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>
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 iso_mountfs(struct vnode *devvp, struct mount *mp,
99 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
101 struct iso_args args;
104 error = copyin(data, &args, sizeof args);
108 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
109 ma = mount_arg(ma, "export", &args.export, sizeof args.export);
110 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64);
111 ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
112 ma = mount_argf(ma, "ssector", "%u", args.ssector);
113 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip");
114 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens");
115 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt");
116 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet");
118 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet");
119 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv");
121 error = kernel_mount(ma, flags);
127 cd9660_mount(struct mount *mp, struct thread *td)
133 struct nameidata ndp;
134 struct iso_mnt *imp = 0;
137 * Unconditionally mount as read-only.
140 mp->mnt_flag |= MNT_RDONLY;
143 fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
147 imp = VFSTOISOFS(mp);
149 if (mp->mnt_flag & MNT_UPDATE) {
150 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
154 * Not an update, or updating the name: look up the name
155 * and verify that it refers to a sensible block device.
157 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
158 if ((error = namei(&ndp)))
160 NDFREE(&ndp, NDF_ONLY_PNBUF);
163 if (!vn_isdisk(devvp, &error)) {
169 * Verify that user has necessary permissions on the device,
170 * or has superuser abilities
173 error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
175 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
181 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
182 error = iso_mountfs(devvp, mp, td);
186 if (devvp != imp->im_devvp)
187 error = EINVAL; /* needs translation */
192 vfs_mountedfrom(mp, fspec);
197 * Common code for mount and mountroot
200 iso_mountfs(devvp, mp, td)
205 struct iso_mnt *isomp = (struct iso_mnt *)0;
206 struct buf *bp = NULL;
207 struct buf *pribp = NULL, *supbp = NULL;
214 struct iso_volume_descriptor *vdp = 0;
215 struct iso_primary_descriptor *pri = NULL;
216 struct iso_sierra_primary_descriptor *pri_sierra = NULL;
217 struct iso_supplementary_descriptor *sup = NULL;
218 struct iso_directory_record *rootp;
219 int logical_block_size, ssector;
220 struct g_consumer *cp;
222 char *cs_local, *cs_disk;
228 error = g_vfs_open(devvp, &cp, "cd9660", 0);
231 VOP_UNLOCK(devvp, 0, td);
234 if (devvp->v_rdev->si_iosize_max != 0)
235 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
236 if (mp->mnt_iosize_max > MAXPHYS)
237 mp->mnt_iosize_max = MAXPHYS;
239 bo = &devvp->v_bufobj;
241 /* This is the "logical sector size". The standard says this
242 * should be 2048 or the physical sector size on the device,
243 * whichever is greater.
245 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) {
250 iso_bsize = cp->provider->sectorsize;
253 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector))
255 for (iso_blknum = 16 + ssector;
256 iso_blknum < 100 + ssector;
258 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE),
259 iso_bsize, NOCRED, &bp)) != 0)
262 vdp = (struct iso_volume_descriptor *)bp->b_data;
263 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
264 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
265 sizeof vdp->id) != 0) {
271 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
276 pri = (struct iso_primary_descriptor *)vdp;
278 (struct iso_sierra_primary_descriptor *)vdp;
282 case ISO_VD_SUPPLEMENTARY:
286 sup = (struct iso_supplementary_descriptor *)vdp;
288 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) {
289 if (bcmp(sup->escape, "%/@", 3) == 0)
291 if (bcmp(sup->escape, "%/C", 3) == 0)
293 if (bcmp(sup->escape, "%/E", 3) == 0)
296 if ((isonum_711 (sup->flags) & 1) &&
297 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0))
326 isonum_723 (high_sierra?
327 pri_sierra->logical_block_size:
328 pri->logical_block_size);
330 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
331 || (logical_block_size & (logical_block_size - 1)) != 0) {
336 rootp = (struct iso_directory_record *)
338 pri_sierra->root_directory_record:
339 pri->root_directory_record);
341 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
344 isomp->logical_block_size = logical_block_size;
345 isomp->volume_space_size =
346 isonum_733 (high_sierra?
347 pri_sierra->volume_space_size:
348 pri->volume_space_size);
349 isomp->joliet_level = 0;
351 * Since an ISO9660 multi-session CD can also access previous
352 * sessions, we have to include them into the space consider-
353 * ations. This doesn't yield a very accurate number since
354 * parts of the old sessions might be inaccessible now, but we
355 * can't do much better. This is also important for the NFS
356 * filehandle validation.
358 isomp->volume_space_size += ssector;
359 bcopy (rootp, isomp->root, sizeof isomp->root);
360 isomp->root_extent = isonum_733 (rootp->extent);
361 isomp->root_size = isonum_733 (rootp->size);
363 isomp->im_bmask = logical_block_size - 1;
364 isomp->im_bshift = ffs(logical_block_size) - 1;
366 pribp->b_flags |= B_AGE;
370 mp->mnt_data = (qaddr_t)isomp;
371 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
372 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
373 mp->mnt_maxsymlinklen = 0;
375 mp->mnt_flag |= MNT_LOCAL;
376 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED;
378 isomp->im_mountp = mp;
380 isomp->im_devvp = devvp;
382 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP);
383 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS);
384 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT);
385 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET);
386 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV);
388 /* Check the Rock Ridge Extension support */
389 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) {
390 if ((error = bread(isomp->im_devvp,
391 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
392 (isomp->im_bshift - DEV_BSHIFT),
393 isomp->logical_block_size, NOCRED, &bp)) != 0)
396 rootp = (struct iso_directory_record *)bp->b_data;
398 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
399 isomp->im_flags |= ISOFSMNT_NORRIP;
401 isomp->im_flags &= ~ISOFSMNT_GENS;
405 * The contents are valid,
406 * but they will get reread as part of another vnode, so...
408 bp->b_flags |= B_AGE;
413 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
414 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
417 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error);
420 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l);
421 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d);
423 isomp->im_d2l = NULL;
424 isomp->im_l2d = NULL;
428 /* this effectively ignores all the mount flags */
430 log(LOG_INFO, "cd9660: High Sierra Format\n");
431 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
433 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
435 isomp->iso_ftype = ISO_FTYPE_DEFAULT;
437 case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
438 isomp->iso_ftype = ISO_FTYPE_9660;
442 log(LOG_INFO, "cd9660: RockRidge Extension\n");
443 isomp->iso_ftype = ISO_FTYPE_RRIP;
447 /* Decide whether to use the Joliet descriptor */
449 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
451 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n",
453 rootp = (struct iso_directory_record *)
454 sup->root_directory_record;
455 bcopy (rootp, isomp->root, sizeof isomp->root);
456 isomp->root_extent = isonum_733 (rootp->extent);
457 isomp->root_size = isonum_733 (rootp->size);
458 isomp->joliet_level = joliet_level;
459 supbp->b_flags |= B_AGE;
483 free((caddr_t)isomp, M_ISOFSMNT);
484 mp->mnt_data = (qaddr_t)0;
491 * unmount system call
494 cd9660_unmount(mp, mntflags, td)
499 struct iso_mnt *isomp;
500 int error, flags = 0;
502 if (mntflags & MNT_FORCE)
509 if ((error = vflush(mp, 0, flags, td)))
512 isomp = VFSTOISOFS(mp);
514 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
516 cd9660_iconv->close(isomp->im_d2l);
518 cd9660_iconv->close(isomp->im_l2d);
522 g_vfs_close(isomp->im_cp, td);
525 vrele(isomp->im_devvp);
526 dev_rel(isomp->im_dev);
527 free((caddr_t)isomp, M_ISOFSMNT);
528 mp->mnt_data = (qaddr_t)0;
530 mp->mnt_flag &= ~MNT_LOCAL;
536 * Return root of a filesystem
539 cd9660_root(mp, flags, vpp, td)
545 struct iso_mnt *imp = VFSTOISOFS(mp);
546 struct iso_directory_record *dp =
547 (struct iso_directory_record *)imp->root;
548 ino_t ino = isodirino(dp, imp);
551 * With RRIP we must use the `.' entry of the root directory.
552 * Simply tell vget, that it's a relocated directory.
554 return (cd9660_vget_internal(mp, ino, flags, vpp,
555 imp->iso_ftype == ISO_FTYPE_RRIP, dp));
559 * Get filesystem statistics.
562 cd9660_statfs(mp, sbp, td)
567 struct iso_mnt *isomp;
569 isomp = VFSTOISOFS(mp);
571 sbp->f_bsize = isomp->logical_block_size;
572 sbp->f_iosize = sbp->f_bsize; /* XXX */
573 sbp->f_blocks = isomp->volume_space_size;
574 sbp->f_bfree = 0; /* total free blocks */
575 sbp->f_bavail = 0; /* blocks free for non superuser */
576 sbp->f_files = 0; /* total files */
577 sbp->f_ffree = 0; /* free file nodes */
582 * File handle to vnode
584 * Have to be really careful about stale file handles:
585 * - check that the inode number is in range
586 * - call iget() to get the locked inode
587 * - check for an unallocated inode (i_mode == 0)
588 * - check that the generation number matches
593 cd9660_fhtovp(mp, fhp, vpp)
598 struct ifid *ifhp = (struct ifid *)fhp;
604 printf("fhtovp: ino %d, start %ld\n",
605 ifhp->ifid_ino, ifhp->ifid_start);
608 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
613 if (ip->inode.iso_mode == 0) {
619 vnode_create_vobject(*vpp, ip->i_size, curthread);
624 cd9660_vget(mp, ino, flags, vpp)
633 * It would be nice if we didn't always set the `relocated' flag
634 * and force the extra read, but I don't want to think about fixing
637 return (cd9660_vget_internal(mp, ino, flags, vpp,
639 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
643 (struct iso_directory_record *)0));
647 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
653 struct iso_directory_record *isodir;
664 error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL);
665 if (error || *vpp != NULL)
669 * We must promote to an exclusive lock for vnode creation. This
670 * can happen if lookup is passed LOCKSHARED.
672 if ((flags & LK_TYPE_MASK) == LK_SHARED) {
673 flags &= ~LK_TYPE_MASK;
674 flags |= LK_EXCLUSIVE;
678 * We do not lock vnode creation as it is believed to be too
679 * expensive for such rare case as simultaneous creation of vnode
680 * for same ino by different processes. We just allow them to race
681 * and check later to decide who wins. Let the race begin!
684 imp = VFSTOISOFS(mp);
687 /* Allocate a new vnode/iso_node. */
688 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) {
692 MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
698 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL, td);
699 error = insmntque(vp, mp);
701 free(ip, M_ISOFSNODE);
705 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL);
706 if (error || *vpp != NULL)
712 lbn = lblkno(imp, ino);
713 if (lbn >= imp->volume_space_size) {
715 printf("fhtovp: lbn exceed volume space %d\n", lbn);
719 off = blkoff(imp, ino);
720 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
722 printf("fhtovp: crosses block boundary %d\n",
723 off + ISO_DIRECTORY_RECORD_SIZE);
727 error = bread(imp->im_devvp,
728 lbn << (imp->im_bshift - DEV_BSHIFT),
729 imp->logical_block_size, NOCRED, &bp);
733 printf("fhtovp: bread error %d\n",error);
736 isodir = (struct iso_directory_record *)(bp->b_data + off);
738 if (off + isonum_711(isodir->length) >
739 imp->logical_block_size) {
743 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
744 off +isonum_711(isodir->length), off,
745 isonum_711(isodir->length));
750 if (isonum_733(isodir->extent) +
751 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
754 printf("fhtovp: file start miss %d vs %d\n",
755 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
767 * On relocated directories we must
768 * read the `.' entry out of a dir.
770 ip->iso_start = ino >> imp->im_bshift;
773 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
777 isodir = (struct iso_directory_record *)bp->b_data;
780 ip->iso_extent = isonum_733(isodir->extent);
781 ip->i_size = isonum_733(isodir->size);
782 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
785 * Setup time stamp, attribute
788 switch (imp->iso_ftype) {
789 default: /* ISO_FTYPE_9660 */
793 if ((imp->im_flags & ISOFSMNT_EXTATT)
794 && (off = isonum_711(isodir->ext_attr_length)))
795 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
799 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
800 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
806 cd9660_rrip_analyze(isodir, ip, imp);
814 * Initialize the associated vnode
816 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
818 vp->v_op = &cd9660_fifoops;
821 vp->v_vnlock->lk_flags &= ~LK_NOSHARE;
825 if (ip->iso_extent == imp->root_extent)
826 vp->v_vflag |= VV_ROOT;
829 * XXX need generation number?