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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 | #define G_LOG_DOMAIN "dcdb" | |
22 | ||
23 | #ifdef HAVE_CONFIG_H | |
24 | #include <config.h> | |
25 | #endif /* HAVE_CONFIG_H */ | |
26 | ||
27 | #include <stdlib.h> | |
28 | #include <stdio.h> | |
e5a5a3ea | 29 | #include <inttypes.h> |
fe000966 DM |
30 | #include <string.h> |
31 | #include <unistd.h> | |
32 | #include <glib.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/wait.h> | |
35 | #include <arpa/inet.h> | |
36 | #include <sys/epoll.h> | |
37 | #include <dirent.h> | |
38 | #include <errno.h> | |
39 | ||
40 | #include "cfs-utils.h" | |
41 | #include "loop.h" | |
42 | #include "dcdb.h" | |
43 | #include "status.h" | |
44 | ||
45 | typedef struct { | |
46 | memdb_index_t *master; | |
47 | memdb_index_t *idx; | |
48 | GList *updates; | |
49 | } dcdb_sync_info_t; | |
50 | ||
51 | void | |
52 | dcdb_send_unlock( | |
53 | dfsm_t *dfsm, | |
54 | const char *path, | |
55 | const guchar csum[32], | |
56 | gboolean request) | |
57 | { | |
58 | g_return_if_fail(dfsm != NULL); | |
59 | g_return_if_fail(path != NULL); | |
60 | g_return_if_fail(csum != NULL); | |
61 | ||
62 | struct iovec iov[2]; | |
63 | ||
64 | iov[0].iov_base = (char *)csum; | |
65 | iov[0].iov_len = 32; | |
66 | ||
67 | iov[1].iov_base = (char *)path; | |
68 | iov[1].iov_len = strlen(path) + 1; | |
69 | ||
70 | if (!cfs_is_quorate()) | |
71 | return; | |
72 | ||
73 | dcdb_message_t msg_type = request ? | |
74 | DCDB_MESSAGE_CFS_UNLOCK_REQUEST : DCDB_MESSAGE_CFS_UNLOCK; | |
75 | ||
76 | dfsm_send_message_sync(dfsm, msg_type, iov, 2, NULL); | |
77 | } | |
78 | ||
79 | static gboolean | |
80 | dcdb_parse_unlock_request( | |
81 | const void *msg, | |
82 | size_t msg_len, | |
83 | const char **path, | |
84 | const guchar **csum) | |
85 | ||
86 | { | |
87 | g_return_val_if_fail(msg != NULL, FALSE); | |
88 | g_return_val_if_fail(path != NULL, FALSE); | |
89 | g_return_val_if_fail(csum != NULL, FALSE); | |
90 | ||
91 | if (msg_len < 33) { | |
e5a5a3ea | 92 | cfs_critical("received short unlock message (%zu < 33)", msg_len); |
fe000966 DM |
93 | return FALSE; |
94 | } | |
95 | ||
96 | *csum = msg; | |
97 | msg += 32; msg_len -= 32; | |
98 | ||
99 | *path = msg; | |
100 | if ((*path)[msg_len - 1] != 0) { | |
101 | cfs_critical("received mailformed unlock message - 'path' not terminated"); | |
102 | *path = NULL; | |
103 | return FALSE; | |
104 | } | |
105 | ||
106 | return TRUE; | |
107 | } | |
108 | ||
109 | int | |
110 | dcdb_send_fuse_message( | |
111 | dfsm_t *dfsm, | |
112 | dcdb_message_t msg_type, | |
113 | const char *path, | |
114 | const char *to, | |
115 | const char *buf, | |
116 | guint32 size, | |
117 | guint32 offset, | |
118 | guint32 flags) | |
119 | { | |
120 | struct iovec iov[8]; | |
121 | ||
122 | iov[0].iov_base = (char *)&size; | |
123 | iov[0].iov_len = sizeof(size); | |
124 | ||
125 | iov[1].iov_base = (char *)&offset; | |
126 | iov[1].iov_len = sizeof(offset); | |
127 | ||
128 | guint32 pathlen = path ? strlen(path) + 1 : 0; | |
129 | iov[2].iov_base = (char *)&pathlen; | |
130 | iov[2].iov_len = sizeof(pathlen); | |
131 | ||
132 | guint32 tolen = to ? strlen(to) + 1 : 0; | |
133 | iov[3].iov_base = (char *)&tolen; | |
134 | iov[3].iov_len = sizeof(tolen); | |
135 | ||
136 | iov[4].iov_base = (char *)&flags; | |
137 | iov[4].iov_len = sizeof(flags); | |
138 | ||
139 | iov[5].iov_base = (char *)path; | |
140 | iov[5].iov_len = pathlen; | |
141 | ||
142 | iov[6].iov_base = (char *)to; | |
143 | iov[6].iov_len = tolen; | |
144 | ||
145 | iov[7].iov_base = (char *)buf; | |
146 | iov[7].iov_len = size; | |
147 | ||
148 | dfsm_result_t rc; | |
149 | memset(&rc, 0, sizeof(rc)); | |
150 | rc.result = -EBUSY; | |
151 | ||
152 | if (!cfs_is_quorate()) | |
153 | return -EACCES; | |
154 | ||
155 | if (dfsm_send_message_sync(dfsm, msg_type, iov, 8, &rc)) | |
156 | return rc.result; | |
157 | ||
158 | return -EACCES; | |
159 | } | |
160 | ||
161 | static gboolean | |
162 | dcdb_parse_fuse_message( | |
163 | const void *msg, | |
164 | size_t msg_len, | |
165 | const char **path, | |
166 | const char **to, | |
167 | const char **buf, | |
168 | guint32 *size, | |
169 | guint32 *offset, | |
170 | guint32 *flags) | |
171 | ||
172 | { | |
173 | g_return_val_if_fail(msg != NULL, FALSE); | |
174 | g_return_val_if_fail(path != NULL, FALSE); | |
175 | g_return_val_if_fail(to != NULL, FALSE); | |
176 | g_return_val_if_fail(buf != NULL, FALSE); | |
177 | g_return_val_if_fail(size != NULL, FALSE); | |
178 | g_return_val_if_fail(offset != NULL, FALSE); | |
179 | g_return_val_if_fail(flags != NULL, FALSE); | |
180 | ||
181 | if (msg_len < 20) { | |
e5a5a3ea | 182 | cfs_critical("received short fuse message (%zu < 20)", msg_len); |
fe000966 DM |
183 | return FALSE; |
184 | } | |
185 | ||
186 | *size = *((guint32 *)msg); | |
187 | msg += 4; msg_len -= 4; | |
188 | ||
189 | *offset = *((guint32 *)msg); | |
190 | msg += 4; msg_len -= 4; | |
191 | ||
192 | guint32 pathlen = *((guint32 *)msg); | |
193 | msg += 4; msg_len -= 4; | |
194 | ||
195 | guint32 tolen = *((guint32 *)msg); | |
196 | msg += 4; msg_len -= 4; | |
197 | ||
198 | *flags = *((guint32 *)msg); | |
199 | msg += 4; msg_len -= 4; | |
200 | ||
201 | if (msg_len != ((*size) + pathlen + tolen)) { | |
202 | cfs_critical("received mailformed fuse message"); | |
203 | return FALSE; | |
204 | } | |
205 | ||
206 | *path = (char *)msg; | |
207 | msg += pathlen; msg_len -= pathlen; | |
208 | ||
209 | if (pathlen) { | |
210 | if ((*path)[pathlen - 1] != 0) { | |
211 | cfs_critical("received mailformed fuse message - 'path' not terminated"); | |
212 | *path = NULL; | |
213 | return FALSE; | |
214 | } | |
215 | } else { | |
216 | *path = NULL; | |
217 | } | |
218 | ||
219 | *to = (char *)msg; | |
220 | msg += tolen; msg_len -= tolen; | |
221 | ||
222 | if (tolen) { | |
223 | if ((*to)[tolen - 1] != 0) { | |
224 | cfs_critical("received mailformed fuse message - 'to' not terminated"); | |
225 | *to = NULL; | |
226 | return FALSE; | |
227 | } | |
228 | } else { | |
229 | *to = NULL; | |
230 | } | |
231 | ||
232 | *buf = (*size) ? msg : NULL; | |
233 | ||
234 | return TRUE; | |
235 | } | |
236 | ||
237 | static gboolean | |
238 | dcdb_send_update_inode( | |
239 | dfsm_t *dfsm, | |
240 | memdb_tree_entry_t *te) | |
241 | { | |
242 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
243 | g_return_val_if_fail(te != NULL, FALSE); | |
244 | ||
245 | int len; | |
246 | struct iovec iov[20]; | |
247 | ||
248 | uint32_t namelen = strlen(te->name) + 1; | |
249 | ||
250 | iov[0].iov_base = (char *)&te->parent; | |
251 | iov[0].iov_len = sizeof(te->parent); | |
252 | iov[1].iov_base = (char *)&te->inode; | |
253 | iov[1].iov_len = sizeof(te->inode); | |
254 | iov[2].iov_base = (char *)&te->version; | |
255 | iov[2].iov_len = sizeof(te->version); | |
256 | iov[3].iov_base = (char *)&te->writer; | |
257 | iov[3].iov_len = sizeof(te->writer); | |
258 | iov[4].iov_base = (char *)&te->mtime; | |
259 | iov[4].iov_len = sizeof(te->mtime); | |
260 | iov[5].iov_base = (char *)&te->size; | |
261 | iov[5].iov_len = sizeof(te->size); | |
262 | iov[6].iov_base = (char *)&namelen; | |
263 | iov[6].iov_len = sizeof(namelen); | |
264 | iov[7].iov_base = (char *)&te->type; | |
265 | iov[7].iov_len = sizeof(te->type); | |
266 | iov[8].iov_base = (char *)te->name; | |
267 | iov[8].iov_len = namelen; | |
268 | ||
269 | len = 9; | |
270 | if (te->type == DT_REG && te->size) { | |
271 | iov[9].iov_base = (char *)te->data.value; | |
272 | iov[9].iov_len = te->size; | |
273 | len++; | |
274 | } | |
275 | ||
276 | if (dfsm_send_update(dfsm, iov, len) != CS_OK) | |
277 | return FALSE; | |
278 | ||
279 | return TRUE; | |
280 | } | |
281 | ||
282 | memdb_tree_entry_t * | |
283 | dcdb_parse_update_inode( | |
284 | const void *msg, | |
285 | size_t msg_len) | |
286 | { | |
287 | if (msg_len < 40) { | |
288 | cfs_critical("received short message (msg_len < 40)"); | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | guint64 parent = *((guint64 *)msg); | |
293 | msg += 8; msg_len -= 8; | |
294 | guint64 inode = *((guint64 *)msg); | |
295 | msg += 8; msg_len -= 8; | |
296 | guint64 version = *((guint64 *)msg); | |
297 | msg += 8; msg_len -= 8; | |
298 | ||
299 | guint32 writer = *((guint32 *)msg); | |
300 | msg += 4; msg_len -= 4; | |
301 | guint32 mtime = *((guint32 *)msg); | |
302 | msg += 4; msg_len -= 4; | |
303 | guint32 size = *((guint32 *)msg); | |
304 | msg += 4; msg_len -= 4; | |
305 | guint32 namelen = *((guint32 *)msg); | |
306 | msg += 4; msg_len -= 4; | |
307 | ||
308 | char type = *((char *)msg); | |
309 | msg += 1; msg_len -= 1; | |
310 | ||
311 | if (!(type == DT_REG || type == DT_DIR)) { | |
312 | cfs_critical("received mailformed message (unknown inode type %d)", type); | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | if (msg_len != (size + namelen)) { | |
317 | cfs_critical("received mailformed message (msg_len != (size + namelen))"); | |
318 | return NULL; | |
319 | } | |
320 | ||
321 | char *name = (char *)msg; | |
322 | msg += namelen; msg_len -= namelen; | |
323 | ||
324 | const void *data = msg; | |
325 | ||
326 | if (name[namelen - 1] != 0) { | |
327 | cfs_critical("received mailformed message (name[namelen-1] != 0)"); | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | memdb_tree_entry_t *te = memdb_tree_entry_new(name); | |
332 | if (!te) | |
333 | return NULL; | |
334 | ||
335 | te->parent = parent; | |
336 | te->version = version; | |
337 | te->inode = inode; | |
338 | te->writer = writer; | |
339 | te->mtime = mtime; | |
340 | te->size = size; | |
341 | te->type = type; | |
342 | ||
343 | if (te->type == DT_REG && te->size) { | |
344 | te->data.value = g_memdup(data, te->size); | |
345 | if (!te->data.value) { | |
346 | memdb_tree_entry_free(te); | |
347 | return NULL; | |
348 | } | |
349 | } | |
350 | ||
351 | return te; | |
352 | } | |
353 | ||
354 | void | |
2113d031 | 355 | dcdb_sync_corosync_conf( |
fe000966 | 356 | memdb_t *memdb, |
2113d031 | 357 | gboolean notify_corosync) |
fe000966 DM |
358 | { |
359 | g_return_if_fail(memdb != NULL); | |
360 | ||
361 | int len; | |
362 | gpointer data = NULL; | |
363 | ||
2113d031 | 364 | len = memdb_read(memdb, "corosync.conf", &data); |
fe000966 DM |
365 | if (len <= 0) |
366 | return; | |
367 | ||
368 | guint64 new_version = cluster_config_version(data, len); | |
2113d031 DM |
369 | if (!new_version) { |
370 | cfs_critical("unable to parse cluster config_version"); | |
fe000966 | 371 | return; |
2113d031 | 372 | } |
fe000966 DM |
373 | |
374 | char *old_data = NULL; | |
375 | gsize old_length = 0; | |
376 | guint64 old_version = 0; | |
377 | ||
378 | GError *err = NULL; | |
379 | if (!g_file_get_contents(HOST_CLUSTER_CONF_FN, &old_data, &old_length, &err)) { | |
f6efd6bf DM |
380 | if (!g_error_matches(err, G_FILE_ERROR, G_FILE_ERROR_NOENT)) { |
381 | cfs_critical("unable to read cluster config file '%s' - %s", | |
382 | HOST_CLUSTER_CONF_FN, err->message); | |
383 | } | |
fe000966 DM |
384 | g_error_free (err); |
385 | } else { | |
386 | if (old_length) | |
387 | old_version = cluster_config_version(old_data, old_length); | |
388 | } | |
389 | ||
390 | /* test if something changed - return if no changes */ | |
391 | if (data && old_data && (old_length == len) && | |
392 | !memcmp(data, old_data, len)) | |
393 | goto ret; | |
394 | ||
395 | if (new_version < old_version) { | |
2113d031 | 396 | cfs_critical("local corosync.conf is newer"); |
fe000966 DM |
397 | goto ret; |
398 | } | |
399 | ||
2113d031 | 400 | if (!atomic_write_file(HOST_CLUSTER_CONF_FN, data, len, 0644, 0)) |
fe000966 DM |
401 | goto ret; |
402 | ||
e5a5a3ea | 403 | cfs_message("wrote new corosync config '%s' (version = %" G_GUINT64_FORMAT ")", |
2113d031 DM |
404 | HOST_CLUSTER_CONF_FN, new_version); |
405 | ||
406 | if (notify_corosync && old_version) { | |
407 | /* tell corosync that there is a new config file */ | |
408 | cfs_debug ("run corosync-cfgtool -R"); | |
409 | int status = system("corosync-cfgtool -R >/dev/null 2>&1"); | |
fe000966 | 410 | if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { |
2113d031 | 411 | cfs_critical("corosync-cfgtool -R failed with exit code %d\n", WEXITSTATUS(status)); |
fe000966 | 412 | } |
2113d031 | 413 | cfs_debug ("end corosync-cfgtool -R"); |
fe000966 DM |
414 | } |
415 | ||
416 | ret: | |
417 | ||
418 | if (data) | |
419 | g_free(data); | |
420 | ||
421 | if (old_data) | |
422 | g_free(old_data); | |
423 | } | |
424 | ||
425 | static gpointer | |
426 | dcdb_get_state( | |
427 | dfsm_t *dfsm, | |
428 | gpointer data, | |
429 | unsigned int *res_len) | |
430 | { | |
431 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
432 | g_return_val_if_fail(data != NULL, FALSE); | |
433 | ||
434 | memdb_t *memdb = (memdb_t *)data; | |
435 | ||
436 | g_return_val_if_fail(memdb->root != NULL, FALSE); | |
fe000966 | 437 | |
e5a5a3ea | 438 | cfs_debug("enter %s %016" PRIX64 " %08X", __func__, (uint64_t) memdb->root->version, memdb->root->mtime); |
fe000966 | 439 | |
89fde9ac | 440 | g_mutex_lock (&memdb->mutex); |
fe000966 | 441 | memdb_index_t *idx = memdb_encode_index(memdb->index, memdb->root); |
89fde9ac | 442 | g_mutex_unlock (&memdb->mutex); |
fe000966 DM |
443 | |
444 | if (idx) { | |
445 | *res_len = idx->bytes; | |
446 | } | |
447 | ||
448 | return idx; | |
449 | } | |
450 | ||
451 | static int | |
452 | dcdb_select_leader( | |
453 | int node_count, | |
454 | memdb_index_t *idx[]) | |
455 | { | |
456 | g_return_val_if_fail(idx != NULL, -1); | |
457 | ||
458 | cfs_debug("enter %s", __func__); | |
459 | ||
460 | int leader = -1; | |
461 | ||
462 | /* try select most actual data - compare 'version' an 'time of last write' | |
463 | * NOTE: syncinfo members are sorted | |
464 | */ | |
465 | for (int i = 0; i < node_count; i++) { | |
466 | if (leader < 0) { | |
467 | leader = i; | |
468 | } else { | |
469 | memdb_index_t *leaderidx = idx[leader]; | |
470 | ||
471 | if (idx[i]->version == leaderidx->version && | |
472 | idx[i]->mtime > leaderidx->mtime) { | |
473 | leader = i; | |
474 | } else if (idx[i]->version > leaderidx->version) { | |
475 | leader = i; | |
476 | } | |
477 | } | |
478 | } | |
479 | ||
480 | cfs_debug ("leave %s (%d)", __func__, leader); | |
481 | ||
482 | return leader; | |
483 | } | |
484 | ||
485 | static gboolean | |
486 | dcdb_create_and_send_updates( | |
487 | dfsm_t *dfsm, | |
488 | memdb_t *memdb, | |
489 | memdb_index_t *master, | |
490 | int node_count, | |
491 | memdb_index_t *idx[]) | |
492 | { | |
493 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
494 | g_return_val_if_fail(memdb != NULL, FALSE); | |
fe000966 DM |
495 | g_return_val_if_fail(master != NULL, FALSE); |
496 | ||
497 | cfs_debug("enter %s", __func__); | |
498 | ||
499 | gboolean res = FALSE; | |
500 | ||
501 | GHashTable *updates = g_hash_table_new(g_int64_hash, g_int64_equal); | |
502 | if (!updates) | |
503 | goto ret; | |
504 | ||
89fde9ac | 505 | g_mutex_lock (&memdb->mutex); |
fe000966 DM |
506 | |
507 | for (int n = 0; n < node_count; n++) { | |
508 | memdb_index_t *slave = idx[n]; | |
509 | ||
510 | if (slave == master) | |
511 | continue; | |
512 | ||
513 | int j = 0; | |
514 | ||
515 | for (int i = 0; i < master->size; i++) { | |
516 | guint64 inode = master->entries[i].inode; | |
517 | while (j < slave->size && slave->entries[j].inode < inode) | |
518 | j++; | |
519 | ||
520 | if (memcmp(&slave->entries[j], &master->entries[i], | |
521 | sizeof(memdb_index_extry_t)) == 0) { | |
522 | continue; | |
523 | } | |
524 | ||
525 | if (g_hash_table_lookup(updates, &inode)) | |
526 | continue; | |
527 | ||
e5a5a3ea | 528 | cfs_debug("found different inode %d %016" PRIX64, i, (uint64_t) inode); |
fe000966 DM |
529 | |
530 | memdb_tree_entry_t *te, *cpy; | |
531 | ||
532 | if (!(te = g_hash_table_lookup(memdb->index, &inode))) { | |
e5a5a3ea | 533 | cfs_critical("can get inode data for inode %016" PRIX64, (uint64_t) inode); |
fe000966 DM |
534 | goto ret; |
535 | } | |
536 | ||
537 | cpy = memdb_tree_entry_copy(te, 1); | |
538 | g_hash_table_replace(updates, &cpy->inode, cpy); | |
539 | } | |
540 | } | |
541 | ||
89fde9ac | 542 | g_mutex_unlock (&memdb->mutex); |
fe000966 DM |
543 | |
544 | /* send updates */ | |
545 | ||
546 | GHashTableIter iter; | |
547 | gpointer key, value; | |
548 | int count = 0; | |
549 | ||
550 | cfs_message("start sending inode updates"); | |
551 | ||
552 | g_hash_table_iter_init (&iter, updates); | |
553 | while (g_hash_table_iter_next (&iter, &key, &value)) { | |
554 | memdb_tree_entry_t *te = (memdb_tree_entry_t *)value; | |
555 | count++; | |
556 | ||
557 | if (!dcdb_send_update_inode(dfsm, te)) { | |
558 | /* tolerate error here */ | |
e5a5a3ea | 559 | cfs_critical("sending update inode failed %016" PRIX64, (uint64_t) te->inode); |
fe000966 | 560 | } else { |
e5a5a3ea | 561 | cfs_debug("sent update inode %016" PRIX64, (uint64_t) te->inode); |
fe000966 DM |
562 | } |
563 | ||
564 | memdb_tree_entry_free(te); | |
565 | } | |
566 | ||
567 | cfs_message("sent all (%d) updates", count); | |
568 | ||
569 | if (dfsm_send_update_complete(dfsm) != CS_OK) { | |
570 | cfs_critical("failed to send UPDATE_COMPLETE message"); | |
571 | goto ret; | |
572 | } | |
573 | ||
574 | res = TRUE; | |
575 | ||
576 | ret: | |
577 | if (updates) | |
578 | g_hash_table_destroy(updates); | |
579 | ||
580 | cfs_debug("leave %s (%d)", __func__, res); | |
581 | ||
582 | return res; | |
583 | } | |
584 | ||
585 | static int | |
586 | dcdb_process_state_update( | |
587 | dfsm_t *dfsm, | |
588 | gpointer data, | |
589 | dfsm_sync_info_t *syncinfo) | |
590 | { | |
591 | g_return_val_if_fail(dfsm != NULL, -1); | |
592 | g_return_val_if_fail(data != NULL, -1); | |
593 | g_return_val_if_fail(syncinfo != NULL, -1); | |
594 | ||
595 | memdb_t *memdb = (memdb_t *)data; | |
596 | ||
597 | cfs_debug("enter %s", __func__); | |
598 | ||
599 | dcdb_sync_info_t *localsi = g_new0(dcdb_sync_info_t, 1); | |
600 | if (!localsi) | |
601 | return -1; | |
602 | ||
603 | syncinfo->data = localsi; | |
604 | ||
605 | memdb_index_t *idx[syncinfo->node_count]; | |
606 | ||
607 | for (int i = 0; i < syncinfo->node_count; i++) { | |
608 | dfsm_node_info_t *ni = &syncinfo->nodes[i]; | |
609 | ||
610 | if (ni->state_len < sizeof(memdb_index_t)) { | |
611 | cfs_critical("received short memdb index (len < sizeof(memdb_index_t))"); | |
612 | return -1; | |
613 | } | |
614 | ||
615 | idx[i] = (memdb_index_t *)ni->state; | |
616 | ||
617 | if (ni->state_len != idx[i]->bytes) { | |
618 | cfs_critical("received mailformed memdb index (len != idx->bytes)"); | |
619 | return -1; | |
620 | } | |
621 | } | |
622 | ||
623 | /* select leader - set mode */ | |
624 | int leader = dcdb_select_leader(syncinfo->node_count, idx); | |
625 | if (leader < 0) { | |
626 | cfs_critical("unable to select leader failed"); | |
627 | return -1; | |
628 | } | |
629 | ||
630 | cfs_message("leader is %d/%d", syncinfo->nodes[leader].nodeid, syncinfo->nodes[leader].pid); | |
631 | ||
632 | memdb_index_t *leaderidx = idx[leader]; | |
633 | localsi->master = leaderidx; | |
634 | ||
635 | GString *str = g_string_new("synced members:"); | |
636 | g_string_append_printf(str, " %d/%d", syncinfo->nodes[leader].nodeid, syncinfo->nodes[leader].pid); | |
637 | ||
638 | for (int i = 0; i < syncinfo->node_count; i++) { | |
639 | dfsm_node_info_t *ni = &syncinfo->nodes[i]; | |
640 | if (i == leader) { | |
641 | ni->synced = 1; | |
642 | } else { | |
643 | if (leaderidx->bytes == idx[i]->bytes && | |
644 | memcmp(leaderidx, idx[i], leaderidx->bytes) == 0) { | |
645 | ni->synced = 1; | |
646 | g_string_append_printf(str, ", %d/%d", ni->nodeid, ni->pid); | |
647 | } | |
648 | } | |
649 | if (dfsm_nodeid_is_local(dfsm, ni->nodeid, ni->pid)) | |
650 | localsi->idx = idx[i]; | |
651 | } | |
652 | cfs_message(str->str); | |
653 | g_string_free(str, 1); | |
654 | ||
655 | /* send update */ | |
656 | if (dfsm_nodeid_is_local(dfsm, syncinfo->nodes[leader].nodeid, syncinfo->nodes[leader].pid)) { | |
657 | if (!dcdb_create_and_send_updates(dfsm, memdb, leaderidx, syncinfo->node_count, idx)) | |
658 | return -1; | |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int | |
665 | dcdb_process_update( | |
666 | dfsm_t *dfsm, | |
667 | gpointer data, | |
668 | dfsm_sync_info_t *syncinfo, | |
669 | uint32_t nodeid, | |
670 | uint32_t pid, | |
671 | const void *msg, | |
672 | size_t msg_len) | |
673 | { | |
674 | g_return_val_if_fail(dfsm != NULL, -1); | |
675 | g_return_val_if_fail(data != NULL, -1); | |
676 | g_return_val_if_fail(msg != NULL, -1); | |
677 | g_return_val_if_fail(syncinfo != NULL, -1); | |
678 | g_return_val_if_fail(syncinfo->data != NULL, -1); | |
679 | ||
680 | cfs_debug("enter %s", __func__); | |
681 | ||
682 | memdb_tree_entry_t *te; | |
683 | ||
684 | if (!(te = dcdb_parse_update_inode(msg, msg_len))) | |
685 | return -1; | |
686 | ||
e5a5a3ea TL |
687 | cfs_debug("received inode update %016" PRIX64 " from node %d", |
688 | (uint64_t) te->inode, nodeid); | |
fe000966 DM |
689 | |
690 | dcdb_sync_info_t *localsi = (dcdb_sync_info_t *)syncinfo->data; | |
691 | ||
692 | localsi->updates = g_list_append(localsi->updates, te); | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static int | |
698 | dcdb_commit( | |
699 | dfsm_t *dfsm, | |
700 | gpointer data, | |
701 | dfsm_sync_info_t *syncinfo) | |
702 | { | |
703 | g_return_val_if_fail(dfsm != NULL, -1); | |
704 | g_return_val_if_fail(data != NULL, -1); | |
705 | g_return_val_if_fail(syncinfo != NULL, -1); | |
706 | g_return_val_if_fail(syncinfo->data != NULL, -1); | |
707 | ||
708 | memdb_t *memdb = (memdb_t *)data; | |
709 | ||
710 | cfs_debug("enter %s", __func__); | |
711 | ||
712 | dcdb_sync_info_t *localsi = (dcdb_sync_info_t *)syncinfo->data; | |
713 | ||
714 | guint count = g_list_length(localsi->updates); | |
715 | ||
716 | cfs_message("update complete - trying to commit (got %u inode updates)", count); | |
717 | ||
718 | if (!bdb_backend_commit_update(memdb, localsi->master, localsi->idx, localsi->updates)) | |
719 | return -1; | |
720 | ||
2113d031 | 721 | dcdb_sync_corosync_conf(memdb, FALSE); |
fe000966 DM |
722 | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static int | |
727 | dcdb_cleanup( | |
728 | dfsm_t *dfsm, | |
729 | gpointer data, | |
730 | dfsm_sync_info_t *syncinfo) | |
731 | { | |
732 | g_return_val_if_fail(dfsm != NULL, -1); | |
733 | g_return_val_if_fail(data != NULL, -1); | |
734 | g_return_val_if_fail(syncinfo != NULL, -1); | |
735 | g_return_val_if_fail(syncinfo->data != NULL, -1); | |
736 | ||
737 | cfs_debug("enter %s", __func__); | |
738 | ||
739 | dcdb_sync_info_t *localsi = (dcdb_sync_info_t *)syncinfo->data; | |
740 | ||
741 | GList *iter = localsi->updates; | |
742 | while (iter) { | |
743 | memdb_tree_entry_t *te = (memdb_tree_entry_t *)iter->data; | |
744 | memdb_tree_entry_free(te); | |
745 | iter = g_list_next(iter); | |
746 | } | |
747 | g_list_free(localsi->updates); | |
748 | ||
749 | g_free(localsi); | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | gboolean | |
755 | dcdb_checksum( | |
756 | dfsm_t *dfsm, | |
757 | gpointer data, | |
758 | unsigned char *csum, | |
759 | size_t csum_len) | |
760 | { | |
761 | g_return_val_if_fail(dfsm != NULL, FALSE); | |
762 | g_return_val_if_fail(csum != NULL, FALSE); | |
763 | ||
764 | memdb_t *memdb = (memdb_t *)data; | |
765 | ||
766 | g_return_val_if_fail(memdb != NULL, FALSE); | |
fe000966 | 767 | |
e5a5a3ea | 768 | cfs_debug("enter %s %016" PRIX64 " %08X", __func__, memdb->root->version, memdb->root->mtime); |
fe000966 | 769 | |
89fde9ac | 770 | g_mutex_lock (&memdb->mutex); |
fe000966 | 771 | gboolean res = memdb_compute_checksum(memdb->index, memdb->root, csum, csum_len); |
89fde9ac | 772 | g_mutex_unlock (&memdb->mutex); |
fe000966 | 773 | |
e5a5a3ea | 774 | cfs_debug("leave %s %016" PRIX64 " (%d)", __func__, *( (uint64_t *) csum), res); |
fe000966 DM |
775 | |
776 | return res; | |
777 | } | |
778 | ||
779 | static int | |
780 | dcdb_deliver( | |
781 | dfsm_t *dfsm, | |
782 | gpointer data, | |
783 | int *res_ptr, | |
784 | uint32_t nodeid, | |
785 | uint32_t pid, | |
786 | uint16_t msg_type, | |
787 | uint32_t msg_time, | |
788 | const void *msg, | |
789 | size_t msg_len) | |
790 | { | |
791 | g_return_val_if_fail(dfsm != NULL, -1); | |
792 | g_return_val_if_fail(msg != NULL, -1); | |
793 | ||
794 | memdb_t *memdb = (memdb_t *)data; | |
795 | ||
796 | g_return_val_if_fail(memdb != NULL, -1); | |
797 | g_return_val_if_fail(res_ptr != NULL, -1); | |
798 | ||
799 | int res = 1; | |
800 | ||
801 | int msg_result = -ENOTSUP; | |
802 | ||
803 | if (!DCDB_VALID_MESSAGE_TYPE(msg_type)) | |
804 | goto unknown; | |
805 | ||
e5a5a3ea | 806 | cfs_debug("process message %u (length = %zd)", msg_type, msg_len); |
fe000966 DM |
807 | |
808 | if (!cfs_is_quorate()) { | |
809 | cfs_critical("received write while not quorate - trigger resync"); | |
810 | msg_result = -EACCES; | |
811 | goto leave; | |
812 | } | |
813 | ||
814 | const char *path, *to, *buf; | |
815 | guint32 size, offset, flags; | |
816 | const guchar *csum; | |
817 | ||
818 | if (msg_type == DCDB_MESSAGE_CFS_UNLOCK_REQUEST || | |
819 | msg_type == DCDB_MESSAGE_CFS_UNLOCK) { | |
820 | msg_result = 0; /* ignored anyways */ | |
821 | ||
822 | if (!dcdb_parse_unlock_request(msg, msg_len, &path, &csum)) | |
823 | goto leave; | |
824 | ||
825 | guchar cur_csum[32]; | |
826 | memdb_tree_entry_t *te = memdb_getattr(memdb, path); | |
827 | ||
828 | if (te && te->type == DT_DIR && | |
829 | path_is_lockdir(path) && memdb_tree_entry_csum(te, cur_csum) && | |
830 | (memcmp(csum, cur_csum, 32) == 0)) { | |
831 | ||
832 | if (msg_type == DCDB_MESSAGE_CFS_UNLOCK) { | |
833 | ||
834 | cfs_debug("got valid unlock message"); | |
835 | ||
836 | msg_result = memdb_delete(memdb, path, nodeid, msg_time); | |
837 | ||
838 | } else if (dfsm_lowest_nodeid(dfsm)) { | |
839 | ||
840 | cfs_debug("got valid unlock request message"); | |
841 | ||
842 | if (memdb_lock_expired(memdb, path, csum)) { | |
843 | cfs_debug("sending unlock message"); | |
844 | dcdb_send_unlock(dfsm, path, csum, FALSE); | |
845 | } | |
846 | } | |
847 | } | |
a0fce192 | 848 | memdb_tree_entry_free(te); |
fe000966 DM |
849 | |
850 | } else if (msg_type == DCDB_MESSAGE_CFS_WRITE) { | |
851 | ||
852 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
853 | &size, &offset, &flags)) | |
854 | goto leave; | |
855 | ||
856 | msg_result = memdb_write(memdb, path, nodeid, msg_time, | |
857 | buf, size, offset, flags); | |
858 | ||
2113d031 DM |
859 | if ((msg_result >= 0) && !strcmp(path, "corosync.conf")) |
860 | dcdb_sync_corosync_conf(memdb, dfsm_nodeid_is_local(dfsm, nodeid, pid)); | |
fe000966 DM |
861 | |
862 | } else if (msg_type == DCDB_MESSAGE_CFS_CREATE) { | |
863 | ||
864 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
865 | &size, &offset, &flags)) | |
866 | goto leave; | |
867 | ||
868 | msg_result = memdb_create(memdb, path, nodeid, msg_time); | |
869 | ||
2113d031 DM |
870 | if ((msg_result >= 0) && !strcmp(path, "corosync.conf")) |
871 | dcdb_sync_corosync_conf(memdb, dfsm_nodeid_is_local(dfsm, nodeid, pid)); | |
fe000966 DM |
872 | |
873 | } else if (msg_type == DCDB_MESSAGE_CFS_MKDIR) { | |
874 | ||
875 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
876 | &size, &offset, &flags)) | |
877 | goto leave; | |
878 | ||
879 | msg_result = memdb_mkdir(memdb, path, nodeid, msg_time); | |
880 | ||
881 | } else if (msg_type == DCDB_MESSAGE_CFS_DELETE) { | |
882 | ||
883 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
884 | &size, &offset, &flags)) | |
885 | goto leave; | |
886 | ||
887 | msg_result = memdb_delete(memdb, path, nodeid, msg_time); | |
888 | ||
889 | } else if (msg_type == DCDB_MESSAGE_CFS_RENAME) { | |
890 | ||
891 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
892 | &size, &offset, &flags)) | |
893 | goto leave; | |
894 | ||
895 | msg_result = memdb_rename(memdb, path, to, nodeid, msg_time); | |
896 | ||
2113d031 DM |
897 | if ((msg_result >= 0) && !strcmp(to, "corosync.conf")) |
898 | dcdb_sync_corosync_conf(memdb, dfsm_nodeid_is_local(dfsm, nodeid, pid)); | |
fe000966 DM |
899 | |
900 | } else if (msg_type == DCDB_MESSAGE_CFS_MTIME) { | |
901 | ||
902 | if (!dcdb_parse_fuse_message(msg, msg_len, &path, &to, &buf, | |
903 | &size, &offset, &flags)) | |
904 | goto leave; | |
905 | ||
906 | /* Note: mtime is sent via offset field */ | |
907 | msg_result = memdb_mtime(memdb, path, nodeid, offset); | |
908 | ||
909 | } else { | |
910 | goto unknown; | |
911 | } | |
912 | ||
913 | *res_ptr = msg_result; | |
914 | ret: | |
915 | if (memdb->errors) { | |
916 | dfsm_set_errormode(dfsm); | |
917 | res = -1; | |
918 | } | |
919 | ||
920 | cfs_debug("leave %s (%d)", __func__, res); | |
921 | ||
922 | return res; | |
751a3b88 TL |
923 | |
924 | unknown: | |
e5a5a3ea | 925 | cfs_critical("received unknown message type (msg_type == %u)", msg_type); |
fe000966 DM |
926 | leave: |
927 | res = -1; | |
928 | goto ret; | |
929 | ||
fe000966 DM |
930 | }; |
931 | ||
932 | static dfsm_callbacks_t dcdb_dfsm_callbacks = { | |
933 | .dfsm_deliver_fn = dcdb_deliver, | |
934 | .dfsm_get_state_fn = dcdb_get_state, | |
935 | .dfsm_process_state_update_fn = dcdb_process_state_update, | |
936 | .dfsm_process_update_fn = dcdb_process_update, | |
937 | .dfsm_commit_fn = dcdb_commit, | |
938 | .dfsm_cleanup_fn = dcdb_cleanup, | |
939 | .dfsm_checksum_fn = dcdb_checksum, | |
940 | }; | |
941 | ||
942 | dfsm_t *dcdb_new(memdb_t *memdb) | |
943 | { | |
944 | g_return_val_if_fail(memdb != NULL, NULL); | |
945 | ||
946 | return dfsm_new(memdb, DCDB_CPG_GROUP_NAME, G_LOG_DOMAIN, | |
947 | DCDB_PROTOCOL_VERSION, &dcdb_dfsm_callbacks); | |
948 | } |