Source to bsd/isofs/cd9660/cd9660_vnops.c
/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @[email protected]
*
* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
* Reserved. This file contains Original Code and/or Modifications of
* Original Code as defined in and that are subject to the Apple Public
* Source License Version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. Please obtain a copy of the
* License at http://www.apple.com/publicsource and read it before using
* this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License."
*
* @[email protected]
*/
/* $NetBSD: cd9660_vnops.c,v 1.22 1994/12/27 19:05:12 mycroft 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 ([email protected]). The Rock Ridge Extension
* Support code is derived from software contributed to Berkeley
* by Atsushi Murai ([email protected]).
*
* 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_vnops.c 8.15 (Berkeley) 12/5/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <sys/malloc.h>
#include <sys/dir.h>
#include <sys/attr.h>
#include <vfs/vfs_support.h>
#include <sys/lock.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_node.h>
#include <isofs/cd9660/iso_rrip.h>
#if 0
/*
* Mknod vnode call
* Actually remap the device number
*/
cd9660_mknod(ndp, vap, cred, p)
struct nameidata *ndp;
struct ucred *cred;
struct vattr *vap;
struct proc *p;
{
#ifndef ISODEVMAP
FREE_ZONE(ndp->ni_pnbuf, ndp->ni_pnlen, M_NAMEI);
vput(ndp->ni_dvp);
vput(ndp->ni_vp);
return (EINVAL);
#else
register struct vnode *vp;
struct iso_node *ip;
struct iso_dnode *dp;
int error;
vp = ndp->ni_vp;
ip = VTOI(vp);
if (ip->i_mnt->iso_ftype != ISO_FTYPE_RRIP
|| vap->va_type != vp->v_type
|| (vap->va_type != VCHR && vap->va_type != VBLK)) {
FREE_ZONE(ndp->ni_pnbuf, ndp->ni_pnlen, M_NAMEI);
vput(ndp->ni_dvp);
vput(ndp->ni_vp);
return (EINVAL);
}
dp = iso_dmap(ip->i_dev,ip->i_number,1);
if (ip->inode.iso_rdev == vap->va_rdev || vap->va_rdev == VNOVAL) {
/* same as the unmapped one, delete the mapping */
remque(dp);
FREE(dp,M_CACHE);
} else
/* enter new mapping */
dp->d_dev = vap->va_rdev;
/*
* Remove inode so that it will be reloaded by iget and
* checked to see if it is an alias of an existing entry
* in the inode cache.
*/
vput(vp);
vp->v_type = VNON;
vgone(vp);
return (0);
#endif
}
#endif
/*
* Open called.
*
* Nothing to do.
*/
/* ARGSUSED */
int
cd9660_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
return (0);
}
/*
* Close called
*
* Update the times on the inode on writeable file systems.
*/
/* ARGSUSED */
int
cd9660_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
return (0);
}
/*
* Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
* The mode is shifted to select the owner/group/other fields. The
* super user is granted all permissions.
*/
/* ARGSUSED */
int
cd9660_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct iso_node *ip = VTOI(vp);
struct ucred *cred = ap->a_cred;
mode_t mask, mode = ap->a_mode;
register gid_t *gp;
int i, error;
/*
* Disallow write attempts on read-only file systems;
* unless the file is a socket, fifo, or a block or
* character device resident on the file system.
*/
if (mode & VWRITE) {
switch (vp->v_type) {
case VDIR:
case VLNK:
case VREG:
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
#if QUOTA
if ( (error = getinoquota(ip)) )
return (error);
#endif
break;
default:
break;
}
}
/* If immutable bit set, nobody gets to write it. */
if ((mode & VWRITE) && (ip->i_flag & IMMUTABLE))
return (EPERM);
/* Otherwise, user id 0 always gets access. */
if (cred->cr_uid == 0)
return (0);
mask = 0;
/* Otherwise, check the owner. */
if (cred->cr_uid == ip->inode.iso_uid) {
if (mode & VEXEC)
mask |= S_IXUSR;
if (mode & VREAD)
mask |= S_IRUSR;
if (mode & VWRITE)
mask |= S_IWUSR;
return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
}
/* Otherwise, check the groups. */
for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
if (ip->inode.iso_gid == *gp) {
if (mode & VEXEC)
mask |= S_IXGRP;
if (mode & VREAD)
mask |= S_IRGRP;
if (mode & VWRITE)
mask |= S_IWGRP;
return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
}
/* Otherwise, check everyone else. */
if (mode & VEXEC)
mask |= S_IXOTH;
if (mode & VREAD)
mask |= S_IROTH;
if (mode & VWRITE)
mask |= S_IWOTH;
return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES);
}
int
cd9660_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
register struct vattr *vap = ap->a_vap;
register struct iso_node *ip = VTOI(vp);
vap->va_fsid = ip->i_dev;
vap->va_fileid = ip->i_number;
vap->va_mode = ip->inode.iso_mode;
vap->va_nlink = ip->inode.iso_links;
vap->va_uid = ip->inode.iso_uid;
vap->va_gid = ip->inode.iso_gid;
vap->va_atime = ip->inode.iso_atime;
vap->va_mtime = ip->inode.iso_mtime;
vap->va_ctime = ip->inode.iso_ctime;
vap->va_rdev = ip->inode.iso_rdev;
vap->va_size = (u_quad_t) ip->i_size;
if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) {
struct vop_readlink_args rdlnk;
struct iovec aiov;
struct uio auio;
char *cp;
MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK);
aiov.iov_base = cp;
aiov.iov_len = MAXPATHLEN;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_offset = 0;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = ap->a_p;
auio.uio_resid = MAXPATHLEN;
rdlnk.a_uio = &auio;
rdlnk.a_vp = ap->a_vp;
rdlnk.a_cred = ap->a_cred;
if (cd9660_readlink(&rdlnk) == 0)
vap->va_size = MAXPATHLEN - auio.uio_resid;
FREE(cp, M_TEMP);
}
vap->va_flags = 0;
vap->va_gen = 1;
vap->va_blocksize = ip->i_mnt->logical_block_size;
vap->va_bytes = (u_quad_t) ip->i_size;
vap->va_type = vp->v_type;
return (0);
}
#if ISO_DEFAULT_BLOCK_SIZE >= NBPG
#ifdef DEBUG
extern int doclusterread;
#else
#define doclusterread 1
#endif
#else
/* XXX until cluster routines can handle block sizes less than one page */
#define doclusterread 0
#endif
/*
* Vnode op for reading.
*/
int
cd9660_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
register struct uio *uio = ap->a_uio;
register struct iso_node *ip = VTOI(vp);
register struct iso_mnt *imp;
struct buf *bp;
daddr_t lbn, rablock;
off_t diff;
int rasize, error = 0;
long size, n, on;
#ifdef NeXT
int firstpass;
int seq;
int devBlockSize;
#endif /* NeXT */
if (uio->uio_resid == 0)
return (0);
if (uio->uio_offset < 0)
return (EINVAL);
ip->i_flag |= IN_ACCESS;
imp = ip->i_mnt;
#ifdef NeXT
firstpass=TRUE;
VOP_DEVBLOCKSIZE(ip->i_devvp, &devBlockSize);
#endif /* NeXT */
do {
lbn = lblkno(imp, uio->uio_offset);
on = blkoff(imp, uio->uio_offset);
n = min((u_int)(imp->logical_block_size - on),
uio->uio_resid);
diff = (off_t)ip->i_size - uio->uio_offset;
if (diff <= 0)
return (0);
if (diff < n)
n = diff;
size = blksize(imp, ip, lbn);
rablock = lbn + 1;
if (doclusterread) {
if (lblktosize(imp, rablock) <= ip->i_size)
#ifdef NeXT
error = cluster_read(vp, (off_t)ip->i_size,
lbn, size, NOCRED, &bp, devBlockSize,
firstpass, (uio->uio_resid + on), &seq);
#else
error = cluster_read(vp, (off_t)ip->i_size,
lbn, size, NOCRED, &bp);
#endif /* NeXT */
else
error = bread(vp, lbn, size, NOCRED, &bp);
} else {
if (vp->v_lastr + 1 == lbn &&
lblktosize(imp, rablock) < ip->i_size) {
rasize = blksize(imp, ip, rablock);
error = breadn(vp, lbn, size, &rablock,
&rasize, 1, NOCRED, &bp);
} else
error = bread(vp, lbn, size, NOCRED, &bp);
}
vp->v_lastr = lbn;
n = min(n, size - bp->b_resid);
if (error) {
brelse(bp);
return (error);
}
error = uiomove(bp->b_data + on, (int)n, uio);
if (n + on == imp->logical_block_size ||
uio->uio_offset == (off_t)ip->i_size)
bp->b_flags |= B_AGE;
brelse(bp);
firstpass = FALSE;
} while (error == 0 && uio->uio_resid > 0 && n != 0);
return (error);
}
/* ARGSUSED */
int
cd9660_ioctl(ap)
struct vop_ioctl_args /* {
struct vnode *a_vp;
u_long a_command;
caddr_t a_data;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
printf("You did ioctl for isofs !!\n");
return (ENOTTY);
}
/* ARGSUSED */
int
cd9660_select(ap)
struct vop_select_args /* {
struct vnode *a_vp;
int a_which;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
/*
* We should really check to see if I/O is possible.
*/
return (1);
}
/*
* Mmap a file
*
* NB Currently unsupported.
*/
/* ARGSUSED */
int
cd9660_mmap(ap)
struct vop_mmap_args /* {
struct vnode *a_vp;
int a_fflags;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
return (EINVAL);
}
/*
* Seek on a file
*
* Nothing to do, so just return.
*/
/* ARGSUSED */
int
cd9660_seek(ap)
struct vop_seek_args /* {
struct vnode *a_vp;
off_t a_oldoff;
off_t a_newoff;
struct ucred *a_cred;
} */ *ap;
{
return (0);
}
/*
* Structure for reading directories
*/
struct isoreaddir {
struct dirent saveent;
struct dirent assocent;
struct dirent current;
off_t saveoff;
off_t assocoff;
off_t curroff;
struct uio *uio;
off_t uio_off;
int eofflag;
// u_long **cookies;
// int *ncookies;
};
int
iso_uiodir(idp,dp,off)
struct isoreaddir *idp;
struct dirent *dp;
off_t off;
{
int error;
dp->d_name[dp->d_namlen] = 0;
dp->d_reclen = DIRSIZ(dp);
if (idp->uio->uio_resid < dp->d_reclen) {
idp->eofflag = 0;
return (-1);
}
#if 0
if (idp->cookies) {
if (*idp->ncookies <= 0) {
idp->eofflag = 0;
return (-1);
}
**idp->cookies++ = off;
--*idp->ncookies;
}
#endif
if ( (error = uiomove( (caddr_t)dp, dp->d_reclen, idp->uio )) )
return (error);
idp->uio_off = off;
return (0);
}
int
iso_shipdir(idp)
struct isoreaddir *idp;
{
struct dirent *dp;
int cl, sl, assoc;
int error;
char *cname, *sname;
cl = idp->current.d_namlen;
cname = idp->current.d_name;
assoc = (cl > 1) && (*cname == ASSOCCHAR );
if (assoc) {
cl--;
cname++;
}
dp = &idp->saveent;
sname = dp->d_name;
if (!(sl = dp->d_namlen)) {
dp = &idp->assocent;
sname = dp->d_name + 1;
sl = dp->d_namlen - 1;
}
if (sl > 0) {
if (sl != cl
|| bcmp(sname,cname,sl)) {
if (idp->assocent.d_namlen) {
if ( (error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) )
return (error);
idp->assocent.d_namlen = 0;
}
if (idp->saveent.d_namlen) {
if ( (error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) )
return (error);
idp->saveent.d_namlen = 0;
}
}
}
idp->current.d_reclen = DIRSIZ(&idp->current);
if (assoc) {
idp->assocoff = idp->curroff;
bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
} else {
idp->saveoff = idp->curroff;
bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
}
return (0);
}
/*
* Vnode op for readdir
*/
int
cd9660_readdir(ap)
struct vop_readdir_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_eofflag;
int *a_ncookies;
u_long **a_cookies;
} */ *ap;
{
register struct uio *uio = ap->a_uio;
off_t startingOffset = uio->uio_offset;
size_t lost = 0;
struct isoreaddir *idp;
struct vnode *vdp = ap->a_vp;
struct iso_node *dp;
struct iso_mnt *imp;
struct buf *bp = NULL;
struct iso_directory_record *ep;
int entryoffsetinblock;
doff_t endsearch;
u_long bmask;
int error = 0;
int reclen;
u_short namelen;
dp = VTOI(vdp);
imp = dp->i_mnt;
bmask = imp->im_bmask;
MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK);
idp->saveent.d_namlen = idp->assocent.d_namlen = 0;
/*
* XXX
* Is it worth trying to figure out the type?
*/
idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type =
DT_UNKNOWN;
idp->uio = uio;
idp->eofflag = 1;
idp->curroff = uio->uio_offset;
if ((entryoffsetinblock = idp->curroff & bmask) &&
(error = VOP_BLKATOFF(vdp, (off_t)idp->curroff, NULL, &bp))) {
FREE(idp, M_TEMP);
return (error);
}
endsearch = dp->i_size;
while (idp->curroff < endsearch) {
/*
* If offset is on a block boundary,
* read the next directory block.
* Release previous if it exists.
*/
if ((idp->curroff & bmask) == 0) {
if (bp != NULL)
brelse(bp);
if ( (error = VOP_BLKATOFF(vdp, (off_t)idp->curroff, NULL, &bp)) )
break;
entryoffsetinblock = 0;
}
/*
* Get pointer to next entry.
*/
ep = (struct iso_directory_record *)
((char *)bp->b_data + entryoffsetinblock);
reclen = isonum_711(ep->length);
if (reclen == 0) {
/* skip to next block, if any */
idp->curroff =
(idp->curroff & ~bmask) + imp->logical_block_size;
continue;
}
if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
error = EINVAL;
/* illegal entry, stop */
break;
}
if (entryoffsetinblock + reclen > imp->logical_block_size) {
error = EINVAL;
/* illegal directory, so stop looking */
break;
}
idp->current.d_namlen = isonum_711(ep->name_len);
if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
error = EINVAL;
/* illegal entry, stop */
break;
}
if ( isonum_711(ep->flags) & directoryBit )
idp->current.d_fileno = isodirino(ep, imp);
else
{
idp->current.d_fileno = (bp->b_blkno << imp->im_bshift) + entryoffsetinblock;
}
idp->curroff += reclen;
switch (imp->iso_ftype) {
case ISO_FTYPE_RRIP:
cd9660_rrip_getname(ep,idp->current.d_name, &namelen,
&idp->current.d_fileno,imp);
idp->current.d_namlen = (u_char)namelen;
if (idp->current.d_namlen)
error = iso_uiodir(idp,&idp->current,idp->curroff);
break;
default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */
strcpy(idp->current.d_name,"..");
switch (ep->name[0]) {
case 0:
idp->current.d_namlen = 1;
error = iso_uiodir(idp,&idp->current,idp->curroff);
break;
case 1:
idp->current.d_namlen = 2;
error = iso_uiodir(idp,&idp->current,idp->curroff);
break;
default:
isofntrans(ep->name,idp->current.d_namlen,
idp->current.d_name, &namelen,
imp->iso_ftype == ISO_FTYPE_9660,
isonum_711(ep->flags) & associatedBit);
idp->current.d_namlen = (u_char)namelen;
if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
error = iso_shipdir(idp);
else
error = iso_uiodir(idp,&idp->current,idp->curroff);
break;
}
}
if (error)
break;
entryoffsetinblock += reclen;
}
if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
idp->current.d_namlen = 0;
error = iso_shipdir(idp);
}
if (!error && ap->a_ncookies) {
struct dirent *dp, *dpstart;
off_t bufferOffset;
u_long *cookies;
int ncookies;
/*
* Only the NFS server uses cookies, and it loads the
* directory block into system space, so we can just look at
* it directly.
*
* We assume the entire transfer is done to a single contiguous buffer.
*/
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("ufs_readdir: lost in space");
/*
* Make a first pass over the buffer just generated,
* counting the number of entries:
*/
dpstart = (struct dirent *) (uio->uio_iov->iov_base - (uio->uio_offset - startingOffset));
for (dp = dpstart, bufferOffset = startingOffset, ncookies = 0;
bufferOffset < uio->uio_offset; ) {
if (dp->d_reclen == 0)
break;
bufferOffset += dp->d_reclen;
ncookies++;
dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
}
lost += uio->uio_offset - bufferOffset;
uio->uio_offset = bufferOffset;
/*
* Allocate a buffer to hold the cookies requested:
*/
MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, M_WAITOK);
*ap->a_ncookies = ncookies;
*ap->a_cookies = cookies;
/*
* Fill in the offsets for each entry in the buffer just allocated:
*/
for (bufferOffset = startingOffset, dp = dpstart; bufferOffset < uio->uio_offset; ) {
*(cookies++) = bufferOffset;
bufferOffset += dp->d_reclen;
dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
}
}
if (error < 0)
error = 0;
if (bp)
brelse (bp);
uio->uio_offset = idp->uio_off;
*ap->a_eofflag = idp->eofflag;
FREE(idp, M_TEMP);
return (error);
}
/*
* Return target name of a symbolic link
* Shouldn't we get the parent vnode and read the data from there?
* This could eventually result in deadlocks in cd9660_lookup.
* But otherwise the block read here is in the block buffer two times.
*/
typedef struct iso_directory_record ISODIR;
typedef struct iso_node ISONODE;
typedef struct iso_mnt ISOMNT;
int
cd9660_readlink(ap)
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
ISONODE *ip;
ISODIR *dirp;
ISOMNT *imp;
struct buf *bp;
struct uio *uio;
u_short symlen;
int error;
char *symname;
ip = VTOI(ap->a_vp);
imp = ip->i_mnt;
uio = ap->a_uio;
if (imp->iso_ftype != ISO_FTYPE_RRIP)
return (EINVAL);
/*
* Get parents directory record block that this inode included.
*/
error = bread(imp->im_devvp,
(ip->i_number >> imp->im_bshift),
imp->logical_block_size, NOCRED, &bp);
if (error) {
brelse(bp);
return (EINVAL);
}
/*
* Setup the directory pointer for this inode
*/
dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask));
/*
* Just make sure, we have a right one....
* 1: Check not cross boundary on block
*/
if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
> imp->logical_block_size) {
brelse(bp);
return (EINVAL);
}
/*
* Now get a buffer
* Abuse a namei buffer for now.
*/
if (uio->uio_segflg == UIO_SYSSPACE)
symname = uio->uio_iov->iov_base;
else
MALLOC_ZONE(symname, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
/*
* Ok, we just gathering a symbolic name in SL record.
*/
if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) {
if (uio->uio_segflg != UIO_SYSSPACE)
FREE_ZONE(symname, MAXPATHLEN, M_NAMEI);
brelse(bp);
return (EINVAL);
}
/*
* Don't forget before you leave from home ;-)
*/
brelse(bp);
/*
* return with the symbolic name to caller's.
*/
if (uio->uio_segflg != UIO_SYSSPACE) {
error = uiomove(symname, symlen, uio);
FREE_ZONE(symname, MAXPATHLEN, M_NAMEI);
return (error);
}
uio->uio_resid -= symlen;
uio->uio_iov->iov_base += symlen;
uio->uio_iov->iov_len -= symlen;
return (0);
}
/*
* Ufs abort op, called after namei() when a CREATE/DELETE isn't actually
* done. If a buffer has been saved in anticipation of a CREATE, delete it.
*/
int
cd9660_abortop(ap)
struct vop_abortop_args /* {
struct vnode *a_dvp;
struct componentname *a_cnp;
} */ *ap;
{
if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
FREE_ZONE(ap->a_cnp->cn_pnbuf, ap->a_cnp->cn_pnlen, M_NAMEI);
return (0);
}
/*
* Lock an inode.
*/
int
cd9660_lock(ap)
struct vop_lock_args /* {
struct vnode *a_vp;
int a_flags;
struct proc *a_p;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
if (VTOI(vp) == (struct inode *) NULL)
panic ("cd9660 inode in vnode is null\n");
return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, &vp->v_interlock,ap->a_p));
}
/*
* Unlock an inode.
*/
int
cd9660_unlock(ap)
struct vop_unlock_args /* {
struct vnode *a_vp;
int a_flags;
struct proc *a_p;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock,ap->a_p));
}
/*
* Calculate the logical to physical mapping if not done already,
* then call the device strategy routine.
*/
int
cd9660_strategy(ap)
struct vop_strategy_args /* {
struct buf *a_bp;
} */ *ap;
{
register struct buf *bp = ap->a_bp;
register struct vnode *vp = bp->b_vp;
register struct iso_node *ip;
int error;
ip = VTOI(vp);
if (vp->v_type == VBLK || vp->v_type == VCHR)
panic("cd9660_strategy: spec");
if (bp->b_blkno == bp->b_lblkno) {
if ( (error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL)) ) {
bp->b_error = error;
bp->b_flags |= B_ERROR;
biodone(bp);
return (error);
}
if ((long)bp->b_blkno == -1)
clrbuf(bp);
}
if ((long)bp->b_blkno == -1) {
biodone(bp);
return (0);
}
vp = ip->i_devvp;
bp->b_dev = vp->v_rdev;
VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
return (0);
}
/*
* Print out the contents of an inode.
*/
int
cd9660_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
printf("tag VT_ISOFS, isofs vnode\n");
return (0);
}
/*
* Check for a locked inode.
*/
int
cd9660_islocked(ap)
struct vop_islocked_args /* {
struct vnode *a_vp;
} */ *ap;
{
return (lockstatus(&VTOI(ap->a_vp)->i_lock));
}
/*
* Return POSIX pathconf information applicable to cd9660 filesystems.
*/
int
cd9660_pathconf(ap)
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap;
{
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = 1;
return (0);
case _PC_NAME_MAX:
if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP)
*ap->a_retval = NAME_MAX;
else
*ap->a_retval = 37;
return (0);
case _PC_PATH_MAX:
*ap->a_retval = PATH_MAX;
return (0);
case _PC_PIPE_BUF:
*ap->a_retval = PIPE_BUF;
return (0);
case _PC_CHOWN_RESTRICTED:
*ap->a_retval = 1;
return (0);
case _PC_NO_TRUNC:
*ap->a_retval = 1;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
/*
* Unsupported operation
*/
int
cd9660_enotsupp()
{
return (EOPNOTSUPP);
}
/* Pagein */
int
cd9660_pagein(ap)
struct vop_pagein_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
/* pass thru to read */
return (VOP_READ(ap->a_vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
}
/* Pageout */
int
cd9660_pageout(ap)
struct vop_pageout_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
/* pass thru to write */
return (VOP_WRITE(ap->a_vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
}
/*
* cd9660_remove - not possible to remove a file from iso cds
*
* Locking policy: a_dvp and vp locked on entry, unlocked on exit
*/
int
cd9660_remove(ap)
struct vop_remove_args /* { struct vnode *a_dvp; struct vnode *a_vp;
struct componentname *a_cnp; } */ *ap;
{
if (ap->a_dvp == ap->a_vp)
vrele(ap->a_vp);
else
vput(ap->a_vp);
vput(ap->a_dvp);
return (EROFS);
}
/*
* cd9660_rmdir - not possible to remove a directory from iso cds
*
* Locking policy: a_dvp and vp locked on entry, unlocked on exit
*/
int
cd9660_rmdir(ap)
struct vop_rmdir_args /* { struct vnode *a_dvp; struct vnode *a_vp;
struct componentname *a_cnp; } */ *ap;
{
(void) nop_rmdir(ap);
return (EROFS);
}
/*
#
#% getattrlist vp = = =
#
vop_getattrlist {
IN struct vnode *vp;
IN struct attrlist *alist;
INOUT struct uio *uio;
IN struct ucred *cred;
IN struct proc *p;
};
*/
int
cd9660_getattrlist(ap)
struct vop_getattrlist_args /* {
struct vnode *a_vp;
struct attrlist *a_alist
struct uio *a_uio;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
struct attrlist *alist = ap->a_alist;
int fixedblocksize;
int attrblocksize;
int attrbufsize;
void *attrbufptr;
void *attrptr;
void *varptr;
int error = 0;
if ((alist->bitmapcount != ATTR_BIT_MAP_COUNT) ||
((alist->commonattr & ~ATTR_CMN_VALIDMASK) != 0) ||
((alist->volattr & ~ATTR_VOL_VALIDMASK) != 0) ||
((alist->dirattr & ~ATTR_DIR_VALIDMASK) != 0) ||
((alist->fileattr & ~ATTR_FILE_VALIDMASK) != 0) ||
((alist->forkattr & ~ATTR_FORK_VALIDMASK) != 0)) {
return EINVAL;
};
/*
* Requesting volume information requires setting the ATTR_VOL_INFO bit and
* volume info requests are mutually exclusive with all other info requests:
*/
if ((alist->volattr != 0) &&
(((alist->volattr & ATTR_VOL_INFO) == 0) ||
(alist->dirattr != 0) ||
(alist->fileattr != 0) ||
(alist->forkattr != 0) )) {
return EINVAL;
};
/*
* Reject requests for unsupported options for now:
*/
if (alist->volattr & ATTR_VOL_MOUNTPOINT) return EINVAL;
if (alist->commonattr & (ATTR_CMN_NAMEDATTRCOUNT | ATTR_CMN_NAMEDATTRLIST)) return EINVAL;
if (alist->fileattr &
(ATTR_FILE_FILETYPE |
ATTR_FILE_FORKCOUNT |
ATTR_FILE_FORKLIST |
ATTR_FILE_DATAEXTENTS |
ATTR_FILE_RSRCEXTENTS)) {
return EINVAL;
};
fixedblocksize = attrcalcsize(alist);
attrblocksize = fixedblocksize + (sizeof(u_long)); /* u_long for length longword */
if (alist->commonattr & ATTR_CMN_NAME) attrblocksize += NAME_MAX;
if (alist->commonattr & ATTR_CMN_NAMEDATTRLIST) attrblocksize += 0; /* XXX PPD */
if (alist->volattr & ATTR_VOL_MOUNTPOINT) attrblocksize += PATH_MAX;
if (alist->volattr & ATTR_VOL_NAME) attrblocksize += NAME_MAX;
if (alist->fileattr & ATTR_FILE_FORKLIST) attrblocksize += 0; /* XXX PPD */
attrbufsize = MIN(ap->a_uio->uio_resid, attrblocksize);
MALLOC(attrbufptr, void *, attrblocksize, M_TEMP, M_WAITOK);
attrptr = attrbufptr;
*((u_long *)attrptr) = 0; /* Set buffer length in case of errors */
++((u_long *)attrptr); /* Reserve space for length field */
varptr = ((char *)attrptr) + fixedblocksize; /* Point to variable-length storage */
packattrblk(alist, ap->a_vp, &attrptr, &varptr);
*((u_long *)attrbufptr) = (varptr - attrbufptr); /* Store length of fixed + var block */
attrbufsize = MIN(attrbufsize, varptr - attrbufptr); /* Don't copy out more data than was generated */
error = uiomove((caddr_t)attrbufptr, attrbufsize, ap->a_uio);
FREE(attrbufptr, M_TEMP);
return error;
}
/*
* Global vfs data structures for isofs
*/
#define cd9660_create \
((int (*) __P((struct vop_create_args *)))err_create)
#define cd9660_mknod ((int (*) __P((struct vop_mknod_args *)))err_mknod)
#define cd9660_setattr \
((int (*) __P((struct vop_setattr_args *)))cd9660_enotsupp)
#define cd9660_write ((int (*) __P((struct vop_write_args *)))cd9660_enotsupp)
#ifdef NFSSERVER
int lease_check __P((struct vop_lease_args *));
#define cd9660_lease_check lease_check
#else
#define cd9660_lease_check ((int (*) __P((struct vop_lease_args *)))nullop)
#endif
#define cd9660_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
#define cd9660_rename \
((int (*) __P((struct vop_rename_args *)))err_rename)
#define cd9660_link ((int (*) __P((struct vop_link_args *)))err_link)
#define cd9660_mkdir ((int (*) __P((struct vop_mkdir_args *)))err_mkdir)
#define cd9660_symlink \
((int (*) __P((struct vop_symlink_args *)))err_symlink)
#define cd9660_advlock \
((int (*) __P((struct vop_advlock_args *)))cd9660_enotsupp)
#define cd9660_valloc ((int(*) __P(( \
struct vnode *pvp, \
int mode, \
struct ucred *cred, \
struct vnode **vpp))) cd9660_enotsupp)
#define cd9660_vfree ((int (*) __P((struct vop_vfree_args *)))cd9660_enotsupp)
#define cd9660_truncate \
((int (*) __P((struct vop_truncate_args *)))cd9660_enotsupp)
#define cd9660_update \
((int (*) __P((struct vop_update_args *)))cd9660_enotsupp)
#define cd9660_bwrite \
((int (*) __P((struct vop_bwrite_args *)))cd9660_enotsupp)
/*
* Global vfs data structures for cd9660
*/
int (**cd9660_vnodeop_p)();
struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, cd9660_lookup }, /* lookup */
{ &vop_create_desc, cd9660_create }, /* create */
{ &vop_mknod_desc, cd9660_mknod }, /* mknod */
{ &vop_open_desc, cd9660_open }, /* open */
{ &vop_close_desc, cd9660_close }, /* close */
{ &vop_access_desc, cd9660_access }, /* access */
{ &vop_getattr_desc, cd9660_getattr }, /* getattr */
{ &vop_setattr_desc, cd9660_setattr }, /* setattr */
{ &vop_read_desc, cd9660_read }, /* read */
{ &vop_write_desc, cd9660_write }, /* write */
{ &vop_lease_desc, cd9660_lease_check },/* lease */
{ &vop_ioctl_desc, cd9660_ioctl }, /* ioctl */
{ &vop_select_desc, cd9660_select }, /* select */
{ &vop_mmap_desc, cd9660_mmap }, /* mmap */
{ &vop_fsync_desc, cd9660_fsync }, /* fsync */
{ &vop_seek_desc, cd9660_seek }, /* seek */
{ &vop_remove_desc, cd9660_remove }, /* remove */
{ &vop_link_desc, cd9660_link }, /* link */
{ &vop_rename_desc, cd9660_rename }, /* rename */
{ &vop_mkdir_desc, cd9660_mkdir }, /* mkdir */
{ &vop_rmdir_desc, cd9660_rmdir }, /* rmdir */
{ &vop_symlink_desc, cd9660_symlink }, /* symlink */
{ &vop_readdir_desc, cd9660_readdir }, /* readdir */
{ &vop_readlink_desc, cd9660_readlink },/* readlink */
{ &vop_abortop_desc, cd9660_abortop }, /* abortop */
{ &vop_inactive_desc, cd9660_inactive },/* inactive */
{ &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */
{ &vop_lock_desc, cd9660_lock }, /* lock */
{ &vop_unlock_desc, cd9660_unlock }, /* unlock */
{ &vop_bmap_desc, cd9660_bmap }, /* bmap */
{ &vop_strategy_desc, cd9660_strategy },/* strategy */
{ &vop_print_desc, cd9660_print }, /* print */
{ &vop_islocked_desc, cd9660_islocked },/* islocked */
{ &vop_pathconf_desc, cd9660_pathconf },/* pathconf */
{ &vop_advlock_desc, cd9660_advlock }, /* advlock */
{ &vop_blkatoff_desc, cd9660_blkatoff },/* blkatoff */
{ &vop_valloc_desc, cd9660_valloc }, /* valloc */
{ &vop_vfree_desc, cd9660_vfree }, /* vfree */
{ &vop_truncate_desc, cd9660_truncate },/* truncate */
{ &vop_update_desc, cd9660_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
{ &vop_pagein_desc, cd9660_pagein }, /* Pagein */
{ &vop_pageout_desc, cd9660_pageout }, /* Pageout */
{ &vop_getattrlist_desc, cd9660_getattrlist }, /* getattrlist */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc cd9660_vnodeop_opv_desc =
{ &cd9660_vnodeop_p, cd9660_vnodeop_entries };
/*
* Special device vnode ops
*/
int (**cd9660_specop_p)();
struct vnodeopv_entry_desc cd9660_specop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, spec_lookup }, /* lookup */
{ &vop_create_desc, spec_create }, /* create */
{ &vop_mknod_desc, spec_mknod }, /* mknod */
{ &vop_open_desc, spec_open }, /* open */
{ &vop_close_desc, spec_close }, /* close */
{ &vop_access_desc, cd9660_access }, /* access */
{ &vop_getattr_desc, cd9660_getattr }, /* getattr */
{ &vop_setattr_desc, cd9660_setattr }, /* setattr */
{ &vop_read_desc, spec_read }, /* read */
{ &vop_write_desc, spec_write }, /* write */
{ &vop_lease_desc, spec_lease_check }, /* lease */
{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
{ &vop_select_desc, spec_select }, /* select */
{ &vop_mmap_desc, spec_mmap }, /* mmap */
{ &vop_fsync_desc, spec_fsync }, /* fsync */
{ &vop_seek_desc, spec_seek }, /* seek */
{ &vop_remove_desc, spec_remove }, /* remove */
{ &vop_link_desc, spec_link }, /* link */
{ &vop_rename_desc, spec_rename }, /* rename */
{ &vop_mkdir_desc, spec_mkdir }, /* mkdir */
{ &vop_rmdir_desc, spec_rmdir }, /* rmdir */
{ &vop_symlink_desc, spec_symlink }, /* symlink */
{ &vop_readdir_desc, spec_readdir }, /* readdir */
{ &vop_readlink_desc, spec_readlink }, /* readlink */
{ &vop_abortop_desc, spec_abortop }, /* abortop */
{ &vop_inactive_desc, cd9660_inactive },/* inactive */
{ &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */
{ &vop_lock_desc, cd9660_lock }, /* lock */
{ &vop_unlock_desc, cd9660_unlock }, /* unlock */
{ &vop_bmap_desc, spec_bmap }, /* bmap */
{ &vop_strategy_desc, spec_strategy }, /* strategy */
{ &vop_print_desc, cd9660_print }, /* print */
{ &vop_islocked_desc, cd9660_islocked },/* islocked */
{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
{ &vop_advlock_desc, spec_advlock }, /* advlock */
{ &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, spec_valloc }, /* valloc */
{ &vop_vfree_desc, spec_vfree }, /* vfree */
{ &vop_truncate_desc, spec_truncate }, /* truncate */
{ &vop_update_desc, cd9660_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
#ifdef NeXT
{ &vop_devblocksize_desc, spec_devblocksize }, /* devblocksize */
#endif /* NeXT */
{ &vop_pagein_desc, cd9660_pagein }, /* Pagein */
{ &vop_pageout_desc, cd9660_pageout }, /* Pageout */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc cd9660_specop_opv_desc =
{ &cd9660_specop_p, cd9660_specop_entries };
#ifdef FIFO
int (**cd9660_fifoop_p)();
struct vnodeopv_entry_desc cd9660_fifoop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, fifo_lookup }, /* lookup */
{ &vop_create_desc, fifo_create }, /* create */
{ &vop_mknod_desc, fifo_mknod }, /* mknod */
{ &vop_open_desc, fifo_open }, /* open */
{ &vop_close_desc, fifo_close }, /* close */
{ &vop_access_desc, cd9660_access }, /* access */
{ &vop_getattr_desc, cd9660_getattr }, /* getattr */
{ &vop_setattr_desc, cd9660_setattr }, /* setattr */
{ &vop_read_desc, fifo_read }, /* read */
{ &vop_write_desc, fifo_write }, /* write */
{ &vop_lease_desc, fifo_lease_check }, /* lease */
{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_select_desc, fifo_select }, /* select */
{ &vop_mmap_desc, fifo_mmap }, /* mmap */
{ &vop_fsync_desc, fifo_fsync }, /* fsync */
{ &vop_seek_desc, fifo_seek }, /* seek */
{ &vop_remove_desc, fifo_remove }, /* remove */
{ &vop_link_desc, fifo_link } , /* link */
{ &vop_rename_desc, fifo_rename }, /* rename */
{ &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
{ &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
{ &vop_symlink_desc, fifo_symlink }, /* symlink */
{ &vop_readdir_desc, fifo_readdir }, /* readdir */
{ &vop_readlink_desc, fifo_readlink }, /* readlink */
{ &vop_abortop_desc, fifo_abortop }, /* abortop */
{ &vop_inactive_desc, cd9660_inactive },/* inactive */
{ &vop_reclaim_desc, cd9660_reclaim }, /* reclaim */
{ &vop_lock_desc, cd9660_lock }, /* lock */
{ &vop_unlock_desc, cd9660_unlock }, /* unlock */
{ &vop_bmap_desc, fifo_bmap }, /* bmap */
{ &vop_strategy_desc, fifo_strategy }, /* strategy */
{ &vop_print_desc, cd9660_print }, /* print */
{ &vop_islocked_desc, cd9660_islocked },/* islocked */
{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
{ &vop_advlock_desc, fifo_advlock }, /* advlock */
{ &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, fifo_valloc }, /* valloc */
{ &vop_vfree_desc, fifo_vfree }, /* vfree */
{ &vop_truncate_desc, fifo_truncate }, /* truncate */
{ &vop_update_desc, cd9660_update }, /* update */
{ &vop_bwrite_desc, vn_bwrite },
{ &vop_pagein_desc, cd9660_pagein }, /* Pagein */
{ &vop_pageout_desc, cd9660_pageout }, /* Pageout */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc cd9660_fifoop_opv_desc =
{ &cd9660_fifoop_p, cd9660_fifoop_entries };
#endif /* FIFO */