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 7.54 (Berkeley) 03/04/91 11 */ 12 13 /* 14 * vnode op calls for sun nfs version 2 15 */ 16 17 #include "machine/mtpr.h" 18 #include "param.h" 19 #include "user.h" 20 #include "proc.h" 21 #include "kernel.h" 22 #include "systm.h" 23 #include "mount.h" 24 #include "buf.h" 25 #include "malloc.h" 26 #include "mbuf.h" 27 #include "errno.h" 28 #include "file.h" 29 #include "conf.h" 30 #include "vnode.h" 31 #include "map.h" 32 #include "../ufs/quota.h" 33 #include "../ufs/inode.h" 34 #include "nfsv2.h" 35 #include "nfs.h" 36 #include "nfsnode.h" 37 #include "nfsmount.h" 38 #include "xdr_subs.h" 39 #include "nfsm_subs.h" 40 #include "nfsiom.h" 41 42 /* Defs */ 43 #define TRUE 1 44 #define FALSE 0 45 46 /* Global vars */ 47 int nfs_lookup(), 48 nfs_create(), 49 nfs_mknod(), 50 nfs_open(), 51 nfs_close(), 52 nfs_access(), 53 nfs_getattr(), 54 nfs_setattr(), 55 nfs_read(), 56 nfs_write(), 57 nfs_remove(), 58 nfs_link(), 59 nfs_rename(), 60 nfs_mkdir(), 61 nfs_rmdir(), 62 nfs_symlink(), 63 nfs_readdir(), 64 nfs_readlink(), 65 nfs_abortop(), 66 nfs_lock(), 67 nfs_unlock(), 68 nfs_bmap(), 69 nfs_strategy(), 70 nfs_fsync(), 71 nfs_inactive(), 72 nfs_reclaim(), 73 nfs_print(), 74 nfs_islocked(), 75 nfs_advlock(), 76 eopnotsupp(), 77 seltrue(); 78 79 struct vnodeops nfsv2_vnodeops = { 80 nfs_lookup, /* lookup */ 81 nfs_create, /* create */ 82 nfs_mknod, /* mknod */ 83 nfs_open, /* open */ 84 nfs_close, /* close */ 85 nfs_access, /* access */ 86 nfs_getattr, /* getattr */ 87 nfs_setattr, /* setattr */ 88 nfs_read, /* read */ 89 nfs_write, /* write */ 90 eopnotsupp, /* ioctl */ 91 seltrue, /* select */ 92 eopnotsupp, /* mmap */ 93 nfs_fsync, /* fsync */ 94 nullop, /* seek */ 95 nfs_remove, /* remove */ 96 nfs_link, /* link */ 97 nfs_rename, /* rename */ 98 nfs_mkdir, /* mkdir */ 99 nfs_rmdir, /* rmdir */ 100 nfs_symlink, /* symlink */ 101 nfs_readdir, /* readdir */ 102 nfs_readlink, /* readlink */ 103 nfs_abortop, /* abortop */ 104 nfs_inactive, /* inactive */ 105 nfs_reclaim, /* reclaim */ 106 nfs_lock, /* lock */ 107 nfs_unlock, /* unlock */ 108 nfs_bmap, /* bmap */ 109 nfs_strategy, /* strategy */ 110 nfs_print, /* print */ 111 nfs_islocked, /* islocked */ 112 nfs_advlock, /* advlock */ 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_advlock(); 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 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 spec_advlock, /* advlock */ 162 }; 163 164 #ifdef FIFO 165 int fifo_lookup(), 166 fifo_open(), 167 fifo_read(), 168 fifo_write(), 169 fifo_bmap(), 170 fifo_ioctl(), 171 fifo_select(), 172 fifo_close(), 173 fifo_print(), 174 fifo_badop(), 175 fifo_advlock(); 176 177 struct vnodeops fifo_nfsv2nodeops = { 178 fifo_lookup, /* lookup */ 179 fifo_badop, /* create */ 180 fifo_badop, /* mknod */ 181 fifo_open, /* open */ 182 fifo_close, /* close */ 183 nfs_access, /* access */ 184 nfs_getattr, /* getattr */ 185 nfs_setattr, /* setattr */ 186 fifo_read, /* read */ 187 fifo_write, /* write */ 188 fifo_ioctl, /* ioctl */ 189 fifo_select, /* select */ 190 fifo_badop, /* mmap */ 191 nullop, /* fsync */ 192 fifo_badop, /* seek */ 193 fifo_badop, /* remove */ 194 fifo_badop, /* link */ 195 fifo_badop, /* rename */ 196 fifo_badop, /* mkdir */ 197 fifo_badop, /* rmdir */ 198 fifo_badop, /* symlink */ 199 fifo_badop, /* readdir */ 200 fifo_badop, /* readlink */ 201 fifo_badop, /* abortop */ 202 nfs_inactive, /* inactive */ 203 nfs_reclaim, /* reclaim */ 204 nfs_lock, /* lock */ 205 nfs_unlock, /* unlock */ 206 fifo_bmap, /* bmap */ 207 fifo_badop, /* strategy */ 208 nfs_print, /* print */ 209 nfs_islocked, /* islocked */ 210 fifo_advlock, /* advlock */ 211 }; 212 #endif /* FIFO */ 213 214 extern u_long nfs_procids[NFS_NPROCS]; 215 extern u_long nfs_prog, nfs_vers; 216 extern char nfsiobuf[MAXPHYS+NBPG]; 217 struct map nfsmap[NFS_MSIZ]; 218 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 219 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 220 int nfs_numasync = 0; 221 static int nfsmap_want = 0; 222 223 /* 224 * nfs null call from vfs. 225 */ 226 nfs_null(vp, cred) 227 struct vnode *vp; 228 struct ucred *cred; 229 { 230 caddr_t bpos, dpos; 231 u_long xid; 232 int error = 0; 233 struct mbuf *mreq, *mrep, *md, *mb; 234 235 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 236 nfsm_request(vp, NFSPROC_NULL, u.u_procp, 0); 237 nfsm_reqdone; 238 return (error); 239 } 240 241 /* 242 * nfs access vnode op. 243 * Essentially just get vattr and then imitate iaccess() 244 */ 245 nfs_access(vp, mode, cred) 246 struct vnode *vp; 247 int mode; 248 register struct ucred *cred; 249 { 250 register struct vattr *vap; 251 register gid_t *gp; 252 struct vattr vattr; 253 register int i; 254 int error; 255 256 /* 257 * If you're the super-user, 258 * you always get access. 259 */ 260 if (cred->cr_uid == 0) 261 return (0); 262 vap = &vattr; 263 if (error = nfs_dogetattr(vp, vap, cred, 0)) 264 return (error); 265 /* 266 * Access check is based on only one of owner, group, public. 267 * If not owner, then check group. If not a member of the 268 * group, then check public access. 269 */ 270 if (cred->cr_uid != vap->va_uid) { 271 mode >>= 3; 272 gp = cred->cr_groups; 273 for (i = 0; i < cred->cr_ngroups; i++, gp++) 274 if (vap->va_gid == *gp) 275 goto found; 276 mode >>= 3; 277 found: 278 ; 279 } 280 if ((vap->va_mode & mode) != 0) 281 return (0); 282 return (EACCES); 283 } 284 285 /* 286 * nfs open vnode op 287 * Just check to see if the type is ok 288 */ 289 /* ARGSUSED */ 290 nfs_open(vp, mode, cred) 291 struct vnode *vp; 292 int mode; 293 struct ucred *cred; 294 { 295 register enum vtype vtyp; 296 297 vtyp = vp->v_type; 298 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 299 return (0); 300 else 301 return (EACCES); 302 } 303 304 /* 305 * nfs close vnode op 306 * For reg files, invalidate any buffer cache entries. 307 */ 308 /* ARGSUSED */ 309 nfs_close(vp, fflags, cred) 310 register struct vnode *vp; 311 int fflags; 312 struct ucred *cred; 313 { 314 register struct nfsnode *np = VTONFS(vp); 315 int error = 0; 316 317 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 318 nfs_lock(vp); 319 np->n_flag &= ~NMODIFIED; 320 vinvalbuf(vp, TRUE); 321 np->n_attrstamp = 0; 322 if (np->n_flag & NWRITEERR) { 323 np->n_flag &= ~NWRITEERR; 324 error = np->n_error; 325 } 326 nfs_unlock(vp); 327 } 328 return (error); 329 } 330 331 /* 332 * nfs getattr call from vfs. 333 */ 334 nfs_getattr(vp, vap, cred) 335 register struct vnode *vp; 336 struct vattr *vap; 337 struct ucred *cred; 338 { 339 return (nfs_dogetattr(vp, vap, cred, 0)); 340 } 341 342 nfs_dogetattr(vp, vap, cred, tryhard) 343 register struct vnode *vp; 344 struct vattr *vap; 345 struct ucred *cred; 346 int tryhard; 347 { 348 register caddr_t cp; 349 register long t1; 350 caddr_t bpos, dpos; 351 u_long xid; 352 int error = 0; 353 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 354 355 /* First look in the cache.. */ 356 if (nfs_getattrcache(vp, vap) == 0) 357 return (0); 358 nfsstats.rpccnt[NFSPROC_GETATTR]++; 359 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 360 nfsm_fhtom(vp); 361 nfsm_request(vp, NFSPROC_GETATTR, u.u_procp, tryhard); 362 nfsm_loadattr(vp, vap); 363 nfsm_reqdone; 364 return (error); 365 } 366 367 /* 368 * nfs setattr call. 369 */ 370 nfs_setattr(vp, vap, cred) 371 register struct vnode *vp; 372 register struct vattr *vap; 373 struct ucred *cred; 374 { 375 register struct nfsv2_sattr *sp; 376 register caddr_t cp; 377 register long t1; 378 caddr_t bpos, dpos; 379 u_long xid; 380 int error = 0; 381 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 382 struct nfsnode *np; 383 384 nfsstats.rpccnt[NFSPROC_SETATTR]++; 385 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 386 nfsm_fhtom(vp); 387 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 388 if (vap->va_mode == 0xffff) 389 sp->sa_mode = VNOVAL; 390 else 391 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 392 if (vap->va_uid == 0xffff) 393 sp->sa_uid = VNOVAL; 394 else 395 sp->sa_uid = txdr_unsigned(vap->va_uid); 396 if (vap->va_gid == 0xffff) 397 sp->sa_gid = VNOVAL; 398 else 399 sp->sa_gid = txdr_unsigned(vap->va_gid); 400 sp->sa_size = txdr_unsigned(vap->va_size); 401 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 402 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 403 txdr_time(&vap->va_mtime, &sp->sa_mtime); 404 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 405 vap->va_atime.tv_sec != VNOVAL) { 406 np = VTONFS(vp); 407 if (np->n_flag & NMODIFIED) { 408 np->n_flag &= ~NMODIFIED; 409 if (vap->va_size == 0) 410 vinvalbuf(vp, FALSE); 411 else 412 vinvalbuf(vp, TRUE); 413 np->n_attrstamp = 0; 414 } 415 } 416 nfsm_request(vp, NFSPROC_SETATTR, u.u_procp, 1); 417 nfsm_loadattr(vp, (struct vattr *)0); 418 /* should we fill in any vap fields ?? */ 419 nfsm_reqdone; 420 return (error); 421 } 422 423 /* 424 * nfs lookup call, one step at a time... 425 * First look in cache 426 * If not found, unlock the directory nfsnode and do the rpc 427 */ 428 nfs_lookup(vp, ndp) 429 register struct vnode *vp; 430 register struct nameidata *ndp; 431 { 432 register struct vnode *vdp; 433 register u_long *p; 434 register caddr_t cp; 435 register long t1, t2; 436 caddr_t bpos, dpos, cp2; 437 u_long xid; 438 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 439 struct vnode *newvp; 440 long len; 441 nfsv2fh_t *fhp; 442 struct nfsnode *np; 443 int lockparent, wantparent, flag, error = 0; 444 445 ndp->ni_dvp = vp; 446 ndp->ni_vp = NULL; 447 if (vp->v_type != VDIR) 448 return (ENOTDIR); 449 lockparent = ndp->ni_nameiop & LOCKPARENT; 450 flag = ndp->ni_nameiop & OPMASK; 451 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 452 if ((error = cache_lookup(ndp)) && error != ENOENT) { 453 struct vattr vattr; 454 int vpid; 455 456 #ifdef PARANOID 457 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 458 panic("nfs_lookup: .. through root"); 459 #endif 460 vdp = ndp->ni_vp; 461 vpid = vdp->v_id; 462 /* 463 * See the comment starting `Step through' in ufs/ufs_lookup.c 464 * for an explanation of the locking protocol 465 */ 466 if (vp == vdp) { 467 VREF(vdp); 468 error = 0; 469 } else if (ndp->ni_isdotdot) { 470 nfs_unlock(vp); 471 error = vget(vdp); 472 } else { 473 error = vget(vdp); 474 nfs_unlock(vp); 475 } 476 if (!error) { 477 if (vpid == vdp->v_id) { 478 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0) && 479 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 480 nfsstats.lookupcache_hits++; 481 return (0); 482 } else { 483 cache_purge(vdp); 484 nfs_nput(vdp); 485 } 486 } else { 487 nfs_nput(vdp); 488 } 489 } 490 ndp->ni_vp = NULLVP; 491 } else 492 nfs_unlock(vp); 493 error = 0; 494 nfsstats.lookupcache_misses++; 495 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 496 len = ndp->ni_namelen; 497 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 498 nfsm_fhtom(vp); 499 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 500 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 0); 501 nfsmout: 502 if (error) { 503 if (lockparent || (flag != CREATE && flag != RENAME) || 504 *ndp->ni_next != 0) 505 nfs_lock(vp); 506 return (error); 507 } 508 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 509 510 /* 511 * Handle DELETE and RENAME cases... 512 */ 513 if (flag == DELETE && *ndp->ni_next == 0) { 514 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 515 VREF(vp); 516 newvp = vp; 517 np = VTONFS(vp); 518 } else { 519 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 520 nfs_lock(vp); 521 m_freem(mrep); 522 return (error); 523 } 524 newvp = NFSTOV(np); 525 } 526 if (error = 527 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 528 nfs_lock(vp); 529 if (newvp != vp) 530 nfs_nput(newvp); 531 else 532 vrele(vp); 533 m_freem(mrep); 534 return (error); 535 } 536 ndp->ni_vp = newvp; 537 if (lockparent || vp == newvp) 538 nfs_lock(vp); 539 m_freem(mrep); 540 return (0); 541 } 542 543 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 544 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 545 nfs_lock(vp); 546 m_freem(mrep); 547 return (EISDIR); 548 } 549 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 550 nfs_lock(vp); 551 m_freem(mrep); 552 return (error); 553 } 554 newvp = NFSTOV(np); 555 if (error = 556 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 557 nfs_lock(vp); 558 nfs_nput(newvp); 559 m_freem(mrep); 560 return (error); 561 } 562 ndp->ni_vp = newvp; 563 if (lockparent) 564 nfs_lock(vp); 565 m_freem(mrep); 566 return (0); 567 } 568 569 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 570 VREF(vp); 571 newvp = vp; 572 np = VTONFS(vp); 573 } else if (ndp->ni_isdotdot) { 574 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 575 nfs_lock(vp); 576 m_freem(mrep); 577 return (error); 578 } 579 newvp = NFSTOV(np); 580 } else { 581 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 582 nfs_lock(vp); 583 m_freem(mrep); 584 return (error); 585 } 586 newvp = NFSTOV(np); 587 } 588 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 589 nfs_lock(vp); 590 if (newvp != vp) 591 nfs_nput(newvp); 592 else 593 vrele(vp); 594 m_freem(mrep); 595 return (error); 596 } 597 m_freem(mrep); 598 599 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 600 nfs_lock(vp); 601 ndp->ni_vp = newvp; 602 if (error == 0 && ndp->ni_makeentry) { 603 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 604 cache_enter(ndp); 605 } 606 return (error); 607 } 608 609 /* 610 * nfs read call. 611 * Just call nfs_bioread() to do the work. 612 */ 613 nfs_read(vp, uiop, ioflag, cred) 614 register struct vnode *vp; 615 struct uio *uiop; 616 int ioflag; 617 struct ucred *cred; 618 { 619 if (vp->v_type != VREG) 620 return (EPERM); 621 return (nfs_bioread(vp, uiop, ioflag, cred)); 622 } 623 624 /* 625 * nfs readlink call 626 */ 627 nfs_readlink(vp, uiop, cred) 628 struct vnode *vp; 629 struct uio *uiop; 630 struct ucred *cred; 631 { 632 if (vp->v_type != VLNK) 633 return (EPERM); 634 return (nfs_bioread(vp, uiop, 0, cred)); 635 } 636 637 /* 638 * Do a readlink rpc. 639 * Called by nfs_doio() from below the buffer cache. 640 */ 641 nfs_readlinkrpc(vp, uiop, cred, procp) 642 register struct vnode *vp; 643 struct uio *uiop; 644 struct ucred *cred; 645 struct proc *procp; 646 { 647 register u_long *p; 648 register caddr_t cp; 649 register long t1; 650 caddr_t bpos, dpos, cp2; 651 u_long xid; 652 int error = 0; 653 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 654 long len; 655 656 nfsstats.rpccnt[NFSPROC_READLINK]++; 657 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 658 nfsm_fhtom(vp); 659 nfsm_request(vp, NFSPROC_READLINK, procp, 0); 660 nfsm_strsiz(len, NFS_MAXPATHLEN); 661 nfsm_mtouio(uiop, len); 662 nfsm_reqdone; 663 return (error); 664 } 665 666 /* 667 * nfs read rpc call 668 * Ditto above 669 */ 670 nfs_readrpc(vp, uiop, cred, procp) 671 register struct vnode *vp; 672 struct uio *uiop; 673 struct ucred *cred; 674 struct proc *procp; 675 { 676 register u_long *p; 677 register caddr_t cp; 678 register long t1; 679 caddr_t bpos, dpos, cp2; 680 u_long xid; 681 int error = 0; 682 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 683 struct nfsmount *nmp; 684 long len, retlen, tsiz; 685 686 nmp = VFSTONFS(vp->v_mount); 687 tsiz = uiop->uio_resid; 688 while (tsiz > 0) { 689 nfsstats.rpccnt[NFSPROC_READ]++; 690 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 691 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 692 nfsm_fhtom(vp); 693 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 694 *p++ = txdr_unsigned(uiop->uio_offset); 695 *p++ = txdr_unsigned(len); 696 *p = 0; 697 nfsm_request(vp, NFSPROC_READ, procp, 1); 698 nfsm_loadattr(vp, (struct vattr *)0); 699 nfsm_strsiz(retlen, nmp->nm_rsize); 700 nfsm_mtouio(uiop, retlen); 701 m_freem(mrep); 702 if (retlen < len) 703 tsiz = 0; 704 else 705 tsiz -= len; 706 } 707 nfsmout: 708 return (error); 709 } 710 711 /* 712 * nfs write call 713 */ 714 nfs_writerpc(vp, uiop, cred, procp) 715 register struct vnode *vp; 716 struct uio *uiop; 717 struct ucred *cred; 718 struct proc *procp; 719 { 720 register u_long *p; 721 register caddr_t cp; 722 register long t1; 723 caddr_t bpos, dpos; 724 u_long xid; 725 int error = 0; 726 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 727 struct nfsmount *nmp; 728 long len, tsiz; 729 730 nmp = VFSTONFS(vp->v_mount); 731 tsiz = uiop->uio_resid; 732 while (tsiz > 0) { 733 nfsstats.rpccnt[NFSPROC_WRITE]++; 734 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 735 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 736 NFSX_FH+NFSX_UNSIGNED*4); 737 nfsm_fhtom(vp); 738 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 739 *(p+1) = txdr_unsigned(uiop->uio_offset); 740 *(p+3) = txdr_unsigned(len); 741 nfsm_uiotom(uiop, len); 742 nfsm_request(vp, NFSPROC_WRITE, procp, 1); 743 nfsm_loadattr(vp, (struct vattr *)0); 744 m_freem(mrep); 745 tsiz -= len; 746 } 747 nfsmout: 748 return (error); 749 } 750 751 /* 752 * nfs mknod call 753 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 754 * set to specify the file type and the size field for rdev. 755 */ 756 /* ARGSUSED */ 757 nfs_mknod(ndp, vap, cred) 758 struct nameidata *ndp; 759 struct ucred *cred; 760 register struct vattr *vap; 761 { 762 register struct nfsv2_sattr *sp; 763 register u_long *p; 764 register caddr_t cp; 765 register long t1, t2; 766 caddr_t bpos, dpos; 767 u_long xid; 768 int error = 0; 769 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 770 u_long rdev; 771 772 if (vap->va_type == VCHR || vap->va_type == VBLK) 773 rdev = txdr_unsigned(vap->va_rdev); 774 #ifdef FIFO 775 else if (vap->va_type == VFIFO) 776 rdev = 0xffffffff; 777 #endif /* FIFO */ 778 else { 779 VOP_ABORTOP(ndp); 780 vput(ndp->ni_dvp); 781 return (EOPNOTSUPP); 782 } 783 nfsstats.rpccnt[NFSPROC_CREATE]++; 784 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 785 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 786 nfsm_fhtom(ndp->ni_dvp); 787 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 788 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 789 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 790 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 791 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 792 sp->sa_size = rdev; 793 /* or should these be VNOVAL ?? */ 794 txdr_time(&vap->va_atime, &sp->sa_atime); 795 txdr_time(&vap->va_mtime, &sp->sa_mtime); 796 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 797 nfsm_reqdone; 798 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 799 nfs_nput(ndp->ni_dvp); 800 return (error); 801 } 802 803 /* 804 * nfs file create call 805 */ 806 nfs_create(ndp, vap) 807 register struct nameidata *ndp; 808 register struct vattr *vap; 809 { 810 register struct nfsv2_sattr *sp; 811 register u_long *p; 812 register caddr_t cp; 813 register long t1, t2; 814 caddr_t bpos, dpos, cp2; 815 u_long xid; 816 int error = 0; 817 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 818 819 nfsstats.rpccnt[NFSPROC_CREATE]++; 820 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 821 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 822 nfsm_fhtom(ndp->ni_dvp); 823 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 824 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 825 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 826 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 827 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 828 sp->sa_size = txdr_unsigned(0); 829 /* or should these be VNOVAL ?? */ 830 txdr_time(&vap->va_atime, &sp->sa_atime); 831 txdr_time(&vap->va_mtime, &sp->sa_mtime); 832 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1); 833 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 834 nfsm_reqdone; 835 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 836 nfs_nput(ndp->ni_dvp); 837 return (error); 838 } 839 840 /* 841 * nfs file remove call 842 * To try and make nfs semantics closer to ufs semantics, a file that has 843 * other processes using the vnode is renamed instead of removed and then 844 * removed later on the last close. 845 * - If v_usecount > 1 846 * If a rename is not already in the works 847 * call nfs_sillyrename() to set it up 848 * else 849 * do the remove rpc 850 */ 851 nfs_remove(ndp) 852 register struct nameidata *ndp; 853 { 854 register struct vnode *vp = ndp->ni_vp; 855 register struct nfsnode *np = VTONFS(ndp->ni_vp); 856 register u_long *p; 857 register caddr_t cp; 858 register long t1, t2; 859 caddr_t bpos, dpos; 860 u_long xid; 861 int error = 0; 862 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 863 864 if (vp->v_usecount > 1) { 865 if (!np->n_sillyrename) 866 error = nfs_sillyrename(ndp, REMOVE); 867 } else { 868 nfsstats.rpccnt[NFSPROC_REMOVE]++; 869 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 870 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 871 nfsm_fhtom(ndp->ni_dvp); 872 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 873 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 874 nfsm_reqdone; 875 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 876 /* 877 * Kludge City: If the first reply to the remove rpc is lost.. 878 * the reply to the retransmitted request will be ENOENT 879 * since the file was in fact removed 880 * Therefore, we cheat and return success. 881 */ 882 if (error == ENOENT) 883 error = 0; 884 } 885 np->n_attrstamp = 0; 886 if (ndp->ni_dvp == vp) 887 vrele(vp); 888 else 889 nfs_nput(ndp->ni_dvp); 890 nfs_nput(vp); 891 return (error); 892 } 893 894 /* 895 * nfs file remove rpc called from nfs_inactive 896 */ 897 nfs_removeit(ndp) 898 register struct nameidata *ndp; 899 { 900 register u_long *p; 901 register caddr_t cp; 902 register long t1, t2; 903 caddr_t bpos, dpos; 904 u_long xid; 905 int error = 0; 906 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 907 908 nfsstats.rpccnt[NFSPROC_REMOVE]++; 909 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 910 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 911 nfsm_fhtom(ndp->ni_dvp); 912 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 913 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1); 914 nfsm_reqdone; 915 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 916 return (error); 917 } 918 919 /* 920 * nfs file rename call 921 */ 922 nfs_rename(sndp, tndp) 923 register struct nameidata *sndp, *tndp; 924 { 925 register u_long *p; 926 register caddr_t cp; 927 register long t1, t2; 928 caddr_t bpos, dpos; 929 u_long xid; 930 int error = 0; 931 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 932 933 nfsstats.rpccnt[NFSPROC_RENAME]++; 934 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 935 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 936 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 937 nfsm_fhtom(sndp->ni_dvp); 938 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 939 nfsm_fhtom(tndp->ni_dvp); 940 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 941 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 942 nfsm_reqdone; 943 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 944 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 945 if (sndp->ni_vp->v_type == VDIR) { 946 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 947 cache_purge(tndp->ni_dvp); 948 cache_purge(sndp->ni_dvp); 949 } 950 VOP_ABORTOP(tndp); 951 if (tndp->ni_dvp == tndp->ni_vp) 952 vrele(tndp->ni_dvp); 953 else 954 vput(tndp->ni_dvp); 955 if (tndp->ni_vp) 956 vput(tndp->ni_vp); 957 VOP_ABORTOP(sndp); 958 vrele(sndp->ni_dvp); 959 vrele(sndp->ni_vp); 960 /* 961 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 962 */ 963 if (error == ENOENT) 964 error = 0; 965 return (error); 966 } 967 968 /* 969 * nfs file rename rpc called from nfs_remove() above 970 */ 971 nfs_renameit(sndp, tndp) 972 register struct nameidata *sndp, *tndp; 973 { 974 register u_long *p; 975 register caddr_t cp; 976 register long t1, t2; 977 caddr_t bpos, dpos; 978 u_long xid; 979 int error = 0; 980 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 981 982 nfsstats.rpccnt[NFSPROC_RENAME]++; 983 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 984 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 985 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 986 nfsm_fhtom(sndp->ni_dvp); 987 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 988 nfsm_fhtom(tndp->ni_dvp); 989 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 990 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1); 991 nfsm_reqdone; 992 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 993 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 994 return (error); 995 } 996 997 /* 998 * nfs hard link create call 999 */ 1000 nfs_link(vp, ndp) 1001 register struct vnode *vp; 1002 register struct nameidata *ndp; 1003 { 1004 register u_long *p; 1005 register caddr_t cp; 1006 register long t1, t2; 1007 caddr_t bpos, dpos; 1008 u_long xid; 1009 int error = 0; 1010 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1011 1012 if (ndp->ni_dvp != vp) 1013 nfs_lock(vp); 1014 nfsstats.rpccnt[NFSPROC_LINK]++; 1015 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 1016 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1017 nfsm_fhtom(vp); 1018 nfsm_fhtom(ndp->ni_dvp); 1019 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1020 nfsm_request(vp, NFSPROC_LINK, u.u_procp, 1); 1021 nfsm_reqdone; 1022 VTONFS(vp)->n_attrstamp = 0; 1023 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1024 if (ndp->ni_dvp != vp) 1025 nfs_unlock(vp); 1026 nfs_nput(ndp->ni_dvp); 1027 /* 1028 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1029 */ 1030 if (error == EEXIST) 1031 error = 0; 1032 return (error); 1033 } 1034 1035 /* 1036 * nfs symbolic link create call 1037 */ 1038 nfs_symlink(ndp, vap, nm) 1039 struct nameidata *ndp; 1040 struct vattr *vap; 1041 char *nm; /* is this the path ?? */ 1042 { 1043 register struct nfsv2_sattr *sp; 1044 register u_long *p; 1045 register caddr_t cp; 1046 register long t1, t2; 1047 caddr_t bpos, dpos; 1048 u_long xid; 1049 int error = 0; 1050 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1051 1052 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1053 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1054 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 1055 nfsm_fhtom(ndp->ni_dvp); 1056 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1057 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1058 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1059 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1060 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1061 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1062 sp->sa_size = txdr_unsigned(VNOVAL); 1063 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1064 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1065 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, u.u_procp, 1); 1066 nfsm_reqdone; 1067 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1068 nfs_nput(ndp->ni_dvp); 1069 /* 1070 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1071 */ 1072 if (error == EEXIST) 1073 error = 0; 1074 return (error); 1075 } 1076 1077 /* 1078 * nfs make dir call 1079 */ 1080 nfs_mkdir(ndp, vap) 1081 register struct nameidata *ndp; 1082 struct vattr *vap; 1083 { 1084 register struct nfsv2_sattr *sp; 1085 register u_long *p; 1086 register caddr_t cp; 1087 register long t1, t2; 1088 register int len; 1089 caddr_t bpos, dpos, cp2; 1090 u_long xid; 1091 int error = 0, firsttry = 1; 1092 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1093 1094 len = ndp->ni_dent.d_namlen; 1095 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1096 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1097 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1098 nfsm_fhtom(ndp->ni_dvp); 1099 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1100 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1101 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1102 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1103 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1104 sp->sa_size = txdr_unsigned(VNOVAL); 1105 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1106 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1107 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, u.u_procp, 1); 1108 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1109 nfsm_reqdone; 1110 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1111 /* 1112 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1113 * if we can succeed in looking up the directory. 1114 * "firsttry" is necessary since the macros may "goto nfsmout" which 1115 * is above the if on errors. (Ugh) 1116 */ 1117 if (error == EEXIST && firsttry) { 1118 firsttry = 0; 1119 error = 0; 1120 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1121 ndp->ni_vp = NULL; 1122 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1123 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1124 nfsm_fhtom(ndp->ni_dvp); 1125 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1126 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp, 1); 1127 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1128 if (ndp->ni_vp->v_type != VDIR) { 1129 vput(ndp->ni_vp); 1130 error = EEXIST; 1131 } 1132 m_freem(mrep); 1133 } 1134 nfs_nput(ndp->ni_dvp); 1135 return (error); 1136 } 1137 1138 /* 1139 * nfs remove directory call 1140 */ 1141 nfs_rmdir(ndp) 1142 register struct nameidata *ndp; 1143 { 1144 register u_long *p; 1145 register caddr_t cp; 1146 register long t1, t2; 1147 caddr_t bpos, dpos; 1148 u_long xid; 1149 int error = 0; 1150 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1151 1152 if (ndp->ni_dvp == ndp->ni_vp) { 1153 vrele(ndp->ni_dvp); 1154 nfs_nput(ndp->ni_dvp); 1155 return (EINVAL); 1156 } 1157 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1158 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1159 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1160 nfsm_fhtom(ndp->ni_dvp); 1161 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1162 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, u.u_procp, 1); 1163 nfsm_reqdone; 1164 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1165 cache_purge(ndp->ni_dvp); 1166 cache_purge(ndp->ni_vp); 1167 nfs_nput(ndp->ni_vp); 1168 nfs_nput(ndp->ni_dvp); 1169 /* 1170 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1171 */ 1172 if (error == ENOENT) 1173 error = 0; 1174 return (error); 1175 } 1176 1177 /* 1178 * nfs readdir call 1179 * Although cookie is defined as opaque, I translate it to/from net byte 1180 * order so that it looks more sensible. This appears consistent with the 1181 * Ultrix implementation of NFS. 1182 */ 1183 nfs_readdir(vp, uiop, cred, eofflagp) 1184 register struct vnode *vp; 1185 struct uio *uiop; 1186 struct ucred *cred; 1187 int *eofflagp; 1188 { 1189 register struct nfsnode *np = VTONFS(vp); 1190 int tresid, error; 1191 struct vattr vattr; 1192 1193 if (vp->v_type != VDIR) 1194 return (EPERM); 1195 /* 1196 * First, check for hit on the EOF offset cache 1197 */ 1198 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1199 (np->n_flag & NMODIFIED) == 0 && 1200 nfs_dogetattr(vp, &vattr, cred, 0) == 0 && 1201 np->n_mtime == vattr.va_mtime.tv_sec) { 1202 *eofflagp = 1; 1203 nfsstats.direofcache_hits++; 1204 return (0); 1205 } 1206 1207 /* 1208 * Call nfs_bioread() to do the real work. 1209 */ 1210 tresid = uiop->uio_resid; 1211 error = nfs_bioread(vp, uiop, 0, cred); 1212 1213 if (!error && uiop->uio_resid == tresid) { 1214 *eofflagp = 1; 1215 nfsstats.direofcache_misses++; 1216 } else 1217 *eofflagp = 0; 1218 return (error); 1219 } 1220 1221 /* 1222 * Readdir rpc call. 1223 * Called from below the buffer cache by nfs_doio(). 1224 */ 1225 nfs_readdirrpc(vp, uiop, cred, procp) 1226 register struct vnode *vp; 1227 struct uio *uiop; 1228 struct ucred *cred; 1229 struct proc *procp; 1230 { 1231 register long len; 1232 register struct direct *dp; 1233 register u_long *p; 1234 register caddr_t cp; 1235 register long t1; 1236 long tlen, lastlen; 1237 caddr_t bpos, dpos, cp2; 1238 u_long xid; 1239 int error = 0; 1240 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1241 struct mbuf *md2; 1242 caddr_t dpos2; 1243 int siz; 1244 int more_dirs = 1; 1245 off_t off, savoff; 1246 struct direct *savdp; 1247 struct nfsmount *nmp; 1248 struct nfsnode *np = VTONFS(vp); 1249 long tresid; 1250 1251 nmp = VFSTONFS(vp->v_mount); 1252 tresid = uiop->uio_resid; 1253 /* 1254 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1255 * whichever is smaller, truncated to a multiple of DIRBLKSIZ. 1256 * The stopping criteria is EOF or buffer full. 1257 */ 1258 while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) { 1259 nfsstats.rpccnt[NFSPROC_READDIR]++; 1260 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1261 nfsm_fhtom(vp); 1262 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1263 *p++ = txdr_unsigned(uiop->uio_offset); 1264 *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1265 nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1)); 1266 nfsm_request(vp, NFSPROC_READDIR, procp, 0); 1267 siz = 0; 1268 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1269 more_dirs = fxdr_unsigned(int, *p); 1270 1271 /* Save the position so that we can do nfsm_mtouio() later */ 1272 dpos2 = dpos; 1273 md2 = md; 1274 1275 /* loop thru the dir entries, doctoring them to 4bsd form */ 1276 off = uiop->uio_offset; 1277 #ifdef lint 1278 dp = (struct direct *)0; 1279 #endif /* lint */ 1280 while (more_dirs && siz < uiop->uio_resid) { 1281 savoff = off; /* Hold onto offset and dp */ 1282 savdp = dp; 1283 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1284 dp = (struct direct *)p; 1285 dp->d_ino = fxdr_unsigned(u_long, *p++); 1286 len = fxdr_unsigned(int, *p); 1287 if (len <= 0 || len > NFS_MAXNAMLEN) { 1288 error = EBADRPC; 1289 m_freem(mrep); 1290 goto nfsmout; 1291 } 1292 dp->d_namlen = (u_short)len; 1293 nfsm_adv(len); /* Point past name */ 1294 tlen = nfsm_rndup(len); 1295 /* 1296 * This should not be necessary, but some servers have 1297 * broken XDR such that these bytes are not null filled. 1298 */ 1299 if (tlen != len) { 1300 *dpos = '\0'; /* Null-terminate */ 1301 nfsm_adv(tlen - len); 1302 len = tlen; 1303 } 1304 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1305 off = fxdr_unsigned(off_t, *p); 1306 *p++ = 0; /* Ensures null termination of name */ 1307 more_dirs = fxdr_unsigned(int, *p); 1308 dp->d_reclen = len+4*NFSX_UNSIGNED; 1309 siz += dp->d_reclen; 1310 } 1311 /* 1312 * If at end of rpc data, get the eof boolean 1313 */ 1314 if (!more_dirs) { 1315 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1316 more_dirs = (fxdr_unsigned(int, *p) == 0); 1317 1318 /* 1319 * If at EOF, cache directory offset 1320 */ 1321 if (!more_dirs) 1322 np->n_direofoffset = off; 1323 } 1324 /* 1325 * If there is too much to fit in the data buffer, use savoff and 1326 * savdp to trim off the last record. 1327 * --> we are not at eof 1328 */ 1329 if (siz > uiop->uio_resid) { 1330 off = savoff; 1331 siz -= dp->d_reclen; 1332 dp = savdp; 1333 more_dirs = 0; /* Paranoia */ 1334 } 1335 if (siz > 0) { 1336 lastlen = dp->d_reclen; 1337 md = md2; 1338 dpos = dpos2; 1339 nfsm_mtouio(uiop, siz); 1340 uiop->uio_offset = off; 1341 } else 1342 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1343 m_freem(mrep); 1344 } 1345 /* 1346 * Fill last record, iff any, out to a multiple of DIRBLKSIZ 1347 * by increasing d_reclen for the last record. 1348 */ 1349 if (uiop->uio_resid < tresid) { 1350 len = uiop->uio_resid & (DIRBLKSIZ - 1); 1351 if (len > 0) { 1352 dp = (struct direct *) 1353 (uiop->uio_iov->iov_base - lastlen); 1354 dp->d_reclen += len; 1355 uiop->uio_iov->iov_base += len; 1356 uiop->uio_iov->iov_len -= len; 1357 uiop->uio_resid -= len; 1358 } 1359 } 1360 nfsmout: 1361 return (error); 1362 } 1363 1364 static char hextoasc[] = "0123456789abcdef"; 1365 1366 /* 1367 * Silly rename. To make the NFS filesystem that is stateless look a little 1368 * more like the "ufs" a remove of an active vnode is translated to a rename 1369 * to a funny looking filename that is removed by nfs_inactive on the 1370 * nfsnode. There is the potential for another process on a different client 1371 * to create the same funny name between the nfs_lookitup() fails and the 1372 * nfs_rename() completes, but... 1373 */ 1374 nfs_sillyrename(ndp, flag) 1375 register struct nameidata *ndp; 1376 int flag; 1377 { 1378 register struct nfsnode *np; 1379 register struct sillyrename *sp; 1380 register struct nameidata *tndp; 1381 int error; 1382 short pid; 1383 1384 np = VTONFS(ndp->ni_dvp); 1385 cache_purge(ndp->ni_dvp); 1386 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1387 M_TEMP, M_WAITOK); 1388 sp->s_flag = flag; 1389 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1390 np = VTONFS(ndp->ni_vp); 1391 tndp = &sp->s_namei; 1392 tndp->ni_cred = crdup(ndp->ni_cred); 1393 1394 /* Fudge together a funny name */ 1395 pid = u.u_procp->p_pid; 1396 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1397 tndp->ni_dent.d_namlen = 12; 1398 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1399 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1400 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1401 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1402 1403 /* Try lookitups until we get one that isn't there */ 1404 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1405 tndp->ni_dent.d_name[4]++; 1406 if (tndp->ni_dent.d_name[4] > 'z') { 1407 error = EINVAL; 1408 goto bad; 1409 } 1410 } 1411 if (error = nfs_renameit(ndp, tndp)) 1412 goto bad; 1413 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1414 np->n_sillyrename = sp; 1415 return (0); 1416 bad: 1417 crfree(tndp->ni_cred); 1418 free((caddr_t)sp, M_TEMP); 1419 return (error); 1420 } 1421 1422 /* 1423 * Look up a file name for silly rename stuff. 1424 * Just like nfs_lookup() except that it doesn't load returned values 1425 * into the nfsnode table. 1426 * If fhp != NULL it copies the returned file handle out 1427 */ 1428 nfs_lookitup(vp, ndp, fhp) 1429 register struct vnode *vp; 1430 register struct nameidata *ndp; 1431 nfsv2fh_t *fhp; 1432 { 1433 register u_long *p; 1434 register caddr_t cp; 1435 register long t1, t2; 1436 caddr_t bpos, dpos, cp2; 1437 u_long xid; 1438 int error = 0; 1439 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1440 long len; 1441 1442 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1443 ndp->ni_dvp = vp; 1444 ndp->ni_vp = NULL; 1445 len = ndp->ni_dent.d_namlen; 1446 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1447 nfsm_fhtom(vp); 1448 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1449 nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 1); 1450 if (fhp != NULL) { 1451 nfsm_disect(cp, caddr_t, NFSX_FH); 1452 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1453 } 1454 nfsm_reqdone; 1455 return (error); 1456 } 1457 1458 /* 1459 * Kludge City.. 1460 * - make nfs_bmap() essentially a no-op that does no translation 1461 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1462 * after mapping the physical addresses into Kernel Virtual space in the 1463 * nfsiobuf area. 1464 * (Maybe I could use the process's page mapping, but I was concerned that 1465 * Kernel Write might not be enabled and also figured copyout() would do 1466 * a lot more work than bcopy() and also it currently happens in the 1467 * context of the swapper process (2). 1468 */ 1469 nfs_bmap(vp, bn, vpp, bnp) 1470 struct vnode *vp; 1471 daddr_t bn; 1472 struct vnode **vpp; 1473 daddr_t *bnp; 1474 { 1475 if (vpp != NULL) 1476 *vpp = vp; 1477 if (bnp != NULL) 1478 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1479 return (0); 1480 } 1481 1482 /* 1483 * Strategy routine for phys. i/o 1484 * If the biod's are running, queue a request 1485 * otherwise just call nfs_doio() to get it done 1486 */ 1487 nfs_strategy(bp) 1488 register struct buf *bp; 1489 { 1490 register struct buf *dp; 1491 register int i; 1492 int error = 0; 1493 int fnd = 0; 1494 1495 /* 1496 * Set b_proc. It seems a bit silly to do it here, but since bread() 1497 * doesn't set it, I will. 1498 * Set b_proc == NULL for asynchronous ops, since these may still 1499 * be hanging about after the process terminates. 1500 */ 1501 if ((bp->b_flags & B_PHYS) == 0) { 1502 if (bp->b_flags & B_ASYNC) 1503 bp->b_proc = (struct proc *)0; 1504 else 1505 bp->b_proc = u.u_procp; 1506 } 1507 /* 1508 * If the op is asynchronous and an i/o daemon is waiting 1509 * queue the request, wake it up and wait for completion 1510 * otherwise just do it ourselves. 1511 */ 1512 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1513 return (nfs_doio(bp)); 1514 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1515 if (nfs_iodwant[i]) { 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 wakeup((caddr_t)&nfs_iodwant[i]); 1528 break; 1529 } 1530 } 1531 if (!fnd) 1532 error = nfs_doio(bp); 1533 return (error); 1534 } 1535 1536 /* 1537 * Fun and games with i/o 1538 * Essentially play ubasetup() and disk interrupt service routine by 1539 * mapping the data buffer into kernel virtual space and doing the 1540 * nfs read or write rpc's from it. 1541 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1542 * otherwise it is called by the nfsiods to do what would normally be 1543 * partially disk interrupt driven. 1544 */ 1545 nfs_doio(bp) 1546 register struct buf *bp; 1547 { 1548 register struct uio *uiop; 1549 register struct vnode *vp; 1550 struct nfsnode *np; 1551 struct ucred *cr; 1552 struct proc *rp; 1553 int error; 1554 struct uio uio; 1555 struct iovec io; 1556 #if !defined(hp300) && !defined(i386) 1557 register struct pte *pte, *ppte; 1558 register caddr_t vaddr; 1559 int npf, npf2; 1560 int reg, o; 1561 caddr_t vbase; 1562 unsigned v; 1563 #endif 1564 1565 vp = bp->b_vp; 1566 np = VTONFS(vp); 1567 uiop = &uio; 1568 uiop->uio_iov = &io; 1569 uiop->uio_iovcnt = 1; 1570 uiop->uio_segflg = UIO_SYSSPACE; 1571 1572 /* 1573 * For phys i/o, map the b_addr into kernel virtual space using 1574 * the Nfsiomap pte's 1575 * Also, add a temporary b_rcred for reading using the process's uid 1576 * and a guess at a group 1577 */ 1578 if (bp->b_flags & B_PHYS) { 1579 rp = (bp->b_flags & B_DIRTY) ? pageproc : bp->b_proc; 1580 cr = crcopy(rp->p_ucred); 1581 #if defined(hp300) || defined(i386) 1582 /* mapping was already done by vmapbuf */ 1583 io.iov_base = bp->b_un.b_addr; 1584 #else 1585 o = (int)bp->b_un.b_addr & PGOFSET; 1586 npf2 = npf = btoc(bp->b_bcount + o); 1587 1588 /* 1589 * Get some mapping page table entries 1590 */ 1591 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1592 nfsmap_want++; 1593 (void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap", 1594 0); 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, cr, rp); 1634 (void) vnode_pager_uncache(vp); 1635 } else { 1636 uiop->uio_rw = UIO_WRITE; 1637 nfsstats.write_physios++; 1638 bp->b_error = error = nfs_writerpc(vp, uiop, cr, rp); 1639 } 1640 1641 /* 1642 * Finally, release pte's used by physical i/o 1643 */ 1644 crfree(cr); 1645 #if !defined(hp300) && !defined(i386) 1646 rmfree(nfsmap, (long)npf2, (long)++reg); 1647 if (nfsmap_want) { 1648 nfsmap_want = 0; 1649 wakeup((caddr_t)&nfsmap_want); 1650 } 1651 #endif 1652 } else { 1653 if (bp->b_flags & B_READ) { 1654 io.iov_len = uiop->uio_resid = bp->b_bcount; 1655 io.iov_base = bp->b_un.b_addr; 1656 uiop->uio_rw = UIO_READ; 1657 switch (vp->v_type) { 1658 case VREG: 1659 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1660 nfsstats.read_bios++; 1661 error = nfs_readrpc(vp, uiop, bp->b_rcred, 1662 bp->b_proc); 1663 break; 1664 case VLNK: 1665 uiop->uio_offset = 0; 1666 nfsstats.readlink_bios++; 1667 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred, 1668 bp->b_proc); 1669 break; 1670 case VDIR: 1671 uiop->uio_offset = bp->b_lblkno; 1672 nfsstats.readdir_bios++; 1673 error = nfs_readdirrpc(vp, uiop, bp->b_rcred, 1674 bp->b_proc); 1675 /* 1676 * Save offset cookie in b_blkno. 1677 */ 1678 bp->b_blkno = uiop->uio_offset; 1679 break; 1680 }; 1681 bp->b_error = error; 1682 } else { 1683 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1684 - bp->b_dirtyoff; 1685 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1686 + bp->b_dirtyoff; 1687 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1688 uiop->uio_rw = UIO_WRITE; 1689 nfsstats.write_bios++; 1690 bp->b_error = error = nfs_writerpc(vp, uiop, 1691 bp->b_wcred, bp->b_proc); 1692 if (error) { 1693 np->n_error = error; 1694 np->n_flag |= NWRITEERR; 1695 } 1696 bp->b_dirtyoff = bp->b_dirtyend = 0; 1697 } 1698 } 1699 if (error) 1700 bp->b_flags |= B_ERROR; 1701 bp->b_resid = uiop->uio_resid; 1702 biodone(bp); 1703 return (error); 1704 } 1705 1706 /* 1707 * Flush all the blocks associated with a vnode. 1708 * Walk through the buffer pool and push any dirty pages 1709 * associated with the vnode. 1710 */ 1711 /* ARGSUSED */ 1712 nfs_fsync(vp, fflags, cred, waitfor) 1713 register struct vnode *vp; 1714 int fflags; 1715 struct ucred *cred; 1716 int waitfor; 1717 { 1718 register struct nfsnode *np = VTONFS(vp); 1719 int error = 0; 1720 1721 if (np->n_flag & NMODIFIED) { 1722 np->n_flag &= ~NMODIFIED; 1723 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1724 } 1725 if (!error && (np->n_flag & NWRITEERR)) 1726 error = np->n_error; 1727 return (error); 1728 } 1729 1730 /* 1731 * NFS advisory byte-level locks. 1732 * Currently unsupported. 1733 */ 1734 nfs_advlock(vp, id, op, fl, flags) 1735 struct vnode *vp; 1736 caddr_t id; 1737 int op; 1738 struct flock *fl; 1739 int flags; 1740 { 1741 1742 return (EOPNOTSUPP); 1743 } 1744 1745 /* 1746 * Print out the contents of an nfsnode. 1747 */ 1748 nfs_print(vp) 1749 struct vnode *vp; 1750 { 1751 register struct nfsnode *np = VTONFS(vp); 1752 1753 printf("tag VT_NFS, fileid %d fsid 0x%x", 1754 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1755 #ifdef FIFO 1756 if (vp->v_type == VFIFO) 1757 fifo_printinfo(vp); 1758 #endif /* FIFO */ 1759 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1760 if (np->n_lockholder == 0) 1761 return; 1762 printf("\towner pid %d", np->n_lockholder); 1763 if (np->n_lockwaiter) 1764 printf(" waiting pid %d", np->n_lockwaiter); 1765 printf("\n"); 1766 } 1767