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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
38
39
40#define TYPE_CRYPTODEV_BACKEND_VHOST_USER "cryptodev-vhost-user"
41
42OBJECT_DECLARE_SIMPLE_TYPE(CryptoDevBackendVhostUser, CRYPTODEV_BACKEND_VHOST_USER)
43
44
45struct 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
55static int
56cryptodev_vhost_user_running(
57 CryptoDevBackendVhost *crypto)
58{
59 return crypto ? 1 : 0;
60}
61
62CryptoDevBackendVhost *
63cryptodev_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
76static 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
91static int
92cryptodev_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
127err:
128 cryptodev_vhost_user_stop(i + 1, s);
129 return -1;
130}
131
132static Chardev *
133cryptodev_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
154static 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
177 break;
178 }
179}
180
181static 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
236static 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
262static int64_t cryptodev_vhost_user_create_session(
263 CryptoDevBackend *backend,
264 CryptoDevBackendSessionInfo *sess_info,
265 uint32_t queue_index, Error **errp)
266{
267 uint32_t op_code = sess_info->op_code;
268 CryptoDevBackendSymSessionInfo *sym_sess_info;
269
270 switch (op_code) {
271 case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
272 case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
273 case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
274 case VIRTIO_CRYPTO_AEAD_CREATE_SESSION:
275 sym_sess_info = &sess_info->u.sym_sess_info;
276 return cryptodev_vhost_user_sym_create_session(backend, sym_sess_info,
277 queue_index, errp);
278 default:
279 error_setg(errp, "Unsupported opcode :%" PRIu32 "",
280 sess_info->op_code);
281 return -1;
282
283 }
284
285 return -1;
286}
287
288static int cryptodev_vhost_user_close_session(
289 CryptoDevBackend *backend,
290 uint64_t session_id,
291 uint32_t queue_index, Error **errp)
292{
293 CryptoDevBackendClient *cc =
294 backend->conf.peers.ccs[queue_index];
295 CryptoDevBackendVhost *vhost_crypto;
296 int ret;
297
298 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
299 if (vhost_crypto) {
300 struct vhost_dev *dev = &(vhost_crypto->dev);
301 ret = dev->vhost_ops->vhost_crypto_close_session(dev,
302 session_id);
303 if (ret < 0) {
304 return -1;
305 } else {
306 return 0;
307 }
308 }
309 return -1;
310}
311
312static void cryptodev_vhost_user_cleanup(
313 CryptoDevBackend *backend,
314 Error **errp)
315{
316 CryptoDevBackendVhostUser *s =
317 CRYPTODEV_BACKEND_VHOST_USER(backend);
318 size_t i;
319 int queues = backend->conf.peers.queues;
320 CryptoDevBackendClient *cc;
321
322 cryptodev_vhost_user_stop(queues, s);
323
324 for (i = 0; i < queues; i++) {
325 cc = backend->conf.peers.ccs[i];
326 if (cc) {
327 cryptodev_backend_free_client(cc);
328 backend->conf.peers.ccs[i] = NULL;
329 }
330 }
331
332 vhost_user_cleanup(&s->vhost_user);
333}
334
335static void cryptodev_vhost_user_set_chardev(Object *obj,
336 const char *value, Error **errp)
337{
338 CryptoDevBackendVhostUser *s =
339 CRYPTODEV_BACKEND_VHOST_USER(obj);
340
341 if (s->opened) {
342 error_setg(errp, QERR_PERMISSION_DENIED);
343 } else {
344 g_free(s->chr_name);
345 s->chr_name = g_strdup(value);
346 }
347}
348
349static char *
350cryptodev_vhost_user_get_chardev(Object *obj, Error **errp)
351{
352 CryptoDevBackendVhostUser *s =
353 CRYPTODEV_BACKEND_VHOST_USER(obj);
354 Chardev *chr = qemu_chr_fe_get_driver(&s->chr);
355
356 if (chr && chr->label) {
357 return g_strdup(chr->label);
358 }
359
360 return NULL;
361}
362
363static void cryptodev_vhost_user_finalize(Object *obj)
364{
365 CryptoDevBackendVhostUser *s =
366 CRYPTODEV_BACKEND_VHOST_USER(obj);
367
368 qemu_chr_fe_deinit(&s->chr, false);
369
370 g_free(s->chr_name);
371}
372
373static void
374cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
375{
376 CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
377
378 bc->init = cryptodev_vhost_user_init;
379 bc->cleanup = cryptodev_vhost_user_cleanup;
380 bc->create_session = cryptodev_vhost_user_create_session;
381 bc->close_session = cryptodev_vhost_user_close_session;
382 bc->do_op = NULL;
383
384 object_class_property_add_str(oc, "chardev",
385 cryptodev_vhost_user_get_chardev,
386 cryptodev_vhost_user_set_chardev);
387
388}
389
390static const TypeInfo cryptodev_vhost_user_info = {
391 .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER,
392 .parent = TYPE_CRYPTODEV_BACKEND,
393 .class_init = cryptodev_vhost_user_class_init,
394 .instance_finalize = cryptodev_vhost_user_finalize,
395 .instance_size = sizeof(CryptoDevBackendVhostUser),
396};
397
398static void
399cryptodev_vhost_user_register_types(void)
400{
401 type_register_static(&cryptodev_vhost_user_info);
402}
403
404type_init(cryptodev_vhost_user_register_types);
405
