Register keyword removal
[dragonfly.git] / sys / vfs / isofs / cd9660 / cd9660_vfsops.c
CommitLineData
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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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $
3a1b0fdc 40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.8 2003/07/26 19:27:41 rob Exp $
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41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
984263bc 45#include <sys/proc.h>
dadab5e9 46#include <sys/namei.h>
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47#include <sys/kernel.h>
48#include <sys/vnode.h>
49#include <sys/mount.h>
50#include <sys/buf.h>
51#include <sys/cdio.h>
52#include <sys/conf.h>
53#include <sys/fcntl.h>
54#include <sys/malloc.h>
55#include <sys/stat.h>
56#include <sys/syslog.h>
57
58#include <vm/vm_zone.h>
59
60#include <isofs/cd9660/iso.h>
61#include <isofs/cd9660/iso_rrip.h>
62#include <isofs/cd9660/cd9660_node.h>
63#include <isofs/cd9660/cd9660_mount.h>
64
65MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
66MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
67
68static int cd9660_mount __P((struct mount *,
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69 char *, caddr_t, struct nameidata *, struct thread *));
70static int cd9660_unmount __P((struct mount *, int, struct thread *));
984263bc 71static int cd9660_root __P((struct mount *, struct vnode **));
dadab5e9 72static int cd9660_statfs __P((struct mount *, struct statfs *, struct thread *));
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73static int cd9660_vget __P((struct mount *, ino_t, struct vnode **));
74static int cd9660_fhtovp __P((struct mount *, struct fid *, struct vnode **));
75static int cd9660_checkexp __P((struct mount *, struct sockaddr *,
76 int *, struct ucred **));
77static int cd9660_vptofh __P((struct vnode *, struct fid *));
78
79static struct vfsops cd9660_vfsops = {
80 cd9660_mount,
81 vfs_stdstart,
82 cd9660_unmount,
83 cd9660_root,
84 vfs_stdquotactl,
85 cd9660_statfs,
86 vfs_stdsync,
87 cd9660_vget,
88 cd9660_fhtovp,
89 cd9660_checkexp,
90 cd9660_vptofh,
91 cd9660_init,
92 cd9660_uninit,
93 vfs_stdextattrctl,
94};
95VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
96MODULE_VERSION(cd9660, 1);
97
98
99/*
100 * Called by vfs_mountroot when iso is going to be mounted as root.
101 */
102
dadab5e9 103static int iso_get_ssector __P((dev_t dev, struct thread *td));
984263bc 104static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
dadab5e9 105 struct thread *td, struct iso_args *argp));
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106
107/*
108 * Try to find the start of the last data track on this CD-ROM. This
109 * is used to mount the last session of a multi-session CD. Bail out
110 * and return 0 if we fail, this is always a safe bet.
111 */
112static int
dadab5e9 113iso_get_ssector(dev_t dev, struct thread *td)
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114{
115 struct ioc_toc_header h;
116 struct ioc_read_toc_single_entry t;
117 int i;
984263bc 118
335dda38 119 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
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120 return 0;
121
122 for (i = h.ending_track; i >= 0; i--) {
123 t.address_format = CD_LBA_FORMAT;
124 t.track = i;
335dda38 125 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) {
984263bc 126 return 0;
335dda38 127 }
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128 if ((t.entry.control & 4) != 0)
129 /* found a data track */
130 break;
131 }
132
133 if (i < 0)
134 return 0;
135
136 return ntohl(t.entry.addr.lba);
137}
138
dadab5e9 139static int iso_mountroot __P((struct mount *mp, struct thread *td));
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140
141static int
dadab5e9 142iso_mountroot(struct mount *mp, struct thread *td)
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143{
144 struct iso_args args;
145 int error;
146
147 if ((error = bdevvp(rootdev, &rootvp))) {
148 printf("iso_mountroot: can't find rootvp\n");
149 return (error);
150 }
151 args.flags = ISOFSMNT_ROOT;
152
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153 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
154 error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
155 VOP_UNLOCK(rootvp, 0, td);
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156 if (error)
157 return (error);
158
dadab5e9 159 args.ssector = iso_get_ssector(rootdev, td);
984263bc 160
3b568787 161 (void)VOP_CLOSE(rootvp, FREAD, td);
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162
163 if (bootverbose)
164 printf("iso_mountroot(): using session at block %d\n",
165 args.ssector);
dadab5e9 166 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
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167 return (error);
168
dadab5e9 169 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
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170 return (0);
171}
172
173/*
174 * VFS Operations.
175 *
176 * mount system call
177 */
178static int
dadab5e9 179cd9660_mount(mp, path, data, ndp, td)
3a1b0fdc 180 struct mount *mp;
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181 char *path;
182 caddr_t data;
183 struct nameidata *ndp;
dadab5e9 184 struct thread *td;
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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 = 0;
192
193 if ((mp->mnt_flag & MNT_ROOTFS) != 0) {
dadab5e9 194 return (iso_mountroot(mp, td));
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195 }
196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
197 return (error);
198
199 if ((mp->mnt_flag & MNT_RDONLY) == 0)
200 return (EROFS);
201
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202 KKASSERT(td->td_proc);
203
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204 /*
205 * If updating, check whether changing from read-only to
206 * read/write; if there is no device name, that's all we do.
207 */
208 if (mp->mnt_flag & MNT_UPDATE) {
209 imp = VFSTOISOFS(mp);
210 if (args.fspec == 0)
211 return (vfs_export(mp, &imp->im_export, &args.export));
212 }
213 /*
214 * Not an update, or updating the name: look up the name
215 * and verify that it refers to a sensible block device.
216 */
dadab5e9 217 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
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218 if ((error = namei(ndp)))
219 return (error);
220 NDFREE(ndp, NDF_ONLY_PNBUF);
221 devvp = ndp->ni_vp;
222
223 if (!vn_isdisk(devvp, &error)) {
224 vrele(devvp);
225 return (error);
226 }
227
228 /*
229 * Verify that user has necessary permissions on the device,
230 * or has superuser abilities
231 */
232 accessmode = VREAD;
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233 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
234 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td);
984263bc 235 if (error)
dadab5e9 236 error = suser(td);
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237 if (error) {
238 vput(devvp);
239 return (error);
240 }
dadab5e9 241 VOP_UNLOCK(devvp, 0, td);
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242
243 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
dadab5e9 244 error = iso_mountfs(devvp, mp, td, &args);
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245 } else {
246 if (devvp != imp->im_devvp)
247 error = EINVAL; /* needs translation */
248 else
249 vrele(devvp);
250 }
251 if (error) {
252 vrele(devvp);
253 return error;
254 }
255 imp = VFSTOISOFS(mp);
256 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
257 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
258 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
259 &size);
260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
dadab5e9 261 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
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262 return 0;
263}
264
265/*
266 * Common code for mount and mountroot
267 */
268static int
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269iso_mountfs(
270 struct vnode *devvp,
271 struct mount *mp,
272 struct thread *td,
273 struct iso_args *argp
274) {
3a1b0fdc 275 struct iso_mnt *isomp = (struct iso_mnt *)0;
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276 struct buf *bp = NULL;
277 struct buf *pribp = NULL, *supbp = NULL;
278 dev_t dev = devvp->v_rdev;
279 int error = EINVAL;
280 int needclose = 0;
281 int high_sierra = 0;
282 int iso_bsize;
283 int iso_blknum;
284 int joliet_level;
285 struct iso_volume_descriptor *vdp = 0;
286 struct iso_primary_descriptor *pri = NULL;
287 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
288 struct iso_supplementary_descriptor *sup = NULL;
289 struct iso_directory_record *rootp;
290 int logical_block_size;
291
292 if (!(mp->mnt_flag & MNT_RDONLY))
293 return EROFS;
294
295 /*
296 * Disallow multiple mounts of the same device.
297 * Disallow mounting of a device that is currently in use
298 * (except for root, which might share swap device for miniroot).
299 * Flush out any old buffers remaining from a previous use.
300 */
301 if ((error = vfs_mountedon(devvp)))
302 return error;
303 if (vcount(devvp) > 1 && devvp != rootvp)
304 return EBUSY;
3b568787 305 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
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306 return (error);
307
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308 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
309 error = VOP_OPEN(devvp, FREAD, FSCRED, td);
310 VOP_UNLOCK(devvp, 0, td);
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311 if (error)
312 return error;
313 if (devvp->v_rdev->si_iosize_max != 0)
314 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
315 if (mp->mnt_iosize_max > MAXPHYS)
316 mp->mnt_iosize_max = MAXPHYS;
317
318 needclose = 1;
319
320 /* This is the "logical sector size". The standard says this
321 * should be 2048 or the physical sector size on the device,
322 * whichever is greater. For now, we'll just use a constant.
323 */
324 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
325
326 joliet_level = 0;
327 for (iso_blknum = 16 + argp->ssector;
328 iso_blknum < 100 + argp->ssector;
329 iso_blknum++) {
330 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
3b568787 331 iso_bsize, &bp)) != 0)
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332 goto out;
333
334 vdp = (struct iso_volume_descriptor *)bp->b_data;
335 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
336 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
337 sizeof vdp->id) != 0) {
338 error = EINVAL;
339 goto out;
340 } else
341 high_sierra = 1;
342 }
343 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
344 case ISO_VD_PRIMARY:
345 if (pribp == NULL) {
346 pribp = bp;
347 bp = NULL;
348 pri = (struct iso_primary_descriptor *)vdp;
349 pri_sierra =
350 (struct iso_sierra_primary_descriptor *)vdp;
351 }
352 break;
353
354 case ISO_VD_SUPPLEMENTARY:
355 if (supbp == NULL) {
356 supbp = bp;
357 bp = NULL;
358 sup = (struct iso_supplementary_descriptor *)vdp;
359
360 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
361 if (bcmp(sup->escape, "%/@", 3) == 0)
362 joliet_level = 1;
363 if (bcmp(sup->escape, "%/C", 3) == 0)
364 joliet_level = 2;
365 if (bcmp(sup->escape, "%/E", 3) == 0)
366 joliet_level = 3;
367
368 if ((isonum_711 (sup->flags) & 1) &&
369 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
370 joliet_level = 0;
371 }
372 }
373 break;
374
375 case ISO_VD_END:
376 goto vd_end;
377
378 default:
379 break;
380 }
381 if (bp) {
382 brelse(bp);
383 bp = NULL;
384 }
385 }
386 vd_end:
387 if (bp) {
388 brelse(bp);
389 bp = NULL;
390 }
391
392 if (pri == NULL) {
393 error = EINVAL;
394 goto out;
395 }
396
397 logical_block_size =
398 isonum_723 (high_sierra?
399 pri_sierra->logical_block_size:
400 pri->logical_block_size);
401
402 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
403 || (logical_block_size & (logical_block_size - 1)) != 0) {
404 error = EINVAL;
405 goto out;
406 }
407
408 rootp = (struct iso_directory_record *)
409 (high_sierra?
410 pri_sierra->root_directory_record:
411 pri->root_directory_record);
412
413 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
414 bzero((caddr_t)isomp, sizeof *isomp);
415 isomp->logical_block_size = logical_block_size;
416 isomp->volume_space_size =
417 isonum_733 (high_sierra?
418 pri_sierra->volume_space_size:
419 pri->volume_space_size);
420 isomp->joliet_level = 0;
421 /*
422 * Since an ISO9660 multi-session CD can also access previous
423 * sessions, we have to include them into the space consider-
424 * ations. This doesn't yield a very accurate number since
425 * parts of the old sessions might be inaccessible now, but we
426 * can't do much better. This is also important for the NFS
427 * filehandle validation.
428 */
429 isomp->volume_space_size += argp->ssector;
430 bcopy (rootp, isomp->root, sizeof isomp->root);
431 isomp->root_extent = isonum_733 (rootp->extent);
432 isomp->root_size = isonum_733 (rootp->size);
433
434 isomp->im_bmask = logical_block_size - 1;
435 isomp->im_bshift = ffs(logical_block_size) - 1;
436
437 pribp->b_flags |= B_AGE;
438 brelse(pribp);
439 pribp = NULL;
440
441 mp->mnt_data = (qaddr_t)isomp;
442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
444 mp->mnt_maxsymlinklen = 0;
445 mp->mnt_flag |= MNT_LOCAL;
446 isomp->im_mountp = mp;
447 isomp->im_dev = dev;
448 isomp->im_devvp = devvp;
449
450 devvp->v_specmountpoint = mp;
451
452 /* Check the Rock Ridge Extention support */
453 if (!(argp->flags & ISOFSMNT_NORRIP)) {
454 if ((error = bread(isomp->im_devvp,
455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
456 (isomp->im_bshift - DEV_BSHIFT),
3b568787 457 isomp->logical_block_size, &bp)) != 0)
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458 goto out;
459
460 rootp = (struct iso_directory_record *)bp->b_data;
461
462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
463 argp->flags |= ISOFSMNT_NORRIP;
464 } else {
465 argp->flags &= ~ISOFSMNT_GENS;
466 }
467
468 /*
469 * The contents are valid,
470 * but they will get reread as part of another vnode, so...
471 */
472 bp->b_flags |= B_AGE;
473 brelse(bp);
474 bp = NULL;
475 }
476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
478
479 if (high_sierra) {
480 /* this effectively ignores all the mount flags */
481 log(LOG_INFO, "cd9660: High Sierra Format\n");
482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
483 } else
484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
485 default:
486 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
487 break;
488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
489 isomp->iso_ftype = ISO_FTYPE_9660;
490 break;
491 case 0:
492 log(LOG_INFO, "cd9660: RockRidge Extension\n");
493 isomp->iso_ftype = ISO_FTYPE_RRIP;
494 break;
495 }
496
497 /* Decide whether to use the Joliet descriptor */
498
499 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
500 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
501 rootp = (struct iso_directory_record *)
502 sup->root_directory_record;
503 bcopy (rootp, isomp->root, sizeof isomp->root);
504 isomp->root_extent = isonum_733 (rootp->extent);
505 isomp->root_size = isonum_733 (rootp->size);
506 isomp->joliet_level = joliet_level;
507 supbp->b_flags |= B_AGE;
508 }
509
510 if (supbp) {
511 brelse(supbp);
512 supbp = NULL;
513 }
514
515 return 0;
516out:
517 devvp->v_specmountpoint = NULL;
518 if (bp)
519 brelse(bp);
520 if (pribp)
521 brelse(pribp);
522 if (supbp)
523 brelse(supbp);
524 if (needclose)
3b568787 525 (void)VOP_CLOSE(devvp, FREAD, td);
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526 if (isomp) {
527 free((caddr_t)isomp, M_ISOFSMNT);
528 mp->mnt_data = (qaddr_t)0;
529 }
530 return error;
531}
532
533/*
534 * unmount system call
535 */
536static int
dadab5e9 537cd9660_unmount(struct mount *mp, int mntflags, struct thread *td)
984263bc 538{
3a1b0fdc 539 struct iso_mnt *isomp;
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540 int error, flags = 0;
541
542 if (mntflags & MNT_FORCE)
543 flags |= FORCECLOSE;
544#if 0
545 mntflushbuf(mp, 0);
546 if (mntinvalbuf(mp))
547 return EBUSY;
548#endif
549 if ((error = vflush(mp, 0, flags)))
550 return (error);
551
552 isomp = VFSTOISOFS(mp);
553
554 isomp->im_devvp->v_specmountpoint = NULL;
3b568787 555 error = VOP_CLOSE(isomp->im_devvp, FREAD, td);
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556 vrele(isomp->im_devvp);
557 free((caddr_t)isomp, M_ISOFSMNT);
558 mp->mnt_data = (qaddr_t)0;
559 mp->mnt_flag &= ~MNT_LOCAL;
560 return (error);
561}
562
563/*
564 * Return root of a filesystem
565 */
566static int
567cd9660_root(mp, vpp)
568 struct mount *mp;
569 struct vnode **vpp;
570{
571 struct iso_mnt *imp = VFSTOISOFS(mp);
572 struct iso_directory_record *dp =
573 (struct iso_directory_record *)imp->root;
574 ino_t ino = isodirino(dp, imp);
575
576 /*
577 * With RRIP we must use the `.' entry of the root directory.
578 * Simply tell vget, that it's a relocated directory.
579 */
580 return (cd9660_vget_internal(mp, ino, vpp,
581 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
582}
583
584/*
585 * Get file system statistics.
586 */
587int
3a1b0fdc 588cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
984263bc 589{
dadab5e9 590 struct iso_mnt *isomp;
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591
592 isomp = VFSTOISOFS(mp);
593
594 sbp->f_bsize = isomp->logical_block_size;
595 sbp->f_iosize = sbp->f_bsize; /* XXX */
596 sbp->f_blocks = isomp->volume_space_size;
597 sbp->f_bfree = 0; /* total free blocks */
598 sbp->f_bavail = 0; /* blocks free for non superuser */
599 sbp->f_files = 0; /* total files */
600 sbp->f_ffree = 0; /* free file nodes */
601 if (sbp != &mp->mnt_stat) {
602 sbp->f_type = mp->mnt_vfc->vfc_typenum;
603 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
604 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
605 }
606 return 0;
607}
608
609/*
610 * File handle to vnode
611 *
612 * Have to be really careful about stale file handles:
613 * - check that the inode number is in range
614 * - call iget() to get the locked inode
615 * - check for an unallocated inode (i_mode == 0)
616 * - check that the generation number matches
617 */
618
619struct ifid {
620 ushort ifid_len;
621 ushort ifid_pad;
622 int ifid_ino;
623 long ifid_start;
624};
625
626/* ARGSUSED */
627int
628cd9660_fhtovp(mp, fhp, vpp)
3a1b0fdc 629 struct mount *mp;
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630 struct fid *fhp;
631 struct vnode **vpp;
632{
633 struct ifid *ifhp = (struct ifid *)fhp;
3a1b0fdc 634 struct iso_node *ip;
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635 struct vnode *nvp;
636 int error;
637
638#ifdef ISOFS_DBG
639 printf("fhtovp: ino %d, start %ld\n",
640 ifhp->ifid_ino, ifhp->ifid_start);
641#endif
642
643 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
644 *vpp = NULLVP;
645 return (error);
646 }
647 ip = VTOI(nvp);
648 if (ip->inode.iso_mode == 0) {
649 vput(nvp);
650 *vpp = NULLVP;
651 return (ESTALE);
652 }
653 *vpp = nvp;
654 return (0);
655}
656
657int
658cd9660_checkexp(mp, nam, exflagsp, credanonp)
659 struct mount *mp;
660 struct sockaddr *nam;
661 int *exflagsp;
662 struct ucred **credanonp;
663{
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664 struct netcred *np;
665 struct iso_mnt *imp;
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666
667 imp = VFSTOISOFS(mp);
668
669 /*
670 * Get the export permission structure for this <mp, client> tuple.
671 */
672 np = vfs_export_lookup(mp, &imp->im_export, nam);
673 if (np == NULL)
674 return (EACCES);
675
676 *exflagsp = np->netc_exflags;
677 *credanonp = &np->netc_anon;
678 return (0);
679}
680
681int
682cd9660_vget(mp, ino, vpp)
683 struct mount *mp;
684 ino_t ino;
685 struct vnode **vpp;
686{
687
688 /*
689 * XXXX
690 * It would be nice if we didn't always set the `relocated' flag
691 * and force the extra read, but I don't want to think about fixing
692 * that right now.
693 */
694 return (cd9660_vget_internal(mp, ino, vpp,
695#if 0
696 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
697#else
698 0,
699#endif
700 (struct iso_directory_record *)0));
701}
702
703int
704cd9660_vget_internal(mp, ino, vpp, relocated, isodir)
705 struct mount *mp;
706 ino_t ino;
707 struct vnode **vpp;
708 int relocated;
709 struct iso_directory_record *isodir;
710{
711 struct iso_mnt *imp;
712 struct iso_node *ip;
713 struct buf *bp;
714 struct vnode *vp;
715 dev_t dev;
716 int error;
717
718 imp = VFSTOISOFS(mp);
719 dev = imp->im_dev;
720 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
721 return (0);
722
723 /* Allocate a new vnode/iso_node. */
724 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
725 *vpp = NULLVP;
726 return (error);
727 }
728 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
729 M_WAITOK);
730 bzero((caddr_t)ip, sizeof(struct iso_node));
377d4740 731 lockinit(&ip->i_lock, 0, "isonode", 0, 0);
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732 vp->v_data = ip;
733 ip->i_vnode = vp;
734 ip->i_dev = dev;
735 ip->i_number = ino;
736
737 /*
738 * Put it onto its hash chain and lock it so that other requests for
739 * this inode will block if they arrive while we are sleeping waiting
740 * for old data structures to be purged or for the contents of the
741 * disk portion of this inode to be read.
742 */
743 cd9660_ihashins(ip);
744
745 if (isodir == 0) {
746 int lbn, off;
747
748 lbn = lblkno(imp, ino);
749 if (lbn >= imp->volume_space_size) {
750 vput(vp);
751 printf("fhtovp: lbn exceed volume space %d\n", lbn);
752 return (ESTALE);
753 }
754
755 off = blkoff(imp, ino);
756 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
757 vput(vp);
758 printf("fhtovp: crosses block boundary %d\n",
759 off + ISO_DIRECTORY_RECORD_SIZE);
760 return (ESTALE);
761 }
762
763 error = bread(imp->im_devvp,
764 lbn << (imp->im_bshift - DEV_BSHIFT),
3b568787 765 imp->logical_block_size, &bp);
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766 if (error) {
767 vput(vp);
768 brelse(bp);
769 printf("fhtovp: bread error %d\n",error);
770 return (error);
771 }
772 isodir = (struct iso_directory_record *)(bp->b_data + off);
773
774 if (off + isonum_711(isodir->length) >
775 imp->logical_block_size) {
776 vput(vp);
777 if (bp != 0)
778 brelse(bp);
779 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
780 off +isonum_711(isodir->length), off,
781 isonum_711(isodir->length));
782 return (ESTALE);
783 }
784
785#if 0
786 if (isonum_733(isodir->extent) +
787 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
788 if (bp != 0)
789 brelse(bp);
790 printf("fhtovp: file start miss %d vs %d\n",
791 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
792 ifhp->ifid_start);
793 return (ESTALE);
794 }
795#endif
796 } else
797 bp = 0;
798
799 ip->i_mnt = imp;
800 ip->i_devvp = imp->im_devvp;
801 VREF(ip->i_devvp);
802
803 if (relocated) {
804 /*
805 * On relocated directories we must
806 * read the `.' entry out of a dir.
807 */
808 ip->iso_start = ino >> imp->im_bshift;
809 if (bp != 0)
810 brelse(bp);
811 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
812 vput(vp);
813 return (error);
814 }
815 isodir = (struct iso_directory_record *)bp->b_data;
816 }
817
818 ip->iso_extent = isonum_733(isodir->extent);
819 ip->i_size = isonum_733(isodir->size);
820 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
821
822 /*
823 * Setup time stamp, attribute
824 */
825 vp->v_type = VNON;
826 switch (imp->iso_ftype) {
827 default: /* ISO_FTYPE_9660 */
828 {
829 struct buf *bp2;
830 int off;
831 if ((imp->im_flags & ISOFSMNT_EXTATT)
832 && (off = isonum_711(isodir->ext_attr_length)))
833 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
834 &bp2);
835 else
836 bp2 = NULL;
837 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
838 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
839 if (bp2)
840 brelse(bp2);
841 break;
842 }
843 case ISO_FTYPE_RRIP:
844 cd9660_rrip_analyze(isodir, ip, imp);
845 break;
846 }
847
848 if (bp != 0)
849 brelse(bp);
850
851 /*
852 * Initialize the associated vnode
853 */
854 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
855 case VFIFO:
856 vp->v_op = cd9660_fifoop_p;
857 break;
858 case VCHR:
859 case VBLK:
860 vp->v_op = cd9660_specop_p;
861 addaliasu(vp, ip->inode.iso_rdev);
862 break;
863 default:
864 break;
865 }
866
867 if (ip->iso_extent == imp->root_extent)
868 vp->v_flag |= VROOT;
869
870 /*
871 * XXX need generation number?
872 */
873
874 *vpp = vp;
875 return (0);
876}
877
878/*
879 * Vnode pointer to File handle
880 */
881/* ARGSUSED */
882int
883cd9660_vptofh(vp, fhp)
884 struct vnode *vp;
885 struct fid *fhp;
886{
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887 struct iso_node *ip = VTOI(vp);
888 struct ifid *ifhp;
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889
890 ifhp = (struct ifid *)fhp;
891 ifhp->ifid_len = sizeof(struct ifid);
892
893 ifhp->ifid_ino = ip->i_number;
894 ifhp->ifid_start = ip->iso_start;
895
896#ifdef ISOFS_DBG
897 printf("vptofh: ino %d, start %ld\n",
898 ifhp->ifid_ino,ifhp->ifid_start);
899#endif
900 return 0;
901}