902 lines
22 KiB
C
902 lines
22 KiB
C
/*-
|
|
* Copyright (c) 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley
|
|
* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
|
|
* Support code is derived from software contributed to Berkeley
|
|
* by Atsushi Murai (amurai@spec.co.jp).
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/cdio.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/syslog.h>
|
|
|
|
|
|
#include <isofs/cd9660/iso.h>
|
|
#include <isofs/cd9660/iso_rrip.h>
|
|
#include <isofs/cd9660/cd9660_node.h>
|
|
#include <isofs/cd9660/cd9660_mount.h>
|
|
|
|
MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
|
|
MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
|
|
|
|
static int cd9660_mount __P((struct mount *,
|
|
char *, caddr_t, struct nameidata *, struct proc *));
|
|
static int cd9660_unmount __P((struct mount *, int, struct proc *));
|
|
static int cd9660_root __P((struct mount *, struct vnode **));
|
|
static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *));
|
|
static int cd9660_vget __P((struct mount *, ino_t, struct vnode **));
|
|
static int cd9660_fhtovp __P((struct mount *, struct fid *, struct vnode **));
|
|
static int cd9660_checkexp __P((struct mount *, struct sockaddr *,
|
|
int *, struct ucred **));
|
|
static int cd9660_vptofh __P((struct vnode *, struct fid *));
|
|
|
|
static struct vfsops cd9660_vfsops = {
|
|
cd9660_mount,
|
|
vfs_stdstart,
|
|
cd9660_unmount,
|
|
cd9660_root,
|
|
vfs_stdquotactl,
|
|
cd9660_statfs,
|
|
vfs_stdsync,
|
|
cd9660_vget,
|
|
cd9660_fhtovp,
|
|
cd9660_checkexp,
|
|
cd9660_vptofh,
|
|
cd9660_init,
|
|
cd9660_uninit,
|
|
vfs_stdextattrctl,
|
|
};
|
|
VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
|
|
|
|
|
|
/*
|
|
* Called by vfs_mountroot when iso is going to be mounted as root.
|
|
*/
|
|
|
|
static int iso_get_ssector __P((dev_t dev, struct proc *p));
|
|
static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
|
|
struct proc *p, struct iso_args *argp));
|
|
|
|
/*
|
|
* Try to find the start of the last data track on this CD-ROM. This
|
|
* is used to mount the last session of a multi-session CD. Bail out
|
|
* and return 0 if we fail, this is always a safe bet.
|
|
*/
|
|
static int
|
|
iso_get_ssector(dev, p)
|
|
dev_t dev;
|
|
struct proc *p;
|
|
{
|
|
struct ioc_toc_header h;
|
|
struct ioc_read_toc_single_entry t;
|
|
int i;
|
|
struct cdevsw *bd;
|
|
d_ioctl_t *ioctlp;
|
|
|
|
bd = devsw(dev);
|
|
ioctlp = bd->d_ioctl;
|
|
if (ioctlp == NULL)
|
|
return 0;
|
|
|
|
if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, p) != 0)
|
|
return 0;
|
|
|
|
for (i = h.ending_track; i >= 0; i--) {
|
|
t.address_format = CD_LBA_FORMAT;
|
|
t.track = i;
|
|
if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, p) != 0)
|
|
return 0;
|
|
if ((t.entry.control & 4) != 0)
|
|
/* found a data track */
|
|
break;
|
|
}
|
|
|
|
if (i < 0)
|
|
return 0;
|
|
|
|
return ntohl(t.entry.addr.lba);
|
|
}
|
|
|
|
static int iso_mountroot __P((struct mount *mp, struct proc *p));
|
|
|
|
static int
|
|
iso_mountroot(mp, p)
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
{
|
|
struct iso_args args;
|
|
int error;
|
|
|
|
if ((error = bdevvp(rootdev, &rootvp))) {
|
|
printf("iso_mountroot: can't find rootvp\n");
|
|
return (error);
|
|
}
|
|
args.flags = ISOFSMNT_ROOT;
|
|
args.ssector = iso_get_ssector(rootdev, p);
|
|
if (bootverbose)
|
|
printf("iso_mountroot(): using session at block %d\n",
|
|
args.ssector);
|
|
if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0)
|
|
return (error);
|
|
|
|
(void)cd9660_statfs(mp, &mp->mnt_stat, p);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* VFS Operations.
|
|
*
|
|
* mount system call
|
|
*/
|
|
static int
|
|
cd9660_mount(mp, path, data, ndp, p)
|
|
register struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *devvp;
|
|
struct iso_args args;
|
|
size_t size;
|
|
int error;
|
|
mode_t accessmode;
|
|
struct iso_mnt *imp = 0;
|
|
|
|
if ((mp->mnt_flag & MNT_ROOTFS) != 0) {
|
|
return (iso_mountroot(mp, p));
|
|
}
|
|
if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
|
|
return (error);
|
|
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
return (EROFS);
|
|
|
|
/*
|
|
* If updating, check whether changing from read-only to
|
|
* read/write; if there is no device name, that's all we do.
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
imp = VFSTOISOFS(mp);
|
|
if (args.fspec == 0)
|
|
return (vfs_export(mp, &imp->im_export, &args.export));
|
|
}
|
|
/*
|
|
* Not an update, or updating the name: look up the name
|
|
* and verify that it refers to a sensible block device.
|
|
*/
|
|
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
|
|
if ((error = namei(ndp)))
|
|
return (error);
|
|
NDFREE(ndp, NDF_ONLY_PNBUF);
|
|
devvp = ndp->ni_vp;
|
|
|
|
if (!vn_isdisk(devvp, &error)) {
|
|
vrele(devvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Verify that user has necessary permissions on the device,
|
|
* or has superuser abilities
|
|
*/
|
|
accessmode = VREAD;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p);
|
|
if (error)
|
|
error = suser(p);
|
|
if (error) {
|
|
vput(devvp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(devvp, 0, p);
|
|
|
|
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
|
|
error = iso_mountfs(devvp, mp, p, &args);
|
|
} else {
|
|
if (devvp != imp->im_devvp)
|
|
error = EINVAL; /* needs translation */
|
|
else
|
|
vrele(devvp);
|
|
}
|
|
if (error) {
|
|
vrele(devvp);
|
|
return error;
|
|
}
|
|
imp = VFSTOISOFS(mp);
|
|
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
|
|
(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
|
|
&size);
|
|
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
(void) cd9660_statfs(mp, &mp->mnt_stat, p);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
static int
|
|
iso_mountfs(devvp, mp, p, argp)
|
|
register struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
struct iso_args *argp;
|
|
{
|
|
register struct iso_mnt *isomp = (struct iso_mnt *)0;
|
|
struct buf *bp = NULL;
|
|
struct buf *pribp = NULL, *supbp = NULL;
|
|
dev_t dev = devvp->v_rdev;
|
|
int error = EINVAL;
|
|
int needclose = 0;
|
|
int high_sierra = 0;
|
|
int iso_bsize;
|
|
int iso_blknum;
|
|
int joliet_level;
|
|
struct iso_volume_descriptor *vdp = 0;
|
|
struct iso_primary_descriptor *pri = NULL;
|
|
struct iso_sierra_primary_descriptor *pri_sierra = NULL;
|
|
struct iso_supplementary_descriptor *sup = NULL;
|
|
struct iso_directory_record *rootp;
|
|
int logical_block_size;
|
|
|
|
if (!(mp->mnt_flag & MNT_RDONLY))
|
|
return EROFS;
|
|
|
|
/*
|
|
* Disallow multiple mounts of the same device.
|
|
* Disallow mounting of a device that is currently in use
|
|
* (except for root, which might share swap device for miniroot).
|
|
* Flush out any old buffers remaining from a previous use.
|
|
*/
|
|
if ((error = vfs_mountedon(devvp)))
|
|
return error;
|
|
if (vcount(devvp) > 1 && devvp != rootvp)
|
|
return EBUSY;
|
|
if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)))
|
|
return (error);
|
|
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
error = VOP_OPEN(devvp, FREAD, FSCRED, p);
|
|
VOP_UNLOCK(devvp, 0, p);
|
|
if (error)
|
|
return error;
|
|
|
|
needclose = 1;
|
|
|
|
/* This is the "logical sector size". The standard says this
|
|
* should be 2048 or the physical sector size on the device,
|
|
* whichever is greater. For now, we'll just use a constant.
|
|
*/
|
|
iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
|
|
|
|
joliet_level = 0;
|
|
for (iso_blknum = 16 + argp->ssector;
|
|
iso_blknum < 100 + argp->ssector;
|
|
iso_blknum++) {
|
|
if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
|
|
iso_bsize, NOCRED, &bp)) != 0)
|
|
goto out;
|
|
|
|
vdp = (struct iso_volume_descriptor *)bp->b_data;
|
|
if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
|
|
if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
|
|
sizeof vdp->id) != 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
} else
|
|
high_sierra = 1;
|
|
}
|
|
switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
|
|
case ISO_VD_PRIMARY:
|
|
if (pribp == NULL) {
|
|
pribp = bp;
|
|
bp = NULL;
|
|
pri = (struct iso_primary_descriptor *)vdp;
|
|
pri_sierra =
|
|
(struct iso_sierra_primary_descriptor *)vdp;
|
|
}
|
|
break;
|
|
|
|
case ISO_VD_SUPPLEMENTARY:
|
|
if (supbp == NULL) {
|
|
supbp = bp;
|
|
bp = NULL;
|
|
sup = (struct iso_supplementary_descriptor *)vdp;
|
|
|
|
if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
|
|
if (bcmp(sup->escape, "%/@", 3) == 0)
|
|
joliet_level = 1;
|
|
if (bcmp(sup->escape, "%/C", 3) == 0)
|
|
joliet_level = 2;
|
|
if (bcmp(sup->escape, "%/E", 3) == 0)
|
|
joliet_level = 3;
|
|
|
|
if (isonum_711 (sup->flags) & 1)
|
|
joliet_level = 0;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ISO_VD_END:
|
|
goto vd_end;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
if (bp) {
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
}
|
|
vd_end:
|
|
if (bp) {
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
|
|
if (pri == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
logical_block_size =
|
|
isonum_723 (high_sierra?
|
|
pri_sierra->logical_block_size:
|
|
pri->logical_block_size);
|
|
|
|
if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
|
|
|| (logical_block_size & (logical_block_size - 1)) != 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
rootp = (struct iso_directory_record *)
|
|
(high_sierra?
|
|
pri_sierra->root_directory_record:
|
|
pri->root_directory_record);
|
|
|
|
isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO);
|
|
isomp->logical_block_size = logical_block_size;
|
|
isomp->volume_space_size =
|
|
isonum_733 (high_sierra?
|
|
pri_sierra->volume_space_size:
|
|
pri->volume_space_size);
|
|
isomp->joliet_level = 0;
|
|
/*
|
|
* Since an ISO9660 multi-session CD can also access previous
|
|
* sessions, we have to include them into the space consider-
|
|
* ations. This doesn't yield a very accurate number since
|
|
* parts of the old sessions might be inaccessible now, but we
|
|
* can't do much better. This is also important for the NFS
|
|
* filehandle validation.
|
|
*/
|
|
isomp->volume_space_size += argp->ssector;
|
|
bcopy (rootp, isomp->root, sizeof isomp->root);
|
|
isomp->root_extent = isonum_733 (rootp->extent);
|
|
isomp->root_size = isonum_733 (rootp->size);
|
|
|
|
isomp->im_bmask = logical_block_size - 1;
|
|
isomp->im_bshift = ffs(logical_block_size) - 1;
|
|
|
|
pribp->b_flags |= B_AGE;
|
|
brelse(pribp);
|
|
pribp = NULL;
|
|
|
|
mp->mnt_data = (qaddr_t)isomp;
|
|
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
|
|
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
|
|
mp->mnt_maxsymlinklen = 0;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
isomp->im_mountp = mp;
|
|
isomp->im_dev = dev;
|
|
isomp->im_devvp = devvp;
|
|
|
|
devvp->v_rdev->si_mountpoint = mp;
|
|
|
|
/* Check the Rock Ridge Extention support */
|
|
if (!(argp->flags & ISOFSMNT_NORRIP)) {
|
|
if ((error = bread(isomp->im_devvp,
|
|
(isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
|
|
(isomp->im_bshift - DEV_BSHIFT),
|
|
isomp->logical_block_size, NOCRED, &bp)) != 0)
|
|
goto out;
|
|
|
|
rootp = (struct iso_directory_record *)bp->b_data;
|
|
|
|
if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
|
|
argp->flags |= ISOFSMNT_NORRIP;
|
|
} else {
|
|
argp->flags &= ~ISOFSMNT_GENS;
|
|
}
|
|
|
|
/*
|
|
* The contents are valid,
|
|
* but they will get reread as part of another vnode, so...
|
|
*/
|
|
bp->b_flags |= B_AGE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
|
|
ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
|
|
|
|
if (high_sierra) {
|
|
/* this effectively ignores all the mount flags */
|
|
log(LOG_INFO, "cd9660: High Sierra Format\n");
|
|
isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
|
|
} else
|
|
switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
|
|
default:
|
|
isomp->iso_ftype = ISO_FTYPE_DEFAULT;
|
|
break;
|
|
case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
|
|
isomp->iso_ftype = ISO_FTYPE_9660;
|
|
break;
|
|
case 0:
|
|
log(LOG_INFO, "cd9660: RockRidge Extension\n");
|
|
isomp->iso_ftype = ISO_FTYPE_RRIP;
|
|
break;
|
|
}
|
|
|
|
/* Decide whether to use the Joliet descriptor */
|
|
|
|
if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
|
|
log(LOG_INFO, "cd9660: Joliet Extension\n");
|
|
rootp = (struct iso_directory_record *)
|
|
sup->root_directory_record;
|
|
bcopy (rootp, isomp->root, sizeof isomp->root);
|
|
isomp->root_extent = isonum_733 (rootp->extent);
|
|
isomp->root_size = isonum_733 (rootp->size);
|
|
isomp->joliet_level = joliet_level;
|
|
supbp->b_flags |= B_AGE;
|
|
}
|
|
|
|
if (supbp) {
|
|
brelse(supbp);
|
|
supbp = NULL;
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
devvp->v_rdev->si_mountpoint = NULL;
|
|
if (bp)
|
|
brelse(bp);
|
|
if (pribp)
|
|
brelse(pribp);
|
|
if (supbp)
|
|
brelse(supbp);
|
|
if (needclose)
|
|
(void)VOP_CLOSE(devvp, FREAD, NOCRED, p);
|
|
if (isomp) {
|
|
free((caddr_t)isomp, M_ISOFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
static int
|
|
cd9660_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
register struct iso_mnt *isomp;
|
|
int error, flags = 0;
|
|
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
#if 0
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp))
|
|
return EBUSY;
|
|
#endif
|
|
if ((error = vflush(mp, NULLVP, flags)))
|
|
return (error);
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
isomp->im_devvp->v_rdev->si_mountpoint = NULL;
|
|
error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p);
|
|
vrele(isomp->im_devvp);
|
|
free((caddr_t)isomp, M_ISOFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return root of a filesystem
|
|
*/
|
|
static int
|
|
cd9660_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct iso_mnt *imp = VFSTOISOFS(mp);
|
|
struct iso_directory_record *dp =
|
|
(struct iso_directory_record *)imp->root;
|
|
ino_t ino = isodirino(dp, imp);
|
|
|
|
/*
|
|
* With RRIP we must use the `.' entry of the root directory.
|
|
* Simply tell vget, that it's a relocated directory.
|
|
*/
|
|
return (cd9660_vget_internal(mp, ino, vpp,
|
|
imp->iso_ftype == ISO_FTYPE_RRIP, dp));
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
cd9660_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
register struct iso_mnt *isomp;
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
sbp->f_bsize = isomp->logical_block_size;
|
|
sbp->f_iosize = sbp->f_bsize; /* XXX */
|
|
sbp->f_blocks = isomp->volume_space_size;
|
|
sbp->f_bfree = 0; /* total free blocks */
|
|
sbp->f_bavail = 0; /* blocks free for non superuser */
|
|
sbp->f_files = 0; /* total files */
|
|
sbp->f_ffree = 0; /* free file nodes */
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
|
|
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* File handle to vnode
|
|
*
|
|
* Have to be really careful about stale file handles:
|
|
* - check that the inode number is in range
|
|
* - call iget() to get the locked inode
|
|
* - check for an unallocated inode (i_mode == 0)
|
|
* - check that the generation number matches
|
|
*/
|
|
|
|
struct ifid {
|
|
ushort ifid_len;
|
|
ushort ifid_pad;
|
|
int ifid_ino;
|
|
long ifid_start;
|
|
};
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_fhtovp(mp, fhp, vpp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct ifid *ifhp = (struct ifid *)fhp;
|
|
register struct iso_node *ip;
|
|
struct vnode *nvp;
|
|
int error;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("fhtovp: ino %d, start %ld\n",
|
|
ifhp->ifid_ino, ifhp->ifid_start);
|
|
#endif
|
|
|
|
if ((error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) != 0) {
|
|
*vpp = NULLVP;
|
|
return (error);
|
|
}
|
|
ip = VTOI(nvp);
|
|
if (ip->inode.iso_mode == 0) {
|
|
vput(nvp);
|
|
*vpp = NULLVP;
|
|
return (ESTALE);
|
|
}
|
|
*vpp = nvp;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
cd9660_checkexp(mp, nam, exflagsp, credanonp)
|
|
struct mount *mp;
|
|
struct sockaddr *nam;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
register struct netcred *np;
|
|
register struct iso_mnt *imp;
|
|
|
|
imp = VFSTOISOFS(mp);
|
|
|
|
/*
|
|
* Get the export permission structure for this <mp, client> tuple.
|
|
*/
|
|
np = vfs_export_lookup(mp, &imp->im_export, nam);
|
|
if (np == NULL)
|
|
return (EACCES);
|
|
|
|
*exflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
cd9660_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
/*
|
|
* XXXX
|
|
* It would be nice if we didn't always set the `relocated' flag
|
|
* and force the extra read, but I don't want to think about fixing
|
|
* that right now.
|
|
*/
|
|
return (cd9660_vget_internal(mp, ino, vpp,
|
|
#if 0
|
|
VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
|
|
#else
|
|
0,
|
|
#endif
|
|
(struct iso_directory_record *)0));
|
|
}
|
|
|
|
int
|
|
cd9660_vget_internal(mp, ino, vpp, relocated, isodir)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
int relocated;
|
|
struct iso_directory_record *isodir;
|
|
{
|
|
struct iso_mnt *imp;
|
|
struct iso_node *ip;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int error;
|
|
|
|
imp = VFSTOISOFS(mp);
|
|
dev = imp->im_dev;
|
|
if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP)
|
|
return (0);
|
|
|
|
/* Allocate a new vnode/iso_node. */
|
|
if ((error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) != 0) {
|
|
*vpp = NULLVP;
|
|
return (error);
|
|
}
|
|
MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
|
|
M_WAITOK | M_ZERO);
|
|
lockinit(&vp->v_lock, PINOD, "isonode", 0, 0);
|
|
/*
|
|
* ISOFS uses stdlock and can share lock structure
|
|
*/
|
|
vp->v_vnlock = &vp->v_lock;
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
|
|
/*
|
|
* Put it onto its hash chain and lock it so that other requests for
|
|
* this inode will block if they arrive while we are sleeping waiting
|
|
* for old data structures to be purged or for the contents of the
|
|
* disk portion of this inode to be read.
|
|
*/
|
|
cd9660_ihashins(ip);
|
|
|
|
if (isodir == 0) {
|
|
int lbn, off;
|
|
|
|
lbn = lblkno(imp, ino);
|
|
if (lbn >= imp->volume_space_size) {
|
|
vput(vp);
|
|
printf("fhtovp: lbn exceed volume space %d\n", lbn);
|
|
return (ESTALE);
|
|
}
|
|
|
|
off = blkoff(imp, ino);
|
|
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
|
|
vput(vp);
|
|
printf("fhtovp: crosses block boundary %d\n",
|
|
off + ISO_DIRECTORY_RECORD_SIZE);
|
|
return (ESTALE);
|
|
}
|
|
|
|
error = bread(imp->im_devvp,
|
|
lbn << (imp->im_bshift - DEV_BSHIFT),
|
|
imp->logical_block_size, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
brelse(bp);
|
|
printf("fhtovp: bread error %d\n",error);
|
|
return (error);
|
|
}
|
|
isodir = (struct iso_directory_record *)(bp->b_data + off);
|
|
|
|
if (off + isonum_711(isodir->length) >
|
|
imp->logical_block_size) {
|
|
vput(vp);
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
|
|
off +isonum_711(isodir->length), off,
|
|
isonum_711(isodir->length));
|
|
return (ESTALE);
|
|
}
|
|
|
|
#if 0
|
|
if (isonum_733(isodir->extent) +
|
|
isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
printf("fhtovp: file start miss %d vs %d\n",
|
|
isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
|
|
ifhp->ifid_start);
|
|
return (ESTALE);
|
|
}
|
|
#endif
|
|
} else
|
|
bp = 0;
|
|
|
|
ip->i_mnt = imp;
|
|
ip->i_devvp = imp->im_devvp;
|
|
VREF(ip->i_devvp);
|
|
|
|
if (relocated) {
|
|
/*
|
|
* On relocated directories we must
|
|
* read the `.' entry out of a dir.
|
|
*/
|
|
ip->iso_start = ino >> imp->im_bshift;
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
isodir = (struct iso_directory_record *)bp->b_data;
|
|
}
|
|
|
|
ip->iso_extent = isonum_733(isodir->extent);
|
|
ip->i_size = isonum_733(isodir->size);
|
|
ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
|
|
|
|
/*
|
|
* Setup time stamp, attribute
|
|
*/
|
|
vp->v_type = VNON;
|
|
switch (imp->iso_ftype) {
|
|
default: /* ISO_FTYPE_9660 */
|
|
{
|
|
struct buf *bp2;
|
|
int off;
|
|
if ((imp->im_flags & ISOFSMNT_EXTATT)
|
|
&& (off = isonum_711(isodir->ext_attr_length)))
|
|
cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
|
|
&bp2);
|
|
else
|
|
bp2 = NULL;
|
|
cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
|
|
cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
|
|
if (bp2)
|
|
brelse(bp2);
|
|
break;
|
|
}
|
|
case ISO_FTYPE_RRIP:
|
|
cd9660_rrip_analyze(isodir, ip, imp);
|
|
break;
|
|
}
|
|
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
|
|
/*
|
|
* Initialize the associated vnode
|
|
*/
|
|
switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
|
|
case VFIFO:
|
|
vp->v_op = cd9660_fifoop_p;
|
|
break;
|
|
case VCHR:
|
|
case VBLK:
|
|
vp->v_op = cd9660_specop_p;
|
|
vp = addaliasu(vp, ip->inode.iso_rdev);
|
|
ip->i_vnode = vp;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (ip->iso_extent == imp->root_extent)
|
|
vp->v_flag |= VROOT;
|
|
|
|
/*
|
|
* XXX need generation number?
|
|
*/
|
|
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
register struct iso_node *ip = VTOI(vp);
|
|
register struct ifid *ifhp;
|
|
|
|
ifhp = (struct ifid *)fhp;
|
|
ifhp->ifid_len = sizeof(struct ifid);
|
|
|
|
ifhp->ifid_ino = ip->i_number;
|
|
ifhp->ifid_start = ip->iso_start;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("vptofh: ino %d, start %ld\n",
|
|
ifhp->ifid_ino,ifhp->ifid_start);
|
|
#endif
|
|
return 0;
|
|
}
|