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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 */ | |
89fde9ac | 120 | GMutex mode_mutex; |
fe000966 DM |
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 */ | |
89fde9ac DM |
132 | GMutex sync_mutex; |
133 | GCond sync_cond; | |
fe000966 DM |
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); | |
fe000966 | 164 | |
89fde9ac | 165 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 | 166 | dfsm->msgcount_rcvd = dfsm->msgcount; |
89fde9ac DM |
167 | g_cond_broadcast (&dfsm->sync_cond); |
168 | g_mutex_unlock (&dfsm->sync_mutex); | |
fe000966 DM |
169 | } |
170 | ||
171 | static void | |
172 | dfsm_record_local_result( | |
173 | dfsm_t *dfsm, | |
174 | uint64_t msg_count, | |
175 | int msg_result, | |
176 | gboolean processed) | |
177 | { | |
178 | g_return_if_fail(dfsm != NULL); | |
fe000966 DM |
179 | g_return_if_fail(dfsm->results != NULL); |
180 | ||
89fde9ac | 181 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
182 | dfsm_result_t *rp = (dfsm_result_t *)g_hash_table_lookup(dfsm->results, &msg_count); |
183 | if (rp) { | |
184 | rp->result = msg_result; | |
185 | rp->processed = processed; | |
186 | } | |
187 | dfsm->msgcount_rcvd = msg_count; | |
89fde9ac DM |
188 | g_cond_broadcast (&dfsm->sync_cond); |
189 | g_mutex_unlock (&dfsm->sync_mutex); | |
fe000966 DM |
190 | } |
191 | ||
89fde9ac | 192 | static cs_error_t |
fe000966 DM |
193 | dfsm_send_message_full( |
194 | dfsm_t *dfsm, | |
195 | struct iovec *iov, | |
196 | unsigned int len, | |
197 | int retry) | |
198 | { | |
199 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
200 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
201 | ||
202 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
89fde9ac | 203 | cs_error_t result; |
fe000966 DM |
204 | int retries = 0; |
205 | loop: | |
206 | result = cpg_mcast_joined(dfsm->cpg_handle, CPG_TYPE_AGREED, iov, len); | |
89fde9ac | 207 | if (retry && result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
208 | nanosleep(&tvreq, NULL); |
209 | ++retries; | |
210 | if ((retries % 10) == 0) | |
211 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retry %d", retries); | |
212 | if (retries < 100) | |
213 | goto loop; | |
214 | } | |
215 | ||
216 | if (retries) | |
217 | cfs_dom_message(dfsm->log_domain, "cpg_send_message retried %d times", retries); | |
218 | ||
219 | if (result != CS_OK && | |
89fde9ac | 220 | (!retry || result != CS_ERR_TRY_AGAIN)) |
fe000966 DM |
221 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); |
222 | ||
223 | return result; | |
224 | } | |
225 | ||
89fde9ac | 226 | static cs_error_t |
fe000966 DM |
227 | dfsm_send_state_message_full( |
228 | dfsm_t *dfsm, | |
229 | uint16_t type, | |
230 | struct iovec *iov, | |
231 | unsigned int len) | |
232 | { | |
233 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
234 | g_return_val_if_fail(DFSM_VALID_STATE_MESSAGE(type), CS_ERR_INVALID_PARAM); | |
235 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); | |
236 | ||
237 | dfsm_message_state_header_t header; | |
238 | header.base.type = type; | |
239 | header.base.subtype = 0; | |
240 | header.base.protocol_version = dfsm->protocol_version; | |
241 | header.base.time = time(NULL); | |
242 | header.base.reserved = 0; | |
243 | ||
244 | header.epoch = dfsm->sync_epoch; | |
245 | ||
246 | struct iovec real_iov[len + 1]; | |
247 | ||
248 | real_iov[0].iov_base = (char *)&header; | |
249 | real_iov[0].iov_len = sizeof(header); | |
250 | ||
251 | for (int i = 0; i < len; i++) | |
252 | real_iov[i + 1] = iov[i]; | |
253 | ||
254 | return dfsm_send_message_full(dfsm, real_iov, len + 1, 1); | |
255 | } | |
256 | ||
89fde9ac | 257 | cs_error_t |
fe000966 DM |
258 | dfsm_send_update( |
259 | dfsm_t *dfsm, | |
260 | struct iovec *iov, | |
261 | unsigned int len) | |
262 | { | |
263 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE, iov, len); | |
264 | } | |
265 | ||
89fde9ac | 266 | cs_error_t |
fe000966 DM |
267 | dfsm_send_update_complete(dfsm_t *dfsm) |
268 | { | |
269 | return dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_UPDATE_COMPLETE, NULL, 0); | |
270 | } | |
271 | ||
272 | ||
89fde9ac | 273 | cs_error_t |
fe000966 DM |
274 | dfsm_send_message( |
275 | dfsm_t *dfsm, | |
276 | uint16_t msgtype, | |
277 | struct iovec *iov, | |
278 | int len) | |
279 | { | |
280 | return dfsm_send_message_sync(dfsm, msgtype, iov, len, NULL); | |
281 | } | |
282 | ||
89fde9ac | 283 | cs_error_t |
fe000966 DM |
284 | dfsm_send_message_sync( |
285 | dfsm_t *dfsm, | |
286 | uint16_t msgtype, | |
287 | struct iovec *iov, | |
288 | int len, | |
289 | dfsm_result_t *rp) | |
290 | { | |
291 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
fe000966 DM |
292 | g_return_val_if_fail(!len || iov != NULL, CS_ERR_INVALID_PARAM); |
293 | ||
89fde9ac | 294 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
295 | /* note: hold lock until message is sent - to guarantee ordering */ |
296 | uint64_t msgcount = ++dfsm->msgcount; | |
297 | if (rp) { | |
298 | rp->msgcount = msgcount; | |
299 | rp->processed = 0; | |
300 | g_hash_table_replace(dfsm->results, &rp->msgcount, rp); | |
301 | } | |
302 | ||
303 | dfsm_message_normal_header_t header; | |
304 | header.base.type = DFSM_MESSAGE_NORMAL; | |
305 | header.base.subtype = msgtype; | |
306 | header.base.protocol_version = dfsm->protocol_version; | |
307 | header.base.time = time(NULL); | |
308 | header.base.reserved = 0; | |
309 | header.count = msgcount; | |
310 | ||
311 | struct iovec real_iov[len + 1]; | |
312 | ||
313 | real_iov[0].iov_base = (char *)&header; | |
314 | real_iov[0].iov_len = sizeof(header); | |
315 | ||
316 | for (int i = 0; i < len; i++) | |
317 | real_iov[i + 1] = iov[i]; | |
318 | ||
89fde9ac | 319 | cs_error_t result = dfsm_send_message_full(dfsm, real_iov, len + 1, 1); |
fe000966 | 320 | |
89fde9ac | 321 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
322 | |
323 | if (result != CS_OK) { | |
324 | cfs_dom_critical(dfsm->log_domain, "cpg_send_message failed: %d", result); | |
325 | ||
326 | if (rp) { | |
89fde9ac | 327 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 | 328 | g_hash_table_remove(dfsm->results, &rp->msgcount); |
89fde9ac | 329 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
330 | } |
331 | return result; | |
332 | } | |
333 | ||
334 | if (rp) { | |
89fde9ac | 335 | g_mutex_lock (&dfsm->sync_mutex); |
fe000966 DM |
336 | |
337 | while (dfsm->msgcount_rcvd < msgcount) | |
89fde9ac | 338 | g_cond_wait (&dfsm->sync_cond, &dfsm->sync_mutex); |
fe000966 DM |
339 | |
340 | ||
341 | g_hash_table_remove(dfsm->results, &rp->msgcount); | |
342 | ||
89fde9ac | 343 | g_mutex_unlock (&dfsm->sync_mutex); |
fe000966 DM |
344 | |
345 | return rp->processed ? CS_OK : CS_ERR_FAILED_OPERATION; | |
346 | } | |
347 | ||
348 | return CS_OK; | |
349 | } | |
350 | ||
351 | static gboolean | |
352 | dfsm_send_checksum(dfsm_t *dfsm) | |
353 | { | |
354 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
355 | ||
356 | int len = 2; | |
357 | struct iovec iov[len]; | |
358 | ||
359 | iov[0].iov_base = (char *)&dfsm->csum_id; | |
360 | iov[0].iov_len = sizeof(dfsm->csum_id); | |
361 | iov[1].iov_base = dfsm->csum; | |
362 | iov[1].iov_len = sizeof(dfsm->csum); | |
363 | ||
364 | gboolean res = (dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_VERIFY, iov, len) == CS_OK); | |
365 | ||
366 | return res; | |
367 | } | |
368 | ||
369 | static void | |
370 | dfsm_free_queue_entry(gpointer data) | |
371 | { | |
372 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)data; | |
373 | g_free (qm->msg); | |
374 | g_free (qm); | |
375 | } | |
376 | ||
377 | static void | |
378 | dfsm_free_message_queue(dfsm_t *dfsm) | |
379 | { | |
380 | g_return_if_fail(dfsm != NULL); | |
381 | g_return_if_fail(dfsm->msg_queue != NULL); | |
382 | ||
383 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
384 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
385 | while (iter != end) { | |
386 | GSequenceIter *cur = iter; | |
387 | iter = g_sequence_iter_next(iter); | |
388 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
389 | g_sequence_get(cur); | |
390 | dfsm_free_queue_entry(qm); | |
391 | g_sequence_remove(cur); | |
392 | } | |
393 | } | |
394 | ||
395 | static void | |
396 | dfsm_free_sync_queue(dfsm_t *dfsm) | |
397 | { | |
398 | g_return_if_fail(dfsm != NULL); | |
399 | ||
400 | GList *iter = dfsm->sync_queue; | |
401 | while (iter) { | |
402 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
403 | iter = g_list_next(iter); | |
404 | dfsm_free_queue_entry(qm); | |
405 | } | |
406 | ||
407 | g_list_free(dfsm->sync_queue); | |
408 | dfsm->sync_queue = NULL; | |
409 | } | |
410 | ||
411 | static gint | |
412 | message_queue_sort_fn( | |
413 | gconstpointer a, | |
414 | gconstpointer b, | |
415 | gpointer user_data) | |
416 | { | |
417 | return ((dfsm_queued_message_t *)a)->msg_count - | |
418 | ((dfsm_queued_message_t *)b)->msg_count; | |
419 | } | |
420 | ||
421 | static dfsm_node_info_t * | |
422 | dfsm_node_info_lookup( | |
423 | dfsm_t *dfsm, | |
424 | uint32_t nodeid, | |
425 | uint32_t pid) | |
426 | { | |
427 | g_return_val_if_fail(dfsm != NULL, NULL); | |
428 | g_return_val_if_fail(dfsm->members != NULL, NULL); | |
429 | ||
430 | dfsm_node_info_t info = { .nodeid = nodeid, .pid = pid }; | |
431 | ||
432 | return (dfsm_node_info_t *)g_hash_table_lookup(dfsm->members, &info); | |
433 | } | |
434 | ||
435 | static dfsm_queued_message_t * | |
436 | dfsm_queue_add_message( | |
437 | dfsm_t *dfsm, | |
438 | uint32_t nodeid, | |
439 | uint32_t pid, | |
440 | uint64_t msg_count, | |
441 | const void *msg, | |
442 | size_t msg_len) | |
443 | { | |
444 | g_return_val_if_fail(dfsm != NULL, NULL); | |
445 | g_return_val_if_fail(msg != NULL, NULL); | |
446 | g_return_val_if_fail(msg_len != 0, NULL); | |
447 | ||
448 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, nodeid, pid); | |
449 | if (!ni) { | |
450 | cfs_dom_critical(dfsm->log_domain, "dfsm_node_info_lookup failed"); | |
451 | return NULL; | |
452 | } | |
453 | ||
454 | dfsm_queued_message_t *qm = g_new0(dfsm_queued_message_t, 1); | |
455 | g_return_val_if_fail(qm != NULL, NULL); | |
456 | ||
457 | qm->nodeid = nodeid; | |
458 | qm->pid = pid; | |
459 | qm->msg = g_memdup (msg, msg_len); | |
460 | qm->msg_len = msg_len; | |
461 | qm->msg_count = msg_count; | |
462 | ||
463 | if (dfsm->mode == DFSM_MODE_UPDATE && ni->synced) { | |
464 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
465 | } else { | |
466 | /* NOTE: we only need to sort the queue because we resend all | |
467 | * queued messages sometimes. | |
468 | */ | |
469 | g_sequence_insert_sorted(dfsm->msg_queue, qm, message_queue_sort_fn, NULL); | |
470 | } | |
471 | ||
472 | return qm; | |
473 | } | |
474 | ||
475 | static guint | |
476 | dfsm_sync_info_hash(gconstpointer key) | |
477 | { | |
478 | dfsm_node_info_t *info = (dfsm_node_info_t *)key; | |
479 | ||
480 | return g_int_hash(&info->nodeid) + g_int_hash(&info->pid); | |
481 | } | |
482 | ||
483 | static gboolean | |
484 | dfsm_sync_info_equal( | |
485 | gconstpointer v1, | |
486 | gconstpointer v2) | |
487 | { | |
488 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
489 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
490 | ||
491 | if (info1->nodeid == info2->nodeid && | |
492 | info1->pid == info2->pid) | |
493 | return TRUE; | |
494 | ||
495 | return FALSE; | |
496 | } | |
497 | ||
498 | static int | |
499 | dfsm_sync_info_compare( | |
500 | gconstpointer v1, | |
501 | gconstpointer v2) | |
502 | { | |
503 | dfsm_node_info_t *info1 = (dfsm_node_info_t *)v1; | |
504 | dfsm_node_info_t *info2 = (dfsm_node_info_t *)v2; | |
505 | ||
506 | if (info1->nodeid != info2->nodeid) | |
507 | return info1->nodeid - info2->nodeid; | |
508 | ||
509 | return info1->pid - info2->pid; | |
510 | } | |
511 | ||
512 | static void | |
513 | dfsm_set_mode( | |
514 | dfsm_t *dfsm, | |
515 | dfsm_mode_t new_mode) | |
516 | { | |
517 | g_return_if_fail(dfsm != NULL); | |
518 | ||
519 | cfs_debug("dfsm_set_mode - set mode to %d", new_mode); | |
520 | ||
521 | int changed = 0; | |
89fde9ac | 522 | g_mutex_lock (&dfsm->mode_mutex); |
fe000966 DM |
523 | if (dfsm->mode != new_mode) { |
524 | if (new_mode < DFSM_ERROR_MODE_START || | |
525 | (dfsm->mode < DFSM_ERROR_MODE_START || new_mode >= dfsm->mode)) { | |
526 | dfsm->mode = new_mode; | |
527 | changed = 1; | |
528 | } | |
529 | } | |
89fde9ac | 530 | g_mutex_unlock (&dfsm->mode_mutex); |
fe000966 DM |
531 | |
532 | if (!changed) | |
533 | return; | |
534 | ||
535 | if (new_mode == DFSM_MODE_START) { | |
536 | cfs_dom_message(dfsm->log_domain, "start cluster connection"); | |
537 | } else if (new_mode == DFSM_MODE_START_SYNC) { | |
538 | cfs_dom_message(dfsm->log_domain, "starting data syncronisation"); | |
539 | } else if (new_mode == DFSM_MODE_SYNCED) { | |
540 | cfs_dom_message(dfsm->log_domain, "all data is up to date"); | |
541 | if (dfsm->dfsm_callbacks->dfsm_synced_fn) | |
542 | dfsm->dfsm_callbacks->dfsm_synced_fn(dfsm); | |
543 | } else if (new_mode == DFSM_MODE_UPDATE) { | |
544 | cfs_dom_message(dfsm->log_domain, "waiting for updates from leader"); | |
545 | } else if (new_mode == DFSM_MODE_LEAVE) { | |
546 | cfs_dom_critical(dfsm->log_domain, "leaving CPG group"); | |
547 | } else if (new_mode == DFSM_MODE_ERROR) { | |
548 | cfs_dom_critical(dfsm->log_domain, "serious internal error - stop cluster connection"); | |
549 | } else if (new_mode == DFSM_MODE_VERSION_ERROR) { | |
550 | cfs_dom_critical(dfsm->log_domain, "detected newer protocol - please update this node"); | |
551 | } | |
552 | } | |
553 | ||
554 | static dfsm_mode_t | |
555 | dfsm_get_mode(dfsm_t *dfsm) | |
556 | { | |
557 | g_return_val_if_fail(dfsm != NULL, DFSM_MODE_ERROR); | |
558 | ||
89fde9ac | 559 | g_mutex_lock (&dfsm->mode_mutex); |
fe000966 | 560 | dfsm_mode_t mode = dfsm->mode; |
89fde9ac | 561 | g_mutex_unlock (&dfsm->mode_mutex); |
fe000966 DM |
562 | |
563 | return mode; | |
564 | } | |
565 | ||
566 | gboolean | |
567 | dfsm_restartable(dfsm_t *dfsm) | |
568 | { | |
569 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
570 | ||
571 | return !(mode == DFSM_MODE_ERROR || | |
572 | mode == DFSM_MODE_VERSION_ERROR); | |
573 | } | |
574 | ||
575 | void | |
576 | dfsm_set_errormode(dfsm_t *dfsm) | |
577 | { | |
578 | dfsm_set_mode(dfsm, DFSM_MODE_ERROR); | |
579 | } | |
580 | ||
581 | static void | |
582 | dfsm_release_sync_resources( | |
583 | dfsm_t *dfsm, | |
584 | const struct cpg_address *member_list, | |
585 | size_t member_list_entries) | |
586 | { | |
587 | g_return_if_fail(dfsm != NULL); | |
588 | g_return_if_fail(dfsm->members != NULL); | |
589 | g_return_if_fail(!member_list_entries || member_list != NULL); | |
590 | ||
591 | cfs_debug("enter dfsm_release_sync_resources"); | |
592 | ||
593 | if (dfsm->sync_info) { | |
594 | ||
595 | if (dfsm->sync_info->data && dfsm->dfsm_callbacks->dfsm_cleanup_fn) { | |
596 | dfsm->dfsm_callbacks->dfsm_cleanup_fn(dfsm, dfsm->data, dfsm->sync_info); | |
597 | dfsm->sync_info->data = NULL; | |
598 | } | |
599 | ||
600 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
601 | if (dfsm->sync_info->nodes[i].state) { | |
602 | g_free(dfsm->sync_info->nodes[i].state); | |
603 | dfsm->sync_info->nodes[i].state = NULL; | |
604 | dfsm->sync_info->nodes[i].state_len = 0; | |
605 | } | |
606 | } | |
607 | } | |
608 | ||
609 | if (member_list) { | |
610 | ||
611 | g_hash_table_remove_all(dfsm->members); | |
612 | ||
613 | if (dfsm->sync_info) | |
614 | g_free(dfsm->sync_info); | |
615 | ||
616 | int size = sizeof(dfsm_sync_info_t) + | |
617 | member_list_entries*sizeof(dfsm_sync_info_t); | |
618 | dfsm_sync_info_t *sync_info = dfsm->sync_info = g_malloc0(size); | |
619 | sync_info->node_count = member_list_entries; | |
620 | ||
621 | for (int i = 0; i < member_list_entries; i++) { | |
622 | sync_info->nodes[i].nodeid = member_list[i].nodeid; | |
623 | sync_info->nodes[i].pid = member_list[i].pid; | |
624 | } | |
625 | ||
626 | qsort(sync_info->nodes, member_list_entries, sizeof(dfsm_node_info_t), | |
627 | dfsm_sync_info_compare); | |
628 | ||
629 | for (int i = 0; i < member_list_entries; i++) { | |
630 | dfsm_node_info_t *info = &sync_info->nodes[i]; | |
631 | g_hash_table_insert(dfsm->members, info, info); | |
632 | if (info->nodeid == dfsm->nodeid && info->pid == dfsm->pid) | |
633 | sync_info->local = info; | |
634 | } | |
635 | } | |
636 | } | |
637 | ||
638 | static void | |
639 | dfsm_cpg_deliver_callback( | |
640 | cpg_handle_t handle, | |
641 | const struct cpg_name *group_name, | |
642 | uint32_t nodeid, | |
643 | uint32_t pid, | |
644 | void *msg, | |
645 | size_t msg_len) | |
646 | { | |
647 | cs_error_t result; | |
648 | ||
649 | dfsm_t *dfsm = NULL; | |
650 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
651 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
652 | cfs_critical("cpg_context_get error: %d (%p)", result, dfsm); | |
653 | return; /* we have no valid dfsm pointer, so we can just ignore this */ | |
654 | } | |
655 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
656 | ||
657 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
658 | ||
659 | if (mode >= DFSM_ERROR_MODE_START) { | |
660 | cfs_dom_debug(dfsm->log_domain, "error mode - ignoring message"); | |
661 | goto leave; | |
662 | } | |
663 | ||
664 | if (!dfsm->sync_info) { | |
665 | cfs_dom_critical(dfsm->log_domain, "no dfsm_sync_info - internal error"); | |
666 | goto leave; | |
667 | } | |
668 | ||
669 | if (msg_len < sizeof(dfsm_message_header_t)) { | |
670 | cfs_dom_critical(dfsm->log_domain, "received short message (%ld bytes)", msg_len); | |
671 | goto leave; | |
672 | } | |
673 | ||
674 | dfsm_message_header_t *base_header = (dfsm_message_header_t *)msg; | |
675 | ||
676 | if (base_header->protocol_version > dfsm->protocol_version) { | |
677 | cfs_dom_critical(dfsm->log_domain, "received message with protocol version %d", | |
678 | base_header->protocol_version); | |
679 | dfsm_set_mode(dfsm, DFSM_MODE_VERSION_ERROR); | |
680 | return; | |
681 | } else if (base_header->protocol_version < dfsm->protocol_version) { | |
682 | cfs_dom_message(dfsm->log_domain, "ignore message with wrong protocol version %d", | |
683 | base_header->protocol_version); | |
684 | return; | |
685 | } | |
686 | ||
687 | if (base_header->type == DFSM_MESSAGE_NORMAL) { | |
688 | ||
689 | dfsm_message_normal_header_t *header = (dfsm_message_normal_header_t *)msg; | |
690 | ||
691 | if (msg_len < sizeof(dfsm_message_normal_header_t)) { | |
692 | cfs_dom_critical(dfsm->log_domain, "received short message (type = %d, subtype = %d, %ld bytes)", | |
693 | base_header->type, base_header->subtype, msg_len); | |
694 | goto leave; | |
695 | } | |
696 | ||
697 | if (mode != DFSM_MODE_SYNCED) { | |
698 | cfs_dom_debug(dfsm->log_domain, "queue message %zu (subtype = %d, length = %ld)", | |
699 | header->count, base_header->subtype, msg_len); | |
700 | ||
701 | if (!dfsm_queue_add_message(dfsm, nodeid, pid, header->count, msg, msg_len)) | |
702 | goto leave; | |
703 | } else { | |
704 | ||
705 | int msg_res = -1; | |
706 | int res = dfsm->dfsm_callbacks->dfsm_deliver_fn( | |
707 | dfsm, dfsm->data, &msg_res, nodeid, pid, base_header->subtype, | |
708 | base_header->time, msg + sizeof(dfsm_message_normal_header_t), | |
709 | msg_len - sizeof(dfsm_message_normal_header_t)); | |
710 | ||
711 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) | |
712 | dfsm_record_local_result(dfsm, header->count, msg_res, res); | |
713 | ||
714 | if (res < 0) | |
715 | goto leave; | |
716 | } | |
717 | ||
718 | return; | |
719 | } | |
720 | ||
721 | /* state related messages | |
722 | * we needs right epoch - else we simply discard the message | |
723 | */ | |
724 | ||
725 | dfsm_message_state_header_t *header = (dfsm_message_state_header_t *)msg; | |
726 | ||
727 | if (msg_len < sizeof(dfsm_message_state_header_t)) { | |
728 | cfs_dom_critical(dfsm->log_domain, "received short state message (type = %d, subtype = %d, %ld bytes)", | |
729 | base_header->type, base_header->subtype, msg_len); | |
730 | goto leave; | |
731 | } | |
732 | ||
733 | if (base_header->type != DFSM_MESSAGE_SYNC_START && | |
734 | (memcmp(&header->epoch, &dfsm->sync_epoch, sizeof(dfsm_sync_epoch_t)) != 0)) { | |
735 | cfs_dom_debug(dfsm->log_domain, "ignore message (msg_type == %d) with " | |
736 | "wrong epoch (epoch %d/%d/%08X)", base_header->type, | |
737 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
738 | return; | |
739 | } | |
740 | ||
741 | msg += sizeof(dfsm_message_state_header_t); | |
742 | msg_len -= sizeof(dfsm_message_state_header_t); | |
743 | ||
744 | if (mode == DFSM_MODE_SYNCED) { | |
745 | if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
746 | ||
747 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
748 | dfsm->sync_info->nodes[i].synced = 1; | |
749 | ||
750 | if (!dfsm_deliver_queue(dfsm)) | |
751 | goto leave; | |
752 | ||
753 | return; | |
754 | ||
755 | } else if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST) { | |
756 | ||
757 | if (msg_len != sizeof(dfsm->csum_counter)) { | |
758 | cfs_dom_critical(dfsm->log_domain, "cpg received verify request with wrong length (%ld bytes) form node %d/%d", msg_len, nodeid, pid); | |
759 | goto leave; | |
760 | } | |
761 | ||
762 | uint64_t csum_id = *((uint64_t *)msg); | |
763 | msg += 8; msg_len -= 8; | |
764 | ||
765 | cfs_dom_debug(dfsm->log_domain, "got verify request from node %d %016zX", nodeid, csum_id); | |
766 | ||
767 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
768 | if (!dfsm->dfsm_callbacks->dfsm_checksum_fn( | |
769 | dfsm, dfsm->data, dfsm->csum, sizeof(dfsm->csum))) { | |
770 | cfs_dom_critical(dfsm->log_domain, "unable to compute data checksum"); | |
771 | goto leave; | |
772 | } | |
773 | ||
774 | dfsm->csum_epoch = header->epoch; | |
775 | dfsm->csum_id = csum_id; | |
776 | ||
777 | if (nodeid == dfsm->nodeid && pid == dfsm->pid) { | |
778 | if (!dfsm_send_checksum(dfsm)) | |
779 | goto leave; | |
780 | } | |
781 | } | |
782 | ||
783 | return; | |
784 | ||
785 | } else if (base_header->type == DFSM_MESSAGE_VERIFY) { | |
786 | ||
787 | cfs_dom_debug(dfsm->log_domain, "received verify message"); | |
788 | ||
789 | if (dfsm->dfsm_callbacks->dfsm_checksum_fn) { | |
790 | ||
791 | if (msg_len != (sizeof(dfsm->csum_id) + sizeof(dfsm->csum))) { | |
792 | cfs_dom_critical(dfsm->log_domain, "cpg received verify message with wrong length (%ld bytes)", msg_len); | |
793 | goto leave; | |
794 | } | |
795 | ||
796 | uint64_t csum_id = *((uint64_t *)msg); | |
797 | msg += 8; msg_len -= 8; | |
798 | ||
799 | if (dfsm->csum_id == csum_id && | |
800 | (memcmp(&dfsm->csum_epoch, &header->epoch, sizeof(dfsm_sync_epoch_t)) == 0)) { | |
801 | if (memcmp(msg, dfsm->csum, sizeof(dfsm->csum)) != 0) { | |
802 | cfs_dom_critical(dfsm->log_domain, "wrong checksum %016zX != %016zX - restarting", | |
803 | *(uint64_t *)msg, *(uint64_t *)dfsm->csum); | |
804 | goto leave; | |
805 | } else { | |
806 | cfs_dom_message(dfsm->log_domain, "data verification successful"); | |
807 | } | |
808 | } else { | |
809 | cfs_dom_message(dfsm->log_domain, "skip verification - no checksum saved"); | |
810 | } | |
811 | } | |
812 | ||
813 | return; | |
814 | ||
815 | } else { | |
816 | /* ignore (we already got all required updates, or we are leader) */ | |
817 | cfs_dom_debug(dfsm->log_domain, "ignore state sync message %d", | |
818 | base_header->type); | |
819 | return; | |
820 | } | |
821 | ||
822 | } else if (mode == DFSM_MODE_START_SYNC) { | |
823 | ||
824 | if (base_header->type == DFSM_MESSAGE_SYNC_START) { | |
825 | ||
826 | if (nodeid != dfsm->lowest_nodeid) { | |
827 | cfs_dom_critical(dfsm->log_domain, "ignore sync request from wrong member %d/%d", | |
828 | nodeid, pid); | |
829 | } | |
830 | ||
831 | cfs_dom_message(dfsm->log_domain, "received sync request (epoch %d/%d/%08X)", | |
832 | header->epoch.nodeid, header->epoch.pid, header->epoch.epoch); | |
833 | ||
834 | dfsm->sync_epoch = header->epoch; | |
835 | ||
836 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
837 | ||
838 | unsigned int state_len = 0; | |
839 | gpointer state = NULL; | |
840 | ||
841 | state = dfsm->dfsm_callbacks->dfsm_get_state_fn(dfsm, dfsm->data, &state_len); | |
842 | ||
843 | if (!(state && state_len)) { | |
844 | cfs_dom_critical(dfsm->log_domain, "dfsm_get_state_fn failed"); | |
845 | goto leave; | |
846 | } | |
847 | ||
848 | struct iovec iov[1]; | |
849 | iov[0].iov_base = state; | |
850 | iov[0].iov_len = state_len; | |
851 | ||
852 | result = dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_STATE, iov, 1); | |
853 | ||
854 | if (state) | |
855 | g_free(state); | |
856 | ||
857 | if (result != CS_OK) | |
858 | goto leave; | |
859 | ||
860 | return; | |
861 | ||
862 | } else if (base_header->type == DFSM_MESSAGE_STATE) { | |
863 | ||
864 | dfsm_node_info_t *ni; | |
865 | ||
866 | if (!(ni = dfsm_node_info_lookup(dfsm, nodeid, pid))) { | |
867 | cfs_dom_critical(dfsm->log_domain, "received state for non-member %d/%d", nodeid, pid); | |
868 | goto leave; | |
869 | } | |
870 | ||
871 | if (ni->state) { | |
872 | cfs_dom_critical(dfsm->log_domain, "received duplicate state for member %d/%d", nodeid, pid); | |
873 | goto leave; | |
874 | } | |
875 | ||
876 | ni->state = g_memdup(msg, msg_len); | |
877 | ni->state_len = msg_len; | |
878 | ||
879 | int received_all = 1; | |
880 | for (int i = 0; i < dfsm->sync_info->node_count; i++) { | |
881 | if (!dfsm->sync_info->nodes[i].state) { | |
882 | received_all = 0; | |
883 | break; | |
884 | } | |
885 | } | |
886 | ||
887 | if (received_all) { | |
888 | cfs_dom_message(dfsm->log_domain, "received all states"); | |
889 | ||
890 | int res = dfsm->dfsm_callbacks->dfsm_process_state_update_fn(dfsm, dfsm->data, dfsm->sync_info); | |
891 | if (res < 0) | |
892 | goto leave; | |
893 | ||
894 | if (dfsm->sync_info->local->synced) { | |
895 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
896 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
897 | ||
898 | if (!dfsm_deliver_queue(dfsm)) | |
899 | goto leave; | |
900 | ||
901 | } else { | |
902 | dfsm_set_mode(dfsm, DFSM_MODE_UPDATE); | |
903 | ||
904 | if (!dfsm_deliver_queue(dfsm)) | |
905 | goto leave; | |
906 | } | |
907 | ||
908 | } | |
909 | ||
910 | return; | |
911 | } | |
912 | ||
913 | } else if (mode == DFSM_MODE_UPDATE) { | |
914 | ||
915 | if (base_header->type == DFSM_MESSAGE_UPDATE) { | |
916 | ||
917 | int res = dfsm->dfsm_callbacks->dfsm_process_update_fn( | |
918 | dfsm, dfsm->data, dfsm->sync_info, nodeid, pid, msg, msg_len); | |
919 | ||
920 | if (res < 0) | |
921 | goto leave; | |
922 | ||
923 | return; | |
924 | ||
925 | } else if (base_header->type == DFSM_MESSAGE_UPDATE_COMPLETE) { | |
926 | ||
927 | ||
928 | int res = dfsm->dfsm_callbacks->dfsm_commit_fn(dfsm, dfsm->data, dfsm->sync_info); | |
929 | ||
930 | if (res < 0) | |
931 | goto leave; | |
932 | ||
933 | for (int i = 0; i < dfsm->sync_info->node_count; i++) | |
934 | dfsm->sync_info->nodes[i].synced = 1; | |
935 | ||
936 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
937 | ||
938 | if (!dfsm_deliver_sync_queue(dfsm)) | |
939 | goto leave; | |
940 | ||
941 | if (!dfsm_deliver_queue(dfsm)) | |
942 | goto leave; | |
943 | ||
944 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
945 | ||
946 | return; | |
947 | } | |
948 | ||
949 | } else { | |
950 | cfs_dom_critical(dfsm->log_domain, "internal error - unknown mode %d", mode); | |
951 | goto leave; | |
952 | } | |
953 | ||
954 | if (base_header->type == DFSM_MESSAGE_VERIFY_REQUEST || | |
955 | base_header->type == DFSM_MESSAGE_VERIFY) { | |
956 | ||
957 | cfs_dom_debug(dfsm->log_domain, "ignore verify message %d while not synced", base_header->type); | |
958 | ||
959 | } else { | |
960 | cfs_dom_critical(dfsm->log_domain, "received unknown state message type (type = %d, %ld bytes)", | |
961 | base_header->type, msg_len); | |
962 | goto leave; | |
963 | } | |
964 | ||
965 | leave: | |
966 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
967 | dfsm_release_sync_resources(dfsm, NULL, 0); | |
968 | return; | |
969 | } | |
970 | ||
971 | static gboolean | |
972 | dfsm_resend_queue(dfsm_t *dfsm) | |
973 | { | |
974 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
975 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
976 | ||
977 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
978 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
979 | gboolean res = TRUE; | |
980 | ||
981 | while (iter != end) { | |
982 | GSequenceIter *cur = iter; | |
983 | iter = g_sequence_iter_next(iter); | |
984 | ||
985 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
986 | g_sequence_get(cur); | |
987 | ||
988 | if (qm->nodeid == dfsm->nodeid && qm->pid == dfsm->pid) { | |
89fde9ac | 989 | cs_error_t result; |
fe000966 DM |
990 | struct iovec iov[1]; |
991 | iov[0].iov_base = qm->msg; | |
992 | iov[0].iov_len = qm->msg_len; | |
993 | ||
994 | if ((result = dfsm_send_message_full(dfsm, iov, 1, 1)) != CS_OK) { | |
995 | res = FALSE; | |
996 | break; | |
997 | } | |
998 | } | |
999 | } | |
1000 | ||
1001 | dfsm_free_message_queue(dfsm); | |
1002 | ||
1003 | return res; | |
1004 | } | |
1005 | ||
1006 | static gboolean | |
1007 | dfsm_deliver_sync_queue(dfsm_t *dfsm) | |
1008 | { | |
1009 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1010 | ||
1011 | if (!dfsm->sync_queue) | |
1012 | return TRUE; | |
1013 | ||
1014 | gboolean res = TRUE; | |
1015 | ||
1016 | // fixme: cfs_debug | |
1017 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, | |
1018 | g_list_length(dfsm->sync_queue)); | |
1019 | ||
1020 | GList *iter = dfsm->sync_queue; | |
1021 | while (iter) { | |
1022 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *)iter->data; | |
1023 | iter = g_list_next(iter); | |
1024 | ||
1025 | if (res && dfsm->mode == DFSM_MODE_SYNCED) { | |
1026 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1027 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1028 | } else { | |
1029 | res = FALSE; | |
1030 | } | |
1031 | ||
1032 | dfsm_free_queue_entry(qm); | |
1033 | } | |
1034 | g_list_free(dfsm->sync_queue); | |
1035 | dfsm->sync_queue = NULL; | |
1036 | ||
1037 | return res; | |
1038 | } | |
1039 | ||
1040 | static gboolean | |
1041 | dfsm_deliver_queue(dfsm_t *dfsm) | |
1042 | { | |
1043 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1044 | g_return_val_if_fail(dfsm->msg_queue != NULL, FALSE); | |
1045 | ||
1046 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1047 | if (!qlen) | |
1048 | return TRUE; | |
1049 | ||
1050 | GSequenceIter *iter = g_sequence_get_begin_iter(dfsm->msg_queue); | |
1051 | GSequenceIter *end = g_sequence_get_end_iter(dfsm->msg_queue); | |
1052 | gboolean res = TRUE; | |
1053 | ||
1054 | // fixme: cfs_debug | |
1055 | cfs_dom_message(dfsm->log_domain, "%s: queue length %d", __func__, qlen); | |
1056 | ||
1057 | while (iter != end) { | |
1058 | GSequenceIter *cur = iter; | |
1059 | iter = g_sequence_iter_next(iter); | |
1060 | ||
1061 | dfsm_queued_message_t *qm = (dfsm_queued_message_t *) | |
1062 | g_sequence_get(cur); | |
1063 | ||
1064 | dfsm_node_info_t *ni = dfsm_node_info_lookup(dfsm, qm->nodeid, qm->pid); | |
1065 | if (!ni) { | |
d3eeade6 | 1066 | cfs_dom_message(dfsm->log_domain, "remove message from non-member %d/%d", |
fe000966 DM |
1067 | qm->nodeid, qm->pid); |
1068 | dfsm_free_queue_entry(qm); | |
1069 | g_sequence_remove(cur); | |
1070 | continue; | |
1071 | } | |
1072 | ||
1073 | if (dfsm->mode == DFSM_MODE_SYNCED) { | |
1074 | if (ni->synced) { | |
1075 | dfsm_cpg_deliver_callback(dfsm->cpg_handle, &dfsm->cpg_group_name, | |
1076 | qm->nodeid, qm->pid, qm->msg, qm->msg_len); | |
1077 | dfsm_free_queue_entry(qm); | |
1078 | g_sequence_remove(cur); | |
1079 | } | |
1080 | } else if (dfsm->mode == DFSM_MODE_UPDATE) { | |
1081 | if (ni->synced) { | |
1082 | dfsm->sync_queue = g_list_append(dfsm->sync_queue, qm); | |
1083 | g_sequence_remove(cur); | |
1084 | } | |
1085 | } else { | |
1086 | res = FALSE; | |
1087 | break; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | return res; | |
1092 | } | |
1093 | ||
1094 | static void | |
1095 | dfsm_cpg_confchg_callback( | |
1096 | cpg_handle_t handle, | |
1097 | const struct cpg_name *group_name, | |
1098 | const struct cpg_address *member_list, | |
1099 | size_t member_list_entries, | |
1100 | const struct cpg_address *left_list, | |
1101 | size_t left_list_entries, | |
1102 | const struct cpg_address *joined_list, | |
1103 | size_t joined_list_entries) | |
1104 | { | |
1105 | cs_error_t result; | |
1106 | ||
1107 | dfsm_t *dfsm = NULL; | |
1108 | result = cpg_context_get(handle, (gpointer *)&dfsm); | |
1109 | if (result != CS_OK || !dfsm || dfsm->cpg_callbacks != &cpg_callbacks) { | |
1110 | cfs_critical("cpg_context_get error: %d (%p)", result, dfsm); | |
1111 | return; /* we have no valid dfsm pointer, so we can just ignore this */ | |
1112 | } | |
1113 | ||
1114 | dfsm->we_are_member = 0; | |
1115 | ||
1116 | /* create new epoch */ | |
1117 | dfsm->local_epoch_counter++; | |
1118 | dfsm->sync_epoch.epoch = dfsm->local_epoch_counter; | |
1119 | dfsm->sync_epoch.nodeid = dfsm->nodeid; | |
1120 | dfsm->sync_epoch.pid = dfsm->pid; | |
1121 | dfsm->sync_epoch.time = time(NULL); | |
1122 | ||
1123 | /* invalidate saved checksum */ | |
1124 | dfsm->csum_id = dfsm->csum_counter; | |
1125 | memset(&dfsm->csum_epoch, 0, sizeof(dfsm->csum_epoch)); | |
1126 | ||
1127 | dfsm_free_sync_queue(dfsm); | |
1128 | ||
1129 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1130 | ||
1131 | cfs_dom_debug(dfsm->log_domain, "dfsm mode is %d", mode); | |
1132 | ||
1133 | if (mode >= DFSM_ERROR_MODE_START) { | |
1134 | cfs_dom_debug(dfsm->log_domain, "already left group - ignore message"); | |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | int lowest_nodeid = 0; | |
1139 | GString *str = g_string_new("members: "); | |
1140 | for (int i = 0; i < member_list_entries; i++) { | |
1141 | ||
1142 | g_string_append_printf(str, i ? ", %d/%d" : "%d/%d", | |
1143 | member_list[i].nodeid, member_list[i].pid); | |
1144 | ||
1145 | if (lowest_nodeid == 0 || lowest_nodeid > member_list[i].nodeid) | |
1146 | lowest_nodeid = member_list[i].nodeid; | |
1147 | ||
1148 | if (member_list[i].nodeid == dfsm->nodeid && | |
1149 | member_list[i].pid == dfsm->pid) | |
1150 | dfsm->we_are_member = 1; | |
1151 | } | |
1152 | ||
1153 | ||
1154 | if ((dfsm->we_are_member || mode != DFSM_MODE_START)) | |
1155 | cfs_dom_message(dfsm->log_domain, str->str); | |
1156 | ||
1157 | g_string_free(str, 1); | |
1158 | ||
1159 | dfsm->lowest_nodeid = lowest_nodeid; | |
1160 | ||
1161 | /* NOTE: one node can be in left and joined list at the same time, | |
1162 | so it is better to query member list. Also JOIN/LEAVE list are | |
1163 | different on different nodes! | |
1164 | */ | |
1165 | ||
1166 | dfsm_release_sync_resources(dfsm, member_list, member_list_entries); | |
1167 | ||
1168 | if (!dfsm->we_are_member) { | |
1169 | if (mode == DFSM_MODE_START) { | |
1170 | cfs_dom_debug(dfsm->log_domain, "ignore leave message"); | |
1171 | return; | |
1172 | } | |
1173 | cfs_dom_message(dfsm->log_domain, "we (%d/%d) left the process group", | |
1174 | dfsm->nodeid, dfsm->pid); | |
1175 | goto leave; | |
1176 | } | |
1177 | ||
1178 | if (member_list_entries > 1) { | |
1179 | ||
1180 | int qlen = g_sequence_get_length(dfsm->msg_queue); | |
1181 | if (joined_list_entries && qlen) { | |
1182 | /* we need to make sure that all members have the same queue. */ | |
1183 | cfs_dom_message(dfsm->log_domain, "queue not emtpy - resening %d messages", qlen); | |
1184 | if (!dfsm_resend_queue(dfsm)) { | |
1185 | cfs_dom_critical(dfsm->log_domain, "dfsm_resend_queue failed"); | |
1186 | goto leave; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | dfsm_set_mode(dfsm, DFSM_MODE_START_SYNC); | |
1191 | if (lowest_nodeid == dfsm->nodeid) { | |
1192 | if (!dfsm_send_state_message_full(dfsm, DFSM_MESSAGE_SYNC_START, NULL, 0)) { | |
1193 | cfs_dom_critical(dfsm->log_domain, "failed to send SYNC_START message"); | |
1194 | goto leave; | |
1195 | } | |
1196 | } | |
1197 | } else { | |
1198 | dfsm_set_mode(dfsm, DFSM_MODE_SYNCED); | |
1199 | dfsm->sync_info->local->synced = 1; | |
1200 | if (!dfsm_deliver_queue(dfsm)) | |
1201 | goto leave; | |
1202 | } | |
1203 | ||
1204 | if (dfsm->dfsm_callbacks->dfsm_confchg_fn) | |
1205 | dfsm->dfsm_callbacks->dfsm_confchg_fn(dfsm, dfsm->data, member_list, member_list_entries); | |
1206 | ||
1207 | return; | |
1208 | leave: | |
1209 | dfsm_set_mode(dfsm, DFSM_MODE_LEAVE); | |
1210 | return; | |
1211 | } | |
1212 | ||
1213 | static cpg_callbacks_t cpg_callbacks = { | |
1214 | .cpg_deliver_fn = dfsm_cpg_deliver_callback, | |
1215 | .cpg_confchg_fn = dfsm_cpg_confchg_callback, | |
1216 | }; | |
1217 | ||
1218 | dfsm_t * | |
1219 | dfsm_new( | |
1220 | gpointer data, | |
1221 | const char *group_name, | |
1222 | const char *log_domain, | |
1223 | guint32 protocol_version, | |
1224 | dfsm_callbacks_t *callbacks) | |
1225 | { | |
1226 | g_return_val_if_fail(sizeof(dfsm_message_header_t) == 16, NULL); | |
1227 | g_return_val_if_fail(sizeof(dfsm_message_state_header_t) == 32, NULL); | |
1228 | g_return_val_if_fail(sizeof(dfsm_message_normal_header_t) == 24, NULL); | |
1229 | ||
1230 | g_return_val_if_fail(callbacks != NULL, NULL); | |
1231 | g_return_val_if_fail(callbacks->dfsm_deliver_fn != NULL, NULL); | |
1232 | ||
1233 | g_return_val_if_fail(callbacks->dfsm_get_state_fn != NULL, NULL); | |
1234 | g_return_val_if_fail(callbacks->dfsm_process_state_update_fn != NULL, NULL); | |
1235 | g_return_val_if_fail(callbacks->dfsm_process_update_fn != NULL, NULL); | |
1236 | g_return_val_if_fail(callbacks->dfsm_commit_fn != NULL, NULL); | |
1237 | ||
1238 | dfsm_t *dfsm; | |
1239 | ||
1240 | if ((dfsm = g_new0(dfsm_t, 1)) == NULL) | |
1241 | return NULL; | |
1242 | ||
89fde9ac DM |
1243 | g_mutex_init(&dfsm->sync_mutex); |
1244 | ||
1245 | g_cond_init(&dfsm->sync_cond); | |
fe000966 DM |
1246 | |
1247 | if (!(dfsm->results = g_hash_table_new(g_int64_hash, g_int64_equal))) | |
1248 | goto err; | |
1249 | ||
1250 | if (!(dfsm->msg_queue = g_sequence_new(NULL))) | |
1251 | goto err; | |
1252 | ||
6392e29a | 1253 | dfsm->log_domain = log_domain; |
fe000966 DM |
1254 | dfsm->data = data; |
1255 | dfsm->mode = DFSM_MODE_START; | |
1256 | dfsm->protocol_version = protocol_version; | |
1257 | strcpy (dfsm->cpg_group_name.value, group_name); | |
1258 | dfsm->cpg_group_name.length = strlen (group_name) + 1; | |
1259 | ||
1260 | dfsm->cpg_callbacks = &cpg_callbacks; | |
1261 | dfsm->dfsm_callbacks = callbacks; | |
1262 | ||
1263 | dfsm->members = g_hash_table_new(dfsm_sync_info_hash, dfsm_sync_info_equal); | |
1264 | if (!dfsm->members) | |
1265 | goto err; | |
1266 | ||
89fde9ac | 1267 | g_mutex_init(&dfsm->mode_mutex); |
fe000966 DM |
1268 | |
1269 | return dfsm; | |
1270 | ||
1271 | err: | |
1272 | dfsm_destroy(dfsm); | |
1273 | return NULL; | |
1274 | } | |
1275 | ||
af2e9dd4 DM |
1276 | gboolean |
1277 | dfsm_is_initialized(dfsm_t *dfsm) | |
1278 | { | |
1279 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1280 | ||
1281 | return (dfsm->cpg_handle != 0) ? TRUE : FALSE; | |
1282 | } | |
1283 | ||
fe000966 DM |
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); | |
89fde9ac | 1346 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
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); | |
751a3b88 | 1382 | goto err_no_finalize; |
fe000966 DM |
1383 | } |
1384 | ||
1385 | if ((result = cpg_local_get(dfsm->cpg_handle, &dfsm->nodeid)) != CS_OK) { | |
1386 | cfs_dom_critical(dfsm->log_domain, "cpg_local_get failed: %d", result); | |
751a3b88 | 1387 | goto err_finalize; |
fe000966 DM |
1388 | } |
1389 | ||
1390 | dfsm->pid = getpid(); | |
1391 | ||
1392 | result = cpg_context_set(dfsm->cpg_handle, dfsm); | |
1393 | if (result != CS_OK) { | |
1394 | cfs_dom_critical(dfsm->log_domain, "cpg_context_set failed: %d", result); | |
751a3b88 | 1395 | goto err_finalize; |
fe000966 DM |
1396 | } |
1397 | } | |
1398 | ||
1399 | result = cpg_fd_get(dfsm->cpg_handle, fd); | |
1400 | if (result != CS_OK) { | |
1401 | cfs_dom_critical(dfsm->log_domain, "cpg_fd_get failed: %d", result); | |
751a3b88 | 1402 | goto err_finalize; |
fe000966 DM |
1403 | } |
1404 | ||
1405 | return CS_OK; | |
1406 | ||
751a3b88 TL |
1407 | err_finalize: |
1408 | cpg_finalize(dfsm->cpg_handle); | |
1409 | err_no_finalize: | |
fe000966 DM |
1410 | dfsm->cpg_handle = 0; |
1411 | return result; | |
1412 | } | |
1413 | ||
1414 | cs_error_t | |
1415 | dfsm_join(dfsm_t *dfsm) | |
1416 | { | |
1417 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1418 | g_return_val_if_fail(dfsm->cpg_handle != 0, CS_ERR_LIBRARY); | |
1419 | g_return_val_if_fail(dfsm->joined == 0, CS_ERR_EXIST); | |
1420 | ||
1421 | cs_error_t result; | |
1422 | ||
1423 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1424 | int retries = 0; | |
1425 | loop: | |
1426 | result = cpg_join(dfsm->cpg_handle, &dfsm->cpg_group_name); | |
89fde9ac | 1427 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
1428 | nanosleep(&tvreq, NULL); |
1429 | ++retries; | |
1430 | if ((retries % 10) == 0) | |
1431 | cfs_dom_message(dfsm->log_domain, "cpg_join retry %d", retries); | |
1432 | goto loop; | |
1433 | } | |
1434 | ||
1435 | if (result != CS_OK) { | |
1436 | cfs_dom_critical(dfsm->log_domain, "cpg_join failed: %d", result); | |
1437 | return result; | |
1438 | } | |
1439 | ||
1440 | dfsm->joined = TRUE; | |
1441 | return TRUE; | |
1442 | } | |
1443 | ||
1444 | cs_error_t | |
1445 | dfsm_leave (dfsm_t *dfsm) | |
1446 | { | |
1447 | g_return_val_if_fail(dfsm != NULL, CS_ERR_INVALID_PARAM); | |
1448 | g_return_val_if_fail(dfsm->joined, CS_ERR_NOT_EXIST); | |
1449 | ||
1450 | cs_error_t result; | |
1451 | ||
1452 | struct timespec tvreq = { .tv_sec = 0, .tv_nsec = 100000000 }; | |
1453 | int retries = 0; | |
1454 | loop: | |
1455 | result = cpg_leave(dfsm->cpg_handle, &dfsm->cpg_group_name); | |
89fde9ac | 1456 | if (result == CS_ERR_TRY_AGAIN) { |
fe000966 DM |
1457 | nanosleep(&tvreq, NULL); |
1458 | ++retries; | |
1459 | if ((retries % 10) == 0) | |
1460 | cfs_dom_message(dfsm->log_domain, "cpg_leave retry %d", retries); | |
1461 | goto loop; | |
1462 | } | |
1463 | ||
1464 | if (result != CS_OK) { | |
1465 | cfs_dom_critical(dfsm->log_domain, "cpg_leave failed: %d", result); | |
1466 | return result; | |
1467 | } | |
1468 | ||
1469 | dfsm->joined = FALSE; | |
1470 | ||
1471 | return TRUE; | |
1472 | } | |
1473 | ||
1474 | gboolean | |
1475 | dfsm_finalize(dfsm_t *dfsm) | |
1476 | { | |
1477 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1478 | ||
1479 | dfsm_send_sync_message_abort(dfsm); | |
1480 | ||
1481 | if (dfsm->joined) | |
1482 | dfsm_leave(dfsm); | |
1483 | ||
1484 | if (dfsm->cpg_handle) { | |
1485 | cpg_finalize(dfsm->cpg_handle); | |
1486 | dfsm->cpg_handle = 0; | |
1487 | dfsm->joined = FALSE; | |
1488 | dfsm->we_are_member = 0; | |
1489 | } | |
1490 | ||
1491 | return TRUE; | |
1492 | } | |
1493 | ||
1494 | void | |
1495 | dfsm_destroy(dfsm_t *dfsm) | |
1496 | { | |
1497 | g_return_if_fail(dfsm != NULL); | |
1498 | ||
1499 | dfsm_finalize(dfsm); | |
1500 | ||
1501 | if (dfsm->sync_info && dfsm->sync_info->data && dfsm->dfsm_callbacks->dfsm_cleanup_fn) | |
1502 | dfsm->dfsm_callbacks->dfsm_cleanup_fn(dfsm, dfsm->data, dfsm->sync_info); | |
1503 | ||
1504 | dfsm_free_sync_queue(dfsm); | |
1505 | ||
89fde9ac | 1506 | g_mutex_clear (&dfsm->mode_mutex); |
fe000966 | 1507 | |
89fde9ac | 1508 | g_mutex_clear (&dfsm->sync_mutex); |
fe000966 | 1509 | |
89fde9ac | 1510 | g_cond_clear (&dfsm->sync_cond); |
fe000966 DM |
1511 | |
1512 | if (dfsm->results) | |
1513 | g_hash_table_destroy(dfsm->results); | |
1514 | ||
1515 | if (dfsm->msg_queue) { | |
1516 | dfsm_free_message_queue(dfsm); | |
1517 | g_sequence_free(dfsm->msg_queue); | |
1518 | } | |
1519 | ||
1520 | if (dfsm->sync_info) | |
1521 | g_free(dfsm->sync_info); | |
1522 | ||
1523 | if (dfsm->cpg_handle) | |
1524 | cpg_finalize(dfsm->cpg_handle); | |
1525 | ||
1526 | if (dfsm->members) | |
1527 | g_hash_table_destroy(dfsm->members); | |
1528 | ||
fe000966 DM |
1529 | g_free(dfsm); |
1530 | } | |
1531 | ||
1532 | typedef struct { | |
1533 | dfsm_t *dfsm; | |
1534 | } service_dfsm_private_t; | |
1535 | ||
1536 | static gboolean | |
1537 | service_dfsm_finalize( | |
1538 | cfs_service_t *service, | |
1539 | gpointer context) | |
1540 | { | |
1541 | g_return_val_if_fail(service != NULL, FALSE); | |
1542 | g_return_val_if_fail(context != NULL, FALSE); | |
1543 | ||
1544 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1545 | dfsm_t *dfsm = private->dfsm; | |
1546 | ||
1547 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1548 | ||
1549 | return dfsm_finalize(dfsm); | |
1550 | } | |
1551 | ||
1552 | static int | |
1553 | service_dfsm_initialize( | |
1554 | cfs_service_t *service, | |
1555 | gpointer context) | |
1556 | { | |
1557 | g_return_val_if_fail(service != NULL, -1); | |
1558 | g_return_val_if_fail(context != NULL, -1); | |
1559 | ||
1560 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1561 | dfsm_t *dfsm = private->dfsm; | |
1562 | ||
1563 | g_return_val_if_fail(dfsm != NULL, -1); | |
1564 | ||
1565 | /* serious internal error - don't try to recover */ | |
1566 | if (!dfsm_restartable(dfsm)) | |
1567 | return -1; | |
1568 | ||
1569 | int fd = -1; | |
1570 | ||
1571 | cs_error_t result; | |
1572 | if ((result = dfsm_initialize(dfsm, &fd)) != CS_OK) | |
1573 | return -1; | |
1574 | ||
1575 | result = dfsm_join(dfsm); | |
1576 | if (result != CS_OK) { | |
1577 | /* we can't dispatch if not joined, so we need to finalize */ | |
1578 | dfsm_finalize(dfsm); | |
1579 | return -1; | |
1580 | } | |
1581 | ||
1582 | return fd; | |
1583 | } | |
1584 | ||
1585 | static gboolean | |
1586 | service_dfsm_dispatch( | |
1587 | cfs_service_t *service, | |
1588 | gpointer context) | |
1589 | { | |
1590 | g_return_val_if_fail(service != NULL, FALSE); | |
1591 | g_return_val_if_fail(context != NULL, FALSE); | |
1592 | ||
1593 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1594 | dfsm_t *dfsm = private->dfsm; | |
1595 | ||
1596 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
1597 | g_return_val_if_fail(dfsm->cpg_handle != 0, FALSE); | |
1598 | ||
1599 | cs_error_t result; | |
1600 | ||
89fde9ac | 1601 | result = dfsm_dispatch(dfsm, CS_DISPATCH_ONE); |
fe000966 DM |
1602 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) |
1603 | goto finalize; | |
1604 | if (result != CS_OK) | |
1605 | goto fail; | |
1606 | ||
1607 | dfsm_mode_t mode = dfsm_get_mode(dfsm); | |
1608 | if (mode >= DFSM_ERROR_MODE_START) { | |
1609 | if (dfsm->joined) { | |
1610 | result = dfsm_leave(dfsm); | |
1611 | if (result == CS_ERR_LIBRARY || result == CS_ERR_BAD_HANDLE) | |
1612 | goto finalize; | |
1613 | if (result != CS_OK) | |
1614 | goto finalize; | |
1615 | } else { | |
1616 | if (!dfsm->we_are_member) | |
1617 | return FALSE; | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | return TRUE; | |
1622 | ||
751a3b88 TL |
1623 | finalize: |
1624 | dfsm_finalize(dfsm); | |
fe000966 DM |
1625 | fail: |
1626 | cfs_service_set_restartable(service, dfsm_restartable(dfsm)); | |
1627 | return FALSE; | |
fe000966 DM |
1628 | } |
1629 | ||
1630 | static void | |
1631 | service_dfsm_timer( | |
1632 | cfs_service_t *service, | |
1633 | gpointer context) | |
1634 | { | |
1635 | g_return_if_fail(service != NULL); | |
1636 | g_return_if_fail(context != NULL); | |
1637 | ||
1638 | service_dfsm_private_t *private = (service_dfsm_private_t *)context; | |
1639 | dfsm_t *dfsm = private->dfsm; | |
1640 | ||
1641 | g_return_if_fail(dfsm != NULL); | |
1642 | ||
1643 | dfsm_verify_request(dfsm); | |
1644 | } | |
1645 | ||
1646 | static cfs_service_callbacks_t cfs_dfsm_callbacks = { | |
1647 | .cfs_service_initialize_fn = service_dfsm_initialize, | |
1648 | .cfs_service_finalize_fn = service_dfsm_finalize, | |
1649 | .cfs_service_dispatch_fn = service_dfsm_dispatch, | |
1650 | .cfs_service_timer_fn = service_dfsm_timer, | |
1651 | }; | |
1652 | ||
1653 | cfs_service_t * | |
1654 | service_dfsm_new(dfsm_t *dfsm) | |
1655 | { | |
1656 | cfs_service_t *service; | |
1657 | ||
1658 | g_return_val_if_fail(dfsm != NULL, NULL); | |
1659 | ||
1660 | service_dfsm_private_t *private = g_new0(service_dfsm_private_t, 1); | |
1661 | if (!private) | |
1662 | return NULL; | |
1663 | ||
1664 | private->dfsm = dfsm; | |
1665 | ||
1666 | service = cfs_service_new(&cfs_dfsm_callbacks, dfsm->log_domain, private); | |
1667 | ||
1668 | return service; | |
1669 | } | |
1670 | ||
1671 | void | |
1672 | service_dfsm_destroy(cfs_service_t *service) | |
1673 | { | |
1674 | g_return_if_fail(service != NULL); | |
1675 | ||
1676 | service_dfsm_private_t *private = | |
1677 | (service_dfsm_private_t *)cfs_service_get_context(service); | |
1678 | ||
1679 | g_free(private); | |
1680 | g_free(service); | |
1681 | } | |
1682 | ||
1683 | ||
1684 | ||
1685 |