1 /* $NetBSD: cd9660_vfsops.c,v 1.90 2015/03/28 19:24:05 maxv 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 1.90 2015/03/28 19:24:05 maxv 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 .vfs_name = MOUNT_CD9660,
96 .vfs_min_mount_data = sizeof (struct iso_args),
97 .vfs_mount = cd9660_mount,
98 .vfs_start = cd9660_start,
99 .vfs_unmount = cd9660_unmount,
100 .vfs_root = cd9660_root,
101 .vfs_quotactl = (void *)eopnotsupp,
102 .vfs_statvfs = cd9660_statvfs,
103 .vfs_sync = cd9660_sync,
104 .vfs_vget = cd9660_vget,
105 .vfs_loadvnode = cd9660_loadvnode,
106 .vfs_fhtovp = cd9660_fhtovp,
107 .vfs_vptofh = cd9660_vptofh,
108 .vfs_init = cd9660_init,
109 .vfs_reinit = cd9660_reinit,
110 .vfs_done = cd9660_done,
111 .vfs_mountroot = cd9660_mountroot,
112 .vfs_snapshot = (void *)eopnotsupp,
113 .vfs_extattrctl = vfs_stdextattrctl,
114 .vfs_suspendctl = (void *)eopnotsupp,
115 .vfs_renamelock_enter = genfs_renamelock_enter,
116 .vfs_renamelock_exit = genfs_renamelock_exit,
117 .vfs_fsync = (void *)eopnotsupp,
118 .vfs_opv_descs = cd9660_vnodeopv_descs
119 };
120
121 static const struct genfs_ops cd9660_genfsops = {
122 .gop_size = genfs_size,
123 };
124
125 /*
126 * Called by vfs_mountroot when iso is going to be mounted as root.
127 *
128 * Name is updated by mount(8) after booting.
129 */
130 static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len);
131 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
132 struct lwp *l, struct iso_args *argp);
133
134 static int
cd9660_modcmd(modcmd_t cmd,void * arg)135 cd9660_modcmd(modcmd_t cmd, void *arg)
136 {
137 int error;
138
139 switch (cmd) {
140 case MODULE_CMD_INIT:
141 error = vfs_attach(&cd9660_vfsops);
142 if (error != 0)
143 break;
144 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
145 CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660",
146 SYSCTL_DESCR("ISO-9660 file system"),
147 NULL, 0, NULL, 0,
148 CTL_VFS, 14, CTL_EOL);
149 sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL,
150 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
151 CTLTYPE_INT, "utf8_joliet",
152 SYSCTL_DESCR("Encode Joliet filenames to UTF-8"),
153 NULL, 0, &cd9660_utf8_joliet, 0,
154 CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL);
155 /*
156 * XXX the "14" above could be dynamic, thereby eliminating
157 * one more instance of the "number to vfs" mapping problem,
158 * but "14" is the order as taken from sys/mount.h
159 */
160 break;
161 case MODULE_CMD_FINI:
162 error = vfs_detach(&cd9660_vfsops);
163 if (error != 0)
164 break;
165 sysctl_teardown(&cd9660_sysctl_log);
166 break;
167 default:
168 error = ENOTTY;
169 break;
170 }
171
172 return (error);
173 }
174
175 int
cd9660_mountroot(void)176 cd9660_mountroot(void)
177 {
178 struct mount *mp;
179 struct lwp *l = curlwp;
180 int error;
181 struct iso_args args;
182
183 if (device_class(root_device) != DV_DISK)
184 return (ENODEV);
185
186 if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
187 != 0) {
188 vrele(rootvp);
189 return (error);
190 }
191
192 args.flags = ISOFSMNT_ROOT;
193 if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
194 vfs_unbusy(mp, false, NULL);
195 vfs_destroy(mp);
196 return (error);
197 }
198 mountlist_append(mp);
199 (void)cd9660_statvfs(mp, &mp->mnt_stat);
200 vfs_unbusy(mp, false, NULL);
201 return (0);
202 }
203
204 /*
205 * VFS Operations.
206 *
207 * mount system call
208 */
209 int
cd9660_mount(struct mount * mp,const char * path,void * data,size_t * data_len)210 cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
211 {
212 struct lwp *l = curlwp;
213 struct vnode *devvp;
214 struct iso_args *args = data;
215 int error;
216 struct iso_mnt *imp = VFSTOISOFS(mp);
217
218 if (args == NULL)
219 return EINVAL;
220 if (*data_len < sizeof *args)
221 return EINVAL;
222
223 if (mp->mnt_flag & MNT_GETARGS) {
224 if (imp == NULL)
225 return EIO;
226 args->fspec = NULL;
227 args->flags = imp->im_flags;
228 *data_len = sizeof (*args);
229 return 0;
230 }
231
232 if ((mp->mnt_flag & MNT_RDONLY) == 0)
233 return (EROFS);
234
235 if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
236 return EINVAL;
237
238 /*
239 * Not an update, or updating the name: look up the name
240 * and verify that it refers to a sensible block device.
241 */
242 error = namei_simple_user(args->fspec,
243 NSM_FOLLOW_NOEMULROOT, &devvp);
244 if (error != 0)
245 return (error);
246
247 if (devvp->v_type != VBLK) {
248 vrele(devvp);
249 return ENOTBLK;
250 }
251 if (bdevsw_lookup(devvp->v_rdev) == NULL) {
252 vrele(devvp);
253 return ENXIO;
254 }
255 /*
256 * If mount by non-root, then verify that user has necessary
257 * permissions on the device.
258 */
259 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
260 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
261 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD));
262 if (error) {
263 goto fail;
264 }
265 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
266 error = VOP_OPEN(devvp, FREAD, FSCRED);
267 if (error)
268 goto fail;
269 VOP_UNLOCK(devvp);
270 error = iso_mountfs(devvp, mp, l, args);
271 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
272 if (error) {
273 (void)VOP_CLOSE(devvp, FREAD, NOCRED);
274 goto fail;
275 }
276 VOP_UNLOCK(devvp);
277 /* reference to devvp is donated through iso_mountfs */
278 } else {
279 if (devvp != imp->im_devvp &&
280 devvp->v_rdev != imp->im_devvp->v_rdev) {
281 error = EINVAL; /* needs translation */
282 goto fail;
283 }
284 VOP_UNLOCK(devvp);
285 vrele(devvp);
286 }
287 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
288 mp->mnt_op->vfs_name, mp, l);
289
290 fail:
291 VOP_UNLOCK(devvp);
292 vrele(devvp);
293 return (error);
294 }
295
296 /*
297 * Make a mount point from a volume descriptor
298 */
299 static int
iso_makemp(struct iso_mnt * isomp,struct buf * bp,int * ea_len)300 iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len)
301 {
302 struct iso_primary_descriptor *pri;
303 int logical_block_size;
304 struct iso_directory_record *rootp;
305
306 pri = (struct iso_primary_descriptor *)bp->b_data;
307
308 logical_block_size = isonum_723 (pri->logical_block_size);
309
310 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
311 || (logical_block_size & (logical_block_size - 1)) != 0)
312 return -1;
313
314 rootp = (struct iso_directory_record *)pri->root_directory_record;
315
316 isomp->logical_block_size = logical_block_size;
317 isomp->volume_space_size = isonum_733 (pri->volume_space_size);
318 memcpy(isomp->root, rootp, sizeof(isomp->root));
319 isomp->root_extent = isonum_733 (rootp->extent);
320 isomp->root_size = isonum_733 (rootp->size);
321 isomp->im_joliet_level = 0;
322
323 isomp->im_bmask = logical_block_size - 1;
324 isomp->im_bshift = 0;
325 while ((1 << isomp->im_bshift) < isomp->logical_block_size)
326 isomp->im_bshift++;
327
328 if (ea_len != NULL)
329 *ea_len = isonum_711(rootp->ext_attr_length);
330
331 return 0;
332 }
333
334 /*
335 * Common code for mount and mountroot
336 */
337 static int
iso_mountfs(struct vnode * devvp,struct mount * mp,struct lwp * l,struct iso_args * argp)338 iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l,
339 struct iso_args *argp)
340 {
341 struct iso_mnt *isomp = (struct iso_mnt *)0;
342 struct buf *bp = NULL, *pribp = NULL, *supbp = NULL;
343 dev_t dev = devvp->v_rdev;
344 int error = EINVAL;
345 int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
346 int iso_bsize;
347 int iso_blknum;
348 int joliet_level;
349 struct iso_volume_descriptor *vdp;
350 struct iso_supplementary_descriptor *sup;
351 int sess = 0;
352 int ext_attr_length;
353 struct disklabel label;
354
355 if (!ronly)
356 return EROFS;
357
358 /* Flush out any old buffers remaining from a previous use. */
359 if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0)
360 return (error);
361
362 /* This is the "logical sector size". The standard says this
363 * should be 2048 or the physical sector size on the device,
364 * whichever is greater. For now, we'll just use a constant.
365 */
366 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
367
368 error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED);
369 if (!error) {
370 /* XXX more sanity checks? */
371 sess = label.d_partitions[DISKPART(dev)].p_cdsession;
372 } else {
373 /* fallback to old method */
374 error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED);
375 if (error)
376 sess = 0; /* never mind */
377 }
378 #ifdef ISO_DEBUG
379 printf("isofs: session offset (part %"PRId32") %d\n", DISKPART(dev), sess);
380 #endif
381
382 for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
383 if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize),
384 iso_bsize, 0, &bp)) != 0)
385 goto out;
386
387 vdp = (struct iso_volume_descriptor *)bp->b_data;
388 if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) {
389 error = EINVAL;
390 goto out;
391 }
392
393 switch (isonum_711(vdp->type)) {
394 case ISO_VD_PRIMARY:
395 if (pribp == NULL) {
396 pribp = bp;
397 bp = NULL;
398 }
399 break;
400
401 case ISO_VD_SUPPLEMENTARY:
402 if (supbp == NULL) {
403 supbp = bp;
404 bp = NULL;
405 }
406 break;
407
408 default:
409 break;
410 }
411
412 if (isonum_711 (vdp->type) == ISO_VD_END) {
413 brelse(bp, 0);
414 bp = NULL;
415 break;
416 }
417
418 if (bp != NULL) {
419 brelse(bp, 0);
420 bp = NULL;
421 }
422 }
423
424 if (pribp == NULL) {
425 error = EINVAL;
426 goto out;
427 }
428
429 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
430 memset(isomp, 0, sizeof *isomp);
431 if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) {
432 error = EINVAL;
433 goto out;
434 }
435
436 isomp->volume_space_size += sess;
437
438 brelse(pribp, BC_AGE);
439 pribp = NULL;
440
441 mp->mnt_data = isomp;
442 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
443 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660);
444 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
445 mp->mnt_stat.f_namemax = ISO_MAXNAMLEN;
446 mp->mnt_flag |= MNT_LOCAL;
447 mp->mnt_iflag |= IMNT_MPSAFE;
448 mp->mnt_dev_bshift = iso_bsize;
449 mp->mnt_fs_bshift = isomp->im_bshift;
450 isomp->im_mountp = mp;
451 isomp->im_dev = dev;
452 isomp->im_devvp = devvp;
453
454 /* Check the Rock Ridge Extension support */
455 if (!(argp->flags & ISOFSMNT_NORRIP)) {
456 struct iso_directory_record *rootp;
457
458 if ((error = bread(isomp->im_devvp,
459 (isomp->root_extent + ext_attr_length) <<
460 (isomp->im_bshift - DEV_BSHIFT),
461 isomp->logical_block_size,
462 0, &bp)) != 0)
463 goto out;
464
465 rootp = (struct iso_directory_record *)bp->b_data;
466
467 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
468 argp->flags |= ISOFSMNT_NORRIP;
469 } else {
470 argp->flags &= ~ISOFSMNT_GENS;
471 }
472
473 /*
474 * The contents are valid,
475 * but they will get reread as part of another vnode, so...
476 */
477 brelse(bp, BC_AGE);
478 bp = NULL;
479 }
480 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
481 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS);
482
483 if (isomp->im_flags & ISOFSMNT_GENS)
484 isomp->iso_ftype = ISO_FTYPE_9660;
485 else if (isomp->im_flags & ISOFSMNT_NORRIP) {
486 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
487 if (argp->flags & ISOFSMNT_NOCASETRANS)
488 isomp->im_flags |= ISOFSMNT_NOCASETRANS;
489 } else
490 isomp->iso_ftype = ISO_FTYPE_RRIP;
491
492 /* Check the Joliet Extension support */
493 if ((argp->flags & ISOFSMNT_NORRIP) != 0 &&
494 (argp->flags & ISOFSMNT_NOJOLIET) == 0 &&
495 supbp != NULL) {
496 joliet_level = 0;
497 sup = (struct iso_supplementary_descriptor *)supbp->b_data;
498
499 if ((isonum_711(sup->flags) & 1) == 0) {
500 if (memcmp(sup->escape, "%/@", 3) == 0)
501 joliet_level = 1;
502 if (memcmp(sup->escape, "%/C", 3) == 0)
503 joliet_level = 2;
504 if (memcmp(sup->escape, "%/E", 3) == 0)
505 joliet_level = 3;
506 }
507 if (joliet_level != 0) {
508 if (iso_makemp(isomp, supbp, NULL) == -1) {
509 error = EINVAL;
510 goto out;
511 }
512 isomp->im_joliet_level = joliet_level;
513 }
514 }
515
516 if (supbp != NULL) {
517 brelse(supbp, 0);
518 supbp = NULL;
519 }
520
521 spec_node_setmountedfs(devvp, mp);
522
523 return 0;
524 out:
525 if (bp)
526 brelse(bp, 0);
527 if (pribp)
528 brelse(pribp, 0);
529 if (supbp)
530 brelse(supbp, 0);
531 if (isomp) {
532 free(isomp, M_ISOFSMNT);
533 mp->mnt_data = NULL;
534 }
535 return error;
536 }
537
538 /*
539 * Make a filesystem operational.
540 * Nothing to do at the moment.
541 */
542 /* ARGSUSED */
543 int
cd9660_start(struct mount * mp,int flags)544 cd9660_start(struct mount *mp, int flags)
545 {
546 return 0;
547 }
548
549 /*
550 * unmount system call
551 */
552 int
cd9660_unmount(struct mount * mp,int mntflags)553 cd9660_unmount(struct mount *mp, int mntflags)
554 {
555 struct iso_mnt *isomp;
556 int error, flags = 0;
557
558 if (mntflags & MNT_FORCE)
559 flags |= FORCECLOSE;
560 if ((error = vflush(mp, NULLVP, flags)) != 0)
561 return (error);
562
563 isomp = VFSTOISOFS(mp);
564
565 if (isomp->im_devvp->v_type != VBAD)
566 spec_node_setmountedfs(isomp->im_devvp, NULL);
567
568 vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY);
569 error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED);
570 vput(isomp->im_devvp);
571 free(isomp, M_ISOFSMNT);
572 mp->mnt_data = NULL;
573 mp->mnt_flag &= ~MNT_LOCAL;
574 return (error);
575 }
576
577 /*
578 * Return root of a filesystem
579 */
580 int
cd9660_root(struct mount * mp,struct vnode ** vpp)581 cd9660_root(struct mount *mp, struct vnode **vpp)
582 {
583 struct iso_mnt *imp = VFSTOISOFS(mp);
584 struct iso_directory_record *dp =
585 (struct iso_directory_record *)imp->root;
586 ino_t ino = isodirino(dp, imp);
587
588 return cd9660_vget(mp, ino, vpp);
589 }
590
591 /*
592 * Get file system statistics.
593 */
594 int
cd9660_statvfs(struct mount * mp,struct statvfs * sbp)595 cd9660_statvfs(struct mount *mp, struct statvfs *sbp)
596 {
597 struct iso_mnt *isomp;
598
599 isomp = VFSTOISOFS(mp);
600
601 sbp->f_bsize = isomp->logical_block_size;
602 sbp->f_frsize = sbp->f_bsize;
603 sbp->f_iosize = sbp->f_bsize; /* XXX */
604 sbp->f_blocks = isomp->volume_space_size;
605 sbp->f_bfree = 0; /* total free blocks */
606 sbp->f_bavail = 0; /* blocks free for non superuser */
607 sbp->f_bresvd = 0; /* total reserved blocks */
608 sbp->f_files = 0; /* total files */
609 sbp->f_ffree = 0; /* free file nodes */
610 sbp->f_favail = 0; /* free file nodes for non superuser */
611 sbp->f_fresvd = 0; /* reserved file nodes */
612 copy_statvfs_info(sbp, mp);
613 /* Use the first spare for flags: */
614 sbp->f_spare[0] = isomp->im_flags;
615 return 0;
616 }
617
618 /* ARGSUSED */
619 int
cd9660_sync(struct mount * mp,int waitfor,kauth_cred_t cred)620 cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
621 {
622 return 0;
623 }
624
625 /*
626 * File handle to vnode
627 *
628 * Have to be really careful about stale file handles:
629 * - check that the inode number is in range
630 * - call iget() to get the locked inode
631 * - check for an unallocated inode (i_mode == 0)
632 * - check that the generation number matches
633 */
634
635 struct ifid {
636 ushort ifid_len;
637 ushort ifid_pad;
638 ino_t ifid_ino;
639 #ifdef ISOFS_DBG
640 u_long ifid_start;
641 #endif
642 };
643
644 /* ARGSUSED */
645 int
cd9660_fhtovp(struct mount * mp,struct fid * fhp,struct vnode ** vpp)646 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
647 {
648 struct ifid ifh;
649 struct iso_node *ip;
650 struct vnode *nvp;
651 int error;
652
653 if (fhp->fid_len != sizeof(ifh))
654 return EINVAL;
655
656 memcpy(&ifh, fhp, sizeof(ifh));
657 #ifdef ISOFS_DBG
658 printf("fhtovp: ino %"PRIu64", start %lu\n",
659 ifh.ifid_ino, ifh.ifid_start);
660 #endif
661
662 if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) {
663 *vpp = NULLVP;
664 return (error);
665 }
666 ip = VTOI(nvp);
667 if (ip->inode.iso_mode == 0) {
668 vput(nvp);
669 *vpp = NULLVP;
670 return (ESTALE);
671 }
672 *vpp = nvp;
673 return (0);
674 }
675
676 int
cd9660_vget(struct mount * mp,ino_t ino,struct vnode ** vpp)677 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
678 {
679 int error;
680
681 error = vcache_get(mp, &ino, sizeof(ino), vpp);
682 if (error)
683 return error;
684 error = vn_lock(*vpp, LK_EXCLUSIVE);
685 if (error) {
686 vrele(*vpp);
687 *vpp = NULL;
688 return error;
689 }
690 return 0;
691 }
692
693 int
cd9660_loadvnode(struct mount * mp,struct vnode * vp,const void * key,size_t key_len,const void ** new_key)694 cd9660_loadvnode(struct mount *mp, struct vnode *vp,
695 const void *key, size_t key_len, const void **new_key)
696 {
697 struct iso_mnt *imp;
698 struct iso_node *ip;
699 struct iso_directory_record *isodir;
700 struct buf *bp;
701 dev_t dev;
702 ino_t ino;
703 int lbn, off;
704 int error;
705
706 KASSERT(key_len == sizeof(ino));
707 memcpy(&ino, key, key_len);
708 imp = VFSTOISOFS(mp);
709 dev = imp->im_dev;
710
711 ip = pool_get(&cd9660_node_pool, PR_WAITOK);
712
713 memset(ip, 0, sizeof(struct iso_node));
714 ip->i_vnode = vp;
715 ip->i_dev = dev;
716 ip->i_number = ino;
717 ip->i_mnt = imp;
718 ip->i_devvp = imp->im_devvp;
719
720 lbn = cd9660_lblkno(imp, ino);
721 if (lbn >= imp->volume_space_size) {
722 pool_put(&cd9660_node_pool, ip);
723 printf("fhtovp: lbn exceed volume space %d\n", lbn);
724 return (ESTALE);
725 }
726
727 off = cd9660_blkoff(imp, ino);
728 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
729 pool_put(&cd9660_node_pool, ip);
730 printf("fhtovp: crosses block boundary %d\n",
731 off + ISO_DIRECTORY_RECORD_SIZE);
732 return (ESTALE);
733 }
734
735 error = bread(imp->im_devvp,
736 lbn << (imp->im_bshift - DEV_BSHIFT),
737 imp->logical_block_size, 0, &bp);
738 if (error) {
739 pool_put(&cd9660_node_pool, ip);
740 printf("fhtovp: bread error %d\n",error);
741 return (error);
742 }
743 isodir = (struct iso_directory_record *)((char *)bp->b_data + off);
744
745 if (off + isonum_711(isodir->length) > imp->logical_block_size) {
746 pool_put(&cd9660_node_pool, ip);
747 brelse(bp, 0);
748 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
749 off +isonum_711(isodir->length), off,
750 isonum_711(isodir->length));
751 return (ESTALE);
752 }
753
754 #if 0
755 if (isonum_733(isodir->extent) +
756 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
757 pool_put(&cd9660_node_pool, ip);
758 if (bp != 0)
759 brelse(bp, 0);
760 printf("fhtovp: file start miss %d vs %d\n",
761 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
762 ifhp->ifid_start);
763 return (ESTALE);
764 }
765 #endif
766
767 ip->iso_extent = isonum_733(isodir->extent);
768 ip->i_size = isonum_733(isodir->size);
769 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
770
771 vp->v_tag = VT_ISOFS;
772 vp->v_op = cd9660_vnodeop_p;
773 vp->v_data = ip;
774 genfs_node_init(vp, &cd9660_genfsops);
775
776 /*
777 * Setup time stamp, attribute
778 */
779 switch (imp->iso_ftype) {
780 default: /* ISO_FTYPE_9660 */
781 {
782 struct buf *bp2;
783 if ((imp->im_flags & ISOFSMNT_EXTATT)
784 && (off = isonum_711(isodir->ext_attr_length)))
785 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift),
786 NULL, &bp2);
787 else
788 bp2 = NULL;
789 cd9660_defattr(isodir, ip, bp2);
790 cd9660_deftstamp(isodir, ip, bp2);
791 if (bp2)
792 brelse(bp2, 0);
793 break;
794 }
795 case ISO_FTYPE_RRIP:
796 cd9660_rrip_analyze(isodir, ip, imp);
797 break;
798 }
799
800 brelse(bp, 0);
801
802 /*
803 * Initialize the associated vnode
804 */
805 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
806 case VFIFO:
807 vp->v_op = cd9660_fifoop_p;
808 break;
809 case VCHR:
810 case VBLK:
811 /*
812 * if device, look at device number table for translation
813 */
814 vp->v_op = cd9660_specop_p;
815 spec_node_init(vp, ip->inode.iso_rdev);
816 break;
817 case VLNK:
818 case VNON:
819 case VSOCK:
820 case VDIR:
821 case VBAD:
822 break;
823 case VREG:
824 uvm_vnp_setsize(vp, ip->i_size);
825 break;
826 }
827
828 if (vp->v_type != VREG)
829 uvm_vnp_setsize(vp, 0);
830
831 if (ip->iso_extent == imp->root_extent)
832 vp->v_vflag |= VV_ROOT;
833
834 /*
835 * XXX need generation number?
836 */
837
838 *new_key = &ip->i_number;
839 return 0;
840 }
841
842 /*
843 * Vnode pointer to File handle
844 */
845 /* ARGSUSED */
846 int
cd9660_vptofh(struct vnode * vp,struct fid * fhp,size_t * fh_size)847 cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
848 {
849 struct iso_node *ip = VTOI(vp);
850 struct ifid ifh;
851
852 if (*fh_size < sizeof(struct ifid)) {
853 *fh_size = sizeof(struct ifid);
854 return E2BIG;
855 }
856 *fh_size = sizeof(struct ifid);
857
858 memset(&ifh, 0, sizeof(ifh));
859 ifh.ifid_len = sizeof(struct ifid);
860 ifh.ifid_ino = ip->i_number;
861 #ifdef ISOFS_DBG
862 ifh.ifid_start = ip->iso_start;
863 #endif
864 memcpy(fhp, &ifh, sizeof(ifh));
865
866 #ifdef ISOFS_DBG
867 printf("vptofh: ino %"PRIu64", start %lu\n",
868 ifh.ifid_ino,ifh.ifid_start);
869 #endif
870 return 0;
871 }
872