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 } 208