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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 | |
0dda001b | 12 | * version 2.1 of the License, or (at your option) any later version. |
042cea27 GA |
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" | |
042cea27 GA |
25 | #include "qapi/error.h" |
26 | #include "qapi/qmp/qerror.h" | |
27 | #include "qemu/error-report.h" | |
4d0cf552 | 28 | #include "hw/virtio/vhost-user.h" |
042cea27 GA |
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" |
db1015e9 | 33 | #include "qom/object.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 | ||
8063396b | 42 | OBJECT_DECLARE_SIMPLE_TYPE(CryptoDevBackendVhostUser, CRYPTODEV_BACKEND_VHOST_USER) |
042cea27 GA |
43 | |
44 | ||
db1015e9 | 45 | struct CryptoDevBackendVhostUser { |
042cea27 GA |
46 | CryptoDevBackend parent_obj; |
47 | ||
0b99f224 | 48 | VhostUserState vhost_user; |
042cea27 GA |
49 | CharBackend chr; |
50 | char *chr_name; | |
51 | bool opened; | |
52 | CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM]; | |
db1015e9 | 53 | }; |
042cea27 GA |
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 | ||
0b99f224 | 105 | options.opaque = &s->vhost_user; |
042cea27 GA |
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 | ||
083b266f | 154 | static void cryptodev_vhost_user_event(void *opaque, QEMUChrEvent event) |
042cea27 GA |
155 | { |
156 | CryptoDevBackendVhostUser *s = opaque; | |
157 | CryptoDevBackend *b = CRYPTODEV_BACKEND(s); | |
042cea27 GA |
158 | int queues = b->conf.peers.queues; |
159 | ||
160 | assert(queues < MAX_CRYPTO_QUEUE_NUM); | |
161 | ||
162 | switch (event) { | |
163 | case CHR_EVENT_OPENED: | |
164 | if (cryptodev_vhost_user_start(queues, s) < 0) { | |
165 | exit(1); | |
166 | } | |
167 | b->ready = true; | |
168 | break; | |
169 | case CHR_EVENT_CLOSED: | |
170 | b->ready = false; | |
171 | cryptodev_vhost_user_stop(queues, s); | |
172 | break; | |
5b082922 PMD |
173 | case CHR_EVENT_BREAK: |
174 | case CHR_EVENT_MUX_IN: | |
175 | case CHR_EVENT_MUX_OUT: | |
176 | /* Ignore */ | |
177 | break; | |
042cea27 | 178 | } |
042cea27 GA |
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) { | |
668f62ec | 211 | if (!qemu_chr_fe_init(&s->chr, chr, errp)) { |
042cea27 GA |
212 | return; |
213 | } | |
214 | } | |
215 | } | |
216 | ||
0b99f224 | 217 | if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) { |
4d0cf552 TB |
218 | return; |
219 | } | |
220 | ||
042cea27 GA |
221 | qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, |
222 | cryptodev_vhost_user_event, NULL, s, NULL, true); | |
223 | ||
224 | backend->conf.crypto_services = | |
225 | 1u << VIRTIO_CRYPTO_SERVICE_CIPHER | | |
226 | 1u << VIRTIO_CRYPTO_SERVICE_HASH | | |
227 | 1u << VIRTIO_CRYPTO_SERVICE_MAC; | |
228 | backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC; | |
229 | backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1; | |
0a9b9be9 GA |
230 | |
231 | backend->conf.max_size = UINT64_MAX; | |
232 | backend->conf.max_cipher_key_len = VHOST_USER_MAX_CIPHER_KEY_LEN; | |
233 | backend->conf.max_auth_key_len = VHOST_USER_MAX_AUTH_KEY_LEN; | |
042cea27 GA |
234 | } |
235 | ||
236 | static int64_t cryptodev_vhost_user_sym_create_session( | |
237 | CryptoDevBackend *backend, | |
238 | CryptoDevBackendSymSessionInfo *sess_info, | |
239 | uint32_t queue_index, Error **errp) | |
240 | { | |
efbfeb81 GA |
241 | CryptoDevBackendClient *cc = |
242 | backend->conf.peers.ccs[queue_index]; | |
243 | CryptoDevBackendVhost *vhost_crypto; | |
244 | uint64_t session_id = 0; | |
245 | int ret; | |
246 | ||
247 | vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index); | |
248 | if (vhost_crypto) { | |
249 | struct vhost_dev *dev = &(vhost_crypto->dev); | |
250 | ret = dev->vhost_ops->vhost_crypto_create_session(dev, | |
251 | sess_info, | |
252 | &session_id); | |
253 | if (ret < 0) { | |
254 | return -1; | |
255 | } else { | |
256 | return session_id; | |
257 | } | |
258 | } | |
259 | return -1; | |
042cea27 GA |
260 | } |
261 | ||
2fda101d | 262 | static int cryptodev_vhost_user_create_session( |
0e660a6f ZP |
263 | CryptoDevBackend *backend, |
264 | CryptoDevBackendSessionInfo *sess_info, | |
2fda101d LH |
265 | uint32_t queue_index, |
266 | CryptoDevCompletionFunc cb, | |
267 | void *opaque) | |
0e660a6f ZP |
268 | { |
269 | uint32_t op_code = sess_info->op_code; | |
270 | CryptoDevBackendSymSessionInfo *sym_sess_info; | |
2fda101d LH |
271 | int64_t ret; |
272 | Error *local_error = NULL; | |
273 | int status; | |
0e660a6f ZP |
274 | |
275 | switch (op_code) { | |
276 | case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION: | |
277 | case VIRTIO_CRYPTO_HASH_CREATE_SESSION: | |
278 | case VIRTIO_CRYPTO_MAC_CREATE_SESSION: | |
279 | case VIRTIO_CRYPTO_AEAD_CREATE_SESSION: | |
280 | sym_sess_info = &sess_info->u.sym_sess_info; | |
2fda101d LH |
281 | ret = cryptodev_vhost_user_sym_create_session(backend, sym_sess_info, |
282 | queue_index, &local_error); | |
283 | break; | |
284 | ||
0e660a6f | 285 | default: |
2fda101d | 286 | error_setg(&local_error, "Unsupported opcode :%" PRIu32 "", |
0e660a6f | 287 | sess_info->op_code); |
2fda101d | 288 | return -VIRTIO_CRYPTO_NOTSUPP; |
0e660a6f ZP |
289 | } |
290 | ||
2fda101d LH |
291 | if (local_error) { |
292 | error_report_err(local_error); | |
293 | } | |
294 | if (ret < 0) { | |
295 | status = -VIRTIO_CRYPTO_ERR; | |
296 | } else { | |
297 | sess_info->session_id = ret; | |
298 | status = VIRTIO_CRYPTO_OK; | |
299 | } | |
300 | if (cb) { | |
301 | cb(opaque, status); | |
302 | } | |
303 | return 0; | |
0e660a6f ZP |
304 | } |
305 | ||
306 | static int cryptodev_vhost_user_close_session( | |
042cea27 GA |
307 | CryptoDevBackend *backend, |
308 | uint64_t session_id, | |
2fda101d LH |
309 | uint32_t queue_index, |
310 | CryptoDevCompletionFunc cb, | |
311 | void *opaque) | |
042cea27 | 312 | { |
efbfeb81 GA |
313 | CryptoDevBackendClient *cc = |
314 | backend->conf.peers.ccs[queue_index]; | |
315 | CryptoDevBackendVhost *vhost_crypto; | |
2fda101d | 316 | int ret = -1, status; |
efbfeb81 GA |
317 | |
318 | vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index); | |
319 | if (vhost_crypto) { | |
320 | struct vhost_dev *dev = &(vhost_crypto->dev); | |
321 | ret = dev->vhost_ops->vhost_crypto_close_session(dev, | |
322 | session_id); | |
323 | if (ret < 0) { | |
2fda101d | 324 | status = -VIRTIO_CRYPTO_ERR; |
efbfeb81 | 325 | } else { |
2fda101d | 326 | status = VIRTIO_CRYPTO_OK; |
efbfeb81 | 327 | } |
2fda101d LH |
328 | } else { |
329 | status = -VIRTIO_CRYPTO_NOTSUPP; | |
efbfeb81 | 330 | } |
2fda101d LH |
331 | if (cb) { |
332 | cb(opaque, status); | |
333 | } | |
334 | return 0; | |
042cea27 GA |
335 | } |
336 | ||
337 | static void cryptodev_vhost_user_cleanup( | |
338 | CryptoDevBackend *backend, | |
339 | Error **errp) | |
340 | { | |
341 | CryptoDevBackendVhostUser *s = | |
342 | CRYPTODEV_BACKEND_VHOST_USER(backend); | |
343 | size_t i; | |
344 | int queues = backend->conf.peers.queues; | |
345 | CryptoDevBackendClient *cc; | |
346 | ||
347 | cryptodev_vhost_user_stop(queues, s); | |
348 | ||
349 | for (i = 0; i < queues; i++) { | |
350 | cc = backend->conf.peers.ccs[i]; | |
351 | if (cc) { | |
352 | cryptodev_backend_free_client(cc); | |
353 | backend->conf.peers.ccs[i] = NULL; | |
354 | } | |
355 | } | |
4d0cf552 | 356 | |
0b99f224 | 357 | vhost_user_cleanup(&s->vhost_user); |
042cea27 GA |
358 | } |
359 | ||
360 | static void cryptodev_vhost_user_set_chardev(Object *obj, | |
361 | const char *value, Error **errp) | |
362 | { | |
363 | CryptoDevBackendVhostUser *s = | |
364 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
365 | ||
366 | if (s->opened) { | |
ff924448 | 367 | error_setg(errp, "Property 'chardev' can no longer be set"); |
042cea27 GA |
368 | } else { |
369 | g_free(s->chr_name); | |
370 | s->chr_name = g_strdup(value); | |
371 | } | |
372 | } | |
373 | ||
374 | static char * | |
375 | cryptodev_vhost_user_get_chardev(Object *obj, Error **errp) | |
376 | { | |
377 | CryptoDevBackendVhostUser *s = | |
378 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
379 | Chardev *chr = qemu_chr_fe_get_driver(&s->chr); | |
380 | ||
381 | if (chr && chr->label) { | |
382 | return g_strdup(chr->label); | |
383 | } | |
384 | ||
385 | return NULL; | |
386 | } | |
387 | ||
042cea27 GA |
388 | static void cryptodev_vhost_user_finalize(Object *obj) |
389 | { | |
390 | CryptoDevBackendVhostUser *s = | |
391 | CRYPTODEV_BACKEND_VHOST_USER(obj); | |
392 | ||
393 | qemu_chr_fe_deinit(&s->chr, false); | |
394 | ||
395 | g_free(s->chr_name); | |
396 | } | |
397 | ||
398 | static void | |
399 | cryptodev_vhost_user_class_init(ObjectClass *oc, void *data) | |
400 | { | |
401 | CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc); | |
402 | ||
403 | bc->init = cryptodev_vhost_user_init; | |
404 | bc->cleanup = cryptodev_vhost_user_cleanup; | |
0e660a6f ZP |
405 | bc->create_session = cryptodev_vhost_user_create_session; |
406 | bc->close_session = cryptodev_vhost_user_close_session; | |
407 | bc->do_op = NULL; | |
07b0db0e EH |
408 | |
409 | object_class_property_add_str(oc, "chardev", | |
410 | cryptodev_vhost_user_get_chardev, | |
411 | cryptodev_vhost_user_set_chardev); | |
412 | ||
042cea27 GA |
413 | } |
414 | ||
415 | static const TypeInfo cryptodev_vhost_user_info = { | |
416 | .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER, | |
417 | .parent = TYPE_CRYPTODEV_BACKEND, | |
418 | .class_init = cryptodev_vhost_user_class_init, | |
042cea27 GA |
419 | .instance_finalize = cryptodev_vhost_user_finalize, |
420 | .instance_size = sizeof(CryptoDevBackendVhostUser), | |
421 | }; | |
422 | ||
423 | static void | |
424 | cryptodev_vhost_user_register_types(void) | |
425 | { | |
426 | type_register_static(&cryptodev_vhost_user_info); | |
427 | } | |
428 | ||
429 | type_init(cryptodev_vhost_user_register_types); |