vfs_default.c revision 30513
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 * 3830489Sphk */ 3930489Sphk 4030489Sphk#include <sys/param.h> 4130489Sphk#include <sys/systm.h> 4230489Sphk#include <sys/kernel.h> 4330489Sphk#include <sys/mount.h> 4430492Sphk#include <sys/unistd.h> 4530489Sphk#include <sys/vnode.h> 4630489Sphk 4730489Sphkstatic int vop_nostrategy __P((struct vop_strategy_args *)); 4830489Sphk 4930489Sphk/* 5030489Sphk * This vnode table stores what we want to do if the filesystem doesn't 5130489Sphk * implement a particular VOP. 5230489Sphk * 5330489Sphk * If there is no specific entry here, we will return EOPNOTSUPP. 5430489Sphk * 5530489Sphk */ 5630489Sphk 5730489Sphkvop_t **default_vnodeop_p; 5830489Sphkstatic struct vnodeopv_entry_desc default_vnodeop_entries[] = { 5930492Sphk { &vop_default_desc, (vop_t *) vop_eopnotsupp }, 6030489Sphk { &vop_abortop_desc, (vop_t *) nullop }, 6130492Sphk { &vop_advlock_desc, (vop_t *) vop_einval }, 6230489Sphk { &vop_bwrite_desc, (vop_t *) vn_bwrite }, 6330492Sphk { &vop_close_desc, (vop_t *) vop_null }, 6430492Sphk { &vop_fsync_desc, (vop_t *) vop_null }, 6530492Sphk { &vop_ioctl_desc, (vop_t *) vop_enotty }, 6630496Sphk { &vop_islocked_desc, (vop_t *) vop_noislocked }, 6730489Sphk { &vop_lease_desc, (vop_t *) lease_check }, 6830496Sphk { &vop_lock_desc, (vop_t *) vop_nolock }, 6930492Sphk { &vop_mmap_desc, (vop_t *) vop_einval }, 7030492Sphk { &vop_open_desc, (vop_t *) vop_null }, 7130492Sphk { &vop_pathconf_desc, (vop_t *) vop_einval }, 7230489Sphk { &vop_poll_desc, (vop_t *) vop_nopoll }, 7330492Sphk { &vop_readlink_desc, (vop_t *) vop_einval }, 7430492Sphk { &vop_reallocblks_desc, (vop_t *) vop_eopnotsupp }, 7530489Sphk { &vop_revoke_desc, (vop_t *) vop_revoke }, 7630489Sphk { &vop_strategy_desc, (vop_t *) vop_nostrategy }, 7730496Sphk { &vop_unlock_desc, (vop_t *) vop_nounlock }, 7830489Sphk { NULL, NULL } 7930489Sphk}; 8030489Sphk 8130489Sphkstatic struct vnodeopv_desc default_vnodeop_opv_desc = 8230489Sphk { &default_vnodeop_p, default_vnodeop_entries }; 8330489Sphk 8430489SphkVNODEOP_SET(default_vnodeop_opv_desc); 8530489Sphk 8630489Sphkint 8730492Sphkvop_eopnotsupp(struct vop_generic_args *ap) 8830489Sphk{ 8930489Sphk /* 9030492Sphk printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 9130489Sphk */ 9230489Sphk 9330489Sphk return (EOPNOTSUPP); 9430489Sphk} 9530489Sphk 9630489Sphkint 9730492Sphkvop_ebadf(struct vop_generic_args *ap) 9830489Sphk{ 9930489Sphk 10030492Sphk return (EBADF); 10130492Sphk} 10230492Sphk 10330492Sphkint 10430492Sphkvop_enotty(struct vop_generic_args *ap) 10530492Sphk{ 10630492Sphk 10730492Sphk return (ENOTTY); 10830492Sphk} 10930492Sphk 11030492Sphkint 11130492Sphkvop_einval(struct vop_generic_args *ap) 11230492Sphk{ 11330492Sphk 11430492Sphk return (EINVAL); 11530492Sphk} 11630492Sphk 11730492Sphkint 11830492Sphkvop_null(struct vop_generic_args *ap) 11930492Sphk{ 12030492Sphk 12130492Sphk return (0); 12230492Sphk} 12330492Sphk 12430492Sphkint 12530492Sphkvop_defaultop(struct vop_generic_args *ap) 12630492Sphk{ 12730492Sphk 12830489Sphk return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap)); 12930489Sphk} 13030489Sphk 13130489Sphkstatic int 13230489Sphkvop_nostrategy (struct vop_strategy_args *ap) 13330489Sphk{ 13430489Sphk printf("No strategy for buffer at %p\n", ap->a_bp); 13530489Sphk vprint("", ap->a_bp->b_vp); 13630489Sphk ap->a_bp->b_flags |= B_ERROR; 13730489Sphk ap->a_bp->b_error = EOPNOTSUPP; 13830489Sphk biodone(ap->a_bp); 13930489Sphk return (EOPNOTSUPP); 14030489Sphk} 14130492Sphk 14230492Sphkint 14330492Sphkvop_stdpathconf(ap) 14430492Sphk struct vop_pathconf_args /* { 14530492Sphk struct vnode *a_vp; 14630492Sphk int a_name; 14730492Sphk int *a_retval; 14830492Sphk } */ *ap; 14930492Sphk{ 15030492Sphk 15130492Sphk switch (ap->a_name) { 15230492Sphk case _PC_LINK_MAX: 15330492Sphk *ap->a_retval = LINK_MAX; 15430492Sphk return (0); 15530492Sphk case _PC_MAX_CANON: 15630492Sphk *ap->a_retval = MAX_CANON; 15730492Sphk return (0); 15830492Sphk case _PC_MAX_INPUT: 15930492Sphk *ap->a_retval = MAX_INPUT; 16030492Sphk return (0); 16130492Sphk case _PC_PIPE_BUF: 16230492Sphk *ap->a_retval = PIPE_BUF; 16330492Sphk return (0); 16430492Sphk case _PC_CHOWN_RESTRICTED: 16530492Sphk *ap->a_retval = 1; 16630492Sphk return (0); 16730492Sphk case _PC_VDISABLE: 16830492Sphk *ap->a_retval = _POSIX_VDISABLE; 16930492Sphk return (0); 17030492Sphk default: 17130492Sphk return (EINVAL); 17230492Sphk } 17330492Sphk /* NOTREACHED */ 17430492Sphk} 17530513Sphk 17630513Sphk/* 17730513Sphk * Standard lock, unlock and islocked functions. 17830513Sphk * 17930513Sphk * These depend on the lock structure being the first element in the 18030513Sphk * inode, ie: vp->v_data points to the the lock! 18130513Sphk */ 18230513Sphkint 18330513Sphkvop_stdlock(ap) 18430513Sphk struct vop_lock_args /* { 18530513Sphk struct vnode *a_vp; 18630513Sphk int a_flags; 18730513Sphk struct proc *a_p; 18830513Sphk } */ *ap; 18930513Sphk{ 19030513Sphk struct lock *l = (struct lock*)ap->a_vp->v_data; 19130513Sphk 19230513Sphk return (lockmgr(l, ap->a_flags, &ap->a_vp->v_interlock, ap->a_p)); 19330513Sphk} 19430513Sphk 19530513Sphkint 19630513Sphkvop_stdunlock(ap) 19730513Sphk struct vop_unlock_args /* { 19830513Sphk struct vnode *a_vp; 19930513Sphk int a_flags; 20030513Sphk struct proc *a_p; 20130513Sphk } */ *ap; 20230513Sphk{ 20330513Sphk struct lock *l = (struct lock*)ap->a_vp->v_data; 20430513Sphk 20530513Sphk return (lockmgr(l, ap->a_flags | LK_RELEASE, &ap->a_vp->v_interlock, 20630513Sphk ap->a_p)); 20730513Sphk} 20830513Sphk 20930513Sphkint 21030513Sphkvop_stdislocked(ap) 21130513Sphk struct vop_islocked_args /* { 21230513Sphk struct vnode *a_vp; 21330513Sphk } */ *ap; 21430513Sphk{ 21530513Sphk struct lock *l = (struct lock*)ap->a_vp->v_data; 21630513Sphk 21730513Sphk return (lockstatus(l)); 21830513Sphk} 21930513Sphk 220