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042cea27 GA |
1 | /* |
2 | * QEMU Cryptodev backend for QEMU cipher APIs | |
3 | * | |
4 | * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. | |
5 | * | |
6 | * Authors: | |
7 | * Gonglei <arei.gonglei@huawei.com> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include "qemu/osdep.h" | |
25 | #include "hw/boards.h" | |
26 | #include "qapi/error.h" | |
27 | #include "qapi/qmp/qerror.h" | |
28 | #include "qemu/error-report.h" | |
29 | #include "standard-headers/linux/virtio_crypto.h" | |
30 | #include "sysemu/cryptodev-vhost.h" | |
31 | #include "chardev/char-fe.h" | |
5da73dab | 32 | #include "sysemu/cryptodev-vhost-user.h" |
042cea27 GA |
33 | |
34 | ||
35 | /** | |
36 | * @TYPE_CRYPTODEV_BACKEND_VHOST_USER: | |
37 | * name of backend that uses vhost user server | |
38 | */ | |
39 | #define TYPE_CRYPTODEV_BACKEND_VHOST_USER "cryptodev-vhost-user" | |
40 | ||
41 | #define CRYPTODEV_BACKEND_VHOST_USER(obj) \ | |
42 | OBJECT_CHECK(CryptoDevBackendVhostUser, \ | |
43 | (obj), TYPE_CRYPTODEV_BACKEND_VHOST_USER) | |
44 | ||
45 | ||
46 | typedef struct CryptoDevBackendVhostUser { | |
47 | CryptoDevBackend parent_obj; | |
48 | ||
49 | CharBackend chr; | |
50 | char *chr_name; | |
51 | bool opened; | |
52 | CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM]; | |
53 | } CryptoDevBackendVhostUser; | |
54 | ||
55 | static int | |
56 | cryptodev_vhost_user_running( | |
57 | CryptoDevBackendVhost *crypto) | |
58 | { | |
59 | return crypto ? 1 : 0; | |
60 | } | |
61 | ||
5da73dab GA |
62 | CryptoDevBackendVhost * |
63 | cryptodev_vhost_user_get_vhost( | |
64 | CryptoDevBackendClient *cc, | |
65 | CryptoDevBackend *b, | |
66 | uint16_t queue) | |
67 | { | |
68 | CryptoDevBackendVhostUser *s = | |
69 | CRYPTODEV_BACKEND_VHOST_USER(b); | |
70 | assert(cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER); | |
71 | assert(queue < MAX_CRYPTO_QUEUE_NUM); | |
72 | ||
73 | return s->vhost_crypto[queue]; | |
74 | } | |
75 | ||
042cea27 GA |
76 | static void cryptodev_vhost_user_stop(int queues, |
77 | CryptoDevBackendVhostUser *s) | |
78 | { | |
79 | size_t i; | |
80 | ||
81 | for (i = 0; i < queues; i++) { | |
82 | if (!cryptodev_vhost_user_running(s->vhost_crypto[i])) { | |
83 | continue; | |
84 | } | |
85 | ||
86 | cryptodev_vhost_cleanup(s->vhost_crypto[i]); | |
87 | s->vhost_crypto[i] = NULL; | |
88 | } | |
89 | } | |
90 | ||
91 | static int | |
92 | cryptodev_vhost_user_start(int queues, | |
93 | CryptoDevBackendVhostUser *s) | |
94 | { | |
95 | CryptoDevBackendVhostOptions options; | |
96 | CryptoDevBackend *b = CRYPTODEV_BACKEND(s); | |
97 | int max_queues; | |
98 | size_t i; | |
99 | ||
100 | for (i = 0; i < queues; i++) { | |
101 | if (cryptodev_vhost_user_running(s->vhost_crypto[i])) { | |
102 | continue; | |
103 | } | |
104 | ||
105 | options.opaque = &s->chr; | |
106 | options.backend_type = VHOST_BACKEND_TYPE_USER; | |
107 | options.cc = b->conf.peers.ccs[i]; | |
108 | s->vhost_crypto[i] = cryptodev_vhost_init(&options); | |
109 | if (!s->vhost_crypto[i]) { | |
110 | error_report("failed to init vhost_crypto for queue %zu", i); | |
111 | goto err; | |
112 | } | |
113 | ||
114 | if (i == 0) { | |
115 | max_queues = | |
116 | cryptodev_vhost_get_max_queues(s->vhost_crypto[i]); | |
117 | if (queues > max_queues) { | |
118 | error_report("you are asking more queues than supported: %d", | |
119 | max_queues); | |
120 | goto err; | |
121 | } | |
122 | } | |
123 | } | |
124 | ||
125 | return 0; | |
126 | ||
127 | err: | |
128 | cryptodev_vhost_user_stop(i + 1, s); | |
129 | return -1; | |
130 | } | |
131 | ||
132 | static Chardev * | |
133 | cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s, | |
134 | Error **errp) | |
135 | { | |
136 | Chardev *chr; | |
137 | ||
138 | if (s->chr_name == NULL) { | |
139 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
140 | "chardev", "a valid character device"); | |
141 | return NULL; | |
142 | } | |
143 | ||
144 | chr = qemu_chr_find(s->chr_name); | |
145 | if (chr == NULL) { | |
146 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
147 | "Device '%s' not found", s->chr_name); | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | return chr; | |
152 | } | |
153 | ||
154 | static void cryptodev_vhost_user_event(void *opaque, int event) | |
155 | { | |
156 | CryptoDevBackendVhostUser *s = opaque; | |
157 | CryptoDevBackend *b = CRYPTODEV_BACKEND(s); | |
158 | Error *err = NULL; | |
159 | int queues = b->conf.peers.queues; | |
160 | ||
161 | assert(queues < MAX_CRYPTO_QUEUE_NUM); | |
162 | ||
163 | switch (event) { | |
164 | case CHR_EVENT_OPENED: | |
165 | if (cryptodev_vhost_user_start(queues, s) < 0) { | |
166 | exit(1); | |
167 | } | |
168 | b->ready = true; | |
169 | break; | |
170 | case CHR_EVENT_CLOSED: | |
171 | b->ready = false; | |
172 | cryptodev_vhost_user_stop(queues, s); | |
173 | break; | |
174 | } | |
175 | ||
176 | if (err) { | |
177 | error_report_err(err); | |
178 | } | |
179 | } | |
180 | ||
181 | static void cryptodev_vhost_user_init( | |
182 | CryptoDevBackend *backend, Error **errp) | |
183 | { | |
184 | int queues = backend->conf.peers.queues; | |
185 | size_t i; | |
186 | Error *local_err = NULL; | |
187 | Chardev *chr; | |
188 | CryptoDevBackendClient *cc; | |
189 | CryptoDevBackendVhostUser *s = | |
190 | CRYPTODEV_BACKEND_VHOST_USER(backend); | |
191 | ||
192 | chr = cryptodev_vhost_claim_chardev(s, &local_err); | |
193 | if (local_err) { | |
194 | error_propagate(errp, local_err); | |
195 | return; | |
196 | } | |
197 | ||
198 | s->opened = true; | |
199 | ||
200 | for (i = 0; i < queues; i++) { | |
201 | cc = cryptodev_backend_new_client( | |
202 | "cryptodev-vhost-user", NULL); | |
203 | cc->info_str = g_strdup_printf("cryptodev-vhost-user%zu to %s ", | |
204 | i, chr->label); | |
205 | cc->queue_index = i; | |
5da73dab | 206 | cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER; |
042cea27 GA |
207 | |
208 | backend->conf.peers.ccs[i] = cc; | |
209 | ||
210 | if (i == 0) { | |
211 | if (!qemu_chr_fe_init(&s->chr, chr, &local_err)) { | |
212 | error_propagate(errp, local_err); | |
213 | return; | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, | |
219 | cryptodev_vhost_user_event, NULL, s, NULL, true); | |
220 | ||
221 | backend->conf.crypto_services = | |
222 | 1u << VIRTIO_CRYPTO_SERVICE_CIPHER | | |
223 | 1u << VIRTIO_CRYPTO_SERVICE_HASH | | |
224 | 1u << VIRTIO_CRYPTO_SERVICE_MAC; | |
225 | backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC; | |
226 | backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1; | |
227 | } | |
228 | ||
229 | static int64_t cryptodev_vhost_user_sym_create_session( | |
230 | CryptoDevBackend *backend, | |
231 | CryptoDevBackendSymSessionInfo *sess_info, | |
232 | uint32_t queue_index, Error **errp) | |
233 | { | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static int cryptodev_vhost_user_sym_close_session( | |
238 | CryptoDevBackend *backend, | |
239 | uint64_t session_id, | |
240 | uint32_t queue_index, Error **errp) | |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
245 | static int cryptodev_vhost_user_sym_operation( | |
246 | CryptoDevBackend *backend, | |
247 | CryptoDevBackendSymOpInfo *op_info, | |
248 | uint32_t queue_index, Error **errp) | |
249 | { | |
250 | return VIRTIO_CRYPTO_OK; | |
251 | } | |
252 | ||
253 | static void cryptodev_vhost_user_cleanup( | |
254 | CryptoDevBackend *backend, | |
255 | Error **errp) | |
256 | { | |
257 | CryptoDevBackendVhostUser *s = | |
258 | CRYPTODEV_BACKEND_VHOST_USER(backend); | |
259 | size_t i; | |
260 | int queues = backend->conf.peers.queues; | |
261 | CryptoDevBackendClient *cc; | |
262 | ||
263 | cryptodev_vhost_user_stop(queues, s); | |
264 | ||
265 | for (i = 0; i < queues; i++) { | |
266 | cc = backend->conf.peers.ccs[i]; | |
267 | if (cc) { | |
268 | cryptodev_backend_free_client(cc); | |
269 | backend->conf.peers.ccs[i] = NULL; | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
274 | static void cryptodev_vhost_user_set_chardev(Object *obj, | |
275 | const char *value, Error **errp) | |
276 | { | |
277 | CryptoDevBackendVhostUser *s = | |
278 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
279 | ||
280 | if (s->opened) { | |
281 | error_setg(errp, QERR_PERMISSION_DENIED); | |
282 | } else { | |
283 | g_free(s->chr_name); | |
284 | s->chr_name = g_strdup(value); | |
285 | } | |
286 | } | |
287 | ||
288 | static char * | |
289 | cryptodev_vhost_user_get_chardev(Object *obj, Error **errp) | |
290 | { | |
291 | CryptoDevBackendVhostUser *s = | |
292 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
293 | Chardev *chr = qemu_chr_fe_get_driver(&s->chr); | |
294 | ||
295 | if (chr && chr->label) { | |
296 | return g_strdup(chr->label); | |
297 | } | |
298 | ||
299 | return NULL; | |
300 | } | |
301 | ||
302 | static void cryptodev_vhost_user_instance_int(Object *obj) | |
303 | { | |
304 | object_property_add_str(obj, "chardev", | |
305 | cryptodev_vhost_user_get_chardev, | |
306 | cryptodev_vhost_user_set_chardev, | |
307 | NULL); | |
308 | } | |
309 | ||
310 | static void cryptodev_vhost_user_finalize(Object *obj) | |
311 | { | |
312 | CryptoDevBackendVhostUser *s = | |
313 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
314 | ||
315 | qemu_chr_fe_deinit(&s->chr, false); | |
316 | ||
317 | g_free(s->chr_name); | |
318 | } | |
319 | ||
320 | static void | |
321 | cryptodev_vhost_user_class_init(ObjectClass *oc, void *data) | |
322 | { | |
323 | CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc); | |
324 | ||
325 | bc->init = cryptodev_vhost_user_init; | |
326 | bc->cleanup = cryptodev_vhost_user_cleanup; | |
327 | bc->create_session = cryptodev_vhost_user_sym_create_session; | |
328 | bc->close_session = cryptodev_vhost_user_sym_close_session; | |
329 | bc->do_sym_op = cryptodev_vhost_user_sym_operation; | |
330 | } | |
331 | ||
332 | static const TypeInfo cryptodev_vhost_user_info = { | |
333 | .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER, | |
334 | .parent = TYPE_CRYPTODEV_BACKEND, | |
335 | .class_init = cryptodev_vhost_user_class_init, | |
336 | .instance_init = cryptodev_vhost_user_instance_int, | |
337 | .instance_finalize = cryptodev_vhost_user_finalize, | |
338 | .instance_size = sizeof(CryptoDevBackendVhostUser), | |
339 | }; | |
340 | ||
341 | static void | |
342 | cryptodev_vhost_user_register_types(void) | |
343 | { | |
344 | type_register_static(&cryptodev_vhost_user_info); | |
345 | } | |
346 | ||
347 | type_init(cryptodev_vhost_user_register_types); |