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/*

 * JFFS2 -- Journalling Flash File System, Version 2.

 *

 * Copyright (C) 2001 Red Hat, Inc.

 *

 * Created by David Woodhouse <dwmw2@cambridge.redhat.com>

 *

 * The original JFFS, from which the design for JFFS2 was derived,

 * was designed and implemented by Axis Communications AB.

 *

 * The contents of this file are subject to the Red Hat eCos Public

 * License Version 1.1 (the "Licence"); you may not use this file

 * except in compliance with the Licence.  You may obtain a copy of

 * the Licence at http://www.redhat.com/

 *

 * Software distributed under the Licence is distributed on an "AS IS"

 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.

 * See the Licence for the specific language governing rights and

 * limitations under the Licence.

 *

 * The Original Code is JFFS2 - Journalling Flash File System, version 2

 *

 * Alternatively, the contents of this file may be used under the

 * terms of the GNU General Public License version 2 (the "GPL"), in

 * which case the provisions of the GPL are applicable instead of the

 * above.  If you wish to allow the use of your version of this file

 * only under the terms of the GPL and not to allow others to use your

 * version of this file under the RHEPL, indicate your decision by

 * deleting the provisions above and replace them with the notice and

 * other provisions required by the GPL.  If you do not delete the

 * provisions above, a recipient may use your version of this file

 * under either the RHEPL or the GPL.

 *

 * $Id: malloc.c,v 1.1.1.1 2004-04-15 01:11:04 phoenix Exp $

 *

 */

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/jffs2.h>

#include "nodelist.h"

#if 0

#define JFFS2_SLAB_POISON SLAB_POISON

#else

#define JFFS2_SLAB_POISON 0

#endif

/* These are initialised to NULL in the kernel startup code.

   If you're porting to other operating systems, beware */

static kmem_cache_t *full_dnode_slab;

static kmem_cache_t *raw_dirent_slab;

static kmem_cache_t *raw_inode_slab;

static kmem_cache_t *tmp_dnode_info_slab;

static kmem_cache_t *raw_node_ref_slab;

static kmem_cache_t *node_frag_slab;

static kmem_cache_t *inode_cache_slab;

void jffs2_free_tmp_dnode_info_list(struct jffs2_tmp_dnode_info *tn)

{

        struct jffs2_tmp_dnode_info *next;

        while (tn) {

                next = tn;

                tn = tn->next;

                jffs2_free_full_dnode(next->fn);

                jffs2_free_tmp_dnode_info(next);

        }

}

void jffs2_free_full_dirent_list(struct jffs2_full_dirent *fd)

{

        struct jffs2_full_dirent *next;

        while (fd) {

                next = fd->next;

                jffs2_free_full_dirent(fd);

                fd = next;

        }

}

int __init jffs2_create_slab_caches(void)

{

        full_dnode_slab = kmem_cache_create("jffs2_full_dnode", sizeof(struct jffs2_full_dnode), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!full_dnode_slab)

                goto err;

        raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent", sizeof(struct jffs2_raw_dirent), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!raw_dirent_slab)

                goto err;

        raw_inode_slab = kmem_cache_create("jffs2_raw_inode", sizeof(struct jffs2_raw_inode), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!raw_inode_slab)

                goto err;

        tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode", sizeof(struct jffs2_tmp_dnode_info), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!tmp_dnode_info_slab)

                goto err;

        raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref", sizeof(struct jffs2_raw_node_ref), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!raw_node_ref_slab)

                goto err;

        node_frag_slab = kmem_cache_create("jffs2_node_frag", sizeof(struct jffs2_node_frag), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (!node_frag_slab)

                goto err;

        inode_cache_slab = kmem_cache_create("jffs2_inode_cache", sizeof(struct jffs2_inode_cache), 0, JFFS2_SLAB_POISON, NULL, NULL);

        if (inode_cache_slab)

                return 0;

 err:

        jffs2_destroy_slab_caches();

        return -ENOMEM;

}

void jffs2_destroy_slab_caches(void)

{

        if(full_dnode_slab)

                kmem_cache_destroy(full_dnode_slab);

        if(raw_dirent_slab)

                kmem_cache_destroy(raw_dirent_slab);

        if(raw_inode_slab)

                kmem_cache_destroy(raw_inode_slab);

        if(tmp_dnode_info_slab)

                kmem_cache_destroy(tmp_dnode_info_slab);

        if(raw_node_ref_slab)

                kmem_cache_destroy(raw_node_ref_slab);

        if(node_frag_slab)

                kmem_cache_destroy(node_frag_slab);

        if(inode_cache_slab)

                kmem_cache_destroy(inode_cache_slab);

}

struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)

{

        return kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);

}

void jffs2_free_full_dirent(struct jffs2_full_dirent *x)

{

        kfree(x);

}

struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)

{

        void *ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);

        return ret;

}

void jffs2_free_full_dnode(struct jffs2_full_dnode *x)

{

        kmem_cache_free(full_dnode_slab, x);

}

struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)

{

        return kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);

}

void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)

{

        kmem_cache_free(raw_dirent_slab, x);

}

struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)

{

        return kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);

}

void jffs2_free_raw_inode(struct jffs2_raw_inode *x)

{

        kmem_cache_free(raw_inode_slab, x);

}

struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)

{

        return kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);

}

void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)

{

        kmem_cache_free(tmp_dnode_info_slab, x);

}

struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)

{

        return kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);

}

void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)

{

        kmem_cache_free(raw_node_ref_slab, x);

}

struct jffs2_node_frag *jffs2_alloc_node_frag(void)

{

        return kmem_cache_alloc(node_frag_slab, GFP_KERNEL);

}

void jffs2_free_node_frag(struct jffs2_node_frag *x)

{

        kmem_cache_free(node_frag_slab, x);

}

struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)

{

        struct jffs2_inode_cache *ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);

        D1(printk(KERN_DEBUG "Allocated inocache at %p\n", ret));

        return ret;

}

void jffs2_free_inode_cache(struct jffs2_inode_cache *x)

{

        D1(printk(KERN_DEBUG "Freeing inocache at %p\n", x));

        kmem_cache_free(inode_cache_slab, x);

}