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fe000966 DM |
1 | /* |
2 | Copyright (C) 2010 Proxmox Server Solutions GmbH | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU Affero General Public License as published by | |
6 | the Free Software Foundation, either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU Affero General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Affero General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | ||
17 | Author: Dietmar Maurer <dietmar@proxmox.com> | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | /* NOTE: we try to keep the CPG handle as long as possible, because | |
23 | * calling cpg_initialize/cpg_finalize multiple times from the | |
24 | * same process confuses corosync. | |
25 | * Note: CS_ERR_LIBRARY is returned when corosync died | |
26 | */ | |
27 | ||
28 | #ifdef HAVE_CONFIG_H | |
29 | #include <config.h> | |
30 | #endif /* HAVE_CONFIG_H */ | |
31 | ||
32 | #include <sys/types.h> | |
33 | #include <unistd.h> | |
34 | #include <string.h> | |
35 | #include <stdlib.h> | |
36 | ||
37 | #include <corosync/corotypes.h> | |
38 | #include <corosync/cpg.h> | |
39 | #include <glib.h> | |
40 | ||
41 | #include "cfs-utils.h" | |
42 | #include "dfsm.h" | |
43 | ||
44 | static cpg_callbacks_t cpg_callbacks; | |
45 | ||
46 | typedef enum { | |
47 | DFSM_MODE_START = 0, | |
48 | DFSM_MODE_START_SYNC = 1, | |
49 | DFSM_MODE_SYNCED = 2, | |
50 | DFSM_MODE_UPDATE = 3, | |
51 | ||
52 | /* values >= 128 indicates abnormal/error conditions */ | |
53 | DFSM_ERROR_MODE_START = 128, | |
54 | DFSM_MODE_LEAVE = 253, | |
55 | DFSM_MODE_VERSION_ERROR = 254, | |
56 | DFSM_MODE_ERROR = 255, | |
57 | } dfsm_mode_t; | |
58 | ||
59 | typedef enum { | |
60 | DFSM_MESSAGE_NORMAL = 0, | |
61 | DFSM_MESSAGE_SYNC_START = 1, | |
62 | DFSM_MESSAGE_STATE = 2, | |
63 | DFSM_MESSAGE_UPDATE = 3, | |
64 | DFSM_MESSAGE_UPDATE_COMPLETE = 4, | |
65 | DFSM_MESSAGE_VERIFY_REQUEST = 5, | |
66 | DFSM_MESSAGE_VERIFY = 6, | |
67 | } dfsm_message_t; | |
68 | ||
69 | #define DFSM_VALID_STATE_MESSAGE(mt) (mt >= DFSM_MESSAGE_SYNC_START && mt <= DFSM_MESSAGE_VERIFY) | |
70 | ||
71 | typedef struct { | |
72 | uint16_t type; | |
73 | uint16_t subtype; | |
74 | uint32_t protocol_version; | |
75 | uint32_t time; | |
76 | uint32_t reserved; | |
77 | } dfsm_message_header_t; | |
78 | ||
79 | typedef struct { | |
80 | uint32_t epoch; // per process (not globally unique) | |
81 | uint32_t time; | |
82 | uint32_t nodeid; | |
83 | uint32_t pid; | |
84 | } dfsm_sync_epoch_t; | |
85 | ||
86 | typedef struct { | |
87 | dfsm_message_header_t base; | |
88 | dfsm_sync_epoch_t epoch; | |
89 | } dfsm_message_state_header_t; | |
90 | ||
91 | typedef struct { | |
92 | dfsm_message_header_t base; | |
93 | uint64_t count; | |
94 | } dfsm_message_normal_header_t; | |
95 | ||
96 | typedef struct { | |
97 | uint32_t nodeid; | |
98 | uint32_t pid; | |
99 | uint64_t msg_count; | |
100 | void *msg; | |
101 | int msg_len; // fixme: unsigned? | |
102 | } dfsm_queued_message_t; | |
103 | ||
104 | struct dfsm { | |
6392e29a | 105 | const char *log_domain; |
fe000966 DM |
106 | cpg_callbacks_t *cpg_callbacks; |
107 | dfsm_callbacks_t *dfsm_callbacks; | |
108 | cpg_handle_t cpg_handle; | |
109 | struct cpg_name cpg_group_name; | |
110 | uint32_t nodeid; | |
111 | uint32_t pid; | |
112 | int we_are_member; | |
113 | ||
114 | guint32 protocol_version; | |
115 | gpointer data; | |
116 | ||
117 | gboolean joined; | |
118 | ||
119 | /* mode is protected with mode_mutex */ | |
120 | GMutex *mode_mutex; | |
121 | dfsm_mode_t mode; | |
122 | ||
123 | GHashTable *members; /* contains dfsm_node_info_t pointers */ | |
124 | dfsm_sync_info_t *sync_info; | |
125 | uint32_t local_epoch_counter; | |
126 | dfsm_sync_epoch_t sync_epoch; | |
127 | uint32_t lowest_nodeid; | |
128 | GSequence *msg_queue; | |
129 | GList *sync_queue; | |
130 | ||
131 | /* synchrounous message transmission, protected with sync_mutex */ | |
132 | GMutex *sync_mutex; | |
133 | GCond *sync_cond; | |
134 | GHashTable *results; | |
135 | uint64_t msgcount; | |
136 | uint64_t msgcount_rcvd; | |
137 | ||
138 | /* state verification */ | |
139 | guchar csum[32]; | |
140 | dfsm_sync_epoch_t csum_epoch; | |
141 | uint64_t csum_id; | |
142 | uint64_t csum_counter; | |
143 | }; | |
144 | ||
145 | static gboolean dfsm_deliver_queue(dfsm_t *dfsm); | |
146 | static gboolean dfsm_deliver_sync_queue(dfsm_t *dfsm); | |
147 | ||
148 | gboolean | |
149 | dfsm_nodeid_is_local( | |
150 | dfsm_t *dfsm, | |
151 | uint32_t nodeid, | |
152 | uint32_t pid) | |
153 | { | |
154 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
155 | ||
156 | return (nodeid == dfsm->nodeid && pid == dfsm->pid); | |
157 | } | |
158 | ||
159 | ||
160 | static void | |
161 | dfsm_send_sync_message_abort(dfsm_t *dfsm) | |
162 | { | |
163 | g_return_if_fail(dfsm != NULL); | |
164 | g_return_if_fail(dfsm->sync_mutex != NULL); | |
165 | g_return_if_fail(dfsm->sync_cond != NULL); | |
166 | ||
167 | g_mutex_lock (dfsm->sync_mutex); | |
168 | dfsm->msgcount_rcvd = dfsm->msgcount; | |
169 | g_cond_broadcast (dfsm->sync_cond); | |
170 | g_mutex_unlock (dfsm->sync_mutex); | |
171 | } | |
172 | ||
173 | static void | |
174 | dfsm_record_local_result( | |
175 | dfsm_t *dfsm, | |
176 | uint64_t msg_count, | |
177 | int msg_result, | |
178 | gboolean processed) | |
179 | { | |
180 | g_return_if_fail(dfsm != NULL); | |
181 | g_return_if_fail(dfsm->sync_mutex != NULL); | |
182 | g_return_if_fail(dfsm->sync_cond != NULL); | |
183 | g_return_if_fail(dfsm->results != NULL); | |
184 | ||
185 | g_mutex_lock (dfsm->sync_mutex); | |
186 | dfsm_result_t *rp = (dfsm_result_t *)g_hash_table_lookup(dfsm->results, &msg_count); | |
187 | if (rp) { | |
188 | rp->result = msg_result; | |
189 | rp->processed = processed; | |
190 | } | |
191 | dfsm->msgcount_rcvd = msg_count; | |
192 | g_cond_broadcast (dfsm->sync_cond); | |
193 | g_mutex_unlock (dfsm->sync_mutex); | |
194 | } | |
195 | ||
196 | static cpg_error_t | |
197 | dfsm_send_message_full( | |
198 | dfsm_t *dfsm, | |
199 | struct iovec *iov, | |
200 | unsigned int len, | |
201 | int retry) | |
202 | { | |
203 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
204 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
205 | ||
206 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
207 | cpg_error_t result; | |
208 | int retries = 0; | |
209 | loop: | |
210 | result = cpg_mcast_joined(dfsm->cpg_handle, CPG_TYPE_AGREED, iov, len); | |
211 | if (retry && result == CPG_ERR_TRY_AGAIN) { | |
212 | nanosleep(&tvreq, NULL); | |
213 | ++retries; | |
214 | if ((retries % 10) == 0) | |
215 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retry %d", retries); | |
216 | if (retries < 100) | |
217 | goto loop; | |
218 | } | |
219 | ||
220 | if (retries) | |
221 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retried %d times", retries); | |
222 | ||
223 | if (result != CS_OK && | |
224 | (!retry || result != CPG_ERR_TRY_AGAIN)) | |
225 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); | |
226 | ||
227 | return result; | |
228 | } | |
229 | ||
230 | static cpg_error_t | |
231 | dfsm_send_state_message_full( | |
232 | dfsm_t *dfsm, | |
233 | uint16_t type, | |
234 | struct iovec *iov, | |
235 | unsigned int len) | |
236 | { | |
237 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
238 | g_return_val_if_fail(DFSM_VALID_STATE_MESSAGE(type), CS_ERR_INVALID_PARAM); | |
239 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
240 | ||
241 | dfsm_message_state_header_t header; | |
242 | header.base.type = type; | |
243 | header.base.subtype = 0; | |
244 | header.base.protocol_version = dfsm->protocol_version; | |
245 | header.base.time = time(NULL); | |
246 | header.base.reserved = 0; | |
247 | ||
248 | header.epoch = dfsm->sync_epoch; | |
249 | ||
250 | struct iovec real_iov[len + 1]; | |
251 | ||
252 | real_iov[0].iov_base = (char *)&header; | |
253 | real_iov[0].iov_len = sizeof(header); | |
254 | ||
255 | for (int i = 0; i < len; i++) | |
256 | real_iov[i + 1] = iov[i]; | |
257 | ||
258 | return dfsm_send_message_full(dfsm, real_iov, len + 1, 1); | |
259 | } | |
260 | ||
261 | cpg_error_t | |
262 | dfsm_send_update( | |
263 | dfsm_t *dfsm, | |
264 | struct iovec *iov, | |
265 | unsigned int len) | |
266 | { | |
267 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE, iov, len); | |
268 | } | |
269 | ||
270 | cpg_error_t | |
271 | dfsm_send_update_complete(dfsm_t *dfsm) | |
272 | { | |
273 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE_COMPLETE, NULL, 0); | |
274 | } | |
275 | ||
276 | ||
277 | cpg_error_t | |
278 | dfsm_send_message( | |
279 | dfsm_t *dfsm, | |
280 | uint16_t msgtype, | |
281 | struct iovec *iov, | |
282 | int len) | |
283 | { | |
284 | return dfsm_send_message_sync(dfsm, msgtype, iov, len, NULL); | |
285 | } | |
286 | ||
287 | cpg_error_t | |
288 | dfsm_send_message_sync( | |
289 | dfsm_t *dfsm, | |
290 | uint16_t msgtype, | |
291 | struct iovec *iov, | |
292 | int len, | |
293 | dfsm_result_t *rp) | |
294 | { | |
295 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
296 | g_return_val_if_fail(dfsm->sync_mutex != NULL, CS_ERR_INVALID_PARAM); | |
297 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
298 | ||
299 | g_mutex_lock (dfsm->sync_mutex); | |
300 | /* note: hold lock until message is sent - to guarantee ordering */ | |
301 | uint64_t msgcount = ++dfsm->msgcount; | |
302 | if (rp) { | |
303 | rp->msgcount = msgcount; | |
304 | rp->processed = 0; | |
305 | g_hash_table_replace(dfsm->results, &rp->msgcount, rp); | |
306 | } | |
307 | ||
308 | dfsm_message_normal_header_t header; | |
309 | header.base.type = DFSM_MESSAGE_NORMAL; | |
310 | header.base.subtype = msgtype; | |
311 | header.base.protocol_version = dfsm->protocol_version; | |
312 | header.base.time = time(NULL); | |
313 | header.base.reserved = 0; | |
314 | header.count = msgcount; | |
315 | ||
316 | struct iovec real_iov[len + 1]; | |
317 | ||
318 | real_iov[0].iov_base = (char *)&header; | |
319 | real_iov[0].iov_len = sizeof(header); | |
320 | ||
321 | for (int i = 0; i < len; i++) | |
322 | real_iov[i + 1] = iov[i]; | |
323 | ||
324 | cpg_error_t result = dfsm_send_message_full(dfsm, real_iov, len + 1, 1); | |
325 | ||
326 | g_mutex_unlock (dfsm->sync_mutex); | |
327 | ||
328 | if (result != CS_OK) { | |
329 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); | |
330 | ||
331 | if (rp) { | |
332 | g_mutex_lock (dfsm->sync_mutex); | |
333 | g_hash_table_remove(dfsm->results, &rp->msgcount); | |
334 | g_mutex_unlock (dfsm->sync_mutex); | |
335 | } | |
336 | return result; | |
337 | } | |
338 | ||
339 | if (rp) { | |
340 | g_mutex_lock (dfsm->sync_mutex); | |
341 | ||
342 | while (dfsm->msgcount_rcvd < msgcount) | |
343 | g_cond_wait (dfsm->sync_cond, dfsm->sync_mutex); | |
344 | ||
345 | ||
346 | g_hash_table_remove(dfsm->results, &rp->msgcount); | |
347 | ||
348 | g_mutex_unlock (dfsm->sync_mutex); | |
349 | ||
350 | return rp->processed ? CS_OK : CS_ERR_FAILED_OPERATION; | |
351 | } | |
352 | ||
353 | return CS_OK; | |
354 | } | |
355 | ||
356 | static gboolean | |
357 | dfsm_send_checksum(dfsm_t *dfsm) | |
358 | { | |
359 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
360 | ||
361 | int len = 2; | |
362 | struct iovec iov[len]; | |
363 | ||
364 | iov[0].iov_base = (char *)&dfsm->csum_id; | |
365 | iov[0].iov_len = sizeof(dfsm->csum_id); | |
366 | iov[1].iov_base = dfsm->csum; | |
367 | iov[1].iov_len = sizeof(dfsm->csum); | |
368 | ||
369 | gboolean res = (dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_VERIFY, iov, len) == CS_OK); | |
370 | ||
371 | return res; | |
372 | } | |
373 | ||
374 | static void | |
375 | dfsm_free_queue_entry(gpointer data) | |
376 | { | |
377 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)data; | |
378 | g_free (qm->msg); | |
379 | g_free (qm); | |
380 | } | |
381 | ||
382 | static void | |
383 | dfsm_free_message_queue(dfsm_t *dfsm) | |
384 | { | |
385 | g_return_if_fail(dfsm != NULL); | |
386 | g_return_if_fail(dfsm->msg_queue != NULL); | |
387 | ||
388 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
389 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
390 | while (iter != end) { | |
391 | GSequenceIter *cur = iter; | |
392 | iter = g_sequence_iter_next(iter); | |
393 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
394 | g_sequence_get(cur); | |
395 | dfsm_free_queue_entry(qm); | |
396 | g_sequence_remove(cur); | |
397 | } | |
398 | } | |
399 | ||
400 | static void | |
401 | dfsm_free_sync_queue(dfsm_t *dfsm) | |
402 | { | |
403 | g_return_if_fail(dfsm != NULL); | |
404 | ||
405 | GList *iter = dfsm->sync_queue; | |
406 | while (iter) { | |
407 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
408 | iter = g_list_next(iter); | |
409 | dfsm_free_queue_entry(qm); | |
410 | } | |
411 | ||
412 | g_list_free(dfsm->sync_queue); | |
413 | dfsm->sync_queue = NULL; | |
414 | } | |
415 | ||
416 | static gint | |
417 | message_queue_sort_fn( | |
418 | gconstpointer a, | |
419 | gconstpointer b, | |
420 | gpointer user_data) | |
421 | { | |
422 | return ((dfsm_queued_message_t *)a)->msg_count - | |
423 | ((dfsm_queued_message_t *)b)->msg_count; | |
424 | } | |
425 | ||
426 | static dfsm_node_info_t * | |
427 | dfsm_node_info_lookup( | |
428 | dfsm_t *dfsm, | |
429 | uint32_t nodeid, | |
430 | uint32_t pid) | |
431 | { | |
432 | g_return_val_if_fail(dfsm != NULL, NULL); | |
433 | g_return_val_if_fail(dfsm->members != NULL, NULL); | |
434 | ||
435 | dfsm_node_info_t info = { .nodeid = nodeid, .pid = pid }; | |
436 | ||
437 | return (dfsm_node_info_t *)g_hash_table_lookup(dfsm->members, &info); | |
438 | } | |
439 | ||
440 | static dfsm_queued_message_t * | |
441 | dfsm_queue_add_message( | |
442 | dfsm_t *dfsm, | |
443 | uint32_t nodeid, | |
444 | uint32_t pid, | |
445 | uint64_t msg_count, | |
446 | const void *msg, | |
447 | size_t msg_len) | |
448 | { | |
449 | g_return_val_if_fail(dfsm != NULL, NULL); | |
450 | g_return_val_if_fail(msg != NULL, NULL); | |
451 | g_return_val_if_fail(msg_len != 0, NULL); | |
452 | ||
453 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, nodeid, pid); | |
454 | if (!ni) { | |
455 | cfs_dom_critical(dfsm->log_domain, "dfsm_node_info_lookup failed"); | |
456 | return NULL; | |
457 | } | |
458 | ||
459 | dfsm_queued_message_t *qm = g_new0(dfsm_queued_message_t, 1); | |
460 | g_return_val_if_fail(qm != NULL, NULL); | |
461 | ||
462 | qm->nodeid = nodeid; | |
463 | qm->pid = pid; | |
464 | qm->msg = g_memdup (msg, msg_len); | |
465 | qm->msg_len = msg_len; | |
466 | qm->msg_count = msg_count; | |
467 | ||
468 | if (dfsm->mode == DFSM_MODE_UPDATE && ni->synced) { | |
469 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
470 | } else { | |
471 | /* NOTE: we only need to sort the queue because we resend all | |
472 | * queued messages sometimes. | |
473 | */ | |
474 | g_sequence_insert_sorted(dfsm->msg_queue, qm, message_queue_sort_fn, NULL); | |
475 | } | |
476 | ||
477 | return qm; | |
478 | } | |
479 | ||
480 | static guint | |
481 | dfsm_sync_info_hash(gconstpointer key) | |
482 | { | |
483 | dfsm_node_info_t *info = (dfsm_node_info_t *)key; | |
484 | ||
485 | return g_int_hash(&info->nodeid) + g_int_hash(&info->pid); | |
486 | } | |
487 | ||
488 | static gboolean | |
489 | dfsm_sync_info_equal( | |
490 | gconstpointer v1, | |
491 | gconstpointer v2) | |
492 | { | |
493 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
494 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
495 | ||
496 | if (info1->nodeid == info2->nodeid && | |
497 | info1->pid == info2->pid) | |
498 | return TRUE; | |
499 | ||
500 | return FALSE; | |
501 | } | |
502 | ||
503 | static int | |
504 | dfsm_sync_info_compare( | |
505 | gconstpointer v1, | |
506 | gconstpointer v2) | |
507 | { | |
508 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
509 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
510 | ||
511 | if (info1->nodeid != info2->nodeid) | |
512 | return info1->nodeid - info2->nodeid; | |
513 | ||
514 | return info1->pid - info2->pid; | |
515 | } | |
516 | ||
517 | static void | |
518 | dfsm_set_mode( | |
519 | dfsm_t *dfsm, | |
520 | dfsm_mode_t new_mode) | |
521 | { | |
522 | g_return_if_fail(dfsm != NULL); | |
523 | ||
524 | cfs_debug("dfsm_set_mode - set mode to %d", new_mode); | |
525 | ||
526 | int changed = 0; | |
527 | g_mutex_lock (dfsm->mode_mutex); | |
528 | if (dfsm->mode != new_mode) { | |
529 | if (new_mode < DFSM_ERROR_MODE_START || | |
530 | (dfsm->mode < DFSM_ERROR_MODE_START || new_mode >= dfsm->mode)) { | |
531 | dfsm->mode = new_mode; | |
532 | changed = 1; | |
533 | } | |
534 | } | |
535 | g_mutex_unlock (dfsm->mode_mutex); | |
536 | ||
537 | if (!changed) | |
538 | return; | |
539 | ||
540 | if (new_mode == DFSM_MODE_START) { | |
541 | cfs_dom_message(dfsm->log_domain, "start cluster connection"); | |
542 | } else if (new_mode == DFSM_MODE_START_SYNC) { | |
543 | cfs_dom_message(dfsm->log_domain, "starting data syncronisation"); | |
544 | } else if (new_mode == DFSM_MODE_SYNCED) { | |
545 | cfs_dom_message(dfsm->log_domain, "all data is up to date"); | |
546 | if (dfsm->dfsm_callbacks->dfsm_synced_fn) | |
547 | dfsm->dfsm_callbacks->dfsm_synced_fn(dfsm); | |
548 | } else if (new_mode == DFSM_MODE_UPDATE) { | |
549 | cfs_dom_message(dfsm->log_domain, "waiting for updates from leader"); | |
550 | } else if (new_mode == DFSM_MODE_LEAVE) { | |
551 | cfs_dom_critical(dfsm->log_domain, "leaving CPG group"); | |
552 | } else if (new_mode == DFSM_MODE_ERROR) { | |
553 | cfs_dom_critical(dfsm->log_domain, "serious internal error - stop cluster connection"); | |
554 | } else if (new_mode == DFSM_MODE_VERSION_ERROR) { | |
555 | cfs_dom_critical(dfsm->log_domain, "detected newer protocol - please update this node"); | |
556 | } | |
557 | } | |
558 | ||
559 | static dfsm_mode_t | |
560 | dfsm_get_mode(dfsm_t *dfsm) | |
561 | { | |
562 | g_return_val_if_fail(dfsm != NULL, DFSM_MODE_ERROR); | |
563 | ||
564 | g_mutex_lock (dfsm->mode_mutex); | |
565 | dfsm_mode_t mode = dfsm->mode; | |
566 | g_mutex_unlock (dfsm->mode_mutex); | |
567 | ||
568 | return mode; | |
569 | } | |
570 | ||
571 | gboolean | |
572 | dfsm_restartable(dfsm_t *dfsm) | |
573 | { | |
574 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
575 | ||
576 | return !(mode == DFSM_MODE_ERROR || | |
577 | mode == DFSM_MODE_VERSION_ERROR); | |
578 | } | |
579 | ||
580 | void | |
581 | dfsm_set_errormode(dfsm_t *dfsm) | |
582 | { | |
583 | dfsm_set_mode(dfsm, DFSM_MODE_ERROR); | |
584 | } | |
585 | ||
586 | static void | |
587 | dfsm_release_sync_resources( | |
588 | dfsm_t *dfsm, | |
589 | const struct cpg_address *member_list, | |
590 | size_t member_list_entries) | |
591 | { | |
592 | g_return_if_fail(dfsm != NULL); | |
593 | g_return_if_fail(dfsm->members != NULL); | |
594 | g_return_if_fail(!member_list_entries || member_list != NULL); | |
595 | ||
596 | cfs_debug("enter dfsm_release_sync_resources"); | |
597 | ||
598 | if (dfsm->sync_info) { | |
599 | ||
600 | if (dfsm->sync_info->data && dfsm->dfsm_callbacks->dfsm_cleanup_fn) { | |
601 | dfsm->dfsm_callbacks->dfsm_cleanup_fn(dfsm, dfsm->data, dfsm->sync_info); | |
602 | dfsm->sync_info->data = NULL; | |
603 | } | |
604 | ||
605 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
606 | if (dfsm->sync_info->nodes[i].state) { | |
607 | g_free(dfsm->sync_info->nodes[i].state); | |
608 | dfsm->sync_info->nodes[i].state = NULL; | |
609 | dfsm->sync_info->nodes[i].state_len = 0; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | if (member_list) { | |
615 | ||
616 | g_hash_table_remove_all(dfsm->members); | |
617 | ||
618 | if (dfsm->sync_info) | |
619 | g_free(dfsm->sync_info); | |
620 | ||
621 | int size = sizeof(dfsm_sync_info_t) + | |
622 | member_list_entries*sizeof(dfsm_sync_info_t); | |
623 | dfsm_sync_info_t *sync_info = dfsm->sync_info = g_malloc0(size); | |
624 | sync_info->node_count = member_list_entries; | |
625 | ||
626 | for (int i = 0; i < member_list_entries; i++) { | |
627 | sync_info->nodes[i].nodeid = member_list[i].nodeid; | |
628 | sync_info->nodes[i].pid = member_list[i].pid; | |
629 | } | |
630 | ||
631 | qsort(sync_info->nodes, member_list_entries, sizeof(dfsm_node_info_t), | |
632 | dfsm_sync_info_compare); | |
633 | ||
634 | for (int i = 0; i < member_list_entries; i++) { | |
635 | dfsm_node_info_t *info = &sync_info->nodes[i]; | |
636 | g_hash_table_insert(dfsm->members, info, info); | |
637 | if (info->nodeid == dfsm->nodeid && info->pid == dfsm->pid) | |
638 | sync_info->local = info; | |
639 | } | |
640 | } | |
641 | } | |
642 | ||
643 | static void | |
644 | dfsm_cpg_deliver_callback( | |
645 | cpg_handle_t handle, | |
646 | const struct cpg_name *group_name, | |
647 | uint32_t nodeid, | |
648 | uint32_t pid, | |
649 | void *msg, | |
650 | size_t msg_len) | |
651 | { | |
652 | cs_error_t result; | |
653 | ||
654 | dfsm_t *dfsm = NULL; | |
655 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
656 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
657 | cfs_critical("cpg_context_get error: %d (%p)", result, dfsm); | |
658 | return; /* we have no valid dfsm pointer, so we can just ignore this */ | |
659 | } | |
660 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
661 | ||
662 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
663 | ||
664 | if (mode >= DFSM_ERROR_MODE_START) { | |
665 | cfs_dom_debug(dfsm->log_domain, "error mode - ignoring message"); | |
666 | goto leave; | |
667 | } | |
668 | ||
669 | if (!dfsm->sync_info) { | |
670 | cfs_dom_critical(dfsm->log_domain, "no dfsm_sync_info - internal error"); | |
671 | goto leave; | |
672 | } | |
673 | ||
674 | if (msg_len < sizeof(dfsm_message_header_t)) { | |
675 | cfs_dom_critical(dfsm->log_domain, "received short message (%ld bytes)", msg_len); | |
676 | goto leave; | |
677 | } | |
678 | ||
679 | dfsm_message_header_t *base_header = (dfsm_message_header_t *)msg; | |
680 | ||
681 | if (base_header->protocol_version > dfsm->protocol_version) { | |
682 | cfs_dom_critical(dfsm->log_domain, "received message with protocol version %d", | |
683 | base_header->protocol_version); | |
684 | dfsm_set_mode(dfsm, DFSM_MODE_VERSION_ERROR); | |
685 | return; | |
686 | } else if (base_header->protocol_version < dfsm->protocol_version) { | |
687 | cfs_dom_message(dfsm->log_domain, "ignore message with wrong protocol version %d", | |
688 | base_header->protocol_version); | |
689 | return; | |
690 | } | |
691 | ||
692 | if (base_header->type == DFSM_MESSAGE_NORMAL) { | |
693 | ||
694 | dfsm_message_normal_header_t *header = (dfsm_message_normal_header_t *)msg; | |
695 | ||
696 | if (msg_len < sizeof(dfsm_message_normal_header_t)) { | |
697 | cfs_dom_critical(dfsm->log_domain, "received short message (type = %d, subtype = %d, %ld bytes)", | |
698 | base_header->type, base_header->subtype, msg_len); | |
699 | goto leave; | |
700 | } | |
701 | ||
702 | if (mode != DFSM_MODE_SYNCED) { | |
703 | cfs_dom_debug(dfsm->log_domain, "queue message %zu (subtype = %d, length = %ld)", | |
704 | header->count, base_header->subtype, msg_len); | |
705 | ||
706 | if (!dfsm_queue_add_message(dfsm, nodeid, pid, header->count, msg, msg_len)) | |
707 | goto leave; | |
708 | } else { | |
709 | ||
710 | int msg_res = -1; | |
711 | int res = dfsm->dfsm_callbacks->dfsm_deliver_fn( | |
712 | dfsm, dfsm->data, &msg_res, nodeid, pid, base_header->subtype, | |
713 | base_header->time, msg + sizeof(dfsm_message_normal_header_t), | |
714 | msg_len - sizeof(dfsm_message_normal_header_t)); | |
715 | ||
716 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) | |
717 | dfsm_record_local_result(dfsm, header->count, msg_res, res); | |
718 | ||
719 | if (res < 0) | |
720 | goto leave; | |
721 | } | |
722 | ||
723 | return; | |
724 | } | |
725 | ||
726 | /* state related messages | |
727 | * we needs right epoch - else we simply discard the message | |
728 | */ | |
729 | ||
730 | dfsm_message_state_header_t *header = (dfsm_message_state_header_t *)msg; | |
731 | ||
732 | if (msg_len < sizeof(dfsm_message_state_header_t)) { | |
733 | cfs_dom_critical(dfsm->log_domain, "received short state message (type = %d, subtype = %d, %ld bytes)", | |
734 | base_header->type, base_header->subtype, msg_len); | |
735 | goto leave; | |
736 | } | |
737 | ||
738 | if (base_header->type != DFSM_MESSAGE_SYNC_START && | |
739 | (memcmp(&header->epoch, &dfsm->sync_epoch, sizeof(dfsm_sync_epoch_t)) != 0)) { | |
740 | cfs_dom_debug(dfsm->log_domain, "ignore message (msg_type == %d) with " | |
741 | "wrong epoch (epoch %d/%d/%08X)", base_header->type, | |
742 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
743 | return; | |
744 | } | |
745 | ||
746 | msg += sizeof(dfsm_message_state_header_t); | |
747 | msg_len -= sizeof(dfsm_message_state_header_t); | |
748 | ||
749 | if (mode == DFSM_MODE_SYNCED) { | |
750 | if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
751 | ||
752 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
753 | dfsm->sync_info->nodes[i].synced = 1; | |
754 | ||
755 | if (!dfsm_deliver_queue(dfsm)) | |
756 | goto leave; | |
757 | ||
758 | return; | |
759 | ||
760 | } else if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST) { | |
761 | ||
762 | if (msg_len != sizeof(dfsm->csum_counter)) { | |
763 | cfs_dom_critical(dfsm->log_domain, "cpg received verify request with wrong length (%ld bytes) form node %d/%d", msg_len, nodeid, pid); | |
764 | goto leave; | |
765 | } | |
766 | ||
767 | uint64_t csum_id = *((uint64_t *)msg); | |
768 | msg += 8; msg_len -= 8; | |
769 | ||
770 | cfs_dom_debug(dfsm->log_domain, "got verify request from node %d %016zX", nodeid, csum_id); | |
771 | ||
772 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
773 | if (!dfsm->dfsm_callbacks->dfsm_checksum_fn( | |
774 | dfsm, dfsm->data, dfsm->csum, sizeof(dfsm->csum))) { | |
775 | cfs_dom_critical(dfsm->log_domain, "unable to compute data checksum"); | |
776 | goto leave; | |
777 | } | |
778 | ||
779 | dfsm->csum_epoch = header->epoch; | |
780 | dfsm->csum_id = csum_id; | |
781 | ||
782 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) { | |
783 | if (!dfsm_send_checksum(dfsm)) | |
784 | goto leave; | |
785 | } | |
786 | } | |
787 | ||
788 | return; | |
789 | ||
790 | } else if (base_header->type == DFSM_MESSAGE_VERIFY) { | |
791 | ||
792 | cfs_dom_debug(dfsm->log_domain, "received verify message"); | |
793 | ||
794 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
795 | ||
796 | if (msg_len != (sizeof(dfsm->csum_id) + sizeof(dfsm->csum))) { | |
797 | cfs_dom_critical(dfsm->log_domain, "cpg received verify message with wrong length (%ld bytes)", msg_len); | |
798 | goto leave; | |
799 | } | |
800 | ||
801 | uint64_t csum_id = *((uint64_t *)msg); | |
802 | msg += 8; msg_len -= 8; | |
803 | ||
804 | if (dfsm->csum_id == csum_id && | |
805 | (memcmp(&dfsm->csum_epoch, &header->epoch, sizeof(dfsm_sync_epoch_t)) == 0)) { | |
806 | if (memcmp(msg, dfsm->csum, sizeof(dfsm->csum)) != 0) { | |
807 | cfs_dom_critical(dfsm->log_domain, "wrong checksum %016zX != %016zX - restarting", | |
808 | *(uint64_t *)msg, *(uint64_t *)dfsm->csum); | |
809 | goto leave; | |
810 | } else { | |
811 | cfs_dom_message(dfsm->log_domain, "data verification successful"); | |
812 | } | |
813 | } else { | |
814 | cfs_dom_message(dfsm->log_domain, "skip verification - no checksum saved"); | |
815 | } | |
816 | } | |
817 | ||
818 | return; | |
819 | ||
820 | } else { | |
821 | /* ignore (we already got all required updates, or we are leader) */ | |
822 | cfs_dom_debug(dfsm->log_domain, "ignore state sync message %d", | |
823 | base_header->type); | |
824 | return; | |
825 | } | |
826 | ||
827 | } else if (mode == DFSM_MODE_START_SYNC) { | |
828 | ||
829 | if (base_header->type == DFSM_MESSAGE_SYNC_START) { | |
830 | ||
831 | if (nodeid != dfsm->lowest_nodeid) { | |
832 | cfs_dom_critical(dfsm->log_domain, "ignore sync request from wrong member %d/%d", | |
833 | nodeid, pid); | |
834 | } | |
835 | ||
836 | cfs_dom_message(dfsm->log_domain, "received sync request (epoch %d/%d/%08X)", | |
837 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
838 | ||
839 | dfsm->sync_epoch = header->epoch; | |
840 | ||
841 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
842 | ||
843 | unsigned int state_len = 0; | |
844 | gpointer state = NULL; | |
845 | ||
846 | state = dfsm->dfsm_callbacks->dfsm_get_state_fn(dfsm, dfsm->data, &state_len); | |
847 | ||
848 | if (!(state && state_len)) { | |
849 | cfs_dom_critical(dfsm->log_domain, "dfsm_get_state_fn failed"); | |
850 | goto leave; | |
851 | } | |
852 | ||
853 | struct iovec iov[1]; | |
854 | iov[0].iov_base = state; | |
855 | iov[0].iov_len = state_len; | |
856 | ||
857 | result = dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_STATE, iov, 1); | |
858 | ||
859 | if (state) | |
860 | g_free(state); | |
861 | ||
862 | if (result != CS_OK) | |
863 | goto leave; | |
864 | ||
865 | return; | |
866 | ||
867 | } else if (base_header->type == DFSM_MESSAGE_STATE) { | |
868 | ||
869 | dfsm_node_info_t *ni; | |
870 | ||
871 | if (!(ni = dfsm_node_info_lookup(dfsm, nodeid, pid))) { | |
872 | cfs_dom_critical(dfsm->log_domain, "received state for non-member %d/%d", nodeid, pid); | |
873 | goto leave; | |
874 | } | |
875 | ||
876 | if (ni->state) { | |
877 | cfs_dom_critical(dfsm->log_domain, "received duplicate state for member %d/%d", nodeid, pid); | |
878 | goto leave; | |
879 | } | |
880 | ||
881 | ni->state = g_memdup(msg, msg_len); | |
882 | ni->state_len = msg_len; | |
883 | ||
884 | int received_all = 1; | |
885 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
886 | if (!dfsm->sync_info->nodes[i].state) { | |
887 | received_all = 0; | |
888 | break; | |
889 | } | |
890 | } | |
891 | ||
892 | if (received_all) { | |
893 | cfs_dom_message(dfsm->log_domain, "received all states"); | |
894 | ||
895 | int res = dfsm->dfsm_callbacks->dfsm_process_state_update_fn(dfsm, dfsm->data, dfsm->sync_info); | |
896 | if (res < 0) | |
897 | goto leave; | |
898 | ||
899 | if (dfsm->sync_info->local->synced) { | |
900 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
901 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
902 | ||
903 | if (!dfsm_deliver_queue(dfsm)) | |
904 | goto leave; | |
905 | ||
906 | } else { | |
907 | dfsm_set_mode(dfsm, DFSM_MODE_UPDATE); | |
908 | ||
909 | if (!dfsm_deliver_queue(dfsm)) | |
910 | goto leave; | |
911 | } | |
912 | ||
913 | } | |
914 | ||
915 | return; | |
916 | } | |
917 | ||
918 | } else if (mode == DFSM_MODE_UPDATE) { | |
919 | ||
920 | if (base_header->type == DFSM_MESSAGE_UPDATE) { | |
921 | ||
922 | int res = dfsm->dfsm_callbacks->dfsm_process_update_fn( | |
923 | dfsm, dfsm->data, dfsm->sync_info, nodeid, pid, msg, msg_len); | |
924 | ||
925 | if (res < 0) | |
926 | goto leave; | |
927 | ||
928 | return; | |
929 | ||
930 | } else if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
931 | ||
932 | ||
933 | int res = dfsm->dfsm_callbacks->dfsm_commit_fn(dfsm, dfsm->data, dfsm->sync_info); | |
934 | ||
935 | if (res < 0) | |
936 | goto leave; | |
937 | ||
938 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
939 | dfsm->sync_info->nodes[i].synced = 1; | |
940 | ||
941 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
942 | ||
943 | if (!dfsm_deliver_sync_queue(dfsm)) | |
944 | goto leave; | |
945 | ||
946 | if (!dfsm_deliver_queue(dfsm)) | |
947 | goto leave; | |
948 | ||
949 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
950 | ||
951 | return; | |
952 | } | |
953 | ||
954 | } else { | |
955 | cfs_dom_critical(dfsm->log_domain, "internal error - unknown mode %d", mode); | |
956 | goto leave; | |
957 | } | |
958 | ||
959 | if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST || | |
960 | base_header->type == DFSM_MESSAGE_VERIFY) { | |
961 | ||
962 | cfs_dom_debug(dfsm->log_domain, "ignore verify message %d while not synced", base_header->type); | |
963 | ||
964 | } else { | |
965 | cfs_dom_critical(dfsm->log_domain, "received unknown state message type (type = %d, %ld bytes)", | |
966 | base_header->type, msg_len); | |
967 | goto leave; | |
968 | } | |
969 | ||
970 | leave: | |
971 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
972 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
973 | return; | |
974 | } | |
975 | ||
976 | static gboolean | |
977 | dfsm_resend_queue(dfsm_t *dfsm) | |
978 | { | |
979 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
980 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
981 | ||
982 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
983 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
984 | gboolean res = TRUE; | |
985 | ||
986 | while (iter != end) { | |
987 | GSequenceIter *cur = iter; | |
988 | iter = g_sequence_iter_next(iter); | |
989 | ||
990 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
991 | g_sequence_get(cur); | |
992 | ||
993 | if (qm->nodeid == dfsm->nodeid && qm->pid == dfsm->pid) { | |
994 | cpg_error_t result; | |
995 | struct iovec iov[1]; | |
996 | iov[0].iov_base = qm->msg; | |
997 | iov[0].iov_len = qm->msg_len; | |
998 | ||
999 | if ((result = dfsm_send_message_full(dfsm, iov, 1, 1)) != CS_OK) { | |
1000 | res = FALSE; | |
1001 | break; | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | dfsm_free_message_queue(dfsm); | |
1007 | ||
1008 | return res; | |
1009 | } | |
1010 | ||
1011 | static gboolean | |
1012 | dfsm_deliver_sync_queue(dfsm_t *dfsm) | |
1013 | { | |
1014 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1015 | ||
1016 | if (!dfsm->sync_queue) | |
1017 | return TRUE; | |
1018 | ||
1019 | gboolean res = TRUE; | |
1020 | ||
1021 | // fixme: cfs_debug | |
1022 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, | |
1023 | g_list_length(dfsm->sync_queue)); | |
1024 | ||
1025 | GList *iter = dfsm->sync_queue; | |
1026 | while (iter) { | |
1027 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
1028 | iter = g_list_next(iter); | |
1029 | ||
1030 | if (res && dfsm->mode == DFSM_MODE_SYNCED) { | |
1031 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1032 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1033 | } else { | |
1034 | res = FALSE; | |
1035 | } | |
1036 | ||
1037 | dfsm_free_queue_entry(qm); | |
1038 | } | |
1039 | g_list_free(dfsm->sync_queue); | |
1040 | dfsm->sync_queue = NULL; | |
1041 | ||
1042 | return res; | |
1043 | } | |
1044 | ||
1045 | static gboolean | |
1046 | dfsm_deliver_queue(dfsm_t *dfsm) | |
1047 | { | |
1048 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1049 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
1050 | ||
1051 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1052 | if (!qlen) | |
1053 | return TRUE; | |
1054 | ||
1055 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
1056 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
1057 | gboolean res = TRUE; | |
1058 | ||
1059 | // fixme: cfs_debug | |
1060 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, qlen); | |
1061 | ||
1062 | while (iter != end) { | |
1063 | GSequenceIter *cur = iter; | |
1064 | iter = g_sequence_iter_next(iter); | |
1065 | ||
1066 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
1067 | g_sequence_get(cur); | |
1068 | ||
1069 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, qm->nodeid, qm->pid); | |
1070 | if (!ni) { | |
d3eeade6 | 1071 | cfs_dom_message(dfsm->log_domain, "remove message from non-member %d/%d", |
fe000966 DM |
1072 | qm->nodeid, qm->pid); |
1073 | dfsm_free_queue_entry(qm); | |
1074 | g_sequence_remove(cur); | |
1075 | continue; | |
1076 | } | |
1077 | ||
1078 | if (dfsm->mode == DFSM_MODE_SYNCED) { | |
1079 | if (ni->synced) { | |
1080 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1081 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1082 | dfsm_free_queue_entry(qm); | |
1083 | g_sequence_remove(cur); | |
1084 | } | |
1085 | } else if (dfsm->mode == DFSM_MODE_UPDATE) { | |
1086 | if (ni->synced) { | |
1087 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
1088 | g_sequence_remove(cur); | |
1089 | } | |
1090 | } else { | |
1091 | res = FALSE; | |
1092 | break; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | return res; | |
1097 | } | |
1098 | ||
1099 | static void | |
1100 | dfsm_cpg_confchg_callback( | |
1101 | cpg_handle_t handle, | |
1102 | const struct cpg_name *group_name, | |
1103 | const struct cpg_address *member_list, | |
1104 | size_t member_list_entries, | |
1105 | const struct cpg_address *left_list, | |
1106 | size_t left_list_entries, | |
1107 | const struct cpg_address *joined_list, | |
1108 | size_t joined_list_entries) | |
1109 | { | |
1110 | cs_error_t result; | |
1111 | ||
1112 | dfsm_t *dfsm = NULL; | |
1113 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
1114 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
1115 | cfs_critical("cpg_context_get error: %d (%p)", result, dfsm); | |
1116 | return; /* we have no valid dfsm pointer, so we can just ignore this */ | |
1117 | } | |
1118 | ||
1119 | dfsm->we_are_member = 0; | |
1120 | ||
1121 | /* create new epoch */ | |
1122 | dfsm->local_epoch_counter++; | |
1123 | dfsm->sync_epoch.epoch = dfsm->local_epoch_counter; | |
1124 | dfsm->sync_epoch.nodeid = dfsm->nodeid; | |
1125 | dfsm->sync_epoch.pid = dfsm->pid; | |
1126 | dfsm->sync_epoch.time = time(NULL); | |
1127 | ||
1128 | /* invalidate saved checksum */ | |
1129 | dfsm->csum_id = dfsm->csum_counter; | |
1130 | memset(&dfsm->csum_epoch, 0, sizeof(dfsm->csum_epoch)); | |
1131 | ||
1132 | dfsm_free_sync_queue(dfsm); | |
1133 | ||
1134 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1135 | ||
1136 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
1137 | ||
1138 | if (mode >= DFSM_ERROR_MODE_START) { | |
1139 | cfs_dom_debug(dfsm->log_domain, "already left group - ignore message"); | |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | int lowest_nodeid = 0; | |
1144 | GString *str = g_string_new("members: "); | |
1145 | for (int i = 0; i < member_list_entries; i++) { | |
1146 | ||
1147 | g_string_append_printf(str, i ? ", %d/%d" : "%d/%d", | |
1148 | member_list[i].nodeid, member_list[i].pid); | |
1149 | ||
1150 | if (lowest_nodeid == 0 || lowest_nodeid > member_list[i].nodeid) | |
1151 | lowest_nodeid = member_list[i].nodeid; | |
1152 | ||
1153 | if (member_list[i].nodeid == dfsm->nodeid && | |
1154 | member_list[i].pid == dfsm->pid) | |
1155 | dfsm->we_are_member = 1; | |
1156 | } | |
1157 | ||
1158 | ||
1159 | if ((dfsm->we_are_member || mode != DFSM_MODE_START)) | |
1160 | cfs_dom_message(dfsm->log_domain, str->str); | |
1161 | ||
1162 | g_string_free(str, 1); | |
1163 | ||
1164 | dfsm->lowest_nodeid = lowest_nodeid; | |
1165 | ||
1166 | /* NOTE: one node can be in left and joined list at the same time, | |
1167 | so it is better to query member list. Also JOIN/LEAVE list are | |
1168 | different on different nodes! | |
1169 | */ | |
1170 | ||
1171 | dfsm_release_sync_resources(dfsm, member_list, member_list_entries); | |
1172 | ||
1173 | if (!dfsm->we_are_member) { | |
1174 | if (mode == DFSM_MODE_START) { | |
1175 | cfs_dom_debug(dfsm->log_domain, "ignore leave message"); | |
1176 | return; | |
1177 | } | |
1178 | cfs_dom_message(dfsm->log_domain, "we (%d/%d) left the process group", | |
1179 | dfsm->nodeid, dfsm->pid); | |
1180 | goto leave; | |
1181 | } | |
1182 | ||
1183 | if (member_list_entries > 1) { | |
1184 | ||
1185 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1186 | if (joined_list_entries && qlen) { | |
1187 | /* we need to make sure that all members have the same queue. */ | |
1188 | cfs_dom_message(dfsm->log_domain, "queue not emtpy - resening %d messages", qlen); | |
1189 | if (!dfsm_resend_queue(dfsm)) { | |
1190 | cfs_dom_critical(dfsm->log_domain, "dfsm_resend_queue failed"); | |
1191 | goto leave; | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | dfsm_set_mode(dfsm, DFSM_MODE_START_SYNC); | |
1196 | if (lowest_nodeid == dfsm->nodeid) { | |
1197 | if (!dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_SYNC_START, NULL, 0)) { | |
1198 | cfs_dom_critical(dfsm->log_domain, "failed to send SYNC_START message"); | |
1199 | goto leave; | |
1200 | } | |
1201 | } | |
1202 | } else { | |
1203 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
1204 | dfsm->sync_info->local->synced = 1; | |
1205 | if (!dfsm_deliver_queue(dfsm)) | |
1206 | goto leave; | |
1207 | } | |
1208 | ||
1209 | if (dfsm->dfsm_callbacks->dfsm_confchg_fn) | |
1210 | dfsm->dfsm_callbacks->dfsm_confchg_fn(dfsm, dfsm->data, member_list, member_list_entries); | |
1211 | ||
1212 | return; | |
1213 | leave: | |
1214 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
1215 | return; | |
1216 | } | |
1217 | ||
1218 | static cpg_callbacks_t cpg_callbacks = { | |
1219 | .cpg_deliver_fn = dfsm_cpg_deliver_callback, | |
1220 | .cpg_confchg_fn = dfsm_cpg_confchg_callback, | |
1221 | }; | |
1222 | ||
1223 | dfsm_t * | |
1224 | dfsm_new( | |
1225 | gpointer data, | |
1226 | const char *group_name, | |
1227 | const char *log_domain, | |
1228 | guint32 protocol_version, | |
1229 | dfsm_callbacks_t *callbacks) | |
1230 | { | |
1231 | g_return_val_if_fail(sizeof(dfsm_message_header_t) == 16, NULL); | |
1232 | g_return_val_if_fail(sizeof(dfsm_message_state_header_t) == 32, NULL); | |
1233 | g_return_val_if_fail(sizeof(dfsm_message_normal_header_t) == 24, NULL); | |
1234 | ||
1235 | g_return_val_if_fail(callbacks != NULL, NULL); | |
1236 | g_return_val_if_fail(callbacks->dfsm_deliver_fn != NULL, NULL); | |
1237 | ||
1238 | g_return_val_if_fail(callbacks->dfsm_get_state_fn != NULL, NULL); | |
1239 | g_return_val_if_fail(callbacks->dfsm_process_state_update_fn != NULL, NULL); | |
1240 | g_return_val_if_fail(callbacks->dfsm_process_update_fn != NULL, NULL); | |
1241 | g_return_val_if_fail(callbacks->dfsm_commit_fn != NULL, NULL); | |
1242 | ||
1243 | dfsm_t *dfsm; | |
1244 | ||
1245 | if ((dfsm = g_new0(dfsm_t, 1)) == NULL) | |
1246 | return NULL; | |
1247 | ||
1248 | if (!(dfsm->sync_mutex = g_mutex_new())) | |
1249 | goto err; | |
1250 | ||
1251 | if (!(dfsm->sync_cond = g_cond_new())) | |
1252 | goto err; | |
1253 | ||
1254 | if (!(dfsm->results = g_hash_table_new(g_int64_hash, g_int64_equal))) | |
1255 | goto err; | |
1256 | ||
1257 | if (!(dfsm->msg_queue = g_sequence_new(NULL))) | |
1258 | goto err; | |
1259 | ||
6392e29a | 1260 | dfsm->log_domain = log_domain; |
fe000966 DM |
1261 | dfsm->data = data; |
1262 | dfsm->mode = DFSM_MODE_START; | |
1263 | dfsm->protocol_version = protocol_version; | |
1264 | strcpy (dfsm->cpg_group_name.value, group_name); | |
1265 | dfsm->cpg_group_name.length = strlen (group_name) + 1; | |
1266 | ||
1267 | dfsm->cpg_callbacks = &cpg_callbacks; | |
1268 | dfsm->dfsm_callbacks = callbacks; | |
1269 | ||
1270 | dfsm->members = g_hash_table_new(dfsm_sync_info_hash, dfsm_sync_info_equal); | |
1271 | if (!dfsm->members) | |
1272 | goto err; | |
1273 | ||
1274 | if ((dfsm->mode_mutex = g_mutex_new()) == NULL) | |
1275 | goto err; | |
1276 | ||
1277 | return dfsm; | |
1278 | ||
1279 | err: | |
1280 | dfsm_destroy(dfsm); | |
1281 | return NULL; | |
1282 | } | |
1283 | ||
1284 | gboolean | |
1285 | dfsm_lowest_nodeid(dfsm_t *dfsm) | |
1286 | { | |
1287 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1288 | ||
1289 | if (dfsm->lowest_nodeid && (dfsm->lowest_nodeid == dfsm->nodeid)) | |
1290 | return TRUE; | |
1291 | ||
1292 | return FALSE; | |
1293 | } | |
1294 | ||
1295 | cs_error_t | |
1296 | dfsm_verify_request(dfsm_t *dfsm) | |
1297 | { | |
1298 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1299 | ||
1300 | /* only do when we have lowest nodeid */ | |
1301 | if (!dfsm->lowest_nodeid || (dfsm->lowest_nodeid != dfsm->nodeid)) | |
1302 | return CS_OK; | |
1303 | ||
1304 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1305 | if (mode != DFSM_MODE_SYNCED) | |
1306 | return CS_OK; | |
1307 | ||
1308 | int len = 1; | |
1309 | struct iovec iov[len]; | |
1310 | ||
1311 | if (dfsm->csum_counter != dfsm->csum_id) { | |
1312 | g_message("delay verify request %016zX", dfsm->csum_counter + 1); | |
1313 | return CS_OK; | |
1314 | }; | |
1315 | ||
1316 | dfsm->csum_counter++; | |
1317 | iov[0].iov_base = (char *)&dfsm->csum_counter; | |
1318 | iov[0].iov_len = sizeof(dfsm->csum_counter); | |
1319 | ||
1320 | cfs_debug("send verify request %016zX", dfsm->csum_counter); | |
1321 | ||
1322 | cs_error_t result; | |
1323 | result = dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_VERIFY_REQUEST, iov, len); | |
1324 | ||
1325 | if (result != CS_OK) | |
1326 | cfs_dom_critical(dfsm->log_domain, "failed to send VERIFY_REQUEST message"); | |
1327 | ||
1328 | return result; | |
1329 | } | |
1330 | ||
1331 | ||
1332 | cs_error_t | |
1333 | dfsm_dispatch( | |
1334 | dfsm_t *dfsm, | |
1335 | cs_dispatch_flags_t dispatch_types) | |
1336 | { | |
1337 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1338 | g_return_val_if_fail(dfsm->cpg_handle != 0, CS_ERR_INVALID_PARAM); | |
1339 | ||
1340 | cs_error_t result; | |
1341 | ||
1342 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1343 | int retries = 0; | |
1344 | loop: | |
1345 | result = cpg_dispatch(dfsm->cpg_handle, dispatch_types); | |
1346 | if (result == CPG_ERR_TRY_AGAIN) { | |
1347 | nanosleep(&tvreq, NULL); | |
1348 | ++retries; | |
1349 | if ((retries % 10) == 0) | |
1350 | cfs_dom_message(dfsm->log_domain, "cpg_dispatch retry %d", retries); | |
1351 | goto loop; | |
1352 | } | |
1353 | ||
1354 | if (!(result == CS_OK || result == CS_ERR_TRY_AGAIN)) { | |
1355 | cfs_dom_critical(dfsm->log_domain, "cpg_dispatch failed: %d", result); | |
1356 | } | |
1357 | ||
1358 | return result; | |
1359 | } | |
1360 | ||
1361 | ||
1362 | cs_error_t | |
1363 | dfsm_initialize(dfsm_t *dfsm, int *fd) | |
1364 | { | |
1365 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1366 | g_return_val_if_fail(fd != NULL, CS_ERR_INVALID_PARAM); | |
1367 | ||
1368 | /* remove old messages */ | |
1369 | dfsm_free_message_queue(dfsm); | |
1370 | dfsm_send_sync_message_abort(dfsm); | |
1371 | ||
1372 | dfsm->joined = FALSE; | |
1373 | dfsm->we_are_member = 0; | |
1374 | ||
1375 | dfsm_set_mode(dfsm, DFSM_MODE_START); | |
1376 | ||
1377 | cs_error_t result; | |
1378 | ||
1379 | if (dfsm->cpg_handle == 0) { | |
1380 | if ((result = cpg_initialize(&dfsm->cpg_handle, dfsm->cpg_callbacks)) != CS_OK) { | |
1381 | cfs_dom_critical(dfsm->log_domain, "cpg_initialize failed: %d", result); | |
1382 | dfsm->cpg_handle = 0; | |
1383 | goto fail; | |
1384 | } | |
1385 | ||
1386 | if ((result = cpg_local_get(dfsm->cpg_handle, &dfsm->nodeid)) != CS_OK) { | |
1387 | cfs_dom_critical(dfsm->log_domain, "cpg_local_get failed: %d", result); | |
1388 | goto fail; | |
1389 | } | |
1390 | ||
1391 | dfsm->pid = getpid(); | |
1392 | ||
1393 | result = cpg_context_set(dfsm->cpg_handle, dfsm); | |
1394 | if (result != CS_OK) { | |
1395 | cfs_dom_critical(dfsm->log_domain, "cpg_context_set failed: %d", result); | |
1396 | goto fail; | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | result = cpg_fd_get(dfsm->cpg_handle, fd); | |
1401 | if (result != CS_OK) { | |
1402 | cfs_dom_critical(dfsm->log_domain, "cpg_fd_get failed: %d", result); | |
1403 | goto fail; | |
1404 | } | |
1405 | ||
1406 | return CS_OK; | |
1407 | ||
1408 | fail: | |
1409 | if (dfsm->cpg_handle) | |
1410 | cpg_finalize(dfsm->cpg_handle); | |
1411 | dfsm->cpg_handle = 0; | |
1412 | return result; | |
1413 | } | |
1414 | ||
1415 | cs_error_t | |
1416 | dfsm_join(dfsm_t *dfsm) | |
1417 | { | |
1418 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1419 | g_return_val_if_fail(dfsm->cpg_handle != 0, CS_ERR_LIBRARY); | |
1420 | g_return_val_if_fail(dfsm->joined == 0, CS_ERR_EXIST); | |
1421 | ||
1422 | cs_error_t result; | |
1423 | ||
1424 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1425 | int retries = 0; | |
1426 | loop: | |
1427 | result = cpg_join(dfsm->cpg_handle, &dfsm->cpg_group_name); | |
1428 | if (result == CPG_ERR_TRY_AGAIN) { | |
1429 | nanosleep(&tvreq, NULL); | |
1430 | ++retries; | |
1431 | if ((retries % 10) == 0) | |
1432 | cfs_dom_message(dfsm->log_domain, "cpg_join retry %d", retries); | |
1433 | goto loop; | |
1434 | } | |
1435 | ||
1436 | if (result != CS_OK) { | |
1437 | cfs_dom_critical(dfsm->log_domain, "cpg_join failed: %d", result); | |
1438 | return result; | |
1439 | } | |
1440 | ||
1441 | dfsm->joined = TRUE; | |
1442 | return TRUE; | |
1443 | } | |
1444 | ||
1445 | cs_error_t | |
1446 | dfsm_leave (dfsm_t *dfsm) | |
1447 | { | |
1448 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1449 | g_return_val_if_fail(dfsm->joined, CS_ERR_NOT_EXIST); | |
1450 | ||
1451 | cs_error_t result; | |
1452 | ||
1453 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1454 | int retries = 0; | |
1455 | loop: | |
1456 | result = cpg_leave(dfsm->cpg_handle, &dfsm->cpg_group_name); | |
1457 | if (result == CPG_ERR_TRY_AGAIN) { | |
1458 | nanosleep(&tvreq, NULL); | |
1459 | ++retries; | |
1460 | if ((retries % 10) == 0) | |
1461 | cfs_dom_message(dfsm->log_domain, "cpg_leave retry %d", retries); | |
1462 | goto loop; | |
1463 | } | |
1464 | ||
1465 | if (result != CS_OK) { | |
1466 | cfs_dom_critical(dfsm->log_domain, "cpg_leave failed: %d", result); | |
1467 | return result; | |
1468 | } | |
1469 | ||
1470 | dfsm->joined = FALSE; | |
1471 | ||
1472 | return TRUE; | |
1473 | } | |
1474 | ||
1475 | gboolean | |
1476 | dfsm_finalize(dfsm_t *dfsm) | |
1477 | { | |
1478 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1479 | ||
1480 | dfsm_send_sync_message_abort(dfsm); | |
1481 | ||
1482 | if (dfsm->joined) | |
1483 | dfsm_leave(dfsm); | |
1484 | ||
1485 | if (dfsm->cpg_handle) { | |
1486 | cpg_finalize(dfsm->cpg_handle); | |
1487 | dfsm->cpg_handle = 0; | |
1488 | dfsm->joined = FALSE; | |
1489 | dfsm->we_are_member = 0; | |
1490 | } | |
1491 | ||
1492 | return TRUE; | |
1493 | } | |
1494 | ||
1495 | void | |
1496 | dfsm_destroy(dfsm_t *dfsm) | |
1497 | { | |
1498 | g_return_if_fail(dfsm != NULL); | |
1499 | ||
1500 | dfsm_finalize(dfsm); | |
1501 | ||
1502 | if (dfsm->sync_info && dfsm->sync_info->data && dfsm->dfsm_callbacks->dfsm_cleanup_fn) | |
1503 | dfsm->dfsm_callbacks->dfsm_cleanup_fn(dfsm, dfsm->data, dfsm->sync_info); | |
1504 | ||
1505 | dfsm_free_sync_queue(dfsm); | |
1506 | ||
1507 | if (dfsm->mode_mutex) | |
1508 | g_mutex_free (dfsm->mode_mutex); | |
1509 | ||
1510 | if (dfsm->sync_mutex) | |
1511 | g_mutex_free (dfsm->sync_mutex); | |
1512 | ||
1513 | if (dfsm->sync_cond) | |
1514 | g_cond_free (dfsm->sync_cond); | |
1515 | ||
1516 | if (dfsm->results) | |
1517 | g_hash_table_destroy(dfsm->results); | |
1518 | ||
1519 | if (dfsm->msg_queue) { | |
1520 | dfsm_free_message_queue(dfsm); | |
1521 | g_sequence_free(dfsm->msg_queue); | |
1522 | } | |
1523 | ||
1524 | if (dfsm->sync_info) | |
1525 | g_free(dfsm->sync_info); | |
1526 | ||
1527 | if (dfsm->cpg_handle) | |
1528 | cpg_finalize(dfsm->cpg_handle); | |
1529 | ||
1530 | if (dfsm->members) | |
1531 | g_hash_table_destroy(dfsm->members); | |
1532 | ||
fe000966 DM |
1533 | g_free(dfsm); |
1534 | } | |
1535 | ||
1536 | typedef struct { | |
1537 | dfsm_t *dfsm; | |
1538 | } service_dfsm_private_t; | |
1539 | ||
1540 | static gboolean | |
1541 | service_dfsm_finalize( | |
1542 | cfs_service_t *service, | |
1543 | gpointer context) | |
1544 | { | |
1545 | g_return_val_if_fail(service != NULL, FALSE); | |
1546 | g_return_val_if_fail(context != NULL, FALSE); | |
1547 | ||
1548 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1549 | dfsm_t *dfsm = private->dfsm; | |
1550 | ||
1551 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1552 | ||
1553 | return dfsm_finalize(dfsm); | |
1554 | } | |
1555 | ||
1556 | static int | |
1557 | service_dfsm_initialize( | |
1558 | cfs_service_t *service, | |
1559 | gpointer context) | |
1560 | { | |
1561 | g_return_val_if_fail(service != NULL, -1); | |
1562 | g_return_val_if_fail(context != NULL, -1); | |
1563 | ||
1564 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1565 | dfsm_t *dfsm = private->dfsm; | |
1566 | ||
1567 | g_return_val_if_fail(dfsm != NULL, -1); | |
1568 | ||
1569 | /* serious internal error - don't try to recover */ | |
1570 | if (!dfsm_restartable(dfsm)) | |
1571 | return -1; | |
1572 | ||
1573 | int fd = -1; | |
1574 | ||
1575 | cs_error_t result; | |
1576 | if ((result = dfsm_initialize(dfsm, &fd)) != CS_OK) | |
1577 | return -1; | |
1578 | ||
1579 | result = dfsm_join(dfsm); | |
1580 | if (result != CS_OK) { | |
1581 | /* we can't dispatch if not joined, so we need to finalize */ | |
1582 | dfsm_finalize(dfsm); | |
1583 | return -1; | |
1584 | } | |
1585 | ||
1586 | return fd; | |
1587 | } | |
1588 | ||
1589 | static gboolean | |
1590 | service_dfsm_dispatch( | |
1591 | cfs_service_t *service, | |
1592 | gpointer context) | |
1593 | { | |
1594 | g_return_val_if_fail(service != NULL, FALSE); | |
1595 | g_return_val_if_fail(context != NULL, FALSE); | |
1596 | ||
1597 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1598 | dfsm_t *dfsm = private->dfsm; | |
1599 | ||
1600 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1601 | g_return_val_if_fail(dfsm->cpg_handle != 0, FALSE); | |
1602 | ||
1603 | cs_error_t result; | |
1604 | ||
1605 | result = dfsm_dispatch(dfsm, CPG_DISPATCH_ONE); | |
1606 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) | |
1607 | goto finalize; | |
1608 | if (result != CS_OK) | |
1609 | goto fail; | |
1610 | ||
1611 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1612 | if (mode >= DFSM_ERROR_MODE_START) { | |
1613 | if (dfsm->joined) { | |
1614 | result = dfsm_leave(dfsm); | |
1615 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) | |
1616 | goto finalize; | |
1617 | if (result != CS_OK) | |
1618 | goto finalize; | |
1619 | } else { | |
1620 | if (!dfsm->we_are_member) | |
1621 | return FALSE; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | return TRUE; | |
1626 | ||
1627 | fail: | |
1628 | cfs_service_set_restartable(service, dfsm_restartable(dfsm)); | |
1629 | return FALSE; | |
1630 | ||
1631 | finalize: | |
1632 | dfsm_finalize(dfsm); | |
1633 | goto fail; | |
1634 | } | |
1635 | ||
1636 | static void | |
1637 | service_dfsm_timer( | |
1638 | cfs_service_t *service, | |
1639 | gpointer context) | |
1640 | { | |
1641 | g_return_if_fail(service != NULL); | |
1642 | g_return_if_fail(context != NULL); | |
1643 | ||
1644 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1645 | dfsm_t *dfsm = private->dfsm; | |
1646 | ||
1647 | g_return_if_fail(dfsm != NULL); | |
1648 | ||
1649 | dfsm_verify_request(dfsm); | |
1650 | } | |
1651 | ||
1652 | static cfs_service_callbacks_t cfs_dfsm_callbacks = { | |
1653 | .cfs_service_initialize_fn = service_dfsm_initialize, | |
1654 | .cfs_service_finalize_fn = service_dfsm_finalize, | |
1655 | .cfs_service_dispatch_fn = service_dfsm_dispatch, | |
1656 | .cfs_service_timer_fn = service_dfsm_timer, | |
1657 | }; | |
1658 | ||
1659 | cfs_service_t * | |
1660 | service_dfsm_new(dfsm_t *dfsm) | |
1661 | { | |
1662 | cfs_service_t *service; | |
1663 | ||
1664 | g_return_val_if_fail(dfsm != NULL, NULL); | |
1665 | ||
1666 | service_dfsm_private_t *private = g_new0(service_dfsm_private_t, 1); | |
1667 | if (!private) | |
1668 | return NULL; | |
1669 | ||
1670 | private->dfsm = dfsm; | |
1671 | ||
1672 | service = cfs_service_new(&cfs_dfsm_callbacks, dfsm->log_domain, private); | |
1673 | ||
1674 | return service; | |
1675 | } | |
1676 | ||
1677 | void | |
1678 | service_dfsm_destroy(cfs_service_t *service) | |
1679 | { | |
1680 | g_return_if_fail(service != NULL); | |
1681 | ||
1682 | service_dfsm_private_t *private = | |
1683 | (service_dfsm_private_t *)cfs_service_get_context(service); | |
1684 | ||
1685 | g_free(private); | |
1686 | g_free(service); | |
1687 | } | |
1688 | ||
1689 | ||
1690 | ||
1691 |