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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"

#include "memory.h"

static struct kmem_cache *lkb_cache;

int dlm_memory_init(void)

{

        int ret = 0;

        lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),

                                __alignof__(struct dlm_lkb), 0, NULL);

        if (!lkb_cache)

                ret = -ENOMEM;

        return ret;

}

void dlm_memory_exit(void)

{

        if (lkb_cache)

                kmem_cache_destroy(lkb_cache);

}

char *allocate_lvb(struct dlm_ls *ls)

{

        char *p;

        p = kzalloc(ls->ls_lvblen, GFP_KERNEL);

        return p;

}

void free_lvb(char *p)

{

        kfree(p);

}

/* 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 = kzalloc(sizeof(*r) + namelen, GFP_KERNEL);

        return r;

}

void free_rsb(struct dlm_rsb *r)

{

        if (r->res_lvbptr)

                free_lvb(r->res_lvbptr);

        kfree(r);

}

struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)

{

        struct dlm_lkb *lkb;

        lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL);

        return lkb;

}

void free_lkb(struct dlm_lkb *lkb)

{

        if (lkb->lkb_flags & DLM_IFL_USER) {

                struct dlm_user_args *ua;

                ua = (struct dlm_user_args *)lkb->lkb_astparam;

                if (ua) {

                        if (ua->lksb.sb_lvbptr)

                                kfree(ua->lksb.sb_lvbptr);

                        kfree(ua);

                }

        }

        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,

                   printk("namelen = %d\n", namelen););

        de = kzalloc(sizeof(*de) + namelen, GFP_KERNEL);

        return de;

}

void free_direntry(struct dlm_direntry *de)

{

        kfree(de);

}