2, (long)++reg); 1667 if (nfsmap_want) { 1668 nfsmap_want = 0; 1669 wakeup((caddr_t)&nfsmap_want); 1670 } 1671 #endif 1672 } else { 1673 if (bp->b_flags & B_READ) { 1674 io.iov_len = uiop->uio_resid = bp->b_bcount; 1675 io.iov_base = bp->b_un.b_addr; 1676 uiop->uio_rw = UIO_READ; 1677 switch (vp->v_type) { 1678 case VREG: 1679 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1680 nfsstats.read_bios++; 1681 error = nfs_readrpc(vp, uiop, bp->b_rcred, 1682 bp->b_proc); 1683 break; 1684 case VLNK: 1685 uiop->uio_offset = 0; 1686 nfsstats.readlink_bios++; 1687 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred, 1688 bp->b_proc); 1689 break; 1690 case VDIR: 1691 uiop->uio_offset = bp->b_lblkno; 1692 nfsstats.readdir_bios++; 1693 error = nfs_readdirrpc(vp, uiop, bp->b_rcred, 1694 bp->b_proc); 1695 /* 1696 * Save offset cookie in b_blkno. 1697 */ 1698 bp->b_blkno = uiop->uio_offset; 1699 break; 1700 }; 1701 bp->b_error = error; 1702 } else { 1703 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1704 - bp->b_dirtyoff; 1705 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1706 + bp->b_dirtyoff; 1707 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1708 uiop->uio_rw = UIO_WRITE; 1709 nfsstats.write_bios++; 1710 bp->b_error = error = nfs_writerpc(vp, uiop, 1711 bp->b_wcred, bp->b_proc); 1712 if (error) { 1713 np->n_error = error; 1714 np->n_flag |= NWRITEERR; 1715 } 1716 bp->b_dirtyoff = bp->b_dirtyend = 0; 1717 } 1718 } 1719 if (error) 1720 bp->b_flags |= B_ERROR; 1721 bp->b_resid = uiop->uio_resid; 1722 biodone(bp); 1723 return (error); 1724 } 1725 1726 /* 1727 * Flush all the blocks associated with a vnode. 1728 * Walk through the buffer pool and push any dirty pages 1729 * associated with the vnode. 1730 */ 1731 /* ARGSUSED */ 1732 nfs_fsync(vp, fflags, cred, waitfor) 1733 register struct vnode *vp; 1734 int fflags; 1735 struct ucred *cred; 1736 int waitfor; 1737 { 1738 register struct nfsnode *np = VTONFS(vp); 1739 int error = 0; 1740 1741 if (np->n_flag & NMODIFIED) { 1742 np->n_flag &= ~NMODIFIED; 1743 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1744 } 1745 if (!error && (np->n_flag & NWRITEERR)) 1746 error = np->n_error; 1747 return (error); 1748 } 1749 1750 /* 1751 * Print out the contents of an nfsnode. 1752 */ 1753 nfs_print(vp) 1754 struct vnode *vp; 1755 { 1756 register struct nfsnode *np = VTONFS(vp); 1757 1758 printf("tag VT_NFS, fileid %d fsid 0x%x", 1759 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1760 #ifdef FIFO 1761 if (vp->v_type == VFIFO) 1762 fifo_printinfo(vp); 1763 #endif /* FIFO */ 1764 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1765 if (np->n_lockholder == 0) 1766 return; 1767 printf("\towner pid %d", np->n_lockholder); 1768 if (np->n_lockwaiter) 1769 printf(" waiting pid %d", np->n_lockwaiter); 1770 printf("\n"); 1771 } 1772