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Gonglei042cea22018-03-01 21:46:28 +08001/*
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"
Gonglei042cea22018-03-01 21:46:28 +080025#include "qapi/error.h"
26#include "qapi/qmp/qerror.h"
27#include "qemu/error-report.h"
Tiwei Bie4d0cf552018-05-24 18:33:33 +080028#include "hw/virtio/vhost-user.h"
Gonglei042cea22018-03-01 21:46:28 +080029#include "standard-headers/linux/virtio_crypto.h"
30#include "sysemu/cryptodev-vhost.h"
31#include "chardev/char-fe.h"
Gonglei5da73da2018-03-01 21:46:29 +080032#include "sysemu/cryptodev-vhost-user.h"
Gonglei042cea22018-03-01 21:46:28 +080033
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
46typedef struct CryptoDevBackendVhostUser {
47 CryptoDevBackend parent_obj;
48
Marc-André Lureau0b99f222019-03-08 15:04:45 +010049 VhostUserState vhost_user;
Gonglei042cea22018-03-01 21:46:28 +080050 CharBackend chr;
51 char *chr_name;
52 bool opened;
53 CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM];
54} CryptoDevBackendVhostUser;
55
56static int
57cryptodev_vhost_user_running(
58 CryptoDevBackendVhost *crypto)
59{
60 return crypto ? 1 : 0;
61}
62
Gonglei5da73da2018-03-01 21:46:29 +080063CryptoDevBackendVhost *
64cryptodev_vhost_user_get_vhost(
65 CryptoDevBackendClient *cc,
66 CryptoDevBackend *b,
67 uint16_t queue)
68{
69 CryptoDevBackendVhostUser *s =
70 CRYPTODEV_BACKEND_VHOST_USER(b);
71 assert(cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER);
72 assert(queue < MAX_CRYPTO_QUEUE_NUM);
73
74 return s->vhost_crypto[queue];
75}
76
Gonglei042cea22018-03-01 21:46:28 +080077static void cryptodev_vhost_user_stop(int queues,
78 CryptoDevBackendVhostUser *s)
79{
80 size_t i;
81
82 for (i = 0; i < queues; i++) {
83 if (!cryptodev_vhost_user_running(s->vhost_crypto[i])) {
84 continue;
85 }
86
87 cryptodev_vhost_cleanup(s->vhost_crypto[i]);
88 s->vhost_crypto[i] = NULL;
89 }
90}
91
92static int
93cryptodev_vhost_user_start(int queues,
94 CryptoDevBackendVhostUser *s)
95{
96 CryptoDevBackendVhostOptions options;
97 CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
98 int max_queues;
99 size_t i;
100
101 for (i = 0; i < queues; i++) {
102 if (cryptodev_vhost_user_running(s->vhost_crypto[i])) {
103 continue;
104 }
105
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100106 options.opaque = &s->vhost_user;
Gonglei042cea22018-03-01 21:46:28 +0800107 options.backend_type = VHOST_BACKEND_TYPE_USER;
108 options.cc = b->conf.peers.ccs[i];
109 s->vhost_crypto[i] = cryptodev_vhost_init(&options);
110 if (!s->vhost_crypto[i]) {
111 error_report("failed to init vhost_crypto for queue %zu", i);
112 goto err;
113 }
114
115 if (i == 0) {
116 max_queues =
117 cryptodev_vhost_get_max_queues(s->vhost_crypto[i]);
118 if (queues > max_queues) {
119 error_report("you are asking more queues than supported: %d",
120 max_queues);
121 goto err;
122 }
123 }
124 }
125
126 return 0;
127
128err:
129 cryptodev_vhost_user_stop(i + 1, s);
130 return -1;
131}
132
133static Chardev *
134cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s,
135 Error **errp)
136{
137 Chardev *chr;
138
139 if (s->chr_name == NULL) {
140 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
141 "chardev", "a valid character device");
142 return NULL;
143 }
144
145 chr = qemu_chr_find(s->chr_name);
146 if (chr == NULL) {
147 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
148 "Device '%s' not found", s->chr_name);
149 return NULL;
150 }
151
152 return chr;
153}
154
Philippe Mathieu-Daudé083b2662019-12-18 18:20:09 +0100155static void cryptodev_vhost_user_event(void *opaque, QEMUChrEvent event)
Gonglei042cea22018-03-01 21:46:28 +0800156{
157 CryptoDevBackendVhostUser *s = opaque;
158 CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
Gonglei042cea22018-03-01 21:46:28 +0800159 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;
Philippe Mathieu-Daudé5b082922019-12-18 18:20:02 +0100174 case CHR_EVENT_BREAK:
175 case CHR_EVENT_MUX_IN:
176 case CHR_EVENT_MUX_OUT:
177 /* Ignore */
178 break;
Gonglei042cea22018-03-01 21:46:28 +0800179 }
Gonglei042cea22018-03-01 21:46:28 +0800180}
181
182static void cryptodev_vhost_user_init(
183 CryptoDevBackend *backend, Error **errp)
184{
185 int queues = backend->conf.peers.queues;
186 size_t i;
187 Error *local_err = NULL;
188 Chardev *chr;
189 CryptoDevBackendClient *cc;
190 CryptoDevBackendVhostUser *s =
191 CRYPTODEV_BACKEND_VHOST_USER(backend);
192
193 chr = cryptodev_vhost_claim_chardev(s, &local_err);
194 if (local_err) {
195 error_propagate(errp, local_err);
196 return;
197 }
198
199 s->opened = true;
200
201 for (i = 0; i < queues; i++) {
202 cc = cryptodev_backend_new_client(
203 "cryptodev-vhost-user", NULL);
204 cc->info_str = g_strdup_printf("cryptodev-vhost-user%zu to %s ",
205 i, chr->label);
206 cc->queue_index = i;
Gonglei5da73da2018-03-01 21:46:29 +0800207 cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER;
Gonglei042cea22018-03-01 21:46:28 +0800208
209 backend->conf.peers.ccs[i] = cc;
210
211 if (i == 0) {
212 if (!qemu_chr_fe_init(&s->chr, chr, &local_err)) {
213 error_propagate(errp, local_err);
214 return;
215 }
216 }
217 }
218
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100219 if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) {
Tiwei Bie4d0cf552018-05-24 18:33:33 +0800220 return;
221 }
222
Gonglei042cea22018-03-01 21:46:28 +0800223 qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
224 cryptodev_vhost_user_event, NULL, s, NULL, true);
225
226 backend->conf.crypto_services =
227 1u << VIRTIO_CRYPTO_SERVICE_CIPHER |
228 1u << VIRTIO_CRYPTO_SERVICE_HASH |
229 1u << VIRTIO_CRYPTO_SERVICE_MAC;
230 backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
231 backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
Gonglei0a9b9be2018-03-01 21:46:31 +0800232
233 backend->conf.max_size = UINT64_MAX;
234 backend->conf.max_cipher_key_len = VHOST_USER_MAX_CIPHER_KEY_LEN;
235 backend->conf.max_auth_key_len = VHOST_USER_MAX_AUTH_KEY_LEN;
Gonglei042cea22018-03-01 21:46:28 +0800236}
237
238static int64_t cryptodev_vhost_user_sym_create_session(
239 CryptoDevBackend *backend,
240 CryptoDevBackendSymSessionInfo *sess_info,
241 uint32_t queue_index, Error **errp)
242{
Gongleiefbfeb82018-03-01 21:46:30 +0800243 CryptoDevBackendClient *cc =
244 backend->conf.peers.ccs[queue_index];
245 CryptoDevBackendVhost *vhost_crypto;
246 uint64_t session_id = 0;
247 int ret;
248
249 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
250 if (vhost_crypto) {
251 struct vhost_dev *dev = &(vhost_crypto->dev);
252 ret = dev->vhost_ops->vhost_crypto_create_session(dev,
253 sess_info,
254 &session_id);
255 if (ret < 0) {
256 return -1;
257 } else {
258 return session_id;
259 }
260 }
261 return -1;
Gonglei042cea22018-03-01 21:46:28 +0800262}
263
264static int cryptodev_vhost_user_sym_close_session(
265 CryptoDevBackend *backend,
266 uint64_t session_id,
267 uint32_t queue_index, Error **errp)
268{
Gongleiefbfeb82018-03-01 21:46:30 +0800269 CryptoDevBackendClient *cc =
270 backend->conf.peers.ccs[queue_index];
271 CryptoDevBackendVhost *vhost_crypto;
272 int ret;
Gonglei042cea22018-03-01 21:46:28 +0800273
Gongleiefbfeb82018-03-01 21:46:30 +0800274 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
275 if (vhost_crypto) {
276 struct vhost_dev *dev = &(vhost_crypto->dev);
277 ret = dev->vhost_ops->vhost_crypto_close_session(dev,
278 session_id);
279 if (ret < 0) {
280 return -1;
281 } else {
282 return 0;
283 }
284 }
285 return -1;
Gonglei042cea22018-03-01 21:46:28 +0800286}
287
288static void cryptodev_vhost_user_cleanup(
289 CryptoDevBackend *backend,
290 Error **errp)
291{
292 CryptoDevBackendVhostUser *s =
293 CRYPTODEV_BACKEND_VHOST_USER(backend);
294 size_t i;
295 int queues = backend->conf.peers.queues;
296 CryptoDevBackendClient *cc;
297
298 cryptodev_vhost_user_stop(queues, s);
299
300 for (i = 0; i < queues; i++) {
301 cc = backend->conf.peers.ccs[i];
302 if (cc) {
303 cryptodev_backend_free_client(cc);
304 backend->conf.peers.ccs[i] = NULL;
305 }
306 }
Tiwei Bie4d0cf552018-05-24 18:33:33 +0800307
Marc-André Lureau0b99f222019-03-08 15:04:45 +0100308 vhost_user_cleanup(&s->vhost_user);
Gonglei042cea22018-03-01 21:46:28 +0800309}
310
311static void cryptodev_vhost_user_set_chardev(Object *obj,
312 const char *value, Error **errp)
313{
314 CryptoDevBackendVhostUser *s =
315 CRYPTODEV_BACKEND_VHOST_USER(obj);
316
317 if (s->opened) {
318 error_setg(errp, QERR_PERMISSION_DENIED);
319 } else {
320 g_free(s->chr_name);
321 s->chr_name = g_strdup(value);
322 }
323}
324
325static char *
326cryptodev_vhost_user_get_chardev(Object *obj, Error **errp)
327{
328 CryptoDevBackendVhostUser *s =
329 CRYPTODEV_BACKEND_VHOST_USER(obj);
330 Chardev *chr = qemu_chr_fe_get_driver(&s->chr);
331
332 if (chr && chr->label) {
333 return g_strdup(chr->label);
334 }
335
336 return NULL;
337}
338
339static void cryptodev_vhost_user_instance_int(Object *obj)
340{
341 object_property_add_str(obj, "chardev",
342 cryptodev_vhost_user_get_chardev,
343 cryptodev_vhost_user_set_chardev,
344 NULL);
345}
346
347static void cryptodev_vhost_user_finalize(Object *obj)
348{
349 CryptoDevBackendVhostUser *s =
350 CRYPTODEV_BACKEND_VHOST_USER(obj);
351
352 qemu_chr_fe_deinit(&s->chr, false);
353
354 g_free(s->chr_name);
355}
356
357static void
358cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
359{
360 CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
361
362 bc->init = cryptodev_vhost_user_init;
363 bc->cleanup = cryptodev_vhost_user_cleanup;
364 bc->create_session = cryptodev_vhost_user_sym_create_session;
365 bc->close_session = cryptodev_vhost_user_sym_close_session;
Gongleiefbfeb82018-03-01 21:46:30 +0800366 bc->do_sym_op = NULL;
Gonglei042cea22018-03-01 21:46:28 +0800367}
368
369static const TypeInfo cryptodev_vhost_user_info = {
370 .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER,
371 .parent = TYPE_CRYPTODEV_BACKEND,
372 .class_init = cryptodev_vhost_user_class_init,
373 .instance_init = cryptodev_vhost_user_instance_int,
374 .instance_finalize = cryptodev_vhost_user_finalize,
375 .instance_size = sizeof(CryptoDevBackendVhostUser),
376};
377
378static void
379cryptodev_vhost_user_register_types(void)
380{
381 type_register_static(&cryptodev_vhost_user_info);
382}
383
384type_init(cryptodev_vhost_user_register_types);