1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * @(#)nfs_vnops.c 7.33 (Berkeley) 03/06/90 21 */ 22 23 /* 24 * vnode op calls for sun nfs version 2 25 */ 26 27 #include "machine/pte.h" 28 #include "machine/mtpr.h" 29 #include "param.h" 30 #include "user.h" 31 #include "proc.h" 32 #include "kernel.h" 33 #include "mount.h" 34 #include "buf.h" 35 #include "vm.h" 36 #include "malloc.h" 37 #include "mbuf.h" 38 #include "errno.h" 39 #include "file.h" 40 #include "conf.h" 41 #include "vnode.h" 42 #include "text.h" 43 #include "map.h" 44 #include "nfsv2.h" 45 #include "nfs.h" 46 #include "nfsnode.h" 47 #include "nfsmount.h" 48 #include "xdr_subs.h" 49 #include "nfsm_subs.h" 50 #include "nfsiom.h" 51 52 /* Defs */ 53 #define TRUE 1 54 #define FALSE 0 55 56 /* Global vars */ 57 int nfs_lookup(), 58 nfs_create(), 59 nfs_mknod(), 60 nfs_open(), 61 nfs_close(), 62 nfs_access(), 63 nfs_getattr(), 64 nfs_setattr(), 65 nfs_read(), 66 nfs_write(), 67 vfs_noop(), 68 vfs_nullop(), 69 nfs_remove(), 70 nfs_link(), 71 nfs_rename(), 72 nfs_mkdir(), 73 nfs_rmdir(), 74 nfs_symlink(), 75 nfs_readdir(), 76 nfs_readlink(), 77 nfs_abortop(), 78 nfs_lock(), 79 nfs_unlock(), 80 nfs_bmap(), 81 nfs_strategy(), 82 nfs_fsync(), 83 nfs_inactive(), 84 nfs_reclaim(), 85 nfs_print(), 86 nfs_islocked(); 87 88 struct vnodeops nfsv2_vnodeops = { 89 nfs_lookup, /* lookup */ 90 nfs_create, /* create */ 91 nfs_mknod, /* mknod */ 92 nfs_open, /* open */ 93 nfs_close, /* close */ 94 nfs_access, /* access */ 95 nfs_getattr, /* getattr */ 96 nfs_setattr, /* setattr */ 97 nfs_read, /* read */ 98 nfs_write, /* write */ 99 vfs_noop, /* ioctl */ 100 vfs_noop, /* select */ 101 vfs_noop, /* mmap */ 102 nfs_fsync, /* fsync */ 103 vfs_nullop, /* seek */ 104 nfs_remove, /* remove */ 105 nfs_link, /* link */ 106 nfs_rename, /* rename */ 107 nfs_mkdir, /* mkdir */ 108 nfs_rmdir, /* rmdir */ 109 nfs_symlink, /* symlink */ 110 nfs_readdir, /* readdir */ 111 nfs_readlink, /* readlink */ 112 nfs_abortop, /* abortop */ 113 nfs_inactive, /* inactive */ 114 nfs_reclaim, /* reclaim */ 115 nfs_lock, /* lock */ 116 nfs_unlock, /* unlock */ 117 nfs_bmap, /* bmap */ 118 nfs_strategy, /* strategy */ 119 nfs_print, /* print */ 120 nfs_islocked, /* islocked */ 121 }; 122 123 /* Special device vnode ops */ 124 int spec_lookup(), 125 spec_open(), 126 spec_read(), 127 spec_write(), 128 spec_strategy(), 129 spec_bmap(), 130 spec_ioctl(), 131 spec_select(), 132 spec_close(), 133 spec_badop(), 134 spec_nullop(); 135 136 struct vnodeops spec_nfsv2nodeops = { 137 spec_lookup, /* lookup */ 138 spec_badop, /* create */ 139 spec_badop, /* mknod */ 140 spec_open, /* open */ 141 spec_close, /* close */ 142 nfs_access, /* access */ 143 nfs_getattr, /* getattr */ 144 nfs_setattr, /* setattr */ 145 spec_read, /* read */ 146 spec_write, /* write */ 147 spec_ioctl, /* ioctl */ 148 spec_select, /* select */ 149 spec_badop, /* mmap */ 150 spec_nullop, /* fsync */ 151 spec_badop, /* seek */ 152 spec_badop, /* remove */ 153 spec_badop, /* link */ 154 spec_badop, /* rename */ 155 spec_badop, /* mkdir */ 156 spec_badop, /* rmdir */ 157 spec_badop, /* symlink */ 158 spec_badop, /* readdir */ 159 spec_badop, /* readlink */ 160 spec_badop, /* abortop */ 161 nfs_inactive, /* inactive */ 162 nfs_reclaim, /* reclaim */ 163 nfs_lock, /* lock */ 164 nfs_unlock, /* unlock */ 165 spec_bmap, /* bmap */ 166 spec_strategy, /* strategy */ 167 nfs_print, /* print */ 168 nfs_islocked, /* islocked */ 169 }; 170 171 #ifdef FIFO 172 int fifo_lookup(), 173 fifo_open(), 174 fifo_read(), 175 fifo_write(), 176 fifo_bmap(), 177 fifo_ioctl(), 178 fifo_select(), 179 fifo_close(), 180 fifo_print(), 181 fifo_badop(), 182 fifo_nullop(); 183 184 struct vnodeops fifo_nfsv2nodeops = { 185 fifo_lookup, /* lookup */ 186 fifo_badop, /* create */ 187 fifo_badop, /* mknod */ 188 fifo_open, /* open */ 189 fifo_close, /* close */ 190 nfs_access, /* access */ 191 nfs_getattr, /* getattr */ 192 nfs_setattr, /* setattr */ 193 fifo_read, /* read */ 194 fifo_write, /* write */ 195 fifo_ioctl, /* ioctl */ 196 fifo_select, /* select */ 197 fifo_badop, /* mmap */ 198 fifo_nullop, /* fsync */ 199 fifo_badop, /* seek */ 200 fifo_badop, /* remove */ 201 fifo_badop, /* link */ 202 fifo_badop, /* rename */ 203 fifo_badop, /* mkdir */ 204 fifo_badop, /* rmdir */ 205 fifo_badop, /* symlink */ 206 fifo_badop, /* readdir */ 207 fifo_badop, /* readlink */ 208 fifo_badop, /* abortop */ 209 nfs_inactive, /* inactive */ 210 nfs_reclaim, /* reclaim */ 211 nfs_lock, /* lock */ 212 nfs_unlock, /* unlock */ 213 fifo_bmap, /* bmap */ 214 fifo_badop, /* strategy */ 215 nfs_print, /* print */ 216 nfs_islocked, /* islocked */ 217 }; 218 #endif /* FIFO */ 219 220 extern u_long nfs_procids[NFS_NPROCS]; 221 extern u_long nfs_prog, nfs_vers; 222 extern char nfsiobuf[MAXPHYS+NBPG]; 223 extern int nonidempotent[NFS_NPROCS]; 224 struct map nfsmap[NFS_MSIZ]; 225 enum vtype v_type[NFLNK+1]; 226 struct buf nfs_bqueue; /* Queue head for nfsiod's */ 227 int nfs_asyncdaemons = 0; 228 struct proc *nfs_iodwant[MAX_ASYNCDAEMON]; 229 static int nfsmap_want = 0; 230 231 /* 232 * nfs null call from vfs. 233 */ 234 nfs_null(vp, cred) 235 struct vnode *vp; 236 struct ucred *cred; 237 { 238 caddr_t bpos, dpos; 239 u_long xid; 240 int error = 0; 241 struct mbuf *mreq, *mrep, *md, *mb; 242 243 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); 244 nfsm_request(vp, nonidempotent[NFSPROC_NULL]); 245 nfsm_reqdone; 246 return (error); 247 } 248 249 /* 250 * nfs access vnode op. 251 * Essentially just get vattr and then imitate iaccess() 252 */ 253 nfs_access(vp, mode, cred) 254 struct vnode *vp; 255 int mode; 256 register struct ucred *cred; 257 { 258 register struct vattr *vap; 259 register gid_t *gp; 260 struct vattr vattr; 261 register int i; 262 int error; 263 264 /* 265 * If you're the super-user, 266 * you always get access. 267 */ 268 if (cred->cr_uid == 0) 269 return (0); 270 vap = &vattr; 271 if (error = nfs_getattr(vp, vap, cred)) 272 return (error); 273 /* 274 * Access check is based on only one of owner, group, public. 275 * If not owner, then check group. If not a member of the 276 * group, then check public access. 277 */ 278 if (cred->cr_uid != vap->va_uid) { 279 mode >>= 3; 280 gp = cred->cr_groups; 281 for (i = 0; i < cred->cr_ngroups; i++, gp++) 282 if (vap->va_gid == *gp) 283 goto found; 284 mode >>= 3; 285 found: 286 ; 287 } 288 if ((vap->va_mode & mode) != 0) 289 return (0); 290 return (EACCES); 291 } 292 293 /* 294 * nfs open vnode op 295 * Just check to see if the type is ok 296 */ 297 /* ARGSUSED */ 298 nfs_open(vp, mode, cred) 299 struct vnode *vp; 300 int mode; 301 struct ucred *cred; 302 { 303 register enum vtype vtyp; 304 305 vtyp = vp->v_type; 306 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) 307 return (0); 308 else 309 return (EACCES); 310 } 311 312 /* 313 * nfs close vnode op 314 * For reg files, invalidate any buffer cache entries. 315 */ 316 /* ARGSUSED */ 317 nfs_close(vp, fflags, cred) 318 register struct vnode *vp; 319 int fflags; 320 struct ucred *cred; 321 { 322 register struct nfsnode *np = VTONFS(vp); 323 int error = 0; 324 325 if (vp->v_type == VREG && ((np->n_flag & NMODIFIED) || 326 ((np->n_flag & NBUFFERED) && np->n_sillyrename))) { 327 nfs_lock(vp); 328 np->n_flag &= ~(NMODIFIED|NBUFFERED); 329 vinvalbuf(vp, TRUE); 330 if (np->n_flag & NWRITEERR) { 331 np->n_flag &= ~NWRITEERR; 332 error = np->n_error; 333 } 334 nfs_unlock(vp); 335 } 336 return (error); 337 } 338 339 /* 340 * nfs getattr call from vfs. 341 */ 342 nfs_getattr(vp, vap, cred) 343 register struct vnode *vp; 344 struct vattr *vap; 345 struct ucred *cred; 346 { 347 register caddr_t cp; 348 register long t1; 349 caddr_t bpos, dpos; 350 u_long xid; 351 int error = 0; 352 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 353 354 /* First look in the cache.. */ 355 if (nfs_getattrcache(vp, vap) == 0) 356 return (0); 357 nfsstats.rpccnt[NFSPROC_GETATTR]++; 358 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); 359 nfsm_fhtom(vp); 360 nfsm_request(vp, nonidempotent[NFSPROC_GETATTR]); 361 nfsm_loadattr(vp, vap); 362 nfsm_reqdone; 363 return (error); 364 } 365 366 /* 367 * nfs setattr call. 368 */ 369 nfs_setattr(vp, vap, cred) 370 register struct vnode *vp; 371 register struct vattr *vap; 372 struct ucred *cred; 373 { 374 register struct nfsv2_sattr *sp; 375 register caddr_t cp; 376 register long t1; 377 caddr_t bpos, dpos; 378 u_long xid; 379 int error = 0; 380 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 381 struct nfsnode *np; 382 383 nfsstats.rpccnt[NFSPROC_SETATTR]++; 384 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); 385 nfsm_fhtom(vp); 386 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 387 if (vap->va_mode == 0xffff) 388 sp->sa_mode = VNOVAL; 389 else 390 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); 391 if (vap->va_uid == 0xffff) 392 sp->sa_uid = VNOVAL; 393 else 394 sp->sa_uid = txdr_unsigned(vap->va_uid); 395 if (vap->va_gid == 0xffff) 396 sp->sa_gid = VNOVAL; 397 else 398 sp->sa_gid = txdr_unsigned(vap->va_gid); 399 sp->sa_size = txdr_unsigned(vap->va_size); 400 if (vap->va_size != VNOVAL) { 401 np = VTONFS(vp); 402 if (np->n_flag & NMODIFIED) { 403 np->n_flag &= ~NMODIFIED; 404 vinvalbuf(vp, TRUE); 405 } 406 } 407 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); 408 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); 409 txdr_time(&vap->va_mtime, &sp->sa_mtime); 410 nfsm_request(vp, nonidempotent[NFSPROC_SETATTR]); 411 nfsm_loadattr(vp, (struct vattr *)0); 412 /* should we fill in any vap fields ?? */ 413 nfsm_reqdone; 414 return (error); 415 } 416 417 /* 418 * nfs lookup call, one step at a time... 419 * First look in cache 420 * If not found, unlock the directory nfsnode and do the rpc 421 */ 422 nfs_lookup(vp, ndp) 423 register struct vnode *vp; 424 register struct nameidata *ndp; 425 { 426 register struct vnode *vdp; 427 register u_long *p; 428 register caddr_t cp; 429 register long t1, t2; 430 caddr_t bpos, dpos, cp2; 431 u_long xid; 432 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 433 struct vnode *newvp; 434 long len; 435 nfsv2fh_t *fhp; 436 struct nfsnode *np; 437 int lockparent, wantparent, flag, error = 0; 438 439 ndp->ni_dvp = vp; 440 ndp->ni_vp = NULL; 441 if (vp->v_type != VDIR) 442 return (ENOTDIR); 443 lockparent = ndp->ni_nameiop & LOCKPARENT; 444 flag = ndp->ni_nameiop & OPFLAG; 445 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); 446 if ((error = cache_lookup(ndp)) && error != ENOENT) { 447 struct vattr vattr; 448 int vpid; 449 450 if (vp == ndp->ni_rdir && ndp->ni_isdotdot) 451 panic("nfs_lookup: .. through root"); 452 vdp = ndp->ni_vp; 453 vpid = vdp->v_id; 454 /* 455 * See the comment starting `Step through' in ufs/ufs_lookup.c 456 * for an explanation of the locking protocol 457 */ 458 if (vp == vdp) { 459 VREF(vdp); 460 error = 0; 461 } else if (ndp->ni_isdotdot) { 462 nfs_unlock(vp); 463 error = vget(vdp); 464 } else { 465 error = vget(vdp); 466 nfs_unlock(vp); 467 } 468 if (!error) { 469 if (vpid == vdp->v_id) { 470 if (!nfs_getattr(vdp, &vattr, ndp->ni_cred) && 471 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { 472 nfsstats.lookupcache_hits++; 473 return (0); 474 } else { 475 cache_purge(vdp); 476 nfs_nput(vdp); 477 } 478 } else { 479 nfs_nput(vdp); 480 } 481 } 482 ndp->ni_vp = (struct vnode *)0; 483 } else 484 nfs_unlock(vp); 485 error = 0; 486 nfsstats.lookupcache_misses++; 487 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 488 len = ndp->ni_namelen; 489 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 490 nfsm_fhtom(vp); 491 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); 492 nfsm_request(vp, nonidempotent[NFSPROC_LOOKUP]); 493 nfsmout: 494 if (error) { 495 if (lockparent || (flag != CREATE && flag != RENAME) || 496 *ndp->ni_next != 0) 497 nfs_lock(vp); 498 return (ENOENT); 499 } 500 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); 501 502 /* 503 * Handle DELETE and RENAME cases... 504 */ 505 if (flag == DELETE && *ndp->ni_next == 0) { 506 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 507 VREF(vp); 508 newvp = vp; 509 np = VTONFS(vp); 510 } else { 511 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 512 nfs_lock(vp); 513 m_freem(mrep); 514 return (error); 515 } 516 newvp = NFSTOV(np); 517 } 518 if (error = 519 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 520 nfs_lock(vp); 521 if (newvp != vp) 522 nfs_nput(newvp); 523 else 524 vrele(vp); 525 m_freem(mrep); 526 return (error); 527 } 528 ndp->ni_vp = newvp; 529 if (lockparent || vp == newvp) 530 nfs_lock(vp); 531 m_freem(mrep); 532 return (0); 533 } 534 535 if (flag == RENAME && wantparent && *ndp->ni_next == 0) { 536 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 537 nfs_lock(vp); 538 m_freem(mrep); 539 return (EISDIR); 540 } 541 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 542 nfs_lock(vp); 543 m_freem(mrep); 544 return (error); 545 } 546 newvp = NFSTOV(np); 547 if (error = 548 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 549 nfs_lock(vp); 550 nfs_nput(newvp); 551 m_freem(mrep); 552 return (error); 553 } 554 ndp->ni_vp = newvp; 555 if (lockparent) 556 nfs_lock(vp); 557 return (0); 558 } 559 560 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { 561 VREF(vp); 562 newvp = vp; 563 np = VTONFS(vp); 564 } else if (ndp->ni_isdotdot) { 565 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 566 nfs_lock(vp); 567 m_freem(mrep); 568 return (error); 569 } 570 newvp = NFSTOV(np); 571 } else { 572 if (error = nfs_nget(vp->v_mount, fhp, &np)) { 573 nfs_lock(vp); 574 m_freem(mrep); 575 return (error); 576 } 577 newvp = NFSTOV(np); 578 } 579 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { 580 nfs_lock(vp); 581 if (newvp != vp) 582 nfs_nput(newvp); 583 else 584 vrele(vp); 585 m_freem(mrep); 586 return (error); 587 } 588 m_freem(mrep); 589 590 if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) 591 nfs_lock(vp); 592 ndp->ni_vp = newvp; 593 if (error == 0 && ndp->ni_makeentry) { 594 np->n_ctime = np->n_vattr.va_ctime.tv_sec; 595 cache_enter(ndp); 596 } 597 return (error); 598 } 599 600 /* 601 * nfs readlink call 602 */ 603 nfs_readlink(vp, uiop, cred) 604 register struct vnode *vp; 605 struct uio *uiop; 606 struct ucred *cred; 607 { 608 register u_long *p; 609 register caddr_t cp; 610 register long t1; 611 caddr_t bpos, dpos, cp2; 612 u_long xid; 613 int error = 0; 614 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 615 long len; 616 617 nfsstats.rpccnt[NFSPROC_READLINK]++; 618 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); 619 nfsm_fhtom(vp); 620 nfsm_request(vp, nonidempotent[NFSPROC_READLINK]); 621 nfsm_strsiz(len, NFS_MAXPATHLEN); 622 nfsm_mtouio(uiop, len); 623 nfsm_reqdone; 624 return (error); 625 } 626 627 /* 628 * nfs read call 629 */ 630 nfs_readrpc(vp, uiop, cred) 631 register struct vnode *vp; 632 struct uio *uiop; 633 struct ucred *cred; 634 { 635 register u_long *p; 636 register caddr_t cp; 637 register long t1; 638 caddr_t bpos, dpos, cp2; 639 u_long xid; 640 int error = 0; 641 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 642 struct nfsmount *nmp; 643 long len, retlen, tsiz; 644 645 nmp = vfs_to_nfs(vp->v_mount); 646 tsiz = uiop->uio_resid; 647 while (tsiz > 0) { 648 nfsstats.rpccnt[NFSPROC_READ]++; 649 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 650 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); 651 nfsm_fhtom(vp); 652 nfsm_build(p, u_long *, NFSX_UNSIGNED*3); 653 *p++ = txdr_unsigned(uiop->uio_offset); 654 *p++ = txdr_unsigned(len); 655 *p = 0; 656 nfsm_request(vp, nonidempotent[NFSPROC_READ]); 657 nfsm_loadattr(vp, (struct vattr *)0); 658 nfsm_strsiz(retlen, nmp->nm_rsize); 659 nfsm_mtouio(uiop, retlen); 660 m_freem(mrep); 661 if (retlen < len) 662 tsiz = 0; 663 else 664 tsiz -= len; 665 } 666 nfsmout: 667 return (error); 668 } 669 670 /* 671 * nfs write call 672 */ 673 nfs_writerpc(vp, uiop, cred) 674 register struct vnode *vp; 675 struct uio *uiop; 676 struct ucred *cred; 677 { 678 register u_long *p; 679 register caddr_t cp; 680 register long t1; 681 caddr_t bpos, dpos; 682 u_long xid; 683 int error = 0; 684 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 685 struct nfsmount *nmp; 686 long len, tsiz; 687 688 nmp = vfs_to_nfs(vp->v_mount); 689 tsiz = uiop->uio_resid; 690 while (tsiz > 0) { 691 nfsstats.rpccnt[NFSPROC_WRITE]++; 692 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; 693 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, 694 NFSX_FH+NFSX_UNSIGNED*4); 695 nfsm_fhtom(vp); 696 nfsm_build(p, u_long *, NFSX_UNSIGNED*4); 697 *(p+1) = txdr_unsigned(uiop->uio_offset); 698 *(p+3) = txdr_unsigned(len); 699 nfsm_uiotom(uiop, len); 700 nfsm_request(vp, nonidempotent[NFSPROC_WRITE]); 701 nfsm_loadattr(vp, (struct vattr *)0); 702 m_freem(mrep); 703 tsiz -= len; 704 } 705 nfsmout: 706 return (error); 707 } 708 709 /* 710 * nfs mknod call 711 * This call is currently not supported. 712 */ 713 /* ARGSUSED */ 714 nfs_mknod(ndp, vap, cred) 715 struct nameidata *ndp; 716 struct ucred *cred; 717 struct vattr *vap; 718 { 719 720 nfs_abortop(ndp); 721 return (EOPNOTSUPP); 722 } 723 724 /* 725 * nfs file create call 726 */ 727 nfs_create(ndp, vap) 728 register struct nameidata *ndp; 729 register struct vattr *vap; 730 { 731 register struct nfsv2_sattr *sp; 732 register u_long *p; 733 register caddr_t cp; 734 register long t1, t2; 735 caddr_t bpos, dpos, cp2; 736 u_long xid; 737 int error = 0; 738 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 739 740 nfsstats.rpccnt[NFSPROC_CREATE]++; 741 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, 742 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 743 nfsm_fhtom(ndp->ni_dvp); 744 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 745 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 746 sp->sa_mode = vtonfs_mode(VREG, vap->va_mode); 747 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 748 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 749 sp->sa_size = txdr_unsigned(0); 750 /* or should these be VNOVAL ?? */ 751 txdr_time(&vap->va_atime, &sp->sa_atime); 752 txdr_time(&vap->va_mtime, &sp->sa_mtime); 753 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_CREATE]); 754 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 755 nfsm_reqdone; 756 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 757 nfs_nput(ndp->ni_dvp); 758 return (error); 759 } 760 761 /* 762 * nfs file remove call 763 * To try and make nfs semantics closer to vfs semantics, a file that has 764 * other references to the vnode is renamed instead of removed and then 765 * removed later on the last close. 766 * Unfortunately you must flush the buffer cache and cmap to get rid of 767 * all extraneous vnode references before you check the reference cnt. 768 * 1 - If the file could have blocks in the buffer cache 769 * flush them out and invalidate them 770 * mpurge the vnode to flush out cmap references 771 * (This is necessary to update the vnode ref cnt as well as sensible 772 * for actual removes, to free up the buffers) 773 * 2 - If v_usecount > 1 774 * If a rename is not already in the works 775 * call nfs_sillyrename() to set it up 776 * else 777 * do the remove rpc 778 */ 779 nfs_remove(ndp) 780 register struct nameidata *ndp; 781 { 782 register struct vnode *vp = ndp->ni_vp; 783 register struct nfsnode *np = VTONFS(ndp->ni_vp); 784 register u_long *p; 785 register caddr_t cp; 786 register long t1, t2; 787 caddr_t bpos, dpos; 788 u_long xid; 789 int error = 0; 790 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 791 792 if (vp->v_type == VREG) { 793 if (np->n_flag & (NMODIFIED|NBUFFERED)) { 794 np->n_flag &= ~(NMODIFIED|NBUFFERED); 795 vinvalbuf(vp, TRUE); 796 } 797 if (np->n_flag & NPAGEDON) { 798 np->n_flag &= ~NPAGEDON; 799 mpurge(vp); /* In case cmap entries still ref it */ 800 } 801 } 802 if (vp->v_usecount > 1) { 803 if (!np->n_sillyrename) 804 error = nfs_sillyrename(ndp, REMOVE); 805 } else { 806 nfsstats.rpccnt[NFSPROC_REMOVE]++; 807 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 808 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 809 nfsm_fhtom(ndp->ni_dvp); 810 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 811 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_REMOVE]); 812 nfsm_reqdone; 813 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 814 /* 815 * Kludge City: If the first reply to the remove rpc is lost.. 816 * the reply to the retransmitted request will be ENOENT 817 * since the file was in fact removed 818 * Therefore, we cheat and return success. 819 */ 820 if (error == ENOENT) 821 error = 0; 822 } 823 np->n_attrstamp = 0; 824 if (ndp->ni_dvp == vp) 825 vrele(vp); 826 else 827 nfs_nput(ndp->ni_dvp); 828 nfs_nput(vp); 829 return (error); 830 } 831 832 /* 833 * nfs file remove rpc called from nfs_inactive 834 */ 835 nfs_removeit(ndp) 836 register struct nameidata *ndp; 837 { 838 register u_long *p; 839 register caddr_t cp; 840 register long t1, t2; 841 caddr_t bpos, dpos; 842 u_long xid; 843 int error = 0; 844 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 845 846 nfsstats.rpccnt[NFSPROC_REMOVE]++; 847 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, 848 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 849 nfsm_fhtom(ndp->ni_dvp); 850 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 851 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_REMOVE]); 852 nfsm_reqdone; 853 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 854 return (error); 855 } 856 857 /* 858 * nfs file rename call 859 */ 860 nfs_rename(sndp, tndp) 861 register struct nameidata *sndp, *tndp; 862 { 863 register u_long *p; 864 register caddr_t cp; 865 register long t1, t2; 866 caddr_t bpos, dpos; 867 u_long xid; 868 int error = 0; 869 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 870 871 nfsstats.rpccnt[NFSPROC_RENAME]++; 872 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 873 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 874 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 875 nfsm_fhtom(sndp->ni_dvp); 876 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 877 nfsm_fhtom(tndp->ni_dvp); 878 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 879 nfsm_request(sndp->ni_dvp, nonidempotent[NFSPROC_RENAME]); 880 nfsm_reqdone; 881 VTONFS(sndp->ni_dvp)->n_direofstamp = 0; 882 VTONFS(tndp->ni_dvp)->n_direofstamp = 0; 883 if (sndp->ni_vp->v_type == VDIR) { 884 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) 885 cache_purge(tndp->ni_dvp); 886 cache_purge(sndp->ni_dvp); 887 } 888 nfs_abortop(sndp); 889 nfs_abortop(tndp); 890 /* 891 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 892 */ 893 if (error == ENOENT) 894 error = 0; 895 return (error); 896 } 897 898 /* 899 * nfs file rename rpc called from above 900 */ 901 nfs_renameit(sndp, tndp) 902 register struct nameidata *sndp, *tndp; 903 { 904 register u_long *p; 905 register caddr_t cp; 906 register long t1, t2; 907 caddr_t bpos, dpos; 908 u_long xid; 909 int error = 0; 910 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 911 912 nfsstats.rpccnt[NFSPROC_RENAME]++; 913 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, 914 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+ 915 nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/ 916 nfsm_fhtom(sndp->ni_dvp); 917 nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 918 nfsm_fhtom(tndp->ni_dvp); 919 nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN); 920 nfsm_request(sndp->ni_dvp, nonidempotent[NFSPROC_RENAME]); 921 nfsm_reqdone; 922 VTONFS(sndp->ni_dvp)->n_direofstamp = 0; 923 VTONFS(tndp->ni_dvp)->n_direofstamp = 0; 924 return (error); 925 } 926 927 /* 928 * nfs hard link create call 929 */ 930 nfs_link(vp, ndp) 931 register struct vnode *vp; 932 register struct nameidata *ndp; 933 { 934 register u_long *p; 935 register caddr_t cp; 936 register long t1, t2; 937 caddr_t bpos, dpos; 938 u_long xid; 939 int error = 0; 940 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 941 942 if (ndp->ni_dvp != vp) 943 nfs_lock(vp); 944 nfsstats.rpccnt[NFSPROC_LINK]++; 945 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, 946 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 947 nfsm_fhtom(vp); 948 nfsm_fhtom(ndp->ni_dvp); 949 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 950 nfsm_request(vp, nonidempotent[NFSPROC_LINK]); 951 nfsm_reqdone; 952 VTONFS(vp)->n_attrstamp = 0; 953 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 954 if (ndp->ni_dvp != vp) 955 nfs_unlock(vp); 956 nfs_nput(ndp->ni_dvp); 957 /* 958 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 959 */ 960 if (error == EEXIST) 961 error = 0; 962 return (error); 963 } 964 965 /* 966 * nfs symbolic link create call 967 */ 968 nfs_symlink(ndp, vap, nm) 969 struct nameidata *ndp; 970 struct vattr *vap; 971 char *nm; /* is this the path ?? */ 972 { 973 register struct nfsv2_sattr *sp; 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_SYMLINK]++; 983 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, 984 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED); 985 nfsm_fhtom(ndp->ni_dvp); 986 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 987 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); 988 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 989 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); 990 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); 991 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); 992 sp->sa_size = txdr_unsigned(VNOVAL); 993 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ 994 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ 995 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_SYMLINK]); 996 nfsm_reqdone; 997 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 998 nfs_nput(ndp->ni_dvp); 999 /* 1000 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1001 */ 1002 if (error == EEXIST) 1003 error = 0; 1004 return (error); 1005 } 1006 1007 /* 1008 * nfs make dir call 1009 */ 1010 nfs_mkdir(ndp, vap) 1011 register struct nameidata *ndp; 1012 struct vattr *vap; 1013 { 1014 register struct nfsv2_sattr *sp; 1015 register u_long *p; 1016 register caddr_t cp; 1017 register long t1, t2; 1018 caddr_t bpos, dpos, cp2; 1019 u_long xid; 1020 int error = 0; 1021 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1022 1023 nfsstats.rpccnt[NFSPROC_MKDIR]++; 1024 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, 1025 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR); 1026 nfsm_fhtom(ndp->ni_dvp); 1027 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1028 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); 1029 sp->sa_mode = vtonfs_mode(VDIR, 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, nonidempotent[NFSPROC_MKDIR]); 1036 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); 1037 nfsm_reqdone; 1038 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 1039 nfs_nput(ndp->ni_dvp); 1040 /* 1041 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry. 1042 */ 1043 if (error == EEXIST) 1044 error = 0; 1045 return (error); 1046 } 1047 1048 /* 1049 * nfs remove directory call 1050 */ 1051 nfs_rmdir(ndp) 1052 register struct nameidata *ndp; 1053 { 1054 register u_long *p; 1055 register caddr_t cp; 1056 register long t1, t2; 1057 caddr_t bpos, dpos; 1058 u_long xid; 1059 int error = 0; 1060 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1061 1062 if (ndp->ni_dvp == ndp->ni_vp) { 1063 vrele(ndp->ni_dvp); 1064 nfs_nput(ndp->ni_dvp); 1065 return (EINVAL); 1066 } 1067 nfsstats.rpccnt[NFSPROC_RMDIR]++; 1068 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, 1069 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)); 1070 nfsm_fhtom(ndp->ni_dvp); 1071 nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN); 1072 nfsm_request(ndp->ni_dvp, nonidempotent[NFSPROC_RMDIR]); 1073 nfsm_reqdone; 1074 VTONFS(ndp->ni_dvp)->n_direofstamp = 0; 1075 cache_purge(ndp->ni_dvp); 1076 cache_purge(ndp->ni_vp); 1077 nfs_nput(ndp->ni_vp); 1078 nfs_nput(ndp->ni_dvp); 1079 /* 1080 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 1081 */ 1082 if (error == ENOENT) 1083 error = 0; 1084 return (error); 1085 } 1086 1087 /* 1088 * nfs readdir call 1089 * Although cookie is defined as opaque, I translate it to/from net byte 1090 * order so that it looks more sensible. This appears consistent with the 1091 * Ultrix implementation of NFS. 1092 */ 1093 nfs_readdir(vp, uiop, cred, eofflagp) 1094 register struct vnode *vp; 1095 struct uio *uiop; 1096 struct ucred *cred; 1097 int *eofflagp; 1098 { 1099 register long len; 1100 register struct direct *dp; 1101 register u_long *p; 1102 register caddr_t cp; 1103 register long t1; 1104 long tlen; 1105 caddr_t bpos, dpos, cp2; 1106 u_long xid; 1107 int error = 0; 1108 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1109 struct mbuf *md2; 1110 caddr_t dpos2; 1111 int siz; 1112 int more_dirs = 1; 1113 off_t off, savoff; 1114 struct direct *savdp; 1115 struct nfsmount *nmp; 1116 struct nfsnode *np = VTONFS(vp); 1117 long tresid; 1118 1119 /* 1120 * First, check for hit on the EOF offset cache 1121 */ 1122 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && 1123 (time.tv_sec - np->n_direofstamp) < NFS_ATTRTIMEO) { 1124 *eofflagp = 1; 1125 nfsstats.direofcache_hits++; 1126 return (0); 1127 } 1128 1129 nmp = vfs_to_nfs(vp->v_mount); 1130 tresid = uiop->uio_resid; 1131 /* 1132 * Loop around doing readdir rpc's of size uio_resid or nm_rsize, 1133 * whichever is smaller, truncated to a multiple of DIRBLKSIZ. 1134 * The stopping criteria is EOF or less than DIRBLKSIZ of the 1135 * request left. 1136 */ 1137 while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) { 1138 nfsstats.rpccnt[NFSPROC_READDIR]++; 1139 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); 1140 nfsm_fhtom(vp); 1141 nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); 1142 *p++ = txdr_unsigned(uiop->uio_offset); 1143 *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? 1144 nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1)); 1145 nfsm_request(vp, nonidempotent[NFSPROC_READDIR]); 1146 siz = 0; 1147 nfsm_disect(p, u_long *, NFSX_UNSIGNED); 1148 more_dirs = fxdr_unsigned(int, *p); 1149 1150 /* Save the position so that we can do nfsm_mtouio() later */ 1151 dpos2 = dpos; 1152 md2 = md; 1153 1154 /* loop thru the dir entries, doctoring them to 4bsd form */ 1155 savoff = off = 0; 1156 savdp = dp = NULL; 1157 while (more_dirs && siz < uiop->uio_resid) { 1158 savoff = off; /* Hold onto offset and dp */ 1159 savdp = dp; 1160 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1161 dp = (struct direct *)p; 1162 dp->d_ino = fxdr_unsigned(u_long, *p++); 1163 len = fxdr_unsigned(int, *p); 1164 if (len <= 0 || len > NFS_MAXNAMLEN) { 1165 error = EBADRPC; 1166 m_freem(mrep); 1167 goto nfsmout; 1168 } 1169 dp->d_namlen = (u_short)len; 1170 nfsm_adv(len); /* Point past name */ 1171 tlen = nfsm_rndup(len); 1172 /* 1173 * This should not be necessary, but some servers have 1174 * broken XDR such that these bytes are not null filled. 1175 */ 1176 if (tlen != len) { 1177 *dpos = '\0'; /* Null-terminate */ 1178 nfsm_adv(tlen - len); 1179 len = tlen; 1180 } 1181 nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED); 1182 off = fxdr_unsigned(off_t, *p); 1183 *p++ = 0; /* Ensures null termination of name */ 1184 more_dirs = fxdr_unsigned(int, *p); 1185 dp->d_reclen = len+4*NFSX_UNSIGNED; 1186 siz += dp->d_reclen; 1187 } 1188 /* 1189 * If at end of rpc data, get the eof boolean 1190 */ 1191 if (!more_dirs) { 1192 nfsm_disecton(p, u_long *, NFSX_UNSIGNED); 1193 more_dirs = (fxdr_unsigned(int, *p) == 0); 1194 1195 /* 1196 * If at EOF, cache directory offset 1197 */ 1198 if (!more_dirs) { 1199 np->n_direofoffset = off; 1200 np->n_direofstamp = time.tv_sec; 1201 } 1202 } 1203 /* 1204 * If there is too much to fit in the data buffer, use savoff and 1205 * savdp to trim off the last record. 1206 * --> we are not at eof 1207 */ 1208 if (siz > uiop->uio_resid) { 1209 off = savoff; 1210 siz -= dp->d_reclen; 1211 dp = savdp; 1212 more_dirs = 0; /* Paranoia */ 1213 } 1214 if (siz > 0) { 1215 md = md2; 1216 dpos = dpos2; 1217 nfsm_mtouio(uiop, siz); 1218 uiop->uio_offset = off; 1219 } else 1220 more_dirs = 0; /* Ugh, never happens, but in case.. */ 1221 m_freem(mrep); 1222 } 1223 nfsmout: 1224 if (tresid == uiop->uio_resid) { 1225 *eofflagp = 1; 1226 nfsstats.direofcache_misses++; 1227 } else { 1228 *eofflagp = 0; 1229 } 1230 return (error); 1231 } 1232 1233 /* 1234 * nfs statfs call 1235 * (Actually a vfsop, not a vnode op) 1236 */ 1237 nfs_statfs(mp, sbp) 1238 struct mount *mp; 1239 register struct statfs *sbp; 1240 { 1241 register struct vnode *vp; 1242 register struct nfsv2_statfs *sfp; 1243 register caddr_t cp; 1244 register long t1; 1245 caddr_t bpos, dpos, cp2; 1246 u_long xid; 1247 int error = 0; 1248 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1249 struct nfsmount *nmp; 1250 struct ucred *cred; 1251 struct nfsnode *np; 1252 1253 nmp = vfs_to_nfs(mp); 1254 if (error = nfs_nget(mp, &nmp->nm_fh, &np)) 1255 return (error); 1256 vp = NFSTOV(np); 1257 nfsstats.rpccnt[NFSPROC_STATFS]++; 1258 cred = crget(); 1259 cred->cr_ngroups = 1; 1260 nfsm_reqhead(nfs_procids[NFSPROC_STATFS], cred, NFSX_FH); 1261 nfsm_fhtom(vp); 1262 nfsm_request(vp, nonidempotent[NFSPROC_STATFS]); 1263 nfsm_disect(sfp, struct nfsv2_statfs *, NFSX_STATFS); 1264 sbp->f_type = MOUNT_NFS; 1265 sbp->f_flags = nmp->nm_flag; 1266 sbp->f_bsize = fxdr_unsigned(long, sfp->sf_tsize); 1267 sbp->f_fsize = fxdr_unsigned(long, sfp->sf_bsize); 1268 sbp->f_blocks = fxdr_unsigned(long, sfp->sf_blocks); 1269 sbp->f_bfree = fxdr_unsigned(long, sfp->sf_bfree); 1270 sbp->f_bavail = fxdr_unsigned(long, sfp->sf_bavail); 1271 sbp->f_files = 0; 1272 sbp->f_ffree = 0; 1273 if (sbp != &mp->m_stat) { 1274 bcopy(mp->m_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 1275 bcopy(mp->m_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 1276 } 1277 nfsm_reqdone; 1278 nfs_nput(vp); 1279 crfree(cred); 1280 return (error); 1281 } 1282 1283 static char hextoasc[] = "0123456789abcdef"; 1284 1285 /* 1286 * Silly rename. To make the NFS filesystem that is stateless look a little 1287 * more like the "ufs" a remove of an active vnode is translated to a rename 1288 * to a funny looking filename that is removed by nfs_inactive on the 1289 * nfsnode. There is the potential for another process on a different client 1290 * to create the same funny name between the nfs_lookitup() fails and the 1291 * nfs_rename() completes, but... 1292 */ 1293 nfs_sillyrename(ndp, flag) 1294 register struct nameidata *ndp; 1295 int flag; 1296 { 1297 register struct nfsnode *np; 1298 register struct sillyrename *sp; 1299 register struct nameidata *tndp; 1300 int error; 1301 short pid; 1302 1303 np = VTONFS(ndp->ni_dvp); 1304 cache_purge(ndp->ni_dvp); 1305 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 1306 M_TEMP, M_WAITOK); 1307 sp->s_flag = flag; 1308 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); 1309 np = VTONFS(ndp->ni_vp); 1310 tndp = &sp->s_namei; 1311 tndp->ni_cred = crdup(ndp->ni_cred); 1312 1313 /* Fudge together a funny name */ 1314 pid = u.u_procp->p_pid; 1315 bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13); 1316 tndp->ni_dent.d_namlen = 12; 1317 tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf]; 1318 tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf]; 1319 tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf]; 1320 tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf]; 1321 1322 /* Try lookitups until we get one that isn't there */ 1323 while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) { 1324 tndp->ni_dent.d_name[4]++; 1325 if (tndp->ni_dent.d_name[4] > 'z') { 1326 error = EINVAL; 1327 goto bad; 1328 } 1329 } 1330 if (error = nfs_renameit(ndp, tndp)) 1331 goto bad; 1332 nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh); 1333 np->n_sillyrename = sp; 1334 return (0); 1335 bad: 1336 crfree(tndp->ni_cred); 1337 free((caddr_t)sp, M_TEMP); 1338 return (error); 1339 } 1340 1341 /* 1342 * Look up a file name for silly rename stuff. 1343 * Just like nfs_lookup() except that it doesn't load returned values 1344 * into the nfsnode table. 1345 * If fhp != NULL it copies the returned file handle out 1346 */ 1347 nfs_lookitup(vp, ndp, fhp) 1348 register struct vnode *vp; 1349 register struct nameidata *ndp; 1350 nfsv2fh_t *fhp; 1351 { 1352 register u_long *p; 1353 register caddr_t cp; 1354 register long t1, t2; 1355 caddr_t bpos, dpos, cp2; 1356 u_long xid; 1357 int error = 0; 1358 struct mbuf *mreq, *mrep, *md, *mb, *mb2; 1359 long len; 1360 1361 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 1362 ndp->ni_dvp = vp; 1363 ndp->ni_vp = NULL; 1364 len = ndp->ni_dent.d_namlen; 1365 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); 1366 nfsm_fhtom(vp); 1367 nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN); 1368 nfsm_request(vp, nonidempotent[NFSPROC_LOOKUP]); 1369 if (fhp != NULL) { 1370 nfsm_disect(cp, caddr_t, NFSX_FH); 1371 bcopy(cp, (caddr_t)fhp, NFSX_FH); 1372 } 1373 nfsm_reqdone; 1374 return (error); 1375 } 1376 1377 /* 1378 * Kludge City.. 1379 * - make nfs_bmap() essentially a no-op that does no translation 1380 * - do nfs_strategy() by faking physical I/O with nfs_readit/nfs_writeit 1381 * after mapping the physical addresses into Kernel Virtual space in the 1382 * nfsiobuf area. 1383 * (Maybe I could use the process's page mapping, but I was concerned that 1384 * Kernel Write might not be enabled and also figured copyout() would do 1385 * a lot more work than bcopy() and also it currently happens in the 1386 * context of the swapper process (2). 1387 */ 1388 nfs_bmap(vp, bn, vpp, bnp) 1389 struct vnode *vp; 1390 daddr_t bn; 1391 struct vnode **vpp; 1392 daddr_t *bnp; 1393 { 1394 if (vpp != NULL) 1395 *vpp = vp; 1396 if (bnp != NULL) 1397 *bnp = bn * btodb(vp->v_mount->m_stat.f_bsize); 1398 return (0); 1399 } 1400 1401 /* 1402 * Strategy routine for phys. i/o 1403 * If the biod's are running, queue a request 1404 * otherwise just call nfs_doio() to get it done 1405 */ 1406 nfs_strategy(bp) 1407 register struct buf *bp; 1408 { 1409 register struct buf *dp; 1410 register int i; 1411 struct proc *rp; 1412 int error = 0; 1413 int fnd = 0; 1414 1415 /* 1416 * If an i/o daemon is waiting 1417 * queue the request, wake it up and wait for completion 1418 * otherwise just do it ourselves 1419 */ 1420 for (i = 0; i < nfs_asyncdaemons; i++) { 1421 if (rp = nfs_iodwant[i]) { 1422 /* 1423 * Ensure that the async_daemon is still waiting here 1424 */ 1425 if (rp->p_stat != SSLEEP || 1426 rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) { 1427 nfs_iodwant[i] = (struct proc *)0; 1428 continue; 1429 } 1430 dp = &nfs_bqueue; 1431 if (dp->b_actf == NULL) { 1432 dp->b_actl = bp; 1433 bp->b_actf = dp; 1434 } else { 1435 dp->b_actf->b_actl = bp; 1436 bp->b_actf = dp->b_actf; 1437 } 1438 dp->b_actf = bp; 1439 bp->b_actl = dp; 1440 fnd++; 1441 nfs_iodwant[i] = (struct proc *)0; 1442 wakeup((caddr_t)&nfs_iodwant[i]); 1443 break; 1444 } 1445 } 1446 if (!fnd) 1447 error = nfs_doio(bp); 1448 return (error); 1449 } 1450 1451 /* 1452 * Fun and games with i/o 1453 * Essentially play ubasetup() and disk interrupt service routine by 1454 * mapping the data buffer into kernel virtual space and doing the 1455 * nfs read or write rpc's from it. 1456 * If the biod's are not running, this is just called from nfs_strategy(), 1457 * otherwise it is called by the biod's to do what would normally be 1458 * partially disk interrupt driven. 1459 */ 1460 nfs_doio(bp) 1461 register struct buf *bp; 1462 { 1463 register struct pte *pte, *ppte; 1464 register caddr_t vaddr; 1465 register struct uio *uiop; 1466 register struct vnode *vp; 1467 struct nfsnode *np; 1468 struct ucred *cr; 1469 int npf, npf2; 1470 int reg; 1471 caddr_t vbase; 1472 unsigned v; 1473 struct proc *rp; 1474 int o, error; 1475 struct uio uio; 1476 struct iovec io; 1477 1478 vp = bp->b_vp; 1479 np = VTONFS(vp); 1480 uiop = &uio; 1481 uiop->uio_iov = &io; 1482 uiop->uio_iovcnt = 1; 1483 uiop->uio_segflg = UIO_SYSSPACE; 1484 1485 /* 1486 * For phys i/o, map the b_addr into kernel virtual space using 1487 * the Nfsiomap pte's 1488 * Also, add a temporary b_rcred for reading using the process's uid 1489 * and a guess at a group 1490 */ 1491 if (bp->b_flags & B_PHYS) { 1492 np->n_flag |= NPAGEDON; 1493 bp->b_rcred = cr = crget(); 1494 rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc; 1495 cr->cr_uid = rp->p_uid; 1496 cr->cr_gid = 0; /* Anything ?? */ 1497 cr->cr_ngroups = 1; 1498 o = (int)bp->b_un.b_addr & PGOFSET; 1499 npf2 = npf = btoc(bp->b_bcount + o); 1500 1501 /* 1502 * Get some mapping page table entries 1503 */ 1504 while ((reg = rmalloc(nfsmap, (long)npf)) == 0) { 1505 nfsmap_want++; 1506 sleep((caddr_t)&nfsmap_want, PZERO-1); 1507 } 1508 reg--; 1509 if (bp->b_flags & B_PAGET) 1510 pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)]; 1511 else { 1512 v = btop(bp->b_un.b_addr); 1513 if (bp->b_flags & B_UAREA) 1514 pte = &rp->p_addr[v]; 1515 else 1516 pte = vtopte(rp, v); 1517 } 1518 1519 /* 1520 * Play vmaccess() but with the Nfsiomap page table 1521 */ 1522 ppte = &Nfsiomap[reg]; 1523 vbase = vaddr = &nfsiobuf[reg*NBPG]; 1524 while (npf != 0) { 1525 mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW)); 1526 #if defined(tahoe) 1527 mtpr(P1DC, vaddr); 1528 #endif 1529 ppte++; 1530 pte++; 1531 vaddr += NBPG; 1532 --npf; 1533 } 1534 1535 /* 1536 * And do the i/o rpc 1537 */ 1538 io.iov_base = vbase+o; 1539 io.iov_len = uiop->uio_resid = bp->b_bcount; 1540 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1541 if (bp->b_flags & B_READ) { 1542 uiop->uio_rw = UIO_READ; 1543 nfsstats.read_physios++; 1544 bp->b_error = error = nfs_readrpc(vp, uiop, bp->b_rcred); 1545 /* 1546 * If a text file has been modified since it was exec'd 1547 * blow the process' out of the water. This is the 1548 * closest we can come to "Text File Busy" in good old 1549 * stateless nfs. 1550 */ 1551 if ((vp->v_flag & VTEXT) && 1552 (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec)) 1553 xinval(vp); 1554 } else { 1555 uiop->uio_rw = UIO_WRITE; 1556 nfsstats.write_physios++; 1557 bp->b_error = error = nfs_writerpc(vp, uiop, bp->b_wcred); 1558 } 1559 1560 /* 1561 * Finally, release pte's used by physical i/o 1562 */ 1563 crfree(cr); 1564 rmfree(nfsmap, (long)npf2, (long)++reg); 1565 if (nfsmap_want) { 1566 nfsmap_want = 0; 1567 wakeup((caddr_t)&nfsmap_want); 1568 } 1569 } else { 1570 if (bp->b_flags & B_READ) { 1571 io.iov_len = uiop->uio_resid = bp->b_bcount; 1572 uiop->uio_offset = bp->b_blkno * DEV_BSIZE; 1573 io.iov_base = bp->b_un.b_addr; 1574 uiop->uio_rw = UIO_READ; 1575 nfsstats.read_bios++; 1576 bp->b_error = error = nfs_readrpc(vp, uiop, bp->b_rcred); 1577 } else { 1578 io.iov_len = uiop->uio_resid = bp->b_dirtyend 1579 - bp->b_dirtyoff; 1580 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) 1581 + bp->b_dirtyoff; 1582 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; 1583 uiop->uio_rw = UIO_WRITE; 1584 nfsstats.write_bios++; 1585 bp->b_error = error = nfs_writerpc(vp, uiop, bp->b_wcred); 1586 if (error) { 1587 np->n_error = error; 1588 np->n_flag |= NWRITEERR; 1589 } 1590 bp->b_dirtyoff = bp->b_dirtyend = 0; 1591 } 1592 } 1593 if (error) 1594 bp->b_flags |= B_ERROR; 1595 bp->b_resid = uiop->uio_resid; 1596 biodone(bp); 1597 return (error); 1598 } 1599 1600 /* 1601 * Flush all the blocks associated with a vnode. 1602 * Walk through the buffer pool and push any dirty pages 1603 * associated with the vnode. 1604 */ 1605 /* ARGSUSED */ 1606 nfs_fsync(vp, fflags, cred, waitfor) 1607 register struct vnode *vp; 1608 int fflags; 1609 struct ucred *cred; 1610 int waitfor; 1611 { 1612 register struct nfsnode *np = VTONFS(vp); 1613 int error = 0; 1614 1615 if (np->n_flag & NMODIFIED) { 1616 np->n_flag &= ~NMODIFIED; 1617 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); 1618 } 1619 if (!error && (np->n_flag & NWRITEERR)) 1620 error = np->n_error; 1621 return (error); 1622 } 1623 1624 /* 1625 * Print out the contents of an nfsnode. 1626 */ 1627 nfs_print(vp) 1628 struct vnode *vp; 1629 { 1630 register struct nfsnode *np = VTONFS(vp); 1631 1632 printf("tag VT_NFS, fileid %d fsid 0x%x", 1633 np->n_vattr.va_fileid, np->n_vattr.va_fsid); 1634 #ifdef FIFO 1635 if (vp->v_type == VFIFO) 1636 fifo_printinfo(vp); 1637 #endif /* FIFO */ 1638 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); 1639 if (np->n_lockholder == 0) 1640 return; 1641 printf("\towner pid %d", np->n_lockholder); 1642 if (np->n_lockwaiter) 1643 printf(" waiting pid %d", np->n_lockwaiter); 1644 printf("\n"); 1645 } 1646