-/*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/* $NetBSD: cd9660_node.c,v 1.13 1994/12/24 15:30:07 cgd Exp $ */
-
-/*-
- * Copyright (c) 1982, 1986, 1989, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley
- * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
- * Support code is derived from software contributed to Berkeley
- * by Atsushi Murai (amurai@spec.co.jp).
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)cd9660_node.c 8.5 (Berkeley) 12/5/94
-
-
-
- * HISTORY
- * 22-Jan-98 radar 1669467 - ISO 9660 CD support - jwc
- * 17-Feb-98 radar 1669467 - changed lock protocols to use the lock manager - chw
-
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mount.h>
-#include <sys/proc.h>
-#include <sys/file.h>
-#include <sys/buf.h>
-#include <sys/vnode.h>
-#include <sys/kernel.h>
-#include <sys/malloc.h>
-#include <sys/stat.h>
-#include <sys/lock.h>
-#include <sys/namei.h>
-
-#include <isofs/cd9660/iso.h>
-#include <isofs/cd9660/cd9660_node.h>
-#include <isofs/cd9660/iso_rrip.h>
-#include <isofs/cd9660/cd9660_mount.h>
-
-/*
- * Structures associated with iso_node caching.
- */
-struct iso_node **isohashtbl;
-u_long isohash;
-#define INOHASH(device, inum) (((device) + ((inum)>>12)) & isohash)
-
-#ifdef ISODEVMAP
-struct iso_node **idvhashtbl;
-u_long idvhash;
-#define DNOHASH(device, inum) (((device) + ((inum)>>12)) & idvhash)
-#endif
-
-/* defined in bsd/vfs/vfs_subr.c */
-extern int prtactive; /* 1 => print out reclaim of active vnodes */
-
-extern u_char isonullname[];
-/*
- * Initialize hash links for inodes and dnodes.
- */
-int
-cd9660_init(__unused struct vfsconf *cp)
-{
- return 0;
-}
-
-int
-cd9660_hashinit(void)
-{
- if (!isohashtbl)
- isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash);
-#ifdef ISODEVMAP
- if (!idvhashtbl)
- idvhashtbl = hashinit(desiredvnodes / 8, M_ISOFSMNT, &idvhash);
-#endif
- return 0;
-}
-
-#ifdef ISODEVMAP
-/*
- * Enter a new node into the device hash list
- */
-struct iso_dnode *
-iso_dmap(dev_t device, ino_t inum, int create)
-{
- register struct iso_dnode **dpp, *dp, *dq;
-
- dpp = &idvhashtbl[DNOHASH(device, inum)];
- for (dp = *dpp;; dp = dp->d_next) {
- if (dp == NULL)
- return (NULL);
- if (inum == dp->i_number && device == dp->i_dev)
- return (dp);
-
- if (!create)
- return (NULL);
-
- MALLOC(dp, struct iso_dnode *, sizeof(struct iso_dnode), M_CACHE,
- M_WAITOK);
- dp->i_dev = dev;
- dp->i_number = ino;
-
- if (dq = *dpp)
- dq->d_prev = dp->d_next;
- dp->d_next = dq;
- dp->d_prev = dpp;
- *dpp = dp;
-
- return (dp);
-}
-
-void
-iso_dunmap(dev_t device)
-{
- struct iso_dnode **dpp, *dp, *dq;
-
- for (dpp = idvhashtbl; dpp <= idvhashtbl + idvhash; dpp++) {
- for (dp = *dpp; dp != NULL; dp = dq)
- dq = dp->d_next;
- if (device == dp->i_dev) {
- if (dq)
- dq->d_prev = dp->d_prev;
- *dp->d_prev = dq;
- FREE(dp, M_CACHE);
- }
- }
- }
-}
-#endif
-
-/*
- * Use the device/inum pair to find the incore inode, and return a pointer
- * to it. If it is in core, but locked, wait for it.
- */
-struct vnode *
-cd9660_ihashget(dev_t device, ino_t inum, __unused struct proc *p)
-{
- register struct iso_node *ip;
- struct vnode *vp;
- uint32_t vid;
-
-retry:
- for (ip = isohashtbl[INOHASH(device, inum)]; ip; ip = ip->i_next) {
- if (inum == ip->i_number && device == ip->i_dev) {
-
- if (ISSET(ip->i_flag, ISO_INALLOC)) {
- /*
- * inode is being created... wait for it
- * to be ready for consumption
- */
- SET(ip->i_flag, ISO_INWALLOC);
- tsleep((caddr_t)ip, PINOD, "cd9960_ihashget", 0);
- goto retry;
- }
- vp = ITOV(ip);
- /*
- * the vid needs to be grabbed before we drop
- * lock protecting the hash
- */
- vid = vnode_vid(vp);
-
- /*
- * we currently depend on running under the FS funnel
- * when we do proper locking and advertise ourselves
- * as thread safe, we'll need a lock to protect the
- * hash lookup... this is where we would drop it
- */
- if (vnode_getwithvid(vp, vid)) {
- /*
- * If vnode is being reclaimed, or has
- * already changed identity, no need to wait
- */
- return (NULL);
- }
- return (vp);
- }
- }
- return (NULL);
-}
-
-/*
- * Insert the inode into the hash table, and return it locked.
- */
-void
-cd9660_ihashins(struct iso_node *ip)
-{
- struct iso_node **ipp, *iq;
-
- /* lock the inode, then put it on the appropriate hash list */
-
- ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)];
- if ((iq = *ipp))
- iq->i_prev = &ip->i_next;
- ip->i_next = iq;
- ip->i_prev = ipp;
- *ipp = ip;
-}
-
-/*
- * Remove the inode from the hash table.
- */
-void
-cd9660_ihashrem(register struct iso_node *ip)
-{
- register struct iso_node *iq;
-
- if ((iq = ip->i_next))
- iq->i_prev = ip->i_prev;
- *ip->i_prev = iq;
-#if 1 /* was ifdef DIAGNOSTIC */
- ip->i_next = NULL;
- ip->i_prev = NULL;
-#endif
-}
-
-/*
- * Last reference to an inode... if we're done with
- * it, go ahead and recycle it for other use
- */
-int
-cd9660_inactive(struct vnop_inactive_args *ap)
-{
- vnode_t vp = ap->a_vp;
- struct iso_node *ip = VTOI(vp);
-
- /*
- * If we are done with the inode, reclaim it
- * so that it can be reused immediately.
- */
- if (ip->inode.iso_mode == 0)
- vnode_recycle(vp);
-
- return 0;
-}
-
-/*
- * Reclaim an inode so that it can be used for other purposes.
- */
-int
-cd9660_reclaim(struct vnop_reclaim_args *ap)
-{
- vnode_t vp = ap->a_vp;
- struct iso_node *ip = VTOI(vp);
-
- vnode_removefsref(vp);
- /*
- * Remove the inode from its hash chain.
- */
- cd9660_ihashrem(ip);
-
- if (ip->i_devvp) {
- vnode_t devvp = ip->i_devvp;
- ip->i_devvp = NULL;
- vnode_rele(devvp);
- }
- vnode_clearfsnode(vp);
-
- if (ip->i_namep != isonullname)
- FREE(ip->i_namep, M_TEMP);
- if (ip->i_riff != NULL)
- FREE(ip->i_riff, M_TEMP);
- FREE_ZONE(ip, sizeof(struct iso_node), M_ISOFSNODE);
-
- return (0);
-}
-
-/*
- * File attributes
- */
-void
-cd9660_defattr(struct iso_directory_record *isodir, struct iso_node *inop,
- struct buf *bp)
-{
- struct buf *bp2 = NULL;
- struct iso_mnt *imp;
- struct iso_extended_attributes *ap = NULL;
- int off;
-
- if ( isonum_711(isodir->flags) & directoryBit ) {
- inop->inode.iso_mode = S_IFDIR;
- /*
- * If we return 2, fts() will assume there are no subdirectories
- * (just links for the path and .), so instead we return 1.
- */
- inop->inode.iso_links = 1;
- } else {
- inop->inode.iso_mode = S_IFREG;
- inop->inode.iso_links = 1;
- }
- if (!bp
- && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
- && (off = isonum_711(isodir->ext_attr_length))) {
- cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, &bp2);
- bp = bp2;
- }
- if (bp) {
- ap = (struct iso_extended_attributes *)((char *)0 + buf_dataptr(bp));
-
- if (isonum_711(ap->version) == 1) {
- if (!(ap->perm[0]&0x40))
- inop->inode.iso_mode |= VEXEC >> 6;
- if (!(ap->perm[0]&0x10))
- inop->inode.iso_mode |= VREAD >> 6;
- if (!(ap->perm[0]&4))
- inop->inode.iso_mode |= VEXEC >> 3;
- if (!(ap->perm[0]&1))
- inop->inode.iso_mode |= VREAD >> 3;
- if (!(ap->perm[1]&0x40))
- inop->inode.iso_mode |= VEXEC;
- if (!(ap->perm[1]&0x10))
- inop->inode.iso_mode |= VREAD;
- inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
- inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
- } else
- ap = NULL;
- }
- if (!ap) {
- inop->inode.iso_mode |= VREAD|VWRITE|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
- inop->inode.iso_uid = ISO_UNKNOWNUID;
- inop->inode.iso_gid = ISO_UNKNOWNGID;
- }
- if (bp2)
- buf_brelse(bp2);
-}
-
-/*
- * Time stamps
- */
-void
-cd9660_deftstamp(struct iso_directory_record *isodir, struct iso_node *inop,
- struct buf *bp)
-{
- struct buf *bp2 = NULL;
- struct iso_mnt *imp;
- struct iso_extended_attributes *ap = NULL;
- int off;
-
- if (!bp
- && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
- && (off = isonum_711(isodir->ext_attr_length)))
- {
- cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL, &bp2);
- bp = bp2;
- }
- if (bp) {
- ap = (struct iso_extended_attributes *)((char *)0 + buf_dataptr(bp));
-
- if (isonum_711(ap->version) == 1) {
- if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
- cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
- if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
- inop->inode.iso_ctime = inop->inode.iso_atime;
- if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
- inop->inode.iso_mtime = inop->inode.iso_ctime;
- } else
- ap = NULL;
- }
- if (!ap) {
- cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime);
- inop->inode.iso_atime = inop->inode.iso_ctime;
- inop->inode.iso_mtime = inop->inode.iso_ctime;
- }
- if (bp2)
- buf_brelse(bp2);
-}
-
-int
-cd9660_tstamp_conv7(u_char *pi, struct timespec *pu)
-{
- int crtime, days;
- int y, m, d, hour, minute, second, mytz;
-
- y = pi[0] + 1900;
- m = pi[1];
- d = pi[2];
- hour = pi[3];
- minute = pi[4];
- second = pi[5];
- mytz = pi[6];
-
- if (y < 1970) {
- pu->tv_sec = 0;
- pu->tv_nsec = 0;
- return 0;
- } else {
-#ifdef ORIGINAL
- /* computes day number relative to Sept. 19th,1989 */
- /* don't even *THINK* about changing formula. It works! */
- days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
-#else
- /*
- * Changed :-) to make it relative to Jan. 1st, 1970
- * and to disambiguate negative division
- */
- days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
-#endif
- crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
-
- /* timezone offset is unreliable on some disks */
- if (-48 <= mytz && mytz <= 52)
- crtime -= mytz * 15 * 60;
- }
- pu->tv_sec = crtime;
- pu->tv_nsec = 0;
- return 1;
-}
-
-static u_int
-cd9660_chars2ui(u_char *begin, int len)
-{
- u_int rc;
-
- for (rc = 0; --len >= 0;) {
- rc *= 10;
- rc += *begin++ - '0';
- }
- return rc;
-}
-
-int
-cd9660_tstamp_conv17(u_char *pi, struct timespec *pu)
-{
- u_char buf[7];
-
- /* year:"0001"-"9999" -> -1900 */
- buf[0] = cd9660_chars2ui(pi,4) - 1900;
-
- /* month: " 1"-"12" -> 1 - 12 */
- buf[1] = cd9660_chars2ui(pi + 4,2);
-
- /* day: " 1"-"31" -> 1 - 31 */
- buf[2] = cd9660_chars2ui(pi + 6,2);
-
- /* hour: " 0"-"23" -> 0 - 23 */
- buf[3] = cd9660_chars2ui(pi + 8,2);
-
- /* minute:" 0"-"59" -> 0 - 59 */
- buf[4] = cd9660_chars2ui(pi + 10,2);
-
- /* second:" 0"-"59" -> 0 - 59 */
- buf[5] = cd9660_chars2ui(pi + 12,2);
-
- /* difference of GMT */
- buf[6] = pi[16];
-
- return cd9660_tstamp_conv7(buf,pu);
-}
-
-ino_t
-isodirino(struct iso_directory_record *isodir, struct iso_mnt *imp)
-{
- ino_t ino;
-
- ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
- << imp->im_bshift;
- return (ino);
-}
projects / apple / xnu.git / blobdiff