1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994
5 * The Regents of the University of California. All rights reserved.
6 *
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).
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 *
36 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
37 */
38
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/namei.h>
45 #include <sys/kernel.h>
46 #include <sys/conf.h>
47 #include <sys/stat.h>
48 #include <sys/bio.h>
49 #include <sys/buf.h>
50 #include <sys/mount.h>
51 #include <sys/vnode.h>
52 #include <sys/malloc.h>
53 #include <sys/dirent.h>
54 #include <sys/unistd.h>
55 #include <sys/filio.h>
56 #include <sys/sysctl.h>
57
58 #include <vm/vm.h>
59 #include <vm/vnode_pager.h>
60 #include <vm/uma.h>
61
62 #include <fs/cd9660/iso.h>
63 #include <fs/cd9660/cd9660_node.h>
64 #include <fs/cd9660/iso_rrip.h>
65
66 static vop_setattr_t cd9660_setattr;
67 static vop_open_t cd9660_open;
68 static vop_access_t cd9660_access;
69 static vop_getattr_t cd9660_getattr;
70 static vop_ioctl_t cd9660_ioctl;
71 static vop_pathconf_t cd9660_pathconf;
72 static vop_read_t cd9660_read;
73 struct isoreaddir;
74 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
75 static int iso_shipdir(struct isoreaddir *idp);
76 static vop_readdir_t cd9660_readdir;
77 static vop_readlink_t cd9660_readlink;
78 static vop_strategy_t cd9660_strategy;
79 static vop_vptofh_t cd9660_vptofh;
80 static vop_getpages_t cd9660_getpages;
81
82 /*
83 * Setattr call. Only allowed for block and character special devices.
84 */
85 static int
86 cd9660_setattr(struct vop_setattr_args *ap)
87 {
88 struct vnode *vp = ap->a_vp;
89 struct vattr *vap = ap->a_vap;
90
91 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
92 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
93 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
94 return (EROFS);
95 if (vap->va_size != (u_quad_t)VNOVAL) {
96 switch (vp->v_type) {
97 case VDIR:
98 return (EISDIR);
99 case VLNK:
100 case VREG:
101 return (EROFS);
102 case VCHR:
103 case VBLK:
104 case VSOCK:
105 case VFIFO:
106 case VNON:
107 case VBAD:
108 case VMARKER:
109 return (0);
110 }
111 }
112 return (0);
113 }
114
115 /*
116 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
117 * The mode is shifted to select the owner/group/other fields. The
118 * super user is granted all permissions.
119 */
120 /* ARGSUSED */
121 static int
122 cd9660_access(struct vop_access_args *ap)
123 {
124 struct vnode *vp = ap->a_vp;
125 struct iso_node *ip = VTOI(vp);
126 accmode_t accmode = ap->a_accmode;
127
128 if (vp->v_type == VCHR || vp->v_type == VBLK)
129 return (EOPNOTSUPP);
130
131 /*
132 * Disallow write attempts unless the file is a socket,
133 * fifo, or a block or character device resident on the
134 * filesystem.
135 */
136 if (accmode & VWRITE) {
137 switch (vp->v_type) {
138 case VDIR:
139 case VLNK:
140 case VREG:
141 return (EROFS);
142 /* NOT REACHED */
143 default:
144 break;
145 }
146 }
147
148 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
149 ip->inode.iso_gid, ap->a_accmode, ap->a_cred));
150 }
151
152 static int
153 cd9660_open(struct vop_open_args *ap)
154 {
155 struct vnode *vp = ap->a_vp;
156 struct iso_node *ip = VTOI(vp);
157
158 if (vp->v_type == VCHR || vp->v_type == VBLK)
159 return (EOPNOTSUPP);
160
161 vnode_create_vobject(vp, ip->i_size, ap->a_td);
162 return (0);
163 }
164
165 static int
166 cd9660_getattr(struct vop_getattr_args *ap)
167
168 {
169 struct vnode *vp = ap->a_vp;
170 struct vattr *vap = ap->a_vap;
171 struct iso_node *ip = VTOI(vp);
172
173 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
174 vap->va_fileid = ip->i_number;
175
176 vap->va_mode = ip->inode.iso_mode;
177 vap->va_nlink = ip->inode.iso_links;
178 vap->va_uid = ip->inode.iso_uid;
179 vap->va_gid = ip->inode.iso_gid;
180 vap->va_atime = ip->inode.iso_atime;
181 vap->va_mtime = ip->inode.iso_mtime;
182 vap->va_ctime = ip->inode.iso_ctime;
183 vap->va_rdev = ip->inode.iso_rdev;
184
185 vap->va_size = (u_quad_t) ip->i_size;
186 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
187 struct vop_readlink_args rdlnk;
188 struct iovec aiov;
189 struct uio auio;
190 char *cp;
191
192 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
193 aiov.iov_base = cp;
194 aiov.iov_len = MAXPATHLEN;
195 auio.uio_iov = &aiov;
196 auio.uio_iovcnt = 1;
197 auio.uio_offset = 0;
198 auio.uio_rw = UIO_READ;
199 auio.uio_segflg = UIO_SYSSPACE;
200 auio.uio_td = curthread;
201 auio.uio_resid = MAXPATHLEN;
202 rdlnk.a_uio = &auio;
203 rdlnk.a_vp = ap->a_vp;
204 rdlnk.a_cred = ap->a_cred;
205 if (cd9660_readlink(&rdlnk) == 0)
206 vap->va_size = MAXPATHLEN - auio.uio_resid;
207 free(cp, M_TEMP);
208 }
209 vap->va_flags = 0;
210 vap->va_gen = 1;
211 vap->va_blocksize = ip->i_mnt->logical_block_size;
212 vap->va_bytes = (u_quad_t) ip->i_size;
213 vap->va_type = vp->v_type;
214 vap->va_filerev = 0;
215 return (0);
216 }
217
218 /*
219 * Vnode op for ioctl.
220 */
221 static int
222 cd9660_ioctl(struct vop_ioctl_args *ap)
223 {
224 struct vnode *vp;
225 struct iso_node *ip;
226 int error;
227
228 vp = ap->a_vp;
229 vn_lock(vp, LK_SHARED | LK_RETRY);
230 if (VN_IS_DOOMED(vp)) {
231 VOP_UNLOCK(vp);
232 return (EBADF);
233 }
234 if (vp->v_type == VCHR || vp->v_type == VBLK) {
235 VOP_UNLOCK(vp);
236 return (EOPNOTSUPP);
237 }
238
239 ip = VTOI(vp);
240 error = 0;
241
242 switch (ap->a_command) {
243 case FIOGETLBA:
244 *(int *)(ap->a_data) = ip->iso_start;
245 break;
246 default:
247 error = ENOTTY;
248 break;
249 }
250
251 VOP_UNLOCK(vp);
252 return (error);
253 }
254
255 /*
256 * Vnode op for reading.
257 */
258 static int
259 cd9660_read(struct vop_read_args *ap)
260 {
261 struct vnode *vp = ap->a_vp;
262 struct uio *uio = ap->a_uio;
263 struct iso_node *ip = VTOI(vp);
264 struct iso_mnt *imp;
265 struct buf *bp;
266 daddr_t lbn, rablock;
267 off_t diff;
268 int rasize, error = 0;
269 int seqcount;
270 long size, n, on;
271
272 if (vp->v_type == VCHR || vp->v_type == VBLK)
273 return (EOPNOTSUPP);
274
275 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
276
277 if (uio->uio_resid == 0)
278 return (0);
279 if (uio->uio_offset < 0)
280 return (EINVAL);
281 imp = ip->i_mnt;
282 do {
283 lbn = lblkno(imp, uio->uio_offset);
284 on = blkoff(imp, uio->uio_offset);
285 n = MIN(imp->logical_block_size - on, uio->uio_resid);
286 diff = (off_t)ip->i_size - uio->uio_offset;
287 if (diff <= 0)
288 return (0);
289 if (diff < n)
290 n = diff;
291 size = blksize(imp, ip, lbn);
292 rablock = lbn + 1;
293 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
294 if (lblktosize(imp, rablock) < ip->i_size)
295 error = cluster_read(vp, (off_t)ip->i_size,
296 lbn, size, NOCRED, uio->uio_resid,
297 (ap->a_ioflag >> 16), 0, &bp);
298 else
299 error = bread(vp, lbn, size, NOCRED, &bp);
300 } else {
301 if (seqcount > 1 &&
302 lblktosize(imp, rablock) < ip->i_size) {
303 rasize = blksize(imp, ip, rablock);
304 error = breadn(vp, lbn, size, &rablock,
305 &rasize, 1, NOCRED, &bp);
306 } else
307 error = bread(vp, lbn, size, NOCRED, &bp);
308 }
309 if (error != 0)
310 return (error);
311 n = MIN(n, size - bp->b_resid);
312
313 error = uiomove(bp->b_data + on, (int)n, uio);
314 brelse(bp);
315 } while (error == 0 && uio->uio_resid > 0 && n != 0);
316 return (error);
317 }
318
319 /*
320 * Structure for reading directories
321 */
322 struct isoreaddir {
323 struct dirent saveent;
324 struct dirent assocent;
325 struct dirent current;
326 off_t saveoff;
327 off_t assocoff;
328 off_t curroff;
329 struct uio *uio;
330 off_t uio_off;
331 int eofflag;
332 uint64_t *cookies;
333 int ncookies;
334 };
335
336 static int
337 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
338 {
339 int error;
340
341 dp->d_reclen = GENERIC_DIRSIZ(dp);
342 dirent_terminate(dp);
343
344 if (idp->uio->uio_resid < dp->d_reclen) {
345 idp->eofflag = 0;
346 return (-1);
347 }
348
349 if (idp->cookies) {
350 if (idp->ncookies <= 0) {
351 idp->eofflag = 0;
352 return (-1);
353 }
354
355 *idp->cookies++ = off;
356 --idp->ncookies;
357 }
358
359 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
360 return (error);
361 idp->uio_off = off;
362 return (0);
363 }
364
365 static int
366 iso_shipdir(struct isoreaddir *idp)
367 {
368 struct dirent *dp;
369 int cl, sl, assoc;
370 int error;
371 char *cname, *sname;
372
373 cl = idp->current.d_namlen;
374 cname = idp->current.d_name;
375 assoc = (cl > 1) && (*cname == ASSOCCHAR);
376 if (assoc) {
377 cl--;
378 cname++;
379 }
380
381 dp = &idp->saveent;
382 sname = dp->d_name;
383 if (!(sl = dp->d_namlen)) {
384 dp = &idp->assocent;
385 sname = dp->d_name + 1;
386 sl = dp->d_namlen - 1;
387 }
388 if (sl > 0) {
389 if (sl != cl
390 || bcmp(sname,cname,sl)) {
391 if (idp->assocent.d_namlen) {
392 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
393 return (error);
394 idp->assocent.d_namlen = 0;
395 }
396 if (idp->saveent.d_namlen) {
397 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
398 return (error);
399 idp->saveent.d_namlen = 0;
400 }
401 }
402 }
403 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
404 if (assoc) {
405 idp->assocoff = idp->curroff;
406 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen);
407 } else {
408 idp->saveoff = idp->curroff;
409 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen);
410 }
411 return (0);
412 }
413
414 /*
415 * Vnode op for readdir
416 */
417 static int
418 cd9660_readdir(struct vop_readdir_args *ap)
419 {
420 struct uio *uio = ap->a_uio;
421 struct isoreaddir *idp;
422 struct vnode *vdp = ap->a_vp;
423 struct iso_node *dp;
424 struct iso_mnt *imp;
425 struct buf *bp = NULL;
426 struct iso_directory_record *ep;
427 int entryoffsetinblock;
428 doff_t endsearch;
429 u_long bmask;
430 int error = 0;
431 int reclen;
432 u_short namelen;
433 u_int ncookies = 0;
434 uint64_t *cookies = NULL;
435 cd_ino_t ino;
436
437 dp = VTOI(vdp);
438 imp = dp->i_mnt;
439 bmask = imp->im_bmask;
440
441 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
442 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
443 /*
444 * XXX
445 * Is it worth trying to figure out the type?
446 */
447 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
448 DT_UNKNOWN;
449 idp->uio = uio;
450 if (ap->a_ncookies == NULL) {
451 idp->cookies = NULL;
452 } else {
453 /*
454 * Guess the number of cookies needed.
455 */
456 ncookies = uio->uio_resid / 16;
457 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
458 idp->cookies = cookies;
459 idp->ncookies = ncookies;
460 }
461 idp->eofflag = 1;
462 idp->curroff = uio->uio_offset;
463 idp->uio_off = uio->uio_offset;
464
465 if ((entryoffsetinblock = idp->curroff & bmask) &&
466 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
467 free(idp, M_TEMP);
468 return (error);
469 }
470 endsearch = dp->i_size;
471
472 while (idp->curroff < endsearch) {
473 /*
474 * If offset is on a block boundary,
475 * read the next directory block.
476 * Release previous if it exists.
477 */
478 if ((idp->curroff & bmask) == 0) {
479 if (bp != NULL)
480 brelse(bp);
481 if ((error =
482 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
483 break;
484 entryoffsetinblock = 0;
485 }
486 /*
487 * Get pointer to next entry.
488 */
489 ep = (struct iso_directory_record *)
490 ((char *)bp->b_data + entryoffsetinblock);
491
492 reclen = isonum_711(ep->length);
493 if (reclen == 0) {
494 /* skip to next block, if any */
495 idp->curroff =
496 (idp->curroff & ~bmask) + imp->logical_block_size;
497 continue;
498 }
499
500 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
501 error = EINVAL;
502 /* illegal entry, stop */
503 break;
504 }
505
506 if (entryoffsetinblock + reclen > imp->logical_block_size) {
507 error = EINVAL;
508 /* illegal directory, so stop looking */
509 break;
510 }
511
512 idp->current.d_namlen = isonum_711(ep->name_len);
513
514 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
515 error = EINVAL;
516 /* illegal entry, stop */
517 break;
518 }
519
520 if (isonum_711(ep->flags)&2)
521 idp->current.d_fileno = isodirino(ep, imp);
522 else
523 idp->current.d_fileno = dbtob(bp->b_blkno) +
524 entryoffsetinblock;
525
526 idp->curroff += reclen;
527 /* NOTE: d_off is the offset of *next* entry. */
528 idp->current.d_off = idp->curroff;
529
530 switch (imp->iso_ftype) {
531 case ISO_FTYPE_RRIP:
532 ino = idp->current.d_fileno;
533 cd9660_rrip_getname(ep, idp->current.d_name, &namelen,
534 &ino, imp);
535 idp->current.d_fileno = ino;
536 idp->current.d_namlen = (u_char)namelen;
537 if (idp->current.d_namlen)
538 error = iso_uiodir(idp,&idp->current,idp->curroff);
539 break;
540 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
541 strcpy(idp->current.d_name,"..");
542 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
543 idp->current.d_namlen = 1;
544 error = iso_uiodir(idp,&idp->current,idp->curroff);
545 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
546 idp->current.d_namlen = 2;
547 error = iso_uiodir(idp,&idp->current,idp->curroff);
548 } else {
549 isofntrans(ep->name,idp->current.d_namlen,
550 idp->current.d_name, &namelen,
551 imp->iso_ftype == ISO_FTYPE_9660,
552 isonum_711(ep->flags)&4,
553 imp->joliet_level,
554 imp->im_flags,
555 imp->im_d2l);
556 idp->current.d_namlen = (u_char)namelen;
557 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
558 error = iso_shipdir(idp);
559 else
560 error = iso_uiodir(idp,&idp->current,idp->curroff);
561 }
562 }
563 if (error)
564 break;
565
566 entryoffsetinblock += reclen;
567 }
568
569 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
570 idp->current.d_namlen = 0;
571 error = iso_shipdir(idp);
572 }
573 if (error < 0)
574 error = 0;
575
576 if (ap->a_ncookies != NULL) {
577 if (error)
578 free(cookies, M_TEMP);
579 else {
580 /*
581 * Work out the number of cookies actually used.
582 */
583 *ap->a_ncookies = ncookies - idp->ncookies;
584 *ap->a_cookies = cookies;
585 }
586 }
587
588 if (bp)
589 brelse (bp);
590
591 uio->uio_offset = idp->uio_off;
592 *ap->a_eofflag = idp->eofflag;
593
594 free(idp, M_TEMP);
595
596 return (error);
597 }
598
599 /*
600 * Return target name of a symbolic link
601 * Shouldn't we get the parent vnode and read the data from there?
602 * This could eventually result in deadlocks in cd9660_lookup.
603 * But otherwise the block read here is in the block buffer two times.
604 */
605 typedef struct iso_directory_record ISODIR;
606 typedef struct iso_node ISONODE;
607 typedef struct iso_mnt ISOMNT;
608 static int
609 cd9660_readlink(struct vop_readlink_args *ap)
610 {
611 ISONODE *ip;
612 ISODIR *dirp;
613 ISOMNT *imp;
614 struct buf *bp;
615 struct uio *uio;
616 u_short symlen;
617 int error;
618 char *symname;
619
620 ip = VTOI(ap->a_vp);
621 imp = ip->i_mnt;
622 uio = ap->a_uio;
623
624 if (imp->iso_ftype != ISO_FTYPE_RRIP)
625 return (EINVAL);
626
627 /*
628 * Get parents directory record block that this inode included.
629 */
630 error = bread(imp->im_devvp,
631 (ip->i_number >> imp->im_bshift) <<
632 (imp->im_bshift - DEV_BSHIFT),
633 imp->logical_block_size, NOCRED, &bp);
634 if (error) {
635 return (EINVAL);
636 }
637
638 /*
639 * Setup the directory pointer for this inode
640 */
641 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
642
643 /*
644 * Just make sure, we have a right one....
645 * 1: Check not cross boundary on block
646 */
647 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
648 > (unsigned)imp->logical_block_size) {
649 brelse(bp);
650 return (EINVAL);
651 }
652
653 /*
654 * Now get a buffer
655 * Abuse a namei buffer for now.
656 */
657 if (uio->uio_segflg == UIO_SYSSPACE)
658 symname = uio->uio_iov->iov_base;
659 else
660 symname = uma_zalloc(namei_zone, M_WAITOK);
661
662 /*
663 * Ok, we just gathering a symbolic name in SL record.
664 */
665 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
666 if (uio->uio_segflg != UIO_SYSSPACE)
667 uma_zfree(namei_zone, symname);
668 brelse(bp);
669 return (EINVAL);
670 }
671 /*
672 * Don't forget before you leave from home ;-)
673 */
674 brelse(bp);
675
676 /*
677 * return with the symbolic name to caller's.
678 */
679 if (uio->uio_segflg != UIO_SYSSPACE) {
680 error = uiomove(symname, symlen, uio);
681 uma_zfree(namei_zone, symname);
682 return (error);
683 }
684 uio->uio_resid -= symlen;
685 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
686 uio->uio_iov->iov_len -= symlen;
687 return (0);
688 }
689
690 /*
691 * Calculate the logical to physical mapping if not done already,
692 * then call the device strategy routine.
693 */
694 static int
695 cd9660_strategy(struct vop_strategy_args *ap)
696 {
697 struct buf *bp = ap->a_bp;
698 struct vnode *vp = ap->a_vp;
699 struct iso_node *ip;
700 struct bufobj *bo;
701
702 ip = VTOI(vp);
703 if (vp->v_type == VBLK || vp->v_type == VCHR)
704 panic("cd9660_strategy: spec");
705 if (bp->b_blkno == bp->b_lblkno) {
706 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
707 (ip->i_mnt->im_bshift - DEV_BSHIFT);
708 }
709 bp->b_iooffset = dbtob(bp->b_blkno);
710 bo = ip->i_mnt->im_bo;
711 BO_STRATEGY(bo, bp);
712 return (0);
713 }
714
715 /*
716 * Return POSIX pathconf information applicable to cd9660 filesystems.
717 */
718 static int
719 cd9660_pathconf(struct vop_pathconf_args *ap)
720 {
721
722 switch (ap->a_name) {
723 case _PC_FILESIZEBITS:
724 *ap->a_retval = 32;
725 return (0);
726 case _PC_LINK_MAX:
727 *ap->a_retval = 1;
728 return (0);
729 case _PC_NAME_MAX:
730 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
731 *ap->a_retval = NAME_MAX;
732 else
733 *ap->a_retval = 37;
734 return (0);
735 case _PC_SYMLINK_MAX:
736 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) {
737 *ap->a_retval = MAXPATHLEN;
738 return (0);
739 }
740 return (EINVAL);
741 case _PC_NO_TRUNC:
742 *ap->a_retval = 1;
743 return (0);
744 default:
745 return (vop_stdpathconf(ap));
746 }
747 /* NOTREACHED */
748 }
749
750 /*
751 * Vnode pointer to File handle
752 */
753 static int
754 cd9660_vptofh(struct vop_vptofh_args *ap)
755 {
756 struct ifid ifh;
757 struct iso_node *ip = VTOI(ap->a_vp);
758
759 ifh.ifid_len = sizeof(struct ifid);
760
761 ifh.ifid_ino = ip->i_number;
762 ifh.ifid_start = ip->iso_start;
763 /*
764 * This intentionally uses sizeof(ifh) in order to not copy stack
765 * garbage on ILP32.
766 */
767 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
768
769 #ifdef ISOFS_DBG
770 printf("vptofh: ino %jd, start %ld\n",
771 (uintmax_t)ifh.ifid_ino, ifh.ifid_start);
772 #endif
773
774 return (0);
775 }
776
777 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
778 "cd9660 filesystem");
779 static int use_buf_pager = 1;
780 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN,
781 &use_buf_pager, 0,
782 "Use buffer pager instead of bmap");
783
784 static daddr_t
785 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
786 {
787
788 return (lblkno(VTOI(vp)->i_mnt, off));
789 }
790
791 static int
792 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz)
793 {
794 struct iso_node *ip;
795
796 ip = VTOI(vp);
797 *sz = blksize(ip->i_mnt, ip, lbn);
798 return (0);
799 }
800
801 static int
802 cd9660_getpages(struct vop_getpages_args *ap)
803 {
804 struct vnode *vp;
805
806 vp = ap->a_vp;
807 if (vp->v_type == VCHR || vp->v_type == VBLK)
808 return (EOPNOTSUPP);
809
810 if (use_buf_pager)
811 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count,
812 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno,
813 cd9660_gbp_getblksz));
814 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
815 ap->a_rbehind, ap->a_rahead, NULL, NULL));
816 }
817
818 /*
819 * Global vfs data structures for cd9660
820 */
821 struct vop_vector cd9660_vnodeops = {
822 .vop_default = &default_vnodeops,
823 .vop_open = cd9660_open,
824 .vop_access = cd9660_access,
825 .vop_bmap = cd9660_bmap,
826 .vop_cachedlookup = cd9660_lookup,
827 .vop_getattr = cd9660_getattr,
828 .vop_inactive = cd9660_inactive,
829 .vop_ioctl = cd9660_ioctl,
830 .vop_lookup = vfs_cache_lookup,
831 .vop_pathconf = cd9660_pathconf,
832 .vop_read = cd9660_read,
833 .vop_readdir = cd9660_readdir,
834 .vop_readlink = cd9660_readlink,
835 .vop_reclaim = cd9660_reclaim,
836 .vop_setattr = cd9660_setattr,
837 .vop_strategy = cd9660_strategy,
838 .vop_vptofh = cd9660_vptofh,
839 .vop_getpages = cd9660_getpages,
840 };
841 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops);
842
843 /*
844 * Special device vnode ops
845 */
846
847 struct vop_vector cd9660_fifoops = {
848 .vop_default = &fifo_specops,
849 .vop_access = cd9660_access,
850 .vop_getattr = cd9660_getattr,
851 .vop_inactive = cd9660_inactive,
852 .vop_reclaim = cd9660_reclaim,
853 .vop_setattr = cd9660_setattr,
854 .vop_vptofh = cd9660_vptofh,
855 };
856 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops);
Cache object: 31c6c0338b2f5659232e4813a81251f7
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