2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2001-2003 Red Hat, Inc.
6 * Created by David Woodhouse <dwmw2@infradead.org>
8 * For licensing information, see the file 'LICENCE' in this directory.
10 * $Id: malloc.c,v 1.31 2005/11/07 11:14:40 gleixner Exp $
14 #include <linux/kernel.h>
15 #include <linux/slab.h>
16 #include <linux/init.h>
17 #include <linux/jffs2.h>
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;
34 int __init jffs2_create_slab_caches(void)
36 full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
37 sizeof(struct jffs2_full_dnode),
42 raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
43 sizeof(struct jffs2_raw_dirent),
48 raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
49 sizeof(struct jffs2_raw_inode),
54 tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
55 sizeof(struct jffs2_tmp_dnode_info),
57 if (!tmp_dnode_info_slab)
60 raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref",
61 sizeof(struct jffs2_raw_node_ref),
63 if (!raw_node_ref_slab)
66 node_frag_slab = kmem_cache_create("jffs2_node_frag",
67 sizeof(struct jffs2_node_frag),
72 inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
73 sizeof(struct jffs2_inode_cache),
75 if (!inode_cache_slab)
78 #ifdef CONFIG_JFFS2_FS_XATTR
79 xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
80 sizeof(struct jffs2_xattr_datum),
82 if (!xattr_datum_cache)
85 xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
86 sizeof(struct jffs2_xattr_ref),
94 jffs2_destroy_slab_caches();
98 void jffs2_destroy_slab_caches(void)
101 kmem_cache_destroy(full_dnode_slab);
103 kmem_cache_destroy(raw_dirent_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);
111 kmem_cache_destroy(node_frag_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);
118 kmem_cache_destroy(xattr_ref_cache);
122 struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
124 struct jffs2_full_dirent *ret;
125 ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
126 dbg_memalloc("%p\n", ret);
130 void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
132 dbg_memalloc("%p\n", x);
136 struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
138 struct jffs2_full_dnode *ret;
139 ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
140 dbg_memalloc("%p\n", ret);
144 void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
146 dbg_memalloc("%p\n", x);
147 kmem_cache_free(full_dnode_slab, x);
150 struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
152 struct jffs2_raw_dirent *ret;
153 ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
154 dbg_memalloc("%p\n", ret);
158 void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
160 dbg_memalloc("%p\n", x);
161 kmem_cache_free(raw_dirent_slab, x);
164 struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
166 struct jffs2_raw_inode *ret;
167 ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
168 dbg_memalloc("%p\n", ret);
172 void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
174 dbg_memalloc("%p\n", x);
175 kmem_cache_free(raw_inode_slab, x);
178 struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
180 struct jffs2_tmp_dnode_info *ret;
181 ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
187 void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
189 dbg_memalloc("%p\n", x);
190 kmem_cache_free(tmp_dnode_info_slab, x);
193 int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, int nr)
195 struct jffs2_raw_node_ref *p = c->refs;
197 dbg_memalloc("%d\n", nr);
204 p = __jffs2_alloc_raw_node_ref();
207 p->next_in_ino = c->refs;
211 c->reserved_refs = nr;
215 struct jffs2_raw_node_ref *__jffs2_alloc_raw_node_ref(void)
217 struct jffs2_raw_node_ref *ret;
218 ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
219 dbg_memalloc("%p\n", ret);
223 void __jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
225 dbg_memalloc("%p\n", x);
226 kmem_cache_free(raw_node_ref_slab, x);
229 struct jffs2_node_frag *jffs2_alloc_node_frag(void)
231 struct jffs2_node_frag *ret;
232 ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
233 dbg_memalloc("%p\n", ret);
237 void jffs2_free_node_frag(struct jffs2_node_frag *x)
239 dbg_memalloc("%p\n", x);
240 kmem_cache_free(node_frag_slab, x);
243 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
245 struct jffs2_inode_cache *ret;
246 ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
247 dbg_memalloc("%p\n", ret);
251 void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
253 dbg_memalloc("%p\n", x);
254 kmem_cache_free(inode_cache_slab, x);
257 #ifdef CONFIG_JFFS2_FS_XATTR
258 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
260 struct jffs2_xattr_datum *xd;
261 xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
262 dbg_memalloc("%p\n", xd);
264 memset(xd, 0, sizeof(struct jffs2_xattr_datum));
265 xd->class = RAWNODE_CLASS_XATTR_DATUM;
266 INIT_LIST_HEAD(&xd->xindex);
270 void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
272 dbg_memalloc("%p\n", xd);
273 kmem_cache_free(xattr_datum_cache, xd);
276 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
278 struct jffs2_xattr_ref *ref;
279 ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
280 dbg_memalloc("%p\n", ref);
282 memset(ref, 0, sizeof(struct jffs2_xattr_ref));
283 ref->class = RAWNODE_CLASS_XATTR_REF;
287 void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
289 dbg_memalloc("%p\n", ref);
290 kmem_cache_free(xattr_ref_cache, ref);