1d3a6a329e
an _LKM. This adds pools to the list of things that lkms must do manually because they're set up with link sets. Not that there's anything wrong with link sets, but that we need to try harder to remember that lkms are second class citizens. Of a sort.
551 lines
13 KiB
C
551 lines
13 KiB
C
/* $NetBSD: cd9660_node.c,v 1.8 2004/05/20 05:39:34 atatat Exp $ */
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/*-
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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. 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 8.8 (Berkeley) 5/22/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cd9660_node.c,v 1.8 2004/05/20 05:39:34 atatat Exp $");
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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/namei.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/pool.h>
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#include <sys/stat.h>
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#include <fs/cd9660/iso.h>
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#include <fs/cd9660/cd9660_extern.h>
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#include <fs/cd9660/cd9660_node.h>
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#include <fs/cd9660/cd9660_mount.h>
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#include <fs/cd9660/iso_rrip.h>
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/*
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* Structures associated with iso_node caching.
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*/
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LIST_HEAD(ihashhead, iso_node) *isohashtbl;
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u_long isohash;
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#define INOHASH(device, inum) (((device) + ((inum)>>12)) & isohash)
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struct simplelock cd9660_ihash_slock;
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#ifdef ISODEVMAP
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LIST_HEAD(idvhashhead, iso_dnode) *idvhashtbl;
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u_long idvhash;
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#define DNOHASH(device, inum) (((device) + ((inum)>>12)) & idvhash)
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#endif
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extern int prtactive; /* 1 => print out reclaim of active vnodes */
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POOL_INIT(cd9660_node_pool, sizeof(struct iso_node), 0, 0, 0, "cd9660nopl",
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&pool_allocator_nointr);
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static u_int cd9660_chars2ui __P((u_char *, int));
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/*
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* Initialize hash links for inodes and dnodes.
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*/
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void
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cd9660_init()
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{
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#ifdef _LKM
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malloc_type_attach(M_ISOFSMNT);
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pool_init(&cd9660_node_pool, sizeof(struct iso_node), 0, 0, 0,
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"cd9660nopl", &pool_allocator_nointr);
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#endif
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isohashtbl = hashinit(desiredvnodes, HASH_LIST, M_ISOFSMNT, M_WAITOK,
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&isohash);
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simple_lock_init(&cd9660_ihash_slock);
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#ifdef ISODEVMAP
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idvhashtbl = hashinit(desiredvnodes / 8, HASH_LIST, M_ISOFSMNT,
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M_WAITOK, &idvhash);
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#endif
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}
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/*
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* Reinitialize inode hash table.
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*/
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void
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cd9660_reinit()
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{
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struct iso_node *ip;
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struct ihashhead *oldhash1, *hash1;
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u_long oldmask1, mask1, val;
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#ifdef ISODEVMAP
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struct iso_dnode *dp;
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struct idvhashhead *oldhash2, *hash2;
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u_long oldmask2, mask2;
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#endif
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u_int i;
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hash1 = hashinit(desiredvnodes, HASH_LIST, M_ISOFSMNT, M_WAITOK,
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&mask1);
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#ifdef ISODEVMAP
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hash2 = hashinit(desiredvnodes / 8, HASH_LIST, M_ISOFSMNT, M_WAITOK,
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&mask2);
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#endif
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simple_lock(&cd9660_ihash_slock);
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oldhash1 = isohashtbl;
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oldmask1 = isohash;
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isohashtbl = hash1;
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isohash = mask1;
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#ifdef ISODEVMAP
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oldhash2 = idvhashtbl;
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oldmask2 = idvhash;
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idvhashtbl = hash2;
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idvhash = mask2;
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for (i = 0; i <= oldmask2; i++) {
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while ((dp = LIST_FIRST(&oldhash2[i])) != NULL) {
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LIST_REMOVE(dp, d_hash);
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val = DNOHASH(dp->i_dev, dp->i_number);
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LIST_INSERT_HEAD(&hash2[val], dp, d_hash);
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}
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}
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#endif
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for (i = 0; i <= oldmask1; i++) {
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while ((ip = LIST_FIRST(&oldhash1[i])) != NULL) {
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LIST_REMOVE(ip, i_hash);
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val = INOHASH(ip->i_dev, ip->i_number);
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LIST_INSERT_HEAD(&hash1[val], ip, i_hash);
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}
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}
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simple_unlock(&cd9660_ihash_slock);
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hashdone(oldhash1, M_ISOFSMNT);
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#ifdef ISODEVMAP
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hashdone(oldhash2, M_ISOFSMNT);
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#endif
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}
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/*
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* Destroy node pool and hash table.
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*/
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void
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cd9660_done()
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{
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hashdone(isohashtbl, M_ISOFSMNT);
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#ifdef ISODEVMAP
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hashdone(idvhashtbl, M_ISOFSMNT);
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#endif
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#ifdef _LKM
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pool_destroy(&cd9660_node_pool);
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malloc_type_detach(M_ISOFSMNT);
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#endif
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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(device, inum, create)
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dev_t device;
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ino_t inum;
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int create;
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{
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struct iso_dnode *dp;
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struct idvhashhead *hp;
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hp = &idvhashtbl[DNOHASH(device, inum)];
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LIST_FOREACH(dp, hp, d_hash) {
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if (inum == dp->i_number && device == dp->i_dev)
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return (dp);
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}
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if (!create)
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return (NULL);
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MALLOC(dp, struct iso_dnode *, sizeof(struct iso_dnode), M_CACHE,
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M_WAITOK);
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dp->i_dev = device;
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dp->i_number = inum;
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LIST_INSERT_HEAD(hp, dp, d_hash);
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return (dp);
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}
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void
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iso_dunmap(device)
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dev_t device;
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{
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struct idvhashhead *dpp;
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struct iso_dnode *dp, *dq;
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for (dpp = idvhashtbl; dpp <= idvhashtbl + idvhash; dpp++) {
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for (dp = LIST_FIRST(dpp); dp != NULL; dp = dq) {
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dq = LIST_NEXT(dp, d_hash);
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if (device == dp->i_dev) {
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LIST_REMOVE(dp, d_hash);
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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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* Use the device/inum pair to find the incore inode, and return a pointer
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* to it. If it is in core, but locked, wait for it.
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*/
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struct vnode *
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cd9660_ihashget(dev, inum)
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dev_t dev;
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ino_t inum;
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{
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struct iso_node *ip;
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struct vnode *vp;
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loop:
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simple_lock(&cd9660_ihash_slock);
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LIST_FOREACH(ip, &isohashtbl[INOHASH(dev, inum)], i_hash) {
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if (inum == ip->i_number && dev == ip->i_dev) {
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vp = ITOV(ip);
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simple_lock(&vp->v_interlock);
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simple_unlock(&cd9660_ihash_slock);
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if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK))
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goto loop;
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return (vp);
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}
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}
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simple_unlock(&cd9660_ihash_slock);
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return (NULL);
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}
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/*
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* Insert the inode into the hash table, and return it locked.
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*
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* ip->i_vnode must be initialized first.
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*/
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void
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cd9660_ihashins(ip)
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struct iso_node *ip;
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{
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struct ihashhead *ipp;
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simple_lock(&cd9660_ihash_slock);
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ipp = &isohashtbl[INOHASH(ip->i_dev, ip->i_number)];
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LIST_INSERT_HEAD(ipp, ip, i_hash);
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simple_unlock(&cd9660_ihash_slock);
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lockmgr(&ip->i_vnode->v_lock, LK_EXCLUSIVE, &ip->i_vnode->v_interlock);
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}
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/*
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* Remove the inode from the hash table.
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*/
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void
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cd9660_ihashrem(ip)
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struct iso_node *ip;
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{
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simple_lock(&cd9660_ihash_slock);
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LIST_REMOVE(ip, i_hash);
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simple_unlock(&cd9660_ihash_slock);
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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(v)
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void *v;
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{
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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struct proc *a_p;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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struct proc *p = ap->a_p;
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struct iso_node *ip = VTOI(vp);
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int 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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VOP_UNLOCK(vp, 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 (ip->inode.iso_mode == 0)
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vrecycle(vp, (struct simplelock *)0, p);
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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(v)
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void *v;
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{
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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struct proc *a_p;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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struct iso_node *ip = VTOI(vp);
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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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cd9660_ihashrem(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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pool_put(&cd9660_node_pool, vp->v_data);
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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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* 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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VOP_BLKATOFF(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
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&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_data;
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if (isonum_711(ap->version) == 1) {
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if (!(ap->perm[1]&0x10))
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inop->inode.iso_mode |= S_IRUSR;
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if (!(ap->perm[1]&0x40))
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inop->inode.iso_mode |= S_IXUSR;
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if (!(ap->perm[0]&0x01))
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inop->inode.iso_mode |= S_IRGRP;
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if (!(ap->perm[0]&0x04))
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inop->inode.iso_mode |= S_IXGRP;
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if (!(ap->perm[0]&0x10))
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inop->inode.iso_mode |= S_IROTH;
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if (!(ap->perm[0]&0x40))
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inop->inode.iso_mode |= S_IXOTH;
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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? */
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} else
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ap = NULL;
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}
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if (!ap) {
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inop->inode.iso_mode |=
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S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
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inop->inode.iso_uid = (uid_t)0;
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inop->inode.iso_gid = (gid_t)0;
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}
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if (bp2)
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brelse(bp2);
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}
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/*
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* Time stamps
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*/
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void
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cd9660_deftstamp(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 (!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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VOP_BLKATOFF(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
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&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_data;
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if (isonum_711(ap->version) == 1) {
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if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
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cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
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if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
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inop->inode.iso_ctime = inop->inode.iso_atime;
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if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
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inop->inode.iso_mtime = inop->inode.iso_ctime;
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} else
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ap = NULL;
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}
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if (!ap) {
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cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime);
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inop->inode.iso_atime = inop->inode.iso_ctime;
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inop->inode.iso_mtime = inop->inode.iso_ctime;
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}
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if (bp2)
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brelse(bp2);
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}
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int
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cd9660_tstamp_conv7(pi,pu)
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u_char *pi;
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struct timespec *pu;
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{
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int crtime, days;
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int y, m, d, hour, minute, second, tz;
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y = pi[0] + 1900;
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m = pi[1];
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d = pi[2];
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hour = pi[3];
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minute = pi[4];
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second = pi[5];
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tz = pi[6];
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if (y < 1970) {
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pu->tv_sec = 0;
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pu->tv_nsec = 0;
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return 0;
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} else {
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#ifdef ORIGINAL
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/* computes day number relative to Sept. 19th,1989 */
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/* don't even *THINK* about changing formula. It works! */
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days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
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#else
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/*
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* Changed :-) to make it relative to Jan. 1st, 1970
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* and to disambiguate negative division
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*/
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days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
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#endif
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crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
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/* timezone offset is unreliable on some disks */
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if (-48 <= tz && tz <= 52)
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|
crtime -= tz * 15 * 60;
|
|
}
|
|
pu->tv_sec = crtime;
|
|
pu->tv_nsec = 0;
|
|
return 1;
|
|
}
|
|
|
|
static u_int
|
|
cd9660_chars2ui(begin,len)
|
|
u_char *begin;
|
|
int len;
|
|
{
|
|
u_int rc;
|
|
|
|
for (rc = 0; --len >= 0;) {
|
|
rc *= 10;
|
|
rc += *begin++ - '0';
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
cd9660_tstamp_conv17(pi,pu)
|
|
u_char *pi;
|
|
struct timespec *pu;
|
|
{
|
|
u_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);
|
|
}
|
|
|
|
ino_t
|
|
isodirino(isodir, imp)
|
|
struct iso_directory_record *isodir;
|
|
struct iso_mnt *imp;
|
|
{
|
|
ino_t ino;
|
|
|
|
ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
|
|
<< imp->im_bshift;
|
|
return (ino);
|
|
}
|