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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> | |
e5a5a3ea | 33 | #include <inttypes.h> |
fe000966 DM |
34 | #include <unistd.h> |
35 | #include <string.h> | |
36 | #include <stdlib.h> | |
37 | ||
38 | #include <corosync/corotypes.h> | |
39 | #include <corosync/cpg.h> | |
40 | #include <glib.h> | |
41 | ||
42 | #include "cfs-utils.h" | |
43 | #include "dfsm.h" | |
44 | ||
45 | static cpg_callbacks_t cpg_callbacks; | |
46 | ||
47 | typedef enum { | |
48 | DFSM_MODE_START = 0, | |
49 | DFSM_MODE_START_SYNC = 1, | |
50 | DFSM_MODE_SYNCED = 2, | |
51 | DFSM_MODE_UPDATE = 3, | |
52 | ||
53 | /* values >= 128 indicates abnormal/error conditions */ | |
54 | DFSM_ERROR_MODE_START = 128, | |
55 | DFSM_MODE_LEAVE = 253, | |
56 | DFSM_MODE_VERSION_ERROR = 254, | |
57 | DFSM_MODE_ERROR = 255, | |
58 | } dfsm_mode_t; | |
59 | ||
60 | typedef enum { | |
61 | DFSM_MESSAGE_NORMAL = 0, | |
62 | DFSM_MESSAGE_SYNC_START = 1, | |
63 | DFSM_MESSAGE_STATE = 2, | |
64 | DFSM_MESSAGE_UPDATE = 3, | |
65 | DFSM_MESSAGE_UPDATE_COMPLETE = 4, | |
66 | DFSM_MESSAGE_VERIFY_REQUEST = 5, | |
67 | DFSM_MESSAGE_VERIFY = 6, | |
68 | } dfsm_message_t; | |
69 | ||
70 | #define DFSM_VALID_STATE_MESSAGE(mt) (mt >= DFSM_MESSAGE_SYNC_START && mt <= DFSM_MESSAGE_VERIFY) | |
71 | ||
72 | typedef struct { | |
73 | uint16_t type; | |
74 | uint16_t subtype; | |
75 | uint32_t protocol_version; | |
76 | uint32_t time; | |
77 | uint32_t reserved; | |
78 | } dfsm_message_header_t; | |
79 | ||
80 | typedef struct { | |
81 | uint32_t epoch; // per process (not globally unique) | |
82 | uint32_t time; | |
83 | uint32_t nodeid; | |
84 | uint32_t pid; | |
85 | } dfsm_sync_epoch_t; | |
86 | ||
87 | typedef struct { | |
88 | dfsm_message_header_t base; | |
89 | dfsm_sync_epoch_t epoch; | |
90 | } dfsm_message_state_header_t; | |
91 | ||
92 | typedef struct { | |
93 | dfsm_message_header_t base; | |
94 | uint64_t count; | |
95 | } dfsm_message_normal_header_t; | |
96 | ||
97 | typedef struct { | |
98 | uint32_t nodeid; | |
99 | uint32_t pid; | |
100 | uint64_t msg_count; | |
101 | void *msg; | |
102 | int msg_len; // fixme: unsigned? | |
103 | } dfsm_queued_message_t; | |
104 | ||
105 | struct dfsm { | |
6392e29a | 106 | const char *log_domain; |
fe000966 DM |
107 | cpg_callbacks_t *cpg_callbacks; |
108 | dfsm_callbacks_t *dfsm_callbacks; | |
109 | cpg_handle_t cpg_handle; | |
110 | struct cpg_name cpg_group_name; | |
111 | uint32_t nodeid; | |
112 | uint32_t pid; | |
113 | int we_are_member; | |
114 | ||
115 | guint32 protocol_version; | |
116 | gpointer data; | |
117 | ||
118 | gboolean joined; | |
119 | ||
120 | /* mode is protected with mode_mutex */ | |
89fde9ac | 121 | GMutex mode_mutex; |
fe000966 DM |
122 | dfsm_mode_t mode; |
123 | ||
124 | GHashTable *members; /* contains dfsm_node_info_t pointers */ | |
125 | dfsm_sync_info_t *sync_info; | |
126 | uint32_t local_epoch_counter; | |
127 | dfsm_sync_epoch_t sync_epoch; | |
128 | uint32_t lowest_nodeid; | |
129 | GSequence *msg_queue; | |
130 | GList *sync_queue; | |
131 | ||
132 | /* synchrounous message transmission, protected with sync_mutex */ | |
89fde9ac DM |
133 | GMutex sync_mutex; |
134 | GCond sync_cond; | |
fe000966 DM |
135 | GHashTable *results; |
136 | uint64_t msgcount; | |
137 | uint64_t msgcount_rcvd; | |
138 | ||
139 | /* state verification */ | |
140 | guchar csum[32]; | |
141 | dfsm_sync_epoch_t csum_epoch; | |
142 | uint64_t csum_id; | |
143 | uint64_t csum_counter; | |
144 | }; | |
145 | ||
146 | static gboolean dfsm_deliver_queue(dfsm_t *dfsm); | |
147 | static gboolean dfsm_deliver_sync_queue(dfsm_t *dfsm); | |
148 | ||
149 | gboolean | |
150 | dfsm_nodeid_is_local( | |
151 | dfsm_t *dfsm, | |
152 | uint32_t nodeid, | |
153 | uint32_t pid) | |
154 | { | |
155 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
156 | ||
157 | return (nodeid == dfsm->nodeid && pid == dfsm->pid); | |
158 | } | |
159 | ||
160 | ||
161 | static void | |
162 | dfsm_send_sync_message_abort(dfsm_t *dfsm) | |
163 | { | |
164 | g_return_if_fail(dfsm != NULL); | |
fe000966 | 165 | |
89fde9ac | 166 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 | 167 | dfsm->msgcount_rcvd = dfsm->msgcount; |
89fde9ac DM |
168 | g_cond_broadcast (&dfsm->sync_cond); |
169 | g_mutex_unlock (&dfsm->sync_mutex); | |
fe000966 DM |
170 | } |
171 | ||
172 | static void | |
173 | dfsm_record_local_result( | |
174 | dfsm_t *dfsm, | |
175 | uint64_t msg_count, | |
176 | int msg_result, | |
177 | gboolean processed) | |
178 | { | |
179 | g_return_if_fail(dfsm != NULL); | |
fe000966 DM |
180 | g_return_if_fail(dfsm->results != NULL); |
181 | ||
89fde9ac | 182 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
183 | dfsm_result_t *rp = (dfsm_result_t *)g_hash_table_lookup(dfsm->results, &msg_count); |
184 | if (rp) { | |
185 | rp->result = msg_result; | |
186 | rp->processed = processed; | |
187 | } | |
188 | dfsm->msgcount_rcvd = msg_count; | |
89fde9ac DM |
189 | g_cond_broadcast (&dfsm->sync_cond); |
190 | g_mutex_unlock (&dfsm->sync_mutex); | |
fe000966 DM |
191 | } |
192 | ||
89fde9ac | 193 | static cs_error_t |
fe000966 DM |
194 | dfsm_send_message_full( |
195 | dfsm_t *dfsm, | |
196 | struct iovec *iov, | |
197 | unsigned int len, | |
198 | int retry) | |
199 | { | |
200 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
201 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
202 | ||
203 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
89fde9ac | 204 | cs_error_t result; |
fe000966 DM |
205 | int retries = 0; |
206 | loop: | |
207 | result = cpg_mcast_joined(dfsm->cpg_handle, CPG_TYPE_AGREED, iov, len); | |
89fde9ac | 208 | if (retry && result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
209 | nanosleep(&tvreq, NULL); |
210 | ++retries; | |
211 | if ((retries % 10) == 0) | |
212 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retry %d", retries); | |
213 | if (retries < 100) | |
214 | goto loop; | |
215 | } | |
216 | ||
217 | if (retries) | |
218 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retried %d times", retries); | |
219 | ||
220 | if (result != CS_OK && | |
89fde9ac | 221 | (!retry || result != CS_ERR_TRY_AGAIN)) |
fe000966 DM |
222 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); |
223 | ||
224 | return result; | |
225 | } | |
226 | ||
89fde9ac | 227 | static cs_error_t |
fe000966 DM |
228 | dfsm_send_state_message_full( |
229 | dfsm_t *dfsm, | |
230 | uint16_t type, | |
231 | struct iovec *iov, | |
232 | unsigned int len) | |
233 | { | |
234 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
235 | g_return_val_if_fail(DFSM_VALID_STATE_MESSAGE(type), CS_ERR_INVALID_PARAM); | |
236 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
237 | ||
238 | dfsm_message_state_header_t header; | |
239 | header.base.type = type; | |
240 | header.base.subtype = 0; | |
241 | header.base.protocol_version = dfsm->protocol_version; | |
242 | header.base.time = time(NULL); | |
243 | header.base.reserved = 0; | |
244 | ||
245 | header.epoch = dfsm->sync_epoch; | |
246 | ||
247 | struct iovec real_iov[len + 1]; | |
248 | ||
249 | real_iov[0].iov_base = (char *)&header; | |
250 | real_iov[0].iov_len = sizeof(header); | |
251 | ||
252 | for (int i = 0; i < len; i++) | |
253 | real_iov[i + 1] = iov[i]; | |
254 | ||
255 | return dfsm_send_message_full(dfsm, real_iov, len + 1, 1); | |
256 | } | |
257 | ||
89fde9ac | 258 | cs_error_t |
fe000966 DM |
259 | dfsm_send_update( |
260 | dfsm_t *dfsm, | |
261 | struct iovec *iov, | |
262 | unsigned int len) | |
263 | { | |
264 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE, iov, len); | |
265 | } | |
266 | ||
89fde9ac | 267 | cs_error_t |
fe000966 DM |
268 | dfsm_send_update_complete(dfsm_t *dfsm) |
269 | { | |
270 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE_COMPLETE, NULL, 0); | |
271 | } | |
272 | ||
273 | ||
89fde9ac | 274 | cs_error_t |
fe000966 DM |
275 | dfsm_send_message( |
276 | dfsm_t *dfsm, | |
277 | uint16_t msgtype, | |
278 | struct iovec *iov, | |
279 | int len) | |
280 | { | |
281 | return dfsm_send_message_sync(dfsm, msgtype, iov, len, NULL); | |
282 | } | |
283 | ||
89fde9ac | 284 | cs_error_t |
fe000966 DM |
285 | dfsm_send_message_sync( |
286 | dfsm_t *dfsm, | |
287 | uint16_t msgtype, | |
288 | struct iovec *iov, | |
289 | int len, | |
290 | dfsm_result_t *rp) | |
291 | { | |
292 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
fe000966 DM |
293 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); |
294 | ||
89fde9ac | 295 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
296 | /* note: hold lock until message is sent - to guarantee ordering */ |
297 | uint64_t msgcount = ++dfsm->msgcount; | |
298 | if (rp) { | |
299 | rp->msgcount = msgcount; | |
300 | rp->processed = 0; | |
301 | g_hash_table_replace(dfsm->results, &rp->msgcount, rp); | |
302 | } | |
303 | ||
304 | dfsm_message_normal_header_t header; | |
305 | header.base.type = DFSM_MESSAGE_NORMAL; | |
306 | header.base.subtype = msgtype; | |
307 | header.base.protocol_version = dfsm->protocol_version; | |
308 | header.base.time = time(NULL); | |
309 | header.base.reserved = 0; | |
310 | header.count = msgcount; | |
311 | ||
312 | struct iovec real_iov[len + 1]; | |
313 | ||
314 | real_iov[0].iov_base = (char *)&header; | |
315 | real_iov[0].iov_len = sizeof(header); | |
316 | ||
317 | for (int i = 0; i < len; i++) | |
318 | real_iov[i + 1] = iov[i]; | |
319 | ||
89fde9ac | 320 | cs_error_t result = dfsm_send_message_full(dfsm, real_iov, len + 1, 1); |
fe000966 | 321 | |
89fde9ac | 322 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
323 | |
324 | if (result != CS_OK) { | |
325 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); | |
326 | ||
327 | if (rp) { | |
89fde9ac | 328 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 | 329 | g_hash_table_remove(dfsm->results, &rp->msgcount); |
89fde9ac | 330 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
331 | } |
332 | return result; | |
333 | } | |
334 | ||
335 | if (rp) { | |
89fde9ac | 336 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
337 | |
338 | while (dfsm->msgcount_rcvd < msgcount) | |
89fde9ac | 339 | g_cond_wait (&dfsm->sync_cond, &dfsm->sync_mutex); |
fe000966 DM |
340 | |
341 | ||
342 | g_hash_table_remove(dfsm->results, &rp->msgcount); | |
343 | ||
89fde9ac | 344 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
345 | |
346 | return rp->processed ? CS_OK : CS_ERR_FAILED_OPERATION; | |
347 | } | |
348 | ||
349 | return CS_OK; | |
350 | } | |
351 | ||
352 | static gboolean | |
353 | dfsm_send_checksum(dfsm_t *dfsm) | |
354 | { | |
355 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
356 | ||
357 | int len = 2; | |
358 | struct iovec iov[len]; | |
359 | ||
360 | iov[0].iov_base = (char *)&dfsm->csum_id; | |
361 | iov[0].iov_len = sizeof(dfsm->csum_id); | |
362 | iov[1].iov_base = dfsm->csum; | |
363 | iov[1].iov_len = sizeof(dfsm->csum); | |
364 | ||
365 | gboolean res = (dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_VERIFY, iov, len) == CS_OK); | |
366 | ||
367 | return res; | |
368 | } | |
369 | ||
370 | static void | |
371 | dfsm_free_queue_entry(gpointer data) | |
372 | { | |
373 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)data; | |
374 | g_free (qm->msg); | |
375 | g_free (qm); | |
376 | } | |
377 | ||
378 | static void | |
379 | dfsm_free_message_queue(dfsm_t *dfsm) | |
380 | { | |
381 | g_return_if_fail(dfsm != NULL); | |
382 | g_return_if_fail(dfsm->msg_queue != NULL); | |
383 | ||
384 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
385 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
386 | while (iter != end) { | |
387 | GSequenceIter *cur = iter; | |
388 | iter = g_sequence_iter_next(iter); | |
389 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
390 | g_sequence_get(cur); | |
391 | dfsm_free_queue_entry(qm); | |
392 | g_sequence_remove(cur); | |
393 | } | |
394 | } | |
395 | ||
396 | static void | |
397 | dfsm_free_sync_queue(dfsm_t *dfsm) | |
398 | { | |
399 | g_return_if_fail(dfsm != NULL); | |
400 | ||
401 | GList *iter = dfsm->sync_queue; | |
402 | while (iter) { | |
403 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
404 | iter = g_list_next(iter); | |
405 | dfsm_free_queue_entry(qm); | |
406 | } | |
407 | ||
408 | g_list_free(dfsm->sync_queue); | |
409 | dfsm->sync_queue = NULL; | |
410 | } | |
411 | ||
412 | static gint | |
413 | message_queue_sort_fn( | |
414 | gconstpointer a, | |
415 | gconstpointer b, | |
416 | gpointer user_data) | |
417 | { | |
418 | return ((dfsm_queued_message_t *)a)->msg_count - | |
419 | ((dfsm_queued_message_t *)b)->msg_count; | |
420 | } | |
421 | ||
422 | static dfsm_node_info_t * | |
423 | dfsm_node_info_lookup( | |
424 | dfsm_t *dfsm, | |
425 | uint32_t nodeid, | |
426 | uint32_t pid) | |
427 | { | |
428 | g_return_val_if_fail(dfsm != NULL, NULL); | |
429 | g_return_val_if_fail(dfsm->members != NULL, NULL); | |
430 | ||
431 | dfsm_node_info_t info = { .nodeid = nodeid, .pid = pid }; | |
432 | ||
433 | return (dfsm_node_info_t *)g_hash_table_lookup(dfsm->members, &info); | |
434 | } | |
435 | ||
436 | static dfsm_queued_message_t * | |
437 | dfsm_queue_add_message( | |
438 | dfsm_t *dfsm, | |
439 | uint32_t nodeid, | |
440 | uint32_t pid, | |
441 | uint64_t msg_count, | |
442 | const void *msg, | |
443 | size_t msg_len) | |
444 | { | |
445 | g_return_val_if_fail(dfsm != NULL, NULL); | |
446 | g_return_val_if_fail(msg != NULL, NULL); | |
447 | g_return_val_if_fail(msg_len != 0, NULL); | |
448 | ||
449 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, nodeid, pid); | |
450 | if (!ni) { | |
451 | cfs_dom_critical(dfsm->log_domain, "dfsm_node_info_lookup failed"); | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | dfsm_queued_message_t *qm = g_new0(dfsm_queued_message_t, 1); | |
456 | g_return_val_if_fail(qm != NULL, NULL); | |
457 | ||
458 | qm->nodeid = nodeid; | |
459 | qm->pid = pid; | |
460 | qm->msg = g_memdup (msg, msg_len); | |
461 | qm->msg_len = msg_len; | |
462 | qm->msg_count = msg_count; | |
463 | ||
464 | if (dfsm->mode == DFSM_MODE_UPDATE && ni->synced) { | |
465 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
466 | } else { | |
467 | /* NOTE: we only need to sort the queue because we resend all | |
468 | * queued messages sometimes. | |
469 | */ | |
470 | g_sequence_insert_sorted(dfsm->msg_queue, qm, message_queue_sort_fn, NULL); | |
471 | } | |
472 | ||
473 | return qm; | |
474 | } | |
475 | ||
476 | static guint | |
477 | dfsm_sync_info_hash(gconstpointer key) | |
478 | { | |
479 | dfsm_node_info_t *info = (dfsm_node_info_t *)key; | |
480 | ||
481 | return g_int_hash(&info->nodeid) + g_int_hash(&info->pid); | |
482 | } | |
483 | ||
484 | static gboolean | |
485 | dfsm_sync_info_equal( | |
486 | gconstpointer v1, | |
487 | gconstpointer v2) | |
488 | { | |
489 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
490 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
491 | ||
492 | if (info1->nodeid == info2->nodeid && | |
493 | info1->pid == info2->pid) | |
494 | return TRUE; | |
495 | ||
496 | return FALSE; | |
497 | } | |
498 | ||
499 | static int | |
500 | dfsm_sync_info_compare( | |
501 | gconstpointer v1, | |
502 | gconstpointer v2) | |
503 | { | |
504 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
505 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
506 | ||
507 | if (info1->nodeid != info2->nodeid) | |
508 | return info1->nodeid - info2->nodeid; | |
509 | ||
510 | return info1->pid - info2->pid; | |
511 | } | |
512 | ||
513 | static void | |
514 | dfsm_set_mode( | |
515 | dfsm_t *dfsm, | |
516 | dfsm_mode_t new_mode) | |
517 | { | |
518 | g_return_if_fail(dfsm != NULL); | |
519 | ||
520 | cfs_debug("dfsm_set_mode - set mode to %d", new_mode); | |
521 | ||
522 | int changed = 0; | |
89fde9ac | 523 | g_mutex_lock (&dfsm->mode_mutex); |
fe000966 DM |
524 | if (dfsm->mode != new_mode) { |
525 | if (new_mode < DFSM_ERROR_MODE_START || | |
526 | (dfsm->mode < DFSM_ERROR_MODE_START || new_mode >= dfsm->mode)) { | |
527 | dfsm->mode = new_mode; | |
528 | changed = 1; | |
529 | } | |
530 | } | |
89fde9ac | 531 | g_mutex_unlock (&dfsm->mode_mutex); |
fe000966 DM |
532 | |
533 | if (!changed) | |
534 | return; | |
535 | ||
536 | if (new_mode == DFSM_MODE_START) { | |
537 | cfs_dom_message(dfsm->log_domain, "start cluster connection"); | |
538 | } else if (new_mode == DFSM_MODE_START_SYNC) { | |
539 | cfs_dom_message(dfsm->log_domain, "starting data syncronisation"); | |
540 | } else if (new_mode == DFSM_MODE_SYNCED) { | |
541 | cfs_dom_message(dfsm->log_domain, "all data is up to date"); | |
542 | if (dfsm->dfsm_callbacks->dfsm_synced_fn) | |
543 | dfsm->dfsm_callbacks->dfsm_synced_fn(dfsm); | |
544 | } else if (new_mode == DFSM_MODE_UPDATE) { | |
545 | cfs_dom_message(dfsm->log_domain, "waiting for updates from leader"); | |
546 | } else if (new_mode == DFSM_MODE_LEAVE) { | |
547 | cfs_dom_critical(dfsm->log_domain, "leaving CPG group"); | |
548 | } else if (new_mode == DFSM_MODE_ERROR) { | |
549 | cfs_dom_critical(dfsm->log_domain, "serious internal error - stop cluster connection"); | |
550 | } else if (new_mode == DFSM_MODE_VERSION_ERROR) { | |
551 | cfs_dom_critical(dfsm->log_domain, "detected newer protocol - please update this node"); | |
552 | } | |
553 | } | |
554 | ||
555 | static dfsm_mode_t | |
556 | dfsm_get_mode(dfsm_t *dfsm) | |
557 | { | |
558 | g_return_val_if_fail(dfsm != NULL, DFSM_MODE_ERROR); | |
559 | ||
89fde9ac | 560 | g_mutex_lock (&dfsm->mode_mutex); |
fe000966 | 561 | dfsm_mode_t mode = dfsm->mode; |
89fde9ac | 562 | g_mutex_unlock (&dfsm->mode_mutex); |
fe000966 DM |
563 | |
564 | return mode; | |
565 | } | |
566 | ||
567 | gboolean | |
568 | dfsm_restartable(dfsm_t *dfsm) | |
569 | { | |
570 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
571 | ||
572 | return !(mode == DFSM_MODE_ERROR || | |
573 | mode == DFSM_MODE_VERSION_ERROR); | |
574 | } | |
575 | ||
576 | void | |
577 | dfsm_set_errormode(dfsm_t *dfsm) | |
578 | { | |
579 | dfsm_set_mode(dfsm, DFSM_MODE_ERROR); | |
580 | } | |
581 | ||
582 | static void | |
583 | dfsm_release_sync_resources( | |
584 | dfsm_t *dfsm, | |
585 | const struct cpg_address *member_list, | |
586 | size_t member_list_entries) | |
587 | { | |
588 | g_return_if_fail(dfsm != NULL); | |
589 | g_return_if_fail(dfsm->members != NULL); | |
590 | g_return_if_fail(!member_list_entries || member_list != NULL); | |
591 | ||
592 | cfs_debug("enter dfsm_release_sync_resources"); | |
593 | ||
594 | if (dfsm->sync_info) { | |
595 | ||
596 | if (dfsm->sync_info->data && dfsm->dfsm_callbacks->dfsm_cleanup_fn) { | |
597 | dfsm->dfsm_callbacks->dfsm_cleanup_fn(dfsm, dfsm->data, dfsm->sync_info); | |
598 | dfsm->sync_info->data = NULL; | |
599 | } | |
600 | ||
601 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
602 | if (dfsm->sync_info->nodes[i].state) { | |
603 | g_free(dfsm->sync_info->nodes[i].state); | |
604 | dfsm->sync_info->nodes[i].state = NULL; | |
605 | dfsm->sync_info->nodes[i].state_len = 0; | |
606 | } | |
607 | } | |
608 | } | |
609 | ||
610 | if (member_list) { | |
611 | ||
612 | g_hash_table_remove_all(dfsm->members); | |
613 | ||
614 | if (dfsm->sync_info) | |
615 | g_free(dfsm->sync_info); | |
616 | ||
617 | int size = sizeof(dfsm_sync_info_t) + | |
618 | member_list_entries*sizeof(dfsm_sync_info_t); | |
619 | dfsm_sync_info_t *sync_info = dfsm->sync_info = g_malloc0(size); | |
620 | sync_info->node_count = member_list_entries; | |
621 | ||
622 | for (int i = 0; i < member_list_entries; i++) { | |
623 | sync_info->nodes[i].nodeid = member_list[i].nodeid; | |
624 | sync_info->nodes[i].pid = member_list[i].pid; | |
625 | } | |
626 | ||
627 | qsort(sync_info->nodes, member_list_entries, sizeof(dfsm_node_info_t), | |
628 | dfsm_sync_info_compare); | |
629 | ||
630 | for (int i = 0; i < member_list_entries; i++) { | |
631 | dfsm_node_info_t *info = &sync_info->nodes[i]; | |
632 | g_hash_table_insert(dfsm->members, info, info); | |
633 | if (info->nodeid == dfsm->nodeid && info->pid == dfsm->pid) | |
634 | sync_info->local = info; | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | static void | |
640 | dfsm_cpg_deliver_callback( | |
641 | cpg_handle_t handle, | |
642 | const struct cpg_name *group_name, | |
643 | uint32_t nodeid, | |
644 | uint32_t pid, | |
645 | void *msg, | |
646 | size_t msg_len) | |
647 | { | |
648 | cs_error_t result; | |
649 | ||
650 | dfsm_t *dfsm = NULL; | |
651 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
652 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
84e1bd35 | 653 | cfs_critical("cpg_context_get error: %d (%p)", result, (void *) dfsm); |
fe000966 DM |
654 | return; /* we have no valid dfsm pointer, so we can just ignore this */ |
655 | } | |
656 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
657 | ||
658 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
659 | ||
660 | if (mode >= DFSM_ERROR_MODE_START) { | |
661 | cfs_dom_debug(dfsm->log_domain, "error mode - ignoring message"); | |
662 | goto leave; | |
663 | } | |
664 | ||
665 | if (!dfsm->sync_info) { | |
666 | cfs_dom_critical(dfsm->log_domain, "no dfsm_sync_info - internal error"); | |
667 | goto leave; | |
668 | } | |
669 | ||
670 | if (msg_len < sizeof(dfsm_message_header_t)) { | |
e5a5a3ea | 671 | cfs_dom_critical(dfsm->log_domain, "received short message (%zd bytes)", msg_len); |
fe000966 DM |
672 | goto leave; |
673 | } | |
674 | ||
675 | dfsm_message_header_t *base_header = (dfsm_message_header_t *)msg; | |
676 | ||
677 | if (base_header->protocol_version > dfsm->protocol_version) { | |
678 | cfs_dom_critical(dfsm->log_domain, "received message with protocol version %d", | |
679 | base_header->protocol_version); | |
680 | dfsm_set_mode(dfsm, DFSM_MODE_VERSION_ERROR); | |
681 | return; | |
682 | } else if (base_header->protocol_version < dfsm->protocol_version) { | |
683 | cfs_dom_message(dfsm->log_domain, "ignore message with wrong protocol version %d", | |
684 | base_header->protocol_version); | |
685 | return; | |
686 | } | |
687 | ||
688 | if (base_header->type == DFSM_MESSAGE_NORMAL) { | |
689 | ||
690 | dfsm_message_normal_header_t *header = (dfsm_message_normal_header_t *)msg; | |
691 | ||
692 | if (msg_len < sizeof(dfsm_message_normal_header_t)) { | |
e5a5a3ea | 693 | cfs_dom_critical(dfsm->log_domain, "received short message (type = %d, subtype = %d, %zd bytes)", |
fe000966 DM |
694 | base_header->type, base_header->subtype, msg_len); |
695 | goto leave; | |
696 | } | |
697 | ||
698 | if (mode != DFSM_MODE_SYNCED) { | |
e5a5a3ea | 699 | cfs_dom_debug(dfsm->log_domain, "queue message %" PRIu64 " (subtype = %d, length = %zd)", |
fe000966 DM |
700 | header->count, base_header->subtype, msg_len); |
701 | ||
702 | if (!dfsm_queue_add_message(dfsm, nodeid, pid, header->count, msg, msg_len)) | |
703 | goto leave; | |
704 | } else { | |
705 | ||
706 | int msg_res = -1; | |
707 | int res = dfsm->dfsm_callbacks->dfsm_deliver_fn( | |
708 | dfsm, dfsm->data, &msg_res, nodeid, pid, base_header->subtype, | |
709 | base_header->time, msg + sizeof(dfsm_message_normal_header_t), | |
710 | msg_len - sizeof(dfsm_message_normal_header_t)); | |
711 | ||
712 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) | |
713 | dfsm_record_local_result(dfsm, header->count, msg_res, res); | |
714 | ||
715 | if (res < 0) | |
716 | goto leave; | |
717 | } | |
718 | ||
719 | return; | |
720 | } | |
721 | ||
722 | /* state related messages | |
723 | * we needs right epoch - else we simply discard the message | |
724 | */ | |
725 | ||
726 | dfsm_message_state_header_t *header = (dfsm_message_state_header_t *)msg; | |
727 | ||
728 | if (msg_len < sizeof(dfsm_message_state_header_t)) { | |
e5a5a3ea | 729 | cfs_dom_critical(dfsm->log_domain, "received short state message (type = %d, subtype = %d, %zd bytes)", |
fe000966 DM |
730 | base_header->type, base_header->subtype, msg_len); |
731 | goto leave; | |
732 | } | |
733 | ||
734 | if (base_header->type != DFSM_MESSAGE_SYNC_START && | |
735 | (memcmp(&header->epoch, &dfsm->sync_epoch, sizeof(dfsm_sync_epoch_t)) != 0)) { | |
736 | cfs_dom_debug(dfsm->log_domain, "ignore message (msg_type == %d) with " | |
737 | "wrong epoch (epoch %d/%d/%08X)", base_header->type, | |
738 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
739 | return; | |
740 | } | |
741 | ||
742 | msg += sizeof(dfsm_message_state_header_t); | |
743 | msg_len -= sizeof(dfsm_message_state_header_t); | |
744 | ||
745 | if (mode == DFSM_MODE_SYNCED) { | |
746 | if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
747 | ||
748 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
749 | dfsm->sync_info->nodes[i].synced = 1; | |
750 | ||
751 | if (!dfsm_deliver_queue(dfsm)) | |
752 | goto leave; | |
753 | ||
754 | return; | |
755 | ||
756 | } else if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST) { | |
757 | ||
758 | if (msg_len != sizeof(dfsm->csum_counter)) { | |
e5a5a3ea | 759 | cfs_dom_critical(dfsm->log_domain, "cpg received verify request with wrong length (%zd bytes) form node %d/%d", msg_len, nodeid, pid); |
fe000966 DM |
760 | goto leave; |
761 | } | |
762 | ||
763 | uint64_t csum_id = *((uint64_t *)msg); | |
764 | msg += 8; msg_len -= 8; | |
765 | ||
e5a5a3ea | 766 | cfs_dom_debug(dfsm->log_domain, "got verify request from node %d %016" PRIX64, nodeid, csum_id); |
fe000966 DM |
767 | |
768 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
769 | if (!dfsm->dfsm_callbacks->dfsm_checksum_fn( | |
770 | dfsm, dfsm->data, dfsm->csum, sizeof(dfsm->csum))) { | |
771 | cfs_dom_critical(dfsm->log_domain, "unable to compute data checksum"); | |
772 | goto leave; | |
773 | } | |
774 | ||
775 | dfsm->csum_epoch = header->epoch; | |
776 | dfsm->csum_id = csum_id; | |
777 | ||
778 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) { | |
779 | if (!dfsm_send_checksum(dfsm)) | |
780 | goto leave; | |
781 | } | |
782 | } | |
783 | ||
784 | return; | |
785 | ||
786 | } else if (base_header->type == DFSM_MESSAGE_VERIFY) { | |
787 | ||
788 | cfs_dom_debug(dfsm->log_domain, "received verify message"); | |
789 | ||
790 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
791 | ||
792 | if (msg_len != (sizeof(dfsm->csum_id) + sizeof(dfsm->csum))) { | |
e5a5a3ea | 793 | cfs_dom_critical(dfsm->log_domain, "cpg received verify message with wrong length (%zd bytes)", msg_len); |
fe000966 DM |
794 | goto leave; |
795 | } | |
796 | ||
797 | uint64_t csum_id = *((uint64_t *)msg); | |
798 | msg += 8; msg_len -= 8; | |
799 | ||
800 | if (dfsm->csum_id == csum_id && | |
801 | (memcmp(&dfsm->csum_epoch, &header->epoch, sizeof(dfsm_sync_epoch_t)) == 0)) { | |
802 | if (memcmp(msg, dfsm->csum, sizeof(dfsm->csum)) != 0) { | |
e5a5a3ea | 803 | cfs_dom_critical(dfsm->log_domain, "wrong checksum %016" PRIX64 " != %016" PRIX64 " - restarting", |
fe000966 DM |
804 | *(uint64_t *)msg, *(uint64_t *)dfsm->csum); |
805 | goto leave; | |
806 | } else { | |
807 | cfs_dom_message(dfsm->log_domain, "data verification successful"); | |
808 | } | |
809 | } else { | |
810 | cfs_dom_message(dfsm->log_domain, "skip verification - no checksum saved"); | |
811 | } | |
812 | } | |
813 | ||
814 | return; | |
815 | ||
816 | } else { | |
817 | /* ignore (we already got all required updates, or we are leader) */ | |
818 | cfs_dom_debug(dfsm->log_domain, "ignore state sync message %d", | |
819 | base_header->type); | |
820 | return; | |
821 | } | |
822 | ||
823 | } else if (mode == DFSM_MODE_START_SYNC) { | |
824 | ||
825 | if (base_header->type == DFSM_MESSAGE_SYNC_START) { | |
826 | ||
827 | if (nodeid != dfsm->lowest_nodeid) { | |
828 | cfs_dom_critical(dfsm->log_domain, "ignore sync request from wrong member %d/%d", | |
829 | nodeid, pid); | |
830 | } | |
831 | ||
832 | cfs_dom_message(dfsm->log_domain, "received sync request (epoch %d/%d/%08X)", | |
833 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
834 | ||
835 | dfsm->sync_epoch = header->epoch; | |
836 | ||
837 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
838 | ||
839 | unsigned int state_len = 0; | |
840 | gpointer state = NULL; | |
841 | ||
842 | state = dfsm->dfsm_callbacks->dfsm_get_state_fn(dfsm, dfsm->data, &state_len); | |
843 | ||
844 | if (!(state && state_len)) { | |
845 | cfs_dom_critical(dfsm->log_domain, "dfsm_get_state_fn failed"); | |
846 | goto leave; | |
847 | } | |
848 | ||
849 | struct iovec iov[1]; | |
850 | iov[0].iov_base = state; | |
851 | iov[0].iov_len = state_len; | |
852 | ||
853 | result = dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_STATE, iov, 1); | |
854 | ||
855 | if (state) | |
856 | g_free(state); | |
857 | ||
858 | if (result != CS_OK) | |
859 | goto leave; | |
860 | ||
861 | return; | |
862 | ||
863 | } else if (base_header->type == DFSM_MESSAGE_STATE) { | |
864 | ||
865 | dfsm_node_info_t *ni; | |
866 | ||
867 | if (!(ni = dfsm_node_info_lookup(dfsm, nodeid, pid))) { | |
868 | cfs_dom_critical(dfsm->log_domain, "received state for non-member %d/%d", nodeid, pid); | |
869 | goto leave; | |
870 | } | |
871 | ||
872 | if (ni->state) { | |
873 | cfs_dom_critical(dfsm->log_domain, "received duplicate state for member %d/%d", nodeid, pid); | |
874 | goto leave; | |
875 | } | |
876 | ||
877 | ni->state = g_memdup(msg, msg_len); | |
878 | ni->state_len = msg_len; | |
879 | ||
880 | int received_all = 1; | |
881 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
882 | if (!dfsm->sync_info->nodes[i].state) { | |
883 | received_all = 0; | |
884 | break; | |
885 | } | |
886 | } | |
887 | ||
888 | if (received_all) { | |
889 | cfs_dom_message(dfsm->log_domain, "received all states"); | |
890 | ||
891 | int res = dfsm->dfsm_callbacks->dfsm_process_state_update_fn(dfsm, dfsm->data, dfsm->sync_info); | |
892 | if (res < 0) | |
893 | goto leave; | |
894 | ||
895 | if (dfsm->sync_info->local->synced) { | |
896 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
897 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
898 | ||
899 | if (!dfsm_deliver_queue(dfsm)) | |
900 | goto leave; | |
901 | ||
902 | } else { | |
903 | dfsm_set_mode(dfsm, DFSM_MODE_UPDATE); | |
904 | ||
905 | if (!dfsm_deliver_queue(dfsm)) | |
906 | goto leave; | |
907 | } | |
908 | ||
909 | } | |
910 | ||
911 | return; | |
912 | } | |
913 | ||
914 | } else if (mode == DFSM_MODE_UPDATE) { | |
915 | ||
916 | if (base_header->type == DFSM_MESSAGE_UPDATE) { | |
917 | ||
918 | int res = dfsm->dfsm_callbacks->dfsm_process_update_fn( | |
919 | dfsm, dfsm->data, dfsm->sync_info, nodeid, pid, msg, msg_len); | |
920 | ||
921 | if (res < 0) | |
922 | goto leave; | |
923 | ||
924 | return; | |
925 | ||
926 | } else if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
927 | ||
928 | ||
929 | int res = dfsm->dfsm_callbacks->dfsm_commit_fn(dfsm, dfsm->data, dfsm->sync_info); | |
930 | ||
931 | if (res < 0) | |
932 | goto leave; | |
933 | ||
934 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
935 | dfsm->sync_info->nodes[i].synced = 1; | |
936 | ||
937 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
938 | ||
939 | if (!dfsm_deliver_sync_queue(dfsm)) | |
940 | goto leave; | |
941 | ||
942 | if (!dfsm_deliver_queue(dfsm)) | |
943 | goto leave; | |
944 | ||
945 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
946 | ||
947 | return; | |
948 | } | |
949 | ||
950 | } else { | |
951 | cfs_dom_critical(dfsm->log_domain, "internal error - unknown mode %d", mode); | |
952 | goto leave; | |
953 | } | |
954 | ||
955 | if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST || | |
956 | base_header->type == DFSM_MESSAGE_VERIFY) { | |
957 | ||
958 | cfs_dom_debug(dfsm->log_domain, "ignore verify message %d while not synced", base_header->type); | |
959 | ||
960 | } else { | |
e5a5a3ea | 961 | cfs_dom_critical(dfsm->log_domain, "received unknown state message type (type = %d, %zd bytes)", |
fe000966 DM |
962 | base_header->type, msg_len); |
963 | goto leave; | |
964 | } | |
965 | ||
966 | leave: | |
967 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
968 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
969 | return; | |
970 | } | |
971 | ||
972 | static gboolean | |
973 | dfsm_resend_queue(dfsm_t *dfsm) | |
974 | { | |
975 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
976 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
977 | ||
978 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
979 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
980 | gboolean res = TRUE; | |
981 | ||
982 | while (iter != end) { | |
983 | GSequenceIter *cur = iter; | |
984 | iter = g_sequence_iter_next(iter); | |
985 | ||
986 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
987 | g_sequence_get(cur); | |
988 | ||
989 | if (qm->nodeid == dfsm->nodeid && qm->pid == dfsm->pid) { | |
89fde9ac | 990 | cs_error_t result; |
fe000966 DM |
991 | struct iovec iov[1]; |
992 | iov[0].iov_base = qm->msg; | |
993 | iov[0].iov_len = qm->msg_len; | |
994 | ||
995 | if ((result = dfsm_send_message_full(dfsm, iov, 1, 1)) != CS_OK) { | |
996 | res = FALSE; | |
997 | break; | |
998 | } | |
999 | } | |
1000 | } | |
1001 | ||
1002 | dfsm_free_message_queue(dfsm); | |
1003 | ||
1004 | return res; | |
1005 | } | |
1006 | ||
1007 | static gboolean | |
1008 | dfsm_deliver_sync_queue(dfsm_t *dfsm) | |
1009 | { | |
1010 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1011 | ||
1012 | if (!dfsm->sync_queue) | |
1013 | return TRUE; | |
1014 | ||
1015 | gboolean res = TRUE; | |
1016 | ||
1017 | // fixme: cfs_debug | |
1018 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, | |
1019 | g_list_length(dfsm->sync_queue)); | |
1020 | ||
1021 | GList *iter = dfsm->sync_queue; | |
1022 | while (iter) { | |
1023 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
1024 | iter = g_list_next(iter); | |
1025 | ||
1026 | if (res && dfsm->mode == DFSM_MODE_SYNCED) { | |
1027 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1028 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1029 | } else { | |
1030 | res = FALSE; | |
1031 | } | |
1032 | ||
1033 | dfsm_free_queue_entry(qm); | |
1034 | } | |
1035 | g_list_free(dfsm->sync_queue); | |
1036 | dfsm->sync_queue = NULL; | |
1037 | ||
1038 | return res; | |
1039 | } | |
1040 | ||
1041 | static gboolean | |
1042 | dfsm_deliver_queue(dfsm_t *dfsm) | |
1043 | { | |
1044 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1045 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
1046 | ||
1047 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1048 | if (!qlen) | |
1049 | return TRUE; | |
1050 | ||
1051 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
1052 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
1053 | gboolean res = TRUE; | |
1054 | ||
1055 | // fixme: cfs_debug | |
1056 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, qlen); | |
1057 | ||
1058 | while (iter != end) { | |
1059 | GSequenceIter *cur = iter; | |
1060 | iter = g_sequence_iter_next(iter); | |
1061 | ||
1062 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
1063 | g_sequence_get(cur); | |
1064 | ||
1065 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, qm->nodeid, qm->pid); | |
1066 | if (!ni) { | |
d3eeade6 | 1067 | cfs_dom_message(dfsm->log_domain, "remove message from non-member %d/%d", |
fe000966 DM |
1068 | qm->nodeid, qm->pid); |
1069 | dfsm_free_queue_entry(qm); | |
1070 | g_sequence_remove(cur); | |
1071 | continue; | |
1072 | } | |
1073 | ||
1074 | if (dfsm->mode == DFSM_MODE_SYNCED) { | |
1075 | if (ni->synced) { | |
1076 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1077 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1078 | dfsm_free_queue_entry(qm); | |
1079 | g_sequence_remove(cur); | |
1080 | } | |
1081 | } else if (dfsm->mode == DFSM_MODE_UPDATE) { | |
1082 | if (ni->synced) { | |
1083 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
1084 | g_sequence_remove(cur); | |
1085 | } | |
1086 | } else { | |
1087 | res = FALSE; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | return res; | |
1093 | } | |
1094 | ||
1095 | static void | |
1096 | dfsm_cpg_confchg_callback( | |
1097 | cpg_handle_t handle, | |
1098 | const struct cpg_name *group_name, | |
1099 | const struct cpg_address *member_list, | |
1100 | size_t member_list_entries, | |
1101 | const struct cpg_address *left_list, | |
1102 | size_t left_list_entries, | |
1103 | const struct cpg_address *joined_list, | |
1104 | size_t joined_list_entries) | |
1105 | { | |
1106 | cs_error_t result; | |
1107 | ||
1108 | dfsm_t *dfsm = NULL; | |
1109 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
1110 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
84e1bd35 | 1111 | cfs_critical("cpg_context_get error: %d (%p)", result, (void *) dfsm); |
fe000966 DM |
1112 | return; /* we have no valid dfsm pointer, so we can just ignore this */ |
1113 | } | |
1114 | ||
1115 | dfsm->we_are_member = 0; | |
1116 | ||
1117 | /* create new epoch */ | |
1118 | dfsm->local_epoch_counter++; | |
1119 | dfsm->sync_epoch.epoch = dfsm->local_epoch_counter; | |
1120 | dfsm->sync_epoch.nodeid = dfsm->nodeid; | |
1121 | dfsm->sync_epoch.pid = dfsm->pid; | |
1122 | dfsm->sync_epoch.time = time(NULL); | |
1123 | ||
1124 | /* invalidate saved checksum */ | |
1125 | dfsm->csum_id = dfsm->csum_counter; | |
1126 | memset(&dfsm->csum_epoch, 0, sizeof(dfsm->csum_epoch)); | |
1127 | ||
1128 | dfsm_free_sync_queue(dfsm); | |
1129 | ||
1130 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1131 | ||
1132 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
1133 | ||
1134 | if (mode >= DFSM_ERROR_MODE_START) { | |
1135 | cfs_dom_debug(dfsm->log_domain, "already left group - ignore message"); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | int lowest_nodeid = 0; | |
e26a1b5f | 1140 | GString *member_ids = g_string_new(NULL); |
fe000966 DM |
1141 | for (int i = 0; i < member_list_entries; i++) { |
1142 | ||
e26a1b5f | 1143 | g_string_append_printf(member_ids, i ? ", %d/%d" : "%d/%d", |
fe000966 DM |
1144 | member_list[i].nodeid, member_list[i].pid); |
1145 | ||
1146 | if (lowest_nodeid == 0 || lowest_nodeid > member_list[i].nodeid) | |
1147 | lowest_nodeid = member_list[i].nodeid; | |
1148 | ||
1149 | if (member_list[i].nodeid == dfsm->nodeid && | |
1150 | member_list[i].pid == dfsm->pid) | |
1151 | dfsm->we_are_member = 1; | |
1152 | } | |
1153 | ||
1154 | ||
1155 | if ((dfsm->we_are_member || mode != DFSM_MODE_START)) | |
e26a1b5f | 1156 | cfs_dom_message(dfsm->log_domain, "members: %s", member_ids->str); |
fe000966 | 1157 | |
e26a1b5f | 1158 | g_string_free(member_ids, 1); |
fe000966 DM |
1159 | |
1160 | dfsm->lowest_nodeid = lowest_nodeid; | |
1161 | ||
1162 | /* NOTE: one node can be in left and joined list at the same time, | |
1163 | so it is better to query member list. Also JOIN/LEAVE list are | |
1164 | different on different nodes! | |
1165 | */ | |
1166 | ||
1167 | dfsm_release_sync_resources(dfsm, member_list, member_list_entries); | |
1168 | ||
1169 | if (!dfsm->we_are_member) { | |
1170 | if (mode == DFSM_MODE_START) { | |
1171 | cfs_dom_debug(dfsm->log_domain, "ignore leave message"); | |
1172 | return; | |
1173 | } | |
1174 | cfs_dom_message(dfsm->log_domain, "we (%d/%d) left the process group", | |
1175 | dfsm->nodeid, dfsm->pid); | |
1176 | goto leave; | |
1177 | } | |
1178 | ||
1179 | if (member_list_entries > 1) { | |
1180 | ||
1181 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1182 | if (joined_list_entries && qlen) { | |
1183 | /* we need to make sure that all members have the same queue. */ | |
1184 | cfs_dom_message(dfsm->log_domain, "queue not emtpy - resening %d messages", qlen); | |
1185 | if (!dfsm_resend_queue(dfsm)) { | |
1186 | cfs_dom_critical(dfsm->log_domain, "dfsm_resend_queue failed"); | |
1187 | goto leave; | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | dfsm_set_mode(dfsm, DFSM_MODE_START_SYNC); | |
1192 | if (lowest_nodeid == dfsm->nodeid) { | |
1193 | if (!dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_SYNC_START, NULL, 0)) { | |
1194 | cfs_dom_critical(dfsm->log_domain, "failed to send SYNC_START message"); | |
1195 | goto leave; | |
1196 | } | |
1197 | } | |
1198 | } else { | |
1199 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
1200 | dfsm->sync_info->local->synced = 1; | |
1201 | if (!dfsm_deliver_queue(dfsm)) | |
1202 | goto leave; | |
1203 | } | |
1204 | ||
1205 | if (dfsm->dfsm_callbacks->dfsm_confchg_fn) | |
1206 | dfsm->dfsm_callbacks->dfsm_confchg_fn(dfsm, dfsm->data, member_list, member_list_entries); | |
1207 | ||
1208 | return; | |
1209 | leave: | |
1210 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
1211 | return; | |
1212 | } | |
1213 | ||
1214 | static cpg_callbacks_t cpg_callbacks = { | |
1215 | .cpg_deliver_fn = dfsm_cpg_deliver_callback, | |
1216 | .cpg_confchg_fn = dfsm_cpg_confchg_callback, | |
1217 | }; | |
1218 | ||
1219 | dfsm_t * | |
1220 | dfsm_new( | |
1221 | gpointer data, | |
1222 | const char *group_name, | |
1223 | const char *log_domain, | |
1224 | guint32 protocol_version, | |
1225 | dfsm_callbacks_t *callbacks) | |
1226 | { | |
1227 | g_return_val_if_fail(sizeof(dfsm_message_header_t) == 16, NULL); | |
1228 | g_return_val_if_fail(sizeof(dfsm_message_state_header_t) == 32, NULL); | |
1229 | g_return_val_if_fail(sizeof(dfsm_message_normal_header_t) == 24, NULL); | |
1230 | ||
1231 | g_return_val_if_fail(callbacks != NULL, NULL); | |
1232 | g_return_val_if_fail(callbacks->dfsm_deliver_fn != NULL, NULL); | |
1233 | ||
1234 | g_return_val_if_fail(callbacks->dfsm_get_state_fn != NULL, NULL); | |
1235 | g_return_val_if_fail(callbacks->dfsm_process_state_update_fn != NULL, NULL); | |
1236 | g_return_val_if_fail(callbacks->dfsm_process_update_fn != NULL, NULL); | |
1237 | g_return_val_if_fail(callbacks->dfsm_commit_fn != NULL, NULL); | |
1238 | ||
1239 | dfsm_t *dfsm; | |
1240 | ||
1241 | if ((dfsm = g_new0(dfsm_t, 1)) == NULL) | |
1242 | return NULL; | |
1243 | ||
89fde9ac DM |
1244 | g_mutex_init(&dfsm->sync_mutex); |
1245 | ||
1246 | g_cond_init(&dfsm->sync_cond); | |
fe000966 DM |
1247 | |
1248 | if (!(dfsm->results = g_hash_table_new(g_int64_hash, g_int64_equal))) | |
1249 | goto err; | |
1250 | ||
1251 | if (!(dfsm->msg_queue = g_sequence_new(NULL))) | |
1252 | goto err; | |
1253 | ||
6392e29a | 1254 | dfsm->log_domain = log_domain; |
fe000966 DM |
1255 | dfsm->data = data; |
1256 | dfsm->mode = DFSM_MODE_START; | |
1257 | dfsm->protocol_version = protocol_version; | |
1258 | strcpy (dfsm->cpg_group_name.value, group_name); | |
1259 | dfsm->cpg_group_name.length = strlen (group_name) + 1; | |
1260 | ||
1261 | dfsm->cpg_callbacks = &cpg_callbacks; | |
1262 | dfsm->dfsm_callbacks = callbacks; | |
1263 | ||
1264 | dfsm->members = g_hash_table_new(dfsm_sync_info_hash, dfsm_sync_info_equal); | |
1265 | if (!dfsm->members) | |
1266 | goto err; | |
1267 | ||
89fde9ac | 1268 | g_mutex_init(&dfsm->mode_mutex); |
fe000966 DM |
1269 | |
1270 | return dfsm; | |
1271 | ||
1272 | err: | |
1273 | dfsm_destroy(dfsm); | |
1274 | return NULL; | |
1275 | } | |
1276 | ||
af2e9dd4 DM |
1277 | gboolean |
1278 | dfsm_is_initialized(dfsm_t *dfsm) | |
1279 | { | |
1280 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1281 | ||
1282 | return (dfsm->cpg_handle != 0) ? TRUE : FALSE; | |
1283 | } | |
1284 | ||
fe000966 DM |
1285 | gboolean |
1286 | dfsm_lowest_nodeid(dfsm_t *dfsm) | |
1287 | { | |
1288 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1289 | ||
1290 | if (dfsm->lowest_nodeid && (dfsm->lowest_nodeid == dfsm->nodeid)) | |
1291 | return TRUE; | |
1292 | ||
1293 | return FALSE; | |
1294 | } | |
1295 | ||
1296 | cs_error_t | |
1297 | dfsm_verify_request(dfsm_t *dfsm) | |
1298 | { | |
1299 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1300 | ||
1301 | /* only do when we have lowest nodeid */ | |
1302 | if (!dfsm->lowest_nodeid || (dfsm->lowest_nodeid != dfsm->nodeid)) | |
1303 | return CS_OK; | |
1304 | ||
1305 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1306 | if (mode != DFSM_MODE_SYNCED) | |
1307 | return CS_OK; | |
1308 | ||
1309 | int len = 1; | |
1310 | struct iovec iov[len]; | |
1311 | ||
1312 | if (dfsm->csum_counter != dfsm->csum_id) { | |
e5a5a3ea | 1313 | g_message("delay verify request %016" PRIX64, dfsm->csum_counter + 1); |
fe000966 DM |
1314 | return CS_OK; |
1315 | }; | |
1316 | ||
1317 | dfsm->csum_counter++; | |
1318 | iov[0].iov_base = (char *)&dfsm->csum_counter; | |
1319 | iov[0].iov_len = sizeof(dfsm->csum_counter); | |
1320 | ||
e5a5a3ea | 1321 | cfs_debug("send verify request %016" PRIX64, dfsm->csum_counter); |
fe000966 DM |
1322 | |
1323 | cs_error_t result; | |
1324 | result = dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_VERIFY_REQUEST, iov, len); | |
1325 | ||
1326 | if (result != CS_OK) | |
1327 | cfs_dom_critical(dfsm->log_domain, "failed to send VERIFY_REQUEST message"); | |
1328 | ||
1329 | return result; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | cs_error_t | |
1334 | dfsm_dispatch( | |
1335 | dfsm_t *dfsm, | |
1336 | cs_dispatch_flags_t dispatch_types) | |
1337 | { | |
1338 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1339 | g_return_val_if_fail(dfsm->cpg_handle != 0, CS_ERR_INVALID_PARAM); | |
1340 | ||
1341 | cs_error_t result; | |
1342 | ||
1343 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1344 | int retries = 0; | |
1345 | loop: | |
1346 | result = cpg_dispatch(dfsm->cpg_handle, dispatch_types); | |
89fde9ac | 1347 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
1348 | nanosleep(&tvreq, NULL); |
1349 | ++retries; | |
1350 | if ((retries % 10) == 0) | |
1351 | cfs_dom_message(dfsm->log_domain, "cpg_dispatch retry %d", retries); | |
1352 | goto loop; | |
1353 | } | |
1354 | ||
1355 | if (!(result == CS_OK || result == CS_ERR_TRY_AGAIN)) { | |
1356 | cfs_dom_critical(dfsm->log_domain, "cpg_dispatch failed: %d", result); | |
1357 | } | |
1358 | ||
1359 | return result; | |
1360 | } | |
1361 | ||
1362 | ||
1363 | cs_error_t | |
1364 | dfsm_initialize(dfsm_t *dfsm, int *fd) | |
1365 | { | |
1366 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1367 | g_return_val_if_fail(fd != NULL, CS_ERR_INVALID_PARAM); | |
1368 | ||
1369 | /* remove old messages */ | |
1370 | dfsm_free_message_queue(dfsm); | |
1371 | dfsm_send_sync_message_abort(dfsm); | |
1372 | ||
1373 | dfsm->joined = FALSE; | |
1374 | dfsm->we_are_member = 0; | |
1375 | ||
1376 | dfsm_set_mode(dfsm, DFSM_MODE_START); | |
1377 | ||
1378 | cs_error_t result; | |
1379 | ||
1380 | if (dfsm->cpg_handle == 0) { | |
1381 | if ((result = cpg_initialize(&dfsm->cpg_handle, dfsm->cpg_callbacks)) != CS_OK) { | |
1382 | cfs_dom_critical(dfsm->log_domain, "cpg_initialize failed: %d", result); | |
751a3b88 | 1383 | goto err_no_finalize; |
fe000966 DM |
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); | |
751a3b88 | 1388 | goto err_finalize; |
fe000966 DM |
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); | |
751a3b88 | 1396 | goto err_finalize; |
fe000966 DM |
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); | |
751a3b88 | 1403 | goto err_finalize; |
fe000966 DM |
1404 | } |
1405 | ||
1406 | return CS_OK; | |
1407 | ||
751a3b88 TL |
1408 | err_finalize: |
1409 | cpg_finalize(dfsm->cpg_handle); | |
1410 | err_no_finalize: | |
fe000966 DM |
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); | |
89fde9ac | 1428 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
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); | |
89fde9ac | 1457 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
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 | ||
89fde9ac | 1507 | g_mutex_clear (&dfsm->mode_mutex); |
fe000966 | 1508 | |
89fde9ac | 1509 | g_mutex_clear (&dfsm->sync_mutex); |
fe000966 | 1510 | |
89fde9ac | 1511 | g_cond_clear (&dfsm->sync_cond); |
fe000966 DM |
1512 | |
1513 | if (dfsm->results) | |
1514 | g_hash_table_destroy(dfsm->results); | |
1515 | ||
1516 | if (dfsm->msg_queue) { | |
1517 | dfsm_free_message_queue(dfsm); | |
1518 | g_sequence_free(dfsm->msg_queue); | |
1519 | } | |
1520 | ||
1521 | if (dfsm->sync_info) | |
1522 | g_free(dfsm->sync_info); | |
1523 | ||
1524 | if (dfsm->cpg_handle) | |
1525 | cpg_finalize(dfsm->cpg_handle); | |
1526 | ||
1527 | if (dfsm->members) | |
1528 | g_hash_table_destroy(dfsm->members); | |
1529 | ||
fe000966 DM |
1530 | g_free(dfsm); |
1531 | } | |
1532 | ||
1533 | typedef struct { | |
1534 | dfsm_t *dfsm; | |
1535 | } service_dfsm_private_t; | |
1536 | ||
1537 | static gboolean | |
1538 | service_dfsm_finalize( | |
1539 | cfs_service_t *service, | |
1540 | gpointer context) | |
1541 | { | |
1542 | g_return_val_if_fail(service != NULL, FALSE); | |
1543 | g_return_val_if_fail(context != NULL, FALSE); | |
1544 | ||
1545 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1546 | dfsm_t *dfsm = private->dfsm; | |
1547 | ||
1548 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1549 | ||
1550 | return dfsm_finalize(dfsm); | |
1551 | } | |
1552 | ||
1553 | static int | |
1554 | service_dfsm_initialize( | |
1555 | cfs_service_t *service, | |
1556 | gpointer context) | |
1557 | { | |
1558 | g_return_val_if_fail(service != NULL, -1); | |
1559 | g_return_val_if_fail(context != NULL, -1); | |
1560 | ||
1561 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1562 | dfsm_t *dfsm = private->dfsm; | |
1563 | ||
1564 | g_return_val_if_fail(dfsm != NULL, -1); | |
1565 | ||
1566 | /* serious internal error - don't try to recover */ | |
1567 | if (!dfsm_restartable(dfsm)) | |
1568 | return -1; | |
1569 | ||
1570 | int fd = -1; | |
1571 | ||
1572 | cs_error_t result; | |
1573 | if ((result = dfsm_initialize(dfsm, &fd)) != CS_OK) | |
1574 | return -1; | |
1575 | ||
1576 | result = dfsm_join(dfsm); | |
1577 | if (result != CS_OK) { | |
1578 | /* we can't dispatch if not joined, so we need to finalize */ | |
1579 | dfsm_finalize(dfsm); | |
1580 | return -1; | |
1581 | } | |
1582 | ||
1583 | return fd; | |
1584 | } | |
1585 | ||
1586 | static gboolean | |
1587 | service_dfsm_dispatch( | |
1588 | cfs_service_t *service, | |
1589 | gpointer context) | |
1590 | { | |
1591 | g_return_val_if_fail(service != NULL, FALSE); | |
1592 | g_return_val_if_fail(context != NULL, FALSE); | |
1593 | ||
1594 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1595 | dfsm_t *dfsm = private->dfsm; | |
1596 | ||
1597 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1598 | g_return_val_if_fail(dfsm->cpg_handle != 0, FALSE); | |
1599 | ||
1600 | cs_error_t result; | |
1601 | ||
89fde9ac | 1602 | result = dfsm_dispatch(dfsm, CS_DISPATCH_ONE); |
fe000966 DM |
1603 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) |
1604 | goto finalize; | |
1605 | if (result != CS_OK) | |
1606 | goto fail; | |
1607 | ||
1608 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1609 | if (mode >= DFSM_ERROR_MODE_START) { | |
1610 | if (dfsm->joined) { | |
1611 | result = dfsm_leave(dfsm); | |
1612 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) | |
1613 | goto finalize; | |
1614 | if (result != CS_OK) | |
1615 | goto finalize; | |
1616 | } else { | |
1617 | if (!dfsm->we_are_member) | |
1618 | return FALSE; | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | return TRUE; | |
1623 | ||
751a3b88 TL |
1624 | finalize: |
1625 | dfsm_finalize(dfsm); | |
fe000966 DM |
1626 | fail: |
1627 | cfs_service_set_restartable(service, dfsm_restartable(dfsm)); | |
1628 | return FALSE; | |
fe000966 DM |
1629 | } |
1630 | ||
1631 | static void | |
1632 | service_dfsm_timer( | |
1633 | cfs_service_t *service, | |
1634 | gpointer context) | |
1635 | { | |
1636 | g_return_if_fail(service != NULL); | |
1637 | g_return_if_fail(context != NULL); | |
1638 | ||
1639 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1640 | dfsm_t *dfsm = private->dfsm; | |
1641 | ||
1642 | g_return_if_fail(dfsm != NULL); | |
1643 | ||
1644 | dfsm_verify_request(dfsm); | |
1645 | } | |
1646 | ||
1647 | static cfs_service_callbacks_t cfs_dfsm_callbacks = { | |
1648 | .cfs_service_initialize_fn = service_dfsm_initialize, | |
1649 | .cfs_service_finalize_fn = service_dfsm_finalize, | |
1650 | .cfs_service_dispatch_fn = service_dfsm_dispatch, | |
1651 | .cfs_service_timer_fn = service_dfsm_timer, | |
1652 | }; | |
1653 | ||
1654 | cfs_service_t * | |
1655 | service_dfsm_new(dfsm_t *dfsm) | |
1656 | { | |
1657 | cfs_service_t *service; | |
1658 | ||
1659 | g_return_val_if_fail(dfsm != NULL, NULL); | |
1660 | ||
1661 | service_dfsm_private_t *private = g_new0(service_dfsm_private_t, 1); | |
1662 | if (!private) | |
1663 | return NULL; | |
1664 | ||
1665 | private->dfsm = dfsm; | |
1666 | ||
1667 | service = cfs_service_new(&cfs_dfsm_callbacks, dfsm->log_domain, private); | |
1668 | ||
1669 | return service; | |
1670 | } | |
1671 | ||
1672 | void | |
1673 | service_dfsm_destroy(cfs_service_t *service) | |
1674 | { | |
1675 | g_return_if_fail(service != NULL); | |
1676 | ||
1677 | service_dfsm_private_t *private = | |
1678 | (service_dfsm_private_t *)cfs_service_get_context(service); | |
1679 | ||
1680 | g_free(private); | |
1681 | g_free(service); | |
1682 | } | |
1683 | ||
1684 | ||
1685 | ||
1686 |