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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/namei.h>
44 #include <sys/kernel.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
51 #include <sys/fcntl.h>
52 #include <sys/malloc.h>
54 #include <sys/syslog.h>
55 #include <sys/iconv.h>
57 #include <isofs/cd9660/iso.h>
58 #include <isofs/cd9660/iso_rrip.h>
59 #include <isofs/cd9660/cd9660_node.h>
60 #include <isofs/cd9660/cd9660_mount.h>
62 #include <geom/geom.h>
63 #include <geom/geom_vfs.h>
65 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure");
66 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part");
68 struct iconv_functions *cd9660_iconv = NULL;
70 static vfs_mount_t cd9660_mount;
71 static vfs_cmount_t cd9660_cmount;
72 static vfs_unmount_t cd9660_unmount;
73 static vfs_root_t cd9660_root;
74 static vfs_statfs_t cd9660_statfs;
75 static vfs_vget_t cd9660_vget;
76 static vfs_fhtovp_t cd9660_fhtovp;
77 static vfs_vptofh_t cd9660_vptofh;
79 static struct vfsops cd9660_vfsops = {
80 .vfs_fhtovp = cd9660_fhtovp,
81 .vfs_mount = cd9660_mount,
82 .vfs_cmount = cd9660_cmount,
83 .vfs_root = cd9660_root,
84 .vfs_statfs = cd9660_statfs,
85 .vfs_unmount = cd9660_unmount,
86 .vfs_vget = cd9660_vget,
87 .vfs_vptofh = cd9660_vptofh,
89 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
90 MODULE_VERSION(cd9660, 1);
92 static int iso_mountfs(struct vnode *devvp, struct mount *mp,
100 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
102 struct iso_args args;
105 error = copyin(data, &args, sizeof args);
109 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
110 ma = mount_arg(ma, "export", &args.export, sizeof args.export);
111 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64);
112 ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
113 ma = mount_argf(ma, "ssector", "%u", args.ssector);
114 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip");
115 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens");
116 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt");
117 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet");
119 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet");
120 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv");
122 error = kernel_mount(ma, flags);
128 cd9660_mount(struct mount *mp, struct thread *td)
131 struct export_args *export;
135 struct nameidata ndp;
136 struct iso_mnt *imp = 0;
139 * Unconditionally mount as read-only.
141 mp->mnt_flag |= MNT_RDONLY;
143 fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
147 imp = VFSTOISOFS(mp);
149 * If updating, check whether changing from read-only to
150 * read/write; if there is no device name, that's all we do.
152 if (mp->mnt_flag & MNT_UPDATE) {
153 error = vfs_getopt(mp->mnt_optnew,
154 "export", (void **)&export, &len);
155 if (error == 0 && len == sizeof *export && export->ex_flags)
156 return (vfs_export(mp, export));
159 * Not an update, or updating the name: look up the name
160 * and verify that it refers to a sensible block device.
162 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td);
163 if ((error = namei(&ndp)))
165 NDFREE(&ndp, NDF_ONLY_PNBUF);
168 if (!vn_isdisk(devvp, &error)) {
174 * Verify that user has necessary permissions on the device,
175 * or has superuser abilities
178 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
179 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
186 VOP_UNLOCK(devvp, 0, td);
188 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
189 error = iso_mountfs(devvp, mp, td);
191 if (devvp != imp->im_devvp)
192 error = EINVAL; /* needs translation */
200 vfs_mountedfrom(mp, fspec);
205 * Common code for mount and mountroot
208 iso_mountfs(devvp, mp, td)
213 struct iso_mnt *isomp = (struct iso_mnt *)0;
214 struct buf *bp = NULL;
215 struct buf *pribp = NULL, *supbp = NULL;
216 struct cdev *dev = devvp->v_rdev;
222 struct iso_volume_descriptor *vdp = 0;
223 struct iso_primary_descriptor *pri = NULL;
224 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
225 struct iso_supplementary_descriptor *sup = NULL;
226 struct iso_directory_record *rootp;
227 int logical_block_size, ssector;
228 struct g_consumer *cp;
230 char *cs_local, *cs_disk;
232 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
235 error = g_vfs_open(devvp, &cp, "cd9660", 0);
238 VOP_UNLOCK(devvp, 0, td);
241 if (devvp->v_rdev->si_iosize_max != 0)
242 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
243 if (mp->mnt_iosize_max > MAXPHYS)
244 mp->mnt_iosize_max = MAXPHYS;
246 bo = &devvp->v_bufobj;
248 bo->bo_ops = g_vfs_bufops;
250 /* This is the "logical sector size". The standard says this
251 * should be 2048 or the physical sector size on the device,
252 * whichever is greater.
254 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) {
263 iso_bsize = cp->provider->sectorsize;
266 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector))
268 for (iso_blknum = 16 + ssector;
269 iso_blknum < 100 + ssector;
271 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE),
272 iso_bsize, NOCRED, &bp)) != 0)
275 vdp = (struct iso_volume_descriptor *)bp->b_data;
276 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
277 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
278 sizeof vdp->id) != 0) {
284 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
289 pri = (struct iso_primary_descriptor *)vdp;
291 (struct iso_sierra_primary_descriptor *)vdp;
295 case ISO_VD_SUPPLEMENTARY:
299 sup = (struct iso_supplementary_descriptor *)vdp;
301 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) {
302 if (bcmp(sup->escape, "%/@", 3) == 0)
304 if (bcmp(sup->escape, "%/C", 3) == 0)
306 if (bcmp(sup->escape, "%/E", 3) == 0)
309 if ((isonum_711 (sup->flags) & 1) &&
310 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0))
339 isonum_723 (high_sierra?
340 pri_sierra->logical_block_size:
341 pri->logical_block_size);
343 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
344 || (logical_block_size & (logical_block_size - 1)) != 0) {
349 rootp = (struct iso_directory_record *)
351 pri_sierra->root_directory_record:
352 pri->root_directory_record);
354 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
357 isomp->logical_block_size = logical_block_size;
358 isomp->volume_space_size =
359 isonum_733 (high_sierra?
360 pri_sierra->volume_space_size:
361 pri->volume_space_size);
362 isomp->joliet_level = 0;
364 * Since an ISO9660 multi-session CD can also access previous
365 * sessions, we have to include them into the space consider-
366 * ations. This doesn't yield a very accurate number since
367 * parts of the old sessions might be inaccessible now, but we
368 * can't do much better. This is also important for the NFS
369 * filehandle validation.
371 isomp->volume_space_size += ssector;
372 bcopy (rootp, isomp->root, sizeof isomp->root);
373 isomp->root_extent = isonum_733 (rootp->extent);
374 isomp->root_size = isonum_733 (rootp->size);
376 isomp->im_bmask = logical_block_size - 1;
377 isomp->im_bshift = ffs(logical_block_size) - 1;
379 pribp->b_flags |= B_AGE;
383 mp->mnt_data = (qaddr_t)isomp;
384 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
385 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
386 mp->mnt_maxsymlinklen = 0;
387 mp->mnt_flag |= MNT_LOCAL;
388 isomp->im_mountp = mp;
390 isomp->im_devvp = devvp;
392 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP);
393 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS);
394 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT);
395 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET);
396 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV);
398 /* Check the Rock Ridge Extension support */
399 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) {
400 if ((error = bread(isomp->im_devvp,
401 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
402 (isomp->im_bshift - DEV_BSHIFT),
403 isomp->logical_block_size, NOCRED, &bp)) != 0)
406 rootp = (struct iso_directory_record *)bp->b_data;
408 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
409 isomp->im_flags |= ISOFSMNT_NORRIP;
411 isomp->im_flags &= ~ISOFSMNT_GENS;
415 * The contents are valid,
416 * but they will get reread as part of another vnode, so...
418 bp->b_flags |= B_AGE;
423 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
424 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
427 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error);
430 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
431 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
433 isomp->im_d2l = NULL;
434 isomp->im_l2d = NULL;
438 /* this effectively ignores all the mount flags */
440 log(LOG_INFO, "cd9660: High Sierra Format\n");
441 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
443 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
445 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
447 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
448 isomp->iso_ftype = ISO_FTYPE_9660;
452 log(LOG_INFO, "cd9660: RockRidge Extension\n");
453 isomp->iso_ftype = ISO_FTYPE_RRIP;
457 /* Decide whether to use the Joliet descriptor */
459 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
461 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n",
463 rootp = (struct iso_directory_record *)
464 sup->root_directory_record;
465 bcopy (rootp, isomp->root, sizeof isomp->root);
466 isomp->root_extent = isonum_733 (rootp->extent);
467 isomp->root_size = isonum_733 (rootp->size);
468 isomp->joliet_level = joliet_level;
469 supbp->b_flags |= B_AGE;
493 free((caddr_t)isomp, M_ISOFSMNT);
494 mp->mnt_data = (qaddr_t)0;
500 * unmount system call
503 cd9660_unmount(mp, mntflags, td)
508 struct iso_mnt *isomp;
509 int error, flags = 0;
511 if (mntflags & MNT_FORCE)
518 if ((error = vflush(mp, 0, flags, td)))
521 isomp = VFSTOISOFS(mp);
523 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
525 cd9660_iconv->close(isomp->im_d2l);
527 cd9660_iconv->close(isomp->im_l2d);
531 g_vfs_close(isomp->im_cp, td);
534 vrele(isomp->im_devvp);
535 free((caddr_t)isomp, M_ISOFSMNT);
536 mp->mnt_data = (qaddr_t)0;
537 mp->mnt_flag &= ~MNT_LOCAL;
542 * Return root of a filesystem
545 cd9660_root(mp, flags, vpp, td)
551 struct iso_mnt *imp = VFSTOISOFS(mp);
552 struct iso_directory_record *dp =
553 (struct iso_directory_record *)imp->root;
554 ino_t ino = isodirino(dp, imp);
557 * With RRIP we must use the `.' entry of the root directory.
558 * Simply tell vget, that it's a relocated directory.
560 return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp,
561 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
565 * Get filesystem statistics.
568 cd9660_statfs(mp, sbp, td)
573 struct iso_mnt *isomp;
575 isomp = VFSTOISOFS(mp);
577 sbp->f_bsize = isomp->logical_block_size;
578 sbp->f_iosize = sbp->f_bsize; /* XXX */
579 sbp->f_blocks = isomp->volume_space_size;
580 sbp->f_bfree = 0; /* total free blocks */
581 sbp->f_bavail = 0; /* blocks free for non superuser */
582 sbp->f_files = 0; /* total files */
583 sbp->f_ffree = 0; /* free file nodes */
588 * File handle to vnode
590 * Have to be really careful about stale file handles:
591 * - check that the inode number is in range
592 * - call iget() to get the locked inode
593 * - check for an unallocated inode (i_mode == 0)
594 * - check that the generation number matches
606 cd9660_fhtovp(mp, fhp, vpp)
611 struct ifid *ifhp = (struct ifid *)fhp;
617 printf("fhtovp: ino %d, start %ld\n",
618 ifhp->ifid_ino, ifhp->ifid_start);
621 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
626 if (ip->inode.iso_mode == 0) {
632 vnode_create_vobject(*vpp, ip->i_size, curthread);
637 cd9660_vget(mp, ino, flags, vpp)
646 * It would be nice if we didn't always set the `relocated' flag
647 * and force the extra read, but I don't want to think about fixing
650 return (cd9660_vget_internal(mp, ino, flags, vpp,
652 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
656 (struct iso_directory_record *)0));
660 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
666 struct iso_directory_record *isodir;
675 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
676 if (error || *vpp != NULL)
679 imp = VFSTOISOFS(mp);
682 /* Allocate a new vnode/iso_node. */
683 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) {
687 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
693 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
694 if (error || *vpp != NULL)
700 lbn = lblkno(imp, ino);
701 if (lbn >= imp->volume_space_size) {
703 printf("fhtovp: lbn exceed volume space %d\n", lbn);
707 off = blkoff(imp, ino);
708 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
710 printf("fhtovp: crosses block boundary %d\n",
711 off + ISO_DIRECTORY_RECORD_SIZE);
715 error = bread(imp->im_devvp,
716 lbn << (imp->im_bshift - DEV_BSHIFT),
717 imp->logical_block_size, NOCRED, &bp);
721 printf("fhtovp: bread error %d\n",error);
724 isodir = (struct iso_directory_record *)(bp->b_data + off);
726 if (off + isonum_711(isodir->length) >
727 imp->logical_block_size) {
731 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
732 off +isonum_711(isodir->length), off,
733 isonum_711(isodir->length));
738 if (isonum_733(isodir->extent) +
739 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
742 printf("fhtovp: file start miss %d vs %d\n",
743 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
756 * On relocated directories we must
757 * read the `.' entry out of a dir.
759 ip->iso_start = ino >> imp->im_bshift;
762 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
766 isodir = (struct iso_directory_record *)bp->b_data;
769 ip->iso_extent = isonum_733(isodir->extent);
770 ip->i_size = isonum_733(isodir->size);
771 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
774 * Setup time stamp, attribute
777 switch (imp->iso_ftype) {
778 default: /* ISO_FTYPE_9660 */
782 if ((imp->im_flags & ISOFSMNT_EXTATT)
783 && (off = isonum_711(isodir->ext_attr_length)))
784 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
788 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
789 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
795 cd9660_rrip_analyze(isodir, ip, imp);
803 * Initialize the associated vnode
805 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
807 vp->v_op = &cd9660_fifoops;
813 if (ip->iso_extent == imp->root_extent)
814 vp->v_vflag |= VV_ROOT;
817 * XXX need generation number?
825 * Vnode pointer to File handle
829 cd9660_vptofh(vp, fhp)
833 struct iso_node *ip = VTOI(vp);
836 ifhp = (struct ifid *)fhp;
837 ifhp->ifid_len = sizeof(struct ifid);
839 ifhp->ifid_ino = ip->i_number;
840 ifhp->ifid_start = ip->iso_start;
843 printf("vptofh: ino %d, start %ld\n",
844 ifhp->ifid_ino,ifhp->ifid_start);