1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1994, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/mount.h>
43 #include <sys/bio.h>
44 #include <sys/buf.h>
45 #include <sys/vnode.h>
46 #include <sys/malloc.h>
47 #include <sys/stat.h>
48 #include <sys/mutex.h>
49
50 #include <fs/cd9660/iso.h>
51 #include <fs/cd9660/cd9660_node.h>
52 #include <fs/cd9660/cd9660_mount.h>
53
54 static unsigned cd9660_chars2ui(unsigned char *begin, int len);
55
56 /*
57 * Last reference to an inode, write the inode out and if necessary,
58 * truncate and deallocate the file.
59 */
60 int
61 cd9660_inactive(ap)
62 struct vop_inactive_args /* {
63 struct vnode *a_vp;
64 struct thread *a_td;
65 } */ *ap;
66 {
67 struct vnode *vp = ap->a_vp;
68 struct iso_node *ip = VTOI(vp);
69 int error = 0;
70
71 /*
72 * If we are done with the inode, reclaim it
73 * so that it can be reused immediately.
74 */
75 if (ip->inode.iso_mode == 0)
76 vrecycle(vp);
77 return error;
78 }
79
80 /*
81 * Reclaim an inode so that it can be used for other purposes.
82 */
83 int
84 cd9660_reclaim(ap)
85 struct vop_reclaim_args /* {
86 struct vnode *a_vp;
87 struct thread *a_td;
88 } */ *ap;
89 {
90 struct vnode *vp = ap->a_vp;
91
92 /*
93 * Destroy the vm object and flush associated pages.
94 */
95 vnode_destroy_vobject(vp);
96 /*
97 * Remove the inode from its hash chain.
98 */
99 vfs_hash_remove(vp);
100
101 /*
102 * Purge old data structures associated with the inode.
103 */
104 free(vp->v_data, M_ISOFSNODE);
105 vp->v_data = NULL;
106 return (0);
107 }
108
109 /*
110 * File attributes
111 */
112 void
113 cd9660_defattr(isodir, inop, bp, ftype)
114 struct iso_directory_record *isodir;
115 struct iso_node *inop;
116 struct buf *bp;
117 enum ISO_FTYPE ftype;
118 {
119 struct buf *bp2 = NULL;
120 struct iso_mnt *imp;
121 struct iso_extended_attributes *ap = NULL;
122 int off;
123
124 /* high sierra does not have timezone data, flag is one byte ahead */
125 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
126 &isodir->date[6]: isodir->flags)&2) {
127 inop->inode.iso_mode = S_IFDIR;
128 /*
129 * If we return 2, fts() will assume there are no subdirectories
130 * (just links for the path and .), so instead we return 1.
131 */
132 inop->inode.iso_links = 1;
133 } else {
134 inop->inode.iso_mode = S_IFREG;
135 inop->inode.iso_links = 1;
136 }
137 if (!bp
138 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
139 && (off = isonum_711(isodir->ext_attr_length))) {
140 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
141 &bp2);
142 bp = bp2;
143 }
144 if (bp) {
145 ap = (struct iso_extended_attributes *)bp->b_data;
146
147 if (isonum_711(ap->version) == 1) {
148 if (!(ap->perm[0]&0x40))
149 inop->inode.iso_mode |= S_IXOTH;
150 if (!(ap->perm[0]&0x10))
151 inop->inode.iso_mode |= S_IROTH;
152 if (!(ap->perm[0]&4))
153 inop->inode.iso_mode |= S_IXGRP;
154 if (!(ap->perm[0]&1))
155 inop->inode.iso_mode |= S_IRGRP;
156 if (!(ap->perm[1]&0x40))
157 inop->inode.iso_mode |= S_IXUSR;
158 if (!(ap->perm[1]&0x10))
159 inop->inode.iso_mode |= S_IRUSR;
160 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
161 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
162 } else
163 ap = NULL;
164 }
165 if (!ap) {
166 inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
167 inop->inode.iso_uid = (uid_t)0;
168 inop->inode.iso_gid = (gid_t)0;
169 }
170 if (bp2)
171 brelse(bp2);
172 }
173
174 /*
175 * Time stamps
176 */
177 void
178 cd9660_deftstamp(isodir,inop,bp,ftype)
179 struct iso_directory_record *isodir;
180 struct iso_node *inop;
181 struct buf *bp;
182 enum ISO_FTYPE ftype;
183 {
184 struct buf *bp2 = NULL;
185 struct iso_mnt *imp;
186 struct iso_extended_attributes *ap = NULL;
187 int off;
188
189 if (!bp
190 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
191 && (off = isonum_711(isodir->ext_attr_length))) {
192 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
193 &bp2);
194 bp = bp2;
195 }
196 if (bp) {
197 ap = (struct iso_extended_attributes *)bp->b_data;
198
199 if (ftype != ISO_FTYPE_HIGH_SIERRA
200 && isonum_711(ap->version) == 1) {
201 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
202 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
203 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
204 inop->inode.iso_ctime = inop->inode.iso_atime;
205 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
206 inop->inode.iso_mtime = inop->inode.iso_ctime;
207 } else
208 ap = NULL;
209 }
210 if (!ap) {
211 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
212 inop->inode.iso_atime = inop->inode.iso_ctime;
213 inop->inode.iso_mtime = inop->inode.iso_ctime;
214 }
215 if (bp2)
216 brelse(bp2);
217 }
218
219 int
220 cd9660_tstamp_conv7(pi,pu,ftype)
221 u_char *pi;
222 struct timespec *pu;
223 enum ISO_FTYPE ftype;
224 {
225 int crtime, days;
226 int y, m, d, hour, minute, second, tz;
227
228 y = pi[0] + 1900;
229 m = pi[1];
230 d = pi[2];
231 hour = pi[3];
232 minute = pi[4];
233 second = pi[5];
234 if(ftype != ISO_FTYPE_HIGH_SIERRA)
235 tz = ((signed char *)pi)[6]; /* Timezone value is signed. */
236 else
237 /* original high sierra misses timezone data */
238 tz = 0;
239
240 if (y < 1970) {
241 pu->tv_sec = 0;
242 pu->tv_nsec = 0;
243 return 0;
244 } else {
245 #ifdef ORIGINAL
246 /* computes day number relative to Sept. 19th,1989 */
247 /* don't even *THINK* about changing formula. It works! */
248 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
249 #else
250 /*
251 * Changed :-) to make it relative to Jan. 1st, 1970
252 * and to disambiguate negative division
253 */
254 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
255 #endif
256 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
257
258 /* timezone offset is unreliable on some disks */
259 if (-48 <= tz && tz <= 52)
260 crtime -= tz * 15 * 60;
261 }
262 pu->tv_sec = crtime;
263 pu->tv_nsec = 0;
264 return 1;
265 }
266
267 static u_int
268 cd9660_chars2ui(begin,len)
269 u_char *begin;
270 int len;
271 {
272 u_int rc;
273
274 for (rc = 0; --len >= 0;) {
275 rc *= 10;
276 rc += *begin++ - '';
277 }
278 return rc;
279 }
280
281 int
282 cd9660_tstamp_conv17(pi,pu)
283 u_char *pi;
284 struct timespec *pu;
285 {
286 u_char buf[7];
287
288 /* year:"0001"-"9999" -> -1900 */
289 buf[0] = cd9660_chars2ui(pi,4) - 1900;
290
291 /* month: " 1"-"12" -> 1 - 12 */
292 buf[1] = cd9660_chars2ui(pi + 4,2);
293
294 /* day: " 1"-"31" -> 1 - 31 */
295 buf[2] = cd9660_chars2ui(pi + 6,2);
296
297 /* hour: " 0"-"23" -> 0 - 23 */
298 buf[3] = cd9660_chars2ui(pi + 8,2);
299
300 /* minute:" 0"-"59" -> 0 - 59 */
301 buf[4] = cd9660_chars2ui(pi + 10,2);
302
303 /* second:" 0"-"59" -> 0 - 59 */
304 buf[5] = cd9660_chars2ui(pi + 12,2);
305
306 /* difference of GMT */
307 buf[6] = pi[16];
308
309 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
310 }
311
312 ino_t
313 isodirino(isodir, imp)
314 struct iso_directory_record *isodir;
315 struct iso_mnt *imp;
316 {
317 ino_t ino;
318
319 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
320 << imp->im_bshift;
321 return (ino);
322 }
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