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[netbsd-mini2440.git] / sys / fs / cd9660 / cd9660_vfsops.c
blobd82668c7d4045e76af990e3de3be2d2f4a89a94a
1 /* $NetBSD: cd9660_vfsops.c,v 1.68 2009/10/19 17:53:36 tsutsui Exp $ */
2
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 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
37 */
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.68 2009/10/19 17:53:36 tsutsui Exp $");
41
42 #if defined(_KERNEL_OPT)
43 #include "opt_compat_netbsd.h"
44 #endif
45
46 #include <sys/param.h>
47 #include <sys/sysctl.h>
48 #include <sys/systm.h>
49 #include <sys/namei.h>
50 #include <sys/proc.h>
51 #include <sys/kernel.h>
52 #include <sys/vnode.h>
53 #include <miscfs/genfs/genfs.h>
54 #include <miscfs/specfs/specdev.h>
55 #include <sys/mount.h>
56 #include <sys/buf.h>
57 #include <sys/file.h>
58 #include <sys/disklabel.h>
59 #include <sys/device.h>
60 #include <sys/ioctl.h>
61 #include <sys/cdio.h>
62 #include <sys/errno.h>
63 #include <sys/malloc.h>
64 #include <sys/pool.h>
65 #include <sys/stat.h>
66 #include <sys/conf.h>
67 #include <sys/dirent.h>
68 #include <sys/kauth.h>
69 #include <sys/module.h>
70
71 #include <fs/cd9660/iso.h>
72 #include <fs/cd9660/cd9660_extern.h>
73 #include <fs/cd9660/iso_rrip.h>
74 #include <fs/cd9660/cd9660_node.h>
75 #include <fs/cd9660/cd9660_mount.h>
76
77 MODULE(MODULE_CLASS_VFS, cd9660, NULL);
78
79 MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
80
81 static struct sysctllog *cd9660_sysctl_log;
82
83 extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc;
84 extern const struct vnodeopv_desc cd9660_specop_opv_desc;
85 extern const struct vnodeopv_desc cd9660_fifoop_opv_desc;
86
87 const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = {
88 &cd9660_vnodeop_opv_desc,
89 &cd9660_specop_opv_desc,
90 &cd9660_fifoop_opv_desc,
91 NULL,
92 };
93
94 struct vfsops cd9660_vfsops = {
95 MOUNT_CD9660,
96 sizeof (struct iso_args),
97 cd9660_mount,
98 cd9660_start,
99 cd9660_unmount,
100 cd9660_root,
101 (void *)eopnotsupp,
102 cd9660_statvfs,
103 cd9660_sync,
104 cd9660_vget,
105 cd9660_fhtovp,
106 cd9660_vptofh,
107 cd9660_init,
108 cd9660_reinit,
109 cd9660_done,
110 cd9660_mountroot,
111 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
112 vfs_stdextattrctl,
113 (void *)eopnotsupp, /* vfs_suspendctl */
114 genfs_renamelock_enter,
115 genfs_renamelock_exit,
116 (void *)eopnotsupp,
117 cd9660_vnodeopv_descs,
118 0, /* refcount */
119 { NULL, NULL } /* list */
120 };
121
122 static const struct genfs_ops cd9660_genfsops = {
123 .gop_size = genfs_size,
124 };
125
126 /*
127 * Called by vfs_mountroot when iso is going to be mounted as root.
128 *
129 * Name is updated by mount(8) after booting.
130 */
131 #define ROOTNAME "root_device"
132
133 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len);
134 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
135 struct lwp *l, struct iso_args *argp);
136
137 static int
138 cd9660_modcmd(modcmd_t cmd, void *arg)
139 {
140 int error;
141
142 switch (cmd) {
143 case MODULE_CMD_INIT:
144 error = vfs_attach(&cd9660_vfsops);
145 if (error != 0)
146 break;
147 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
148 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL,
149 NULL, 0, NULL, 0,
150 CTL_VFS, CTL_EOL);
151 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
152 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660",
153 SYSCTL_DESCR("ISO-9660 file system"),
154 NULL, 0, NULL, 0,
155 CTL_VFS, 14, CTL_EOL);
156 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
157 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
158 CTLTYPE_INT, "utf8_joliet",
159 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"),
160 NULL, 0, &cd9660_utf8_joliet, 0,
161 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL);
162 /*
163 * XXX the "14" above could be dynamic, thereby eliminating
164 * one more instance of the "number to vfs" mapping problem,
165 * but "14" is the order as taken from sys/mount.h
166 */
167 break;
168 case MODULE_CMD_FINI:
169 error = vfs_detach(&cd9660_vfsops);
170 if (error != 0)
171 break;
172 sysctl_teardown(&cd9660_sysctl_log);
173 break;
174 default:
175 error = ENOTTY;
176 break;
177 }
178
179 return (error);
180 }
181
182 int
183 cd9660_mountroot(void)
184 {
185 struct mount *mp;
186 struct lwp *l = curlwp;
187 int error;
188 struct iso_args args;
189
190 if (device_class(root_device) != DV_DISK)
191 return (ENODEV);
192
193 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
194 != 0) {
195 vrele(rootvp);
196 return (error);
197 }
198
199 args.flags = ISOFSMNT_ROOT;
200 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
201 vfs_unbusy(mp, false, NULL);
202 vfs_destroy(mp);
203 return (error);
204 }
205 mutex_enter(&mountlist_lock);
206 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
207 mutex_exit(&mountlist_lock);
208 (void)cd9660_statvfs(mp, &mp->mnt_stat);
209 vfs_unbusy(mp, false, NULL);
210 return (0);
211 }
212
213 /*
214 * VFS Operations.
215 *
216 * mount system call
217 */
218 int
219 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
220 {
221 struct lwp *l = curlwp;
222 struct vnode *devvp;
223 struct iso_args *args = data;
224 int error;
225 struct iso_mnt *imp = VFSTOISOFS(mp);
226
227 if (*data_len < sizeof *args)
228 return EINVAL;
229
230 if (mp->mnt_flag & MNT_GETARGS) {
231 if (imp == NULL)
232 return EIO;
233 args->fspec = NULL;
234 args->flags = imp->im_flags;
235 *data_len = sizeof (*args);
236 return 0;
237 }
238
239 if ((mp->mnt_flag & MNT_RDONLY) == 0)
240 return (EROFS);
241
242 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
243 return EINVAL;
244
245 /*
246 * Not an update, or updating the name: look up the name
247 * and verify that it refers to a sensible block device.
248 */
249 error = namei_simple_user(args->fspec,
250 NSM_FOLLOW_NOEMULROOT, &devvp);
251 if (error != 0)
252 return (error);
253
254 if (devvp->v_type != VBLK) {
255 vrele(devvp);
256 return ENOTBLK;
257 }
258 if (bdevsw_lookup(devvp->v_rdev) == NULL) {
259 vrele(devvp);
260 return ENXIO;
261 }
262 /*
263 * If mount by non-root, then verify that user has necessary
264 * permissions on the device.
265 */
266 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
267 error = genfs_can_mount(devvp, VREAD, l->l_cred);
268 VOP_UNLOCK(devvp, 0);
269 if (error) {
270 vrele(devvp);
271 return (error);
272 }
273 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
274 error = VOP_OPEN(devvp, FREAD, FSCRED);
275 if (error)
276 goto fail;
277 error = iso_mountfs(devvp, mp, l, args);
278 if (error) {
279 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
280 (void)VOP_CLOSE(devvp, FREAD, NOCRED);
281 VOP_UNLOCK(devvp, 0);
282 goto fail;
283 }
284 } else {
285 vrele(devvp);
286 if (devvp != imp->im_devvp &&
287 devvp->v_rdev != imp->im_devvp->v_rdev)
288 return (EINVAL); /* needs translation */
289 }
290 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
291 mp->mnt_op->vfs_name, mp, l);
292
293 fail:
294 vrele(devvp);
295 return (error);
296 }
297
298 /*
299 * Make a mount point from a volume descriptor
300 */
301 static int
302 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len)
303 {
304 struct iso_primary_descriptor *pri;
305 int logical_block_size;
306 struct iso_directory_record *rootp;
307
308 pri = (struct iso_primary_descriptor *)bp->b_data;
309
310 logical_block_size = isonum_723 (pri->logical_block_size);
311
312 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
313 || (logical_block_size & (logical_block_size - 1)) != 0)
314 return -1;
315
316 rootp = (struct iso_directory_record *)pri->root_directory_record;
317
318 isomp->logical_block_size = logical_block_size;
319 isomp->volume_space_size = isonum_733 (pri->volume_space_size);
320 memcpy(isomp->root, rootp, sizeof(isomp->root));
321 isomp->root_extent = isonum_733 (rootp->extent);
322 isomp->root_size = isonum_733 (rootp->size);
323 isomp->im_joliet_level = 0;
324
325 isomp->im_bmask = logical_block_size - 1;
326 isomp->im_bshift = 0;
327 while ((1 << isomp->im_bshift) < isomp->logical_block_size)
328 isomp->im_bshift++;
329
330 if (ea_len != NULL)
331 *ea_len = isonum_711(rootp->ext_attr_length);
332
333 return 0;
334 }
335
336 /*
337 * Common code for mount and mountroot
338 */
339 static int
340 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l,
341 struct iso_args *argp)
342 {
343 struct iso_mnt *isomp = (struct iso_mnt *)0;
344 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL;
345 dev_t dev = devvp->v_rdev;
346 int error = EINVAL;
347 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
348 int iso_bsize;
349 int iso_blknum;
350 int joliet_level;
351 struct iso_volume_descriptor *vdp;
352 struct iso_supplementary_descriptor *sup;
353 int sess = 0;
354 int ext_attr_length;
355 struct disklabel label;
356
357 if (!ronly)
358 return EROFS;
359
360 /* Flush out any old buffers remaining from a previous use. */
361 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
362 return (error);
363
364 /* This is the "logical sector size". The standard says this
365 * should be 2048 or the physical sector size on the device,
366 * whichever is greater. For now, we'll just use a constant.
367 */
368 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
369
370 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED);
371 if (!error &&
372 label.d_partitions[DISKPART(dev)].p_fstype == FS_ISO9660) {
373 /* XXX more sanity checks? */
374 sess = label.d_partitions[DISKPART(dev)].p_cdsession;
375 } else {
376 /* fallback to old method */
377 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED);
378 if (error)
379 sess = 0; /* never mind */
380 }
381 #ifdef ISO_DEBUG
382 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess);
383 #endif
384
385 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
386 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize),
387 iso_bsize, NOCRED, 0, &bp)) != 0)
388 goto out;
389
390 vdp = (struct iso_volume_descriptor *)bp->b_data;
391 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) {
392 error = EINVAL;
393 goto out;
394 }
395
396 switch (isonum_711(vdp->type)) {
397 case ISO_VD_PRIMARY:
398 if (pribp == NULL) {
399 pribp = bp;
400 bp = NULL;
401 }
402 break;
403
404 case ISO_VD_SUPPLEMENTARY:
405 if (supbp == NULL) {
406 supbp = bp;
407 bp = NULL;
408 }
409 break;
410
411 default:
412 break;
413 }
414
415 if (isonum_711 (vdp->type) == ISO_VD_END) {
416 brelse(bp, 0);
417 bp = NULL;
418 break;
419 }
420
421 if (bp != NULL) {
422 brelse(bp, 0);
423 bp = NULL;
424 }
425 }
426
427 if (pribp == NULL) {
428 error = EINVAL;
429 goto out;
430 }
431
432 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
433 memset(isomp, 0, sizeof *isomp);
434 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) {
435 error = EINVAL;
436 goto out;
437 }
438
439 isomp->volume_space_size += sess;
440
441 brelse(pribp, BC_AGE);
442 pribp = NULL;
443
444 mp->mnt_data = isomp;
445 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
446 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660);
447 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
448 mp->mnt_stat.f_namemax = MAXNAMLEN;
449 mp->mnt_flag |= MNT_LOCAL;
450 mp->mnt_iflag |= IMNT_MPSAFE;
451 mp->mnt_dev_bshift = iso_bsize;
452 mp->mnt_fs_bshift = isomp->im_bshift;
453 isomp->im_mountp = mp;
454 isomp->im_dev = dev;
455 isomp->im_devvp = devvp;
456
457 /* Check the Rock Ridge Extension support */
458 if (!(argp->flags & ISOFSMNT_NORRIP)) {
459 struct iso_directory_record *rootp;
460
461 if ((error = bread(isomp->im_devvp,
462 (isomp->root_extent + ext_attr_length) <<
463 (isomp->im_bshift - DEV_BSHIFT),
464 isomp->logical_block_size, NOCRED,
465 0, &bp)) != 0)
466 goto out;
467
468 rootp = (struct iso_directory_record *)bp->b_data;
469
470 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
471 argp->flags |= ISOFSMNT_NORRIP;
472 } else {
473 argp->flags &= ~ISOFSMNT_GENS;
474 }
475
476 /*
477 * The contents are valid,
478 * but they will get reread as part of another vnode, so...
479 */
480 brelse(bp, BC_AGE);
481 bp = NULL;
482 }
483 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
484 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS);
485
486 if (isomp->im_flags & ISOFSMNT_GENS)
487 isomp->iso_ftype = ISO_FTYPE_9660;
488 else if (isomp->im_flags & ISOFSMNT_NORRIP) {
489 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
490 if (argp->flags & ISOFSMNT_NOCASETRANS)
491 isomp->im_flags |= ISOFSMNT_NOCASETRANS;
492 } else
493 isomp->iso_ftype = ISO_FTYPE_RRIP;
494
495 /* Check the Joliet Extension support */
496 if ((argp->flags & ISOFSMNT_NORRIP) != 0 &&
497 (argp->flags & ISOFSMNT_NOJOLIET) == 0 &&
498 supbp != NULL) {
499 joliet_level = 0;
500 sup = (struct iso_supplementary_descriptor *)supbp->b_data;
501
502 if ((isonum_711(sup->flags) & 1) == 0) {
503 if (memcmp(sup->escape, "%/@", 3) == 0)
504 joliet_level = 1;
505 if (memcmp(sup->escape, "%/C", 3) == 0)
506 joliet_level = 2;
507 if (memcmp(sup->escape, "%/E", 3) == 0)
508 joliet_level = 3;
509 }
510 if (joliet_level != 0) {
511 if (iso_makemp(isomp, supbp, NULL) == -1) {
512 error = EINVAL;
513 goto out;
514 }
515 isomp->im_joliet_level = joliet_level;
516 }
517 }
518
519 if (supbp != NULL) {
520 brelse(supbp, 0);
521 supbp = NULL;
522 }
523
524 devvp->v_specmountpoint = mp;
525
526 return 0;
527 out:
528 if (bp)
529 brelse(bp, 0);
530 if (pribp)
531 brelse(pribp, 0);
532 if (supbp)
533 brelse(supbp, 0);
534 if (isomp) {
535 free(isomp, M_ISOFSMNT);
536 mp->mnt_data = NULL;
537 }
538 return error;
539 }
540
541 /*
542 * Make a filesystem operational.
543 * Nothing to do at the moment.
544 */
545 /* ARGSUSED */
546 int
547 cd9660_start(struct mount *mp, int flags)
548 {
549 return 0;
550 }
551
552 /*
553 * unmount system call
554 */
555 int
556 cd9660_unmount(struct mount *mp, int mntflags)
557 {
558 struct iso_mnt *isomp;
559 int error, flags = 0;
560
561 if (mntflags & MNT_FORCE)
562 flags |= FORCECLOSE;
563 if ((error = vflush(mp, NULLVP, flags)) != 0)
564 return (error);
565
566 isomp = VFSTOISOFS(mp);
567
568 if (isomp->im_devvp->v_type != VBAD)
569 isomp->im_devvp->v_specmountpoint = NULL;
570
571 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
572 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED);
573 vput(isomp->im_devvp);
574 free(isomp, M_ISOFSMNT);
575 mp->mnt_data = NULL;
576 mp->mnt_flag &= ~MNT_LOCAL;
577 return (error);
578 }
579
580 /*
581 * Return root of a filesystem
582 */
583 int
584 cd9660_root(struct mount *mp, struct vnode **vpp)
585 {
586 struct iso_mnt *imp = VFSTOISOFS(mp);
587 struct iso_directory_record *dp =
588 (struct iso_directory_record *)imp->root;
589 ino_t ino = isodirino(dp, imp);
590
591 /*
592 * With RRIP we must use the `.' entry of the root directory.
593 * Simply tell vget, that it's a relocated directory.
594 */
595 return (cd9660_vget_internal(mp, ino, vpp,
596 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
597 }
598
599 /*
600 * Get file system statistics.
601 */
602 int
603 cd9660_statvfs(struct mount *mp, struct statvfs *sbp)
604 {
605 struct iso_mnt *isomp;
606
607 isomp = VFSTOISOFS(mp);
608
609 sbp->f_bsize = isomp->logical_block_size;
610 sbp->f_frsize = sbp->f_bsize;
611 sbp->f_iosize = sbp->f_bsize; /* XXX */
612 sbp->f_blocks = isomp->volume_space_size;
613 sbp->f_bfree = 0; /* total free blocks */
614 sbp->f_bavail = 0; /* blocks free for non superuser */
615 sbp->f_bresvd = 0; /* total reserved blocks */
616 sbp->f_files = 0; /* total files */
617 sbp->f_ffree = 0; /* free file nodes */
618 sbp->f_favail = 0; /* free file nodes for non superuser */
619 sbp->f_fresvd = 0; /* reserved file nodes */
620 copy_statvfs_info(sbp, mp);
621 /* Use the first spare for flags: */
622 sbp->f_spare[0] = isomp->im_flags;
623 return 0;
624 }
625
626 /* ARGSUSED */
627 int
628 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
629 {
630 return 0;
631 }
632
633 /*
634 * File handle to vnode
635 *
636 * Have to be really careful about stale file handles:
637 * - check that the inode number is in range
638 * - call iget() to get the locked inode
639 * - check for an unallocated inode (i_mode == 0)
640 * - check that the generation number matches
641 */
642
643 struct ifid {
644 ushort ifid_len;
645 ushort ifid_pad;
646 int ifid_ino;
647 long ifid_start;
648 };
649
650 /* ARGSUSED */
651 int
652 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
653 {
654 struct ifid ifh;
655 struct iso_node *ip;
656 struct vnode *nvp;
657 int error;
658
659 if (fhp->fid_len != sizeof(ifh))
660 return EINVAL;
661
662 memcpy(&ifh, fhp, sizeof(ifh));
663 #ifdef ISOFS_DBG
664 printf("fhtovp: ino %d, start %ld\n",
665 ifh.ifid_ino, ifh.ifid_start);
666 #endif
667
668 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) {
669 *vpp = NULLVP;
670 return (error);
671 }
672 ip = VTOI(nvp);
673 if (ip->inode.iso_mode == 0) {
674 vput(nvp);
675 *vpp = NULLVP;
676 return (ESTALE);
677 }
678 *vpp = nvp;
679 return (0);
680 }
681
682 int
683 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
684 {
685
686 /*
687 * XXXX
688 * It would be nice if we didn't always set the `relocated' flag
689 * and force the extra read, but I don't want to think about fixing
690 * that right now.
691 */
692 return (cd9660_vget_internal(mp, ino, vpp,
693 #if 0
694 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
695 #else
696 0,
697 #endif
698 NULL));
699 }
700
701 int
702 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
703 int relocated, struct iso_directory_record *isodir)
704 {
705 struct iso_mnt *imp;
706 struct iso_node *ip;
707 struct buf *bp;
708 struct vnode *vp;
709 dev_t dev;
710 int error;
711
712 imp = VFSTOISOFS(mp);
713 dev = imp->im_dev;
714
715 retry:
716 if ((*vpp = cd9660_ihashget(dev, ino, LK_EXCLUSIVE)) != NULLVP)
717 return (0);
718
719 /* Allocate a new vnode/iso_node. */
720 if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
721 *vpp = NULLVP;
722 return (error);
723 }
724 ip = pool_get(&cd9660_node_pool, PR_WAITOK);
725
726 /*
727 * If someone beat us to it, put back the freshly allocated
728 * vnode/inode pair and retry.
729 */
730 mutex_enter(&cd9660_hashlock);
731 if (cd9660_ihashget(dev, ino, 0) != NULL) {
732 mutex_exit(&cd9660_hashlock);
733 ungetnewvnode(vp);
734 pool_put(&cd9660_node_pool, ip);
735 goto retry;
736 }
737
738 memset(ip, 0, sizeof(struct iso_node));
739 vp->v_data = ip;
740 ip->i_vnode = vp;
741 ip->i_dev = dev;
742 ip->i_number = ino;
743 ip->i_mnt = imp;
744 ip->i_devvp = imp->im_devvp;
745 genfs_node_init(vp, &cd9660_genfsops);
746
747 /*
748 * Put it onto its hash chain and lock it so that other requests for
749 * this inode will block if they arrive while we are sleeping waiting
750 * for old data structures to be purged or for the contents of the
751 * disk portion of this inode to be read.
752 */
753 cd9660_ihashins(ip);
754 mutex_exit(&cd9660_hashlock);
755
756 if (isodir == 0) {
757 int lbn, off;
758
759 lbn = lblkno(imp, ino);
760 if (lbn >= imp->volume_space_size) {
761 vput(vp);
762 printf("fhtovp: lbn exceed volume space %d\n", lbn);
763 return (ESTALE);
764 }
765
766 off = blkoff(imp, ino);
767 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
768 vput(vp);
769 printf("fhtovp: crosses block boundary %d\n",
770 off + ISO_DIRECTORY_RECORD_SIZE);
771 return (ESTALE);
772 }
773
774 error = bread(imp->im_devvp,
775 lbn << (imp->im_bshift - DEV_BSHIFT),
776 imp->logical_block_size, NOCRED, 0, &bp);
777 if (error) {
778 vput(vp);
779 brelse(bp, 0);
780 printf("fhtovp: bread error %d\n",error);
781 return (error);
782 }
783 isodir = (struct iso_directory_record *)((char *)bp->b_data + off);
784
785 if (off + isonum_711(isodir->length) >
786 imp->logical_block_size) {
787 vput(vp);
788 if (bp != 0)
789 brelse(bp, 0);
790 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
791 off +isonum_711(isodir->length), off,
792 isonum_711(isodir->length));
793 return (ESTALE);
794 }
795
796 #if 0
797 if (isonum_733(isodir->extent) +
798 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
799 if (bp != 0)
800 brelse(bp, 0);
801 printf("fhtovp: file start miss %d vs %d\n",
802 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
803 ifhp->ifid_start);
804 return (ESTALE);
805 }
806 #endif
807 } else
808 bp = 0;
809
810 vref(ip->i_devvp);
811
812 if (relocated) {
813 /*
814 * On relocated directories we must
815 * read the `.' entry out of a dir.
816 */
817 ip->iso_start = ino >> imp->im_bshift;
818 if (bp != 0)
819 brelse(bp, 0);
820 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
821 vput(vp);
822 return (error);
823 }
824 isodir = (struct iso_directory_record *)bp->b_data;
825 }
826
827 ip->iso_extent = isonum_733(isodir->extent);
828 ip->i_size = isonum_733(isodir->size);
829 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
830
831 /*
832 * Setup time stamp, attribute
833 */
834 vp->v_type = VNON;
835 switch (imp->iso_ftype) {
836 default: /* ISO_FTYPE_9660 */
837 {
838 struct buf *bp2;
839 int off;
840 if ((imp->im_flags & ISOFSMNT_EXTATT)
841 && (off = isonum_711(isodir->ext_attr_length)))
842 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift),
843 NULL, &bp2);
844 else
845 bp2 = NULL;
846 cd9660_defattr(isodir, ip, bp2);
847 cd9660_deftstamp(isodir, ip, bp2);
848 if (bp2)
849 brelse(bp2, 0);
850 break;
851 }
852 case ISO_FTYPE_RRIP:
853 cd9660_rrip_analyze(isodir, ip, imp);
854 break;
855 }
856
857 if (bp != 0)
858 brelse(bp, 0);
859
860 /*
861 * Initialize the associated vnode
862 */
863 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
864 case VFIFO:
865 vp->v_op = cd9660_fifoop_p;
866 break;
867 case VCHR:
868 case VBLK:
869 /*
870 * if device, look at device number table for translation
871 */
872 vp->v_op = cd9660_specop_p;
873 spec_node_init(vp, ip->inode.iso_rdev);
874 break;
875 case VLNK:
876 case VNON:
877 case VSOCK:
878 case VDIR:
879 case VBAD:
880 break;
881 case VREG:
882 uvm_vnp_setsize(vp, ip->i_size);
883 break;
884 }
885
886 if (vp->v_type != VREG)
887 uvm_vnp_setsize(vp, 0);
888
889 if (ip->iso_extent == imp->root_extent)
890 vp->v_vflag |= VV_ROOT;
891
892 /*
893 * XXX need generation number?
894 */
895
896 *vpp = vp;
897 return (0);
898 }
899
900 /*
901 * Vnode pointer to File handle
902 */
903 /* ARGSUSED */
904 int
905 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
906 {
907 struct iso_node *ip = VTOI(vp);
908 struct ifid ifh;
909
910 if (*fh_size < sizeof(struct ifid)) {
911 *fh_size = sizeof(struct ifid);
912 return E2BIG;
913 }
914 *fh_size = sizeof(struct ifid);
915
916 memset(&ifh, 0, sizeof(ifh));
917 ifh.ifid_len = sizeof(struct ifid);
918 ifh.ifid_ino = ip->i_number;
919 ifh.ifid_start = ip->iso_start;
920 memcpy(fhp, &ifh, sizeof(ifh));
921
922 #ifdef ISOFS_DBG
923 printf("vptofh: ino %d, start %ld\n",
924 ifh.ifid_ino,ifh.ifid_start);
925 #endif
926 return 0;
927 }
NetBSD on the FriendlyARM MINI2440