835b0326c5
an init method. So get rid of it and #ifdef _LKM and just always init in the init method. Give malloc types the same treatment. Makes file systems nicer to work with in linksetless environments and fixes a few LKM discrepancies.
548 lines
13 KiB
C
548 lines
13 KiB
C
/* $NetBSD: cd9660_node.c,v 1.16 2007/06/30 09:37:55 pooka 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 1.16 2007/06/30 09:37:55 pooka 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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struct pool cd9660_node_pool;
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static u_int cd9660_chars2ui(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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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, IPL_NONE);
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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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pool_destroy(&cd9660_node_pool);
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malloc_type_detach(M_ISOFSMNT);
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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 lwp *a_l;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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struct lwp *l = ap->a_l;
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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, l);
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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 lwp *a_l;
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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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genfs_node_destroy(vp);
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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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cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift),
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NULL, &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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cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift),
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NULL, &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;
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}
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pu->tv_sec = crtime;
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pu->tv_nsec = 0;
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return 1;
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}
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|
|
|
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 tbuf[7];
|
|
|
|
/* year:"0001"-"9999" -> -1900 */
|
|
tbuf[0] = cd9660_chars2ui(pi,4) - 1900;
|
|
|
|
/* month: " 1"-"12" -> 1 - 12 */
|
|
tbuf[1] = cd9660_chars2ui(pi + 4,2);
|
|
|
|
/* day: " 1"-"31" -> 1 - 31 */
|
|
tbuf[2] = cd9660_chars2ui(pi + 6,2);
|
|
|
|
/* hour: " 0"-"23" -> 0 - 23 */
|
|
tbuf[3] = cd9660_chars2ui(pi + 8,2);
|
|
|
|
/* minute:" 0"-"59" -> 0 - 59 */
|
|
tbuf[4] = cd9660_chars2ui(pi + 10,2);
|
|
|
|
/* second:" 0"-"59" -> 0 - 59 */
|
|
tbuf[5] = cd9660_chars2ui(pi + 12,2);
|
|
|
|
/* difference of GMT */
|
|
tbuf[6] = pi[16];
|
|
|
|
return cd9660_tstamp_conv7(tbuf,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);
|
|
}
|