Add an argument to vfs_add_vnodeops() to specify VVF_* flags for the vop_ops
[dragonfly.git] / sys / vfs / isofs / cd9660 / cd9660_vfsops.c
CommitLineData
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1/*-
2 * Copyright (c) 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $
dc1be39c 40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.28 2005/09/17 07:43:08 dillon Exp $
984263bc
MD
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
984263bc 45#include <sys/proc.h>
fad57d0e 46#include <sys/nlookup.h>
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47#include <sys/kernel.h>
48#include <sys/vnode.h>
49#include <sys/mount.h>
50#include <sys/buf.h>
51#include <sys/cdio.h>
52#include <sys/conf.h>
53#include <sys/fcntl.h>
54#include <sys/malloc.h>
55#include <sys/stat.h>
56#include <sys/syslog.h>
57
58#include <vm/vm_zone.h>
59
1f2de5d4
MD
60#include "iso.h"
61#include "iso_rrip.h"
62#include "cd9660_node.h"
63#include "cd9660_mount.h"
984263bc 64
0961aa92
MD
65extern struct vnodeopv_entry_desc cd9660_vnodeop_entries[];
66extern struct vnodeopv_entry_desc cd9660_specop_entries[];
67extern struct vnodeopv_entry_desc cd9660_fifoop_entries[];
68
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69MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
70MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
71
21739618 72static int cd9660_mount (struct mount *, char *, caddr_t, struct thread *);
a6ee311a
RG
73static int cd9660_unmount (struct mount *, int, struct thread *);
74static int cd9660_root (struct mount *, struct vnode **);
75static int cd9660_statfs (struct mount *, struct statfs *, struct thread *);
76static int cd9660_vget (struct mount *, ino_t, struct vnode **);
77static int cd9660_fhtovp (struct mount *, struct fid *, struct vnode **);
78static int cd9660_checkexp (struct mount *, struct sockaddr *,
79 int *, struct ucred **);
80static int cd9660_vptofh (struct vnode *, struct fid *);
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81
82static struct vfsops cd9660_vfsops = {
43c45e8f
HP
83 .vfs_mount = cd9660_mount,
84 .vfs_unmount = cd9660_unmount,
85 .vfs_root = cd9660_root,
86 .vfs_statfs = cd9660_statfs,
87 .vfs_sync = vfs_stdsync,
88 .vfs_vget = cd9660_vget,
89 .vfs_fhtovp = cd9660_fhtovp,
90 .vfs_checkexp = cd9660_checkexp,
91 .vfs_vptofh = cd9660_vptofh,
92 .vfs_init = cd9660_init,
93 .vfs_uninit = cd9660_uninit,
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94};
95VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
96MODULE_VERSION(cd9660, 1);
97
98
99/*
100 * Called by vfs_mountroot when iso is going to be mounted as root.
101 */
102
a6ee311a
RG
103static int iso_get_ssector (dev_t dev, struct thread *td);
104static int iso_mountfs (struct vnode *devvp, struct mount *mp,
105 struct thread *td, struct iso_args *argp);
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106
107/*
108 * Try to find the start of the last data track on this CD-ROM. This
109 * is used to mount the last session of a multi-session CD. Bail out
110 * and return 0 if we fail, this is always a safe bet.
111 */
112static int
dadab5e9 113iso_get_ssector(dev_t dev, struct thread *td)
984263bc
MD
114{
115 struct ioc_toc_header h;
116 struct ioc_read_toc_single_entry t;
117 int i;
984263bc 118
335dda38 119 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
984263bc
MD
120 return 0;
121
122 for (i = h.ending_track; i >= 0; i--) {
123 t.address_format = CD_LBA_FORMAT;
124 t.track = i;
335dda38 125 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) {
984263bc 126 return 0;
335dda38 127 }
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128 if ((t.entry.control & 4) != 0)
129 /* found a data track */
130 break;
131 }
132
133 if (i < 0)
134 return 0;
135
136 return ntohl(t.entry.addr.lba);
137}
138
a6ee311a 139static int iso_mountroot (struct mount *mp, struct thread *td);
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140
141static int
dadab5e9 142iso_mountroot(struct mount *mp, struct thread *td)
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143{
144 struct iso_args args;
21739618 145 struct vnode *rootvp;
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146 int error;
147
148 if ((error = bdevvp(rootdev, &rootvp))) {
149 printf("iso_mountroot: can't find rootvp\n");
150 return (error);
151 }
152 args.flags = ISOFSMNT_ROOT;
153
5fd012e0 154 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
fad57d0e 155 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL, td);
5fd012e0 156 VOP_UNLOCK(rootvp, 0, td);
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MD
157 if (error)
158 return (error);
159
dadab5e9 160 args.ssector = iso_get_ssector(rootdev, td);
984263bc 161
3b568787 162 (void)VOP_CLOSE(rootvp, FREAD, td);
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163
164 if (bootverbose)
165 printf("iso_mountroot(): using session at block %d\n",
166 args.ssector);
dadab5e9 167 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
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168 return (error);
169
dadab5e9 170 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
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171 return (0);
172}
173
174/*
175 * VFS Operations.
176 *
177 * mount system call
178 */
179static int
21739618 180cd9660_mount(struct mount *mp, char *path, caddr_t data, struct thread *td)
984263bc
MD
181{
182 struct vnode *devvp;
183 struct iso_args args;
184 size_t size;
185 int error;
186 mode_t accessmode;
187 struct iso_mnt *imp = 0;
fad57d0e 188 struct nlookupdata nd;
984263bc 189
83760fab 190 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) {
dadab5e9 191 return (iso_mountroot(mp, td));
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MD
192 }
193 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
194 return (error);
195
196 if ((mp->mnt_flag & MNT_RDONLY) == 0)
197 return (EROFS);
198
dadab5e9
MD
199 KKASSERT(td->td_proc);
200
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201 /*
202 * If updating, check whether changing from read-only to
203 * read/write; if there is no device name, that's all we do.
204 */
205 if (mp->mnt_flag & MNT_UPDATE) {
206 imp = VFSTOISOFS(mp);
207 if (args.fspec == 0)
208 return (vfs_export(mp, &imp->im_export, &args.export));
209 }
210 /*
211 * Not an update, or updating the name: look up the name
212 * and verify that it refers to a sensible block device.
213 */
fad57d0e
MD
214 devvp = NULL;
215 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
216 if (error == 0)
217 error = nlookup(&nd);
218 if (error == 0)
219 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp);
220 nlookup_done(&nd);
221 if (error)
984263bc 222 return (error);
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223
224 if (!vn_isdisk(devvp, &error)) {
225 vrele(devvp);
226 return (error);
227 }
228
229 /*
230 * Verify that user has necessary permissions on the device,
231 * or has superuser abilities
232 */
233 accessmode = VREAD;
5fd012e0 234 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
dadab5e9 235 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td);
984263bc 236 if (error)
dadab5e9 237 error = suser(td);
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MD
238 if (error) {
239 vput(devvp);
240 return (error);
241 }
5fd012e0 242 VOP_UNLOCK(devvp, 0, td);
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243
244 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
dadab5e9 245 error = iso_mountfs(devvp, mp, td, &args);
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MD
246 } else {
247 if (devvp != imp->im_devvp)
248 error = EINVAL; /* needs translation */
249 else
250 vrele(devvp);
251 }
252 if (error) {
253 vrele(devvp);
254 return error;
255 }
256 imp = VFSTOISOFS(mp);
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257 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
258 &size);
259 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
dadab5e9 260 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
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261 return 0;
262}
263
264/*
265 * Common code for mount and mountroot
266 */
267static int
3fa8192b
CP
268iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
269 struct iso_args *argp)
270{
460af697 271 struct iso_mnt *isomp = NULL;
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272 struct buf *bp = NULL;
273 struct buf *pribp = NULL, *supbp = NULL;
e4c9c0c8 274 dev_t dev;
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275 int error = EINVAL;
276 int needclose = 0;
277 int high_sierra = 0;
278 int iso_bsize;
279 int iso_blknum;
280 int joliet_level;
281 struct iso_volume_descriptor *vdp = 0;
282 struct iso_primary_descriptor *pri = NULL;
283 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
284 struct iso_supplementary_descriptor *sup = NULL;
285 struct iso_directory_record *rootp;
286 int logical_block_size;
287
288 if (!(mp->mnt_flag & MNT_RDONLY))
289 return EROFS;
290
291 /*
292 * Disallow multiple mounts of the same device.
293 * Disallow mounting of a device that is currently in use
984263bc
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294 * Flush out any old buffers remaining from a previous use.
295 */
296 if ((error = vfs_mountedon(devvp)))
297 return error;
21739618 298 if (count_udev(devvp->v_udev) > 0)
984263bc 299 return EBUSY;
3b568787 300 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
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301 return (error);
302
5fd012e0 303 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
fad57d0e 304 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td);
5fd012e0 305 VOP_UNLOCK(devvp, 0, td);
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MD
306 if (error)
307 return error;
e4c9c0c8
MD
308 dev = devvp->v_rdev;
309 if (dev->si_iosize_max != 0)
310 mp->mnt_iosize_max = dev->si_iosize_max;
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MD
311 if (mp->mnt_iosize_max > MAXPHYS)
312 mp->mnt_iosize_max = MAXPHYS;
313
314 needclose = 1;
315
316 /* This is the "logical sector size". The standard says this
317 * should be 2048 or the physical sector size on the device,
318 * whichever is greater. For now, we'll just use a constant.
319 */
320 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
321
322 joliet_level = 0;
323 for (iso_blknum = 16 + argp->ssector;
324 iso_blknum < 100 + argp->ssector;
325 iso_blknum++) {
326 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
3b568787 327 iso_bsize, &bp)) != 0)
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328 goto out;
329
330 vdp = (struct iso_volume_descriptor *)bp->b_data;
331 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
332 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
333 sizeof vdp->id) != 0) {
334 error = EINVAL;
335 goto out;
336 } else
337 high_sierra = 1;
338 }
339 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
340 case ISO_VD_PRIMARY:
341 if (pribp == NULL) {
342 pribp = bp;
343 bp = NULL;
344 pri = (struct iso_primary_descriptor *)vdp;
345 pri_sierra =
346 (struct iso_sierra_primary_descriptor *)vdp;
347 }
348 break;
349
350 case ISO_VD_SUPPLEMENTARY:
351 if (supbp == NULL) {
352 supbp = bp;
353 bp = NULL;
354 sup = (struct iso_supplementary_descriptor *)vdp;
355
356 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
357 if (bcmp(sup->escape, "%/@", 3) == 0)
358 joliet_level = 1;
359 if (bcmp(sup->escape, "%/C", 3) == 0)
360 joliet_level = 2;
361 if (bcmp(sup->escape, "%/E", 3) == 0)
362 joliet_level = 3;
363
364 if ((isonum_711 (sup->flags) & 1) &&
365 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
366 joliet_level = 0;
367 }
368 }
369 break;
370
371 case ISO_VD_END:
372 goto vd_end;
373
374 default:
375 break;
376 }
377 if (bp) {
378 brelse(bp);
379 bp = NULL;
380 }
381 }
382 vd_end:
383 if (bp) {
384 brelse(bp);
385 bp = NULL;
386 }
387
388 if (pri == NULL) {
389 error = EINVAL;
390 goto out;
391 }
392
393 logical_block_size =
394 isonum_723 (high_sierra?
395 pri_sierra->logical_block_size:
396 pri->logical_block_size);
397
398 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
399 || (logical_block_size & (logical_block_size - 1)) != 0) {
400 error = EINVAL;
401 goto out;
402 }
403
404 rootp = (struct iso_directory_record *)
405 (high_sierra?
406 pri_sierra->root_directory_record:
407 pri->root_directory_record);
408
460af697 409 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
984263bc
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410 isomp->logical_block_size = logical_block_size;
411 isomp->volume_space_size =
412 isonum_733 (high_sierra?
413 pri_sierra->volume_space_size:
414 pri->volume_space_size);
415 isomp->joliet_level = 0;
416 /*
417 * Since an ISO9660 multi-session CD can also access previous
418 * sessions, we have to include them into the space consider-
419 * ations. This doesn't yield a very accurate number since
420 * parts of the old sessions might be inaccessible now, but we
421 * can't do much better. This is also important for the NFS
422 * filehandle validation.
423 */
424 isomp->volume_space_size += argp->ssector;
425 bcopy (rootp, isomp->root, sizeof isomp->root);
426 isomp->root_extent = isonum_733 (rootp->extent);
427 isomp->root_size = isonum_733 (rootp->size);
428
429 isomp->im_bmask = logical_block_size - 1;
430 isomp->im_bshift = ffs(logical_block_size) - 1;
431
432 pribp->b_flags |= B_AGE;
433 brelse(pribp);
434 pribp = NULL;
435
436 mp->mnt_data = (qaddr_t)isomp;
437 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
438 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
439 mp->mnt_maxsymlinklen = 0;
440 mp->mnt_flag |= MNT_LOCAL;
441 isomp->im_mountp = mp;
442 isomp->im_dev = dev;
443 isomp->im_devvp = devvp;
444
e4c9c0c8 445 dev->si_mountpoint = mp;
984263bc
MD
446
447 /* Check the Rock Ridge Extention support */
448 if (!(argp->flags & ISOFSMNT_NORRIP)) {
449 if ((error = bread(isomp->im_devvp,
450 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
451 (isomp->im_bshift - DEV_BSHIFT),
3b568787 452 isomp->logical_block_size, &bp)) != 0)
984263bc
MD
453 goto out;
454
455 rootp = (struct iso_directory_record *)bp->b_data;
456
457 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
458 argp->flags |= ISOFSMNT_NORRIP;
459 } else {
460 argp->flags &= ~ISOFSMNT_GENS;
461 }
462
463 /*
464 * The contents are valid,
465 * but they will get reread as part of another vnode, so...
466 */
467 bp->b_flags |= B_AGE;
468 brelse(bp);
469 bp = NULL;
470 }
471 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
472 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
473
474 if (high_sierra) {
475 /* this effectively ignores all the mount flags */
476 log(LOG_INFO, "cd9660: High Sierra Format\n");
477 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
0961aa92 478 } else {
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MD
479 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
480 default:
481 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
482 break;
483 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
484 isomp->iso_ftype = ISO_FTYPE_9660;
485 break;
486 case 0:
487 log(LOG_INFO, "cd9660: RockRidge Extension\n");
488 isomp->iso_ftype = ISO_FTYPE_RRIP;
489 break;
490 }
0961aa92 491 }
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MD
492
493 /* Decide whether to use the Joliet descriptor */
494
495 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
496 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
497 rootp = (struct iso_directory_record *)
498 sup->root_directory_record;
499 bcopy (rootp, isomp->root, sizeof isomp->root);
500 isomp->root_extent = isonum_733 (rootp->extent);
501 isomp->root_size = isonum_733 (rootp->size);
502 isomp->joliet_level = joliet_level;
503 supbp->b_flags |= B_AGE;
504 }
505
506 if (supbp) {
507 brelse(supbp);
508 supbp = NULL;
509 }
510
dc1be39c
MD
511 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops,
512 cd9660_vnodeop_entries, 0);
513 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops,
514 cd9660_specop_entries, 0);
515 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops,
516 cd9660_fifoop_entries, 0);
0961aa92 517
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518 return 0;
519out:
e4c9c0c8 520 dev->si_mountpoint = NULL;
984263bc
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521 if (bp)
522 brelse(bp);
523 if (pribp)
524 brelse(pribp);
525 if (supbp)
526 brelse(supbp);
527 if (needclose)
3b568787 528 (void)VOP_CLOSE(devvp, FREAD, td);
984263bc
MD
529 if (isomp) {
530 free((caddr_t)isomp, M_ISOFSMNT);
531 mp->mnt_data = (qaddr_t)0;
532 }
533 return error;
534}
535
536/*
537 * unmount system call
538 */
539static int
dadab5e9 540cd9660_unmount(struct mount *mp, int mntflags, struct thread *td)
984263bc 541{
3a1b0fdc 542 struct iso_mnt *isomp;
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MD
543 int error, flags = 0;
544
545 if (mntflags & MNT_FORCE)
546 flags |= FORCECLOSE;
547#if 0
548 mntflushbuf(mp, 0);
549 if (mntinvalbuf(mp))
550 return EBUSY;
551#endif
552 if ((error = vflush(mp, 0, flags)))
553 return (error);
554
555 isomp = VFSTOISOFS(mp);
556
e4c9c0c8 557 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
3b568787 558 error = VOP_CLOSE(isomp->im_devvp, FREAD, td);
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MD
559 vrele(isomp->im_devvp);
560 free((caddr_t)isomp, M_ISOFSMNT);
561 mp->mnt_data = (qaddr_t)0;
562 mp->mnt_flag &= ~MNT_LOCAL;
563 return (error);
564}
565
566/*
567 * Return root of a filesystem
568 */
569static int
3fa8192b 570cd9660_root(struct mount *mp, struct vnode **vpp)
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MD
571{
572 struct iso_mnt *imp = VFSTOISOFS(mp);
573 struct iso_directory_record *dp =
574 (struct iso_directory_record *)imp->root;
575 ino_t ino = isodirino(dp, imp);
576
577 /*
578 * With RRIP we must use the `.' entry of the root directory.
579 * Simply tell vget, that it's a relocated directory.
580 */
581 return (cd9660_vget_internal(mp, ino, vpp,
582 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
583}
584
585/*
586 * Get file system statistics.
587 */
588int
3a1b0fdc 589cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
984263bc 590{
dadab5e9 591 struct iso_mnt *isomp;
984263bc
MD
592
593 isomp = VFSTOISOFS(mp);
594
595 sbp->f_bsize = isomp->logical_block_size;
596 sbp->f_iosize = sbp->f_bsize; /* XXX */
597 sbp->f_blocks = isomp->volume_space_size;
598 sbp->f_bfree = 0; /* total free blocks */
599 sbp->f_bavail = 0; /* blocks free for non superuser */
600 sbp->f_files = 0; /* total files */
601 sbp->f_ffree = 0; /* free file nodes */
602 if (sbp != &mp->mnt_stat) {
603 sbp->f_type = mp->mnt_vfc->vfc_typenum;
984263bc
MD
604 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
605 }
606 return 0;
607}
608
609/*
610 * File handle to vnode
611 *
612 * Have to be really careful about stale file handles:
613 * - check that the inode number is in range
614 * - call iget() to get the locked inode
615 * - check for an unallocated inode (i_mode == 0)
616 * - check that the generation number matches
617 */
618
619struct ifid {
620 ushort ifid_len;
621 ushort ifid_pad;
622 int ifid_ino;
623 long ifid_start;
624};
625
626/* ARGSUSED */
627int
3fa8192b 628cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
984263bc
MD
629{
630 struct ifid *ifhp = (struct ifid *)fhp;
3a1b0fdc 631 struct iso_node *ip;
984263bc
MD
632 struct vnode *nvp;
633 int error;
634
635#ifdef ISOFS_DBG
636 printf("fhtovp: ino %d, start %ld\n",
637 ifhp->ifid_ino, ifhp->ifid_start);
638#endif
639
640 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
641 *vpp = NULLVP;
642 return (error);
643 }
644 ip = VTOI(nvp);
645 if (ip->inode.iso_mode == 0) {
646 vput(nvp);
647 *vpp = NULLVP;
648 return (ESTALE);
649 }
650 *vpp = nvp;
651 return (0);
652}
653
654int
3fa8192b
CP
655cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
656 struct ucred **credanonp)
984263bc 657{
3a1b0fdc
RG
658 struct netcred *np;
659 struct iso_mnt *imp;
984263bc
MD
660
661 imp = VFSTOISOFS(mp);
662
663 /*
664 * Get the export permission structure for this <mp, client> tuple.
665 */
666 np = vfs_export_lookup(mp, &imp->im_export, nam);
667 if (np == NULL)
668 return (EACCES);
669
670 *exflagsp = np->netc_exflags;
671 *credanonp = &np->netc_anon;
672 return (0);
673}
674
675int
3fa8192b 676cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
984263bc
MD
677{
678
679 /*
680 * XXXX
681 * It would be nice if we didn't always set the `relocated' flag
682 * and force the extra read, but I don't want to think about fixing
683 * that right now.
684 */
685 return (cd9660_vget_internal(mp, ino, vpp,
686#if 0
687 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
688#else
689 0,
690#endif
691 (struct iso_directory_record *)0));
692}
693
694int
3fa8192b
CP
695cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
696 int relocated, struct iso_directory_record *isodir)
984263bc 697{
5fd012e0 698 /*struct thread *td = curthread;*/
984263bc
MD
699 struct iso_mnt *imp;
700 struct iso_node *ip;
701 struct buf *bp;
702 struct vnode *vp;
703 dev_t dev;
704 int error;
705
706 imp = VFSTOISOFS(mp);
707 dev = imp->im_dev;
3446c007 708again:
984263bc
MD
709 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
710 return (0);
711
712 /* Allocate a new vnode/iso_node. */
6ddb7618 713 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0);
3446c007 714 if (error) {
984263bc
MD
715 *vpp = NULLVP;
716 return (error);
717 }
718 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
719 M_WAITOK);
720 bzero((caddr_t)ip, sizeof(struct iso_node));
984263bc
MD
721 ip->i_vnode = vp;
722 ip->i_dev = dev;
723 ip->i_number = ino;
724
725 /*
3446c007
MD
726 * Insert it into the inode hash table and check for a collision.
727 * If a collision occurs, throw away the vnode and try again.
984263bc 728 */
3446c007
MD
729 if (cd9660_ihashins(ip) != 0) {
730 printf("debug: cd9660 ihashins collision, retrying\n");
5fd012e0 731 vx_put(vp);
3446c007
MD
732 free(ip, M_ISOFSNODE);
733 goto again;
734 }
735 vp->v_data = ip;
984263bc
MD
736
737 if (isodir == 0) {
738 int lbn, off;
739
740 lbn = lblkno(imp, ino);
741 if (lbn >= imp->volume_space_size) {
5fd012e0 742 vx_put(vp);
984263bc
MD
743 printf("fhtovp: lbn exceed volume space %d\n", lbn);
744 return (ESTALE);
745 }
746
747 off = blkoff(imp, ino);
748 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
5fd012e0 749 vx_put(vp);
984263bc
MD
750 printf("fhtovp: crosses block boundary %d\n",
751 off + ISO_DIRECTORY_RECORD_SIZE);
752 return (ESTALE);
753 }
754
755 error = bread(imp->im_devvp,
756 lbn << (imp->im_bshift - DEV_BSHIFT),
3b568787 757 imp->logical_block_size, &bp);
984263bc 758 if (error) {
5fd012e0 759 vx_put(vp);
984263bc
MD
760 brelse(bp);
761 printf("fhtovp: bread error %d\n",error);
762 return (error);
763 }
764 isodir = (struct iso_directory_record *)(bp->b_data + off);
765
766 if (off + isonum_711(isodir->length) >
767 imp->logical_block_size) {
5fd012e0 768 vx_put(vp);
984263bc
MD
769 if (bp != 0)
770 brelse(bp);
771 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
772 off +isonum_711(isodir->length), off,
773 isonum_711(isodir->length));
774 return (ESTALE);
775 }
776
777#if 0
778 if (isonum_733(isodir->extent) +
779 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
780 if (bp != 0)
781 brelse(bp);
782 printf("fhtovp: file start miss %d vs %d\n",
783 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
784 ifhp->ifid_start);
785 return (ESTALE);
786 }
787#endif
788 } else
789 bp = 0;
790
791 ip->i_mnt = imp;
792 ip->i_devvp = imp->im_devvp;
597aea93 793 vref(ip->i_devvp);
984263bc
MD
794
795 if (relocated) {
796 /*
797 * On relocated directories we must
798 * read the `.' entry out of a dir.
799 */
800 ip->iso_start = ino >> imp->im_bshift;
801 if (bp != 0)
802 brelse(bp);
803 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
5fd012e0 804 vx_put(vp);
984263bc
MD
805 return (error);
806 }
807 isodir = (struct iso_directory_record *)bp->b_data;
808 }
809
810 ip->iso_extent = isonum_733(isodir->extent);
811 ip->i_size = isonum_733(isodir->size);
812 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
813
814 /*
815 * Setup time stamp, attribute
816 */
817 vp->v_type = VNON;
818 switch (imp->iso_ftype) {
819 default: /* ISO_FTYPE_9660 */
820 {
821 struct buf *bp2;
822 int off;
823 if ((imp->im_flags & ISOFSMNT_EXTATT)
824 && (off = isonum_711(isodir->ext_attr_length)))
825 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
826 &bp2);
827 else
828 bp2 = NULL;
829 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
830 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
831 if (bp2)
832 brelse(bp2);
833 break;
834 }
835 case ISO_FTYPE_RRIP:
836 cd9660_rrip_analyze(isodir, ip, imp);
837 break;
838 }
839
840 if (bp != 0)
841 brelse(bp);
842
843 /*
844 * Initialize the associated vnode
845 */
846 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
847 case VFIFO:
6ddb7618 848 vp->v_ops = &mp->mnt_vn_fifo_ops;
984263bc
MD
849 break;
850 case VCHR:
851 case VBLK:
6ddb7618 852 vp->v_ops = &mp->mnt_vn_spec_ops;
984263bc
MD
853 addaliasu(vp, ip->inode.iso_rdev);
854 break;
855 default:
856 break;
857 }
858
859 if (ip->iso_extent == imp->root_extent)
860 vp->v_flag |= VROOT;
861
862 /*
5fd012e0 863 * Return the locked and refd vp
984263bc 864 */
984263bc
MD
865 *vpp = vp;
866 return (0);
867}
868
869/*
870 * Vnode pointer to File handle
871 */
872/* ARGSUSED */
873int
3fa8192b 874cd9660_vptofh(struct vnode *vp, struct fid *fhp)
984263bc 875{
3a1b0fdc
RG
876 struct iso_node *ip = VTOI(vp);
877 struct ifid *ifhp;
984263bc
MD
878
879 ifhp = (struct ifid *)fhp;
880 ifhp->ifid_len = sizeof(struct ifid);
881
882 ifhp->ifid_ino = ip->i_number;
883 ifhp->ifid_start = ip->iso_start;
884
885#ifdef ISOFS_DBG
886 printf("vptofh: ino %d, start %ld\n",
887 ifhp->ifid_ino,ifhp->ifid_start);
888#endif
889 return 0;
890}