84d9c625bf
- 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
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/* $NetBSD: chfs_vnode_cache.c,v 1.3 2012/10/19 12:44:39 ttoth Exp $ */
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/*-
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* Copyright (c) 2010 Department of Software Engineering,
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* University of Szeged, Hungary
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* Copyright (C) 2010 Tamas Toth <ttoth@inf.u-szeged.hu>
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* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by the Department of Software Engineering, University of Szeged, Hungary
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include "chfs.h"
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#include <sys/pool.h>
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/* vnode cache is a hashtable for vnodes */
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/* chfs_vnocache_hash_init - initializing the hashtable */
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struct chfs_vnode_cache **
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chfs_vnocache_hash_init(void)
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{
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return kmem_zalloc(VNODECACHE_SIZE *
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sizeof(struct chfs_vnode_cache *), KM_SLEEP);
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}
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/*
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* chfs_vnode_cache_get - get a vnode_cache from the hashtable
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* Returns the vnode_cache.
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*/
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struct chfs_vnode_cache *
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chfs_vnode_cache_get(struct chfs_mount *chmp, ino_t vno)
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{
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struct chfs_vnode_cache* ret;
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KASSERT(mutex_owned(&chmp->chm_lock_vnocache));
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ret = chmp->chm_vnocache_hash[vno % VNODECACHE_SIZE];
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if (ret == NULL) {
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return NULL;
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}
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while (ret && ret->vno < vno) {
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ret = ret->next;
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}
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if (ret && ret->vno != vno) {
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ret = NULL;
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}
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return ret;
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}
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/* chfs_vnode_cache_add - add a vnode_cache to the hashtable */
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void
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chfs_vnode_cache_add(struct chfs_mount *chmp,
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struct chfs_vnode_cache* new)
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{
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struct chfs_vnode_cache** prev;
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KASSERT(mutex_owned(&chmp->chm_lock_vnocache));
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if (!new->vno) {
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new->vno = ++chmp->chm_max_vno;
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}
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prev = &chmp->chm_vnocache_hash[new->vno % VNODECACHE_SIZE];
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while ((*prev) && (*prev)->vno < new->vno) {
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prev = &((*prev)->next);
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}
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new->next = *prev;
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*prev = new;
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}
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/* chfs_vnode_cache_remove - removes a vnode_cache from the hashtable */
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void
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chfs_vnode_cache_remove(struct chfs_mount *chmp,
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struct chfs_vnode_cache* old)
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{
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struct chfs_vnode_cache** prev;
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KASSERT(mutex_owned(&chmp->chm_lock_vnocache));
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prev = &chmp->chm_vnocache_hash[old->vno % VNODECACHE_SIZE];
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while ((*prev) && (*prev)->vno < old->vno) {
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prev = &(*prev)->next;
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}
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if ((*prev) == old) {
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*prev = old->next;
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}
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if (old->state != VNO_STATE_READING &&
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old->state != VNO_STATE_CLEARING) {
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chfs_vnode_cache_free(old);
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}
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}
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/* chfs_vnocache_hash_destroy - destroying the vnode cache */
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void
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chfs_vnocache_hash_destroy(struct chfs_vnode_cache **hash)
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{
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struct chfs_vnode_cache *this, *next;
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int i;
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/* free every row */
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for (i = 0; i < VNODECACHE_SIZE; i++) {
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this = hash[i];
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while (this) {
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next = this->next;
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chfs_vnode_cache_free(this);
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this = next;
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}
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hash[i] = NULL;
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}
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}
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