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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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 1.10 2004/04/12 23:18:55 cpressey 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.
73 cd9660_init(struct vfsconf *vfsp)
76 isohashtbl = hashinit(desiredvnodes, M_ISOFSMNT, &isohash);
77 lwkt_token_init(&cd9660_ihash_token);
82 cd9660_uninit(struct vfsconf *vfsp)
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_t dev, ino_t inum)
98 struct thread *td = curthread; /* XXX */
104 lwkt_gettoken(&ilock, &cd9660_ihash_token);
106 for (ip = isohashtbl[INOHASH(dev, inum)]; ip; ip = ip->i_next) {
107 if (inum != ip->i_number || dev != ip->i_dev)
110 lwkt_gettoken(&vlock, vp->v_interlock);
112 * We must check to see if the inode has been ripped
113 * out from under us after blocking.
115 for (ip = isohashtbl[INOHASH(dev, inum)]; ip; ip = ip->i_next) {
116 if (inum == ip->i_number && dev == ip->i_dev)
119 if (ip == NULL || ITOV(ip) != vp) {
120 lwkt_reltoken(&vlock);
123 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
125 lwkt_reltoken(&ilock);
128 lwkt_reltoken(&ilock);
133 * Insert the inode into the hash table, and return it locked.
136 cd9660_ihashins(struct iso_node *ip)
138 struct thread *td = curthread; /* XXX */
139 struct iso_node **ipp, *iq;
142 lwkt_gettoken(&ilock, &cd9660_ihash_token);
143 ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)];
144 if ((iq = *ipp) != NULL)
145 iq->i_prev = &ip->i_next;
149 lwkt_reltoken(&ilock);
151 lockmgr(&ip->i_lock, LK_EXCLUSIVE, NULL, td);
155 * Remove the inode from the hash table.
158 cd9660_ihashrem(struct iso_node *ip)
163 lwkt_gettoken(&ilock, &cd9660_ihash_token);
164 if ((iq = ip->i_next) != NULL)
165 iq->i_prev = ip->i_prev;
171 lwkt_reltoken(&ilock);
175 * Last reference to an inode, write the inode out and if necessary,
176 * truncate and deallocate the file.
178 * cd9660_inactive(struct vnode *a_vp, struct thread *a_td)
181 cd9660_inactive(struct vop_inactive_args *ap)
183 struct vnode *vp = ap->a_vp;
184 struct thread *td = ap->a_td;
185 struct iso_node *ip = VTOI(vp);
188 if (prtactive && vp->v_usecount != 0)
189 vprint("cd9660_inactive: pushing active", vp);
192 VOP_UNLOCK(vp, NULL, 0, td);
194 * If we are done with the inode, reclaim it
195 * so that it can be reused immediately.
197 if (ip->inode.iso_mode == 0)
198 vrecycle(vp, NULL, td);
203 * Reclaim an inode so that it can be used for other purposes.
205 * cd9660_reclaim(struct vnode *a_vp, struct proc *a_p)
208 cd9660_reclaim(struct vop_reclaim_args *ap)
210 struct vnode *vp = ap->a_vp;
211 struct iso_node *ip = VTOI(vp);
213 if (prtactive && vp->v_usecount != 0)
214 vprint("cd9660_reclaim: pushing active", vp);
216 * Remove the inode from its hash chain.
220 * Purge old data structures associated with the inode.
227 FREE(vp->v_data, M_ISOFSNODE);
236 cd9660_defattr(struct iso_directory_record *isodir, struct iso_node *inop,
237 struct buf *bp, enum ISO_FTYPE ftype)
239 struct buf *bp2 = NULL;
241 struct iso_extended_attributes *ap = NULL;
244 /* high sierra does not have timezone data, flag is one byte ahead */
245 if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
246 &isodir->date[6]: isodir->flags)&2) {
247 inop->inode.iso_mode = S_IFDIR;
249 * If we return 2, fts() will assume there are no subdirectories
250 * (just links for the path and .), so instead we return 1.
252 inop->inode.iso_links = 1;
254 inop->inode.iso_mode = S_IFREG;
255 inop->inode.iso_links = 1;
258 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
259 && (off = isonum_711(isodir->ext_attr_length))) {
260 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
265 ap = (struct iso_extended_attributes *)bp->b_data;
267 if (isonum_711(ap->version) == 1) {
268 if (!(ap->perm[0]&0x40))
269 inop->inode.iso_mode |= VEXEC >> 6;
270 if (!(ap->perm[0]&0x10))
271 inop->inode.iso_mode |= VREAD >> 6;
272 if (!(ap->perm[0]&4))
273 inop->inode.iso_mode |= VEXEC >> 3;
274 if (!(ap->perm[0]&1))
275 inop->inode.iso_mode |= VREAD >> 3;
276 if (!(ap->perm[1]&0x40))
277 inop->inode.iso_mode |= VEXEC;
278 if (!(ap->perm[1]&0x10))
279 inop->inode.iso_mode |= VREAD;
280 inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
281 inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
286 inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
287 inop->inode.iso_uid = (uid_t)0;
288 inop->inode.iso_gid = (gid_t)0;
298 cd9660_deftstamp(struct iso_directory_record *isodir, struct iso_node *inop,
299 struct buf *bp, enum ISO_FTYPE ftype)
301 struct buf *bp2 = NULL;
303 struct iso_extended_attributes *ap = NULL;
307 && ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
308 && (off = isonum_711(isodir->ext_attr_length))) {
309 cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
314 ap = (struct iso_extended_attributes *)bp->b_data;
316 if (ftype != ISO_FTYPE_HIGH_SIERRA
317 && isonum_711(ap->version) == 1) {
318 if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
319 cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
320 if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
321 inop->inode.iso_ctime = inop->inode.iso_atime;
322 if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
323 inop->inode.iso_mtime = inop->inode.iso_ctime;
328 cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
329 inop->inode.iso_atime = inop->inode.iso_ctime;
330 inop->inode.iso_mtime = inop->inode.iso_ctime;
337 cd9660_tstamp_conv7(u_char *pi, struct timespec *pu, enum ISO_FTYPE ftype)
340 int y, m, d, hour, minute, second, tz;
348 if(ftype != ISO_FTYPE_HIGH_SIERRA)
351 /* original high sierra misses timezone data */
360 /* computes day number relative to Sept. 19th,1989 */
361 /* don't even *THINK* about changing formula. It works! */
362 days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
365 * Changed :-) to make it relative to Jan. 1st, 1970
366 * and to disambiguate negative division
368 days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
370 crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
372 /* timezone offset is unreliable on some disks */
373 if (-48 <= tz && tz <= 52)
374 crtime -= tz * 15 * 60;
382 cd9660_chars2ui(u_char *begin, int len)
386 for (rc = 0; --len >= 0;) {
388 rc += *begin++ - '0';
394 cd9660_tstamp_conv17(u_char *pi, struct timespec *pu)
398 /* year:"0001"-"9999" -> -1900 */
399 buf[0] = cd9660_chars2ui(pi,4) - 1900;
401 /* month: " 1"-"12" -> 1 - 12 */
402 buf[1] = cd9660_chars2ui(pi + 4,2);
404 /* day: " 1"-"31" -> 1 - 31 */
405 buf[2] = cd9660_chars2ui(pi + 6,2);
407 /* hour: " 0"-"23" -> 0 - 23 */
408 buf[3] = cd9660_chars2ui(pi + 8,2);
410 /* minute:" 0"-"59" -> 0 - 59 */
411 buf[4] = cd9660_chars2ui(pi + 10,2);
413 /* second:" 0"-"59" -> 0 - 59 */
414 buf[5] = cd9660_chars2ui(pi + 12,2);
416 /* difference of GMT */
419 return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
423 isodirino(struct iso_directory_record *isodir, struct iso_mnt *imp)
427 ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))