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1da177e4 LT |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
c00c310e | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
1da177e4 LT |
5 | * |
6 | * Created by David Woodhouse <dwmw2@infradead.org> | |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
5a528957 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
20 | /* These are initialised to NULL in the kernel startup code. |
21 | If you're porting to other operating systems, beware */ | |
e18b890b CL |
22 | static struct kmem_cache *full_dnode_slab; |
23 | static struct kmem_cache *raw_dirent_slab; | |
24 | static struct kmem_cache *raw_inode_slab; | |
25 | static struct kmem_cache *tmp_dnode_info_slab; | |
26 | static struct kmem_cache *raw_node_ref_slab; | |
27 | static struct kmem_cache *node_frag_slab; | |
28 | static struct kmem_cache *inode_cache_slab; | |
aa98d7cf | 29 | #ifdef CONFIG_JFFS2_FS_XATTR |
e18b890b CL |
30 | static struct kmem_cache *xattr_datum_cache; |
31 | static struct kmem_cache *xattr_ref_cache; | |
aa98d7cf | 32 | #endif |
1da177e4 LT |
33 | |
34 | int __init jffs2_create_slab_caches(void) | |
35 | { | |
182ec4ee | 36 | full_dnode_slab = kmem_cache_create("jffs2_full_dnode", |
1da177e4 | 37 | sizeof(struct jffs2_full_dnode), |
20c2df83 | 38 | 0, 0, NULL); |
1da177e4 LT |
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), | |
dd799983 | 44 | 0, SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
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), | |
dd799983 | 50 | 0, SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
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), | |
20c2df83 | 56 | 0, 0, NULL); |
1da177e4 LT |
57 | if (!tmp_dnode_info_slab) |
58 | goto err; | |
59 | ||
9bfeb691 DW |
60 | raw_node_ref_slab = kmem_cache_create("jffs2_refblock", |
61 | sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1), | |
20c2df83 | 62 | 0, 0, NULL); |
1da177e4 LT |
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), | |
20c2df83 | 68 | 0, 0, NULL); |
1da177e4 LT |
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), | |
20c2df83 | 74 | 0, 0, NULL); |
aa98d7cf KK |
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), | |
20c2df83 | 81 | 0, 0, NULL); |
aa98d7cf KK |
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), | |
20c2df83 | 87 | 0, 0, NULL); |
aa98d7cf KK |
88 | if (!xattr_ref_cache) |
89 | goto err; | |
90 | #endif | |
91 | ||
92 | return 0; | |
1da177e4 LT |
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); | |
aa98d7cf KK |
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 | |
1da177e4 LT |
120 | } |
121 | ||
122 | struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) | |
123 | { | |
f538c96b AB |
124 | struct jffs2_full_dirent *ret; |
125 | ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); | |
733802d9 | 126 | dbg_memalloc("%p\n", ret); |
f538c96b | 127 | return ret; |
1da177e4 LT |
128 | } |
129 | ||
130 | void jffs2_free_full_dirent(struct jffs2_full_dirent *x) | |
131 | { | |
733802d9 | 132 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
133 | kfree(x); |
134 | } | |
135 | ||
136 | struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) | |
137 | { | |
f538c96b AB |
138 | struct jffs2_full_dnode *ret; |
139 | ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); | |
733802d9 | 140 | dbg_memalloc("%p\n", ret); |
1da177e4 LT |
141 | return ret; |
142 | } | |
143 | ||
144 | void jffs2_free_full_dnode(struct jffs2_full_dnode *x) | |
145 | { | |
733802d9 | 146 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
147 | kmem_cache_free(full_dnode_slab, x); |
148 | } | |
149 | ||
150 | struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) | |
151 | { | |
f538c96b AB |
152 | struct jffs2_raw_dirent *ret; |
153 | ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); | |
733802d9 | 154 | dbg_memalloc("%p\n", ret); |
1da177e4 LT |
155 | return ret; |
156 | } | |
157 | ||
158 | void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) | |
159 | { | |
733802d9 | 160 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
161 | kmem_cache_free(raw_dirent_slab, x); |
162 | } | |
163 | ||
164 | struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) | |
165 | { | |
f538c96b AB |
166 | struct jffs2_raw_inode *ret; |
167 | ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); | |
733802d9 | 168 | dbg_memalloc("%p\n", ret); |
1da177e4 LT |
169 | return ret; |
170 | } | |
171 | ||
172 | void jffs2_free_raw_inode(struct jffs2_raw_inode *x) | |
173 | { | |
733802d9 | 174 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
175 | kmem_cache_free(raw_inode_slab, x); |
176 | } | |
177 | ||
178 | struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) | |
179 | { | |
f538c96b AB |
180 | struct jffs2_tmp_dnode_info *ret; |
181 | ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); | |
733802d9 | 182 | dbg_memalloc("%p\n", |
f538c96b | 183 | ret); |
1da177e4 LT |
184 | return ret; |
185 | } | |
186 | ||
187 | void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) | |
188 | { | |
733802d9 | 189 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
190 | kmem_cache_free(tmp_dnode_info_slab, x); |
191 | } | |
192 | ||
c05d52c7 | 193 | static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void) |
9bfeb691 DW |
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 | ||
046b8b98 DW |
210 | int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, |
211 | struct jffs2_eraseblock *jeb, int nr) | |
2f785402 | 212 | { |
9bfeb691 DW |
213 | struct jffs2_raw_node_ref **p, *ref; |
214 | int i = nr; | |
2f785402 DW |
215 | |
216 | dbg_memalloc("%d\n", nr); | |
217 | ||
9bfeb691 DW |
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++; | |
2f785402 | 241 | } |
9bfeb691 | 242 | jeb->allocated_refs = nr; |
2f785402 | 243 | |
9bfeb691 DW |
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; | |
1da177e4 LT |
249 | } |
250 | ||
9bfeb691 | 251 | void jffs2_free_refblock(struct jffs2_raw_node_ref *x) |
1da177e4 | 252 | { |
733802d9 | 253 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
254 | kmem_cache_free(raw_node_ref_slab, x); |
255 | } | |
256 | ||
257 | struct jffs2_node_frag *jffs2_alloc_node_frag(void) | |
258 | { | |
f538c96b AB |
259 | struct jffs2_node_frag *ret; |
260 | ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); | |
733802d9 | 261 | dbg_memalloc("%p\n", ret); |
1da177e4 LT |
262 | return ret; |
263 | } | |
264 | ||
265 | void jffs2_free_node_frag(struct jffs2_node_frag *x) | |
266 | { | |
733802d9 | 267 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
268 | kmem_cache_free(node_frag_slab, x); |
269 | } | |
270 | ||
271 | struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) | |
272 | { | |
f538c96b AB |
273 | struct jffs2_inode_cache *ret; |
274 | ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); | |
733802d9 | 275 | dbg_memalloc("%p\n", ret); |
1da177e4 LT |
276 | return ret; |
277 | } | |
278 | ||
279 | void jffs2_free_inode_cache(struct jffs2_inode_cache *x) | |
280 | { | |
733802d9 | 281 | dbg_memalloc("%p\n", x); |
1da177e4 LT |
282 | kmem_cache_free(inode_cache_slab, x); |
283 | } | |
aa98d7cf KK |
284 | |
285 | #ifdef CONFIG_JFFS2_FS_XATTR | |
286 | struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void) | |
287 | { | |
288 | struct jffs2_xattr_datum *xd; | |
c6d59cdd | 289 | xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL); |
aa98d7cf | 290 | dbg_memalloc("%p\n", xd); |
2072552c ZZ |
291 | if (!xd) |
292 | return NULL; | |
aa98d7cf | 293 | |
aa98d7cf | 294 | xd->class = RAWNODE_CLASS_XATTR_DATUM; |
c9f700f8 | 295 | xd->node = (void *)xd; |
aa98d7cf KK |
296 | INIT_LIST_HEAD(&xd->xindex); |
297 | return xd; | |
298 | } | |
299 | ||
300 | void 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 | ||
306 | struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void) | |
307 | { | |
308 | struct jffs2_xattr_ref *ref; | |
c6d59cdd | 309 | ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL); |
aa98d7cf | 310 | dbg_memalloc("%p\n", ref); |
2072552c ZZ |
311 | if (!ref) |
312 | return NULL; | |
aa98d7cf | 313 | |
aa98d7cf | 314 | ref->class = RAWNODE_CLASS_XATTR_REF; |
c9f700f8 | 315 | ref->node = (void *)ref; |
aa98d7cf KK |
316 | return ref; |
317 | } | |
318 | ||
319 | void 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 |