vfs_default.c revision 79224
130489Sphk/* 230489Sphk * Copyright (c) 1989, 1993 330489Sphk * The Regents of the University of California. All rights reserved. 430489Sphk * 530489Sphk * This code is derived from software contributed 630489Sphk * to Berkeley by John Heidemann of the UCLA Ficus project. 730489Sphk * 830489Sphk * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project 930489Sphk * 1030489Sphk * Redistribution and use in source and binary forms, with or without 1130489Sphk * modification, are permitted provided that the following conditions 1230489Sphk * are met: 1330489Sphk * 1. Redistributions of source code must retain the above copyright 1430489Sphk * notice, this list of conditions and the following disclaimer. 1530489Sphk * 2. Redistributions in binary form must reproduce the above copyright 1630489Sphk * notice, this list of conditions and the following disclaimer in the 1730489Sphk * documentation and/or other materials provided with the distribution. 1830489Sphk * 3. All advertising materials mentioning features or use of this software 1930489Sphk * must display the following acknowledgement: 2030489Sphk * This product includes software developed by the University of 2130489Sphk * California, Berkeley and its contributors. 2230489Sphk * 4. Neither the name of the University nor the names of its contributors 2330489Sphk * may be used to endorse or promote products derived from this software 2430489Sphk * without specific prior written permission. 2530489Sphk * 2630489Sphk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2730489Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2830489Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2930489Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3030489Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3130489Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3230489Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3330489Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3430489Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3530489Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3630489Sphk * SUCH DAMAGE. 3730489Sphk * 3847989Sgpalmer * 3950477Speter * $FreeBSD: head/sys/kern/vfs_default.c 79224 2001-07-04 16:20:28Z dillon $ 4030489Sphk */ 4130489Sphk 4230489Sphk#include <sys/param.h> 4330489Sphk#include <sys/systm.h> 4460041Sphk#include <sys/bio.h> 4544272Sbde#include <sys/buf.h> 4665770Sbp#include <sys/conf.h> 4730489Sphk#include <sys/kernel.h> 4831561Sbde#include <sys/lock.h> 4930743Sphk#include <sys/malloc.h> 5051068Salfred#include <sys/mount.h> 5167365Sjhb#include <sys/mutex.h> 5230492Sphk#include <sys/unistd.h> 5330489Sphk#include <sys/vnode.h> 5430743Sphk#include <sys/poll.h> 5530489Sphk 5665770Sbp#include <machine/limits.h> 5765770Sbp 5865770Sbp#include <vm/vm.h> 5965770Sbp#include <vm/vm_object.h> 6065770Sbp#include <vm/vm_extern.h> 6165770Sbp#include <vm/pmap.h> 6265770Sbp#include <vm/vm_map.h> 6365770Sbp#include <vm/vm_page.h> 6465770Sbp#include <vm/vm_pager.h> 6565770Sbp#include <vm/vnode_pager.h> 6665770Sbp#include <vm/vm_zone.h> 6765770Sbp 6872594Sbdestatic int vop_nolookup __P((struct vop_lookup_args *)); 6972594Sbdestatic int vop_nostrategy __P((struct vop_strategy_args *)); 7030489Sphk 7130489Sphk/* 7230489Sphk * This vnode table stores what we want to do if the filesystem doesn't 7330489Sphk * implement a particular VOP. 7430489Sphk * 7530489Sphk * If there is no specific entry here, we will return EOPNOTSUPP. 7630489Sphk * 7730489Sphk */ 7830489Sphk 7930489Sphkvop_t **default_vnodeop_p; 8030489Sphkstatic struct vnodeopv_entry_desc default_vnodeop_entries[] = { 8130492Sphk { &vop_default_desc, (vop_t *) vop_eopnotsupp }, 8230492Sphk { &vop_advlock_desc, (vop_t *) vop_einval }, 8376131Sphk { &vop_bmap_desc, (vop_t *) vop_stdbmap }, 8430492Sphk { &vop_close_desc, (vop_t *) vop_null }, 8565770Sbp { &vop_createvobject_desc, (vop_t *) vop_stdcreatevobject }, 8665770Sbp { &vop_destroyvobject_desc, (vop_t *) vop_stddestroyvobject }, 8730492Sphk { &vop_fsync_desc, (vop_t *) vop_null }, 8876167Sphk { &vop_getpages_desc, (vop_t *) vop_stdgetpages }, 8965770Sbp { &vop_getvobject_desc, (vop_t *) vop_stdgetvobject }, 9064819Sphk { &vop_inactive_desc, (vop_t *) vop_stdinactive }, 9130492Sphk { &vop_ioctl_desc, (vop_t *) vop_enotty }, 9230496Sphk { &vop_islocked_desc, (vop_t *) vop_noislocked }, 9330739Sphk { &vop_lease_desc, (vop_t *) vop_null }, 9430496Sphk { &vop_lock_desc, (vop_t *) vop_nolock }, 9572594Sbde { &vop_lookup_desc, (vop_t *) vop_nolookup }, 9630492Sphk { &vop_open_desc, (vop_t *) vop_null }, 9730492Sphk { &vop_pathconf_desc, (vop_t *) vop_einval }, 9876167Sphk { &vop_putpages_desc, (vop_t *) vop_stdputpages }, 9930489Sphk { &vop_poll_desc, (vop_t *) vop_nopoll }, 10030492Sphk { &vop_readlink_desc, (vop_t *) vop_einval }, 10130489Sphk { &vop_revoke_desc, (vop_t *) vop_revoke }, 10230489Sphk { &vop_strategy_desc, (vop_t *) vop_nostrategy }, 10330496Sphk { &vop_unlock_desc, (vop_t *) vop_nounlock }, 10430489Sphk { NULL, NULL } 10530489Sphk}; 10630489Sphk 10730489Sphkstatic struct vnodeopv_desc default_vnodeop_opv_desc = 10830489Sphk { &default_vnodeop_p, default_vnodeop_entries }; 10930489Sphk 11030489SphkVNODEOP_SET(default_vnodeop_opv_desc); 11130489Sphk 11230489Sphkint 11330492Sphkvop_eopnotsupp(struct vop_generic_args *ap) 11430489Sphk{ 11530489Sphk /* 11630492Sphk printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 11730489Sphk */ 11830489Sphk 11930489Sphk return (EOPNOTSUPP); 12030489Sphk} 12130489Sphk 12230489Sphkint 12330492Sphkvop_ebadf(struct vop_generic_args *ap) 12430489Sphk{ 12530489Sphk 12630492Sphk return (EBADF); 12730492Sphk} 12830492Sphk 12930492Sphkint 13030492Sphkvop_enotty(struct vop_generic_args *ap) 13130492Sphk{ 13230492Sphk 13330492Sphk return (ENOTTY); 13430492Sphk} 13530492Sphk 13630492Sphkint 13730492Sphkvop_einval(struct vop_generic_args *ap) 13830492Sphk{ 13930492Sphk 14030492Sphk return (EINVAL); 14130492Sphk} 14230492Sphk 14330492Sphkint 14430492Sphkvop_null(struct vop_generic_args *ap) 14530492Sphk{ 14630492Sphk 14730492Sphk return (0); 14830492Sphk} 14930492Sphk 15030492Sphkint 15130492Sphkvop_defaultop(struct vop_generic_args *ap) 15230492Sphk{ 15330492Sphk 15430489Sphk return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap)); 15530489Sphk} 15630489Sphk 15741056Speterint 15841056Spetervop_panic(struct vop_generic_args *ap) 15941056Speter{ 16041056Speter 16172594Sbde panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); 16241056Speter} 16341056Speter 16472594Sbdestatic int 16572594Sbdevop_nolookup(ap) 16672594Sbde struct vop_lookup_args /* { 16772594Sbde struct vnode *a_dvp; 16872594Sbde struct vnode **a_vpp; 16972594Sbde struct componentname *a_cnp; 17072594Sbde } */ *ap; 17172594Sbde{ 17272594Sbde 17372594Sbde *ap->a_vpp = NULL; 17472594Sbde return (ENOTDIR); 17572594Sbde} 17672594Sbde 17746349Salc/* 17846349Salc * vop_nostrategy: 17946349Salc * 18046349Salc * Strategy routine for VFS devices that have none. 18146349Salc * 18258934Sphk * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy 18358345Sphk * routine. Typically this is done for a BIO_READ strategy call. 18458345Sphk * Typically B_INVAL is assumed to already be clear prior to a write 18558345Sphk * and should not be cleared manually unless you just made the buffer 18658934Sphk * invalid. BIO_ERROR should be cleared either way. 18746349Salc */ 18846349Salc 18930489Sphkstatic int 19030489Sphkvop_nostrategy (struct vop_strategy_args *ap) 19130489Sphk{ 19230489Sphk printf("No strategy for buffer at %p\n", ap->a_bp); 19337384Sjulian vprint("", ap->a_vp); 19430489Sphk vprint("", ap->a_bp->b_vp); 19558934Sphk ap->a_bp->b_ioflags |= BIO_ERROR; 19630489Sphk ap->a_bp->b_error = EOPNOTSUPP; 19759249Sphk bufdone(ap->a_bp); 19830489Sphk return (EOPNOTSUPP); 19930489Sphk} 20030492Sphk 20130492Sphkint 20230492Sphkvop_stdpathconf(ap) 20330492Sphk struct vop_pathconf_args /* { 20430492Sphk struct vnode *a_vp; 20530492Sphk int a_name; 20630492Sphk int *a_retval; 20730492Sphk } */ *ap; 20830492Sphk{ 20930492Sphk 21030492Sphk switch (ap->a_name) { 21130492Sphk case _PC_LINK_MAX: 21230492Sphk *ap->a_retval = LINK_MAX; 21330492Sphk return (0); 21430492Sphk case _PC_MAX_CANON: 21530492Sphk *ap->a_retval = MAX_CANON; 21630492Sphk return (0); 21730492Sphk case _PC_MAX_INPUT: 21830492Sphk *ap->a_retval = MAX_INPUT; 21930492Sphk return (0); 22030492Sphk case _PC_PIPE_BUF: 22130492Sphk *ap->a_retval = PIPE_BUF; 22230492Sphk return (0); 22330492Sphk case _PC_CHOWN_RESTRICTED: 22430492Sphk *ap->a_retval = 1; 22530492Sphk return (0); 22630492Sphk case _PC_VDISABLE: 22730492Sphk *ap->a_retval = _POSIX_VDISABLE; 22830492Sphk return (0); 22930492Sphk default: 23030492Sphk return (EINVAL); 23130492Sphk } 23230492Sphk /* NOTREACHED */ 23330492Sphk} 23430513Sphk 23530513Sphk/* 23630513Sphk * Standard lock, unlock and islocked functions. 23730513Sphk * 23830513Sphk * These depend on the lock structure being the first element in the 23930513Sphk * inode, ie: vp->v_data points to the the lock! 24030513Sphk */ 24130513Sphkint 24230513Sphkvop_stdlock(ap) 24330513Sphk struct vop_lock_args /* { 24430513Sphk struct vnode *a_vp; 24530513Sphk int a_flags; 24630513Sphk struct proc *a_p; 24730513Sphk } */ *ap; 24830513Sphk{ 24966355Sbp struct vnode *vp = ap->a_vp; 25030513Sphk 25142900Seivind#ifndef DEBUG_LOCKS 25266355Sbp return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, ap->a_p)); 25342900Seivind#else 25466355Sbp return (debuglockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock, 25566355Sbp ap->a_p, "vop_stdlock", vp->filename, vp->line)); 25642900Seivind#endif 25730513Sphk} 25830513Sphk 25930513Sphkint 26030513Sphkvop_stdunlock(ap) 26130513Sphk struct vop_unlock_args /* { 26230513Sphk struct vnode *a_vp; 26330513Sphk int a_flags; 26430513Sphk struct proc *a_p; 26530513Sphk } */ *ap; 26630513Sphk{ 26766355Sbp struct vnode *vp = ap->a_vp; 26830513Sphk 26966355Sbp return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, 27030513Sphk ap->a_p)); 27130513Sphk} 27230513Sphk 27330513Sphkint 27430513Sphkvop_stdislocked(ap) 27530513Sphk struct vop_islocked_args /* { 27630513Sphk struct vnode *a_vp; 27754444Seivind struct proc *a_p; 27830513Sphk } */ *ap; 27930513Sphk{ 28030513Sphk 28166355Sbp return (lockstatus(&ap->a_vp->v_lock, ap->a_p)); 28230513Sphk} 28330513Sphk 28464819Sphkint 28564819Sphkvop_stdinactive(ap) 28664819Sphk struct vop_inactive_args /* { 28764819Sphk struct vnode *a_vp; 28864819Sphk struct proc *a_p; 28964819Sphk } */ *ap; 29064819Sphk{ 29164819Sphk 29264819Sphk VOP_UNLOCK(ap->a_vp, 0, ap->a_p); 29364819Sphk return (0); 29464819Sphk} 29564819Sphk 29630743Sphk/* 29730743Sphk * Return true for select/poll. 29830743Sphk */ 29930743Sphkint 30030743Sphkvop_nopoll(ap) 30130743Sphk struct vop_poll_args /* { 30230743Sphk struct vnode *a_vp; 30330743Sphk int a_events; 30430743Sphk struct ucred *a_cred; 30530743Sphk struct proc *a_p; 30630743Sphk } */ *ap; 30730743Sphk{ 30830743Sphk /* 30931727Swollman * Return true for read/write. If the user asked for something 31031727Swollman * special, return POLLNVAL, so that clients have a way of 31131727Swollman * determining reliably whether or not the extended 31231727Swollman * functionality is present without hard-coding knowledge 31331727Swollman * of specific filesystem implementations. 31430743Sphk */ 31531727Swollman if (ap->a_events & ~POLLSTANDARD) 31631727Swollman return (POLLNVAL); 31731727Swollman 31830743Sphk return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 31930743Sphk} 32030743Sphk 32131727Swollman/* 32231727Swollman * Implement poll for local filesystems that support it. 32331727Swollman */ 32430743Sphkint 32531727Swollmanvop_stdpoll(ap) 32631727Swollman struct vop_poll_args /* { 32731727Swollman struct vnode *a_vp; 32831727Swollman int a_events; 32931727Swollman struct ucred *a_cred; 33031727Swollman struct proc *a_p; 33131727Swollman } */ *ap; 33231727Swollman{ 33376578Sjlemon if (ap->a_events & ~POLLSTANDARD) 33476578Sjlemon return (vn_pollrecord(ap->a_vp, ap->a_p, ap->a_events)); 33576578Sjlemon return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 33631727Swollman} 33731727Swollman 33830743Sphk/* 33930743Sphk * Stubs to use when there is no locking to be done on the underlying object. 34030743Sphk * A minimal shared lock is necessary to ensure that the underlying object 34130743Sphk * is not revoked while an operation is in progress. So, an active shared 34230743Sphk * count is maintained in an auxillary vnode lock structure. 34330743Sphk */ 34430743Sphkint 34530743Sphkvop_sharedlock(ap) 34630743Sphk struct vop_lock_args /* { 34730743Sphk struct vnode *a_vp; 34830743Sphk int a_flags; 34930743Sphk struct proc *a_p; 35030743Sphk } */ *ap; 35130743Sphk{ 35230743Sphk /* 35330743Sphk * This code cannot be used until all the non-locking filesystems 35430743Sphk * (notably NFS) are converted to properly lock and release nodes. 35530743Sphk * Also, certain vnode operations change the locking state within 35630743Sphk * the operation (create, mknod, remove, link, rename, mkdir, rmdir, 35730743Sphk * and symlink). Ideally these operations should not change the 35830743Sphk * lock state, but should be changed to let the caller of the 35930743Sphk * function unlock them. Otherwise all intermediate vnode layers 36030743Sphk * (such as union, umapfs, etc) must catch these functions to do 36130743Sphk * the necessary locking at their layer. Note that the inactive 36230743Sphk * and lookup operations also change their lock state, but this 36330743Sphk * cannot be avoided, so these two operations will always need 36430743Sphk * to be handled in intermediate layers. 36530743Sphk */ 36630743Sphk struct vnode *vp = ap->a_vp; 36730743Sphk int vnflags, flags = ap->a_flags; 36830743Sphk 36930743Sphk switch (flags & LK_TYPE_MASK) { 37030743Sphk case LK_DRAIN: 37130743Sphk vnflags = LK_DRAIN; 37230743Sphk break; 37330743Sphk case LK_EXCLUSIVE: 37430743Sphk#ifdef DEBUG_VFS_LOCKS 37530743Sphk /* 37630743Sphk * Normally, we use shared locks here, but that confuses 37730743Sphk * the locking assertions. 37830743Sphk */ 37930743Sphk vnflags = LK_EXCLUSIVE; 38030743Sphk break; 38130743Sphk#endif 38230743Sphk case LK_SHARED: 38330743Sphk vnflags = LK_SHARED; 38430743Sphk break; 38530743Sphk case LK_UPGRADE: 38630743Sphk case LK_EXCLUPGRADE: 38730743Sphk case LK_DOWNGRADE: 38830743Sphk return (0); 38930743Sphk case LK_RELEASE: 39030743Sphk default: 39130743Sphk panic("vop_sharedlock: bad operation %d", flags & LK_TYPE_MASK); 39230743Sphk } 39330743Sphk if (flags & LK_INTERLOCK) 39430743Sphk vnflags |= LK_INTERLOCK; 39542900Seivind#ifndef DEBUG_LOCKS 39666355Sbp return (lockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_p)); 39742900Seivind#else 39866355Sbp return (debuglockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_p, 39942900Seivind "vop_sharedlock", vp->filename, vp->line)); 40042900Seivind#endif 40130743Sphk} 40230743Sphk 40330743Sphk/* 40430743Sphk * Stubs to use when there is no locking to be done on the underlying object. 40530743Sphk * A minimal shared lock is necessary to ensure that the underlying object 40630743Sphk * is not revoked while an operation is in progress. So, an active shared 40730743Sphk * count is maintained in an auxillary vnode lock structure. 40830743Sphk */ 40930743Sphkint 41030743Sphkvop_nolock(ap) 41130743Sphk struct vop_lock_args /* { 41230743Sphk struct vnode *a_vp; 41330743Sphk int a_flags; 41430743Sphk struct proc *a_p; 41530743Sphk } */ *ap; 41630743Sphk{ 41730743Sphk#ifdef notyet 41830743Sphk /* 41930743Sphk * This code cannot be used until all the non-locking filesystems 42030743Sphk * (notably NFS) are converted to properly lock and release nodes. 42130743Sphk * Also, certain vnode operations change the locking state within 42230743Sphk * the operation (create, mknod, remove, link, rename, mkdir, rmdir, 42330743Sphk * and symlink). Ideally these operations should not change the 42430743Sphk * lock state, but should be changed to let the caller of the 42530743Sphk * function unlock them. Otherwise all intermediate vnode layers 42630743Sphk * (such as union, umapfs, etc) must catch these functions to do 42730743Sphk * the necessary locking at their layer. Note that the inactive 42830743Sphk * and lookup operations also change their lock state, but this 42930743Sphk * cannot be avoided, so these two operations will always need 43030743Sphk * to be handled in intermediate layers. 43130743Sphk */ 43230743Sphk struct vnode *vp = ap->a_vp; 43330743Sphk int vnflags, flags = ap->a_flags; 43430743Sphk 43530743Sphk switch (flags & LK_TYPE_MASK) { 43630743Sphk case LK_DRAIN: 43730743Sphk vnflags = LK_DRAIN; 43830743Sphk break; 43930743Sphk case LK_EXCLUSIVE: 44030743Sphk case LK_SHARED: 44130743Sphk vnflags = LK_SHARED; 44230743Sphk break; 44330743Sphk case LK_UPGRADE: 44430743Sphk case LK_EXCLUPGRADE: 44530743Sphk case LK_DOWNGRADE: 44630743Sphk return (0); 44730743Sphk case LK_RELEASE: 44830743Sphk default: 44930743Sphk panic("vop_nolock: bad operation %d", flags & LK_TYPE_MASK); 45030743Sphk } 45130743Sphk if (flags & LK_INTERLOCK) 45230743Sphk vnflags |= LK_INTERLOCK; 45366355Sbp return(lockmgr(&vp->v_lock, vnflags, &vp->v_interlock, ap->a_p)); 45430743Sphk#else /* for now */ 45530743Sphk /* 45630743Sphk * Since we are not using the lock manager, we must clear 45730743Sphk * the interlock here. 45830743Sphk */ 45931263Sbde if (ap->a_flags & LK_INTERLOCK) 46072200Sbmilekic mtx_unlock(&ap->a_vp->v_interlock); 46130743Sphk return (0); 46230743Sphk#endif 46330743Sphk} 46430743Sphk 46530743Sphk/* 46630743Sphk * Do the inverse of vop_nolock, handling the interlock in a compatible way. 46730743Sphk */ 46830743Sphkint 46930743Sphkvop_nounlock(ap) 47030743Sphk struct vop_unlock_args /* { 47130743Sphk struct vnode *a_vp; 47230743Sphk int a_flags; 47330743Sphk struct proc *a_p; 47430743Sphk } */ *ap; 47530743Sphk{ 47630743Sphk 47766355Sbp /* 47866355Sbp * Since we are not using the lock manager, we must clear 47966355Sbp * the interlock here. 48066355Sbp */ 48166355Sbp if (ap->a_flags & LK_INTERLOCK) 48272200Sbmilekic mtx_unlock(&ap->a_vp->v_interlock); 48366355Sbp return (0); 48430743Sphk} 48530743Sphk 48630743Sphk/* 48730743Sphk * Return whether or not the node is in use. 48830743Sphk */ 48930743Sphkint 49030743Sphkvop_noislocked(ap) 49130743Sphk struct vop_islocked_args /* { 49230743Sphk struct vnode *a_vp; 49354444Seivind struct proc *a_p; 49430743Sphk } */ *ap; 49530743Sphk{ 49630743Sphk 49766355Sbp return (0); 49830743Sphk} 49930743Sphk 50062976Smckusick/* 50162976Smckusick * Return our mount point, as we will take charge of the writes. 50262976Smckusick */ 50362976Smckusickint 50462976Smckusickvop_stdgetwritemount(ap) 50562976Smckusick struct vop_getwritemount_args /* { 50662976Smckusick struct vnode *a_vp; 50762976Smckusick struct mount **a_mpp; 50862976Smckusick } */ *ap; 50962976Smckusick{ 51062976Smckusick 51162976Smckusick *(ap->a_mpp) = ap->a_vp->v_mount; 51262976Smckusick return (0); 51362976Smckusick} 51462976Smckusick 51565770Sbpint 51665770Sbpvop_stdcreatevobject(ap) 51765770Sbp struct vop_createvobject_args /* { 51865770Sbp struct vnode *vp; 51965770Sbp struct ucred *cred; 52065770Sbp struct proc *p; 52165770Sbp } */ *ap; 52265770Sbp{ 52365770Sbp struct vnode *vp = ap->a_vp; 52465770Sbp struct ucred *cred = ap->a_cred; 52565770Sbp struct proc *p = ap->a_p; 52665770Sbp struct vattr vat; 52765770Sbp vm_object_t object; 52865770Sbp int error = 0; 52965770Sbp 53079224Sdillon GIANT_REQUIRED; 53179224Sdillon 53265770Sbp if (!vn_isdisk(vp, NULL) && vn_canvmio(vp) == FALSE) 53365770Sbp return (0); 53465770Sbp 53565770Sbpretry: 53665770Sbp if ((object = vp->v_object) == NULL) { 53765770Sbp if (vp->v_type == VREG || vp->v_type == VDIR) { 53865770Sbp if ((error = VOP_GETATTR(vp, &vat, cred, p)) != 0) 53965770Sbp goto retn; 54065770Sbp object = vnode_pager_alloc(vp, vat.va_size, 0, 0); 54165770Sbp } else if (devsw(vp->v_rdev) != NULL) { 54265770Sbp /* 54365770Sbp * This simply allocates the biggest object possible 54465770Sbp * for a disk vnode. This should be fixed, but doesn't 54565770Sbp * cause any problems (yet). 54665770Sbp */ 54765770Sbp object = vnode_pager_alloc(vp, IDX_TO_OFF(INT_MAX), 0, 0); 54865770Sbp } else { 54965770Sbp goto retn; 55065770Sbp } 55165770Sbp /* 55265770Sbp * Dereference the reference we just created. This assumes 55365770Sbp * that the object is associated with the vp. 55465770Sbp */ 55565770Sbp object->ref_count--; 55665770Sbp vp->v_usecount--; 55765770Sbp } else { 55865770Sbp if (object->flags & OBJ_DEAD) { 55965770Sbp VOP_UNLOCK(vp, 0, p); 56079224Sdillon tsleep(object, PVM, "vodead", 0); 56165770Sbp vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 56265770Sbp goto retry; 56365770Sbp } 56465770Sbp } 56565770Sbp 56665770Sbp KASSERT(vp->v_object != NULL, ("vfs_object_create: NULL object")); 56765770Sbp vp->v_flag |= VOBJBUF; 56865770Sbp 56965770Sbpretn: 57065770Sbp return (error); 57165770Sbp} 57265770Sbp 57365770Sbpint 57465770Sbpvop_stddestroyvobject(ap) 57565770Sbp struct vop_destroyvobject_args /* { 57665770Sbp struct vnode *vp; 57765770Sbp } */ *ap; 57865770Sbp{ 57965770Sbp struct vnode *vp = ap->a_vp; 58065770Sbp vm_object_t obj = vp->v_object; 58165770Sbp 58279224Sdillon GIANT_REQUIRED; 58379224Sdillon 58465770Sbp if (vp->v_object == NULL) 58565770Sbp return (0); 58665770Sbp 58765770Sbp if (obj->ref_count == 0) { 58865770Sbp /* 58965770Sbp * vclean() may be called twice. The first time 59065770Sbp * removes the primary reference to the object, 59165770Sbp * the second time goes one further and is a 59265770Sbp * special-case to terminate the object. 59365770Sbp */ 59465770Sbp vm_object_terminate(obj); 59565770Sbp } else { 59665770Sbp /* 59765770Sbp * Woe to the process that tries to page now :-). 59865770Sbp */ 59965770Sbp vm_pager_deallocate(obj); 60065770Sbp } 60165770Sbp return (0); 60265770Sbp} 60365770Sbp 60465770Sbpint 60565770Sbpvop_stdgetvobject(ap) 60665770Sbp struct vop_getvobject_args /* { 60765770Sbp struct vnode *vp; 60865770Sbp struct vm_object **objpp; 60965770Sbp } */ *ap; 61065770Sbp{ 61165770Sbp struct vnode *vp = ap->a_vp; 61265770Sbp struct vm_object **objpp = ap->a_objpp; 61365770Sbp 61465770Sbp if (objpp) 61565770Sbp *objpp = vp->v_object; 61665770Sbp return (vp->v_object ? 0 : EINVAL); 61765770Sbp} 61865770Sbp 61976131Sphkint 62076131Sphkvop_stdbmap(ap) 62176131Sphk struct vop_bmap_args /* { 62276131Sphk struct vnode *a_vp; 62376131Sphk daddr_t a_bn; 62476131Sphk struct vnode **a_vpp; 62576131Sphk daddr_t *a_bnp; 62676131Sphk int *a_runp; 62776131Sphk int *a_runb; 62876131Sphk } */ *ap; 62976131Sphk{ 63076131Sphk 63176131Sphk if (ap->a_vpp != NULL) 63276131Sphk *ap->a_vpp = ap->a_vp; 63376131Sphk if (ap->a_bnp != NULL) 63476131Sphk *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 63576131Sphk if (ap->a_runp != NULL) 63676131Sphk *ap->a_runp = 0; 63776131Sphk if (ap->a_runb != NULL) 63876131Sphk *ap->a_runb = 0; 63976131Sphk return (0); 64076131Sphk} 64176131Sphk 64276167Sphkint 64376167Sphkvop_stdgetpages(ap) 64476167Sphk struct vop_getpages_args /* { 64576167Sphk struct vnode *a_vp; 64676167Sphk vm_page_t *a_m; 64776167Sphk int a_count; 64876167Sphk int a_reqpage; 64976167Sphk vm_ooffset_t a_offset; 65076167Sphk } */ *ap; 65176167Sphk{ 65276131Sphk 65376167Sphk return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 65476167Sphk ap->a_count, ap->a_reqpage); 65576167Sphk} 65676167Sphk 65776319Sphkint 65876167Sphkvop_stdputpages(ap) 65976167Sphk struct vop_putpages_args /* { 66076167Sphk struct vnode *a_vp; 66176167Sphk vm_page_t *a_m; 66276167Sphk int a_count; 66376167Sphk int a_sync; 66476167Sphk int *a_rtvals; 66576167Sphk vm_ooffset_t a_offset; 66676167Sphk } */ *ap; 66776167Sphk{ 66876167Sphk 66976319Sphk return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 67076167Sphk ap->a_sync, ap->a_rtvals); 67176167Sphk} 67276167Sphk 67376167Sphk 67476167Sphk 67551068Salfred/* 67651068Salfred * vfs default ops 67751068Salfred * used to fill the vfs fucntion table to get reasonable default return values. 67851068Salfred */ 67951068Salfredint 68051068Salfredvfs_stdmount (mp, path, data, ndp, p) 68151068Salfred struct mount *mp; 68251068Salfred char *path; 68351068Salfred caddr_t data; 68451068Salfred struct nameidata *ndp; 68551068Salfred struct proc *p; 68651068Salfred{ 68751068Salfred return (0); 68851068Salfred} 68951068Salfred 69051068Salfredint 69151068Salfredvfs_stdunmount (mp, mntflags, p) 69251068Salfred struct mount *mp; 69351068Salfred int mntflags; 69451068Salfred struct proc *p; 69551068Salfred{ 69651068Salfred return (0); 69751068Salfred} 69851068Salfred 69951068Salfredint 70051068Salfredvfs_stdroot (mp, vpp) 70151068Salfred struct mount *mp; 70251068Salfred struct vnode **vpp; 70351068Salfred{ 70451068Salfred return (EOPNOTSUPP); 70551068Salfred} 70651068Salfred 70751068Salfredint 70851068Salfredvfs_stdstatfs (mp, sbp, p) 70951068Salfred struct mount *mp; 71051068Salfred struct statfs *sbp; 71151068Salfred struct proc *p; 71251068Salfred{ 71351068Salfred return (EOPNOTSUPP); 71451068Salfred} 71551068Salfred 71651068Salfredint 71751068Salfredvfs_stdvptofh (vp, fhp) 71851068Salfred struct vnode *vp; 71951068Salfred struct fid *fhp; 72051068Salfred{ 72151068Salfred return (EOPNOTSUPP); 72251068Salfred} 72351068Salfred 72451068Salfredint 72551068Salfredvfs_stdstart (mp, flags, p) 72651068Salfred struct mount *mp; 72751068Salfred int flags; 72851068Salfred struct proc *p; 72951068Salfred{ 73051068Salfred return (0); 73151068Salfred} 73251068Salfred 73351068Salfredint 73451068Salfredvfs_stdquotactl (mp, cmds, uid, arg, p) 73551068Salfred struct mount *mp; 73651068Salfred int cmds; 73751068Salfred uid_t uid; 73851068Salfred caddr_t arg; 73951068Salfred struct proc *p; 74051068Salfred{ 74151068Salfred return (EOPNOTSUPP); 74251068Salfred} 74351068Salfred 74451068Salfredint 74551068Salfredvfs_stdsync (mp, waitfor, cred, p) 74651068Salfred struct mount *mp; 74751068Salfred int waitfor; 74851068Salfred struct ucred *cred; 74951068Salfred struct proc *p; 75051068Salfred{ 75151068Salfred return (0); 75251068Salfred} 75351068Salfred 75451068Salfredint 75551068Salfredvfs_stdvget (mp, ino, vpp) 75651068Salfred struct mount *mp; 75751068Salfred ino_t ino; 75851068Salfred struct vnode **vpp; 75951068Salfred{ 76051068Salfred return (EOPNOTSUPP); 76151068Salfred} 76251068Salfred 76351068Salfredint 76451138Salfredvfs_stdfhtovp (mp, fhp, vpp) 76551068Salfred struct mount *mp; 76651068Salfred struct fid *fhp; 76751138Salfred struct vnode **vpp; 76851138Salfred{ 76951138Salfred return (EOPNOTSUPP); 77051138Salfred} 77151138Salfred 77251068Salfredint 77351068Salfredvfs_stdinit (vfsp) 77451068Salfred struct vfsconf *vfsp; 77551068Salfred{ 77651068Salfred return (0); 77751068Salfred} 77851068Salfred 77951068Salfredint 78051068Salfredvfs_stduninit (vfsp) 78151068Salfred struct vfsconf *vfsp; 78251068Salfred{ 78351068Salfred return(0); 78451068Salfred} 78551068Salfred 78654803Srwatsonint 78774437Srwatsonvfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname, p) 78854803Srwatson struct mount *mp; 78954803Srwatson int cmd; 79074273Srwatson struct vnode *filename_vp; 79174437Srwatson int attrnamespace; 79256272Srwatson const char *attrname; 79354803Srwatson struct proc *p; 79454803Srwatson{ 79554803Srwatson return(EOPNOTSUPP); 79654803Srwatson} 79754803Srwatson 79851068Salfred/* end of vfs default ops */ 799