fb94bd994e
files are off the vendor branch, so this should not change anything. A "U" marker generally means that the file was not changed in between the 4.4Lite and Lite-2 releases, and does not need a merge. "C" generally means that there was a change. [note, new file: cd9660_mount.h]
719 lines
18 KiB
C
719 lines
18 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
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|
* 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 8.3 (Berkeley) 1/31/94
|
|
* $Id: cd9660_vfsops.c,v 1.14 1995/08/11 11:31:01 davidg Exp $
|
|
*/
|
|
|
|
#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 <miscfs/specfs/specdev.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/file.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <isofs/cd9660/iso.h>
|
|
#include <isofs/cd9660/cd9660_node.h>
|
|
#include <isofs/cd9660/iso_rrip.h>
|
|
|
|
|
|
static int cd9660_mount __P((struct mount *,
|
|
char *, caddr_t, struct nameidata *, struct proc *));
|
|
static int cd9660_start __P((struct mount *, int, struct proc *));
|
|
static int cd9660_unmount __P((struct mount *, int, struct proc *));
|
|
static int cd9660_root __P((struct mount *, struct vnode **));
|
|
static int cd9660_quotactl __P((struct mount *, int, uid_t, caddr_t,
|
|
struct proc *));
|
|
static int cd9660_statfs __P((struct mount *, struct statfs *, struct proc *));
|
|
static int cd9660_sync __P((struct mount *, int, struct ucred *,
|
|
struct proc *));
|
|
static int cd9660_vget __P((struct mount *, ino_t, struct vnode **));
|
|
static int cd9660_fhtovp __P((struct mount *, struct fid *, struct mbuf *,
|
|
struct vnode **, int *, struct ucred **));
|
|
static int cd9660_vptofh __P((struct vnode *, struct fid *));
|
|
|
|
static struct vfsops cd9660_vfsops = {
|
|
cd9660_mount,
|
|
cd9660_start,
|
|
cd9660_unmount,
|
|
cd9660_root,
|
|
cd9660_quotactl,
|
|
cd9660_statfs,
|
|
cd9660_sync,
|
|
cd9660_vget,
|
|
cd9660_fhtovp,
|
|
cd9660_vptofh,
|
|
cd9660_init,
|
|
};
|
|
VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, VFCF_READONLY);
|
|
|
|
|
|
/*
|
|
* Called by vfs_mountroot when iso is going to be mounted as root.
|
|
*
|
|
* Name is updated by mount(8) after booting.
|
|
*/
|
|
#define ROOTNAME "root_device"
|
|
|
|
static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
|
|
struct proc *p, struct iso_args *argp));
|
|
|
|
int
|
|
cd9660_mountroot()
|
|
{
|
|
register struct mount *mp;
|
|
struct proc *p = curproc; /* XXX */
|
|
struct iso_mnt *imp;
|
|
u_int size;
|
|
int error;
|
|
struct iso_args args;
|
|
|
|
/*
|
|
* Get vnode for rootdev.
|
|
*/
|
|
if (bdevvp(rootdev, &rootvp))
|
|
panic("cd9660_mountroot: can't setup bdevvp for rootdev");
|
|
|
|
mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
|
|
bzero((char *)mp, (u_long)sizeof(struct mount));
|
|
mp->mnt_op = &cd9660_vfsops;
|
|
mp->mnt_flag = MNT_RDONLY;
|
|
args.flags = ISOFSMNT_ROOT;
|
|
if ((error = iso_mountfs(rootvp, mp, p, &args))) {
|
|
free(mp, M_MOUNT);
|
|
return (error);
|
|
}
|
|
if ((error = vfs_lock(mp))) {
|
|
(void)cd9660_unmount(mp, 0, p);
|
|
free(mp, M_MOUNT);
|
|
return (error);
|
|
}
|
|
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
mp->mnt_flag |= MNT_ROOTFS;
|
|
mp->mnt_vnodecovered = NULLVP;
|
|
imp = VFSTOISOFS(mp);
|
|
bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
|
|
imp->im_fsmnt[0] = '/';
|
|
bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
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|
MNAMELEN);
|
|
(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
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|
&size);
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|
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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|
(void) cd9660_statfs(mp, &mp->mnt_stat, p);
|
|
vfs_unlock(mp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Flag to allow forcible unmounting.
|
|
*/
|
|
static int iso_doforce = 1;
|
|
|
|
/*
|
|
* 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;
|
|
u_int size;
|
|
int error;
|
|
struct iso_mnt *imp = 0;
|
|
|
|
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);
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|
devvp = ndp->ni_vp;
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|
|
|
if (devvp->v_type != VBLK) {
|
|
vrele(devvp);
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|
return ENOTBLK;
|
|
}
|
|
if (major(devvp->v_rdev) >= nblkdev) {
|
|
vrele(devvp);
|
|
return ENXIO;
|
|
}
|
|
if ((mp->mnt_flag & MNT_UPDATE) == 0)
|
|
error = iso_mountfs(devvp, mp, p, &args);
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|
else {
|
|
if (devvp != imp->im_devvp)
|
|
error = EINVAL; /* needs translation */
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|
else
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|
vrele(devvp);
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|
}
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|
if (error) {
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|
vrele(devvp);
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|
return error;
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|
}
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|
imp = VFSTOISOFS(mp);
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|
(void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
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bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
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|
bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
|
|
MNAMELEN);
|
|
(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);
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|
return 0;
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|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
static int
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|
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;
|
|
dev_t dev = devvp->v_rdev;
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|
int error = EINVAL;
|
|
int needclose = 0;
|
|
int high_sierra = 0;
|
|
int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
int iso_bsize;
|
|
int iso_blknum;
|
|
struct iso_volume_descriptor *vdp;
|
|
struct iso_primary_descriptor *pri;
|
|
struct iso_sierra_primary_descriptor *pri_sierra;
|
|
struct iso_directory_record *rootp;
|
|
int logical_block_size;
|
|
|
|
if (!ronly)
|
|
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);
|
|
|
|
if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)))
|
|
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;
|
|
|
|
for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
|
|
if ((error = bread (devvp, btodb(iso_blknum * iso_bsize),
|
|
iso_bsize, NOCRED, &bp)))
|
|
goto out;
|
|
|
|
vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
|
|
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;
|
|
}
|
|
|
|
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_END) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_PRIMARY)
|
|
break;
|
|
brelse(bp);
|
|
}
|
|
|
|
if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) != ISO_VD_PRIMARY) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
pri = (struct iso_primary_descriptor *)vdp;
|
|
pri_sierra = (struct iso_sierra_primary_descriptor *)vdp;
|
|
|
|
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);
|
|
bzero((caddr_t)isomp, sizeof *isomp);
|
|
isomp->logical_block_size = logical_block_size;
|
|
isomp->volume_space_size =
|
|
isonum_733 (high_sierra?
|
|
pri_sierra->volume_space_size:
|
|
pri->volume_space_size);
|
|
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 = 0;
|
|
while ((1 << isomp->im_bshift) < isomp->logical_block_size)
|
|
isomp->im_bshift++;
|
|
|
|
bp->b_flags |= B_AGE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
|
|
mp->mnt_data = (qaddr_t)isomp;
|
|
mp->mnt_stat.f_fsid.val[0] = (long)dev;
|
|
mp->mnt_stat.f_fsid.val[1] = MOUNT_CD9660;
|
|
mp->mnt_maxsymlinklen = 0;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
isomp->im_mountp = mp;
|
|
isomp->im_dev = dev;
|
|
isomp->im_devvp = devvp;
|
|
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
|
|
/* 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->logical_block_size / DEV_BSIZE,
|
|
isomp->logical_block_size,NOCRED,&bp)))
|
|
goto out;
|
|
|
|
rootp = (struct iso_directory_record *)bp->b_un.b_addr;
|
|
|
|
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);
|
|
|
|
if(high_sierra)
|
|
/* this effectively ignores all the mount flags */
|
|
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:
|
|
isomp->iso_ftype = ISO_FTYPE_RRIP;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
if (bp)
|
|
brelse(bp);
|
|
if (needclose)
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
|
|
if (isomp) {
|
|
free((caddr_t)isomp, M_ISOFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Make a filesystem operational.
|
|
* Nothing to do at the moment.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
cd9660_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
if (!iso_doforce)
|
|
return (EINVAL);
|
|
flags |= FORCECLOSE;
|
|
}
|
|
#if 0
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp))
|
|
return EBUSY;
|
|
#endif
|
|
if ((error = vflush(mp, NULLVP, flags)))
|
|
return (error);
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
#ifdef ISODEVMAP
|
|
if (isomp->iso_ftype == ISO_FTYPE_RRIP)
|
|
iso_dunmap(isomp->im_dev);
|
|
#endif
|
|
|
|
isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
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;
|
|
{
|
|
register struct iso_node *ip;
|
|
struct iso_node tip, *nip;
|
|
struct vnode tvp;
|
|
int error;
|
|
struct iso_mnt *imp = VFSTOISOFS (mp);
|
|
struct iso_directory_record *dp;
|
|
|
|
tvp.v_mount = mp;
|
|
tvp.v_data = &tip;
|
|
ip = VTOI(&tvp);
|
|
ip->i_vnode = &tvp;
|
|
ip->i_dev = imp->im_dev;
|
|
ip->i_diroff = 0;
|
|
dp = (struct iso_directory_record *)imp->root;
|
|
isodirino(&ip->i_number,dp,imp);
|
|
|
|
/*
|
|
* With RRIP we must use the `.' entry of the root directory.
|
|
* Simply tell iget, that it's a relocated directory.
|
|
*/
|
|
error = iso_iget(ip,ip->i_number,
|
|
imp->iso_ftype == ISO_FTYPE_RRIP,
|
|
&nip,dp);
|
|
if (error)
|
|
return error;
|
|
*vpp = ITOV(nip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Do operations associated with quotas, not supported
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
cd9660_quotactl(mp, cmd, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmd;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* 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_type = MOUNT_CD9660;
|
|
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) {
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
|
|
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
|
|
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
|
|
}
|
|
/* Use the first spare for flags: */
|
|
sbp->f_spare[0] = isomp->im_flags;
|
|
return 0;
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
cd9660_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Flat namespace lookup.
|
|
* Currently unsupported.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
cd9660_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* 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, nam, vpp, exflagsp, credanonp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
struct vnode tvp;
|
|
int error;
|
|
int lbn, off;
|
|
struct ifid *ifhp;
|
|
struct iso_mnt *imp;
|
|
struct buf *bp;
|
|
struct iso_directory_record *dirp;
|
|
struct iso_node tip, *ip, *nip;
|
|
struct netcred *np;
|
|
|
|
imp = VFSTOISOFS (mp);
|
|
ifhp = (struct ifid *)fhp;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("fhtovp: ino %d, start %ld\n",
|
|
ifhp->ifid_ino, ifhp->ifid_start);
|
|
#endif
|
|
|
|
np = vfs_export_lookup(mp, &imp->im_export, nam);
|
|
if (np == NULL)
|
|
return (EACCES);
|
|
|
|
lbn = iso_lblkno(imp, ifhp->ifid_ino);
|
|
if (lbn >= imp->volume_space_size) {
|
|
printf("fhtovp: lbn exceed volume space %d\n", lbn);
|
|
return (ESTALE);
|
|
}
|
|
|
|
off = iso_blkoff(imp, ifhp->ifid_ino);
|
|
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
|
|
printf("fhtovp: crosses block boundary %d\n",
|
|
off + ISO_DIRECTORY_RECORD_SIZE);
|
|
return (ESTALE);
|
|
}
|
|
|
|
error = bread(imp->im_devvp, btodb(lbn * imp->logical_block_size),
|
|
imp->logical_block_size, NOCRED, &bp);
|
|
if (error) {
|
|
printf("fhtovp: bread error %d\n",error);
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
|
|
dirp = (struct iso_directory_record *)(bp->b_un.b_addr + off);
|
|
if (off + isonum_711(dirp->length) > imp->logical_block_size) {
|
|
brelse(bp);
|
|
printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
|
|
off+isonum_711(dirp->length), off,
|
|
isonum_711(dirp->length));
|
|
return (ESTALE);
|
|
}
|
|
|
|
if (isonum_733(dirp->extent) + isonum_711(dirp->ext_attr_length) !=
|
|
ifhp->ifid_start) {
|
|
brelse(bp);
|
|
printf("fhtovp: file start miss %d vs %ld\n",
|
|
isonum_733(dirp->extent)+isonum_711(dirp->ext_attr_length),
|
|
ifhp->ifid_start);
|
|
return (ESTALE);
|
|
}
|
|
brelse(bp);
|
|
|
|
ip = &tip;
|
|
tvp.v_mount = mp;
|
|
tvp.v_data = ip;
|
|
ip->i_vnode = &tvp;
|
|
ip->i_dev = imp->im_dev;
|
|
if ((error = iso_iget(ip, ifhp->ifid_ino, 0, &nip, dirp))) {
|
|
*vpp = NULLVP;
|
|
printf("fhtovp: failed to get inode\n");
|
|
return (error);
|
|
}
|
|
ip = nip;
|
|
/*
|
|
* XXX need generation number?
|
|
*/
|
|
if (ip->inode.iso_mode == 0) {
|
|
iso_iput(ip);
|
|
*vpp = NULLVP;
|
|
printf("fhtovp: inode mode == 0\n");
|
|
return (ESTALE);
|
|
}
|
|
*vpp = ITOV(ip);
|
|
*exflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
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;
|
|
}
|