1dbaf90cdb
Remove the unnecessary inclusion of disklabel.h in cd9660_vfsops.c so that I don't have to worry about the latter when changing disklabel.h. Supply prototypes for some functions that were implicitly declared and fix the resulting warnings and errors (timevals were punned to timespecs).
660 lines
15 KiB
C
660 lines
15 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
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* $Id: cd9660_node.c,v 1.3 1994/08/02 07:41:19 davidg Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/buf.h>
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#include <sys/vnode.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <isofs/cd9660/iso.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/iso_rrip.h>
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#define INOHSZ 512
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#if ((INOHSZ&(INOHSZ-1)) == 0)
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#define INOHASH(dev,ino) (((dev)+((ino)>>12))&(INOHSZ-1))
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#else
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#define INOHASH(dev,ino) (((unsigned)((dev)+((ino)>>12)))%INOHSZ)
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#endif
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union iso_ihead {
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union iso_ihead *ih_head[2];
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struct iso_node *ih_chain[2];
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} iso_ihead[INOHSZ];
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#ifdef ISODEVMAP
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#define DNOHSZ 64
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#if ((DNOHSZ&(DNOHSZ-1)) == 0)
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#define DNOHASH(dev,ino) (((dev)+((ino)>>12))&(DNOHSZ-1))
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#else
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#define DNOHASH(dev,ino) (((unsigned)((dev)+((ino)>>12)))%DNOHSZ)
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#endif
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union iso_dhead {
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union iso_dhead *dh_head[2];
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struct iso_dnode *dh_chain[2];
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} iso_dhead[DNOHSZ];
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#endif
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int prtactive; /* 1 => print out reclaim of active vnodes */
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/*
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* Initialize hash links for inodes and dnodes.
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*/
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int
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cd9660_init()
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{
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register int i;
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register union iso_ihead *ih = iso_ihead;
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#ifdef ISODEVMAP
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register union iso_dhead *dh = iso_dhead;
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#endif
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for (i = INOHSZ; --i >= 0; ih++) {
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ih->ih_head[0] = ih;
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ih->ih_head[1] = ih;
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}
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#ifdef ISODEVMAP
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for (i = DNOHSZ; --i >= 0; dh++) {
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dh->dh_head[0] = dh;
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dh->dh_head[1] = dh;
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}
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#endif
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return (0);
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}
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#ifdef ISODEVMAP
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/*
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* Enter a new node into the device hash list
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*/
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struct iso_dnode *
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iso_dmap(dev,ino,create)
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dev_t dev;
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ino_t ino;
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int create;
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{
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struct iso_dnode *dp;
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union iso_dhead *dh;
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dh = &iso_dhead[DNOHASH(dev, ino)];
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for (dp = dh->dh_chain[0];
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dp != (struct iso_dnode *)dh;
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dp = dp->d_forw)
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if (ino == dp->i_number && dev == dp->i_dev)
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return dp;
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if (!create)
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return (struct iso_dnode *)0;
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MALLOC(dp,struct iso_dnode *,sizeof(struct iso_dnode),M_CACHE,M_WAITOK);
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dp->i_dev = dev;
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dp->i_number = ino;
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insque(dp,dh);
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return dp;
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}
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void
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iso_dunmap(dev)
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dev_t dev;
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{
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struct iso_dnode *dp, *dq;
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union iso_dhead *dh;
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for (dh = iso_dhead; dh < iso_dhead + DNOHSZ; dh++) {
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for (dp = dh->dh_chain[0];
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dp != (struct iso_dnode *)dh;
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dp = dq) {
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dq = dp->d_forw;
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if (dev == dp->i_dev) {
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remque(dp);
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FREE(dp,M_CACHE);
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}
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}
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}
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}
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#endif
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/*
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* Look up a ISOFS dinode number to find its incore vnode.
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* If it is not in core, read it in from the specified device.
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* If it is in core, wait for the lock bit to clear, then
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* return the inode locked. Detection and handling of mount
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* points must be done by the calling routine.
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*/
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int
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iso_iget(xp, ino, relocated, ipp, isodir)
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struct iso_node *xp;
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ino_t ino;
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int relocated;
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struct iso_node **ipp;
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struct iso_directory_record *isodir;
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{
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dev_t dev = xp->i_dev;
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struct mount *mntp = ITOV(xp)->v_mount;
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register struct iso_node *ip, *iq;
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register struct vnode *vp;
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register struct iso_dnode *dp;
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struct vnode *nvp;
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struct buf *bp = NULL, *bp2 = NULL;
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union iso_ihead *ih;
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union iso_dhead *dh;
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int i, error, result;
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struct iso_mnt *imp;
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ino_t defino;
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ih = &iso_ihead[INOHASH(dev, ino)];
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loop:
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for (ip = ih->ih_chain[0];
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ip != (struct iso_node *)ih;
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ip = ip->i_forw) {
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if (ino != ip->i_number || dev != ip->i_dev)
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continue;
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if ((ip->i_flag&ILOCKED) != 0) {
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ip->i_flag |= IWANT;
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sleep((caddr_t)ip, PINOD);
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goto loop;
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}
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if (vget(ITOV(ip), 1))
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goto loop;
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*ipp = ip;
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return 0;
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}
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/*
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* Allocate a new vnode/iso_node.
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*/
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if (error = getnewvnode(VT_ISOFS, mntp, cd9660_vnodeop_p, &nvp)) {
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*ipp = 0;
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return error;
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}
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MALLOC(ip, struct iso_node *, sizeof(struct iso_node),
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M_ISOFSNODE, M_WAITOK);
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bzero((caddr_t)ip, sizeof(struct iso_node));
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nvp->v_data = ip;
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ip->i_vnode = nvp;
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ip->i_flag = 0;
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ip->i_devvp = 0;
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ip->i_diroff = 0;
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ip->i_lockf = 0;
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/*
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* Put it onto its hash chain and lock it so that other requests for
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* this inode will block if they arrive while we are sleeping waiting
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* for old data structures to be purged or for the contents of the
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* disk portion of this inode to be read.
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*/
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ip->i_dev = dev;
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ip->i_number = ino;
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insque(ip, ih);
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ISO_ILOCK(ip);
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imp = VFSTOISOFS (mntp);
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ip->i_mnt = imp;
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ip->i_devvp = imp->im_devvp;
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VREF(ip->i_devvp);
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if (relocated) {
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/*
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* On relocated directories we must
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* read the `.' entry out of a dir.
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*/
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ip->iso_start = ino >> imp->im_bshift;
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if (error = iso_blkatoff(ip,0,&bp)) {
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vrele(ip->i_devvp);
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remque(ip);
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ip->i_forw = ip;
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ip->i_back = ip;
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iso_iput(ip);
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*ipp = 0;
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return error;
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}
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isodir = (struct iso_directory_record *)bp->b_un.b_addr;
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}
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ip->iso_extent = isonum_733(isodir->extent);
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ip->i_size = isonum_733(isodir->size);
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ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
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vp = ITOV(ip);
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/*
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* Setup time stamp, attribute
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*/
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vp->v_type = VNON;
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switch (imp->iso_ftype) {
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default: /* ISO_FTYPE_9660 */
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if ((imp->im_flags&ISOFSMNT_EXTATT)
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&& isonum_711(isodir->ext_attr_length))
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iso_blkatoff(ip,-isonum_711(isodir->ext_attr_length),
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&bp2);
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cd9660_defattr(isodir,ip,bp2 );
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cd9660_deftstamp(isodir,ip,bp2 );
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break;
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case ISO_FTYPE_RRIP:
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result = cd9660_rrip_analyze(isodir,ip,imp);
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break;
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}
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if (bp2)
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brelse(bp2);
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if (bp)
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brelse(bp);
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/*
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* Initialize the associated vnode
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*/
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vp->v_type = IFTOVT(ip->inode.iso_mode);
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if ( vp->v_type == VFIFO ) {
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#ifdef FIFO
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extern int (**cd9660_fifoop_p)();
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vp->v_op = cd9660_fifoop_p;
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#else
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iso_iput(ip);
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*ipp = 0;
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return EOPNOTSUPP;
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#endif /* FIFO */
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} else if ( vp->v_type == VCHR || vp->v_type == VBLK ) {
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extern int (**cd9660_specop_p)();
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/*
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* if device, look at device number table for translation
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*/
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#ifdef ISODEVMAP
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if (dp = iso_dmap(dev,ino,0))
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ip->inode.iso_rdev = dp->d_dev;
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#endif
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vp->v_op = cd9660_specop_p;
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if (nvp = checkalias(vp, ip->inode.iso_rdev, mntp)) {
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/*
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* Reinitialize aliased inode.
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*/
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vp = nvp;
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iq = VTOI(vp);
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iq->i_vnode = vp;
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iq->i_flag = 0;
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ISO_ILOCK(iq);
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iq->i_dev = dev;
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iq->i_number = ino;
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iq->i_mnt = ip->i_mnt;
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bcopy(&ip->iso_extent,&iq->iso_extent,
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(char *)(ip + 1) - (char *)&ip->iso_extent);
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insque(iq, ih);
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/*
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* Discard unneeded vnode
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* (This introduces the need of INACTIVE modification)
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*/
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ip->inode.iso_mode = 0;
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iso_iput(ip);
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ip = iq;
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}
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}
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if (ip->iso_extent == imp->root_extent)
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vp->v_flag |= VROOT;
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*ipp = ip;
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return 0;
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}
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/*
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* Unlock and decrement the reference count of an inode structure.
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*/
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int
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iso_iput(ip)
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register struct iso_node *ip;
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{
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if ((ip->i_flag & ILOCKED) == 0)
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panic("iso_iput");
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ISO_IUNLOCK(ip);
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vrele(ITOV(ip));
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return (0);
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}
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/*
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* Last reference to an inode, write the inode out and if necessary,
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* truncate and deallocate the file.
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*/
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int
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cd9660_inactive(ap)
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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register struct iso_node *ip = VTOI(vp);
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int mode, error = 0;
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if (prtactive && vp->v_usecount != 0)
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vprint("cd9660_inactive: pushing active", vp);
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ip->i_flag = 0;
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/*
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* If we are done with the inode, reclaim it
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* so that it can be reused immediately.
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*/
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if (vp->v_usecount == 0 && ip->inode.iso_mode == 0)
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vgone(vp);
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return error;
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}
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/*
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* Reclaim an inode so that it can be used for other purposes.
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*/
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int
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cd9660_reclaim(ap)
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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} */ *ap;
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{
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register struct vnode *vp = ap->a_vp;
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register struct iso_node *ip = VTOI(vp);
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int i;
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if (prtactive && vp->v_usecount != 0)
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vprint("cd9660_reclaim: pushing active", vp);
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/*
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* Remove the inode from its hash chain.
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*/
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remque(ip);
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ip->i_forw = ip;
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ip->i_back = ip;
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/*
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* Purge old data structures associated with the inode.
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*/
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cache_purge(vp);
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if (ip->i_devvp) {
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vrele(ip->i_devvp);
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ip->i_devvp = 0;
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}
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FREE(vp->v_data, M_ISOFSNODE);
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vp->v_data = NULL;
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return 0;
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}
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/*
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* Lock an inode. If its already locked, set the WANT bit and sleep.
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*/
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int
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iso_ilock(ip)
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register struct iso_node *ip;
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{
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while (ip->i_flag & ILOCKED) {
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ip->i_flag |= IWANT;
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if (ip->i_spare0 == curproc->p_pid)
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panic("locking against myself");
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ip->i_spare1 = curproc->p_pid;
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(void) sleep((caddr_t)ip, PINOD);
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}
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ip->i_spare1 = 0;
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ip->i_spare0 = curproc->p_pid;
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ip->i_flag |= ILOCKED;
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return (0);
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}
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/*
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* Unlock an inode. If WANT bit is on, wakeup.
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*/
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int
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iso_iunlock(ip)
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register struct iso_node *ip;
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{
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if ((ip->i_flag & ILOCKED) == 0)
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vprint("iso_iunlock: unlocked inode", ITOV(ip));
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ip->i_spare0 = 0;
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ip->i_flag &= ~ILOCKED;
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if (ip->i_flag&IWANT) {
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ip->i_flag &= ~IWANT;
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wakeup((caddr_t)ip);
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}
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return (0);
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}
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/*
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* File attributes
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*/
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void
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cd9660_defattr(isodir,inop,bp)
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struct iso_directory_record *isodir;
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struct iso_node *inop;
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struct buf *bp;
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{
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struct buf *bp2 = NULL;
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struct iso_mnt *imp;
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struct iso_extended_attributes *ap = NULL;
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int off;
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if (isonum_711(isodir->flags)&2) {
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inop->inode.iso_mode = S_IFDIR;
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/*
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* If we return 2, fts() will assume there are no subdirectories
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* (just links for the path and .), so instead we return 1.
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*/
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inop->inode.iso_links = 1;
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} else {
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inop->inode.iso_mode = S_IFREG;
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inop->inode.iso_links = 1;
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}
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if (!bp
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&& ((imp = inop->i_mnt)->im_flags&ISOFSMNT_EXTATT)
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&& (off = isonum_711(isodir->ext_attr_length))) {
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iso_blkatoff(inop,-off * imp->logical_block_size,&bp2);
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bp = bp2;
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}
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if (bp) {
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ap = (struct iso_extended_attributes *)bp->b_un.b_addr;
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if (isonum_711(ap->version) == 1) {
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if (!(ap->perm[0]&0x40))
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inop->inode.iso_mode |= VEXEC >> 6;
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if (!(ap->perm[0]&0x10))
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inop->inode.iso_mode |= VREAD >> 6;
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if (!(ap->perm[0]&4))
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inop->inode.iso_mode |= VEXEC >> 3;
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if (!(ap->perm[0]&1))
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inop->inode.iso_mode |= VREAD >> 3;
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if (!(ap->perm[1]&0x40))
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inop->inode.iso_mode |= VEXEC;
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if (!(ap->perm[1]&0x10))
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inop->inode.iso_mode |= VREAD;
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inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
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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)
|
|
struct iso_directory_record *isodir;
|
|
struct iso_node *inop;
|
|
struct buf *bp;
|
|
{
|
|
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 (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);
|
|
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)
|
|
char *pi;
|
|
struct timespec *pu;
|
|
{
|
|
int i;
|
|
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];
|
|
tz = pi[6];
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|