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 1.31 2005/11/07 11:14:40 gleixner 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 #ifdef CONFIG_JFFS2_FS_XATTR 30 static kmem_cache_t *xattr_datum_cache; 31 static kmem_cache_t *xattr_ref_cache; 32 #endif 33 34 int __init jffs2_create_slab_caches(void) 35 { 36 full_dnode_slab = kmem_cache_create("jffs2_full_dnode", 37 sizeof(struct jffs2_full_dnode), 38 0, 0, NULL, NULL); 39 if (!full_dnode_slab) 40 goto err; 41 42 raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent", 43 sizeof(struct jffs2_raw_dirent), 44 0, 0, NULL, NULL); 45 if (!raw_dirent_slab) 46 goto err; 47 48 raw_inode_slab = kmem_cache_create("jffs2_raw_inode", 49 sizeof(struct jffs2_raw_inode), 50 0, 0, NULL, NULL); 51 if (!raw_inode_slab) 52 goto err; 53 54 tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode", 55 sizeof(struct jffs2_tmp_dnode_info), 56 0, 0, NULL, NULL); 57 if (!tmp_dnode_info_slab) 58 goto err; 59 60 raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref", 61 sizeof(struct jffs2_raw_node_ref), 62 0, 0, NULL, NULL); 63 if (!raw_node_ref_slab) 64 goto err; 65 66 node_frag_slab = kmem_cache_create("jffs2_node_frag", 67 sizeof(struct jffs2_node_frag), 68 0, 0, NULL, NULL); 69 if (!node_frag_slab) 70 goto err; 71 72 inode_cache_slab = kmem_cache_create("jffs2_inode_cache", 73 sizeof(struct jffs2_inode_cache), 74 0, 0, NULL, NULL); 75 if (!inode_cache_slab) 76 goto err; 77 78 #ifdef CONFIG_JFFS2_FS_XATTR 79 xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum", 80 sizeof(struct jffs2_xattr_datum), 81 0, 0, NULL, NULL); 82 if (!xattr_datum_cache) 83 goto err; 84 85 xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref", 86 sizeof(struct jffs2_xattr_ref), 87 0, 0, NULL, NULL); 88 if (!xattr_ref_cache) 89 goto err; 90 #endif 91 92 return 0; 93 err: 94 jffs2_destroy_slab_caches(); 95 return -ENOMEM; 96 } 97 98 void jffs2_destroy_slab_caches(void) 99 { 100 if(full_dnode_slab) 101 kmem_cache_destroy(full_dnode_slab); 102 if(raw_dirent_slab) 103 kmem_cache_destroy(raw_dirent_slab); 104 if(raw_inode_slab) 105 kmem_cache_destroy(raw_inode_slab); 106 if(tmp_dnode_info_slab) 107 kmem_cache_destroy(tmp_dnode_info_slab); 108 if(raw_node_ref_slab) 109 kmem_cache_destroy(raw_node_ref_slab); 110 if(node_frag_slab) 111 kmem_cache_destroy(node_frag_slab); 112 if(inode_cache_slab) 113 kmem_cache_destroy(inode_cache_slab); 114 #ifdef CONFIG_JFFS2_FS_XATTR 115 if (xattr_datum_cache) 116 kmem_cache_destroy(xattr_datum_cache); 117 if (xattr_ref_cache) 118 kmem_cache_destroy(xattr_ref_cache); 119 #endif 120 } 121 122 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) 123 { 124 struct jffs2_full_dirent *ret; 125 ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); 126 dbg_memalloc("%p\n", ret); 127 return ret; 128 } 129 130 void jffs2_free_full_dirent(struct jffs2_full_dirent *x) 131 { 132 dbg_memalloc("%p\n", x); 133 kfree(x); 134 } 135 136 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) 137 { 138 struct jffs2_full_dnode *ret; 139 ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); 140 dbg_memalloc("%p\n", ret); 141 return ret; 142 } 143 144 void jffs2_free_full_dnode(struct jffs2_full_dnode *x) 145 { 146 dbg_memalloc("%p\n", x); 147 kmem_cache_free(full_dnode_slab, x); 148 } 149 150 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) 151 { 152 struct jffs2_raw_dirent *ret; 153 ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); 154 dbg_memalloc("%p\n", ret); 155 return ret; 156 } 157 158 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) 159 { 160 dbg_memalloc("%p\n", x); 161 kmem_cache_free(raw_dirent_slab, x); 162 } 163 164 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) 165 { 166 struct jffs2_raw_inode *ret; 167 ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); 168 dbg_memalloc("%p\n", ret); 169 return ret; 170 } 171 172 void jffs2_free_raw_inode(struct jffs2_raw_inode *x) 173 { 174 dbg_memalloc("%p\n", x); 175 kmem_cache_free(raw_inode_slab, x); 176 } 177 178 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) 179 { 180 struct jffs2_tmp_dnode_info *ret; 181 ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); 182 dbg_memalloc("%p\n", 183 ret); 184 return ret; 185 } 186 187 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) 188 { 189 dbg_memalloc("%p\n", x); 190 kmem_cache_free(tmp_dnode_info_slab, x); 191 } 192 193 struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void) 194 { 195 struct jffs2_raw_node_ref *ret; 196 ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); 197 dbg_memalloc("%p\n", ret); 198 return ret; 199 } 200 201 void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x) 202 { 203 dbg_memalloc("%p\n", x); 204 kmem_cache_free(raw_node_ref_slab, x); 205 } 206 207 struct jffs2_node_frag *jffs2_alloc_node_frag(void) 208 { 209 struct jffs2_node_frag *ret; 210 ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); 211 dbg_memalloc("%p\n", ret); 212 return ret; 213 } 214 215 void jffs2_free_node_frag(struct jffs2_node_frag *x) 216 { 217 dbg_memalloc("%p\n", x); 218 kmem_cache_free(node_frag_slab, x); 219 } 220 221 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) 222 { 223 struct jffs2_inode_cache *ret; 224 ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); 225 dbg_memalloc("%p\n", ret); 226 return ret; 227 } 228 229 void jffs2_free_inode_cache(struct jffs2_inode_cache *x) 230 { 231 dbg_memalloc("%p\n", x); 232 kmem_cache_free(inode_cache_slab, x); 233 } 234 235 #ifdef CONFIG_JFFS2_FS_XATTR 236 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void) 237 { 238 struct jffs2_xattr_datum *xd; 239 xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL); 240 dbg_memalloc("%p\n", xd); 241 242 memset(xd, 0, sizeof(struct jffs2_xattr_datum)); 243 xd->class = RAWNODE_CLASS_XATTR_DATUM; 244 INIT_LIST_HEAD(&xd->xindex); 245 return xd; 246 } 247 248 void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd) 249 { 250 dbg_memalloc("%p\n", xd); 251 kmem_cache_free(xattr_datum_cache, xd); 252 } 253 254 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void) 255 { 256 struct jffs2_xattr_ref *ref; 257 ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL); 258 dbg_memalloc("%p\n", ref); 259 260 memset(ref, 0, sizeof(struct jffs2_xattr_ref)); 261 ref->class = RAWNODE_CLASS_XATTR_REF; 262 INIT_LIST_HEAD(&ref->ilist); 263 return ref; 264 } 265 266 void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref) 267 { 268 dbg_memalloc("%p\n", ref); 269 kmem_cache_free(xattr_ref_cache, ref); 270 } 271 #endif 272