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(ap)
87 struct vop_setattr_args /* {
88 struct vnodeop_desc *a_desc;
89 struct vnode *a_vp;
90 struct vattr *a_vap;
91 struct ucred *a_cred;
92 } */ *ap;
93 {
94 struct vnode *vp = ap->a_vp;
95 struct vattr *vap = ap->a_vap;
96
97 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
98 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
99 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
100 return (EROFS);
101 if (vap->va_size != (u_quad_t)VNOVAL) {
102 switch (vp->v_type) {
103 case VDIR:
104 return (EISDIR);
105 case VLNK:
106 case VREG:
107 return (EROFS);
108 case VCHR:
109 case VBLK:
110 case VSOCK:
111 case VFIFO:
112 case VNON:
113 case VBAD:
114 case VMARKER:
115 return (0);
116 }
117 }
118 return (0);
119 }
120
121 /*
122 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
123 * The mode is shifted to select the owner/group/other fields. The
124 * super user is granted all permissions.
125 */
126 /* ARGSUSED */
127 static int
128 cd9660_access(ap)
129 struct vop_access_args /* {
130 struct vnode *a_vp;
131 accmode_t a_accmode;
132 struct ucred *a_cred;
133 struct thread *a_td;
134 } */ *ap;
135 {
136 struct vnode *vp = ap->a_vp;
137 struct iso_node *ip = VTOI(vp);
138 accmode_t accmode = ap->a_accmode;
139
140 if (vp->v_type == VCHR || vp->v_type == VBLK)
141 return (EOPNOTSUPP);
142
143 /*
144 * Disallow write attempts unless the file is a socket,
145 * fifo, or a block or character device resident on the
146 * filesystem.
147 */
148 if (accmode & VWRITE) {
149 switch (vp->v_type) {
150 case VDIR:
151 case VLNK:
152 case VREG:
153 return (EROFS);
154 /* NOT REACHED */
155 default:
156 break;
157 }
158 }
159
160 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
161 ip->inode.iso_gid, ap->a_accmode, ap->a_cred));
162 }
163
164 static int
165 cd9660_open(ap)
166 struct vop_open_args /* {
167 struct vnode *a_vp;
168 int a_mode;
169 struct ucred *a_cred;
170 struct thread *a_td;
171 struct file *a_fp;
172 } */ *ap;
173 {
174 struct vnode *vp = ap->a_vp;
175 struct iso_node *ip = VTOI(vp);
176
177 if (vp->v_type == VCHR || vp->v_type == VBLK)
178 return (EOPNOTSUPP);
179
180 vnode_create_vobject(vp, ip->i_size, ap->a_td);
181 return (0);
182 }
183
184 static int
185 cd9660_getattr(ap)
186 struct vop_getattr_args /* {
187 struct vnode *a_vp;
188 struct vattr *a_vap;
189 struct ucred *a_cred;
190 } */ *ap;
191
192 {
193 struct vnode *vp = ap->a_vp;
194 struct vattr *vap = ap->a_vap;
195 struct iso_node *ip = VTOI(vp);
196
197 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
198 vap->va_fileid = ip->i_number;
199
200 vap->va_mode = ip->inode.iso_mode;
201 vap->va_nlink = ip->inode.iso_links;
202 vap->va_uid = ip->inode.iso_uid;
203 vap->va_gid = ip->inode.iso_gid;
204 vap->va_atime = ip->inode.iso_atime;
205 vap->va_mtime = ip->inode.iso_mtime;
206 vap->va_ctime = ip->inode.iso_ctime;
207 vap->va_rdev = ip->inode.iso_rdev;
208
209 vap->va_size = (u_quad_t) ip->i_size;
210 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
211 struct vop_readlink_args rdlnk;
212 struct iovec aiov;
213 struct uio auio;
214 char *cp;
215
216 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
217 aiov.iov_base = cp;
218 aiov.iov_len = MAXPATHLEN;
219 auio.uio_iov = &aiov;
220 auio.uio_iovcnt = 1;
221 auio.uio_offset = 0;
222 auio.uio_rw = UIO_READ;
223 auio.uio_segflg = UIO_SYSSPACE;
224 auio.uio_td = curthread;
225 auio.uio_resid = MAXPATHLEN;
226 rdlnk.a_uio = &auio;
227 rdlnk.a_vp = ap->a_vp;
228 rdlnk.a_cred = ap->a_cred;
229 if (cd9660_readlink(&rdlnk) == 0)
230 vap->va_size = MAXPATHLEN - auio.uio_resid;
231 free(cp, M_TEMP);
232 }
233 vap->va_flags = 0;
234 vap->va_gen = 1;
235 vap->va_blocksize = ip->i_mnt->logical_block_size;
236 vap->va_bytes = (u_quad_t) ip->i_size;
237 vap->va_type = vp->v_type;
238 vap->va_filerev = 0;
239 return (0);
240 }
241
242 /*
243 * Vnode op for ioctl.
244 */
245 static int
246 cd9660_ioctl(ap)
247 struct vop_ioctl_args /* {
248 struct vnode *a_vp;
249 u_long a_command;
250 caddr_t a_data;
251 int a_fflag;
252 struct ucred *a_cred;
253 struct thread *a_td;
254 } */ *ap;
255 {
256 struct vnode *vp;
257 struct iso_node *ip;
258 int error;
259
260 vp = ap->a_vp;
261 vn_lock(vp, LK_SHARED | LK_RETRY);
262 if (VN_IS_DOOMED(vp)) {
263 VOP_UNLOCK(vp);
264 return (EBADF);
265 }
266 if (vp->v_type == VCHR || vp->v_type == VBLK) {
267 VOP_UNLOCK(vp);
268 return (EOPNOTSUPP);
269 }
270
271 ip = VTOI(vp);
272 error = 0;
273
274 switch (ap->a_command) {
275 case FIOGETLBA:
276 *(int *)(ap->a_data) = ip->iso_start;
277 break;
278 default:
279 error = ENOTTY;
280 break;
281 }
282
283 VOP_UNLOCK(vp);
284 return (error);
285 }
286
287 /*
288 * Vnode op for reading.
289 */
290 static int
291 cd9660_read(ap)
292 struct vop_read_args /* {
293 struct vnode *a_vp;
294 struct uio *a_uio;
295 int a_ioflag;
296 struct ucred *a_cred;
297 } */ *ap;
298 {
299 struct vnode *vp = ap->a_vp;
300 struct uio *uio = ap->a_uio;
301 struct iso_node *ip = VTOI(vp);
302 struct iso_mnt *imp;
303 struct buf *bp;
304 daddr_t lbn, rablock;
305 off_t diff;
306 int rasize, error = 0;
307 int seqcount;
308 long size, n, on;
309
310 if (vp->v_type == VCHR || vp->v_type == VBLK)
311 return (EOPNOTSUPP);
312
313 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
314
315 if (uio->uio_resid == 0)
316 return (0);
317 if (uio->uio_offset < 0)
318 return (EINVAL);
319 imp = ip->i_mnt;
320 do {
321 lbn = lblkno(imp, uio->uio_offset);
322 on = blkoff(imp, uio->uio_offset);
323 n = MIN(imp->logical_block_size - on, uio->uio_resid);
324 diff = (off_t)ip->i_size - uio->uio_offset;
325 if (diff <= 0)
326 return (0);
327 if (diff < n)
328 n = diff;
329 size = blksize(imp, ip, lbn);
330 rablock = lbn + 1;
331 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
332 if (lblktosize(imp, rablock) < ip->i_size)
333 error = cluster_read(vp, (off_t)ip->i_size,
334 lbn, size, NOCRED, uio->uio_resid,
335 (ap->a_ioflag >> 16), 0, &bp);
336 else
337 error = bread(vp, lbn, size, NOCRED, &bp);
338 } else {
339 if (seqcount > 1 &&
340 lblktosize(imp, rablock) < ip->i_size) {
341 rasize = blksize(imp, ip, rablock);
342 error = breadn(vp, lbn, size, &rablock,
343 &rasize, 1, NOCRED, &bp);
344 } else
345 error = bread(vp, lbn, size, NOCRED, &bp);
346 }
347 if (error != 0)
348 return (error);
349 n = MIN(n, size - bp->b_resid);
350
351 error = uiomove(bp->b_data + on, (int)n, uio);
352 brelse(bp);
353 } while (error == 0 && uio->uio_resid > 0 && n != 0);
354 return (error);
355 }
356
357 /*
358 * Structure for reading directories
359 */
360 struct isoreaddir {
361 struct dirent saveent;
362 struct dirent assocent;
363 struct dirent current;
364 off_t saveoff;
365 off_t assocoff;
366 off_t curroff;
367 struct uio *uio;
368 off_t uio_off;
369 int eofflag;
370 u_long *cookies;
371 int ncookies;
372 };
373
374 static int
375 iso_uiodir(idp,dp,off)
376 struct isoreaddir *idp;
377 struct dirent *dp;
378 off_t off;
379 {
380 int error;
381
382 dp->d_reclen = GENERIC_DIRSIZ(dp);
383 dirent_terminate(dp);
384
385 if (idp->uio->uio_resid < dp->d_reclen) {
386 idp->eofflag = 0;
387 return (-1);
388 }
389
390 if (idp->cookies) {
391 if (idp->ncookies <= 0) {
392 idp->eofflag = 0;
393 return (-1);
394 }
395
396 *idp->cookies++ = off;
397 --idp->ncookies;
398 }
399
400 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
401 return (error);
402 idp->uio_off = off;
403 return (0);
404 }
405
406 static int
407 iso_shipdir(idp)
408 struct isoreaddir *idp;
409 {
410 struct dirent *dp;
411 int cl, sl, assoc;
412 int error;
413 char *cname, *sname;
414
415 cl = idp->current.d_namlen;
416 cname = idp->current.d_name;
417 assoc = (cl > 1) && (*cname == ASSOCCHAR);
418 if (assoc) {
419 cl--;
420 cname++;
421 }
422
423 dp = &idp->saveent;
424 sname = dp->d_name;
425 if (!(sl = dp->d_namlen)) {
426 dp = &idp->assocent;
427 sname = dp->d_name + 1;
428 sl = dp->d_namlen - 1;
429 }
430 if (sl > 0) {
431 if (sl != cl
432 || bcmp(sname,cname,sl)) {
433 if (idp->assocent.d_namlen) {
434 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
435 return (error);
436 idp->assocent.d_namlen = 0;
437 }
438 if (idp->saveent.d_namlen) {
439 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
440 return (error);
441 idp->saveent.d_namlen = 0;
442 }
443 }
444 }
445 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
446 if (assoc) {
447 idp->assocoff = idp->curroff;
448 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen);
449 } else {
450 idp->saveoff = idp->curroff;
451 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen);
452 }
453 return (0);
454 }
455
456 /*
457 * Vnode op for readdir
458 */
459 static int
460 cd9660_readdir(ap)
461 struct vop_readdir_args /* {
462 struct vnode *a_vp;
463 struct uio *a_uio;
464 struct ucred *a_cred;
465 int *a_eofflag;
466 int *a_ncookies;
467 u_long **a_cookies;
468 } */ *ap;
469 {
470 struct uio *uio = ap->a_uio;
471 struct isoreaddir *idp;
472 struct vnode *vdp = ap->a_vp;
473 struct iso_node *dp;
474 struct iso_mnt *imp;
475 struct buf *bp = NULL;
476 struct iso_directory_record *ep;
477 int entryoffsetinblock;
478 doff_t endsearch;
479 u_long bmask;
480 int error = 0;
481 int reclen;
482 u_short namelen;
483 u_int ncookies = 0;
484 u_long *cookies = NULL;
485 cd_ino_t ino;
486
487 dp = VTOI(vdp);
488 imp = dp->i_mnt;
489 bmask = imp->im_bmask;
490
491 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
492 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
493 /*
494 * XXX
495 * Is it worth trying to figure out the type?
496 */
497 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
498 DT_UNKNOWN;
499 idp->uio = uio;
500 if (ap->a_ncookies == NULL) {
501 idp->cookies = NULL;
502 } else {
503 /*
504 * Guess the number of cookies needed.
505 */
506 ncookies = uio->uio_resid / 16;
507 cookies = malloc(ncookies * sizeof(u_long),
508 M_TEMP, M_WAITOK);
509 idp->cookies = cookies;
510 idp->ncookies = ncookies;
511 }
512 idp->eofflag = 1;
513 idp->curroff = uio->uio_offset;
514 idp->uio_off = uio->uio_offset;
515
516 if ((entryoffsetinblock = idp->curroff & bmask) &&
517 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
518 free(idp, M_TEMP);
519 return (error);
520 }
521 endsearch = dp->i_size;
522
523 while (idp->curroff < endsearch) {
524 /*
525 * If offset is on a block boundary,
526 * read the next directory block.
527 * Release previous if it exists.
528 */
529 if ((idp->curroff & bmask) == 0) {
530 if (bp != NULL)
531 brelse(bp);
532 if ((error =
533 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
534 break;
535 entryoffsetinblock = 0;
536 }
537 /*
538 * Get pointer to next entry.
539 */
540 ep = (struct iso_directory_record *)
541 ((char *)bp->b_data + entryoffsetinblock);
542
543 reclen = isonum_711(ep->length);
544 if (reclen == 0) {
545 /* skip to next block, if any */
546 idp->curroff =
547 (idp->curroff & ~bmask) + imp->logical_block_size;
548 continue;
549 }
550
551 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
552 error = EINVAL;
553 /* illegal entry, stop */
554 break;
555 }
556
557 if (entryoffsetinblock + reclen > imp->logical_block_size) {
558 error = EINVAL;
559 /* illegal directory, so stop looking */
560 break;
561 }
562
563 idp->current.d_namlen = isonum_711(ep->name_len);
564
565 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
566 error = EINVAL;
567 /* illegal entry, stop */
568 break;
569 }
570
571 if (isonum_711(ep->flags)&2)
572 idp->current.d_fileno = isodirino(ep, imp);
573 else
574 idp->current.d_fileno = dbtob(bp->b_blkno) +
575 entryoffsetinblock;
576
577 idp->curroff += reclen;
578 /* NOTE: d_off is the offset of *next* entry. */
579 idp->current.d_off = idp->curroff;
580
581 switch (imp->iso_ftype) {
582 case ISO_FTYPE_RRIP:
583 ino = idp->current.d_fileno;
584 cd9660_rrip_getname(ep, idp->current.d_name, &namelen,
585 &ino, imp);
586 idp->current.d_fileno = ino;
587 idp->current.d_namlen = (u_char)namelen;
588 if (idp->current.d_namlen)
589 error = iso_uiodir(idp,&idp->current,idp->curroff);
590 break;
591 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
592 strcpy(idp->current.d_name,"..");
593 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
594 idp->current.d_namlen = 1;
595 error = iso_uiodir(idp,&idp->current,idp->curroff);
596 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
597 idp->current.d_namlen = 2;
598 error = iso_uiodir(idp,&idp->current,idp->curroff);
599 } else {
600 isofntrans(ep->name,idp->current.d_namlen,
601 idp->current.d_name, &namelen,
602 imp->iso_ftype == ISO_FTYPE_9660,
603 isonum_711(ep->flags)&4,
604 imp->joliet_level,
605 imp->im_flags,
606 imp->im_d2l);
607 idp->current.d_namlen = (u_char)namelen;
608 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
609 error = iso_shipdir(idp);
610 else
611 error = iso_uiodir(idp,&idp->current,idp->curroff);
612 }
613 }
614 if (error)
615 break;
616
617 entryoffsetinblock += reclen;
618 }
619
620 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
621 idp->current.d_namlen = 0;
622 error = iso_shipdir(idp);
623 }
624 if (error < 0)
625 error = 0;
626
627 if (ap->a_ncookies != NULL) {
628 if (error)
629 free(cookies, M_TEMP);
630 else {
631 /*
632 * Work out the number of cookies actually used.
633 */
634 *ap->a_ncookies = ncookies - idp->ncookies;
635 *ap->a_cookies = cookies;
636 }
637 }
638
639 if (bp)
640 brelse (bp);
641
642 uio->uio_offset = idp->uio_off;
643 *ap->a_eofflag = idp->eofflag;
644
645 free(idp, M_TEMP);
646
647 return (error);
648 }
649
650 /*
651 * Return target name of a symbolic link
652 * Shouldn't we get the parent vnode and read the data from there?
653 * This could eventually result in deadlocks in cd9660_lookup.
654 * But otherwise the block read here is in the block buffer two times.
655 */
656 typedef struct iso_directory_record ISODIR;
657 typedef struct iso_node ISONODE;
658 typedef struct iso_mnt ISOMNT;
659 static int
660 cd9660_readlink(ap)
661 struct vop_readlink_args /* {
662 struct vnode *a_vp;
663 struct uio *a_uio;
664 struct ucred *a_cred;
665 } */ *ap;
666 {
667 ISONODE *ip;
668 ISODIR *dirp;
669 ISOMNT *imp;
670 struct buf *bp;
671 struct uio *uio;
672 u_short symlen;
673 int error;
674 char *symname;
675
676 ip = VTOI(ap->a_vp);
677 imp = ip->i_mnt;
678 uio = ap->a_uio;
679
680 if (imp->iso_ftype != ISO_FTYPE_RRIP)
681 return (EINVAL);
682
683 /*
684 * Get parents directory record block that this inode included.
685 */
686 error = bread(imp->im_devvp,
687 (ip->i_number >> imp->im_bshift) <<
688 (imp->im_bshift - DEV_BSHIFT),
689 imp->logical_block_size, NOCRED, &bp);
690 if (error) {
691 return (EINVAL);
692 }
693
694 /*
695 * Setup the directory pointer for this inode
696 */
697 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
698
699 /*
700 * Just make sure, we have a right one....
701 * 1: Check not cross boundary on block
702 */
703 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
704 > (unsigned)imp->logical_block_size) {
705 brelse(bp);
706 return (EINVAL);
707 }
708
709 /*
710 * Now get a buffer
711 * Abuse a namei buffer for now.
712 */
713 if (uio->uio_segflg == UIO_SYSSPACE)
714 symname = uio->uio_iov->iov_base;
715 else
716 symname = uma_zalloc(namei_zone, M_WAITOK);
717
718 /*
719 * Ok, we just gathering a symbolic name in SL record.
720 */
721 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
722 if (uio->uio_segflg != UIO_SYSSPACE)
723 uma_zfree(namei_zone, symname);
724 brelse(bp);
725 return (EINVAL);
726 }
727 /*
728 * Don't forget before you leave from home ;-)
729 */
730 brelse(bp);
731
732 /*
733 * return with the symbolic name to caller's.
734 */
735 if (uio->uio_segflg != UIO_SYSSPACE) {
736 error = uiomove(symname, symlen, uio);
737 uma_zfree(namei_zone, symname);
738 return (error);
739 }
740 uio->uio_resid -= symlen;
741 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
742 uio->uio_iov->iov_len -= symlen;
743 return (0);
744 }
745
746 /*
747 * Calculate the logical to physical mapping if not done already,
748 * then call the device strategy routine.
749 */
750 static int
751 cd9660_strategy(ap)
752 struct vop_strategy_args /* {
753 struct buf *a_vp;
754 struct buf *a_bp;
755 } */ *ap;
756 {
757 struct buf *bp = ap->a_bp;
758 struct vnode *vp = ap->a_vp;
759 struct iso_node *ip;
760 struct bufobj *bo;
761
762 ip = VTOI(vp);
763 if (vp->v_type == VBLK || vp->v_type == VCHR)
764 panic("cd9660_strategy: spec");
765 if (bp->b_blkno == bp->b_lblkno) {
766 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
767 (ip->i_mnt->im_bshift - DEV_BSHIFT);
768 }
769 bp->b_iooffset = dbtob(bp->b_blkno);
770 bo = ip->i_mnt->im_bo;
771 BO_STRATEGY(bo, bp);
772 return (0);
773 }
774
775 /*
776 * Return POSIX pathconf information applicable to cd9660 filesystems.
777 */
778 static int
779 cd9660_pathconf(ap)
780 struct vop_pathconf_args /* {
781 struct vnode *a_vp;
782 int a_name;
783 register_t *a_retval;
784 } */ *ap;
785 {
786
787 switch (ap->a_name) {
788 case _PC_FILESIZEBITS:
789 *ap->a_retval = 32;
790 return (0);
791 case _PC_LINK_MAX:
792 *ap->a_retval = 1;
793 return (0);
794 case _PC_NAME_MAX:
795 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
796 *ap->a_retval = NAME_MAX;
797 else
798 *ap->a_retval = 37;
799 return (0);
800 case _PC_SYMLINK_MAX:
801 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) {
802 *ap->a_retval = MAXPATHLEN;
803 return (0);
804 }
805 return (EINVAL);
806 case _PC_NO_TRUNC:
807 *ap->a_retval = 1;
808 return (0);
809 default:
810 return (vop_stdpathconf(ap));
811 }
812 /* NOTREACHED */
813 }
814
815 /*
816 * Vnode pointer to File handle
817 */
818 static int
819 cd9660_vptofh(ap)
820 struct vop_vptofh_args /* {
821 struct vnode *a_vp;
822 struct fid *a_fhp;
823 } */ *ap;
824 {
825 struct ifid ifh;
826 struct iso_node *ip = VTOI(ap->a_vp);
827
828 ifh.ifid_len = sizeof(struct ifid);
829
830 ifh.ifid_ino = ip->i_number;
831 ifh.ifid_start = ip->iso_start;
832 /*
833 * This intentionally uses sizeof(ifh) in order to not copy stack
834 * garbage on ILP32.
835 */
836 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
837
838 #ifdef ISOFS_DBG
839 printf("vptofh: ino %jd, start %ld\n",
840 (uintmax_t)ifh.ifid_ino, ifh.ifid_start);
841 #endif
842
843 return (0);
844 }
845
846 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
847 "cd9660 filesystem");
848 static int use_buf_pager = 1;
849 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN,
850 &use_buf_pager, 0,
851 "Use buffer pager instead of bmap");
852
853 static daddr_t
854 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
855 {
856
857 return (lblkno(VTOI(vp)->i_mnt, off));
858 }
859
860 static int
861 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz)
862 {
863 struct iso_node *ip;
864
865 ip = VTOI(vp);
866 *sz = blksize(ip->i_mnt, ip, lbn);
867 return (0);
868 }
869
870 static int
871 cd9660_getpages(struct vop_getpages_args *ap)
872 {
873 struct vnode *vp;
874
875 vp = ap->a_vp;
876 if (vp->v_type == VCHR || vp->v_type == VBLK)
877 return (EOPNOTSUPP);
878
879 if (use_buf_pager)
880 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count,
881 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno,
882 cd9660_gbp_getblksz));
883 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
884 ap->a_rbehind, ap->a_rahead, NULL, NULL));
885 }
886
887 /*
888 * Global vfs data structures for cd9660
889 */
890 struct vop_vector cd9660_vnodeops = {
891 .vop_default = &default_vnodeops,
892 .vop_open = cd9660_open,
893 .vop_access = cd9660_access,
894 .vop_bmap = cd9660_bmap,
895 .vop_cachedlookup = cd9660_lookup,
896 .vop_getattr = cd9660_getattr,
897 .vop_inactive = cd9660_inactive,
898 .vop_ioctl = cd9660_ioctl,
899 .vop_lookup = vfs_cache_lookup,
900 .vop_pathconf = cd9660_pathconf,
901 .vop_read = cd9660_read,
902 .vop_readdir = cd9660_readdir,
903 .vop_readlink = cd9660_readlink,
904 .vop_reclaim = cd9660_reclaim,
905 .vop_setattr = cd9660_setattr,
906 .vop_strategy = cd9660_strategy,
907 .vop_vptofh = cd9660_vptofh,
908 .vop_getpages = cd9660_getpages,
909 };
910 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops);
911
912 /*
913 * Special device vnode ops
914 */
915
916 struct vop_vector cd9660_fifoops = {
917 .vop_default = &fifo_specops,
918 .vop_access = cd9660_access,
919 .vop_getattr = cd9660_getattr,
920 .vop_inactive = cd9660_inactive,
921 .vop_reclaim = cd9660_reclaim,
922 .vop_setattr = cd9660_setattr,
923 .vop_vptofh = cd9660_vptofh,
924 };
925 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops);
Cache object: be156cc6c7369c614a243c7774dc3aef
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