Deleted Added
full compact
cd9660_vnops.c (154152) cd9660_vnops.c (166639)
1/*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
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).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
35 */
36
37#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
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).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/sys/fs/cd9660/cd9660_vnops.c 154152 2006-01-09 20:42:19Z tegge $");
38__FBSDID("$FreeBSD: head/sys/fs/cd9660/cd9660_vnops.c 166639 2007-02-11 13:54:25Z rodrigc $");
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/namei.h>
43#include <sys/kernel.h>
44#include <sys/conf.h>
45#include <sys/stat.h>
46#include <sys/bio.h>
47#include <sys/buf.h>
48#include <sys/mount.h>
49#include <sys/vnode.h>
50#include <fs/fifofs/fifo.h>
51#include <sys/malloc.h>
52#include <sys/dirent.h>
53#include <sys/unistd.h>
54#include <sys/filio.h>
55
56#include <vm/vm.h>
57#include <vm/vnode_pager.h>
58#include <vm/uma.h>
59
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/namei.h>
43#include <sys/kernel.h>
44#include <sys/conf.h>
45#include <sys/stat.h>
46#include <sys/bio.h>
47#include <sys/buf.h>
48#include <sys/mount.h>
49#include <sys/vnode.h>
50#include <fs/fifofs/fifo.h>
51#include <sys/malloc.h>
52#include <sys/dirent.h>
53#include <sys/unistd.h>
54#include <sys/filio.h>
55
56#include <vm/vm.h>
57#include <vm/vnode_pager.h>
58#include <vm/uma.h>
59
60#include <isofs/cd9660/iso.h>
61#include <isofs/cd9660/cd9660_node.h>
62#include <isofs/cd9660/iso_rrip.h>
60#include
61#include
62#include
63
64static vop_setattr_t cd9660_setattr;
65static vop_open_t cd9660_open;
66static vop_access_t cd9660_access;
67static vop_getattr_t cd9660_getattr;
68static vop_ioctl_t cd9660_ioctl;
69static vop_pathconf_t cd9660_pathconf;
70static vop_read_t cd9660_read;
71struct isoreaddir;
72static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
73static int iso_shipdir(struct isoreaddir *idp);
74static vop_readdir_t cd9660_readdir;
75static vop_readlink_t cd9660_readlink;
76static vop_strategy_t cd9660_strategy;
77
78/*
79 * Setattr call. Only allowed for block and character special devices.
80 */
81static int
82cd9660_setattr(ap)
83 struct vop_setattr_args /* {
84 struct vnodeop_desc *a_desc;
85 struct vnode *a_vp;
86 struct vattr *a_vap;
87 struct ucred *a_cred;
88 struct thread *a_td;
89 } */ *ap;
90{
91 struct vnode *vp = ap->a_vp;
92 struct vattr *vap = ap->a_vap;
93
94 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
95 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
96 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
97 return (EROFS);
98 if (vap->va_size != (u_quad_t)VNOVAL) {
99 switch (vp->v_type) {
100 case VDIR:
101 return (EISDIR);
102 case VLNK:
103 case VREG:
104 return (EROFS);
105 case VCHR:
106 case VBLK:
107 case VSOCK:
108 case VFIFO:
109 case VNON:
110 case VBAD:
111 case VMARKER:
112 return (0);
113 }
114 }
115 return (0);
116}
117
118/*
119 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
120 * The mode is shifted to select the owner/group/other fields. The
121 * super user is granted all permissions.
122 */
123/* ARGSUSED */
124static int
125cd9660_access(ap)
126 struct vop_access_args /* {
127 struct vnode *a_vp;
128 int a_mode;
129 struct ucred *a_cred;
130 struct thread *a_td;
131 } */ *ap;
132{
133 struct vnode *vp = ap->a_vp;
134 struct iso_node *ip = VTOI(vp);
135 mode_t mode = ap->a_mode;
136
137 if (vp->v_type == VCHR || vp->v_type == VBLK)
138 return (EOPNOTSUPP);
139
140 /*
141 * Disallow write attempts unless the file is a socket,
142 * fifo, or a block or character device resident on the
143 * filesystem.
144 */
145 if (mode & VWRITE) {
146 switch (vp->v_type) {
147 case VDIR:
148 case VLNK:
149 case VREG:
150 return (EROFS);
151 /* NOT REACHED */
152 default:
153 break;
154 }
155 }
156
157 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
158 ip->inode.iso_gid, ap->a_mode, ap->a_cred, NULL));
159}
160
161static int
162cd9660_open(ap)
163 struct vop_open_args /* {
164 struct vnode *a_vp;
165 int a_mode;
166 struct ucred *a_cred;
167 struct thread *a_td;
168 int a_fdidx;
169 } */ *ap;
170{
171 struct iso_node *ip = VTOI(ap->a_vp);
172
173 vnode_create_vobject(ap->a_vp, ip->i_size, ap->a_td);
174 return 0;
175}
176
177
178static int
179cd9660_getattr(ap)
180 struct vop_getattr_args /* {
181 struct vnode *a_vp;
182 struct vattr *a_vap;
183 struct ucred *a_cred;
184 struct thread *a_td;
185 } */ *ap;
186
187{
188 struct vnode *vp = ap->a_vp;
189 struct vattr *vap = ap->a_vap;
190 struct iso_node *ip = VTOI(vp);
191
192 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
193 vap->va_fileid = ip->i_number;
194
195 vap->va_mode = ip->inode.iso_mode;
196 vap->va_nlink = ip->inode.iso_links;
197 vap->va_uid = ip->inode.iso_uid;
198 vap->va_gid = ip->inode.iso_gid;
199 vap->va_atime = ip->inode.iso_atime;
200 vap->va_mtime = ip->inode.iso_mtime;
201 vap->va_ctime = ip->inode.iso_ctime;
202 vap->va_rdev = ip->inode.iso_rdev;
203
204 vap->va_size = (u_quad_t) ip->i_size;
205 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
206 struct vop_readlink_args rdlnk;
207 struct iovec aiov;
208 struct uio auio;
209 char *cp;
210
211 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
212 aiov.iov_base = cp;
213 aiov.iov_len = MAXPATHLEN;
214 auio.uio_iov = &aiov;
215 auio.uio_iovcnt = 1;
216 auio.uio_offset = 0;
217 auio.uio_rw = UIO_READ;
218 auio.uio_segflg = UIO_SYSSPACE;
219 auio.uio_td = ap->a_td;
220 auio.uio_resid = MAXPATHLEN;
221 rdlnk.a_uio = &auio;
222 rdlnk.a_vp = ap->a_vp;
223 rdlnk.a_cred = ap->a_cred;
224 if (cd9660_readlink(&rdlnk) == 0)
225 vap->va_size = MAXPATHLEN - auio.uio_resid;
226 FREE(cp, M_TEMP);
227 }
228 vap->va_flags = 0;
229 vap->va_gen = 1;
230 vap->va_blocksize = ip->i_mnt->logical_block_size;
231 vap->va_bytes = (u_quad_t) ip->i_size;
232 vap->va_type = vp->v_type;
233 vap->va_filerev = 0;
234 return (0);
235}
236
237/*
238 * Vnode op for ioctl.
239 */
240static int
241cd9660_ioctl(ap)
242 struct vop_ioctl_args /* {
243 struct vnode *a_vp;
244 u_long a_command;
245 caddr_t a_data;
246 int a_fflag;
247 struct ucred *a_cred;
248 struct thread *a_td;
249 } */ *ap;
250{
251 struct vnode *vp = ap->a_vp;
252 struct iso_node *ip = VTOI(vp);
253
254 if (vp->v_type == VCHR || vp->v_type == VBLK)
255 return (EOPNOTSUPP);
256
257 switch (ap->a_command) {
258
259 case FIOGETLBA:
260 *(int *)(ap->a_data) = ip->iso_start;
261 return 0;
262 default:
263 return (ENOTTY);
264 }
265}
266
267/*
268 * Vnode op for reading.
269 */
270static int
271cd9660_read(ap)
272 struct vop_read_args /* {
273 struct vnode *a_vp;
274 struct uio *a_uio;
275 int a_ioflag;
276 struct ucred *a_cred;
277 } */ *ap;
278{
279 struct vnode *vp = ap->a_vp;
280 struct uio *uio = ap->a_uio;
281 struct iso_node *ip = VTOI(vp);
282 struct iso_mnt *imp;
283 struct buf *bp;
284 daddr_t lbn, rablock;
285 off_t diff;
286 int rasize, error = 0;
287 int seqcount;
288 long size, n, on;
289
290 if (vp->v_type == VCHR || vp->v_type == VBLK)
291 return (EOPNOTSUPP);
292
293 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
294
295 if (uio->uio_resid == 0)
296 return (0);
297 if (uio->uio_offset < 0)
298 return (EINVAL);
299 ip->i_flag |= IN_ACCESS;
300 imp = ip->i_mnt;
301 do {
302 lbn = lblkno(imp, uio->uio_offset);
303 on = blkoff(imp, uio->uio_offset);
304 n = min((u_int)(imp->logical_block_size - on),
305 uio->uio_resid);
306 diff = (off_t)ip->i_size - uio->uio_offset;
307 if (diff <= 0)
308 return (0);
309 if (diff < n)
310 n = diff;
311 size = blksize(imp, ip, lbn);
312 rablock = lbn + 1;
313 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
314 if (lblktosize(imp, rablock) < ip->i_size)
315 error = cluster_read(vp, (off_t)ip->i_size,
316 lbn, size, NOCRED, uio->uio_resid,
317 (ap->a_ioflag >> 16), &bp);
318 else
319 error = bread(vp, lbn, size, NOCRED, &bp);
320 } else {
321 if (seqcount > 1 &&
322 lblktosize(imp, rablock) < ip->i_size) {
323 rasize = blksize(imp, ip, rablock);
324 error = breadn(vp, lbn, size, &rablock,
325 &rasize, 1, NOCRED, &bp);
326 } else
327 error = bread(vp, lbn, size, NOCRED, &bp);
328 }
329 n = min(n, size - bp->b_resid);
330 if (error) {
331 brelse(bp);
332 return (error);
333 }
334
335 error = uiomove(bp->b_data + on, (int)n, uio);
336 brelse(bp);
337 } while (error == 0 && uio->uio_resid > 0 && n != 0);
338 return (error);
339}
340
341/*
342 * Structure for reading directories
343 */
344struct isoreaddir {
345 struct dirent saveent;
346 struct dirent assocent;
347 struct dirent current;
348 off_t saveoff;
349 off_t assocoff;
350 off_t curroff;
351 struct uio *uio;
352 off_t uio_off;
353 int eofflag;
354 u_long *cookies;
355 int ncookies;
356};
357
358static int
359iso_uiodir(idp,dp,off)
360 struct isoreaddir *idp;
361 struct dirent *dp;
362 off_t off;
363{
364 int error;
365
366 dp->d_name[dp->d_namlen] = 0;
367 dp->d_reclen = GENERIC_DIRSIZ(dp);
368
369 if (idp->uio->uio_resid < dp->d_reclen) {
370 idp->eofflag = 0;
371 return (-1);
372 }
373
374 if (idp->cookies) {
375 if (idp->ncookies <= 0) {
376 idp->eofflag = 0;
377 return (-1);
378 }
379
380 *idp->cookies++ = off;
381 --idp->ncookies;
382 }
383
384 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
385 return (error);
386 idp->uio_off = off;
387 return (0);
388}
389
390static int
391iso_shipdir(idp)
392 struct isoreaddir *idp;
393{
394 struct dirent *dp;
395 int cl, sl, assoc;
396 int error;
397 char *cname, *sname;
398
399 cl = idp->current.d_namlen;
400 cname = idp->current.d_name;
401assoc = (cl > 1) && (*cname == ASSOCCHAR);
402 if (assoc) {
403 cl--;
404 cname++;
405 }
406
407 dp = &idp->saveent;
408 sname = dp->d_name;
409 if (!(sl = dp->d_namlen)) {
410 dp = &idp->assocent;
411 sname = dp->d_name + 1;
412 sl = dp->d_namlen - 1;
413 }
414 if (sl > 0) {
415 if (sl != cl
416 || bcmp(sname,cname,sl)) {
417 if (idp->assocent.d_namlen) {
418 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
419 return (error);
420 idp->assocent.d_namlen = 0;
421 }
422 if (idp->saveent.d_namlen) {
423 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
424 return (error);
425 idp->saveent.d_namlen = 0;
426 }
427 }
428 }
429 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
430 if (assoc) {
431 idp->assocoff = idp->curroff;
432 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
433 } else {
434 idp->saveoff = idp->curroff;
435 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
436 }
437 return (0);
438}
439
440/*
441 * Vnode op for readdir
442 */
443static int
444cd9660_readdir(ap)
445 struct vop_readdir_args /* {
446 struct vnode *a_vp;
447 struct uio *a_uio;
448 struct ucred *a_cred;
449 int *a_eofflag;
450 int *a_ncookies;
451 u_long **a_cookies;
452 } */ *ap;
453{
454 struct uio *uio = ap->a_uio;
455 struct isoreaddir *idp;
456 struct vnode *vdp = ap->a_vp;
457 struct iso_node *dp;
458 struct iso_mnt *imp;
459 struct buf *bp = NULL;
460 struct iso_directory_record *ep;
461 int entryoffsetinblock;
462 doff_t endsearch;
463 u_long bmask;
464 int error = 0;
465 int reclen;
466 u_short namelen;
467 int ncookies = 0;
468 u_long *cookies = NULL;
469
470 dp = VTOI(vdp);
471 imp = dp->i_mnt;
472 bmask = imp->im_bmask;
473
474 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
475 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
476 /*
477 * XXX
478 * Is it worth trying to figure out the type?
479 */
480 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
481 DT_UNKNOWN;
482 idp->uio = uio;
483 if (ap->a_ncookies == NULL) {
484 idp->cookies = NULL;
485 } else {
486 /*
487 * Guess the number of cookies needed.
488 */
489 ncookies = uio->uio_resid / 16;
490 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
491 M_TEMP, M_WAITOK);
492 idp->cookies = cookies;
493 idp->ncookies = ncookies;
494 }
495 idp->eofflag = 1;
496 idp->curroff = uio->uio_offset;
497
498 if ((entryoffsetinblock = idp->curroff & bmask) &&
499 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
500 FREE(idp, M_TEMP);
501 return (error);
502 }
503 endsearch = dp->i_size;
504
505 while (idp->curroff < endsearch) {
506 /*
507 * If offset is on a block boundary,
508 * read the next directory block.
509 * Release previous if it exists.
510 */
511 if ((idp->curroff & bmask) == 0) {
512 if (bp != NULL)
513 brelse(bp);
514 if ((error =
515 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
516 break;
517 entryoffsetinblock = 0;
518 }
519 /*
520 * Get pointer to next entry.
521 */
522 ep = (struct iso_directory_record *)
523 ((char *)bp->b_data + entryoffsetinblock);
524
525 reclen = isonum_711(ep->length);
526 if (reclen == 0) {
527 /* skip to next block, if any */
528 idp->curroff =
529 (idp->curroff & ~bmask) + imp->logical_block_size;
530 continue;
531 }
532
533 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
534 error = EINVAL;
535 /* illegal entry, stop */
536 break;
537 }
538
539 if (entryoffsetinblock + reclen > imp->logical_block_size) {
540 error = EINVAL;
541 /* illegal directory, so stop looking */
542 break;
543 }
544
545 idp->current.d_namlen = isonum_711(ep->name_len);
546
547 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
548 error = EINVAL;
549 /* illegal entry, stop */
550 break;
551 }
552
553 if (isonum_711(ep->flags)&2)
554 idp->current.d_fileno = isodirino(ep, imp);
555 else
556 idp->current.d_fileno = dbtob(bp->b_blkno) +
557 entryoffsetinblock;
558
559 idp->curroff += reclen;
560
561 switch (imp->iso_ftype) {
562 case ISO_FTYPE_RRIP:
563 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
564 &idp->current.d_fileno,imp);
565 idp->current.d_namlen = (u_char)namelen;
566 if (idp->current.d_namlen)
567 error = iso_uiodir(idp,&idp->current,idp->curroff);
568 break;
569 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
570 strcpy(idp->current.d_name,"..");
571 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
572 idp->current.d_namlen = 1;
573 error = iso_uiodir(idp,&idp->current,idp->curroff);
574 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
575 idp->current.d_namlen = 2;
576 error = iso_uiodir(idp,&idp->current,idp->curroff);
577 } else {
578 isofntrans(ep->name,idp->current.d_namlen,
579 idp->current.d_name, &namelen,
580 imp->iso_ftype == ISO_FTYPE_9660,
581 isonum_711(ep->flags)&4,
582 imp->joliet_level,
583 imp->im_flags,
584 imp->im_d2l);
585 idp->current.d_namlen = (u_char)namelen;
586 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
587 error = iso_shipdir(idp);
588 else
589 error = iso_uiodir(idp,&idp->current,idp->curroff);
590 }
591 }
592 if (error)
593 break;
594
595 entryoffsetinblock += reclen;
596 }
597
598 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
599 idp->current.d_namlen = 0;
600 error = iso_shipdir(idp);
601 }
602 if (error < 0)
603 error = 0;
604
605 if (ap->a_ncookies != NULL) {
606 if (error)
607 free(cookies, M_TEMP);
608 else {
609 /*
610 * Work out the number of cookies actually used.
611 */
612 *ap->a_ncookies = ncookies - idp->ncookies;
613 *ap->a_cookies = cookies;
614 }
615 }
616
617 if (bp)
618 brelse (bp);
619
620 uio->uio_offset = idp->uio_off;
621 *ap->a_eofflag = idp->eofflag;
622
623 FREE(idp, M_TEMP);
624
625 return (error);
626}
627
628/*
629 * Return target name of a symbolic link
630 * Shouldn't we get the parent vnode and read the data from there?
631 * This could eventually result in deadlocks in cd9660_lookup.
632 * But otherwise the block read here is in the block buffer two times.
633 */
634typedef struct iso_directory_record ISODIR;
635typedef struct iso_node ISONODE;
636typedef struct iso_mnt ISOMNT;
637static int
638cd9660_readlink(ap)
639 struct vop_readlink_args /* {
640 struct vnode *a_vp;
641 struct uio *a_uio;
642 struct ucred *a_cred;
643 } */ *ap;
644{
645 ISONODE *ip;
646 ISODIR *dirp;
647 ISOMNT *imp;
648 struct buf *bp;
649 struct uio *uio;
650 u_short symlen;
651 int error;
652 char *symname;
653
654 ip = VTOI(ap->a_vp);
655 imp = ip->i_mnt;
656 uio = ap->a_uio;
657
658 if (imp->iso_ftype != ISO_FTYPE_RRIP)
659 return (EINVAL);
660
661 /*
662 * Get parents directory record block that this inode included.
663 */
664 error = bread(imp->im_devvp,
665 (ip->i_number >> imp->im_bshift) <<
666 (imp->im_bshift - DEV_BSHIFT),
667 imp->logical_block_size, NOCRED, &bp);
668 if (error) {
669 brelse(bp);
670 return (EINVAL);
671 }
672
673 /*
674 * Setup the directory pointer for this inode
675 */
676 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
677
678 /*
679 * Just make sure, we have a right one....
680 * 1: Check not cross boundary on block
681 */
682 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
683 > (unsigned)imp->logical_block_size) {
684 brelse(bp);
685 return (EINVAL);
686 }
687
688 /*
689 * Now get a buffer
690 * Abuse a namei buffer for now.
691 */
692 if (uio->uio_segflg == UIO_SYSSPACE)
693 symname = uio->uio_iov->iov_base;
694 else
695 symname = uma_zalloc(namei_zone, M_WAITOK);
696
697 /*
698 * Ok, we just gathering a symbolic name in SL record.
699 */
700 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
701 if (uio->uio_segflg != UIO_SYSSPACE)
702 uma_zfree(namei_zone, symname);
703 brelse(bp);
704 return (EINVAL);
705 }
706 /*
707 * Don't forget before you leave from home ;-)
708 */
709 brelse(bp);
710
711 /*
712 * return with the symbolic name to caller's.
713 */
714 if (uio->uio_segflg != UIO_SYSSPACE) {
715 error = uiomove(symname, symlen, uio);
716 uma_zfree(namei_zone, symname);
717 return (error);
718 }
719 uio->uio_resid -= symlen;
720 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
721 uio->uio_iov->iov_len -= symlen;
722 return (0);
723}
724
725/*
726 * Calculate the logical to physical mapping if not done already,
727 * then call the device strategy routine.
728 */
729static int
730cd9660_strategy(ap)
731 struct vop_strategy_args /* {
732 struct buf *a_vp;
733 struct buf *a_bp;
734 } */ *ap;
735{
736 struct buf *bp = ap->a_bp;
737 struct vnode *vp = ap->a_vp;
738 struct iso_node *ip;
739 struct bufobj *bo;
740
741 ip = VTOI(vp);
742 if (vp->v_type == VBLK || vp->v_type == VCHR)
743 panic("cd9660_strategy: spec");
744 if (bp->b_blkno == bp->b_lblkno) {
745 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
746 (ip->i_mnt->im_bshift - DEV_BSHIFT);
747 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */
748 clrbuf(bp);
749 }
750 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */
751 bufdone(bp);
752 return (0);
753 }
754 bp->b_iooffset = dbtob(bp->b_blkno);
755 bo = ip->i_mnt->im_bo;
756 BO_STRATEGY(bo, bp);
757 return (0);
758}
759
760/*
761 * Return POSIX pathconf information applicable to cd9660 filesystems.
762 */
763static int
764cd9660_pathconf(ap)
765 struct vop_pathconf_args /* {
766 struct vnode *a_vp;
767 int a_name;
768 register_t *a_retval;
769 } */ *ap;
770{
771
772 switch (ap->a_name) {
773 case _PC_LINK_MAX:
774 *ap->a_retval = 1;
775 return (0);
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 return (0);
782 case _PC_PATH_MAX:
783 *ap->a_retval = PATH_MAX;
784 return (0);
785 case _PC_PIPE_BUF:
786 *ap->a_retval = PIPE_BUF;
787 return (0);
788 case _PC_CHOWN_RESTRICTED:
789 *ap->a_retval = 1;
790 return (0);
791 case _PC_NO_TRUNC:
792 *ap->a_retval = 1;
793 return (0);
794 default:
795 return (EINVAL);
796 }
797 /* NOTREACHED */
798}
799
800/*
801 * Global vfs data structures for cd9660
802 */
803struct vop_vector cd9660_vnodeops = {
804 .vop_default = &default_vnodeops,
805 .vop_open = cd9660_open,
806 .vop_access = cd9660_access,
807 .vop_bmap = cd9660_bmap,
808 .vop_cachedlookup = cd9660_lookup,
809 .vop_getattr = cd9660_getattr,
810 .vop_inactive = cd9660_inactive,
811 .vop_ioctl = cd9660_ioctl,
812 .vop_lookup = vfs_cache_lookup,
813 .vop_pathconf = cd9660_pathconf,
814 .vop_read = cd9660_read,
815 .vop_readdir = cd9660_readdir,
816 .vop_readlink = cd9660_readlink,
817 .vop_reclaim = cd9660_reclaim,
818 .vop_setattr = cd9660_setattr,
819 .vop_strategy = cd9660_strategy,
820};
821
822/*
823 * Special device vnode ops
824 */
825
826struct vop_vector cd9660_fifoops = {
827 .vop_default = &fifo_specops,
828 .vop_access = cd9660_access,
829 .vop_getattr = cd9660_getattr,
830 .vop_inactive = cd9660_inactive,
831 .vop_reclaim = cd9660_reclaim,
832 .vop_setattr = cd9660_setattr,
833};
63
64static vop_setattr_t cd9660_setattr;
65static vop_open_t cd9660_open;
66static vop_access_t cd9660_access;
67static vop_getattr_t cd9660_getattr;
68static vop_ioctl_t cd9660_ioctl;
69static vop_pathconf_t cd9660_pathconf;
70static vop_read_t cd9660_read;
71struct isoreaddir;
72static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
73static int iso_shipdir(struct isoreaddir *idp);
74static vop_readdir_t cd9660_readdir;
75static vop_readlink_t cd9660_readlink;
76static vop_strategy_t cd9660_strategy;
77
78/*
79 * Setattr call. Only allowed for block and character special devices.
80 */
81static int
82cd9660_setattr(ap)
83 struct vop_setattr_args /* {
84 struct vnodeop_desc *a_desc;
85 struct vnode *a_vp;
86 struct vattr *a_vap;
87 struct ucred *a_cred;
88 struct thread *a_td;
89 } */ *ap;
90{
91 struct vnode *vp = ap->a_vp;
92 struct vattr *vap = ap->a_vap;
93
94 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
95 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
96 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
97 return (EROFS);
98 if (vap->va_size != (u_quad_t)VNOVAL) {
99 switch (vp->v_type) {
100 case VDIR:
101 return (EISDIR);
102 case VLNK:
103 case VREG:
104 return (EROFS);
105 case VCHR:
106 case VBLK:
107 case VSOCK:
108 case VFIFO:
109 case VNON:
110 case VBAD:
111 case VMARKER:
112 return (0);
113 }
114 }
115 return (0);
116}
117
118/*
119 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
120 * The mode is shifted to select the owner/group/other fields. The
121 * super user is granted all permissions.
122 */
123/* ARGSUSED */
124static int
125cd9660_access(ap)
126 struct vop_access_args /* {
127 struct vnode *a_vp;
128 int a_mode;
129 struct ucred *a_cred;
130 struct thread *a_td;
131 } */ *ap;
132{
133 struct vnode *vp = ap->a_vp;
134 struct iso_node *ip = VTOI(vp);
135 mode_t mode = ap->a_mode;
136
137 if (vp->v_type == VCHR || vp->v_type == VBLK)
138 return (EOPNOTSUPP);
139
140 /*
141 * Disallow write attempts unless the file is a socket,
142 * fifo, or a block or character device resident on the
143 * filesystem.
144 */
145 if (mode & VWRITE) {
146 switch (vp->v_type) {
147 case VDIR:
148 case VLNK:
149 case VREG:
150 return (EROFS);
151 /* NOT REACHED */
152 default:
153 break;
154 }
155 }
156
157 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
158 ip->inode.iso_gid, ap->a_mode, ap->a_cred, NULL));
159}
160
161static int
162cd9660_open(ap)
163 struct vop_open_args /* {
164 struct vnode *a_vp;
165 int a_mode;
166 struct ucred *a_cred;
167 struct thread *a_td;
168 int a_fdidx;
169 } */ *ap;
170{
171 struct iso_node *ip = VTOI(ap->a_vp);
172
173 vnode_create_vobject(ap->a_vp, ip->i_size, ap->a_td);
174 return 0;
175}
176
177
178static int
179cd9660_getattr(ap)
180 struct vop_getattr_args /* {
181 struct vnode *a_vp;
182 struct vattr *a_vap;
183 struct ucred *a_cred;
184 struct thread *a_td;
185 } */ *ap;
186
187{
188 struct vnode *vp = ap->a_vp;
189 struct vattr *vap = ap->a_vap;
190 struct iso_node *ip = VTOI(vp);
191
192 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
193 vap->va_fileid = ip->i_number;
194
195 vap->va_mode = ip->inode.iso_mode;
196 vap->va_nlink = ip->inode.iso_links;
197 vap->va_uid = ip->inode.iso_uid;
198 vap->va_gid = ip->inode.iso_gid;
199 vap->va_atime = ip->inode.iso_atime;
200 vap->va_mtime = ip->inode.iso_mtime;
201 vap->va_ctime = ip->inode.iso_ctime;
202 vap->va_rdev = ip->inode.iso_rdev;
203
204 vap->va_size = (u_quad_t) ip->i_size;
205 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
206 struct vop_readlink_args rdlnk;
207 struct iovec aiov;
208 struct uio auio;
209 char *cp;
210
211 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
212 aiov.iov_base = cp;
213 aiov.iov_len = MAXPATHLEN;
214 auio.uio_iov = &aiov;
215 auio.uio_iovcnt = 1;
216 auio.uio_offset = 0;
217 auio.uio_rw = UIO_READ;
218 auio.uio_segflg = UIO_SYSSPACE;
219 auio.uio_td = ap->a_td;
220 auio.uio_resid = MAXPATHLEN;
221 rdlnk.a_uio = &auio;
222 rdlnk.a_vp = ap->a_vp;
223 rdlnk.a_cred = ap->a_cred;
224 if (cd9660_readlink(&rdlnk) == 0)
225 vap->va_size = MAXPATHLEN - auio.uio_resid;
226 FREE(cp, M_TEMP);
227 }
228 vap->va_flags = 0;
229 vap->va_gen = 1;
230 vap->va_blocksize = ip->i_mnt->logical_block_size;
231 vap->va_bytes = (u_quad_t) ip->i_size;
232 vap->va_type = vp->v_type;
233 vap->va_filerev = 0;
234 return (0);
235}
236
237/*
238 * Vnode op for ioctl.
239 */
240static int
241cd9660_ioctl(ap)
242 struct vop_ioctl_args /* {
243 struct vnode *a_vp;
244 u_long a_command;
245 caddr_t a_data;
246 int a_fflag;
247 struct ucred *a_cred;
248 struct thread *a_td;
249 } */ *ap;
250{
251 struct vnode *vp = ap->a_vp;
252 struct iso_node *ip = VTOI(vp);
253
254 if (vp->v_type == VCHR || vp->v_type == VBLK)
255 return (EOPNOTSUPP);
256
257 switch (ap->a_command) {
258
259 case FIOGETLBA:
260 *(int *)(ap->a_data) = ip->iso_start;
261 return 0;
262 default:
263 return (ENOTTY);
264 }
265}
266
267/*
268 * Vnode op for reading.
269 */
270static int
271cd9660_read(ap)
272 struct vop_read_args /* {
273 struct vnode *a_vp;
274 struct uio *a_uio;
275 int a_ioflag;
276 struct ucred *a_cred;
277 } */ *ap;
278{
279 struct vnode *vp = ap->a_vp;
280 struct uio *uio = ap->a_uio;
281 struct iso_node *ip = VTOI(vp);
282 struct iso_mnt *imp;
283 struct buf *bp;
284 daddr_t lbn, rablock;
285 off_t diff;
286 int rasize, error = 0;
287 int seqcount;
288 long size, n, on;
289
290 if (vp->v_type == VCHR || vp->v_type == VBLK)
291 return (EOPNOTSUPP);
292
293 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
294
295 if (uio->uio_resid == 0)
296 return (0);
297 if (uio->uio_offset < 0)
298 return (EINVAL);
299 ip->i_flag |= IN_ACCESS;
300 imp = ip->i_mnt;
301 do {
302 lbn = lblkno(imp, uio->uio_offset);
303 on = blkoff(imp, uio->uio_offset);
304 n = min((u_int)(imp->logical_block_size - on),
305 uio->uio_resid);
306 diff = (off_t)ip->i_size - uio->uio_offset;
307 if (diff <= 0)
308 return (0);
309 if (diff < n)
310 n = diff;
311 size = blksize(imp, ip, lbn);
312 rablock = lbn + 1;
313 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
314 if (lblktosize(imp, rablock) < ip->i_size)
315 error = cluster_read(vp, (off_t)ip->i_size,
316 lbn, size, NOCRED, uio->uio_resid,
317 (ap->a_ioflag >> 16), &bp);
318 else
319 error = bread(vp, lbn, size, NOCRED, &bp);
320 } else {
321 if (seqcount > 1 &&
322 lblktosize(imp, rablock) < ip->i_size) {
323 rasize = blksize(imp, ip, rablock);
324 error = breadn(vp, lbn, size, &rablock,
325 &rasize, 1, NOCRED, &bp);
326 } else
327 error = bread(vp, lbn, size, NOCRED, &bp);
328 }
329 n = min(n, size - bp->b_resid);
330 if (error) {
331 brelse(bp);
332 return (error);
333 }
334
335 error = uiomove(bp->b_data + on, (int)n, uio);
336 brelse(bp);
337 } while (error == 0 && uio->uio_resid > 0 && n != 0);
338 return (error);
339}
340
341/*
342 * Structure for reading directories
343 */
344struct isoreaddir {
345 struct dirent saveent;
346 struct dirent assocent;
347 struct dirent current;
348 off_t saveoff;
349 off_t assocoff;
350 off_t curroff;
351 struct uio *uio;
352 off_t uio_off;
353 int eofflag;
354 u_long *cookies;
355 int ncookies;
356};
357
358static int
359iso_uiodir(idp,dp,off)
360 struct isoreaddir *idp;
361 struct dirent *dp;
362 off_t off;
363{
364 int error;
365
366 dp->d_name[dp->d_namlen] = 0;
367 dp->d_reclen = GENERIC_DIRSIZ(dp);
368
369 if (idp->uio->uio_resid < dp->d_reclen) {
370 idp->eofflag = 0;
371 return (-1);
372 }
373
374 if (idp->cookies) {
375 if (idp->ncookies <= 0) {
376 idp->eofflag = 0;
377 return (-1);
378 }
379
380 *idp->cookies++ = off;
381 --idp->ncookies;
382 }
383
384 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
385 return (error);
386 idp->uio_off = off;
387 return (0);
388}
389
390static int
391iso_shipdir(idp)
392 struct isoreaddir *idp;
393{
394 struct dirent *dp;
395 int cl, sl, assoc;
396 int error;
397 char *cname, *sname;
398
399 cl = idp->current.d_namlen;
400 cname = idp->current.d_name;
401assoc = (cl > 1) && (*cname == ASSOCCHAR);
402 if (assoc) {
403 cl--;
404 cname++;
405 }
406
407 dp = &idp->saveent;
408 sname = dp->d_name;
409 if (!(sl = dp->d_namlen)) {
410 dp = &idp->assocent;
411 sname = dp->d_name + 1;
412 sl = dp->d_namlen - 1;
413 }
414 if (sl > 0) {
415 if (sl != cl
416 || bcmp(sname,cname,sl)) {
417 if (idp->assocent.d_namlen) {
418 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
419 return (error);
420 idp->assocent.d_namlen = 0;
421 }
422 if (idp->saveent.d_namlen) {
423 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
424 return (error);
425 idp->saveent.d_namlen = 0;
426 }
427 }
428 }
429 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
430 if (assoc) {
431 idp->assocoff = idp->curroff;
432 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
433 } else {
434 idp->saveoff = idp->curroff;
435 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
436 }
437 return (0);
438}
439
440/*
441 * Vnode op for readdir
442 */
443static int
444cd9660_readdir(ap)
445 struct vop_readdir_args /* {
446 struct vnode *a_vp;
447 struct uio *a_uio;
448 struct ucred *a_cred;
449 int *a_eofflag;
450 int *a_ncookies;
451 u_long **a_cookies;
452 } */ *ap;
453{
454 struct uio *uio = ap->a_uio;
455 struct isoreaddir *idp;
456 struct vnode *vdp = ap->a_vp;
457 struct iso_node *dp;
458 struct iso_mnt *imp;
459 struct buf *bp = NULL;
460 struct iso_directory_record *ep;
461 int entryoffsetinblock;
462 doff_t endsearch;
463 u_long bmask;
464 int error = 0;
465 int reclen;
466 u_short namelen;
467 int ncookies = 0;
468 u_long *cookies = NULL;
469
470 dp = VTOI(vdp);
471 imp = dp->i_mnt;
472 bmask = imp->im_bmask;
473
474 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
475 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
476 /*
477 * XXX
478 * Is it worth trying to figure out the type?
479 */
480 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
481 DT_UNKNOWN;
482 idp->uio = uio;
483 if (ap->a_ncookies == NULL) {
484 idp->cookies = NULL;
485 } else {
486 /*
487 * Guess the number of cookies needed.
488 */
489 ncookies = uio->uio_resid / 16;
490 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
491 M_TEMP, M_WAITOK);
492 idp->cookies = cookies;
493 idp->ncookies = ncookies;
494 }
495 idp->eofflag = 1;
496 idp->curroff = uio->uio_offset;
497
498 if ((entryoffsetinblock = idp->curroff & bmask) &&
499 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
500 FREE(idp, M_TEMP);
501 return (error);
502 }
503 endsearch = dp->i_size;
504
505 while (idp->curroff < endsearch) {
506 /*
507 * If offset is on a block boundary,
508 * read the next directory block.
509 * Release previous if it exists.
510 */
511 if ((idp->curroff & bmask) == 0) {
512 if (bp != NULL)
513 brelse(bp);
514 if ((error =
515 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
516 break;
517 entryoffsetinblock = 0;
518 }
519 /*
520 * Get pointer to next entry.
521 */
522 ep = (struct iso_directory_record *)
523 ((char *)bp->b_data + entryoffsetinblock);
524
525 reclen = isonum_711(ep->length);
526 if (reclen == 0) {
527 /* skip to next block, if any */
528 idp->curroff =
529 (idp->curroff & ~bmask) + imp->logical_block_size;
530 continue;
531 }
532
533 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
534 error = EINVAL;
535 /* illegal entry, stop */
536 break;
537 }
538
539 if (entryoffsetinblock + reclen > imp->logical_block_size) {
540 error = EINVAL;
541 /* illegal directory, so stop looking */
542 break;
543 }
544
545 idp->current.d_namlen = isonum_711(ep->name_len);
546
547 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
548 error = EINVAL;
549 /* illegal entry, stop */
550 break;
551 }
552
553 if (isonum_711(ep->flags)&2)
554 idp->current.d_fileno = isodirino(ep, imp);
555 else
556 idp->current.d_fileno = dbtob(bp->b_blkno) +
557 entryoffsetinblock;
558
559 idp->curroff += reclen;
560
561 switch (imp->iso_ftype) {
562 case ISO_FTYPE_RRIP:
563 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
564 &idp->current.d_fileno,imp);
565 idp->current.d_namlen = (u_char)namelen;
566 if (idp->current.d_namlen)
567 error = iso_uiodir(idp,&idp->current,idp->curroff);
568 break;
569 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
570 strcpy(idp->current.d_name,"..");
571 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
572 idp->current.d_namlen = 1;
573 error = iso_uiodir(idp,&idp->current,idp->curroff);
574 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
575 idp->current.d_namlen = 2;
576 error = iso_uiodir(idp,&idp->current,idp->curroff);
577 } else {
578 isofntrans(ep->name,idp->current.d_namlen,
579 idp->current.d_name, &namelen,
580 imp->iso_ftype == ISO_FTYPE_9660,
581 isonum_711(ep->flags)&4,
582 imp->joliet_level,
583 imp->im_flags,
584 imp->im_d2l);
585 idp->current.d_namlen = (u_char)namelen;
586 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
587 error = iso_shipdir(idp);
588 else
589 error = iso_uiodir(idp,&idp->current,idp->curroff);
590 }
591 }
592 if (error)
593 break;
594
595 entryoffsetinblock += reclen;
596 }
597
598 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
599 idp->current.d_namlen = 0;
600 error = iso_shipdir(idp);
601 }
602 if (error < 0)
603 error = 0;
604
605 if (ap->a_ncookies != NULL) {
606 if (error)
607 free(cookies, M_TEMP);
608 else {
609 /*
610 * Work out the number of cookies actually used.
611 */
612 *ap->a_ncookies = ncookies - idp->ncookies;
613 *ap->a_cookies = cookies;
614 }
615 }
616
617 if (bp)
618 brelse (bp);
619
620 uio->uio_offset = idp->uio_off;
621 *ap->a_eofflag = idp->eofflag;
622
623 FREE(idp, M_TEMP);
624
625 return (error);
626}
627
628/*
629 * Return target name of a symbolic link
630 * Shouldn't we get the parent vnode and read the data from there?
631 * This could eventually result in deadlocks in cd9660_lookup.
632 * But otherwise the block read here is in the block buffer two times.
633 */
634typedef struct iso_directory_record ISODIR;
635typedef struct iso_node ISONODE;
636typedef struct iso_mnt ISOMNT;
637static int
638cd9660_readlink(ap)
639 struct vop_readlink_args /* {
640 struct vnode *a_vp;
641 struct uio *a_uio;
642 struct ucred *a_cred;
643 } */ *ap;
644{
645 ISONODE *ip;
646 ISODIR *dirp;
647 ISOMNT *imp;
648 struct buf *bp;
649 struct uio *uio;
650 u_short symlen;
651 int error;
652 char *symname;
653
654 ip = VTOI(ap->a_vp);
655 imp = ip->i_mnt;
656 uio = ap->a_uio;
657
658 if (imp->iso_ftype != ISO_FTYPE_RRIP)
659 return (EINVAL);
660
661 /*
662 * Get parents directory record block that this inode included.
663 */
664 error = bread(imp->im_devvp,
665 (ip->i_number >> imp->im_bshift) <<
666 (imp->im_bshift - DEV_BSHIFT),
667 imp->logical_block_size, NOCRED, &bp);
668 if (error) {
669 brelse(bp);
670 return (EINVAL);
671 }
672
673 /*
674 * Setup the directory pointer for this inode
675 */
676 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
677
678 /*
679 * Just make sure, we have a right one....
680 * 1: Check not cross boundary on block
681 */
682 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
683 > (unsigned)imp->logical_block_size) {
684 brelse(bp);
685 return (EINVAL);
686 }
687
688 /*
689 * Now get a buffer
690 * Abuse a namei buffer for now.
691 */
692 if (uio->uio_segflg == UIO_SYSSPACE)
693 symname = uio->uio_iov->iov_base;
694 else
695 symname = uma_zalloc(namei_zone, M_WAITOK);
696
697 /*
698 * Ok, we just gathering a symbolic name in SL record.
699 */
700 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
701 if (uio->uio_segflg != UIO_SYSSPACE)
702 uma_zfree(namei_zone, symname);
703 brelse(bp);
704 return (EINVAL);
705 }
706 /*
707 * Don't forget before you leave from home ;-)
708 */
709 brelse(bp);
710
711 /*
712 * return with the symbolic name to caller's.
713 */
714 if (uio->uio_segflg != UIO_SYSSPACE) {
715 error = uiomove(symname, symlen, uio);
716 uma_zfree(namei_zone, symname);
717 return (error);
718 }
719 uio->uio_resid -= symlen;
720 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
721 uio->uio_iov->iov_len -= symlen;
722 return (0);
723}
724
725/*
726 * Calculate the logical to physical mapping if not done already,
727 * then call the device strategy routine.
728 */
729static int
730cd9660_strategy(ap)
731 struct vop_strategy_args /* {
732 struct buf *a_vp;
733 struct buf *a_bp;
734 } */ *ap;
735{
736 struct buf *bp = ap->a_bp;
737 struct vnode *vp = ap->a_vp;
738 struct iso_node *ip;
739 struct bufobj *bo;
740
741 ip = VTOI(vp);
742 if (vp->v_type == VBLK || vp->v_type == VCHR)
743 panic("cd9660_strategy: spec");
744 if (bp->b_blkno == bp->b_lblkno) {
745 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
746 (ip->i_mnt->im_bshift - DEV_BSHIFT);
747 if ((long)bp->b_blkno == -1) /* XXX: cut&paste junk ? */
748 clrbuf(bp);
749 }
750 if ((long)bp->b_blkno == -1) { /* XXX: cut&paste junk ? */
751 bufdone(bp);
752 return (0);
753 }
754 bp->b_iooffset = dbtob(bp->b_blkno);
755 bo = ip->i_mnt->im_bo;
756 BO_STRATEGY(bo, bp);
757 return (0);
758}
759
760/*
761 * Return POSIX pathconf information applicable to cd9660 filesystems.
762 */
763static int
764cd9660_pathconf(ap)
765 struct vop_pathconf_args /* {
766 struct vnode *a_vp;
767 int a_name;
768 register_t *a_retval;
769 } */ *ap;
770{
771
772 switch (ap->a_name) {
773 case _PC_LINK_MAX:
774 *ap->a_retval = 1;
775 return (0);
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 return (0);
782 case _PC_PATH_MAX:
783 *ap->a_retval = PATH_MAX;
784 return (0);
785 case _PC_PIPE_BUF:
786 *ap->a_retval = PIPE_BUF;
787 return (0);
788 case _PC_CHOWN_RESTRICTED:
789 *ap->a_retval = 1;
790 return (0);
791 case _PC_NO_TRUNC:
792 *ap->a_retval = 1;
793 return (0);
794 default:
795 return (EINVAL);
796 }
797 /* NOTREACHED */
798}
799
800/*
801 * Global vfs data structures for cd9660
802 */
803struct vop_vector cd9660_vnodeops = {
804 .vop_default = &default_vnodeops,
805 .vop_open = cd9660_open,
806 .vop_access = cd9660_access,
807 .vop_bmap = cd9660_bmap,
808 .vop_cachedlookup = cd9660_lookup,
809 .vop_getattr = cd9660_getattr,
810 .vop_inactive = cd9660_inactive,
811 .vop_ioctl = cd9660_ioctl,
812 .vop_lookup = vfs_cache_lookup,
813 .vop_pathconf = cd9660_pathconf,
814 .vop_read = cd9660_read,
815 .vop_readdir = cd9660_readdir,
816 .vop_readlink = cd9660_readlink,
817 .vop_reclaim = cd9660_reclaim,
818 .vop_setattr = cd9660_setattr,
819 .vop_strategy = cd9660_strategy,
820};
821
822/*
823 * Special device vnode ops
824 */
825
826struct vop_vector cd9660_fifoops = {
827 .vop_default = &fifo_specops,
828 .vop_access = cd9660_access,
829 .vop_getattr = cd9660_getattr,
830 .vop_inactive = cd9660_inactive,
831 .vop_reclaim = cd9660_reclaim,
832 .vop_setattr = cd9660_setattr,
833};