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   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright (C) 2001-2003 Red Hat, Inc.
   5  *
   6  * Created by David Woodhouse <dwmw2@infradead.org>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  * $Id: malloc.c,v 1.29 2005/07/27 14:16:53 dedekind Exp $
  11  *
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/slab.h>
  16 #include <linux/init.h>
  17 #include <linux/jffs2.h>
  18 #include "nodelist.h"
  19
  20 /* These are initialised to NULL in the kernel startup code.
  21    If you're porting to other operating systems, beware */
  22 static kmem_cache_t *full_dnode_slab;
  23 static kmem_cache_t *raw_dirent_slab;
  24 static kmem_cache_t *raw_inode_slab;
  25 static kmem_cache_t *tmp_dnode_info_slab;
  26 static kmem_cache_t *raw_node_ref_slab;
  27 static kmem_cache_t *node_frag_slab;
  28 static kmem_cache_t *inode_cache_slab;
  29
  30 int __init jffs2_create_slab_caches(void)
  31 {
  32         full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
  33                                             sizeof(struct jffs2_full_dnode),
  34                                             0, 0, NULL, NULL);
  35         if (!full_dnode_slab)
  36                 goto err;
  37
  38         raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
  39                                             sizeof(struct jffs2_raw_dirent),
  40                                             0, 0, NULL, NULL);
  41         if (!raw_dirent_slab)
  42                 goto err;
  43
  44         raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
  45                                            sizeof(struct jffs2_raw_inode),
  46                                            0, 0, NULL, NULL);
  47         if (!raw_inode_slab)
  48                 goto err;
  49
  50         tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
  51                                                 sizeof(struct jffs2_tmp_dnode_info),
  52                                                 0, 0, NULL, NULL);
  53         if (!tmp_dnode_info_slab)
  54                 goto err;
  55
  56         raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref",
  57                                               sizeof(struct jffs2_raw_node_ref),
  58                                               0, 0, NULL, NULL);
  59         if (!raw_node_ref_slab)
  60                 goto err;
  61
  62         node_frag_slab = kmem_cache_create("jffs2_node_frag",
  63                                            sizeof(struct jffs2_node_frag),
  64                                            0, 0, NULL, NULL);
  65         if (!node_frag_slab)
  66                 goto err;
  67
  68         inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
  69                                              sizeof(struct jffs2_inode_cache),
  70                                              0, 0, NULL, NULL);
  71         if (inode_cache_slab)
  72                 return 0;
  73  err:
  74         jffs2_destroy_slab_caches();
  75         return -ENOMEM;
  76 }
  77
  78 void jffs2_destroy_slab_caches(void)
  79 {
  80         if(full_dnode_slab)
  81                 kmem_cache_destroy(full_dnode_slab);
  82         if(raw_dirent_slab)
  83                 kmem_cache_destroy(raw_dirent_slab);
  84         if(raw_inode_slab)
  85                 kmem_cache_destroy(raw_inode_slab);
  86         if(tmp_dnode_info_slab)
  87                 kmem_cache_destroy(tmp_dnode_info_slab);
  88         if(raw_node_ref_slab)
  89                 kmem_cache_destroy(raw_node_ref_slab);
  90         if(node_frag_slab)
  91                 kmem_cache_destroy(node_frag_slab);
  92         if(inode_cache_slab)
  93                 kmem_cache_destroy(inode_cache_slab);
  94 }
  95
  96 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
  97 {
  98         struct jffs2_full_dirent *ret;
  99         ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
 100         JFFS2_DBG_MEMALLOC("%p\n", ret);
 101         return ret;
 102 }
 103
 104 void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
 105 {
 106         JFFS2_DBG_MEMALLOC("%p\n", x);
 107         kfree(x);
 108 }
 109
 110 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
 111 {
 112         struct jffs2_full_dnode *ret;
 113         ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
 114         JFFS2_DBG_MEMALLOC("%p\n", ret);
 115         return ret;
 116 }
 117
 118 void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
 119 {
 120         JFFS2_DBG_MEMALLOC("%p\n", x);
 121         kmem_cache_free(full_dnode_slab, x);
 122 }
 123
 124 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
 125 {
 126         struct jffs2_raw_dirent *ret;
 127         ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
 128         JFFS2_DBG_MEMALLOC("%p\n", ret);
 129         return ret;
 130 }
 131
 132 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
 133 {
 134         JFFS2_DBG_MEMALLOC("%p\n", x);
 135         kmem_cache_free(raw_dirent_slab, x);
 136 }
 137
 138 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
 139 {
 140         struct jffs2_raw_inode *ret;
 141         ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
 142         JFFS2_DBG_MEMALLOC("%p\n", ret);
 143         return ret;
 144 }
 145
 146 void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
 147 {
 148         JFFS2_DBG_MEMALLOC("%p\n", x);
 149         kmem_cache_free(raw_inode_slab, x);
 150 }
 151
 152 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
 153 {
 154         struct jffs2_tmp_dnode_info *ret;
 155         ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
 156         JFFS2_DBG_MEMALLOC("%p\n",
 157                 ret);
 158         return ret;
 159 }
 160
 161 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
 162 {
 163         JFFS2_DBG_MEMALLOC("%p\n", x);
 164         kmem_cache_free(tmp_dnode_info_slab, x);
 165 }
 166
 167 struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
 168 {
 169         struct jffs2_raw_node_ref *ret;
 170         ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
 171         JFFS2_DBG_MEMALLOC("%p\n", ret);
 172         return ret;
 173 }
 174
 175 void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
 176 {
 177         JFFS2_DBG_MEMALLOC("%p\n", x);
 178         kmem_cache_free(raw_node_ref_slab, x);
 179 }
 180
 181 struct jffs2_node_frag *jffs2_alloc_node_frag(void)
 182 {
 183         struct jffs2_node_frag *ret;
 184         ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
 185         JFFS2_DBG_MEMALLOC("%p\n", ret);
 186         return ret;
 187 }
 188
 189 void jffs2_free_node_frag(struct jffs2_node_frag *x)
 190 {
 191         JFFS2_DBG_MEMALLOC("%p\n", x);
 192         kmem_cache_free(node_frag_slab, x);
 193 }
 194
 195 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
 196 {
 197         struct jffs2_inode_cache *ret;
 198         ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
 199         JFFS2_DBG_MEMALLOC("%p\n", ret);
 200         return ret;
 201 }
 202
 203 void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
 204 {
 205         JFFS2_DBG_MEMALLOC("%p\n", x);
 206         kmem_cache_free(inode_cache_slab, x);
 207 }