3 * The Regents of the University of California. All rights reserved.
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).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
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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
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 $
40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.46 2008/09/17 21:44:23 dillon Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
47 #include <sys/nlookup.h>
48 #include <sys/kernel.h>
49 #include <sys/vnode.h>
50 #include <sys/mount.h>
54 #include <sys/fcntl.h>
55 #include <sys/malloc.h>
57 #include <sys/syslog.h>
58 #include <sys/iconv.h>
60 #include <vm/vm_zone.h>
64 #include "cd9660_node.h"
65 #include "cd9660_mount.h"
67 extern struct vop_ops cd9660_vnode_vops;
68 extern struct vop_ops cd9660_spec_vops;
69 extern struct vop_ops cd9660_fifo_vops;
71 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
72 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
74 struct iconv_functions *cd9660_iconv = NULL;
76 static int cd9660_mount (struct mount *, char *, caddr_t, struct ucred *);
77 static int cd9660_unmount (struct mount *, int);
78 static int cd9660_root (struct mount *, struct vnode **);
79 static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *);
80 static int cd9660_vget (struct mount *, ino_t, struct vnode **);
81 static int cd9660_fhtovp (struct mount *, struct vnode *rootvp,
82 struct fid *, struct vnode **);
83 static int cd9660_checkexp (struct mount *, struct sockaddr *,
84 int *, struct ucred **);
85 static int cd9660_vptofh (struct vnode *, struct fid *);
87 static struct vfsops cd9660_vfsops = {
88 .vfs_mount = cd9660_mount,
89 .vfs_unmount = cd9660_unmount,
90 .vfs_root = cd9660_root,
91 .vfs_statfs = cd9660_statfs,
92 .vfs_sync = vfs_stdsync,
93 .vfs_vget = cd9660_vget,
94 .vfs_fhtovp = cd9660_fhtovp,
95 .vfs_checkexp = cd9660_checkexp,
96 .vfs_vptofh = cd9660_vptofh,
97 .vfs_init = cd9660_init,
98 .vfs_uninit = cd9660_uninit,
100 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
101 MODULE_VERSION(cd9660, 1);
105 * Called by vfs_mountroot when iso is going to be mounted as root.
108 static int iso_get_ssector (cdev_t dev);
109 static int iso_mountfs (struct vnode *devvp, struct mount *mp,
110 struct iso_args *argp);
113 * Try to find the start of the last data track on this CD-ROM. This
114 * is used to mount the last session of a multi-session CD. Bail out
115 * and return 0 if we fail, this is always a safe bet.
118 iso_get_ssector(cdev_t dev)
120 struct ioc_toc_header h;
121 struct ioc_read_toc_single_entry t;
124 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, proc0.p_ucred) != 0)
127 for (i = h.ending_track; i >= 0; i--) {
128 t.address_format = CD_LBA_FORMAT;
130 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, proc0.p_ucred) != 0) {
133 if ((t.entry.control & 4) != 0)
134 /* found a data track */
141 return ntohl(t.entry.addr.lba);
145 iso_mountroot(struct mount *mp)
147 struct iso_args args;
148 struct vnode *rootvp;
151 if ((error = bdevvp(rootdev, &rootvp))) {
152 kprintf("iso_mountroot: can't find rootvp\n");
155 args.flags = ISOFSMNT_ROOT;
157 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
158 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL);
163 args.ssector = iso_get_ssector(rootdev);
165 VOP_CLOSE(rootvp, FREAD);
168 kprintf("iso_mountroot(): using session at block %d\n",
170 if ((error = iso_mountfs(rootvp, mp, &args)) != 0)
173 cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred);
183 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
186 struct iso_args args;
190 struct iso_mnt *imp = 0;
191 struct nlookupdata nd;
193 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) {
194 return (iso_mountroot(mp));
196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
199 if ((mp->mnt_flag & MNT_RDONLY) == 0)
203 * If updating, check whether changing from read-only to
204 * read/write; if there is no device name, that's all we do.
206 if (mp->mnt_flag & MNT_UPDATE) {
207 imp = VFSTOISOFS(mp);
209 return (vfs_export(mp, &imp->im_export, &args.export));
212 * Not an update, or updating the name: look up the name
213 * and verify that it refers to a sensible block device.
216 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
218 error = nlookup(&nd);
220 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
225 if (!vn_isdisk(devvp, &error)) {
231 * Verify that user has necessary permissions on the device,
232 * or has superuser abilities
235 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
236 error = VOP_ACCESS(devvp, accessmode, cred);
238 error = priv_check_cred(cred, PRIV_ROOT, 0);
245 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
246 error = iso_mountfs(devvp, mp, &args);
248 if (devvp != imp->im_devvp)
249 error = EINVAL; /* needs translation */
257 imp = VFSTOISOFS(mp);
258 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
260 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
261 cd9660_statfs(mp, &mp->mnt_stat, cred);
266 * Common code for mount and mountroot
269 iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp)
271 struct iso_mnt *isomp = NULL;
272 struct buf *bp = NULL;
273 struct buf *pribp = NULL, *supbp = NULL;
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 char *cs_local, *cs_disk;
289 if (!(mp->mnt_flag & MNT_RDONLY))
293 * Disallow multiple mounts of the same device.
294 * Disallow mounting of a device that is currently in use
295 * Flush out any old buffers remaining from a previous use.
297 if ((error = vfs_mountedon(devvp)))
299 if (count_udev(devvp->v_umajor, devvp->v_uminor) > 0)
301 if ((error = vinvalbuf(devvp, V_SAVE, 0, 0)))
304 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
305 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL);
310 if (dev->si_iosize_max != 0)
311 mp->mnt_iosize_max = dev->si_iosize_max;
312 if (mp->mnt_iosize_max > MAXPHYS)
313 mp->mnt_iosize_max = MAXPHYS;
317 /* This is the "logical sector size". The standard says this
318 * should be 2048 or the physical sector size on the device,
319 * whichever is greater. For now, we'll just use a constant.
321 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
324 for (iso_blknum = 16 + argp->ssector;
325 iso_blknum < 100 + argp->ssector;
327 if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize,
328 iso_bsize, &bp)) != 0)
331 vdp = (struct iso_volume_descriptor *)bp->b_data;
332 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
333 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
334 sizeof vdp->id) != 0) {
340 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
345 pri = (struct iso_primary_descriptor *)vdp;
347 (struct iso_sierra_primary_descriptor *)vdp;
351 case ISO_VD_SUPPLEMENTARY:
355 sup = (struct iso_supplementary_descriptor *)vdp;
357 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
358 if (bcmp(sup->escape, "%/@", 3) == 0)
360 if (bcmp(sup->escape, "%/C", 3) == 0)
362 if (bcmp(sup->escape, "%/E", 3) == 0)
365 if ((isonum_711 (sup->flags) & 1) &&
366 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
395 isonum_723 (high_sierra?
396 pri_sierra->logical_block_size:
397 pri->logical_block_size);
399 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
400 || (logical_block_size & (logical_block_size - 1)) != 0) {
405 rootp = (struct iso_directory_record *)
407 pri_sierra->root_directory_record:
408 pri->root_directory_record);
410 isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
411 isomp->logical_block_size = logical_block_size;
412 isomp->volume_space_size =
413 isonum_733 (high_sierra?
414 pri_sierra->volume_space_size:
415 pri->volume_space_size);
416 isomp->joliet_level = 0;
418 * Since an ISO9660 multi-session CD can also access previous
419 * sessions, we have to include them into the space consider-
420 * ations. This doesn't yield a very accurate number since
421 * parts of the old sessions might be inaccessible now, but we
422 * can't do much better. This is also important for the NFS
423 * filehandle validation.
425 isomp->volume_space_size += argp->ssector;
426 bcopy (rootp, isomp->root, sizeof isomp->root);
427 isomp->root_extent = isonum_733 (rootp->extent);
428 isomp->root_size = isonum_733 (rootp->size);
430 isomp->im_bmask = logical_block_size - 1;
431 isomp->im_bshift = ffs(logical_block_size) - 1;
433 pribp->b_flags |= B_AGE;
437 mp->mnt_data = (qaddr_t)isomp;
438 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
439 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
440 mp->mnt_maxsymlinklen = 0;
441 mp->mnt_flag |= MNT_LOCAL;
442 isomp->im_mountp = mp;
444 isomp->im_devvp = devvp;
446 dev->si_mountpoint = mp;
448 /* Check the Rock Ridge Extention support */
449 if (!(argp->flags & ISOFSMNT_NORRIP)) {
450 if ((error = bread(isomp->im_devvp,
451 lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)),
452 isomp->logical_block_size, &bp)) != 0)
455 rootp = (struct iso_directory_record *)bp->b_data;
457 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
458 argp->flags |= ISOFSMNT_NORRIP;
460 argp->flags &= ~ISOFSMNT_GENS;
464 * The contents are valid,
465 * but they will get reread as part of another vnode, so...
467 bp->b_flags |= B_AGE;
471 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
472 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
473 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
475 cs_disk = "UTF-16BE";
476 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
477 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
479 isomp->im_d2l = NULL;
480 isomp->im_l2d = NULL;
484 /* this effectively ignores all the mount flags */
485 log(LOG_INFO, "cd9660: High Sierra Format\n");
486 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
488 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
490 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
492 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
493 isomp->iso_ftype = ISO_FTYPE_9660;
496 log(LOG_INFO, "cd9660: RockRidge Extension\n");
497 isomp->iso_ftype = ISO_FTYPE_RRIP;
502 /* Decide whether to use the Joliet descriptor */
504 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
505 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
506 rootp = (struct iso_directory_record *)
507 sup->root_directory_record;
508 bcopy (rootp, isomp->root, sizeof isomp->root);
509 isomp->root_extent = isonum_733 (rootp->extent);
510 isomp->root_size = isonum_733 (rootp->size);
511 isomp->joliet_level = joliet_level;
512 supbp->b_flags |= B_AGE;
520 vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops);
521 vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops);
522 vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops);
526 dev->si_mountpoint = NULL;
534 VOP_CLOSE(devvp, FREAD);
536 kfree((caddr_t)isomp, M_ISOFSMNT);
537 mp->mnt_data = (qaddr_t)0;
543 * unmount system call
546 cd9660_unmount(struct mount *mp, int mntflags)
548 struct iso_mnt *isomp;
549 int error, flags = 0;
551 if (mntflags & MNT_FORCE)
558 if ((error = vflush(mp, 0, flags)))
561 isomp = VFSTOISOFS(mp);
563 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
565 cd9660_iconv->close(isomp->im_d2l);
567 cd9660_iconv->close(isomp->im_l2d);
570 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
571 error = VOP_CLOSE(isomp->im_devvp, FREAD);
572 vrele(isomp->im_devvp);
573 kfree((caddr_t)isomp, M_ISOFSMNT);
574 mp->mnt_data = (qaddr_t)0;
575 mp->mnt_flag &= ~MNT_LOCAL;
580 * Return root of a filesystem
583 cd9660_root(struct mount *mp, struct vnode **vpp)
585 struct iso_mnt *imp = VFSTOISOFS(mp);
586 struct iso_directory_record *dp =
587 (struct iso_directory_record *)imp->root;
588 ino_t ino = isodirino(dp, imp);
591 * With RRIP we must use the `.' entry of the root directory.
592 * Simply tell vget, that it's a relocated directory.
594 return (cd9660_vget_internal(mp, ino, vpp,
595 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
599 * Get file system statistics.
602 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
604 struct iso_mnt *isomp;
606 isomp = VFSTOISOFS(mp);
608 sbp->f_bsize = isomp->logical_block_size;
609 sbp->f_iosize = sbp->f_bsize; /* XXX */
610 sbp->f_blocks = isomp->volume_space_size;
611 sbp->f_bfree = 0; /* total free blocks */
612 sbp->f_bavail = 0; /* blocks free for non superuser */
613 sbp->f_files = 0; /* total files */
614 sbp->f_ffree = 0; /* free file nodes */
615 if (sbp != &mp->mnt_stat) {
616 sbp->f_type = mp->mnt_vfc->vfc_typenum;
617 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
623 * File handle to vnode
625 * Have to be really careful about stale file handles:
626 * - check that the inode number is in range
627 * - call iget() to get the locked inode
628 * - check for an unallocated inode (i_mode == 0)
629 * - check that the generation number matches
641 cd9660_fhtovp(struct mount *mp, struct vnode *rootvp,
642 struct fid *fhp, struct vnode **vpp)
644 struct ifid *ifhp = (struct ifid *)fhp;
650 kprintf("fhtovp: ino %d, start %ld\n",
651 ifhp->ifid_ino, ifhp->ifid_start);
654 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
659 if (ip->inode.iso_mode == 0) {
669 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
670 struct ucred **credanonp)
675 imp = VFSTOISOFS(mp);
678 * Get the export permission structure for this <mp, client> tuple.
680 np = vfs_export_lookup(mp, &imp->im_export, nam);
684 *exflagsp = np->netc_exflags;
685 *credanonp = &np->netc_anon;
690 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
695 * It would be nice if we didn't always set the `relocated' flag
696 * and force the extra read, but I don't want to think about fixing
699 return (cd9660_vget_internal(mp, ino, vpp,
701 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
709 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
710 int relocated, struct iso_directory_record *isodir)
719 imp = VFSTOISOFS(mp);
722 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
725 /* Allocate a new vnode/iso_node. */
726 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0);
731 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
738 * Insert it into the inode hash table and check for a collision.
739 * If a collision occurs, throw away the vnode and try again.
741 if (cd9660_ihashins(ip) != 0) {
742 kprintf("debug: cd9660 ihashins collision, retrying\n");
744 kfree(ip, M_ISOFSNODE);
749 if (isodir == NULL) {
752 lbn = lblkno(imp, ino);
753 if (lbn >= imp->volume_space_size) {
755 kprintf("fhtovp: lbn exceed volume space %d\n", lbn);
759 off = blkoff(imp, ino);
760 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
762 kprintf("fhtovp: crosses block boundary %d\n",
763 off + ISO_DIRECTORY_RECORD_SIZE);
767 error = bread(imp->im_devvp,
769 imp->logical_block_size, &bp);
773 kprintf("fhtovp: bread error %d\n",error);
776 isodir = (struct iso_directory_record *)(bp->b_data + off);
778 if (off + isonum_711(isodir->length) >
779 imp->logical_block_size) {
783 kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
784 off +isonum_711(isodir->length), off,
785 isonum_711(isodir->length));
790 if (isonum_733(isodir->extent) +
791 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
794 kprintf("fhtovp: file start miss %d vs %d\n",
795 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
804 ip->i_devvp = imp->im_devvp;
809 * On relocated directories we must
810 * read the `.' entry out of a dir.
812 ip->iso_start = ino >> imp->im_bshift;
815 if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
819 isodir = (struct iso_directory_record *)bp->b_data;
822 ip->iso_extent = isonum_733(isodir->extent);
823 ip->i_size = isonum_733(isodir->size);
824 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
827 * Setup time stamp, attribute
830 switch (imp->iso_ftype) {
831 default: /* ISO_FTYPE_9660 */
835 if ((imp->im_flags & ISOFSMNT_EXTATT)
836 && (off = isonum_711(isodir->ext_attr_length)))
837 cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
841 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
842 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
848 cd9660_rrip_analyze(isodir, ip, imp);
856 * Initialize the associated vnode
858 vp->v_type = IFTOVT(ip->inode.iso_mode);
860 switch (vp->v_type) {
862 vp->v_ops = &mp->mnt_vn_fifo_ops;
866 vp->v_ops = &mp->mnt_vn_spec_ops;
867 addaliasu(vp, umajor(ip->inode.iso_rdev),
868 uminor(ip->inode.iso_rdev));
872 vinitvmio(vp, ip->i_size);
878 if (ip->iso_extent == imp->root_extent)
882 * Return the locked and refd vp
889 * Vnode pointer to File handle
893 cd9660_vptofh(struct vnode *vp, struct fid *fhp)
895 struct iso_node *ip = VTOI(vp);
898 ifhp = (struct ifid *)fhp;
899 ifhp->ifid_len = sizeof(struct ifid);
901 ifhp->ifid_ino = ip->i_number;
902 ifhp->ifid_start = ip->iso_start;
905 kprintf("vptofh: ino %d, start %ld\n",
906 ifhp->ifid_ino,ifhp->ifid_start);