1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed 6 * to Berkeley by John Heidemann of the UCLA Ficus project. 7 * 8 * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/bio.h> 41 #include <sys/buf.h> 42 #include <sys/conf.h> 43 #include <sys/kernel.h> 44 #include <sys/limits.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mount.h> 48 #include <sys/mutex.h> 49 #include <sys/unistd.h> 50 #include <sys/vnode.h> 51 #include <sys/poll.h> 52 53 #include <vm/vm.h> 54 #include <vm/vm_object.h> 55 #include <vm/vm_extern.h> 56 #include <vm/pmap.h> 57 #include <vm/vm_map.h> 58 #include <vm/vm_page.h> 59 #include <vm/vm_pager.h> 60 #include <vm/vnode_pager.h> 61 62 static int vop_nolookup(struct vop_lookup_args *); 63 static int vop_nostrategy(struct vop_strategy_args *); 64 65 /* 66 * This vnode table stores what we want to do if the filesystem doesn't 67 * implement a particular VOP. 68 * 69 * If there is no specific entry here, we will return EOPNOTSUPP. 70 * 71 */ 72 73 vop_t **default_vnodeop_p; 74 static struct vnodeopv_entry_desc default_vnodeop_entries[] = { 75 { &vop_default_desc, (vop_t *) vop_eopnotsupp }, 76 { &vop_advlock_desc, (vop_t *) vop_einval }, 77 { &vop_bmap_desc, (vop_t *) vop_stdbmap }, 78 { &vop_close_desc, (vop_t *) vop_null }, 79 { &vop_createvobject_desc, (vop_t *) vop_stdcreatevobject }, 80 { &vop_destroyvobject_desc, (vop_t *) vop_stddestroyvobject }, 81 { &vop_fsync_desc, (vop_t *) vop_null }, 82 { &vop_getpages_desc, (vop_t *) vop_stdgetpages }, 83 { &vop_getvobject_desc, (vop_t *) vop_stdgetvobject }, 84 { &vop_inactive_desc, (vop_t *) vop_stdinactive }, 85 { &vop_ioctl_desc, (vop_t *) vop_enotty }, 86 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 87 { &vop_lease_desc, (vop_t *) vop_null }, 88 { &vop_lock_desc, (vop_t *) vop_stdlock }, 89 { &vop_lookup_desc, (vop_t *) vop_nolookup }, 90 { &vop_open_desc, (vop_t *) vop_null }, 91 { &vop_pathconf_desc, (vop_t *) vop_einval }, 92 { &vop_poll_desc, (vop_t *) vop_nopoll }, 93 { &vop_putpages_desc, (vop_t *) vop_stdputpages }, 94 { &vop_readlink_desc, (vop_t *) vop_einval }, 95 { &vop_revoke_desc, (vop_t *) vop_revoke }, 96 { &vop_strategy_desc, (vop_t *) vop_nostrategy }, 97 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 98 { NULL, NULL } 99 }; 100 101 static struct vnodeopv_desc default_vnodeop_opv_desc = 102 { &default_vnodeop_p, default_vnodeop_entries }; 103 104 VNODEOP_SET(default_vnodeop_opv_desc); 105 106 /* 107 * Series of placeholder functions for various error returns for 108 * VOPs. 109 */ 110 111 int 112 vop_eopnotsupp(struct vop_generic_args *ap) 113 { 114 /* 115 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 116 */ 117 118 return (EOPNOTSUPP); 119 } 120 121 int 122 vop_ebadf(struct vop_generic_args *ap) 123 { 124 125 return (EBADF); 126 } 127 128 int 129 vop_enotty(struct vop_generic_args *ap) 130 { 131 132 return (ENOTTY); 133 } 134 135 int 136 vop_einval(struct vop_generic_args *ap) 137 { 138 139 return (EINVAL); 140 } 141 142 int 143 vop_null(struct vop_generic_args *ap) 144 { 145 146 return (0); 147 } 148 149 /* 150 * Used to make a defined VOP fall back to the default VOP. 151 */ 152 int 153 vop_defaultop(struct vop_generic_args *ap) 154 { 155 156 return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap)); 157 } 158 159 /* 160 * Helper function to panic on some bad VOPs in some filesystems. 161 */ 162 int 163 vop_panic(struct vop_generic_args *ap) 164 { 165 166 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); 167 } 168 169 /* 170 * vop_std<something> and vop_no<something> are default functions for use by 171 * filesystems that need the "default reasonable" implementation for a 172 * particular operation. 173 * 174 * The documentation for the operations they implement exists (if it exists) 175 * in the VOP_<SOMETHING>(9) manpage (all uppercase). 176 */ 177 178 /* 179 * Default vop for filesystems that do not support name lookup 180 */ 181 static int 182 vop_nolookup(ap) 183 struct vop_lookup_args /* { 184 struct vnode *a_dvp; 185 struct vnode **a_vpp; 186 struct componentname *a_cnp; 187 } */ *ap; 188 { 189 190 *ap->a_vpp = NULL; 191 return (ENOTDIR); 192 } 193 194 /* 195 * vop_nostrategy: 196 * 197 * Strategy routine for VFS devices that have none. 198 * 199 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy 200 * routine. Typically this is done for a BIO_READ strategy call. 201 * Typically B_INVAL is assumed to already be clear prior to a write 202 * and should not be cleared manually unless you just made the buffer 203 * invalid. BIO_ERROR should be cleared either way. 204 */ 205 206 static int 207 vop_nostrategy (struct vop_strategy_args *ap) 208 { 209 printf("No strategy for buffer at %p\n", ap->a_bp); 210 vprint("vnode", ap->a_vp); 211 ap->a_bp->b_ioflags |= BIO_ERROR; 212 ap->a_bp->b_error = EOPNOTSUPP; 213 bufdone(ap->a_bp); 214 return (EOPNOTSUPP); 215 } 216 217 /* 218 * vop_stdpathconf: 219 * 220 * Standard implementation of POSIX pathconf, to get information about limits 221 * for a filesystem. 222 * Override per filesystem for the case where the filesystem has smaller 223 * limits. 224 */ 225 int 226 vop_stdpathconf(ap) 227 struct vop_pathconf_args /* { 228 struct vnode *a_vp; 229 int a_name; 230 int *a_retval; 231 } */ *ap; 232 { 233 234 switch (ap->a_name) { 235 case _PC_LINK_MAX: 236 *ap->a_retval = LINK_MAX; 237 return (0); 238 case _PC_MAX_CANON: 239 *ap->a_retval = MAX_CANON; 240 return (0); 241 case _PC_MAX_INPUT: 242 *ap->a_retval = MAX_INPUT; 243 return (0); 244 case _PC_PIPE_BUF: 245 *ap->a_retval = PIPE_BUF; 246 return (0); 247 case _PC_CHOWN_RESTRICTED: 248 *ap->a_retval = 1; 249 return (0); 250 case _PC_VDISABLE: 251 *ap->a_retval = _POSIX_VDISABLE; 252 return (0); 253 default: 254 return (EINVAL); 255 } 256 /* NOTREACHED */ 257 } 258 259 /* 260 * Standard lock, unlock and islocked functions. 261 */ 262 int 263 vop_stdlock(ap) 264 struct vop_lock_args /* { 265 struct vnode *a_vp; 266 int a_flags; 267 struct thread *a_td; 268 } */ *ap; 269 { 270 struct vnode *vp = ap->a_vp; 271 272 #ifndef DEBUG_LOCKS 273 return (lockmgr(vp->v_vnlock, ap->a_flags, VI_MTX(vp), ap->a_td)); 274 #else 275 return (debuglockmgr(vp->v_vnlock, ap->a_flags, VI_MTX(vp), 276 ap->a_td, "vop_stdlock", vp->filename, vp->line)); 277 #endif 278 } 279 280 /* See above. */ 281 int 282 vop_stdunlock(ap) 283 struct vop_unlock_args /* { 284 struct vnode *a_vp; 285 int a_flags; 286 struct thread *a_td; 287 } */ *ap; 288 { 289 struct vnode *vp = ap->a_vp; 290 291 return (lockmgr(vp->v_vnlock, ap->a_flags | LK_RELEASE, VI_MTX(vp), 292 ap->a_td)); 293 } 294 295 /* See above. */ 296 int 297 vop_stdislocked(ap) 298 struct vop_islocked_args /* { 299 struct vnode *a_vp; 300 struct thread *a_td; 301 } */ *ap; 302 { 303 304 return (lockstatus(ap->a_vp->v_vnlock, ap->a_td)); 305 } 306 307 /* Mark the vnode inactive */ 308 int 309 vop_stdinactive(ap) 310 struct vop_inactive_args /* { 311 struct vnode *a_vp; 312 struct thread *a_td; 313 } */ *ap; 314 { 315 316 VOP_UNLOCK(ap->a_vp, 0, ap->a_td); 317 return (0); 318 } 319 320 /* 321 * Return true for select/poll. 322 */ 323 int 324 vop_nopoll(ap) 325 struct vop_poll_args /* { 326 struct vnode *a_vp; 327 int a_events; 328 struct ucred *a_cred; 329 struct thread *a_td; 330 } */ *ap; 331 { 332 /* 333 * Return true for read/write. If the user asked for something 334 * special, return POLLNVAL, so that clients have a way of 335 * determining reliably whether or not the extended 336 * functionality is present without hard-coding knowledge 337 * of specific filesystem implementations. 338 * Stay in sync with kern_conf.c::no_poll(). 339 */ 340 if (ap->a_events & ~POLLSTANDARD) 341 return (POLLNVAL); 342 343 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 344 } 345 346 /* 347 * Implement poll for local filesystems that support it. 348 */ 349 int 350 vop_stdpoll(ap) 351 struct vop_poll_args /* { 352 struct vnode *a_vp; 353 int a_events; 354 struct ucred *a_cred; 355 struct thread *a_td; 356 } */ *ap; 357 { 358 if (ap->a_events & ~POLLSTANDARD) 359 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); 360 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 361 } 362 363 /* 364 * Return our mount point, as we will take charge of the writes. 365 */ 366 int 367 vop_stdgetwritemount(ap) 368 struct vop_getwritemount_args /* { 369 struct vnode *a_vp; 370 struct mount **a_mpp; 371 } */ *ap; 372 { 373 374 *(ap->a_mpp) = ap->a_vp->v_mount; 375 return (0); 376 } 377 378 /* Create the VM system backing object for this vnode */ 379 int 380 vop_stdcreatevobject(ap) 381 struct vop_createvobject_args /* { 382 struct vnode *vp; 383 struct ucred *cred; 384 struct thread *td; 385 } */ *ap; 386 { 387 struct vnode *vp = ap->a_vp; 388 struct ucred *cred = ap->a_cred; 389 struct thread *td = ap->a_td; 390 struct vattr vat; 391 vm_object_t object; 392 int error = 0; 393 394 GIANT_REQUIRED; 395 396 if (!vn_isdisk(vp, NULL) && vn_canvmio(vp) == FALSE) 397 return (0); 398 399 retry: 400 if ((object = vp->v_object) == NULL) { 401 if (vp->v_type == VREG || vp->v_type == VDIR) { 402 if ((error = VOP_GETATTR(vp, &vat, cred, td)) != 0) 403 goto retn; 404 object = vnode_pager_alloc(vp, vat.va_size, 0, 0); 405 } else if (vn_isdisk(vp, NULL)) { 406 /* 407 * This simply allocates the biggest object possible 408 * for a disk vnode. This should be fixed, but doesn't 409 * cause any problems (yet). 410 */ 411 object = vnode_pager_alloc(vp, IDX_TO_OFF(INT_MAX), 0, 0); 412 } else { 413 goto retn; 414 } 415 /* 416 * Dereference the reference we just created. This assumes 417 * that the object is associated with the vp. 418 */ 419 VM_OBJECT_LOCK(object); 420 object->ref_count--; 421 VM_OBJECT_UNLOCK(object); 422 vrele(vp); 423 } else { 424 VM_OBJECT_LOCK(object); 425 if (object->flags & OBJ_DEAD) { 426 VOP_UNLOCK(vp, 0, td); 427 msleep(object, VM_OBJECT_MTX(object), PDROP | PVM, 428 "vodead", 0); 429 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 430 goto retry; 431 } 432 VM_OBJECT_UNLOCK(object); 433 } 434 435 KASSERT(vp->v_object != NULL, ("vfs_object_create: NULL object")); 436 vp->v_vflag |= VV_OBJBUF; 437 438 retn: 439 return (error); 440 } 441 442 /* Destroy the VM system object associated with this vnode */ 443 int 444 vop_stddestroyvobject(ap) 445 struct vop_destroyvobject_args /* { 446 struct vnode *vp; 447 } */ *ap; 448 { 449 struct vnode *vp = ap->a_vp; 450 vm_object_t obj = vp->v_object; 451 452 GIANT_REQUIRED; 453 454 if (obj == NULL) 455 return (0); 456 VM_OBJECT_LOCK(obj); 457 if (obj->ref_count == 0) { 458 /* 459 * vclean() may be called twice. The first time 460 * removes the primary reference to the object, 461 * the second time goes one further and is a 462 * special-case to terminate the object. 463 * 464 * don't double-terminate the object 465 */ 466 if ((obj->flags & OBJ_DEAD) == 0) 467 vm_object_terminate(obj); 468 else 469 VM_OBJECT_UNLOCK(obj); 470 } else { 471 /* 472 * Woe to the process that tries to page now :-). 473 */ 474 vm_pager_deallocate(obj); 475 VM_OBJECT_UNLOCK(obj); 476 } 477 return (0); 478 } 479 480 /* 481 * Return the underlying VM object. This routine may be called with or 482 * without the vnode interlock held. If called without, the returned 483 * object is not guarenteed to be valid. The syncer typically gets the 484 * object without holding the interlock in order to quickly test whether 485 * it might be dirty before going heavy-weight. vm_object's use zalloc 486 * and thus stable-storage, so this is safe. 487 */ 488 int 489 vop_stdgetvobject(ap) 490 struct vop_getvobject_args /* { 491 struct vnode *vp; 492 struct vm_object **objpp; 493 } */ *ap; 494 { 495 struct vnode *vp = ap->a_vp; 496 struct vm_object **objpp = ap->a_objpp; 497 498 if (objpp) 499 *objpp = vp->v_object; 500 return (vp->v_object ? 0 : EINVAL); 501 } 502 503 /* XXX Needs good comment and VOP_BMAP(9) manpage */ 504 int 505 vop_stdbmap(ap) 506 struct vop_bmap_args /* { 507 struct vnode *a_vp; 508 daddr_t a_bn; 509 struct vnode **a_vpp; 510 daddr_t *a_bnp; 511 int *a_runp; 512 int *a_runb; 513 } */ *ap; 514 { 515 516 if (ap->a_vpp != NULL) 517 *ap->a_vpp = ap->a_vp; 518 if (ap->a_bnp != NULL) 519 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 520 if (ap->a_runp != NULL) 521 *ap->a_runp = 0; 522 if (ap->a_runb != NULL) 523 *ap->a_runb = 0; 524 return (0); 525 } 526 527 int 528 vop_stdfsync(ap) 529 struct vop_fsync_args /* { 530 struct vnode *a_vp; 531 struct ucred *a_cred; 532 int a_waitfor; 533 struct thread *a_td; 534 } */ *ap; 535 { 536 struct vnode *vp = ap->a_vp; 537 struct buf *bp; 538 struct bufobj *bo; 539 struct buf *nbp; 540 int s, error = 0; 541 int maxretry = 100; /* large, arbitrarily chosen */ 542 543 VI_LOCK(vp); 544 loop1: 545 /* 546 * MARK/SCAN initialization to avoid infinite loops. 547 */ 548 s = splbio(); 549 TAILQ_FOREACH(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs) { 550 bp->b_vflags &= ~BV_SCANNED; 551 bp->b_error = 0; 552 } 553 splx(s); 554 555 /* 556 * Flush all dirty buffers associated with a block device. 557 */ 558 loop2: 559 s = splbio(); 560 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) { 561 if ((bp->b_vflags & BV_SCANNED) != 0) 562 continue; 563 bp->b_vflags |= BV_SCANNED; 564 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) 565 continue; 566 VI_UNLOCK(vp); 567 if ((bp->b_flags & B_DELWRI) == 0) 568 panic("fsync: not dirty"); 569 if ((vp->v_vflag & VV_OBJBUF) && (bp->b_flags & B_CLUSTEROK)) { 570 vfs_bio_awrite(bp); 571 splx(s); 572 } else { 573 bremfree(bp); 574 splx(s); 575 bawrite(bp); 576 } 577 VI_LOCK(vp); 578 goto loop2; 579 } 580 581 /* 582 * If synchronous the caller expects us to completely resolve all 583 * dirty buffers in the system. Wait for in-progress I/O to 584 * complete (which could include background bitmap writes), then 585 * retry if dirty blocks still exist. 586 */ 587 if (ap->a_waitfor == MNT_WAIT) { 588 bo = &vp->v_bufobj; 589 bufobj_wwait(bo, 0, 0); 590 if (bo->bo_dirty.bv_cnt > 0) { 591 /* 592 * If we are unable to write any of these buffers 593 * then we fail now rather than trying endlessly 594 * to write them out. 595 */ 596 TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) 597 if ((error = bp->b_error) == 0) 598 continue; 599 if (error == 0 && --maxretry >= 0) { 600 splx(s); 601 goto loop1; 602 } 603 vprint("fsync: giving up on dirty", vp); 604 error = EAGAIN; 605 } 606 } 607 VI_UNLOCK(vp); 608 splx(s); 609 610 return (error); 611 } 612 613 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ 614 int 615 vop_stdgetpages(ap) 616 struct vop_getpages_args /* { 617 struct vnode *a_vp; 618 vm_page_t *a_m; 619 int a_count; 620 int a_reqpage; 621 vm_ooffset_t a_offset; 622 } */ *ap; 623 { 624 625 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 626 ap->a_count, ap->a_reqpage); 627 } 628 629 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ 630 int 631 vop_stdputpages(ap) 632 struct vop_putpages_args /* { 633 struct vnode *a_vp; 634 vm_page_t *a_m; 635 int a_count; 636 int a_sync; 637 int *a_rtvals; 638 vm_ooffset_t a_offset; 639 } */ *ap; 640 { 641 642 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 643 ap->a_sync, ap->a_rtvals); 644 } 645 646 /* 647 * vfs default ops 648 * used to fill the vfs function table to get reasonable default return values. 649 */ 650 int 651 vfs_stdroot (mp, vpp, td) 652 struct mount *mp; 653 struct vnode **vpp; 654 struct thread *td; 655 { 656 657 return (EOPNOTSUPP); 658 } 659 660 int 661 vfs_stdstatfs (mp, sbp, td) 662 struct mount *mp; 663 struct statfs *sbp; 664 struct thread *td; 665 { 666 667 return (EOPNOTSUPP); 668 } 669 670 int 671 vfs_stdvptofh (vp, fhp) 672 struct vnode *vp; 673 struct fid *fhp; 674 { 675 676 return (EOPNOTSUPP); 677 } 678 679 int 680 vfs_stdstart (mp, flags, td) 681 struct mount *mp; 682 int flags; 683 struct thread *td; 684 { 685 686 return (0); 687 } 688 689 int 690 vfs_stdquotactl (mp, cmds, uid, arg, td) 691 struct mount *mp; 692 int cmds; 693 uid_t uid; 694 caddr_t arg; 695 struct thread *td; 696 { 697 698 return (EOPNOTSUPP); 699 } 700 701 int 702 vfs_stdsync(mp, waitfor, cred, td) 703 struct mount *mp; 704 int waitfor; 705 struct ucred *cred; 706 struct thread *td; 707 { 708 struct vnode *vp, *nvp; 709 int error, lockreq, allerror = 0; 710 711 lockreq = LK_EXCLUSIVE | LK_INTERLOCK; 712 if (waitfor != MNT_WAIT) 713 lockreq |= LK_NOWAIT; 714 /* 715 * Force stale buffer cache information to be flushed. 716 */ 717 MNT_ILOCK(mp); 718 loop: 719 MNT_VNODE_FOREACH(vp, mp, nvp) { 720 721 VI_LOCK(vp); 722 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) { 723 VI_UNLOCK(vp); 724 continue; 725 } 726 MNT_IUNLOCK(mp); 727 728 if ((error = vget(vp, lockreq, td)) != 0) { 729 MNT_ILOCK(mp); 730 if (error == ENOENT) 731 goto loop; 732 continue; 733 } 734 error = VOP_FSYNC(vp, cred, waitfor, td); 735 if (error) 736 allerror = error; 737 738 VOP_UNLOCK(vp, 0, td); 739 vrele(vp); 740 MNT_ILOCK(mp); 741 } 742 MNT_IUNLOCK(mp); 743 return (allerror); 744 } 745 746 int 747 vfs_stdnosync (mp, waitfor, cred, td) 748 struct mount *mp; 749 int waitfor; 750 struct ucred *cred; 751 struct thread *td; 752 { 753 754 return (0); 755 } 756 757 int 758 vfs_stdvget (mp, ino, flags, vpp) 759 struct mount *mp; 760 ino_t ino; 761 int flags; 762 struct vnode **vpp; 763 { 764 765 return (EOPNOTSUPP); 766 } 767 768 int 769 vfs_stdfhtovp (mp, fhp, vpp) 770 struct mount *mp; 771 struct fid *fhp; 772 struct vnode **vpp; 773 { 774 775 return (EOPNOTSUPP); 776 } 777 778 int 779 vfs_stdinit (vfsp) 780 struct vfsconf *vfsp; 781 { 782 783 return (0); 784 } 785 786 int 787 vfs_stduninit (vfsp) 788 struct vfsconf *vfsp; 789 { 790 791 return(0); 792 } 793 794 int 795 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname, td) 796 struct mount *mp; 797 int cmd; 798 struct vnode *filename_vp; 799 int attrnamespace; 800 const char *attrname; 801 struct thread *td; 802 { 803 804 if (filename_vp != NULL) 805 VOP_UNLOCK(filename_vp, 0, td); 806 return (EOPNOTSUPP); 807 } 808 809 int 810 vfs_stdsysctl(mp, op, req) 811 struct mount *mp; 812 fsctlop_t op; 813 struct sysctl_req *req; 814 { 815 816 return (EOPNOTSUPP); 817 } 818 819 /* end of vfs default ops */ 820