/* $OpenBSD: cd9660_vfsops.c,v 1.46 2007/06/08 05:35:32 deraadt Exp $ */
/* $NetBSD: cd9660_vfsops.c,v 1.26 1997/06/13 15:38:58 pk Exp $ */
/*-
* 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. 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 8.9 (Berkeley) 12/5/94
*/
#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/disklabel.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_extern.h>
#include <isofs/cd9660/iso_rrip.h>
#include <isofs/cd9660/cd9660_node.h>
const 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,
cd9660_sysctl,
cd9660_check_export
};
/*
* Called by vfs_mountroot when iso is going to be mounted as root.
*/
static int iso_mountfs(struct vnode *devvp, struct mount *mp,
struct proc *p, struct iso_args *argp);
int iso_disklabelspoof(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp);
int
cd9660_mountroot()
{
struct mount *mp;
extern struct vnode *rootvp;
struct proc *p = curproc; /* XXX */
int error;
struct iso_args args;
/*
* Get vnodes for swapdev and rootdev.
*/
if ((error = bdevvp(swapdev, &swapdev_vp)) ||
(error = bdevvp(rootdev, &rootvp))) {
printf("cd9660_mountroot: can't setup bdevvp's");
return (error);
}
if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0)
return (error);
args.flags = ISOFSMNT_ROOT;
if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) {
mp->mnt_vfc->vfc_refcount--;
vfs_unbusy(mp);
free(mp, M_MOUNT);
return (error);
}
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
(void)cd9660_statfs(mp, &mp->mnt_stat, p);
vfs_unbusy(mp);
inittodr(0);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
int
cd9660_mount(mp, path, data, ndp, p)
register struct mount *mp;
const char *path;
void *data;
struct nameidata *ndp;
struct proc *p;
{
struct vnode *devvp;
struct iso_args args;
size_t size;
int error;
struct iso_mnt *imp = NULL;
error = copyin(data, &args, sizeof (struct iso_args));
if (error)
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_info));
}
/*
* 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)) != 0)
return (error);
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
vrele(devvp);
return (ENOTBLK);
}
if (major(devvp->v_rdev) >= nblkdev) {
vrele(devvp);
return (ENXIO);
}
/*
* If mount by non-root, then verify that user has necessary
* permissions on the device.
*/
if (p->p_ucred->cr_uid != 0) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_ACCESS(devvp, VREAD, p->p_ucred, 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);
bcopy(&args, &mp->mnt_stat.mount_info.iso_args, sizeof(args));
(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 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
extern struct vnode *rootvp;
int iso_bsize;
int iso_blknum;
int joliet_level;
struct iso_volume_descriptor *vdp;
struct iso_primary_descriptor *pri = NULL;
struct iso_supplementary_descriptor *sup = NULL;
struct iso_directory_record *rootp;
int logical_block_size;
int sess;
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)) != 0)
return (error);
if (vcount(devvp) > 1 && devvp != rootvp)
return (EBUSY);
if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
return (error);
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, 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;
if (argp->flags & ISOFSMNT_SESS) {
sess = argp->sess;
if (sess < 0)
sess = 0;
} else {
sess = 0;
error = VOP_IOCTL(devvp, CDIOREADMSADDR, (caddr_t)&sess, 0,
FSCRED, p);
if (error)
sess = 0;
}
joliet_level = 0;
for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
if ((error = bread(devvp,
(iso_blknum + sess) * 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) {
error = EINVAL;
goto out;
}
switch (isonum_711 (vdp->type)){
case ISO_VD_PRIMARY:
if (pribp == NULL) {
pribp = bp;
bp = NULL;
pri = (struct iso_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 (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 *)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 (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->joliet_level = 0;
/*
* Since an ISO9660 multi-session CD can also access previous sessions,
* we have to include them into the space considerations.
*/
isomp->volume_space_size += sess;
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] = (long)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;
/* Check the Rock Ridge Extension 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);
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;
}
/* Decide whether to use the Joliet descriptor */
if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
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;
}
devvp->v_specmountpoint = mp;
return (0);
out:
if (bp)
brelse(bp);
if (supbp)
brelse(supbp);
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);
}
/*
* Test to see if the device is an ISOFS filesystem.
*/
int
iso_disklabelspoof(dev, strat, lp)
dev_t dev;
void (*strat)(struct buf *);
register struct disklabel *lp;
{
struct buf *bp = NULL;
struct iso_volume_descriptor *vdp;
struct iso_primary_descriptor *pri;
int logical_block_size;
int error = EINVAL;
int iso_blknum;
int i;
bp = geteblk(ISO_DEFAULT_BLOCK_SIZE);
bp->b_dev = dev;
for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
bp->b_blkno = iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE);
bp->b_bcount = ISO_DEFAULT_BLOCK_SIZE;
bp->b_flags = B_BUSY | B_READ;
bp->b_cylinder = bp->b_blkno / lp->d_secpercyl;
/*printf("d_secsize %d iso_blknum %d b_blkno %d bcount %d\n",
lp->d_secsize, iso_blknum, bp->b_blkno, bp->b_bcount);*/
(*strat)(bp);
if (biowait(bp))
goto out;
vdp = (struct iso_volume_descriptor *)bp->b_data;
/*printf("%2x%2x%2x type %2x\n", vdp->id[0], vdp->id[1],
vdp->id[2], isonum_711(vdp->type));*/
if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0 ||
isonum_711 (vdp->type) == ISO_VD_END)
goto out;
if (isonum_711 (vdp->type) == ISO_VD_PRIMARY)
break;
}
if (isonum_711 (vdp->type) != ISO_VD_PRIMARY)
goto out;
pri = (struct iso_primary_descriptor *)vdp;
logical_block_size = isonum_723 (pri->logical_block_size);
if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE ||
(logical_block_size & (logical_block_size - 1)) != 0)
goto out;
/*
* build a disklabel for the CD
*/
strncpy(lp->d_typename, pri->volume_id, sizeof lp->d_typename);
strncpy(lp->d_packname, pri->volume_id+16, sizeof lp->d_packname);
for (i = 0; i < MAXPARTITIONS; i++) {
DL_SETPSIZE(&lp->d_partitions[i], 0);
DL_SETPOFFSET(&lp->d_partitions[i], 0);
}
DL_SETPOFFSET(&lp->d_partitions[0], 0);
DL_SETPSIZE(&lp->d_partitions[0], DL_GETDSIZE(lp));
lp->d_partitions[0].p_fstype = FS_ISO9660;
DL_SETPOFFSET(&lp->d_partitions[RAW_PART], 0);
DL_SETPSIZE(&lp->d_partitions[RAW_PART], DL_GETDSIZE(lp));
lp->d_partitions[RAW_PART].p_fstype = FS_ISO9660;
lp->d_npartitions = RAW_PART + 1;
lp->d_bbsize = 8192; /* fake */
lp->d_sbsize = 64*1024; /* fake */
lp->d_version = 1;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
error = 0;
out:
bp->b_flags |= B_INVAL;
brelse(bp);
return (error);
}
/*
* Make a filesystem operational.
* Nothing to do at the moment.
*/
/* ARGSUSED */
int
cd9660_start(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
return (0);
}
/*
* unmount system call
*/
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)) != 0)
return (error);
isomp = VFSTOISOFS(mp);
#ifdef ISODEVMAP
if (isomp->iso_ftype == ISO_FTYPE_RRIP)
iso_dunmap(isomp->im_dev);
#endif
isomp->im_devvp->v_specmountpoint = 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
*/
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));
}
/*
* Do operations associated with quotas, not supported
*/
/* ARGSUSED */
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_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(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname,
MNAMELEN);
bcopy(&mp->mnt_stat.mount_info.iso_args,
&sbp->mount_info.iso_args, sizeof(struct iso_args));
}
/* Use the first spare for flags: */
sbp->f_spare[0] = isomp->im_flags;
return (0);
}
/* ARGSUSED */
int
cd9660_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
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_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
NULL));
}
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;
{
register struct iso_mnt *imp;
struct iso_node *ip;
struct buf *bp;
struct vnode *vp, *nvp;
dev_t dev;
int error;
retry:
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);
bzero((caddr_t)ip, sizeof(struct iso_node));
lockinit(&ip->i_lock, PINOD, "isoinode", 0, 0);
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.
*/
error = cd9660_ihashins(ip);
if (error) {
vrele(vp);
if (error == EEXIST)
goto retry;
return (error);
}
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_bufatoff(ip, (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 = (u_int32_t) 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_bufatoff(ip, (off_t)-(off << imp->im_bshift),
NULL, &bp2);
else
bp2 = NULL;
cd9660_defattr(isodir, ip, bp2);
cd9660_deftstamp(isodir, ip, bp2);
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:
#ifdef FIFO
vp->v_op = cd9660_fifoop_p;
break;
#else
vput(vp);
return (EOPNOTSUPP);
#endif /* FIFO */
case VCHR:
case VBLK:
/*
* if device, look at device number table for translation
*/
#ifdef ISODEVMAP
if (dp = iso_dmap(dev, ino, 0))
ip->inode.iso_rdev = dp->d_dev;
#endif
vp->v_op = cd9660_specop_p;
if ((nvp = checkalias(vp, ip->inode.iso_rdev, mp)) != NULL) {
/*
* Discard unneeded vnode, but save its iso_node.
* Note that the lock is carried over in the iso_node
*/
nvp->v_data = vp->v_data;
vp->v_data = NULL;
vp->v_op = spec_vnodeop_p;
vrele(vp);
vgone(vp);
/*
* Reinitialize aliased inode.
*/
vp = nvp;
ip->i_vnode = vp;
}
break;
case VLNK:
case VNON:
case VSOCK:
case VDIR:
case VBAD:
break;
case VREG:
uvm_vnp_setsize(vp, ip->i_size);
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);
}
/*
* Verify a remote client has export rights and return these rights via
* exflagsp and credanonp.
*/
int
cd9660_check_export(mp, nam, exflagsp, credanonp)
register struct mount *mp;
struct mbuf *nam;
int *exflagsp;
struct ucred **credanonp;
{
register struct netcred *np;
register struct iso_mnt *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);
}
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