/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1982, 1986, 1989, 1994, 1995
* 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. 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 8.2 (Berkeley) 1/23/94
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <sys/mutex.h>
#include <fs/cd9660/iso.h>
#include <fs/cd9660/cd9660_node.h>
#include <fs/cd9660/cd9660_mount.h>
static unsigned cd9660_chars2ui(unsigned char *begin, int len);
/*
* Last reference to an inode, write the inode out and if necessary,
* truncate and deallocate the file.
*/
int
cd9660_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct iso_node *ip = VTOI(vp);
int error = 0;
/*
* If we are done with the inode, reclaim it
* so that it can be reused immediately.
*/
if (ip->inode.iso_mode == 0)
vrecycle(vp);
return error;
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
cd9660_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
/*
* Remove the inode from its hash chain.
*/
vfs_hash_remove(vp);
/*
* Purge old data structures associated with the inode.
*/
free(vp->v_data, M_ISOFSNODE);
vp->v_data = NULL;
return (0);
}
/*
* File attributes
*/
void
cd9660_defattr(isodir, inop, bp, ftype)
struct iso_directory_record *isodir;
struct iso_node *inop;
struct buf *bp;
enum ISO_FTYPE ftype;
{
struct buf *bp2 = NULL;
struct iso_mnt *imp;
struct iso_extended_attributes *ap = NULL;
int off;
/* high sierra does not have timezone data, flag is one byte ahead */
if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
&isodir->date[6]: isodir->flags)&2) {
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 *)bp->b_data;
if (isonum_711(ap->version) == 1) {
if (!(ap->perm[0]&0x40))
inop->inode.iso_mode |= S_IXOTH;
if (!(ap->perm[0]&0x10))
inop->inode.iso_mode |= S_IROTH;
if (!(ap->perm[0]&4))
inop->inode.iso_mode |= S_IXGRP;
if (!(ap->perm[0]&1))
inop->inode.iso_mode |= S_IRGRP;
if (!(ap->perm[1]&0x40))
inop->inode.iso_mode |= S_IXUSR;
if (!(ap->perm[1]&0x10))
inop->inode.iso_mode |= S_IRUSR;
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 |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
inop->inode.iso_uid = (uid_t)0;
inop->inode.iso_gid = (gid_t)0;
}
if (bp2)
brelse(bp2);
}
/*
* Time stamps
*/
void
cd9660_deftstamp(isodir,inop,bp,ftype)
struct iso_directory_record *isodir;
struct iso_node *inop;
struct buf *bp;
enum ISO_FTYPE ftype;
{
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 *)bp->b_data;
if (ftype != ISO_FTYPE_HIGH_SIERRA
&& 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,ftype);
inop->inode.iso_atime = inop->inode.iso_ctime;
inop->inode.iso_mtime = inop->inode.iso_ctime;
}
if (bp2)
brelse(bp2);
}
int
cd9660_tstamp_conv7(pi,pu,ftype)
u_char *pi;
struct timespec *pu;
enum ISO_FTYPE ftype;
{
int crtime, days;
int y, m, d, hour, minute, second, tz;
y = pi[0] + 1900;
m = pi[1];
d = pi[2];
hour = pi[3];
minute = pi[4];
second = pi[5];
if(ftype != ISO_FTYPE_HIGH_SIERRA)
tz = ((signed char *)pi)[6]; /* Timezone value is signed. */
else
/* original high sierra misses timezone data */
tz = 0;
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 <= tz && tz <= 52)
crtime -= tz * 15 * 60;
}
pu->tv_sec = crtime;
pu->tv_nsec = 0;
return 1;
}
static u_int
cd9660_chars2ui(begin,len)
u_char *begin;
int len;
{
u_int rc;
for (rc = 0; --len >= 0;) {
rc *= 10;
rc += *begin++ - '0';
}
return rc;
}
int
cd9660_tstamp_conv17(pi,pu)
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, ISO_FTYPE_DEFAULT);
}
cd_ino_t
isodirino(isodir, imp)
struct iso_directory_record *isodir;
struct iso_mnt *imp;
{
cd_ino_t ino;
/*
* Note there is an inverse calculation in
* cd9660_vfsops.c:cd9660_vget_internal():
* ip->iso_start = ino >> imp->im_bshift;
* and also a calculation of the isodir pointer
* from an inode in cd9660_vnops.c:cd9660_readlink()
*/
ino = ((cd_ino_t)isonum_733(isodir->extent) +
isonum_711(isodir->ext_attr_length)) << imp->im_bshift;
return ino;
}