Root/
Source at commit 2604e7f9a98c27be50a0c3ff7503b6a5ea8f6cfe created 12 years 7 months ago. By Maarten ter Huurne, cpufreq_stats: Support runtime changes to frequency table | |
---|---|
1 | /* |
2 | * Create default crypto algorithm instances. |
3 | * |
4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the Free |
8 | * Software Foundation; either version 2 of the License, or (at your option) |
9 | * any later version. |
10 | * |
11 | */ |
12 | |
13 | #include <crypto/internal/aead.h> |
14 | #include <linux/completion.h> |
15 | #include <linux/ctype.h> |
16 | #include <linux/err.h> |
17 | #include <linux/init.h> |
18 | #include <linux/kthread.h> |
19 | #include <linux/module.h> |
20 | #include <linux/notifier.h> |
21 | #include <linux/rtnetlink.h> |
22 | #include <linux/sched.h> |
23 | #include <linux/slab.h> |
24 | #include <linux/string.h> |
25 | |
26 | #include "internal.h" |
27 | |
28 | struct cryptomgr_param { |
29 | struct rtattr *tb[CRYPTO_MAX_ATTRS + 2]; |
30 | |
31 | struct { |
32 | struct rtattr attr; |
33 | struct crypto_attr_type data; |
34 | } type; |
35 | |
36 | union { |
37 | struct rtattr attr; |
38 | struct { |
39 | struct rtattr attr; |
40 | struct crypto_attr_alg data; |
41 | } alg; |
42 | struct { |
43 | struct rtattr attr; |
44 | struct crypto_attr_u32 data; |
45 | } nu32; |
46 | } attrs[CRYPTO_MAX_ATTRS]; |
47 | |
48 | char larval[CRYPTO_MAX_ALG_NAME]; |
49 | char template[CRYPTO_MAX_ALG_NAME]; |
50 | |
51 | struct completion *completion; |
52 | |
53 | u32 otype; |
54 | u32 omask; |
55 | }; |
56 | |
57 | struct crypto_test_param { |
58 | char driver[CRYPTO_MAX_ALG_NAME]; |
59 | char alg[CRYPTO_MAX_ALG_NAME]; |
60 | u32 type; |
61 | }; |
62 | |
63 | static int cryptomgr_probe(void *data) |
64 | { |
65 | struct cryptomgr_param *param = data; |
66 | struct crypto_template *tmpl; |
67 | struct crypto_instance *inst; |
68 | int err; |
69 | |
70 | tmpl = crypto_lookup_template(param->template); |
71 | if (!tmpl) |
72 | goto out; |
73 | |
74 | do { |
75 | if (tmpl->create) { |
76 | err = tmpl->create(tmpl, param->tb); |
77 | continue; |
78 | } |
79 | |
80 | inst = tmpl->alloc(param->tb); |
81 | if (IS_ERR(inst)) |
82 | err = PTR_ERR(inst); |
83 | else if ((err = crypto_register_instance(tmpl, inst))) |
84 | tmpl->free(inst); |
85 | } while (err == -EAGAIN && !signal_pending(current)); |
86 | |
87 | crypto_tmpl_put(tmpl); |
88 | |
89 | out: |
90 | complete_all(param->completion); |
91 | kfree(param); |
92 | module_put_and_exit(0); |
93 | } |
94 | |
95 | static int cryptomgr_schedule_probe(struct crypto_larval *larval) |
96 | { |
97 | struct task_struct *thread; |
98 | struct cryptomgr_param *param; |
99 | const char *name = larval->alg.cra_name; |
100 | const char *p; |
101 | unsigned int len; |
102 | int i; |
103 | |
104 | if (!try_module_get(THIS_MODULE)) |
105 | goto err; |
106 | |
107 | param = kzalloc(sizeof(*param), GFP_KERNEL); |
108 | if (!param) |
109 | goto err_put_module; |
110 | |
111 | for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++) |
112 | ; |
113 | |
114 | len = p - name; |
115 | if (!len || *p != '(') |
116 | goto err_free_param; |
117 | |
118 | memcpy(param->template, name, len); |
119 | |
120 | i = 0; |
121 | for (;;) { |
122 | int notnum = 0; |
123 | |
124 | name = ++p; |
125 | len = 0; |
126 | |
127 | for (; isalnum(*p) || *p == '-' || *p == '_'; p++) |
128 | notnum |= !isdigit(*p); |
129 | |
130 | if (*p == '(') { |
131 | int recursion = 0; |
132 | |
133 | for (;;) { |
134 | if (!*++p) |
135 | goto err_free_param; |
136 | if (*p == '(') |
137 | recursion++; |
138 | else if (*p == ')' && !recursion--) |
139 | break; |
140 | } |
141 | |
142 | notnum = 1; |
143 | p++; |
144 | } |
145 | |
146 | len = p - name; |
147 | if (!len) |
148 | goto err_free_param; |
149 | |
150 | if (notnum) { |
151 | param->attrs[i].alg.attr.rta_len = |
152 | sizeof(param->attrs[i].alg); |
153 | param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG; |
154 | memcpy(param->attrs[i].alg.data.name, name, len); |
155 | } else { |
156 | param->attrs[i].nu32.attr.rta_len = |
157 | sizeof(param->attrs[i].nu32); |
158 | param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32; |
159 | param->attrs[i].nu32.data.num = |
160 | simple_strtol(name, NULL, 0); |
161 | } |
162 | |
163 | param->tb[i + 1] = ¶m->attrs[i].attr; |
164 | i++; |
165 | |
166 | if (i >= CRYPTO_MAX_ATTRS) |
167 | goto err_free_param; |
168 | |
169 | if (*p == ')') |
170 | break; |
171 | |
172 | if (*p != ',') |
173 | goto err_free_param; |
174 | } |
175 | |
176 | if (!i) |
177 | goto err_free_param; |
178 | |
179 | param->tb[i + 1] = NULL; |
180 | |
181 | param->type.attr.rta_len = sizeof(param->type); |
182 | param->type.attr.rta_type = CRYPTOA_TYPE; |
183 | param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED; |
184 | param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED; |
185 | param->tb[0] = ¶m->type.attr; |
186 | |
187 | param->otype = larval->alg.cra_flags; |
188 | param->omask = larval->mask; |
189 | |
190 | memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME); |
191 | |
192 | param->completion = &larval->completion; |
193 | |
194 | thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe"); |
195 | if (IS_ERR(thread)) |
196 | goto err_free_param; |
197 | |
198 | wait_for_completion_interruptible(&larval->completion); |
199 | |
200 | return NOTIFY_STOP; |
201 | |
202 | err_free_param: |
203 | kfree(param); |
204 | err_put_module: |
205 | module_put(THIS_MODULE); |
206 | err: |
207 | return NOTIFY_OK; |
208 | } |
209 | |
210 | static int cryptomgr_test(void *data) |
211 | { |
212 | struct crypto_test_param *param = data; |
213 | u32 type = param->type; |
214 | int err = 0; |
215 | |
216 | #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS |
217 | goto skiptest; |
218 | #endif |
219 | |
220 | if (type & CRYPTO_ALG_TESTED) |
221 | goto skiptest; |
222 | |
223 | err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED); |
224 | |
225 | skiptest: |
226 | crypto_alg_tested(param->driver, err); |
227 | |
228 | kfree(param); |
229 | module_put_and_exit(0); |
230 | } |
231 | |
232 | static int cryptomgr_schedule_test(struct crypto_alg *alg) |
233 | { |
234 | struct task_struct *thread; |
235 | struct crypto_test_param *param; |
236 | u32 type; |
237 | |
238 | if (!try_module_get(THIS_MODULE)) |
239 | goto err; |
240 | |
241 | param = kzalloc(sizeof(*param), GFP_KERNEL); |
242 | if (!param) |
243 | goto err_put_module; |
244 | |
245 | memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver)); |
246 | memcpy(param->alg, alg->cra_name, sizeof(param->alg)); |
247 | type = alg->cra_flags; |
248 | |
249 | /* This piece of crap needs to disappear into per-type test hooks. */ |
250 | if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) & |
251 | CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) && |
252 | ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == |
253 | CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : |
254 | alg->cra_ablkcipher.ivsize)) || |
255 | (!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) && |
256 | alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize)) |
257 | type |= CRYPTO_ALG_TESTED; |
258 | |
259 | param->type = type; |
260 | |
261 | thread = kthread_run(cryptomgr_test, param, "cryptomgr_test"); |
262 | if (IS_ERR(thread)) |
263 | goto err_free_param; |
264 | |
265 | return NOTIFY_STOP; |
266 | |
267 | err_free_param: |
268 | kfree(param); |
269 | err_put_module: |
270 | module_put(THIS_MODULE); |
271 | err: |
272 | return NOTIFY_OK; |
273 | } |
274 | |
275 | static int cryptomgr_notify(struct notifier_block *this, unsigned long msg, |
276 | void *data) |
277 | { |
278 | switch (msg) { |
279 | case CRYPTO_MSG_ALG_REQUEST: |
280 | return cryptomgr_schedule_probe(data); |
281 | case CRYPTO_MSG_ALG_REGISTER: |
282 | return cryptomgr_schedule_test(data); |
283 | } |
284 | |
285 | return NOTIFY_DONE; |
286 | } |
287 | |
288 | static struct notifier_block cryptomgr_notifier = { |
289 | .notifier_call = cryptomgr_notify, |
290 | }; |
291 | |
292 | static int __init cryptomgr_init(void) |
293 | { |
294 | return crypto_register_notifier(&cryptomgr_notifier); |
295 | } |
296 | |
297 | static void __exit cryptomgr_exit(void) |
298 | { |
299 | int err = crypto_unregister_notifier(&cryptomgr_notifier); |
300 | BUG_ON(err); |
301 | } |
302 | |
303 | subsys_initcall(cryptomgr_init); |
304 | module_exit(cryptomgr_exit); |
305 | |
306 | MODULE_LICENSE("GPL"); |
307 | MODULE_DESCRIPTION("Crypto Algorithm Manager"); |
308 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9