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
54static 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 */
60int
61cd9660_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 thread *td = ap->a_td;
69	struct iso_node *ip = VTOI(vp);
70	int error = 0;
71
72	/*
73	 * If we are done with the inode, reclaim it
74	 * so that it can be reused immediately.
75	 */
76	if (ip->inode.iso_mode == 0)
77		vrecycle(vp, td);
78	return error;
79}
80
81/*
82 * Reclaim an inode so that it can be used for other purposes.
83 */
84int
85cd9660_reclaim(ap)
86	struct vop_reclaim_args /* {
87		struct vnode *a_vp;
88		struct thread *a_td;
89	} */ *ap;
90{
91	struct vnode *vp = ap->a_vp;
92
93	/*
94	 * Destroy the vm object and flush associated pages.
95	 */
96	vnode_destroy_vobject(vp);
97	/*
98	 * Remove the inode from its hash chain.
99	 */
100	vfs_hash_remove(vp);
101
102	/*
103	 * Purge old data structures associated with the inode.
104	 */
105	free(vp->v_data, M_ISOFSNODE);
106	vp->v_data = NULL;
107	return (0);
108}
109
110/*
111 * File attributes
112 */
113void
114cd9660_defattr(isodir, inop, bp, ftype)
115	struct iso_directory_record *isodir;
116	struct iso_node *inop;
117	struct buf *bp;
118	enum ISO_FTYPE ftype;
119{
120	struct buf *bp2 = NULL;
121	struct iso_mnt *imp;
122	struct iso_extended_attributes *ap = NULL;
123	int off;
124
125	/* high sierra does not have timezone data, flag is one byte ahead */
126	if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
127		       &isodir->date[6]: isodir->flags)&2) {
128		inop->inode.iso_mode = S_IFDIR;
129		/*
130		 * If we return 2, fts() will assume there are no subdirectories
131		 * (just links for the path and .), so instead we return 1.
132		 */
133		inop->inode.iso_links = 1;
134	} else {
135		inop->inode.iso_mode = S_IFREG;
136		inop->inode.iso_links = 1;
137	}
138	if (!bp
139	    && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
140	    && (off = isonum_711(isodir->ext_attr_length))) {
141		cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
142			     &bp2);
143		bp = bp2;
144	}
145	if (bp) {
146		ap = (struct iso_extended_attributes *)bp->b_data;
147
148		if (isonum_711(ap->version) == 1) {
149			if (!(ap->perm[0]&0x40))
150				inop->inode.iso_mode |= S_IXOTH;
151			if (!(ap->perm[0]&0x10))
152				inop->inode.iso_mode |= S_IROTH;
153			if (!(ap->perm[0]&4))
154				inop->inode.iso_mode |= S_IXGRP;
155			if (!(ap->perm[0]&1))
156				inop->inode.iso_mode |= S_IRGRP;
157			if (!(ap->perm[1]&0x40))
158				inop->inode.iso_mode |= S_IXUSR;
159			if (!(ap->perm[1]&0x10))
160				inop->inode.iso_mode |= S_IRUSR;
161			inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
162			inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
163		} else
164			ap = NULL;
165	}
166	if (!ap) {
167		inop->inode.iso_mode |= S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
168		inop->inode.iso_uid = (uid_t)0;
169		inop->inode.iso_gid = (gid_t)0;
170	}
171	if (bp2)
172		brelse(bp2);
173}
174
175/*
176 * Time stamps
177 */
178void
179cd9660_deftstamp(isodir,inop,bp,ftype)
180	struct iso_directory_record *isodir;
181	struct iso_node *inop;
182	struct buf *bp;
183	enum ISO_FTYPE ftype;
184{
185	struct buf *bp2 = NULL;
186	struct iso_mnt *imp;
187	struct iso_extended_attributes *ap = NULL;
188	int off;
189
190	if (!bp
191	    && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
192	    && (off = isonum_711(isodir->ext_attr_length))) {
193		cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
194			     &bp2);
195		bp = bp2;
196	}
197	if (bp) {
198		ap = (struct iso_extended_attributes *)bp->b_data;
199
200		if (ftype != ISO_FTYPE_HIGH_SIERRA
201		    && isonum_711(ap->version) == 1) {
202			if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
203				cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
204			if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
205				inop->inode.iso_ctime = inop->inode.iso_atime;
206			if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
207				inop->inode.iso_mtime = inop->inode.iso_ctime;
208		} else
209			ap = NULL;
210	}
211	if (!ap) {
212		cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
213		inop->inode.iso_atime = inop->inode.iso_ctime;
214		inop->inode.iso_mtime = inop->inode.iso_ctime;
215	}
216	if (bp2)
217		brelse(bp2);
218}
219
220int
221cd9660_tstamp_conv7(pi,pu,ftype)
222	u_char *pi;
223	struct timespec *pu;
224	enum ISO_FTYPE ftype;
225{
226	int crtime, days;
227	int y, m, d, hour, minute, second, tz;
228
229	y = pi[0] + 1900;
230	m = pi[1];
231	d = pi[2];
232	hour = pi[3];
233	minute = pi[4];
234	second = pi[5];
235	if(ftype != ISO_FTYPE_HIGH_SIERRA)
236		tz = ((signed char *)pi)[6]; /* Timezone value is signed. */
237	else
238		/* original high sierra misses timezone data */
239		tz = 0;
240
241	if (y < 1970) {
242		pu->tv_sec  = 0;
243		pu->tv_nsec = 0;
244		return 0;
245	} else {
246#ifdef	ORIGINAL
247		/* computes day number relative to Sept. 19th,1989 */
248		/* don't even *THINK* about changing formula. It works! */
249		days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
250#else
251		/*
252		 * Changed :-) to make it relative to Jan. 1st, 1970
253		 * and to disambiguate negative division
254		 */
255		days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
256#endif
257		crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
258
259		/* timezone offset is unreliable on some disks */
260		if (-48 <= tz && tz <= 52)
261			crtime -= tz * 15 * 60;
262	}
263	pu->tv_sec  = crtime;
264	pu->tv_nsec = 0;
265	return 1;
266}
267
268static u_int
269cd9660_chars2ui(begin,len)
270	u_char *begin;
271	int len;
272{
273	u_int rc;
274
275	for (rc = 0; --len >= 0;) {
276		rc *= 10;
277		rc += *begin++ - '0';
278	}
279	return rc;
280}
281
282int
283cd9660_tstamp_conv17(pi,pu)
284	u_char *pi;
285	struct timespec *pu;
286{
287	u_char buf[7];
288
289	/* year:"0001"-"9999" -> -1900  */
290	buf[0] = cd9660_chars2ui(pi,4) - 1900;
291
292	/* month: " 1"-"12"   -> 1 - 12 */
293	buf[1] = cd9660_chars2ui(pi + 4,2);
294
295	/* day:	  " 1"-"31"   -> 1 - 31 */
296	buf[2] = cd9660_chars2ui(pi + 6,2);
297
298	/* hour:  " 0"-"23"   -> 0 - 23 */
299	buf[3] = cd9660_chars2ui(pi + 8,2);
300
301	/* minute:" 0"-"59"   -> 0 - 59 */
302	buf[4] = cd9660_chars2ui(pi + 10,2);
303
304	/* second:" 0"-"59"   -> 0 - 59 */
305	buf[5] = cd9660_chars2ui(pi + 12,2);
306
307	/* difference of GMT */
308	buf[6] = pi[16];
309
310	return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
311}
312
313ino_t
314isodirino(isodir, imp)
315	struct iso_directory_record *isodir;
316	struct iso_mnt *imp;
317{
318	ino_t ino;
319
320	ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
321	      << imp->im_bshift;
322	return (ino);
323}
324