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diff --git a/src/datastore/gnunet-service-datastore.c b/src/datastore/gnunet-service-datastore.c
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1/*
2 This file is part of GNUnet
3 Copyright (C) 2004-2014, 2016 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 datastore/gnunet-service-datastore.c
23 * @brief Management for the datastore for files stored on a GNUnet node
24 * @author Christian Grothoff
25 */
26
27#include "platform.h"
28#include "gnunet_util_lib.h"
29#include "gnunet_protocols.h"
30#include "gnunet_statistics_service.h"
31#include "gnunet_datastore_plugin.h"
32#include "datastore.h"
33
34/**
35 * How many messages do we queue at most per client?
36 */
37#define MAX_PENDING 1024
38
39/**
40 * Limit size of bloom filter to 2 GB.
41 */
42#define MAX_BF_SIZE ((uint32_t) (1LL << 31))
43
44/**
45 * How long are we at most keeping "expired" content
46 * past the expiration date in the database?
47 */
48#define MAX_EXPIRE_DELAY \
49 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
50
51/**
52 * How fast are we allowed to query the database for deleting
53 * expired content? (1 item per second).
54 */
55#define MIN_EXPIRE_DELAY \
56 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
57
58/**
59 * Name under which we store current space consumption.
60 */
61static char *quota_stat_name;
62
63/**
64 * Task to timeout stat GET.
65 */
66static struct GNUNET_SCHEDULER_Task *stat_timeout_task;
67
68/**
69 * After how many payload-changing operations
70 * do we sync our statistics?
71 */
72#define MAX_STAT_SYNC_LAG 50
73
74
75/**
76 * Our datastore plugin.
77 */
78struct DatastorePlugin
79{
80 /**
81 * API of the transport as returned by the plugin's
82 * initialization function.
83 */
84 struct GNUNET_DATASTORE_PluginFunctions *api;
85
86 /**
87 * Short name for the plugin (e.g. "sqlite").
88 */
89 char *short_name;
90
91 /**
92 * Name of the library (e.g. "gnunet_plugin_datastore_sqlite").
93 */
94 char *lib_name;
95
96 /**
97 * Environment this transport service is using
98 * for this plugin.
99 */
100 struct GNUNET_DATASTORE_PluginEnvironment env;
101};
102
103
104/**
105 * Linked list of active reservations.
106 */
107struct ReservationList
108{
109 /**
110 * This is a linked list.
111 */
112 struct ReservationList *next;
113
114 /**
115 * Client that made the reservation.
116 */
117 struct GNUNET_SERVICE_Client *client;
118
119 /**
120 * Number of bytes (still) reserved.
121 */
122 uint64_t amount;
123
124 /**
125 * Number of items (still) reserved.
126 */
127 uint64_t entries;
128
129 /**
130 * Reservation identifier.
131 */
132 int32_t rid;
133};
134
135
136/**
137 * Our datastore plugin (NULL if not available).
138 */
139static struct DatastorePlugin *plugin;
140
141/**
142 * Linked list of space reservations made by clients.
143 */
144static struct ReservationList *reservations;
145
146/**
147 * Bloomfilter to quickly tell if we don't have the content.
148 */
149static struct GNUNET_CONTAINER_BloomFilter *filter;
150
151/**
152 * Name of our plugin.
153 */
154static char *plugin_name;
155
156/**
157 * Our configuration.
158 */
159static const struct GNUNET_CONFIGURATION_Handle *cfg;
160
161/**
162 * Handle for reporting statistics.
163 */
164static struct GNUNET_STATISTICS_Handle *stats;
165
166/**
167 * How much space are we using for the cache? (space available for
168 * insertions that will be instantly reclaimed by discarding less
169 * important content --- or possibly whatever we just inserted into
170 * the "cache").
171 */
172static unsigned long long cache_size;
173
174/**
175 * How much space have we currently reserved?
176 */
177static unsigned long long reserved;
178
179/**
180 * How much data are we currently storing
181 * in the database?
182 */
183static unsigned long long payload;
184
185/**
186 * Identity of the task that is used to delete
187 * expired content.
188 */
189static struct GNUNET_SCHEDULER_Task *expired_kill_task;
190
191/**
192 * Minimum time that content should have to not be discarded instantly
193 * (time stamp of any content that we've been discarding recently to
194 * stay below the quota). FOREVER if we had to expire content with
195 * non-zero priority.
196 */
197static struct GNUNET_TIME_Absolute min_expiration;
198
199/**
200 * How much space are we allowed to use?
201 */
202static unsigned long long quota;
203
204/**
205 * Should the database be dropped on exit?
206 */
207static int do_drop;
208
209/**
210 * Should we refresh the BF when the DB is loaded?
211 */
212static int refresh_bf;
213
214/**
215 * Number of updates that were made to the
216 * payload value since we last synchronized
217 * it with the statistics service.
218 */
219static unsigned int last_sync;
220
221/**
222 * Did we get an answer from statistics?
223 */
224static int stats_worked;
225
226
227/**
228 * Synchronize our utilization statistics with the
229 * statistics service.
230 */
231static void
232sync_stats ()
233{
234 GNUNET_STATISTICS_set (stats, quota_stat_name, payload, GNUNET_YES);
235 GNUNET_STATISTICS_set (stats,
236 "# utilization by current datastore",
237 payload,
238 GNUNET_NO);
239 last_sync = 0;
240}
241
242
243/**
244 * Have we already cleaned up the TCCs and are hence no longer
245 * willing (or able) to transmit anything to anyone?
246 */
247static int cleaning_done;
248
249/**
250 * Handle for pending get request.
251 */
252static struct GNUNET_STATISTICS_GetHandle *stat_get;
253
254/**
255 * Handle to our server.
256 */
257static struct GNUNET_SERVICE_Handle *service;
258
259/**
260 * Task that is used to remove expired entries from
261 * the datastore. This task will schedule itself
262 * again automatically to always delete all expired
263 * content quickly.
264 *
265 * @param cls not used
266 */
267static void
268delete_expired (void *cls);
269
270
271/**
272 * Iterate over the expired items stored in the datastore.
273 * Delete all expired items; once we have processed all
274 * expired items, re-schedule the "delete_expired" task.
275 *
276 * @param cls not used
277 * @param key key for the content
278 * @param size number of bytes in data
279 * @param data content stored
280 * @param type type of the content
281 * @param priority priority of the content
282 * @param anonymity anonymity-level for the content
283 * @param replication replication-level for the content
284 * @param expiration expiration time for the content
285 * @param uid unique identifier for the datum;
286 * maybe 0 if no unique identifier is available
287 *
288 * @return #GNUNET_SYSERR to abort the iteration, #GNUNET_OK to continue
289 * (continue on call to "next", of course),
290 * #GNUNET_NO to delete the item and continue (if supported)
291 */
292static int
293expired_processor (void *cls,
294 const struct GNUNET_HashCode *key,
295 uint32_t size,
296 const void *data,
297 enum GNUNET_BLOCK_Type type,
298 uint32_t priority,
299 uint32_t anonymity,
300 uint32_t replication,
301 struct GNUNET_TIME_Absolute expiration,
302 uint64_t uid)
303{
304 struct GNUNET_TIME_Absolute now;
305
306 if (NULL == key)
307 {
308 expired_kill_task =
309 GNUNET_SCHEDULER_add_delayed_with_priority (MAX_EXPIRE_DELAY,
310 GNUNET_SCHEDULER_PRIORITY_IDLE,
311 &delete_expired,
312 NULL);
313 return GNUNET_SYSERR;
314 }
315 now = GNUNET_TIME_absolute_get ();
316 if (expiration.abs_value_us > now.abs_value_us)
317 {
318 /* finished processing */
319 expired_kill_task =
320 GNUNET_SCHEDULER_add_delayed_with_priority (MAX_EXPIRE_DELAY,
321 GNUNET_SCHEDULER_PRIORITY_IDLE,
322 &delete_expired,
323 NULL);
324 return GNUNET_SYSERR;
325 }
326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
327 "Deleting content `%s' of type %u that expired %s ago\n",
328 GNUNET_h2s (key),
329 type,
330 GNUNET_STRINGS_relative_time_to_string (
331 GNUNET_TIME_absolute_get_difference (expiration, now),
332 GNUNET_YES));
333 min_expiration = now;
334 GNUNET_STATISTICS_update (stats,
335 gettext_noop ("# bytes expired"),
336 size,
337 GNUNET_YES);
338 GNUNET_CONTAINER_bloomfilter_remove (filter, key);
339 expired_kill_task =
340 GNUNET_SCHEDULER_add_delayed_with_priority (MIN_EXPIRE_DELAY,
341 GNUNET_SCHEDULER_PRIORITY_IDLE,
342 &delete_expired,
343 NULL);
344 return GNUNET_NO;
345}
346
347
348/**
349 * Task that is used to remove expired entries from
350 * the datastore. This task will schedule itself
351 * again automatically to always delete all expired
352 * content quickly.
353 *
354 * @param cls not used
355 */
356static void
357delete_expired (void *cls)
358{
359 expired_kill_task = NULL;
360 plugin->api->get_expiration (plugin->api->cls, &expired_processor, NULL);
361}
362
363
364/**
365 * An iterator over a set of items stored in the datastore
366 * that deletes until we're happy with respect to our quota.
367 *
368 * @param cls closure
369 * @param key key for the content
370 * @param size number of bytes in data
371 * @param data content stored
372 * @param type type of the content
373 * @param priority priority of the content
374 * @param anonymity anonymity-level for the content
375 * @param replication replication-level for the content
376 * @param expiration expiration time for the content
377 * @param uid unique identifier for the datum;
378 * maybe 0 if no unique identifier is available
379 * @return #GNUNET_SYSERR to abort the iteration, #GNUNET_OK to continue
380 * (continue on call to "next", of course),
381 * #GNUNET_NO to delete the item and continue (if supported)
382 */
383static int
384quota_processor (void *cls,
385 const struct GNUNET_HashCode *key,
386 uint32_t size,
387 const void *data,
388 enum GNUNET_BLOCK_Type type,
389 uint32_t priority,
390 uint32_t anonymity,
391 uint32_t replication,
392 struct GNUNET_TIME_Absolute expiration,
393 uint64_t uid)
394{
395 unsigned long long *need = cls;
396
397 if (NULL == key)
398 return GNUNET_SYSERR;
399 GNUNET_log (
400 GNUNET_ERROR_TYPE_DEBUG,
401 "Deleting %llu bytes of low-priority (%u) content `%s' of type %u at %s prior to expiration (still trying to free another %llu bytes)\n",
402 (unsigned long long) (size + GNUNET_DATASTORE_ENTRY_OVERHEAD),
403 (unsigned int) priority,
404 GNUNET_h2s (key),
405 type,
406 GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (
407 expiration),
408 GNUNET_YES),
409 *need);
410 if (size + GNUNET_DATASTORE_ENTRY_OVERHEAD > *need)
411 *need = 0;
412 else
413 *need -= size + GNUNET_DATASTORE_ENTRY_OVERHEAD;
414 if (priority > 0)
415 min_expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
416 else
417 min_expiration = expiration;
418 GNUNET_STATISTICS_update (stats,
419 gettext_noop ("# bytes purged (low-priority)"),
420 size,
421 GNUNET_YES);
422 GNUNET_CONTAINER_bloomfilter_remove (filter, key);
423 return GNUNET_NO;
424}
425
426
427/**
428 * Manage available disk space by running tasks
429 * that will discard content if necessary. This
430 * function will be run whenever a request for
431 * "need" bytes of storage could only be satisfied
432 * by eating into the "cache" (and we want our cache
433 * space back).
434 *
435 * @param need number of bytes of content that were
436 * placed into the "cache" (and hence the
437 * number of bytes that should be removed).
438 */
439static void
440manage_space (unsigned long long need)
441{
442 unsigned long long last;
443
444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
445 "Asked to free up %llu bytes of cache space\n",
446 need);
447 last = 0;
448 while ((need > 0) && (last != need))
449 {
450 last = need;
451 plugin->api->get_expiration (plugin->api->cls, &quota_processor, &need);
452 }
453}
454
455
456/**
457 * Transmit a status code to the client.
458 *
459 * @param client receiver of the response
460 * @param code status code
461 * @param msg optional error message (can be NULL)
462 */
463static void
464transmit_status (struct GNUNET_SERVICE_Client *client,
465 int code,
466 const char *msg)
467{
468 struct GNUNET_MQ_Envelope *env;
469 struct StatusMessage *sm;
470 size_t slen;
471
472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
473 "Transmitting `%s' message with value %d and message `%s'\n",
474 "STATUS",
475 code,
476 msg != NULL ? msg : "(none)");
477 slen = (msg == NULL) ? 0 : strlen (msg) + 1;
478 env = GNUNET_MQ_msg_extra (sm, slen, GNUNET_MESSAGE_TYPE_DATASTORE_STATUS);
479 sm->status = htonl (code);
480 sm->min_expiration = GNUNET_TIME_absolute_hton (min_expiration);
481 GNUNET_memcpy (&sm[1], msg, slen);
482 GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
483}
484
485
486/**
487 * Function that will transmit the given datastore entry
488 * to the client.
489 *
490 * @param cls closure, pointer to the client (of type `struct GNUNET_SERVICE_Client`).
491 * @param key key for the content
492 * @param size number of bytes in data
493 * @param data content stored
494 * @param type type of the content
495 * @param priority priority of the content
496 * @param anonymity anonymity-level for the content
497 * @param replication replication-level for the content
498 * @param expiration expiration time for the content
499 * @param uid unique identifier for the datum;
500 * maybe 0 if no unique identifier is available
501 * @return #GNUNET_SYSERR to abort the iteration, #GNUNET_OK to continue,
502 * #GNUNET_NO to delete the item and continue (if supported)
503 */
504static int
505transmit_item (void *cls,
506 const struct GNUNET_HashCode *key,
507 uint32_t size,
508 const void *data,
509 enum GNUNET_BLOCK_Type type,
510 uint32_t priority,
511 uint32_t anonymity,
512 uint32_t replication,
513 struct GNUNET_TIME_Absolute expiration,
514 uint64_t uid)
515{
516 struct GNUNET_SERVICE_Client *client = cls;
517 struct GNUNET_MQ_Envelope *env;
518 struct GNUNET_MessageHeader *end;
519 struct DataMessage *dm;
520
521 if (NULL == key)
522 {
523 /* transmit 'DATA_END' */
524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transmitting DATA_END message\n");
525 env = GNUNET_MQ_msg (end, GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END);
526 GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
527 return GNUNET_OK;
528 }
529 GNUNET_assert (sizeof(struct DataMessage) + size < GNUNET_MAX_MESSAGE_SIZE);
530 env = GNUNET_MQ_msg_extra (dm, size, GNUNET_MESSAGE_TYPE_DATASTORE_DATA);
531 dm->rid = htonl (0);
532 dm->size = htonl (size);
533 dm->type = htonl (type);
534 dm->priority = htonl (priority);
535 dm->anonymity = htonl (anonymity);
536 dm->replication = htonl (replication);
537 dm->expiration = GNUNET_TIME_absolute_hton (expiration);
538 dm->uid = GNUNET_htonll (uid);
539 dm->key = *key;
540 GNUNET_memcpy (&dm[1], data, size);
541 GNUNET_log (
542 GNUNET_ERROR_TYPE_DEBUG,
543 "Transmitting DATA message for `%s' of type %u with expiration %s (in: %s)\n",
544 GNUNET_h2s (key),
545 type,
546 GNUNET_STRINGS_absolute_time_to_string (expiration),
547 GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (
548 expiration),
549 GNUNET_YES));
550 GNUNET_STATISTICS_update (stats,
551 gettext_noop ("# results found"),
552 1,
553 GNUNET_NO);
554 GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
555 return GNUNET_OK;
556}
557
558
559/**
560 * Handle RESERVE-message.
561 *
562 * @param cls identification of the client
563 * @param message the actual message
564 */
565static void
566handle_reserve (void *cls, const struct ReserveMessage *msg)
567{
568 /**
569 * Static counter to produce reservation identifiers.
570 */
571 static int reservation_gen;
572 struct GNUNET_SERVICE_Client *client = cls;
573 struct ReservationList *e;
574 unsigned long long used;
575 unsigned long long req;
576 uint64_t amount;
577 uint32_t entries;
578
579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing RESERVE request\n");
580 amount = GNUNET_ntohll (msg->amount);
581 entries = ntohl (msg->entries);
582 used = payload + reserved;
583 req =
584 amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * entries;
585 if (used + req > quota)
586 {
587 if (quota < used)
588 used =
589 quota; /* cheat a bit for error message (to avoid negative numbers) */
590 GNUNET_log (
591 GNUNET_ERROR_TYPE_WARNING,
592 _ (
593 "Insufficient space (%llu bytes are available) to satisfy RESERVE request for %llu bytes\n"),
594 quota - used,
595 req);
596 if (cache_size < req)
597 {
598 /* TODO: document this in the FAQ; essentially, if this
599 * message happens, the insertion request could be blocked
600 * by less-important content from migration because it is
601 * larger than 1/8th of the overall available space, and
602 * we only reserve 1/8th for "fresh" insertions */GNUNET_log (
603 GNUNET_ERROR_TYPE_WARNING,
604 _ (
605 "The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"),
606 req,
607 cache_size);
608 transmit_status (client,
609 0,
610 gettext_noop (
611 "Insufficient space to satisfy request and "
612 "requested amount is larger than cache size"));
613 }
614 else
615 {
616 transmit_status (client,
617 0,
618 gettext_noop ("Insufficient space to satisfy request"));
619 }
620 GNUNET_SERVICE_client_continue (client);
621 return;
622 }
623 reserved += req;
624 GNUNET_STATISTICS_set (stats,
625 gettext_noop ("# reserved"),
626 reserved,
627 GNUNET_NO);
628 e = GNUNET_new (struct ReservationList);
629 e->next = reservations;
630 reservations = e;
631 e->client = client;
632 e->amount = amount;
633 e->entries = entries;
634 e->rid = ++reservation_gen;
635 if (reservation_gen < 0)
636 reservation_gen = 0; /* wrap around */
637 transmit_status (client, e->rid, NULL);
638 GNUNET_SERVICE_client_continue (client);
639}
640
641
642/**
643 * Handle RELEASE_RESERVE-message.
644 *
645 * @param cls identification of the client
646 * @param message the actual message
647 */
648static void
649handle_release_reserve (void *cls, const struct ReleaseReserveMessage *msg)
650{
651 struct GNUNET_SERVICE_Client *client = cls;
652 struct ReservationList *pos;
653 struct ReservationList *prev;
654 struct ReservationList *next;
655 int rid = ntohl (msg->rid);
656 unsigned long long rem;
657
658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing RELEASE_RESERVE request\n");
659 next = reservations;
660 prev = NULL;
661 while (NULL != (pos = next))
662 {
663 next = pos->next;
664 if (rid == pos->rid)
665 {
666 if (prev == NULL)
667 reservations = next;
668 else
669 prev->next = next;
670 rem =
671 pos->amount
672 + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries;
673 GNUNET_assert (reserved >= rem);
674 reserved -= rem;
675 GNUNET_STATISTICS_set (stats,
676 gettext_noop ("# reserved"),
677 reserved,
678 GNUNET_NO);
679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
680 "Returning %llu remaining reserved bytes to storage pool\n",
681 rem);
682 GNUNET_free (pos);
683 transmit_status (client, GNUNET_OK, NULL);
684 GNUNET_SERVICE_client_continue (client);
685 return;
686 }
687 prev = pos;
688 }
689 GNUNET_break (0);
690 transmit_status (client,
691 GNUNET_SYSERR,
692 gettext_noop ("Could not find matching reservation"));
693 GNUNET_SERVICE_client_continue (client);
694}
695
696
697/**
698 * Check that the given message is a valid data message.
699 *
700 * @param dm message to check
701 * @return #GNUNET_SYSERR is not well-formed, otherwise #GNUNET_OK
702 */
703static int
704check_data (const struct DataMessage *dm)
705{
706 uint16_t size;
707 uint32_t dsize;
708
709 size = ntohs (dm->header.size);
710 dsize = ntohl (dm->size);
711 if (size != dsize + sizeof(struct DataMessage))
712 {
713 GNUNET_break (0);
714 return GNUNET_SYSERR;
715 }
716 return GNUNET_OK;
717}
718
719
720/**
721 * Put continuation.
722 *
723 * @param cls closure
724 * @param key key for the item stored
725 * @param size size of the item stored
726 * @param status #GNUNET_OK if inserted, #GNUNET_NO if updated,
727 * or #GNUNET_SYSERROR if error
728 * @param msg error message on error
729 */
730static void
731put_continuation (void *cls,
732 const struct GNUNET_HashCode *key,
733 uint32_t size,
734 int status,
735 const char *msg)
736{
737 struct GNUNET_SERVICE_Client *client = cls;
738
739 if (GNUNET_OK == status)
740 {
741 GNUNET_STATISTICS_update (stats,
742 gettext_noop ("# bytes stored"),
743 size,
744 GNUNET_YES);
745 GNUNET_CONTAINER_bloomfilter_add (filter, key);
746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
747 "Successfully stored %u bytes under key `%s'\n",
748 size,
749 GNUNET_h2s (key));
750 }
751 transmit_status (client,
752 GNUNET_SYSERR == status ? GNUNET_SYSERR : GNUNET_OK,
753 msg);
754 if (quota - reserved - cache_size < payload)
755 {
756 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
757 _ ("Need %llu bytes more space (%llu allowed, using %llu)\n"),
758 (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
759 (unsigned long long) (quota - reserved - cache_size),
760 (unsigned long long) payload);
761 manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
762 }
763}
764
765
766/**
767 * Verify PUT-message.
768 *
769 * @param cls identification of the client
770 * @param message the actual message
771 * @return #GNUNET_OK if @a dm is well-formed
772 */
773static int
774check_put (void *cls, const struct DataMessage *dm)
775{
776 if (GNUNET_OK != check_data (dm))
777 {
778 GNUNET_break (0);
779 return GNUNET_SYSERR;
780 }
781 return GNUNET_OK;
782}
783
784
785/**
786 * Handle PUT-message.
787 *
788 * @param cls identification of the client
789 * @param message the actual message
790 */
791static void
792handle_put (void *cls, const struct DataMessage *dm)
793{
794 struct GNUNET_SERVICE_Client *client = cls;
795 int rid;
796 struct ReservationList *pos;
797 uint32_t size;
798
799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
800 "Processing PUT request for `%s' of type %u\n",
801 GNUNET_h2s (&dm->key),
802 (uint32_t) ntohl (dm->type));
803 rid = ntohl (dm->rid);
804 size = ntohl (dm->size);
805 if (rid > 0)
806 {
807 pos = reservations;
808 while ((NULL != pos) && (rid != pos->rid))
809 pos = pos->next;
810 GNUNET_break (pos != NULL);
811 if (NULL != pos)
812 {
813 GNUNET_break (pos->entries > 0);
814 GNUNET_break (pos->amount >= size);
815 pos->entries--;
816 pos->amount -= size;
817 reserved -= (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
818 GNUNET_STATISTICS_set (stats,
819 gettext_noop ("# reserved"),
820 reserved,
821 GNUNET_NO);
822 }
823 }
824 bool absent =
825 GNUNET_NO == GNUNET_CONTAINER_bloomfilter_test (filter, &dm->key);
826 plugin->api->put (plugin->api->cls,
827 &dm->key,
828 absent,
829 ntohl (dm->size),
830 &dm[1],
831 ntohl (dm->type),
832 ntohl (dm->priority),
833 ntohl (dm->anonymity),
834 ntohl (dm->replication),
835 GNUNET_TIME_absolute_ntoh (dm->expiration),
836 &put_continuation,
837 client);
838 GNUNET_SERVICE_client_continue (client);
839}
840
841
842/**
843 * Handle #GNUNET_MESSAGE_TYPE_DATASTORE_GET-message.
844 *
845 * @param cls identification of the client
846 * @param msg the actual message
847 */
848static void
849handle_get (void *cls, const struct GetMessage *msg)
850{
851 struct GNUNET_SERVICE_Client *client = cls;
852
853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
854 "Processing GET request of type %u\n",
855 (uint32_t) ntohl (msg->type));
856 GNUNET_STATISTICS_update (stats,
857 gettext_noop ("# GET requests received"),
858 1,
859 GNUNET_NO);
860 plugin->api->get_key (plugin->api->cls,
861 GNUNET_ntohll (msg->next_uid),
862 msg->random,
863 NULL,
864 ntohl (msg->type),
865 &transmit_item,
866 client);
867 GNUNET_SERVICE_client_continue (client);
868}
869
870
871/**
872 * Handle #GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY-message.
873 *
874 * @param cls closure
875 * @param msg the actual message
876 */
877static void
878handle_get_key (void *cls, const struct GetKeyMessage *msg)
879{
880 struct GNUNET_SERVICE_Client *client = cls;
881
882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
883 "Processing GET request for `%s' of type %u\n",
884 GNUNET_h2s (&msg->key),
885 (uint32_t) ntohl (msg->type));
886 GNUNET_STATISTICS_update (stats,
887 gettext_noop ("# GET KEY requests received"),
888 1,
889 GNUNET_NO);
890 if (GNUNET_YES != GNUNET_CONTAINER_bloomfilter_test (filter, &msg->key))
891 {
892 /* don't bother database... */
893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
894 "Empty result set for GET request for `%s' (bloomfilter).\n",
895 GNUNET_h2s (&msg->key));
896 GNUNET_STATISTICS_update (stats,
897 gettext_noop (
898 "# requests filtered by bloomfilter"),
899 1,
900 GNUNET_NO);
901 transmit_item (client,
902 NULL,
903 0,
904 NULL,
905 0,
906 0,
907 0,
908 0,
909 GNUNET_TIME_UNIT_ZERO_ABS,
910 0);
911 GNUNET_SERVICE_client_continue (client);
912 return;
913 }
914 plugin->api->get_key (plugin->api->cls,
915 GNUNET_ntohll (msg->next_uid),
916 msg->random,
917 &msg->key,
918 ntohl (msg->type),
919 &transmit_item,
920 client);
921 GNUNET_SERVICE_client_continue (client);
922}
923
924
925/**
926 * Handle GET_REPLICATION-message.
927 *
928 * @param cls identification of the client
929 * @param message the actual message
930 */
931static void
932handle_get_replication (void *cls, const struct GNUNET_MessageHeader *message)
933{
934 struct GNUNET_SERVICE_Client *client = cls;
935
936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing GET_REPLICATION request\n");
937 GNUNET_STATISTICS_update (stats,
938 gettext_noop (
939 "# GET REPLICATION requests received"),
940 1,
941 GNUNET_NO);
942 plugin->api->get_replication (plugin->api->cls, &transmit_item, client);
943 GNUNET_SERVICE_client_continue (client);
944}
945
946
947/**
948 * Handle GET_ZERO_ANONYMITY-message.
949 *
950 * @param cls client identification of the client
951 * @param message the actual message
952 */
953static void
954handle_get_zero_anonymity (void *cls, const struct GetZeroAnonymityMessage *msg)
955{
956 struct GNUNET_SERVICE_Client *client = cls;
957 enum GNUNET_BLOCK_Type type;
958
959 type = (enum GNUNET_BLOCK_Type) ntohl (msg->type);
960 if (type == GNUNET_BLOCK_TYPE_ANY)
961 {
962 GNUNET_break (0);
963 GNUNET_SERVICE_client_drop (client);
964 return;
965 }
966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
967 "Processing GET_ZERO_ANONYMITY request\n");
968 GNUNET_STATISTICS_update (stats,
969 gettext_noop (
970 "# GET ZERO ANONYMITY requests received"),
971 1,
972 GNUNET_NO);
973 plugin->api->get_zero_anonymity (plugin->api->cls,
974 GNUNET_ntohll (msg->next_uid),
975 type,
976 &transmit_item,
977 client);
978 GNUNET_SERVICE_client_continue (client);
979}
980
981
982/**
983 * Remove continuation.
984 *
985 * @param cls closure
986 * @param key key for the content
987 * @param size number of bytes in data
988 * @param status #GNUNET_OK if removed, #GNUNET_NO if not found,
989 * or #GNUNET_SYSERROR if error
990 * @param msg error message on error
991 */
992static void
993remove_continuation (void *cls,
994 const struct GNUNET_HashCode *key,
995 uint32_t size,
996 int status,
997 const char *msg)
998{
999 struct GNUNET_SERVICE_Client *client = cls;
1000
1001 if (GNUNET_SYSERR == status)
1002 {
1003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "REMOVE request failed: %s.\n", msg);
1004 transmit_status (client, GNUNET_NO, msg);
1005 return;
1006 }
1007 if (GNUNET_NO == status)
1008 {
1009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1010 "Content not found for REMOVE request.\n");
1011 transmit_status (client, GNUNET_NO, _ ("Content not found"));
1012 return;
1013 }
1014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1015 "Item matches REMOVE request for key `%s'.\n",
1016 GNUNET_h2s (key));
1017 GNUNET_STATISTICS_update (stats,
1018 gettext_noop ("# bytes removed (explicit request)"),
1019 size,
1020 GNUNET_YES);
1021 GNUNET_CONTAINER_bloomfilter_remove (filter, key);
1022 transmit_status (client, GNUNET_OK, NULL);
1023}
1024
1025
1026/**
1027 * Verify REMOVE-message.
1028 *
1029 * @param cls identification of the client
1030 * @param message the actual message
1031 * @return #GNUNET_OK if @a dm is well-formed
1032 */
1033static int
1034check_remove (void *cls, const struct DataMessage *dm)
1035{
1036 if (GNUNET_OK != check_data (dm))
1037 {
1038 GNUNET_break (0);
1039 return GNUNET_SYSERR;
1040 }
1041 return GNUNET_OK;
1042}
1043
1044
1045/**
1046 * Handle REMOVE-message.
1047 *
1048 * @param cls closure
1049 * @param client identification of the client
1050 * @param message the actual message
1051 */
1052static void
1053handle_remove (void *cls, const struct DataMessage *dm)
1054{
1055 struct GNUNET_SERVICE_Client *client = cls;
1056
1057 GNUNET_STATISTICS_update (stats,
1058 gettext_noop ("# REMOVE requests received"),
1059 1,
1060 GNUNET_NO);
1061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1062 "Processing REMOVE request for `%s'\n",
1063 GNUNET_h2s (&dm->key));
1064 plugin->api->remove_key (plugin->api->cls,
1065 &dm->key,
1066 ntohl (dm->size),
1067 &dm[1],
1068 &remove_continuation,
1069 client);
1070 GNUNET_SERVICE_client_continue (client);
1071}
1072
1073
1074/**
1075 * Handle DROP-message.
1076 *
1077 * @param cls identification of the client
1078 * @param message the actual message
1079 */
1080static void
1081handle_drop (void *cls, const struct GNUNET_MessageHeader *message)
1082{
1083 struct GNUNET_SERVICE_Client *client = cls;
1084
1085 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing DROP request\n");
1086 do_drop = GNUNET_YES;
1087 GNUNET_SERVICE_client_continue (client);
1088}
1089
1090
1091/**
1092 * Function called by plugins to notify us about a
1093 * change in their disk utilization.
1094 *
1095 * @param cls closure (NULL)
1096 * @param delta change in disk utilization,
1097 * 0 for "reset to empty"
1098 */
1099static void
1100disk_utilization_change_cb (void *cls, int delta)
1101{
1102 if ((delta < 0) && (payload < -delta))
1103 {
1104 GNUNET_log (
1105 GNUNET_ERROR_TYPE_WARNING,
1106 _ (
1107 "Datastore payload must have been inaccurate (%lld < %lld). Recomputing it.\n"),
1108 (long long) payload,
1109 (long long) -delta);
1110 plugin->api->estimate_size (plugin->api->cls, &payload);
1111 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1112 _ ("New payload: %lld\n"),
1113 (long long) payload);
1114 sync_stats ();
1115 return;
1116 }
1117 payload += delta;
1118 last_sync++;
1119 if (last_sync >= MAX_STAT_SYNC_LAG)
1120 sync_stats ();
1121}
1122
1123
1124/**
1125 * Callback function to process statistic values.
1126 *
1127 * @param cls closure (struct Plugin*)
1128 * @param subsystem name of subsystem that created the statistic
1129 * @param name the name of the datum
1130 * @param value the current value
1131 * @param is_persistent #GNUNET_YES if the value is persistent, #GNUNET_NO if not
1132 * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
1133 */
1134static int
1135process_stat_in (void *cls,
1136 const char *subsystem,
1137 const char *name,
1138 uint64_t value,
1139 int is_persistent)
1140{
1141 GNUNET_assert (GNUNET_NO == stats_worked);
1142 stats_worked = GNUNET_YES;
1143 payload += value;
1144 GNUNET_log (
1145 GNUNET_ERROR_TYPE_DEBUG,
1146 "Notification from statistics about existing payload (%llu), new payload is %llu\n",
1147 (unsigned long long) value,
1148 (unsigned long long) payload);
1149 return GNUNET_OK;
1150}
1151
1152
1153/**
1154 * Load the datastore plugin.
1155 */
1156static struct DatastorePlugin *
1157load_plugin ()
1158{
1159 struct DatastorePlugin *ret;
1160 char *libname;
1161
1162 ret = GNUNET_new (struct DatastorePlugin);
1163 ret->env.cfg = cfg;
1164 ret->env.duc = &disk_utilization_change_cb;
1165 ret->env.cls = NULL;
1166 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1167 _ ("Loading `%s' datastore plugin\n"),
1168 plugin_name);
1169 GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", plugin_name);
1170 ret->short_name = GNUNET_strdup (plugin_name);
1171 ret->lib_name = libname;
1172 ret->api = GNUNET_PLUGIN_load (libname, &ret->env);
1173 if (NULL == ret->api)
1174 {
1175 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1176 _ ("Failed to load datastore plugin for `%s'\n"),
1177 plugin_name);
1178 GNUNET_free (ret->short_name);
1179 GNUNET_free (libname);
1180 GNUNET_free (ret);
1181 return NULL;
1182 }
1183 return ret;
1184}
1185
1186
1187/**
1188 * Function called when the service shuts
1189 * down. Unloads our datastore plugin.
1190 *
1191 * @param plug plugin to unload
1192 */
1193static void
1194unload_plugin (struct DatastorePlugin *plug)
1195{
1196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1197 "Datastore service is unloading plugin...\n");
1198 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
1199 GNUNET_free (plug->lib_name);
1200 GNUNET_free (plug->short_name);
1201 GNUNET_free (plug);
1202}
1203
1204
1205/**
1206 * Initialization complete, start operating the service.
1207 */
1208static void
1209begin_service ()
1210{
1211 GNUNET_SERVICE_resume (service);
1212 expired_kill_task =
1213 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE,
1214 &delete_expired,
1215 NULL);
1216}
1217
1218
1219/**
1220 * Adds a given @a key to the bloomfilter in @a cls @a count times.
1221 *
1222 * @param cls the bloomfilter
1223 * @param key key to add
1224 * @param count number of times to add key
1225 */
1226static void
1227add_key_to_bloomfilter (void *cls,
1228 const struct GNUNET_HashCode *key,
1229 unsigned int count)
1230{
1231 struct GNUNET_CONTAINER_BloomFilter *bf = cls;
1232
1233 if (NULL == key)
1234 {
1235 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1236 _ ("Bloomfilter construction complete.\n"));
1237 begin_service ();
1238 return;
1239 }
1240
1241 while (0 < count--)
1242 GNUNET_CONTAINER_bloomfilter_add (bf, key);
1243}
1244
1245
1246/**
1247 * We finished receiving the statistic. Initialize the plugin; if
1248 * loading the statistic failed, run the estimator.
1249 *
1250 * @param cls NULL
1251 * @param success #GNUNET_NO if we failed to read the stat
1252 */
1253static void
1254process_stat_done (void *cls, int success)
1255{
1256 stat_get = NULL;
1257 if (NULL != stat_timeout_task)
1258 {
1259 GNUNET_SCHEDULER_cancel (stat_timeout_task);
1260 stat_timeout_task = NULL;
1261 }
1262 plugin = load_plugin ();
1263 if (NULL == plugin)
1264 {
1265 GNUNET_CONTAINER_bloomfilter_free (filter);
1266 filter = NULL;
1267 if (NULL != stats)
1268 {
1269 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1270 stats = NULL;
1271 }
1272 return;
1273 }
1274
1275 if (GNUNET_NO == stats_worked)
1276 {
1277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1278 "Failed to obtain value from statistics service, recomputing it\n");
1279 plugin->api->estimate_size (plugin->api->cls, &payload);
1280 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1281 _ ("New payload: %lld\n"),
1282 (long long) payload);
1283 }
1284
1285 if (GNUNET_YES == refresh_bf)
1286 {
1287 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1288 _ ("Rebuilding bloomfilter. Please be patient.\n"));
1289 if (NULL != plugin->api->get_keys)
1290 {
1291 plugin->api->get_keys (plugin->api->cls, &add_key_to_bloomfilter, filter);
1292 return;
1293 }
1294 else
1295 {
1296 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1297 _ (
1298 "Plugin does not support get_keys function. Please fix!\n"));
1299 }
1300 }
1301 begin_service ();
1302}
1303
1304
1305/**
1306 * Fetching stats took to long, run without.
1307 *
1308 * @param cls NULL
1309 */
1310static void
1311stat_timeout (void *cls)
1312{
1313 stat_timeout_task = NULL;
1314 GNUNET_STATISTICS_get_cancel (stat_get);
1315 process_stat_done (NULL, GNUNET_NO);
1316}
1317
1318
1319/**
1320 * Task run during shutdown.
1321 */
1322static void
1323cleaning_task (void *cls)
1324{
1325 cleaning_done = GNUNET_YES;
1326 if (NULL != expired_kill_task)
1327 {
1328 GNUNET_SCHEDULER_cancel (expired_kill_task);
1329 expired_kill_task = NULL;
1330 }
1331 if (GNUNET_YES == do_drop)
1332 {
1333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Dropping database!\n");
1334 plugin->api->drop (plugin->api->cls);
1335 payload = 0;
1336 last_sync++;
1337 }
1338 if (NULL != plugin)
1339 {
1340 unload_plugin (plugin);
1341 plugin = NULL;
1342 }
1343 if (NULL != filter)
1344 {
1345 GNUNET_CONTAINER_bloomfilter_free (filter);
1346 filter = NULL;
1347 }
1348 if (NULL != stat_get)
1349 {
1350 GNUNET_STATISTICS_get_cancel (stat_get);
1351 stat_get = NULL;
1352 }
1353 if (NULL != stat_timeout_task)
1354 {
1355 GNUNET_SCHEDULER_cancel (stat_timeout_task);
1356 stat_timeout_task = NULL;
1357 }
1358 GNUNET_free (plugin_name);
1359 plugin_name = NULL;
1360 if (last_sync > 0)
1361 sync_stats ();
1362 if (NULL != stats)
1363 {
1364 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1365 stats = NULL;
1366 }
1367 GNUNET_free (quota_stat_name);
1368 quota_stat_name = NULL;
1369}
1370
1371
1372/**
1373 * Add a client to our list of active clients.
1374 *
1375 * @param cls NULL
1376 * @param client client to add
1377 * @param mq message queue for @a client
1378 * @return @a client
1379 */
1380static void *
1381client_connect_cb (void *cls,
1382 struct GNUNET_SERVICE_Client *client,
1383 struct GNUNET_MQ_Handle *mq)
1384{
1385 return client;
1386}
1387
1388
1389/**
1390 * Called whenever a client is disconnected.
1391 * Frees our resources associated with that client.
1392 *
1393 * @param cls closure
1394 * @param client identification of the client
1395 * @param app_ctx must match @a client
1396 */
1397static void
1398client_disconnect_cb (void *cls,
1399 struct GNUNET_SERVICE_Client *client,
1400 void *app_ctx)
1401{
1402 struct ReservationList *pos;
1403 struct ReservationList *prev;
1404 struct ReservationList *next;
1405
1406 GNUNET_assert (app_ctx == client);
1407 prev = NULL;
1408 pos = reservations;
1409 while (NULL != pos)
1410 {
1411 next = pos->next;
1412 if (pos->client == client)
1413 {
1414 if (NULL == prev)
1415 reservations = next;
1416 else
1417 prev->next = next;
1418 reserved -= pos->amount + pos->entries * GNUNET_DATASTORE_ENTRY_OVERHEAD;
1419 GNUNET_free (pos);
1420 }
1421 else
1422 {
1423 prev = pos;
1424 }
1425 pos = next;
1426 }
1427 GNUNET_STATISTICS_set (stats,
1428 gettext_noop ("# reserved"),
1429 reserved,
1430 GNUNET_NO);
1431}
1432
1433
1434/**
1435 * Process datastore requests.
1436 *
1437 * @param cls closure
1438 * @param serv the initialized service
1439 * @param c configuration to use
1440 */
1441static void
1442run (void *cls,
1443 const struct GNUNET_CONFIGURATION_Handle *c,
1444 struct GNUNET_SERVICE_Handle *serv)
1445{
1446 char *fn;
1447 char *pfn;
1448 unsigned int bf_size;
1449
1450 service = serv;
1451 cfg = c;
1452 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
1453 "DATASTORE",
1454 "DATABASE",
1455 &plugin_name))
1456 {
1457 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1458 "DATABASE",
1459 "DATASTORE");
1460 return;
1461 }
1462 GNUNET_asprintf (&quota_stat_name,
1463 _ ("# bytes used in file-sharing datastore `%s'"),
1464 plugin_name);
1465 if (GNUNET_OK !=
1466 GNUNET_CONFIGURATION_get_value_size (cfg, "DATASTORE", "QUOTA", &quota))
1467 {
1468 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "QUOTA", "DATASTORE");
1469 return;
1470 }
1471 stats = GNUNET_STATISTICS_create ("datastore", cfg);
1472 GNUNET_STATISTICS_set (stats, gettext_noop ("# quota"), quota, GNUNET_NO);
1473 cache_size = quota / 8; /* Or should we make this an option? */
1474 GNUNET_STATISTICS_set (stats,
1475 gettext_noop ("# cache size"),
1476 cache_size,
1477 GNUNET_NO);
1478 if (quota / (32 * 1024LL) > MAX_BF_SIZE)
1479 bf_size = MAX_BF_SIZE;
1480 else
1481 bf_size =
1482 quota / (32 * 1024LL); /* 8 bit per entry, 1 bit per 32 kb in DB */
1483 fn = NULL;
1484 if ((GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg,
1485 "DATASTORE",
1486 "BLOOMFILTER",
1487 &fn)) ||
1488 (GNUNET_OK != GNUNET_DISK_directory_create_for_file (fn)))
1489 {
1490 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1491 _ ("Could not use specified filename `%s' for bloomfilter.\n"),
1492 NULL != fn ? fn : "");
1493 GNUNET_free (fn);
1494 fn = NULL;
1495 }
1496 if (NULL != fn)
1497 {
1498 GNUNET_asprintf (&pfn, "%s.%s", fn, plugin_name);
1499 if (GNUNET_YES == GNUNET_DISK_file_test (pfn))
1500 {
1501 filter =
1502 GNUNET_CONTAINER_bloomfilter_load (pfn,
1503 bf_size,
1504 5); /* approx. 3% false positives at max use */
1505 if (NULL == filter)
1506 {
1507 /* file exists but not valid, remove and try again, but refresh */
1508 if (0 != unlink (pfn))
1509 {
1510 /* failed to remove, run without file */
1511 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1512 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1513 pfn);
1514 GNUNET_free (pfn);
1515 pfn = NULL;
1516 filter = GNUNET_CONTAINER_bloomfilter_load (
1517 NULL,
1518 bf_size,
1519 5); /* approx. 3% false positives at max use */
1520 refresh_bf = GNUNET_YES;
1521 }
1522 else
1523 {
1524 /* try again after remove */
1525 filter = GNUNET_CONTAINER_bloomfilter_load (
1526 pfn,
1527 bf_size,
1528 5); /* approx. 3% false positives at max use */
1529 refresh_bf = GNUNET_YES;
1530 if (NULL == filter)
1531 {
1532 /* failed yet again, give up on using file */
1533 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1534 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1535 pfn);
1536 GNUNET_free (pfn);
1537 pfn = NULL;
1538 filter = GNUNET_CONTAINER_bloomfilter_init (
1539 NULL,
1540 bf_size,
1541 5); /* approx. 3% false positives at max use */
1542 }
1543 }
1544 }
1545 else
1546 {
1547 /* normal case: have an existing valid bf file, no need to refresh */
1548 refresh_bf = GNUNET_NO;
1549 }
1550 }
1551 else
1552 {
1553 filter =
1554 GNUNET_CONTAINER_bloomfilter_load (pfn,
1555 bf_size,
1556 5); /* approx. 3% false positives at max use */
1557 refresh_bf = GNUNET_YES;
1558 }
1559 GNUNET_free (pfn);
1560 }
1561 else
1562 {
1563 filter =
1564 GNUNET_CONTAINER_bloomfilter_init (NULL,
1565 bf_size,
1566 5); /* approx. 3% false positives at max use */
1567 refresh_bf = GNUNET_YES;
1568 }
1569 GNUNET_free (fn);
1570 if (NULL == filter)
1571 {
1572 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1573 _ ("Failed to initialize bloomfilter.\n"));
1574 if (NULL != stats)
1575 {
1576 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1577 stats = NULL;
1578 }
1579 return;
1580 }
1581 GNUNET_SERVICE_suspend (service);
1582 stat_get = GNUNET_STATISTICS_get (stats,
1583 "datastore",
1584 quota_stat_name,
1585 &process_stat_done,
1586 &process_stat_in,
1587 NULL);
1588 if (NULL == stat_get)
1589 process_stat_done (NULL, GNUNET_SYSERR);
1590 else
1591 stat_timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
1592 &stat_timeout,
1593 NULL);
1594 GNUNET_SCHEDULER_add_shutdown (&cleaning_task, NULL);
1595}
1596
1597
1598/**
1599 * Define "main" method using service macro.
1600 */
1601GNUNET_SERVICE_MAIN (
1602 "datastore",
1603 GNUNET_SERVICE_OPTION_NONE,
1604 &run,
1605 &client_connect_cb,
1606 &client_disconnect_cb,
1607 NULL,
1608 GNUNET_MQ_hd_fixed_size (reserve,
1609 GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE,
1610 struct ReserveMessage,
1611 NULL),
1612 GNUNET_MQ_hd_fixed_size (release_reserve,
1613 GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE,
1614 struct ReleaseReserveMessage,
1615 NULL),
1616 GNUNET_MQ_hd_var_size (put,
1617 GNUNET_MESSAGE_TYPE_DATASTORE_PUT,
1618 struct DataMessage,
1619 NULL),
1620 GNUNET_MQ_hd_fixed_size (get,
1621 GNUNET_MESSAGE_TYPE_DATASTORE_GET,
1622 struct GetMessage,
1623 NULL),
1624 GNUNET_MQ_hd_fixed_size (get_key,
1625 GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY,
1626 struct GetKeyMessage,
1627 NULL),
1628 GNUNET_MQ_hd_fixed_size (get_replication,
1629 GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION,
1630 struct GNUNET_MessageHeader,
1631 NULL),
1632 GNUNET_MQ_hd_fixed_size (get_zero_anonymity,
1633 GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY,
1634 struct GetZeroAnonymityMessage,
1635 NULL),
1636 GNUNET_MQ_hd_var_size (remove,
1637 GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE,
1638 struct DataMessage,
1639 NULL),
1640 GNUNET_MQ_hd_fixed_size (drop,
1641 GNUNET_MESSAGE_TYPE_DATASTORE_DROP,
1642 struct GNUNET_MessageHeader,
1643 NULL),
1644 GNUNET_MQ_handler_end ());
1645
1646
1647/* end of gnunet-service-datastore.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 14:56:36 +0000