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22 * @file namestore/plugin_namestore_postgres.c
23 * @brief postgres-based namestore backend
24 * @author Christian Grothoff
27 #include "gnunet_namestore_plugin.h"
28 #include "gnunet_namestore_service.h"
29 #include "gnunet_gnsrecord_lib.h"
30 #include "gnunet_pq_lib.h"
31 #include "namestore.h"
34 #define LOG(kind,...) GNUNET_log_from (kind, "namestore-postgres", __VA_ARGS__)
38 * Context for all functions in this plugin.
46 const struct GNUNET_CONFIGURATION_Handle *cfg;
49 * Native Postgres database handle.
57 * Initialize the database connections and associated
58 * data structures (create tables and indices
61 * @param plugin the plugin context (state for this module)
62 * @return #GNUNET_OK on success
65 database_setup (struct Plugin *plugin)
67 struct GNUNET_PQ_ExecuteStatement es_temporary =
68 GNUNET_PQ_make_execute ("CREATE TEMPORARY TABLE IF NOT EXISTS ns098records ("
69 " seq BIGSERIAL PRIMARY KEY,"
70 " zone_private_key BYTEA NOT NULL DEFAULT '',"
71 " pkey BYTEA DEFAULT '',"
72 " rvalue BYTEA NOT NULL DEFAULT '',"
73 " record_count INTEGER NOT NULL DEFAULT 0,"
74 " record_data BYTEA NOT NULL DEFAULT '',"
75 " label TEXT NOT NULL DEFAULT '',"
76 " CONSTRAINT zl UNIQUE (zone_private_key,label)"
79 struct GNUNET_PQ_ExecuteStatement es_default =
80 GNUNET_PQ_make_execute ("CREATE TABLE IF NOT EXISTS ns098records ("
81 " seq BIGSERIAL PRIMARY KEY,"
82 " zone_private_key BYTEA NOT NULL DEFAULT '',"
83 " pkey BYTEA DEFAULT '',"
84 " rvalue BYTEA NOT NULL DEFAULT '',"
85 " record_count INTEGER NOT NULL DEFAULT 0,"
86 " record_data BYTEA NOT NULL DEFAULT '',"
87 " label TEXT NOT NULL DEFAULT '',"
88 " CONSTRAINT zl UNIQUE (zone_private_key,label)"
91 const struct GNUNET_PQ_ExecuteStatement *cr;
93 plugin->dbh = GNUNET_PQ_connect_with_cfg (plugin->cfg,
94 "namestore-postgres");
95 if (NULL == plugin->dbh)
98 GNUNET_CONFIGURATION_get_value_yesno (plugin->cfg,
102 struct GNUNET_PQ_ExecuteStatement es[] = {
103 GNUNET_PQ_make_try_execute ("SET synchronous_commit TO off"),
104 GNUNET_PQ_EXECUTE_STATEMENT_END
108 GNUNET_PQ_exec_statements (plugin->dbh,
111 PQfinish (plugin->dbh);
113 return GNUNET_SYSERR;
117 GNUNET_CONFIGURATION_get_value_yesno (plugin->cfg,
118 "namestore-postgres",
129 struct GNUNET_PQ_ExecuteStatement es[] = {
131 GNUNET_PQ_make_try_execute ("CREATE INDEX IF NOT EXISTS ir_pkey_reverse "
132 "ON ns098records (zone_private_key,pkey)"),
133 GNUNET_PQ_make_try_execute ("CREATE INDEX IF NOT EXISTS ir_pkey_iter "
134 "ON ns098records (zone_private_key,seq)"),
135 GNUNET_PQ_make_try_execute ("CREATE INDEX IF NOT EXISTS ir_label "
136 "ON ns098records (label)"),
137 GNUNET_PQ_make_try_execute ("CREATE INDEX IF NOT EXISTS zone_label "
138 "ON ns098records (zone_private_key,label)"),
139 GNUNET_PQ_EXECUTE_STATEMENT_END
143 GNUNET_PQ_exec_statements (plugin->dbh,
146 PQfinish (plugin->dbh);
148 return GNUNET_SYSERR;
153 struct GNUNET_PQ_PreparedStatement ps[] = {
154 GNUNET_PQ_make_prepare ("store_records",
155 "INSERT INTO ns098records"
156 " (zone_private_key, pkey, rvalue, record_count, record_data, label)"
157 " VALUES ($1, $2, $3, $4, $5, $6)"
158 " ON CONFLICT ON CONSTRAINT zl"
160 " SET pkey=$2,rvalue=$3,record_count=$4,record_data=$5"
161 " WHERE ns098records.zone_private_key = $1"
162 " AND ns098records.label = $6",
164 GNUNET_PQ_make_prepare ("delete_records",
165 "DELETE FROM ns098records "
166 "WHERE zone_private_key=$1 AND label=$2",
168 GNUNET_PQ_make_prepare ("zone_to_name",
169 "SELECT seq,record_count,record_data,label FROM ns098records"
170 " WHERE zone_private_key=$1 AND pkey=$2",
172 GNUNET_PQ_make_prepare ("iterate_zone",
173 "SELECT seq,record_count,record_data,label FROM ns098records "
174 "WHERE zone_private_key=$1 AND seq > $2 ORDER BY seq ASC LIMIT $3",
176 GNUNET_PQ_make_prepare ("iterate_all_zones",
177 "SELECT seq,record_count,record_data,label,zone_private_key"
178 " FROM ns098records WHERE seq > $1 ORDER BY seq ASC LIMIT $2",
180 GNUNET_PQ_make_prepare ("lookup_label",
181 "SELECT seq,record_count,record_data,label "
182 "FROM ns098records WHERE zone_private_key=$1 AND label=$2",
184 GNUNET_PQ_PREPARED_STATEMENT_END
188 GNUNET_PQ_prepare_statements (plugin->dbh,
191 PQfinish (plugin->dbh);
193 return GNUNET_SYSERR;
202 * Store a record in the datastore. Removes any existing record in the
203 * same zone with the same name.
205 * @param cls closure (internal context for the plugin)
206 * @param zone_key private key of the zone
207 * @param label name that is being mapped (at most 255 characters long)
208 * @param rd_count number of entries in @a rd array
209 * @param rd array of records with data to store
210 * @return #GNUNET_OK on success, else #GNUNET_SYSERR
213 namestore_postgres_store_records (void *cls,
214 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
216 unsigned int rd_count,
217 const struct GNUNET_GNSRECORD_Data *rd)
219 struct Plugin *plugin = cls;
220 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
222 uint32_t rd_count32 = (uint32_t) rd_count;
228 for (unsigned int i=0;i<rd_count;i++)
229 if (GNUNET_GNSRECORD_TYPE_PKEY == rd[i].record_type)
231 GNUNET_break (sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey) == rd[i].data_size);
232 GNUNET_memcpy (&pkey,
237 rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
239 data_size = GNUNET_GNSRECORD_records_get_size (rd_count,
241 if (data_size > 64 * 65536)
244 return GNUNET_SYSERR;
246 /* if record set is empty, delete existing records */
249 struct GNUNET_PQ_QueryParam params[] = {
250 GNUNET_PQ_query_param_auto_from_type (zone_key),
251 GNUNET_PQ_query_param_string (label),
252 GNUNET_PQ_query_param_end
254 enum GNUNET_DB_QueryStatus res;
256 res = GNUNET_PQ_eval_prepared_non_select (plugin->dbh,
259 if ( (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != res) &&
260 (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != res) )
263 return GNUNET_SYSERR;
265 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
270 /* otherwise, UPSERT (i.e. UPDATE if exists, otherwise INSERT) */
272 char data[data_size];
273 struct GNUNET_PQ_QueryParam params[] = {
274 GNUNET_PQ_query_param_auto_from_type (zone_key),
275 GNUNET_PQ_query_param_auto_from_type (&pkey),
276 GNUNET_PQ_query_param_uint64 (&rvalue),
277 GNUNET_PQ_query_param_uint32 (&rd_count32),
278 GNUNET_PQ_query_param_fixed_size (data, data_size),
279 GNUNET_PQ_query_param_string (label),
280 GNUNET_PQ_query_param_end
282 enum GNUNET_DB_QueryStatus res;
285 ret = GNUNET_GNSRECORD_records_serialize (rd_count,
290 (data_size != (size_t) ret) )
293 return GNUNET_SYSERR;
296 res = GNUNET_PQ_eval_prepared_non_select (plugin->dbh,
299 if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != res)
300 return GNUNET_SYSERR;
307 * Closure for #parse_result_call_iterator.
312 * Function to call for each result.
314 GNUNET_NAMESTORE_RecordIterator iter;
317 * Closure for @e iter.
322 * Zone key, NULL if part of record.
324 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key;
327 * Number of results still to return (counted down by
328 * number of results given to iterator).
335 * A statement has been run. We should evaluate the result, and if possible
336 * call the @a iter in @a cls with the result.
338 * @param cls closure of type `struct ParserContext *`
339 * @param result the postgres result
340 * @param num_result the number of results in @a result
343 parse_result_call_iterator (void *cls,
345 unsigned int num_results)
347 struct ParserContext *pc = cls;
349 if (NULL == pc->iter)
350 return; /* no need to do more work */
351 for (unsigned int i=0;i<num_results;i++)
356 uint32_t record_count;
358 struct GNUNET_CRYPTO_EcdsaPrivateKey zk;
359 struct GNUNET_PQ_ResultSpec rs_with_zone[] = {
360 GNUNET_PQ_result_spec_uint64 ("seq", &serial),
361 GNUNET_PQ_result_spec_uint32 ("record_count", &record_count),
362 GNUNET_PQ_result_spec_variable_size ("record_data", &data, &data_size),
363 GNUNET_PQ_result_spec_string ("label", &label),
364 GNUNET_PQ_result_spec_auto_from_type ("zone_private_key", &zk),
365 GNUNET_PQ_result_spec_end
367 struct GNUNET_PQ_ResultSpec rs_without_zone[] = {
368 GNUNET_PQ_result_spec_uint64 ("seq", &serial),
369 GNUNET_PQ_result_spec_uint32 ("record_count", &record_count),
370 GNUNET_PQ_result_spec_variable_size ("record_data", &data, &data_size),
371 GNUNET_PQ_result_spec_string ("label", &label),
372 GNUNET_PQ_result_spec_end
374 struct GNUNET_PQ_ResultSpec *rs;
376 rs = (NULL == pc->zone_key) ? rs_with_zone : rs_without_zone;
378 GNUNET_PQ_extract_result (res,
386 if (record_count > 64 * 1024)
388 /* sanity check, don't stack allocate far too much just
389 because database might contain a large value here */
391 GNUNET_PQ_cleanup_result (rs);
396 struct GNUNET_GNSRECORD_Data rd[GNUNET_NZL(record_count)];
399 GNUNET_GNSRECORD_records_deserialize (data_size,
405 GNUNET_PQ_cleanup_result (rs);
408 pc->iter (pc->iter_cls,
410 (NULL == pc->zone_key) ? &zk : pc->zone_key,
415 GNUNET_PQ_cleanup_result (rs);
417 pc->limit -= num_results;
422 * Lookup records in the datastore for which we are the authority.
424 * @param cls closure (internal context for the plugin)
425 * @param zone private key of the zone
426 * @param label name of the record in the zone
427 * @param iter function to call with the result
428 * @param iter_cls closure for @a iter
429 * @return #GNUNET_OK on success, #GNUNET_NO for no results, else #GNUNET_SYSERR
432 namestore_postgres_lookup_records (void *cls,
433 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
435 GNUNET_NAMESTORE_RecordIterator iter,
438 struct Plugin *plugin = cls;
439 struct GNUNET_PQ_QueryParam params[] = {
440 GNUNET_PQ_query_param_auto_from_type (zone),
441 GNUNET_PQ_query_param_string (label),
442 GNUNET_PQ_query_param_end
444 struct ParserContext pc;
445 enum GNUNET_DB_QueryStatus res;
450 return GNUNET_SYSERR;
453 pc.iter_cls = iter_cls;
455 res = GNUNET_PQ_eval_prepared_multi_select (plugin->dbh,
458 &parse_result_call_iterator,
461 return GNUNET_SYSERR;
462 if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == res)
469 * Iterate over the results for a particular key and zone in the
470 * datastore. Will return at most one result to the iterator.
472 * @param cls closure (internal context for the plugin)
473 * @param zone hash of public key of the zone, NULL to iterate over all zones
474 * @param serial serial number to exclude in the list of all matching records
475 * @param limit maximum number of results to fetch
476 * @param iter function to call with the result
477 * @param iter_cls closure for @a iter
478 * @return #GNUNET_OK on success, #GNUNET_NO if there were no more results, #GNUNET_SYSERR on error
481 namestore_postgres_iterate_records (void *cls,
482 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
485 GNUNET_NAMESTORE_RecordIterator iter,
488 struct Plugin *plugin = cls;
489 enum GNUNET_DB_QueryStatus res;
490 struct ParserContext pc;
493 pc.iter_cls = iter_cls;
498 struct GNUNET_PQ_QueryParam params_without_zone[] = {
499 GNUNET_PQ_query_param_uint64 (&serial),
500 GNUNET_PQ_query_param_uint64 (&limit),
501 GNUNET_PQ_query_param_end
504 res = GNUNET_PQ_eval_prepared_multi_select (plugin->dbh,
507 &parse_result_call_iterator,
512 struct GNUNET_PQ_QueryParam params_with_zone[] = {
513 GNUNET_PQ_query_param_auto_from_type (zone),
514 GNUNET_PQ_query_param_uint64 (&serial),
515 GNUNET_PQ_query_param_uint64 (&limit),
516 GNUNET_PQ_query_param_end
519 res = GNUNET_PQ_eval_prepared_multi_select (plugin->dbh,
522 &parse_result_call_iterator,
526 return GNUNET_SYSERR;
528 if ( (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == res) ||
536 * Look for an existing PKEY delegation record for a given public key.
537 * Returns at most one result to the iterator.
539 * @param cls closure (internal context for the plugin)
540 * @param zone private key of the zone to look up in, never NULL
541 * @param value_zone public key of the target zone (value), never NULL
542 * @param iter function to call with the result
543 * @param iter_cls closure for @a iter
544 * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error
547 namestore_postgres_zone_to_name (void *cls,
548 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
549 const struct GNUNET_CRYPTO_EcdsaPublicKey *value_zone,
550 GNUNET_NAMESTORE_RecordIterator iter, void *iter_cls)
552 struct Plugin *plugin = cls;
553 struct GNUNET_PQ_QueryParam params[] = {
554 GNUNET_PQ_query_param_auto_from_type (zone),
555 GNUNET_PQ_query_param_auto_from_type (value_zone),
556 GNUNET_PQ_query_param_end
558 enum GNUNET_DB_QueryStatus res;
559 struct ParserContext pc;
562 pc.iter_cls = iter_cls;
564 res = GNUNET_PQ_eval_prepared_multi_select (plugin->dbh,
567 &parse_result_call_iterator,
570 return GNUNET_SYSERR;
576 * Shutdown database connection and associate data
579 * @param plugin the plugin context (state for this module)
582 database_shutdown (struct Plugin *plugin)
584 PQfinish (plugin->dbh);
590 * Entry point for the plugin.
592 * @param cls the `struct GNUNET_NAMESTORE_PluginEnvironment*`
593 * @return NULL on error, othrewise the plugin context
596 libgnunet_plugin_namestore_postgres_init (void *cls)
598 static struct Plugin plugin;
599 const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
600 struct GNUNET_NAMESTORE_PluginFunctions *api;
602 if (NULL != plugin.cfg)
603 return NULL; /* can only initialize once! */
604 memset (&plugin, 0, sizeof (struct Plugin));
606 if (GNUNET_OK != database_setup (&plugin))
608 database_shutdown (&plugin);
611 api = GNUNET_new (struct GNUNET_NAMESTORE_PluginFunctions);
613 api->store_records = &namestore_postgres_store_records;
614 api->iterate_records = &namestore_postgres_iterate_records;
615 api->zone_to_name = &namestore_postgres_zone_to_name;
616 api->lookup_records = &namestore_postgres_lookup_records;
617 LOG (GNUNET_ERROR_TYPE_INFO,
618 "Postgres namestore plugin running\n");
624 * Exit point from the plugin.
626 * @param cls the plugin context (as returned by "init")
627 * @return always NULL
630 libgnunet_plugin_namestore_postgres_done (void *cls)
632 struct GNUNET_NAMESTORE_PluginFunctions *api = cls;
633 struct Plugin *plugin = api->cls;
635 database_shutdown (plugin);
638 LOG (GNUNET_ERROR_TYPE_DEBUG,
639 "Postgres namestore plugin is finished\n");
643 /* end of plugin_namestore_postgres.c */