1 /* $OpenBSD: cd9660_vnops.c,v 1.97 2024/10/18 05:52:32 miod Exp $ */
2 /* $NetBSD: cd9660_vnops.c,v 1.42 1997/10/16 23:56:57 christos Exp $ */
3
4 /*-
5 * Copyright (c) 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley
9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
10 * Support code is derived from software contributed to Berkeley
11 * by Atsushi Murai (amurai@spec.co.jp).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)cd9660_vnops.c 8.15 (Berkeley) 12/5/94
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/namei.h>
43 #include <sys/resourcevar.h>
44 #include <sys/kernel.h>
45 #include <sys/file.h>
46 #include <sys/stat.h>
47 #include <sys/buf.h>
48 #include <sys/conf.h>
49 #include <sys/mount.h>
50 #include <sys/vnode.h>
51 #include <sys/lock.h>
52 #include <sys/malloc.h>
53 #include <sys/pool.h>
54 #include <sys/dirent.h>
55 #include <sys/ioctl.h>
56 #include <sys/ioccom.h>
57 #include <sys/specdev.h>
58 #include <sys/unistd.h>
59
60 #include <miscfs/fifofs/fifo.h>
61
62 #include <isofs/cd9660/iso.h>
63 #include <isofs/cd9660/cd9660_extern.h>
64 #include <isofs/cd9660/cd9660_node.h>
65 #include <isofs/cd9660/iso_rrip.h>
66
67 int cd9660_kqfilter(void *v);
68
69
70 /*
71 * Structure for reading directories
72 */
73 struct isoreaddir {
74 struct dirent saveent;
75 struct dirent assocent;
76 struct dirent current;
77 off_t saveoff;
78 off_t assocoff;
79 off_t curroff;
80 struct uio *uio;
81 off_t uio_off;
82 int eofflag;
83 };
84
85 int iso_uiodir(struct isoreaddir *, struct dirent *, off_t);
86 int iso_shipdir(struct isoreaddir *);
87
88 /*
89 * Setattr call. Only allowed for block and character special devices.
90 */
91 int
cd9660_setattr(void * v)92 cd9660_setattr(void *v)
93 {
94 struct vop_setattr_args *ap = v;
95 struct vnode *vp = ap->a_vp;
96 struct vattr *vap = ap->a_vap;
97
98 if (vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
99 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_nsec != VNOVAL ||
100 vap->va_mtime.tv_nsec != VNOVAL || vap->va_mode != (mode_t)VNOVAL ||
101 (vap->va_vaflags & VA_UTIMES_CHANGE))
102 return (EROFS);
103 if (vap->va_size != VNOVAL) {
104 switch (vp->v_type) {
105 case VDIR:
106 return (EISDIR);
107 case VLNK:
108 case VREG:
109 return (EROFS);
110 case VCHR:
111 case VBLK:
112 case VSOCK:
113 case VFIFO:
114 return (0);
115 default:
116 return (EINVAL);
117 }
118 }
119
120 return (EINVAL);
121 }
122
123 /*
124 * Open called.
125 *
126 * Nothing to do.
127 */
128 int
cd9660_open(void * v)129 cd9660_open(void *v)
130 {
131 return (0);
132 }
133
134 /*
135 * Close called
136 *
137 * Update the times on the inode on writeable file systems.
138 */
139 int
cd9660_close(void * v)140 cd9660_close(void *v)
141 {
142 return (0);
143 }
144
145 /*
146 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
147 * The mode is shifted to select the owner/group/other fields. The
148 * super user is granted all permissions.
149 */
150 int
cd9660_access(void * v)151 cd9660_access(void *v)
152 {
153 struct vop_access_args *ap = v;
154 struct iso_node *ip = VTOI(ap->a_vp);
155
156 return (vaccess(ap->a_vp->v_type, ip->inode.iso_mode & ALLPERMS,
157 ip->inode.iso_uid, ip->inode.iso_gid, ap->a_mode, ap->a_cred));
158 }
159
160 int
cd9660_getattr(void * v)161 cd9660_getattr(void *v)
162 {
163 struct vop_getattr_args *ap = v;
164 struct vnode *vp = ap->a_vp;
165 struct vattr *vap = ap->a_vap;
166 struct iso_node *ip = VTOI(vp);
167
168 vap->va_fsid = ip->i_dev;
169 vap->va_fileid = ip->i_number;
170
171 vap->va_mode = ip->inode.iso_mode & ALLPERMS;
172 vap->va_nlink = ip->inode.iso_links;
173 vap->va_uid = ip->inode.iso_uid;
174 vap->va_gid = ip->inode.iso_gid;
175 vap->va_atime = ip->inode.iso_atime;
176 vap->va_mtime = ip->inode.iso_mtime;
177 vap->va_ctime = ip->inode.iso_ctime;
178 vap->va_rdev = ip->inode.iso_rdev;
179
180 vap->va_size = (u_quad_t) ip->i_size;
181 if (ip->i_size == 0 && vp->v_type == VLNK) {
182 struct vop_readlink_args rdlnk;
183 struct iovec aiov;
184 struct uio auio;
185 char *cp;
186
187 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
188 aiov.iov_base = cp;
189 aiov.iov_len = MAXPATHLEN;
190 auio.uio_iov = &aiov;
191 auio.uio_iovcnt = 1;
192 auio.uio_offset = 0;
193 auio.uio_rw = UIO_READ;
194 auio.uio_segflg = UIO_SYSSPACE;
195 auio.uio_procp = ap->a_p;
196 auio.uio_resid = MAXPATHLEN;
197 rdlnk.a_uio = &auio;
198 rdlnk.a_vp = ap->a_vp;
199 rdlnk.a_cred = ap->a_cred;
200 if (cd9660_readlink(&rdlnk) == 0)
201 vap->va_size = MAXPATHLEN - auio.uio_resid;
202 free(cp, M_TEMP, 0);
203 }
204 vap->va_flags = 0;
205 vap->va_gen = 1;
206 vap->va_blocksize = ip->i_mnt->logical_block_size;
207 vap->va_bytes = (u_quad_t) ip->i_size;
208 vap->va_type = vp->v_type;
209 return (0);
210 }
211
212 /*
213 * Vnode op for reading.
214 */
215 int
cd9660_read(void * v)216 cd9660_read(void *v)
217 {
218 struct vop_read_args *ap = v;
219 struct vnode *vp = ap->a_vp;
220 struct uio *uio = ap->a_uio;
221 struct iso_node *ip = VTOI(vp);
222 struct iso_mnt *imp;
223 struct buf *bp;
224 daddr_t lbn, rablock;
225 off_t diff;
226 int error = 0;
227 long size, on;
228 size_t n;
229
230 if (uio->uio_resid == 0)
231 return (0);
232 if (uio->uio_offset < 0)
233 return (EINVAL);
234 ip->i_flag |= IN_ACCESS;
235 imp = ip->i_mnt;
236 do {
237 struct cluster_info *ci = &ip->i_ci;
238
239 lbn = lblkno(imp, uio->uio_offset);
240 on = blkoff(imp, uio->uio_offset);
241 n = ulmin(imp->logical_block_size - on, uio->uio_resid);
242 diff = (off_t)ip->i_size - uio->uio_offset;
243 if (diff <= 0)
244 return (0);
245 if (diff < n)
246 n = diff;
247 size = blksize(imp, ip, lbn);
248 rablock = lbn + 1;
249 #define MAX_RA 32
250 if (ci->ci_lastr + 1 == lbn) {
251 struct ra {
252 daddr_t blks[MAX_RA];
253 int sizes[MAX_RA];
254 } *ra;
255 int i;
256
257 ra = malloc(sizeof *ra, M_TEMP, M_WAITOK);
258 for (i = 0; i < MAX_RA &&
259 lblktosize(imp, (rablock + i)) < ip->i_size;
260 i++) {
261 ra->blks[i] = rablock + i;
262 ra->sizes[i] = blksize(imp, ip, rablock + i);
263 }
264 error = breadn(vp, lbn, size, ra->blks,
265 ra->sizes, i, &bp);
266 free(ra, M_TEMP, 0);
267 } else
268 error = bread(vp, lbn, size, &bp);
269 ci->ci_lastr = lbn;
270 n = ulmin(n, size - bp->b_resid);
271 if (error) {
272 brelse(bp);
273 return (error);
274 }
275
276 error = uiomove(bp->b_data + on, n, uio);
277
278 brelse(bp);
279 } while (error == 0 && uio->uio_resid > 0 && n != 0);
280 return (error);
281 }
282
283 int
cd9660_ioctl(void * v)284 cd9660_ioctl(void *v)
285 {
286 return (ENOTTY);
287 }
288
289 /*
290 * Mmap a file
291 *
292 * NB Currently unsupported.
293 */
294 int
cd9660_mmap(void * v)295 cd9660_mmap(void *v)
296 {
297
298 return (EINVAL);
299 }
300
301 /*
302 * Seek on a file
303 *
304 * Nothing to do, so just return.
305 */
306 int
cd9660_seek(void * v)307 cd9660_seek(void *v)
308 {
309 return (0);
310 }
311
312 int
iso_uiodir(struct isoreaddir * idp,struct dirent * dp,off_t off)313 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
314 {
315 int error;
316
317 dp->d_name[dp->d_namlen] = 0;
318 dp->d_reclen = DIRENT_SIZE(dp);
319
320 if (memchr(dp->d_name, '/', dp->d_namlen) != NULL) {
321 /* illegal file name */
322 return (EINVAL);
323 }
324
325 if (idp->uio->uio_resid < dp->d_reclen) {
326 idp->eofflag = 0;
327 return (-1);
328 }
329
330 dp->d_off = off;
331 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
332 return (error);
333 idp->uio_off = off;
334 return (0);
335 }
336
337 int
iso_shipdir(struct isoreaddir * idp)338 iso_shipdir(struct isoreaddir *idp)
339 {
340 struct dirent *dp;
341 int cl, sl, assoc;
342 int error;
343 char *cname, *sname;
344
345 cl = idp->current.d_namlen;
346 cname = idp->current.d_name;
347
348 if ((assoc = cl > 1 && *cname == ASSOCCHAR)) {
349 cl--;
350 cname++;
351 }
352
353 dp = &idp->saveent;
354 sname = dp->d_name;
355 if (!(sl = dp->d_namlen)) {
356 dp = &idp->assocent;
357 sname = dp->d_name + 1;
358 sl = dp->d_namlen - 1;
359 }
360 if (sl > 0) {
361 if (sl != cl
362 || bcmp(sname,cname,sl)) {
363 if (idp->assocent.d_namlen) {
364 error = iso_uiodir(idp, &idp->assocent,
365 idp->assocoff);
366 if (error)
367 return (error);
368 idp->assocent.d_namlen = 0;
369 }
370 if (idp->saveent.d_namlen) {
371 error = iso_uiodir(idp, &idp->saveent,
372 idp->saveoff);
373 if (error)
374 return (error);
375 idp->saveent.d_namlen = 0;
376 }
377 }
378 }
379 idp->current.d_reclen = DIRENT_SIZE(&idp->current);
380 if (assoc) {
381 idp->assocoff = idp->curroff;
382 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
383 } else {
384 idp->saveoff = idp->curroff;
385 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
386 }
387 return (0);
388 }
389
390 /*
391 * Vnode op for readdir
392 */
393 int
cd9660_readdir(void * v)394 cd9660_readdir(void *v)
395 {
396 struct vop_readdir_args *ap = v;
397 struct uio *uio = ap->a_uio;
398 struct isoreaddir *idp;
399 struct vnode *vdp = ap->a_vp;
400 struct iso_node *dp;
401 struct iso_mnt *imp;
402 struct buf *bp = NULL;
403 struct iso_directory_record *ep;
404 int entryoffsetinblock;
405 doff_t endsearch;
406 u_long bmask;
407 int error = 0;
408 int reclen;
409 u_short namelen;
410 cdino_t ino;
411
412 dp = VTOI(vdp);
413 imp = dp->i_mnt;
414 bmask = imp->im_bmask;
415
416 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
417
418 /*
419 * These are passed to copyout(), so make sure there's no garbage
420 * being leaked in padding or after short names.
421 */
422 memset(&idp->saveent, 0, sizeof(idp->saveent));
423 memset(&idp->assocent, 0, sizeof(idp->assocent));
424 memset(&idp->current, 0, sizeof(idp->current));
425
426 /*
427 * XXX
428 * Is it worth trying to figure out the type?
429 */
430 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
431 DT_UNKNOWN;
432 idp->uio = uio;
433 idp->eofflag = 1;
434 idp->curroff = uio->uio_offset;
435 idp->uio_off = uio->uio_offset;
436
437 if ((entryoffsetinblock = idp->curroff & bmask) &&
438 (error = cd9660_bufatoff(dp, (off_t)idp->curroff, NULL, &bp))) {
439 free(idp, M_TEMP, 0);
440 return (error);
441 }
442 endsearch = dp->i_size;
443
444 while (idp->curroff < endsearch) {
445 /*
446 * If offset is on a block boundary,
447 * read the next directory block.
448 * Release previous if it exists.
449 */
450 if ((idp->curroff & bmask) == 0) {
451 if (bp != NULL)
452 brelse(bp);
453 error = cd9660_bufatoff(dp, (off_t)idp->curroff,
454 NULL, &bp);
455 if (error)
456 break;
457 entryoffsetinblock = 0;
458 }
459 /*
460 * Get pointer to next entry.
461 */
462 ep = (struct iso_directory_record *)
463 ((char *)bp->b_data + entryoffsetinblock);
464
465 reclen = isonum_711(ep->length);
466 if (reclen == 0) {
467 /* skip to next block, if any */
468 idp->curroff =
469 (idp->curroff & ~bmask) + imp->logical_block_size;
470 continue;
471 }
472
473 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
474 error = EINVAL;
475 /* illegal entry, stop */
476 break;
477 }
478
479 if (entryoffsetinblock + reclen > imp->logical_block_size) {
480 error = EINVAL;
481 /* illegal directory, so stop looking */
482 break;
483 }
484
485 idp->current.d_namlen = isonum_711(ep->name_len);
486
487 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
488 error = EINVAL;
489 /* illegal entry, stop */
490 break;
491 }
492
493 if (isonum_711(ep->flags)&2)
494 ino = isodirino(ep, imp);
495 else
496 ino = dbtob(bp->b_blkno) + entryoffsetinblock;
497
498 idp->curroff += reclen;
499
500 switch (imp->iso_ftype) {
501 case ISO_FTYPE_RRIP:
502 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
503 &ino, imp);
504 idp->current.d_fileno = ino;
505 idp->current.d_namlen = (u_char)namelen;
506 if (idp->current.d_namlen)
507 error = iso_uiodir(idp,&idp->current,idp->curroff);
508 break;
509 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */
510 idp->current.d_fileno = ino;
511 strlcpy(idp->current.d_name,"..",
512 sizeof idp->current.d_name);
513 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
514 idp->current.d_namlen = 1;
515 error = iso_uiodir(idp,&idp->current,idp->curroff);
516 } else if (idp->current.d_namlen == 1 &&
517 ep->name[0] == 1) {
518 idp->current.d_namlen = 2;
519 error = iso_uiodir(idp,&idp->current,idp->curroff);
520 } else {
521 isofntrans(ep->name,idp->current.d_namlen,
522 idp->current.d_name, &namelen,
523 imp->iso_ftype == ISO_FTYPE_9660,
524 isonum_711(ep->flags) & 4,
525 imp->joliet_level);
526 idp->current.d_namlen = (u_char)namelen;
527 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
528 error = iso_shipdir(idp);
529 else
530 error = iso_uiodir(idp,&idp->current,idp->curroff);
531 }
532 }
533 if (error)
534 break;
535
536 entryoffsetinblock += reclen;
537 }
538
539 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
540 idp->current.d_namlen = 0;
541 error = iso_shipdir(idp);
542 }
543 if (error < 0)
544 error = 0;
545
546 if (bp)
547 brelse (bp);
548
549 uio->uio_offset = idp->uio_off;
550 *ap->a_eofflag = idp->eofflag;
551
552 free(idp, M_TEMP, 0);
553
554 return (error);
555 }
556
557 /*
558 * Return target name of a symbolic link
559 * Shouldn't we get the parent vnode and read the data from there?
560 * This could eventually result in deadlocks in cd9660_lookup.
561 * But otherwise the block read here is in the block buffer two times.
562 */
563 typedef struct iso_directory_record ISODIR;
564 typedef struct iso_node ISONODE;
565 typedef struct iso_mnt ISOMNT;
566 int
cd9660_readlink(void * v)567 cd9660_readlink(void *v)
568 {
569 struct vop_readlink_args *ap = v;
570 ISONODE *ip;
571 ISODIR *dirp;
572 ISOMNT *imp;
573 struct buf *bp;
574 struct uio *uio;
575 u_short symlen;
576 int error;
577 char *symname;
578
579 ip = VTOI(ap->a_vp);
580 imp = ip->i_mnt;
581 uio = ap->a_uio;
582
583 if (imp->iso_ftype != ISO_FTYPE_RRIP)
584 return (EINVAL);
585
586 /*
587 * Get parents directory record block that this inode included.
588 */
589 error = bread(imp->im_devvp,
590 (ip->i_number >> imp->im_bshift) <<
591 (imp->im_bshift - DEV_BSHIFT),
592 imp->logical_block_size, &bp);
593 if (error) {
594 brelse(bp);
595 return (EINVAL);
596 }
597
598 /*
599 * Setup the directory pointer for this inode
600 */
601 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
602
603 /*
604 * Just make sure, we have a right one....
605 * 1: Check not cross boundary on block
606 */
607 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
608 > imp->logical_block_size) {
609 brelse(bp);
610 return (EINVAL);
611 }
612
613 /*
614 * Now get a buffer
615 * Abuse a namei buffer for now.
616 */
617 if (uio->uio_segflg == UIO_SYSSPACE &&
618 uio->uio_iov->iov_len >= MAXPATHLEN)
619 symname = uio->uio_iov->iov_base;
620 else
621 symname = pool_get(&namei_pool, PR_WAITOK);
622
623 /*
624 * Ok, we just gathering a symbolic name in SL record.
625 */
626 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
627 if (uio->uio_segflg != UIO_SYSSPACE ||
628 uio->uio_iov->iov_len < MAXPATHLEN)
629 pool_put(&namei_pool, symname);
630 brelse(bp);
631 return (EINVAL);
632 }
633 /*
634 * Don't forget before you leave from home ;-)
635 */
636 brelse(bp);
637
638 /*
639 * return with the symbolic name to caller's.
640 */
641 if (uio->uio_segflg != UIO_SYSSPACE ||
642 uio->uio_iov->iov_len < MAXPATHLEN) {
643 error = uiomove(symname, symlen, uio);
644 pool_put(&namei_pool, symname);
645 return (error);
646 }
647 uio->uio_resid -= symlen;
648 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
649 uio->uio_iov->iov_len -= symlen;
650 return (0);
651 }
652
653 int
cd9660_link(void * v)654 cd9660_link(void *v)
655 {
656 struct vop_link_args *ap = v;
657
658 VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
659 vput(ap->a_dvp);
660 return (EROFS);
661 }
662
663 int
cd9660_symlink(void * v)664 cd9660_symlink(void *v)
665 {
666 struct vop_symlink_args *ap = v;
667
668 VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
669 vput(ap->a_dvp);
670 return (EROFS);
671 }
672
673 /*
674 * Lock an inode.
675 */
676 int
cd9660_lock(void * v)677 cd9660_lock(void *v)
678 {
679 struct vop_lock_args *ap = v;
680 struct vnode *vp = ap->a_vp;
681
682 return rrw_enter(&VTOI(vp)->i_lock, ap->a_flags & LK_RWFLAGS);
683 }
684
685 /*
686 * Unlock an inode.
687 */
688 int
cd9660_unlock(void * v)689 cd9660_unlock(void *v)
690 {
691 struct vop_unlock_args *ap = v;
692 struct vnode *vp = ap->a_vp;
693
694 rrw_exit(&VTOI(vp)->i_lock);
695 return 0;
696 }
697
698 /*
699 * Calculate the logical to physical mapping if not done already,
700 * then call the device strategy routine.
701 */
702 int
cd9660_strategy(void * v)703 cd9660_strategy(void *v)
704 {
705 struct vop_strategy_args *ap = v;
706 struct buf *bp = ap->a_bp;
707 struct vnode *vp = bp->b_vp;
708 struct iso_node *ip;
709 int error;
710 int s;
711
712 ip = VTOI(vp);
713 if (vp->v_type == VBLK || vp->v_type == VCHR)
714 panic("cd9660_strategy: spec");
715 if (bp->b_blkno == bp->b_lblkno) {
716 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL);
717 if (error) {
718 bp->b_error = error;
719 bp->b_flags |= B_ERROR;
720 s = splbio();
721 biodone(bp);
722 splx(s);
723 return (error);
724 }
725 if ((long)bp->b_blkno == -1)
726 clrbuf(bp);
727 }
728 if ((long)bp->b_blkno == -1) {
729 s = splbio();
730 biodone(bp);
731 splx(s);
732 return (0);
733 }
734 vp = ip->i_devvp;
735 bp->b_dev = vp->v_rdev;
736 VOP_STRATEGY(vp, bp);
737 return (0);
738 }
739
740 /*
741 * Print out the contents of an inode.
742 */
743 int
cd9660_print(void * v)744 cd9660_print(void *v)
745 {
746 #if defined(DEBUG) || defined(DIAGNOSTIC) || defined(VFSLCKDEBUG)
747 printf("tag VT_ISOFS, isofs vnode\n");
748 #endif
749 return (0);
750 }
751
752 /*
753 * Check for a locked inode.
754 */
755 int
cd9660_islocked(void * v)756 cd9660_islocked(void *v)
757 {
758 struct vop_islocked_args *ap = v;
759
760 return rrw_status(&VTOI(ap->a_vp)->i_lock);
761 }
762
763 /*
764 * Return POSIX pathconf information applicable to cd9660 filesystems.
765 */
766 int
cd9660_pathconf(void * v)767 cd9660_pathconf(void *v)
768 {
769 struct vop_pathconf_args *ap = v;
770 int error = 0;
771
772 switch (ap->a_name) {
773 case _PC_LINK_MAX:
774 *ap->a_retval = 1;
775 break;
776 case _PC_NAME_MAX:
777 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
778 *ap->a_retval = NAME_MAX;
779 else
780 *ap->a_retval = 37;
781 break;
782 case _PC_CHOWN_RESTRICTED:
783 *ap->a_retval = 1;
784 break;
785 case _PC_NO_TRUNC:
786 *ap->a_retval = 1;
787 break;
788 case _PC_TIMESTAMP_RESOLUTION:
789 *ap->a_retval = 1000000000; /* one billion nanoseconds */
790 break;
791 default:
792 error = EINVAL;
793 break;
794 }
795
796 return (error);
797 }
798
799 /*
800 * Global vfs data structures for isofs
801 */
802
803 /* Global vfs data structures for cd9660. */
804 const struct vops cd9660_vops = {
805 .vop_lookup = cd9660_lookup,
806 .vop_create = eopnotsupp,
807 .vop_mknod = eopnotsupp,
808 .vop_open = cd9660_open,
809 .vop_close = cd9660_close,
810 .vop_access = cd9660_access,
811 .vop_getattr = cd9660_getattr,
812 .vop_setattr = cd9660_setattr,
813 .vop_read = cd9660_read,
814 .vop_write = eopnotsupp,
815 .vop_ioctl = cd9660_ioctl,
816 .vop_kqfilter = cd9660_kqfilter,
817 .vop_revoke = vop_generic_revoke,
818 .vop_fsync = nullop,
819 .vop_remove = eopnotsupp,
820 .vop_link = cd9660_link,
821 .vop_rename = eopnotsupp,
822 .vop_mkdir = eopnotsupp,
823 .vop_rmdir = eopnotsupp,
824 .vop_symlink = cd9660_symlink,
825 .vop_readdir = cd9660_readdir,
826 .vop_readlink = cd9660_readlink,
827 .vop_abortop = vop_generic_abortop,
828 .vop_inactive = cd9660_inactive,
829 .vop_reclaim = cd9660_reclaim,
830 .vop_lock = cd9660_lock,
831 .vop_unlock = cd9660_unlock,
832 .vop_bmap = cd9660_bmap,
833 .vop_strategy = cd9660_strategy,
834 .vop_print = cd9660_print,
835 .vop_islocked = cd9660_islocked,
836 .vop_pathconf = cd9660_pathconf,
837 .vop_advlock = eopnotsupp,
838 .vop_bwrite = vop_generic_bwrite,
839 };
840
841 /* Special device vnode ops */
842 const struct vops cd9660_specvops = {
843 .vop_access = cd9660_access,
844 .vop_getattr = cd9660_getattr,
845 .vop_setattr = cd9660_setattr,
846 .vop_inactive = cd9660_inactive,
847 .vop_reclaim = cd9660_reclaim,
848 .vop_lock = cd9660_lock,
849 .vop_unlock = cd9660_unlock,
850 .vop_print = cd9660_print,
851 .vop_islocked = cd9660_islocked,
852
853 /* XXX: Keep in sync with spec_vops. */
854 .vop_lookup = vop_generic_lookup,
855 .vop_create = vop_generic_badop,
856 .vop_mknod = vop_generic_badop,
857 .vop_open = spec_open,
858 .vop_close = spec_close,
859 .vop_read = spec_read,
860 .vop_write = spec_write,
861 .vop_ioctl = spec_ioctl,
862 .vop_kqfilter = spec_kqfilter,
863 .vop_revoke = vop_generic_revoke,
864 .vop_fsync = spec_fsync,
865 .vop_remove = vop_generic_badop,
866 .vop_link = vop_generic_badop,
867 .vop_rename = vop_generic_badop,
868 .vop_mkdir = vop_generic_badop,
869 .vop_rmdir = vop_generic_badop,
870 .vop_symlink = vop_generic_badop,
871 .vop_readdir = vop_generic_badop,
872 .vop_readlink = vop_generic_badop,
873 .vop_abortop = vop_generic_badop,
874 .vop_bmap = vop_generic_bmap,
875 .vop_strategy = spec_strategy,
876 .vop_pathconf = spec_pathconf,
877 .vop_advlock = spec_advlock,
878 .vop_bwrite = vop_generic_bwrite,
879 };
880
881 #ifdef FIFO
882 const struct vops cd9660_fifovops = {
883 .vop_access = cd9660_access,
884 .vop_getattr = cd9660_getattr,
885 .vop_setattr = cd9660_setattr,
886 .vop_inactive = cd9660_inactive,
887 .vop_reclaim = cd9660_reclaim,
888 .vop_lock = cd9660_lock,
889 .vop_unlock = cd9660_unlock,
890 .vop_print = cd9660_print,
891 .vop_islocked = cd9660_islocked,
892 .vop_bwrite = vop_generic_bwrite,
893
894 /* XXX: Keep in sync with fifo_vops. */
895 .vop_lookup = vop_generic_lookup,
896 .vop_create = vop_generic_badop,
897 .vop_mknod = vop_generic_badop,
898 .vop_open = fifo_open,
899 .vop_close = fifo_close,
900 .vop_read = fifo_read,
901 .vop_write = fifo_write,
902 .vop_ioctl = fifo_ioctl,
903 .vop_kqfilter = fifo_kqfilter,
904 .vop_revoke = vop_generic_revoke,
905 .vop_fsync = nullop,
906 .vop_remove = vop_generic_badop,
907 .vop_link = vop_generic_badop,
908 .vop_rename = vop_generic_badop,
909 .vop_mkdir = vop_generic_badop,
910 .vop_rmdir = vop_generic_badop,
911 .vop_symlink = vop_generic_badop,
912 .vop_readdir = vop_generic_badop,
913 .vop_readlink = vop_generic_badop,
914 .vop_abortop = vop_generic_badop,
915 .vop_bmap = vop_generic_bmap,
916 .vop_strategy = vop_generic_badop,
917 .vop_pathconf = fifo_pathconf,
918 .vop_advlock = fifo_advlock,
919 };
920 #endif /* FIFO */
921
922 void filt_cd9660detach(struct knote *kn);
923 int filt_cd9660read(struct knote *kn, long hint);
924 int filt_cd9660write(struct knote *kn, long hint);
925 int filt_cd9660vnode(struct knote *kn, long hint);
926
927 const struct filterops cd9660read_filtops = {
928 .f_flags = FILTEROP_ISFD,
929 .f_attach = NULL,
930 .f_detach = filt_cd9660detach,
931 .f_event = filt_cd9660read,
932 };
933
934 const struct filterops cd9660write_filtops = {
935 .f_flags = FILTEROP_ISFD,
936 .f_attach = NULL,
937 .f_detach = filt_cd9660detach,
938 .f_event = filt_cd9660write,
939 };
940
941 const struct filterops cd9660vnode_filtops = {
942 .f_flags = FILTEROP_ISFD,
943 .f_attach = NULL,
944 .f_detach = filt_cd9660detach,
945 .f_event = filt_cd9660vnode,
946 };
947
948 int
cd9660_kqfilter(void * v)949 cd9660_kqfilter(void *v)
950 {
951 struct vop_kqfilter_args *ap = v;
952 struct vnode *vp = ap->a_vp;
953 struct knote *kn = ap->a_kn;
954
955 switch (kn->kn_filter) {
956 case EVFILT_READ:
957 kn->kn_fop = &cd9660read_filtops;
958 break;
959 case EVFILT_WRITE:
960 kn->kn_fop = &cd9660write_filtops;
961 break;
962 case EVFILT_VNODE:
963 kn->kn_fop = &cd9660vnode_filtops;
964 break;
965 default:
966 return (EINVAL);
967 }
968
969 kn->kn_hook = (caddr_t)vp;
970
971 klist_insert_locked(&vp->v_klist, kn);
972
973 return (0);
974 }
975
976 void
filt_cd9660detach(struct knote * kn)977 filt_cd9660detach(struct knote *kn)
978 {
979 struct vnode *vp = (struct vnode *)kn->kn_hook;
980
981 klist_remove_locked(&vp->v_klist, kn);
982 }
983
984 int
filt_cd9660read(struct knote * kn,long hint)985 filt_cd9660read(struct knote *kn, long hint)
986 {
987 struct vnode *vp = (struct vnode *)kn->kn_hook;
988 struct iso_node *node = VTOI(vp);
989
990 /*
991 * filesystem is gone, so set the EOF flag and schedule
992 * the knote for deletion.
993 */
994 if (hint == NOTE_REVOKE) {
995 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
996 return (1);
997 }
998
999 kn->kn_data = node->i_size - foffset(kn->kn_fp);
1000 if (kn->kn_data == 0 && kn->kn_sfflags & NOTE_EOF) {
1001 kn->kn_fflags |= NOTE_EOF;
1002 return (1);
1003 }
1004
1005 if (kn->kn_flags & (__EV_POLL | __EV_SELECT))
1006 return (1);
1007
1008 return (kn->kn_data != 0);
1009 }
1010
1011 int
filt_cd9660write(struct knote * kn,long hint)1012 filt_cd9660write(struct knote *kn, long hint)
1013 {
1014 /*
1015 * filesystem is gone, so set the EOF flag and schedule
1016 * the knote for deletion.
1017 */
1018 if (hint == NOTE_REVOKE) {
1019 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
1020 return (1);
1021 }
1022
1023 kn->kn_data = 0;
1024 return (1);
1025 }
1026
1027 int
filt_cd9660vnode(struct knote * kn,long hint)1028 filt_cd9660vnode(struct knote *kn, long hint)
1029 {
1030 if (kn->kn_sfflags & hint)
1031 kn->kn_fflags |= hint;
1032 if (hint == NOTE_REVOKE) {
1033 kn->kn_flags |= EV_EOF;
1034 return (1);
1035 }
1036 return (kn->kn_fflags != 0);
1037 }
1038