nfs4_acache.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <nfs/nfs4_clnt.h>
/*
* Access cache
*/
static acache4_hash_t *acache4;
static long nacache; /* used strictly to size the number of hash queues */
static int acache4size;
static int acache4mask;
static struct kmem_cache *acache4_cache;
static int acache4_hashlen = 4;
/*
* This probably needs to be larger than or equal to
* log2(sizeof (struct rnode)) due to the way that rnodes are
* allocated.
*/
#define ACACHE4_SHIFT_BITS 9
static int
{
}
#ifdef DEBUG
static long nfs4_access_cache_hits = 0;
static long nfs4_access_cache_misses = 0;
#endif
{
return (NFS4_ACCESS_UNKNOWN);
#ifdef DEBUG
#endif
else
} else {
#ifdef DEBUG
#endif
}
return (all);
}
}
}
#ifdef DEBUG
#endif
return (NFS4_ACCESS_UNKNOWN);
}
void
{
/*
* Allocate now assuming that mostly an allocation will be
* required. This allows the allocation to happen without
* holding the hash bucket locked.
*/
}
}
return;
}
}
}
#ifdef DEBUG
#endif
}
}
int
{
/*
* If there aren't any cached entries, then there is nothing
* to free.
*/
return (0);
/*
* Loop through each entry in the list pointed to in the
* rnode. Remove each of these entries from the hash
* queue that it is on and remove it from the list in
* the rnode.
*/
#ifdef DEBUG
#endif
}
return (1);
}
int
nfs4_acache_init(void)
{
extern int rtable4size;
int i;
/*
* Initial guess is one access cache entry per rnode unless
* nacache is set to a non-zero value and then it is used to
* indicate a guess at the number of access cache entries.
*/
if (nacache > 0)
else
for (i = 0; i < acache4size; i++) {
}
return (0);
}
int
nfs4_acache_fini(void)
{
int i;
/*
* Deallocated the access cache
*/
for (i = 0; i < acache4size; i++)
return (0);
}