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freebsd-skq/sys/isofs/cd9660/cd9660_node.c
bde 289f11acb4 Add and move declarations to fix all of the warnings from `gcc -Wimplicit' 
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00

657 lines
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/*-
* Copyright (c) 1982, 1986, 1989, 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_node.c 8.2 (Berkeley) 1/23/94
* $Id: cd9660_node.c,v 1.9 1995/02/21 18:41:30 bde Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_node.h>
#include <isofs/cd9660/iso_rrip.h>
#define INOHSZ 512
#if ((INOHSZ&(INOHSZ-1)) == 0)
#define INOHASH(dev,ino) (((dev)+((ino)>>12))&(INOHSZ-1))
#else
#define INOHASH(dev,ino) (((unsigned)((dev)+((ino)>>12)))%INOHSZ)
#endif
union iso_ihead {
union iso_ihead *ih_head[2];
struct iso_node *ih_chain[2];
} iso_ihead[INOHSZ];
#ifdef ISODEVMAP
#define DNOHSZ 64
#if ((DNOHSZ&(DNOHSZ-1)) == 0)
#define DNOHASH(dev,ino) (((dev)+((ino)>>12))&(DNOHSZ-1))
#else
#define DNOHASH(dev,ino) (((unsigned)((dev)+((ino)>>12)))%DNOHSZ)
#endif
union iso_dhead {
union iso_dhead *dh_head[2];
struct iso_dnode *dh_chain[2];
} iso_dhead[DNOHSZ];
#endif
/*
* Initialize hash links for inodes and dnodes.
*/
int
cd9660_init()
{
register int i;
register union iso_ihead *ih = iso_ihead;
#ifdef ISODEVMAP
register union iso_dhead *dh = iso_dhead;
#endif
for (i = INOHSZ; --i >= 0; ih++) {
ih->ih_head[0] = ih;
ih->ih_head[1] = ih;
}
#ifdef ISODEVMAP
for (i = DNOHSZ; --i >= 0; dh++) {
dh->dh_head[0] = dh;
dh->dh_head[1] = dh;
}
#endif
return (0);
}
#ifdef ISODEVMAP
/*
* Enter a new node into the device hash list
*/
struct iso_dnode *
iso_dmap(dev,ino,create)
dev_t dev;
ino_t ino;
int create;
{
struct iso_dnode *dp;
union iso_dhead *dh;
dh = &iso_dhead[DNOHASH(dev, ino)];
for (dp = dh->dh_chain[0];
dp != (struct iso_dnode *)dh;
dp = dp->d_forw)
if (ino == dp->i_number && dev == dp->i_dev)
return dp;
if (!create)
return (struct iso_dnode *)0;
MALLOC(dp,struct iso_dnode *,sizeof(struct iso_dnode),M_CACHE,M_WAITOK);
dp->i_dev = dev;
dp->i_number = ino;
insque(dp,dh);
return dp;
}
void
iso_dunmap(dev)
dev_t dev;
{
struct iso_dnode *dp, *dq;
union iso_dhead *dh;
for (dh = iso_dhead; dh < iso_dhead + DNOHSZ; dh++) {
for (dp = dh->dh_chain[0];
dp != (struct iso_dnode *)dh;
dp = dq) {
dq = dp->d_forw;
if (dev == dp->i_dev) {
remque(dp);
FREE(dp,M_CACHE);
}
}
}
}
#endif
/*
* Look up a ISOFS dinode number to find its incore vnode.
* If it is not in core, read it in from the specified device.
* If it is in core, wait for the lock bit to clear, then
* return the inode locked. Detection and handling of mount
* points must be done by the calling routine.
*/
int
iso_iget(xp, ino, relocated, ipp, isodir)
struct iso_node *xp;
ino_t ino;
int relocated;
struct iso_node **ipp;
struct iso_directory_record *isodir;
{
dev_t dev = xp->i_dev;
struct mount *mntp = ITOV(xp)->v_mount;
register struct iso_node *ip, *iq;
register struct vnode *vp;
#ifdef ISODEVMAP
register struct iso_dnode *dp;
#endif
struct vnode *nvp;
struct buf *bp = NULL, *bp2 = NULL;
union iso_ihead *ih;
int error, result;
struct iso_mnt *imp;
ih = &iso_ihead[INOHASH(dev, ino)];
loop:
for (ip = ih->ih_chain[0];
ip != (struct iso_node *)ih;
ip = ip->i_forw) {
if (ino != ip->i_number || dev != ip->i_dev)
continue;
if ((ip->i_flag&ILOCKED) != 0) {
ip->i_flag |= IWANT;
(void) tsleep((caddr_t)ip, PINOD, "isoigt", 0);
goto loop;
}
if (vget(ITOV(ip), 1))
goto loop;
*ipp = ip;
return 0;
}
/*
* Allocate a new vnode/iso_node.
*/
if ((error = getnewvnode(VT_ISOFS, mntp, cd9660_vnodeop_p, &nvp))) {
*ipp = 0;
return error;
}
MALLOC(ip, struct iso_node *, sizeof(struct iso_node),
M_ISOFSNODE, M_WAITOK);
bzero((caddr_t)ip, sizeof(struct iso_node));
nvp->v_data = ip;
ip->i_vnode = nvp;
ip->i_flag = 0;
ip->i_devvp = 0;
ip->i_diroff = 0;
ip->i_lockf = 0;
/*
* 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.
*/
ip->i_dev = dev;
ip->i_number = ino;
insque(ip, ih);
ISO_ILOCK(ip);
imp = VFSTOISOFS (mntp);
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 ((error = iso_blkatoff(ip,0,&bp))) {
vrele(ip->i_devvp);
remque(ip);
ip->i_forw = ip;
ip->i_back = ip;
iso_iput(ip);
*ipp = 0;
return error;
}
isodir = (struct iso_directory_record *)bp->b_un.b_addr;
}
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;
vp = ITOV(ip);
/*
* Setup time stamp, attribute
*/
vp->v_type = VNON;
switch (imp->iso_ftype) {
default: /* ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA */
if ((imp->im_flags&ISOFSMNT_EXTATT)
&& isonum_711(isodir->ext_attr_length))
iso_blkatoff(ip,-isonum_711(isodir->ext_attr_length),
&bp2);
cd9660_defattr(isodir,ip,bp2,imp->iso_ftype );
cd9660_deftstamp(isodir,ip,bp2,imp->iso_ftype );
break;
case ISO_FTYPE_RRIP:
result = cd9660_rrip_analyze(isodir,ip,imp);
break;
}
if (bp2)
brelse(bp2);
if (bp)
brelse(bp);
/*
* Initialize the associated vnode
*/
vp->v_type = IFTOVT(ip->inode.iso_mode);
if ( vp->v_type == VFIFO ) {
vp->v_op = cd9660_fifoop_p;
} else if ( vp->v_type == VCHR || vp->v_type == 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, mntp))) {
/*
* Reinitialize aliased inode.
*/
vp = nvp;
iq = VTOI(vp);
iq->i_vnode = vp;
iq->i_flag = 0;
ISO_ILOCK(iq);
iq->i_dev = dev;
iq->i_number = ino;
iq->i_mnt = ip->i_mnt;
bcopy(&ip->iso_extent,&iq->iso_extent,
(char *)(ip + 1) - (char *)&ip->iso_extent);
insque(iq, ih);
/*
* Discard unneeded vnode
* (This introduces the need of INACTIVE modification)
*/
ip->inode.iso_mode = 0;
iso_iput(ip);
ip = iq;
}
}
if (ip->iso_extent == imp->root_extent)
vp->v_flag |= VROOT;
*ipp = ip;
return 0;
}
/*
* Unlock and decrement the reference count of an inode structure.
*/
int
iso_iput(ip)
register struct iso_node *ip;
{
if ((ip->i_flag & ILOCKED) == 0)
panic("iso_iput");
ISO_IUNLOCK(ip);
vrele(ITOV(ip));
return (0);
}
/*
* Last reference to an inode, write the inode out and if necessary,
* truncate and deallocate the file.
*/
int
cd9660_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
register struct iso_node *ip = VTOI(vp);
int error = 0;
if (prtactive && vp->v_usecount != 0)
vprint("cd9660_inactive: pushing active", vp);
ip->i_flag = 0;
/*
* If we are done with the inode, reclaim it
* so that it can be reused immediately.
*/
if (vp->v_usecount == 0 && ip->inode.iso_mode == 0)
vgone(vp);
return error;
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
cd9660_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct iso_node *ip = VTOI(vp);
if (prtactive && vp->v_usecount != 0)
vprint("cd9660_reclaim: pushing active", vp);
/*
* Remove the inode from its hash chain.
*/
remque(ip);
ip->i_forw = ip;
ip->i_back = ip;
/*
* Purge old data structures associated with the inode.
*/
cache_purge(vp);
if (ip->i_devvp) {
vrele(ip->i_devvp);
ip->i_devvp = 0;
}
FREE(vp->v_data, M_ISOFSNODE);
vp->v_data = NULL;
return 0;
}
/*
* Lock an inode. If its already locked, set the WANT bit and sleep.
*/
int
iso_ilock(ip)
register struct iso_node *ip;
{
while (ip->i_flag & ILOCKED) {
ip->i_flag |= IWANT;
if (ip->i_spare0 == curproc->p_pid)
panic("locking against myself");
ip->i_spare1 = curproc->p_pid;
(void) tsleep((caddr_t)ip, PINOD, "isoilk", 0);
}
ip->i_spare1 = 0;
ip->i_spare0 = curproc->p_pid;
ip->i_flag |= ILOCKED;
return (0);
}
/*
* Unlock an inode. If WANT bit is on, wakeup.
*/
int
iso_iunlock(ip)
register struct iso_node *ip;
{
if ((ip->i_flag & ILOCKED) == 0)
vprint("iso_iunlock: unlocked inode", ITOV(ip));
ip->i_spare0 = 0;
ip->i_flag &= ~ILOCKED;
if (ip->i_flag&IWANT) {
ip->i_flag &= ~IWANT;
wakeup((caddr_t)ip);
}
return (0);
}
/*
* File attributes
*/
void
cd9660_defattr(isodir,inop,bp,ftype)
struct iso_directory_record *isodir;
struct iso_node *inop;
struct buf *bp;
enum ISO_FTYPE ftype;
{
struct buf *bp2 = NULL;
struct iso_mnt *imp;
struct iso_extended_attributes *ap = NULL;
int off;
/* high sierra does not have timezone data, flag is one byte ahead */
if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
&isodir->date[6]: isodir->flags)&2) {
inop->inode.iso_mode = S_IFDIR;
/*
* If we return 2, fts() will assume there are no subdirectories
* (just links for the path and .), so instead we return 1.
*/
inop->inode.iso_links = 1;
} else {
inop->inode.iso_mode = S_IFREG;
inop->inode.iso_links = 1;
}
if (!bp
&& ((imp = inop->i_mnt)->im_flags&ISOFSMNT_EXTATT)
&& (off = isonum_711(isodir->ext_attr_length))) {
iso_blkatoff(inop,-off * imp->logical_block_size,&bp2);
bp = bp2;
}
if (bp) {
ap = (struct iso_extended_attributes *)bp->b_un.b_addr;
if (isonum_711(ap->version) == 1) {
if (!(ap->perm[0]&0x40))
inop->inode.iso_mode |= VEXEC >> 6;
if (!(ap->perm[0]&0x10))
inop->inode.iso_mode |= VREAD >> 6;
if (!(ap->perm[0]&4))
inop->inode.iso_mode |= VEXEC >> 3;
if (!(ap->perm[0]&1))
inop->inode.iso_mode |= VREAD >> 3;
if (!(ap->perm[1]&0x40))
inop->inode.iso_mode |= VEXEC;
if (!(ap->perm[1]&0x10))
inop->inode.iso_mode |= VREAD;
inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
} else
ap = NULL;
}
if (!ap) {
inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
inop->inode.iso_uid = (uid_t)0;
inop->inode.iso_gid = (gid_t)0;
}
if (bp2)
brelse(bp2);
}
/*
* Time stamps
*/
void
cd9660_deftstamp(isodir,inop,bp,ftype)
struct iso_directory_record *isodir;
struct iso_node *inop;
struct buf *bp;
enum ISO_FTYPE ftype;
{
struct buf *bp2 = NULL;
struct iso_mnt *imp;
struct iso_extended_attributes *ap = NULL;
int off;
if (!bp
&& ((imp = inop->i_mnt)->im_flags&ISOFSMNT_EXTATT)
&& (off = isonum_711(isodir->ext_attr_length))) {
iso_blkatoff(inop,-off * imp->logical_block_size,&bp2);
bp = bp2;
}
if (bp) {
ap = (struct iso_extended_attributes *)bp->b_un.b_addr;
if (ftype != ISO_FTYPE_HIGH_SIERRA
&& isonum_711(ap->version) == 1) {
if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
inop->inode.iso_ctime = inop->inode.iso_atime;
if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
inop->inode.iso_mtime = inop->inode.iso_ctime;
} else
ap = NULL;
}
if (!ap) {
cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
inop->inode.iso_atime = inop->inode.iso_ctime;
inop->inode.iso_mtime = inop->inode.iso_ctime;
}
if (bp2)
brelse(bp2);
}
int
cd9660_tstamp_conv7(pi,pu,ftype)
char *pi;
struct timespec *pu;
enum ISO_FTYPE ftype;
{
int crtime, days;
int y, m, d, hour, minute, second, tz;
y = pi[0] + 1900;
m = pi[1];
d = pi[2];
hour = pi[3];
minute = pi[4];
second = pi[5];
if(ftype != ISO_FTYPE_HIGH_SIERRA)
tz = pi[6];
else
/* original high sierra misses timezone data */
tz = 0;
if (y < 1970) {
pu->ts_sec = 0;
pu->ts_nsec = 0;
return 0;
} else {
#ifdef ORIGINAL
/* computes day number relative to Sept. 19th,1989 */
/* don't even *THINK* about changing formula. It works! */
days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
#else
/*
* Changed :-) to make it relative to Jan. 1st, 1970
* and to disambiguate negative division
*/
days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
#endif
crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
/* timezone offset is unreliable on some disks */
if (-48 <= tz && tz <= 52)
crtime -= tz * 15 * 60;
}
pu->ts_sec = crtime;
pu->ts_nsec = 0;
return 1;
}
static unsigned
cd9660_chars2ui(begin,len)
unsigned char *begin;
int len;
{
unsigned rc;
for (rc = 0; --len >= 0;) {
rc *= 10;
rc += *begin++ - '0';
}
return rc;
}
int
cd9660_tstamp_conv17(pi,pu)
unsigned char *pi;
struct timespec *pu;
{
unsigned char buf[7];
/* year:"0001"-"9999" -> -1900 */
buf[0] = cd9660_chars2ui(pi,4) - 1900;
/* month: " 1"-"12" -> 1 - 12 */
buf[1] = cd9660_chars2ui(pi + 4,2);
/* day: " 1"-"31" -> 1 - 31 */
buf[2] = cd9660_chars2ui(pi + 6,2);
/* hour: " 0"-"23" -> 0 - 23 */
buf[3] = cd9660_chars2ui(pi + 8,2);
/* minute:" 0"-"59" -> 0 - 59 */
buf[4] = cd9660_chars2ui(pi + 10,2);
/* second:" 0"-"59" -> 0 - 59 */
buf[5] = cd9660_chars2ui(pi + 12,2);
/* difference of GMT */
buf[6] = pi[16];
return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
}
void
isodirino(inump,isodir,imp)
ino_t *inump;
struct iso_directory_record *isodir;
struct iso_mnt *imp;
{
*inump = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
* imp->logical_block_size;
}
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