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. 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>
45 #include <sys/kernel.h>
46 #include <sys/vnode.h>
47 #include <sys/mount.h>
52 #include <sys/fcntl.h>
53 #include <sys/malloc.h>
55 #include <sys/syslog.h>
56 #include <sys/iconv.h>
58 #include <fs/cd9660/iso.h>
59 #include <fs/cd9660/iso_rrip.h>
60 #include <fs/cd9660/cd9660_node.h>
61 #include <fs/cd9660/cd9660_mount.h>
63 #include <geom/geom.h>
64 #include <geom/geom_vfs.h>
66 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure");
67 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part");
69 struct iconv_functions *cd9660_iconv = NULL;
71 static vfs_mount_t cd9660_mount;
72 static vfs_cmount_t cd9660_cmount;
73 static vfs_unmount_t cd9660_unmount;
74 static vfs_root_t cd9660_root;
75 static vfs_statfs_t cd9660_statfs;
76 static vfs_vget_t cd9660_vget;
77 static vfs_fhtovp_t cd9660_fhtovp;
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,
88 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
89 MODULE_VERSION(cd9660, 1);
91 static int cd9660_vfs_hash_cmp(struct vnode *vp, void *pino);
92 static int iso_mountfs(struct vnode *devvp, struct mount *mp);
99 cd9660_cmount(struct mntarg *ma, void *data, uint64_t flags)
101 struct iso_args args;
102 struct export_args exp;
105 error = copyin(data, &args, sizeof args);
108 vfs_oexport_conv(&args.export, &exp);
110 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
111 ma = mount_arg(ma, "export", &exp, sizeof(exp));
112 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64);
113 ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
114 ma = mount_argf(ma, "ssector", "%u", args.ssector);
115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip");
116 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens");
117 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt");
118 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet");
120 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet");
121 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv");
123 error = kernel_mount(ma, flags);
129 cd9660_mount(struct mount *mp)
136 struct nameidata ndp;
137 struct iso_mnt *imp = NULL;
142 * Unconditionally mount as read-only.
145 mp->mnt_flag |= MNT_RDONLY;
148 fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
152 imp = VFSTOISOFS(mp);
154 if (mp->mnt_flag & MNT_UPDATE) {
155 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
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 | LOCKLEAF, 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 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
180 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
186 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
187 error = iso_mountfs(devvp, mp);
191 if (devvp != imp->im_devvp)
192 error = EINVAL; /* needs translation */
197 vfs_mountedfrom(mp, fspec);
202 * Common code for mount and mountroot
205 iso_mountfs(devvp, mp)
209 struct iso_mnt *isomp = NULL;
210 struct buf *bp = NULL;
211 struct buf *pribp = NULL, *supbp = NULL;
218 struct iso_volume_descriptor *vdp = NULL;
219 struct iso_primary_descriptor *pri = NULL;
220 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
221 struct iso_supplementary_descriptor *sup = NULL;
222 struct iso_directory_record *rootp;
223 int logical_block_size, ssector;
224 struct g_consumer *cp;
226 char *cs_local, *cs_disk;
231 error = g_vfs_open(devvp, &cp, "cd9660", 0);
233 VOP_UNLOCK(devvp, 0);
236 if (devvp->v_rdev->si_iosize_max != 0)
237 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
238 if (mp->mnt_iosize_max > MAXPHYS)
239 mp->mnt_iosize_max = MAXPHYS;
241 bo = &devvp->v_bufobj;
243 /* This is the "logical sector size". The standard says this
244 * should be 2048 or the physical sector size on the device,
245 * whichever is greater.
247 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) {
252 iso_bsize = cp->provider->sectorsize;
255 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector))
257 for (iso_blknum = 16 + ssector;
258 iso_blknum < 100 + ssector;
260 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE),
261 iso_bsize, NOCRED, &bp)) != 0)
264 vdp = (struct iso_volume_descriptor *)bp->b_data;
265 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
266 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
267 sizeof vdp->id_sierra) != 0) {
273 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
278 pri = (struct iso_primary_descriptor *)vdp;
280 (struct iso_sierra_primary_descriptor *)vdp;
284 case ISO_VD_SUPPLEMENTARY:
288 sup = (struct iso_supplementary_descriptor *)vdp;
290 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) {
291 if (bcmp(sup->escape, "%/@", 3) == 0)
293 if (bcmp(sup->escape, "%/C", 3) == 0)
295 if (bcmp(sup->escape, "%/E", 3) == 0)
298 if ((isonum_711 (sup->flags) & 1) &&
299 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0))
328 isonum_723 (high_sierra?
329 pri_sierra->logical_block_size:
330 pri->logical_block_size);
332 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
333 || (logical_block_size & (logical_block_size - 1)) != 0) {
338 rootp = (struct iso_directory_record *)
340 pri_sierra->root_directory_record:
341 pri->root_directory_record);
343 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
346 isomp->logical_block_size = logical_block_size;
347 isomp->volume_space_size =
348 isonum_733 (high_sierra?
349 pri_sierra->volume_space_size:
350 pri->volume_space_size);
351 isomp->joliet_level = 0;
353 * Since an ISO9660 multi-session CD can also access previous
354 * sessions, we have to include them into the space consider-
355 * ations. This doesn't yield a very accurate number since
356 * parts of the old sessions might be inaccessible now, but we
357 * can't do much better. This is also important for the NFS
358 * filehandle validation.
360 isomp->volume_space_size += ssector;
361 bcopy (rootp, isomp->root, sizeof isomp->root);
362 isomp->root_extent = isonum_733 (rootp->extent);
363 isomp->root_size = isonum_733 (rootp->size);
365 isomp->im_bmask = logical_block_size - 1;
366 isomp->im_bshift = ffs(logical_block_size) - 1;
368 pribp->b_flags |= B_AGE;
375 mp->mnt_data = isomp;
376 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
377 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
378 mp->mnt_maxsymlinklen = 0;
380 mp->mnt_flag |= MNT_LOCAL;
381 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED;
383 isomp->im_mountp = mp;
385 isomp->im_devvp = devvp;
387 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP);
388 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS);
389 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT);
390 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET);
391 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV);
393 /* Check the Rock Ridge Extension support */
394 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) {
395 if ((error = bread(isomp->im_devvp, (isomp->root_extent +
396 isonum_711(((struct iso_directory_record *)isomp->root)->
397 ext_attr_length)) << (isomp->im_bshift - DEV_BSHIFT),
398 isomp->logical_block_size, NOCRED, &bp)) != 0)
401 rootp = (struct iso_directory_record *)bp->b_data;
403 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
404 isomp->im_flags |= ISOFSMNT_NORRIP;
406 isomp->im_flags &= ~ISOFSMNT_GENS;
410 * The contents are valid,
411 * but they will get reread as part of another vnode, so...
413 bp->b_flags |= B_AGE;
419 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
420 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
423 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error);
426 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
427 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
429 isomp->im_d2l = NULL;
430 isomp->im_l2d = NULL;
434 /* this effectively ignores all the mount flags */
436 log(LOG_INFO, "cd9660: High Sierra Format\n");
437 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
439 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
441 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
443 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
444 isomp->iso_ftype = ISO_FTYPE_9660;
448 log(LOG_INFO, "cd9660: RockRidge Extension\n");
449 isomp->iso_ftype = ISO_FTYPE_RRIP;
453 /* Decide whether to use the Joliet descriptor */
455 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
457 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n",
459 rootp = (struct iso_directory_record *)
460 sup->root_directory_record;
461 bcopy (rootp, isomp->root, sizeof isomp->root);
462 isomp->root_extent = isonum_733 (rootp->extent);
463 isomp->root_size = isonum_733 (rootp->size);
464 isomp->joliet_level = joliet_level;
465 supbp->b_flags |= B_AGE;
488 free(isomp, M_ISOFSMNT);
496 * unmount system call
499 cd9660_unmount(mp, mntflags)
503 struct iso_mnt *isomp;
504 int error, flags = 0;
506 if (mntflags & MNT_FORCE)
508 if ((error = vflush(mp, 0, flags, curthread)))
511 isomp = VFSTOISOFS(mp);
513 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
515 cd9660_iconv->close(isomp->im_d2l);
517 cd9660_iconv->close(isomp->im_l2d);
520 g_vfs_close(isomp->im_cp);
522 vrele(isomp->im_devvp);
523 dev_rel(isomp->im_dev);
524 free(isomp, M_ISOFSMNT);
527 mp->mnt_flag &= ~MNT_LOCAL;
533 * Return root of a filesystem
536 cd9660_root(mp, flags, vpp)
541 struct iso_mnt *imp = VFSTOISOFS(mp);
542 struct iso_directory_record *dp =
543 (struct iso_directory_record *)imp->root;
544 cd_ino_t ino = isodirino(dp, imp);
547 * With RRIP we must use the `.' entry of the root directory.
548 * Simply tell vget, that it's a relocated directory.
550 return (cd9660_vget_internal(mp, ino, flags, vpp,
551 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
555 * Get filesystem statistics.
558 cd9660_statfs(mp, sbp)
562 struct iso_mnt *isomp;
564 isomp = VFSTOISOFS(mp);
566 sbp->f_bsize = isomp->logical_block_size;
567 sbp->f_iosize = sbp->f_bsize; /* XXX */
568 sbp->f_blocks = isomp->volume_space_size;
569 sbp->f_bfree = 0; /* total free blocks */
570 sbp->f_bavail = 0; /* blocks free for non superuser */
571 sbp->f_files = 0; /* total files */
572 sbp->f_ffree = 0; /* free file nodes */
577 * File handle to vnode
579 * Have to be really careful about stale file handles:
580 * - check that the inode number is in range
581 * - call iget() to get the locked inode
582 * - check for an unallocated inode (i_mode == 0)
583 * - check that the generation number matches
588 cd9660_fhtovp(mp, fhp, flags, vpp)
599 memcpy(&ifh, fhp, sizeof(ifh));
602 printf("fhtovp: ino %d, start %ld\n",
603 ifh.ifid_ino, ifh.ifid_start);
606 if ((error = VFS_VGET(mp, ifh.ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
611 if (ip->inode.iso_mode == 0) {
617 vnode_create_vobject(*vpp, ip->i_size, curthread);
622 * Conform to standard VFS interface; can't vget arbitrary inodes beyond 4GB
623 * into media with current inode scheme and 32-bit ino_t. This shouldn't be
624 * needed for anything other than nfsd, and who exports a mounted DVD over NFS?
627 cd9660_vget(mp, ino, flags, vpp)
636 * It would be nice if we didn't always set the `relocated' flag
637 * and force the extra read, but I don't want to think about fixing
640 return (cd9660_vget_internal(mp, ino, flags, vpp,
642 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
646 (struct iso_directory_record *)0));
649 /* Use special comparator for full 64-bit ino comparison. */
651 cd9660_vfs_hash_cmp(vp, pino)
659 ino = *(cd_ino_t *)pino;
660 return (ip->i_number != ino);
664 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
670 struct iso_directory_record *isodir;
681 error = vfs_hash_get(mp, ino, flags, td, vpp, cd9660_vfs_hash_cmp,
683 if (error || *vpp != NULL)
687 * We must promote to an exclusive lock for vnode creation. This
688 * can happen if lookup is passed LOCKSHARED.
690 if ((flags & LK_TYPE_MASK) == LK_SHARED) {
691 flags &= ~LK_TYPE_MASK;
692 flags |= LK_EXCLUSIVE;
696 * We do not lock vnode creation as it is believed to be too
697 * expensive for such rare case as simultaneous creation of vnode
698 * for same ino by different processes. We just allow them to race
699 * and check later to decide who wins. Let the race begin!
702 imp = VFSTOISOFS(mp);
705 /* Allocate a new vnode/iso_node. */
706 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) {
710 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE,
716 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
717 error = insmntque(vp, mp);
719 free(ip, M_ISOFSNODE);
723 error = vfs_hash_insert(vp, ino, flags, td, vpp, cd9660_vfs_hash_cmp,
725 if (error || *vpp != NULL)
728 if (isodir == NULL) {
731 lbn = lblkno(imp, ino);
732 if (lbn >= imp->volume_space_size) {
734 printf("fhtovp: lbn exceed volume space %d\n", lbn);
738 off = blkoff(imp, ino);
739 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
741 printf("fhtovp: crosses block boundary %d\n",
742 off + ISO_DIRECTORY_RECORD_SIZE);
746 error = bread(imp->im_devvp,
747 lbn << (imp->im_bshift - DEV_BSHIFT),
748 imp->logical_block_size, NOCRED, &bp);
752 printf("fhtovp: bread error %d\n",error);
755 isodir = (struct iso_directory_record *)(bp->b_data + off);
757 if (off + isonum_711(isodir->length) >
758 imp->logical_block_size) {
761 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
762 off +isonum_711(isodir->length), off,
763 isonum_711(isodir->length));
768 if (isonum_733(isodir->extent) +
769 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
771 printf("fhtovp: file start miss %d vs %d\n",
772 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
784 * On relocated directories we must
785 * read the `.' entry out of a dir.
787 ip->iso_start = ino >> imp->im_bshift;
790 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
794 isodir = (struct iso_directory_record *)bp->b_data;
797 ip->iso_extent = isonum_733(isodir->extent);
798 ip->i_size = isonum_733(isodir->size);
799 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
802 * Setup time stamp, attribute
805 switch (imp->iso_ftype) {
806 default: /* ISO_FTYPE_9660 */
810 if ((imp->im_flags & ISOFSMNT_EXTATT)
811 && (off = isonum_711(isodir->ext_attr_length)))
812 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
816 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
817 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
823 cd9660_rrip_analyze(isodir, ip, imp);
830 * Initialize the associated vnode
832 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
834 vp->v_op = &cd9660_fifoops;
841 if (ip->iso_extent == imp->root_extent)
842 vp->v_vflag |= VV_ROOT;
845 * XXX need generation number?