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/******************************************************************************
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
** of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/
#include "dlm_internal.h"
#include "config.h"
static kmem_cache_t *lkb_cache;
static kmem_cache_t *lvb_cache;
int dlm_memory_init(void)
{
int ret = -ENOMEM;
lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
__alignof__(struct dlm_lkb), 0, NULL, NULL);
if (!lkb_cache)
goto out;
lvb_cache = kmem_cache_create("dlm_lvb", DLM_LVB_LEN,
__alignof__(uint64_t), 0, NULL, NULL);
if (!lvb_cache)
goto out_lkb;
return 0;
out_lkb:
kmem_cache_destroy(lkb_cache);
out:
return ret;
}
void dlm_memory_exit(void)
{
kmem_cache_destroy(lkb_cache);
kmem_cache_destroy(lvb_cache);
}
/* FIXME: have some minimal space built-in to rsb for the name and
kmalloc a separate name if needed, like dentries are done */
struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen)
{
struct dlm_rsb *r;
DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
r = kmalloc(sizeof(*r) + namelen, GFP_KERNEL);
if (r)
memset(r, 0, sizeof(*r) + namelen);
return r;
}
void free_rsb(struct dlm_rsb *r)
{
kfree(r);
}
struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
{
struct dlm_lkb *lkb;
lkb = kmem_cache_alloc(lkb_cache, GFP_KERNEL);
if (lkb)
memset(lkb, 0, sizeof(*lkb));
return lkb;
}
void free_lkb(struct dlm_lkb *lkb)
{
kmem_cache_free(lkb_cache, lkb);
}
struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen)
{
struct dlm_direntry *de;
DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL);
if (de)
memset(de, 0, sizeof(*de) + namelen);
return de;
}
void free_direntry(struct dlm_direntry *de)
{
kfree(de);
}
char *allocate_lvb(struct dlm_ls *ls)
{
char *l;
l = kmem_cache_alloc(lvb_cache, GFP_KERNEL);
if (l)
memset(l, 0, DLM_LVB_LEN);
return l;
}
void free_lvb(char *l)
{
kmem_cache_free(lvb_cache, l);
}
/* use lvb cache since they are the same size */
uint64_t *allocate_range(struct dlm_ls *ls)
{
uint64_t *p;
p = kmem_cache_alloc(lvb_cache, GFP_KERNEL);
if (p)
memset(p, 0, 4*sizeof(uint64_t));
return p;
}
void free_range(uint64_t *l)
{
kmem_cache_free(lvb_cache, l);
}

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