vfs_default.c revision 101308
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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * 39 * $FreeBSD: head/sys/kern/vfs_default.c 101308 2002-08-04 10:29:36Z jeff $ 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/bio.h> 45#include <sys/buf.h> 46#include <sys/conf.h> 47#include <sys/kernel.h> 48#include <sys/lock.h> 49#include <sys/malloc.h> 50#include <sys/mount.h> 51#include <sys/mutex.h> 52#include <sys/unistd.h> 53#include <sys/vnode.h> 54#include <sys/poll.h> 55 56#include <machine/limits.h> 57 58#include <vm/vm.h> 59#include <vm/vm_object.h> 60#include <vm/vm_extern.h> 61#include <vm/pmap.h> 62#include <vm/vm_map.h> 63#include <vm/vm_page.h> 64#include <vm/vm_pager.h> 65#include <vm/vnode_pager.h> 66 67static int vop_nolookup(struct vop_lookup_args *); 68static int vop_nostrategy(struct vop_strategy_args *); 69 70/* 71 * This vnode table stores what we want to do if the filesystem doesn't 72 * implement a particular VOP. 73 * 74 * If there is no specific entry here, we will return EOPNOTSUPP. 75 * 76 */ 77 78vop_t **default_vnodeop_p; 79static struct vnodeopv_entry_desc default_vnodeop_entries[] = { 80 { &vop_default_desc, (vop_t *) vop_eopnotsupp }, 81 { &vop_advlock_desc, (vop_t *) vop_einval }, 82 { &vop_bmap_desc, (vop_t *) vop_stdbmap }, 83 { &vop_close_desc, (vop_t *) vop_null }, 84 { &vop_createvobject_desc, (vop_t *) vop_stdcreatevobject }, 85 { &vop_destroyvobject_desc, (vop_t *) vop_stddestroyvobject }, 86 { &vop_fsync_desc, (vop_t *) vop_null }, 87 { &vop_getpages_desc, (vop_t *) vop_stdgetpages }, 88 { &vop_getvobject_desc, (vop_t *) vop_stdgetvobject }, 89 { &vop_inactive_desc, (vop_t *) vop_stdinactive }, 90 { &vop_ioctl_desc, (vop_t *) vop_enotty }, 91 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 92 { &vop_lease_desc, (vop_t *) vop_null }, 93 { &vop_lock_desc, (vop_t *) vop_stdlock }, 94 { &vop_lookup_desc, (vop_t *) vop_nolookup }, 95 { &vop_open_desc, (vop_t *) vop_null }, 96 { &vop_pathconf_desc, (vop_t *) vop_einval }, 97 { &vop_putpages_desc, (vop_t *) vop_stdputpages }, 98 { &vop_poll_desc, (vop_t *) vop_nopoll }, 99 { &vop_readlink_desc, (vop_t *) vop_einval }, 100 { &vop_revoke_desc, (vop_t *) vop_revoke }, 101 { &vop_strategy_desc, (vop_t *) vop_nostrategy }, 102 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 103 { NULL, NULL } 104}; 105 106static struct vnodeopv_desc default_vnodeop_opv_desc = 107 { &default_vnodeop_p, default_vnodeop_entries }; 108 109VNODEOP_SET(default_vnodeop_opv_desc); 110 111/* 112 * Series of placeholder functions for various error returns for 113 * VOPs. 114 */ 115 116int 117vop_eopnotsupp(struct vop_generic_args *ap) 118{ 119 /* 120 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 121 */ 122 123 return (EOPNOTSUPP); 124} 125 126int 127vop_ebadf(struct vop_generic_args *ap) 128{ 129 130 return (EBADF); 131} 132 133int 134vop_enotty(struct vop_generic_args *ap) 135{ 136 137 return (ENOTTY); 138} 139 140int 141vop_einval(struct vop_generic_args *ap) 142{ 143 144 return (EINVAL); 145} 146 147int 148vop_null(struct vop_generic_args *ap) 149{ 150 151 return (0); 152} 153 154/* 155 * Used to make a defined VOP fall back to the default VOP. 156 */ 157int 158vop_defaultop(struct vop_generic_args *ap) 159{ 160 161 return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap)); 162} 163 164/* 165 * Helper function to panic on some bad VOPs in some filesystems. 166 */ 167int 168vop_panic(struct vop_generic_args *ap) 169{ 170 171 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); 172} 173 174/* 175 * vop_std<something> and vop_no<something> are default functions for use by 176 * filesystems that need the "default reasonable" implementation for a 177 * particular operation. 178 * 179 * The documentation for the operations they implement exists (if it exists) 180 * in the VOP_<SOMETHING>(9) manpage (all uppercase). 181 */ 182 183/* 184 * Default vop for filesystems that do not support name lookup 185 */ 186static int 187vop_nolookup(ap) 188 struct vop_lookup_args /* { 189 struct vnode *a_dvp; 190 struct vnode **a_vpp; 191 struct componentname *a_cnp; 192 } */ *ap; 193{ 194 195 *ap->a_vpp = NULL; 196 return (ENOTDIR); 197} 198 199/* 200 * vop_nostrategy: 201 * 202 * Strategy routine for VFS devices that have none. 203 * 204 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy 205 * routine. Typically this is done for a BIO_READ strategy call. 206 * Typically B_INVAL is assumed to already be clear prior to a write 207 * and should not be cleared manually unless you just made the buffer 208 * invalid. BIO_ERROR should be cleared either way. 209 */ 210 211static int 212vop_nostrategy (struct vop_strategy_args *ap) 213{ 214 printf("No strategy for buffer at %p\n", ap->a_bp); 215 vprint("", ap->a_vp); 216 vprint("", ap->a_bp->b_vp); 217 ap->a_bp->b_ioflags |= BIO_ERROR; 218 ap->a_bp->b_error = EOPNOTSUPP; 219 bufdone(ap->a_bp); 220 return (EOPNOTSUPP); 221} 222 223/* 224 * vop_stdpathconf: 225 * 226 * Standard implementation of POSIX pathconf, to get information about limits 227 * for a filesystem. 228 * Override per filesystem for the case where the filesystem has smaller 229 * limits. 230 */ 231int 232vop_stdpathconf(ap) 233 struct vop_pathconf_args /* { 234 struct vnode *a_vp; 235 int a_name; 236 int *a_retval; 237 } */ *ap; 238{ 239 240 switch (ap->a_name) { 241 case _PC_LINK_MAX: 242 *ap->a_retval = LINK_MAX; 243 return (0); 244 case _PC_MAX_CANON: 245 *ap->a_retval = MAX_CANON; 246 return (0); 247 case _PC_MAX_INPUT: 248 *ap->a_retval = MAX_INPUT; 249 return (0); 250 case _PC_PIPE_BUF: 251 *ap->a_retval = PIPE_BUF; 252 return (0); 253 case _PC_CHOWN_RESTRICTED: 254 *ap->a_retval = 1; 255 return (0); 256 case _PC_VDISABLE: 257 *ap->a_retval = _POSIX_VDISABLE; 258 return (0); 259 default: 260 return (EINVAL); 261 } 262 /* NOTREACHED */ 263} 264 265/* 266 * Standard lock, unlock and islocked functions. 267 */ 268int 269vop_stdlock(ap) 270 struct vop_lock_args /* { 271 struct vnode *a_vp; 272 int a_flags; 273 struct thread *a_td; 274 } */ *ap; 275{ 276 struct vnode *vp = ap->a_vp; 277 278#ifndef DEBUG_LOCKS 279 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, ap->a_td)); 280#else 281 return (debuglockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, 282 ap->a_td, "vop_stdlock", vp->filename, vp->line)); 283#endif 284} 285 286/* See above. */ 287int 288vop_stdunlock(ap) 289 struct vop_unlock_args /* { 290 struct vnode *a_vp; 291 int a_flags; 292 struct thread *a_td; 293 } */ *ap; 294{ 295 struct vnode *vp = ap->a_vp; 296 297 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, 298 ap->a_td)); 299} 300 301/* See above. */ 302int 303vop_stdislocked(ap) 304 struct vop_islocked_args /* { 305 struct vnode *a_vp; 306 struct thread *a_td; 307 } */ *ap; 308{ 309 310 return (lockstatus(&ap->a_vp->v_lock, ap->a_td)); 311} 312 313/* Mark the vnode inactive */ 314int 315vop_stdinactive(ap) 316 struct vop_inactive_args /* { 317 struct vnode *a_vp; 318 struct thread *a_td; 319 } */ *ap; 320{ 321 322 VOP_UNLOCK(ap->a_vp, 0, ap->a_td); 323 return (0); 324} 325 326/* 327 * Return true for select/poll. 328 */ 329int 330vop_nopoll(ap) 331 struct vop_poll_args /* { 332 struct vnode *a_vp; 333 int a_events; 334 struct ucred *a_cred; 335 struct thread *a_td; 336 } */ *ap; 337{ 338 /* 339 * Return true for read/write. If the user asked for something 340 * special, return POLLNVAL, so that clients have a way of 341 * determining reliably whether or not the extended 342 * functionality is present without hard-coding knowledge 343 * of specific filesystem implementations. 344 */ 345 if (ap->a_events & ~POLLSTANDARD) 346 return (POLLNVAL); 347 348 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 349} 350 351/* 352 * Implement poll for local filesystems that support it. 353 */ 354int 355vop_stdpoll(ap) 356 struct vop_poll_args /* { 357 struct vnode *a_vp; 358 int a_events; 359 struct ucred *a_cred; 360 struct thread *a_td; 361 } */ *ap; 362{ 363 if (ap->a_events & ~POLLSTANDARD) 364 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); 365 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 366} 367 368/* 369 * Stubs to use when there is no locking to be done on the underlying object. 370 * A minimal shared lock is necessary to ensure that the underlying object 371 * is not revoked while an operation is in progress. So, an active shared 372 * count is maintained in an auxillary vnode lock structure. 373 */ 374int 375vop_sharedlock(ap) 376 struct vop_lock_args /* { 377 struct vnode *a_vp; 378 int a_flags; 379 struct thread *a_td; 380 } */ *ap; 381{ 382 /* 383 * This code cannot be used until all the non-locking filesystems 384 * (notably NFS) are converted to properly lock and release nodes. 385 * Also, certain vnode operations change the locking state within 386 * the operation (create, mknod, remove, link, rename, mkdir, rmdir, 387 * and symlink). Ideally these operations should not change the 388 * lock state, but should be changed to let the caller of the 389 * function unlock them. Otherwise all intermediate vnode layers 390 * (such as union, umapfs, etc) must catch these functions to do 391 * the necessary locking at their layer. Note that the inactive 392 * and lookup operations also change their lock state, but this 393 * cannot be avoided, so these two operations will always need 394 * to be handled in intermediate layers. 395 */ 396 struct vnode *vp = ap->a_vp; 397 int vnflags, flags = ap->a_flags; 398 399 switch (flags & LK_TYPE_MASK) { 400 case LK_DRAIN: 401 vnflags = LK_DRAIN; 402 break; 403 case LK_EXCLUSIVE: 404#ifdef DEBUG_VFS_LOCKS 405 /* 406 * Normally, we use shared locks here, but that confuses 407 * the locking assertions. 408 */ 409 vnflags = LK_EXCLUSIVE; 410 break; 411#endif 412 case LK_SHARED: 413 vnflags = LK_SHARED; 414 break; 415 case LK_UPGRADE: 416 case LK_EXCLUPGRADE: 417 case LK_DOWNGRADE: 418 return (0); 419 case LK_RELEASE: 420 default: 421 panic("vop_sharedlock: bad operation %d", flags & LK_TYPE_MASK); 422 } 423 if (flags & LK_INTERLOCK) 424 vnflags |= LK_INTERLOCK; 425#ifndef DEBUG_LOCKS 426 return (lockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_td)); 427#else 428 return (debuglockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_td, 429 "vop_sharedlock", vp->filename, vp->line)); 430#endif 431} 432 433/* 434 * Stubs to use when there is no locking to be done on the underlying object. 435 * A minimal shared lock is necessary to ensure that the underlying object 436 * is not revoked while an operation is in progress. So, an active shared 437 * count is maintained in an auxillary vnode lock structure. 438 */ 439int 440vop_nolock(ap) 441 struct vop_lock_args /* { 442 struct vnode *a_vp; 443 int a_flags; 444 struct thread *a_td; 445 } */ *ap; 446{ 447#ifdef notyet 448 /* 449 * This code cannot be used until all the non-locking filesystems 450 * (notably NFS) are converted to properly lock and release nodes. 451 * Also, certain vnode operations change the locking state within 452 * the operation (create, mknod, remove, link, rename, mkdir, rmdir, 453 * and symlink). Ideally these operations should not change the 454 * lock state, but should be changed to let the caller of the 455 * function unlock them. Otherwise all intermediate vnode layers 456 * (such as union, umapfs, etc) must catch these functions to do 457 * the necessary locking at their layer. Note that the inactive 458 * and lookup operations also change their lock state, but this 459 * cannot be avoided, so these two operations will always need 460 * to be handled in intermediate layers. 461 */ 462 struct vnode *vp = ap->a_vp; 463 int vnflags, flags = ap->a_flags; 464 465 switch (flags & LK_TYPE_MASK) { 466 case LK_DRAIN: 467 vnflags = LK_DRAIN; 468 break; 469 case LK_EXCLUSIVE: 470 case LK_SHARED: 471 vnflags = LK_SHARED; 472 break; 473 case LK_UPGRADE: 474 case LK_EXCLUPGRADE: 475 case LK_DOWNGRADE: 476 return (0); 477 case LK_RELEASE: 478 default: 479 panic("vop_nolock: bad operation %d", flags & LK_TYPE_MASK); 480 } 481 if (flags & LK_INTERLOCK) 482 vnflags |= LK_INTERLOCK; 483 return(lockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_td)); 484#else /* for now */ 485 /* 486 * Since we are not using the lock manager, we must clear 487 * the interlock here. 488 */ 489 if (ap->a_flags & LK_INTERLOCK) 490 mtx_unlock(&ap->a_vp->v_interlock); 491 return (0); 492#endif 493} 494 495/* 496 * Do the inverse of vop_nolock, handling the interlock in a compatible way. 497 */ 498int 499vop_nounlock(ap) 500 struct vop_unlock_args /* { 501 struct vnode *a_vp; 502 int a_flags; 503 struct thread *a_td; 504 } */ *ap; 505{ 506 507 /* 508 * Since we are not using the lock manager, we must clear 509 * the interlock here. 510 */ 511 if (ap->a_flags & LK_INTERLOCK) 512 mtx_unlock(&ap->a_vp->v_interlock); 513 return (0); 514} 515 516/* 517 * Return whether or not the node is in use. 518 */ 519int 520vop_noislocked(ap) 521 struct vop_islocked_args /* { 522 struct vnode *a_vp; 523 struct thread *a_td; 524 } */ *ap; 525{ 526 527 return (0); 528} 529 530/* 531 * Return our mount point, as we will take charge of the writes. 532 */ 533int 534vop_stdgetwritemount(ap) 535 struct vop_getwritemount_args /* { 536 struct vnode *a_vp; 537 struct mount **a_mpp; 538 } */ *ap; 539{ 540 541 *(ap->a_mpp) = ap->a_vp->v_mount; 542 return (0); 543} 544 545/* Create the VM system backing object for this vnode */ 546int 547vop_stdcreatevobject(ap) 548 struct vop_createvobject_args /* { 549 struct vnode *vp; 550 struct ucred *cred; 551 struct thread *td; 552 } */ *ap; 553{ 554 struct vnode *vp = ap->a_vp; 555 struct ucred *cred = ap->a_cred; 556 struct thread *td = ap->a_td; 557 struct vattr vat; 558 vm_object_t object; 559 int error = 0; 560 561 GIANT_REQUIRED; 562 563 if (!vn_isdisk(vp, NULL) && vn_canvmio(vp) == FALSE) 564 return (0); 565 566retry: 567 if ((object = vp->v_object) == NULL) { 568 if (vp->v_type == VREG || vp->v_type == VDIR) { 569 if ((error = VOP_GETATTR(vp, &vat, cred, td)) != 0) 570 goto retn; 571 object = vnode_pager_alloc(vp, vat.va_size, 0, 0); 572 } else if (devsw(vp->v_rdev) != NULL) { 573 /* 574 * This simply allocates the biggest object possible 575 * for a disk vnode. This should be fixed, but doesn't 576 * cause any problems (yet). 577 */ 578 object = vnode_pager_alloc(vp, IDX_TO_OFF(INT_MAX), 0, 0); 579 } else { 580 goto retn; 581 } 582 /* 583 * Dereference the reference we just created. This assumes 584 * that the object is associated with the vp. 585 */ 586 object->ref_count--; 587 vp->v_usecount--; 588 } else { 589 if (object->flags & OBJ_DEAD) { 590 VOP_UNLOCK(vp, 0, td); 591 tsleep(object, PVM, "vodead", 0); 592 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 593 goto retry; 594 } 595 } 596 597 KASSERT(vp->v_object != NULL, ("vfs_object_create: NULL object")); 598 vp->v_vflag |= VV_OBJBUF; 599 600retn: 601 return (error); 602} 603 604/* Destroy the VM system object associated with this vnode */ 605int 606vop_stddestroyvobject(ap) 607 struct vop_destroyvobject_args /* { 608 struct vnode *vp; 609 } */ *ap; 610{ 611 struct vnode *vp = ap->a_vp; 612 vm_object_t obj = vp->v_object; 613 614 GIANT_REQUIRED; 615 616 if (vp->v_object == NULL) 617 return (0); 618 619 if (obj->ref_count == 0) { 620 /* 621 * vclean() may be called twice. The first time 622 * removes the primary reference to the object, 623 * the second time goes one further and is a 624 * special-case to terminate the object. 625 * 626 * don't double-terminate the object 627 */ 628 if ((obj->flags & OBJ_DEAD) == 0) 629 vm_object_terminate(obj); 630 } else { 631 /* 632 * Woe to the process that tries to page now :-). 633 */ 634 vm_pager_deallocate(obj); 635 } 636 return (0); 637} 638 639/* 640 * Return the underlying VM object. This routine may be called with or 641 * without the vnode interlock held. If called without, the returned 642 * object is not guarenteed to be valid. The syncer typically gets the 643 * object without holding the interlock in order to quickly test whether 644 * it might be dirty before going heavy-weight. vm_object's use zalloc 645 * and thus stable-storage, so this is safe. 646 */ 647int 648vop_stdgetvobject(ap) 649 struct vop_getvobject_args /* { 650 struct vnode *vp; 651 struct vm_object **objpp; 652 } */ *ap; 653{ 654 struct vnode *vp = ap->a_vp; 655 struct vm_object **objpp = ap->a_objpp; 656 657 if (objpp) 658 *objpp = vp->v_object; 659 return (vp->v_object ? 0 : EINVAL); 660} 661 662/* XXX Needs good comment and VOP_BMAP(9) manpage */ 663int 664vop_stdbmap(ap) 665 struct vop_bmap_args /* { 666 struct vnode *a_vp; 667 daddr_t a_bn; 668 struct vnode **a_vpp; 669 daddr_t *a_bnp; 670 int *a_runp; 671 int *a_runb; 672 } */ *ap; 673{ 674 675 if (ap->a_vpp != NULL) 676 *ap->a_vpp = ap->a_vp; 677 if (ap->a_bnp != NULL) 678 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 679 if (ap->a_runp != NULL) 680 *ap->a_runp = 0; 681 if (ap->a_runb != NULL) 682 *ap->a_runb = 0; 683 return (0); 684} 685 686/* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ 687int 688vop_stdgetpages(ap) 689 struct vop_getpages_args /* { 690 struct vnode *a_vp; 691 vm_page_t *a_m; 692 int a_count; 693 int a_reqpage; 694 vm_ooffset_t a_offset; 695 } */ *ap; 696{ 697 698 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 699 ap->a_count, ap->a_reqpage); 700} 701 702/* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ 703int 704vop_stdputpages(ap) 705 struct vop_putpages_args /* { 706 struct vnode *a_vp; 707 vm_page_t *a_m; 708 int a_count; 709 int a_sync; 710 int *a_rtvals; 711 vm_ooffset_t a_offset; 712 } */ *ap; 713{ 714 715 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 716 ap->a_sync, ap->a_rtvals); 717} 718 719 720 721/* 722 * vfs default ops 723 * used to fill the vfs function table to get reasonable default return values. 724 */ 725int 726vfs_stdroot (mp, vpp) 727 struct mount *mp; 728 struct vnode **vpp; 729{ 730 return (EOPNOTSUPP); 731} 732 733int 734vfs_stdstatfs (mp, sbp, td) 735 struct mount *mp; 736 struct statfs *sbp; 737 struct thread *td; 738{ 739 return (EOPNOTSUPP); 740} 741 742int 743vfs_stdvptofh (vp, fhp) 744 struct vnode *vp; 745 struct fid *fhp; 746{ 747 return (EOPNOTSUPP); 748} 749 750int 751vfs_stdstart (mp, flags, td) 752 struct mount *mp; 753 int flags; 754 struct thread *td; 755{ 756 return (0); 757} 758 759int 760vfs_stdquotactl (mp, cmds, uid, arg, td) 761 struct mount *mp; 762 int cmds; 763 uid_t uid; 764 caddr_t arg; 765 struct thread *td; 766{ 767 return (EOPNOTSUPP); 768} 769 770int 771vfs_stdsync (mp, waitfor, cred, td) 772 struct mount *mp; 773 int waitfor; 774 struct ucred *cred; 775 struct thread *td; 776{ 777 return (0); 778} 779 780int 781vfs_stdvget (mp, ino, flags, vpp) 782 struct mount *mp; 783 ino_t ino; 784 int flags; 785 struct vnode **vpp; 786{ 787 return (EOPNOTSUPP); 788} 789 790int 791vfs_stdfhtovp (mp, fhp, vpp) 792 struct mount *mp; 793 struct fid *fhp; 794 struct vnode **vpp; 795{ 796 return (EOPNOTSUPP); 797} 798 799int 800vfs_stdinit (vfsp) 801 struct vfsconf *vfsp; 802{ 803 return (0); 804} 805 806int 807vfs_stduninit (vfsp) 808 struct vfsconf *vfsp; 809{ 810 return(0); 811} 812 813int 814vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname, td) 815 struct mount *mp; 816 int cmd; 817 struct vnode *filename_vp; 818 int attrnamespace; 819 const char *attrname; 820 struct thread *td; 821{ 822 return(EOPNOTSUPP); 823} 824 825/* end of vfs default ops */ 826