diff options
Diffstat (limited to 'src/namecache/plugin_namecache_sqlite.c')
-rw-r--r-- | src/namecache/plugin_namecache_sqlite.c | 590 |
1 files changed, 0 insertions, 590 deletions
diff --git a/src/namecache/plugin_namecache_sqlite.c b/src/namecache/plugin_namecache_sqlite.c deleted file mode 100644 index 82008c837..000000000 --- a/src/namecache/plugin_namecache_sqlite.c +++ /dev/null | |||
@@ -1,590 +0,0 @@ | |||
1 | /* | ||
2 | * This file is part of GNUnet | ||
3 | * Copyright (C) 2009-2013 GNUnet e.V. | ||
4 | * | ||
5 | * GNUnet is free software: you can redistribute it and/or modify it | ||
6 | * under the terms of the GNU Affero General Public License as published | ||
7 | * by the Free Software Foundation, either version 3 of the License, | ||
8 | * or (at your option) any later version. | ||
9 | * | ||
10 | * GNUnet is distributed in the hope that it will be useful, but | ||
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | * Affero General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU Affero General Public License | ||
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file namecache/plugin_namecache_sqlite.c | ||
23 | * @brief sqlite-based namecache backend | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_sq_lib.h" | ||
28 | #include "gnunet_namecache_plugin.h" | ||
29 | #include "gnunet_namecache_service.h" | ||
30 | #include "gnunet_gnsrecord_lib.h" | ||
31 | #include "namecache.h" | ||
32 | #include <sqlite3.h> | ||
33 | |||
34 | /** | ||
35 | * After how many ms "busy" should a DB operation fail for good? A | ||
36 | * low value makes sure that we are more responsive to requests | ||
37 | * (especially PUTs). A high value guarantees a higher success rate | ||
38 | * (SELECTs in iterate can take several seconds despite LIMIT=1). | ||
39 | * | ||
40 | * The default value of 1s should ensure that users do not experience | ||
41 | * huge latencies while at the same time allowing operations to | ||
42 | * succeed with reasonable probability. | ||
43 | */ | ||
44 | #define BUSY_TIMEOUT_MS 1000 | ||
45 | |||
46 | |||
47 | /** | ||
48 | * Log an error message at log-level 'level' that indicates | ||
49 | * a failure of the command 'cmd' on file 'filename' | ||
50 | * with the message given by strerror(errno). | ||
51 | */ | ||
52 | #define LOG_SQLITE(db, level, cmd) do { GNUNET_log_from (level, \ | ||
53 | "namecache-sqlite", _ ( \ | ||
54 | "`%s' failed at %s:%d with error: %s\n"), \ | ||
55 | cmd, \ | ||
56 | __FILE__, __LINE__, \ | ||
57 | sqlite3_errmsg ( \ | ||
58 | db->dbh)); \ | ||
59 | } while (0) | ||
60 | |||
61 | #define LOG(kind, ...) GNUNET_log_from (kind, "namecache-sqlite", __VA_ARGS__) | ||
62 | |||
63 | |||
64 | /** | ||
65 | * Context for all functions in this plugin. | ||
66 | */ | ||
67 | struct Plugin | ||
68 | { | ||
69 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
70 | |||
71 | /** | ||
72 | * Database filename. | ||
73 | */ | ||
74 | char *fn; | ||
75 | |||
76 | /** | ||
77 | * Native SQLite database handle. | ||
78 | */ | ||
79 | sqlite3 *dbh; | ||
80 | |||
81 | /** | ||
82 | * Precompiled SQL for caching a block | ||
83 | */ | ||
84 | sqlite3_stmt *cache_block; | ||
85 | |||
86 | /** | ||
87 | * Precompiled SQL for deleting an older block | ||
88 | */ | ||
89 | sqlite3_stmt *delete_block; | ||
90 | |||
91 | /** | ||
92 | * Precompiled SQL for looking up a block | ||
93 | */ | ||
94 | sqlite3_stmt *lookup_block; | ||
95 | |||
96 | /** | ||
97 | * Precompiled SQL for removing expired blocks | ||
98 | */ | ||
99 | sqlite3_stmt *expire_blocks; | ||
100 | }; | ||
101 | |||
102 | |||
103 | /** | ||
104 | * Initialize the database connections and associated | ||
105 | * data structures (create tables and indices | ||
106 | * as needed as well). | ||
107 | * | ||
108 | * @param plugin the plugin context (state for this module) | ||
109 | * @return #GNUNET_OK on success | ||
110 | */ | ||
111 | static int | ||
112 | database_setup (struct Plugin *plugin) | ||
113 | { | ||
114 | struct GNUNET_SQ_ExecuteStatement es[] = { | ||
115 | GNUNET_SQ_make_try_execute ("PRAGMA temp_store=MEMORY"), | ||
116 | GNUNET_SQ_make_try_execute ("PRAGMA synchronous=NORMAL"), | ||
117 | GNUNET_SQ_make_try_execute ("PRAGMA legacy_file_format=OFF"), | ||
118 | GNUNET_SQ_make_try_execute ("PRAGMA auto_vacuum=INCREMENTAL"), | ||
119 | GNUNET_SQ_make_try_execute ("PRAGMA encoding=\"UTF-8\""), | ||
120 | GNUNET_SQ_make_try_execute ("PRAGMA locking_mode=EXCLUSIVE"), | ||
121 | GNUNET_SQ_make_try_execute ("PRAGMA page_size=4092"), | ||
122 | GNUNET_SQ_make_try_execute ("PRAGMA journal_mode=WAL"), | ||
123 | GNUNET_SQ_make_execute ("CREATE TABLE IF NOT EXISTS ns096blocks (" | ||
124 | " query BLOB NOT NULL," | ||
125 | " block BLOB NOT NULL," | ||
126 | " expiration_time INT8 NOT NULL" | ||
127 | ")"), | ||
128 | GNUNET_SQ_make_execute ("CREATE INDEX IF NOT EXISTS ir_query_hash " | ||
129 | "ON ns096blocks (query,expiration_time)"), | ||
130 | GNUNET_SQ_make_execute ("CREATE INDEX IF NOT EXISTS ir_block_expiration " | ||
131 | "ON ns096blocks (expiration_time)"), | ||
132 | GNUNET_SQ_EXECUTE_STATEMENT_END | ||
133 | }; | ||
134 | struct GNUNET_SQ_PrepareStatement ps[] = { | ||
135 | GNUNET_SQ_make_prepare ( | ||
136 | "INSERT INTO ns096blocks (query,block,expiration_time) VALUES (?, ?, ?)", | ||
137 | &plugin->cache_block), | ||
138 | GNUNET_SQ_make_prepare ("DELETE FROM ns096blocks WHERE expiration_time<?", | ||
139 | &plugin->expire_blocks), | ||
140 | GNUNET_SQ_make_prepare ( | ||
141 | "DELETE FROM ns096blocks WHERE query=? AND expiration_time<=?", | ||
142 | &plugin->delete_block), | ||
143 | GNUNET_SQ_make_prepare ("SELECT block FROM ns096blocks WHERE query=? " | ||
144 | "ORDER BY expiration_time DESC LIMIT 1", | ||
145 | &plugin->lookup_block), | ||
146 | GNUNET_SQ_PREPARE_END | ||
147 | }; | ||
148 | char *afsdir; | ||
149 | |||
150 | if (GNUNET_OK != | ||
151 | GNUNET_CONFIGURATION_get_value_filename (plugin->cfg, | ||
152 | "namecache-sqlite", | ||
153 | "FILENAME", | ||
154 | &afsdir)) | ||
155 | { | ||
156 | GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, | ||
157 | "namecache-sqlite", | ||
158 | "FILENAME"); | ||
159 | return GNUNET_SYSERR; | ||
160 | } | ||
161 | if (GNUNET_OK != | ||
162 | GNUNET_DISK_file_test (afsdir)) | ||
163 | { | ||
164 | if (GNUNET_OK != | ||
165 | GNUNET_DISK_directory_create_for_file (afsdir)) | ||
166 | { | ||
167 | GNUNET_break (0); | ||
168 | GNUNET_free (afsdir); | ||
169 | return GNUNET_SYSERR; | ||
170 | } | ||
171 | } | ||
172 | /* afsdir should be UTF-8-encoded. If it isn't, it's a bug */ | ||
173 | plugin->fn = afsdir; | ||
174 | |||
175 | /* Open database and precompile statements */ | ||
176 | if (SQLITE_OK != | ||
177 | sqlite3_open (plugin->fn, &plugin->dbh)) | ||
178 | { | ||
179 | LOG (GNUNET_ERROR_TYPE_ERROR, | ||
180 | _ ("Unable to initialize SQLite: %s.\n"), | ||
181 | sqlite3_errmsg (plugin->dbh)); | ||
182 | return GNUNET_SYSERR; | ||
183 | } | ||
184 | if (GNUNET_OK != | ||
185 | GNUNET_SQ_exec_statements (plugin->dbh, | ||
186 | es)) | ||
187 | { | ||
188 | GNUNET_break (0); | ||
189 | LOG (GNUNET_ERROR_TYPE_ERROR, | ||
190 | _ ("Failed to setup database at `%s'\n"), | ||
191 | plugin->fn); | ||
192 | return GNUNET_SYSERR; | ||
193 | } | ||
194 | GNUNET_break (SQLITE_OK == | ||
195 | sqlite3_busy_timeout (plugin->dbh, | ||
196 | BUSY_TIMEOUT_MS)); | ||
197 | |||
198 | if (GNUNET_OK != | ||
199 | GNUNET_SQ_prepare (plugin->dbh, | ||
200 | ps)) | ||
201 | { | ||
202 | GNUNET_break (0); | ||
203 | LOG (GNUNET_ERROR_TYPE_ERROR, | ||
204 | _ ("Failed to setup database at `%s'\n"), | ||
205 | plugin->fn); | ||
206 | return GNUNET_SYSERR; | ||
207 | } | ||
208 | |||
209 | return GNUNET_OK; | ||
210 | } | ||
211 | |||
212 | |||
213 | /** | ||
214 | * Shutdown database connection and associate data | ||
215 | * structures. | ||
216 | * @param plugin the plugin context (state for this module) | ||
217 | */ | ||
218 | static void | ||
219 | database_shutdown (struct Plugin *plugin) | ||
220 | { | ||
221 | int result; | ||
222 | sqlite3_stmt *stmt; | ||
223 | |||
224 | if (NULL != plugin->cache_block) | ||
225 | sqlite3_finalize (plugin->cache_block); | ||
226 | if (NULL != plugin->lookup_block) | ||
227 | sqlite3_finalize (plugin->lookup_block); | ||
228 | if (NULL != plugin->expire_blocks) | ||
229 | sqlite3_finalize (plugin->expire_blocks); | ||
230 | if (NULL != plugin->delete_block) | ||
231 | sqlite3_finalize (plugin->delete_block); | ||
232 | result = sqlite3_close (plugin->dbh); | ||
233 | if (result == SQLITE_BUSY) | ||
234 | { | ||
235 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
236 | _ ( | ||
237 | "Tried to close sqlite without finalizing all prepared statements.\n")); | ||
238 | stmt = sqlite3_next_stmt (plugin->dbh, | ||
239 | NULL); | ||
240 | while (stmt != NULL) | ||
241 | { | ||
242 | GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, | ||
243 | "sqlite", | ||
244 | "Closing statement %p\n", | ||
245 | stmt); | ||
246 | result = sqlite3_finalize (stmt); | ||
247 | if (result != SQLITE_OK) | ||
248 | GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, | ||
249 | "sqlite", | ||
250 | "Failed to close statement %p: %d\n", | ||
251 | stmt, | ||
252 | result); | ||
253 | stmt = sqlite3_next_stmt (plugin->dbh, | ||
254 | NULL); | ||
255 | } | ||
256 | result = sqlite3_close (plugin->dbh); | ||
257 | } | ||
258 | if (SQLITE_OK != result) | ||
259 | LOG_SQLITE (plugin, | ||
260 | GNUNET_ERROR_TYPE_ERROR, | ||
261 | "sqlite3_close"); | ||
262 | |||
263 | GNUNET_free (plugin->fn); | ||
264 | } | ||
265 | |||
266 | |||
267 | /** | ||
268 | * Removes any expired block. | ||
269 | * | ||
270 | * @param plugin the plugin | ||
271 | */ | ||
272 | static void | ||
273 | namecache_sqlite_expire_blocks (struct Plugin *plugin) | ||
274 | { | ||
275 | struct GNUNET_TIME_Absolute now; | ||
276 | struct GNUNET_SQ_QueryParam params[] = { | ||
277 | GNUNET_SQ_query_param_absolute_time (&now), | ||
278 | GNUNET_SQ_query_param_end | ||
279 | }; | ||
280 | int n; | ||
281 | |||
282 | now = GNUNET_TIME_absolute_get (); | ||
283 | if (GNUNET_OK != | ||
284 | GNUNET_SQ_bind (plugin->expire_blocks, | ||
285 | params)) | ||
286 | { | ||
287 | LOG_SQLITE (plugin, | ||
288 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
289 | "sqlite3_bind_XXXX"); | ||
290 | GNUNET_SQ_reset (plugin->dbh, | ||
291 | plugin->expire_blocks); | ||
292 | return; | ||
293 | } | ||
294 | n = sqlite3_step (plugin->expire_blocks); | ||
295 | GNUNET_SQ_reset (plugin->dbh, | ||
296 | plugin->expire_blocks); | ||
297 | switch (n) | ||
298 | { | ||
299 | case SQLITE_DONE: | ||
300 | GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, | ||
301 | "sqlite", | ||
302 | "Records expired\n"); | ||
303 | return; | ||
304 | |||
305 | case SQLITE_BUSY: | ||
306 | LOG_SQLITE (plugin, | ||
307 | GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, | ||
308 | "sqlite3_step"); | ||
309 | return; | ||
310 | |||
311 | default: | ||
312 | LOG_SQLITE (plugin, | ||
313 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
314 | "sqlite3_step"); | ||
315 | return; | ||
316 | } | ||
317 | } | ||
318 | |||
319 | |||
320 | /** | ||
321 | * Cache a block in the datastore. | ||
322 | * | ||
323 | * @param cls closure (internal context for the plugin) | ||
324 | * @param block block to cache | ||
325 | * @return #GNUNET_OK on success, else #GNUNET_SYSERR | ||
326 | */ | ||
327 | static int | ||
328 | namecache_sqlite_cache_block (void *cls, | ||
329 | const struct GNUNET_GNSRECORD_Block *block) | ||
330 | { | ||
331 | static struct GNUNET_TIME_Absolute last_expire; | ||
332 | struct Plugin *plugin = cls; | ||
333 | struct GNUNET_HashCode query; | ||
334 | struct GNUNET_TIME_Absolute expiration; | ||
335 | size_t block_size = GNUNET_GNSRECORD_block_get_size (block); | ||
336 | struct GNUNET_SQ_QueryParam del_params[] = { | ||
337 | GNUNET_SQ_query_param_auto_from_type (&query), | ||
338 | GNUNET_SQ_query_param_absolute_time (&expiration), | ||
339 | GNUNET_SQ_query_param_end | ||
340 | }; | ||
341 | struct GNUNET_SQ_QueryParam ins_params[] = { | ||
342 | GNUNET_SQ_query_param_auto_from_type (&query), | ||
343 | GNUNET_SQ_query_param_fixed_size (block, | ||
344 | block_size), | ||
345 | GNUNET_SQ_query_param_absolute_time (&expiration), | ||
346 | GNUNET_SQ_query_param_end | ||
347 | }; | ||
348 | int n; | ||
349 | |||
350 | /* run expiration of old cache entries once per hour */ | ||
351 | if (GNUNET_TIME_absolute_get_duration (last_expire).rel_value_us > | ||
352 | GNUNET_TIME_UNIT_HOURS.rel_value_us) | ||
353 | { | ||
354 | last_expire = GNUNET_TIME_absolute_get (); | ||
355 | namecache_sqlite_expire_blocks (plugin); | ||
356 | } | ||
357 | GNUNET_assert (GNUNET_OK == | ||
358 | GNUNET_GNSRECORD_query_from_block (block, &query)); | ||
359 | expiration = GNUNET_GNSRECORD_block_get_expiration (block); | ||
360 | GNUNET_log (GNUNET_ERROR_TYPE_INFO, | ||
361 | "Caching new version of block %s (expires %s)\n", | ||
362 | GNUNET_h2s (&query), | ||
363 | GNUNET_STRINGS_absolute_time_to_string (expiration)); | ||
364 | if (block_size > 64 * 65536) | ||
365 | { | ||
366 | GNUNET_break (0); | ||
367 | return GNUNET_SYSERR; | ||
368 | } | ||
369 | |||
370 | /* delete old version of the block */ | ||
371 | if (GNUNET_OK != | ||
372 | GNUNET_SQ_bind (plugin->delete_block, | ||
373 | del_params)) | ||
374 | { | ||
375 | LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
376 | "sqlite3_bind_XXXX"); | ||
377 | GNUNET_SQ_reset (plugin->dbh, | ||
378 | plugin->delete_block); | ||
379 | return GNUNET_SYSERR; | ||
380 | } | ||
381 | n = sqlite3_step (plugin->delete_block); | ||
382 | switch (n) | ||
383 | { | ||
384 | case SQLITE_DONE: | ||
385 | GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, | ||
386 | "sqlite", | ||
387 | "Old block deleted\n"); | ||
388 | break; | ||
389 | |||
390 | case SQLITE_BUSY: | ||
391 | LOG_SQLITE (plugin, | ||
392 | GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, | ||
393 | "sqlite3_step"); | ||
394 | break; | ||
395 | |||
396 | default: | ||
397 | LOG_SQLITE (plugin, | ||
398 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
399 | "sqlite3_step"); | ||
400 | break; | ||
401 | } | ||
402 | GNUNET_SQ_reset (plugin->dbh, | ||
403 | plugin->delete_block); | ||
404 | |||
405 | /* insert new version of the block */ | ||
406 | if (GNUNET_OK != | ||
407 | GNUNET_SQ_bind (plugin->cache_block, | ||
408 | ins_params)) | ||
409 | { | ||
410 | LOG_SQLITE (plugin, | ||
411 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
412 | "sqlite3_bind_XXXX"); | ||
413 | GNUNET_SQ_reset (plugin->dbh, | ||
414 | plugin->cache_block); | ||
415 | return GNUNET_SYSERR; | ||
416 | } | ||
417 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
418 | "Caching block under derived key `%s'\n", | ||
419 | GNUNET_h2s_full (&query)); | ||
420 | n = sqlite3_step (plugin->cache_block); | ||
421 | GNUNET_SQ_reset (plugin->dbh, | ||
422 | plugin->cache_block); | ||
423 | switch (n) | ||
424 | { | ||
425 | case SQLITE_DONE: | ||
426 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
427 | "Record stored\n"); | ||
428 | return GNUNET_OK; | ||
429 | |||
430 | case SQLITE_BUSY: | ||
431 | LOG_SQLITE (plugin, | ||
432 | GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, | ||
433 | "sqlite3_step"); | ||
434 | return GNUNET_NO; | ||
435 | |||
436 | default: | ||
437 | LOG_SQLITE (plugin, | ||
438 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
439 | "sqlite3_step"); | ||
440 | return GNUNET_SYSERR; | ||
441 | } | ||
442 | } | ||
443 | |||
444 | |||
445 | /** | ||
446 | * Get the block for a particular zone and label in the | ||
447 | * datastore. Will return at most one result to the iterator. | ||
448 | * | ||
449 | * @param cls closure (internal context for the plugin) | ||
450 | * @param query hash of public key derived from the zone and the label | ||
451 | * @param iter function to call with the result | ||
452 | * @param iter_cls closure for @a iter | ||
453 | * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error | ||
454 | */ | ||
455 | static int | ||
456 | namecache_sqlite_lookup_block (void *cls, | ||
457 | const struct GNUNET_HashCode *query, | ||
458 | GNUNET_NAMECACHE_BlockCallback iter, | ||
459 | void *iter_cls) | ||
460 | { | ||
461 | struct Plugin *plugin = cls; | ||
462 | int ret; | ||
463 | int sret; | ||
464 | size_t block_size; | ||
465 | const struct GNUNET_GNSRECORD_Block *block; | ||
466 | struct GNUNET_SQ_QueryParam params[] = { | ||
467 | GNUNET_SQ_query_param_auto_from_type (query), | ||
468 | GNUNET_SQ_query_param_end | ||
469 | }; | ||
470 | struct GNUNET_SQ_ResultSpec rs[] = { | ||
471 | GNUNET_SQ_result_spec_variable_size ((void **) &block, | ||
472 | &block_size), | ||
473 | GNUNET_SQ_result_spec_end | ||
474 | }; | ||
475 | |||
476 | if (GNUNET_OK != | ||
477 | GNUNET_SQ_bind (plugin->lookup_block, | ||
478 | params)) | ||
479 | { | ||
480 | LOG_SQLITE (plugin, | ||
481 | GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
482 | "sqlite3_bind_XXXX"); | ||
483 | GNUNET_SQ_reset (plugin->dbh, | ||
484 | plugin->lookup_block); | ||
485 | return GNUNET_SYSERR; | ||
486 | } | ||
487 | ret = GNUNET_NO; | ||
488 | if (SQLITE_ROW == | ||
489 | (sret = sqlite3_step (plugin->lookup_block))) | ||
490 | { | ||
491 | if (GNUNET_OK != | ||
492 | GNUNET_SQ_extract_result (plugin->lookup_block, | ||
493 | rs)) | ||
494 | { | ||
495 | GNUNET_break (0); | ||
496 | ret = GNUNET_SYSERR; | ||
497 | } | ||
498 | else if ((block_size < sizeof(struct GNUNET_GNSRECORD_Block))) | ||
499 | { | ||
500 | GNUNET_break (0); | ||
501 | GNUNET_SQ_cleanup_result (rs); | ||
502 | ret = GNUNET_SYSERR; | ||
503 | } | ||
504 | else | ||
505 | { | ||
506 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
507 | "Found block under derived key `%s'\n", | ||
508 | GNUNET_h2s_full (query)); | ||
509 | iter (iter_cls, | ||
510 | block); | ||
511 | GNUNET_SQ_cleanup_result (rs); | ||
512 | ret = GNUNET_YES; | ||
513 | } | ||
514 | } | ||
515 | else | ||
516 | { | ||
517 | if (SQLITE_DONE != sret) | ||
518 | { | ||
519 | LOG_SQLITE (plugin, | ||
520 | GNUNET_ERROR_TYPE_ERROR, | ||
521 | "sqlite_step"); | ||
522 | ret = GNUNET_SYSERR; | ||
523 | } | ||
524 | else | ||
525 | { | ||
526 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
527 | "No block found under derived key `%s'\n", | ||
528 | GNUNET_h2s_full (query)); | ||
529 | } | ||
530 | } | ||
531 | GNUNET_SQ_reset (plugin->dbh, | ||
532 | plugin->lookup_block); | ||
533 | return ret; | ||
534 | } | ||
535 | |||
536 | |||
537 | /** | ||
538 | * Entry point for the plugin. | ||
539 | * | ||
540 | * @param cls the "struct GNUNET_NAMECACHE_PluginEnvironment*" | ||
541 | * @return NULL on error, otherwise the plugin context | ||
542 | */ | ||
543 | void * | ||
544 | libgnunet_plugin_namecache_sqlite_init (void *cls) | ||
545 | { | ||
546 | static struct Plugin plugin; | ||
547 | const struct GNUNET_CONFIGURATION_Handle *cfg = cls; | ||
548 | struct GNUNET_NAMECACHE_PluginFunctions *api; | ||
549 | |||
550 | if (NULL != plugin.cfg) | ||
551 | return NULL; /* can only initialize once! */ | ||
552 | memset (&plugin, 0, sizeof(struct Plugin)); | ||
553 | plugin.cfg = cfg; | ||
554 | if (GNUNET_OK != database_setup (&plugin)) | ||
555 | { | ||
556 | database_shutdown (&plugin); | ||
557 | return NULL; | ||
558 | } | ||
559 | api = GNUNET_new (struct GNUNET_NAMECACHE_PluginFunctions); | ||
560 | api->cls = &plugin; | ||
561 | api->cache_block = &namecache_sqlite_cache_block; | ||
562 | api->lookup_block = &namecache_sqlite_lookup_block; | ||
563 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
564 | _ ("Sqlite database running\n")); | ||
565 | return api; | ||
566 | } | ||
567 | |||
568 | |||
569 | /** | ||
570 | * Exit point from the plugin. | ||
571 | * | ||
572 | * @param cls the plugin context (as returned by "init") | ||
573 | * @return always NULL | ||
574 | */ | ||
575 | void * | ||
576 | libgnunet_plugin_namecache_sqlite_done (void *cls) | ||
577 | { | ||
578 | struct GNUNET_NAMECACHE_PluginFunctions *api = cls; | ||
579 | struct Plugin *plugin = api->cls; | ||
580 | |||
581 | database_shutdown (plugin); | ||
582 | plugin->cfg = NULL; | ||
583 | GNUNET_free (api); | ||
584 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
585 | "sqlite plugin is finished\n"); | ||
586 | return NULL; | ||
587 | } | ||
588 | |||
589 | |||
590 | /* end of plugin_namecache_sqlite.c */ | ||