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 1.29 2006/01/13 21:09:27 swildner 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 = {
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,
95 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
96 MODULE_VERSION(cd9660, 1);
100 * Called by vfs_mountroot when iso is going to be mounted as root.
103 static int iso_get_ssector (dev_t dev, struct thread *td);
104 static int iso_mountfs (struct vnode *devvp, struct mount *mp,
105 struct thread *td, struct iso_args *argp);
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.
113 iso_get_ssector(dev_t dev, struct thread *td)
115 struct ioc_toc_header h;
116 struct ioc_read_toc_single_entry t;
119 if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
122 for (i = h.ending_track; i >= 0; i--) {
123 t.address_format = CD_LBA_FORMAT;
125 if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0) {
128 if ((t.entry.control & 4) != 0)
129 /* found a data track */
136 return ntohl(t.entry.addr.lba);
139 static int iso_mountroot (struct mount *mp, struct thread *td);
142 iso_mountroot(struct mount *mp, struct thread *td)
144 struct iso_args args;
145 struct vnode *rootvp;
148 if ((error = bdevvp(rootdev, &rootvp))) {
149 printf("iso_mountroot: can't find rootvp\n");
152 args.flags = ISOFSMNT_ROOT;
154 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
155 error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL, td);
156 VOP_UNLOCK(rootvp, 0, td);
160 args.ssector = iso_get_ssector(rootdev, td);
162 VOP_CLOSE(rootvp, FREAD, td);
165 printf("iso_mountroot(): using session at block %d\n",
167 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
170 cd9660_statfs(mp, &mp->mnt_stat, td);
180 cd9660_mount(struct mount *mp, char *path, caddr_t data, struct thread *td)
183 struct iso_args args;
187 struct iso_mnt *imp = 0;
188 struct nlookupdata nd;
190 if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) {
191 return (iso_mountroot(mp, td));
193 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
196 if ((mp->mnt_flag & MNT_RDONLY) == 0)
199 KKASSERT(td->td_proc);
202 * If updating, check whether changing from read-only to
203 * read/write; if there is no device name, that's all we do.
205 if (mp->mnt_flag & MNT_UPDATE) {
206 imp = VFSTOISOFS(mp);
208 return (vfs_export(mp, &imp->im_export, &args.export));
211 * Not an update, or updating the name: look up the name
212 * and verify that it refers to a sensible block device.
215 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
217 error = nlookup(&nd);
219 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp);
224 if (!vn_isdisk(devvp, &error)) {
230 * Verify that user has necessary permissions on the device,
231 * or has superuser abilities
234 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
235 error = VOP_ACCESS(devvp, accessmode, td->td_proc->p_ucred, td);
242 VOP_UNLOCK(devvp, 0, td);
244 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
245 error = iso_mountfs(devvp, mp, td, &args);
247 if (devvp != imp->im_devvp)
248 error = EINVAL; /* needs translation */
256 imp = VFSTOISOFS(mp);
257 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
259 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
260 cd9660_statfs(mp, &mp->mnt_stat, td);
265 * Common code for mount and mountroot
268 iso_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
269 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;
288 if (!(mp->mnt_flag & MNT_RDONLY))
292 * Disallow multiple mounts of the same device.
293 * Disallow mounting of a device that is currently in use
294 * Flush out any old buffers remaining from a previous use.
296 if ((error = vfs_mountedon(devvp)))
298 if (count_udev(devvp->v_udev) > 0)
300 if ((error = vinvalbuf(devvp, V_SAVE, td, 0, 0)))
303 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
304 error = VOP_OPEN(devvp, FREAD, FSCRED, NULL, td);
305 VOP_UNLOCK(devvp, 0, td);
309 if (dev->si_iosize_max != 0)
310 mp->mnt_iosize_max = dev->si_iosize_max;
311 if (mp->mnt_iosize_max > MAXPHYS)
312 mp->mnt_iosize_max = MAXPHYS;
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.
320 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
323 for (iso_blknum = 16 + argp->ssector;
324 iso_blknum < 100 + argp->ssector;
326 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
327 iso_bsize, &bp)) != 0)
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) {
339 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
344 pri = (struct iso_primary_descriptor *)vdp;
346 (struct iso_sierra_primary_descriptor *)vdp;
350 case ISO_VD_SUPPLEMENTARY:
354 sup = (struct iso_supplementary_descriptor *)vdp;
356 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
357 if (bcmp(sup->escape, "%/@", 3) == 0)
359 if (bcmp(sup->escape, "%/C", 3) == 0)
361 if (bcmp(sup->escape, "%/E", 3) == 0)
364 if ((isonum_711 (sup->flags) & 1) &&
365 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
394 isonum_723 (high_sierra?
395 pri_sierra->logical_block_size:
396 pri->logical_block_size);
398 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
399 || (logical_block_size & (logical_block_size - 1)) != 0) {
404 rootp = (struct iso_directory_record *)
406 pri_sierra->root_directory_record:
407 pri->root_directory_record);
409 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
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;
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.
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);
429 isomp->im_bmask = logical_block_size - 1;
430 isomp->im_bshift = ffs(logical_block_size) - 1;
432 pribp->b_flags |= B_AGE;
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;
443 isomp->im_devvp = devvp;
445 dev->si_mountpoint = mp;
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),
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);
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;
479 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
481 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
483 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
484 isomp->iso_ftype = ISO_FTYPE_9660;
487 log(LOG_INFO, "cd9660: RockRidge Extension\n");
488 isomp->iso_ftype = ISO_FTYPE_RRIP;
493 /* Decide whether to use the Joliet descriptor */
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;
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);
520 dev->si_mountpoint = NULL;
528 VOP_CLOSE(devvp, FREAD, td);
530 free((caddr_t)isomp, M_ISOFSMNT);
531 mp->mnt_data = (qaddr_t)0;
537 * unmount system call
540 cd9660_unmount(struct mount *mp, int mntflags, struct thread *td)
542 struct iso_mnt *isomp;
543 int error, flags = 0;
545 if (mntflags & MNT_FORCE)
552 if ((error = vflush(mp, 0, flags)))
555 isomp = VFSTOISOFS(mp);
557 isomp->im_devvp->v_rdev->si_mountpoint = NULL;
558 error = VOP_CLOSE(isomp->im_devvp, FREAD, td);
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;
567 * Return root of a filesystem
570 cd9660_root(struct mount *mp, struct vnode **vpp)
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);
578 * With RRIP we must use the `.' entry of the root directory.
579 * Simply tell vget, that it's a relocated directory.
581 return (cd9660_vget_internal(mp, ino, vpp,
582 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
586 * Get file system statistics.
589 cd9660_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
591 struct iso_mnt *isomp;
593 isomp = VFSTOISOFS(mp);
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;
604 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
610 * File handle to vnode
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
628 cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
630 struct ifid *ifhp = (struct ifid *)fhp;
636 printf("fhtovp: ino %d, start %ld\n",
637 ifhp->ifid_ino, ifhp->ifid_start);
640 if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
645 if (ip->inode.iso_mode == 0) {
655 cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
656 struct ucred **credanonp)
661 imp = VFSTOISOFS(mp);
664 * Get the export permission structure for this <mp, client> tuple.
666 np = vfs_export_lookup(mp, &imp->im_export, nam);
670 *exflagsp = np->netc_exflags;
671 *credanonp = &np->netc_anon;
676 cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
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
685 return (cd9660_vget_internal(mp, ino, vpp,
687 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
691 (struct iso_directory_record *)0));
695 cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp,
696 int relocated, struct iso_directory_record *isodir)
698 /*struct thread *td = curthread;*/
706 imp = VFSTOISOFS(mp);
709 if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
712 /* Allocate a new vnode/iso_node. */
713 error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0);
718 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
720 bzero((caddr_t)ip, sizeof(struct iso_node));
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.
729 if (cd9660_ihashins(ip) != 0) {
730 printf("debug: cd9660 ihashins collision, retrying\n");
732 free(ip, M_ISOFSNODE);
740 lbn = lblkno(imp, ino);
741 if (lbn >= imp->volume_space_size) {
743 printf("fhtovp: lbn exceed volume space %d\n", lbn);
747 off = blkoff(imp, ino);
748 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
750 printf("fhtovp: crosses block boundary %d\n",
751 off + ISO_DIRECTORY_RECORD_SIZE);
755 error = bread(imp->im_devvp,
756 lbn << (imp->im_bshift - DEV_BSHIFT),
757 imp->logical_block_size, &bp);
761 printf("fhtovp: bread error %d\n",error);
764 isodir = (struct iso_directory_record *)(bp->b_data + off);
766 if (off + isonum_711(isodir->length) >
767 imp->logical_block_size) {
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));
778 if (isonum_733(isodir->extent) +
779 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
782 printf("fhtovp: file start miss %d vs %d\n",
783 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
792 ip->i_devvp = imp->im_devvp;
797 * On relocated directories we must
798 * read the `.' entry out of a dir.
800 ip->iso_start = ino >> imp->im_bshift;
803 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
807 isodir = (struct iso_directory_record *)bp->b_data;
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;
815 * Setup time stamp, attribute
818 switch (imp->iso_ftype) {
819 default: /* ISO_FTYPE_9660 */
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,
829 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
830 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
836 cd9660_rrip_analyze(isodir, ip, imp);
844 * Initialize the associated vnode
846 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
848 vp->v_ops = &mp->mnt_vn_fifo_ops;
852 vp->v_ops = &mp->mnt_vn_spec_ops;
853 addaliasu(vp, ip->inode.iso_rdev);
859 if (ip->iso_extent == imp->root_extent)
863 * Return the locked and refd vp
870 * Vnode pointer to File handle
874 cd9660_vptofh(struct vnode *vp, struct fid *fhp)
876 struct iso_node *ip = VTOI(vp);
879 ifhp = (struct ifid *)fhp;
880 ifhp->ifid_len = sizeof(struct ifid);
882 ifhp->ifid_ino = ip->i_number;
883 ifhp->ifid_start = ip->iso_start;
886 printf("vptofh: ino %d, start %ld\n",
887 ifhp->ifid_ino,ifhp->ifid_start);