2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1994, 1995
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley
8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
9 * Support code is derived from software contributed to Berkeley
10 * by Atsushi Murai (amurai@spec.co.jp).
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/mount.h>
47 #include <sys/vnode.h>
48 #include <sys/malloc.h>
50 #include <sys/mutex.h>
52 #include <fs/cd9660/iso.h>
53 #include <fs/cd9660/cd9660_node.h>
54 #include <fs/cd9660/cd9660_mount.h>
56 static unsigned cd9660_chars2ui(unsigned char *begin, int len);
59 * Last reference to an inode, write the inode out and if necessary,
60 * truncate and deallocate the file.
63 cd9660_inactive(struct vop_inactive_args *ap)
65 struct vnode *vp = ap->a_vp;
66 struct iso_node *ip = VTOI(vp);
70 * If we are done with the inode, reclaim it
71 * so that it can be reused immediately.
73 if (ip->inode.iso_mode == 0)
79 * Reclaim an inode so that it can be used for other purposes.
82 cd9660_reclaim(struct vop_reclaim_args *ap)
84 struct vnode *vp = ap->a_vp;
87 * Remove the inode from its hash chain.
92 * Purge old data structures associated with the inode.
94 free(vp->v_data, M_ISOFSNODE);
103 cd9660_defattr(struct iso_directory_record *isodir, struct iso_node *inop,
104 struct buf *bp, enum ISO_FTYPE ftype)
106 struct buf *bp2 = NULL;
108 struct iso_extended_attributes *ap = NULL;
111 /* high sierra does not have timezone data, flag is one byte ahead */
112 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
113 &isodir->date[6]: isodir->flags)&2) {
114 inop->inode.iso_mode = S_IFDIR;
116 * If we return 2, fts() will assume there are no subdirectories
117 * (just links for the path and .), so instead we return 1.
119 inop->inode.iso_links = 1;
121 inop->inode.iso_mode = S_IFREG;
122 inop->inode.iso_links = 1;
125 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
126 && (off = isonum_711(isodir->ext_attr_length))) {
127 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
132 ap = (struct iso_extended_attributes *)bp->b_data;
134 if (isonum_711(ap->version) == 1) {
135 if (!(ap->perm[0]&0x40))
136 inop->inode.iso_mode |= S_IXOTH;
137 if (!(ap->perm[0]&0x10))
138 inop->inode.iso_mode |= S_IROTH;
139 if (!(ap->perm[0]&4))
140 inop->inode.iso_mode |= S_IXGRP;
141 if (!(ap->perm[0]&1))
142 inop->inode.iso_mode |= S_IRGRP;
143 if (!(ap->perm[1]&0x40))
144 inop->inode.iso_mode |= S_IXUSR;
145 if (!(ap->perm[1]&0x10))
146 inop->inode.iso_mode |= S_IRUSR;
147 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
148 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
153 inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
154 inop->inode.iso_uid = (uid_t)0;
155 inop->inode.iso_gid = (gid_t)0;
165 cd9660_deftstamp(struct iso_directory_record *isodir, struct iso_node *inop,
166 struct buf *bp, enum ISO_FTYPE ftype)
168 struct buf *bp2 = NULL;
170 struct iso_extended_attributes *ap = NULL;
174 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
175 && (off = isonum_711(isodir->ext_attr_length))) {
176 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
181 ap = (struct iso_extended_attributes *)bp->b_data;
183 if (ftype != ISO_FTYPE_HIGH_SIERRA
184 && isonum_711(ap->version) == 1) {
185 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
186 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
187 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
188 inop->inode.iso_ctime = inop->inode.iso_atime;
189 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
190 inop->inode.iso_mtime = inop->inode.iso_ctime;
195 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
196 inop->inode.iso_atime = inop->inode.iso_ctime;
197 inop->inode.iso_mtime = inop->inode.iso_ctime;
204 cd9660_tstamp_conv7(u_char *pi, struct timespec *pu, enum ISO_FTYPE ftype)
207 int y, m, d, hour, minute, second, tz;
215 if(ftype != ISO_FTYPE_HIGH_SIERRA)
216 tz = ((signed char *)pi)[6]; /* Timezone value is signed. */
218 /* original high sierra misses timezone data */
227 /* computes day number relative to Sept. 19th,1989 */
228 /* don't even *THINK* about changing formula. It works! */
229 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
232 * Changed :-) to make it relative to Jan. 1st, 1970
233 * and to disambiguate negative division
235 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
237 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
239 /* timezone offset is unreliable on some disks */
240 if (-48 <= tz && tz <= 52)
241 crtime -= tz * 15 * 60;
249 cd9660_chars2ui(u_char *begin, int len)
253 for (rc = 0; --len >= 0;) {
255 rc += *begin++ - '0';
261 cd9660_tstamp_conv17(u_char *pi, struct timespec *pu)
265 /* year:"0001"-"9999" -> -1900 */
266 buf[0] = cd9660_chars2ui(pi,4) - 1900;
268 /* month: " 1"-"12" -> 1 - 12 */
269 buf[1] = cd9660_chars2ui(pi + 4,2);
271 /* day: " 1"-"31" -> 1 - 31 */
272 buf[2] = cd9660_chars2ui(pi + 6,2);
274 /* hour: " 0"-"23" -> 0 - 23 */
275 buf[3] = cd9660_chars2ui(pi + 8,2);
277 /* minute:" 0"-"59" -> 0 - 59 */
278 buf[4] = cd9660_chars2ui(pi + 10,2);
280 /* second:" 0"-"59" -> 0 - 59 */
281 buf[5] = cd9660_chars2ui(pi + 12,2);
283 /* difference of GMT */
286 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
290 isodirino(struct iso_directory_record *isodir, struct iso_mnt *imp)
295 * Note there is an inverse calculation in
296 * cd9660_vfsops.c:cd9660_vget_internal():
297 * ip->iso_start = ino >> imp->im_bshift;
298 * and also a calculation of the isodir pointer
299 * from an inode in cd9660_vnops.c:cd9660_readlink()
301 ino = ((cd_ino_t)isonum_733(isodir->extent) +
302 isonum_711(isodir->ext_attr_length)) << imp->im_bshift;