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/9.0/sys/fs/cd9660/cd9660_vnops.c 202903 2010-01-23 22:38:01Z marius $");
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 <fs/cd9660/iso.h>
61 #include <fs/cd9660/cd9660_node.h>
62 #include <fs/cd9660/iso_rrip.h>
63
64 static vop_setattr_t cd9660_setattr;
65 static vop_open_t cd9660_open;
66 static vop_access_t cd9660_access;
67 static vop_getattr_t cd9660_getattr;
68 static vop_ioctl_t cd9660_ioctl;
69 static vop_pathconf_t cd9660_pathconf;
70 static vop_read_t cd9660_read;
71 struct isoreaddir;
72 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
73 static int iso_shipdir(struct isoreaddir *idp);
74 static vop_readdir_t cd9660_readdir;
75 static vop_readlink_t cd9660_readlink;
76 static vop_strategy_t cd9660_strategy;
77 static vop_vptofh_t cd9660_vptofh;
78
79 /*
80 * Setattr call. Only allowed for block and character special devices.
81 */
82 static int
83 cd9660_setattr(ap)
84 struct vop_setattr_args /* {
85 struct vnodeop_desc *a_desc;
86 struct vnode *a_vp;
87 struct vattr *a_vap;
88 struct ucred *a_cred;
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 */
124 static int
125 cd9660_access(ap)
126 struct vop_access_args /* {
127 struct vnode *a_vp;
128 accmode_t a_accmode;
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 accmode_t accmode = ap->a_accmode;
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 (accmode & 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_accmode, ap->a_cred, NULL));
159 }
160
161 static int
162 cd9660_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 struct file *a_fp;
169 } */ *ap;
170 {
171 struct vnode *vp = ap->a_vp;
172 struct iso_node *ip = VTOI(vp);
173
174 if (vp->v_type == VCHR || vp->v_type == VBLK)
175 return (EOPNOTSUPP);
176
177 vnode_create_vobject(vp, ip->i_size, ap->a_td);
178 return (0);
179 }
180
181
182 static int
183 cd9660_getattr(ap)
184 struct vop_getattr_args /* {
185 struct vnode *a_vp;
186 struct vattr *a_vap;
187 struct ucred *a_cred;
188 } */ *ap;
189
190 {
191 struct vnode *vp = ap->a_vp;
192 struct vattr *vap = ap->a_vap;
193 struct iso_node *ip = VTOI(vp);
194
195 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
196 vap->va_fileid = ip->i_number;
197
198 vap->va_mode = ip->inode.iso_mode;
199 vap->va_nlink = ip->inode.iso_links;
200 vap->va_uid = ip->inode.iso_uid;
201 vap->va_gid = ip->inode.iso_gid;
202 vap->va_atime = ip->inode.iso_atime;
203 vap->va_mtime = ip->inode.iso_mtime;
204 vap->va_ctime = ip->inode.iso_ctime;
205 vap->va_rdev = ip->inode.iso_rdev;
206
207 vap->va_size = (u_quad_t) ip->i_size;
208 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
209 struct vop_readlink_args rdlnk;
210 struct iovec aiov;
211 struct uio auio;
212 char *cp;
213
214 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
215 aiov.iov_base = cp;
216 aiov.iov_len = MAXPATHLEN;
217 auio.uio_iov = &aiov;
218 auio.uio_iovcnt = 1;
219 auio.uio_offset = 0;
220 auio.uio_rw = UIO_READ;
221 auio.uio_segflg = UIO_SYSSPACE;
222 auio.uio_td = curthread;
223 auio.uio_resid = MAXPATHLEN;
224 rdlnk.a_uio = &auio;
225 rdlnk.a_vp = ap->a_vp;
226 rdlnk.a_cred = ap->a_cred;
227 if (cd9660_readlink(&rdlnk) == 0)
228 vap->va_size = MAXPATHLEN - auio.uio_resid;
229 free(cp, M_TEMP);
230 }
231 vap->va_flags = 0;
232 vap->va_gen = 1;
233 vap->va_blocksize = ip->i_mnt->logical_block_size;
234 vap->va_bytes = (u_quad_t) ip->i_size;
235 vap->va_type = vp->v_type;
236 vap->va_filerev = 0;
237 return (0);
238 }
239
240 /*
241 * Vnode op for ioctl.
242 */
243 static int
244 cd9660_ioctl(ap)
245 struct vop_ioctl_args /* {
246 struct vnode *a_vp;
247 u_long a_command;
248 caddr_t a_data;
249 int a_fflag;
250 struct ucred *a_cred;
251 struct thread *a_td;
252 } */ *ap;
253 {
254 struct vnode *vp;
255 struct iso_node *ip;
256 int error;
257
258 vp = ap->a_vp;
259 vn_lock(vp, LK_SHARED | LK_RETRY);
260 if (vp->v_iflag & VI_DOOMED) {
261 VOP_UNLOCK(vp, 0);
262 return (EBADF);
263 }
264 if (vp->v_type == VCHR || vp->v_type == VBLK) {
265 VOP_UNLOCK(vp, 0);
266 return (EOPNOTSUPP);
267 }
268
269 ip = VTOI(vp);
270 error = 0;
271
272 switch (ap->a_command) {
273 case FIOGETLBA:
274 *(int *)(ap->a_data) = ip->iso_start;
275 break;
276 default:
277 error = ENOTTY;
278 break;
279 }
280
281 VOP_UNLOCK(vp, 0);
282 return (error);
283 }
284
285 /*
286 * Vnode op for reading.
287 */
288 static int
289 cd9660_read(ap)
290 struct vop_read_args /* {
291 struct vnode *a_vp;
292 struct uio *a_uio;
293 int a_ioflag;
294 struct ucred *a_cred;
295 } */ *ap;
296 {
297 struct vnode *vp = ap->a_vp;
298 struct uio *uio = ap->a_uio;
299 struct iso_node *ip = VTOI(vp);
300 struct iso_mnt *imp;
301 struct buf *bp;
302 daddr_t lbn, rablock;
303 off_t diff;
304 int rasize, error = 0;
305 int seqcount;
306 long size, n, on;
307
308 if (vp->v_type == VCHR || vp->v_type == VBLK)
309 return (EOPNOTSUPP);
310
311 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
312
313 if (uio->uio_resid == 0)
314 return (0);
315 if (uio->uio_offset < 0)
316 return (EINVAL);
317 imp = ip->i_mnt;
318 do {
319 lbn = lblkno(imp, uio->uio_offset);
320 on = blkoff(imp, uio->uio_offset);
321 n = min((u_int)(imp->logical_block_size - on),
322 uio->uio_resid);
323 diff = (off_t)ip->i_size - uio->uio_offset;
324 if (diff <= 0)
325 return (0);
326 if (diff < n)
327 n = diff;
328 size = blksize(imp, ip, lbn);
329 rablock = lbn + 1;
330 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
331 if (lblktosize(imp, rablock) < ip->i_size)
332 error = cluster_read(vp, (off_t)ip->i_size,
333 lbn, size, NOCRED, uio->uio_resid,
334 (ap->a_ioflag >> 16), &bp);
335 else
336 error = bread(vp, lbn, size, NOCRED, &bp);
337 } else {
338 if (seqcount > 1 &&
339 lblktosize(imp, rablock) < ip->i_size) {
340 rasize = blksize(imp, ip, rablock);
341 error = breadn(vp, lbn, size, &rablock,
342 &rasize, 1, NOCRED, &bp);
343 } else
344 error = bread(vp, lbn, size, NOCRED, &bp);
345 }
346 n = min(n, size - bp->b_resid);
347 if (error) {
348 brelse(bp);
349 return (error);
350 }
351
352 error = uiomove(bp->b_data + on, (int)n, uio);
353 brelse(bp);
354 } while (error == 0 && uio->uio_resid > 0 && n != 0);
355 return (error);
356 }
357
358 /*
359 * Structure for reading directories
360 */
361 struct isoreaddir {
362 struct dirent saveent;
363 struct dirent assocent;
364 struct dirent current;
365 off_t saveoff;
366 off_t assocoff;
367 off_t curroff;
368 struct uio *uio;
369 off_t uio_off;
370 int eofflag;
371 u_long *cookies;
372 int ncookies;
373 };
374
375 static int
376 iso_uiodir(idp,dp,off)
377 struct isoreaddir *idp;
378 struct dirent *dp;
379 off_t off;
380 {
381 int error;
382
383 dp->d_name[dp->d_namlen] = 0;
384 dp->d_reclen = GENERIC_DIRSIZ(dp);
385
386 if (idp->uio->uio_resid < dp->d_reclen) {
387 idp->eofflag = 0;
388 return (-1);
389 }
390
391 if (idp->cookies) {
392 if (idp->ncookies <= 0) {
393 idp->eofflag = 0;
394 return (-1);
395 }
396
397 *idp->cookies++ = off;
398 --idp->ncookies;
399 }
400
401 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
402 return (error);
403 idp->uio_off = off;
404 return (0);
405 }
406
407 static int
408 iso_shipdir(idp)
409 struct isoreaddir *idp;
410 {
411 struct dirent *dp;
412 int cl, sl, assoc;
413 int error;
414 char *cname, *sname;
415
416 cl = idp->current.d_namlen;
417 cname = idp->current.d_name;
418 assoc = (cl > 1) && (*cname == ASSOCCHAR);
419 if (assoc) {
420 cl--;
421 cname++;
422 }
423
424 dp = &idp->saveent;
425 sname = dp->d_name;
426 if (!(sl = dp->d_namlen)) {
427 dp = &idp->assocent;
428 sname = dp->d_name + 1;
429 sl = dp->d_namlen - 1;
430 }
431 if (sl > 0) {
432 if (sl != cl
433 || bcmp(sname,cname,sl)) {
434 if (idp->assocent.d_namlen) {
435 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
436 return (error);
437 idp->assocent.d_namlen = 0;
438 }
439 if (idp->saveent.d_namlen) {
440 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
441 return (error);
442 idp->saveent.d_namlen = 0;
443 }
444 }
445 }
446 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
447 if (assoc) {
448 idp->assocoff = idp->curroff;
449 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
450 } else {
451 idp->saveoff = idp->curroff;
452 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
453 }
454 return (0);
455 }
456
457 /*
458 * Vnode op for readdir
459 */
460 static int
461 cd9660_readdir(ap)
462 struct vop_readdir_args /* {
463 struct vnode *a_vp;
464 struct uio *a_uio;
465 struct ucred *a_cred;
466 int *a_eofflag;
467 int *a_ncookies;
468 u_long **a_cookies;
469 } */ *ap;
470 {
471 struct uio *uio = ap->a_uio;
472 struct isoreaddir *idp;
473 struct vnode *vdp = ap->a_vp;
474 struct iso_node *dp;
475 struct iso_mnt *imp;
476 struct buf *bp = NULL;
477 struct iso_directory_record *ep;
478 int entryoffsetinblock;
479 doff_t endsearch;
480 u_long bmask;
481 int error = 0;
482 int reclen;
483 u_short namelen;
484 int ncookies = 0;
485 u_long *cookies = NULL;
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
579 switch (imp->iso_ftype) {
580 case ISO_FTYPE_RRIP:
581 cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
582 &idp->current.d_fileno,imp);
583 idp->current.d_namlen = (u_char)namelen;
584 if (idp->current.d_namlen)
585 error = iso_uiodir(idp,&idp->current,idp->curroff);
586 break;
587 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
588 strcpy(idp->current.d_name,"..");
589 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
590 idp->current.d_namlen = 1;
591 error = iso_uiodir(idp,&idp->current,idp->curroff);
592 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
593 idp->current.d_namlen = 2;
594 error = iso_uiodir(idp,&idp->current,idp->curroff);
595 } else {
596 isofntrans(ep->name,idp->current.d_namlen,
597 idp->current.d_name, &namelen,
598 imp->iso_ftype == ISO_FTYPE_9660,
599 isonum_711(ep->flags)&4,
600 imp->joliet_level,
601 imp->im_flags,
602 imp->im_d2l);
603 idp->current.d_namlen = (u_char)namelen;
604 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
605 error = iso_shipdir(idp);
606 else
607 error = iso_uiodir(idp,&idp->current,idp->curroff);
608 }
609 }
610 if (error)
611 break;
612
613 entryoffsetinblock += reclen;
614 }
615
616 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
617 idp->current.d_namlen = 0;
618 error = iso_shipdir(idp);
619 }
620 if (error < 0)
621 error = 0;
622
623 if (ap->a_ncookies != NULL) {
624 if (error)
625 free(cookies, M_TEMP);
626 else {
627 /*
628 * Work out the number of cookies actually used.
629 */
630 *ap->a_ncookies = ncookies - idp->ncookies;
631 *ap->a_cookies = cookies;
632 }
633 }
634
635 if (bp)
636 brelse (bp);
637
638 uio->uio_offset = idp->uio_off;
639 *ap->a_eofflag = idp->eofflag;
640
641 free(idp, M_TEMP);
642
643 return (error);
644 }
645
646 /*
647 * Return target name of a symbolic link
648 * Shouldn't we get the parent vnode and read the data from there?
649 * This could eventually result in deadlocks in cd9660_lookup.
650 * But otherwise the block read here is in the block buffer two times.
651 */
652 typedef struct iso_directory_record ISODIR;
653 typedef struct iso_node ISONODE;
654 typedef struct iso_mnt ISOMNT;
655 static int
656 cd9660_readlink(ap)
657 struct vop_readlink_args /* {
658 struct vnode *a_vp;
659 struct uio *a_uio;
660 struct ucred *a_cred;
661 } */ *ap;
662 {
663 ISONODE *ip;
664 ISODIR *dirp;
665 ISOMNT *imp;
666 struct buf *bp;
667 struct uio *uio;
668 u_short symlen;
669 int error;
670 char *symname;
671
672 ip = VTOI(ap->a_vp);
673 imp = ip->i_mnt;
674 uio = ap->a_uio;
675
676 if (imp->iso_ftype != ISO_FTYPE_RRIP)
677 return (EINVAL);
678
679 /*
680 * Get parents directory record block that this inode included.
681 */
682 error = bread(imp->im_devvp,
683 (ip->i_number >> imp->im_bshift) <<
684 (imp->im_bshift - DEV_BSHIFT),
685 imp->logical_block_size, NOCRED, &bp);
686 if (error) {
687 brelse(bp);
688 return (EINVAL);
689 }
690
691 /*
692 * Setup the directory pointer for this inode
693 */
694 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
695
696 /*
697 * Just make sure, we have a right one....
698 * 1: Check not cross boundary on block
699 */
700 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
701 > (unsigned)imp->logical_block_size) {
702 brelse(bp);
703 return (EINVAL);
704 }
705
706 /*
707 * Now get a buffer
708 * Abuse a namei buffer for now.
709 */
710 if (uio->uio_segflg == UIO_SYSSPACE)
711 symname = uio->uio_iov->iov_base;
712 else
713 symname = uma_zalloc(namei_zone, M_WAITOK);
714
715 /*
716 * Ok, we just gathering a symbolic name in SL record.
717 */
718 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
719 if (uio->uio_segflg != UIO_SYSSPACE)
720 uma_zfree(namei_zone, symname);
721 brelse(bp);
722 return (EINVAL);
723 }
724 /*
725 * Don't forget before you leave from home ;-)
726 */
727 brelse(bp);
728
729 /*
730 * return with the symbolic name to caller's.
731 */
732 if (uio->uio_segflg != UIO_SYSSPACE) {
733 error = uiomove(symname, symlen, uio);
734 uma_zfree(namei_zone, symname);
735 return (error);
736 }
737 uio->uio_resid -= symlen;
738 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
739 uio->uio_iov->iov_len -= symlen;
740 return (0);
741 }
742
743 /*
744 * Calculate the logical to physical mapping if not done already,
745 * then call the device strategy routine.
746 */
747 static int
748 cd9660_strategy(ap)
749 struct vop_strategy_args /* {
750 struct buf *a_vp;
751 struct buf *a_bp;
752 } */ *ap;
753 {
754 struct buf *bp = ap->a_bp;
755 struct vnode *vp = ap->a_vp;
756 struct iso_node *ip;
757 struct bufobj *bo;
758
759 ip = VTOI(vp);
760 if (vp->v_type == VBLK || vp->v_type == VCHR)
761 panic("cd9660_strategy: spec");
762 if (bp->b_blkno == bp->b_lblkno) {
763 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
764 (ip->i_mnt->im_bshift - DEV_BSHIFT);
765 }
766 bp->b_iooffset = dbtob(bp->b_blkno);
767 bo = ip->i_mnt->im_bo;
768 BO_STRATEGY(bo, bp);
769 return (0);
770 }
771
772 /*
773 * Return POSIX pathconf information applicable to cd9660 filesystems.
774 */
775 static int
776 cd9660_pathconf(ap)
777 struct vop_pathconf_args /* {
778 struct vnode *a_vp;
779 int a_name;
780 register_t *a_retval;
781 } */ *ap;
782 {
783
784 switch (ap->a_name) {
785 case _PC_LINK_MAX:
786 *ap->a_retval = 1;
787 return (0);
788 case _PC_NAME_MAX:
789 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
790 *ap->a_retval = NAME_MAX;
791 else
792 *ap->a_retval = 37;
793 return (0);
794 case _PC_PATH_MAX:
795 *ap->a_retval = PATH_MAX;
796 return (0);
797 case _PC_PIPE_BUF:
798 *ap->a_retval = PIPE_BUF;
799 return (0);
800 case _PC_CHOWN_RESTRICTED:
801 *ap->a_retval = 1;
802 return (0);
803 case _PC_NO_TRUNC:
804 *ap->a_retval = 1;
805 return (0);
806 default:
807 return (EINVAL);
808 }
809 /* NOTREACHED */
810 }
811
812 /*
813 * Vnode pointer to File handle
814 */
815 static int
816 cd9660_vptofh(ap)
817 struct vop_vptofh_args /* {
818 struct vnode *a_vp;
819 struct fid *a_fhp;
820 } */ *ap;
821 {
822 struct ifid ifh;
823 struct iso_node *ip = VTOI(ap->a_vp);
824
825 ifh.ifid_len = sizeof(struct ifid);
826
827 ifh.ifid_ino = ip->i_number;
828 ifh.ifid_start = ip->iso_start;
829 /*
830 * This intentionally uses sizeof(ifh) in order to not copy stack
831 * garbage on ILP32.
832 */
833 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
834
835 #ifdef ISOFS_DBG
836 printf("vptofh: ino %d, start %ld\n",
837 ifh.ifid_ino, ifh.ifid_start);
838 #endif
839
840 return (0);
841 }
842
843 /*
844 * Global vfs data structures for cd9660
845 */
846 struct vop_vector cd9660_vnodeops = {
847 .vop_default = &default_vnodeops,
848 .vop_open = cd9660_open,
849 .vop_access = cd9660_access,
850 .vop_bmap = cd9660_bmap,
851 .vop_cachedlookup = cd9660_lookup,
852 .vop_getattr = cd9660_getattr,
853 .vop_inactive = cd9660_inactive,
854 .vop_ioctl = cd9660_ioctl,
855 .vop_lookup = vfs_cache_lookup,
856 .vop_pathconf = cd9660_pathconf,
857 .vop_read = cd9660_read,
858 .vop_readdir = cd9660_readdir,
859 .vop_readlink = cd9660_readlink,
860 .vop_reclaim = cd9660_reclaim,
861 .vop_setattr = cd9660_setattr,
862 .vop_strategy = cd9660_strategy,
863 .vop_vptofh = cd9660_vptofh,
864 };
865
866 /*
867 * Special device vnode ops
868 */
869
870 struct vop_vector cd9660_fifoops = {
871 .vop_default = &fifo_specops,
872 .vop_access = cd9660_access,
873 .vop_getattr = cd9660_getattr,
874 .vop_inactive = cd9660_inactive,
875 .vop_reclaim = cd9660_reclaim,
876 .vop_setattr = cd9660_setattr,
877 .vop_vptofh = cd9660_vptofh,
878 };
Cache object: 5341296d26150872285448d9699a7bcb
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