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 7.58 (Berkeley) 04/19/91 11 */ 12 13 /* 14 * vnode op calls for sun nfs version 2 15 */ 16 17 #include "param.h" 18 #include "proc.h" 19 #include "kernel.h" 20 #include "systm.h" 21 #include "mount.h" 22 #include "buf.h" 23 #include "malloc.h" 24 #include "mbuf.h" 25 #include "conf.h" 26 #include "namei.h" 27 #include "vnode.h" 28 #include "specdev.h" 29 #include "fifo.h" 30 #include "map.h" 31 32 #include "../ufs/quota.h" 33 #include "../ufs/inode.h" 34 35 #include "nfsv2.h" 36 #include "nfs.h" 37 #include "nfsnode.h" 38 #include "nfsmount.h" 39 #include "xdr_subs.h" 40 #include "nfsm_subs.h" 41 #include "nfsiom.h" 42 43 #include "machine/mtpr.h" 44 45 /* Defs */ 46 #define TRUE 1 47 #define FALSE 0 48 49 /* 50 * Global vfs data structures for nfs 51 */ 52 struct vnodeops nfsv2_vnodeops = { 53 nfs_lookup, /* lookup */ 54 nfs_create, /* create */ 55 nfs_mknod, /* mknod */ 56 nfs_open, /* open */ 57 nfs_close, /* close */ 58 nfs_access, /* access */ 59 nfs_getattr, /* getattr */ 60 nfs_setattr, /* setattr */ 61 nfs_read, /* read */ 62 nfs_write, /* write */ 63 nfs_ioctl, /* ioctl */ 64 nfs_select, /* select */ 65 nfs_mmap, /* mmap */ 66 nfs_fsync, /* fsync */ 67 nfs_seek, /* seek */ 68 nfs_remove, /* remove */ 69 nfs_link, /* link */ 70 nfs_rename, /* rename */ 71 nfs_mkdir, /* mkdir */ 72 nfs_rmdir, /* rmdir */ 73 nfs_symlink, /* symlink */ 74 nfs_readdir, /* readdir */ 75 nfs_readlink, /* readlink */ 76 nfs_abortop, /* abortop */ 77 nfs_inactive, /* inactive */ 78 nfs_reclaim, /* reclaim */ 79 nfs_lock, /* lock */ 80 nfs_unlock, /* unlock */ 81 nfs_bmap, /* bmap */ 82 nfs_strategy, /* strategy */ 83 nfs_print, /* print */ 84 nfs_islocked, /* islocked */ 85 nfs_advlock, /* advlock */ 86 }; 87 88 /* 89 * Special device vnode ops 90 */ 91 struct vnodeops spec_nfsv2nodeops = { 92 spec_lookup, /* lookup */ 93 spec_create, /* create */ 94 spec_mknod, /* mknod */ 95 spec_open, /* open */ 96 spec_close, /* close */ 97 nfs_access, /* access */ 98 nfs_getattr, /* getattr */ 99 nfs_setattr, /* setattr */ 100 spec_read, /* read */ 101 spec_write, /* write */ 102 spec_ioctl, /* ioctl */ 103 spec_select, /* select */ 104 spec_mmap, /* mmap */ 105 spec_fsync, /* fsync */ 106 spec_seek, /* seek */ 107 spec_remove, /* remove */ 108 spec_link, /* link */ 109 spec_rename, /* rename */ 110 spec_mkdir, /* mkdir */ 111 spec_rmdir, /* rmdir */ 112 spec_symlink, /* symlink */ 113 spec_readdir, /* readdir */ 114 spec_readlink, /* readlink */ 115 spec_abortop, /* abortop */ 116 nfs_inactive, /* inactive */ 117 nfs_reclaim, /* reclaim */ 118 nfs_lock, /* lock */ 119 nfs_unlock, /* unlock */ 120 spec_bmap, /* bmap */ 121 spec_strategy, /* strategy */ 122 nfs_print, /* print */ 123 nfs_islocked, /* islocked */ 124 spec_advlock, /* advlock */ 125 }; 126 127 #ifdef FIFO 128 struct vnodeops fifo_nfsv2nodeops = { 129 fifo_lookup, /* lookup */ 130 fifo_create, /* create */ 131 fifo_mknod, /* mknod */ 132 fifo_open, /* open */ 133 fifo_close, /* close */ 134 nfs_access, /* access */ 135 nfs_getattr, /* getattr */ 136 nfs_setattr, /* setattr */ 137 fifo_read, /* read */ 138 fifo_write, /* write */ 139 fifo_ioctl, /* ioctl */ 140 fifo_select, /* select */ 141 fifo_mmap, /* mmap */ 142 fifo_fsync, /* fsync */ 143 fifo_seek, /* seek */ 144 fifo_remove, /* remove */ 145 fifo_link, /* link */ 146 fifo_rename, /* rename */ 147 fifo_mkdir, /* mkdir */ 148 fifo_rmdir, /* rmdir */ 149 fifo_symlink, /* symlink */ 150 fifo_readdir, /* readdir */ 151 fifo_readlink, /* readlink */ 152 fifo_abortop, /* abortop */ 153 nfs_inactive, /* inactive */ 154 nfs_reclaim, /* reclaim */ 155 nfs_lock, /* lock */ 156 nfs_unlock, /* unlock */ 157 fifo_bmap, /* bmap */ 158 fifo_badop, /* strategy */ 159 nfs_print, /* print */ 160 nfs_islocked, /* islocked */ 161 fifo_advlock, /* advlock */ 162 }; 163 #endif /* FIFO */ 164 165 /* 166 * Global vars 167 */ 168 extern u_long nfs_procids[NFS_NPROCS]; 169 extern u_long nfs_prog, nfs_vers; 170 extern char nfsiobuf[MAXPHYS+NBPG]; 171 struct map nfsmap[NFS_MSIZ]; 172 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 173 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 174 int nfs_numasync = 0; 175 static int nfsmap_want = 0; 176 177 /* 178 * nfs null call from vfs. 179 */ 180 nfs_null(vp, cred, p) 181 struct vnode *vp; 182 struct ucred *cred; 183 struct proc *p; 184 { 185 caddr_t bpos, dpos; 186 u_long xid; 187 int error = 0; 188 struct mbuf *mreq, *mrep, *md, *mb; 189 190 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 191 nfsm_request(vp, NFSPROC_NULL, p, 0); 192 nfsm_reqdone; 193 return (error); 194 } 195 196 /* 197 * nfs access vnode op. 198 * Essentially just get vattr and then imitate iaccess() 199 */ 200 nfs_access(vp, mode, cred, p) 201 struct vnode *vp; 202 int mode; 203 register struct ucred *cred; 204 struct proc *p; 205 { 206 register struct vattr *vap; 207 register gid_t *gp; 208 struct vattr vattr; 209 register int i; 210 int error; 211 212 /* 213 * If you're the super-user, 214 * you always get access. 215 */ 216 if (cred->cr_uid == 0) 217 return (0); 218 vap = &vattr; 219 if (error = nfs_dogetattr(vp, vap, cred, 0, p)) 220 return (error); 221 /* 222 * Access check is based on only one of owner, group, public. 223 * If not owner, then check group. If not a member of the 224 * group, then check public access. 225 */ 226 if (cred->cr_uid != vap->va_uid) { 227 mode >>= 3; 228 gp = cred->cr_groups; 229 for (i = 0; i < cred->cr_ngroups; i++, gp++) 230 if (vap->va_gid == *gp) 231 goto found; 232 mode >>= 3; 233 found: 234 ; 235 } 236 if ((vap->va_mode & mode) != 0) 237 return (0); 238 return (EACCES); 239 } 240 241 /* 242 * nfs open vnode op 243 * Just check to see if the type is ok 244 */ 245 /* ARGSUSED */ 246 nfs_open(vp, mode, cred, p) 247 struct vnode *vp; 248 int mode; 249 struct ucred *cred; 250 struct proc *p; 251 { 252 register enum vtype vtyp; 253 254 vtyp = vp->v_type; 255 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 256 return (0); 257 else 258 return (EACCES); 259 } 260 261 /* 262 * nfs close vnode op 263 * For reg files, invalidate any buffer cache entries. 264 */ 265 /* ARGSUSED */ 266 nfs_close(vp, fflags, cred, p) 267 register struct vnode *vp; 268 int fflags; 269 struct ucred *cred; 270 struct proc *p; 271 { 272 register struct nfsnode *np = VTONFS(vp); 273 int error = 0; 274 275 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { 276 nfs_lock(vp); 277 np->n_flag &= ~NMODIFIED; 278 vinvalbuf(vp, TRUE); 279 np->n_attrstamp = 0; 280 if (np->n_flag & NWRITEERR) { 281 np->n_flag &= ~NWRITEERR; 282 error = np->n_error; 283 } 284 nfs_unlock(vp); 285 } 286 return (error); 287 } 288 289 /* 290 * nfs getattr call from vfs. 291 */ 292 nfs_getattr(vp, vap, cred, p) 293 register struct vnode *vp; 294 struct vattr *vap; 295 struct ucred *cred; 296 struct proc *p; 297 { 298 return (nfs_dogetattr(vp, vap, cred, 0, p)); 299 } 300 301 nfs_dogetattr(vp, vap, cred, tryhard, p) 302 register struct vnode *vp; 303 struct vattr *vap; 304 struct ucred *cred; 305 int tryhard; 306 struct proc *p; 307 { 308 register caddr_t cp; 309 register long t1; 310 caddr_t bpos, dpos; 311 u_long xid; 312 int error = 0; 313 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 314 315 /* First look in the cache.. */ 316 if (nfs_getattrcache(vp, vap) == 0) 317 return (0); 318 nfsstats.rpccnt[NFSPROC_GETATTR]++; 319 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 320 nfsm_fhtom(vp); 321 nfsm_request(vp, NFSPROC_GETATTR, p, tryhard); 322 nfsm_loadattr(vp, vap); 323 nfsm_reqdone; 324 return (error); 325 } 326 327 /* 328 * nfs setattr call. 329 */ 330 nfs_setattr(vp, vap, cred, p) 331 register struct vnode *vp; 332 register struct vattr *vap; 333 struct ucred *cred; 334 struct proc *p; 335 { 336 register struct nfsv2_sattr *sp; 337 register caddr_t cp; 338 register long t1; 339 caddr_t bpos, dpos; 340 u_long xid; 341 int error = 0; 342 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 343 struct nfsnode *np; 344 345 nfsstats.rpccnt[NFSPROC_SETATTR]++; 346 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 347 nfsm_fhtom(vp); 348 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 349 if (vap->va_mode == 0xffff) 350 sp->sa_mode = VNOVAL; 351 else 352 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 353 if (vap->va_uid == 0xffff) 354 sp->sa_uid = VNOVAL; 355 else 356 sp->sa_uid = txdr_unsigned(vap->va_uid); 357 if (vap->va_gid == 0xffff) 358 sp->sa_gid = VNOVAL; 359 else 360 sp->sa_gid = txdr_unsigned(vap->va_gid); 361 sp->sa_size = txdr_unsigned(vap->va_size); 362 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 363 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 364 txdr_time(&vap->va_mtime, &sp->sa_mtime); 365 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 366 vap->va_atime.tv_sec != VNOVAL) { 367 np = VTONFS(vp); 368 if (np->n_flag & NMODIFIED) { 369 np->n_flag &= ~NMODIFIED; 370 if (vap->va_size == 0) 371 vinvalbuf(vp, FALSE); 372 else 373 vinvalbuf(vp, TRUE); 374 np->n_attrstamp = 0; 375 } 376 } 377 nfsm_request(vp, NFSPROC_SETATTR, p, 1); 378 nfsm_loadattr(vp, (struct vattr *)0); 379 /* should we fill in any vap fields ?? */ 380 nfsm_reqdone; 381 return (error); 382 } 383 384 /* 385 * nfs lookup call, one step at a time... 386 * First look in cache 387 * If not found, unlock the directory nfsnode and do the rpc 388 */ 389 nfs_lookup(vp, ndp, p) 390 register struct vnode *vp; 391 register struct nameidata *ndp; 392 struct proc *p; 393 { 394 register struct vnode *vdp; 395 register u_long *tl; 396 register caddr_t cp; 397 register long t1, t2; 398 caddr_t bpos, dpos, cp2; 399 u_long xid; 400 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 401 struct vnode *newvp; 402 long len; 403 nfsv2fh_t *fhp; 404 struct nfsnode *np; 405 int lockparent, wantparent, flag, error = 0; 406 407 ndp->ni_dvp = vp; 408 ndp->ni_vp = NULL; 409 if (vp->v_type != VDIR) 410 return (ENOTDIR); 411 lockparent = ndp->ni_nameiop & LOCKPARENT; 412 flag = ndp->ni_nameiop & OPMASK; 413 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 414 if ((error = cache_lookup(ndp)) && error != ENOENT) { 415 struct vattr vattr; 416 int vpid; 417 418 #ifdef PARANOID 419 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 420 panic("nfs_lookup: .. through root"); 421 #endif 422 vdp = ndp->ni_vp; 423 vpid = vdp->v_id; 424 /* 425 * See the comment starting `Step through' in ufs/ufs_lookup.c 426 * for an explanation of the locking protocol 427 */ 428 if (vp == vdp) { 429 VREF(vdp); 430 error = 0; 431 } else if (ndp->ni_isdotdot) { 432 nfs_unlock(vp); 433 error = vget(vdp); 434 if (!error && lockparent && *ndp->ni_next == '\0') 435 nfs_lock(vp); 436 } else { 437 error = vget(vdp); 438 if (!lockparent || error || *ndp->ni_next != '\0') 439 nfs_unlock(vp); 440 } 441 if (!error) { 442 if (vpid == vdp->v_id) { 443 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&& 444 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 445 nfsstats.lookupcache_hits++; 446 return (0); 447 } 448 cache_purge(vdp); 449 } 450 nfs_nput(vdp); 451 if (lockparent && vdp != vp && *ndp->ni_next == '\0') 452 nfs_unlock(vp); 453 } 454 ndp->ni_vp = NULLVP; 455 } else 456 nfs_unlock(vp); 457 error = 0; 458 nfsstats.lookupcache_misses++; 459 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 460 len = ndp->ni_namelen; 461 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 462 nfsm_fhtom(vp); 463 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 464 nfsm_request(vp, NFSPROC_LOOKUP, p, 0); 465 nfsmout: 466 if (error) { 467 if (lockparent || (flag != CREATE && flag != RENAME) || 468 *ndp->ni_next != 0) 469 nfs_lock(vp); 470 return (error); 471 } 472 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 473 474 /* 475 * Handle DELETE and RENAME cases... 476 */ 477 if (flag == DELETE && *ndp->ni_next == 0) { 478 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 479 VREF(vp); 480 newvp = vp; 481 np = VTONFS(vp); 482 } else { 483 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 484 nfs_lock(vp); 485 m_freem(mrep); 486 return (error); 487 } 488 newvp = NFSTOV(np); 489 } 490 if (error = 491 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 492 nfs_lock(vp); 493 if (newvp != vp) 494 nfs_nput(newvp); 495 else 496 vrele(vp); 497 m_freem(mrep); 498 return (error); 499 } 500 ndp->ni_vp = newvp; 501 if (lockparent || vp == newvp) 502 nfs_lock(vp); 503 m_freem(mrep); 504 return (0); 505 } 506 507 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 508 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 509 nfs_lock(vp); 510 m_freem(mrep); 511 return (EISDIR); 512 } 513 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 514 nfs_lock(vp); 515 m_freem(mrep); 516 return (error); 517 } 518 newvp = NFSTOV(np); 519 if (error = 520 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 521 nfs_lock(vp); 522 nfs_nput(newvp); 523 m_freem(mrep); 524 return (error); 525 } 526 ndp->ni_vp = newvp; 527 if (lockparent) 528 nfs_lock(vp); 529 m_freem(mrep); 530 return (0); 531 } 532 533 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 534 VREF(vp); 535 newvp = vp; 536 np = VTONFS(vp); 537 } else if (ndp->ni_isdotdot) { 538 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 539 nfs_lock(vp); 540 m_freem(mrep); 541 return (error); 542 } 543 newvp = NFSTOV(np); 544 } else { 545 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 546 nfs_lock(vp); 547 m_freem(mrep); 548 return (error); 549 } 550 newvp = NFSTOV(np); 551 } 552 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 553 nfs_lock(vp); 554 if (newvp != vp) 555 nfs_nput(newvp); 556 else 557 vrele(vp); 558 m_freem(mrep); 559 return (error); 560 } 561 m_freem(mrep); 562 563 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 564 nfs_lock(vp); 565 ndp->ni_vp = newvp; 566 if (error == 0 && ndp->ni_makeentry) { 567 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 568 cache_enter(ndp); 569 } 570 return (error); 571 } 572 573 /* 574 * nfs read call. 575 * Just call nfs_bioread() to do the work. 576 */ 577 nfs_read(vp, uiop, ioflag, cred) 578 register struct vnode *vp; 579 struct uio *uiop; 580 int ioflag; 581 struct ucred *cred; 582 { 583 if (vp->v_type != VREG) 584 return (EPERM); 585 return (nfs_bioread(vp, uiop, ioflag, cred)); 586 } 587 588 /* 589 * nfs readlink call 590 */ 591 nfs_readlink(vp, uiop, cred) 592 struct vnode *vp; 593 struct uio *uiop; 594 struct ucred *cred; 595 { 596 if (vp->v_type != VLNK) 597 return (EPERM); 598 return (nfs_bioread(vp, uiop, 0, cred)); 599 } 600 601 /* 602 * Do a readlink rpc. 603 * Called by nfs_doio() from below the buffer cache. 604 */ 605 nfs_readlinkrpc(vp, uiop, cred) 606 register struct vnode *vp; 607 struct uio *uiop; 608 struct ucred *cred; 609 { 610 register u_long *tl; 611 register caddr_t cp; 612 register long t1; 613 caddr_t bpos, dpos, cp2; 614 u_long xid; 615 int error = 0; 616 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 617 long len; 618 619 nfsstats.rpccnt[NFSPROC_READLINK]++; 620 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 621 nfsm_fhtom(vp); 622 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0); 623 nfsm_strsiz(len, NFS_MAXPATHLEN); 624 nfsm_mtouio(uiop, len); 625 nfsm_reqdone; 626 return (error); 627 } 628 629 /* 630 * nfs read rpc call 631 * Ditto above 632 */ 633 nfs_readrpc(vp, uiop, cred) 634 register struct vnode *vp; 635 struct uio *uiop; 636 struct ucred *cred; 637 { 638 register u_long *tl; 639 register caddr_t cp; 640 register long t1; 641 caddr_t bpos, dpos, cp2; 642 u_long xid; 643 int error = 0; 644 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 645 struct nfsmount *nmp; 646 long len, retlen, tsiz; 647 648 nmp = VFSTONFS(vp->v_mount); 649 tsiz = uiop->uio_resid; 650 while (tsiz > 0) { 651 nfsstats.rpccnt[NFSPROC_READ]++; 652 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 653 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 654 nfsm_fhtom(vp); 655 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); 656 *tl++ = txdr_unsigned(uiop->uio_offset); 657 *tl++ = txdr_unsigned(len); 658 *tl = 0; 659 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1); 660 nfsm_loadattr(vp, (struct vattr *)0); 661 nfsm_strsiz(retlen, nmp->nm_rsize); 662 nfsm_mtouio(uiop, retlen); 663 m_freem(mrep); 664 if (retlen < len) 665 tsiz = 0; 666 else 667 tsiz -= len; 668 } 669 nfsmout: 670 return (error); 671 } 672 673 /* 674 * nfs write call 675 */ 676 nfs_writerpc(vp, uiop, cred) 677 register struct vnode *vp; 678 struct uio *uiop; 679 struct ucred *cred; 680 { 681 register u_long *tl; 682 register caddr_t cp; 683 register long t1; 684 caddr_t bpos, dpos; 685 u_long xid; 686 int error = 0; 687 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 688 struct nfsmount *nmp; 689 long len, tsiz; 690 691 nmp = VFSTONFS(vp->v_mount); 692 tsiz = uiop->uio_resid; 693 while (tsiz > 0) { 694 nfsstats.rpccnt[NFSPROC_WRITE]++; 695 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 696 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 697 NFSX_FH+NFSX_UNSIGNED*4); 698 nfsm_fhtom(vp); 699 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); 700 *(tl+1) = txdr_unsigned(uiop->uio_offset); 701 *(tl+3) = txdr_unsigned(len); 702 nfsm_uiotom(uiop, len); 703 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1); 704 nfsm_loadattr(vp, (struct vattr *)0); 705 m_freem(mrep); 706 tsiz -= len; 707 } 708 nfsmout: 709 return (error); 710 } 711 712 /* 713 * nfs mknod call 714 * This is a kludge. Use a create rpc but with the IFMT bits of the mode 715 * set to specify the file type and the size field for rdev. 716 */ 717 /* ARGSUSED */ 718 nfs_mknod(ndp, vap, cred, p) 719 struct nameidata *ndp; 720 struct ucred *cred; 721 register struct vattr *vap; 722 struct proc *p; 723 { 724 register struct nfsv2_sattr *sp; 725 register u_long *tl; 726 register caddr_t cp; 727 register long t1, t2; 728 caddr_t bpos, dpos; 729 u_long xid; 730 int error = 0; 731 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 732 u_long rdev; 733 734 if (vap->va_type == VCHR || vap->va_type == VBLK) 735 rdev = txdr_unsigned(vap->va_rdev); 736 #ifdef FIFO 737 else if (vap->va_type == VFIFO) 738 rdev = 0xffffffff; 739 #endif /* FIFO */ 740 else { 741 VOP_ABORTOP(ndp); 742 vput(ndp->ni_dvp); 743 return (EOPNOTSUPP); 744 } 745 nfsstats.rpccnt[NFSPROC_CREATE]++; 746 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 747 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 748 nfsm_fhtom(ndp->ni_dvp); 749 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 750 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 751 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 752 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 753 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 754 sp->sa_size = rdev; 755 /* or should these be VNOVAL ?? */ 756 txdr_time(&vap->va_atime, &sp->sa_atime); 757 txdr_time(&vap->va_mtime, &sp->sa_mtime); 758 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 759 nfsm_reqdone; 760 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 761 nfs_nput(ndp->ni_dvp); 762 return (error); 763 } 764 765 /* 766 * nfs file create call 767 */ 768 nfs_create(ndp, vap, p) 769 register struct nameidata *ndp; 770 register struct vattr *vap; 771 struct proc *p; 772 { 773 register struct nfsv2_sattr *sp; 774 register u_long *tl; 775 register caddr_t cp; 776 register long t1, t2; 777 caddr_t bpos, dpos, cp2; 778 u_long xid; 779 int error = 0; 780 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 781 782 nfsstats.rpccnt[NFSPROC_CREATE]++; 783 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 784 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 785 nfsm_fhtom(ndp->ni_dvp); 786 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 787 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 788 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); 789 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 790 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 791 sp->sa_size = txdr_unsigned(0); 792 /* or should these be VNOVAL ?? */ 793 txdr_time(&vap->va_atime, &sp->sa_atime); 794 txdr_time(&vap->va_mtime, &sp->sa_mtime); 795 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); 796 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 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 remove call 805 * To try and make nfs semantics closer to ufs semantics, a file that has 806 * other processes using the vnode is renamed instead of removed and then 807 * removed later on the last close. 808 * - If v_usecount > 1 809 * If a rename is not already in the works 810 * call nfs_sillyrename() to set it up 811 * else 812 * do the remove rpc 813 */ 814 nfs_remove(ndp, p) 815 register struct nameidata *ndp; 816 struct proc *p; 817 { 818 register struct vnode *vp = ndp->ni_vp; 819 register struct nfsnode *np = VTONFS(ndp->ni_vp); 820 register u_long *tl; 821 register caddr_t cp; 822 register long t1, t2; 823 caddr_t bpos, dpos; 824 u_long xid; 825 int error = 0; 826 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 827 828 if (vp->v_usecount > 1) { 829 if (!np->n_sillyrename) 830 error = nfs_sillyrename(ndp, p); 831 } else { 832 nfsstats.rpccnt[NFSPROC_REMOVE]++; 833 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 834 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 835 nfsm_fhtom(ndp->ni_dvp); 836 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 837 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1); 838 nfsm_reqdone; 839 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 840 /* 841 * Kludge City: If the first reply to the remove rpc is lost.. 842 * the reply to the retransmitted request will be ENOENT 843 * since the file was in fact removed 844 * Therefore, we cheat and return success. 845 */ 846 if (error == ENOENT) 847 error = 0; 848 } 849 np->n_attrstamp = 0; 850 if (ndp->ni_dvp == vp) 851 vrele(vp); 852 else 853 nfs_nput(ndp->ni_dvp); 854 nfs_nput(vp); 855 return (error); 856 } 857 858 /* 859 * nfs file remove rpc called from nfs_inactive 860 */ 861 nfs_removeit(sp, p) 862 register struct sillyrename *sp; 863 struct proc *p; 864 { 865 register u_long *tl; 866 register caddr_t cp; 867 register long t1, t2; 868 caddr_t bpos, dpos; 869 u_long xid; 870 int error = 0; 871 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 872 873 nfsstats.rpccnt[NFSPROC_REMOVE]++; 874 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred, 875 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); 876 nfsm_fhtom(sp->s_dvp); 877 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 878 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1); 879 nfsm_reqdone; 880 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 881 return (error); 882 } 883 884 /* 885 * nfs file rename call 886 */ 887 nfs_rename(sndp, tndp, p) 888 register struct nameidata *sndp, *tndp; 889 struct proc *p; 890 { 891 register u_long *tl; 892 register caddr_t cp; 893 register long t1, t2; 894 caddr_t bpos, dpos; 895 u_long xid; 896 int error = 0; 897 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 898 899 nfsstats.rpccnt[NFSPROC_RENAME]++; 900 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 901 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 902 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 903 nfsm_fhtom(sndp->ni_dvp); 904 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 905 nfsm_fhtom(tndp->ni_dvp); 906 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 907 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 908 nfsm_reqdone; 909 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 910 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; 911 if (sndp->ni_vp->v_type == VDIR) { 912 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 913 cache_purge(tndp->ni_dvp); 914 cache_purge(sndp->ni_dvp); 915 } 916 VOP_ABORTOP(tndp); 917 if (tndp->ni_dvp == tndp->ni_vp) 918 vrele(tndp->ni_dvp); 919 else 920 vput(tndp->ni_dvp); 921 if (tndp->ni_vp) 922 vput(tndp->ni_vp); 923 VOP_ABORTOP(sndp); 924 vrele(sndp->ni_dvp); 925 vrele(sndp->ni_vp); 926 /* 927 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 928 */ 929 if (error == ENOENT) 930 error = 0; 931 return (error); 932 } 933 934 /* 935 * nfs file rename rpc called from nfs_remove() above 936 */ 937 nfs_renameit(sndp, sp, p) 938 register struct nameidata *sndp; 939 register struct sillyrename *sp; 940 struct proc *p; 941 { 942 register u_long *tl; 943 register caddr_t cp; 944 register long t1, t2; 945 caddr_t bpos, dpos; 946 u_long xid; 947 int error = 0; 948 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 949 950 nfsstats.rpccnt[NFSPROC_RENAME]++; 951 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred, 952 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 953 nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/ 954 nfsm_fhtom(sndp->ni_dvp); 955 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 956 nfsm_fhtom(sp->s_dvp); 957 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); 958 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); 959 nfsm_reqdone; 960 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; 961 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; 962 return (error); 963 } 964 965 /* 966 * nfs hard link create call 967 */ 968 nfs_link(vp, ndp, p) 969 register struct vnode *vp; 970 register struct nameidata *ndp; 971 struct proc *p; 972 { 973 register u_long *tl; 974 register caddr_t cp; 975 register long t1, t2; 976 caddr_t bpos, dpos; 977 u_long xid; 978 int error = 0; 979 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 980 981 if (ndp->ni_dvp != vp) 982 nfs_lock(vp); 983 nfsstats.rpccnt[NFSPROC_LINK]++; 984 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 985 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 986 nfsm_fhtom(vp); 987 nfsm_fhtom(ndp->ni_dvp); 988 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 989 nfsm_request(vp, NFSPROC_LINK, p, 1); 990 nfsm_reqdone; 991 VTONFS(vp)->n_attrstamp = 0; 992 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 993 if (ndp->ni_dvp != vp) 994 nfs_unlock(vp); 995 nfs_nput(ndp->ni_dvp); 996 /* 997 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 998 */ 999 if (error == EEXIST) 1000 error = 0; 1001 return (error); 1002 } 1003 1004 /* 1005 * nfs symbolic link create call 1006 */ 1007 nfs_symlink(ndp, vap, nm, p) 1008 struct nameidata *ndp; 1009 struct vattr *vap; 1010 char *nm; /* is this the path ?? */ 1011 struct proc *p; 1012 { 1013 register struct nfsv2_sattr *sp; 1014 register u_long *tl; 1015 register caddr_t cp; 1016 register long t1, t2; 1017 caddr_t bpos, dpos; 1018 u_long xid; 1019 int error = 0; 1020 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1021 1022 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1023 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 1024 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 1025 nfsm_fhtom(ndp->ni_dvp); 1026 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1027 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 1028 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1029 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 1030 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1031 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1032 sp->sa_size = txdr_unsigned(VNOVAL); 1033 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1034 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1035 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1); 1036 nfsm_reqdone; 1037 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1038 nfs_nput(ndp->ni_dvp); 1039 /* 1040 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1041 */ 1042 if (error == EEXIST) 1043 error = 0; 1044 return (error); 1045 } 1046 1047 /* 1048 * nfs make dir call 1049 */ 1050 nfs_mkdir(ndp, vap, p) 1051 register struct nameidata *ndp; 1052 struct vattr *vap; 1053 struct proc *p; 1054 { 1055 register struct nfsv2_sattr *sp; 1056 register u_long *tl; 1057 register caddr_t cp; 1058 register long t1, t2; 1059 register int len; 1060 caddr_t bpos, dpos, cp2; 1061 u_long xid; 1062 int error = 0, firsttry = 1; 1063 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1064 1065 len = ndp->ni_dent.d_namlen; 1066 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1067 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1068 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); 1069 nfsm_fhtom(ndp->ni_dvp); 1070 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1071 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1072 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); 1073 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 1074 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 1075 sp->sa_size = txdr_unsigned(VNOVAL); 1076 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 1077 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 1078 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1); 1079 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1080 nfsm_reqdone; 1081 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1082 /* 1083 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 1084 * if we can succeed in looking up the directory. 1085 * "firsttry" is necessary since the macros may "goto nfsmout" which 1086 * is above the if on errors. (Ugh) 1087 */ 1088 if (error == EEXIST && firsttry) { 1089 firsttry = 0; 1090 error = 0; 1091 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1092 ndp->ni_vp = NULL; 1093 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, 1094 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1095 nfsm_fhtom(ndp->ni_dvp); 1096 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1097 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1); 1098 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1099 if (ndp->ni_vp->v_type != VDIR) { 1100 vput(ndp->ni_vp); 1101 error = EEXIST; 1102 } 1103 m_freem(mrep); 1104 } 1105 nfs_nput(ndp->ni_dvp); 1106 return (error); 1107 } 1108 1109 /* 1110 * nfs remove directory call 1111 */ 1112 nfs_rmdir(ndp, p) 1113 register struct nameidata *ndp; 1114 struct proc *p; 1115 { 1116 register u_long *tl; 1117 register caddr_t cp; 1118 register long t1, t2; 1119 caddr_t bpos, dpos; 1120 u_long xid; 1121 int error = 0; 1122 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1123 1124 if (ndp->ni_dvp == ndp->ni_vp) { 1125 vrele(ndp->ni_dvp); 1126 nfs_nput(ndp->ni_dvp); 1127 return (EINVAL); 1128 } 1129 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1130 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1131 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1132 nfsm_fhtom(ndp->ni_dvp); 1133 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1134 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1); 1135 nfsm_reqdone; 1136 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; 1137 cache_purge(ndp->ni_dvp); 1138 cache_purge(ndp->ni_vp); 1139 nfs_nput(ndp->ni_vp); 1140 nfs_nput(ndp->ni_dvp); 1141 /* 1142 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1143 */ 1144 if (error == ENOENT) 1145 error = 0; 1146 return (error); 1147 } 1148 1149 /* 1150 * nfs readdir call 1151 * Although cookie is defined as opaque, I translate it to/from net byte 1152 * order so that it looks more sensible. This appears consistent with the 1153 * Ultrix implementation of NFS. 1154 */ 1155 nfs_readdir(vp, uiop, cred, eofflagp) 1156 register struct vnode *vp; 1157 struct uio *uiop; 1158 struct ucred *cred; 1159 int *eofflagp; 1160 { 1161 register struct nfsnode *np = VTONFS(vp); 1162 int tresid, error; 1163 struct vattr vattr; 1164 1165 if (vp->v_type != VDIR) 1166 return (EPERM); 1167 /* 1168 * First, check for hit on the EOF offset cache 1169 */ 1170 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1171 (np->n_flag & NMODIFIED) == 0 && 1172 nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 && 1173 np->n_mtime == vattr.va_mtime.tv_sec) { 1174 *eofflagp = 1; 1175 nfsstats.direofcache_hits++; 1176 return (0); 1177 } 1178 1179 /* 1180 * Call nfs_bioread() to do the real work. 1181 */ 1182 tresid = uiop->uio_resid; 1183 error = nfs_bioread(vp, uiop, 0, cred); 1184 1185 if (!error && uiop->uio_resid == tresid) { 1186 *eofflagp = 1; 1187 nfsstats.direofcache_misses++; 1188 } else 1189 *eofflagp = 0; 1190 return (error); 1191 } 1192 1193 /* 1194 * Readdir rpc call. 1195 * Called from below the buffer cache by nfs_doio(). 1196 */ 1197 nfs_readdirrpc(vp, uiop, cred) 1198 register struct vnode *vp; 1199 struct uio *uiop; 1200 struct ucred *cred; 1201 { 1202 register long len; 1203 register struct direct *dp; 1204 register u_long *tl; 1205 register caddr_t cp; 1206 register long t1; 1207 long tlen, lastlen; 1208 caddr_t bpos, dpos, cp2; 1209 u_long xid; 1210 int error = 0; 1211 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1212 struct mbuf *md2; 1213 caddr_t dpos2; 1214 int siz; 1215 int more_dirs = 1; 1216 off_t off, savoff; 1217 struct direct *savdp; 1218 struct nfsmount *nmp; 1219 struct nfsnode *np = VTONFS(vp); 1220 long tresid; 1221 1222 nmp = VFSTONFS(vp->v_mount); 1223 tresid = uiop->uio_resid; 1224 /* 1225 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1226 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. 1227 * The stopping criteria is EOF or buffer full. 1228 */ 1229 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { 1230 nfsstats.rpccnt[NFSPROC_READDIR]++; 1231 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1232 nfsm_fhtom(vp); 1233 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1234 *tl++ = txdr_unsigned(uiop->uio_offset); 1235 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1236 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); 1237 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0); 1238 siz = 0; 1239 nfsm_disect(tl, u_long *, NFSX_UNSIGNED); 1240 more_dirs = fxdr_unsigned(int, *tl); 1241 1242 /* Save the position so that we can do nfsm_mtouio() later */ 1243 dpos2 = dpos; 1244 md2 = md; 1245 1246 /* loop thru the dir entries, doctoring them to 4bsd form */ 1247 off = uiop->uio_offset; 1248 #ifdef lint 1249 dp = (struct direct *)0; 1250 #endif /* lint */ 1251 while (more_dirs && siz < uiop->uio_resid) { 1252 savoff = off; /* Hold onto offset and dp */ 1253 savdp = dp; 1254 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1255 dp = (struct direct *)tl; 1256 dp->d_ino = fxdr_unsigned(u_long, *tl++); 1257 len = fxdr_unsigned(int, *tl); 1258 if (len <= 0 || len > NFS_MAXNAMLEN) { 1259 error = EBADRPC; 1260 m_freem(mrep); 1261 goto nfsmout; 1262 } 1263 dp->d_namlen = (u_short)len; 1264 nfsm_adv(len); /* Point past name */ 1265 tlen = nfsm_rndup(len); 1266 /* 1267 * This should not be necessary, but some servers have 1268 * broken XDR such that these bytes are not null filled. 1269 */ 1270 if (tlen != len) { 1271 *dpos = '\0'; /* Null-terminate */ 1272 nfsm_adv(tlen - len); 1273 len = tlen; 1274 } 1275 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); 1276 off = fxdr_unsigned(off_t, *tl); 1277 *tl++ = 0; /* Ensures null termination of name */ 1278 more_dirs = fxdr_unsigned(int, *tl); 1279 dp->d_reclen = len+4*NFSX_UNSIGNED; 1280 siz += dp->d_reclen; 1281 } 1282 /* 1283 * If at end of rpc data, get the eof boolean 1284 */ 1285 if (!more_dirs) { 1286 nfsm_disecton(tl, u_long *, NFSX_UNSIGNED); 1287 more_dirs = (fxdr_unsigned(int, *tl) == 0); 1288 1289 /* 1290 * If at EOF, cache directory offset 1291 */ 1292 if (!more_dirs) 1293 np->n_direofoffset = off; 1294 } 1295 /* 1296 * If there is too much to fit in the data buffer, use savoff and 1297 * savdp to trim off the last record. 1298 * --> we are not at eof 1299 */ 1300 if (siz > uiop->uio_resid) { 1301 off = savoff; 1302 siz -= dp->d_reclen; 1303 dp = savdp; 1304 more_dirs = 0; /* Paranoia */ 1305 } 1306 if (siz > 0) { 1307 lastlen = dp->d_reclen; 1308 md = md2; 1309 dpos = dpos2; 1310 nfsm_mtouio(uiop, siz); 1311 uiop->uio_offset = off; 1312 } else 1313 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1314 m_freem(mrep); 1315 } 1316 /* 1317 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ 1318 * by increasing d_reclen for the last record. 1319 */ 1320 if (uiop->uio_resid < tresid) { 1321 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); 1322 if (len > 0) { 1323 dp = (struct direct *) 1324 (uiop->uio_iov->iov_base - lastlen); 1325 dp->d_reclen += len; 1326 uiop->uio_iov->iov_base += len; 1327 uiop->uio_iov->iov_len -= len; 1328 uiop->uio_resid -= len; 1329 } 1330 } 1331 nfsmout: 1332 return (error); 1333 } 1334 1335 static char hextoasc[] = "0123456789abcdef"; 1336 1337 /* 1338 * Silly rename. To make the NFS filesystem that is stateless look a little 1339 * more like the "ufs" a remove of an active vnode is translated to a rename 1340 * to a funny looking filename that is removed by nfs_inactive on the 1341 * nfsnode. There is the potential for another process on a different client 1342 * to create the same funny name between the nfs_lookitup() fails and the 1343 * nfs_rename() completes, but... 1344 */ 1345 nfs_sillyrename(ndp, p) 1346 register struct nameidata *ndp; 1347 struct proc *p; 1348 { 1349 register struct nfsnode *np; 1350 register struct sillyrename *sp; 1351 int error; 1352 short pid; 1353 1354 np = VTONFS(ndp->ni_dvp); 1355 cache_purge(ndp->ni_dvp); 1356 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1357 M_NFSREQ, M_WAITOK); 1358 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1359 np = VTONFS(ndp->ni_vp); 1360 sp->s_cred = crdup(ndp->ni_cred); 1361 sp->s_dvp = ndp->ni_dvp; 1362 VREF(sp->s_dvp); 1363 1364 /* Fudge together a funny name */ 1365 pid = p->p_pid; 1366 bcopy(".nfsAxxxx4.4", sp->s_name, 13); 1367 sp->s_namlen = 12; 1368 sp->s_name[8] = hextoasc[pid & 0xf]; 1369 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 1370 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 1371 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 1372 1373 /* Try lookitups until we get one that isn't there */ 1374 while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) { 1375 sp->s_name[4]++; 1376 if (sp->s_name[4] > 'z') { 1377 error = EINVAL; 1378 goto bad; 1379 } 1380 } 1381 if (error = nfs_renameit(ndp, sp, p)) 1382 goto bad; 1383 nfs_lookitup(sp, &np->n_fh, p); 1384 np->n_sillyrename = sp; 1385 return (0); 1386 bad: 1387 vrele(sp->s_dvp); 1388 crfree(sp->s_cred); 1389 free((caddr_t)sp, M_NFSREQ); 1390 return (error); 1391 } 1392 1393 /* 1394 * Look up a file name for silly rename stuff. 1395 * Just like nfs_lookup() except that it doesn't load returned values 1396 * into the nfsnode table. 1397 * If fhp != NULL it copies the returned file handle out 1398 */ 1399 nfs_lookitup(sp, fhp, p) 1400 register struct sillyrename *sp; 1401 nfsv2fh_t *fhp; 1402 struct proc *p; 1403 { 1404 register struct vnode *vp = sp->s_dvp; 1405 register u_long *tl; 1406 register caddr_t cp; 1407 register long t1, t2; 1408 caddr_t bpos, dpos, cp2; 1409 u_long xid; 1410 int error = 0; 1411 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1412 long len; 1413 1414 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1415 len = sp->s_namlen; 1416 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1417 nfsm_fhtom(vp); 1418 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); 1419 nfsm_request(vp, NFSPROC_LOOKUP, p, 1); 1420 if (fhp != NULL) { 1421 nfsm_disect(cp, caddr_t, NFSX_FH); 1422 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1423 } 1424 nfsm_reqdone; 1425 return (error); 1426 } 1427 1428 /* 1429 * Kludge City.. 1430 * - make nfs_bmap() essentially a no-op that does no translation 1431 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc 1432 * after mapping the physical addresses into Kernel Virtual space in the 1433 * nfsiobuf area. 1434 * (Maybe I could use the process's page mapping, but I was concerned that 1435 * Kernel Write might not be enabled and also figured copyout() would do 1436 * a lot more work than bcopy() and also it currently happens in the 1437 * context of the swapper process (2). 1438 */ 1439 nfs_bmap(vp, bn, vpp, bnp) 1440 struct vnode *vp; 1441 daddr_t bn; 1442 struct vnode **vpp; 1443 daddr_t *bnp; 1444 { 1445 if (vpp != NULL) 1446 *vpp = vp; 1447 if (bnp != NULL) 1448 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); 1449 return (0); 1450 } 1451 1452 /* 1453 * Strategy routine for phys. i/o 1454 * If the biod's are running, queue a request 1455 * otherwise just call nfs_doio() to get it done 1456 */ 1457 nfs_strategy(bp) 1458 register struct buf *bp; 1459 { 1460 register struct buf *dp; 1461 register int i; 1462 int error = 0; 1463 int fnd = 0; 1464 1465 /* 1466 * Set b_proc. It seems a bit silly to do it here, but since bread() 1467 * doesn't set it, I will. 1468 * Set b_proc == NULL for asynchronous ops, since these may still 1469 * be hanging about after the process terminates. 1470 */ 1471 if ((bp->b_flags & B_PHYS) == 0) { 1472 if (bp->b_flags & B_ASYNC) 1473 bp->b_proc = (struct proc *)0; 1474 else 1475 bp->b_proc = curproc; 1476 } 1477 /* 1478 * If the op is asynchronous and an i/o daemon is waiting 1479 * queue the request, wake it up and wait for completion 1480 * otherwise just do it ourselves. 1481 */ 1482 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) 1483 return (nfs_doio(bp)); 1484 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1485 if (nfs_iodwant[i]) { 1486 dp = &nfs_bqueue; 1487 if (dp->b_actf == NULL) { 1488 dp->b_actl = bp; 1489 bp->b_actf = dp; 1490 } else { 1491 dp->b_actf->b_actl = bp; 1492 bp->b_actf = dp->b_actf; 1493 } 1494 dp->b_actf = bp; 1495 bp->b_actl = dp; 1496 fnd++; 1497 wakeup((caddr_t)&nfs_iodwant[i]); 1498 break; 1499 } 1500 } 1501 if (!fnd) 1502 error = nfs_doio(bp); 1503 return (error); 1504 } 1505 1506 /* 1507 * Fun and games with i/o 1508 * Essentially play ubasetup() and disk interrupt service routine by 1509 * mapping the data buffer into kernel virtual space and doing the 1510 * nfs read or write rpc's from it. 1511 * If the nfsiod's are not running, this is just called from nfs_strategy(), 1512 * otherwise it is called by the nfsiods to do what would normally be 1513 * partially disk interrupt driven. 1514 */ 1515 nfs_doio(bp) 1516 register struct buf *bp; 1517 { 1518 register struct uio *uiop; 1519 register struct vnode *vp; 1520 struct nfsnode *np; 1521 struct ucred *cr; 1522 int error; 1523 struct uio uio; 1524 struct iovec io; 1525 #if !defined(hp300) && !defined(i386) 1526 register struct pte *pte, *ppte; 1527 register caddr_t vaddr; 1528 int npf, npf2; 1529 int reg, o; 1530 caddr_t vbase; 1531 unsigned v; 1532 #endif 1533 1534 vp = bp->b_vp; 1535 np = VTONFS(vp); 1536 uiop = &uio; 1537 uiop->uio_iov = &io; 1538 uiop->uio_iovcnt = 1; 1539 uiop->uio_segflg = UIO_SYSSPACE; 1540 uiop->uio_procp = (struct proc *)0; 1541 1542 /* 1543 * For phys i/o, map the b_addr into kernel virtual space using 1544 * the Nfsiomap pte's 1545 * Also, add a temporary b_rcred for reading using the process's uid 1546 * and a guess at a group 1547 */ 1548 if (bp->b_flags & B_PHYS) { 1549 if (bp->b_flags & B_DIRTY) 1550 uiop->uio_procp = pageproc; 1551 cr = crcopy(uiop->uio_procp->p_ucred); 1552 #if defined(hp300) || defined(i386) 1553 /* mapping was already done by vmapbuf */ 1554 io.iov_base = bp->b_un.b_addr; 1555 #else 1556 o = (int)bp->b_un.b_addr & PGOFSET; 1557 npf2 = npf = btoc(bp->b_bcount + o); 1558 1559 /* 1560 * Get some mapping page table entries 1561 */ 1562 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1563 nfsmap_want++; 1564 (void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap", 1565 0); 1566 } 1567 reg--; 1568 if (bp->b_flags & B_PAGET) 1569 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1570 else { 1571 v = btop(bp->b_un.b_addr); 1572 if (bp->b_flags & B_UAREA) 1573 pte = &uiop->uio_procp->p_addr[v]; 1574 else 1575 pte = vtopte(uiop->uio_procp, v); 1576 } 1577 1578 /* 1579 * Play vmaccess() but with the Nfsiomap page table 1580 */ 1581 ppte = &Nfsiomap[reg]; 1582 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1583 while (npf != 0) { 1584 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1585 #if defined(tahoe) 1586 mtpr(P1DC, vaddr); 1587 #endif 1588 ppte++; 1589 pte++; 1590 vaddr += NBPG; 1591 --npf; 1592 } 1593 io.iov_base = vbase+o; 1594 #endif /* !defined(hp300) */ 1595 1596 /* 1597 * And do the i/o rpc 1598 */ 1599 io.iov_len = uiop->uio_resid = bp->b_bcount; 1600 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1601 if (bp->b_flags & B_READ) { 1602 uiop->uio_rw = UIO_READ; 1603 nfsstats.read_physios++; 1604 bp->b_error = error = nfs_readrpc(vp, uiop, cr); 1605 (void) vnode_pager_uncache(vp); 1606 } else { 1607 uiop->uio_rw = UIO_WRITE; 1608 nfsstats.write_physios++; 1609 bp->b_error = error = nfs_writerpc(vp, uiop, cr); 1610 } 1611 1612 /* 1613 * Finally, release pte's used by physical i/o 1614 */ 1615 crfree(cr); 1616 #if !defined(hp300) && !defined(i386) 1617 rmfree(nfsmap, (long)npf2, (long)++reg); 1618 if (nfsmap_want) { 1619 nfsmap_want = 0; 1620 wakeup((caddr_t)&nfsmap_want); 1621 } 1622 #endif 1623 } else { 1624 if (bp->b_flags & B_READ) { 1625 io.iov_len = uiop->uio_resid = bp->b_bcount; 1626 io.iov_base = bp->b_un.b_addr; 1627 uiop->uio_rw = UIO_READ; 1628 switch (vp->v_type) { 1629 case VREG: 1630 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1631 nfsstats.read_bios++; 1632 error = nfs_readrpc(vp, uiop, bp->b_rcred); 1633 break; 1634 case VLNK: 1635 uiop->uio_offset = 0; 1636 nfsstats.readlink_bios++; 1637 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); 1638 break; 1639 case VDIR: 1640 uiop->uio_offset = bp->b_lblkno; 1641 nfsstats.readdir_bios++; 1642 error = nfs_readdirrpc(vp, uiop, bp->b_rcred); 1643 /* 1644 * Save offset cookie in b_blkno. 1645 */ 1646 bp->b_blkno = uiop->uio_offset; 1647 break; 1648 }; 1649 bp->b_error = error; 1650 } else { 1651 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1652 - bp->b_dirtyoff; 1653 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1654 + bp->b_dirtyoff; 1655 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1656 uiop->uio_rw = UIO_WRITE; 1657 nfsstats.write_bios++; 1658 bp->b_error = error = nfs_writerpc(vp, uiop, 1659 bp->b_wcred); 1660 if (error) { 1661 np->n_error = error; 1662 np->n_flag |= NWRITEERR; 1663 } 1664 bp->b_dirtyoff = bp->b_dirtyend = 0; 1665 } 1666 } 1667 if (error) 1668 bp->b_flags |= B_ERROR; 1669 bp->b_resid = uiop->uio_resid; 1670 biodone(bp); 1671 return (error); 1672 } 1673 1674 /* 1675 * Mmap a file 1676 * 1677 * NB Currently unsupported. 1678 */ 1679 /* ARGSUSED */ 1680 nfs_mmap(vp, fflags, cred, p) 1681 struct vnode *vp; 1682 int fflags; 1683 struct ucred *cred; 1684 struct proc *p; 1685 { 1686 1687 return (EINVAL); 1688 } 1689 1690 /* 1691 * Flush all the blocks associated with a vnode. 1692 * Walk through the buffer pool and push any dirty pages 1693 * associated with the vnode. 1694 */ 1695 /* ARGSUSED */ 1696 nfs_fsync(vp, fflags, cred, waitfor, p) 1697 register struct vnode *vp; 1698 int fflags; 1699 struct ucred *cred; 1700 int waitfor; 1701 struct proc *p; 1702 { 1703 register struct nfsnode *np = VTONFS(vp); 1704 int error = 0; 1705 1706 if (np->n_flag & NMODIFIED) { 1707 np->n_flag &= ~NMODIFIED; 1708 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1709 } 1710 if (!error && (np->n_flag & NWRITEERR)) 1711 error = np->n_error; 1712 return (error); 1713 } 1714 1715 /* 1716 * NFS advisory byte-level locks. 1717 * Currently unsupported. 1718 */ 1719 nfs_advlock(vp, id, op, fl, flags) 1720 struct vnode *vp; 1721 caddr_t id; 1722 int op; 1723 struct flock *fl; 1724 int flags; 1725 { 1726 1727 return (EOPNOTSUPP); 1728 } 1729 1730 /* 1731 * Print out the contents of an nfsnode. 1732 */ 1733 nfs_print(vp) 1734 struct vnode *vp; 1735 { 1736 register struct nfsnode *np = VTONFS(vp); 1737 1738 printf("tag VT_NFS, fileid %d fsid 0x%x", 1739 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1740 #ifdef FIFO 1741 if (vp->v_type == VFIFO) 1742 fifo_printinfo(vp); 1743 #endif /* FIFO */ 1744 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1745 if (np->n_lockholder == 0) 1746 return; 1747 printf("\towner pid %d", np->n_lockholder); 1748 if (np->n_lockwaiter) 1749 printf(" waiting pid %d", np->n_lockwaiter); 1750 printf("\n"); 1751 } 1752