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0fa2443f0e
This unifies several times in theory indentical 50 lines of code. The filesystems have a new method: vop_cachedlookup, which is the meat of the lookup, and use vfs_cache_lookup() for their vop_lookup method. vfs_cache_lookup() will check the namecache and pass on to the vop_cachedlookup method in case of a miss. It's still the task of the individual filesystems to populate the namecache with cache_enter(). Filesystems that do not use the namecache will just provide the vop_lookup method as usual.
1188 lines
32 KiB
C
1188 lines
32 KiB
C
/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
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* $Id: cd9660_vnops.c,v 1.36 1997/08/25 10:26:18 kato Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/kernel.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/buf.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <miscfs/specfs/specdev.h>
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#include <miscfs/fifofs/fifo.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <sys/unistd.h>
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#include <isofs/cd9660/iso.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/iso_rrip.h>
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static int cd9660_setattr __P((struct vop_setattr_args *));
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static int cd9660_open __P((struct vop_open_args *));
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static int cd9660_close __P((struct vop_close_args *));
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static int cd9660_access __P((struct vop_access_args *));
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static int cd9660_getattr __P((struct vop_getattr_args *));
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static int cd9660_read __P((struct vop_read_args *));
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static int cd9660_ioctl __P((struct vop_ioctl_args *));
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static int cd9660_select __P((struct vop_select_args *));
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static int cd9660_mmap __P((struct vop_mmap_args *));
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static int cd9660_seek __P((struct vop_seek_args *));
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struct isoreaddir;
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static int iso_uiodir __P((struct isoreaddir *idp, struct dirent *dp,
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off_t off));
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static int iso_shipdir __P((struct isoreaddir *idp));
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static int cd9660_readdir __P((struct vop_readdir_args *));
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static int cd9660_readlink __P((struct vop_readlink_args *ap));
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static int cd9660_abortop __P((struct vop_abortop_args *));
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static int cd9660_lock __P((struct vop_lock_args *));
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static int cd9660_unlock __P((struct vop_unlock_args *));
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static int cd9660_strategy __P((struct vop_strategy_args *));
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static int cd9660_print __P((struct vop_print_args *));
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static int cd9660_islocked __P((struct vop_islocked_args *));
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/*
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* Sysctl values for the cd9660 filesystem.
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*/
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#define CD9660_CLUSTERREAD 1 /* cluster reading enabled */
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#define CD9660_MAXID 2 /* number of valid cd9660 ids */
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#define CD9660_NAMES { \
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{0, 0}, \
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{ "doclusterread", CTLTYPE_INT}, \
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}
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/*
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* Setattr call. Only allowed for block and character special devices.
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*/
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int
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cd9660_setattr(ap)
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struct vop_setattr_args /* {
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struct vnodeop_desc *a_desc;
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struct vnode *a_vp;
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struct vattr *a_vap;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct vattr *vap = ap->a_vap;
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if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
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vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
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vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
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return (EROFS);
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if (vap->va_size != (u_quad_t)VNOVAL) {
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switch (vp->v_type) {
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case VDIR:
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return (EISDIR);
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case VLNK:
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case VREG:
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return (EROFS);
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case VCHR:
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case VBLK:
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case VSOCK:
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case VFIFO:
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return (0);
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}
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}
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return (0);
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}
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/*
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* Open called.
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*
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* Nothing to do.
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*/
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/* ARGSUSED */
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static int
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cd9660_open(ap)
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struct vop_open_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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return (0);
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}
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/*
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* Close called
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*
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* Update the times on the inode on writeable file systems.
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*/
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/* ARGSUSED */
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static int
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cd9660_close(ap)
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struct vop_close_args /* {
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struct vnode *a_vp;
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int a_fflag;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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return (0);
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}
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/*
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* Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
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* The mode is shifted to select the owner/group/other fields. The
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* super user is granted all permissions.
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*/
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/* ARGSUSED */
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static int
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cd9660_access(ap)
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struct vop_access_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct iso_node *ip = VTOI(vp);
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struct ucred *cred = ap->a_cred;
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mode_t mask, mode = ap->a_mode;
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gid_t *gp;
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int i;
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/*
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* Disallow write attempts unless the file is a socket,
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* fifo, or a block or character device resident on the
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* file system.
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*/
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if (mode & VWRITE) {
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switch (vp->v_type) {
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case VDIR:
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case VLNK:
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case VREG:
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return (EROFS);
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}
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}
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/* User id 0 always gets access. */
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if (cred->cr_uid == 0)
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return (0);
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mask = 0;
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/* Otherwise, check the owner. */
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if (cred->cr_uid == ip->inode.iso_uid) {
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if (mode & VEXEC)
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mask |= S_IXUSR;
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if (mode & VREAD)
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mask |= S_IRUSR;
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if (mode & VWRITE)
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mask |= S_IWUSR;
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return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
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}
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/* Otherwise, check the groups. */
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for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
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if (ip->inode.iso_gid == *gp) {
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if (mode & VEXEC)
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mask |= S_IXGRP;
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if (mode & VREAD)
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mask |= S_IRGRP;
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if (mode & VWRITE)
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mask |= S_IWGRP;
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return ((ip->inode.iso_mode & mask) == mask ?
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0 : EACCES);
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}
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/* Otherwise, check everyone else. */
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if (mode & VEXEC)
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mask |= S_IXOTH;
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if (mode & VREAD)
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mask |= S_IROTH;
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if (mode & VWRITE)
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mask |= S_IWOTH;
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return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
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}
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static int
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cd9660_getattr(ap)
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struct vop_getattr_args /* {
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struct vnode *a_vp;
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struct vattr *a_vap;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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register struct vattr *vap = ap->a_vap;
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register struct iso_node *ip = VTOI(vp);
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vap->va_fsid = ip->i_dev;
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vap->va_fileid = ip->i_number;
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vap->va_mode = ip->inode.iso_mode;
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vap->va_nlink = ip->inode.iso_links;
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vap->va_uid = ip->inode.iso_uid;
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vap->va_gid = ip->inode.iso_gid;
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vap->va_atime = ip->inode.iso_atime;
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vap->va_mtime = ip->inode.iso_mtime;
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vap->va_ctime = ip->inode.iso_ctime;
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vap->va_rdev = ip->inode.iso_rdev;
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vap->va_size = (u_quad_t) ip->i_size;
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if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
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struct vop_readlink_args rdlnk;
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struct iovec aiov;
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struct uio auio;
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char *cp;
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MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
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aiov.iov_base = cp;
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aiov.iov_len = MAXPATHLEN;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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auio.uio_offset = 0;
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auio.uio_rw = UIO_READ;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_procp = ap->a_p;
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auio.uio_resid = MAXPATHLEN;
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rdlnk.a_uio = &auio;
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rdlnk.a_vp = ap->a_vp;
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rdlnk.a_cred = ap->a_cred;
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if (cd9660_readlink(&rdlnk) == 0)
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vap->va_size = MAXPATHLEN - auio.uio_resid;
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FREE(cp, M_TEMP);
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}
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vap->va_flags = 0;
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vap->va_gen = 1;
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vap->va_blocksize = ip->i_mnt->logical_block_size;
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vap->va_bytes = (u_quad_t) ip->i_size;
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vap->va_type = vp->v_type;
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vap->va_filerev = 0;
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return (0);
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}
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static int cd9660_doclusterread = 1;
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SYSCTL_NODE(_vfs, MOUNT_CD9660, cd9660, CTLFLAG_RW, 0, "CD9660 filesystem");
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SYSCTL_INT(_vfs_cd9660, CD9660_CLUSTERREAD, doclusterread,
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CTLFLAG_RW, &cd9660_doclusterread, 0, "");
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/*
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* Vnode op for reading.
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*/
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static int
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cd9660_read(ap)
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struct vop_read_args /* {
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struct vnode *a_vp;
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struct uio *a_uio;
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int a_ioflag;
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struct ucred *a_cred;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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register struct uio *uio = ap->a_uio;
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register struct iso_node *ip = VTOI(vp);
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register struct iso_mnt *imp;
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struct buf *bp;
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daddr_t lbn, rablock;
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off_t diff;
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int rasize, error = 0;
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long size, n, on;
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if (uio->uio_resid == 0)
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return (0);
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if (uio->uio_offset < 0)
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return (EINVAL);
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ip->i_flag |= IN_ACCESS;
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imp = ip->i_mnt;
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do {
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lbn = lblkno(imp, uio->uio_offset);
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on = blkoff(imp, uio->uio_offset);
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n = min((u_int)(imp->logical_block_size - on),
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uio->uio_resid);
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diff = (off_t)ip->i_size - uio->uio_offset;
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if (diff <= 0)
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return (0);
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if (diff < n)
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n = diff;
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size = blksize(imp, ip, lbn);
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rablock = lbn + 1;
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if (cd9660_doclusterread) {
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if (lblktosize(imp, rablock) <= ip->i_size)
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error = cluster_read(vp, (off_t)ip->i_size,
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lbn, size, NOCRED, uio->uio_resid,
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(ap->a_ioflag >> 16), &bp);
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else
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error = bread(vp, lbn, size, NOCRED, &bp);
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} else {
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if (vp->v_lastr + 1 == lbn &&
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lblktosize(imp, rablock) < ip->i_size) {
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rasize = blksize(imp, ip, rablock);
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error = breadn(vp, lbn, size, &rablock,
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&rasize, 1, NOCRED, &bp);
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} else
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error = bread(vp, lbn, size, NOCRED, &bp);
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}
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vp->v_lastr = lbn;
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n = min(n, size - bp->b_resid);
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if (error) {
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brelse(bp);
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return (error);
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}
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error = uiomove(bp->b_data + on, (int)n, uio);
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brelse(bp);
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} while (error == 0 && uio->uio_resid > 0 && n != 0);
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return (error);
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}
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/* ARGSUSED */
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static int
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cd9660_ioctl(ap)
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struct vop_ioctl_args /* {
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struct vnode *a_vp;
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u_long a_command;
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caddr_t a_data;
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int a_fflag;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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printf("You did ioctl for isofs !!\n");
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return (ENOTTY);
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}
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/* ARGSUSED */
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static int
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cd9660_select(ap)
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struct vop_select_args /* {
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struct vnode *a_vp;
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int a_which;
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int a_fflags;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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/*
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* We should really check to see if I/O is possible.
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*/
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return (1);
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}
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/*
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* Mmap a file
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*
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* NB Currently unsupported.
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*/
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/* ARGSUSED */
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static int
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cd9660_mmap(ap)
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struct vop_mmap_args /* {
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struct vnode *a_vp;
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int a_fflags;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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return (EINVAL);
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}
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/*
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* Seek on a file
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*
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* Nothing to do, so just return.
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*/
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/* ARGSUSED */
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static int
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cd9660_seek(ap)
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struct vop_seek_args /* {
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struct vnode *a_vp;
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off_t a_oldoff;
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off_t a_newoff;
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struct ucred *a_cred;
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} */ *ap;
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{
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return (0);
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}
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|
/*
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|
* Structure for reading directories
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|
*/
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struct isoreaddir {
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struct dirent saveent;
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|
struct dirent assocent;
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|
struct dirent current;
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|
off_t saveoff;
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|
off_t assocoff;
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|
off_t curroff;
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struct uio *uio;
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off_t uio_off;
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int eofflag;
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u_long *cookies;
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int ncookies;
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};
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int
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iso_uiodir(idp,dp,off)
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struct isoreaddir *idp;
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struct dirent *dp;
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off_t off;
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{
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int error;
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dp->d_name[dp->d_namlen] = 0;
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dp->d_reclen = GENERIC_DIRSIZ(dp);
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if (idp->uio->uio_resid < dp->d_reclen) {
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idp->eofflag = 0;
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return (-1);
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}
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|
if (idp->cookies) {
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if (idp->ncookies <= 0) {
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idp->eofflag = 0;
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return (-1);
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}
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|
*idp->cookies++ = off;
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--idp->ncookies;
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}
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if (error = uiomove((caddr_t) dp,dp->d_reclen,idp->uio))
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|
return (error);
|
|
idp->uio_off = off;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
iso_shipdir(idp)
|
|
struct isoreaddir *idp;
|
|
{
|
|
struct dirent *dp;
|
|
int cl, sl, assoc;
|
|
int error;
|
|
char *cname, *sname;
|
|
|
|
cl = idp->current.d_namlen;
|
|
cname = idp->current.d_name;
|
|
assoc = (cl > 1) && (*cname == ASSOCCHAR);
|
|
if (assoc) {
|
|
cl--;
|
|
cname++;
|
|
}
|
|
|
|
dp = &idp->saveent;
|
|
sname = dp->d_name;
|
|
if (!(sl = dp->d_namlen)) {
|
|
dp = &idp->assocent;
|
|
sname = dp->d_name + 1;
|
|
sl = dp->d_namlen - 1;
|
|
}
|
|
if (sl > 0) {
|
|
if (sl != cl
|
|
|| bcmp(sname,cname,sl)) {
|
|
if (idp->assocent.d_namlen) {
|
|
if (error = iso_uiodir(idp,&idp->assocent,idp->assocoff))
|
|
return (error);
|
|
idp->assocent.d_namlen = 0;
|
|
}
|
|
if (idp->saveent.d_namlen) {
|
|
if (error = iso_uiodir(idp,&idp->saveent,idp->saveoff))
|
|
return (error);
|
|
idp->saveent.d_namlen = 0;
|
|
}
|
|
}
|
|
}
|
|
idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
|
|
if (assoc) {
|
|
idp->assocoff = idp->curroff;
|
|
bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
|
|
} else {
|
|
idp->saveoff = idp->curroff;
|
|
bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Vnode op for readdir
|
|
*/
|
|
static int
|
|
cd9660_readdir(ap)
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
int *a_ncookies;
|
|
u_long *a_cookies;
|
|
} */ *ap;
|
|
{
|
|
register struct uio *uio = ap->a_uio;
|
|
struct isoreaddir *idp;
|
|
struct vnode *vdp = ap->a_vp;
|
|
struct iso_node *dp;
|
|
struct iso_mnt *imp;
|
|
struct buf *bp = NULL;
|
|
struct iso_directory_record *ep;
|
|
int entryoffsetinblock;
|
|
doff_t endsearch;
|
|
u_long bmask;
|
|
int error = 0;
|
|
int reclen;
|
|
u_short namelen;
|
|
int ncookies = 0;
|
|
u_long *cookies = NULL;
|
|
|
|
dp = VTOI(vdp);
|
|
imp = dp->i_mnt;
|
|
bmask = imp->im_bmask;
|
|
|
|
MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
|
|
idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
|
|
/*
|
|
* XXX
|
|
* Is it worth trying to figure out the type?
|
|
*/
|
|
idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
|
|
DT_UNKNOWN;
|
|
idp->uio = uio;
|
|
if (ap->a_ncookies == NULL) {
|
|
idp->cookies = NULL;
|
|
} else {
|
|
/*
|
|
* Guess the number of cookies needed.
|
|
*/
|
|
ncookies = uio->uio_resid / 16;
|
|
MALLOC(cookies, u_long *, ncookies * sizeof(u_int), M_TEMP,
|
|
M_WAITOK);
|
|
idp->cookies = cookies;
|
|
idp->ncookies = ncookies;
|
|
}
|
|
idp->eofflag = 1;
|
|
idp->curroff = uio->uio_offset;
|
|
|
|
if ((entryoffsetinblock = idp->curroff & bmask) &&
|
|
(error = VOP_BLKATOFF(vdp, (off_t)idp->curroff, NULL, &bp))) {
|
|
FREE(idp, M_TEMP);
|
|
return (error);
|
|
}
|
|
endsearch = dp->i_size;
|
|
|
|
while (idp->curroff < endsearch) {
|
|
/*
|
|
* If offset is on a block boundary,
|
|
* read the next directory block.
|
|
* Release previous if it exists.
|
|
*/
|
|
if ((idp->curroff & bmask) == 0) {
|
|
if (bp != NULL)
|
|
brelse(bp);
|
|
if (error =
|
|
VOP_BLKATOFF(vdp, (off_t)idp->curroff, NULL, &bp))
|
|
break;
|
|
entryoffsetinblock = 0;
|
|
}
|
|
/*
|
|
* Get pointer to next entry.
|
|
*/
|
|
ep = (struct iso_directory_record *)
|
|
((char *)bp->b_data + entryoffsetinblock);
|
|
|
|
reclen = isonum_711(ep->length);
|
|
if (reclen == 0) {
|
|
/* skip to next block, if any */
|
|
idp->curroff =
|
|
(idp->curroff & ~bmask) + imp->logical_block_size;
|
|
continue;
|
|
}
|
|
|
|
if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
|
|
error = EINVAL;
|
|
/* illegal entry, stop */
|
|
break;
|
|
}
|
|
|
|
if (entryoffsetinblock + reclen > imp->logical_block_size) {
|
|
error = EINVAL;
|
|
/* illegal directory, so stop looking */
|
|
break;
|
|
}
|
|
|
|
idp->current.d_namlen = isonum_711(ep->name_len);
|
|
|
|
if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
|
|
error = EINVAL;
|
|
/* illegal entry, stop */
|
|
break;
|
|
}
|
|
|
|
if (isonum_711(ep->flags)&2)
|
|
idp->current.d_fileno = isodirino(ep, imp);
|
|
else
|
|
idp->current.d_fileno = dbtob(bp->b_blkno) +
|
|
entryoffsetinblock;
|
|
|
|
idp->curroff += reclen;
|
|
|
|
switch (imp->iso_ftype) {
|
|
case ISO_FTYPE_RRIP:
|
|
cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
|
|
&idp->current.d_fileno,imp);
|
|
idp->current.d_namlen = (u_char)namelen;
|
|
if (idp->current.d_namlen)
|
|
error = iso_uiodir(idp,&idp->current,idp->curroff);
|
|
break;
|
|
default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
|
|
strcpy(idp->current.d_name,"..");
|
|
switch (ep->name[0]) {
|
|
case 0:
|
|
idp->current.d_namlen = 1;
|
|
error = iso_uiodir(idp,&idp->current,idp->curroff);
|
|
break;
|
|
case 1:
|
|
idp->current.d_namlen = 2;
|
|
error = iso_uiodir(idp,&idp->current,idp->curroff);
|
|
break;
|
|
default:
|
|
isofntrans(ep->name,idp->current.d_namlen,
|
|
idp->current.d_name, &namelen,
|
|
imp->iso_ftype == ISO_FTYPE_9660,
|
|
isonum_711(ep->flags)&4);
|
|
idp->current.d_namlen = (u_char)namelen;
|
|
if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
|
|
error = iso_shipdir(idp);
|
|
else
|
|
error = iso_uiodir(idp,&idp->current,idp->curroff);
|
|
break;
|
|
}
|
|
}
|
|
if (error)
|
|
break;
|
|
|
|
entryoffsetinblock += reclen;
|
|
}
|
|
|
|
if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
|
|
idp->current.d_namlen = 0;
|
|
error = iso_shipdir(idp);
|
|
}
|
|
if (error < 0)
|
|
error = 0;
|
|
|
|
if (ap->a_ncookies != NULL) {
|
|
if (error)
|
|
free(cookies, M_TEMP);
|
|
else {
|
|
/*
|
|
* Work out the number of cookies actually used.
|
|
*/
|
|
*ap->a_ncookies = ncookies - idp->ncookies;
|
|
*ap->a_cookies = cookies;
|
|
}
|
|
}
|
|
|
|
if (bp)
|
|
brelse (bp);
|
|
|
|
uio->uio_offset = idp->uio_off;
|
|
*ap->a_eofflag = idp->eofflag;
|
|
|
|
FREE(idp, M_TEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link
|
|
* Shouldn't we get the parent vnode and read the data from there?
|
|
* This could eventually result in deadlocks in cd9660_lookup.
|
|
* But otherwise the block read here is in the block buffer two times.
|
|
*/
|
|
typedef struct iso_directory_record ISODIR;
|
|
typedef struct iso_node ISONODE;
|
|
typedef struct iso_mnt ISOMNT;
|
|
static int
|
|
cd9660_readlink(ap)
|
|
struct vop_readlink_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
ISONODE *ip;
|
|
ISODIR *dirp;
|
|
ISOMNT *imp;
|
|
struct buf *bp;
|
|
struct uio *uio;
|
|
u_short symlen;
|
|
int error;
|
|
char *symname;
|
|
|
|
ip = VTOI(ap->a_vp);
|
|
imp = ip->i_mnt;
|
|
uio = ap->a_uio;
|
|
|
|
if (imp->iso_ftype != ISO_FTYPE_RRIP)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Get parents directory record block that this inode included.
|
|
*/
|
|
error = bread(imp->im_devvp,
|
|
(ip->i_number >> imp->im_bshift) <<
|
|
(imp->im_bshift - DEV_BSHIFT),
|
|
imp->logical_block_size, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Setup the directory pointer for this inode
|
|
*/
|
|
dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
|
|
|
|
/*
|
|
* Just make sure, we have a right one....
|
|
* 1: Check not cross boundary on block
|
|
*/
|
|
if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
|
|
> (unsigned)imp->logical_block_size) {
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Now get a buffer
|
|
* Abuse a namei buffer for now.
|
|
*/
|
|
if (uio->uio_segflg == UIO_SYSSPACE)
|
|
symname = uio->uio_iov->iov_base;
|
|
else
|
|
MALLOC(symname, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
|
|
|
|
/*
|
|
* Ok, we just gathering a symbolic name in SL record.
|
|
*/
|
|
if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
|
|
if (uio->uio_segflg != UIO_SYSSPACE)
|
|
FREE(symname, M_NAMEI);
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
/*
|
|
* Don't forget before you leave from home ;-)
|
|
*/
|
|
brelse(bp);
|
|
|
|
/*
|
|
* return with the symbolic name to caller's.
|
|
*/
|
|
if (uio->uio_segflg != UIO_SYSSPACE) {
|
|
error = uiomove(symname, symlen, uio);
|
|
FREE(symname, M_NAMEI);
|
|
return (error);
|
|
}
|
|
uio->uio_resid -= symlen;
|
|
uio->uio_iov->iov_base += symlen;
|
|
uio->uio_iov->iov_len -= symlen;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Ufs abort op, called after namei() when a CREATE/DELETE isn't actually
|
|
* done. If a buffer has been saved in anticipation of a CREATE, delete it.
|
|
*/
|
|
static int
|
|
cd9660_abortop(ap)
|
|
struct vop_abortop_args /* {
|
|
struct vnode *a_dvp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap;
|
|
{
|
|
if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
|
|
FREE(ap->a_cnp->cn_pnbuf, M_NAMEI);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Lock an inode.
|
|
*/
|
|
static int
|
|
cd9660_lock(ap)
|
|
struct vop_lock_args /* {
|
|
struct vnode *a_vp;
|
|
int a_flags;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, &vp->v_interlock,
|
|
ap->a_p));
|
|
}
|
|
|
|
/*
|
|
* Unlock an inode.
|
|
*/
|
|
static int
|
|
cd9660_unlock(ap)
|
|
struct vop_unlock_args /* {
|
|
struct vnode *a_vp;
|
|
int a_flags;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE,
|
|
&vp->v_interlock, ap->a_p));
|
|
}
|
|
|
|
/*
|
|
* Calculate the logical to physical mapping if not done already,
|
|
* then call the device strategy routine.
|
|
*/
|
|
static int
|
|
cd9660_strategy(ap)
|
|
struct vop_strategy_args /* {
|
|
struct buf *a_bp;
|
|
} */ *ap;
|
|
{
|
|
register struct buf *bp = ap->a_bp;
|
|
register struct vnode *vp = bp->b_vp;
|
|
register struct iso_node *ip;
|
|
int error;
|
|
|
|
ip = VTOI(vp);
|
|
if (vp->v_type == VBLK || vp->v_type == VCHR)
|
|
panic("cd9660_strategy: spec");
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
if ((error =
|
|
VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL, NULL))) {
|
|
bp->b_error = error;
|
|
bp->b_flags |= B_ERROR;
|
|
biodone(bp);
|
|
return (error);
|
|
}
|
|
if ((long)bp->b_blkno == -1)
|
|
clrbuf(bp);
|
|
}
|
|
if ((long)bp->b_blkno == -1) {
|
|
biodone(bp);
|
|
return (0);
|
|
}
|
|
vp = ip->i_devvp;
|
|
bp->b_dev = vp->v_rdev;
|
|
VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Print out the contents of an inode.
|
|
*/
|
|
static int
|
|
cd9660_print(ap)
|
|
struct vop_print_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap;
|
|
{
|
|
|
|
printf("tag VT_ISOFS, isofs vnode\n");
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check for a locked inode.
|
|
*/
|
|
int
|
|
cd9660_islocked(ap)
|
|
struct vop_islocked_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap;
|
|
{
|
|
|
|
return (lockstatus(&VTOI(ap->a_vp)->i_lock));
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to cd9660 filesystems.
|
|
*/
|
|
int
|
|
cd9660_pathconf(ap)
|
|
struct vop_pathconf_args /* {
|
|
struct vnode *a_vp;
|
|
int a_name;
|
|
register_t *a_retval;
|
|
} */ *ap;
|
|
{
|
|
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NAME_MAX:
|
|
if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
|
|
*ap->a_retval = NAME_MAX;
|
|
else
|
|
*ap->a_retval = 37;
|
|
return (0);
|
|
case _PC_PATH_MAX:
|
|
*ap->a_retval = PATH_MAX;
|
|
return (0);
|
|
case _PC_PIPE_BUF:
|
|
*ap->a_retval = PIPE_BUF;
|
|
return (0);
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Global vfs data structures for isofs
|
|
*/
|
|
#define cd9660_create \
|
|
((int (*) __P((struct vop_create_args *)))eopnotsupp)
|
|
#define cd9660_mknod ((int (*) __P((struct vop_mknod_args *)))eopnotsupp)
|
|
#define cd9660_write ((int (*) __P((struct vop_write_args *)))eopnotsupp)
|
|
#ifdef NFS
|
|
#define cd9660_lease_check lease_check
|
|
#else
|
|
#define cd9660_lease_check ((int (*) __P((struct vop_lease_args *)))nullop)
|
|
#endif
|
|
#define cd9660_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
|
|
#define cd9660_remove \
|
|
((int (*) __P((struct vop_remove_args *)))eopnotsupp)
|
|
#define cd9660_link ((int (*) __P((struct vop_link_args *)))eopnotsupp)
|
|
#define cd9660_rename \
|
|
((int (*) __P((struct vop_rename_args *)))eopnotsupp)
|
|
#define cd9660_mkdir ((int (*) __P((struct vop_mkdir_args *)))eopnotsupp)
|
|
#define cd9660_rmdir ((int (*) __P((struct vop_rmdir_args *)))eopnotsupp)
|
|
#define cd9660_symlink \
|
|
((int (*) __P((struct vop_symlink_args *)))eopnotsupp)
|
|
#define cd9660_advlock \
|
|
((int (*) __P((struct vop_advlock_args *)))eopnotsupp)
|
|
#define cd9660_valloc ((int(*) __P(( \
|
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struct vnode *pvp, \
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int mode, \
|
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struct ucred *cred, \
|
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struct vnode **vpp))) eopnotsupp)
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|
#define cd9660_vfree ((int (*) __P((struct vop_vfree_args *)))eopnotsupp)
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#define cd9660_truncate \
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|
((int (*) __P((struct vop_truncate_args *)))eopnotsupp)
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#define cd9660_update \
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((int (*) __P((struct vop_update_args *)))eopnotsupp)
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|
#define cd9660_bwrite \
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|
((int (*) __P((struct vop_bwrite_args *)))eopnotsupp)
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|
|
|
/*
|
|
* Global vfs data structures for cd9660
|
|
*/
|
|
vop_t **cd9660_vnodeop_p;
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struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = {
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{ &vop_default_desc, (vop_t *)vn_default_error },
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{ &vop_lookup_desc, (vop_t *)vfs_cache_lookup }, /* lookup */
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{ &vop_cachedlookup_desc, (vop_t *)cd9660_lookup }, /* lookup */
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{ &vop_create_desc, (vop_t *)cd9660_create }, /* create */
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{ &vop_mknod_desc, (vop_t *)cd9660_mknod }, /* mknod */
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{ &vop_open_desc, (vop_t *)cd9660_open }, /* open */
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{ &vop_close_desc, (vop_t *)cd9660_close }, /* close */
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{ &vop_access_desc, (vop_t *)cd9660_access }, /* access */
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{ &vop_getattr_desc, (vop_t *)cd9660_getattr }, /* getattr */
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{ &vop_setattr_desc, (vop_t *)cd9660_setattr }, /* setattr */
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{ &vop_read_desc, (vop_t *)cd9660_read }, /* read */
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{ &vop_write_desc, (vop_t *)cd9660_write }, /* write */
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{ &vop_lease_desc, (vop_t *)cd9660_lease_check },/* lease */
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{ &vop_ioctl_desc, (vop_t *)cd9660_ioctl }, /* ioctl */
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{ &vop_select_desc, (vop_t *)cd9660_select }, /* select */
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{ &vop_revoke_desc, (vop_t *)cd9660_revoke }, /* revoke */
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{ &vop_mmap_desc, (vop_t *)cd9660_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)cd9660_fsync }, /* fsync */
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{ &vop_seek_desc, (vop_t *)cd9660_seek }, /* seek */
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{ &vop_remove_desc, (vop_t *)cd9660_remove }, /* remove */
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{ &vop_link_desc, (vop_t *)cd9660_link }, /* link */
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{ &vop_rename_desc, (vop_t *)cd9660_rename }, /* rename */
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{ &vop_mkdir_desc, (vop_t *)cd9660_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, (vop_t *)cd9660_rmdir }, /* rmdir */
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{ &vop_symlink_desc, (vop_t *)cd9660_symlink }, /* symlink */
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{ &vop_readdir_desc, (vop_t *)cd9660_readdir }, /* readdir */
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{ &vop_readlink_desc, (vop_t *)cd9660_readlink },/* readlink */
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{ &vop_abortop_desc, (vop_t *)cd9660_abortop }, /* abortop */
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{ &vop_inactive_desc, (vop_t *)cd9660_inactive },/* inactive */
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{ &vop_reclaim_desc, (vop_t *)cd9660_reclaim }, /* reclaim */
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{ &vop_lock_desc, (vop_t *)cd9660_lock }, /* lock */
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{ &vop_unlock_desc, (vop_t *)cd9660_unlock }, /* unlock */
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{ &vop_bmap_desc, (vop_t *)cd9660_bmap }, /* bmap */
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{ &vop_strategy_desc, (vop_t *)cd9660_strategy },/* strategy */
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{ &vop_print_desc, (vop_t *)cd9660_print }, /* print */
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|
{ &vop_islocked_desc, (vop_t *)cd9660_islocked },/* islocked */
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|
{ &vop_pathconf_desc, (vop_t *)cd9660_pathconf },/* pathconf */
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|
{ &vop_advlock_desc, (vop_t *)cd9660_advlock }, /* advlock */
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|
{ &vop_blkatoff_desc, (vop_t *)cd9660_blkatoff },/* blkatoff */
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|
{ &vop_valloc_desc, (vop_t *)cd9660_valloc }, /* valloc */
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|
{ &vop_vfree_desc, (vop_t *)cd9660_vfree }, /* vfree */
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|
{ &vop_truncate_desc, (vop_t *)cd9660_truncate },/* truncate */
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|
{ &vop_update_desc, (vop_t *)cd9660_update }, /* update */
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|
{ &vop_bwrite_desc, (vop_t *)vn_bwrite },
|
|
{ NULL, NULL }
|
|
};
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|
static struct vnodeopv_desc cd9660_vnodeop_opv_desc =
|
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{ &cd9660_vnodeop_p, cd9660_vnodeop_entries };
|
|
VNODEOP_SET(cd9660_vnodeop_opv_desc);
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|
|
|
/*
|
|
* Special device vnode ops
|
|
*/
|
|
vop_t **cd9660_specop_p;
|
|
struct vnodeopv_entry_desc cd9660_specop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *)vn_default_error },
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|
{ &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */
|
|
{ &vop_create_desc, (vop_t *)spec_create }, /* create */
|
|
{ &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */
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|
{ &vop_open_desc, (vop_t *)spec_open }, /* open */
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|
{ &vop_close_desc, (vop_t *)spec_close }, /* close */
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|
{ &vop_access_desc, (vop_t *)cd9660_access }, /* access */
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|
{ &vop_getattr_desc, (vop_t *)cd9660_getattr }, /* getattr */
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|
{ &vop_setattr_desc, (vop_t *)cd9660_setattr }, /* setattr */
|
|
{ &vop_read_desc, (vop_t *)spec_read }, /* read */
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|
{ &vop_write_desc, (vop_t *)spec_write }, /* write */
|
|
{ &vop_lease_desc, (vop_t *)spec_lease_check }, /* lease */
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|
{ &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */
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|
{ &vop_select_desc, (vop_t *)spec_select }, /* select */
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|
{ &vop_revoke_desc, (vop_t *)spec_revoke }, /* revoke */
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|
{ &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
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|
{ &vop_fsync_desc, (vop_t *)spec_fsync }, /* fsync */
|
|
{ &vop_seek_desc, (vop_t *)spec_seek }, /* seek */
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|
{ &vop_remove_desc, (vop_t *)spec_remove }, /* remove */
|
|
{ &vop_link_desc, (vop_t *)spec_link }, /* link */
|
|
{ &vop_rename_desc, (vop_t *)spec_rename }, /* rename */
|
|
{ &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */
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|
{ &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */
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|
{ &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */
|
|
{ &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */
|
|
{ &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */
|
|
{ &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */
|
|
{ &vop_inactive_desc, (vop_t *)cd9660_inactive },/* inactive */
|
|
{ &vop_reclaim_desc, (vop_t *)cd9660_reclaim }, /* reclaim */
|
|
{ &vop_lock_desc, (vop_t *)cd9660_lock }, /* lock */
|
|
{ &vop_unlock_desc, (vop_t *)cd9660_unlock }, /* unlock */
|
|
{ &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */
|
|
{ &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */
|
|
{ &vop_print_desc, (vop_t *)cd9660_print }, /* print */
|
|
{ &vop_islocked_desc, (vop_t *)cd9660_islocked },/* islocked */
|
|
{ &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */
|
|
{ &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */
|
|
{ &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */
|
|
{ &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */
|
|
{ &vop_vfree_desc, (vop_t *)spec_vfree }, /* vfree */
|
|
{ &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */
|
|
{ &vop_update_desc, (vop_t *)cd9660_update }, /* update */
|
|
{ &vop_bwrite_desc, (vop_t *)vn_bwrite },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc cd9660_specop_opv_desc =
|
|
{ &cd9660_specop_p, cd9660_specop_entries };
|
|
VNODEOP_SET(cd9660_specop_opv_desc);
|
|
|
|
vop_t **cd9660_fifoop_p;
|
|
struct vnodeopv_entry_desc cd9660_fifoop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *)vn_default_error },
|
|
{ &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */
|
|
{ &vop_create_desc, (vop_t *)fifo_create }, /* create */
|
|
{ &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */
|
|
{ &vop_open_desc, (vop_t *)fifo_open }, /* open */
|
|
{ &vop_close_desc, (vop_t *)fifo_close }, /* close */
|
|
{ &vop_access_desc, (vop_t *)cd9660_access }, /* access */
|
|
{ &vop_getattr_desc, (vop_t *)cd9660_getattr }, /* getattr */
|
|
{ &vop_setattr_desc, (vop_t *)cd9660_setattr }, /* setattr */
|
|
{ &vop_read_desc, (vop_t *)fifo_read }, /* read */
|
|
{ &vop_write_desc, (vop_t *)fifo_write }, /* write */
|
|
{ &vop_lease_desc, (vop_t *)fifo_lease_check }, /* lease */
|
|
{ &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */
|
|
{ &vop_select_desc, (vop_t *)fifo_select }, /* select */
|
|
{ &vop_revoke_desc, (vop_t *)fifo_revoke }, /* revoke */
|
|
{ &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */
|
|
{ &vop_fsync_desc, (vop_t *)fifo_fsync }, /* fsync */
|
|
{ &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */
|
|
{ &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */
|
|
{ &vop_link_desc, (vop_t *)fifo_link } , /* link */
|
|
{ &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */
|
|
{ &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */
|
|
{ &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */
|
|
{ &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */
|
|
{ &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */
|
|
{ &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */
|
|
{ &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */
|
|
{ &vop_inactive_desc, (vop_t *)cd9660_inactive },/* inactive */
|
|
{ &vop_reclaim_desc, (vop_t *)cd9660_reclaim }, /* reclaim */
|
|
{ &vop_lock_desc, (vop_t *)cd9660_lock }, /* lock */
|
|
{ &vop_unlock_desc, (vop_t *)cd9660_unlock }, /* unlock */
|
|
{ &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */
|
|
{ &vop_strategy_desc, (vop_t *)fifo_strategy }, /* strategy */
|
|
{ &vop_print_desc, (vop_t *)cd9660_print }, /* print */
|
|
{ &vop_islocked_desc, (vop_t *)cd9660_islocked },/* islocked */
|
|
{ &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */
|
|
{ &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */
|
|
{ &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */
|
|
{ &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */
|
|
{ &vop_vfree_desc, (vop_t *)fifo_vfree }, /* vfree */
|
|
{ &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */
|
|
{ &vop_update_desc, (vop_t *)cd9660_update }, /* update */
|
|
{ &vop_bwrite_desc, (vop_t *)vn_bwrite },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc cd9660_fifoop_opv_desc =
|
|
{ &cd9660_fifoop_p, cd9660_fifoop_entries };
|
|
|
|
VNODEOP_SET(cd9660_fifoop_opv_desc);
|