- Fix for possible unset uid/gid in toproto - Fix for default mtree style - Update libelf - Importing libexecinfo - Resynchronize GCC, mpc, gmp, mpfr - build.sh: Replace params with show-params. This has been done as the make target has been renamed in the same way, while a new target named params has been added. This new target generates a file containing all the parameters, instead of printing it on the console. - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org) get getservbyport() out of the inner loop Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
192 lines
5 KiB
C
192 lines
5 KiB
C
/* $NetBSD: ulfs_ihash.c,v 1.3 2013/06/06 00:48:04 dholland Exp $ */
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/* from NetBSD: ufs_ihash.c,v 1.31 2011/06/12 03:36:02 rmind Exp */
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/*
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* Copyright (c) 1982, 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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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* @(#)ufs_ihash.c 8.7 (Berkeley) 5/17/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ulfs_ihash.c,v 1.3 2013/06/06 00:48:04 dholland Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/proc.h>
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#include <sys/mutex.h>
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#include <ufs/lfs/ulfs_inode.h>
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#include <ufs/lfs/ulfs_extern.h>
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/*
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* Structures associated with inode cacheing.
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*/
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static LIST_HEAD(ihashhead, inode) *ihashtbl;
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static u_long ihash; /* size of hash table - 1 */
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#define INOHASH(device, inum) (((device) + (inum)) & ihash)
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kmutex_t ulfs_ihash_lock;
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kmutex_t ulfs_hashlock;
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/*
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* Initialize inode hash table.
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*/
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void
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ulfs_ihashinit(void)
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{
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mutex_init(&ulfs_hashlock, MUTEX_DEFAULT, IPL_NONE);
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mutex_init(&ulfs_ihash_lock, MUTEX_DEFAULT, IPL_NONE);
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ihashtbl = hashinit(desiredvnodes, HASH_LIST, true, &ihash);
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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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ulfs_ihashreinit(void)
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{
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struct inode *ip;
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struct ihashhead *oldhash, *hash;
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u_long oldmask, mask, val;
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int i;
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hash = hashinit(desiredvnodes, HASH_LIST, true, &mask);
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mutex_enter(&ulfs_ihash_lock);
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oldhash = ihashtbl;
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oldmask = ihash;
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ihashtbl = hash;
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ihash = mask;
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for (i = 0; i <= oldmask; i++) {
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while ((ip = LIST_FIRST(&oldhash[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(&hash[val], ip, i_hash);
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}
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}
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mutex_exit(&ulfs_ihash_lock);
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hashdone(oldhash, HASH_LIST, oldmask);
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}
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/*
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* Free inode hash table.
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*/
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void
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ulfs_ihashdone(void)
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{
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hashdone(ihashtbl, HASH_LIST, ihash);
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mutex_destroy(&ulfs_hashlock);
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mutex_destroy(&ulfs_ihash_lock);
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}
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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, return it, even if it is locked.
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*/
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struct vnode *
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ulfs_ihashlookup(dev_t dev, ino_t inum)
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{
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struct inode *ip;
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struct ihashhead *ipp;
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KASSERT(mutex_owned(&ulfs_ihash_lock));
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ipp = &ihashtbl[INOHASH(dev, inum)];
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LIST_FOREACH(ip, ipp, i_hash) {
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if (inum == ip->i_number && dev == ip->i_dev)
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break;
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}
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if (ip)
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return (ITOV(ip));
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return (NULLVP);
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}
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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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ulfs_ihashget(dev_t dev, ino_t inum, int flags)
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{
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struct ihashhead *ipp;
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struct inode *ip;
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struct vnode *vp;
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loop:
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mutex_enter(&ulfs_ihash_lock);
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ipp = &ihashtbl[INOHASH(dev, inum)];
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LIST_FOREACH(ip, ipp, 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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if (flags == 0) {
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mutex_exit(&ulfs_ihash_lock);
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} else {
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mutex_enter(vp->v_interlock);
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mutex_exit(&ulfs_ihash_lock);
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if (vget(vp, flags))
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goto loop;
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}
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return (vp);
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}
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}
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mutex_exit(&ulfs_ihash_lock);
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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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void
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ulfs_ihashins(struct inode *ip)
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{
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struct ihashhead *ipp;
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KASSERT(mutex_owned(&ulfs_hashlock));
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/* lock the inode, then put it on the appropriate hash list */
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VOP_LOCK(ITOV(ip), LK_EXCLUSIVE);
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mutex_enter(&ulfs_ihash_lock);
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ipp = &ihashtbl[INOHASH(ip->i_dev, ip->i_number)];
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LIST_INSERT_HEAD(ipp, ip, i_hash);
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mutex_exit(&ulfs_ihash_lock);
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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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ulfs_ihashrem(struct inode *ip)
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{
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mutex_enter(&ulfs_ihash_lock);
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LIST_REMOVE(ip, i_hash);
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mutex_exit(&ulfs_ihash_lock);
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}
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