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Commit | Line | Data |
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7dce4e6f ZC |
1 | /* |
2 | * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) | |
3 | * (a.k.a. Fault Tolerance or Continuous Replication) | |
4 | * | |
5 | * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. | |
6 | * Copyright (c) 2016 FUJITSU LIMITED | |
7 | * Copyright (c) 2016 Intel Corporation | |
8 | * | |
9 | * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> | |
10 | * | |
11 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
12 | * later. See the COPYING file in the top-level directory. | |
13 | */ | |
14 | ||
15 | #include "qemu/osdep.h" | |
16 | #include "qemu/error-report.h" | |
59509ec1 | 17 | #include "trace.h" |
7dce4e6f ZC |
18 | #include "qemu-common.h" |
19 | #include "qapi/qmp/qerror.h" | |
20 | #include "qapi/error.h" | |
21 | #include "net/net.h" | |
f4b61836 | 22 | #include "net/eth.h" |
7dce4e6f ZC |
23 | #include "qom/object_interfaces.h" |
24 | #include "qemu/iov.h" | |
25 | #include "qom/object.h" | |
26 | #include "qemu/typedefs.h" | |
27 | #include "net/queue.h" | |
28 | #include "sysemu/char.h" | |
29 | #include "qemu/sockets.h" | |
30 | #include "qapi-visit.h" | |
59509ec1 | 31 | #include "net/colo.h" |
7dce4e6f ZC |
32 | |
33 | #define TYPE_COLO_COMPARE "colo-compare" | |
34 | #define COLO_COMPARE(obj) \ | |
35 | OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE) | |
36 | ||
0682e15b | 37 | #define COMPARE_READ_LEN_MAX NET_BUFSIZE |
b6540d40 ZC |
38 | #define MAX_QUEUE_SIZE 1024 |
39 | ||
0682e15b ZC |
40 | /* TODO: Should be configurable */ |
41 | #define REGULAR_PACKET_CHECK_MS 3000 | |
42 | ||
59509ec1 ZC |
43 | /* |
44 | + CompareState ++ | |
45 | | | | |
46 | +---------------+ +---------------+ +---------------+ | |
47 | |conn list +--->conn +--------->conn | | |
48 | +---------------+ +---------------+ +---------------+ | |
49 | | | | | | | | |
50 | +---------------+ +---v----+ +---v----+ +---v----+ +---v----+ | |
51 | |primary | |secondary |primary | |secondary | |
52 | |packet | |packet + |packet | |packet + | |
53 | +--------+ +--------+ +--------+ +--------+ | |
54 | | | | | | |
55 | +---v----+ +---v----+ +---v----+ +---v----+ | |
56 | |primary | |secondary |primary | |secondary | |
57 | |packet | |packet + |packet | |packet + | |
58 | +--------+ +--------+ +--------+ +--------+ | |
59 | | | | | | |
60 | +---v----+ +---v----+ +---v----+ +---v----+ | |
61 | |primary | |secondary |primary | |secondary | |
62 | |packet | |packet + |packet | |packet + | |
63 | +--------+ +--------+ +--------+ +--------+ | |
64 | */ | |
7dce4e6f ZC |
65 | typedef struct CompareState { |
66 | Object parent; | |
67 | ||
68 | char *pri_indev; | |
69 | char *sec_indev; | |
70 | char *outdev; | |
32a6ebec MAL |
71 | CharBackend chr_pri_in; |
72 | CharBackend chr_sec_in; | |
73 | CharBackend chr_out; | |
7dce4e6f ZC |
74 | SocketReadState pri_rs; |
75 | SocketReadState sec_rs; | |
59509ec1 | 76 | |
b6540d40 ZC |
77 | /* connection list: the connections belonged to this NIC could be found |
78 | * in this list. | |
79 | * element type: Connection | |
80 | */ | |
81 | GQueue conn_list; | |
59509ec1 ZC |
82 | /* hashtable to save connection */ |
83 | GHashTable *connection_track_table; | |
0682e15b ZC |
84 | /* compare thread, a thread for each NIC */ |
85 | QemuThread thread; | |
dfd917a9 | 86 | |
b43decb0 | 87 | GMainContext *worker_context; |
dfd917a9 | 88 | GMainLoop *compare_loop; |
7dce4e6f ZC |
89 | } CompareState; |
90 | ||
91 | typedef struct CompareClass { | |
92 | ObjectClass parent_class; | |
93 | } CompareClass; | |
94 | ||
59509ec1 ZC |
95 | enum { |
96 | PRIMARY_IN = 0, | |
97 | SECONDARY_IN, | |
98 | }; | |
99 | ||
5345fdb4 | 100 | static int compare_chr_send(CharBackend *out, |
59509ec1 ZC |
101 | const uint8_t *buf, |
102 | uint32_t size); | |
103 | ||
a935cc31 ZC |
104 | static gint seq_sorter(Packet *a, Packet *b, gpointer data) |
105 | { | |
106 | struct tcphdr *atcp, *btcp; | |
107 | ||
108 | atcp = (struct tcphdr *)(a->transport_header); | |
109 | btcp = (struct tcphdr *)(b->transport_header); | |
110 | return ntohl(atcp->th_seq) - ntohl(btcp->th_seq); | |
111 | } | |
112 | ||
59509ec1 ZC |
113 | /* |
114 | * Return 0 on success, if return -1 means the pkt | |
115 | * is unsupported(arp and ipv6) and will be sent later | |
116 | */ | |
117 | static int packet_enqueue(CompareState *s, int mode) | |
118 | { | |
b6540d40 | 119 | ConnectionKey key; |
59509ec1 | 120 | Packet *pkt = NULL; |
b6540d40 | 121 | Connection *conn; |
59509ec1 ZC |
122 | |
123 | if (mode == PRIMARY_IN) { | |
124 | pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len); | |
125 | } else { | |
126 | pkt = packet_new(s->sec_rs.buf, s->sec_rs.packet_len); | |
127 | } | |
128 | ||
129 | if (parse_packet_early(pkt)) { | |
130 | packet_destroy(pkt, NULL); | |
131 | pkt = NULL; | |
132 | return -1; | |
133 | } | |
b6540d40 | 134 | fill_connection_key(pkt, &key); |
59509ec1 | 135 | |
b6540d40 ZC |
136 | conn = connection_get(s->connection_track_table, |
137 | &key, | |
138 | &s->conn_list); | |
59509ec1 | 139 | |
b6540d40 ZC |
140 | if (!conn->processing) { |
141 | g_queue_push_tail(&s->conn_list, conn); | |
142 | conn->processing = true; | |
143 | } | |
144 | ||
145 | if (mode == PRIMARY_IN) { | |
146 | if (g_queue_get_length(&conn->primary_list) <= | |
147 | MAX_QUEUE_SIZE) { | |
148 | g_queue_push_tail(&conn->primary_list, pkt); | |
a935cc31 ZC |
149 | if (conn->ip_proto == IPPROTO_TCP) { |
150 | g_queue_sort(&conn->primary_list, | |
151 | (GCompareDataFunc)seq_sorter, | |
152 | NULL); | |
153 | } | |
b6540d40 ZC |
154 | } else { |
155 | error_report("colo compare primary queue size too big," | |
156 | "drop packet"); | |
157 | } | |
158 | } else { | |
159 | if (g_queue_get_length(&conn->secondary_list) <= | |
160 | MAX_QUEUE_SIZE) { | |
161 | g_queue_push_tail(&conn->secondary_list, pkt); | |
a935cc31 ZC |
162 | if (conn->ip_proto == IPPROTO_TCP) { |
163 | g_queue_sort(&conn->secondary_list, | |
164 | (GCompareDataFunc)seq_sorter, | |
165 | NULL); | |
166 | } | |
b6540d40 ZC |
167 | } else { |
168 | error_report("colo compare secondary queue size too big," | |
169 | "drop packet"); | |
170 | } | |
171 | } | |
59509ec1 ZC |
172 | |
173 | return 0; | |
174 | } | |
175 | ||
0682e15b ZC |
176 | /* |
177 | * The IP packets sent by primary and secondary | |
178 | * will be compared in here | |
179 | * TODO support ip fragment, Out-Of-Order | |
180 | * return: 0 means packet same | |
181 | * > 0 || < 0 means packet different | |
182 | */ | |
6efeb328 | 183 | static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset) |
0682e15b | 184 | { |
e630b2bf ZC |
185 | if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { |
186 | char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; | |
187 | ||
188 | strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); | |
189 | strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst)); | |
190 | strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src)); | |
191 | strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst)); | |
192 | ||
193 | trace_colo_compare_ip_info(ppkt->size, pri_ip_src, | |
194 | pri_ip_dst, spkt->size, | |
195 | sec_ip_src, sec_ip_dst); | |
196 | } | |
0682e15b ZC |
197 | |
198 | if (ppkt->size == spkt->size) { | |
6efeb328 ZC |
199 | return memcmp(ppkt->data + offset, spkt->data + offset, |
200 | spkt->size - offset); | |
0682e15b | 201 | } else { |
2ad7ca4c | 202 | trace_colo_compare_main("Net packet size are not the same"); |
0682e15b ZC |
203 | return -1; |
204 | } | |
205 | } | |
206 | ||
f4b61836 ZC |
207 | /* |
208 | * Called from the compare thread on the primary | |
209 | * for compare tcp packet | |
210 | * compare_tcp copied from Dr. David Alan Gilbert's branch | |
211 | */ | |
212 | static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt) | |
0682e15b | 213 | { |
f4b61836 ZC |
214 | struct tcphdr *ptcp, *stcp; |
215 | int res; | |
f4b61836 ZC |
216 | |
217 | trace_colo_compare_main("compare tcp"); | |
2ad7ca4c | 218 | |
f4b61836 ZC |
219 | ptcp = (struct tcphdr *)ppkt->transport_header; |
220 | stcp = (struct tcphdr *)spkt->transport_header; | |
221 | ||
222 | /* | |
223 | * The 'identification' field in the IP header is *very* random | |
224 | * it almost never matches. Fudge this by ignoring differences in | |
225 | * unfragmented packets; they'll normally sort themselves out if different | |
226 | * anyway, and it should recover at the TCP level. | |
227 | * An alternative would be to get both the primary and secondary to rewrite | |
228 | * somehow; but that would need some sync traffic to sync the state | |
229 | */ | |
230 | if (ntohs(ppkt->ip->ip_off) & IP_DF) { | |
231 | spkt->ip->ip_id = ppkt->ip->ip_id; | |
232 | /* and the sum will be different if the IDs were different */ | |
233 | spkt->ip->ip_sum = ppkt->ip->ip_sum; | |
234 | } | |
235 | ||
6efeb328 ZC |
236 | if (ptcp->th_sum == stcp->th_sum) { |
237 | res = colo_packet_compare_common(ppkt, spkt, ETH_HLEN); | |
238 | } else { | |
239 | res = -1; | |
240 | } | |
f4b61836 ZC |
241 | |
242 | if (res != 0 && trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { | |
2dfe5113 AB |
243 | trace_colo_compare_pkt_info_src(inet_ntoa(ppkt->ip->ip_src), |
244 | ntohl(stcp->th_seq), | |
245 | ntohl(stcp->th_ack), | |
246 | res, stcp->th_flags, | |
247 | spkt->size); | |
248 | ||
249 | trace_colo_compare_pkt_info_dst(inet_ntoa(ppkt->ip->ip_dst), | |
250 | ntohl(ptcp->th_seq), | |
251 | ntohl(ptcp->th_ack), | |
252 | res, ptcp->th_flags, | |
253 | ppkt->size); | |
2061c14c ZC |
254 | |
255 | qemu_hexdump((char *)ppkt->data, stderr, | |
256 | "colo-compare ppkt", ppkt->size); | |
257 | qemu_hexdump((char *)spkt->data, stderr, | |
258 | "colo-compare spkt", spkt->size); | |
f4b61836 ZC |
259 | } |
260 | ||
261 | return res; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Called from the compare thread on the primary | |
266 | * for compare udp packet | |
267 | */ | |
268 | static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt) | |
269 | { | |
270 | int ret; | |
6efeb328 | 271 | int network_header_length = ppkt->ip->ip_hl * 4; |
f4b61836 ZC |
272 | |
273 | trace_colo_compare_main("compare udp"); | |
2ad7ca4c | 274 | |
6efeb328 ZC |
275 | /* |
276 | * Because of ppkt and spkt are both in the same connection, | |
277 | * The ppkt's src ip, dst ip, src port, dst port, ip_proto all are | |
278 | * same with spkt. In addition, IP header's Identification is a random | |
279 | * field, we can handle it in IP fragmentation function later. | |
280 | * COLO just concern the response net packet payload from primary guest | |
281 | * and secondary guest are same or not, So we ignored all IP header include | |
282 | * other field like TOS,TTL,IP Checksum. we only need to compare | |
283 | * the ip payload here. | |
284 | */ | |
285 | ret = colo_packet_compare_common(ppkt, spkt, | |
286 | network_header_length + ETH_HLEN); | |
f4b61836 ZC |
287 | |
288 | if (ret) { | |
289 | trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size); | |
f4b61836 | 290 | trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size); |
1723a7f7 ZC |
291 | if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { |
292 | qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt", | |
293 | ppkt->size); | |
294 | qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt", | |
295 | spkt->size); | |
296 | } | |
f4b61836 ZC |
297 | } |
298 | ||
299 | return ret; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Called from the compare thread on the primary | |
304 | * for compare icmp packet | |
305 | */ | |
306 | static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt) | |
307 | { | |
6efeb328 ZC |
308 | int network_header_length = ppkt->ip->ip_hl * 4; |
309 | ||
f4b61836 | 310 | trace_colo_compare_main("compare icmp"); |
f4b61836 | 311 | |
6efeb328 ZC |
312 | /* |
313 | * Because of ppkt and spkt are both in the same connection, | |
314 | * The ppkt's src ip, dst ip, src port, dst port, ip_proto all are | |
315 | * same with spkt. In addition, IP header's Identification is a random | |
316 | * field, we can handle it in IP fragmentation function later. | |
317 | * COLO just concern the response net packet payload from primary guest | |
318 | * and secondary guest are same or not, So we ignored all IP header include | |
319 | * other field like TOS,TTL,IP Checksum. we only need to compare | |
320 | * the ip payload here. | |
321 | */ | |
322 | if (colo_packet_compare_common(ppkt, spkt, | |
323 | network_header_length + ETH_HLEN)) { | |
f4b61836 ZC |
324 | trace_colo_compare_icmp_miscompare("primary pkt size", |
325 | ppkt->size); | |
f4b61836 ZC |
326 | trace_colo_compare_icmp_miscompare("Secondary pkt size", |
327 | spkt->size); | |
1723a7f7 ZC |
328 | if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { |
329 | qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt", | |
330 | ppkt->size); | |
331 | qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt", | |
332 | spkt->size); | |
333 | } | |
f4b61836 ZC |
334 | return -1; |
335 | } else { | |
336 | return 0; | |
337 | } | |
338 | } | |
339 | ||
340 | /* | |
341 | * Called from the compare thread on the primary | |
342 | * for compare other packet | |
343 | */ | |
344 | static int colo_packet_compare_other(Packet *spkt, Packet *ppkt) | |
345 | { | |
346 | trace_colo_compare_main("compare other"); | |
e630b2bf ZC |
347 | if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { |
348 | char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; | |
349 | ||
350 | strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); | |
351 | strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst)); | |
352 | strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src)); | |
353 | strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst)); | |
354 | ||
355 | trace_colo_compare_ip_info(ppkt->size, pri_ip_src, | |
356 | pri_ip_dst, spkt->size, | |
357 | sec_ip_src, sec_ip_dst); | |
358 | } | |
359 | ||
6efeb328 | 360 | return colo_packet_compare_common(ppkt, spkt, 0); |
0682e15b ZC |
361 | } |
362 | ||
363 | static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time) | |
364 | { | |
365 | int64_t now = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
366 | ||
367 | if ((now - pkt->creation_ms) > (*check_time)) { | |
368 | trace_colo_old_packet_check_found(pkt->creation_ms); | |
369 | return 0; | |
370 | } else { | |
371 | return 1; | |
372 | } | |
373 | } | |
374 | ||
375 | static void colo_old_packet_check_one_conn(void *opaque, | |
376 | void *user_data) | |
377 | { | |
378 | Connection *conn = opaque; | |
379 | GList *result = NULL; | |
380 | int64_t check_time = REGULAR_PACKET_CHECK_MS; | |
381 | ||
382 | result = g_queue_find_custom(&conn->primary_list, | |
383 | &check_time, | |
384 | (GCompareFunc)colo_old_packet_check_one); | |
385 | ||
386 | if (result) { | |
387 | /* do checkpoint will flush old packet */ | |
388 | /* TODO: colo_notify_checkpoint();*/ | |
389 | } | |
390 | } | |
391 | ||
392 | /* | |
393 | * Look for old packets that the secondary hasn't matched, | |
394 | * if we have some then we have to checkpoint to wake | |
395 | * the secondary up. | |
396 | */ | |
397 | static void colo_old_packet_check(void *opaque) | |
398 | { | |
399 | CompareState *s = opaque; | |
400 | ||
401 | g_queue_foreach(&s->conn_list, colo_old_packet_check_one_conn, NULL); | |
402 | } | |
403 | ||
404 | /* | |
405 | * Called from the compare thread on the primary | |
406 | * for compare connection | |
407 | */ | |
408 | static void colo_compare_connection(void *opaque, void *user_data) | |
409 | { | |
410 | CompareState *s = user_data; | |
411 | Connection *conn = opaque; | |
412 | Packet *pkt = NULL; | |
413 | GList *result = NULL; | |
414 | int ret; | |
415 | ||
416 | while (!g_queue_is_empty(&conn->primary_list) && | |
417 | !g_queue_is_empty(&conn->secondary_list)) { | |
0682e15b | 418 | pkt = g_queue_pop_tail(&conn->primary_list); |
f4b61836 ZC |
419 | switch (conn->ip_proto) { |
420 | case IPPROTO_TCP: | |
421 | result = g_queue_find_custom(&conn->secondary_list, | |
422 | pkt, (GCompareFunc)colo_packet_compare_tcp); | |
423 | break; | |
424 | case IPPROTO_UDP: | |
425 | result = g_queue_find_custom(&conn->secondary_list, | |
426 | pkt, (GCompareFunc)colo_packet_compare_udp); | |
427 | break; | |
428 | case IPPROTO_ICMP: | |
429 | result = g_queue_find_custom(&conn->secondary_list, | |
430 | pkt, (GCompareFunc)colo_packet_compare_icmp); | |
431 | break; | |
432 | default: | |
433 | result = g_queue_find_custom(&conn->secondary_list, | |
434 | pkt, (GCompareFunc)colo_packet_compare_other); | |
435 | break; | |
436 | } | |
0682e15b ZC |
437 | |
438 | if (result) { | |
5345fdb4 | 439 | ret = compare_chr_send(&s->chr_out, pkt->data, pkt->size); |
0682e15b ZC |
440 | if (ret < 0) { |
441 | error_report("colo_send_primary_packet failed"); | |
442 | } | |
443 | trace_colo_compare_main("packet same and release packet"); | |
444 | g_queue_remove(&conn->secondary_list, result->data); | |
445 | packet_destroy(pkt, NULL); | |
446 | } else { | |
447 | /* | |
448 | * If one packet arrive late, the secondary_list or | |
449 | * primary_list will be empty, so we can't compare it | |
450 | * until next comparison. | |
451 | */ | |
452 | trace_colo_compare_main("packet different"); | |
0682e15b | 453 | g_queue_push_tail(&conn->primary_list, pkt); |
0682e15b ZC |
454 | /* TODO: colo_notify_checkpoint();*/ |
455 | break; | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
5345fdb4 | 460 | static int compare_chr_send(CharBackend *out, |
59509ec1 ZC |
461 | const uint8_t *buf, |
462 | uint32_t size) | |
463 | { | |
464 | int ret = 0; | |
465 | uint32_t len = htonl(size); | |
466 | ||
467 | if (!size) { | |
468 | return 0; | |
469 | } | |
470 | ||
471 | ret = qemu_chr_fe_write_all(out, (uint8_t *)&len, sizeof(len)); | |
472 | if (ret != sizeof(len)) { | |
473 | goto err; | |
474 | } | |
475 | ||
476 | ret = qemu_chr_fe_write_all(out, (uint8_t *)buf, size); | |
477 | if (ret != size) { | |
478 | goto err; | |
479 | } | |
480 | ||
481 | return 0; | |
482 | ||
483 | err: | |
484 | return ret < 0 ? ret : -EIO; | |
485 | } | |
486 | ||
0682e15b ZC |
487 | static int compare_chr_can_read(void *opaque) |
488 | { | |
489 | return COMPARE_READ_LEN_MAX; | |
490 | } | |
491 | ||
492 | /* | |
493 | * Called from the main thread on the primary for packets | |
494 | * arriving over the socket from the primary. | |
495 | */ | |
496 | static void compare_pri_chr_in(void *opaque, const uint8_t *buf, int size) | |
497 | { | |
498 | CompareState *s = COLO_COMPARE(opaque); | |
499 | int ret; | |
500 | ||
501 | ret = net_fill_rstate(&s->pri_rs, buf, size); | |
502 | if (ret == -1) { | |
39ab61c6 MAL |
503 | qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, |
504 | NULL, NULL, true); | |
0682e15b ZC |
505 | error_report("colo-compare primary_in error"); |
506 | } | |
507 | } | |
508 | ||
509 | /* | |
510 | * Called from the main thread on the primary for packets | |
511 | * arriving over the socket from the secondary. | |
512 | */ | |
513 | static void compare_sec_chr_in(void *opaque, const uint8_t *buf, int size) | |
514 | { | |
515 | CompareState *s = COLO_COMPARE(opaque); | |
516 | int ret; | |
517 | ||
518 | ret = net_fill_rstate(&s->sec_rs, buf, size); | |
519 | if (ret == -1) { | |
39ab61c6 MAL |
520 | qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, |
521 | NULL, NULL, true); | |
0682e15b ZC |
522 | error_report("colo-compare secondary_in error"); |
523 | } | |
524 | } | |
525 | ||
66d2a242 HZ |
526 | /* |
527 | * Check old packet regularly so it can watch for any packets | |
528 | * that the secondary hasn't produced equivalents of. | |
529 | */ | |
530 | static gboolean check_old_packet_regular(void *opaque) | |
531 | { | |
532 | CompareState *s = opaque; | |
533 | ||
534 | /* if have old packet we will notify checkpoint */ | |
535 | colo_old_packet_check(s); | |
536 | ||
537 | return TRUE; | |
538 | } | |
539 | ||
0682e15b ZC |
540 | static void *colo_compare_thread(void *opaque) |
541 | { | |
0682e15b | 542 | CompareState *s = opaque; |
66d2a242 | 543 | GSource *timeout_source; |
0682e15b | 544 | |
b43decb0 | 545 | s->worker_context = g_main_context_new(); |
0682e15b | 546 | |
5345fdb4 | 547 | qemu_chr_fe_set_handlers(&s->chr_pri_in, compare_chr_can_read, |
b43decb0 | 548 | compare_pri_chr_in, NULL, s, s->worker_context, true); |
5345fdb4 | 549 | qemu_chr_fe_set_handlers(&s->chr_sec_in, compare_chr_can_read, |
b43decb0 | 550 | compare_sec_chr_in, NULL, s, s->worker_context, true); |
0682e15b | 551 | |
b43decb0 | 552 | s->compare_loop = g_main_loop_new(s->worker_context, FALSE); |
0682e15b | 553 | |
66d2a242 HZ |
554 | /* To kick any packets that the secondary doesn't match */ |
555 | timeout_source = g_timeout_source_new(REGULAR_PACKET_CHECK_MS); | |
556 | g_source_set_callback(timeout_source, | |
557 | (GSourceFunc)check_old_packet_regular, s, NULL); | |
b43decb0 | 558 | g_source_attach(timeout_source, s->worker_context); |
66d2a242 | 559 | |
dfd917a9 | 560 | g_main_loop_run(s->compare_loop); |
0682e15b | 561 | |
66d2a242 | 562 | g_source_unref(timeout_source); |
dfd917a9 | 563 | g_main_loop_unref(s->compare_loop); |
b43decb0 | 564 | g_main_context_unref(s->worker_context); |
0682e15b ZC |
565 | return NULL; |
566 | } | |
567 | ||
7dce4e6f ZC |
568 | static char *compare_get_pri_indev(Object *obj, Error **errp) |
569 | { | |
570 | CompareState *s = COLO_COMPARE(obj); | |
571 | ||
572 | return g_strdup(s->pri_indev); | |
573 | } | |
574 | ||
575 | static void compare_set_pri_indev(Object *obj, const char *value, Error **errp) | |
576 | { | |
577 | CompareState *s = COLO_COMPARE(obj); | |
578 | ||
579 | g_free(s->pri_indev); | |
580 | s->pri_indev = g_strdup(value); | |
581 | } | |
582 | ||
583 | static char *compare_get_sec_indev(Object *obj, Error **errp) | |
584 | { | |
585 | CompareState *s = COLO_COMPARE(obj); | |
586 | ||
587 | return g_strdup(s->sec_indev); | |
588 | } | |
589 | ||
590 | static void compare_set_sec_indev(Object *obj, const char *value, Error **errp) | |
591 | { | |
592 | CompareState *s = COLO_COMPARE(obj); | |
593 | ||
594 | g_free(s->sec_indev); | |
595 | s->sec_indev = g_strdup(value); | |
596 | } | |
597 | ||
598 | static char *compare_get_outdev(Object *obj, Error **errp) | |
599 | { | |
600 | CompareState *s = COLO_COMPARE(obj); | |
601 | ||
602 | return g_strdup(s->outdev); | |
603 | } | |
604 | ||
605 | static void compare_set_outdev(Object *obj, const char *value, Error **errp) | |
606 | { | |
607 | CompareState *s = COLO_COMPARE(obj); | |
608 | ||
609 | g_free(s->outdev); | |
610 | s->outdev = g_strdup(value); | |
611 | } | |
612 | ||
613 | static void compare_pri_rs_finalize(SocketReadState *pri_rs) | |
614 | { | |
59509ec1 ZC |
615 | CompareState *s = container_of(pri_rs, CompareState, pri_rs); |
616 | ||
617 | if (packet_enqueue(s, PRIMARY_IN)) { | |
618 | trace_colo_compare_main("primary: unsupported packet in"); | |
5345fdb4 | 619 | compare_chr_send(&s->chr_out, pri_rs->buf, pri_rs->packet_len); |
0682e15b ZC |
620 | } else { |
621 | /* compare connection */ | |
622 | g_queue_foreach(&s->conn_list, colo_compare_connection, s); | |
59509ec1 | 623 | } |
7dce4e6f ZC |
624 | } |
625 | ||
626 | static void compare_sec_rs_finalize(SocketReadState *sec_rs) | |
627 | { | |
59509ec1 ZC |
628 | CompareState *s = container_of(sec_rs, CompareState, sec_rs); |
629 | ||
630 | if (packet_enqueue(s, SECONDARY_IN)) { | |
631 | trace_colo_compare_main("secondary: unsupported packet in"); | |
0682e15b ZC |
632 | } else { |
633 | /* compare connection */ | |
634 | g_queue_foreach(&s->conn_list, colo_compare_connection, s); | |
59509ec1 | 635 | } |
7dce4e6f ZC |
636 | } |
637 | ||
7dce4e6f ZC |
638 | |
639 | /* | |
640 | * Return 0 is success. | |
641 | * Return 1 is failed. | |
642 | */ | |
0ec7b3e7 | 643 | static int find_and_check_chardev(Chardev **chr, |
7dce4e6f ZC |
644 | char *chr_name, |
645 | Error **errp) | |
646 | { | |
7dce4e6f ZC |
647 | *chr = qemu_chr_find(chr_name); |
648 | if (*chr == NULL) { | |
649 | error_setg(errp, "Device '%s' not found", | |
650 | chr_name); | |
651 | return 1; | |
652 | } | |
653 | ||
0a73336d DB |
654 | if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) { |
655 | error_setg(errp, "chardev \"%s\" is not reconnectable", | |
7dce4e6f ZC |
656 | chr_name); |
657 | return 1; | |
658 | } | |
fbf3cc3a | 659 | |
7dce4e6f ZC |
660 | return 0; |
661 | } | |
662 | ||
663 | /* | |
664 | * Called from the main thread on the primary | |
665 | * to setup colo-compare. | |
666 | */ | |
667 | static void colo_compare_complete(UserCreatable *uc, Error **errp) | |
668 | { | |
669 | CompareState *s = COLO_COMPARE(uc); | |
0ec7b3e7 | 670 | Chardev *chr; |
0682e15b ZC |
671 | char thread_name[64]; |
672 | static int compare_id; | |
7dce4e6f ZC |
673 | |
674 | if (!s->pri_indev || !s->sec_indev || !s->outdev) { | |
675 | error_setg(errp, "colo compare needs 'primary_in' ," | |
676 | "'secondary_in','outdev' property set"); | |
677 | return; | |
678 | } else if (!strcmp(s->pri_indev, s->outdev) || | |
679 | !strcmp(s->sec_indev, s->outdev) || | |
680 | !strcmp(s->pri_indev, s->sec_indev)) { | |
681 | error_setg(errp, "'indev' and 'outdev' could not be same " | |
682 | "for compare module"); | |
683 | return; | |
684 | } | |
685 | ||
5345fdb4 MAL |
686 | if (find_and_check_chardev(&chr, s->pri_indev, errp) || |
687 | !qemu_chr_fe_init(&s->chr_pri_in, chr, errp)) { | |
7dce4e6f ZC |
688 | return; |
689 | } | |
690 | ||
5345fdb4 MAL |
691 | if (find_and_check_chardev(&chr, s->sec_indev, errp) || |
692 | !qemu_chr_fe_init(&s->chr_sec_in, chr, errp)) { | |
7dce4e6f ZC |
693 | return; |
694 | } | |
695 | ||
5345fdb4 MAL |
696 | if (find_and_check_chardev(&chr, s->outdev, errp) || |
697 | !qemu_chr_fe_init(&s->chr_out, chr, errp)) { | |
7dce4e6f ZC |
698 | return; |
699 | } | |
700 | ||
7dce4e6f ZC |
701 | net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize); |
702 | net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize); | |
703 | ||
b6540d40 ZC |
704 | g_queue_init(&s->conn_list); |
705 | ||
706 | s->connection_track_table = g_hash_table_new_full(connection_key_hash, | |
707 | connection_key_equal, | |
708 | g_free, | |
709 | connection_destroy); | |
59509ec1 | 710 | |
0682e15b ZC |
711 | sprintf(thread_name, "colo-compare %d", compare_id); |
712 | qemu_thread_create(&s->thread, thread_name, | |
713 | colo_compare_thread, s, | |
714 | QEMU_THREAD_JOINABLE); | |
715 | compare_id++; | |
716 | ||
7dce4e6f ZC |
717 | return; |
718 | } | |
719 | ||
dfd917a9 HZ |
720 | static void colo_flush_packets(void *opaque, void *user_data) |
721 | { | |
722 | CompareState *s = user_data; | |
723 | Connection *conn = opaque; | |
724 | Packet *pkt = NULL; | |
725 | ||
726 | while (!g_queue_is_empty(&conn->primary_list)) { | |
727 | pkt = g_queue_pop_head(&conn->primary_list); | |
728 | compare_chr_send(&s->chr_out, pkt->data, pkt->size); | |
729 | packet_destroy(pkt, NULL); | |
730 | } | |
731 | while (!g_queue_is_empty(&conn->secondary_list)) { | |
732 | pkt = g_queue_pop_head(&conn->secondary_list); | |
733 | packet_destroy(pkt, NULL); | |
734 | } | |
735 | } | |
736 | ||
7dce4e6f ZC |
737 | static void colo_compare_class_init(ObjectClass *oc, void *data) |
738 | { | |
739 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); | |
740 | ||
741 | ucc->complete = colo_compare_complete; | |
742 | } | |
743 | ||
744 | static void colo_compare_init(Object *obj) | |
745 | { | |
746 | object_property_add_str(obj, "primary_in", | |
747 | compare_get_pri_indev, compare_set_pri_indev, | |
748 | NULL); | |
749 | object_property_add_str(obj, "secondary_in", | |
750 | compare_get_sec_indev, compare_set_sec_indev, | |
751 | NULL); | |
752 | object_property_add_str(obj, "outdev", | |
753 | compare_get_outdev, compare_set_outdev, | |
754 | NULL); | |
755 | } | |
756 | ||
757 | static void colo_compare_finalize(Object *obj) | |
758 | { | |
759 | CompareState *s = COLO_COMPARE(obj); | |
760 | ||
b43decb0 HZ |
761 | qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, NULL, |
762 | s->worker_context, true); | |
763 | qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, NULL, | |
764 | s->worker_context, true); | |
c39860e6 | 765 | qemu_chr_fe_deinit(&s->chr_out); |
7dce4e6f | 766 | |
dfd917a9 HZ |
767 | g_main_loop_quit(s->compare_loop); |
768 | qemu_thread_join(&s->thread); | |
b6540d40 | 769 | |
dfd917a9 HZ |
770 | /* Release all unhandled packets after compare thead exited */ |
771 | g_queue_foreach(&s->conn_list, colo_flush_packets, s); | |
772 | ||
727c2d76 | 773 | g_queue_clear(&s->conn_list); |
0682e15b | 774 | |
dfd917a9 | 775 | g_hash_table_destroy(s->connection_track_table); |
7dce4e6f ZC |
776 | g_free(s->pri_indev); |
777 | g_free(s->sec_indev); | |
778 | g_free(s->outdev); | |
779 | } | |
780 | ||
781 | static const TypeInfo colo_compare_info = { | |
782 | .name = TYPE_COLO_COMPARE, | |
783 | .parent = TYPE_OBJECT, | |
784 | .instance_size = sizeof(CompareState), | |
785 | .instance_init = colo_compare_init, | |
786 | .instance_finalize = colo_compare_finalize, | |
787 | .class_size = sizeof(CompareClass), | |
788 | .class_init = colo_compare_class_init, | |
789 | .interfaces = (InterfaceInfo[]) { | |
790 | { TYPE_USER_CREATABLE }, | |
791 | { } | |
792 | } | |
793 | }; | |
794 | ||
795 | static void register_types(void) | |
796 | { | |
797 | type_register_static(&colo_compare_info); | |
798 | } | |
799 | ||
800 | type_init(register_types); |