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 7.41 (Berkeley) 05/30/90 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); 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_getattr(vp, vap, cred)) 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 register caddr_t cp; 348 register long t1; 349 caddr_t bpos, dpos; 350 u_long xid; 351 int error = 0; 352 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 353 354 /* First look in the cache.. */ 355 if (nfs_getattrcache(vp, vap) == 0) 356 return (0); 357 nfsstats.rpccnt[NFSPROC_GETATTR]++; 358 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 359 nfsm_fhtom(vp); 360 nfsm_request(vp, NFSPROC_GETATTR, u.u_procp); 361 nfsm_loadattr(vp, vap); 362 nfsm_reqdone; 363 return (error); 364 } 365 366 /* 367 * nfs setattr call. 368 */ 369 nfs_setattr(vp, vap, cred) 370 register struct vnode *vp; 371 register struct vattr *vap; 372 struct ucred *cred; 373 { 374 register struct nfsv2_sattr *sp; 375 register caddr_t cp; 376 register long t1; 377 caddr_t bpos, dpos; 378 u_long xid; 379 int error = 0; 380 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 381 struct nfsnode *np; 382 383 nfsstats.rpccnt[NFSPROC_SETATTR]++; 384 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 385 nfsm_fhtom(vp); 386 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 387 if (vap->va_mode == 0xffff) 388 sp->sa_mode = VNOVAL; 389 else 390 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 391 if (vap->va_uid == 0xffff) 392 sp->sa_uid = VNOVAL; 393 else 394 sp->sa_uid = txdr_unsigned(vap->va_uid); 395 if (vap->va_gid == 0xffff) 396 sp->sa_gid = VNOVAL; 397 else 398 sp->sa_gid = txdr_unsigned(vap->va_gid); 399 sp->sa_size = txdr_unsigned(vap->va_size); 400 if (vap->va_size != VNOVAL) { 401 np = VTONFS(vp); 402 if (np->n_flag & NMODIFIED) { 403 np->n_flag &= ~NMODIFIED; 404 vinvalbuf(vp, TRUE); 405 np->n_attrstamp = 0; 406 } 407 } 408 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 409 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 410 txdr_time(&vap->va_mtime, &sp->sa_mtime); 411 nfsm_request(vp, NFSPROC_SETATTR, u.u_procp); 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_getattr(vdp, &vattr, ndp->ni_cred) && 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); 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); 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); 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); 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); 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); 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); 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); 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); 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 vput(tndp->ni_dvp); 946 if (tndp->ni_vp) 947 vput(tndp->ni_vp); 948 VOP_ABORTOP(sndp); 949 vrele(sndp->ni_dvp); 950 vrele(sndp->ni_vp); 951 /* 952 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 953 */ 954 if (error == ENOENT) 955 error = 0; 956 return (error); 957 } 958 959 /* 960 * nfs file rename rpc called from nfs_remove() above 961 */ 962 nfs_renameit(sndp, tndp) 963 register struct nameidata *sndp, *tndp; 964 { 965 register u_long *p; 966 register caddr_t cp; 967 register long t1, t2; 968 caddr_t bpos, dpos; 969 u_long xid; 970 int error = 0; 971 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 972 973 nfsstats.rpccnt[NFSPROC_RENAME]++; 974 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 975 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 976 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 977 nfsm_fhtom(sndp->ni_dvp); 978 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 979 nfsm_fhtom(tndp->ni_dvp); 980 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 981 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp); 982 nfsm_reqdone; 983 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 984 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 985 return (error); 986 } 987 988 /* 989 * nfs hard link create call 990 */ 991 nfs_link(vp, ndp) 992 register struct vnode *vp; 993 register struct nameidata *ndp; 994 { 995 register u_long *p; 996 register caddr_t cp; 997 register long t1, t2; 998 caddr_t bpos, dpos; 999 u_long xid; 1000 int error = 0; 1001 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1002 1003 if (ndp->ni_dvp != vp) 1004 nfs_lock(vp); 1005 nfsstats.rpccnt[NFSPROC_LINK]++; 1006 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1007 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1008 nfsm_fhtom(vp); 1009 nfsm_fhtom(ndp->ni_dvp); 1010 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1011 nfsm_request(vp, NFSPROC_LINK, u.u_procp); 1012 nfsm_reqdone; 1013 VTONFS(vp)->n_attrstamp = 0; 1014 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1015 if (ndp->ni_dvp != vp) 1016 nfs_unlock(vp); 1017 nfs_nput(ndp->ni_dvp); 1018 /* 1019 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1020 */ 1021 if (error == EEXIST) 1022 error = 0; 1023 return (error); 1024 } 1025 1026 /* 1027 * nfs symbolic link create call 1028 */ 1029 nfs_symlink(ndp, vap, nm) 1030 struct nameidata *ndp; 1031 struct vattr *vap; 1032 char *nm; /* is this the path ?? */ 1033 { 1034 register struct nfsv2_sattr *sp; 1035 register u_long *p; 1036 register caddr_t cp; 1037 register long t1, t2; 1038 caddr_t bpos, dpos; 1039 u_long xid; 1040 int error = 0; 1041 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1042 1043 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1044 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1045 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 1046 nfsm_fhtom(ndp->ni_dvp); 1047 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1048 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1049 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1050 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1051 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1052 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1053 sp->sa_size = txdr_unsigned(VNOVAL); 1054 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1055 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1056 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, u.u_procp); 1057 nfsm_reqdone; 1058 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1059 nfs_nput(ndp->ni_dvp); 1060 /* 1061 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1062 */ 1063 if (error == EEXIST) 1064 error = 0; 1065 return (error); 1066 } 1067 1068 /* 1069 * nfs make dir call 1070 */ 1071 nfs_mkdir(ndp, vap) 1072 register struct nameidata *ndp; 1073 struct vattr *vap; 1074 { 1075 register struct nfsv2_sattr *sp; 1076 register u_long *p; 1077 register caddr_t cp; 1078 register long t1, t2; 1079 register int len; 1080 caddr_t bpos, dpos, cp2; 1081 u_long xid; 1082 int error = 0, firsttry = 1; 1083 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1084 1085 len = ndp->ni_dent.d_namlen; 1086 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1087 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1088 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1089 nfsm_fhtom(ndp->ni_dvp); 1090 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1091 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1092 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1093 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1094 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1095 sp->sa_size = txdr_unsigned(VNOVAL); 1096 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1097 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1098 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, u.u_procp); 1099 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1100 nfsm_reqdone; 1101 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1102 /* 1103 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1104 * if we can succeed in looking up the directory. 1105 * "firsttry" is necessary since the macros may "goto nfsmout" which 1106 * is above the if on errors. (Ugh) 1107 */ 1108 if (error == EEXIST && firsttry) { 1109 firsttry = 0; 1110 error = 0; 1111 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1112 ndp->ni_vp = NULL; 1113 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1114 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1115 nfsm_fhtom(ndp->ni_dvp); 1116 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1117 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp); 1118 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1119 if (ndp->ni_vp->v_type != VDIR) { 1120 vput(ndp->ni_vp); 1121 error = EEXIST; 1122 } 1123 m_freem(mrep); 1124 } 1125 nfs_nput(ndp->ni_dvp); 1126 return (error); 1127 } 1128 1129 /* 1130 * nfs remove directory call 1131 */ 1132 nfs_rmdir(ndp) 1133 register struct nameidata *ndp; 1134 { 1135 register u_long *p; 1136 register caddr_t cp; 1137 register long t1, t2; 1138 caddr_t bpos, dpos; 1139 u_long xid; 1140 int error = 0; 1141 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1142 1143 if (ndp->ni_dvp == ndp->ni_vp) { 1144 vrele(ndp->ni_dvp); 1145 nfs_nput(ndp->ni_dvp); 1146 return (EINVAL); 1147 } 1148 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1149 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1150 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1151 nfsm_fhtom(ndp->ni_dvp); 1152 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1153 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, u.u_procp); 1154 nfsm_reqdone; 1155 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1156 cache_purge(ndp->ni_dvp); 1157 cache_purge(ndp->ni_vp); 1158 nfs_nput(ndp->ni_vp); 1159 nfs_nput(ndp->ni_dvp); 1160 /* 1161 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1162 */ 1163 if (error == ENOENT) 1164 error = 0; 1165 return (error); 1166 } 1167 1168 /* 1169 * nfs readdir call 1170 * Although cookie is defined as opaque, I translate it to/from net byte 1171 * order so that it looks more sensible. This appears consistent with the 1172 * Ultrix implementation of NFS. 1173 */ 1174 nfs_readdir(vp, uiop, cred, eofflagp) 1175 register struct vnode *vp; 1176 struct uio *uiop; 1177 struct ucred *cred; 1178 int *eofflagp; 1179 { 1180 register struct nfsnode *np = VTONFS(vp); 1181 int tresid, error; 1182 struct vattr vattr; 1183 1184 if (vp->v_type != VDIR) 1185 return (EPERM); 1186 /* 1187 * First, check for hit on the EOF offset cache 1188 */ 1189 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1190 (np->n_flag & NMODIFIED) == 0 && 1191 nfs_getattr(vp, &vattr, cred) == 0 && 1192 np->n_mtime == vattr.va_mtime.tv_sec) { 1193 *eofflagp = 1; 1194 nfsstats.direofcache_hits++; 1195 return (0); 1196 } 1197 1198 /* 1199 * Call nfs_bioread() to do the real work. 1200 */ 1201 tresid = uiop->uio_resid; 1202 error = nfs_bioread(vp, uiop, 0, cred); 1203 1204 if (!error && uiop->uio_resid == tresid) { 1205 *eofflagp = 1; 1206 nfsstats.direofcache_misses++; 1207 } else 1208 *eofflagp = 0; 1209 return (error); 1210 } 1211 1212 /* 1213 * Readdir rpc call. 1214 * Called from below the buffer cache by nfs_doio(). 1215 */ 1216 nfs_readdirrpc(vp, uiop, cred, procp) 1217 register struct vnode *vp; 1218 struct uio *uiop; 1219 struct ucred *cred; 1220 struct proc *procp; 1221 { 1222 register long len; 1223 register struct direct *dp; 1224 register u_long *p; 1225 register caddr_t cp; 1226 register long t1; 1227 long tlen, lastlen; 1228 caddr_t bpos, dpos, cp2; 1229 u_long xid; 1230 int error = 0; 1231 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1232 struct mbuf *md2; 1233 caddr_t dpos2; 1234 int siz; 1235 int more_dirs = 1; 1236 off_t off, savoff; 1237 struct direct *savdp; 1238 struct nfsmount *nmp; 1239 struct nfsnode *np = VTONFS(vp); 1240 long tresid; 1241 1242 nmp = VFSTONFS(vp->v_mount); 1243 tresid = uiop->uio_resid; 1244 /* 1245 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1246 * whichever is smaller, truncated to a multiple of DIRBLKSIZ. 1247 * The stopping criteria is EOF or buffer full. 1248 */ 1249 while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) { 1250 nfsstats.rpccnt[NFSPROC_READDIR]++; 1251 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1252 nfsm_fhtom(vp); 1253 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1254 *p++ = txdr_unsigned(uiop->uio_offset); 1255 *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1256 nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1)); 1257 nfsm_request(vp, NFSPROC_READDIR, procp); 1258 siz = 0; 1259 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1260 more_dirs = fxdr_unsigned(int, *p); 1261 1262 /* Save the position so that we can do nfsm_mtouio() later */ 1263 dpos2 = dpos; 1264 md2 = md; 1265 1266 /* loop thru the dir entries, doctoring them to 4bsd form */ 1267 off = uiop->uio_offset; 1268 #ifdef lint 1269 dp = (struct direct *)0; 1270 #endif /* lint */ 1271 while (more_dirs && siz < uiop->uio_resid) { 1272 savoff = off; /* Hold onto offset and dp */ 1273 savdp = dp; 1274 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1275 dp = (struct direct *)p; 1276 dp->d_ino = fxdr_unsigned(u_long, *p++); 1277 len = fxdr_unsigned(int, *p); 1278 if (len <= 0 || len > NFS_MAXNAMLEN) { 1279 error = EBADRPC; 1280 m_freem(mrep); 1281 goto nfsmout; 1282 } 1283 dp->d_namlen = (u_short)len; 1284 nfsm_adv(len); /* Point past name */ 1285 tlen = nfsm_rndup(len); 1286 /* 1287 * This should not be necessary, but some servers have 1288 * broken XDR such that these bytes are not null filled. 1289 */ 1290 if (tlen != len) { 1291 *dpos = '\0'; /* Null-terminate */ 1292 nfsm_adv(tlen - len); 1293 len = tlen; 1294 } 1295 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1296 off = fxdr_unsigned(off_t, *p); 1297 *p++ = 0; /* Ensures null termination of name */ 1298 more_dirs = fxdr_unsigned(int, *p); 1299 dp->d_reclen = len+4*NFSX_UNSIGNED; 1300 siz += dp->d_reclen; 1301 } 1302 /* 1303 * If at end of rpc data, get the eof boolean 1304 */ 1305 if (!more_dirs) { 1306 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1307 more_dirs = (fxdr_unsigned(int, *p) == 0); 1308 1309 /* 1310 * If at EOF, cache directory offset 1311 */ 1312 if (!more_dirs) 1313 np->n_direofoffset = off; 1314 } 1315 /* 1316 * If there is too much to fit in the data buffer, use savoff and 1317 * savdp to trim off the last record. 1318 * --> we are not at eof 1319 */ 1320 if (siz > uiop->uio_resid) { 1321 off = savoff; 1322 siz -= dp->d_reclen; 1323 dp = savdp; 1324 more_dirs = 0; /* Paranoia */ 1325 } 1326 if (siz > 0) { 1327 lastlen = dp->d_reclen; 1328 md = md2; 1329 dpos = dpos2; 1330 nfsm_mtouio(uiop, siz); 1331 uiop->uio_offset = off; 1332 } else 1333 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1334 m_freem(mrep); 1335 } 1336 /* 1337 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 1338 * by increasing d_reclen for the last record. 1339 */ 1340 if (uiop->uio_resid < tresid) { 1341 len = uiop->uio_resid & (DIRBLKSIZ - 1); 1342 if (len > 0) { 1343 dp = (struct direct *) 1344 (uiop->uio_iov->iov_base - lastlen); 1345 dp->d_reclen += len; 1346 uiop->uio_iov->iov_base += len; 1347 uiop->uio_iov->iov_len -= len; 1348 uiop->uio_resid -= len; 1349 } 1350 } 1351 nfsmout: 1352 return (error); 1353 } 1354 1355 static char hextoasc[] = "0123456789abcdef"; 1356 1357 /* 1358 * Silly rename. To make the NFS filesystem that is stateless look a little 1359 * more like the "ufs" a remove of an active vnode is translated to a rename 1360 * to a funny looking filename that is removed by nfs_inactive on the 1361 * nfsnode. There is the potential for another process on a different client 1362 * to create the same funny name between the nfs_lookitup() fails and the 1363 * nfs_rename() completes, but... 1364 */ 1365 nfs_sillyrename(ndp, flag) 1366 register struct nameidata *ndp; 1367 int flag; 1368 { 1369 register struct nfsnode *np; 1370 register struct sillyrename *sp; 1371 register struct nameidata *tndp; 1372 int error; 1373 short pid; 1374 1375 np = VTONFS(ndp->ni_dvp); 1376 cache_purge(ndp->ni_dvp); 1377 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1378 M_TEMP, M_WAITOK); 1379 sp->s_flag = flag; 1380 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1381 np = VTONFS(ndp->ni_vp); 1382 tndp = &sp->s_namei; 1383 tndp->ni_cred = crdup(ndp->ni_cred); 1384 1385 /* Fudge together a funny name */ 1386 pid = u.u_procp->p_pid; 1387 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1388 tndp->ni_dent.d_namlen = 12; 1389 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1390 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1391 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1392 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1393 1394 /* Try lookitups until we get one that isn't there */ 1395 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1396 tndp->ni_dent.d_name[4]++; 1397 if (tndp->ni_dent.d_name[4] > 'z') { 1398 error = EINVAL; 1399 goto bad; 1400 } 1401 } 1402 if (error = nfs_renameit(ndp, tndp)) 1403 goto bad; 1404 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1405 np->n_sillyrename = sp; 1406 return (0); 1407 bad: 1408 crfree(tndp->ni_cred); 1409 free((caddr_t)sp, M_TEMP); 1410 return (error); 1411 } 1412 1413 /* 1414 * Look up a file name for silly rename stuff. 1415 * Just like nfs_lookup() except that it doesn't load returned values 1416 * into the nfsnode table. 1417 * If fhp != NULL it copies the returned file handle out 1418 */ 1419 nfs_lookitup(vp, ndp, fhp) 1420 register struct vnode *vp; 1421 register struct nameidata *ndp; 1422 nfsv2fh_t *fhp; 1423 { 1424 register u_long *p; 1425 register caddr_t cp; 1426 register long t1, t2; 1427 caddr_t bpos, dpos, cp2; 1428 u_long xid; 1429 int error = 0; 1430 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1431 long len; 1432 1433 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1434 ndp->ni_dvp = vp; 1435 ndp->ni_vp = NULL; 1436 len = ndp->ni_dent.d_namlen; 1437 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1438 nfsm_fhtom(vp); 1439 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1440 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp); 1441 if (fhp != NULL) { 1442 nfsm_disect(cp, caddr_t, NFSX_FH); 1443 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1444 } 1445 nfsm_reqdone; 1446 return (error); 1447 } 1448 1449 /* 1450 * Kludge City.. 1451 * - make nfs_bmap() essentially a no-op that does no translation 1452 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1453 * after mapping the physical addresses into Kernel Virtual space in the 1454 * nfsiobuf area. 1455 * (Maybe I could use the process's page mapping, but I was concerned that 1456 * Kernel Write might not be enabled and also figured copyout() would do 1457 * a lot more work than bcopy() and also it currently happens in the 1458 * context of the swapper process (2). 1459 */ 1460 nfs_bmap(vp, bn, vpp, bnp) 1461 struct vnode *vp; 1462 daddr_t bn; 1463 struct vnode **vpp; 1464 daddr_t *bnp; 1465 { 1466 if (vpp != NULL) 1467 *vpp = vp; 1468 if (bnp != NULL) 1469 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1470 return (0); 1471 } 1472 1473 /* 1474 * Strategy routine for phys. i/o 1475 * If the biod's are running, queue a request 1476 * otherwise just call nfs_doio() to get it done 1477 */ 1478 nfs_strategy(bp) 1479 register struct buf *bp; 1480 { 1481 register struct buf *dp; 1482 register int i; 1483 struct proc *rp; 1484 int error = 0; 1485 int fnd = 0; 1486 1487 /* 1488 * Set b_proc. It seems a bit silly to do it here, but since bread() 1489 * doesn't set it, I will. 1490 * Set b_proc == NULL for asynchronous reads, since these may still 1491 * be hanging about after the process terminates. 1492 */ 1493 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) 1494 bp->b_proc = (struct proc *)0; 1495 else 1496 bp->b_proc = u.u_procp; 1497 1498 /* 1499 * If an i/o daemon is waiting 1500 * queue the request, wake it up and wait for completion 1501 * otherwise just do it ourselves 1502 */ 1503 for (i = 0; i < nfs_asyncdaemons; i++) { 1504 if (rp = nfs_iodwant[i]) { 1505 /* 1506 * Ensure that the async_daemon is still waiting here 1507 */ 1508 if (rp->p_stat != SSLEEP || 1509 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1510 nfs_iodwant[i] = (struct proc *)0; 1511 continue; 1512 } 1513 dp = &nfs_bqueue; 1514 if (dp->b_actf == NULL) { 1515 dp->b_actl = bp; 1516 bp->b_actf = dp; 1517 } else { 1518 dp->b_actf->b_actl = bp; 1519 bp->b_actf = dp->b_actf; 1520 } 1521 dp->b_actf = bp; 1522 bp->b_actl = dp; 1523 fnd++; 1524 nfs_iodwant[i] = (struct proc *)0; 1525 wakeup((caddr_t)&nfs_iodwant[i]); 1526 break; 1527 } 1528 } 1529 if (!fnd) 1530 error = nfs_doio(bp); 1531 return (error); 1532 } 1533 1534 /* 1535 * Fun and games with i/o 1536 * Essentially play ubasetup() and disk interrupt service routine by 1537 * mapping the data buffer into kernel virtual space and doing the 1538 * nfs read or write rpc's from it. 1539 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1540 * otherwise it is called by the nfsiods to do what would normally be 1541 * partially disk interrupt driven. 1542 */ 1543 nfs_doio(bp) 1544 register struct buf *bp; 1545 { 1546 register struct uio *uiop; 1547 register struct vnode *vp; 1548 struct nfsnode *np; 1549 struct ucred *cr; 1550 struct proc *rp; 1551 int error; 1552 struct uio uio; 1553 struct iovec io; 1554 #if !defined(hp300) 1555 register struct pte *pte, *ppte; 1556 register caddr_t vaddr; 1557 int npf, npf2; 1558 int reg, o; 1559 caddr_t vbase; 1560 unsigned v; 1561 #endif 1562 1563 vp = bp->b_vp; 1564 np = VTONFS(vp); 1565 uiop = &uio; 1566 uiop->uio_iov = &io; 1567 uiop->uio_iovcnt = 1; 1568 uiop->uio_segflg = UIO_SYSSPACE; 1569 1570 /* 1571 * For phys i/o, map the b_addr into kernel virtual space using 1572 * the Nfsiomap pte's 1573 * Also, add a temporary b_rcred for reading using the process's uid 1574 * and a guess at a group 1575 */ 1576 if (bp->b_flags & B_PHYS) { 1577 bp->b_rcred = cr = crget(); 1578 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1579 cr->cr_uid = rp->p_uid; 1580 cr->cr_gid = 0; /* Anything ?? */ 1581 cr->cr_ngroups = 1; 1582 #if defined(hp300) 1583 /* mapping was already done by vmapbuf */ 1584 io.iov_base = bp->b_un.b_addr; 1585 #else 1586 o = (int)bp->b_un.b_addr & PGOFSET; 1587 npf2 = npf = btoc(bp->b_bcount + o); 1588 1589 /* 1590 * Get some mapping page table entries 1591 */ 1592 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1593 nfsmap_want++; 1594 sleep((caddr_t)&nfsmap_want, PZERO-1); 1595 } 1596 reg--; 1597 if (bp->b_flags & B_PAGET) 1598 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1599 else { 1600 v = btop(bp->b_un.b_addr); 1601 if (bp->b_flags & B_UAREA) 1602 pte = &rp->p_addr[v]; 1603 else 1604 pte = vtopte(rp, v); 1605 } 1606 1607 /* 1608 * Play vmaccess() but with the Nfsiomap page table 1609 */ 1610 ppte = &Nfsiomap[reg]; 1611 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1612 while (npf != 0) { 1613 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1614 #if defined(tahoe) 1615 mtpr(P1DC, vaddr); 1616 #endif 1617 ppte++; 1618 pte++; 1619 vaddr += NBPG; 1620 --npf; 1621 } 1622 io.iov_base = vbase+o; 1623 #endif /* !defined(hp300) */ 1624 1625 /* 1626 * And do the i/o rpc 1627 */ 1628 io.iov_len = uiop->uio_resid = bp->b_bcount; 1629 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1630 if (bp->b_flags & B_READ) { 1631 uiop->uio_rw = UIO_READ; 1632 nfsstats.read_physios++; 1633 bp->b_error = error = nfs_readrpc(vp, uiop, 1634 bp->b_rcred, bp->b_proc); 1635 /* 1636 * If a text file has been modified since it was exec'd 1637 * blow the process' out of the water. This is the 1638 * closest we can come to "Text File Busy" in good old 1639 * stateless nfs. 1640 */ 1641 if ((vp->v_flag & VTEXT) && 1642 (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec)) 1643 xinval(vp); 1644 } else { 1645 uiop->uio_rw = UIO_WRITE; 1646 nfsstats.write_physios++; 1647 bp->b_error = error = nfs_writerpc(vp, uiop, 1648 bp->b_wcred, bp->b_proc); 1649 } 1650 1651 /* 1652 * Finally, release pte's used by physical i/o 1653 */ 1654 crfree(cr); 1655 #if !defined(hp300) 1656 rmfree(nfsmap, (long)npf2, (long)++reg); 1657 if (nfsmap_want) { 1658 nfsmap_want = 0; 1659 wakeup((caddr_t)&nfsmap_want); 1660 } 1661 #endif 1662 } else { 1663 if (bp->b_flags & B_READ) { 1664 io.iov_len = uiop->uio_resid = bp->b_bcount; 1665 io.iov_base = bp->b_un.b_addr; 1666 uiop->uio_rw = UIO_READ; 1667 switch (vp->v_type) { 1668 case VREG: 1669 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1670 nfsstats.read_bios++; 1671 error = nfs_readrpc(vp, uiop, bp->b_rcred, 1672 bp->b_proc); 1673 break; 1674 case VLNK: 1675 uiop->uio_offset = 0; 1676 nfsstats.readlink_bios++; 1677 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred, 1678 bp->b_proc); 1679 break; 1680 case VDIR: 1681 uiop->uio_offset = bp->b_lblkno; 1682 nfsstats.readdir_bios++; 1683 error = nfs_readdirrpc(vp, uiop, bp->b_rcred, 1684 bp->b_proc); 1685 /* 1686 * Save offset cookie in b_blkno. 1687 */ 1688 bp->b_blkno = uiop->uio_offset; 1689 break; 1690 }; 1691 bp->b_error = error; 1692 } else { 1693 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1694 - bp->b_dirtyoff; 1695 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1696 + bp->b_dirtyoff; 1697 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1698 uiop->uio_rw = UIO_WRITE; 1699 nfsstats.write_bios++; 1700 bp->b_error = error = nfs_writerpc(vp, uiop, 1701 bp->b_wcred, bp->b_proc); 1702 if (error) { 1703 np->n_error = error; 1704 np->n_flag |= NWRITEERR; 1705 } 1706 bp->b_dirtyoff = bp->b_dirtyend = 0; 1707 } 1708 } 1709 if (error) 1710 bp->b_flags |= B_ERROR; 1711 bp->b_resid = uiop->uio_resid; 1712 biodone(bp); 1713 return (error); 1714 } 1715 1716 /* 1717 * Flush all the blocks associated with a vnode. 1718 * Walk through the buffer pool and push any dirty pages 1719 * associated with the vnode. 1720 */ 1721 /* ARGSUSED */ 1722 nfs_fsync(vp, fflags, cred, waitfor) 1723 register struct vnode *vp; 1724 int fflags; 1725 struct ucred *cred; 1726 int waitfor; 1727 { 1728 register struct nfsnode *np = VTONFS(vp); 1729 int error = 0; 1730 1731 if (np->n_flag & NMODIFIED) { 1732 np->n_flag &= ~NMODIFIED; 1733 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1734 } 1735 if (!error && (np->n_flag & NWRITEERR)) 1736 error = np->n_error; 1737 return (error); 1738 } 1739 1740 /* 1741 * Print out the contents of an nfsnode. 1742 */ 1743 nfs_print(vp) 1744 struct vnode *vp; 1745 { 1746 register struct nfsnode *np = VTONFS(vp); 1747 1748 printf("tag VT_NFS, fileid %d fsid 0x%x", 1749 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1750 #ifdef FIFO 1751 if (vp->v_type == VFIFO) 1752 fifo_printinfo(vp); 1753 #endif /* FIFO */ 1754 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1755 if (np->n_lockholder == 0) 1756 return; 1757 printf("\towner pid %d", np->n_lockholder); 1758 if (np->n_lockwaiter) 1759 printf(" waiting pid %d", np->n_lockwaiter); 1760 printf("\n"); 1761 } 1762