malloc.c
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上传日期:2013-04-10
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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 1.16 2001/03/15 15:38:24 dwmw2 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 %pn", ret));
- return ret;
- }
- void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
- {
- D1(printk(KERN_DEBUG "Freeing inocache at %pn", x));
- kmem_cache_free(inode_cache_slab, x);
- }