2 * Copyright (c) 1982, 1986, 1989, 1994, 1995
3 * The Regents of the University of California. All rights reserved.
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).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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38 * @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
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 <isofs/cd9660/iso.h>
53 #include <isofs/cd9660/cd9660_node.h>
54 #include <isofs/cd9660/cd9660_mount.h>
57 * Structures associated with iso_node caching.
59 static struct iso_node **isohashtbl;
60 static u_long isohash;
61 #define INOHASH(device, inum) ((minor(device) + ((inum)>>12)) & isohash)
62 static struct mtx cd9660_ihash_mtx;
64 static void cd9660_ihashrem(struct iso_node *);
65 static unsigned cd9660_chars2ui(unsigned char *begin, int len);
68 * Initialize hash links for inodes and dnodes.
75 isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash);
76 mtx_init(&cd9660_ihash_mtx, "cd9660_ihash", NULL, MTX_DEF);
85 if (isohashtbl != NULL)
86 free(isohashtbl, M_ISOFSMNT);
92 * Use the device/inum pair to find the incore inode, and return a pointer
93 * to it. If it is in core, but locked, wait for it.
96 cd9660_ihashget(dev, inum, flags, vpp)
102 struct thread *td = curthread; /* XXX */
109 mtx_lock(&cd9660_ihash_mtx);
110 for (ip = isohashtbl[INOHASH(dev, inum)]; ip; ip = ip->i_next) {
111 if (inum == ip->i_number && dev == ip->i_dev) {
113 mtx_lock(&vp->v_interlock);
114 mtx_unlock(&cd9660_ihash_mtx);
115 error = vget(vp, flags | LK_INTERLOCK, td);
124 mtx_unlock(&cd9660_ihash_mtx);
129 * Insert the inode into the hash table, and return it locked.
135 struct iso_node **ipp, *iq;
137 mtx_lock(&cd9660_ihash_mtx);
138 ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)];
139 if ((iq = *ipp) != NULL)
140 iq->i_prev = &ip->i_next;
144 mtx_unlock(&cd9660_ihash_mtx);
146 vn_lock(ITOV(ip), LK_EXCLUSIVE | LK_RETRY, curthread);
150 * Remove the inode from the hash table.
154 register struct iso_node *ip;
156 register struct iso_node *iq;
158 mtx_lock(&cd9660_ihash_mtx);
159 if ((iq = ip->i_next) != NULL)
160 iq->i_prev = ip->i_prev;
166 mtx_unlock(&cd9660_ihash_mtx);
170 * Last reference to an inode, write the inode out and if necessary,
171 * truncate and deallocate the file.
175 struct vop_inactive_args /* {
180 struct vnode *vp = ap->a_vp;
181 struct thread *td = ap->a_td;
182 register struct iso_node *ip = VTOI(vp);
185 if (prtactive && vrefcnt(vp) != 0)
186 vprint("cd9660_inactive: pushing active", vp);
189 VOP_UNLOCK(vp, 0, td);
191 * If we are done with the inode, reclaim it
192 * so that it can be reused immediately.
194 if (ip->inode.iso_mode == 0)
195 vrecycle(vp, NULL, td);
200 * Reclaim an inode so that it can be used for other purposes.
204 struct vop_reclaim_args /* {
209 register struct vnode *vp = ap->a_vp;
210 register struct iso_node *ip = VTOI(vp);
212 if (prtactive && vrefcnt(vp) != 0)
213 vprint("cd9660_reclaim: pushing active", vp);
215 * Remove the inode from its hash chain.
219 * Purge old data structures associated with the inode.
226 FREE(vp->v_data, M_ISOFSNODE);
235 cd9660_defattr(isodir, inop, bp, ftype)
236 struct iso_directory_record *isodir;
237 struct iso_node *inop;
239 enum ISO_FTYPE ftype;
241 struct buf *bp2 = NULL;
243 struct iso_extended_attributes *ap = NULL;
246 /* high sierra does not have timezone data, flag is one byte ahead */
247 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
248 &isodir->date[6]: isodir->flags)&2) {
249 inop->inode.iso_mode = S_IFDIR;
251 * If we return 2, fts() will assume there are no subdirectories
252 * (just links for the path and .), so instead we return 1.
254 inop->inode.iso_links = 1;
256 inop->inode.iso_mode = S_IFREG;
257 inop->inode.iso_links = 1;
260 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
261 && (off = isonum_711(isodir->ext_attr_length))) {
262 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
267 ap = (struct iso_extended_attributes *)bp->b_data;
269 if (isonum_711(ap->version) == 1) {
270 if (!(ap->perm[0]&0x40))
271 inop->inode.iso_mode |= VEXEC >> 6;
272 if (!(ap->perm[0]&0x10))
273 inop->inode.iso_mode |= VREAD >> 6;
274 if (!(ap->perm[0]&4))
275 inop->inode.iso_mode |= VEXEC >> 3;
276 if (!(ap->perm[0]&1))
277 inop->inode.iso_mode |= VREAD >> 3;
278 if (!(ap->perm[1]&0x40))
279 inop->inode.iso_mode |= VEXEC;
280 if (!(ap->perm[1]&0x10))
281 inop->inode.iso_mode |= VREAD;
282 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
283 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
288 inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
289 inop->inode.iso_uid = (uid_t)0;
290 inop->inode.iso_gid = (gid_t)0;
300 cd9660_deftstamp(isodir,inop,bp,ftype)
301 struct iso_directory_record *isodir;
302 struct iso_node *inop;
304 enum ISO_FTYPE ftype;
306 struct buf *bp2 = NULL;
308 struct iso_extended_attributes *ap = NULL;
312 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
313 && (off = isonum_711(isodir->ext_attr_length))) {
314 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
319 ap = (struct iso_extended_attributes *)bp->b_data;
321 if (ftype != ISO_FTYPE_HIGH_SIERRA
322 && isonum_711(ap->version) == 1) {
323 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
324 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
325 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
326 inop->inode.iso_ctime = inop->inode.iso_atime;
327 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
328 inop->inode.iso_mtime = inop->inode.iso_ctime;
333 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
334 inop->inode.iso_atime = inop->inode.iso_ctime;
335 inop->inode.iso_mtime = inop->inode.iso_ctime;
342 cd9660_tstamp_conv7(pi,pu,ftype)
345 enum ISO_FTYPE ftype;
348 int y, m, d, hour, minute, second, tz;
356 if(ftype != ISO_FTYPE_HIGH_SIERRA)
359 /* original high sierra misses timezone data */
368 /* computes day number relative to Sept. 19th,1989 */
369 /* don't even *THINK* about changing formula. It works! */
370 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
373 * Changed :-) to make it relative to Jan. 1st, 1970
374 * and to disambiguate negative division
376 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
378 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
380 /* timezone offset is unreliable on some disks */
381 if (-48 <= tz && tz <= 52)
382 crtime -= tz * 15 * 60;
390 cd9660_chars2ui(begin,len)
396 for (rc = 0; --len >= 0;) {
398 rc += *begin++ - '0';
404 cd9660_tstamp_conv17(pi,pu)
410 /* year:"0001"-"9999" -> -1900 */
411 buf[0] = cd9660_chars2ui(pi,4) - 1900;
413 /* month: " 1"-"12" -> 1 - 12 */
414 buf[1] = cd9660_chars2ui(pi + 4,2);
416 /* day: " 1"-"31" -> 1 - 31 */
417 buf[2] = cd9660_chars2ui(pi + 6,2);
419 /* hour: " 0"-"23" -> 0 - 23 */
420 buf[3] = cd9660_chars2ui(pi + 8,2);
422 /* minute:" 0"-"59" -> 0 - 59 */
423 buf[4] = cd9660_chars2ui(pi + 10,2);
425 /* second:" 0"-"59" -> 0 - 59 */
426 buf[5] = cd9660_chars2ui(pi + 12,2);
428 /* difference of GMT */
431 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
435 isodirino(isodir, imp)
436 struct iso_directory_record *isodir;
441 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))