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/* $NetBSD: chfs_pool.c,v 1.2 2012/02/28 02:48:39 christos Exp $ */
/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Pool allocator and convenience routines for chfs.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/pool.h>
#include <sys/atomic.h>
#include <uvm/uvm.h>
#include "chfs.h"
//#include </root/xipffs/netbsd.chfs/chfs.h>
/* --------------------------------------------------------------------- */
void * chfs_pool_page_alloc(struct pool *, int);
void chfs_pool_page_free(struct pool *, void *);
/* --------------------------------------------------------------------- */
struct pool_allocator chfs_pool_allocator = {
.pa_alloc = chfs_pool_page_alloc,
.pa_free = chfs_pool_page_free,
};
/* --------------------------------------------------------------------- */
void
chfs_pool_init(struct chfs_pool *chpp, size_t size, const char *what,
struct chfs_mount *chmp)
{
int cnt;
cnt = snprintf(chpp->chp_name, sizeof(chpp->chp_name),
"%s_chfs_%p", what, chmp);
KASSERT(cnt < sizeof(chpp->chp_name));
pool_init(&chpp->chp_pool, size, 0, 0, 0, chpp->chp_name,
&chfs_pool_allocator, IPL_NONE);
chpp->chp_mount = chmp;
}
/* --------------------------------------------------------------------- */
void
chfs_pool_destroy(struct chfs_pool *chpp)
{
pool_destroy((struct pool *)chpp);
}
/* --------------------------------------------------------------------- */
void *
chfs_pool_page_alloc(struct pool *pp, int flags)
{
struct chfs_pool *chpp;
struct chfs_mount *chmp;
unsigned int pages;
void *page;
dbg("CHFS: pool_page_alloc()\n");
chpp = (struct chfs_pool *)pp;
chmp = chpp->chp_mount;
pages = atomic_inc_uint_nv(&chmp->chm_pages_used);
if (pages >= CHFS_PAGES_MAX(chmp)) {
atomic_dec_uint(&chmp->chm_pages_used);
return NULL;
}
page = pool_get(pp, flags | PR_WAITOK);
if (page == NULL) {
atomic_dec_uint(&chmp->chm_pages_used);
}
return page;
}
/* --------------------------------------------------------------------- */
void
chfs_pool_page_free(struct pool *pp, void *v)
{
struct chfs_pool *chpp;
struct chfs_mount *chmp;
dbg("CHFS: pool_page_free()\n");
chpp = (struct chfs_pool *)pp;
chmp = chpp->chp_mount;
atomic_dec_uint(&chmp->chm_pages_used);
pool_put(pp,v);
}
/* --------------------------------------------------------------------- */
void
chfs_str_pool_init(struct chfs_str_pool *chsp, struct chfs_mount *chmp)
{
dbg("CHFS: str_pool_init()\n");
chfs_pool_init(&chsp->chsp_pool_16, 16, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_32, 32, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_64, 64, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_128, 128, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_256, 256, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_512, 512, "str", chmp);
chfs_pool_init(&chsp->chsp_pool_1024, 1024, "str", chmp);
}
/* --------------------------------------------------------------------- */
void
chfs_str_pool_destroy(struct chfs_str_pool *chsp)
{
dbg("CHFS: str_pool_destroy()\n");
chfs_pool_destroy(&chsp->chsp_pool_16);
chfs_pool_destroy(&chsp->chsp_pool_32);
chfs_pool_destroy(&chsp->chsp_pool_64);
chfs_pool_destroy(&chsp->chsp_pool_128);
chfs_pool_destroy(&chsp->chsp_pool_256);
chfs_pool_destroy(&chsp->chsp_pool_512);
chfs_pool_destroy(&chsp->chsp_pool_1024);
}
/* --------------------------------------------------------------------- */
char *
chfs_str_pool_get(struct chfs_str_pool *chsp, size_t len, int flags)
{
struct chfs_pool *p;
dbg("CHFS: str_pool_get()\n");
KASSERT(len <= 1024);
if (len <= 16) p = &chsp->chsp_pool_16;
else if (len <= 32) p = &chsp->chsp_pool_32;
else if (len <= 64) p = &chsp->chsp_pool_64;
else if (len <= 128) p = &chsp->chsp_pool_128;
else if (len <= 256) p = &chsp->chsp_pool_256;
else if (len <= 512) p = &chsp->chsp_pool_512;
else if (len <= 1024) p = &chsp->chsp_pool_1024;
else {
KASSERT(0);
p = NULL; /* Silence compiler warnings */
}
return (char *)CHFS_POOL_GET(p, flags);
}
/* --------------------------------------------------------------------- */
void
chfs_str_pool_put(struct chfs_str_pool *chsp, char *str, size_t len)
{
struct chfs_pool *p;
dbg("CHFS: str_pool_put()\n");
KASSERT(len <= 1024);
if (len <= 16) p = &chsp->chsp_pool_16;
else if (len <= 32) p = &chsp->chsp_pool_32;
else if (len <= 64) p = &chsp->chsp_pool_64;
else if (len <= 128) p = &chsp->chsp_pool_128;
else if (len <= 256) p = &chsp->chsp_pool_256;
else if (len <= 512) p = &chsp->chsp_pool_512;
else if (len <= 1024) p = &chsp->chsp_pool_1024;
else {
KASSERT(0);
p = NULL; /* Silence compiler warnings */
}
CHFS_POOL_PUT(p, str);
}
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