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inet6: only mark autoconf addresses tentative if detached
[dragonfly.git] / sys / vfs / isofs / cd9660 / cd9660_vfsops.c
blob7e581bd690f29cb27736f77339ed27df86c05c19
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_vfsops.c 8.18 (Berkeley) 5/22/95
35 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/proc.h>
41 #include <sys/caps.h>
42 #include <sys/nlookup.h>
43 #include <sys/kernel.h>
44 #include <sys/vnode.h>
45 #include <sys/mount.h>
46 #include <sys/buf.h>
47 #include <sys/cdio.h>
48 #include <sys/conf.h>
49 #include <sys/fcntl.h>
50 #include <sys/malloc.h>
51 #include <sys/stat.h>
52 #include <sys/syslog.h>
53 #include <sys/iconv.h>
54
55 #include <vm/vm_zone.h>
56
57 #include <sys/buf2.h>
58
59 #include "iso.h"
60 #include "iso_rrip.h"
61 #include "cd9660_node.h"
62 #include "cd9660_mount.h"
63
64 extern struct vop_ops cd9660_vnode_vops;
65 extern struct vop_ops cd9660_spec_vops;
66 extern struct vop_ops cd9660_fifo_vops;
67
68 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
69 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
70
71 struct iconv_functions *cd9660_iconv = NULL;
72
73 static int cd9660_mount(struct mount *, char *, caddr_t, struct ucred *);
74 static int cd9660_unmount(struct mount *, int);
75 static int cd9660_root(struct mount *, struct vnode **);
76 static int cd9660_statfs(struct mount *, struct statfs *, struct ucred *);
77 static int cd9660_vget(struct mount *, struct vnode *, ino_t, struct vnode **);
78 static int cd9660_fhtovp(struct mount *, struct vnode *rootvp,
79 struct fid *, struct vnode **);
80 static int cd9660_checkexp(struct mount *, struct sockaddr *,
81 int *, struct ucred **);
82 static int cd9660_vptofh (struct vnode *, struct fid *);
83
84 static struct vfsops cd9660_vfsops = {
85 .vfs_flags = 0,
86 .vfs_mount = cd9660_mount,
87 .vfs_unmount = cd9660_unmount,
88 .vfs_root = cd9660_root,
89 .vfs_statfs = cd9660_statfs,
90 .vfs_vget = cd9660_vget,
91 .vfs_fhtovp = cd9660_fhtovp,
92 .vfs_checkexp = cd9660_checkexp,
93 .vfs_vptofh = cd9660_vptofh,
94 .vfs_init = cd9660_init,
95 .vfs_uninit = cd9660_uninit,
96 };
97 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
98 MODULE_VERSION(cd9660, 1);
99
100
101 /*
102 * Called by vfs_mountroot when iso is going to be mounted as root.
103 */
104
105 static int iso_get_ssector(cdev_t dev);
106 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
107 struct iso_args *argp);
108
109 /*
110 * Try to find the start of the last data track on this CD-ROM. This
111 * is used to mount the last session of a multi-session CD. Bail out
112 * and return 0 if we fail, this is always a safe bet.
113 */
114 static int
115 iso_get_ssector(cdev_t dev)
116 {
117 struct ioc_toc_header h;
118 struct ioc_read_toc_single_entry t;
119 int i;
120
121 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD,
122 proc0.p_ucred, NULL, NULL) != 0)
123 return 0;
124
125 for (i = h.ending_track; i >= 0; i--) {
126 t.address_format = CD_LBA_FORMAT;
127 t.track = i;
128 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD,
129 proc0.p_ucred, NULL, NULL) != 0) {
130 return 0;
131 }
132 if ((t.entry.control & 4) != 0)
133 /* found a data track */
134 break;
135 }
136
137 if (i < 0)
138 return 0;
139
140 return ntohl(t.entry.addr.lba);
141 }
142
143 static int
144 iso_mountroot(struct mount *mp)
145 {
146 struct iso_args args;
147 struct vnode *rootvp;
148 int error;
149
150 if ((error = bdevvp(rootdev, &rootvp))) {
151 kprintf("iso_mountroot: can't find rootvp\n");
152 return (error);
153 }
154 args.flags = ISOFSMNT_ROOT;
155
156 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
157 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL);
158 vn_unlock(rootvp);
159 if (error)
160 return (error);
161
162 args.ssector = iso_get_ssector(rootdev);
163
164 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
165 VOP_CLOSE(rootvp, FREAD, NULL);
166 vn_unlock(rootvp);
167
168 if (bootverbose)
169 kprintf("iso_mountroot(): using session at block %d\n",
170 args.ssector);
171 if ((error = iso_mountfs(rootvp, mp, &args)) != 0)
172 return (error);
173
174 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred);
175 return (0);
176 }
177
178 /*
179 * VFS Operations.
180 *
181 * mount system call
182 */
183 static int
184 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
185 {
186 struct vnode *devvp;
187 struct iso_args args;
188 size_t size;
189 int error;
190 mode_t accessmode;
191 struct iso_mnt *imp = NULL;
192 struct nlookupdata nd;
193
194 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) {
195 return (iso_mountroot(mp));
196 }
197 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
198 return (error);
199
200 if ((mp->mnt_flag & MNT_RDONLY) == 0)
201 return (EROFS);
202
203 /*
204 * If updating, check whether changing from read-only to
205 * read/write; if there is no device name, that's all we do.
206 */
207 if (mp->mnt_flag & MNT_UPDATE) {
208 imp = VFSTOISOFS(mp);
209 if (args.fspec == NULL)
210 return (vfs_export(mp, &imp->im_export, &args.export));
211 }
212 /*
213 * Not an update, or updating the name: look up the name
214 * and verify that it refers to a sensible block device.
215 */
216 devvp = NULL;
217 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
218 if (error == 0)
219 error = nlookup(&nd);
220 if (error == 0)
221 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
222 nlookup_done(&nd);
223 if (error)
224 return (error);
225
226 if (!vn_isdisk(devvp, &error)) {
227 vrele(devvp);
228 return (error);
229 }
230
231 /*
232 * Verify that user has necessary permissions on the device,
233 * or has superuser abilities
234 */
235 accessmode = VREAD;
236 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
237 error = VOP_EACCESS(devvp, accessmode, cred);
238 if (error)
239 error = caps_priv_check(cred, SYSCAP_RESTRICTEDROOT);
240 if (error) {
241 vput(devvp);
242 return (error);
243 }
244 vn_unlock(devvp);
245
246 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
247 error = iso_mountfs(devvp, mp, &args);
248 } else {
249 if (devvp != imp->im_devvp)
250 error = EINVAL; /* needs translation */
251 else
252 vrele(devvp);
253 }
254 if (error) {
255 vrele(devvp);
256 return error;
257 }
258 imp = VFSTOISOFS(mp);
259 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
260 &size);
261 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
262 cd9660_statfs(mp, &mp->mnt_stat, cred);
263 return 0;
264 }
265
266 /*
267 * Common code for mount and mountroot
268 */
269 static int
270 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp)
271 {
272 struct iso_mnt *isomp = NULL;
273 struct buf *bp = NULL;
274 struct buf *pribp = NULL, *supbp = NULL;
275 cdev_t dev;
276 int error = EINVAL;
277 int needclose = 0;
278 int high_sierra = 0;
279 int iso_bsize;
280 int iso_blknum;
281 int joliet_level;
282 struct iso_volume_descriptor *vdp = NULL;
283 struct iso_primary_descriptor *pri = NULL;
284 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
285 struct iso_supplementary_descriptor *sup = NULL;
286 struct iso_directory_record *rootp;
287 int logical_block_size;
288 char cs_local[ICONV_CSNMAXLEN];
289 char cs_disk[ICONV_CSNMAXLEN];
290
291 if (!(mp->mnt_flag & MNT_RDONLY))
292 return EROFS;
293
294 /*
295 * Disallow multiple mounts of the same device.
296 * Disallow mounting of a device that is currently in use
297 * Flush out any old buffers remaining from a previous use.
298 */
299 if ((error = vfs_mountedon(devvp)))
300 return error;
301 if (vcount(devvp) > 0)
302 return EBUSY;
303 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0)))
304 return (error);
305
306 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
307 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL);
308 vn_unlock(devvp);
309 if (error)
310 return error;
311 dev = devvp->v_rdev;
312 if (dev->si_iosize_max != 0)
313 mp->mnt_iosize_max = dev->si_iosize_max;
314 if (mp->mnt_iosize_max > MAXPHYS)
315 mp->mnt_iosize_max = MAXPHYS;
316
317 needclose = 1;
318
319 /* This is the "logical sector size". The standard says this
320 * should be 2048 or the physical sector size on the device,
321 * whichever is greater. For now, we'll just use a constant.
322 */
323 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
324
325 joliet_level = 0;
326 for (iso_blknum = 16 + argp->ssector;
327 iso_blknum < 100 + argp->ssector;
328 iso_blknum++) {
329 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize,
330 iso_bsize, &bp)) != 0)
331 goto out;
332
333 vdp = (struct iso_volume_descriptor *)bp->b_data;
334 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
335 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
336 sizeof vdp->id) != 0) {
337 error = EINVAL;
338 goto out;
339 } else
340 high_sierra = 1;
341 }
342 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
343 case ISO_VD_PRIMARY:
344 if (pribp == NULL) {
345 pribp = bp;
346 bp = NULL;
347 pri = (struct iso_primary_descriptor *)vdp;
348 pri_sierra =
349 (struct iso_sierra_primary_descriptor *)vdp;
350 }
351 break;
352
353 case ISO_VD_SUPPLEMENTARY:
354 if (supbp == NULL) {
355 supbp = bp;
356 bp = NULL;
357 sup = (struct iso_supplementary_descriptor *)vdp;
358
359 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
360 if (bcmp(sup->escape, "%/@", 3) == 0)
361 joliet_level = 1;
362 if (bcmp(sup->escape, "%/C", 3) == 0)
363 joliet_level = 2;
364 if (bcmp(sup->escape, "%/E", 3) == 0)
365 joliet_level = 3;
366
367 if ((isonum_711 (sup->flags) & 1) &&
368 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
369 joliet_level = 0;
370 }
371 }
372 break;
373
374 case ISO_VD_END:
375 goto vd_end;
376
377 default:
378 break;
379 }
380 if (bp) {
381 brelse(bp);
382 bp = NULL;
383 }
384 }
385 vd_end:
386 if (bp) {
387 brelse(bp);
388 bp = NULL;
389 }
390
391 if (pri == NULL) {
392 error = EINVAL;
393 goto out;
394 }
395
396 logical_block_size =
397 isonum_723 (high_sierra?
398 pri_sierra->logical_block_size:
399 pri->logical_block_size);
400
401 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
402 || (logical_block_size & (logical_block_size - 1)) != 0) {
403 error = EINVAL;
404 goto out;
405 }
406
407 rootp = (struct iso_directory_record *)
408 (high_sierra?
409 pri_sierra->root_directory_record:
410 pri->root_directory_record);
411
412 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
413 isomp->logical_block_size = logical_block_size;
414 isomp->volume_space_size =
415 isonum_733 (high_sierra?
416 pri_sierra->volume_space_size:
417 pri->volume_space_size);
418 isomp->joliet_level = 0;
419 /*
420 * Since an ISO9660 multi-session CD can also access previous
421 * sessions, we have to include them into the space consider-
422 * ations. This doesn't yield a very accurate number since
423 * parts of the old sessions might be inaccessible now, but we
424 * can't do much better. This is also important for the NFS
425 * filehandle validation.
426 */
427 isomp->volume_space_size += argp->ssector;
428 bcopy (rootp, isomp->root, sizeof isomp->root);
429 isomp->root_extent = isonum_733 (rootp->extent);
430 isomp->root_size = isonum_733 (rootp->size);
431
432 isomp->im_bmask = logical_block_size - 1;
433 isomp->im_bshift = ffs(logical_block_size) - 1;
434
435 pribp->b_flags |= B_AGE;
436 brelse(pribp);
437 pribp = NULL;
438
439 mp->mnt_data = (qaddr_t)isomp;
440 mp->mnt_stat.f_fsid.val[0] = devid_from_dev(dev);
441 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
442 mp->mnt_maxsymlinklen = 0;
443 mp->mnt_flag |= MNT_LOCAL;
444 isomp->im_mountp = mp;
445 isomp->im_dev = dev;
446 isomp->im_devvp = devvp;
447
448 dev->si_mountpoint = mp;
449
450 if (argp->flags & ISOFSMNT_UID)
451 isomp->im_uid = argp->uid;
452 if (argp->flags & ISOFSMNT_GID)
453 isomp->im_gid = argp->gid;
454 isomp->im_fmask = argp->fmask & ACCESSPERMS;
455 isomp->im_dmask = argp->dmask & ACCESSPERMS;
456
457 /* Check the Rock Ridge Extension support */
458 if (!(argp->flags & ISOFSMNT_NORRIP)) {
459 if ((error = bread(isomp->im_devvp,
460 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)),
461 isomp->logical_block_size, &bp)) != 0)
462 goto out;
463
464 rootp = (struct iso_directory_record *)bp->b_data;
465
466 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
467 argp->flags |= ISOFSMNT_NORRIP;
468 } else {
469 argp->flags &= ~ISOFSMNT_GENS;
470 }
471
472 /*
473 * The contents are valid,
474 * but they will get reread as part of another vnode, so...
475 */
476 bp->b_flags |= B_AGE;
477 brelse(bp);
478 bp = NULL;
479 }
480 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
481 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET |
482 ISOFSMNT_KICONV |
483 ISOFSMNT_UID | ISOFSMNT_GID);
484
485 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
486 bcopy(argp->cs_local, cs_local, sizeof(cs_local));
487 bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk));
488 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
489 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
490 } else {
491 isomp->im_d2l = NULL;
492 isomp->im_l2d = NULL;
493 }
494
495 if (high_sierra) {
496 /* this effectively ignores all the mount flags */
497 log(LOG_INFO, "cd9660: High Sierra Format\n");
498 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
499 } else {
500 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
501 default:
502 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
503 break;
504 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
505 isomp->iso_ftype = ISO_FTYPE_9660;
506 break;
507 case 0:
508 log(LOG_INFO, "cd9660: RockRidge Extension\n");
509 isomp->iso_ftype = ISO_FTYPE_RRIP;
510 break;
511 }
512 }
513
514 /* Decide whether to use the Joliet descriptor */
515
516 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
517 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
518 rootp = (struct iso_directory_record *)
519 sup->root_directory_record;
520 bcopy (rootp, isomp->root, sizeof isomp->root);
521 isomp->root_extent = isonum_733 (rootp->extent);
522 isomp->root_size = isonum_733 (rootp->size);
523 isomp->joliet_level = joliet_level;
524 supbp->b_flags |= B_AGE;
525 }
526
527 if (supbp) {
528 brelse(supbp);
529 supbp = NULL;
530 }
531
532 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops);
533 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops);
534 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops);
535
536 return 0;
537 out:
538 dev->si_mountpoint = NULL;
539 if (bp)
540 brelse(bp);
541 if (pribp)
542 brelse(pribp);
543 if (supbp)
544 brelse(supbp);
545 if (needclose) {
546 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
547 VOP_CLOSE(devvp, FREAD, NULL);
548 vn_unlock(devvp);
549 }
550 if (isomp) {
551 kfree((caddr_t)isomp, M_ISOFSMNT);
552 mp->mnt_data = (qaddr_t)0;
553 }
554 return error;
555 }
556
557 /*
558 * unmount system call
559 */
560 static int
561 cd9660_unmount(struct mount *mp, int mntflags)
562 {
563 struct iso_mnt *isomp;
564 int error, flags = 0;
565
566 if (mntflags & MNT_FORCE)
567 flags |= FORCECLOSE;
568 #if 0
569 mntflushbuf(mp, 0);
570 if (mntinvalbuf(mp))
571 return EBUSY;
572 #endif
573 if ((error = vflush(mp, 0, flags)))
574 return (error);
575
576 isomp = VFSTOISOFS(mp);
577
578 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
579 if (isomp->im_d2l)
580 cd9660_iconv->close(isomp->im_d2l);
581 if (isomp->im_l2d)
582 cd9660_iconv->close(isomp->im_l2d);
583 }
584
585 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
586 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
587 error = VOP_CLOSE(isomp->im_devvp, FREAD, NULL);
588 vn_unlock(isomp->im_devvp);
589 vrele(isomp->im_devvp);
590 kfree((caddr_t)isomp, M_ISOFSMNT);
591 mp->mnt_data = (qaddr_t)0;
592 mp->mnt_flag &= ~MNT_LOCAL;
593 return (error);
594 }
595
596 /*
597 * Return root of a filesystem
598 */
599 static int
600 cd9660_root(struct mount *mp, struct vnode **vpp)
601 {
602 struct iso_mnt *imp = VFSTOISOFS(mp);
603 struct iso_directory_record *dp =
604 (struct iso_directory_record *)imp->root;
605 ino_t ino = isodirino(dp, imp);
606
607 /*
608 * With RRIP we must use the `.' entry of the root directory.
609 * Simply tell vget, that it's a relocated directory.
610 */
611 return (cd9660_vget_internal(mp, ino, vpp,
612 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
613 }
614
615 /*
616 * Get filesystem statistics.
617 */
618 int
619 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
620 {
621 struct iso_mnt *isomp;
622
623 isomp = VFSTOISOFS(mp);
624
625 sbp->f_bsize = isomp->logical_block_size;
626 sbp->f_iosize = sbp->f_bsize; /* XXX */
627 sbp->f_blocks = isomp->volume_space_size;
628 sbp->f_bfree = 0; /* total free blocks */
629 sbp->f_bavail = 0; /* blocks free for non superuser */
630 sbp->f_files = 0; /* total files */
631 sbp->f_ffree = 0; /* free file nodes */
632 if (sbp != &mp->mnt_stat) {
633 sbp->f_type = mp->mnt_vfc->vfc_typenum;
634 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
635 }
636 return 0;
637 }
638
639 /*
640 * File handle to vnode
641 *
642 * Have to be really careful about stale file handles:
643 * - check that the inode number is in range
644 * - call iget() to get the locked inode
645 * - check for an unallocated inode (i_mode == 0)
646 * - check that the generation number matches
647 */
648
649 struct ifid {
650 ushort ifid_len;
651 ushort ifid_pad;
652 int ifid_ino;
653 long ifid_start;
654 };
655
656 /* ARGSUSED */
657 int
658 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp,
659 struct fid *fhp, struct vnode **vpp)
660 {
661 struct ifid *ifhp = (struct ifid *)fhp;
662 struct iso_node *ip;
663 struct vnode *nvp;
664 int error;
665
666 #ifdef ISOFS_DBG
667 kprintf("fhtovp: ino %d, start %ld\n",
668 ifhp->ifid_ino, ifhp->ifid_start);
669 #endif
670
671 if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) {
672 *vpp = NULLVP;
673 return (error);
674 }
675 ip = VTOI(nvp);
676 if (ip->inode.iso_mode == 0) {
677 vput(nvp);
678 *vpp = NULLVP;
679 return (ESTALE);
680 }
681 *vpp = nvp;
682 return (0);
683 }
684
685 int
686 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
687 struct ucred **credanonp)
688 {
689 struct netcred *np;
690 struct iso_mnt *imp;
691
692 imp = VFSTOISOFS(mp);
693
694 /*
695 * Get the export permission structure for this <mp, client> tuple.
696 */
697 np = vfs_export_lookup(mp, &imp->im_export, nam);
698 if (np == NULL)
699 return (EACCES);
700
701 *exflagsp = np->netc_exflags;
702 *credanonp = &np->netc_anon;
703 return (0);
704 }
705
706 int
707 cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp)
708 {
709
710 /*
711 * XXXX
712 * It would be nice if we didn't always set the `relocated' flag
713 * and force the extra read, but I don't want to think about fixing
714 * that right now.
715 */
716 return (cd9660_vget_internal(mp, ino, vpp,
717 #if 0
718 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
719 #else
720 0,
721 #endif
722 NULL));
723 }
724
725 int
726 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
727 int relocated, struct iso_directory_record *isodir)
728 {
729 struct iso_mnt *imp;
730 struct iso_node *ip;
731 struct buf *bp;
732 struct vnode *vp;
733 cdev_t dev;
734 int error;
735
736 imp = VFSTOISOFS(mp);
737 dev = imp->im_dev;
738 again:
739 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
740 return (0);
741
742 /* Allocate a new vnode/iso_node. */
743 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0);
744 if (error) {
745 *vpp = NULLVP;
746 return (error);
747 }
748 ip = kmalloc(sizeof(struct iso_node), M_ISOFSNODE, M_WAITOK | M_ZERO);
749 ip->i_vnode = vp;
750 ip->i_dev = dev;
751 ip->i_number = ino;
752
753 /*
754 * Insert it into the inode hash table and check for a collision.
755 * If a collision occurs, throw away the vnode and try again.
756 */
757 if (cd9660_ihashins(ip) != 0) {
758 kprintf("debug: cd9660 ihashins collision, retrying\n");
759 vx_put(vp);
760 kfree(ip, M_ISOFSNODE);
761 goto again;
762 }
763 vp->v_data = ip;
764
765 if (isodir == NULL) {
766 int lbn, off;
767
768 lbn = lblkno(imp, ino);
769 if (lbn >= imp->volume_space_size) {
770 vx_put(vp);
771 kprintf("fhtovp: lbn exceed volume space %d\n", lbn);
772 return (ESTALE);
773 }
774
775 off = blkoff(imp, ino);
776 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
777 vx_put(vp);
778 kprintf("fhtovp: crosses block boundary %d\n",
779 off + ISO_DIRECTORY_RECORD_SIZE);
780 return (ESTALE);
781 }
782
783 error = bread(imp->im_devvp,
784 lblktooff(imp, lbn),
785 imp->logical_block_size, &bp);
786 if (error) {
787 vx_put(vp);
788 brelse(bp);
789 kprintf("fhtovp: bread error %d\n",error);
790 return (error);
791 }
792 isodir = (struct iso_directory_record *)(bp->b_data + off);
793
794 if (off + isonum_711(isodir->length) >
795 imp->logical_block_size) {
796 vx_put(vp);
797 if (bp != NULL)
798 brelse(bp);
799 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
800 off +isonum_711(isodir->length), off,
801 isonum_711(isodir->length));
802 return (ESTALE);
803 }
804
805 #if 0
806 if (isonum_733(isodir->extent) +
807 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
808 if (bp != NULL)
809 brelse(bp);
810 kprintf("fhtovp: file start miss %d vs %d\n",
811 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
812 ifhp->ifid_start);
813 return (ESTALE);
814 }
815 #endif
816 } else
817 bp = NULL;
818
819 ip->i_mnt = imp;
820 ip->i_devvp = imp->im_devvp;
821 vref(ip->i_devvp);
822
823 if (relocated) {
824 /*
825 * On relocated directories we must
826 * read the `.' entry out of a dir.
827 */
828 ip->iso_start = ino >> imp->im_bshift;
829 if (bp != NULL)
830 brelse(bp);
831 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
832 vx_put(vp);
833 return (error);
834 }
835 isodir = (struct iso_directory_record *)bp->b_data;
836 }
837
838 ip->iso_extent = isonum_733(isodir->extent);
839 ip->i_size = isonum_733(isodir->size);
840 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
841
842 /*
843 * Setup time stamp, attribute
844 */
845 vp->v_type = VNON;
846 switch (imp->iso_ftype) {
847 default: /* ISO_FTYPE_9660 */
848 {
849 struct buf *bp2;
850 int off;
851 if ((imp->im_flags & ISOFSMNT_EXTATT)
852 && (off = isonum_711(isodir->ext_attr_length)))
853 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
854 &bp2);
855 else
856 bp2 = NULL;
857 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
858 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
859 if (bp2)
860 brelse(bp2);
861 break;
862 }
863 case ISO_FTYPE_RRIP:
864 cd9660_rrip_analyze(isodir, ip, imp);
865 break;
866 }
867
868 if (bp != NULL)
869 brelse(bp);
870
871 /*
872 * Initialize the associated vnode
873 */
874 vp->v_type = IFTOVT(ip->inode.iso_mode);
875
876 switch (vp->v_type) {
877 case VFIFO:
878 vp->v_ops = &mp->mnt_vn_fifo_ops;
879 break;
880 case VCHR:
881 case VBLK:
882 vp->v_ops = &mp->mnt_vn_spec_ops;
883 addaliasu(vp, umajor(ip->inode.iso_rdev),
884 uminor(ip->inode.iso_rdev));
885 break;
886 case VREG:
887 case VDIR:
888 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1);
889 break;
890 default:
891 break;
892 }
893
894 if (ip->iso_extent == imp->root_extent)
895 vsetflags(vp, VROOT);
896
897 /*
898 * Return the locked and refd vp
899 */
900 vx_downgrade(vp);
901 *vpp = vp;
902 return (0);
903 }
904
905 /*
906 * Vnode pointer to File handle
907 */
908 /* ARGSUSED */
909 int
910 cd9660_vptofh(struct vnode *vp, struct fid *fhp)
911 {
912 struct iso_node *ip = VTOI(vp);
913 struct ifid *ifhp;
914
915 ifhp = (struct ifid *)fhp;
916 ifhp->ifid_len = sizeof(struct ifid);
917
918 ifhp->ifid_ino = ip->i_number;
919 ifhp->ifid_start = ip->iso_start;
920
921 #ifdef ISOFS_DBG
922 kprintf("vptofh: ino %d, start %ld\n",
923 ifhp->ifid_ino,ifhp->ifid_start);
924 #endif
925 return 0;
926 }
DragonFly BSD