Loading...
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright © 2001-2007 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 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/init.h>
15#include <linux/jffs2.h>
16#include "nodelist.h"
17
18/* These are initialised to NULL in the kernel startup code.
19 If you're porting to other operating systems, beware */
20static struct kmem_cache *full_dnode_slab;
21static struct kmem_cache *raw_dirent_slab;
22static struct kmem_cache *raw_inode_slab;
23static struct kmem_cache *tmp_dnode_info_slab;
24static struct kmem_cache *raw_node_ref_slab;
25static struct kmem_cache *node_frag_slab;
26static struct kmem_cache *inode_cache_slab;
27#ifdef CONFIG_JFFS2_FS_XATTR
28static struct kmem_cache *xattr_datum_cache;
29static struct kmem_cache *xattr_ref_cache;
30#endif
31
32int __init jffs2_create_slab_caches(void)
33{
34 full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
35 sizeof(struct jffs2_full_dnode),
36 0, 0, NULL);
37 if (!full_dnode_slab)
38 goto err;
39
40 raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
41 sizeof(struct jffs2_raw_dirent),
42 0, SLAB_HWCACHE_ALIGN, NULL);
43 if (!raw_dirent_slab)
44 goto err;
45
46 raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
47 sizeof(struct jffs2_raw_inode),
48 0, SLAB_HWCACHE_ALIGN, NULL);
49 if (!raw_inode_slab)
50 goto err;
51
52 tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
53 sizeof(struct jffs2_tmp_dnode_info),
54 0, 0, NULL);
55 if (!tmp_dnode_info_slab)
56 goto err;
57
58 raw_node_ref_slab = kmem_cache_create("jffs2_refblock",
59 sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1),
60 0, 0, NULL);
61 if (!raw_node_ref_slab)
62 goto err;
63
64 node_frag_slab = kmem_cache_create("jffs2_node_frag",
65 sizeof(struct jffs2_node_frag),
66 0, 0, NULL);
67 if (!node_frag_slab)
68 goto err;
69
70 inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
71 sizeof(struct jffs2_inode_cache),
72 0, 0, NULL);
73 if (!inode_cache_slab)
74 goto err;
75
76#ifdef CONFIG_JFFS2_FS_XATTR
77 xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
78 sizeof(struct jffs2_xattr_datum),
79 0, 0, NULL);
80 if (!xattr_datum_cache)
81 goto err;
82
83 xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
84 sizeof(struct jffs2_xattr_ref),
85 0, 0, NULL);
86 if (!xattr_ref_cache)
87 goto err;
88#endif
89
90 return 0;
91 err:
92 jffs2_destroy_slab_caches();
93 return -ENOMEM;
94}
95
96void jffs2_destroy_slab_caches(void)
97{
98 if(full_dnode_slab)
99 kmem_cache_destroy(full_dnode_slab);
100 if(raw_dirent_slab)
101 kmem_cache_destroy(raw_dirent_slab);
102 if(raw_inode_slab)
103 kmem_cache_destroy(raw_inode_slab);
104 if(tmp_dnode_info_slab)
105 kmem_cache_destroy(tmp_dnode_info_slab);
106 if(raw_node_ref_slab)
107 kmem_cache_destroy(raw_node_ref_slab);
108 if(node_frag_slab)
109 kmem_cache_destroy(node_frag_slab);
110 if(inode_cache_slab)
111 kmem_cache_destroy(inode_cache_slab);
112#ifdef CONFIG_JFFS2_FS_XATTR
113 if (xattr_datum_cache)
114 kmem_cache_destroy(xattr_datum_cache);
115 if (xattr_ref_cache)
116 kmem_cache_destroy(xattr_ref_cache);
117#endif
118}
119
120struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
121{
122 struct jffs2_full_dirent *ret;
123 ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
124 dbg_memalloc("%p\n", ret);
125 return ret;
126}
127
128void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
129{
130 dbg_memalloc("%p\n", x);
131 kfree(x);
132}
133
134struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
135{
136 struct jffs2_full_dnode *ret;
137 ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
138 dbg_memalloc("%p\n", ret);
139 return ret;
140}
141
142void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
143{
144 dbg_memalloc("%p\n", x);
145 kmem_cache_free(full_dnode_slab, x);
146}
147
148struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
149{
150 struct jffs2_raw_dirent *ret;
151 ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
152 dbg_memalloc("%p\n", ret);
153 return ret;
154}
155
156void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
157{
158 dbg_memalloc("%p\n", x);
159 kmem_cache_free(raw_dirent_slab, x);
160}
161
162struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
163{
164 struct jffs2_raw_inode *ret;
165 ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
166 dbg_memalloc("%p\n", ret);
167 return ret;
168}
169
170void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
171{
172 dbg_memalloc("%p\n", x);
173 kmem_cache_free(raw_inode_slab, x);
174}
175
176struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
177{
178 struct jffs2_tmp_dnode_info *ret;
179 ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
180 dbg_memalloc("%p\n",
181 ret);
182 return ret;
183}
184
185void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
186{
187 dbg_memalloc("%p\n", x);
188 kmem_cache_free(tmp_dnode_info_slab, x);
189}
190
191static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
192{
193 struct jffs2_raw_node_ref *ret;
194
195 ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
196 if (ret) {
197 int i = 0;
198 for (i=0; i < REFS_PER_BLOCK; i++) {
199 ret[i].flash_offset = REF_EMPTY_NODE;
200 ret[i].next_in_ino = NULL;
201 }
202 ret[i].flash_offset = REF_LINK_NODE;
203 ret[i].next_in_ino = NULL;
204 }
205 return ret;
206}
207
208int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
209 struct jffs2_eraseblock *jeb, int nr)
210{
211 struct jffs2_raw_node_ref **p, *ref;
212 int i = nr;
213
214 dbg_memalloc("%d\n", nr);
215
216 p = &jeb->last_node;
217 ref = *p;
218
219 dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);
220
221 /* If jeb->last_node is really a valid node then skip over it */
222 if (ref && ref->flash_offset != REF_EMPTY_NODE)
223 ref++;
224
225 while (i) {
226 if (!ref) {
227 dbg_memalloc("Allocating new refblock linked from %p\n", p);
228 ref = *p = jffs2_alloc_refblock();
229 if (!ref)
230 return -ENOMEM;
231 }
232 if (ref->flash_offset == REF_LINK_NODE) {
233 p = &ref->next_in_ino;
234 ref = *p;
235 continue;
236 }
237 i--;
238 ref++;
239 }
240 jeb->allocated_refs = nr;
241
242 dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n",
243 nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset,
244 jeb->last_node->next_in_ino);
245
246 return 0;
247}
248
249void jffs2_free_refblock(struct jffs2_raw_node_ref *x)
250{
251 dbg_memalloc("%p\n", x);
252 kmem_cache_free(raw_node_ref_slab, x);
253}
254
255struct jffs2_node_frag *jffs2_alloc_node_frag(void)
256{
257 struct jffs2_node_frag *ret;
258 ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
259 dbg_memalloc("%p\n", ret);
260 return ret;
261}
262
263void jffs2_free_node_frag(struct jffs2_node_frag *x)
264{
265 dbg_memalloc("%p\n", x);
266 kmem_cache_free(node_frag_slab, x);
267}
268
269struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
270{
271 struct jffs2_inode_cache *ret;
272 ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
273 dbg_memalloc("%p\n", ret);
274 return ret;
275}
276
277void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
278{
279 dbg_memalloc("%p\n", x);
280 kmem_cache_free(inode_cache_slab, x);
281}
282
283#ifdef CONFIG_JFFS2_FS_XATTR
284struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
285{
286 struct jffs2_xattr_datum *xd;
287 xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
288 dbg_memalloc("%p\n", xd);
289
290 xd->class = RAWNODE_CLASS_XATTR_DATUM;
291 xd->node = (void *)xd;
292 INIT_LIST_HEAD(&xd->xindex);
293 return xd;
294}
295
296void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
297{
298 dbg_memalloc("%p\n", xd);
299 kmem_cache_free(xattr_datum_cache, xd);
300}
301
302struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
303{
304 struct jffs2_xattr_ref *ref;
305 ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
306 dbg_memalloc("%p\n", ref);
307
308 ref->class = RAWNODE_CLASS_XATTR_REF;
309 ref->node = (void *)ref;
310 return ref;
311}
312
313void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
314{
315 dbg_memalloc("%p\n", ref);
316 kmem_cache_free(xattr_ref_cache, ref);
317}
318#endif
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright © 2001-2007 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 */
11
12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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 */
22static struct kmem_cache *full_dnode_slab;
23static struct kmem_cache *raw_dirent_slab;
24static struct kmem_cache *raw_inode_slab;
25static struct kmem_cache *tmp_dnode_info_slab;
26static struct kmem_cache *raw_node_ref_slab;
27static struct kmem_cache *node_frag_slab;
28static struct kmem_cache *inode_cache_slab;
29#ifdef CONFIG_JFFS2_FS_XATTR
30static struct kmem_cache *xattr_datum_cache;
31static struct kmem_cache *xattr_ref_cache;
32#endif
33
34int __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);
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, SLAB_HWCACHE_ALIGN, 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, SLAB_HWCACHE_ALIGN, 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);
57 if (!tmp_dnode_info_slab)
58 goto err;
59
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);
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);
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);
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);
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);
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
98void 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
122struct 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
130void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
131{
132 dbg_memalloc("%p\n", x);
133 kfree(x);
134}
135
136struct 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
144void 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
150struct 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
158void 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
164struct 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
172void 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
178struct 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
187void 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
193static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
194{
195 struct jffs2_raw_node_ref *ret;
196
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}
209
210int 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;
215
216 dbg_memalloc("%d\n", nr);
217
218 p = &jeb->last_node;
219 ref = *p;
220
221 dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);
222
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++;
226
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;
243
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);
247
248 return 0;
249}
250
251void 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}
256
257struct 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}
264
265void 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}
270
271struct 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}
278
279void 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}
284
285#ifdef CONFIG_JFFS2_FS_XATTR
286struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
287{
288 struct jffs2_xattr_datum *xd;
289 xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
290 dbg_memalloc("%p\n", xd);
291 if (!xd)
292 return NULL;
293
294 xd->class = RAWNODE_CLASS_XATTR_DATUM;
295 xd->node = (void *)xd;
296 INIT_LIST_HEAD(&xd->xindex);
297 return xd;
298}
299
300void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
301{
302 dbg_memalloc("%p\n", xd);
303 kmem_cache_free(xattr_datum_cache, xd);
304}
305
306struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
307{
308 struct jffs2_xattr_ref *ref;
309 ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
310 dbg_memalloc("%p\n", ref);
311 if (!ref)
312 return NULL;
313
314 ref->class = RAWNODE_CLASS_XATTR_REF;
315 ref->node = (void *)ref;
316 return ref;
317}
318
319void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
320{
321 dbg_memalloc("%p\n", ref);
322 kmem_cache_free(xattr_ref_cache, ref);
323}
324#endif