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
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
38 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/namei.h>
48 #include <sys/kernel.h>
49 #include <sys/vnode.h>
50 #include <sys/mount.h>
55 #include <sys/fcntl.h>
56 #include <sys/malloc.h>
58 #include <sys/syslog.h>
61 #include <isofs/cd9660/iso.h>
62 #include <isofs/cd9660/iso_rrip.h>
63 #include <isofs/cd9660/cd9660_node.h>
64 #include <isofs/cd9660/cd9660_mount.h>
66 MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
67 MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
69 static vfs_mount_t cd9660_mount;
70 static vfs_unmount_t cd9660_unmount;
71 static vfs_root_t cd9660_root;
72 static vfs_statfs_t cd9660_statfs;
73 static vfs_vget_t cd9660_vget;
74 static vfs_fhtovp_t cd9660_fhtovp;
75 static vfs_vptofh_t cd9660_vptofh;
77 static struct vfsops cd9660_vfsops = {
93 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
94 MODULE_VERSION(cd9660, 1);
98 * Called by vfs_mountroot when iso is going to be mounted as root.
101 static int iso_get_ssector(dev_t dev, struct thread *td);
102 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
103 struct thread *td, struct iso_args *argp);
106 * Try to find the start of the last data track on this CD-ROM. This
107 * is used to mount the last session of a multi-session CD. Bail out
108 * and return 0 if we fail, this is always a safe bet.
111 iso_get_ssector(dev, td)
115 struct ioc_toc_header h;
116 struct ioc_read_toc_single_entry t;
122 ioctlp = bd->d_ioctl;
126 if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
129 for (i = h.ending_track; i >= 0; i--) {
130 t.address_format = CD_LBA_FORMAT;
132 if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0)
134 if ((t.entry.control & 4) != 0)
135 /* found a data track */
142 return ntohl(t.entry.addr.lba);
145 static int iso_mountroot(struct mount *mp, struct thread *td);
148 iso_mountroot(mp, td)
152 struct iso_args args;
155 if ((error = bdevvp(rootdev, &rootvp))) {
156 printf("iso_mountroot: can't find rootvp\n");
159 args.flags = ISOFSMNT_ROOT;
161 vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
162 error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
163 VOP_UNLOCK(rootvp, 0, td);
167 args.ssector = iso_get_ssector(rootdev, td);
169 (void)VOP_CLOSE(rootvp, FREAD, NOCRED, td);
172 printf("iso_mountroot(): using session at block %d\n",
174 if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
177 (void)cd9660_statfs(mp, &mp->mnt_stat, td);
187 cd9660_mount(mp, path, data, ndp, td)
188 register struct mount *mp;
191 struct nameidata *ndp;
195 struct iso_args args;
199 struct iso_mnt *imp = 0;
201 if (path == NULL) /* We are doing the initial root mount */
202 return (iso_mountroot(mp, td));
203 if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
206 if ((mp->mnt_flag & MNT_RDONLY) == 0)
210 * If updating, check whether changing from read-only to
211 * read/write; if there is no device name, that's all we do.
213 if (mp->mnt_flag & MNT_UPDATE) {
214 imp = VFSTOISOFS(mp);
216 return (vfs_export(mp, &args.export));
219 * Not an update, or updating the name: look up the name
220 * and verify that it refers to a sensible block device.
222 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
223 if ((error = namei(ndp)))
225 NDFREE(ndp, NDF_ONLY_PNBUF);
228 if (!vn_isdisk(devvp, &error)) {
234 * Verify that user has necessary permissions on the device,
235 * or has superuser abilities
238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
239 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
246 VOP_UNLOCK(devvp, 0, td);
248 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
249 error = iso_mountfs(devvp, mp, td, &args);
251 if (devvp != imp->im_devvp)
252 error = EINVAL; /* needs translation */
260 imp = VFSTOISOFS(mp);
261 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
263 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
264 (void) cd9660_statfs(mp, &mp->mnt_stat, td);
269 * Common code for mount and mountroot
272 iso_mountfs(devvp, mp, td, argp)
273 register struct vnode *devvp;
276 struct iso_args *argp;
278 register struct iso_mnt *isomp = (struct iso_mnt *)0;
279 struct buf *bp = NULL;
280 struct buf *pribp = NULL, *supbp = NULL;
281 dev_t dev = devvp->v_rdev;
288 struct iso_volume_descriptor *vdp = 0;
289 struct iso_primary_descriptor *pri = NULL;
290 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
291 struct iso_supplementary_descriptor *sup = NULL;
292 struct iso_directory_record *rootp;
293 int logical_block_size;
295 if (!(mp->mnt_flag & MNT_RDONLY))
299 * Disallow multiple mounts of the same device.
300 * Disallow mounting of a device that is currently in use
301 * (except for root, which might share swap device for miniroot).
302 * Flush out any old buffers remaining from a previous use.
304 if ((error = vfs_mountedon(devvp)))
306 if (vcount(devvp) > 1 && devvp != rootvp)
308 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0)))
311 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
312 error = VOP_OPEN(devvp, FREAD, FSCRED, td);
313 VOP_UNLOCK(devvp, 0, td);
316 if (devvp->v_rdev->si_iosize_max != 0)
317 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
318 if (mp->mnt_iosize_max > MAXPHYS)
319 mp->mnt_iosize_max = MAXPHYS;
323 /* This is the "logical sector size". The standard says this
324 * should be 2048 or the physical sector size on the device,
325 * whichever is greater. For now, we'll just use a constant.
327 iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
330 for (iso_blknum = 16 + argp->ssector;
331 iso_blknum < 100 + argp->ssector;
333 if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
334 iso_bsize, NOCRED, &bp)) != 0)
337 vdp = (struct iso_volume_descriptor *)bp->b_data;
338 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
339 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
340 sizeof vdp->id) != 0) {
346 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
351 pri = (struct iso_primary_descriptor *)vdp;
353 (struct iso_sierra_primary_descriptor *)vdp;
357 case ISO_VD_SUPPLEMENTARY:
361 sup = (struct iso_supplementary_descriptor *)vdp;
363 if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
364 if (bcmp(sup->escape, "%/@", 3) == 0)
366 if (bcmp(sup->escape, "%/C", 3) == 0)
368 if (bcmp(sup->escape, "%/E", 3) == 0)
371 if ((isonum_711 (sup->flags) & 1) &&
372 (argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
401 isonum_723 (high_sierra?
402 pri_sierra->logical_block_size:
403 pri->logical_block_size);
405 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
406 || (logical_block_size & (logical_block_size - 1)) != 0) {
411 rootp = (struct iso_directory_record *)
413 pri_sierra->root_directory_record:
414 pri->root_directory_record);
416 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
417 isomp->logical_block_size = logical_block_size;
418 isomp->volume_space_size =
419 isonum_733 (high_sierra?
420 pri_sierra->volume_space_size:
421 pri->volume_space_size);
422 isomp->joliet_level = 0;
424 * Since an ISO9660 multi-session CD can also access previous
425 * sessions, we have to include them into the space consider-
426 * ations. This doesn't yield a very accurate number since
427 * parts of the old sessions might be inaccessible now, but we
428 * can't do much better. This is also important for the NFS
429 * filehandle validation.
431 isomp->volume_space_size += argp->ssector;
432 bcopy (rootp, isomp->root, sizeof isomp->root);
433 isomp->root_extent = isonum_733 (rootp->extent);
434 isomp->root_size = isonum_733 (rootp->size);
436 isomp->im_bmask = logical_block_size - 1;
437 isomp->im_bshift = ffs(logical_block_size) - 1;
439 pribp->b_flags |= B_AGE;
443 mp->mnt_data = (qaddr_t)isomp;
444 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
445 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
446 mp->mnt_maxsymlinklen = 0;
447 mp->mnt_flag |= MNT_LOCAL;
448 isomp->im_mountp = mp;
450 isomp->im_devvp = devvp;
452 devvp->v_rdev->si_mountpoint = mp;
454 /* Check the Rock Ridge Extention support */
455 if (!(argp->flags & ISOFSMNT_NORRIP)) {
456 if ((error = bread(isomp->im_devvp,
457 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
458 (isomp->im_bshift - DEV_BSHIFT),
459 isomp->logical_block_size, NOCRED, &bp)) != 0)
462 rootp = (struct iso_directory_record *)bp->b_data;
464 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
465 argp->flags |= ISOFSMNT_NORRIP;
467 argp->flags &= ~ISOFSMNT_GENS;
471 * The contents are valid,
472 * but they will get reread as part of another vnode, so...
474 bp->b_flags |= B_AGE;
478 isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
479 ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
482 /* this effectively ignores all the mount flags */
483 log(LOG_INFO, "cd9660: High Sierra Format\n");
484 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
486 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
488 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
490 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
491 isomp->iso_ftype = ISO_FTYPE_9660;
494 log(LOG_INFO, "cd9660: RockRidge Extension\n");
495 isomp->iso_ftype = ISO_FTYPE_RRIP;
499 /* Decide whether to use the Joliet descriptor */
501 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
502 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
503 rootp = (struct iso_directory_record *)
504 sup->root_directory_record;
505 bcopy (rootp, isomp->root, sizeof isomp->root);
506 isomp->root_extent = isonum_733 (rootp->extent);
507 isomp->root_size = isonum_733 (rootp->size);
508 isomp->joliet_level = joliet_level;
509 supbp->b_flags |= B_AGE;
519 devvp->v_rdev->si_mountpoint = NULL;
527 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td);
529 free((caddr_t)isomp, M_ISOFSMNT);
530 mp->mnt_data = (qaddr_t)0;
536 * unmount system call
539 cd9660_unmount(mp, mntflags, td)
544 register 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, NOCRED, 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
576 struct iso_mnt *imp = VFSTOISOFS(mp);
577 struct iso_directory_record *dp =
578 (struct iso_directory_record *)imp->root;
579 ino_t ino = isodirino(dp, imp);
582 * With RRIP we must use the `.' entry of the root directory.
583 * Simply tell vget, that it's a relocated directory.
585 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp,
586 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
590 * Get filesystem statistics.
593 cd9660_statfs(mp, sbp, td)
595 register struct statfs *sbp;
598 register struct iso_mnt *isomp;
600 isomp = VFSTOISOFS(mp);
602 sbp->f_bsize = isomp->logical_block_size;
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_files = 0; /* total files */
608 sbp->f_ffree = 0; /* free file nodes */
609 if (sbp != &mp->mnt_stat) {
610 sbp->f_type = mp->mnt_vfc->vfc_typenum;
611 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
612 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
618 * File handle to vnode
620 * Have to be really careful about stale file handles:
621 * - check that the inode number is in range
622 * - call iget() to get the locked inode
623 * - check for an unallocated inode (i_mode == 0)
624 * - check that the generation number matches
636 cd9660_fhtovp(mp, fhp, vpp)
637 register struct mount *mp;
641 struct ifid *ifhp = (struct ifid *)fhp;
642 register struct iso_node *ip;
647 printf("fhtovp: ino %d, start %ld\n",
648 ifhp->ifid_ino, ifhp->ifid_start);
651 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
656 if (ip->inode.iso_mode == 0) {
666 cd9660_vget(mp, ino, flags, vpp)
675 * It would be nice if we didn't always set the `relocated' flag
676 * and force the extra read, but I don't want to think about fixing
679 return (cd9660_vget_internal(mp, ino, flags, vpp,
681 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
685 (struct iso_directory_record *)0));
689 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
695 struct iso_directory_record *isodir;
704 imp = VFSTOISOFS(mp);
706 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0)
711 /* Allocate a new vnode/iso_node. */
712 if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) {
716 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
724 * Check to be sure that it did not show up. We have to put it
725 * on the hash chain as the cleanup from vput expects to find
728 if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 ||
736 * Put it onto its hash chain and lock it so that other requests for
737 * this inode will block if they arrive while we are sleeping waiting
738 * for old data structures to be purged or for the contents of the
739 * disk portion of this inode to be read.
746 lbn = lblkno(imp, ino);
747 if (lbn >= imp->volume_space_size) {
749 printf("fhtovp: lbn exceed volume space %d\n", lbn);
753 off = blkoff(imp, ino);
754 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
756 printf("fhtovp: crosses block boundary %d\n",
757 off + ISO_DIRECTORY_RECORD_SIZE);
761 error = bread(imp->im_devvp,
762 lbn << (imp->im_bshift - DEV_BSHIFT),
763 imp->logical_block_size, NOCRED, &bp);
767 printf("fhtovp: bread error %d\n",error);
770 isodir = (struct iso_directory_record *)(bp->b_data + off);
772 if (off + isonum_711(isodir->length) >
773 imp->logical_block_size) {
777 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
778 off +isonum_711(isodir->length), off,
779 isonum_711(isodir->length));
784 if (isonum_733(isodir->extent) +
785 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
788 printf("fhtovp: file start miss %d vs %d\n",
789 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
798 ip->i_devvp = imp->im_devvp;
803 * On relocated directories we must
804 * read the `.' entry out of a dir.
806 ip->iso_start = ino >> imp->im_bshift;
809 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
813 isodir = (struct iso_directory_record *)bp->b_data;
816 ip->iso_extent = isonum_733(isodir->extent);
817 ip->i_size = isonum_733(isodir->size);
818 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
821 * Setup time stamp, attribute
824 switch (imp->iso_ftype) {
825 default: /* ISO_FTYPE_9660 */
829 if ((imp->im_flags & ISOFSMNT_EXTATT)
830 && (off = isonum_711(isodir->ext_attr_length)))
831 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
835 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
836 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
842 cd9660_rrip_analyze(isodir, ip, imp);
850 * Initialize the associated vnode
852 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
854 vp->v_op = cd9660_fifoop_p;
858 vp->v_op = cd9660_specop_p;
859 vp = addaliasu(vp, ip->inode.iso_rdev);
866 if (ip->iso_extent == imp->root_extent)
867 vp->v_vflag |= VV_ROOT;
870 * XXX need generation number?
878 * Vnode pointer to File handle
882 cd9660_vptofh(vp, fhp)
886 register struct iso_node *ip = VTOI(vp);
887 register struct ifid *ifhp;
889 ifhp = (struct ifid *)fhp;
890 ifhp->ifid_len = sizeof(struct ifid);
892 ifhp->ifid_ino = ip->i_number;
893 ifhp->ifid_start = ip->iso_start;
896 printf("vptofh: ino %d, start %ld\n",
897 ifhp->ifid_ino,ifhp->ifid_start);