2 * Copyright (c) 1993, 1994
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
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)cd9660_rrip.c 8.6 (Berkeley) 12/5/94
39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_rrip.c,v 1.17 1999/08/28 00:46:06 peter Exp $
40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_rrip.c,v 1.7 2004/04/12 23:18:55 cpressey Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
46 #include <sys/vnode.h>
47 #include <sys/mount.h>
48 #include <sys/kernel.h>
51 #include "cd9660_node.h"
52 #include "cd9660_rrip.h"
55 typedef int rrt_func_t (void *, ISO_RRIP_ANALYZE *ana);
60 void (*func2) (struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana);
64 static int cd9660_rrip_altname (ISO_RRIP_ALTNAME *p,
65 ISO_RRIP_ANALYZE *ana);
66 static int cd9660_rrip_attr (ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana);
67 static int cd9660_rrip_cont (ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana);
68 static void cd9660_rrip_defattr (struct iso_directory_record *isodir,
69 ISO_RRIP_ANALYZE *ana);
70 static void cd9660_rrip_defname (struct iso_directory_record *isodir,
71 ISO_RRIP_ANALYZE *ana);
72 static void cd9660_rrip_deftstamp (struct iso_directory_record *isodir,
73 ISO_RRIP_ANALYZE *ana);
74 static int cd9660_rrip_device (ISO_RRIP_DEVICE *p,
75 ISO_RRIP_ANALYZE *ana);
76 static int cd9660_rrip_extref (ISO_RRIP_EXTREF *p,
77 ISO_RRIP_ANALYZE *ana);
78 static int cd9660_rrip_idflag (ISO_RRIP_IDFLAG *p,
79 ISO_RRIP_ANALYZE *ana);
80 static int cd9660_rrip_loop (struct iso_directory_record *isodir,
81 ISO_RRIP_ANALYZE *ana,
83 static int cd9660_rrip_pclink (ISO_RRIP_CLINK *p,
84 ISO_RRIP_ANALYZE *ana);
85 static int cd9660_rrip_reldir (ISO_RRIP_RELDIR *p,
86 ISO_RRIP_ANALYZE *ana);
87 static int cd9660_rrip_slink (ISO_RRIP_SLINK *p,
88 ISO_RRIP_ANALYZE *ana);
89 static int cd9660_rrip_stop (ISO_SUSP_HEADER *p,
90 ISO_RRIP_ANALYZE *ana);
91 static int cd9660_rrip_tstamp (ISO_RRIP_TSTAMP *p,
92 ISO_RRIP_ANALYZE *ana);
95 * POSIX file attribute
98 cd9660_rrip_attr(ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana)
100 ana->inop->inode.iso_mode = isonum_733(p->mode);
101 ana->inop->inode.iso_uid = isonum_733(p->uid);
102 ana->inop->inode.iso_gid = isonum_733(p->gid);
103 ana->inop->inode.iso_links = isonum_733(p->links);
104 ana->fields &= ~ISO_SUSP_ATTR;
105 return ISO_SUSP_ATTR;
109 cd9660_rrip_defattr(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
111 /* But this is a required field! */
112 printf("RRIP without PX field?\n");
113 cd9660_defattr(isodir,ana->inop,NULL,ISO_FTYPE_RRIP);
120 cd9660_rrip_slink(ISO_RRIP_SLINK *p, ISO_RRIP_ANALYZE *ana)
122 ISO_RRIP_SLINK_COMPONENT *pcomp;
123 ISO_RRIP_SLINK_COMPONENT *pcompe;
125 char *outbuf, *inbuf;
127 pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
128 pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length));
130 outbuf = ana->outbuf;
134 * Gathering a Symbolic name from each component with path
138 pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
139 + isonum_711(pcomp->clen))) {
142 if (len < ana->maxlen) {
152 switch (*pcomp->cflag) {
154 case ISO_SUSP_CFLAG_CURRENT:
155 /* Inserting Current */
159 case ISO_SUSP_CFLAG_PARENT:
160 /* Inserting Parent */
164 case ISO_SUSP_CFLAG_ROOT:
165 /* Inserting slash for ROOT */
166 /* start over from beginning(?) */
171 case ISO_SUSP_CFLAG_VOLROOT:
172 /* Inserting a mount point i.e. "/cdrom" */
176 inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
177 wlen = strlen(inbuf);
180 case ISO_SUSP_CFLAG_HOST:
181 /* Inserting hostname i.e. "kurt.tools.de" */
183 wlen = strlen(hostname);
186 case ISO_SUSP_CFLAG_CONTINUE:
190 /* Inserting component */
191 wlen = isonum_711(pcomp->clen);
195 printf("RRIP with incorrect flags?");
196 wlen = ana->maxlen + 1;
200 if (len + wlen > ana->maxlen) {
201 /* indicate error to caller */
204 ana->outbuf -= *ana->outlen;
209 bcopy(inbuf,outbuf,wlen);
214 ana->outbuf = outbuf;
218 if (!isonum_711(p->flags)) {
219 ana->fields &= ~ISO_SUSP_SLINK;
220 return ISO_SUSP_SLINK;
229 cd9660_rrip_altname(ISO_RRIP_ALTNAME *p, ISO_RRIP_ANALYZE *ana)
240 case ISO_SUSP_CFLAG_CURRENT:
241 /* Inserting Current */
245 case ISO_SUSP_CFLAG_PARENT:
246 /* Inserting Parent */
250 case ISO_SUSP_CFLAG_HOST:
251 /* Inserting hostname i.e. "kurt.tools.de" */
253 wlen = strlen(hostname);
256 case ISO_SUSP_CFLAG_CONTINUE:
260 /* Inserting component */
261 wlen = isonum_711(p->h.length) - 5;
262 inbuf = (char *)p + 5;
266 printf("RRIP with incorrect NM flags?\n");
267 wlen = ana->maxlen + 1;
271 if ((*ana->outlen += wlen) > ana->maxlen) {
272 /* treat as no name field */
273 ana->fields &= ~ISO_SUSP_ALTNAME;
274 ana->outbuf -= *ana->outlen - wlen;
279 bcopy(inbuf,ana->outbuf,wlen);
283 ana->fields &= ~ISO_SUSP_ALTNAME;
284 return ISO_SUSP_ALTNAME;
290 cd9660_rrip_defname(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
292 isofntrans(isodir->name,isonum_711(isodir->name_len),
293 ana->outbuf,ana->outlen,
294 1,isonum_711(isodir->flags)&4, ana->imp->joliet_level);
295 switch (*ana->outbuf) {
302 /* outlen is 1 already */
303 strcpy(ana->outbuf,"..");
309 * Parent or Child Link
312 cd9660_rrip_pclink(ISO_RRIP_CLINK *p, ISO_RRIP_ANALYZE *ana)
314 *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
315 ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
316 return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
320 * Relocated directory
323 cd9660_rrip_reldir(ISO_RRIP_RELDIR *p, ISO_RRIP_ANALYZE *ana)
325 /* special hack to make caller aware of RE field */
328 return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
332 cd9660_rrip_tstamp(ISO_RRIP_TSTAMP *p, ISO_RRIP_ANALYZE *ana)
338 /* Check a format of time stamp (7bytes/17bytes) */
339 if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
340 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
343 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
344 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime,
348 bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
350 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
351 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime,
355 ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
357 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
358 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime,
361 ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
364 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
367 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
368 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
371 bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
373 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
374 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
377 ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
379 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
380 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
382 ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
385 ana->fields &= ~ISO_SUSP_TSTAMP;
386 return ISO_SUSP_TSTAMP;
390 cd9660_rrip_deftstamp(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
392 cd9660_deftstamp(isodir,ana->inop,NULL,ISO_FTYPE_RRIP);
399 cd9660_rrip_device(ISO_RRIP_DEVICE *p, ISO_RRIP_ANALYZE *ana)
403 high = isonum_733(p->dev_t_high);
404 low = isonum_733(p->dev_t_low);
407 ana->inop->inode.iso_rdev = makeudev(umajor(low), uminor(low));
409 ana->inop->inode.iso_rdev = makeudev(high, uminor(low));
410 ana->fields &= ~ISO_SUSP_DEVICE;
411 return ISO_SUSP_DEVICE;
418 cd9660_rrip_idflag(ISO_RRIP_IDFLAG *p, ISO_RRIP_ANALYZE *ana)
420 ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
421 /* special handling of RE field */
422 if (ana->fields&ISO_SUSP_RELDIR)
423 return cd9660_rrip_reldir(/* XXX */ (ISO_RRIP_RELDIR *)p,ana);
425 return ISO_SUSP_IDFLAG;
429 * Continuation pointer
432 cd9660_rrip_cont(ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana)
434 ana->iso_ce_blk = isonum_733(p->location);
435 ana->iso_ce_off = isonum_733(p->offset);
436 ana->iso_ce_len = isonum_733(p->length);
437 return ISO_SUSP_CONT;
444 cd9660_rrip_stop(ISO_SUSP_HEADER *p, ISO_RRIP_ANALYZE *ana)
446 return ISO_SUSP_STOP;
450 * Extension reference
453 cd9660_rrip_extref(ISO_RRIP_EXTREF *p, ISO_RRIP_ANALYZE *ana)
455 if (isonum_711(p->len_id) != 10
456 || bcmp((char *)p + 8,"RRIP_1991A",10)
457 || isonum_711(p->version) != 1)
459 ana->fields &= ~ISO_SUSP_EXTREF;
460 return ISO_SUSP_EXTREF;
464 cd9660_rrip_loop(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana,
468 ISO_SUSP_HEADER *phead;
469 ISO_SUSP_HEADER *pend;
470 struct buf *bp = NULL;
476 * Note: If name length is odd,
477 * it will be padding 1 byte after the name
479 pwhead = isodir->name + isonum_711(isodir->name_len);
480 if (!(isonum_711(isodir->name_len)&1))
482 isochar(isodir->name, pwhead, ana->imp->joliet_level, &c);
484 /* If it's not the '.' entry of the root dir obey SP field */
485 if (c != 0 || isonum_733(isodir->extent) != ana->imp->root_extent)
486 pwhead += ana->imp->rr_skip;
488 pwhead += ana->imp->rr_skip0;
490 phead = (ISO_SUSP_HEADER *)pwhead;
491 pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
497 * Note: "pend" should be more than one SUSP header
499 while (pend >= phead + 1) {
500 if (isonum_711(phead->version) == 1) {
501 for (ptable = table; ptable->func; ptable++) {
502 if (*phead->type == *ptable->type
503 && phead->type[1] == ptable->type[1]) {
504 result |= ptable->func(phead,ana);
511 if (result&ISO_SUSP_STOP) {
512 result &= ~ISO_SUSP_STOP;
515 /* plausibility check */
516 if (isonum_711(phead->length) < sizeof(*phead))
520 * Hopefully this works with newer versions, too
522 phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
525 if (ana->fields && ana->iso_ce_len) {
526 if (ana->iso_ce_blk >= ana->imp->volume_space_size
527 || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
528 || bread(ana->imp->im_devvp,
530 (ana->imp->im_bshift - DEV_BSHIFT),
531 ana->imp->logical_block_size, &bp))
532 /* what to do now? */
534 phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off);
535 pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
542 * If we don't find the Basic SUSP stuffs, just set default value
543 * (attribute/time stamp)
545 for (ptable = table; ptable->func2; ptable++)
546 if (!(ptable->result&result))
547 ptable->func2(isodir,ana);
556 * XXX the casts are bogus but will do for now.
558 #define BC (rrt_func_t *)
559 static RRIP_TABLE rrip_table_analyze[] = {
560 { "PX", BC cd9660_rrip_attr, cd9660_rrip_defattr, ISO_SUSP_ATTR },
561 { "TF", BC cd9660_rrip_tstamp, cd9660_rrip_deftstamp, ISO_SUSP_TSTAMP },
562 { "PN", BC cd9660_rrip_device, 0, ISO_SUSP_DEVICE },
563 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
564 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
565 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
570 cd9660_rrip_analyze(struct iso_directory_record *isodir, struct iso_node *inop,
573 ISO_RRIP_ANALYZE analyze;
577 analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
579 return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
583 * Get Alternate Name.
585 static RRIP_TABLE rrip_table_getname[] = {
586 { "NM", BC cd9660_rrip_altname, cd9660_rrip_defname, ISO_SUSP_ALTNAME },
587 { "CL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
588 { "PL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
589 { "RE", BC cd9660_rrip_reldir, 0, ISO_SUSP_RELDIR },
590 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
591 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
592 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
597 cd9660_rrip_getname(struct iso_directory_record *isodir, char *outbuf,
598 u_short *outlen, ino_t *inump, struct iso_mnt *imp)
600 ISO_RRIP_ANALYZE analyze;
604 analyze.outbuf = outbuf;
605 analyze.outlen = outlen;
606 analyze.maxlen = NAME_MAX;
607 analyze.inump = inump;
609 analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
612 isochar(isodir->name, isodir->name + isonum_711(isodir->name_len),
613 imp->joliet_level, &c);
614 tab = rrip_table_getname;
615 if (c == 0 || c == 1) {
616 cd9660_rrip_defname(isodir,&analyze);
618 analyze.fields &= ~ISO_SUSP_ALTNAME;
622 return cd9660_rrip_loop(isodir,&analyze,tab);
628 static RRIP_TABLE rrip_table_getsymname[] = {
629 { "SL", BC cd9660_rrip_slink, 0, ISO_SUSP_SLINK },
630 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
631 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
632 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
637 cd9660_rrip_getsymname(struct iso_directory_record *isodir, char *outbuf,
638 u_short *outlen, struct iso_mnt *imp)
640 ISO_RRIP_ANALYZE analyze;
642 analyze.outbuf = outbuf;
643 analyze.outlen = outlen;
645 analyze.maxlen = MAXPATHLEN;
646 analyze.cont = 1; /* don't start with a slash */
648 analyze.fields = ISO_SUSP_SLINK;
650 return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
653 static RRIP_TABLE rrip_table_extref[] = {
654 { "ER", BC cd9660_rrip_extref, 0, ISO_SUSP_EXTREF },
655 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
656 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
661 * Check for Rock Ridge Extension and return offset of its fields.
662 * Note: We insist on the ER field.
665 cd9660_rrip_offset(struct iso_directory_record *isodir, struct iso_mnt *imp)
668 ISO_RRIP_ANALYZE analyze;
671 p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
672 if (bcmp(p,"SP\7\1\276\357",6)) {
673 /* Maybe, it's a CDROM XA disc? */
675 p = (ISO_RRIP_OFFSET *)((char *)p + 15);
676 if (bcmp(p,"SP\7\1\276\357",6))
681 analyze.fields = ISO_SUSP_EXTREF;
682 if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
685 return isonum_711(p->skip);