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 |
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 |
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 |
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 |
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 |
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 |
544 | cd9660_start(struct mount *mp, int flags) |
545 | { |
546 | return 0; |
547 | } |
548 | |
549 | /* |
550 | * unmount system call |
551 | */ |
552 | int |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 | |