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diff --git a/src/datastore/gnunet-service-datastore.c b/src/datastore/gnunet-service-datastore.c
deleted file mode 100644
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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 */
603 GNUNET_log (
604 GNUNET_ERROR_TYPE_WARNING,
605 _ (
606 "The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"),
607 req,
608 cache_size);
609 transmit_status (client,
610 0,
611 gettext_noop (
612 "Insufficient space to satisfy request and "
613 "requested amount is larger than cache size"));
614 }
615 else
616 {
617 transmit_status (client,
618 0,
619 gettext_noop ("Insufficient space to satisfy request"));
620 }
621 GNUNET_SERVICE_client_continue (client);
622 return;
623 }
624 reserved += req;
625 GNUNET_STATISTICS_set (stats,
626 gettext_noop ("# reserved"),
627 reserved,
628 GNUNET_NO);
629 e = GNUNET_new (struct ReservationList);
630 e->next = reservations;
631 reservations = e;
632 e->client = client;
633 e->amount = amount;
634 e->entries = entries;
635 e->rid = ++reservation_gen;
636 if (reservation_gen < 0)
637 reservation_gen = 0; /* wrap around */
638 transmit_status (client, e->rid, NULL);
639 GNUNET_SERVICE_client_continue (client);
640}
641
642
643/**
644 * Handle RELEASE_RESERVE-message.
645 *
646 * @param cls identification of the client
647 * @param message the actual message
648 */
649static void
650handle_release_reserve (void *cls, const struct ReleaseReserveMessage *msg)
651{
652 struct GNUNET_SERVICE_Client *client = cls;
653 struct ReservationList *pos;
654 struct ReservationList *prev;
655 struct ReservationList *next;
656 int rid = ntohl (msg->rid);
657 unsigned long long rem;
658
659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing RELEASE_RESERVE request\n");
660 next = reservations;
661 prev = NULL;
662 while (NULL != (pos = next))
663 {
664 next = pos->next;
665 if (rid == pos->rid)
666 {
667 if (prev == NULL)
668 reservations = next;
669 else
670 prev->next = next;
671 rem =
672 pos->amount
673 + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries;
674 GNUNET_assert (reserved >= rem);
675 reserved -= rem;
676 GNUNET_STATISTICS_set (stats,
677 gettext_noop ("# reserved"),
678 reserved,
679 GNUNET_NO);
680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
681 "Returning %llu remaining reserved bytes to storage pool\n",
682 rem);
683 GNUNET_free (pos);
684 transmit_status (client, GNUNET_OK, NULL);
685 GNUNET_SERVICE_client_continue (client);
686 return;
687 }
688 prev = pos;
689 }
690 GNUNET_break (0);
691 transmit_status (client,
692 GNUNET_SYSERR,
693 gettext_noop ("Could not find matching reservation"));
694 GNUNET_SERVICE_client_continue (client);
695}
696
697
698/**
699 * Check that the given message is a valid data message.
700 *
701 * @param dm message to check
702 * @return #GNUNET_SYSERR is not well-formed, otherwise #GNUNET_OK
703 */
704static int
705check_data (const struct DataMessage *dm)
706{
707 uint16_t size;
708 uint32_t dsize;
709
710 size = ntohs (dm->header.size);
711 dsize = ntohl (dm->size);
712 if (size != dsize + sizeof(struct DataMessage))
713 {
714 GNUNET_break (0);
715 return GNUNET_SYSERR;
716 }
717 return GNUNET_OK;
718}
719
720
721/**
722 * Put continuation.
723 *
724 * @param cls closure
725 * @param key key for the item stored
726 * @param size size of the item stored
727 * @param status #GNUNET_OK if inserted, #GNUNET_NO if updated,
728 * or #GNUNET_SYSERROR if error
729 * @param msg error message on error
730 */
731static void
732put_continuation (void *cls,
733 const struct GNUNET_HashCode *key,
734 uint32_t size,
735 int status,
736 const char *msg)
737{
738 struct GNUNET_SERVICE_Client *client = cls;
739
740 if (GNUNET_OK == status)
741 {
742 GNUNET_STATISTICS_update (stats,
743 gettext_noop ("# bytes stored"),
744 size,
745 GNUNET_YES);
746 GNUNET_CONTAINER_bloomfilter_add (filter, key);
747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
748 "Successfully stored %u bytes under key `%s'\n",
749 size,
750 GNUNET_h2s (key));
751 }
752 transmit_status (client,
753 GNUNET_SYSERR == status ? GNUNET_SYSERR : GNUNET_OK,
754 msg);
755 if (quota - reserved - cache_size < payload)
756 {
757 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
758 _ ("Need %llu bytes more space (%llu allowed, using %llu)\n"),
759 (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
760 (unsigned long long) (quota - reserved - cache_size),
761 (unsigned long long) payload);
762 manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
763 }
764}
765
766
767/**
768 * Verify PUT-message.
769 *
770 * @param cls identification of the client
771 * @param message the actual message
772 * @return #GNUNET_OK if @a dm is well-formed
773 */
774static int
775check_put (void *cls, const struct DataMessage *dm)
776{
777 if (GNUNET_OK != check_data (dm))
778 {
779 GNUNET_break (0);
780 return GNUNET_SYSERR;
781 }
782 return GNUNET_OK;
783}
784
785
786/**
787 * Handle PUT-message.
788 *
789 * @param cls identification of the client
790 * @param message the actual message
791 */
792static void
793handle_put (void *cls, const struct DataMessage *dm)
794{
795 struct GNUNET_SERVICE_Client *client = cls;
796 int rid;
797 struct ReservationList *pos;
798 uint32_t size;
799
800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
801 "Processing PUT request for `%s' of type %u\n",
802 GNUNET_h2s (&dm->key),
803 (uint32_t) ntohl (dm->type));
804 rid = ntohl (dm->rid);
805 size = ntohl (dm->size);
806 if (rid > 0)
807 {
808 pos = reservations;
809 while ((NULL != pos) && (rid != pos->rid))
810 pos = pos->next;
811 GNUNET_break (pos != NULL);
812 if (NULL != pos)
813 {
814 GNUNET_break (pos->entries > 0);
815 GNUNET_break (pos->amount >= size);
816 pos->entries--;
817 pos->amount -= size;
818 reserved -= (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
819 GNUNET_STATISTICS_set (stats,
820 gettext_noop ("# reserved"),
821 reserved,
822 GNUNET_NO);
823 }
824 }
825 bool absent =
826 GNUNET_NO == GNUNET_CONTAINER_bloomfilter_test (filter, &dm->key);
827 plugin->api->put (plugin->api->cls,
828 &dm->key,
829 absent,
830 ntohl (dm->size),
831 &dm[1],
832 ntohl (dm->type),
833 ntohl (dm->priority),
834 ntohl (dm->anonymity),
835 ntohl (dm->replication),
836 GNUNET_TIME_absolute_ntoh (dm->expiration),
837 &put_continuation,
838 client);
839 GNUNET_SERVICE_client_continue (client);
840}
841
842
843/**
844 * Handle #GNUNET_MESSAGE_TYPE_DATASTORE_GET-message.
845 *
846 * @param cls identification of the client
847 * @param msg the actual message
848 */
849static void
850handle_get (void *cls, const struct GetMessage *msg)
851{
852 struct GNUNET_SERVICE_Client *client = cls;
853
854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
855 "Processing GET request of type %u\n",
856 (uint32_t) ntohl (msg->type));
857 GNUNET_STATISTICS_update (stats,
858 gettext_noop ("# GET requests received"),
859 1,
860 GNUNET_NO);
861 plugin->api->get_key (plugin->api->cls,
862 GNUNET_ntohll (msg->next_uid),
863 msg->random,
864 NULL,
865 ntohl (msg->type),
866 &transmit_item,
867 client);
868 GNUNET_SERVICE_client_continue (client);
869}
870
871
872/**
873 * Handle #GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY-message.
874 *
875 * @param cls closure
876 * @param msg the actual message
877 */
878static void
879handle_get_key (void *cls, const struct GetKeyMessage *msg)
880{
881 struct GNUNET_SERVICE_Client *client = cls;
882
883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
884 "Processing GET request for `%s' of type %u\n",
885 GNUNET_h2s (&msg->key),
886 (uint32_t) ntohl (msg->type));
887 GNUNET_STATISTICS_update (stats,
888 gettext_noop ("# GET KEY requests received"),
889 1,
890 GNUNET_NO);
891 if (GNUNET_YES != GNUNET_CONTAINER_bloomfilter_test (filter, &msg->key))
892 {
893 /* don't bother database... */
894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
895 "Empty result set for GET request for `%s' (bloomfilter).\n",
896 GNUNET_h2s (&msg->key));
897 GNUNET_STATISTICS_update (stats,
898 gettext_noop (
899 "# requests filtered by bloomfilter"),
900 1,
901 GNUNET_NO);
902 transmit_item (client,
903 NULL,
904 0,
905 NULL,
906 0,
907 0,
908 0,
909 0,
910 GNUNET_TIME_UNIT_ZERO_ABS,
911 0);
912 GNUNET_SERVICE_client_continue (client);
913 return;
914 }
915 plugin->api->get_key (plugin->api->cls,
916 GNUNET_ntohll (msg->next_uid),
917 msg->random,
918 &msg->key,
919 ntohl (msg->type),
920 &transmit_item,
921 client);
922 GNUNET_SERVICE_client_continue (client);
923}
924
925
926/**
927 * Handle GET_REPLICATION-message.
928 *
929 * @param cls identification of the client
930 * @param message the actual message
931 */
932static void
933handle_get_replication (void *cls, const struct GNUNET_MessageHeader *message)
934{
935 struct GNUNET_SERVICE_Client *client = cls;
936
937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing GET_REPLICATION request\n");
938 GNUNET_STATISTICS_update (stats,
939 gettext_noop (
940 "# GET REPLICATION requests received"),
941 1,
942 GNUNET_NO);
943 plugin->api->get_replication (plugin->api->cls, &transmit_item, client);
944 GNUNET_SERVICE_client_continue (client);
945}
946
947
948/**
949 * Handle GET_ZERO_ANONYMITY-message.
950 *
951 * @param cls client identification of the client
952 * @param message the actual message
953 */
954static void
955handle_get_zero_anonymity (void *cls, const struct GetZeroAnonymityMessage *msg)
956{
957 struct GNUNET_SERVICE_Client *client = cls;
958 enum GNUNET_BLOCK_Type type;
959
960 type = (enum GNUNET_BLOCK_Type) ntohl (msg->type);
961 if (type == GNUNET_BLOCK_TYPE_ANY)
962 {
963 GNUNET_break (0);
964 GNUNET_SERVICE_client_drop (client);
965 return;
966 }
967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
968 "Processing GET_ZERO_ANONYMITY request\n");
969 GNUNET_STATISTICS_update (stats,
970 gettext_noop (
971 "# GET ZERO ANONYMITY requests received"),
972 1,
973 GNUNET_NO);
974 plugin->api->get_zero_anonymity (plugin->api->cls,
975 GNUNET_ntohll (msg->next_uid),
976 type,
977 &transmit_item,
978 client);
979 GNUNET_SERVICE_client_continue (client);
980}
981
982
983/**
984 * Remove continuation.
985 *
986 * @param cls closure
987 * @param key key for the content
988 * @param size number of bytes in data
989 * @param status #GNUNET_OK if removed, #GNUNET_NO if not found,
990 * or #GNUNET_SYSERROR if error
991 * @param msg error message on error
992 */
993static void
994remove_continuation (void *cls,
995 const struct GNUNET_HashCode *key,
996 uint32_t size,
997 int status,
998 const char *msg)
999{
1000 struct GNUNET_SERVICE_Client *client = cls;
1001
1002 if (GNUNET_SYSERR == status)
1003 {
1004 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "REMOVE request failed: %s.\n", msg);
1005 transmit_status (client, GNUNET_NO, msg);
1006 return;
1007 }
1008 if (GNUNET_NO == status)
1009 {
1010 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1011 "Content not found for REMOVE request.\n");
1012 transmit_status (client, GNUNET_NO, _ ("Content not found"));
1013 return;
1014 }
1015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1016 "Item matches REMOVE request for key `%s'.\n",
1017 GNUNET_h2s (key));
1018 GNUNET_STATISTICS_update (stats,
1019 gettext_noop ("# bytes removed (explicit request)"),
1020 size,
1021 GNUNET_YES);
1022 GNUNET_CONTAINER_bloomfilter_remove (filter, key);
1023 transmit_status (client, GNUNET_OK, NULL);
1024}
1025
1026
1027/**
1028 * Verify REMOVE-message.
1029 *
1030 * @param cls identification of the client
1031 * @param message the actual message
1032 * @return #GNUNET_OK if @a dm is well-formed
1033 */
1034static int
1035check_remove (void *cls, const struct DataMessage *dm)
1036{
1037 if (GNUNET_OK != check_data (dm))
1038 {
1039 GNUNET_break (0);
1040 return GNUNET_SYSERR;
1041 }
1042 return GNUNET_OK;
1043}
1044
1045
1046/**
1047 * Handle REMOVE-message.
1048 *
1049 * @param cls closure
1050 * @param client identification of the client
1051 * @param message the actual message
1052 */
1053static void
1054handle_remove (void *cls, const struct DataMessage *dm)
1055{
1056 struct GNUNET_SERVICE_Client *client = cls;
1057
1058 GNUNET_STATISTICS_update (stats,
1059 gettext_noop ("# REMOVE requests received"),
1060 1,
1061 GNUNET_NO);
1062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1063 "Processing REMOVE request for `%s'\n",
1064 GNUNET_h2s (&dm->key));
1065 plugin->api->remove_key (plugin->api->cls,
1066 &dm->key,
1067 ntohl (dm->size),
1068 &dm[1],
1069 &remove_continuation,
1070 client);
1071 GNUNET_SERVICE_client_continue (client);
1072}
1073
1074
1075/**
1076 * Handle DROP-message.
1077 *
1078 * @param cls identification of the client
1079 * @param message the actual message
1080 */
1081static void
1082handle_drop (void *cls, const struct GNUNET_MessageHeader *message)
1083{
1084 struct GNUNET_SERVICE_Client *client = cls;
1085
1086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing DROP request\n");
1087 do_drop = GNUNET_YES;
1088 GNUNET_SERVICE_client_continue (client);
1089}
1090
1091
1092/**
1093 * Function called by plugins to notify us about a
1094 * change in their disk utilization.
1095 *
1096 * @param cls closure (NULL)
1097 * @param delta change in disk utilization,
1098 * 0 for "reset to empty"
1099 */
1100static void
1101disk_utilization_change_cb (void *cls, int delta)
1102{
1103 if ((delta < 0) && (payload < -delta))
1104 {
1105 GNUNET_log (
1106 GNUNET_ERROR_TYPE_WARNING,
1107 _ (
1108 "Datastore payload must have been inaccurate (%lld < %lld). Recomputing it.\n"),
1109 (long long) payload,
1110 (long long) -delta);
1111 plugin->api->estimate_size (plugin->api->cls, &payload);
1112 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1113 _ ("New payload: %lld\n"),
1114 (long long) payload);
1115 sync_stats ();
1116 return;
1117 }
1118 payload += delta;
1119 last_sync++;
1120 if (last_sync >= MAX_STAT_SYNC_LAG)
1121 sync_stats ();
1122}
1123
1124
1125/**
1126 * Callback function to process statistic values.
1127 *
1128 * @param cls closure (struct Plugin*)
1129 * @param subsystem name of subsystem that created the statistic
1130 * @param name the name of the datum
1131 * @param value the current value
1132 * @param is_persistent #GNUNET_YES if the value is persistent, #GNUNET_NO if not
1133 * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
1134 */
1135static int
1136process_stat_in (void *cls,
1137 const char *subsystem,
1138 const char *name,
1139 uint64_t value,
1140 int is_persistent)
1141{
1142 GNUNET_assert (GNUNET_NO == stats_worked);
1143 stats_worked = GNUNET_YES;
1144 payload += value;
1145 GNUNET_log (
1146 GNUNET_ERROR_TYPE_DEBUG,
1147 "Notification from statistics about existing payload (%llu), new payload is %llu\n",
1148 (unsigned long long) value,
1149 (unsigned long long) payload);
1150 return GNUNET_OK;
1151}
1152
1153
1154/**
1155 * Load the datastore plugin.
1156 */
1157static struct DatastorePlugin *
1158load_plugin ()
1159{
1160 struct DatastorePlugin *ret;
1161 char *libname;
1162
1163 ret = GNUNET_new (struct DatastorePlugin);
1164 ret->env.cfg = cfg;
1165 ret->env.duc = &disk_utilization_change_cb;
1166 ret->env.cls = NULL;
1167 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1168 _ ("Loading `%s' datastore plugin\n"),
1169 plugin_name);
1170 GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", plugin_name);
1171 ret->short_name = GNUNET_strdup (plugin_name);
1172 ret->lib_name = libname;
1173 ret->api = GNUNET_PLUGIN_load (libname, &ret->env);
1174 if (NULL == ret->api)
1175 {
1176 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1177 _ ("Failed to load datastore plugin for `%s'\n"),
1178 plugin_name);
1179 GNUNET_free (ret->short_name);
1180 GNUNET_free (libname);
1181 GNUNET_free (ret);
1182 return NULL;
1183 }
1184 return ret;
1185}
1186
1187
1188/**
1189 * Function called when the service shuts
1190 * down. Unloads our datastore plugin.
1191 *
1192 * @param plug plugin to unload
1193 */
1194static void
1195unload_plugin (struct DatastorePlugin *plug)
1196{
1197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1198 "Datastore service is unloading plugin...\n");
1199 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
1200 GNUNET_free (plug->lib_name);
1201 GNUNET_free (plug->short_name);
1202 GNUNET_free (plug);
1203}
1204
1205
1206/**
1207 * Initialization complete, start operating the service.
1208 */
1209static void
1210begin_service ()
1211{
1212 GNUNET_SERVICE_resume (service);
1213 expired_kill_task =
1214 GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE,
1215 &delete_expired,
1216 NULL);
1217}
1218
1219
1220/**
1221 * Adds a given @a key to the bloomfilter in @a cls @a count times.
1222 *
1223 * @param cls the bloomfilter
1224 * @param key key to add
1225 * @param count number of times to add key
1226 */
1227static void
1228add_key_to_bloomfilter (void *cls,
1229 const struct GNUNET_HashCode *key,
1230 unsigned int count)
1231{
1232 struct GNUNET_CONTAINER_BloomFilter *bf = cls;
1233
1234 if (NULL == key)
1235 {
1236 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1237 _ ("Bloomfilter construction complete.\n"));
1238 begin_service ();
1239 return;
1240 }
1241
1242 while (0 < count--)
1243 GNUNET_CONTAINER_bloomfilter_add (bf, key);
1244}
1245
1246
1247/**
1248 * We finished receiving the statistic. Initialize the plugin; if
1249 * loading the statistic failed, run the estimator.
1250 *
1251 * @param cls NULL
1252 * @param success #GNUNET_NO if we failed to read the stat
1253 */
1254static void
1255process_stat_done (void *cls, int success)
1256{
1257 stat_get = NULL;
1258 if (NULL != stat_timeout_task)
1259 {
1260 GNUNET_SCHEDULER_cancel (stat_timeout_task);
1261 stat_timeout_task = NULL;
1262 }
1263 plugin = load_plugin ();
1264 if (NULL == plugin)
1265 {
1266 GNUNET_CONTAINER_bloomfilter_free (filter);
1267 filter = NULL;
1268 if (NULL != stats)
1269 {
1270 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1271 stats = NULL;
1272 }
1273 return;
1274 }
1275
1276 if (GNUNET_NO == stats_worked)
1277 {
1278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1279 "Failed to obtain value from statistics service, recomputing it\n");
1280 plugin->api->estimate_size (plugin->api->cls, &payload);
1281 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1282 _ ("New payload: %lld\n"),
1283 (long long) payload);
1284 }
1285
1286 if (GNUNET_YES == refresh_bf)
1287 {
1288 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1289 _ ("Rebuilding bloomfilter. Please be patient.\n"));
1290 if (NULL != plugin->api->get_keys)
1291 {
1292 plugin->api->get_keys (plugin->api->cls, &add_key_to_bloomfilter, filter);
1293 return;
1294 }
1295 else
1296 {
1297 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1298 _ (
1299 "Plugin does not support get_keys function. Please fix!\n"));
1300 }
1301 }
1302 begin_service ();
1303}
1304
1305
1306/**
1307 * Fetching stats took to long, run without.
1308 *
1309 * @param cls NULL
1310 */
1311static void
1312stat_timeout (void *cls)
1313{
1314 stat_timeout_task = NULL;
1315 GNUNET_STATISTICS_get_cancel (stat_get);
1316 process_stat_done (NULL, GNUNET_NO);
1317}
1318
1319
1320/**
1321 * Task run during shutdown.
1322 */
1323static void
1324cleaning_task (void *cls)
1325{
1326 cleaning_done = GNUNET_YES;
1327 if (NULL != expired_kill_task)
1328 {
1329 GNUNET_SCHEDULER_cancel (expired_kill_task);
1330 expired_kill_task = NULL;
1331 }
1332 if (GNUNET_YES == do_drop)
1333 {
1334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Dropping database!\n");
1335 plugin->api->drop (plugin->api->cls);
1336 payload = 0;
1337 last_sync++;
1338 }
1339 if (NULL != plugin)
1340 {
1341 unload_plugin (plugin);
1342 plugin = NULL;
1343 }
1344 if (NULL != filter)
1345 {
1346 GNUNET_CONTAINER_bloomfilter_free (filter);
1347 filter = NULL;
1348 }
1349 if (NULL != stat_get)
1350 {
1351 GNUNET_STATISTICS_get_cancel (stat_get);
1352 stat_get = NULL;
1353 }
1354 if (NULL != stat_timeout_task)
1355 {
1356 GNUNET_SCHEDULER_cancel (stat_timeout_task);
1357 stat_timeout_task = NULL;
1358 }
1359 GNUNET_free (plugin_name);
1360 plugin_name = NULL;
1361 if (last_sync > 0)
1362 sync_stats ();
1363 if (NULL != stats)
1364 {
1365 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1366 stats = NULL;
1367 }
1368 GNUNET_free (quota_stat_name);
1369 quota_stat_name = NULL;
1370}
1371
1372
1373/**
1374 * Add a client to our list of active clients.
1375 *
1376 * @param cls NULL
1377 * @param client client to add
1378 * @param mq message queue for @a client
1379 * @return @a client
1380 */
1381static void *
1382client_connect_cb (void *cls,
1383 struct GNUNET_SERVICE_Client *client,
1384 struct GNUNET_MQ_Handle *mq)
1385{
1386 return client;
1387}
1388
1389
1390/**
1391 * Called whenever a client is disconnected.
1392 * Frees our resources associated with that client.
1393 *
1394 * @param cls closure
1395 * @param client identification of the client
1396 * @param app_ctx must match @a client
1397 */
1398static void
1399client_disconnect_cb (void *cls,
1400 struct GNUNET_SERVICE_Client *client,
1401 void *app_ctx)
1402{
1403 struct ReservationList *pos;
1404 struct ReservationList *prev;
1405 struct ReservationList *next;
1406
1407 GNUNET_assert (app_ctx == client);
1408 prev = NULL;
1409 pos = reservations;
1410 while (NULL != pos)
1411 {
1412 next = pos->next;
1413 if (pos->client == client)
1414 {
1415 if (NULL == prev)
1416 reservations = next;
1417 else
1418 prev->next = next;
1419 reserved -= pos->amount + pos->entries * GNUNET_DATASTORE_ENTRY_OVERHEAD;
1420 GNUNET_free (pos);
1421 }
1422 else
1423 {
1424 prev = pos;
1425 }
1426 pos = next;
1427 }
1428 GNUNET_STATISTICS_set (stats,
1429 gettext_noop ("# reserved"),
1430 reserved,
1431 GNUNET_NO);
1432}
1433
1434
1435/**
1436 * Process datastore requests.
1437 *
1438 * @param cls closure
1439 * @param serv the initialized service
1440 * @param c configuration to use
1441 */
1442static void
1443run (void *cls,
1444 const struct GNUNET_CONFIGURATION_Handle *c,
1445 struct GNUNET_SERVICE_Handle *serv)
1446{
1447 char *fn;
1448 char *pfn;
1449 unsigned int bf_size;
1450
1451 service = serv;
1452 cfg = c;
1453 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
1454 "DATASTORE",
1455 "DATABASE",
1456 &plugin_name))
1457 {
1458 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
1459 "DATABASE",
1460 "DATASTORE");
1461 return;
1462 }
1463 GNUNET_asprintf (&quota_stat_name,
1464 _ ("# bytes used in file-sharing datastore `%s'"),
1465 plugin_name);
1466 if (GNUNET_OK !=
1467 GNUNET_CONFIGURATION_get_value_size (cfg, "DATASTORE", "QUOTA", &quota))
1468 {
1469 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "QUOTA", "DATASTORE");
1470 return;
1471 }
1472 stats = GNUNET_STATISTICS_create ("datastore", cfg);
1473 GNUNET_STATISTICS_set (stats, gettext_noop ("# quota"), quota, GNUNET_NO);
1474 cache_size = quota / 8; /* Or should we make this an option? */
1475 GNUNET_STATISTICS_set (stats,
1476 gettext_noop ("# cache size"),
1477 cache_size,
1478 GNUNET_NO);
1479 if (quota / (32 * 1024LL) > MAX_BF_SIZE)
1480 bf_size = MAX_BF_SIZE;
1481 else
1482 bf_size =
1483 quota / (32 * 1024LL); /* 8 bit per entry, 1 bit per 32 kb in DB */
1484 fn = NULL;
1485 if ((GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg,
1486 "DATASTORE",
1487 "BLOOMFILTER",
1488 &fn)) ||
1489 (GNUNET_OK != GNUNET_DISK_directory_create_for_file (fn)))
1490 {
1491 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1492 _ ("Could not use specified filename `%s' for bloomfilter.\n"),
1493 NULL != fn ? fn : "");
1494 GNUNET_free (fn);
1495 fn = NULL;
1496 }
1497 if (NULL != fn)
1498 {
1499 GNUNET_asprintf (&pfn, "%s.%s", fn, plugin_name);
1500 if (GNUNET_YES == GNUNET_DISK_file_test (pfn))
1501 {
1502 filter =
1503 GNUNET_CONTAINER_bloomfilter_load (pfn,
1504 bf_size,
1505 5); /* approx. 3% false positives at max use */
1506 if (NULL == filter)
1507 {
1508 /* file exists but not valid, remove and try again, but refresh */
1509 if (0 != unlink (pfn))
1510 {
1511 /* failed to remove, run without file */
1512 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1513 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1514 pfn);
1515 GNUNET_free (pfn);
1516 pfn = NULL;
1517 filter = GNUNET_CONTAINER_bloomfilter_load (
1518 NULL,
1519 bf_size,
1520 5); /* approx. 3% false positives at max use */
1521 refresh_bf = GNUNET_YES;
1522 }
1523 else
1524 {
1525 /* try again after remove */
1526 filter = GNUNET_CONTAINER_bloomfilter_load (
1527 pfn,
1528 bf_size,
1529 5); /* approx. 3% false positives at max use */
1530 refresh_bf = GNUNET_YES;
1531 if (NULL == filter)
1532 {
1533 /* failed yet again, give up on using file */
1534 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1535 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1536 pfn);
1537 GNUNET_free (pfn);
1538 pfn = NULL;
1539 filter = GNUNET_CONTAINER_bloomfilter_init (
1540 NULL,
1541 bf_size,
1542 5); /* approx. 3% false positives at max use */
1543 }
1544 }
1545 }
1546 else
1547 {
1548 /* normal case: have an existing valid bf file, no need to refresh */
1549 refresh_bf = GNUNET_NO;
1550 }
1551 }
1552 else
1553 {
1554 filter =
1555 GNUNET_CONTAINER_bloomfilter_load (pfn,
1556 bf_size,
1557 5); /* approx. 3% false positives at max use */
1558 refresh_bf = GNUNET_YES;
1559 }
1560 GNUNET_free (pfn);
1561 }
1562 else
1563 {
1564 filter =
1565 GNUNET_CONTAINER_bloomfilter_init (NULL,
1566 bf_size,
1567 5); /* approx. 3% false positives at max use */
1568 refresh_bf = GNUNET_YES;
1569 }
1570 GNUNET_free (fn);
1571 if (NULL == filter)
1572 {
1573 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1574 _ ("Failed to initialize bloomfilter.\n"));
1575 if (NULL != stats)
1576 {
1577 GNUNET_STATISTICS_destroy (stats, GNUNET_YES);
1578 stats = NULL;
1579 }
1580 return;
1581 }
1582 GNUNET_SERVICE_suspend (service);
1583 stat_get = GNUNET_STATISTICS_get (stats,
1584 "datastore",
1585 quota_stat_name,
1586 &process_stat_done,
1587 &process_stat_in,
1588 NULL);
1589 if (NULL == stat_get)
1590 process_stat_done (NULL, GNUNET_SYSERR);
1591 else
1592 stat_timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
1593 &stat_timeout,
1594 NULL);
1595 GNUNET_SCHEDULER_add_shutdown (&cleaning_task, NULL);
1596}
1597
1598
1599/**
1600 * Define "main" method using service macro.
1601 */
1602GNUNET_SERVICE_MAIN (
1603 "datastore",
1604 GNUNET_SERVICE_OPTION_NONE,
1605 &run,
1606 &client_connect_cb,
1607 &client_disconnect_cb,
1608 NULL,
1609 GNUNET_MQ_hd_fixed_size (reserve,
1610 GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE,
1611 struct ReserveMessage,
1612 NULL),
1613 GNUNET_MQ_hd_fixed_size (release_reserve,
1614 GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE,
1615 struct ReleaseReserveMessage,
1616 NULL),
1617 GNUNET_MQ_hd_var_size (put,
1618 GNUNET_MESSAGE_TYPE_DATASTORE_PUT,
1619 struct DataMessage,
1620 NULL),
1621 GNUNET_MQ_hd_fixed_size (get,
1622 GNUNET_MESSAGE_TYPE_DATASTORE_GET,
1623 struct GetMessage,
1624 NULL),
1625 GNUNET_MQ_hd_fixed_size (get_key,
1626 GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY,
1627 struct GetKeyMessage,
1628 NULL),
1629 GNUNET_MQ_hd_fixed_size (get_replication,
1630 GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION,
1631 struct GNUNET_MessageHeader,
1632 NULL),
1633 GNUNET_MQ_hd_fixed_size (get_zero_anonymity,
1634 GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY,
1635 struct GetZeroAnonymityMessage,
1636 NULL),
1637 GNUNET_MQ_hd_var_size (remove,
1638 GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE,
1639 struct DataMessage,
1640 NULL),
1641 GNUNET_MQ_hd_fixed_size (drop,
1642 GNUNET_MESSAGE_TYPE_DATASTORE_DROP,
1643 struct GNUNET_MessageHeader,
1644 NULL),
1645 GNUNET_MQ_handler_end ());
1646
1647
1648/* end of gnunet-service-datastore.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-26 12:32:51 +0000