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 * 3. 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 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vnops.c,v 1.62 1999/12/15 23:01:51 eivind Exp $
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/uio.h>
41 #include <sys/proc.h>
42 #include <sys/kernel.h>
43 #include <sys/stat.h>
44 #include <sys/buf.h>
45 #include <sys/mount.h>
46 #include <sys/vnode.h>
47 #include <vfs/fifofs/fifo.h>
48 #include <sys/malloc.h>
49 #include <sys/dirent.h>
50 #include <sys/unistd.h>
51 #include <sys/filio.h>
52 #include <sys/lockf.h>
53 #include <sys/objcache.h>
54
55 #include <vm/vm.h>
56 #include <vm/vnode_pager.h>
57
58 #include <sys/buf2.h>
59
60 #include "iso.h"
61 #include "cd9660_mount.h"
62 #include "cd9660_node.h"
63 #include "iso_rrip.h"
64
65 static int cd9660_access(struct vop_access_args *);
66 static int cd9660_advlock(struct vop_advlock_args *);
67 static int cd9660_getattr(struct vop_getattr_args *);
68 static int cd9660_ioctl(struct vop_ioctl_args *);
69 static int cd9660_pathconf(struct vop_pathconf_args *);
70 static int cd9660_open(struct vop_open_args *);
71 static int cd9660_read(struct vop_read_args *);
72 static int cd9660_setattr(struct vop_setattr_args *);
73 struct isoreaddir;
74 static int iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off);
75 static int iso_shipdir(struct isoreaddir *idp);
76 static int cd9660_readdir(struct vop_readdir_args *);
77 static int cd9660_readlink(struct vop_readlink_args *ap);
78 static int cd9660_strategy(struct vop_strategy_args *);
79 static int cd9660_print(struct vop_print_args *);
80
81 /*
82 * Setattr call. Only allowed for block and character special devices.
83 *
84 * cd9660_setattr(struct vnode *a_vp, struct vattr *a_vap,
85 * struct ucred *a_cred, struct proc *a_p)
86 */
87 int
cd9660_setattr(struct vop_setattr_args * ap)88 cd9660_setattr(struct vop_setattr_args *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 case VDATABASE:
104 return (EROFS);
105 case VCHR:
106 case VBLK:
107 case VSOCK:
108 case VFIFO:
109 default:
110 return (0);
111 }
112 }
113 return (0);
114 }
115
116 /*
117 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
118 * The mode is shifted to select the owner/group/other fields. The
119 * super user is granted all permissions.
120 *
121 * cd9660_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
122 * struct proc *a_p)
123 */
124 /* ARGSUSED */
125 static int
cd9660_access(struct vop_access_args * ap)126 cd9660_access(struct vop_access_args *ap)
127 {
128 struct vnode *vp = ap->a_vp;
129 struct iso_node *ip = VTOI(vp);
130 mode_t file_mode;
131 uid_t uid;
132 gid_t gid;
133
134 KKASSERT(vp->v_mount->mnt_flag & MNT_RDONLY);
135
136 file_mode = ip->inode.iso_mode;
137 file_mode &= (vp->v_type == VDIR ?
138 ip->i_mnt->im_dmask : ip->i_mnt->im_fmask);
139 uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ?
140 ip->i_mnt->im_uid : ip->inode.iso_uid;
141 gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ?
142 ip->i_mnt->im_gid : ip->inode.iso_gid;
143
144 return (vop_helper_access(ap, uid, gid, file_mode, 0));
145 }
146
147 /*
148 * cd9660_getattr(struct vnode *a_vp, struct vattr *a_vap)
149 */
150 static int
cd9660_getattr(struct vop_getattr_args * ap)151 cd9660_getattr(struct vop_getattr_args *ap)
152 {
153 struct vnode *vp = ap->a_vp;
154 struct vattr *vap = ap->a_vap;
155 struct iso_node *ip = VTOI(vp);
156
157 vap->va_fsid = devid_from_dev(ip->i_dev);
158 vap->va_fileid = ip->i_number;
159
160 vap->va_mode = ip->inode.iso_mode;
161 vap->va_mode &= (vp->v_type == VDIR ?
162 ip->i_mnt->im_dmask : ip->i_mnt->im_fmask);
163
164 vap->va_nlink = ip->inode.iso_links;
165 vap->va_uid = (ip->i_mnt->im_flags & ISOFSMNT_UID) ?
166 ip->i_mnt->im_uid : ip->inode.iso_uid;
167 vap->va_gid = (ip->i_mnt->im_flags & ISOFSMNT_GID) ?
168 ip->i_mnt->im_gid : ip->inode.iso_gid;
169 vap->va_atime = ip->inode.iso_atime;
170 vap->va_mtime = ip->inode.iso_mtime;
171 vap->va_ctime = ip->inode.iso_ctime;
172 vap->va_rmajor = umajor(ip->inode.iso_rdev);
173 vap->va_rminor = uminor(ip->inode.iso_rdev);
174
175 vap->va_size = (u_quad_t)(unsigned long)ip->i_size;
176 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
177 struct vop_readlink_args rdlnk;
178 struct iovec aiov;
179 struct uio auio;
180 char *cp;
181
182 cp = kmalloc(MAXPATHLEN, M_TEMP, M_WAITOK);
183 aiov.iov_base = cp;
184 aiov.iov_len = MAXPATHLEN;
185 auio.uio_iov = &aiov;
186 auio.uio_iovcnt = 1;
187 auio.uio_offset = 0;
188 auio.uio_rw = UIO_READ;
189 auio.uio_segflg = UIO_SYSSPACE;
190 auio.uio_td = curthread;
191 auio.uio_resid = MAXPATHLEN;
192 rdlnk.a_uio = &auio;
193 rdlnk.a_vp = ap->a_vp;
194 rdlnk.a_cred = proc0.p_ucred; /* use root cred */
195 if (cd9660_readlink(&rdlnk) == 0)
196 vap->va_size = MAXPATHLEN - auio.uio_resid;
197 kfree(cp, M_TEMP);
198 }
199 vap->va_flags = 0;
200 vap->va_gen = 1;
201 vap->va_blocksize = ip->i_mnt->logical_block_size;
202 vap->va_bytes = (u_quad_t) ip->i_size;
203 vap->va_type = vp->v_type;
204 vap->va_filerev = 0;
205 return (0);
206 }
207
208 /*
209 * Vnode op for ioctl.
210 *
211 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data,
212 * int a_fflag, struct ucred *a_cred, struct proc *a_p)
213 */
214 static int
cd9660_ioctl(struct vop_ioctl_args * ap)215 cd9660_ioctl(struct vop_ioctl_args *ap)
216 {
217 struct vnode *vp = ap->a_vp;
218 struct iso_node *ip = VTOI(vp);
219
220 switch (ap->a_command) {
221
222 case FIOGETLBA:
223 *(int *)(ap->a_data) = ip->iso_start;
224 return 0;
225 default:
226 return (ENOTTY);
227 }
228 }
229
230 /*
231 * open is called when the kernel intends to read or memory map a vnode.
232 */
233 static int
cd9660_open(struct vop_open_args * ap)234 cd9660_open(struct vop_open_args *ap)
235 {
236 return(vop_stdopen(ap));
237 }
238
239 /*
240 * Vnode op for reading.
241 *
242 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
243 * struct ucred *a_cred)
244 */
245 static int
cd9660_read(struct vop_read_args * ap)246 cd9660_read(struct vop_read_args *ap)
247 {
248 struct vnode *vp = ap->a_vp;
249 struct uio *uio = ap->a_uio;
250 struct iso_node *ip = VTOI(vp);
251 struct iso_mnt *imp;
252 struct buf *bp;
253 daddr_t lbn, rablock;
254 off_t raoffset;
255 off_t loffset;
256 off_t diff;
257 int rasize, error = 0;
258 int seqcount;
259 long size, n, on;
260
261 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
262
263 if (uio->uio_resid == 0)
264 return (0);
265 if (uio->uio_offset < 0)
266 return (EINVAL);
267 ip->i_flag |= IN_ACCESS;
268 imp = ip->i_mnt;
269 do {
270 lbn = lblkno(imp, uio->uio_offset);
271 loffset = lblktooff(imp, lbn);
272 on = blkoff(imp, uio->uio_offset);
273 n = szmin((u_int)(imp->logical_block_size - on),
274 uio->uio_resid);
275 diff = (off_t)ip->i_size - uio->uio_offset;
276 if (diff <= 0)
277 return (0);
278 if (diff < n)
279 n = diff;
280 size = blksize(imp, ip, lbn);
281 rablock = lbn + 1;
282 raoffset = lblktooff(imp, rablock);
283 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
284 if (raoffset < ip->i_size) {
285 error = cluster_read(vp, (off_t)ip->i_size,
286 loffset, size,
287 uio->uio_resid,
288 (ap->a_ioflag >> IO_SEQSHIFT) *
289 MAXBSIZE,
290 &bp);
291 } else {
292 error = bread(vp, loffset, size, &bp);
293 }
294 } else {
295 if (seqcount > 1 &&
296 lblktosize(imp, rablock) < ip->i_size) {
297 rasize = blksize(imp, ip, rablock);
298 error = breadn(vp, loffset, size, &raoffset,
299 &rasize, 1, &bp);
300 } else
301 error = bread(vp, loffset, size, &bp);
302 }
303 n = imin(n, size - bp->b_resid);
304 if (error) {
305 brelse(bp);
306 return (error);
307 }
308
309 error = uiomove(bp->b_data + on, (int)n, uio);
310 brelse(bp);
311 } while (error == 0 && uio->uio_resid > 0 && n != 0);
312 return (error);
313 }
314
315 /* struct dirent + enough space for the maximum supported size */
316 struct iso_dirent {
317 struct dirent de;
318 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)];
319 };
320
321 /*
322 * Structure for reading directories
323 */
324 struct isoreaddir {
325 struct iso_dirent saveent;
326 struct iso_dirent assocent;
327 struct iso_dirent current;
328 off_t saveoff;
329 off_t assocoff;
330 off_t curroff;
331 struct uio *uio;
332 off_t uio_off;
333 int eofflag;
334 off_t *cookies;
335 int ncookies;
336 };
337
338 int
iso_uiodir(struct isoreaddir * idp,struct dirent * dp,off_t off)339 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
340 {
341 int error;
342
343 dp->d_name[dp->d_namlen] = 0;
344
345 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) {
346 idp->eofflag = 0;
347 return (-1);
348 }
349
350 if (idp->cookies) {
351 if (idp->ncookies <= 0) {
352 idp->eofflag = 0;
353 return (-1);
354 }
355
356 *idp->cookies++ = off;
357 --idp->ncookies;
358 }
359
360 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0)
361 return (error);
362 idp->uio_off = off;
363 return (0);
364 }
365
366 int
iso_shipdir(struct isoreaddir * idp)367 iso_shipdir(struct isoreaddir *idp)
368 {
369 struct dirent *dp;
370 int cl, sl, assoc;
371 int error;
372 char *cname, *sname;
373
374 cl = idp->current.de.d_namlen;
375 cname = idp->current.de.d_name;
376 assoc = (cl > 1) && (*cname == ASSOCCHAR);
377 if (assoc) {
378 cl--;
379 cname++;
380 }
381
382 dp = &idp->saveent.de;
383 sname = dp->d_name;
384 if (!(sl = dp->d_namlen)) {
385 dp = &idp->assocent.de;
386 sname = dp->d_name + 1;
387 sl = dp->d_namlen - 1;
388 }
389 if (sl > 0) {
390 if (sl != cl
391 || bcmp(sname,cname,sl)) {
392 if (idp->assocent.de.d_namlen) {
393 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0)
394 return (error);
395 idp->assocent.de.d_namlen = 0;
396 }
397 if (idp->saveent.de.d_namlen) {
398 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0)
399 return (error);
400 idp->saveent.de.d_namlen = 0;
401 }
402 }
403 }
404 if (assoc) {
405 idp->assocoff = idp->curroff;
406 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de));
407 } else {
408 idp->saveoff = idp->curroff;
409 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de));
410 }
411 return (0);
412 }
413
414 /*
415 * Vnode op for readdir
416 *
417 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
418 * int *a_eofflag, int *a_ncookies, off_t *a_cookies)
419 */
420 static int
cd9660_readdir(struct vop_readdir_args * ap)421 cd9660_readdir(struct vop_readdir_args *ap)
422 {
423 struct uio *uio = ap->a_uio;
424 struct isoreaddir *idp;
425 struct vnode *vdp = ap->a_vp;
426 struct iso_node *dp;
427 struct iso_mnt *imp;
428 struct buf *bp = NULL;
429 struct iso_directory_record *ep;
430 int entryoffsetinblock;
431 doff_t endsearch;
432 u_long bmask;
433 int error = 0;
434 int reclen;
435 u_short namelen;
436 int ncookies = 0;
437 off_t *cookies = NULL;
438
439 dp = VTOI(vdp);
440 imp = dp->i_mnt;
441 bmask = imp->im_bmask;
442
443 error = vn_lock(vdp, LK_EXCLUSIVE | LK_RETRY | LK_FAILRECLAIM);
444 if (error)
445 return (error);
446
447 idp = kmalloc(sizeof(*idp), M_TEMP, M_WAITOK);
448 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0;
449 /*
450 * XXX
451 * Is it worth trying to figure out the type?
452 */
453 idp->saveent.de.d_type = DT_UNKNOWN;
454 idp->assocent.de.d_type = DT_UNKNOWN;
455 idp->current.de.d_type = DT_UNKNOWN;
456 idp->uio = uio;
457 if (ap->a_ncookies == NULL) {
458 idp->cookies = NULL;
459 } else {
460 /*
461 * Guess the number of cookies needed. Guess at least
462 * 1 to avoid a degenerate case in malloc, and cap at
463 * a reasonable limit.
464 */
465 ncookies = uio->uio_resid / 16 + 1;
466 if (ncookies > 1024)
467 ncookies = 1024;
468 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
469 idp->cookies = cookies;
470 idp->ncookies = ncookies;
471 }
472 idp->eofflag = 1;
473 idp->curroff = uio->uio_offset;
474
475 if ((entryoffsetinblock = idp->curroff & bmask) &&
476 (error = cd9660_devblkatoff(vdp, idp->curroff, NULL, &bp))) {
477 kfree(idp, M_TEMP);
478 goto done;
479 }
480 endsearch = dp->i_size;
481
482 while (idp->curroff < endsearch) {
483 /*
484 * If offset is on a block boundary,
485 * read the next directory block.
486 * Release previous if it exists.
487 */
488 if ((idp->curroff & bmask) == 0) {
489 if (bp != NULL)
490 brelse(bp);
491 if ((error =
492 cd9660_devblkatoff(vdp, idp->curroff, NULL, &bp)) != 0)
493 break;
494 entryoffsetinblock = 0;
495 }
496 /*
497 * Get pointer to next entry.
498 */
499 ep = (struct iso_directory_record *)
500 ((char *)bp->b_data + entryoffsetinblock);
501
502 reclen = isonum_711(ep->length);
503 if (reclen == 0) {
504 /* skip to next block, if any */
505 idp->curroff =
506 (idp->curroff & ~bmask) + imp->logical_block_size;
507 continue;
508 }
509
510 if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
511 error = EINVAL;
512 /* illegal entry, stop */
513 break;
514 }
515
516 if (entryoffsetinblock + reclen > imp->logical_block_size) {
517 error = EINVAL;
518 /* illegal directory, so stop looking */
519 break;
520 }
521
522 idp->current.de.d_namlen = isonum_711(ep->name_len);
523
524 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) {
525 error = EINVAL;
526 /* illegal entry, stop */
527 break;
528 }
529
530 if (isonum_711(ep->flags)&2)
531 idp->current.de.d_ino = isodirino(ep, imp);
532 else
533 idp->current.de.d_ino = bp->b_bio1.bio_offset +
534 entryoffsetinblock;
535
536 idp->curroff += reclen;
537
538 switch (imp->iso_ftype) {
539 case ISO_FTYPE_RRIP:
540 {
541 ino_t cur_fileno = idp->current.de.d_ino;
542 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen,
543 &cur_fileno,imp);
544 idp->current.de.d_ino = cur_fileno;
545 idp->current.de.d_namlen = namelen;
546 if (idp->current.de.d_namlen)
547 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
548 break;
549 }
550 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/
551 strcpy(idp->current.de.d_name,"..");
552 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) {
553 idp->current.de.d_namlen = 1;
554 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
555 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) {
556 idp->current.de.d_namlen = 2;
557 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
558 } else {
559 isofntrans(ep->name,idp->current.de.d_namlen,
560 idp->current.de.d_name, &namelen,
561 imp->iso_ftype == ISO_FTYPE_9660,
562 isonum_711(ep->flags)&4,
563 imp->joliet_level,
564 imp->im_flags,
565 imp->im_d2l);
566 idp->current.de.d_namlen = namelen;
567 if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
568 error = iso_shipdir(idp);
569 else
570 error = iso_uiodir(idp,&idp->current.de,idp->curroff);
571 }
572 }
573 if (error)
574 break;
575
576 entryoffsetinblock += reclen;
577 }
578
579 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
580 idp->current.de.d_namlen = 0;
581 error = iso_shipdir(idp);
582 }
583 if (error < 0)
584 error = 0;
585
586 if (ap->a_ncookies != NULL) {
587 if (error)
588 kfree(cookies, M_TEMP);
589 else {
590 /*
591 * Work out the number of cookies actually used.
592 */
593 *ap->a_ncookies = ncookies - idp->ncookies;
594 *ap->a_cookies = cookies;
595 }
596 }
597
598 if (bp)
599 brelse (bp);
600
601 uio->uio_offset = idp->uio_off;
602 *ap->a_eofflag = idp->eofflag;
603
604 kfree(idp, M_TEMP);
605
606 done:
607 vn_unlock(vdp);
608 return (error);
609 }
610
611 /*
612 * Return target name of a symbolic link
613 * Shouldn't we get the parent vnode and read the data from there?
614 * This could eventually result in deadlocks in cd9660_lookup.
615 * But otherwise the block read here is in the block buffer two times.
616 */
617 typedef struct iso_directory_record ISODIR;
618 typedef struct iso_node ISONODE;
619 typedef struct iso_mnt ISOMNT;
620 /*
621 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
622 */
623 static int
cd9660_readlink(struct vop_readlink_args * ap)624 cd9660_readlink(struct vop_readlink_args *ap)
625 {
626 ISONODE *ip;
627 ISODIR *dirp;
628 ISOMNT *imp;
629 struct buf *bp;
630 struct uio *uio;
631 u_short symlen;
632 int error;
633 char *symname;
634
635 ip = VTOI(ap->a_vp);
636 imp = ip->i_mnt;
637 uio = ap->a_uio;
638
639 if (imp->iso_ftype != ISO_FTYPE_RRIP)
640 return (EINVAL);
641
642 /*
643 * Get parents directory record block that this inode included.
644 */
645 error = bread(imp->im_devvp,
646 rounddown2((off_t)ip->i_number, 1 << imp->im_bshift),
647 imp->logical_block_size, &bp);
648 if (error) {
649 brelse(bp);
650 return (EINVAL);
651 }
652
653 /*
654 * Setup the directory pointer for this inode
655 */
656 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
657
658 /*
659 * Just make sure, we have a right one....
660 * 1: Check not cross boundary on block
661 */
662 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
663 > (unsigned)imp->logical_block_size) {
664 brelse(bp);
665 return (EINVAL);
666 }
667
668 /*
669 * Now get a buffer
670 * Abuse a namei buffer for now.
671 */
672 if (uio->uio_segflg == UIO_SYSSPACE)
673 symname = uio->uio_iov->iov_base;
674 else
675 symname = objcache_get(namei_oc, M_WAITOK);
676
677 /*
678 * Ok, we just gathering a symbolic name in SL record.
679 */
680 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
681 if (uio->uio_segflg != UIO_SYSSPACE)
682 objcache_put(namei_oc, symname);
683 brelse(bp);
684 return (EINVAL);
685 }
686 /*
687 * Don't forget before you leave from home ;-)
688 */
689 brelse(bp);
690
691 /*
692 * return with the symbolic name to caller's.
693 */
694 if (uio->uio_segflg != UIO_SYSSPACE) {
695 error = uiomove(symname, symlen, uio);
696 objcache_put(namei_oc, symname);
697 return (error);
698 }
699 uio->uio_resid -= symlen;
700 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen;
701 uio->uio_iov->iov_len -= symlen;
702 return (0);
703 }
704
705 /*
706 * Calculate the logical to physical mapping if not done already,
707 * then call the device strategy routine.
708 *
709 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio)
710 */
711 static int
cd9660_strategy(struct vop_strategy_args * ap)712 cd9660_strategy(struct vop_strategy_args *ap)
713 {
714 struct bio *bio = ap->a_bio;
715 struct bio *nbio;
716 struct buf *bp = bio->bio_buf;
717 struct vnode *vp = ap->a_vp;
718 struct iso_node *ip;
719 int error;
720
721 ip = VTOI(vp);
722 if (vp->v_type == VBLK || vp->v_type == VCHR)
723 panic("cd9660_strategy: spec");
724 nbio = push_bio(bio);
725 if (nbio->bio_offset == NOOFFSET) {
726 error = VOP_BMAP(vp, bio->bio_offset,
727 &nbio->bio_offset, NULL, NULL, bp->b_cmd);
728 if (error) {
729 bp->b_error = error;
730 bp->b_flags |= B_ERROR;
731 /* I/O was never started on nbio, must biodone(bio) */
732 biodone(bio);
733 return (error);
734 }
735 if (nbio->bio_offset == NOOFFSET)
736 clrbuf(bp);
737 }
738 if (nbio->bio_offset == NOOFFSET) {
739 /* I/O was never started on nbio, must biodone(bio) */
740 biodone(bio);
741 return (0);
742 }
743 vp = ip->i_devvp;
744 vn_strategy(vp, nbio);
745 return (0);
746 }
747
748 /*
749 * Print out the contents of an inode.
750 *
751 * cd9660_print(struct vnode *a_vp)
752 */
753 static int
cd9660_print(struct vop_print_args * ap)754 cd9660_print(struct vop_print_args *ap)
755 {
756 kprintf("tag VT_ISOFS, isofs vnode\n");
757 return (0);
758 }
759
760 /*
761 * Return POSIX pathconf information applicable to cd9660 filesystems.
762 *
763 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval)
764 */
765 static int
cd9660_pathconf(struct vop_pathconf_args * ap)766 cd9660_pathconf(struct vop_pathconf_args *ap)
767 {
768 switch (ap->a_name) {
769 case _PC_LINK_MAX:
770 *ap->a_retval = 1;
771 return (0);
772 case _PC_NAME_MAX:
773 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
774 *ap->a_retval = NAME_MAX;
775 else
776 *ap->a_retval = 37;
777 return (0);
778 case _PC_PATH_MAX:
779 *ap->a_retval = PATH_MAX;
780 return (0);
781 case _PC_PIPE_BUF:
782 *ap->a_retval = PIPE_BUF;
783 return (0);
784 case _PC_CHOWN_RESTRICTED:
785 *ap->a_retval = 1;
786 return (0);
787 case _PC_NO_TRUNC:
788 *ap->a_retval = 1;
789 return (0);
790 default:
791 return (EINVAL);
792 }
793 /* NOTREACHED */
794 }
795
796 /*
797 * Advisory lock support
798 */
799 static int
cd9660_advlock(struct vop_advlock_args * ap)800 cd9660_advlock(struct vop_advlock_args *ap)
801 {
802 struct iso_node *ip = VTOI(ap->a_vp);
803 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
804 }
805
806 /*
807 * Global vfs data structures for cd9660
808 */
809 struct vop_ops cd9660_vnode_vops = {
810 .vop_default = vop_defaultop,
811 .vop_open = cd9660_open,
812 .vop_access = cd9660_access,
813 .vop_advlock = cd9660_advlock,
814 .vop_bmap = cd9660_bmap,
815 .vop_old_lookup = cd9660_lookup,
816 .vop_getattr = cd9660_getattr,
817 .vop_inactive = cd9660_inactive,
818 .vop_ioctl = cd9660_ioctl,
819 .vop_pathconf = cd9660_pathconf,
820 .vop_print = cd9660_print,
821 .vop_read = cd9660_read,
822 .vop_readdir = cd9660_readdir,
823 .vop_readlink = cd9660_readlink,
824 .vop_reclaim = cd9660_reclaim,
825 .vop_setattr = cd9660_setattr,
826 .vop_strategy = cd9660_strategy,
827 .vop_getpages = vop_stdgetpages,
828 .vop_putpages = vop_stdputpages
829 };
830
831 /*
832 * Special device vnode ops
833 */
834 struct vop_ops cd9660_spec_vops = {
835 .vop_default = vop_defaultop,
836 .vop_read = vop_stdnoread,
837 .vop_access = cd9660_access,
838 .vop_getattr = cd9660_getattr,
839 .vop_inactive = cd9660_inactive,
840 .vop_print = cd9660_print,
841 .vop_reclaim = cd9660_reclaim,
842 .vop_setattr = cd9660_setattr,
843 };
844
845 struct vop_ops cd9660_fifo_vops = {
846 .vop_default = fifo_vnoperate,
847 .vop_access = cd9660_access,
848 .vop_getattr = cd9660_getattr,
849 .vop_inactive = cd9660_inactive,
850 .vop_print = cd9660_print,
851 .vop_reclaim = cd9660_reclaim,
852 .vop_setattr = cd9660_setattr,
853 };
854