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Merge commit 'd6e1c446d7897003fd9fd36ef5aa7da350b7f6af' into merges
[unleashed.git] / kernel / fs / udfs / udf_vfsops.c
blob7959a5a37249422d9288172c2c830cc0edb2296c
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
25 * Copyright (c) 2017 by Delphix. All rights reserved.
26 */
27
28 #include <sys/types.h>
29 #include <sys/t_lock.h>
30 #include <sys/param.h>
31 #include <sys/time.h>
32 #include <sys/systm.h>
33 #include <sys/sysmacros.h>
34 #include <sys/resource.h>
35 #include <sys/signal.h>
36 #include <sys/cred.h>
37 #include <sys/user.h>
38 #include <sys/buf.h>
39 #include <sys/vfs.h>
40 #include <sys/stat.h>
41 #include <sys/vnode.h>
42 #include <sys/mode.h>
43 #include <sys/proc.h>
44 #include <sys/disp.h>
45 #include <sys/file.h>
46 #include <sys/fcntl.h>
47 #include <sys/flock.h>
48 #include <sys/kmem.h>
49 #include <sys/uio.h>
50 #include <sys/dnlc.h>
51 #include <sys/conf.h>
52 #include <sys/errno.h>
53 #include <sys/mman.h>
54 #include <sys/fbuf.h>
55 #include <sys/pathname.h>
56 #include <sys/debug.h>
57 #include <sys/vmsystm.h>
58 #include <sys/cmn_err.h>
59 #include <sys/dirent.h>
60 #include <sys/errno.h>
61 #include <sys/modctl.h>
62 #include <sys/statvfs.h>
63 #include <sys/mount.h>
64 #include <sys/sunddi.h>
65 #include <sys/bootconf.h>
66 #include <sys/policy.h>
67
68 #include <vm/hat.h>
69 #include <vm/page.h>
70 #include <vm/pvn.h>
71 #include <vm/as.h>
72 #include <vm/seg.h>
73 #include <vm/seg_map.h>
74 #include <vm/seg_kmem.h>
75 #include <vm/seg_vn.h>
76 #include <vm/rm.h>
77 #include <vm/page.h>
78 #include <sys/swap.h>
79 #include <sys/mntent.h>
80
81
82 #include <sys/fs_subr.h>
83
84
85 #include <sys/fs/udf_volume.h>
86 #include <sys/fs/udf_inode.h>
87
88
89 extern struct vnode *common_specvp(struct vnode *vp);
90
91 extern kmutex_t ud_sync_busy;
92 static int32_t ud_mountfs(struct vfs *,
93 enum whymountroot, dev_t, char *, struct cred *, int32_t);
94 static struct udf_vfs *ud_validate_and_fill_superblock(dev_t,
95 int32_t, uint32_t);
96 void ud_destroy_fsp(struct udf_vfs *);
97 void ud_convert_to_superblock(struct udf_vfs *,
98 struct log_vol_int_desc *);
99 void ud_update_superblock(struct vfs *);
100 int32_t ud_get_last_block(dev_t, daddr_t *);
101 static int32_t ud_val_get_vat(struct udf_vfs *,
102 dev_t, daddr_t, struct ud_map *);
103 int32_t ud_read_sparing_tbls(struct udf_vfs *,
104 dev_t, struct ud_map *, struct pmap_typ2 *);
105 uint32_t ud_get_lbsize(dev_t, uint32_t *);
106
107 static int32_t udf_mount(struct vfs *,
108 struct vnode *, struct mounta *, struct cred *);
109 static int32_t udf_unmount(struct vfs *, int, struct cred *);
110 static int32_t udf_root(struct vfs *, struct vnode **);
111 static int32_t udf_statvfs(struct vfs *, struct statvfs64 *);
112 static int32_t udf_sync(struct vfs *, int16_t, struct cred *);
113 static int32_t udf_vget(struct vfs *, struct vnode **, struct fid *);
114 static int32_t udf_mountroot(struct vfs *vfsp, enum whymountroot);
115
116 static int udfinit(int, char *);
117
118 static mntopts_t udfs_mntopts;
119
120 static vfsdef_t vfw = {
121 VFSDEF_VERSION,
122 "udfs",
123 udfinit,
124 VSW_HASPROTO|VSW_CANREMOUNT|VSW_STATS|VSW_CANLOFI|VSW_MOUNTDEV,
125 &udfs_mntopts
126 };
127
128 static mntopts_t udfs_mntopts = {
129 0,
130 NULL
131 };
132
133 /*
134 * Module linkage information for the kernel.
135 */
136 extern struct mod_ops mod_fsops;
137
138 static struct modlfs modlfs = {
139 &mod_fsops, "filesystem for UDFS", &vfw
140 };
141
142 static struct modlinkage modlinkage = {
143 MODREV_1, (void *)&modlfs, NULL
144 };
145
146 int32_t udf_fstype = -1;
147
148 int
149 _init()
150 {
151 return (mod_install(&modlinkage));
152 }
153
154 int
155 _fini()
156 {
157 return (EBUSY);
158 }
159
160 int
161 _info(struct modinfo *modinfop)
162 {
163 return (mod_info(&modlinkage, modinfop));
164 }
165
166
167 /* -------------------- vfs routines -------------------- */
168
169 /*
170 * XXX - this appears only to be used by the VM code to handle the case where
171 * UNIX is running off the mini-root. That probably wants to be done
172 * differently.
173 */
174 struct vnode *rootvp;
175 _NOTE(SCHEME_PROTECTS_DATA("safe sharing", rootvp))
176 static int32_t
177 udf_mount(struct vfs *vfsp, struct vnode *mvp,
178 struct mounta *uap, struct cred *cr)
179 {
180 dev_t dev;
181 struct vnode *lvp = NULL;
182 struct vnode *svp = NULL;
183 struct pathname dpn;
184 int32_t error;
185 enum whymountroot why;
186 int oflag, aflag;
187
188 ud_printf("udf_mount\n");
189
190 if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) {
191 return (error);
192 }
193
194 if (mvp->v_type != VDIR) {
195 return (ENOTDIR);
196 }
197
198 mutex_enter(&mvp->v_lock);
199 if ((uap->flags & MS_REMOUNT) == 0 &&
200 (uap->flags & MS_OVERLAY) == 0 &&
201 (mvp->v_count != 1 || (mvp->v_flag & VROOT))) {
202 mutex_exit(&mvp->v_lock);
203 return (EBUSY);
204 }
205 mutex_exit(&mvp->v_lock);
206
207 if (error = pn_get(uap->dir, UIO_USERSPACE, &dpn)) {
208 return (error);
209 }
210
211 /*
212 * Resolve path name of the file being mounted.
213 */
214 if (error = lookupname(uap->spec, UIO_USERSPACE, FOLLOW, NULLVPP,
215 &svp)) {
216 pn_free(&dpn);
217 return (error);
218 }
219
220 error = vfs_get_lofi(vfsp, &lvp);
221
222 if (error > 0) {
223 if (error == ENOENT)
224 error = ENODEV;
225 goto out;
226 } else if (error == 0) {
227 dev = lvp->v_rdev;
228 } else {
229 dev = svp->v_rdev;
230
231 if (svp->v_type != VBLK) {
232 error = ENOTBLK;
233 goto out;
234 }
235 }
236
237 /*
238 * Ensure that this device isn't already mounted,
239 * unless this is a REMOUNT request
240 */
241 if (vfs_devmounting(dev, vfsp)) {
242 error = EBUSY;
243 goto out;
244 }
245 if (vfs_devismounted(dev)) {
246 if (uap->flags & MS_REMOUNT) {
247 why = ROOT_REMOUNT;
248 } else {
249 error = EBUSY;
250 goto out;
251 }
252 } else {
253 why = ROOT_INIT;
254 }
255 if (getmajor(dev) >= devcnt) {
256 error = ENXIO;
257 goto out;
258 }
259
260 /*
261 * If the device is a tape, mount it read only
262 */
263 if (devopsp[getmajor(dev)]->devo_cb_ops->cb_flag & D_TAPE) {
264 vfsp->vfs_flag |= VFS_RDONLY;
265 }
266
267 if (uap->flags & MS_RDONLY) {
268 vfsp->vfs_flag |= VFS_RDONLY;
269 }
270
271 /*
272 * Set mount options.
273 */
274 if (uap->flags & MS_RDONLY) {
275 vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0);
276 }
277 if (uap->flags & MS_NOSUID) {
278 vfs_setmntopt(vfsp, MNTOPT_NOSUID, NULL, 0);
279 }
280
281 /*
282 * Verify that the caller can open the device special file as
283 * required. It is not until this moment that we know whether
284 * we're mounting "ro" or not.
285 */
286 if ((vfsp->vfs_flag & VFS_RDONLY) != 0) {
287 oflag = FREAD;
288 aflag = VREAD;
289 } else {
290 oflag = FREAD | FWRITE;
291 aflag = VREAD | VWRITE;
292 }
293
294 if (lvp == NULL &&
295 (error = secpolicy_spec_open(cr, svp, oflag)) != 0)
296 goto out;
297
298 if ((error = fop_access(svp, aflag, 0, cr, NULL)) != 0)
299 goto out;
300
301 /*
302 * Mount the filesystem.
303 */
304 error = ud_mountfs(vfsp, why, dev, dpn.pn_path, cr, 0);
305 out:
306 VN_RELE(svp);
307 if (lvp != NULL)
308 VN_RELE(lvp);
309 pn_free(&dpn);
310 return (error);
311 }
312
313
314
315 /*
316 * unmount the file system pointed
317 * by vfsp
318 */
319 /* ARGSUSED */
320 static int32_t
321 udf_unmount(struct vfs *vfsp, int fflag, struct cred *cr)
322 {
323 struct udf_vfs *udf_vfsp;
324 struct vnode *bvp, *rvp;
325 struct ud_inode *rip;
326 int32_t flag;
327
328 ud_printf("udf_unmount\n");
329
330 if (secpolicy_fs_unmount(cr, vfsp) != 0) {
331 return (EPERM);
332 }
333
334 /*
335 * forced unmount is not supported by this file system
336 * and thus, ENOTSUP, is being returned.
337 */
338 if (fflag & MS_FORCE)
339 return (ENOTSUP);
340
341 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
342 flag = !(udf_vfsp->udf_flags & UDF_FL_RDONLY);
343 bvp = udf_vfsp->udf_devvp;
344
345 rvp = udf_vfsp->udf_root;
346 ASSERT(rvp != NULL);
347 rip = VTOI(rvp);
348
349 (void) ud_release_cache(udf_vfsp);
350
351
352 /* Flush all inodes except root */
353 if (ud_iflush(vfsp) < 0) {
354 return (EBUSY);
355 }
356
357 rw_enter(&rip->i_contents, RW_WRITER);
358 (void) ud_syncip(rip, B_INVAL, I_SYNC);
359 rw_exit(&rip->i_contents);
360
361 mutex_enter(&ud_sync_busy);
362 if ((udf_vfsp->udf_flags & UDF_FL_RDONLY) == 0) {
363 bflush(vfsp->vfs_dev);
364 mutex_enter(&udf_vfsp->udf_lock);
365 udf_vfsp->udf_clean = UDF_CLEAN;
366 mutex_exit(&udf_vfsp->udf_lock);
367 ud_update_superblock(vfsp);
368 }
369 mutex_exit(&ud_sync_busy);
370
371 mutex_destroy(&udf_vfsp->udf_lock);
372 mutex_destroy(&udf_vfsp->udf_rename_lck);
373
374 ud_delcache(rip);
375 ITIMES(rip);
376 VN_RELE(rvp);
377
378 ud_destroy_fsp(udf_vfsp);
379
380 (void) fop_putpage(bvp, 0, 0, B_INVAL, cr, NULL);
381 (void) fop_close(bvp, flag, 1, 0, cr, NULL);
382
383 (void) bfinval(vfsp->vfs_dev, 1);
384 VN_RELE(bvp);
385
386
387 return (0);
388 }
389
390
391 /*
392 * Get the root vp for the
393 * file system
394 */
395 static int32_t
396 udf_root(struct vfs *vfsp, struct vnode **vpp)
397 {
398 struct udf_vfs *udf_vfsp;
399 struct vnode *vp;
400
401 ud_printf("udf_root\n");
402
403 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
404
405 ASSERT(udf_vfsp != NULL);
406 ASSERT(udf_vfsp->udf_root != NULL);
407
408 vp = udf_vfsp->udf_root;
409 VN_HOLD(vp);
410 *vpp = vp;
411 return (0);
412 }
413
414
415 /*
416 * Get file system statistics.
417 */
418 static int32_t
419 udf_statvfs(struct vfs *vfsp, struct statvfs64 *sp)
420 {
421 struct udf_vfs *udf_vfsp;
422 struct ud_part *parts;
423 dev32_t d32;
424 int32_t index;
425
426 ud_printf("udf_statvfs\n");
427
428 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
429 (void) bzero(sp, sizeof (struct statvfs64));
430
431 mutex_enter(&udf_vfsp->udf_lock);
432 sp->f_bsize = udf_vfsp->udf_lbsize;
433 sp->f_frsize = udf_vfsp->udf_lbsize;
434 sp->f_blocks = 0;
435 sp->f_bfree = 0;
436 parts = udf_vfsp->udf_parts;
437 for (index = 0; index < udf_vfsp->udf_npart; index++) {
438 sp->f_blocks += parts->udp_nblocks;
439 sp->f_bfree += parts->udp_nfree;
440 parts++;
441 }
442 sp->f_bavail = sp->f_bfree;
443
444 /*
445 * Since there are no real inodes allocated
446 * we will approximate
447 * each new file will occupy :
448 * 38(over head each dent) + MAXNAMLEN / 2 + inode_size(==block size)
449 */
450 sp->f_ffree = sp->f_favail =
451 (sp->f_bavail * sp->f_bsize) / (146 + sp->f_bsize);
452
453 /*
454 * The total number of inodes is
455 * the sum of files + directories + free inodes
456 */
457 sp->f_files = sp->f_ffree + udf_vfsp->udf_nfiles + udf_vfsp->udf_ndirs;
458 (void) cmpldev(&d32, vfsp->vfs_dev);
459 sp->f_fsid = d32;
460 (void) strcpy(sp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name);
461 sp->f_flag = vf_to_stf(vfsp->vfs_flag);
462 sp->f_namemax = MAXNAMLEN;
463 (void) strcpy(sp->f_fstr, udf_vfsp->udf_volid);
464
465 mutex_exit(&udf_vfsp->udf_lock);
466
467 return (0);
468 }
469
470
471 /*
472 * Flush any pending I/O to file system vfsp.
473 * The ud_update() routine will only flush *all* udf files.
474 */
475 /*ARGSUSED*/
476 /* ARGSUSED */
477 static int32_t
478 udf_sync(struct vfs *vfsp, int16_t flag, struct cred *cr)
479 {
480 ud_printf("udf_sync\n");
481
482 ud_update(flag);
483 return (0);
484 }
485
486
487
488 /* ARGSUSED */
489 static int32_t
490 udf_vget(struct vfs *vfsp, struct vnode **vpp, struct fid *fidp)
491 {
492 int32_t error = 0;
493 struct udf_fid *udfid;
494 struct udf_vfs *udf_vfsp;
495 struct ud_inode *ip;
496
497 ud_printf("udf_vget\n");
498
499 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
500 if (udf_vfsp == NULL) {
501 *vpp = NULL;
502 return (0);
503 }
504
505 udfid = (struct udf_fid *)fidp;
506 if ((error = ud_iget(vfsp, udfid->udfid_prn,
507 udfid->udfid_icb_lbn, &ip, NULL, CRED())) != 0) {
508 *vpp = NULL;
509 return (error);
510 }
511
512 rw_enter(&ip->i_contents, RW_READER);
513 if ((udfid->udfid_uinq_lo != (ip->i_uniqid & 0xffffffff)) ||
514 (udfid->udfid_prn != ip->i_icb_prn)) {
515 rw_exit(&ip->i_contents);
516 VN_RELE(ITOV(ip));
517 *vpp = NULL;
518 return (EINVAL);
519 }
520 rw_exit(&ip->i_contents);
521
522 *vpp = ITOV(ip);
523 return (0);
524 }
525
526
527 /*
528 * Mount root file system.
529 * "why" is ROOT_INIT on initial call, ROOT_REMOUNT if called to
530 * remount the root file system, and ROOT_UNMOUNT if called to
531 * unmount the root (e.g., as part of a system shutdown).
532 *
533 * XXX - this may be partially machine-dependent; it, along with the VFS_SWAPVP
534 * operation, goes along with auto-configuration. A mechanism should be
535 * provided by which machine-INdependent code in the kernel can say "get me the
536 * right root file system" and "get me the right initial swap area", and have
537 * that done in what may well be a machine-dependent fashion.
538 * Unfortunately, it is also file-system-type dependent (NFS gets it via
539 * bootparams calls, UFS gets it from various and sundry machine-dependent
540 * mechanisms, as SPECFS does for swap).
541 */
542 /* ARGSUSED */
543 static int32_t
544 udf_mountroot(struct vfs *vfsp, enum whymountroot why)
545 {
546 dev_t rootdev;
547 static int32_t udf_rootdone = 0;
548 struct vnode *vp = NULL;
549 int32_t ovflags, error;
550 ud_printf("udf_mountroot\n");
551
552 if (why == ROOT_INIT) {
553 if (udf_rootdone++) {
554 return (EBUSY);
555 }
556 rootdev = getrootdev();
557 if (rootdev == (dev_t)NODEV) {
558 return (ENODEV);
559 }
560 vfsp->vfs_dev = rootdev;
561 vfsp->vfs_flag |= VFS_RDONLY;
562 } else if (why == ROOT_REMOUNT) {
563 vp = ((struct udf_vfs *)vfsp->vfs_data)->udf_devvp;
564 (void) dnlc_purge_vfsp(vfsp, 0);
565 vp = common_specvp(vp);
566 (void) fop_putpage(vp, 0,
567 0, B_INVAL, CRED(), NULL);
568 binval(vfsp->vfs_dev);
569
570 ovflags = vfsp->vfs_flag;
571 vfsp->vfs_flag &= ~VFS_RDONLY;
572 vfsp->vfs_flag |= VFS_REMOUNT;
573 rootdev = vfsp->vfs_dev;
574 } else if (why == ROOT_UNMOUNT) {
575 ud_update(0);
576 vp = ((struct udf_vfs *)vfsp->vfs_data)->udf_devvp;
577 (void) fop_close(vp, FREAD|FWRITE, 1,
578 0, CRED(), NULL);
579 return (0);
580 }
581
582 if ((error = vfs_lock(vfsp)) != 0) {
583 return (error);
584 }
585
586 error = ud_mountfs(vfsp, why, rootdev, "/", CRED(), 1);
587 if (error) {
588 vfs_unlock(vfsp);
589 if (why == ROOT_REMOUNT) {
590 vfsp->vfs_flag = ovflags;
591 }
592 if (rootvp) {
593 VN_RELE(rootvp);
594 rootvp = NULL;
595 }
596 return (error);
597 }
598
599 if (why == ROOT_INIT) {
600 vfs_add(NULL, vfsp,
601 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0);
602 }
603 vfs_unlock(vfsp);
604 return (0);
605 }
606
607
608 /* ------------------------- local routines ------------------------- */
609
610
611 static int32_t
612 ud_mountfs(struct vfs *vfsp, enum whymountroot why, dev_t dev, char *name,
613 struct cred *cr, int32_t isroot)
614 {
615 struct vnode *devvp = NULL;
616 int32_t error = 0;
617 int32_t needclose = 0;
618 struct udf_vfs *udf_vfsp = NULL;
619 struct log_vol_int_desc *lvid;
620 struct ud_inode *rip = NULL;
621 struct vnode *rvp = NULL;
622 int32_t i, lbsize;
623 uint32_t avd_loc;
624 struct ud_map *map;
625 int32_t desc_len;
626
627 ud_printf("ud_mountfs\n");
628
629 if (why == ROOT_INIT) {
630 /*
631 * Open the device.
632 */
633 devvp = makespecvp(dev, VBLK);
634
635 /*
636 * Open block device mounted on.
637 * When bio is fixed for vnodes this can all be vnode
638 * operations.
639 */
640 error = fop_open(&devvp,
641 (vfsp->vfs_flag & VFS_RDONLY) ? FREAD : FREAD|FWRITE,
642 cr, NULL);
643 if (error) {
644 goto out;
645 }
646 needclose = 1;
647
648 /*
649 * Refuse to go any further if this
650 * device is being used for swapping.
651 */
652 if (IS_SWAPVP(devvp)) {
653 error = EBUSY;
654 goto out;
655 }
656 }
657
658 /*
659 * check for dev already mounted on
660 */
661 if (vfsp->vfs_flag & VFS_REMOUNT) {
662 struct tag *ttag;
663 int32_t index, count;
664 struct buf *tpt = 0;
665 caddr_t addr;
666
667
668 /* cannot remount to RDONLY */
669 if (vfsp->vfs_flag & VFS_RDONLY) {
670 return (EINVAL);
671 }
672
673 if (vfsp->vfs_dev != dev) {
674 return (EINVAL);
675 }
676
677 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
678 devvp = udf_vfsp->udf_devvp;
679
680 /*
681 * fsck may have altered the file system; discard
682 * as much incore data as possible. Don't flush
683 * if this is a rw to rw remount; it's just resetting
684 * the options.
685 */
686 if (udf_vfsp->udf_flags & UDF_FL_RDONLY) {
687 (void) dnlc_purge_vfsp(vfsp, 0);
688 (void) fop_putpage(devvp, 0, 0,
689 B_INVAL, CRED(), NULL);
690 (void) ud_iflush(vfsp);
691 bflush(dev);
692 binval(dev);
693 }
694
695 /*
696 * We could read UDF1.50 and write UDF1.50 only
697 * disallow mount of any highier version
698 */
699 if ((udf_vfsp->udf_miread > UDF_150) ||
700 (udf_vfsp->udf_miwrite > UDF_150)) {
701 error = EINVAL;
702 goto remountout;
703 }
704
705 /*
706 * read/write to read/write; all done
707 */
708 if (udf_vfsp->udf_flags & UDF_FL_RW) {
709 goto remountout;
710 }
711
712 /*
713 * Does the media type allow a writable mount
714 */
715 if (udf_vfsp->udf_mtype != UDF_MT_OW) {
716 error = EINVAL;
717 goto remountout;
718 }
719
720 /*
721 * Read the metadata
722 * and check if it is possible to
723 * mount in rw mode
724 */
725 tpt = ud_bread(vfsp->vfs_dev,
726 udf_vfsp->udf_iseq_loc << udf_vfsp->udf_l2d_shift,
727 udf_vfsp->udf_iseq_len);
728 if (tpt->b_flags & B_ERROR) {
729 error = EIO;
730 goto remountout;
731 }
732 count = udf_vfsp->udf_iseq_len / DEV_BSIZE;
733 addr = tpt->b_un.b_addr;
734 for (index = 0; index < count; index ++) {
735 ttag = (struct tag *)(addr + index * DEV_BSIZE);
736 desc_len = udf_vfsp->udf_iseq_len - (index * DEV_BSIZE);
737 if (ud_verify_tag_and_desc(ttag, UD_LOG_VOL_INT,
738 udf_vfsp->udf_iseq_loc +
739 (index >> udf_vfsp->udf_l2d_shift),
740 1, desc_len) == 0) {
741 struct log_vol_int_desc *lvid;
742
743 lvid = (struct log_vol_int_desc *)ttag;
744
745 if (SWAP_32(lvid->lvid_int_type) !=
746 LOG_VOL_CLOSE_INT) {
747 error = EINVAL;
748 goto remountout;
749 }
750
751 /*
752 * Copy new data to old data
753 */
754 bcopy(udf_vfsp->udf_iseq->b_un.b_addr,
755 tpt->b_un.b_addr, udf_vfsp->udf_iseq_len);
756 break;
757 }
758 }
759
760 udf_vfsp->udf_flags = UDF_FL_RW;
761
762 mutex_enter(&udf_vfsp->udf_lock);
763 ud_sbwrite(udf_vfsp);
764 mutex_exit(&udf_vfsp->udf_lock);
765 remountout:
766 if (tpt != NULL) {
767 tpt->b_flags = B_AGE | B_STALE;
768 brelse(tpt);
769 }
770 return (error);
771 }
772
773 ASSERT(devvp != 0);
774 /*
775 * Flush back any dirty pages on the block device to
776 * try and keep the buffer cache in sync with the page
777 * cache if someone is trying to use block devices when
778 * they really should be using the raw device.
779 */
780 (void) fop_putpage(common_specvp(devvp), 0,
781 0, B_INVAL, cr, NULL);
782
783
784 /*
785 * Check if the file system
786 * is a valid udfs and fill
787 * the required fields in udf_vfs
788 */
789 _NOTE(NO_COMPETING_THREADS_NOW);
790
791 if ((lbsize = ud_get_lbsize(dev, &avd_loc)) == 0) {
792 error = EINVAL;
793 goto out;
794 }
795
796 udf_vfsp = ud_validate_and_fill_superblock(dev, lbsize, avd_loc);
797 if (udf_vfsp == NULL) {
798 error = EINVAL;
799 goto out;
800 }
801
802 /*
803 * Fill in vfs private data
804 */
805 vfsp->vfs_fstype = udf_fstype;
806 vfs_make_fsid(&vfsp->vfs_fsid, dev, udf_fstype);
807 vfsp->vfs_data = (caddr_t)udf_vfsp;
808 vfsp->vfs_dev = dev;
809 vfsp->vfs_flag |= VFS_NOTRUNC;
810 udf_vfsp->udf_devvp = devvp;
811
812 udf_vfsp->udf_fsmnt = kmem_zalloc(strlen(name) + 1, KM_SLEEP);
813 (void) strcpy(udf_vfsp->udf_fsmnt, name);
814
815 udf_vfsp->udf_vfs = vfsp;
816 udf_vfsp->udf_rdclustsz = udf_vfsp->udf_wrclustsz = maxphys;
817
818 udf_vfsp->udf_mod = 0;
819
820
821 lvid = udf_vfsp->udf_lvid;
822 if (vfsp->vfs_flag & VFS_RDONLY) {
823 /*
824 * We could read only UDF1.50
825 * disallow mount of any highier version
826 */
827 if (udf_vfsp->udf_miread > UDF_150) {
828 error = EINVAL;
829 goto out;
830 }
831 udf_vfsp->udf_flags = UDF_FL_RDONLY;
832 if (SWAP_32(lvid->lvid_int_type) == LOG_VOL_CLOSE_INT) {
833 udf_vfsp->udf_clean = UDF_CLEAN;
834 } else {
835 /* Do we have a VAT at the end of the recorded media */
836 map = udf_vfsp->udf_maps;
837 for (i = 0; i < udf_vfsp->udf_nmaps; i++) {
838 if (map->udm_flags & UDM_MAP_VPM) {
839 break;
840 }
841 map++;
842 }
843 if (i == udf_vfsp->udf_nmaps) {
844 error = ENOSPC;
845 goto out;
846 }
847 udf_vfsp->udf_clean = UDF_CLEAN;
848 }
849 } else {
850 /*
851 * We could read UDF1.50 and write UDF1.50 only
852 * disallow mount of any highier version
853 */
854 if ((udf_vfsp->udf_miread > UDF_150) ||
855 (udf_vfsp->udf_miwrite > UDF_150)) {
856 error = EINVAL;
857 goto out;
858 }
859 /*
860 * Check if the media allows
861 * us to mount read/write
862 */
863 if (udf_vfsp->udf_mtype != UDF_MT_OW) {
864 error = EACCES;
865 goto out;
866 }
867
868 /*
869 * Check if we have VAT on a writable media
870 * we cannot use the media in presence of VAT
871 * Dent RW mount.
872 */
873 map = udf_vfsp->udf_maps;
874 ASSERT(map != NULL);
875 for (i = 0; i < udf_vfsp->udf_nmaps; i++) {
876 if (map->udm_flags & UDM_MAP_VPM) {
877 error = EACCES;
878 goto out;
879 }
880 map++;
881 }
882
883 /*
884 * Check if the domain Id allows
885 * us to write
886 */
887 if (udf_vfsp->udf_lvd->lvd_dom_id.reg_ids[2] & 0x3) {
888 error = EACCES;
889 goto out;
890 }
891 udf_vfsp->udf_flags = UDF_FL_RW;
892
893 if (SWAP_32(lvid->lvid_int_type) == LOG_VOL_CLOSE_INT) {
894 udf_vfsp->udf_clean = UDF_CLEAN;
895 } else {
896 if (isroot) {
897 udf_vfsp->udf_clean = UDF_DIRTY;
898 } else {
899 error = ENOSPC;
900 goto out;
901 }
902 }
903 }
904
905 mutex_init(&udf_vfsp->udf_lock, NULL, MUTEX_DEFAULT, NULL);
906
907 mutex_init(&udf_vfsp->udf_rename_lck, NULL, MUTEX_DEFAULT, NULL);
908
909 _NOTE(COMPETING_THREADS_NOW);
910 if (error = ud_iget(vfsp, udf_vfsp->udf_ricb_prn,
911 udf_vfsp->udf_ricb_loc, &rip, NULL, cr)) {
912 mutex_destroy(&udf_vfsp->udf_lock);
913 goto out;
914 }
915
916
917 /*
918 * Get the root inode and
919 * initialize the root vnode
920 */
921 rvp = ITOV(rip);
922 mutex_enter(&rvp->v_lock);
923 rvp->v_flag |= VROOT;
924 mutex_exit(&rvp->v_lock);
925 udf_vfsp->udf_root = rvp;
926
927
928 if (why == ROOT_INIT && isroot)
929 rootvp = devvp;
930
931 ud_vfs_add(udf_vfsp);
932
933 if (udf_vfsp->udf_flags == UDF_FL_RW) {
934 udf_vfsp->udf_clean = UDF_DIRTY;
935 ud_update_superblock(vfsp);
936 }
937
938 return (0);
939
940 out:
941 ud_destroy_fsp(udf_vfsp);
942 if (needclose) {
943 (void) fop_close(devvp, (vfsp->vfs_flag & VFS_RDONLY) ?
944 FREAD : FREAD|FWRITE, 1, 0, cr, NULL);
945 bflush(dev);
946 binval(dev);
947 }
948 VN_RELE(devvp);
949
950 return (error);
951 }
952
953
954 static struct udf_vfs *
955 ud_validate_and_fill_superblock(dev_t dev, int32_t bsize, uint32_t avd_loc)
956 {
957 int32_t error, count, index, shift;
958 uint32_t dummy, vds_loc;
959 caddr_t addr;
960 daddr_t blkno, lblkno;
961 struct buf *secbp, *bp;
962 struct tag *ttag;
963 struct anch_vol_desc_ptr *avdp;
964 struct file_set_desc *fsd;
965 struct udf_vfs *udf_vfsp = NULL;
966 struct pmap_hdr *hdr;
967 struct pmap_typ1 *typ1;
968 struct pmap_typ2 *typ2;
969 struct ud_map *map;
970 int32_t desc_len;
971
972 ud_printf("ud_validate_and_fill_superblock\n");
973
974 if (bsize < DEV_BSIZE) {
975 return (NULL);
976 }
977 shift = 0;
978 while ((bsize >> shift) > DEV_BSIZE) {
979 shift++;
980 }
981
982 /*
983 * Read Anchor Volume Descriptor
984 * Verify it and get the location of
985 * Main Volume Descriptor Sequence
986 */
987 secbp = ud_bread(dev, avd_loc << shift, ANCHOR_VOL_DESC_LEN);
988 if ((error = geterror(secbp)) != 0) {
989 cmn_err(CE_NOTE, "udfs : Could not read Anchor Volume Desc %x",
990 error);
991 brelse(secbp);
992 return (NULL);
993 }
994 avdp = (struct anch_vol_desc_ptr *)secbp->b_un.b_addr;
995 if (ud_verify_tag_and_desc(&avdp->avd_tag, UD_ANCH_VOL_DESC,
996 avd_loc, 1, ANCHOR_VOL_DESC_LEN) != 0) {
997 brelse(secbp);
998 return (NULL);
999 }
1000 udf_vfsp = (struct udf_vfs *)
1001 kmem_zalloc(sizeof (struct udf_vfs), KM_SLEEP);
1002 udf_vfsp->udf_mvds_loc = SWAP_32(avdp->avd_main_vdse.ext_loc);
1003 udf_vfsp->udf_mvds_len = SWAP_32(avdp->avd_main_vdse.ext_len);
1004 udf_vfsp->udf_rvds_loc = SWAP_32(avdp->avd_res_vdse.ext_loc);
1005 udf_vfsp->udf_rvds_len = SWAP_32(avdp->avd_res_vdse.ext_len);
1006 secbp->b_flags = B_AGE | B_STALE;
1007 brelse(secbp);
1008
1009 /*
1010 * Read Main Volume Descriptor Sequence
1011 * and process it
1012 */
1013 vds_loc = udf_vfsp->udf_mvds_loc;
1014 secbp = ud_bread(dev, vds_loc << shift,
1015 udf_vfsp->udf_mvds_len);
1016 if ((error = geterror(secbp)) != 0) {
1017 brelse(secbp);
1018 cmn_err(CE_NOTE, "udfs : Could not read Main Volume Desc %x",
1019 error);
1020
1021 vds_loc = udf_vfsp->udf_rvds_loc;
1022 secbp = ud_bread(dev, vds_loc << shift,
1023 udf_vfsp->udf_rvds_len);
1024 if ((error = geterror(secbp)) != 0) {
1025 brelse(secbp);
1026 cmn_err(CE_NOTE,
1027 "udfs : Could not read Res Volume Desc %x", error);
1028 return (NULL);
1029 }
1030 }
1031
1032 udf_vfsp->udf_vds = ngeteblk(udf_vfsp->udf_mvds_len);
1033 bp = udf_vfsp->udf_vds;
1034 bp->b_edev = dev;
1035 bp->b_dev = cmpdev(dev);
1036 bp->b_blkno = vds_loc << shift;
1037 bp->b_bcount = udf_vfsp->udf_mvds_len;
1038 bcopy(secbp->b_un.b_addr, bp->b_un.b_addr, udf_vfsp->udf_mvds_len);
1039 secbp->b_flags |= B_STALE | B_AGE;
1040 brelse(secbp);
1041
1042
1043 count = udf_vfsp->udf_mvds_len / DEV_BSIZE;
1044 addr = bp->b_un.b_addr;
1045 for (index = 0; index < count; index ++) {
1046 ttag = (struct tag *)(addr + index * DEV_BSIZE);
1047 desc_len = udf_vfsp->udf_mvds_len - (index * DEV_BSIZE);
1048 if (ud_verify_tag_and_desc(ttag, UD_PRI_VOL_DESC,
1049 vds_loc + (index >> shift),
1050 1, desc_len) == 0) {
1051 if (udf_vfsp->udf_pvd == NULL) {
1052 udf_vfsp->udf_pvd =
1053 (struct pri_vol_desc *)ttag;
1054 } else {
1055 struct pri_vol_desc *opvd, *npvd;
1056
1057 opvd = udf_vfsp->udf_pvd;
1058 npvd = (struct pri_vol_desc *)ttag;
1059
1060 if ((strncmp(opvd->pvd_vsi,
1061 npvd->pvd_vsi, 128) == 0) &&
1062 (strncmp(opvd->pvd_vol_id,
1063 npvd->pvd_vol_id, 32) == 0) &&
1064 (strncmp((caddr_t)&opvd->pvd_desc_cs,
1065 (caddr_t)&npvd->pvd_desc_cs,
1066 sizeof (charspec_t)) == 0)) {
1067
1068 if (SWAP_32(opvd->pvd_vdsn) <
1069 SWAP_32(npvd->pvd_vdsn)) {
1070 udf_vfsp->udf_pvd = npvd;
1071 }
1072 } else {
1073 goto out;
1074 }
1075 }
1076 } else if (ud_verify_tag_and_desc(ttag, UD_LOG_VOL_DESC,
1077 vds_loc + (index >> shift),
1078 1, desc_len) == 0) {
1079 struct log_vol_desc *lvd;
1080
1081 lvd = (struct log_vol_desc *)ttag;
1082 if (strncmp(lvd->lvd_dom_id.reg_id,
1083 UDF_DOMAIN_NAME, 23) != 0) {
1084 printf("Domain ID in lvd is not valid\n");
1085 goto out;
1086 }
1087
1088 if (udf_vfsp->udf_lvd == NULL) {
1089 udf_vfsp->udf_lvd = lvd;
1090 } else {
1091 struct log_vol_desc *olvd;
1092
1093 olvd = udf_vfsp->udf_lvd;
1094 if ((strncmp((caddr_t)&olvd->lvd_desc_cs,
1095 (caddr_t)&lvd->lvd_desc_cs,
1096 sizeof (charspec_t)) == 0) &&
1097 (strncmp(olvd->lvd_lvid,
1098 lvd->lvd_lvid, 128) == 0)) {
1099 if (SWAP_32(olvd->lvd_vdsn) <
1100 SWAP_32(lvd->lvd_vdsn)) {
1101 udf_vfsp->udf_lvd = lvd;
1102 }
1103 } else {
1104 goto out;
1105 }
1106 }
1107 } else if (ud_verify_tag_and_desc(ttag, UD_PART_DESC,
1108 vds_loc + (index >> shift),
1109 1, desc_len) == 0) {
1110 int32_t i;
1111 struct phdr_desc *hdr;
1112 struct part_desc *pdesc;
1113 struct ud_part *pnew, *pold, *part;
1114
1115 pdesc = (struct part_desc *)ttag;
1116 pold = udf_vfsp->udf_parts;
1117 for (i = 0; i < udf_vfsp->udf_npart; i++) {
1118 if (pold->udp_number !=
1119 SWAP_16(pdesc->pd_pnum)) {
1120 pold++;
1121 continue;
1122 }
1123
1124 if (SWAP_32(pdesc->pd_vdsn) >
1125 pold->udp_seqno) {
1126 pold->udp_seqno =
1127 SWAP_32(pdesc->pd_vdsn);
1128 pold->udp_access =
1129 SWAP_32(pdesc->pd_acc_type);
1130 pold->udp_start =
1131 SWAP_32(pdesc->pd_part_start);
1132 pold->udp_length =
1133 SWAP_32(pdesc->pd_part_length);
1134 }
1135 goto loop_end;
1136 }
1137 pold = udf_vfsp->udf_parts;
1138 udf_vfsp->udf_npart++;
1139 pnew = kmem_zalloc(udf_vfsp->udf_npart *
1140 sizeof (struct ud_part), KM_SLEEP);
1141 udf_vfsp->udf_parts = pnew;
1142 if (pold) {
1143 bcopy(pold, pnew,
1144 sizeof (struct ud_part) *
1145 (udf_vfsp->udf_npart - 1));
1146 kmem_free(pold,
1147 sizeof (struct ud_part) *
1148 (udf_vfsp->udf_npart - 1));
1149 }
1150 part = pnew + (udf_vfsp->udf_npart - 1);
1151 part->udp_number = SWAP_16(pdesc->pd_pnum);
1152 part->udp_seqno = SWAP_32(pdesc->pd_vdsn);
1153 part->udp_access = SWAP_32(pdesc->pd_acc_type);
1154 part->udp_start = SWAP_32(pdesc->pd_part_start);
1155 part->udp_length = SWAP_32(pdesc->pd_part_length);
1156 part->udp_last_alloc = 0;
1157
1158 /*
1159 * Figure out space bitmaps
1160 * or space tables
1161 */
1162 hdr = (struct phdr_desc *)pdesc->pd_pc_use;
1163 if (hdr->phdr_ust.sad_ext_len) {
1164 part->udp_flags = UDP_SPACETBLS;
1165 part->udp_unall_loc =
1166 SWAP_32(hdr->phdr_ust.sad_ext_loc);
1167 part->udp_unall_len =
1168 SWAP_32(hdr->phdr_ust.sad_ext_len);
1169 part->udp_freed_loc =
1170 SWAP_32(hdr->phdr_fst.sad_ext_loc);
1171 part->udp_freed_len =
1172 SWAP_32(hdr->phdr_fst.sad_ext_len);
1173 } else {
1174 part->udp_flags = UDP_BITMAPS;
1175 part->udp_unall_loc =
1176 SWAP_32(hdr->phdr_usb.sad_ext_loc);
1177 part->udp_unall_len =
1178 SWAP_32(hdr->phdr_usb.sad_ext_len);
1179 part->udp_freed_loc =
1180 SWAP_32(hdr->phdr_fsb.sad_ext_loc);
1181 part->udp_freed_len =
1182 SWAP_32(hdr->phdr_fsb.sad_ext_len);
1183 }
1184 } else if (ud_verify_tag_and_desc(ttag, UD_TERM_DESC,
1185 vds_loc + (index >> shift),
1186 1, desc_len) == 0) {
1187
1188 break;
1189 }
1190 loop_end:
1191 ;
1192 }
1193 if ((udf_vfsp->udf_pvd == NULL) ||
1194 (udf_vfsp->udf_lvd == NULL) ||
1195 (udf_vfsp->udf_parts == NULL)) {
1196 goto out;
1197 }
1198
1199 /*
1200 * Process Primary Volume Descriptor
1201 */
1202 (void) strncpy(udf_vfsp->udf_volid, udf_vfsp->udf_pvd->pvd_vol_id, 32);
1203 udf_vfsp->udf_volid[31] = '\0';
1204 udf_vfsp->udf_tsno = SWAP_16(udf_vfsp->udf_pvd->pvd_tag.tag_sno);
1205
1206 /*
1207 * Process Logical Volume Descriptor
1208 */
1209 udf_vfsp->udf_lbsize =
1210 SWAP_32(udf_vfsp->udf_lvd->lvd_log_bsize);
1211 udf_vfsp->udf_lbmask = udf_vfsp->udf_lbsize - 1;
1212 udf_vfsp->udf_l2d_shift = shift;
1213 udf_vfsp->udf_l2b_shift = shift + DEV_BSHIFT;
1214
1215 /*
1216 * Check if the media is in
1217 * proper domain.
1218 */
1219 if (strcmp(udf_vfsp->udf_lvd->lvd_dom_id.reg_id,
1220 UDF_DOMAIN_NAME) != 0) {
1221 goto out;
1222 }
1223
1224 /*
1225 * AVDS offset does not match with the lbsize
1226 * in the lvd
1227 */
1228 if (udf_vfsp->udf_lbsize != bsize) {
1229 goto out;
1230 }
1231
1232 udf_vfsp->udf_iseq_loc =
1233 SWAP_32(udf_vfsp->udf_lvd->lvd_int_seq_ext.ext_loc);
1234 udf_vfsp->udf_iseq_len =
1235 SWAP_32(udf_vfsp->udf_lvd->lvd_int_seq_ext.ext_len);
1236
1237 udf_vfsp->udf_fsd_prn =
1238 SWAP_16(udf_vfsp->udf_lvd->lvd_lvcu.lad_ext_prn);
1239 udf_vfsp->udf_fsd_loc =
1240 SWAP_32(udf_vfsp->udf_lvd->lvd_lvcu.lad_ext_loc);
1241 udf_vfsp->udf_fsd_len =
1242 SWAP_32(udf_vfsp->udf_lvd->lvd_lvcu.lad_ext_len);
1243
1244
1245 /*
1246 * process paritions
1247 */
1248 udf_vfsp->udf_mtype = udf_vfsp->udf_parts[0].udp_access;
1249 for (index = 0; index < udf_vfsp->udf_npart; index ++) {
1250 if (udf_vfsp->udf_parts[index].udp_access <
1251 udf_vfsp->udf_mtype) {
1252 udf_vfsp->udf_mtype =
1253 udf_vfsp->udf_parts[index].udp_access;
1254 }
1255 }
1256 if ((udf_vfsp->udf_mtype < UDF_MT_RO) ||
1257 (udf_vfsp->udf_mtype > UDF_MT_OW)) {
1258 udf_vfsp->udf_mtype = UDF_MT_RO;
1259 }
1260
1261 udf_vfsp->udf_nmaps = 0;
1262 hdr = (struct pmap_hdr *)udf_vfsp->udf_lvd->lvd_pmaps;
1263 count = SWAP_32(udf_vfsp->udf_lvd->lvd_num_pmaps);
1264 for (index = 0; index < count; index++) {
1265
1266 if ((hdr->maph_type == MAP_TYPE1) &&
1267 (hdr->maph_length == MAP_TYPE1_LEN)) {
1268 typ1 = (struct pmap_typ1 *)hdr;
1269
1270 map = udf_vfsp->udf_maps;
1271 udf_vfsp->udf_maps =
1272 kmem_zalloc(sizeof (struct ud_map) *
1273 (udf_vfsp->udf_nmaps + 1), KM_SLEEP);
1274 if (map != NULL) {
1275 bcopy(map, udf_vfsp->udf_maps,
1276 sizeof (struct ud_map) *
1277 udf_vfsp->udf_nmaps);
1278 kmem_free(map, sizeof (struct ud_map) *
1279 udf_vfsp->udf_nmaps);
1280 }
1281 map = udf_vfsp->udf_maps + udf_vfsp->udf_nmaps;
1282 map->udm_flags = UDM_MAP_NORM;
1283 map->udm_vsn = SWAP_16(typ1->map1_vsn);
1284 map->udm_pn = SWAP_16(typ1->map1_pn);
1285 udf_vfsp->udf_nmaps ++;
1286 } else if ((hdr->maph_type == MAP_TYPE2) &&
1287 (hdr->maph_length == MAP_TYPE2_LEN)) {
1288 typ2 = (struct pmap_typ2 *)hdr;
1289
1290 if (strncmp(typ2->map2_pti.reg_id,
1291 UDF_VIRT_PART, 23) == 0) {
1292 /*
1293 * Add this to the normal
1294 * partition table so that
1295 * we donot
1296 */
1297 map = udf_vfsp->udf_maps;
1298 udf_vfsp->udf_maps =
1299 kmem_zalloc(sizeof (struct ud_map) *
1300 (udf_vfsp->udf_nmaps + 1), KM_SLEEP);
1301 if (map != NULL) {
1302 bcopy(map, udf_vfsp->udf_maps,
1303 sizeof (struct ud_map) *
1304 udf_vfsp->udf_nmaps);
1305 kmem_free(map,
1306 sizeof (struct ud_map) *
1307 udf_vfsp->udf_nmaps);
1308 }
1309 map = udf_vfsp->udf_maps + udf_vfsp->udf_nmaps;
1310 map->udm_flags = UDM_MAP_VPM;
1311 map->udm_vsn = SWAP_16(typ2->map2_vsn);
1312 map->udm_pn = SWAP_16(typ2->map2_pn);
1313 udf_vfsp->udf_nmaps ++;
1314 if (error = ud_get_last_block(dev, &lblkno)) {
1315 goto out;
1316 }
1317 if (error = ud_val_get_vat(udf_vfsp, dev,
1318 lblkno, map)) {
1319 goto out;
1320 }
1321 } else if (strncmp(typ2->map2_pti.reg_id,
1322 UDF_SPAR_PART, 23) == 0) {
1323
1324 if (SWAP_16(typ2->map2_pl) != 32) {
1325 printf(
1326 "Packet Length is not valid %x\n",
1327 SWAP_16(typ2->map2_pl));
1328 goto out;
1329 }
1330 if ((typ2->map2_nst < 1) ||
1331 (typ2->map2_nst > 4)) {
1332 goto out;
1333 }
1334 map = udf_vfsp->udf_maps;
1335 udf_vfsp->udf_maps =
1336 kmem_zalloc(sizeof (struct ud_map) *
1337 (udf_vfsp->udf_nmaps + 1),
1338 KM_SLEEP);
1339 if (map != NULL) {
1340 bcopy(map, udf_vfsp->udf_maps,
1341 sizeof (struct ud_map) *
1342 udf_vfsp->udf_nmaps);
1343 kmem_free(map,
1344 sizeof (struct ud_map) *
1345 udf_vfsp->udf_nmaps);
1346 }
1347 map = udf_vfsp->udf_maps + udf_vfsp->udf_nmaps;
1348 map->udm_flags = UDM_MAP_SPM;
1349 map->udm_vsn = SWAP_16(typ2->map2_vsn);
1350 map->udm_pn = SWAP_16(typ2->map2_pn);
1351
1352 udf_vfsp->udf_nmaps ++;
1353
1354 if (error = ud_read_sparing_tbls(udf_vfsp,
1355 dev, map, typ2)) {
1356 goto out;
1357 }
1358 } else {
1359 /*
1360 * Unknown type of partition
1361 * Bail out
1362 */
1363 goto out;
1364 }
1365 } else {
1366 /*
1367 * Unknown type of partition
1368 * Bail out
1369 */
1370 goto out;
1371 }
1372 hdr = (struct pmap_hdr *)(((uint8_t *)hdr) + hdr->maph_length);
1373 }
1374
1375
1376 /*
1377 * Read Logical Volume Integrity Sequence
1378 * and process it
1379 */
1380 secbp = ud_bread(dev, udf_vfsp->udf_iseq_loc << shift,
1381 udf_vfsp->udf_iseq_len);
1382 if ((error = geterror(secbp)) != 0) {
1383 cmn_err(CE_NOTE,
1384 "udfs : Could not read Logical Volume Integrity Sequence %x",
1385 error);
1386 brelse(secbp);
1387 goto out;
1388 }
1389 udf_vfsp->udf_iseq = ngeteblk(udf_vfsp->udf_iseq_len);
1390 bp = udf_vfsp->udf_iseq;
1391 bp->b_edev = dev;
1392 bp->b_dev = cmpdev(dev);
1393 bp->b_blkno = udf_vfsp->udf_iseq_loc << shift;
1394 bp->b_bcount = udf_vfsp->udf_iseq_len;
1395 bcopy(secbp->b_un.b_addr, bp->b_un.b_addr, udf_vfsp->udf_iseq_len);
1396 secbp->b_flags |= B_STALE | B_AGE;
1397 brelse(secbp);
1398
1399 count = udf_vfsp->udf_iseq_len / DEV_BSIZE;
1400 addr = bp->b_un.b_addr;
1401 for (index = 0; index < count; index ++) {
1402 ttag = (struct tag *)(addr + index * DEV_BSIZE);
1403 desc_len = udf_vfsp->udf_iseq_len - (index * DEV_BSIZE);
1404 if (ud_verify_tag_and_desc(ttag, UD_LOG_VOL_INT,
1405 udf_vfsp->udf_iseq_loc + (index >> shift),
1406 1, desc_len) == 0) {
1407
1408 struct log_vol_int_desc *lvid;
1409
1410 lvid = (struct log_vol_int_desc *)ttag;
1411 udf_vfsp->udf_lvid = lvid;
1412
1413 if (SWAP_32(lvid->lvid_int_type) == LOG_VOL_CLOSE_INT) {
1414 udf_vfsp->udf_clean = UDF_CLEAN;
1415 } else {
1416 udf_vfsp->udf_clean = UDF_DIRTY;
1417 }
1418
1419 /*
1420 * update superblock with the metadata
1421 */
1422 ud_convert_to_superblock(udf_vfsp, lvid);
1423 break;
1424 }
1425 }
1426
1427 if (udf_vfsp->udf_lvid == NULL) {
1428 goto out;
1429 }
1430
1431 if ((blkno = ud_xlate_to_daddr(udf_vfsp,
1432 udf_vfsp->udf_fsd_prn, udf_vfsp->udf_fsd_loc,
1433 1, &dummy)) == 0) {
1434 goto out;
1435 }
1436 secbp = ud_bread(dev, blkno << shift, udf_vfsp->udf_fsd_len);
1437 if ((error = geterror(secbp)) != 0) {
1438 cmn_err(CE_NOTE,
1439 "udfs : Could not read File Set Descriptor %x", error);
1440 brelse(secbp);
1441 goto out;
1442 }
1443 fsd = (struct file_set_desc *)secbp->b_un.b_addr;
1444 if (ud_verify_tag_and_desc(&fsd->fsd_tag, UD_FILE_SET_DESC,
1445 udf_vfsp->udf_fsd_loc,
1446 1, udf_vfsp->udf_fsd_len) != 0) {
1447 secbp->b_flags = B_AGE | B_STALE;
1448 brelse(secbp);
1449 goto out;
1450 }
1451 udf_vfsp->udf_ricb_prn = SWAP_16(fsd->fsd_root_icb.lad_ext_prn);
1452 udf_vfsp->udf_ricb_loc = SWAP_32(fsd->fsd_root_icb.lad_ext_loc);
1453 udf_vfsp->udf_ricb_len = SWAP_32(fsd->fsd_root_icb.lad_ext_len);
1454 secbp->b_flags = B_AGE | B_STALE;
1455 brelse(secbp);
1456 udf_vfsp->udf_root_blkno = ud_xlate_to_daddr(udf_vfsp,
1457 udf_vfsp->udf_ricb_prn, udf_vfsp->udf_ricb_loc,
1458 1, &dummy);
1459
1460 return (udf_vfsp);
1461 out:
1462 ud_destroy_fsp(udf_vfsp);
1463
1464 return (NULL);
1465 }
1466
1467 /*
1468 * release/free resources from one ud_map; map data was zalloc'd in
1469 * ud_validate_and_fill_superblock() and fields may later point to
1470 * valid data
1471 */
1472 static void
1473 ud_free_map(struct ud_map *map)
1474 {
1475 uint32_t n;
1476
1477 if (map->udm_flags & UDM_MAP_VPM) {
1478 if (map->udm_count) {
1479 kmem_free(map->udm_count,
1480 map->udm_nent * sizeof (*map->udm_count));
1481 map->udm_count = NULL;
1482 }
1483 if (map->udm_bp) {
1484 for (n = 0; n < map->udm_nent; n++) {
1485 if (map->udm_bp[n])
1486 brelse(map->udm_bp[n]);
1487 }
1488 kmem_free(map->udm_bp,
1489 map->udm_nent * sizeof (*map->udm_bp));
1490 map->udm_bp = NULL;
1491 }
1492 if (map->udm_addr) {
1493 kmem_free(map->udm_addr,
1494 map->udm_nent * sizeof (*map->udm_addr));
1495 map->udm_addr = NULL;
1496 }
1497 }
1498 if (map->udm_flags & UDM_MAP_SPM) {
1499 for (n = 0; n < MAX_SPM; n++) {
1500 if (map->udm_sbp[n]) {
1501 brelse(map->udm_sbp[n]);
1502 map->udm_sbp[n] = NULL;
1503 map->udm_spaddr[n] = NULL;
1504 }
1505 }
1506 }
1507 }
1508
1509 void
1510 ud_destroy_fsp(struct udf_vfs *udf_vfsp)
1511 {
1512 int32_t i;
1513
1514 ud_printf("ud_destroy_fsp\n");
1515 if (udf_vfsp == NULL)
1516 return;
1517
1518 if (udf_vfsp->udf_maps) {
1519 for (i = 0; i < udf_vfsp->udf_nmaps; i++)
1520 ud_free_map(&udf_vfsp->udf_maps[i]);
1521
1522 kmem_free(udf_vfsp->udf_maps,
1523 udf_vfsp->udf_nmaps * sizeof (*udf_vfsp->udf_maps));
1524 }
1525
1526 if (udf_vfsp->udf_parts) {
1527 kmem_free(udf_vfsp->udf_parts,
1528 udf_vfsp->udf_npart * sizeof (*udf_vfsp->udf_parts));
1529 }
1530 if (udf_vfsp->udf_iseq) {
1531 udf_vfsp->udf_iseq->b_flags |= (B_STALE|B_AGE);
1532 brelse(udf_vfsp->udf_iseq);
1533 }
1534 if (udf_vfsp->udf_vds) {
1535 udf_vfsp->udf_vds->b_flags |= (B_STALE|B_AGE);
1536 brelse(udf_vfsp->udf_vds);
1537 }
1538 if (udf_vfsp->udf_vfs)
1539 ud_vfs_remove(udf_vfsp);
1540 if (udf_vfsp->udf_fsmnt) {
1541 kmem_free(udf_vfsp->udf_fsmnt,
1542 strlen(udf_vfsp->udf_fsmnt) + 1);
1543 }
1544 kmem_free(udf_vfsp, sizeof (*udf_vfsp));
1545 }
1546
1547 void
1548 ud_convert_to_superblock(struct udf_vfs *udf_vfsp,
1549 struct log_vol_int_desc *lvid)
1550 {
1551 int32_t i, c;
1552 uint32_t *temp;
1553 struct ud_part *ud_part;
1554 struct lvid_iu *iu;
1555
1556 udf_vfsp->udf_maxuniq = SWAP_64(lvid->lvid_uniqid);
1557 temp = lvid->lvid_fst;
1558 c = SWAP_32(lvid->lvid_npart);
1559 ud_part = udf_vfsp->udf_parts;
1560 for (i = 0; i < c; i++) {
1561 if (i >= udf_vfsp->udf_npart) {
1562 continue;
1563 }
1564 ud_part->udp_nfree = SWAP_32(temp[i]);
1565 ud_part->udp_nblocks = SWAP_32(temp[c + i]);
1566 udf_vfsp->udf_freeblks += SWAP_32(temp[i]);
1567 udf_vfsp->udf_totalblks += SWAP_32(temp[c + i]);
1568 ud_part++;
1569 }
1570
1571 iu = (struct lvid_iu *)(temp + c * 2);
1572 udf_vfsp->udf_nfiles = SWAP_32(iu->lvidiu_nfiles);
1573 udf_vfsp->udf_ndirs = SWAP_32(iu->lvidiu_ndirs);
1574 udf_vfsp->udf_miread = BCD2HEX_16(SWAP_16(iu->lvidiu_mread));
1575 udf_vfsp->udf_miwrite = BCD2HEX_16(SWAP_16(iu->lvidiu_mwrite));
1576 udf_vfsp->udf_mawrite = BCD2HEX_16(SWAP_16(iu->lvidiu_maxwr));
1577 }
1578
1579 void
1580 ud_update_superblock(struct vfs *vfsp)
1581 {
1582 struct udf_vfs *udf_vfsp;
1583
1584 ud_printf("ud_update_superblock\n");
1585
1586 udf_vfsp = (struct udf_vfs *)vfsp->vfs_data;
1587
1588 mutex_enter(&udf_vfsp->udf_lock);
1589 ud_sbwrite(udf_vfsp);
1590 mutex_exit(&udf_vfsp->udf_lock);
1591 }
1592
1593
1594 #include <sys/dkio.h>
1595 #include <sys/cdio.h>
1596 #include <sys/vtoc.h>
1597
1598 /*
1599 * This part of the code is known
1600 * to work with only sparc. It needs
1601 * to be evluated before using it with x86
1602 */
1603 int32_t
1604 ud_get_last_block(dev_t dev, daddr_t *blkno)
1605 {
1606 struct vtoc vtoc;
1607 struct dk_cinfo dki_info;
1608 int32_t rval, error;
1609
1610 if ((error = cdev_ioctl(dev, DKIOCGVTOC, (intptr_t)&vtoc,
1611 FKIOCTL|FREAD|FNATIVE, CRED(), &rval)) != 0) {
1612 cmn_err(CE_NOTE, "Could not get the vtoc information");
1613 return (error);
1614 }
1615
1616 if (vtoc.v_sanity != VTOC_SANE) {
1617 return (EINVAL);
1618 }
1619 if ((error = cdev_ioctl(dev, DKIOCINFO, (intptr_t)&dki_info,
1620 FKIOCTL|FREAD|FNATIVE, CRED(), &rval)) != 0) {
1621 cmn_err(CE_NOTE, "Could not get the slice information");
1622 return (error);
1623 }
1624
1625 if (dki_info.dki_partition > V_NUMPAR) {
1626 return (EINVAL);
1627 }
1628
1629
1630 *blkno = vtoc.v_part[dki_info.dki_partition].p_size;
1631
1632 return (0);
1633 }
1634
1635 /* Search sequentially N - 2, N, N - 152, N - 150 for vat icb */
1636 /*
1637 * int32_t ud_sub_blks[] = {2, 0, 152, 150};
1638 */
1639 int32_t ud_sub_blks[] = {152, 150, 2, 0};
1640 int32_t ud_sub_count = 4;
1641
1642 /*
1643 * Validate the VAT ICB
1644 */
1645 static int32_t
1646 ud_val_get_vat(struct udf_vfs *udf_vfsp, dev_t dev,
1647 daddr_t blkno, struct ud_map *udm)
1648 {
1649 struct buf *secbp;
1650 struct file_entry *fe;
1651 int32_t end_loc, i, j, ad_type;
1652 struct short_ad *sad;
1653 struct long_ad *lad;
1654 uint32_t count, blk;
1655 struct ud_part *ud_part;
1656 int err = 0;
1657
1658 end_loc = (blkno >> udf_vfsp->udf_l2d_shift) - 1;
1659
1660 for (i = 0; i < ud_sub_count; i++) {
1661 udm->udm_vat_icb = end_loc - ud_sub_blks[i];
1662
1663 secbp = ud_bread(dev,
1664 udm->udm_vat_icb << udf_vfsp->udf_l2d_shift,
1665 udf_vfsp->udf_lbsize);
1666 ASSERT(secbp->b_un.b_addr);
1667
1668 fe = (struct file_entry *)secbp->b_un.b_addr;
1669 if (ud_verify_tag_and_desc(&fe->fe_tag, UD_FILE_ENTRY, 0,
1670 0, 0) == 0) {
1671 if (ud_verify_tag_and_desc(&fe->fe_tag, UD_FILE_ENTRY,
1672 SWAP_32(fe->fe_tag.tag_loc),
1673 1, udf_vfsp->udf_lbsize) == 0) {
1674 if (fe->fe_icb_tag.itag_ftype == 0) {
1675 break;
1676 }
1677 }
1678 }
1679 secbp->b_flags |= B_AGE | B_STALE;
1680 brelse(secbp);
1681 }
1682 if (i == ud_sub_count) {
1683 return (EINVAL);
1684 }
1685
1686 ad_type = SWAP_16(fe->fe_icb_tag.itag_flags) & 0x3;
1687 if (ad_type == ICB_FLAG_ONE_AD) {
1688 udm->udm_nent = 1;
1689 } else if (ad_type == ICB_FLAG_SHORT_AD) {
1690 udm->udm_nent =
1691 SWAP_32(fe->fe_len_adesc) / sizeof (struct short_ad);
1692 } else if (ad_type == ICB_FLAG_LONG_AD) {
1693 udm->udm_nent =
1694 SWAP_32(fe->fe_len_adesc) / sizeof (struct long_ad);
1695 } else {
1696 err = EINVAL;
1697 goto end;
1698 }
1699
1700 udm->udm_count = kmem_zalloc(udm->udm_nent * sizeof (*udm->udm_count),
1701 KM_SLEEP);
1702 udm->udm_bp = kmem_zalloc(udm->udm_nent * sizeof (*udm->udm_bp),
1703 KM_SLEEP);
1704 udm->udm_addr = kmem_zalloc(udm->udm_nent * sizeof (*udm->udm_addr),
1705 KM_SLEEP);
1706
1707 if (ad_type == ICB_FLAG_ONE_AD) {
1708 udm->udm_count[0] = (SWAP_64(fe->fe_info_len) - 36) /
1709 sizeof (uint32_t);
1710 udm->udm_bp[0] = secbp;
1711 udm->udm_addr[0] = (uint32_t *)
1712 &fe->fe_spec[SWAP_32(fe->fe_len_ear)];
1713 return (0);
1714 }
1715 for (i = 0; i < udm->udm_nent; i++) {
1716 if (ad_type == ICB_FLAG_SHORT_AD) {
1717 sad = (struct short_ad *)
1718 (fe->fe_spec + SWAP_32(fe->fe_len_ear));
1719 sad += i;
1720 count = SWAP_32(sad->sad_ext_len);
1721 blk = SWAP_32(sad->sad_ext_loc);
1722 } else {
1723 lad = (struct long_ad *)
1724 (fe->fe_spec + SWAP_32(fe->fe_len_ear));
1725 lad += i;
1726 count = SWAP_32(lad->lad_ext_len);
1727 blk = SWAP_32(lad->lad_ext_loc);
1728 ASSERT(SWAP_16(lad->lad_ext_prn) == udm->udm_pn);
1729 }
1730 if ((count & 0x3FFFFFFF) == 0) {
1731 break;
1732 }
1733 if (i < udm->udm_nent - 1) {
1734 udm->udm_count[i] = count / 4;
1735 } else {
1736 udm->udm_count[i] = (count - 36) / 4;
1737 }
1738 ud_part = udf_vfsp->udf_parts;
1739 for (j = 0; j < udf_vfsp->udf_npart; j++) {
1740 if (udm->udm_pn == ud_part->udp_number) {
1741 blk = ud_part->udp_start + blk;
1742 break;
1743 }
1744 }
1745 if (j == udf_vfsp->udf_npart) {
1746 err = EINVAL;
1747 break;
1748 }
1749
1750 count = (count + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
1751 udm->udm_bp[i] = ud_bread(dev,
1752 blk << udf_vfsp->udf_l2d_shift, count);
1753 if ((udm->udm_bp[i]->b_error != 0) ||
1754 (udm->udm_bp[i]->b_resid)) {
1755 err = EINVAL;
1756 break;
1757 }
1758 udm->udm_addr[i] = (uint32_t *)udm->udm_bp[i]->b_un.b_addr;
1759 }
1760
1761 end:
1762 if (err)
1763 ud_free_map(udm);
1764 secbp->b_flags |= B_AGE | B_STALE;
1765 brelse(secbp);
1766 return (err);
1767 }
1768
1769 int32_t
1770 ud_read_sparing_tbls(struct udf_vfs *udf_vfsp,
1771 dev_t dev, struct ud_map *map, struct pmap_typ2 *typ2)
1772 {
1773 int32_t index, valid = 0;
1774 uint32_t sz;
1775 struct buf *bp;
1776 struct stbl *stbl;
1777
1778 map->udm_plen = SWAP_16(typ2->map2_pl);
1779 map->udm_nspm = typ2->map2_nst;
1780 map->udm_spsz = SWAP_32(typ2->map2_sest);
1781 sz = (map->udm_spsz + udf_vfsp->udf_lbmask) & ~udf_vfsp->udf_lbmask;
1782 if (sz == 0) {
1783 return (0);
1784 }
1785
1786 for (index = 0; index < map->udm_nspm; index++) {
1787 map->udm_loc[index] = SWAP_32(typ2->map2_st[index]);
1788
1789 bp = ud_bread(dev,
1790 map->udm_loc[index] << udf_vfsp->udf_l2d_shift, sz);
1791 if ((bp->b_error != 0) || (bp->b_resid)) {
1792 brelse(bp);
1793 continue;
1794 }
1795 stbl = (struct stbl *)bp->b_un.b_addr;
1796 if (strncmp(stbl->stbl_si.reg_id, UDF_SPAR_TBL, 23) != 0) {
1797 printf("Sparing Identifier does not match\n");
1798 bp->b_flags |= B_AGE | B_STALE;
1799 brelse(bp);
1800 continue;
1801 }
1802 map->udm_sbp[index] = bp;
1803 map->udm_spaddr[index] = bp->b_un.b_addr;
1804 #ifdef UNDEF
1805 {
1806 struct stbl_entry *te;
1807 int32_t i, tbl_len;
1808
1809 te = (struct stbl_entry *)&stbl->stbl_entry;
1810 tbl_len = SWAP_16(stbl->stbl_len);
1811
1812 printf("%x %x\n", tbl_len, SWAP_32(stbl->stbl_seqno));
1813 printf("%x %x\n", bp->b_un.b_addr, te);
1814
1815 for (i = 0; i < tbl_len; i++) {
1816 printf("%x %x\n", SWAP_32(te->sent_ol), SWAP_32(te->sent_ml));
1817 te ++;
1818 }
1819 }
1820 #endif
1821 valid ++;
1822 }
1823
1824 if (valid) {
1825 return (0);
1826 }
1827 return (EINVAL);
1828 }
1829
1830 uint32_t
1831 ud_get_lbsize(dev_t dev, uint32_t *loc)
1832 {
1833 int32_t bsize, shift, index, end_index;
1834 daddr_t last_block;
1835 uint32_t avd_loc;
1836 struct buf *bp;
1837 struct anch_vol_desc_ptr *avdp;
1838 uint32_t session_offset = 0;
1839 int32_t rval;
1840
1841 if (ud_get_last_block(dev, &last_block) != 0) {
1842 end_index = 1;
1843 } else {
1844 end_index = 3;
1845 }
1846
1847 if (cdev_ioctl(dev, CDROMREADOFFSET, (intptr_t)&session_offset,
1848 FKIOCTL|FREAD|FNATIVE, CRED(), &rval) != 0) {
1849 session_offset = 0;
1850 }
1851
1852 for (index = 0; index < end_index; index++) {
1853
1854 for (bsize = DEV_BSIZE, shift = 0;
1855 bsize <= MAXBSIZE; bsize <<= 1, shift++) {
1856
1857 if (index == 0) {
1858 avd_loc = 256;
1859 if (bsize <= 2048) {
1860 avd_loc +=
1861 session_offset * 2048 / bsize;
1862 } else {
1863 avd_loc +=
1864 session_offset / (bsize / 2048);
1865 }
1866 } else if (index == 1) {
1867 avd_loc = last_block - (1 << shift);
1868 } else {
1869 avd_loc = last_block - (256 << shift);
1870 }
1871
1872 bp = ud_bread(dev, avd_loc << shift,
1873 ANCHOR_VOL_DESC_LEN);
1874 if (geterror(bp) != 0) {
1875 brelse(bp);
1876 continue;
1877 }
1878
1879 /*
1880 * Verify if we have avdp here
1881 */
1882 avdp = (struct anch_vol_desc_ptr *)bp->b_un.b_addr;
1883 if (ud_verify_tag_and_desc(&avdp->avd_tag,
1884 UD_ANCH_VOL_DESC, avd_loc,
1885 1, ANCHOR_VOL_DESC_LEN) != 0) {
1886 bp->b_flags |= B_AGE | B_STALE;
1887 brelse(bp);
1888 continue;
1889 }
1890 bp->b_flags |= B_AGE | B_STALE;
1891 brelse(bp);
1892 *loc = avd_loc;
1893 return (bsize);
1894 }
1895 }
1896
1897 /*
1898 * Did not find AVD at all the locations
1899 */
1900 return (0);
1901 }
1902
1903 static const struct vfsops udf_vfsops = {
1904 .vfs_mount = udf_mount,
1905 .vfs_unmount = udf_unmount,
1906 .vfs_root = udf_root,
1907 .vfs_statvfs = udf_statvfs,
1908 .vfs_sync = udf_sync,
1909 .vfs_vget = udf_vget,
1910 .vfs_mountroot = udf_mountroot,
1911 };
1912
1913 static int
1914 udfinit(int fstype, char *name)
1915 {
1916 int error;
1917
1918 ud_printf("udfinit\n");
1919
1920 error = vfs_setfsops(fstype, &udf_vfsops);
1921 if (error != 0) {
1922 cmn_err(CE_WARN, "udfinit: bad fstype");
1923 return (error);
1924 }
1925
1926 udf_fstype = fstype;
1927
1928 ud_init_inodes();
1929
1930 return (0);
1931 }
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