travis.yml: Drop the default softmmu builds
[qemu.git] / backends / cryptodev-vhost-user.c
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 "qapi/error.h"
26 #include "qapi/qmp/qerror.h"
27 #include "qemu/error-report.h"
28 #include "hw/virtio/vhost-user.h"
29 #include "standard-headers/linux/virtio_crypto.h"
30 #include "sysemu/cryptodev-vhost.h"
31 #include "chardev/char-fe.h"
32 #include "sysemu/cryptodev-vhost-user.h"
33 #include "qom/object.h"
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 OBJECT_DECLARE_SIMPLE_TYPE(CryptoDevBackendVhostUser, CRYPTODEV_BACKEND_VHOST_USER)
43
44
45 struct CryptoDevBackendVhostUser {
46 CryptoDevBackend parent_obj;
47
48 VhostUserState vhost_user;
49 CharBackend chr;
50 char *chr_name;
51 bool opened;
52 CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM];
53 };
54
55 static int
56 cryptodev_vhost_user_running(
57 CryptoDevBackendVhost *crypto)
58 {
59 return crypto ? 1 : 0;
60 }
61
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
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->vhost_user;
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, QEMUChrEvent event)
155 {
156 CryptoDevBackendVhostUser *s = opaque;
157 CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
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;
173 case CHR_EVENT_BREAK:
174 case CHR_EVENT_MUX_IN:
175 case CHR_EVENT_MUX_OUT:
176 /* Ignore */
177 break;
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;
206 cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER;
207
208 backend->conf.peers.ccs[i] = cc;
209
210 if (i == 0) {
211 if (!qemu_chr_fe_init(&s->chr, chr, errp)) {
212 return;
213 }
214 }
215 }
216
217 if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) {
218 return;
219 }
220
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;
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;
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 {
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;
260 }
261
262 static int cryptodev_vhost_user_sym_close_session(
263 CryptoDevBackend *backend,
264 uint64_t session_id,
265 uint32_t queue_index, Error **errp)
266 {
267 CryptoDevBackendClient *cc =
268 backend->conf.peers.ccs[queue_index];
269 CryptoDevBackendVhost *vhost_crypto;
270 int ret;
271
272 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
273 if (vhost_crypto) {
274 struct vhost_dev *dev = &(vhost_crypto->dev);
275 ret = dev->vhost_ops->vhost_crypto_close_session(dev,
276 session_id);
277 if (ret < 0) {
278 return -1;
279 } else {
280 return 0;
281 }
282 }
283 return -1;
284 }
285
286 static void cryptodev_vhost_user_cleanup(
287 CryptoDevBackend *backend,
288 Error **errp)
289 {
290 CryptoDevBackendVhostUser *s =
291 CRYPTODEV_BACKEND_VHOST_USER(backend);
292 size_t i;
293 int queues = backend->conf.peers.queues;
294 CryptoDevBackendClient *cc;
295
296 cryptodev_vhost_user_stop(queues, s);
297
298 for (i = 0; i < queues; i++) {
299 cc = backend->conf.peers.ccs[i];
300 if (cc) {
301 cryptodev_backend_free_client(cc);
302 backend->conf.peers.ccs[i] = NULL;
303 }
304 }
305
306 vhost_user_cleanup(&s->vhost_user);
307 }
308
309 static void cryptodev_vhost_user_set_chardev(Object *obj,
310 const char *value, Error **errp)
311 {
312 CryptoDevBackendVhostUser *s =
313 CRYPTODEV_BACKEND_VHOST_USER(obj);
314
315 if (s->opened) {
316 error_setg(errp, QERR_PERMISSION_DENIED);
317 } else {
318 g_free(s->chr_name);
319 s->chr_name = g_strdup(value);
320 }
321 }
322
323 static char *
324 cryptodev_vhost_user_get_chardev(Object *obj, Error **errp)
325 {
326 CryptoDevBackendVhostUser *s =
327 CRYPTODEV_BACKEND_VHOST_USER(obj);
328 Chardev *chr = qemu_chr_fe_get_driver(&s->chr);
329
330 if (chr && chr->label) {
331 return g_strdup(chr->label);
332 }
333
334 return NULL;
335 }
336
337 static void cryptodev_vhost_user_finalize(Object *obj)
338 {
339 CryptoDevBackendVhostUser *s =
340 CRYPTODEV_BACKEND_VHOST_USER(obj);
341
342 qemu_chr_fe_deinit(&s->chr, false);
343
344 g_free(s->chr_name);
345 }
346
347 static void
348 cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
349 {
350 CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
351
352 bc->init = cryptodev_vhost_user_init;
353 bc->cleanup = cryptodev_vhost_user_cleanup;
354 bc->create_session = cryptodev_vhost_user_sym_create_session;
355 bc->close_session = cryptodev_vhost_user_sym_close_session;
356 bc->do_sym_op = NULL;
357
358 object_class_property_add_str(oc, "chardev",
359 cryptodev_vhost_user_get_chardev,
360 cryptodev_vhost_user_set_chardev);
361
362 }
363
364 static const TypeInfo cryptodev_vhost_user_info = {
365 .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER,
366 .parent = TYPE_CRYPTODEV_BACKEND,
367 .class_init = cryptodev_vhost_user_class_init,
368 .instance_finalize = cryptodev_vhost_user_finalize,
369 .instance_size = sizeof(CryptoDevBackendVhostUser),
370 };
371
372 static void
373 cryptodev_vhost_user_register_types(void)
374 {
375 type_register_static(&cryptodev_vhost_user_info);
376 }
377
378 type_init(cryptodev_vhost_user_register_types);