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: releng/10.4/sys/fs/cd9660/cd9660_vnops.c 248282 2013-03-14 20:28:26Z kib $");
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 <sys/malloc.h>
51 #include <sys/dirent.h>
52 #include <sys/unistd.h>
53 #include <sys/filio.h>
54
55 #include <vm/vm.h>
56 #include <vm/vnode_pager.h>
57 #include <vm/uma.h>
58
59 #include <fs/cd9660/iso.h>
60 #include <fs/cd9660/cd9660_node.h>
61 #include <fs/cd9660/iso_rrip.h>
62
63 static vop_setattr_t cd9660_setattr;
64 static vop_open_t cd9660_open;
65 static vop_access_t cd9660_access;
66 static vop_getattr_t cd9660_getattr;
67 static vop_ioctl_t cd9660_ioctl;
68 static vop_pathconf_t cd9660_pathconf;
69 static vop_read_t cd9660_read;
70 struct isoreaddir;
71 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
72 static int iso_shipdir(struct isoreaddir *idp);
73 static vop_readdir_t cd9660_readdir;
74 static vop_readlink_t cd9660_readlink;
75 static vop_strategy_t cd9660_strategy;
76 static vop_vptofh_t cd9660_vptofh;
77
78 /*
79 * Setattr call. Only allowed for block and character special devices.
80 */
81 static int
82 cd9660_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 } */ *ap;
89 {
90 struct vnode *vp = ap->a_vp;
91 struct vattr *vap = ap->a_vap;
92
93 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
94 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
95 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
96 return (EROFS);
97 if (vap->va_size != (u_quad_t)VNOVAL) {
98 switch (vp->v_type) {
99 case VDIR:
100 return (EISDIR);
101 case VLNK:
102 case VREG:
103 return (EROFS);
104 case VCHR:
105 case VBLK:
106 case VSOCK:
107 case VFIFO:
108 case VNON:
109 case VBAD:
110 case VMARKER:
111 return (0);
112 }
113 }
114 return (0);
115 }
116
117 /*
118 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
119 * The mode is shifted to select the owner/group/other fields. The
120 * super user is granted all permissions.
121 */
122 /* ARGSUSED */
123 static int
124 cd9660_access(ap)
125 struct vop_access_args /* {
126 struct vnode *a_vp;
127 accmode_t a_accmode;
128 struct ucred *a_cred;
129 struct thread *a_td;
130 } */ *ap;
131 {
132 struct vnode *vp = ap->a_vp;
133 struct iso_node *ip = VTOI(vp);
134 accmode_t accmode = ap->a_accmode;
135
136 if (vp->v_type == VCHR || vp->v_type == VBLK)
137 return (EOPNOTSUPP);
138
139 /*
140 * Disallow write attempts unless the file is a socket,
141 * fifo, or a block or character device resident on the
142 * filesystem.
143 */
144 if (accmode & VWRITE) {
145 switch (vp->v_type) {
146 case VDIR:
147 case VLNK:
148 case VREG:
149 return (EROFS);
150 /* NOT REACHED */
151 default:
152 break;
153 }
154 }
155
156 return (vaccess(vp->v_type, ip->inode.iso_mode, ip->inode.iso_uid,
157 ip->inode.iso_gid, ap->a_accmode, ap->a_cred, NULL));
158 }
159
160 static int
161 cd9660_open(ap)
162 struct vop_open_args /* {
163 struct vnode *a_vp;
164 int a_mode;
165 struct ucred *a_cred;
166 struct thread *a_td;
167 struct file *a_fp;
168 } */ *ap;
169 {
170 struct vnode *vp = ap->a_vp;
171 struct iso_node *ip = VTOI(vp);
172
173 if (vp->v_type == VCHR || vp->v_type == VBLK)
174 return (EOPNOTSUPP);
175
176 vnode_create_vobject(vp, ip->i_size, ap->a_td);
177 return (0);
178 }
179
180
181 static int
182 cd9660_getattr(ap)
183 struct vop_getattr_args /* {
184 struct vnode *a_vp;
185 struct vattr *a_vap;
186 struct ucred *a_cred;
187 } */ *ap;
188
189 {
190 struct vnode *vp = ap->a_vp;
191 struct vattr *vap = ap->a_vap;
192 struct iso_node *ip = VTOI(vp);
193
194 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
195 vap->va_fileid = ip->i_number;
196
197 vap->va_mode = ip->inode.iso_mode;
198 vap->va_nlink = ip->inode.iso_links;
199 vap->va_uid = ip->inode.iso_uid;
200 vap->va_gid = ip->inode.iso_gid;
201 vap->va_atime = ip->inode.iso_atime;
202 vap->va_mtime = ip->inode.iso_mtime;
203 vap->va_ctime = ip->inode.iso_ctime;
204 vap->va_rdev = ip->inode.iso_rdev;
205
206 vap->va_size = (u_quad_t) ip->i_size;
207 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
208 struct vop_readlink_args rdlnk;
209 struct iovec aiov;
210 struct uio auio;
211 char *cp;
212
213 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
214 aiov.iov_base = cp;
215 aiov.iov_len = MAXPATHLEN;
216 auio.uio_iov = &aiov;
217 auio.uio_iovcnt = 1;
218 auio.uio_offset = 0;
219 auio.uio_rw = UIO_READ;
220 auio.uio_segflg = UIO_SYSSPACE;
221 auio.uio_td = curthread;
222 auio.uio_resid = MAXPATHLEN;
223 rdlnk.a_uio = &auio;
224 rdlnk.a_vp = ap->a_vp;
225 rdlnk.a_cred = ap->a_cred;
226 if (cd9660_readlink(&rdlnk) == 0)
227 vap->va_size = MAXPATHLEN - auio.uio_resid;
228 free(cp, M_TEMP);
229 }
230 vap->va_flags = 0;
231 vap->va_gen = 1;
232 vap->va_blocksize = ip->i_mnt->logical_block_size;
233 vap->va_bytes = (u_quad_t) ip->i_size;
234 vap->va_type = vp->v_type;
235 vap->va_filerev = 0;
236 return (0);
237 }
238
239 /*
240 * Vnode op for ioctl.
241 */
242 static int
243 cd9660_ioctl(ap)
244 struct vop_ioctl_args /* {
245 struct vnode *a_vp;
246 u_long a_command;
247 caddr_t a_data;
248 int a_fflag;
249 struct ucred *a_cred;
250 struct thread *a_td;
251 } */ *ap;
252 {
253 struct vnode *vp;
254 struct iso_node *ip;
255 int error;
256
257 vp = ap->a_vp;
258 vn_lock(vp, LK_SHARED | LK_RETRY);
259 if (vp->v_iflag & VI_DOOMED) {
260 VOP_UNLOCK(vp, 0);
261 return (EBADF);
262 }
263 if (vp->v_type == VCHR || vp->v_type == VBLK) {
264 VOP_UNLOCK(vp, 0);
265 return (EOPNOTSUPP);
266 }
267
268 ip = VTOI(vp);
269 error = 0;
270
271 switch (ap->a_command) {
272 case FIOGETLBA:
273 *(int *)(ap->a_data) = ip->iso_start;
274 break;
275 default:
276 error = ENOTTY;
277 break;
278 }
279
280 VOP_UNLOCK(vp, 0);
281 return (error);
282 }
283
284 /*
285 * Vnode op for reading.
286 */
287 static int
288 cd9660_read(ap)
289 struct vop_read_args /* {
290 struct vnode *a_vp;
291 struct uio *a_uio;
292 int a_ioflag;
293 struct ucred *a_cred;
294 } */ *ap;
295 {
296 struct vnode *vp = ap->a_vp;
297 struct uio *uio = ap->a_uio;
298 struct iso_node *ip = VTOI(vp);
299 struct iso_mnt *imp;
300 struct buf *bp;
301 daddr_t lbn, rablock;
302 off_t diff;
303 int rasize, error = 0;
304 int seqcount;
305 long size, n, on;
306
307 if (vp->v_type == VCHR || vp->v_type == VBLK)
308 return (EOPNOTSUPP);
309
310 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
311
312 if (uio->uio_resid == 0)
313 return (0);
314 if (uio->uio_offset < 0)
315 return (EINVAL);
316 imp = ip->i_mnt;
317 do {
318 lbn = lblkno(imp, uio->uio_offset);
319 on = blkoff(imp, uio->uio_offset);
320 n = MIN(imp->logical_block_size - on, uio->uio_resid);
321 diff = (off_t)ip->i_size - uio->uio_offset;
322 if (diff <= 0)
323 return (0);
324 if (diff < n)
325 n = diff;
326 size = blksize(imp, ip, lbn);
327 rablock = lbn + 1;
328 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
329 if (lblktosize(imp, rablock) < ip->i_size)
330 error = cluster_read(vp, (off_t)ip->i_size,
331 lbn, size, NOCRED, uio->uio_resid,
332 (ap->a_ioflag >> 16), 0, &bp);
333 else
334 error = bread(vp, lbn, size, NOCRED, &bp);
335 } else {
336 if (seqcount > 1 &&
337 lblktosize(imp, rablock) < ip->i_size) {
338 rasize = blksize(imp, ip, rablock);
339 error = breadn(vp, lbn, size, &rablock,
340 &rasize, 1, NOCRED, &bp);
341 } else
342 error = bread(vp, lbn, size, NOCRED, &bp);
343 }
344 n = MIN(n, size - bp->b_resid);
345 if (error) {
346 brelse(bp);
347 return (error);
348 }
349
350 error = uiomove(bp->b_data + on, (int)n, uio);
351 brelse(bp);
352 } while (error == 0 && uio->uio_resid > 0 && n != 0);
353 return (error);
354 }
355
356 /*
357 * Structure for reading directories
358 */
359 struct isoreaddir {
360 struct dirent saveent;
361 struct dirent assocent;
362 struct dirent current;
363 off_t saveoff;
364 off_t assocoff;
365 off_t curroff;
366 struct uio *uio;
367 off_t uio_off;
368 int eofflag;
369 u_long *cookies;
370 int ncookies;
371 };
372
373 static int
374 iso_uiodir(idp,dp,off)
375 struct isoreaddir *idp;
376 struct dirent *dp;
377 off_t off;
378 {
379 int error;
380
381 dp->d_name[dp->d_namlen] = 0;
382 dp->d_reclen = GENERIC_DIRSIZ(dp);
383
384 if (idp->uio->uio_resid < dp->d_reclen) {
385 idp->eofflag = 0;
386 return (-1);
387 }
388
389 if (idp->cookies) {
390 if (idp->ncookies <= 0) {
391 idp->eofflag = 0;
392 return (-1);
393 }
394
395 *idp->cookies++ = off;
396 --idp->ncookies;
397 }
398
399 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
400 return (error);
401 idp->uio_off = off;
402 return (0);
403 }
404
405 static int
406 iso_shipdir(idp)
407 struct isoreaddir *idp;
408 {
409 struct dirent *dp;
410 int cl, sl, assoc;
411 int error;
412 char *cname, *sname;
413
414 cl = idp->current.d_namlen;
415 cname = idp->current.d_name;
416 assoc = (cl > 1) && (*cname == ASSOCCHAR);
417 if (assoc) {
418 cl--;
419 cname++;
420 }
421
422 dp = &idp->saveent;
423 sname = dp->d_name;
424 if (!(sl = dp->d_namlen)) {
425 dp = &idp->assocent;
426 sname = dp->d_name + 1;
427 sl = dp->d_namlen - 1;
428 }
429 if (sl > 0) {
430 if (sl != cl
431 || bcmp(sname,cname,sl)) {
432 if (idp->assocent.d_namlen) {
433 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
434 return (error);
435 idp->assocent.d_namlen = 0;
436 }
437 if (idp->saveent.d_namlen) {
438 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
439 return (error);
440 idp->saveent.d_namlen = 0;
441 }
442 }
443 }
444 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
445 if (assoc) {
446 idp->assocoff = idp->curroff;
447 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
448 } else {
449 idp->saveoff = idp->curroff;
450 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
451 }
452 return (0);
453 }
454
455 /*
456 * Vnode op for readdir
457 */
458 static int
459 cd9660_readdir(ap)
460 struct vop_readdir_args /* {
461 struct vnode *a_vp;
462 struct uio *a_uio;
463 struct ucred *a_cred;
464 int *a_eofflag;
465 int *a_ncookies;
466 u_long **a_cookies;
467 } */ *ap;
468 {
469 struct uio *uio = ap->a_uio;
470 struct isoreaddir *idp;
471 struct vnode *vdp = ap->a_vp;
472 struct iso_node *dp;
473 struct iso_mnt *imp;
474 struct buf *bp = NULL;
475 struct iso_directory_record *ep;
476 int entryoffsetinblock;
477 doff_t endsearch;
478 u_long bmask;
479 int error = 0;
480 int reclen;
481 u_short namelen;
482 int ncookies = 0;
483 u_long *cookies = NULL;
484
485 dp = VTOI(vdp);
486 imp = dp->i_mnt;
487 bmask = imp->im_bmask;
488
489 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
490 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
491 /*
492 * XXX
493 * Is it worth trying to figure out the type?
494 */
495 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
496 DT_UNKNOWN;
497 idp->uio = uio;
498 if (ap->a_ncookies == NULL) {
499 idp->cookies = NULL;
500 } else {
501 /*
502 * Guess the number of cookies needed.
503 */
504 ncookies = uio->uio_resid / 16;
505 cookies = malloc(ncookies * sizeof(u_long),
506 M_TEMP, M_WAITOK);
507 idp->cookies = cookies;
508 idp->ncookies = ncookies;
509 }
510 idp->eofflag = 1;
511 idp->curroff = uio->uio_offset;
512 idp->uio_off = uio->uio_offset;
513
514 if ((entryoffsetinblock = idp->curroff & bmask) &&
515 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
516 free(idp, M_TEMP);
517 return (error);
518 }
519 endsearch = dp->i_size;
520
521 while (idp->curroff < endsearch) {
522 /*
523 * If offset is on a block boundary,
524 * read the next directory block.
525 * Release previous if it exists.
526 */
527 if ((idp->curroff & bmask) == 0) {
528 if (bp != NULL)
529 brelse(bp);
530 if ((error =
531 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
532 break;
533 entryoffsetinblock = 0;
534 }
535 /*
536 * Get pointer to next entry.
537 */
538 ep = (struct iso_directory_record *)
539 ((char *)bp->b_data + entryoffsetinblock);
540
541 reclen = isonum_711(ep->length);
542 if (reclen == 0) {
543 /* skip to next block, if any */
544 idp->curroff =
545 (idp->curroff & ~bmask) + imp->logical_block_size;
546 continue;
547 }
548
549 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
550 error = EINVAL;
551 /* illegal entry, stop */
552 break;
553 }
554
555 if (entryoffsetinblock + reclen > imp->logical_block_size) {
556 error = EINVAL;
557 /* illegal directory, so stop looking */
558 break;
559 }
560
561 idp->current.d_namlen = isonum_711(ep->name_len);
562
563 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
564 error = EINVAL;
565 /* illegal entry, stop */
566 break;
567 }
568
569 if (isonum_711(ep->flags)&2)
570 idp->current.d_fileno = isodirino(ep, imp);
571 else
572 idp->current.d_fileno = dbtob(bp->b_blkno) +
573 entryoffsetinblock;
574
575 idp->curroff += reclen;
576
577 switch (imp->iso_ftype) {
578 case ISO_FTYPE_RRIP:
579 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
580 &idp->current.d_fileno,imp);
581 idp->current.d_namlen = (u_char)namelen;
582 if (idp->current.d_namlen)
583 error = iso_uiodir(idp,&idp->current,idp->curroff);
584 break;
585 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
586 strcpy(idp->current.d_name,"..");
587 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
588 idp->current.d_namlen = 1;
589 error = iso_uiodir(idp,&idp->current,idp->curroff);
590 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
591 idp->current.d_namlen = 2;
592 error = iso_uiodir(idp,&idp->current,idp->curroff);
593 } else {
594 isofntrans(ep->name,idp->current.d_namlen,
595 idp->current.d_name, &namelen,
596 imp->iso_ftype == ISO_FTYPE_9660,
597 isonum_711(ep->flags)&4,
598 imp->joliet_level,
599 imp->im_flags,
600 imp->im_d2l);
601 idp->current.d_namlen = (u_char)namelen;
602 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
603 error = iso_shipdir(idp);
604 else
605 error = iso_uiodir(idp,&idp->current,idp->curroff);
606 }
607 }
608 if (error)
609 break;
610
611 entryoffsetinblock += reclen;
612 }
613
614 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
615 idp->current.d_namlen = 0;
616 error = iso_shipdir(idp);
617 }
618 if (error < 0)
619 error = 0;
620
621 if (ap->a_ncookies != NULL) {
622 if (error)
623 free(cookies, M_TEMP);
624 else {
625 /*
626 * Work out the number of cookies actually used.
627 */
628 *ap->a_ncookies = ncookies - idp->ncookies;
629 *ap->a_cookies = cookies;
630 }
631 }
632
633 if (bp)
634 brelse (bp);
635
636 uio->uio_offset = idp->uio_off;
637 *ap->a_eofflag = idp->eofflag;
638
639 free(idp, M_TEMP);
640
641 return (error);
642 }
643
644 /*
645 * Return target name of a symbolic link
646 * Shouldn't we get the parent vnode and read the data from there?
647 * This could eventually result in deadlocks in cd9660_lookup.
648 * But otherwise the block read here is in the block buffer two times.
649 */
650 typedef struct iso_directory_record ISODIR;
651 typedef struct iso_node ISONODE;
652 typedef struct iso_mnt ISOMNT;
653 static int
654 cd9660_readlink(ap)
655 struct vop_readlink_args /* {
656 struct vnode *a_vp;
657 struct uio *a_uio;
658 struct ucred *a_cred;
659 } */ *ap;
660 {
661 ISONODE *ip;
662 ISODIR *dirp;
663 ISOMNT *imp;
664 struct buf *bp;
665 struct uio *uio;
666 u_short symlen;
667 int error;
668 char *symname;
669
670 ip = VTOI(ap->a_vp);
671 imp = ip->i_mnt;
672 uio = ap->a_uio;
673
674 if (imp->iso_ftype != ISO_FTYPE_RRIP)
675 return (EINVAL);
676
677 /*
678 * Get parents directory record block that this inode included.
679 */
680 error = bread(imp->im_devvp,
681 (ip->i_number >> imp->im_bshift) <<
682 (imp->im_bshift - DEV_BSHIFT),
683 imp->logical_block_size, NOCRED, &bp);
684 if (error) {
685 brelse(bp);
686 return (EINVAL);
687 }
688
689 /*
690 * Setup the directory pointer for this inode
691 */
692 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
693
694 /*
695 * Just make sure, we have a right one....
696 * 1: Check not cross boundary on block
697 */
698 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
699 > (unsigned)imp->logical_block_size) {
700 brelse(bp);
701 return (EINVAL);
702 }
703
704 /*
705 * Now get a buffer
706 * Abuse a namei buffer for now.
707 */
708 if (uio->uio_segflg == UIO_SYSSPACE)
709 symname = uio->uio_iov->iov_base;
710 else
711 symname = uma_zalloc(namei_zone, M_WAITOK);
712
713 /*
714 * Ok, we just gathering a symbolic name in SL record.
715 */
716 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
717 if (uio->uio_segflg != UIO_SYSSPACE)
718 uma_zfree(namei_zone, symname);
719 brelse(bp);
720 return (EINVAL);
721 }
722 /*
723 * Don't forget before you leave from home ;-)
724 */
725 brelse(bp);
726
727 /*
728 * return with the symbolic name to caller's.
729 */
730 if (uio->uio_segflg != UIO_SYSSPACE) {
731 error = uiomove(symname, symlen, uio);
732 uma_zfree(namei_zone, symname);
733 return (error);
734 }
735 uio->uio_resid -= symlen;
736 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
737 uio->uio_iov->iov_len -= symlen;
738 return (0);
739 }
740
741 /*
742 * Calculate the logical to physical mapping if not done already,
743 * then call the device strategy routine.
744 */
745 static int
746 cd9660_strategy(ap)
747 struct vop_strategy_args /* {
748 struct buf *a_vp;
749 struct buf *a_bp;
750 } */ *ap;
751 {
752 struct buf *bp = ap->a_bp;
753 struct vnode *vp = ap->a_vp;
754 struct iso_node *ip;
755 struct bufobj *bo;
756
757 ip = VTOI(vp);
758 if (vp->v_type == VBLK || vp->v_type == VCHR)
759 panic("cd9660_strategy: spec");
760 if (bp->b_blkno == bp->b_lblkno) {
761 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
762 (ip->i_mnt->im_bshift - DEV_BSHIFT);
763 }
764 bp->b_iooffset = dbtob(bp->b_blkno);
765 bo = ip->i_mnt->im_bo;
766 BO_STRATEGY(bo, bp);
767 return (0);
768 }
769
770 /*
771 * Return POSIX pathconf information applicable to cd9660 filesystems.
772 */
773 static int
774 cd9660_pathconf(ap)
775 struct vop_pathconf_args /* {
776 struct vnode *a_vp;
777 int a_name;
778 register_t *a_retval;
779 } */ *ap;
780 {
781
782 switch (ap->a_name) {
783 case _PC_LINK_MAX:
784 *ap->a_retval = 1;
785 return (0);
786 case _PC_NAME_MAX:
787 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
788 *ap->a_retval = NAME_MAX;
789 else
790 *ap->a_retval = 37;
791 return (0);
792 case _PC_PATH_MAX:
793 *ap->a_retval = PATH_MAX;
794 return (0);
795 case _PC_PIPE_BUF:
796 *ap->a_retval = PIPE_BUF;
797 return (0);
798 case _PC_CHOWN_RESTRICTED:
799 *ap->a_retval = 1;
800 return (0);
801 case _PC_NO_TRUNC:
802 *ap->a_retval = 1;
803 return (0);
804 default:
805 return (EINVAL);
806 }
807 /* NOTREACHED */
808 }
809
810 /*
811 * Vnode pointer to File handle
812 */
813 static int
814 cd9660_vptofh(ap)
815 struct vop_vptofh_args /* {
816 struct vnode *a_vp;
817 struct fid *a_fhp;
818 } */ *ap;
819 {
820 struct ifid ifh;
821 struct iso_node *ip = VTOI(ap->a_vp);
822
823 ifh.ifid_len = sizeof(struct ifid);
824
825 ifh.ifid_ino = ip->i_number;
826 ifh.ifid_start = ip->iso_start;
827 /*
828 * This intentionally uses sizeof(ifh) in order to not copy stack
829 * garbage on ILP32.
830 */
831 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
832
833 #ifdef ISOFS_DBG
834 printf("vptofh: ino %d, start %ld\n",
835 ifh.ifid_ino, ifh.ifid_start);
836 #endif
837
838 return (0);
839 }
840
841 /*
842 * Global vfs data structures for cd9660
843 */
844 struct vop_vector cd9660_vnodeops = {
845 .vop_default = &default_vnodeops,
846 .vop_open = cd9660_open,
847 .vop_access = cd9660_access,
848 .vop_bmap = cd9660_bmap,
849 .vop_cachedlookup = cd9660_lookup,
850 .vop_getattr = cd9660_getattr,
851 .vop_inactive = cd9660_inactive,
852 .vop_ioctl = cd9660_ioctl,
853 .vop_lookup = vfs_cache_lookup,
854 .vop_pathconf = cd9660_pathconf,
855 .vop_read = cd9660_read,
856 .vop_readdir = cd9660_readdir,
857 .vop_readlink = cd9660_readlink,
858 .vop_reclaim = cd9660_reclaim,
859 .vop_setattr = cd9660_setattr,
860 .vop_strategy = cd9660_strategy,
861 .vop_vptofh = cd9660_vptofh,
862 };
863
864 /*
865 * Special device vnode ops
866 */
867
868 struct vop_vector cd9660_fifoops = {
869 .vop_default = &fifo_specops,
870 .vop_access = cd9660_access,
871 .vop_getattr = cd9660_getattr,
872 .vop_inactive = cd9660_inactive,
873 .vop_reclaim = cd9660_reclaim,
874 .vop_setattr = cd9660_setattr,
875 .vop_vptofh = cd9660_vptofh,
876 };
Cache object: d1674e82148b572eefc99fa7e72b4e7d
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