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
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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
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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 1.23 2004/11/12 00:09:34 dillon Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
46 #include <sys/nlookup.h>
47 #include <sys/kernel.h>
48 #include <sys/vnode.h>
49 #include <sys/mount.h>
53 #include <sys/fcntl.h>
54 #include <sys/malloc.h>
56 #include <sys/syslog.h>
58 #include <vm/vm_zone.h>
62 #include "cd9660_node.h"
63 #include "cd9660_mount.h"
65 extern struct vnodeopv_entry_desc cd9660_vnodeop_entries[];
66 extern struct vnodeopv_entry_desc cd9660_specop_entries[];
67 extern struct vnodeopv_entry_desc cd9660_fifoop_entries[];
69 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
70 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
72 static int cd9660_mount (struct mount *, char *, caddr_t, struct thread *);
73 static int cd9660_unmount (struct mount *, int, struct thread *);
74 static int cd9660_root (struct mount *, struct vnode **);
75 static int cd9660_statfs (struct mount *, struct statfs *, struct thread *);
76 static int cd9660_vget (struct mount *, ino_t, struct vnode **);
77 static int cd9660_fhtovp (struct mount *, struct fid *, struct vnode **);
78 static int cd9660_checkexp (struct mount *, struct sockaddr *,
79 int *, struct ucred **);
80 static int cd9660_vptofh (struct vnode *, struct fid *);
82 static struct vfsops cd9660_vfsops = {
98 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
99 MODULE_VERSION(cd9660, 1);
103 * Called by vfs_mountroot when iso is going to be mounted as root.
106 static int iso_get_ssector (dev_t dev, struct thread *td);
107 static int iso_mountfs (struct vnode *devvp, struct mount *mp,
108 struct thread *td, struct iso_args *argp);
111 * Try to find the start of the last data track on this CD-ROM. This
112 * is used to mount the last session of a multi-session CD. Bail out
113 * and return 0 if we fail, this is always a safe bet.
116 iso_get_ssector(dev_t dev, struct thread *td)
118 struct ioc_toc_header h;
119 struct ioc_read_toc_single_entry t;
122 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
125 for (i = h.ending_track; i >= 0; i--) {
126 t.address_format = CD_LBA_FORMAT;
128 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) {
131 if ((t.entry.control & 4) != 0)
132 /* found a data track */
139 return ntohl(t.entry.addr.lba);
142 static int iso_mountroot (struct mount *mp, struct thread *td);
145 iso_mountroot(struct mount *mp, struct thread *td)
147 struct iso_args args;
148 struct vnode *rootvp;
151 if ((error = bdevvp(rootdev, &rootvp))) {
152 printf("iso_mountroot: can't find rootvp\n");
155 args.flags = ISOFSMNT_ROOT;
157 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
158 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL, td);
159 VOP_UNLOCK(rootvp, 0, td);
163 args.ssector = iso_get_ssector(rootdev, td);
165 (void)VOP_CLOSE(rootvp, FREAD, td);
168 printf("iso_mountroot(): using session at block %d\n",
170 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
173 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
183 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct thread *td)
186 struct iso_args args;
190 struct iso_mnt *imp = 0;
191 struct nlookupdata nd;
193 if ((mp->mnt_flag & MNT_ROOTFS) != 0) {
194 return (iso_mountroot(mp, td));
196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
199 if ((mp->mnt_flag & MNT_RDONLY) == 0)
202 KKASSERT(td->td_proc);
205 * If updating, check whether changing from read-only to
206 * read/write; if there is no device name, that's all we do.
208 if (mp->mnt_flag & MNT_UPDATE) {
209 imp = VFSTOISOFS(mp);
211 return (vfs_export(mp, &imp->im_export, &args.export));
214 * Not an update, or updating the name: look up the name
215 * and verify that it refers to a sensible block device.
218 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
220 error = nlookup(&nd);
222 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp);
227 if (!vn_isdisk(devvp, &error)) {
233 * Verify that user has necessary permissions on the device,
234 * or has superuser abilities
237 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
238 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td);
245 VOP_UNLOCK(devvp, 0, td);
247 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
248 error = iso_mountfs(devvp, mp, td, &args);
250 if (devvp != imp->im_devvp)
251 error = EINVAL; /* needs translation */
259 imp = VFSTOISOFS(mp);
260 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
261 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
262 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
264 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
265 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
270 * Common code for mount and mountroot
273 iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
274 struct iso_args *argp)
276 struct iso_mnt *isomp = NULL;
277 struct buf *bp = NULL;
278 struct buf *pribp = NULL, *supbp = NULL;
286 struct iso_volume_descriptor *vdp = 0;
287 struct iso_primary_descriptor *pri = NULL;
288 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
289 struct iso_supplementary_descriptor *sup = NULL;
290 struct iso_directory_record *rootp;
291 int logical_block_size;
293 if (!(mp->mnt_flag & MNT_RDONLY))
297 * Disallow multiple mounts of the same device.
298 * Disallow mounting of a device that is currently in use
299 * Flush out any old buffers remaining from a previous use.
301 if ((error = vfs_mountedon(devvp)))
303 if (count_udev(devvp->v_udev) > 0)
305 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
308 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
309 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td);
310 VOP_UNLOCK(devvp, 0, td);
314 if (dev->si_iosize_max != 0)
315 mp->mnt_iosize_max = dev->si_iosize_max;
316 if (mp->mnt_iosize_max > MAXPHYS)
317 mp->mnt_iosize_max = MAXPHYS;
321 /* This is the "logical sector size". The standard says this
322 * should be 2048 or the physical sector size on the device,
323 * whichever is greater. For now, we'll just use a constant.
325 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
328 for (iso_blknum = 16 + argp->ssector;
329 iso_blknum < 100 + argp->ssector;
331 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
332 iso_bsize, &bp)) != 0)
335 vdp = (struct iso_volume_descriptor *)bp->b_data;
336 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
337 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
338 sizeof vdp->id) != 0) {
344 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
349 pri = (struct iso_primary_descriptor *)vdp;
351 (struct iso_sierra_primary_descriptor *)vdp;
355 case ISO_VD_SUPPLEMENTARY:
359 sup = (struct iso_supplementary_descriptor *)vdp;
361 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
362 if (bcmp(sup->escape, "%/@", 3) == 0)
364 if (bcmp(sup->escape, "%/C", 3) == 0)
366 if (bcmp(sup->escape, "%/E", 3) == 0)
369 if ((isonum_711 (sup->flags) & 1) &&
370 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
399 isonum_723 (high_sierra?
400 pri_sierra->logical_block_size:
401 pri->logical_block_size);
403 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
404 || (logical_block_size & (logical_block_size - 1)) != 0) {
409 rootp = (struct iso_directory_record *)
411 pri_sierra->root_directory_record:
412 pri->root_directory_record);
414 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
415 isomp->logical_block_size = logical_block_size;
416 isomp->volume_space_size =
417 isonum_733 (high_sierra?
418 pri_sierra->volume_space_size:
419 pri->volume_space_size);
420 isomp->joliet_level = 0;
422 * Since an ISO9660 multi-session CD can also access previous
423 * sessions, we have to include them into the space consider-
424 * ations. This doesn't yield a very accurate number since
425 * parts of the old sessions might be inaccessible now, but we
426 * can't do much better. This is also important for the NFS
427 * filehandle validation.
429 isomp->volume_space_size += argp->ssector;
430 bcopy (rootp, isomp->root, sizeof isomp->root);
431 isomp->root_extent = isonum_733 (rootp->extent);
432 isomp->root_size = isonum_733 (rootp->size);
434 isomp->im_bmask = logical_block_size - 1;
435 isomp->im_bshift = ffs(logical_block_size) - 1;
437 pribp->b_flags |= B_AGE;
441 mp->mnt_data = (qaddr_t)isomp;
442 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
443 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
444 mp->mnt_maxsymlinklen = 0;
445 mp->mnt_flag |= MNT_LOCAL;
446 isomp->im_mountp = mp;
448 isomp->im_devvp = devvp;
450 dev->si_mountpoint = mp;
452 /* Check the Rock Ridge Extention support */
453 if (!(argp->flags & ISOFSMNT_NORRIP)) {
454 if ((error = bread(isomp->im_devvp,
455 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
456 (isomp->im_bshift - DEV_BSHIFT),
457 isomp->logical_block_size, &bp)) != 0)
460 rootp = (struct iso_directory_record *)bp->b_data;
462 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
463 argp->flags |= ISOFSMNT_NORRIP;
465 argp->flags &= ~ISOFSMNT_GENS;
469 * The contents are valid,
470 * but they will get reread as part of another vnode, so...
472 bp->b_flags |= B_AGE;
476 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
477 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
480 /* this effectively ignores all the mount flags */
481 log(LOG_INFO, "cd9660: High Sierra Format\n");
482 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
484 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
486 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
488 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
489 isomp->iso_ftype = ISO_FTYPE_9660;
492 log(LOG_INFO, "cd9660: RockRidge Extension\n");
493 isomp->iso_ftype = ISO_FTYPE_RRIP;
498 /* Decide whether to use the Joliet descriptor */
500 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
501 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
502 rootp = (struct iso_directory_record *)
503 sup->root_directory_record;
504 bcopy (rootp, isomp->root, sizeof isomp->root);
505 isomp->root_extent = isonum_733 (rootp->extent);
506 isomp->root_size = isonum_733 (rootp->size);
507 isomp->joliet_level = joliet_level;
508 supbp->b_flags |= B_AGE;
516 vfs_add_vnodeops(&mp->mnt_vn_ops, cd9660_vnodeop_entries);
517 vfs_add_vnodeops(&mp->mnt_vn_spec_ops, cd9660_specop_entries);
518 vfs_add_vnodeops(&mp->mnt_vn_fifo_ops, cd9660_fifoop_entries);
522 dev->si_mountpoint = NULL;
530 (void)VOP_CLOSE(devvp, FREAD, td);
532 free((caddr_t)isomp, M_ISOFSMNT);
533 mp->mnt_data = (qaddr_t)0;
539 * unmount system call
542 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td)
544 struct iso_mnt *isomp;
545 int error, flags = 0;
547 if (mntflags & MNT_FORCE)
554 if ((error = vflush(mp, 0, flags)))
557 isomp = VFSTOISOFS(mp);
559 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
560 error = VOP_CLOSE(isomp->im_devvp, FREAD, td);
561 vrele(isomp->im_devvp);
562 free((caddr_t)isomp, M_ISOFSMNT);
563 mp->mnt_data = (qaddr_t)0;
564 mp->mnt_flag &= ~MNT_LOCAL;
569 * Return root of a filesystem
572 cd9660_root(struct mount *mp, struct vnode **vpp)
574 struct iso_mnt *imp = VFSTOISOFS(mp);
575 struct iso_directory_record *dp =
576 (struct iso_directory_record *)imp->root;
577 ino_t ino = isodirino(dp, imp);
580 * With RRIP we must use the `.' entry of the root directory.
581 * Simply tell vget, that it's a relocated directory.
583 return (cd9660_vget_internal(mp, ino, vpp,
584 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
588 * Get file system statistics.
591 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
593 struct iso_mnt *isomp;
595 isomp = VFSTOISOFS(mp);
597 sbp->f_bsize = isomp->logical_block_size;
598 sbp->f_iosize = sbp->f_bsize; /* XXX */
599 sbp->f_blocks = isomp->volume_space_size;
600 sbp->f_bfree = 0; /* total free blocks */
601 sbp->f_bavail = 0; /* blocks free for non superuser */
602 sbp->f_files = 0; /* total files */
603 sbp->f_ffree = 0; /* free file nodes */
604 if (sbp != &mp->mnt_stat) {
605 sbp->f_type = mp->mnt_vfc->vfc_typenum;
606 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
607 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
613 * File handle to vnode
615 * Have to be really careful about stale file handles:
616 * - check that the inode number is in range
617 * - call iget() to get the locked inode
618 * - check for an unallocated inode (i_mode == 0)
619 * - check that the generation number matches
631 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
633 struct ifid *ifhp = (struct ifid *)fhp;
639 printf("fhtovp: ino %d, start %ld\n",
640 ifhp->ifid_ino, ifhp->ifid_start);
643 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
648 if (ip->inode.iso_mode == 0) {
658 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
659 struct ucred **credanonp)
664 imp = VFSTOISOFS(mp);
667 * Get the export permission structure for this <mp, client> tuple.
669 np = vfs_export_lookup(mp, &imp->im_export, nam);
673 *exflagsp = np->netc_exflags;
674 *credanonp = &np->netc_anon;
679 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
684 * It would be nice if we didn't always set the `relocated' flag
685 * and force the extra read, but I don't want to think about fixing
688 return (cd9660_vget_internal(mp, ino, vpp,
690 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
694 (struct iso_directory_record *)0));
698 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
699 int relocated, struct iso_directory_record *isodir)
701 /*struct thread *td = curthread;*/
709 imp = VFSTOISOFS(mp);
712 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
715 /* Allocate a new vnode/iso_node. */
716 error = getnewvnode(VT_ISOFS, mp, mp->mnt_vn_ops, &vp, 0, 0);
721 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
723 bzero((caddr_t)ip, sizeof(struct iso_node));
729 * Insert it into the inode hash table and check for a collision.
730 * If a collision occurs, throw away the vnode and try again.
732 if (cd9660_ihashins(ip) != 0) {
733 printf("debug: cd9660 ihashins collision, retrying\n");
735 free(ip, M_ISOFSNODE);
743 lbn = lblkno(imp, ino);
744 if (lbn >= imp->volume_space_size) {
746 printf("fhtovp: lbn exceed volume space %d\n", lbn);
750 off = blkoff(imp, ino);
751 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
753 printf("fhtovp: crosses block boundary %d\n",
754 off + ISO_DIRECTORY_RECORD_SIZE);
758 error = bread(imp->im_devvp,
759 lbn << (imp->im_bshift - DEV_BSHIFT),
760 imp->logical_block_size, &bp);
764 printf("fhtovp: bread error %d\n",error);
767 isodir = (struct iso_directory_record *)(bp->b_data + off);
769 if (off + isonum_711(isodir->length) >
770 imp->logical_block_size) {
774 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
775 off +isonum_711(isodir->length), off,
776 isonum_711(isodir->length));
781 if (isonum_733(isodir->extent) +
782 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
785 printf("fhtovp: file start miss %d vs %d\n",
786 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
795 ip->i_devvp = imp->im_devvp;
800 * On relocated directories we must
801 * read the `.' entry out of a dir.
803 ip->iso_start = ino >> imp->im_bshift;
806 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
810 isodir = (struct iso_directory_record *)bp->b_data;
813 ip->iso_extent = isonum_733(isodir->extent);
814 ip->i_size = isonum_733(isodir->size);
815 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
818 * Setup time stamp, attribute
821 switch (imp->iso_ftype) {
822 default: /* ISO_FTYPE_9660 */
826 if ((imp->im_flags & ISOFSMNT_EXTATT)
827 && (off = isonum_711(isodir->ext_attr_length)))
828 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
832 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
833 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
839 cd9660_rrip_analyze(isodir, ip, imp);
847 * Initialize the associated vnode
849 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
851 vp->v_ops = mp->mnt_vn_fifo_ops;
855 vp->v_ops = mp->mnt_vn_spec_ops;
856 addaliasu(vp, ip->inode.iso_rdev);
862 if (ip->iso_extent == imp->root_extent)
866 * Return the locked and refd vp
873 * Vnode pointer to File handle
877 cd9660_vptofh(struct vnode *vp, struct fid *fhp)
879 struct iso_node *ip = VTOI(vp);
882 ifhp = (struct ifid *)fhp;
883 ifhp->ifid_len = sizeof(struct ifid);
885 ifhp->ifid_ino = ip->i_number;
886 ifhp->ifid_start = ip->iso_start;
889 printf("vptofh: ino %d, start %ld\n",
890 ifhp->ifid_ino,ifhp->ifid_start);