ia64/linux-2.6.18-xen.hg

view fs/jffs2/malloc.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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 */
14 #include <linux/kernel.h>
15 #include <linux/slab.h>
16 #include <linux/init.h>
17 #include <linux/jffs2.h>
18 #include "nodelist.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;
32 #endif
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;
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;
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;
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;
60 raw_node_ref_slab = kmem_cache_create("jffs2_refblock",
61 sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1),
62 0, 0, NULL, NULL);
63 if (!raw_node_ref_slab)
64 goto err;
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;
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;
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;
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
92 return 0;
93 err:
94 jffs2_destroy_slab_caches();
95 return -ENOMEM;
96 }
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 }
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 }
130 void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
131 {
132 dbg_memalloc("%p\n", x);
133 kfree(x);
134 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
193 static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
194 {
195 struct jffs2_raw_node_ref *ret;
197 ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
198 if (ret) {
199 int i = 0;
200 for (i=0; i < REFS_PER_BLOCK; i++) {
201 ret[i].flash_offset = REF_EMPTY_NODE;
202 ret[i].next_in_ino = NULL;
203 }
204 ret[i].flash_offset = REF_LINK_NODE;
205 ret[i].next_in_ino = NULL;
206 }
207 return ret;
208 }
210 int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
211 struct jffs2_eraseblock *jeb, int nr)
212 {
213 struct jffs2_raw_node_ref **p, *ref;
214 int i = nr;
216 dbg_memalloc("%d\n", nr);
218 p = &jeb->last_node;
219 ref = *p;
221 dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);
223 /* If jeb->last_node is really a valid node then skip over it */
224 if (ref && ref->flash_offset != REF_EMPTY_NODE)
225 ref++;
227 while (i) {
228 if (!ref) {
229 dbg_memalloc("Allocating new refblock linked from %p\n", p);
230 ref = *p = jffs2_alloc_refblock();
231 if (!ref)
232 return -ENOMEM;
233 }
234 if (ref->flash_offset == REF_LINK_NODE) {
235 p = &ref->next_in_ino;
236 ref = *p;
237 continue;
238 }
239 i--;
240 ref++;
241 }
242 jeb->allocated_refs = nr;
244 dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n",
245 nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset,
246 jeb->last_node->next_in_ino);
248 return 0;
249 }
251 void jffs2_free_refblock(struct jffs2_raw_node_ref *x)
252 {
253 dbg_memalloc("%p\n", x);
254 kmem_cache_free(raw_node_ref_slab, x);
255 }
257 struct jffs2_node_frag *jffs2_alloc_node_frag(void)
258 {
259 struct jffs2_node_frag *ret;
260 ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
261 dbg_memalloc("%p\n", ret);
262 return ret;
263 }
265 void jffs2_free_node_frag(struct jffs2_node_frag *x)
266 {
267 dbg_memalloc("%p\n", x);
268 kmem_cache_free(node_frag_slab, x);
269 }
271 struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
272 {
273 struct jffs2_inode_cache *ret;
274 ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
275 dbg_memalloc("%p\n", ret);
276 return ret;
277 }
279 void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
280 {
281 dbg_memalloc("%p\n", x);
282 kmem_cache_free(inode_cache_slab, x);
283 }
285 #ifdef CONFIG_JFFS2_FS_XATTR
286 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
287 {
288 struct jffs2_xattr_datum *xd;
289 xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
290 dbg_memalloc("%p\n", xd);
292 memset(xd, 0, sizeof(struct jffs2_xattr_datum));
293 xd->class = RAWNODE_CLASS_XATTR_DATUM;
294 xd->node = (void *)xd;
295 INIT_LIST_HEAD(&xd->xindex);
296 return xd;
297 }
299 void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
300 {
301 dbg_memalloc("%p\n", xd);
302 kmem_cache_free(xattr_datum_cache, xd);
303 }
305 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
306 {
307 struct jffs2_xattr_ref *ref;
308 ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
309 dbg_memalloc("%p\n", ref);
311 memset(ref, 0, sizeof(struct jffs2_xattr_ref));
312 ref->class = RAWNODE_CLASS_XATTR_REF;
313 ref->node = (void *)ref;
314 return ref;
315 }
317 void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
318 {
319 dbg_memalloc("%p\n", ref);
320 kmem_cache_free(xattr_ref_cache, ref);
321 }
322 #endif