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f6d3afb5 ZC |
1 | /* |
2 | * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. | |
3 | * Copyright (c) 2016 FUJITSU LIMITED | |
4 | * Copyright (c) 2016 Intel Corporation | |
5 | * | |
6 | * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> | |
7 | * | |
8 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
9 | * later. See the COPYING file in the top-level directory. | |
10 | */ | |
11 | ||
12 | #include "qemu/osdep.h" | |
13 | #include "net/filter.h" | |
14 | #include "net/net.h" | |
f6d3afb5 | 15 | #include "qapi/error.h" |
f6d3afb5 ZC |
16 | #include "qom/object.h" |
17 | #include "qemu/main-loop.h" | |
18 | #include "qemu/error-report.h" | |
19 | #include "trace.h" | |
4d43a603 | 20 | #include "chardev/char-fe.h" |
f6d3afb5 ZC |
21 | #include "qemu/iov.h" |
22 | #include "qemu/sockets.h" | |
61138296 | 23 | #include "block/aio-wait.h" |
f6d3afb5 | 24 | |
db1015e9 EH |
25 | #define TYPE_FILTER_MIRROR "filter-mirror" |
26 | typedef struct MirrorState MirrorState; | |
8110fa1d EH |
27 | DECLARE_INSTANCE_CHECKER(MirrorState, FILTER_MIRROR, |
28 | TYPE_FILTER_MIRROR) | |
f6d3afb5 | 29 | |
db1015e9 | 30 | #define TYPE_FILTER_REDIRECTOR "filter-redirector" |
8110fa1d EH |
31 | DECLARE_INSTANCE_CHECKER(MirrorState, FILTER_REDIRECTOR, |
32 | TYPE_FILTER_REDIRECTOR) | |
d46f75b2 | 33 | |
d46f75b2 | 34 | #define REDIRECTOR_MAX_LEN NET_BUFSIZE |
f6d3afb5 | 35 | |
db1015e9 | 36 | struct MirrorState { |
f6d3afb5 | 37 | NetFilterState parent_obj; |
d46f75b2 | 38 | char *indev; |
f6d3afb5 | 39 | char *outdev; |
32a6ebec MAL |
40 | CharBackend chr_in; |
41 | CharBackend chr_out; | |
16a3df40 | 42 | SocketReadState rs; |
e2521f0e | 43 | bool vnet_hdr; |
db1015e9 | 44 | }; |
f6d3afb5 | 45 | |
61138296 RL |
46 | typedef struct FilterSendCo { |
47 | MirrorState *s; | |
48 | char *buf; | |
49 | ssize_t size; | |
50 | bool done; | |
51 | int ret; | |
52 | } FilterSendCo; | |
53 | ||
54 | static int _filter_send(MirrorState *s, | |
55 | char *buf, | |
56 | ssize_t size) | |
f6d3afb5 | 57 | { |
e2521f0e | 58 | NetFilterState *nf = NETFILTER(s); |
f6d3afb5 | 59 | int ret = 0; |
f0aabd5c | 60 | uint32_t len = 0; |
f6d3afb5 ZC |
61 | |
62 | len = htonl(size); | |
dc3c5ac6 | 63 | ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); |
f6d3afb5 ZC |
64 | if (ret != sizeof(len)) { |
65 | goto err; | |
66 | } | |
67 | ||
e2521f0e ZC |
68 | if (s->vnet_hdr) { |
69 | /* | |
70 | * If vnet_hdr = on, we send vnet header len to make other | |
71 | * module(like colo-compare) know how to parse net | |
72 | * packet correctly. | |
73 | */ | |
74 | ssize_t vnet_hdr_len; | |
75 | ||
76 | vnet_hdr_len = nf->netdev->vnet_hdr_len; | |
77 | ||
78 | len = htonl(vnet_hdr_len); | |
79 | ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); | |
80 | if (ret != sizeof(len)) { | |
81 | goto err; | |
82 | } | |
83 | } | |
84 | ||
dc3c5ac6 | 85 | ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size); |
f6d3afb5 ZC |
86 | if (ret != size) { |
87 | goto err; | |
88 | } | |
89 | ||
7c2eae9a | 90 | return size; |
f6d3afb5 ZC |
91 | |
92 | err: | |
93 | return ret < 0 ? ret : -EIO; | |
94 | } | |
95 | ||
61138296 RL |
96 | static void coroutine_fn filter_send_co(void *opaque) |
97 | { | |
98 | FilterSendCo *data = opaque; | |
99 | ||
100 | data->ret = _filter_send(data->s, data->buf, data->size); | |
101 | data->done = true; | |
102 | g_free(data->buf); | |
103 | aio_wait_kick(); | |
104 | } | |
105 | ||
106 | static int filter_send(MirrorState *s, | |
107 | const struct iovec *iov, | |
108 | int iovcnt) | |
109 | { | |
110 | ssize_t size = iov_size(iov, iovcnt); | |
111 | char *buf = NULL; | |
112 | ||
113 | if (!size) { | |
114 | return 0; | |
115 | } | |
116 | ||
117 | buf = g_malloc(size); | |
118 | iov_to_buf(iov, iovcnt, 0, buf, size); | |
119 | ||
120 | FilterSendCo data = { | |
121 | .s = s, | |
122 | .size = size, | |
123 | .buf = buf, | |
124 | .ret = 0, | |
125 | }; | |
126 | ||
127 | Coroutine *co = qemu_coroutine_create(filter_send_co, &data); | |
128 | qemu_coroutine_enter(co); | |
129 | ||
130 | while (!data.done) { | |
131 | aio_poll(qemu_get_aio_context(), true); | |
132 | } | |
133 | ||
134 | return data.ret; | |
135 | } | |
136 | ||
f0aabd5c ZC |
137 | static void redirector_to_filter(NetFilterState *nf, |
138 | const uint8_t *buf, | |
139 | int len) | |
d46f75b2 ZC |
140 | { |
141 | struct iovec iov = { | |
142 | .iov_base = (void *)buf, | |
143 | .iov_len = len, | |
144 | }; | |
145 | ||
146 | if (nf->direction == NET_FILTER_DIRECTION_ALL || | |
147 | nf->direction == NET_FILTER_DIRECTION_TX) { | |
148 | qemu_netfilter_pass_to_next(nf->netdev, 0, &iov, 1, nf); | |
149 | } | |
150 | ||
151 | if (nf->direction == NET_FILTER_DIRECTION_ALL || | |
152 | nf->direction == NET_FILTER_DIRECTION_RX) { | |
153 | qemu_netfilter_pass_to_next(nf->netdev->peer, 0, &iov, 1, nf); | |
154 | } | |
155 | } | |
156 | ||
157 | static int redirector_chr_can_read(void *opaque) | |
158 | { | |
159 | return REDIRECTOR_MAX_LEN; | |
160 | } | |
161 | ||
162 | static void redirector_chr_read(void *opaque, const uint8_t *buf, int size) | |
163 | { | |
164 | NetFilterState *nf = opaque; | |
165 | MirrorState *s = FILTER_REDIRECTOR(nf); | |
16a3df40 ZC |
166 | int ret; |
167 | ||
168 | ret = net_fill_rstate(&s->rs, buf, size); | |
169 | ||
170 | if (ret == -1) { | |
39ab61c6 | 171 | qemu_chr_fe_set_handlers(&s->chr_in, NULL, NULL, NULL, |
81517ba3 | 172 | NULL, NULL, NULL, true); |
d46f75b2 ZC |
173 | } |
174 | } | |
175 | ||
083b266f | 176 | static void redirector_chr_event(void *opaque, QEMUChrEvent event) |
d46f75b2 ZC |
177 | { |
178 | NetFilterState *nf = opaque; | |
179 | MirrorState *s = FILTER_REDIRECTOR(nf); | |
180 | ||
181 | switch (event) { | |
182 | case CHR_EVENT_CLOSED: | |
39ab61c6 | 183 | qemu_chr_fe_set_handlers(&s->chr_in, NULL, NULL, NULL, |
81517ba3 | 184 | NULL, NULL, NULL, true); |
d46f75b2 ZC |
185 | break; |
186 | default: | |
187 | break; | |
188 | } | |
189 | } | |
190 | ||
f6d3afb5 ZC |
191 | static ssize_t filter_mirror_receive_iov(NetFilterState *nf, |
192 | NetClientState *sender, | |
193 | unsigned flags, | |
194 | const struct iovec *iov, | |
195 | int iovcnt, | |
196 | NetPacketSent *sent_cb) | |
197 | { | |
ba8940dd | 198 | MirrorState *s = FILTER_MIRROR(nf); |
f6d3afb5 ZC |
199 | int ret; |
200 | ||
dc3c5ac6 | 201 | ret = filter_send(s, iov, iovcnt); |
7c2eae9a | 202 | if (ret < 0) { |
e05dc4cf | 203 | error_report("filter mirror send failed(%s)", strerror(-ret)); |
f6d3afb5 ZC |
204 | } |
205 | ||
206 | /* | |
207 | * we don't hope this error interrupt the normal | |
208 | * path of net packet, so we always return zero. | |
209 | */ | |
210 | return 0; | |
211 | } | |
212 | ||
d46f75b2 ZC |
213 | static ssize_t filter_redirector_receive_iov(NetFilterState *nf, |
214 | NetClientState *sender, | |
215 | unsigned flags, | |
216 | const struct iovec *iov, | |
217 | int iovcnt, | |
218 | NetPacketSent *sent_cb) | |
219 | { | |
220 | MirrorState *s = FILTER_REDIRECTOR(nf); | |
221 | int ret; | |
222 | ||
30650701 | 223 | if (qemu_chr_fe_backend_connected(&s->chr_out)) { |
dc3c5ac6 | 224 | ret = filter_send(s, iov, iovcnt); |
7c2eae9a | 225 | if (ret < 0) { |
e05dc4cf | 226 | error_report("filter redirector send failed(%s)", strerror(-ret)); |
d46f75b2 | 227 | } |
7c2eae9a | 228 | return ret; |
d46f75b2 ZC |
229 | } else { |
230 | return 0; | |
231 | } | |
232 | } | |
233 | ||
f6d3afb5 ZC |
234 | static void filter_mirror_cleanup(NetFilterState *nf) |
235 | { | |
236 | MirrorState *s = FILTER_MIRROR(nf); | |
237 | ||
1ce2610c | 238 | qemu_chr_fe_deinit(&s->chr_out, false); |
f6d3afb5 ZC |
239 | } |
240 | ||
d46f75b2 ZC |
241 | static void filter_redirector_cleanup(NetFilterState *nf) |
242 | { | |
243 | MirrorState *s = FILTER_REDIRECTOR(nf); | |
244 | ||
1ce2610c MAL |
245 | qemu_chr_fe_deinit(&s->chr_in, false); |
246 | qemu_chr_fe_deinit(&s->chr_out, false); | |
d46f75b2 ZC |
247 | } |
248 | ||
f6d3afb5 ZC |
249 | static void filter_mirror_setup(NetFilterState *nf, Error **errp) |
250 | { | |
251 | MirrorState *s = FILTER_MIRROR(nf); | |
0ec7b3e7 | 252 | Chardev *chr; |
f6d3afb5 | 253 | |
aa1530de EO |
254 | if (s->outdev == NULL) { |
255 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, "filter-mirror parameter"\ | |
256 | " 'outdev' cannot be empty"); | |
257 | return; | |
258 | } | |
259 | ||
32a6ebec MAL |
260 | chr = qemu_chr_find(s->outdev); |
261 | if (chr == NULL) { | |
f6d3afb5 ZC |
262 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
263 | "Device '%s' not found", s->outdev); | |
264 | return; | |
265 | } | |
266 | ||
32a6ebec | 267 | qemu_chr_fe_init(&s->chr_out, chr, errp); |
f6d3afb5 ZC |
268 | } |
269 | ||
16a3df40 ZC |
270 | static void redirector_rs_finalize(SocketReadState *rs) |
271 | { | |
272 | MirrorState *s = container_of(rs, MirrorState, rs); | |
273 | NetFilterState *nf = NETFILTER(s); | |
274 | ||
275 | redirector_to_filter(nf, rs->buf, rs->packet_len); | |
276 | } | |
277 | ||
d46f75b2 ZC |
278 | static void filter_redirector_setup(NetFilterState *nf, Error **errp) |
279 | { | |
280 | MirrorState *s = FILTER_REDIRECTOR(nf); | |
0ec7b3e7 | 281 | Chardev *chr; |
d46f75b2 ZC |
282 | |
283 | if (!s->indev && !s->outdev) { | |
284 | error_setg(errp, "filter redirector needs 'indev' or " | |
285 | "'outdev' at least one property set"); | |
286 | return; | |
287 | } else if (s->indev && s->outdev) { | |
288 | if (!strcmp(s->indev, s->outdev)) { | |
289 | error_setg(errp, "'indev' and 'outdev' could not be same " | |
290 | "for filter redirector"); | |
291 | return; | |
292 | } | |
293 | } | |
294 | ||
e2521f0e | 295 | net_socket_rs_init(&s->rs, redirector_rs_finalize, s->vnet_hdr); |
d46f75b2 ZC |
296 | |
297 | if (s->indev) { | |
32a6ebec MAL |
298 | chr = qemu_chr_find(s->indev); |
299 | if (chr == NULL) { | |
d46f75b2 ZC |
300 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
301 | "IN Device '%s' not found", s->indev); | |
302 | return; | |
303 | } | |
304 | ||
32a6ebec MAL |
305 | if (!qemu_chr_fe_init(&s->chr_in, chr, errp)) { |
306 | return; | |
307 | } | |
5345fdb4 MAL |
308 | |
309 | qemu_chr_fe_set_handlers(&s->chr_in, redirector_chr_can_read, | |
310 | redirector_chr_read, redirector_chr_event, | |
81517ba3 | 311 | NULL, nf, NULL, true); |
d46f75b2 ZC |
312 | } |
313 | ||
314 | if (s->outdev) { | |
32a6ebec MAL |
315 | chr = qemu_chr_find(s->outdev); |
316 | if (chr == NULL) { | |
d46f75b2 ZC |
317 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
318 | "OUT Device '%s' not found", s->outdev); | |
319 | return; | |
320 | } | |
32a6ebec MAL |
321 | if (!qemu_chr_fe_init(&s->chr_out, chr, errp)) { |
322 | return; | |
323 | } | |
d46f75b2 ZC |
324 | } |
325 | } | |
326 | ||
d46f75b2 ZC |
327 | static char *filter_redirector_get_indev(Object *obj, Error **errp) |
328 | { | |
329 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
330 | ||
331 | return g_strdup(s->indev); | |
332 | } | |
333 | ||
e05dc4cf ZC |
334 | static void filter_redirector_set_indev(Object *obj, |
335 | const char *value, | |
336 | Error **errp) | |
d46f75b2 ZC |
337 | { |
338 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
339 | ||
340 | g_free(s->indev); | |
341 | s->indev = g_strdup(value); | |
342 | } | |
343 | ||
f6d3afb5 ZC |
344 | static char *filter_mirror_get_outdev(Object *obj, Error **errp) |
345 | { | |
346 | MirrorState *s = FILTER_MIRROR(obj); | |
347 | ||
348 | return g_strdup(s->outdev); | |
349 | } | |
350 | ||
e05dc4cf ZC |
351 | static void filter_mirror_set_outdev(Object *obj, |
352 | const char *value, | |
353 | Error **errp) | |
f6d3afb5 ZC |
354 | { |
355 | MirrorState *s = FILTER_MIRROR(obj); | |
356 | ||
357 | g_free(s->outdev); | |
358 | s->outdev = g_strdup(value); | |
359 | if (!s->outdev) { | |
52cfcb46 | 360 | error_setg(errp, "filter mirror needs 'outdev' " |
d46f75b2 | 361 | "property set"); |
f6d3afb5 ZC |
362 | return; |
363 | } | |
364 | } | |
365 | ||
e2521f0e ZC |
366 | static bool filter_mirror_get_vnet_hdr(Object *obj, Error **errp) |
367 | { | |
368 | MirrorState *s = FILTER_MIRROR(obj); | |
369 | ||
370 | return s->vnet_hdr; | |
371 | } | |
372 | ||
373 | static void filter_mirror_set_vnet_hdr(Object *obj, bool value, Error **errp) | |
374 | { | |
375 | MirrorState *s = FILTER_MIRROR(obj); | |
376 | ||
377 | s->vnet_hdr = value; | |
378 | } | |
379 | ||
d46f75b2 ZC |
380 | static char *filter_redirector_get_outdev(Object *obj, Error **errp) |
381 | { | |
382 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
383 | ||
384 | return g_strdup(s->outdev); | |
385 | } | |
386 | ||
e05dc4cf ZC |
387 | static void filter_redirector_set_outdev(Object *obj, |
388 | const char *value, | |
389 | Error **errp) | |
d46f75b2 ZC |
390 | { |
391 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
392 | ||
393 | g_free(s->outdev); | |
394 | s->outdev = g_strdup(value); | |
395 | } | |
396 | ||
00d5c240 ZC |
397 | static bool filter_redirector_get_vnet_hdr(Object *obj, Error **errp) |
398 | { | |
399 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
400 | ||
401 | return s->vnet_hdr; | |
402 | } | |
403 | ||
404 | static void filter_redirector_set_vnet_hdr(Object *obj, | |
405 | bool value, | |
406 | Error **errp) | |
407 | { | |
408 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
409 | ||
410 | s->vnet_hdr = value; | |
411 | } | |
412 | ||
6d11ea6d EH |
413 | static void filter_mirror_class_init(ObjectClass *oc, void *data) |
414 | { | |
415 | NetFilterClass *nfc = NETFILTER_CLASS(oc); | |
416 | ||
f0e34a06 EH |
417 | object_class_property_add_str(oc, "outdev", filter_mirror_get_outdev, |
418 | filter_mirror_set_outdev); | |
419 | object_class_property_add_bool(oc, "vnet_hdr_support", | |
420 | filter_mirror_get_vnet_hdr, | |
421 | filter_mirror_set_vnet_hdr); | |
422 | ||
6d11ea6d EH |
423 | nfc->setup = filter_mirror_setup; |
424 | nfc->cleanup = filter_mirror_cleanup; | |
425 | nfc->receive_iov = filter_mirror_receive_iov; | |
426 | } | |
427 | ||
428 | static void filter_redirector_class_init(ObjectClass *oc, void *data) | |
429 | { | |
430 | NetFilterClass *nfc = NETFILTER_CLASS(oc); | |
431 | ||
f0e34a06 EH |
432 | object_class_property_add_str(oc, "indev", filter_redirector_get_indev, |
433 | filter_redirector_set_indev); | |
434 | object_class_property_add_str(oc, "outdev", filter_redirector_get_outdev, | |
435 | filter_redirector_set_outdev); | |
436 | object_class_property_add_bool(oc, "vnet_hdr_support", | |
437 | filter_redirector_get_vnet_hdr, | |
438 | filter_redirector_set_vnet_hdr); | |
439 | ||
6d11ea6d EH |
440 | nfc->setup = filter_redirector_setup; |
441 | nfc->cleanup = filter_redirector_cleanup; | |
442 | nfc->receive_iov = filter_redirector_receive_iov; | |
443 | } | |
444 | ||
f6d3afb5 ZC |
445 | static void filter_mirror_init(Object *obj) |
446 | { | |
e2521f0e ZC |
447 | MirrorState *s = FILTER_MIRROR(obj); |
448 | ||
e2521f0e | 449 | s->vnet_hdr = false; |
f6d3afb5 ZC |
450 | } |
451 | ||
d46f75b2 ZC |
452 | static void filter_redirector_init(Object *obj) |
453 | { | |
00d5c240 ZC |
454 | MirrorState *s = FILTER_REDIRECTOR(obj); |
455 | ||
00d5c240 | 456 | s->vnet_hdr = false; |
d46f75b2 ZC |
457 | } |
458 | ||
f6d3afb5 ZC |
459 | static void filter_mirror_fini(Object *obj) |
460 | { | |
461 | MirrorState *s = FILTER_MIRROR(obj); | |
462 | ||
463 | g_free(s->outdev); | |
464 | } | |
465 | ||
d46f75b2 ZC |
466 | static void filter_redirector_fini(Object *obj) |
467 | { | |
468 | MirrorState *s = FILTER_REDIRECTOR(obj); | |
469 | ||
470 | g_free(s->indev); | |
471 | g_free(s->outdev); | |
472 | } | |
473 | ||
474 | static const TypeInfo filter_redirector_info = { | |
475 | .name = TYPE_FILTER_REDIRECTOR, | |
476 | .parent = TYPE_NETFILTER, | |
477 | .class_init = filter_redirector_class_init, | |
478 | .instance_init = filter_redirector_init, | |
479 | .instance_finalize = filter_redirector_fini, | |
480 | .instance_size = sizeof(MirrorState), | |
481 | }; | |
482 | ||
f6d3afb5 ZC |
483 | static const TypeInfo filter_mirror_info = { |
484 | .name = TYPE_FILTER_MIRROR, | |
485 | .parent = TYPE_NETFILTER, | |
486 | .class_init = filter_mirror_class_init, | |
487 | .instance_init = filter_mirror_init, | |
488 | .instance_finalize = filter_mirror_fini, | |
489 | .instance_size = sizeof(MirrorState), | |
490 | }; | |
491 | ||
492 | static void register_types(void) | |
493 | { | |
494 | type_register_static(&filter_mirror_info); | |
d46f75b2 | 495 | type_register_static(&filter_redirector_info); |
f6d3afb5 ZC |
496 | } |
497 | ||
498 | type_init(register_types); |