2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley
8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
9 * Support code is derived from software contributed to Berkeley
10 * by Atsushi Murai (amurai@spec.co.jp).
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)cd9660_rrip.c 8.6 (Berkeley) 12/5/94
39 #include <sys/cdefs.h>
40 #include <sys/param.h>
41 #include <sys/systm.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
47 #include <sys/kernel.h>
49 #include <fs/cd9660/iso.h>
50 #include <fs/cd9660/cd9660_node.h>
51 #include <fs/cd9660/cd9660_rrip.h>
52 #include <fs/cd9660/iso_rrip.h>
54 typedef int rrt_func_t(void *, ISO_RRIP_ANALYZE *ana);
59 void (*func2)(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana);
63 static int cd9660_rrip_altname(ISO_RRIP_ALTNAME *p, ISO_RRIP_ANALYZE *ana);
64 static int cd9660_rrip_attr(ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana);
65 static int cd9660_rrip_cont(ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana);
66 static void cd9660_rrip_defattr(struct iso_directory_record *isodir,
67 ISO_RRIP_ANALYZE *ana);
68 static void cd9660_rrip_defname(struct iso_directory_record *isodir,
69 ISO_RRIP_ANALYZE *ana);
70 static void cd9660_rrip_deftstamp(struct iso_directory_record *isodir,
71 ISO_RRIP_ANALYZE *ana);
72 static int cd9660_rrip_device(ISO_RRIP_DEVICE *p, ISO_RRIP_ANALYZE *ana);
73 static int cd9660_rrip_extref(ISO_RRIP_EXTREF *p, ISO_RRIP_ANALYZE *ana);
74 static int cd9660_rrip_idflag(ISO_RRIP_IDFLAG *p, ISO_RRIP_ANALYZE *ana);
75 static int cd9660_rrip_loop(struct iso_directory_record *isodir,
76 ISO_RRIP_ANALYZE *ana, RRIP_TABLE *table);
77 static int cd9660_rrip_pclink(ISO_RRIP_CLINK *p, ISO_RRIP_ANALYZE *ana);
78 static int cd9660_rrip_reldir(ISO_RRIP_RELDIR *p, ISO_RRIP_ANALYZE *ana);
79 static int cd9660_rrip_slink(ISO_RRIP_SLINK *p, ISO_RRIP_ANALYZE *ana);
80 static int cd9660_rrip_stop(ISO_SUSP_HEADER *p, ISO_RRIP_ANALYZE *ana);
81 static int cd9660_rrip_tstamp(ISO_RRIP_TSTAMP *p, ISO_RRIP_ANALYZE *ana);
84 * POSIX file attribute
87 cd9660_rrip_attr(ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana)
89 ana->inop->inode.iso_mode = isonum_733(p->mode);
90 ana->inop->inode.iso_uid = isonum_733(p->uid);
91 ana->inop->inode.iso_gid = isonum_733(p->gid);
92 ana->inop->inode.iso_links = isonum_733(p->links);
93 ana->fields &= ~ISO_SUSP_ATTR;
98 cd9660_rrip_defattr(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
100 /* But this is a required field! */
101 printf("RRIP without PX field?\n");
102 cd9660_defattr(isodir,ana->inop,NULL,ISO_FTYPE_RRIP);
109 cd9660_rrip_slink(ISO_RRIP_SLINK *p, ISO_RRIP_ANALYZE *ana)
111 ISO_RRIP_SLINK_COMPONENT *pcomp;
112 ISO_RRIP_SLINK_COMPONENT *pcompe;
114 char *outbuf, *inbuf;
115 char hostbuf[MAXHOSTNAMELEN];
117 pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
118 pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length));
120 outbuf = ana->outbuf;
124 * Gathering a Symbolic name from each component with path
128 pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
129 + isonum_711(pcomp->clen))) {
131 if (len < ana->maxlen) {
141 switch (*pcomp->cflag) {
142 case ISO_SUSP_CFLAG_CURRENT:
143 /* Inserting Current */
147 case ISO_SUSP_CFLAG_PARENT:
148 /* Inserting Parent */
152 case ISO_SUSP_CFLAG_ROOT:
153 /* Inserting slash for ROOT */
154 /* Double slash, nothing really to do here. */
157 case ISO_SUSP_CFLAG_VOLROOT:
158 /* Inserting a mount point i.e. "/cdrom" */
162 inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
163 wlen = strlen(inbuf);
166 case ISO_SUSP_CFLAG_HOST:
167 /* Inserting hostname i.e. "kurt.tools.de" */
168 getcredhostname(curthread->td_ucred, hostbuf,
171 wlen = strlen(inbuf);
174 case ISO_SUSP_CFLAG_CONTINUE:
178 /* Inserting component */
179 wlen = isonum_711(pcomp->clen);
183 printf("RRIP with incorrect flags?");
184 wlen = ana->maxlen + 1;
188 if (len + wlen > ana->maxlen) {
189 /* indicate error to caller */
192 ana->outbuf -= *ana->outlen;
197 memcpy(outbuf, inbuf, wlen);
201 ana->outbuf = outbuf;
205 if (!isonum_711(p->flags)) {
206 ana->fields &= ~ISO_SUSP_SLINK;
207 return ISO_SUSP_SLINK;
216 cd9660_rrip_altname(ISO_RRIP_ALTNAME *p, ISO_RRIP_ANALYZE *ana)
221 char hostbuf[MAXHOSTNAMELEN];
228 case ISO_SUSP_CFLAG_CURRENT:
229 /* Inserting Current */
233 case ISO_SUSP_CFLAG_PARENT:
234 /* Inserting Parent */
238 case ISO_SUSP_CFLAG_HOST:
239 /* Inserting hostname i.e. "kurt.tools.de" */
240 getcredhostname(curthread->td_ucred, hostbuf, sizeof(hostbuf));
242 wlen = strlen(inbuf);
245 case ISO_SUSP_CFLAG_CONTINUE:
249 /* Inserting component */
250 wlen = isonum_711(p->h.length) - 5;
251 inbuf = (char *)p + 5;
255 printf("RRIP with incorrect NM flags?\n");
256 wlen = ana->maxlen + 1;
260 if ((*ana->outlen += wlen) > ana->maxlen) {
261 /* treat as no name field */
262 ana->fields &= ~ISO_SUSP_ALTNAME;
263 ana->outbuf -= *ana->outlen - wlen;
268 memcpy(ana->outbuf, inbuf, wlen);
272 ana->fields &= ~ISO_SUSP_ALTNAME;
273 return ISO_SUSP_ALTNAME;
279 cd9660_rrip_defname(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
281 isofntrans(isodir->name,isonum_711(isodir->name_len),
282 ana->outbuf,ana->outlen,
283 1,isonum_711(isodir->flags)&4, ana->imp->joliet_level,
284 ana->imp->im_flags, ana->imp->im_d2l);
285 switch (*ana->outbuf) {
292 /* outlen is 1 already */
293 strcpy(ana->outbuf,"..");
299 * Parent or Child Link
302 cd9660_rrip_pclink(ISO_RRIP_CLINK *p, ISO_RRIP_ANALYZE *ana)
304 *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
305 ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
306 return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
310 * Relocated directory
313 cd9660_rrip_reldir(ISO_RRIP_RELDIR *p, ISO_RRIP_ANALYZE *ana)
315 /* special hack to make caller aware of RE field */
318 return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
322 cd9660_rrip_tstamp(ISO_RRIP_TSTAMP *p, ISO_RRIP_ANALYZE *ana)
328 /* Check a format of time stamp (7bytes/17bytes) */
329 if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
330 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
333 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
334 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime,
338 memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
340 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
341 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime,
345 ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
347 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
348 cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime,
351 ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
354 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
357 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
358 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
361 memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
363 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
364 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
367 ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
369 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
370 cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
372 ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
374 ana->fields &= ~ISO_SUSP_TSTAMP;
375 return ISO_SUSP_TSTAMP;
379 cd9660_rrip_deftstamp(struct iso_directory_record *isodir,
380 ISO_RRIP_ANALYZE *ana)
382 cd9660_deftstamp(isodir,ana->inop,NULL,ISO_FTYPE_RRIP);
389 cd9660_rrip_device(ISO_RRIP_DEVICE *p, ISO_RRIP_ANALYZE *ana)
393 high = isonum_733(p->dev_t_high);
394 low = isonum_733(p->dev_t_low);
397 ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
399 ana->inop->inode.iso_rdev = makedev(high, minor(low));
400 ana->fields &= ~ISO_SUSP_DEVICE;
401 return ISO_SUSP_DEVICE;
408 cd9660_rrip_idflag(ISO_RRIP_IDFLAG *p, ISO_RRIP_ANALYZE *ana)
410 ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
411 /* special handling of RE field */
412 if (ana->fields&ISO_SUSP_RELDIR)
413 return cd9660_rrip_reldir(/* XXX */ (ISO_RRIP_RELDIR *)p,ana);
415 return ISO_SUSP_IDFLAG;
419 * Continuation pointer
422 cd9660_rrip_cont(ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana)
424 ana->iso_ce_blk = isonum_733(p->location);
425 ana->iso_ce_off = isonum_733(p->offset);
426 ana->iso_ce_len = isonum_733(p->length);
427 return ISO_SUSP_CONT;
434 cd9660_rrip_stop(ISO_SUSP_HEADER *p, ISO_RRIP_ANALYZE *ana)
436 return ISO_SUSP_STOP;
440 * Extension reference
443 cd9660_rrip_extref(ISO_RRIP_EXTREF *p, ISO_RRIP_ANALYZE *ana)
445 if ( ! ((isonum_711(p->len_id) == 10
446 && bcmp((char *)p + 8,"RRIP_1991A",10) == 0)
447 || (isonum_711(p->len_id) == 10
448 && bcmp((char *)p + 8,"IEEE_P1282",10) == 0)
449 || (isonum_711(p->len_id) == 9
450 && bcmp((char *)p + 8,"IEEE_1282", 9) == 0))
451 || isonum_711(p->version) != 1)
453 ana->fields &= ~ISO_SUSP_EXTREF;
454 return ISO_SUSP_EXTREF;
458 cd9660_rrip_loop(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana,
462 ISO_SUSP_HEADER *phead;
463 ISO_SUSP_HEADER *pend;
464 struct buf *bp = NULL;
470 * Note: If name length is odd,
471 * it will be padding 1 byte after the name
473 pwhead = isodir->name + isonum_711(isodir->name_len);
474 if (!(isonum_711(isodir->name_len)&1))
476 isochar(isodir->name, pwhead, ana->imp->joliet_level, &c, NULL,
477 ana->imp->im_flags, ana->imp->im_d2l);
479 /* If it's not the '.' entry of the root dir obey SP field */
480 if (c != 0 || isonum_733(isodir->extent) != ana->imp->root_extent)
481 pwhead += ana->imp->rr_skip;
483 pwhead += ana->imp->rr_skip0;
485 phead = (ISO_SUSP_HEADER *)pwhead;
486 pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
492 * Note: "pend" should be more than one SUSP header
494 while (pend >= phead + 1) {
495 if (isonum_711(phead->version) == 1) {
496 for (ptable = table; ptable->func; ptable++) {
497 if (*phead->type == *ptable->type
498 && phead->type[1] == ptable->type[1]) {
499 result |= ptable->func(phead,ana);
506 if (result&ISO_SUSP_STOP) {
507 result &= ~ISO_SUSP_STOP;
510 /* plausibility check */
511 if (isonum_711(phead->length) < sizeof(*phead))
515 * Hopefully this works with newer versions, too
517 phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
520 if (ana->fields && ana->iso_ce_len) {
521 if (ana->iso_ce_blk >= ana->imp->volume_space_size ||
522 ana->iso_ce_off + ana->iso_ce_len >
523 ana->imp->logical_block_size)
529 if (bread(ana->imp->im_devvp,
531 (ana->imp->im_bshift - DEV_BSHIFT),
532 ana->imp->logical_block_size, NOCRED, &bp) != 0)
533 /* what to do now? */
535 phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off);
536 pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
543 * If we don't find the Basic SUSP stuffs, just set default value
544 * (attribute/time stamp)
546 for (ptable = table; ptable->func2; ptable++)
547 if (!(ptable->result&result))
548 ptable->func2(isodir,ana);
557 * XXX the casts are bogus but will do for now.
559 #define BC (rrt_func_t *)
560 static RRIP_TABLE rrip_table_analyze[] = {
561 { "PX", BC cd9660_rrip_attr, cd9660_rrip_defattr, ISO_SUSP_ATTR },
562 { "TF", BC cd9660_rrip_tstamp, cd9660_rrip_deftstamp, ISO_SUSP_TSTAMP },
563 { "PN", BC cd9660_rrip_device, 0, ISO_SUSP_DEVICE },
564 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
565 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
566 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
571 cd9660_rrip_analyze(struct iso_directory_record *isodir, struct iso_node *inop,
574 ISO_RRIP_ANALYZE analyze;
578 analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
580 return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
584 * Get Alternate Name.
586 static RRIP_TABLE rrip_table_getname[] = {
587 { "NM", BC cd9660_rrip_altname, cd9660_rrip_defname, ISO_SUSP_ALTNAME },
588 { "CL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
589 { "PL", BC cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
590 { "RE", BC cd9660_rrip_reldir, 0, ISO_SUSP_RELDIR },
591 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
592 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
593 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
598 cd9660_rrip_getname(struct iso_directory_record *isodir, char *outbuf,
599 u_short *outlen, cd_ino_t *inump, struct iso_mnt *imp)
601 ISO_RRIP_ANALYZE analyze;
605 analyze.outbuf = outbuf;
606 analyze.outlen = outlen;
607 analyze.maxlen = NAME_MAX;
608 analyze.inump = inump;
610 analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
613 isochar(isodir->name, isodir->name + isonum_711(isodir->name_len),
614 imp->joliet_level, &c, NULL, imp->im_flags, imp->im_d2l);
615 tab = rrip_table_getname;
616 if (c == 0 || c == 1) {
617 cd9660_rrip_defname(isodir,&analyze);
619 analyze.fields &= ~ISO_SUSP_ALTNAME;
623 return cd9660_rrip_loop(isodir,&analyze,tab);
629 static RRIP_TABLE rrip_table_getsymname[] = {
630 { "SL", BC cd9660_rrip_slink, 0, ISO_SUSP_SLINK },
631 { "RR", BC cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
632 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
633 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
638 cd9660_rrip_getsymname(struct iso_directory_record *isodir, char *outbuf,
639 u_short *outlen, struct iso_mnt *imp)
641 ISO_RRIP_ANALYZE analyze;
643 analyze.outbuf = outbuf;
644 analyze.outlen = outlen;
646 analyze.maxlen = MAXPATHLEN;
647 analyze.cont = 1; /* don't start with a slash */
649 analyze.fields = ISO_SUSP_SLINK;
651 return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
654 static RRIP_TABLE rrip_table_extref[] = {
655 { "ER", BC cd9660_rrip_extref, 0, ISO_SUSP_EXTREF },
656 { "CE", BC cd9660_rrip_cont, 0, ISO_SUSP_CONT },
657 { "ST", BC cd9660_rrip_stop, 0, ISO_SUSP_STOP },
662 * Check for Rock Ridge Extension and return offset of its fields.
663 * Note: We insist on the ER field.
666 cd9660_rrip_offset(struct iso_directory_record *isodir, struct iso_mnt *imp)
669 ISO_RRIP_ANALYZE analyze;
672 p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
673 if (bcmp(p,"SP\7\1\276\357",6)) {
674 /* Maybe, it's a CDROM XA disc? */
676 p = (ISO_RRIP_OFFSET *)((char *)p + 15);
677 if (bcmp(p,"SP\7\1\276\357",6))
682 analyze.fields = ISO_SUSP_EXTREF;
683 if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
686 return isonum_711(p->skip);