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).
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11 * modification, are permitted provided that the following conditions
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19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
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38 * @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_node.c,v 1.29.2.1 2000/07/08 14:35:56 bp Exp $
40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_node.c,v 1.7 2003/08/20 09:56:32 rob Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/mount.h>
48 #include <sys/vnode.h>
49 #include <sys/malloc.h>
53 #include "cd9660_node.h"
54 #include "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 #ifndef NULL_SIMPLELOCKS
63 static struct lwkt_token cd9660_ihash_token;
66 static void cd9660_ihashrem (struct iso_node *);
67 static unsigned cd9660_chars2ui (unsigned char *begin, int len);
70 * Initialize hash links for inodes and dnodes.
77 isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash);
78 lwkt_inittoken(&cd9660_ihash_token);
87 if (isohashtbl != NULL)
88 free(isohashtbl, M_ISOFSMNT);
94 * Use the device/inum pair to find the incore inode, and return a pointer
95 * to it. If it is in core, but locked, wait for it.
98 cd9660_ihashget(dev, inum)
102 struct thread *td = curthread; /* XXX */
107 lwkt_gettoken(&cd9660_ihash_token);
108 for (ip = isohashtbl[INOHASH(dev, inum)]; ip; ip = ip->i_next) {
109 if (inum == ip->i_number && dev == ip->i_dev) {
111 lwkt_gettoken(&vp->v_interlock); /* YYY */
112 lwkt_reltoken(&cd9660_ihash_token);
113 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td))
118 lwkt_reltoken(&cd9660_ihash_token);
123 * Insert the inode into the hash table, and return it locked.
126 cd9660_ihashins(struct iso_node *ip)
128 struct thread *td = curthread; /* XXX */
129 struct iso_node **ipp, *iq;
131 lwkt_gettoken(&cd9660_ihash_token);
132 ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)];
133 if ((iq = *ipp) != NULL)
134 iq->i_prev = &ip->i_next;
138 lwkt_reltoken(&cd9660_ihash_token);
140 lockmgr(&ip->i_lock, LK_EXCLUSIVE, NULL, td);
144 * Remove the inode from the hash table.
152 lwkt_gettoken(&cd9660_ihash_token);
153 if ((iq = ip->i_next) != NULL)
154 iq->i_prev = ip->i_prev;
160 lwkt_reltoken(&cd9660_ihash_token);
164 * Last reference to an inode, write the inode out and if necessary,
165 * truncate and deallocate the file.
169 struct vop_inactive_args /* {
174 struct vnode *vp = ap->a_vp;
175 struct thread *td = ap->a_td;
176 struct iso_node *ip = VTOI(vp);
179 if (prtactive && vp->v_usecount != 0)
180 vprint("cd9660_inactive: pushing active", vp);
183 VOP_UNLOCK(vp, 0, td);
185 * If we are done with the inode, reclaim it
186 * so that it can be reused immediately.
188 if (ip->inode.iso_mode == 0)
189 vrecycle(vp, NULL, td);
194 * Reclaim an inode so that it can be used for other purposes.
198 struct vop_reclaim_args /* {
203 struct vnode *vp = ap->a_vp;
204 struct iso_node *ip = VTOI(vp);
206 if (prtactive && vp->v_usecount != 0)
207 vprint("cd9660_reclaim: pushing active", vp);
209 * Remove the inode from its hash chain.
213 * Purge old data structures associated with the inode.
220 FREE(vp->v_data, M_ISOFSNODE);
229 cd9660_defattr(isodir, inop, bp, ftype)
230 struct iso_directory_record *isodir;
231 struct iso_node *inop;
233 enum ISO_FTYPE ftype;
235 struct buf *bp2 = NULL;
237 struct iso_extended_attributes *ap = NULL;
240 /* high sierra does not have timezone data, flag is one byte ahead */
241 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
242 &isodir->date[6]: isodir->flags)&2) {
243 inop->inode.iso_mode = S_IFDIR;
245 * If we return 2, fts() will assume there are no subdirectories
246 * (just links for the path and .), so instead we return 1.
248 inop->inode.iso_links = 1;
250 inop->inode.iso_mode = S_IFREG;
251 inop->inode.iso_links = 1;
254 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
255 && (off = isonum_711(isodir->ext_attr_length))) {
256 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
261 ap = (struct iso_extended_attributes *)bp->b_data;
263 if (isonum_711(ap->version) == 1) {
264 if (!(ap->perm[0]&0x40))
265 inop->inode.iso_mode |= VEXEC >> 6;
266 if (!(ap->perm[0]&0x10))
267 inop->inode.iso_mode |= VREAD >> 6;
268 if (!(ap->perm[0]&4))
269 inop->inode.iso_mode |= VEXEC >> 3;
270 if (!(ap->perm[0]&1))
271 inop->inode.iso_mode |= VREAD >> 3;
272 if (!(ap->perm[1]&0x40))
273 inop->inode.iso_mode |= VEXEC;
274 if (!(ap->perm[1]&0x10))
275 inop->inode.iso_mode |= VREAD;
276 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
277 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
282 inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
283 inop->inode.iso_uid = (uid_t)0;
284 inop->inode.iso_gid = (gid_t)0;
294 cd9660_deftstamp(isodir,inop,bp,ftype)
295 struct iso_directory_record *isodir;
296 struct iso_node *inop;
298 enum ISO_FTYPE ftype;
300 struct buf *bp2 = NULL;
302 struct iso_extended_attributes *ap = NULL;
306 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
307 && (off = isonum_711(isodir->ext_attr_length))) {
308 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
313 ap = (struct iso_extended_attributes *)bp->b_data;
315 if (ftype != ISO_FTYPE_HIGH_SIERRA
316 && isonum_711(ap->version) == 1) {
317 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
318 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
319 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
320 inop->inode.iso_ctime = inop->inode.iso_atime;
321 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
322 inop->inode.iso_mtime = inop->inode.iso_ctime;
327 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
328 inop->inode.iso_atime = inop->inode.iso_ctime;
329 inop->inode.iso_mtime = inop->inode.iso_ctime;
336 cd9660_tstamp_conv7(pi,pu,ftype)
339 enum ISO_FTYPE ftype;
342 int y, m, d, hour, minute, second, tz;
350 if(ftype != ISO_FTYPE_HIGH_SIERRA)
353 /* original high sierra misses timezone data */
362 /* computes day number relative to Sept. 19th,1989 */
363 /* don't even *THINK* about changing formula. It works! */
364 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
367 * Changed :-) to make it relative to Jan. 1st, 1970
368 * and to disambiguate negative division
370 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
372 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
374 /* timezone offset is unreliable on some disks */
375 if (-48 <= tz && tz <= 52)
376 crtime -= tz * 15 * 60;
384 cd9660_chars2ui(begin,len)
390 for (rc = 0; --len >= 0;) {
392 rc += *begin++ - '0';
398 cd9660_tstamp_conv17(pi,pu)
404 /* year:"0001"-"9999" -> -1900 */
405 buf[0] = cd9660_chars2ui(pi,4) - 1900;
407 /* month: " 1"-"12" -> 1 - 12 */
408 buf[1] = cd9660_chars2ui(pi + 4,2);
410 /* day: " 1"-"31" -> 1 - 31 */
411 buf[2] = cd9660_chars2ui(pi + 6,2);
413 /* hour: " 0"-"23" -> 0 - 23 */
414 buf[3] = cd9660_chars2ui(pi + 8,2);
416 /* minute:" 0"-"59" -> 0 - 59 */
417 buf[4] = cd9660_chars2ui(pi + 10,2);
419 /* second:" 0"-"59" -> 0 - 59 */
420 buf[5] = cd9660_chars2ui(pi + 12,2);
422 /* difference of GMT */
425 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
429 isodirino(isodir, imp)
430 struct iso_directory_record *isodir;
435 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))