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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" | |
4d0cf552 | 29 | #include "hw/virtio/vhost-user.h" |
042cea27 GA |
30 | #include "standard-headers/linux/virtio_crypto.h" |
31 | #include "sysemu/cryptodev-vhost.h" | |
32 | #include "chardev/char-fe.h" | |
5da73dab | 33 | #include "sysemu/cryptodev-vhost-user.h" |
042cea27 GA |
34 | |
35 | ||
36 | /** | |
37 | * @TYPE_CRYPTODEV_BACKEND_VHOST_USER: | |
38 | * name of backend that uses vhost user server | |
39 | */ | |
40 | #define TYPE_CRYPTODEV_BACKEND_VHOST_USER "cryptodev-vhost-user" | |
41 | ||
42 | #define CRYPTODEV_BACKEND_VHOST_USER(obj) \ | |
43 | OBJECT_CHECK(CryptoDevBackendVhostUser, \ | |
44 | (obj), TYPE_CRYPTODEV_BACKEND_VHOST_USER) | |
45 | ||
46 | ||
47 | typedef struct CryptoDevBackendVhostUser { | |
48 | CryptoDevBackend parent_obj; | |
49 | ||
0b99f224 | 50 | VhostUserState vhost_user; |
042cea27 GA |
51 | CharBackend chr; |
52 | char *chr_name; | |
53 | bool opened; | |
54 | CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM]; | |
55 | } CryptoDevBackendVhostUser; | |
56 | ||
57 | static int | |
58 | cryptodev_vhost_user_running( | |
59 | CryptoDevBackendVhost *crypto) | |
60 | { | |
61 | return crypto ? 1 : 0; | |
62 | } | |
63 | ||
5da73dab GA |
64 | CryptoDevBackendVhost * |
65 | cryptodev_vhost_user_get_vhost( | |
66 | CryptoDevBackendClient *cc, | |
67 | CryptoDevBackend *b, | |
68 | uint16_t queue) | |
69 | { | |
70 | CryptoDevBackendVhostUser *s = | |
71 | CRYPTODEV_BACKEND_VHOST_USER(b); | |
72 | assert(cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER); | |
73 | assert(queue < MAX_CRYPTO_QUEUE_NUM); | |
74 | ||
75 | return s->vhost_crypto[queue]; | |
76 | } | |
77 | ||
042cea27 GA |
78 | static void cryptodev_vhost_user_stop(int queues, |
79 | CryptoDevBackendVhostUser *s) | |
80 | { | |
81 | size_t i; | |
82 | ||
83 | for (i = 0; i < queues; i++) { | |
84 | if (!cryptodev_vhost_user_running(s->vhost_crypto[i])) { | |
85 | continue; | |
86 | } | |
87 | ||
88 | cryptodev_vhost_cleanup(s->vhost_crypto[i]); | |
89 | s->vhost_crypto[i] = NULL; | |
90 | } | |
91 | } | |
92 | ||
93 | static int | |
94 | cryptodev_vhost_user_start(int queues, | |
95 | CryptoDevBackendVhostUser *s) | |
96 | { | |
97 | CryptoDevBackendVhostOptions options; | |
98 | CryptoDevBackend *b = CRYPTODEV_BACKEND(s); | |
99 | int max_queues; | |
100 | size_t i; | |
101 | ||
102 | for (i = 0; i < queues; i++) { | |
103 | if (cryptodev_vhost_user_running(s->vhost_crypto[i])) { | |
104 | continue; | |
105 | } | |
106 | ||
0b99f224 | 107 | options.opaque = &s->vhost_user; |
042cea27 GA |
108 | options.backend_type = VHOST_BACKEND_TYPE_USER; |
109 | options.cc = b->conf.peers.ccs[i]; | |
110 | s->vhost_crypto[i] = cryptodev_vhost_init(&options); | |
111 | if (!s->vhost_crypto[i]) { | |
112 | error_report("failed to init vhost_crypto for queue %zu", i); | |
113 | goto err; | |
114 | } | |
115 | ||
116 | if (i == 0) { | |
117 | max_queues = | |
118 | cryptodev_vhost_get_max_queues(s->vhost_crypto[i]); | |
119 | if (queues > max_queues) { | |
120 | error_report("you are asking more queues than supported: %d", | |
121 | max_queues); | |
122 | goto err; | |
123 | } | |
124 | } | |
125 | } | |
126 | ||
127 | return 0; | |
128 | ||
129 | err: | |
130 | cryptodev_vhost_user_stop(i + 1, s); | |
131 | return -1; | |
132 | } | |
133 | ||
134 | static Chardev * | |
135 | cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s, | |
136 | Error **errp) | |
137 | { | |
138 | Chardev *chr; | |
139 | ||
140 | if (s->chr_name == NULL) { | |
141 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
142 | "chardev", "a valid character device"); | |
143 | return NULL; | |
144 | } | |
145 | ||
146 | chr = qemu_chr_find(s->chr_name); | |
147 | if (chr == NULL) { | |
148 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
149 | "Device '%s' not found", s->chr_name); | |
150 | return NULL; | |
151 | } | |
152 | ||
153 | return chr; | |
154 | } | |
155 | ||
156 | static void cryptodev_vhost_user_event(void *opaque, int event) | |
157 | { | |
158 | CryptoDevBackendVhostUser *s = opaque; | |
159 | CryptoDevBackend *b = CRYPTODEV_BACKEND(s); | |
042cea27 GA |
160 | int queues = b->conf.peers.queues; |
161 | ||
162 | assert(queues < MAX_CRYPTO_QUEUE_NUM); | |
163 | ||
164 | switch (event) { | |
165 | case CHR_EVENT_OPENED: | |
166 | if (cryptodev_vhost_user_start(queues, s) < 0) { | |
167 | exit(1); | |
168 | } | |
169 | b->ready = true; | |
170 | break; | |
171 | case CHR_EVENT_CLOSED: | |
172 | b->ready = false; | |
173 | cryptodev_vhost_user_stop(queues, s); | |
174 | break; | |
175 | } | |
042cea27 GA |
176 | } |
177 | ||
178 | static void cryptodev_vhost_user_init( | |
179 | CryptoDevBackend *backend, Error **errp) | |
180 | { | |
181 | int queues = backend->conf.peers.queues; | |
182 | size_t i; | |
183 | Error *local_err = NULL; | |
184 | Chardev *chr; | |
185 | CryptoDevBackendClient *cc; | |
186 | CryptoDevBackendVhostUser *s = | |
187 | CRYPTODEV_BACKEND_VHOST_USER(backend); | |
188 | ||
189 | chr = cryptodev_vhost_claim_chardev(s, &local_err); | |
190 | if (local_err) { | |
191 | error_propagate(errp, local_err); | |
192 | return; | |
193 | } | |
194 | ||
195 | s->opened = true; | |
196 | ||
197 | for (i = 0; i < queues; i++) { | |
198 | cc = cryptodev_backend_new_client( | |
199 | "cryptodev-vhost-user", NULL); | |
200 | cc->info_str = g_strdup_printf("cryptodev-vhost-user%zu to %s ", | |
201 | i, chr->label); | |
202 | cc->queue_index = i; | |
5da73dab | 203 | cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER; |
042cea27 GA |
204 | |
205 | backend->conf.peers.ccs[i] = cc; | |
206 | ||
207 | if (i == 0) { | |
208 | if (!qemu_chr_fe_init(&s->chr, chr, &local_err)) { | |
209 | error_propagate(errp, local_err); | |
210 | return; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
0b99f224 | 215 | if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) { |
4d0cf552 TB |
216 | return; |
217 | } | |
218 | ||
042cea27 GA |
219 | qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, |
220 | cryptodev_vhost_user_event, NULL, s, NULL, true); | |
221 | ||
222 | backend->conf.crypto_services = | |
223 | 1u << VIRTIO_CRYPTO_SERVICE_CIPHER | | |
224 | 1u << VIRTIO_CRYPTO_SERVICE_HASH | | |
225 | 1u << VIRTIO_CRYPTO_SERVICE_MAC; | |
226 | backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC; | |
227 | backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1; | |
0a9b9be9 GA |
228 | |
229 | backend->conf.max_size = UINT64_MAX; | |
230 | backend->conf.max_cipher_key_len = VHOST_USER_MAX_CIPHER_KEY_LEN; | |
231 | backend->conf.max_auth_key_len = VHOST_USER_MAX_AUTH_KEY_LEN; | |
042cea27 GA |
232 | } |
233 | ||
234 | static int64_t cryptodev_vhost_user_sym_create_session( | |
235 | CryptoDevBackend *backend, | |
236 | CryptoDevBackendSymSessionInfo *sess_info, | |
237 | uint32_t queue_index, Error **errp) | |
238 | { | |
efbfeb81 GA |
239 | CryptoDevBackendClient *cc = |
240 | backend->conf.peers.ccs[queue_index]; | |
241 | CryptoDevBackendVhost *vhost_crypto; | |
242 | uint64_t session_id = 0; | |
243 | int ret; | |
244 | ||
245 | vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index); | |
246 | if (vhost_crypto) { | |
247 | struct vhost_dev *dev = &(vhost_crypto->dev); | |
248 | ret = dev->vhost_ops->vhost_crypto_create_session(dev, | |
249 | sess_info, | |
250 | &session_id); | |
251 | if (ret < 0) { | |
252 | return -1; | |
253 | } else { | |
254 | return session_id; | |
255 | } | |
256 | } | |
257 | return -1; | |
042cea27 GA |
258 | } |
259 | ||
260 | static int cryptodev_vhost_user_sym_close_session( | |
261 | CryptoDevBackend *backend, | |
262 | uint64_t session_id, | |
263 | uint32_t queue_index, Error **errp) | |
264 | { | |
efbfeb81 GA |
265 | CryptoDevBackendClient *cc = |
266 | backend->conf.peers.ccs[queue_index]; | |
267 | CryptoDevBackendVhost *vhost_crypto; | |
268 | int ret; | |
269 | ||
270 | vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index); | |
271 | if (vhost_crypto) { | |
272 | struct vhost_dev *dev = &(vhost_crypto->dev); | |
273 | ret = dev->vhost_ops->vhost_crypto_close_session(dev, | |
274 | session_id); | |
275 | if (ret < 0) { | |
276 | return -1; | |
277 | } else { | |
278 | return 0; | |
279 | } | |
280 | } | |
281 | return -1; | |
042cea27 GA |
282 | } |
283 | ||
284 | static void cryptodev_vhost_user_cleanup( | |
285 | CryptoDevBackend *backend, | |
286 | Error **errp) | |
287 | { | |
288 | CryptoDevBackendVhostUser *s = | |
289 | CRYPTODEV_BACKEND_VHOST_USER(backend); | |
290 | size_t i; | |
291 | int queues = backend->conf.peers.queues; | |
292 | CryptoDevBackendClient *cc; | |
293 | ||
294 | cryptodev_vhost_user_stop(queues, s); | |
295 | ||
296 | for (i = 0; i < queues; i++) { | |
297 | cc = backend->conf.peers.ccs[i]; | |
298 | if (cc) { | |
299 | cryptodev_backend_free_client(cc); | |
300 | backend->conf.peers.ccs[i] = NULL; | |
301 | } | |
302 | } | |
4d0cf552 | 303 | |
0b99f224 | 304 | vhost_user_cleanup(&s->vhost_user); |
042cea27 GA |
305 | } |
306 | ||
307 | static void cryptodev_vhost_user_set_chardev(Object *obj, | |
308 | const char *value, Error **errp) | |
309 | { | |
310 | CryptoDevBackendVhostUser *s = | |
311 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
312 | ||
313 | if (s->opened) { | |
314 | error_setg(errp, QERR_PERMISSION_DENIED); | |
315 | } else { | |
316 | g_free(s->chr_name); | |
317 | s->chr_name = g_strdup(value); | |
318 | } | |
319 | } | |
320 | ||
321 | static char * | |
322 | cryptodev_vhost_user_get_chardev(Object *obj, Error **errp) | |
323 | { | |
324 | CryptoDevBackendVhostUser *s = | |
325 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
326 | Chardev *chr = qemu_chr_fe_get_driver(&s->chr); | |
327 | ||
328 | if (chr && chr->label) { | |
329 | return g_strdup(chr->label); | |
330 | } | |
331 | ||
332 | return NULL; | |
333 | } | |
334 | ||
335 | static void cryptodev_vhost_user_instance_int(Object *obj) | |
336 | { | |
337 | object_property_add_str(obj, "chardev", | |
338 | cryptodev_vhost_user_get_chardev, | |
339 | cryptodev_vhost_user_set_chardev, | |
340 | NULL); | |
341 | } | |
342 | ||
343 | static void cryptodev_vhost_user_finalize(Object *obj) | |
344 | { | |
345 | CryptoDevBackendVhostUser *s = | |
346 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
347 | ||
348 | qemu_chr_fe_deinit(&s->chr, false); | |
349 | ||
350 | g_free(s->chr_name); | |
351 | } | |
352 | ||
353 | static void | |
354 | cryptodev_vhost_user_class_init(ObjectClass *oc, void *data) | |
355 | { | |
356 | CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc); | |
357 | ||
358 | bc->init = cryptodev_vhost_user_init; | |
359 | bc->cleanup = cryptodev_vhost_user_cleanup; | |
360 | bc->create_session = cryptodev_vhost_user_sym_create_session; | |
361 | bc->close_session = cryptodev_vhost_user_sym_close_session; | |
efbfeb81 | 362 | bc->do_sym_op = NULL; |
042cea27 GA |
363 | } |
364 | ||
365 | static const TypeInfo cryptodev_vhost_user_info = { | |
366 | .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER, | |
367 | .parent = TYPE_CRYPTODEV_BACKEND, | |
368 | .class_init = cryptodev_vhost_user_class_init, | |
369 | .instance_init = cryptodev_vhost_user_instance_int, | |
370 | .instance_finalize = cryptodev_vhost_user_finalize, | |
371 | .instance_size = sizeof(CryptoDevBackendVhostUser), | |
372 | }; | |
373 | ||
374 | static void | |
375 | cryptodev_vhost_user_register_types(void) | |
376 | { | |
377 | type_register_static(&cryptodev_vhost_user_info); | |
378 | } | |
379 | ||
380 | type_init(cryptodev_vhost_user_register_types); |