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
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/namei.h>
40 #include <sys/kernel.h>
41 #include <sys/conf.h>
42 #include <sys/stat.h>
43 #include <sys/bio.h>
44 #include <sys/buf.h>
45 #include <sys/mount.h>
46 #include <sys/vnode.h>
47 #include <sys/malloc.h>
48 #include <sys/dirent.h>
49 #include <sys/unistd.h>
50 #include <sys/filio.h>
51 #include <sys/sysctl.h>
52
53 #include <vm/vm.h>
54 #include <vm/vnode_pager.h>
55 #include <vm/uma.h>
56
57 #include <fs/cd9660/iso.h>
58 #include <fs/cd9660/cd9660_node.h>
59 #include <fs/cd9660/cd9660_mount.h>
60 #include <fs/cd9660/iso_rrip.h>
61
62 static vop_setattr_t cd9660_setattr;
63 static vop_open_t cd9660_open;
64 static vop_access_t cd9660_access;
65 static vop_getattr_t cd9660_getattr;
66 static vop_ioctl_t cd9660_ioctl;
67 static vop_pathconf_t cd9660_pathconf;
68 static vop_read_t cd9660_read;
69 struct isoreaddir;
70 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
71 static int iso_shipdir(struct isoreaddir *idp);
72 static vop_readdir_t cd9660_readdir;
73 static vop_readlink_t cd9660_readlink;
74 static vop_strategy_t cd9660_strategy;
75 static vop_vptofh_t cd9660_vptofh;
76 static vop_getpages_t cd9660_getpages;
77
78 /*
79 * Setattr call. Only allowed for block and character special devices.
80 */
81 static int
cd9660_setattr(struct vop_setattr_args * ap)82 cd9660_setattr(struct vop_setattr_args *ap)
83 {
84 struct vnode *vp = ap->a_vp;
85 struct vattr *vap = ap->a_vap;
86
87 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
88 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
89 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
90 return (EROFS);
91 if (vap->va_size != (u_quad_t)VNOVAL) {
92 switch (vp->v_type) {
93 case VDIR:
94 return (EISDIR);
95 case VLNK:
96 case VREG:
97 return (EROFS);
98 case VCHR:
99 case VBLK:
100 case VSOCK:
101 case VFIFO:
102 case VNON:
103 case VBAD:
104 case VMARKER:
105 return (0);
106 }
107 }
108 return (0);
109 }
110
111 /*
112 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
113 * The mode is shifted to select the owner/group/other fields. The
114 * super user is granted all permissions.
115 */
116 /* ARGSUSED */
117 static int
cd9660_access(struct vop_access_args * ap)118 cd9660_access(struct vop_access_args *ap)
119 {
120 struct vnode *vp = ap->a_vp;
121 struct iso_node *ip = VTOI(vp);
122 accmode_t accmode = ap->a_accmode;
123 accmode_t file_mode;
124 uid_t uid;
125 gid_t gid;
126
127 if (vp->v_type == VCHR || vp->v_type == VBLK)
128 return (EOPNOTSUPP);
129
130 /*
131 * Disallow write attempts unless the file is a socket,
132 * fifo, or a block or character device resident on the
133 * filesystem.
134 */
135 if (accmode & VWRITE) {
136 switch (vp->v_type) {
137 case VDIR:
138 case VLNK:
139 case VREG:
140 return (EROFS);
141 /* NOT REACHED */
142 default:
143 break;
144 }
145 }
146
147 file_mode = ip->inode.iso_mode;
148 file_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask;
149
150 uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ?
151 ip->i_mnt->im_uid : ip->inode.iso_uid;
152 gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ?
153 ip->i_mnt->im_gid : ip->inode.iso_gid;
154
155 return (vaccess(vp->v_type, file_mode, uid,
156 gid, ap->a_accmode, ap->a_cred));
157 }
158
159 static int
cd9660_open(struct vop_open_args * ap)160 cd9660_open(struct vop_open_args *ap)
161 {
162 struct vnode *vp = ap->a_vp;
163 struct iso_node *ip = VTOI(vp);
164
165 if (vp->v_type == VCHR || vp->v_type == VBLK)
166 return (EOPNOTSUPP);
167
168 vnode_create_vobject(vp, ip->i_size, ap->a_td);
169 return (0);
170 }
171
172 static int
cd9660_getattr(struct vop_getattr_args * ap)173 cd9660_getattr(struct vop_getattr_args *ap)
174
175 {
176 struct vnode *vp = ap->a_vp;
177 struct vattr *vap = ap->a_vap;
178 struct iso_node *ip = VTOI(vp);
179
180 vap->va_fsid = dev2udev(ip->i_mnt->im_dev);
181 vap->va_fileid = ip->i_number;
182
183 vap->va_mode = ip->inode.iso_mode;
184 vap->va_mode &= (vp->v_type == VDIR) ? ip->i_mnt->im_dmask : ip->i_mnt->im_fmask;
185
186 vap->va_nlink = ip->inode.iso_links;
187 vap->va_uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ?
188 ip->i_mnt->im_uid : ip->inode.iso_uid;
189 vap->va_gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ?
190 ip->i_mnt->im_gid : ip->inode.iso_gid;
191 vap->va_atime = ip->inode.iso_atime;
192 vap->va_mtime = ip->inode.iso_mtime;
193 vap->va_ctime = ip->inode.iso_ctime;
194 vap->va_rdev = ip->inode.iso_rdev;
195
196 vap->va_size = (u_quad_t) ip->i_size;
197 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
198 struct vop_readlink_args rdlnk;
199 struct iovec aiov;
200 struct uio auio;
201 char *cp;
202
203 cp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
204 aiov.iov_base = cp;
205 aiov.iov_len = MAXPATHLEN;
206 auio.uio_iov = &aiov;
207 auio.uio_iovcnt = 1;
208 auio.uio_offset = 0;
209 auio.uio_rw = UIO_READ;
210 auio.uio_segflg = UIO_SYSSPACE;
211 auio.uio_td = curthread;
212 auio.uio_resid = MAXPATHLEN;
213 rdlnk.a_uio = &auio;
214 rdlnk.a_vp = ap->a_vp;
215 rdlnk.a_cred = ap->a_cred;
216 if (cd9660_readlink(&rdlnk) == 0)
217 vap->va_size = MAXPATHLEN - auio.uio_resid;
218 free(cp, M_TEMP);
219 }
220 vap->va_flags = 0;
221 vap->va_gen = 1;
222 vap->va_blocksize = ip->i_mnt->logical_block_size;
223 vap->va_bytes = (u_quad_t) ip->i_size;
224 vap->va_type = vp->v_type;
225 vap->va_filerev = 0;
226 return (0);
227 }
228
229 /*
230 * Vnode op for ioctl.
231 */
232 static int
cd9660_ioctl(struct vop_ioctl_args * ap)233 cd9660_ioctl(struct vop_ioctl_args *ap)
234 {
235 struct vnode *vp;
236 struct iso_node *ip;
237 int error;
238
239 vp = ap->a_vp;
240 vn_lock(vp, LK_SHARED | LK_RETRY);
241 if (VN_IS_DOOMED(vp)) {
242 VOP_UNLOCK(vp);
243 return (EBADF);
244 }
245 if (vp->v_type == VCHR || vp->v_type == VBLK) {
246 VOP_UNLOCK(vp);
247 return (EOPNOTSUPP);
248 }
249
250 ip = VTOI(vp);
251 error = 0;
252
253 switch (ap->a_command) {
254 case FIOGETLBA:
255 *(int *)(ap->a_data) = ip->iso_start;
256 break;
257 default:
258 error = ENOTTY;
259 break;
260 }
261
262 VOP_UNLOCK(vp);
263 return (error);
264 }
265
266 /*
267 * Vnode op for reading.
268 */
269 static int
cd9660_read(struct vop_read_args * ap)270 cd9660_read(struct vop_read_args *ap)
271 {
272 struct vnode *vp = ap->a_vp;
273 struct uio *uio = ap->a_uio;
274 struct iso_node *ip = VTOI(vp);
275 struct iso_mnt *imp;
276 struct buf *bp;
277 daddr_t lbn, rablock;
278 off_t diff;
279 int rasize, error = 0;
280 int seqcount;
281 long size, n, on;
282
283 if (vp->v_type == VCHR || vp->v_type == VBLK)
284 return (EOPNOTSUPP);
285
286 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
287
288 if (uio->uio_resid == 0)
289 return (0);
290 if (uio->uio_offset < 0)
291 return (EINVAL);
292 imp = ip->i_mnt;
293 do {
294 lbn = lblkno(imp, uio->uio_offset);
295 on = blkoff(imp, uio->uio_offset);
296 n = MIN(imp->logical_block_size - on, uio->uio_resid);
297 diff = (off_t)ip->i_size - uio->uio_offset;
298 if (diff <= 0)
299 return (0);
300 if (diff < n)
301 n = diff;
302 size = blksize(imp, ip, lbn);
303 rablock = lbn + 1;
304 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
305 if (lblktosize(imp, rablock) < ip->i_size)
306 error = cluster_read(vp, (off_t)ip->i_size,
307 lbn, size, NOCRED, uio->uio_resid,
308 (ap->a_ioflag >> 16), 0, &bp);
309 else
310 error = bread(vp, lbn, size, NOCRED, &bp);
311 } else {
312 if (seqcount > 1 &&
313 lblktosize(imp, rablock) < ip->i_size) {
314 rasize = blksize(imp, ip, rablock);
315 error = breadn(vp, lbn, size, &rablock,
316 &rasize, 1, NOCRED, &bp);
317 } else
318 error = bread(vp, lbn, size, NOCRED, &bp);
319 }
320 if (error != 0)
321 return (error);
322 n = MIN(n, size - bp->b_resid);
323
324 error = uiomove(bp->b_data + on, (int)n, uio);
325 brelse(bp);
326 } while (error == 0 && uio->uio_resid > 0 && n != 0);
327 return (error);
328 }
329
330 /*
331 * Structure for reading directories
332 */
333 struct isoreaddir {
334 struct dirent saveent;
335 struct dirent assocent;
336 struct dirent current;
337 off_t saveoff;
338 off_t assocoff;
339 off_t curroff;
340 struct uio *uio;
341 off_t uio_off;
342 int eofflag;
343 uint64_t *cookies;
344 int ncookies;
345 };
346
347 static int
iso_uiodir(struct isoreaddir * idp,struct dirent * dp,off_t off)348 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
349 {
350 int error;
351
352 dp->d_reclen = GENERIC_DIRSIZ(dp);
353 dirent_terminate(dp);
354
355 if (idp->uio->uio_resid < dp->d_reclen) {
356 idp->eofflag = 0;
357 return (-1);
358 }
359
360 if (idp->cookies) {
361 if (idp->ncookies <= 0) {
362 idp->eofflag = 0;
363 return (-1);
364 }
365
366 *idp->cookies++ = off;
367 --idp->ncookies;
368 }
369
370 if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
371 return (error);
372 idp->uio_off = off;
373 return (0);
374 }
375
376 static int
iso_shipdir(struct isoreaddir * idp)377 iso_shipdir(struct isoreaddir *idp)
378 {
379 struct dirent *dp;
380 int cl, sl, assoc;
381 int error;
382 char *cname, *sname;
383
384 cl = idp->current.d_namlen;
385 cname = idp->current.d_name;
386 assoc = (cl > 1) && (*cname == ASSOCCHAR);
387 if (assoc) {
388 cl--;
389 cname++;
390 }
391
392 dp = &idp->saveent;
393 sname = dp->d_name;
394 if (!(sl = dp->d_namlen)) {
395 dp = &idp->assocent;
396 sname = dp->d_name + 1;
397 sl = dp->d_namlen - 1;
398 }
399 if (sl > 0) {
400 if (sl != cl
401 || bcmp(sname,cname,sl)) {
402 if (idp->assocent.d_namlen) {
403 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0)
404 return (error);
405 idp->assocent.d_namlen = 0;
406 }
407 if (idp->saveent.d_namlen) {
408 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0)
409 return (error);
410 idp->saveent.d_namlen = 0;
411 }
412 }
413 }
414 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current);
415 if (assoc) {
416 idp->assocoff = idp->curroff;
417 memcpy(&idp->assocent, &idp->current, idp->current.d_reclen);
418 } else {
419 idp->saveoff = idp->curroff;
420 memcpy(&idp->saveent, &idp->current, idp->current.d_reclen);
421 }
422 return (0);
423 }
424
425 /*
426 * Vnode op for readdir
427 */
428 static int
cd9660_readdir(struct vop_readdir_args * ap)429 cd9660_readdir(struct vop_readdir_args *ap)
430 {
431 struct uio *uio = ap->a_uio;
432 struct isoreaddir *idp;
433 struct vnode *vdp = ap->a_vp;
434 struct iso_node *dp;
435 struct iso_mnt *imp;
436 struct buf *bp = NULL;
437 struct iso_directory_record *ep;
438 int entryoffsetinblock;
439 doff_t endsearch;
440 u_long bmask;
441 int error = 0;
442 int reclen;
443 u_short namelen;
444 u_int ncookies = 0;
445 uint64_t *cookies = NULL;
446 cd_ino_t ino;
447
448 dp = VTOI(vdp);
449 imp = dp->i_mnt;
450 bmask = imp->im_bmask;
451
452 idp = malloc(sizeof(*idp), M_TEMP, M_WAITOK);
453 idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
454 /*
455 * XXX
456 * Is it worth trying to figure out the type?
457 */
458 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
459 DT_UNKNOWN;
460 idp->uio = uio;
461 if (ap->a_ncookies == NULL) {
462 idp->cookies = NULL;
463 } else {
464 /*
465 * Guess the number of cookies needed.
466 */
467 ncookies = uio->uio_resid / 16;
468 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
469 idp->cookies = cookies;
470 idp->ncookies = ncookies;
471 }
472 idp->eofflag = 1;
473 idp->curroff = uio->uio_offset;
474 idp->uio_off = uio->uio_offset;
475
476 if ((entryoffsetinblock = idp->curroff & bmask) &&
477 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) {
478 free(idp, M_TEMP);
479 return (error);
480 }
481 endsearch = dp->i_size;
482
483 while (idp->curroff < endsearch) {
484 /*
485 * If offset is on a block boundary,
486 * read the next directory block.
487 * Release previous if it exists.
488 */
489 if ((idp->curroff & bmask) == 0) {
490 if (bp != NULL)
491 brelse(bp);
492 if ((error =
493 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0)
494 break;
495 entryoffsetinblock = 0;
496 }
497 /*
498 * Get pointer to next entry.
499 */
500 ep = (struct iso_directory_record *)
501 ((char *)bp->b_data + entryoffsetinblock);
502
503 reclen = isonum_711(ep->length);
504 if (reclen == 0) {
505 /* skip to next block, if any */
506 idp->curroff =
507 (idp->curroff & ~bmask) + imp->logical_block_size;
508 continue;
509 }
510
511 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
512 error = EINVAL;
513 /* illegal entry, stop */
514 break;
515 }
516
517 if (entryoffsetinblock + reclen > imp->logical_block_size) {
518 error = EINVAL;
519 /* illegal directory, so stop looking */
520 break;
521 }
522
523 idp->current.d_namlen = isonum_711(ep->name_len);
524
525 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
526 error = EINVAL;
527 /* illegal entry, stop */
528 break;
529 }
530
531 if (isonum_711(ep->flags)&2)
532 idp->current.d_fileno = isodirino(ep, imp);
533 else
534 idp->current.d_fileno = dbtob(bp->b_blkno) +
535 entryoffsetinblock;
536
537 idp->curroff += reclen;
538 /* NOTE: d_off is the offset of *next* entry. */
539 idp->current.d_off = idp->curroff;
540
541 switch (imp->iso_ftype) {
542 case ISO_FTYPE_RRIP:
543 ino = idp->current.d_fileno;
544 cd9660_rrip_getname(ep, idp->current.d_name, &namelen,
545 &ino, imp);
546 idp->current.d_fileno = ino;
547 idp->current.d_namlen = (u_char)namelen;
548 if (idp->current.d_namlen)
549 error = iso_uiodir(idp,&idp->current,idp->curroff);
550 break;
551 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
552 strcpy(idp->current.d_name,"..");
553 if (idp->current.d_namlen == 1 && ep->name[0] == 0) {
554 idp->current.d_namlen = 1;
555 error = iso_uiodir(idp,&idp->current,idp->curroff);
556 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) {
557 idp->current.d_namlen = 2;
558 error = iso_uiodir(idp,&idp->current,idp->curroff);
559 } else {
560 isofntrans(ep->name,idp->current.d_namlen,
561 idp->current.d_name, &namelen,
562 imp->iso_ftype == ISO_FTYPE_9660,
563 isonum_711(ep->flags)&4,
564 imp->joliet_level,
565 imp->im_flags,
566 imp->im_d2l);
567 idp->current.d_namlen = (u_char)namelen;
568 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
569 error = iso_shipdir(idp);
570 else
571 error = iso_uiodir(idp,&idp->current,idp->curroff);
572 }
573 }
574 if (error)
575 break;
576
577 entryoffsetinblock += reclen;
578 }
579
580 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
581 idp->current.d_namlen = 0;
582 error = iso_shipdir(idp);
583 }
584 if (error < 0)
585 error = 0;
586
587 if (ap->a_ncookies != NULL) {
588 if (error)
589 free(cookies, M_TEMP);
590 else {
591 /*
592 * Work out the number of cookies actually used.
593 */
594 *ap->a_ncookies = ncookies - idp->ncookies;
595 *ap->a_cookies = cookies;
596 }
597 }
598
599 if (bp)
600 brelse (bp);
601
602 uio->uio_offset = idp->uio_off;
603 *ap->a_eofflag = idp->eofflag;
604
605 free(idp, M_TEMP);
606
607 return (error);
608 }
609
610 /*
611 * Return target name of a symbolic link
612 * Shouldn't we get the parent vnode and read the data from there?
613 * This could eventually result in deadlocks in cd9660_lookup.
614 * But otherwise the block read here is in the block buffer two times.
615 */
616 typedef struct iso_directory_record ISODIR;
617 typedef struct iso_node ISONODE;
618 typedef struct iso_mnt ISOMNT;
619 static int
cd9660_readlink(struct vop_readlink_args * ap)620 cd9660_readlink(struct vop_readlink_args *ap)
621 {
622 ISONODE *ip;
623 ISODIR *dirp;
624 ISOMNT *imp;
625 struct buf *bp;
626 struct uio *uio;
627 u_short symlen;
628 int error;
629 char *symname;
630
631 ip = VTOI(ap->a_vp);
632 imp = ip->i_mnt;
633 uio = ap->a_uio;
634
635 if (imp->iso_ftype != ISO_FTYPE_RRIP)
636 return (EINVAL);
637
638 /*
639 * Get parents directory record block that this inode included.
640 */
641 error = bread(imp->im_devvp,
642 (ip->i_number >> imp->im_bshift) <<
643 (imp->im_bshift - DEV_BSHIFT),
644 imp->logical_block_size, NOCRED, &bp);
645 if (error) {
646 return (EINVAL);
647 }
648
649 /*
650 * Setup the directory pointer for this inode
651 */
652 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
653
654 /*
655 * Just make sure, we have a right one....
656 * 1: Check not cross boundary on block
657 */
658 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
659 > (unsigned)imp->logical_block_size) {
660 brelse(bp);
661 return (EINVAL);
662 }
663
664 /*
665 * Now get a buffer
666 * Abuse a namei buffer for now.
667 */
668 if (uio->uio_segflg == UIO_SYSSPACE)
669 symname = uio->uio_iov->iov_base;
670 else
671 symname = uma_zalloc(namei_zone, M_WAITOK);
672
673 /*
674 * Ok, we just gathering a symbolic name in SL record.
675 */
676 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
677 if (uio->uio_segflg != UIO_SYSSPACE)
678 uma_zfree(namei_zone, symname);
679 brelse(bp);
680 return (EINVAL);
681 }
682 /*
683 * Don't forget before you leave from home ;-)
684 */
685 brelse(bp);
686
687 /*
688 * return with the symbolic name to caller's.
689 */
690 if (uio->uio_segflg != UIO_SYSSPACE) {
691 error = uiomove(symname, symlen, uio);
692 uma_zfree(namei_zone, symname);
693 return (error);
694 }
695 uio->uio_resid -= symlen;
696 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
697 uio->uio_iov->iov_len -= symlen;
698 return (0);
699 }
700
701 /*
702 * Calculate the logical to physical mapping if not done already,
703 * then call the device strategy routine.
704 */
705 static int
cd9660_strategy(struct vop_strategy_args * ap)706 cd9660_strategy(struct vop_strategy_args *ap)
707 {
708 struct buf *bp = ap->a_bp;
709 struct vnode *vp = ap->a_vp;
710 struct iso_node *ip;
711 struct bufobj *bo;
712
713 ip = VTOI(vp);
714 if (vp->v_type == VBLK || vp->v_type == VCHR)
715 panic("cd9660_strategy: spec");
716 if (bp->b_blkno == bp->b_lblkno) {
717 bp->b_blkno = (ip->iso_start + bp->b_lblkno) <<
718 (ip->i_mnt->im_bshift - DEV_BSHIFT);
719 }
720 bp->b_iooffset = dbtob(bp->b_blkno);
721 bo = ip->i_mnt->im_bo;
722 BO_STRATEGY(bo, bp);
723 return (0);
724 }
725
726 /*
727 * Return POSIX pathconf information applicable to cd9660 filesystems.
728 */
729 static int
cd9660_pathconf(struct vop_pathconf_args * ap)730 cd9660_pathconf(struct vop_pathconf_args *ap)
731 {
732
733 switch (ap->a_name) {
734 case _PC_FILESIZEBITS:
735 *ap->a_retval = 32;
736 return (0);
737 case _PC_LINK_MAX:
738 *ap->a_retval = 1;
739 return (0);
740 case _PC_NAME_MAX:
741 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
742 *ap->a_retval = NAME_MAX;
743 else
744 *ap->a_retval = 37;
745 return (0);
746 case _PC_SYMLINK_MAX:
747 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) {
748 *ap->a_retval = MAXPATHLEN;
749 return (0);
750 }
751 return (EINVAL);
752 case _PC_NO_TRUNC:
753 *ap->a_retval = 1;
754 return (0);
755 default:
756 return (vop_stdpathconf(ap));
757 }
758 /* NOTREACHED */
759 }
760
761 /*
762 * Vnode pointer to File handle
763 */
764 static int
cd9660_vptofh(struct vop_vptofh_args * ap)765 cd9660_vptofh(struct vop_vptofh_args *ap)
766 {
767 struct ifid ifh;
768 struct iso_node *ip = VTOI(ap->a_vp);
769
770 ifh.ifid_len = sizeof(struct ifid);
771
772 ifh.ifid_ino = ip->i_number;
773 ifh.ifid_start = ip->iso_start;
774 /*
775 * This intentionally uses sizeof(ifh) in order to not copy stack
776 * garbage on ILP32.
777 */
778 memcpy(ap->a_fhp, &ifh, sizeof(ifh));
779
780 #ifdef ISOFS_DBG
781 printf("vptofh: ino %jd, start %ld\n",
782 (uintmax_t)ifh.ifid_ino, ifh.ifid_start);
783 #endif
784
785 return (0);
786 }
787
788 SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
789 "cd9660 filesystem");
790 static int use_buf_pager = 1;
791 SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN,
792 &use_buf_pager, 0,
793 "Use buffer pager instead of bmap");
794
795 static daddr_t
cd9660_gbp_getblkno(struct vnode * vp,vm_ooffset_t off)796 cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
797 {
798
799 return (lblkno(VTOI(vp)->i_mnt, off));
800 }
801
802 static int
cd9660_gbp_getblksz(struct vnode * vp,daddr_t lbn,long * sz)803 cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *sz)
804 {
805 struct iso_node *ip;
806
807 ip = VTOI(vp);
808 *sz = blksize(ip->i_mnt, ip, lbn);
809 return (0);
810 }
811
812 static int
cd9660_getpages(struct vop_getpages_args * ap)813 cd9660_getpages(struct vop_getpages_args *ap)
814 {
815 struct vnode *vp;
816
817 vp = ap->a_vp;
818 if (vp->v_type == VCHR || vp->v_type == VBLK)
819 return (EOPNOTSUPP);
820
821 if (use_buf_pager)
822 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count,
823 ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno,
824 cd9660_gbp_getblksz));
825 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
826 ap->a_rbehind, ap->a_rahead, NULL, NULL));
827 }
828
829 /*
830 * Global vfs data structures for cd9660
831 */
832 struct vop_vector cd9660_vnodeops = {
833 .vop_default = &default_vnodeops,
834 .vop_open = cd9660_open,
835 .vop_access = cd9660_access,
836 .vop_bmap = cd9660_bmap,
837 .vop_cachedlookup = cd9660_lookup,
838 .vop_getattr = cd9660_getattr,
839 .vop_inactive = cd9660_inactive,
840 .vop_ioctl = cd9660_ioctl,
841 .vop_lookup = vfs_cache_lookup,
842 .vop_pathconf = cd9660_pathconf,
843 .vop_read = cd9660_read,
844 .vop_readdir = cd9660_readdir,
845 .vop_readlink = cd9660_readlink,
846 .vop_reclaim = cd9660_reclaim,
847 .vop_setattr = cd9660_setattr,
848 .vop_strategy = cd9660_strategy,
849 .vop_vptofh = cd9660_vptofh,
850 .vop_getpages = cd9660_getpages,
851 };
852 VFS_VOP_VECTOR_REGISTER(cd9660_vnodeops);
853
854 /*
855 * Special device vnode ops
856 */
857
858 struct vop_vector cd9660_fifoops = {
859 .vop_default = &fifo_specops,
860 .vop_access = cd9660_access,
861 .vop_getattr = cd9660_getattr,
862 .vop_inactive = cd9660_inactive,
863 .vop_reclaim = cd9660_reclaim,
864 .vop_setattr = cd9660_setattr,
865 .vop_vptofh = cd9660_vptofh,
866 };
867 VFS_VOP_VECTOR_REGISTER(cd9660_fifoops);
868