fs/jffs2/malloc.c

   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 1.28 2004/11/16 20:36:11 dwmw2 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 #if 0
  21 #define JFFS2_SLAB_POISON SLAB_POISON
  22 #else
  23 #define JFFS2_SLAB_POISON 0
  24 #endif
  25
  26 // replace this by #define D3 (x) x for cache debugging
  27 #define D3(x)
  28
  29 /* These are initialised to NULL in the kernel startup code.
  30    If you're porting to other operating systems, beware */
  31 static kmem_cache_t *full_dnode_slab;
  32 static kmem_cache_t *raw_dirent_slab;
  33 static kmem_cache_t *raw_inode_slab;
  34 static kmem_cache_t *tmp_dnode_info_slab;
  35 static kmem_cache_t *raw_node_ref_slab;
  36 static kmem_cache_t *node_frag_slab;
  37 static kmem_cache_t *inode_cache_slab;
  38
  39 int __init jffs2_create_slab_caches(void)
  40 {
  41         full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
  42                                             sizeof(struct jffs2_full_dnode),
  43                                             0, JFFS2_SLAB_POISON, NULL, NULL);
  44         if (!full_dnode_slab)
  45                 goto err;
  46
  47         raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
  48                                             sizeof(struct jffs2_raw_dirent),
  49                                             0, JFFS2_SLAB_POISON, NULL, NULL);
  50         if (!raw_dirent_slab)
  51                 goto err;
  52
  53         raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
  54                                            sizeof(struct jffs2_raw_inode),
  55                                            0, JFFS2_SLAB_POISON, NULL, NULL);
  56         if (!raw_inode_slab)
  57                 goto err;
  58
  59         tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
  60                                                 sizeof(struct jffs2_tmp_dnode_info),
  61                                                 0, JFFS2_SLAB_POISON, NULL, NULL);
  62         if (!tmp_dnode_info_slab)
  63                 goto err;
  64
  65         raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref",
  66                                               sizeof(struct jffs2_raw_node_ref),
  67                                               0, JFFS2_SLAB_POISON, NULL, NULL);
  68         if (!raw_node_ref_slab)
  69                 goto err;
  70
  71         node_frag_slab = kmem_cache_create("jffs2_node_frag",
  72                                            sizeof(struct jffs2_node_frag),
  73                                            0, JFFS2_SLAB_POISON, NULL, NULL);
  74         if (!node_frag_slab)
  75                 goto err;
  76
  77         inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
  78                                              sizeof(struct jffs2_inode_cache),
  79                                              0, JFFS2_SLAB_POISON, NULL, NULL);
  80         if (inode_cache_slab)
  81                 return 0;
  82  err:
  83         jffs2_destroy_slab_caches();
  84         return -ENOMEM;
  85 }
  86
  87 void jffs2_destroy_slab_caches(void)
  88 {
  89         if(full_dnode_slab)
  90                 kmem_cache_destroy(full_dnode_slab);
  91         if(raw_dirent_slab)
  92                 kmem_cache_destroy(raw_dirent_slab);
  93         if(raw_inode_slab)
  94                 kmem_cache_destroy(raw_inode_slab);
  95         if(tmp_dnode_info_slab)
  96                 kmem_cache_destroy(tmp_dnode_info_slab);
  97         if(raw_node_ref_slab)
  98                 kmem_cache_destroy(raw_node_ref_slab);
  99         if(node_frag_slab)
 100                 kmem_cache_destroy(node_frag_slab);
 101         if(inode_cache_slab)
 102                 kmem_cache_destroy(inode_cache_slab);
 103 }
 104
 105 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
 106 {
 107         return kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
 108 }
 109
 110 void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
 111 {
 112         kfree(x);
 113 }
 114
 115 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
 116 {
 117         struct jffs2_full_dnode *ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
 118         D3 (printk (KERN_DEBUG "alloc_full_dnode at %p\n", ret));
 119         return ret;
 120 }
 121
 122 void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
 123 {
 124         D3 (printk (KERN_DEBUG "free full_dnode at %p\n", x));
 125         kmem_cache_free(full_dnode_slab, x);
 126 }
 127
 128 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
 129 {
 130         struct jffs2_raw_dirent *ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
 131         D3 (printk (KERN_DEBUG "alloc_raw_dirent\n", ret));
 132         return ret;
 133 }
 134
 135 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
 136 {
 137         D3 (printk (KERN_DEBUG "free_raw_dirent at %p\n", x));
 138         kmem_cache_free(raw_dirent_slab, x);
 139 }
 140
 141 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
 142 {
 143         struct jffs2_raw_inode *ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
 144         D3 (printk (KERN_DEBUG "alloc_raw_inode at %p\n", ret));
 145         return ret;
 146 }
 147
 148 void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
 149 {
 150         D3 (printk (KERN_DEBUG "free_raw_inode at %p\n", x));
 151         kmem_cache_free(raw_inode_slab, x);
 152 }
 153
 154 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
 155 {
 156         struct jffs2_tmp_dnode_info *ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
 157         D3 (printk (KERN_DEBUG "alloc_tmp_dnode_info at %p\n", ret));
 158         return ret;
 159 }
 160
 161 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
 162 {
 163         D3 (printk (KERN_DEBUG "free_tmp_dnode_info at %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 = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
 170         D3 (printk (KERN_DEBUG "alloc_raw_node_ref at %p\n", ret));
 171         return ret;
 172 }
 173
 174 void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
 175 {
 176         D3 (printk (KERN_DEBUG "free_raw_node_ref at %p\n", x));
 177         kmem_cache_free(raw_node_ref_slab, x);
 178 }
 179
 180 struct jffs2_node_frag *jffs2_alloc_node_frag(void)
 181 {
 182         struct jffs2_node_frag *ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
 183         D3 (printk (KERN_DEBUG "alloc_node_frag at %p\n", ret));
 184         return ret;
 185 }
 186
 187 void jffs2_free_node_frag(struct jffs2_node_frag *x)
 188 {
 189         D3 (printk (KERN_DEBUG "free_node_frag at %p\n", x));
 190         kmem_cache_free(node_frag_slab, x);
 191 }
 192
 193 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
 194 {
 195         struct jffs2_inode_cache *ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
 196         D3 (printk(KERN_DEBUG "Allocated inocache at %p\n", ret));
 197         return ret;
 198 }
 199
 200 void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
 201 {
 202         D3 (printk(KERN_DEBUG "Freeing inocache at %p\n", x));
 203         kmem_cache_free(inode_cache_slab, x);
 204 }
 205