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 * %sccs.include.redist.c% 9 * 10 * @(#)nfs_vnops.c 7.46 (Berkeley) 07/26/90 11 */ 12 13 /* 14 * vnode op calls for sun nfs version 2 15 */ 16 17 #include "machine/pte.h" 18 #include "machine/mtpr.h" 19 #include "param.h" 20 #include "user.h" 21 #include "proc.h" 22 #include "kernel.h" 23 #include "mount.h" 24 #include "buf.h" 25 #include "vm.h" 26 #include "malloc.h" 27 #include "mbuf.h" 28 #include "errno.h" 29 #include "file.h" 30 #include "conf.h" 31 #include "vnode.h" 32 #include "text.h" 33 #include "map.h" 34 #include "../ufs/quota.h" 35 #include "../ufs/inode.h" 36 #include "nfsv2.h" 37 #include "nfs.h" 38 #include "nfsnode.h" 39 #include "nfsmount.h" 40 #include "xdr_subs.h" 41 #include "nfsm_subs.h" 42 #include "nfsiom.h" 43 44 /* Defs */ 45 #define TRUE 1 46 #define FALSE 0 47 48 /* Global vars */ 49 int nfs_lookup(), 50 nfs_create(), 51 nfs_mknod(), 52 nfs_open(), 53 nfs_close(), 54 nfs_access(), 55 nfs_getattr(), 56 nfs_setattr(), 57 nfs_read(), 58 nfs_write(), 59 vfs_noop(), 60 vfs_nullop(), 61 nfs_remove(), 62 nfs_link(), 63 nfs_rename(), 64 nfs_mkdir(), 65 nfs_rmdir(), 66 nfs_symlink(), 67 nfs_readdir(), 68 nfs_readlink(), 69 nfs_abortop(), 70 nfs_lock(), 71 nfs_unlock(), 72 nfs_bmap(), 73 nfs_strategy(), 74 nfs_fsync(), 75 nfs_inactive(), 76 nfs_reclaim(), 77 nfs_print(), 78 nfs_islocked(); 79 80 struct vnodeops nfsv2_vnodeops = { 81 nfs_lookup, /* lookup */ 82 nfs_create, /* create */ 83 nfs_mknod, /* mknod */ 84 nfs_open, /* open */ 85 nfs_close, /* close */ 86 nfs_access, /* access */ 87 nfs_getattr, /* getattr */ 88 nfs_setattr, /* setattr */ 89 nfs_read, /* read */ 90 nfs_write, /* write */ 91 vfs_noop, /* ioctl */ 92 vfs_noop, /* select */ 93 vfs_noop, /* mmap */ 94 nfs_fsync, /* fsync */ 95 vfs_nullop, /* seek */ 96 nfs_remove, /* remove */ 97 nfs_link, /* link */ 98 nfs_rename, /* rename */ 99 nfs_mkdir, /* mkdir */ 100 nfs_rmdir, /* rmdir */ 101 nfs_symlink, /* symlink */ 102 nfs_readdir, /* readdir */ 103 nfs_readlink, /* readlink */ 104 nfs_abortop, /* abortop */ 105 nfs_inactive, /* inactive */ 106 nfs_reclaim, /* reclaim */ 107 nfs_lock, /* lock */ 108 nfs_unlock, /* unlock */ 109 nfs_bmap, /* bmap */ 110 nfs_strategy, /* strategy */ 111 nfs_print, /* print */ 112 nfs_islocked, /* islocked */ 113 }; 114 115 /* Special device vnode ops */ 116 int spec_lookup(), 117 spec_open(), 118 spec_read(), 119 spec_write(), 120 spec_strategy(), 121 spec_bmap(), 122 spec_ioctl(), 123 spec_select(), 124 spec_close(), 125 spec_badop(), 126 spec_nullop(); 127 128 struct vnodeops spec_nfsv2nodeops = { 129 spec_lookup, /* lookup */ 130 spec_badop, /* create */ 131 spec_badop, /* mknod */ 132 spec_open, /* open */ 133 spec_close, /* close */ 134 nfs_access, /* access */ 135 nfs_getattr, /* getattr */ 136 nfs_setattr, /* setattr */ 137 spec_read, /* read */ 138 spec_write, /* write */ 139 spec_ioctl, /* ioctl */ 140 spec_select, /* select */ 141 spec_badop, /* mmap */ 142 spec_nullop, /* fsync */ 143 spec_badop, /* seek */ 144 spec_badop, /* remove */ 145 spec_badop, /* link */ 146 spec_badop, /* rename */ 147 spec_badop, /* mkdir */ 148 spec_badop, /* rmdir */ 149 spec_badop, /* symlink */ 150 spec_badop, /* readdir */ 151 spec_badop, /* readlink */ 152 spec_badop, /* abortop */ 153 nfs_inactive, /* inactive */ 154 nfs_reclaim, /* reclaim */ 155 nfs_lock, /* lock */ 156 nfs_unlock, /* unlock */ 157 spec_bmap, /* bmap */ 158 spec_strategy, /* strategy */ 159 nfs_print, /* print */ 160 nfs_islocked, /* islocked */ 161 }; 162 163 #ifdef FIFO 164 int fifo_lookup(), 165 fifo_open(), 166 fifo_read(), 167 fifo_write(), 168 fifo_bmap(), 169 fifo_ioctl(), 170 fifo_select(), 171 fifo_close(), 172 fifo_print(), 173 fifo_badop(), 174 fifo_nullop(); 175 176 struct vnodeops fifo_nfsv2nodeops = { 177 fifo_lookup, /* lookup */ 178 fifo_badop, /* create */ 179 fifo_badop, /* mknod */ 180 fifo_open, /* open */ 181 fifo_close, /* close */ 182 nfs_access, /* access */ 183 nfs_getattr, /* getattr */ 184 nfs_setattr, /* setattr */ 185 fifo_read, /* read */ 186 fifo_write, /* write */ 187 fifo_ioctl, /* ioctl */ 188 fifo_select, /* select */ 189 fifo_badop, /* mmap */ 190 fifo_nullop, /* fsync */ 191 fifo_badop, /* seek */ 192 fifo_badop, /* remove */ 193 fifo_badop, /* link */ 194 fifo_badop, /* rename */ 195 fifo_badop, /* mkdir */ 196 fifo_badop, /* rmdir */ 197 fifo_badop, /* symlink */ 198 fifo_badop, /* readdir */ 199 fifo_badop, /* readlink */ 200 fifo_badop, /* abortop */ 201 nfs_inactive, /* inactive */ 202 nfs_reclaim, /* reclaim */ 203 nfs_lock, /* lock */ 204 nfs_unlock, /* unlock */ 205 fifo_bmap, /* bmap */ 206 fifo_badop, /* strategy */ 207 nfs_print, /* print */ 208 nfs_islocked, /* islocked */ 209 }; 210 #endif /* FIFO */ 211 212 extern u_long nfs_procids[NFS_NPROCS]; 213 extern u_long nfs_prog, nfs_vers; 214 extern char nfsiobuf[MAXPHYS+NBPG]; 215 struct map nfsmap[NFS_MSIZ]; 216 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 217 int nfs_asyncdaemons = 0; 218 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 219 static int nfsmap_want = 0; 220 221 /* 222 * nfs null call from vfs. 223 */ 224 nfs_null(vp, cred) 225 struct vnode *vp; 226 struct ucred *cred; 227 { 228 caddr_t bpos, dpos; 229 u_long xid; 230 int error = 0; 231 struct mbuf *mreq, *mrep, *md, *mb; 232 233 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 234 nfsm_request(vp, NFSPROC_NULL, u.u_procp, 0); 235 nfsm_reqdone; 236 return (error); 237 } 238 239 /* 240 * nfs access vnode op. 241 * Essentially just get vattr and then imitate iaccess() 242 */ 243 nfs_access(vp, mode, cred) 244 struct vnode *vp; 245 int mode; 246 register struct ucred *cred; 247 { 248 register struct vattr *vap; 249 register gid_t *gp; 250 struct vattr vattr; 251 register int i; 252 int error; 253 254 /* 255 * If you're the super-user, 256 * you always get access. 257 */ 258 if (cred->cr_uid == 0) 259 return (0); 260 vap = &vattr; 261 if (error = nfs_dogetattr(vp, vap, cred, 0)) 262 return (error); 263 /* 264 * Access check is based on only one of owner, group, public. 265 * If not owner, then check group. If not a member of the 266 * group, then check public access. 267 */ 268 if (cred->cr_uid != vap->va_uid) { 269 mode >>= 3; 270 gp = cred->cr_groups; 271 for (i = 0; i < cred->cr_ngroups; i++, gp++) 272 if (vap->va_gid == *gp) 273 goto found; 274 mode >>= 3; 275 found: 276 ; 277 } 278 if ((vap->va_mode & mode) != 0) 279 return (0); 280 return (EACCES); 281 } 282 283 /* 284 * nfs open vnode op 285 * Just check to see if the type is ok 286 */ 287 /* ARGSUSED */ 288 nfs_open(vp, mode, cred) 289 struct vnode *vp; 290 int mode; 291 struct ucred *cred; 292 { 293 register enum vtype vtyp; 294 295 vtyp = vp->v_type; 296 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 297 return (0); 298 else 299 return (EACCES); 300 } 301 302 /* 303 * nfs close vnode op 304 * For reg files, invalidate any buffer cache entries. 305 */ 306 /* ARGSUSED */ 307 nfs_close(vp, fflags, cred) 308 register struct vnode *vp; 309 int fflags; 310 struct ucred *cred; 311 { 312 register struct nfsnode *np = VTONFS(vp); 313 int error = 0; 314 315 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 316 nfs_lock(vp); 317 np->n_flag &= ~NMODIFIED; 318 vinvalbuf(vp, TRUE); 319 np->n_attrstamp = 0; 320 if (np->n_flag & NWRITEERR) { 321 np->n_flag &= ~NWRITEERR; 322 error = np->n_error; 323 } 324 nfs_unlock(vp); 325 } 326 return (error); 327 } 328 329 /* 330 * nfs getattr call from vfs. 331 */ 332 nfs_getattr(vp, vap, cred) 333 register struct vnode *vp; 334 struct vattr *vap; 335 struct ucred *cred; 336 { 337 return (nfs_dogetattr(vp, vap, cred, 0)); 338 } 339 340 nfs_dogetattr(vp, vap, cred, tryhard) 341 register struct vnode *vp; 342 struct vattr *vap; 343 struct ucred *cred; 344 int tryhard; 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, NFSPROC_GETATTR, u.u_procp, tryhard); 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 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 400 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 401 txdr_time(&vap->va_mtime, &sp->sa_mtime); 402 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 403 vap->va_atime.tv_sec != VNOVAL) { 404 np = VTONFS(vp); 405 if (np->n_flag & NMODIFIED) { 406 np->n_flag &= ~NMODIFIED; 407 vinvalbuf(vp, TRUE); 408 np->n_attrstamp = 0; 409 } 410 } 411 nfsm_request(vp, NFSPROC_SETATTR, u.u_procp, 1); 412 nfsm_loadattr(vp, (struct vattr *)0); 413 /* should we fill in any vap fields ?? */ 414 nfsm_reqdone; 415 return (error); 416 } 417 418 /* 419 * nfs lookup call, one step at a time... 420 * First look in cache 421 * If not found, unlock the directory nfsnode and do the rpc 422 */ 423 nfs_lookup(vp, ndp) 424 register struct vnode *vp; 425 register struct nameidata *ndp; 426 { 427 register struct vnode *vdp; 428 register u_long *p; 429 register caddr_t cp; 430 register long t1, t2; 431 caddr_t bpos, dpos, cp2; 432 u_long xid; 433 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 434 struct vnode *newvp; 435 long len; 436 nfsv2fh_t *fhp; 437 struct nfsnode *np; 438 int lockparent, wantparent, flag, error = 0; 439 440 ndp->ni_dvp = vp; 441 ndp->ni_vp = NULL; 442 if (vp->v_type != VDIR) 443 return (ENOTDIR); 444 lockparent = ndp->ni_nameiop & LOCKPARENT; 445 flag = ndp->ni_nameiop & OPFLAG; 446 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 447 if ((error = cache_lookup(ndp)) && error != ENOENT) { 448 struct vattr vattr; 449 int vpid; 450 451 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 452 panic("nfs_lookup: .. through root"); 453 vdp = ndp->ni_vp; 454 vpid = vdp->v_id; 455 /* 456 * See the comment starting `Step through' in ufs/ufs_lookup.c 457 * for an explanation of the locking protocol 458 */ 459 if (vp == vdp) { 460 VREF(vdp); 461 error = 0; 462 } else if (ndp->ni_isdotdot) { 463 nfs_unlock(vp); 464 error = vget(vdp); 465 } else { 466 error = vget(vdp); 467 nfs_unlock(vp); 468 } 469 if (!error) { 470 if (vpid == vdp->v_id) { 471 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0) && 472 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 473 nfsstats.lookupcache_hits++; 474 return (0); 475 } else { 476 cache_purge(vdp); 477 nfs_nput(vdp); 478 } 479 } else { 480 nfs_nput(vdp); 481 } 482 } 483 ndp->ni_vp = NULLVP; 484 } else 485 nfs_unlock(vp); 486 error = 0; 487 nfsstats.lookupcache_misses++; 488 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 489 len = ndp->ni_namelen; 490 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 491 nfsm_fhtom(vp); 492 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 493 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 0); 494 nfsmout: 495 if (error) { 496 if (lockparent || (flag != CREATE && flag != RENAME) || 497 *ndp->ni_next != 0) 498 nfs_lock(vp); 499 return (error); 500 } 501 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 502 503 /* 504 * Handle DELETE and RENAME cases... 505 */ 506 if (flag == DELETE && *ndp->ni_next == 0) { 507 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 508 VREF(vp); 509 newvp = vp; 510 np = VTONFS(vp); 511 } else { 512 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 513 nfs_lock(vp); 514 m_freem(mrep); 515 return (error); 516 } 517 newvp = NFSTOV(np); 518 } 519 if (error = 520 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 521 nfs_lock(vp); 522 if (newvp != vp) 523 nfs_nput(newvp); 524 else 525 vrele(vp); 526 m_freem(mrep); 527 return (error); 528 } 529 ndp->ni_vp = newvp; 530 if (lockparent || vp == newvp) 531 nfs_lock(vp); 532 m_freem(mrep); 533 return (0); 534 } 535 536 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 537 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 538 nfs_lock(vp); 539 m_freem(mrep); 540 return (EISDIR); 541 } 542 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 543 nfs_lock(vp); 544 m_freem(mrep); 545 return (error); 546 } 547 newvp = NFSTOV(np); 548 if (error = 549 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 550 nfs_lock(vp); 551 nfs_nput(newvp); 552 m_freem(mrep); 553 return (error); 554 } 555 ndp->ni_vp = newvp; 556 if (lockparent) 557 nfs_lock(vp); 558 return (0); 559 } 560 561 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 562 VREF(vp); 563 newvp = vp; 564 np = VTONFS(vp); 565 } else if (ndp->ni_isdotdot) { 566 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 567 nfs_lock(vp); 568 m_freem(mrep); 569 return (error); 570 } 571 newvp = NFSTOV(np); 572 } else { 573 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 574 nfs_lock(vp); 575 m_freem(mrep); 576 return (error); 577 } 578 newvp = NFSTOV(np); 579 } 580 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 581 nfs_lock(vp); 582 if (newvp != vp) 583 nfs_nput(newvp); 584 else 585 vrele(vp); 586 m_freem(mrep); 587 return (error); 588 } 589 m_freem(mrep); 590 591 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 592 nfs_lock(vp); 593 ndp->ni_vp = newvp; 594 if (error == 0 && ndp->ni_makeentry) { 595 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 596 cache_enter(ndp); 597 } 598 return (error); 599 } 600 601 /* 602 * nfs read call. 603 * Just call nfs_bioread() to do the work. 604 */ 605 nfs_read(vp, uiop, ioflag, cred) 606 register struct vnode *vp; 607 struct uio *uiop; 608 int ioflag; 609 struct ucred *cred; 610 { 611 if (vp->v_type != VREG) 612 return (EPERM); 613 return (nfs_bioread(vp, uiop, ioflag, cred)); 614 } 615 616 /* 617 * nfs readlink call 618 */ 619 nfs_readlink(vp, uiop, cred) 620 struct vnode *vp; 621 struct uio *uiop; 622 struct ucred *cred; 623 { 624 if (vp->v_type != VLNK) 625 return (EPERM); 626 return (nfs_bioread(vp, uiop, 0, cred)); 627 } 628 629 /* 630 * Do a readlink rpc. 631 * Called by nfs_doio() from below the buffer cache. 632 */ 633 nfs_readlinkrpc(vp, uiop, cred, procp) 634 register struct vnode *vp; 635 struct uio *uiop; 636 struct ucred *cred; 637 struct proc *procp; 638 { 639 register u_long *p; 640 register caddr_t cp; 641 register long t1; 642 caddr_t bpos, dpos, cp2; 643 u_long xid; 644 int error = 0; 645 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 646 long len; 647 648 nfsstats.rpccnt[NFSPROC_READLINK]++; 649 nfs_unlock(vp); 650 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 651 nfsm_fhtom(vp); 652 nfsm_request(vp, NFSPROC_READLINK, procp, 0); 653 nfsm_strsiz(len, NFS_MAXPATHLEN); 654 nfsm_mtouio(uiop, len); 655 nfsm_reqdone; 656 nfs_lock(vp); 657 return (error); 658 } 659 660 /* 661 * nfs read rpc call 662 * Ditto above 663 */ 664 nfs_readrpc(vp, uiop, cred, procp) 665 register struct vnode *vp; 666 struct uio *uiop; 667 struct ucred *cred; 668 struct proc *procp; 669 { 670 register u_long *p; 671 register caddr_t cp; 672 register long t1; 673 caddr_t bpos, dpos, cp2; 674 u_long xid; 675 int error = 0; 676 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 677 struct nfsmount *nmp; 678 long len, retlen, tsiz; 679 680 nmp = VFSTONFS(vp->v_mount); 681 tsiz = uiop->uio_resid; 682 while (tsiz > 0) { 683 nfsstats.rpccnt[NFSPROC_READ]++; 684 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 685 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 686 nfsm_fhtom(vp); 687 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 688 *p++ = txdr_unsigned(uiop->uio_offset); 689 *p++ = txdr_unsigned(len); 690 *p = 0; 691 nfsm_request(vp, NFSPROC_READ, procp, 1); 692 nfsm_loadattr(vp, (struct vattr *)0); 693 nfsm_strsiz(retlen, nmp->nm_rsize); 694 nfsm_mtouio(uiop, retlen); 695 m_freem(mrep); 696 if (retlen < len) 697 tsiz = 0; 698 else 699 tsiz -= len; 700 } 701 nfsmout: 702 return (error); 703 } 704 705 /* 706 * nfs write call 707 */ 708 nfs_writerpc(vp, uiop, cred, procp) 709 register struct vnode *vp; 710 struct uio *uiop; 711 struct ucred *cred; 712 struct proc *procp; 713 { 714 register u_long *p; 715 register caddr_t cp; 716 register long t1; 717 caddr_t bpos, dpos; 718 u_long xid; 719 int error = 0; 720 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 721 struct nfsmount *nmp; 722 long len, tsiz; 723 724 nmp = VFSTONFS(vp->v_mount); 725 tsiz = uiop->uio_resid; 726 while (tsiz > 0) { 727 nfsstats.rpccnt[NFSPROC_WRITE]++; 728 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 729 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 730 NFSX_FH+NFSX_UNSIGNED*4); 731 nfsm_fhtom(vp); 732 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 733 *(p+1) = txdr_unsigned(uiop->uio_offset); 734 *(p+3) = txdr_unsigned(len); 735 nfsm_uiotom(uiop, len); 736 nfsm_request(vp, NFSPROC_WRITE, procp, 1); 737 nfsm_loadattr(vp, (struct vattr *)0); 738 m_freem(mrep); 739 tsiz -= len; 740 } 741 nfsmout: 742 return (error); 743 } 744 745 /* 746 * nfs mknod call 747 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 748 * set to specify the file type and the size field for rdev. 749 */ 750 /* ARGSUSED */ 751 nfs_mknod(ndp, vap, cred) 752 struct nameidata *ndp; 753 struct ucred *cred; 754 register struct vattr *vap; 755 { 756 register struct nfsv2_sattr *sp; 757 register u_long *p; 758 register caddr_t cp; 759 register long t1, t2; 760 caddr_t bpos, dpos; 761 u_long xid; 762 int error = 0; 763 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 764 u_long rdev; 765 766 if (vap->va_type == VCHR || vap->va_type == VBLK) 767 rdev = txdr_unsigned(vap->va_rdev); 768 #ifdef FIFO 769 else if (vap->va_type == VFIFO) 770 rdev = 0xffffffff; 771 #endif /* FIFO */ 772 else { 773 VOP_ABORTOP(ndp); 774 vput(ndp->ni_dvp); 775 return (EOPNOTSUPP); 776 } 777 nfsstats.rpccnt[NFSPROC_CREATE]++; 778 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 779 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 780 nfsm_fhtom(ndp->ni_dvp); 781 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 782 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 783 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 784 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 785 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 786 sp->sa_size = rdev; 787 /* or should these be VNOVAL ?? */ 788 txdr_time(&vap->va_atime, &sp->sa_atime); 789 txdr_time(&vap->va_mtime, &sp->sa_mtime); 790 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 791 nfsm_reqdone; 792 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 793 nfs_nput(ndp->ni_dvp); 794 return (error); 795 } 796 797 /* 798 * nfs file create call 799 */ 800 nfs_create(ndp, vap) 801 register struct nameidata *ndp; 802 register struct vattr *vap; 803 { 804 register struct nfsv2_sattr *sp; 805 register u_long *p; 806 register caddr_t cp; 807 register long t1, t2; 808 caddr_t bpos, dpos, cp2; 809 u_long xid; 810 int error = 0; 811 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 812 813 nfsstats.rpccnt[NFSPROC_CREATE]++; 814 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 815 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 816 nfsm_fhtom(ndp->ni_dvp); 817 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 818 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 819 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 820 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 821 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 822 sp->sa_size = txdr_unsigned(0); 823 /* or should these be VNOVAL ?? */ 824 txdr_time(&vap->va_atime, &sp->sa_atime); 825 txdr_time(&vap->va_mtime, &sp->sa_mtime); 826 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 827 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 828 nfsm_reqdone; 829 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 830 nfs_nput(ndp->ni_dvp); 831 return (error); 832 } 833 834 /* 835 * nfs file remove call 836 * To try and make nfs semantics closer to ufs semantics, a file that has 837 * other processes using the vnode is renamed instead of removed and then 838 * removed later on the last close. 839 * - If v_usecount > 1 840 * If a rename is not already in the works 841 * call nfs_sillyrename() to set it up 842 * else 843 * do the remove rpc 844 */ 845 nfs_remove(ndp) 846 register struct nameidata *ndp; 847 { 848 register struct vnode *vp = ndp->ni_vp; 849 register struct nfsnode *np = VTONFS(ndp->ni_vp); 850 register u_long *p; 851 register caddr_t cp; 852 register long t1, t2; 853 caddr_t bpos, dpos; 854 u_long xid; 855 int error = 0; 856 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 857 858 if (vp->v_usecount > 1) { 859 if (!np->n_sillyrename) 860 error = nfs_sillyrename(ndp, REMOVE); 861 } else { 862 nfsstats.rpccnt[NFSPROC_REMOVE]++; 863 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 864 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 865 nfsm_fhtom(ndp->ni_dvp); 866 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 867 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 868 nfsm_reqdone; 869 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 870 /* 871 * Kludge City: If the first reply to the remove rpc is lost.. 872 * the reply to the retransmitted request will be ENOENT 873 * since the file was in fact removed 874 * Therefore, we cheat and return success. 875 */ 876 if (error == ENOENT) 877 error = 0; 878 } 879 np->n_attrstamp = 0; 880 if (ndp->ni_dvp == vp) 881 vrele(vp); 882 else 883 nfs_nput(ndp->ni_dvp); 884 nfs_nput(vp); 885 return (error); 886 } 887 888 /* 889 * nfs file remove rpc called from nfs_inactive 890 */ 891 nfs_removeit(ndp) 892 register struct nameidata *ndp; 893 { 894 register u_long *p; 895 register caddr_t cp; 896 register long t1, t2; 897 caddr_t bpos, dpos; 898 u_long xid; 899 int error = 0; 900 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 901 902 nfsstats.rpccnt[NFSPROC_REMOVE]++; 903 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 904 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 905 nfsm_fhtom(ndp->ni_dvp); 906 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 907 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 908 nfsm_reqdone; 909 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 910 return (error); 911 } 912 913 /* 914 * nfs file rename call 915 */ 916 nfs_rename(sndp, tndp) 917 register struct nameidata *sndp, *tndp; 918 { 919 register u_long *p; 920 register caddr_t cp; 921 register long t1, t2; 922 caddr_t bpos, dpos; 923 u_long xid; 924 int error = 0; 925 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 926 927 nfsstats.rpccnt[NFSPROC_RENAME]++; 928 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 929 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 930 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 931 nfsm_fhtom(sndp->ni_dvp); 932 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 933 nfsm_fhtom(tndp->ni_dvp); 934 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 935 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 936 nfsm_reqdone; 937 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 938 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 939 if (sndp->ni_vp->v_type == VDIR) { 940 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 941 cache_purge(tndp->ni_dvp); 942 cache_purge(sndp->ni_dvp); 943 } 944 VOP_ABORTOP(tndp); 945 if (tndp->ni_dvp == tndp->ni_vp) 946 vrele(tndp->ni_dvp); 947 else 948 vput(tndp->ni_dvp); 949 if (tndp->ni_vp) 950 vput(tndp->ni_vp); 951 VOP_ABORTOP(sndp); 952 vrele(sndp->ni_dvp); 953 vrele(sndp->ni_vp); 954 /* 955 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 956 */ 957 if (error == ENOENT) 958 error = 0; 959 return (error); 960 } 961 962 /* 963 * nfs file rename rpc called from nfs_remove() above 964 */ 965 nfs_renameit(sndp, tndp) 966 register struct nameidata *sndp, *tndp; 967 { 968 register u_long *p; 969 register caddr_t cp; 970 register long t1, t2; 971 caddr_t bpos, dpos; 972 u_long xid; 973 int error = 0; 974 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 975 976 nfsstats.rpccnt[NFSPROC_RENAME]++; 977 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 978 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 979 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 980 nfsm_fhtom(sndp->ni_dvp); 981 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 982 nfsm_fhtom(tndp->ni_dvp); 983 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 984 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 985 nfsm_reqdone; 986 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 987 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 988 return (error); 989 } 990 991 /* 992 * nfs hard link create call 993 */ 994 nfs_link(vp, ndp) 995 register struct vnode *vp; 996 register struct nameidata *ndp; 997 { 998 register u_long *p; 999 register caddr_t cp; 1000 register long t1, t2; 1001 caddr_t bpos, dpos; 1002 u_long xid; 1003 int error = 0; 1004 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1005 1006 if (ndp->ni_dvp != vp) 1007 nfs_lock(vp); 1008 nfsstats.rpccnt[NFSPROC_LINK]++; 1009 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1010 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1011 nfsm_fhtom(vp); 1012 nfsm_fhtom(ndp->ni_dvp); 1013 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1014 nfsm_request(vp, NFSPROC_LINK, u.u_procp, 1); 1015 nfsm_reqdone; 1016 VTONFS(vp)->n_attrstamp = 0; 1017 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1018 if (ndp->ni_dvp != vp) 1019 nfs_unlock(vp); 1020 nfs_nput(ndp->ni_dvp); 1021 /* 1022 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1023 */ 1024 if (error == EEXIST) 1025 error = 0; 1026 return (error); 1027 } 1028 1029 /* 1030 * nfs symbolic link create call 1031 */ 1032 nfs_symlink(ndp, vap, nm) 1033 struct nameidata *ndp; 1034 struct vattr *vap; 1035 char *nm; /* is this the path ?? */ 1036 { 1037 register struct nfsv2_sattr *sp; 1038 register u_long *p; 1039 register caddr_t cp; 1040 register long t1, t2; 1041 caddr_t bpos, dpos; 1042 u_long xid; 1043 int error = 0; 1044 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1045 1046 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1047 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1048 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 1049 nfsm_fhtom(ndp->ni_dvp); 1050 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1051 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1052 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1053 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1054 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1055 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1056 sp->sa_size = txdr_unsigned(VNOVAL); 1057 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1058 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1059 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, u.u_procp, 1); 1060 nfsm_reqdone; 1061 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1062 nfs_nput(ndp->ni_dvp); 1063 /* 1064 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1065 */ 1066 if (error == EEXIST) 1067 error = 0; 1068 return (error); 1069 } 1070 1071 /* 1072 * nfs make dir call 1073 */ 1074 nfs_mkdir(ndp, vap) 1075 register struct nameidata *ndp; 1076 struct vattr *vap; 1077 { 1078 register struct nfsv2_sattr *sp; 1079 register u_long *p; 1080 register caddr_t cp; 1081 register long t1, t2; 1082 register int len; 1083 caddr_t bpos, dpos, cp2; 1084 u_long xid; 1085 int error = 0, firsttry = 1; 1086 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1087 1088 len = ndp->ni_dent.d_namlen; 1089 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1090 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1091 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1092 nfsm_fhtom(ndp->ni_dvp); 1093 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1094 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1095 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1096 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1097 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1098 sp->sa_size = txdr_unsigned(VNOVAL); 1099 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1100 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1101 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, u.u_procp, 1); 1102 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1103 nfsm_reqdone; 1104 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1105 /* 1106 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1107 * if we can succeed in looking up the directory. 1108 * "firsttry" is necessary since the macros may "goto nfsmout" which 1109 * is above the if on errors. (Ugh) 1110 */ 1111 if (error == EEXIST && firsttry) { 1112 firsttry = 0; 1113 error = 0; 1114 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1115 ndp->ni_vp = NULL; 1116 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1117 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1118 nfsm_fhtom(ndp->ni_dvp); 1119 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1120 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp, 1); 1121 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1122 if (ndp->ni_vp->v_type != VDIR) { 1123 vput(ndp->ni_vp); 1124 error = EEXIST; 1125 } 1126 m_freem(mrep); 1127 } 1128 nfs_nput(ndp->ni_dvp); 1129 return (error); 1130 } 1131 1132 /* 1133 * nfs remove directory call 1134 */ 1135 nfs_rmdir(ndp) 1136 register struct nameidata *ndp; 1137 { 1138 register u_long *p; 1139 register caddr_t cp; 1140 register long t1, t2; 1141 caddr_t bpos, dpos; 1142 u_long xid; 1143 int error = 0; 1144 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1145 1146 if (ndp->ni_dvp == ndp->ni_vp) { 1147 vrele(ndp->ni_dvp); 1148 nfs_nput(ndp->ni_dvp); 1149 return (EINVAL); 1150 } 1151 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1152 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1153 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1154 nfsm_fhtom(ndp->ni_dvp); 1155 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1156 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, u.u_procp, 1); 1157 nfsm_reqdone; 1158 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1159 cache_purge(ndp->ni_dvp); 1160 cache_purge(ndp->ni_vp); 1161 nfs_nput(ndp->ni_vp); 1162 nfs_nput(ndp->ni_dvp); 1163 /* 1164 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1165 */ 1166 if (error == ENOENT) 1167 error = 0; 1168 return (error); 1169 } 1170 1171 /* 1172 * nfs readdir call 1173 * Although cookie is defined as opaque, I translate it to/from net byte 1174 * order so that it looks more sensible. This appears consistent with the 1175 * Ultrix implementation of NFS. 1176 */ 1177 nfs_readdir(vp, uiop, cred, eofflagp) 1178 register struct vnode *vp; 1179 struct uio *uiop; 1180 struct ucred *cred; 1181 int *eofflagp; 1182 { 1183 register struct nfsnode *np = VTONFS(vp); 1184 int tresid, error; 1185 struct vattr vattr; 1186 1187 if (vp->v_type != VDIR) 1188 return (EPERM); 1189 /* 1190 * First, check for hit on the EOF offset cache 1191 */ 1192 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1193 (np->n_flag & NMODIFIED) == 0 && 1194 nfs_dogetattr(vp, &vattr, cred, 0) == 0 && 1195 np->n_mtime == vattr.va_mtime.tv_sec) { 1196 *eofflagp = 1; 1197 nfsstats.direofcache_hits++; 1198 return (0); 1199 } 1200 1201 /* 1202 * Call nfs_bioread() to do the real work. 1203 */ 1204 tresid = uiop->uio_resid; 1205 error = nfs_bioread(vp, uiop, 0, cred); 1206 1207 if (!error && uiop->uio_resid == tresid) { 1208 *eofflagp = 1; 1209 nfsstats.direofcache_misses++; 1210 } else 1211 *eofflagp = 0; 1212 return (error); 1213 } 1214 1215 /* 1216 * Readdir rpc call. 1217 * Called from below the buffer cache by nfs_doio(). 1218 */ 1219 nfs_readdirrpc(vp, uiop, cred, procp) 1220 register struct vnode *vp; 1221 struct uio *uiop; 1222 struct ucred *cred; 1223 struct proc *procp; 1224 { 1225 register long len; 1226 register struct direct *dp; 1227 register u_long *p; 1228 register caddr_t cp; 1229 register long t1; 1230 long tlen, lastlen; 1231 caddr_t bpos, dpos, cp2; 1232 u_long xid; 1233 int error = 0; 1234 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1235 struct mbuf *md2; 1236 caddr_t dpos2; 1237 int siz; 1238 int more_dirs = 1; 1239 off_t off, savoff; 1240 struct direct *savdp; 1241 struct nfsmount *nmp; 1242 struct nfsnode *np = VTONFS(vp); 1243 long tresid; 1244 1245 nmp = VFSTONFS(vp->v_mount); 1246 tresid = uiop->uio_resid; 1247 /* 1248 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1249 * whichever is smaller, truncated to a multiple of DIRBLKSIZ. 1250 * The stopping criteria is EOF or buffer full. 1251 */ 1252 while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) { 1253 nfsstats.rpccnt[NFSPROC_READDIR]++; 1254 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1255 nfsm_fhtom(vp); 1256 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1257 *p++ = txdr_unsigned(uiop->uio_offset); 1258 *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1259 nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1)); 1260 nfsm_request(vp, NFSPROC_READDIR, procp, 0); 1261 siz = 0; 1262 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1263 more_dirs = fxdr_unsigned(int, *p); 1264 1265 /* Save the position so that we can do nfsm_mtouio() later */ 1266 dpos2 = dpos; 1267 md2 = md; 1268 1269 /* loop thru the dir entries, doctoring them to 4bsd form */ 1270 off = uiop->uio_offset; 1271 #ifdef lint 1272 dp = (struct direct *)0; 1273 #endif /* lint */ 1274 while (more_dirs && siz < uiop->uio_resid) { 1275 savoff = off; /* Hold onto offset and dp */ 1276 savdp = dp; 1277 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1278 dp = (struct direct *)p; 1279 dp->d_ino = fxdr_unsigned(u_long, *p++); 1280 len = fxdr_unsigned(int, *p); 1281 if (len <= 0 || len > NFS_MAXNAMLEN) { 1282 error = EBADRPC; 1283 m_freem(mrep); 1284 goto nfsmout; 1285 } 1286 dp->d_namlen = (u_short)len; 1287 nfsm_adv(len); /* Point past name */ 1288 tlen = nfsm_rndup(len); 1289 /* 1290 * This should not be necessary, but some servers have 1291 * broken XDR such that these bytes are not null filled. 1292 */ 1293 if (tlen != len) { 1294 *dpos = '\0'; /* Null-terminate */ 1295 nfsm_adv(tlen - len); 1296 len = tlen; 1297 } 1298 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1299 off = fxdr_unsigned(off_t, *p); 1300 *p++ = 0; /* Ensures null termination of name */ 1301 more_dirs = fxdr_unsigned(int, *p); 1302 dp->d_reclen = len+4*NFSX_UNSIGNED; 1303 siz += dp->d_reclen; 1304 } 1305 /* 1306 * If at end of rpc data, get the eof boolean 1307 */ 1308 if (!more_dirs) { 1309 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1310 more_dirs = (fxdr_unsigned(int, *p) == 0); 1311 1312 /* 1313 * If at EOF, cache directory offset 1314 */ 1315 if (!more_dirs) 1316 np->n_direofoffset = off; 1317 } 1318 /* 1319 * If there is too much to fit in the data buffer, use savoff and 1320 * savdp to trim off the last record. 1321 * --> we are not at eof 1322 */ 1323 if (siz > uiop->uio_resid) { 1324 off = savoff; 1325 siz -= dp->d_reclen; 1326 dp = savdp; 1327 more_dirs = 0; /* Paranoia */ 1328 } 1329 if (siz > 0) { 1330 lastlen = dp->d_reclen; 1331 md = md2; 1332 dpos = dpos2; 1333 nfsm_mtouio(uiop, siz); 1334 uiop->uio_offset = off; 1335 } else 1336 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1337 m_freem(mrep); 1338 } 1339 /* 1340 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 1341 * by increasing d_reclen for the last record. 1342 */ 1343 if (uiop->uio_resid < tresid) { 1344 len = uiop->uio_resid & (DIRBLKSIZ - 1); 1345 if (len > 0) { 1346 dp = (struct direct *) 1347 (uiop->uio_iov->iov_base - lastlen); 1348 dp->d_reclen += len; 1349 uiop->uio_iov->iov_base += len; 1350 uiop->uio_iov->iov_len -= len; 1351 uiop->uio_resid -= len; 1352 } 1353 } 1354 nfsmout: 1355 return (error); 1356 } 1357 1358 static char hextoasc[] = "0123456789abcdef"; 1359 1360 /* 1361 * Silly rename. To make the NFS filesystem that is stateless look a little 1362 * more like the "ufs" a remove of an active vnode is translated to a rename 1363 * to a funny looking filename that is removed by nfs_inactive on the 1364 * nfsnode. There is the potential for another process on a different client 1365 * to create the same funny name between the nfs_lookitup() fails and the 1366 * nfs_rename() completes, but... 1367 */ 1368 nfs_sillyrename(ndp, flag) 1369 register struct nameidata *ndp; 1370 int flag; 1371 { 1372 register struct nfsnode *np; 1373 register struct sillyrename *sp; 1374 register struct nameidata *tndp; 1375 int error; 1376 short pid; 1377 1378 np = VTONFS(ndp->ni_dvp); 1379 cache_purge(ndp->ni_dvp); 1380 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1381 M_TEMP, M_WAITOK); 1382 sp->s_flag = flag; 1383 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1384 np = VTONFS(ndp->ni_vp); 1385 tndp = &sp->s_namei; 1386 tndp->ni_cred = crdup(ndp->ni_cred); 1387 1388 /* Fudge together a funny name */ 1389 pid = u.u_procp->p_pid; 1390 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1391 tndp->ni_dent.d_namlen = 12; 1392 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1393 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1394 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1395 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1396 1397 /* Try lookitups until we get one that isn't there */ 1398 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1399 tndp->ni_dent.d_name[4]++; 1400 if (tndp->ni_dent.d_name[4] > 'z') { 1401 error = EINVAL; 1402 goto bad; 1403 } 1404 } 1405 if (error = nfs_renameit(ndp, tndp)) 1406 goto bad; 1407 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1408 np->n_sillyrename = sp; 1409 return (0); 1410 bad: 1411 crfree(tndp->ni_cred); 1412 free((caddr_t)sp, M_TEMP); 1413 return (error); 1414 } 1415 1416 /* 1417 * Look up a file name for silly rename stuff. 1418 * Just like nfs_lookup() except that it doesn't load returned values 1419 * into the nfsnode table. 1420 * If fhp != NULL it copies the returned file handle out 1421 */ 1422 nfs_lookitup(vp, ndp, fhp) 1423 register struct vnode *vp; 1424 register struct nameidata *ndp; 1425 nfsv2fh_t *fhp; 1426 { 1427 register u_long *p; 1428 register caddr_t cp; 1429 register long t1, t2; 1430 caddr_t bpos, dpos, cp2; 1431 u_long xid; 1432 int error = 0; 1433 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1434 long len; 1435 1436 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1437 ndp->ni_dvp = vp; 1438 ndp->ni_vp = NULL; 1439 len = ndp->ni_dent.d_namlen; 1440 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1441 nfsm_fhtom(vp); 1442 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1443 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 1); 1444 if (fhp != NULL) { 1445 nfsm_disect(cp, caddr_t, NFSX_FH); 1446 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1447 } 1448 nfsm_reqdone; 1449 return (error); 1450 } 1451 1452 /* 1453 * Kludge City.. 1454 * - make nfs_bmap() essentially a no-op that does no translation 1455 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1456 * after mapping the physical addresses into Kernel Virtual space in the 1457 * nfsiobuf area. 1458 * (Maybe I could use the process's page mapping, but I was concerned that 1459 * Kernel Write might not be enabled and also figured copyout() would do 1460 * a lot more work than bcopy() and also it currently happens in the 1461 * context of the swapper process (2). 1462 */ 1463 nfs_bmap(vp, bn, vpp, bnp) 1464 struct vnode *vp; 1465 daddr_t bn; 1466 struct vnode **vpp; 1467 daddr_t *bnp; 1468 { 1469 if (vpp != NULL) 1470 *vpp = vp; 1471 if (bnp != NULL) 1472 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1473 return (0); 1474 } 1475 1476 /* 1477 * Strategy routine for phys. i/o 1478 * If the biod's are running, queue a request 1479 * otherwise just call nfs_doio() to get it done 1480 */ 1481 nfs_strategy(bp) 1482 register struct buf *bp; 1483 { 1484 register struct buf *dp; 1485 register int i; 1486 struct proc *rp; 1487 int error = 0; 1488 int fnd = 0; 1489 1490 /* 1491 * Set b_proc. It seems a bit silly to do it here, but since bread() 1492 * doesn't set it, I will. 1493 * Set b_proc == NULL for asynchronous reads, since these may still 1494 * be hanging about after the process terminates. 1495 */ 1496 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) 1497 bp->b_proc = (struct proc *)0; 1498 else 1499 bp->b_proc = u.u_procp; 1500 1501 /* 1502 * If an i/o daemon is waiting 1503 * queue the request, wake it up and wait for completion 1504 * otherwise just do it ourselves 1505 */ 1506 for (i = 0; i < nfs_asyncdaemons; i++) { 1507 if (rp = nfs_iodwant[i]) { 1508 /* 1509 * Ensure that the async_daemon is still waiting here 1510 */ 1511 if (rp->p_stat != SSLEEP || 1512 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1513 nfs_iodwant[i] = (struct proc *)0; 1514 continue; 1515 } 1516 dp = &nfs_bqueue; 1517 if (dp->b_actf == NULL) { 1518 dp->b_actl = bp; 1519 bp->b_actf = dp; 1520 } else { 1521 dp->b_actf->b_actl = bp; 1522 bp->b_actf = dp->b_actf; 1523 } 1524 dp->b_actf = bp; 1525 bp->b_actl = dp; 1526 fnd++; 1527 nfs_iodwant[i] = (struct proc *)0; 1528 wakeup((caddr_t)&nfs_iodwant[i]); 1529 break; 1530 } 1531 } 1532 if (!fnd) 1533 error = nfs_doio(bp); 1534 return (error); 1535 } 1536 1537 /* 1538 * Fun and games with i/o 1539 * Essentially play ubasetup() and disk interrupt service routine by 1540 * mapping the data buffer into kernel virtual space and doing the 1541 * nfs read or write rpc's from it. 1542 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1543 * otherwise it is called by the nfsiods to do what would normally be 1544 * partially disk interrupt driven. 1545 */ 1546 nfs_doio(bp) 1547 register struct buf *bp; 1548 { 1549 register struct uio *uiop; 1550 register struct vnode *vp; 1551 struct nfsnode *np; 1552 struct ucred *cr; 1553 struct proc *rp; 1554 int error; 1555 struct uio uio; 1556 struct iovec io; 1557 #if !defined(hp300) && !defined(i386) 1558 register struct pte *pte, *ppte; 1559 register caddr_t vaddr; 1560 int npf, npf2; 1561 int reg, o; 1562 caddr_t vbase; 1563 unsigned v; 1564 #endif 1565 1566 vp = bp->b_vp; 1567 np = VTONFS(vp); 1568 uiop = &uio; 1569 uiop->uio_iov = &io; 1570 uiop->uio_iovcnt = 1; 1571 uiop->uio_segflg = UIO_SYSSPACE; 1572 1573 /* 1574 * For phys i/o, map the b_addr into kernel virtual space using 1575 * the Nfsiomap pte's 1576 * Also, add a temporary b_rcred for reading using the process's uid 1577 * and a guess at a group 1578 */ 1579 if (bp->b_flags & B_PHYS) { 1580 bp->b_rcred = cr = crget(); 1581 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1582 cr->cr_uid = rp->p_uid; 1583 cr->cr_gid = 0; /* Anything ?? */ 1584 cr->cr_ngroups = 1; 1585 #if defined(hp300) || defined(i386) 1586 /* mapping was already done by vmapbuf */ 1587 io.iov_base = bp->b_un.b_addr; 1588 #else 1589 o = (int)bp->b_un.b_addr & PGOFSET; 1590 npf2 = npf = btoc(bp->b_bcount + o); 1591 1592 /* 1593 * Get some mapping page table entries 1594 */ 1595 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1596 nfsmap_want++; 1597 (void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap", 1598 0); 1599 } 1600 reg--; 1601 if (bp->b_flags & B_PAGET) 1602 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1603 else { 1604 v = btop(bp->b_un.b_addr); 1605 if (bp->b_flags & B_UAREA) 1606 pte = &rp->p_addr[v]; 1607 else 1608 pte = vtopte(rp, v); 1609 } 1610 1611 /* 1612 * Play vmaccess() but with the Nfsiomap page table 1613 */ 1614 ppte = &Nfsiomap[reg]; 1615 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1616 while (npf != 0) { 1617 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1618 #if defined(tahoe) 1619 mtpr(P1DC, vaddr); 1620 #endif 1621 ppte++; 1622 pte++; 1623 vaddr += NBPG; 1624 --npf; 1625 } 1626 io.iov_base = vbase+o; 1627 #endif /* !defined(hp300) */ 1628 1629 /* 1630 * And do the i/o rpc 1631 */ 1632 io.iov_len = uiop->uio_resid = bp->b_bcount; 1633 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1634 if (bp->b_flags & B_READ) { 1635 uiop->uio_rw = UIO_READ; 1636 nfsstats.read_physios++; 1637 bp->b_error = error = nfs_readrpc(vp, uiop, 1638 bp->b_rcred, bp->b_proc); 1639 /* 1640 * If a text file has been modified since it was exec'd 1641 * blow the process' out of the water. This is the 1642 * closest we can come to "Text File Busy" in good old 1643 * stateless nfs. 1644 */ 1645 if ((vp->v_flag & VTEXT) && 1646 (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec)) 1647 xinval(vp); 1648 } else { 1649 uiop->uio_rw = UIO_WRITE; 1650 nfsstats.write_physios++; 1651 bp->b_error = error = nfs_writerpc(vp, uiop, 1652 bp->b_wcred, bp->b_proc); 1653 } 1654 1655 /* 1656 * Finally, release pte's used by physical i/o 1657 */ 1658 crfree(cr); 1659 #if !defined(hp300) && !defined(i386) 1660 rmfree(nfsmap, (long)npf2, (long)++reg); 1661 if (nfsmap_want) { 1662 nfsmap_want = 0; 1663 wakeup((caddr_t)&nfsmap_want); 1664 } 1665 #endif 1666 } else { 1667 if (bp->b_flags & B_READ) { 1668 io.iov_len = uiop->uio_resid = bp->b_bcount; 1669 io.iov_base = bp->b_un.b_addr; 1670 uiop->uio_rw = UIO_READ; 1671 switch (vp->v_type) { 1672 case VREG: 1673 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1674 nfsstats.read_bios++; 1675 error = nfs_readrpc(vp, uiop, bp->b_rcred, 1676 bp->b_proc); 1677 break; 1678 case VLNK: 1679 uiop->uio_offset = 0; 1680 nfsstats.readlink_bios++; 1681 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred, 1682 bp->b_proc); 1683 break; 1684 case VDIR: 1685 uiop->uio_offset = bp->b_lblkno; 1686 nfsstats.readdir_bios++; 1687 error = nfs_readdirrpc(vp, uiop, bp->b_rcred, 1688 bp->b_proc); 1689 /* 1690 * Save offset cookie in b_blkno. 1691 */ 1692 bp->b_blkno = uiop->uio_offset; 1693 break; 1694 }; 1695 bp->b_error = error; 1696 } else { 1697 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1698 - bp->b_dirtyoff; 1699 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1700 + bp->b_dirtyoff; 1701 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1702 uiop->uio_rw = UIO_WRITE; 1703 nfsstats.write_bios++; 1704 bp->b_error = error = nfs_writerpc(vp, uiop, 1705 bp->b_wcred, bp->b_proc); 1706 if (error) { 1707 np->n_error = error; 1708 np->n_flag |= NWRITEERR; 1709 } 1710 bp->b_dirtyoff = bp->b_dirtyend = 0; 1711 } 1712 } 1713 if (error) 1714 bp->b_flags |= B_ERROR; 1715 bp->b_resid = uiop->uio_resid; 1716 biodone(bp); 1717 return (error); 1718 } 1719 1720 /* 1721 * Flush all the blocks associated with a vnode. 1722 * Walk through the buffer pool and push any dirty pages 1723 * associated with the vnode. 1724 */ 1725 /* ARGSUSED */ 1726 nfs_fsync(vp, fflags, cred, waitfor) 1727 register struct vnode *vp; 1728 int fflags; 1729 struct ucred *cred; 1730 int waitfor; 1731 { 1732 register struct nfsnode *np = VTONFS(vp); 1733 int error = 0; 1734 1735 if (np->n_flag & NMODIFIED) { 1736 np->n_flag &= ~NMODIFIED; 1737 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1738 } 1739 if (!error && (np->n_flag & NWRITEERR)) 1740 error = np->n_error; 1741 return (error); 1742 } 1743 1744 /* 1745 * Print out the contents of an nfsnode. 1746 */ 1747 nfs_print(vp) 1748 struct vnode *vp; 1749 { 1750 register struct nfsnode *np = VTONFS(vp); 1751 1752 printf("tag VT_NFS, fileid %d fsid 0x%x", 1753 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1754 #ifdef FIFO 1755 if (vp->v_type == VFIFO) 1756 fifo_printinfo(vp); 1757 #endif /* FIFO */ 1758 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1759 if (np->n_lockholder == 0) 1760 return; 1761 printf("\towner pid %d", np->n_lockholder); 1762 if (np->n_lockwaiter) 1763 printf(" waiting pid %d", np->n_lockwaiter); 1764 printf("\n"); 1765 } 1766