2 This file is part of GNUnet.
3 (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file fs/gnunet-service-fs_pr.c
23 * @brief API to handle pending requests
24 * @author Christian Grothoff
27 #include "gnunet_load_lib.h"
28 #include "gnunet-service-fs.h"
29 #include "gnunet-service-fs_cp.h"
30 #include "gnunet-service-fs_indexing.h"
31 #include "gnunet-service-fs_pe.h"
32 #include "gnunet-service-fs_pr.h"
35 * Hard limit on the number of results we may get from the datastore per query.
37 #define MAX_RESULTS (100 * 1024)
42 struct GSF_PendingRequest
45 * Public data for the request.
47 struct GSF_PendingRequestData public_data;
50 * Function to call if we encounter a reply.
52 GSF_PendingRequestReplyHandler rh;
60 * Array of hash codes of replies we've already seen.
62 GNUNET_HashCode *replies_seen;
65 * Bloomfilter masking replies we've already seen.
67 struct GNUNET_CONTAINER_BloomFilter *bf;
70 * Entry for this pending request in the expiration heap, or NULL.
72 struct GNUNET_CONTAINER_HeapNode *hnode;
75 * Datastore queue entry for this request (or NULL for none).
77 struct GNUNET_DATASTORE_QueueEntry *qe;
80 * DHT request handle for this request (or NULL for none).
82 struct GNUNET_DHT_GetHandle *gh;
85 * Function to call upon completion of the local get
86 * request, or NULL for none.
88 GSF_LocalLookupContinuation llc_cont;
91 * Closure for llc_cont.
96 * Last result from the local datastore lookup evaluation.
98 enum GNUNET_BLOCK_EvaluationResult local_result;
101 * Identity of the peer that we should use for the 'sender'
102 * (recipient of the response) when forwarding (0 for none).
104 GNUNET_PEER_Id sender_pid;
107 * Time we started the last datastore lookup.
109 struct GNUNET_TIME_Absolute qe_start;
112 * Task that warns us if the local datastore lookup takes too long.
114 GNUNET_SCHEDULER_TaskIdentifier warn_task;
117 * Current offset for querying our local datastore for results.
118 * Starts at a random value, incremented until we get the same
119 * UID again (detected using 'first_uid'), which is then used
120 * to termiante the iteration.
122 uint64_t local_result_offset;
125 * Unique ID of the first result from the local datastore;
126 * used to detect wrap-around of the offset.
131 * Number of valid entries in the 'replies_seen' array.
133 unsigned int replies_seen_count;
136 * Length of the 'replies_seen' array.
138 unsigned int replies_seen_size;
141 * Mingle value we currently use for the bf.
146 * Do we have a first UID yet?
148 unsigned int have_first_uid;
154 * All pending requests, ordered by the query. Entries
155 * are of type 'struct GSF_PendingRequest*'.
157 static struct GNUNET_CONTAINER_MultiHashMap *pr_map;
161 * Datastore 'PUT' load tracking.
163 static struct GNUNET_LOAD_Value *datastore_put_load;
167 * Are we allowed to migrate content to this peer.
169 static int active_to_migration;
173 * Heap with the request that will expire next at the top. Contains
174 * pointers of type "struct PendingRequest*"; these will *also* be
175 * aliased from the "requests_by_peer" data structures and the
176 * "requests_by_query" table. Note that requests from our clients
177 * don't expire and are thus NOT in the "requests_by_expiration"
178 * (or the "requests_by_peer" tables).
180 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
184 * Maximum number of requests (from other peers, overall) that we're
185 * willing to have pending at any given point in time. Can be changed
186 * via the configuration file (32k is just the default).
188 static unsigned long long max_pending_requests = (32 * 1024);
192 * How many bytes should a bloomfilter be if we have already seen
193 * entry_count responses? Note that BLOOMFILTER_K gives us the number
194 * of bits set per entry. Furthermore, we should not re-size the
195 * filter too often (to keep it cheap).
197 * Since other peers will also add entries but not resize the filter,
198 * we should generally pick a slightly larger size than what the
199 * strict math would suggest.
201 * @return must be a power of two and smaller or equal to 2^15.
204 compute_bloomfilter_size (unsigned int entry_count)
207 unsigned int ideal = (entry_count * BLOOMFILTER_K) / 4;
208 uint16_t max = 1 << 15;
210 if (entry_count > max)
213 while ((size < max) && (size < ideal))
222 * Recalculate our bloom filter for filtering replies. This function
223 * will create a new bloom filter from scratch, so it should only be
224 * called if we have no bloomfilter at all (and hence can create a
225 * fresh one of minimal size without problems) OR if our peer is the
226 * initiator (in which case we may resize to larger than mimimum size).
228 * @param pr request for which the BF is to be recomputed
229 * @return GNUNET_YES if a refresh actually happened
232 refresh_bloomfilter (struct GSF_PendingRequest *pr)
236 GNUNET_HashCode mhash;
238 nsize = compute_bloomfilter_size (pr->replies_seen_count);
239 if ((pr->bf != NULL) &&
240 (nsize == GNUNET_CONTAINER_bloomfilter_get_size (pr->bf)))
241 return GNUNET_NO; /* size not changed */
243 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
244 pr->mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
246 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL, nsize, BLOOMFILTER_K);
247 for (i = 0; i < pr->replies_seen_count; i++)
249 GNUNET_BLOCK_mingle_hash (&pr->replies_seen[i], pr->mingle, &mhash);
250 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
257 * Create a new pending request.
259 * @param options request options
260 * @param type type of the block that is being requested
261 * @param query key for the lookup
262 * @param namespace namespace to lookup, NULL for no namespace
263 * @param target preferred target for the request, NULL for none
264 * @param bf_data raw data for bloom filter for known replies, can be NULL
265 * @param bf_size number of bytes in bf_data
266 * @param mingle mingle value for bf
267 * @param anonymity_level desired anonymity level
268 * @param priority maximum outgoing cummulative request priority to use
269 * @param ttl current time-to-live for the request
270 * @param sender_pid peer ID to use for the sender when forwarding, 0 for none
271 * @param replies_seen hash codes of known local replies
272 * @param replies_seen_count size of the 'replies_seen' array
273 * @param rh handle to call when we get a reply
274 * @param rh_cls closure for rh
275 * @return handle for the new pending request
277 struct GSF_PendingRequest *
278 GSF_pending_request_create_ (enum GSF_PendingRequestOptions options,
279 enum GNUNET_BLOCK_Type type,
280 const GNUNET_HashCode * query,
281 const GNUNET_HashCode * namespace,
282 const struct GNUNET_PeerIdentity *target,
286 uint32_t anonymity_level,
289 GNUNET_PEER_Id sender_pid,
290 const GNUNET_HashCode * replies_seen,
291 unsigned int replies_seen_count,
292 GSF_PendingRequestReplyHandler rh, void *rh_cls)
294 struct GSF_PendingRequest *pr;
295 struct GSF_PendingRequest *dpr;
298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
299 "Creating request handle for `%s' of type %d\n",
300 GNUNET_h2s (query), type);
302 GNUNET_STATISTICS_update (GSF_stats,
303 gettext_noop ("# Pending requests created"),
305 pr = GNUNET_malloc (sizeof (struct GSF_PendingRequest));
306 pr->local_result_offset =
307 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
308 pr->public_data.query = *query;
309 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == type)
311 GNUNET_assert (NULL != namespace);
312 pr->public_data.namespace = *namespace;
316 pr->public_data.target = *target;
317 pr->public_data.has_target = GNUNET_YES;
319 pr->public_data.anonymity_level = anonymity_level;
320 pr->public_data.priority = priority;
321 pr->public_data.original_priority = priority;
322 pr->public_data.options = options;
323 pr->public_data.type = type;
324 pr->public_data.start_time = GNUNET_TIME_absolute_get ();
325 pr->sender_pid = sender_pid;
328 GNUNET_assert ((sender_pid != 0) || (0 == (options & GSF_PRO_FORWARD_ONLY)));
330 pr->public_data.ttl =
331 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_multiply
332 (GNUNET_TIME_UNIT_SECONDS,
335 pr->public_data.ttl =
336 GNUNET_TIME_absolute_subtract (pr->public_data.start_time,
337 GNUNET_TIME_relative_multiply
338 (GNUNET_TIME_UNIT_SECONDS,
340 if (replies_seen_count > 0)
342 pr->replies_seen_size = replies_seen_count;
344 GNUNET_malloc (sizeof (GNUNET_HashCode) * pr->replies_seen_size);
345 memcpy (pr->replies_seen, replies_seen,
346 replies_seen_count * sizeof (GNUNET_HashCode));
347 pr->replies_seen_count = replies_seen_count;
351 pr->bf = GNUNET_CONTAINER_bloomfilter_init (bf_data,
352 bf_size, BLOOMFILTER_K);
355 else if ((replies_seen_count > 0) &&
356 (0 != (options & GSF_PRO_BLOOMFILTER_FULL_REFRESH)))
358 GNUNET_assert (GNUNET_YES == refresh_bloomfilter (pr));
360 GNUNET_CONTAINER_multihashmap_put (pr_map,
363 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
364 if (0 != (options & GSF_PRO_REQUEST_EXPIRES))
366 pr->hnode = GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap,
368 pr->public_data.ttl.abs_value);
369 /* make sure we don't track too many requests */
370 while (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) >
371 max_pending_requests)
373 dpr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
374 GNUNET_assert (dpr != NULL);
376 break; /* let the request live briefly... */
377 dpr->rh (dpr->rh_cls,
378 GNUNET_BLOCK_EVALUATION_REQUEST_VALID,
381 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_BLOCK_TYPE_ANY, NULL, 0);
382 GSF_pending_request_cancel_ (dpr, GNUNET_YES);
385 GNUNET_STATISTICS_update (GSF_stats,
386 gettext_noop ("# Pending requests active"),
393 * Obtain the public data associated with a pending request
395 * @param pr pending request
396 * @return associated public data
398 struct GSF_PendingRequestData *
399 GSF_pending_request_get_data_ (struct GSF_PendingRequest *pr)
401 return &pr->public_data;
406 * Test if two pending requests are compatible (would generate
407 * the same query modulo filters and should thus be processed
410 * @param pra a pending request
411 * @param pra another pending request
412 * @return GNUNET_OK if the requests are compatible
415 GSF_pending_request_is_compatible_ (struct GSF_PendingRequest *pra,
416 struct GSF_PendingRequest *prb)
418 if ((pra->public_data.type != prb->public_data.type) ||
419 (0 != memcmp (&pra->public_data.query,
420 &prb->public_data.query,
421 sizeof (GNUNET_HashCode))) ||
422 ((pra->public_data.type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
423 (0 != memcmp (&pra->public_data.namespace,
424 &prb->public_data.namespace, sizeof (GNUNET_HashCode)))))
432 * Update a given pending request with additional replies
433 * that have been seen.
435 * @param pr request to update
436 * @param replies_seen hash codes of replies that we've seen
437 * @param replies_seen_count size of the replies_seen array
440 GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
441 const GNUNET_HashCode * replies_seen,
442 unsigned int replies_seen_count)
445 GNUNET_HashCode mhash;
447 if (replies_seen_count + pr->replies_seen_count < pr->replies_seen_count)
448 return; /* integer overflow */
449 if (0 != (pr->public_data.options & GSF_PRO_BLOOMFILTER_FULL_REFRESH))
451 /* we're responsible for the BF, full refresh */
452 if (replies_seen_count + pr->replies_seen_count > pr->replies_seen_size)
453 GNUNET_array_grow (pr->replies_seen,
454 pr->replies_seen_size,
455 replies_seen_count + pr->replies_seen_count);
456 memcpy (&pr->replies_seen[pr->replies_seen_count],
457 replies_seen, sizeof (GNUNET_HashCode) * replies_seen_count);
458 pr->replies_seen_count += replies_seen_count;
459 if (GNUNET_NO == refresh_bloomfilter (pr))
461 /* bf not recalculated, simply extend it with new bits */
462 for (i = 0; i < replies_seen_count; i++)
464 GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
465 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
473 /* we're not the initiator, but the initiator did not give us
474 * any bloom-filter, so we need to create one on-the-fly */
475 pr->mingle = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
477 pr->bf = GNUNET_CONTAINER_bloomfilter_init (NULL,
478 compute_bloomfilter_size
479 (replies_seen_count),
482 for (i = 0; i < pr->replies_seen_count; i++)
484 GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
485 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
492 * Generate the message corresponding to the given pending request for
493 * transmission to other peers (or at least determine its size).
495 * @param pr request to generate the message for
496 * @param buf_size number of bytes available in buf
497 * @param buf where to copy the message (can be NULL)
498 * @return number of bytes needed (if > buf_size) or used
501 GSF_pending_request_get_message_ (struct GSF_PendingRequest *pr,
502 size_t buf_size, void *buf)
504 char lbuf[GNUNET_SERVER_MAX_MESSAGE_SIZE];
505 struct GetMessage *gm;
506 GNUNET_HashCode *ext;
512 struct GNUNET_TIME_Absolute now;
518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
519 "Building request message for `%s' of type %d\n",
520 GNUNET_h2s (&pr->public_data.query), pr->public_data.type);
524 do_route = (0 == (pr->public_data.options & GSF_PRO_FORWARD_ONLY));
525 if ((!do_route) && (pr->sender_pid == 0))
528 do_route = GNUNET_YES;
532 bm |= GET_MESSAGE_BIT_RETURN_TO;
535 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
537 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
540 if (GNUNET_YES == pr->public_data.has_target)
542 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
545 bf_size = GNUNET_CONTAINER_bloomfilter_get_size (pr->bf);
546 msize = sizeof (struct GetMessage) + bf_size + k * sizeof (GNUNET_HashCode);
547 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
548 if (buf_size < msize)
550 gm = (struct GetMessage *) lbuf;
551 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
552 gm->header.size = htons (msize);
553 gm->type = htonl (pr->public_data.type);
555 prio = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
556 pr->public_data.priority + 1);
559 pr->public_data.priority -= prio;
560 gm->priority = htonl (prio);
561 now = GNUNET_TIME_absolute_get ();
562 ttl = (int64_t) (pr->public_data.ttl.abs_value - now.abs_value);
563 gm->ttl = htonl (ttl / 1000);
564 gm->filter_mutator = htonl (pr->mingle);
565 gm->hash_bitmap = htonl (bm);
566 gm->query = pr->public_data.query;
567 ext = (GNUNET_HashCode *) & gm[1];
570 GNUNET_PEER_resolve (pr->sender_pid,
571 (struct GNUNET_PeerIdentity *) &ext[k++]);
572 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
573 memcpy (&ext[k++], &pr->public_data.namespace, sizeof (GNUNET_HashCode));
574 if (GNUNET_YES == pr->public_data.has_target)
575 ext[k++] = pr->public_data.target.hashPubKey;
577 GNUNET_assert (GNUNET_SYSERR !=
578 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
581 memcpy (buf, gm, msize);
587 * Iterator to free pending requests.
589 * @param cls closure, unused
590 * @param key current key code
591 * @param value value in the hash map (pending request)
592 * @return GNUNET_YES (we should continue to iterate)
595 clean_request (void *cls, const GNUNET_HashCode * key, void *value)
597 struct GSF_PendingRequest *pr = value;
598 GSF_LocalLookupContinuation cont;
601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
602 "Cleaning up pending request for `%s'.\n", GNUNET_h2s (key));
604 if (NULL != (cont = pr->llc_cont))
607 cont (pr->llc_cont_cls, pr, pr->local_result);
609 GSF_plan_notify_request_done_ (pr);
610 GNUNET_free_non_null (pr->replies_seen);
613 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
616 GNUNET_PEER_change_rc (pr->sender_pid, -1);
618 if (NULL != pr->hnode)
620 GNUNET_CONTAINER_heap_remove_node (pr->hnode);
625 GNUNET_DATASTORE_cancel (pr->qe);
630 GNUNET_DHT_get_stop (pr->gh);
633 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
635 GNUNET_SCHEDULER_cancel (pr->warn_task);
636 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
638 GNUNET_assert (GNUNET_OK ==
639 GNUNET_CONTAINER_multihashmap_remove (pr_map,
640 &pr->public_data.query,
642 GNUNET_STATISTICS_update (GSF_stats,
643 gettext_noop ("# Pending requests active"),
651 * Explicitly cancel a pending request.
653 * @param pr request to cancel
654 * @param full_cleanup fully purge the request
657 GSF_pending_request_cancel_ (struct GSF_PendingRequest *pr, int full_cleanup)
659 GSF_LocalLookupContinuation cont;
662 return; /* already cleaned up! */
663 if (GNUNET_YES != full_cleanup)
665 /* make request inactive (we're no longer interested in more results),
666 * but do NOT remove from our data-structures, we still need it there
667 * to prevent the request from looping */
669 if (NULL != (cont = pr->llc_cont))
672 cont (pr->llc_cont_cls, pr, pr->local_result);
674 GSF_plan_notify_request_done_ (pr);
677 GNUNET_DATASTORE_cancel (pr->qe);
682 GNUNET_DHT_get_stop (pr->gh);
685 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
687 GNUNET_SCHEDULER_cancel (pr->warn_task);
688 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
692 GNUNET_assert (GNUNET_YES ==
693 clean_request (NULL, &pr->public_data.query, pr));
698 * Iterate over all pending requests.
700 * @param it function to call for each request
701 * @param cls closure for it
704 GSF_iterate_pending_requests_ (GSF_PendingRequestIterator it, void *cls)
706 GNUNET_CONTAINER_multihashmap_iterate (pr_map,
707 (GNUNET_CONTAINER_HashMapIterator) it,
715 * Closure for "process_reply" function.
717 struct ProcessReplyClosure
720 * The data for the reply.
725 * Who gave us this reply? NULL for local host (or DHT)
727 struct GSF_ConnectedPeer *sender;
730 * When the reply expires.
732 struct GNUNET_TIME_Absolute expiration;
742 enum GNUNET_BLOCK_Type type;
745 * How much was this reply worth to us?
750 * Anonymity requirements for this reply.
752 uint32_t anonymity_level;
755 * Evaluation result (returned).
757 enum GNUNET_BLOCK_EvaluationResult eval;
760 * Did we find a matching request?
767 * Update the performance data for the sender (if any) since
768 * the sender successfully answered one of our queries.
770 * @param prq information about the sender
771 * @param pr request that was satisfied
774 update_request_performance_data (struct ProcessReplyClosure *prq,
775 struct GSF_PendingRequest *pr)
777 if (prq->sender == NULL)
779 GSF_peer_update_performance_ (prq->sender,
780 pr->public_data.start_time, prq->priority);
785 * We have received a reply; handle it!
787 * @param cls response (struct ProcessReplyClosure)
788 * @param key our query
789 * @param value value in the hash map (info about the query)
790 * @return GNUNET_YES (we should continue to iterate)
793 process_reply (void *cls, const GNUNET_HashCode * key, void *value)
795 struct ProcessReplyClosure *prq = cls;
796 struct GSF_PendingRequest *pr = value;
797 GNUNET_HashCode chash;
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "Matched result (type %u) for query `%s' with pending request\n",
804 (unsigned int) prq->type, GNUNET_h2s (key));
806 GNUNET_STATISTICS_update (GSF_stats,
807 gettext_noop ("# replies received and matched"),
809 prq->eval = GNUNET_BLOCK_evaluate (GSF_block_ctx,
814 &pr->public_data.namespace,
816 GNUNET_BLOCK_TYPE_FS_SBLOCK) ?
817 sizeof (GNUNET_HashCode) : 0, prq->data,
821 case GNUNET_BLOCK_EVALUATION_OK_MORE:
822 update_request_performance_data (prq, pr);
824 case GNUNET_BLOCK_EVALUATION_OK_LAST:
825 /* short cut: stop processing early, no BF-update, etc. */
826 update_request_performance_data (prq, pr);
827 GNUNET_LOAD_update (GSF_rt_entry_lifetime,
828 GNUNET_TIME_absolute_get_duration (pr->
829 public_data.start_time).rel_value);
830 /* pass on to other peers / local clients */
834 prq->anonymity_level,
835 prq->expiration, prq->type, prq->data, prq->size);
837 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
838 GNUNET_STATISTICS_update (GSF_stats,
840 ("# duplicate replies discarded (bloomfilter)"),
843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
844 "Duplicate response `%s', discarding.\n", GNUNET_h2s (&mhash));
846 return GNUNET_YES; /* duplicate */
847 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
848 return GNUNET_YES; /* wrong namespace */
849 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
852 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
855 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
856 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
857 _("Unsupported block type %u\n"), prq->type);
860 /* update bloomfilter */
861 GNUNET_CRYPTO_hash (prq->data, prq->size, &chash);
862 GSF_pending_request_update_ (pr, &chash, 1);
863 if (NULL == prq->sender)
866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
867 "Found result for query `%s' in local datastore\n",
870 GNUNET_STATISTICS_update (GSF_stats,
871 gettext_noop ("# results found locally"),
876 GSF_dht_lookup_ (pr);
878 prq->priority += pr->public_data.original_priority;
879 pr->public_data.priority = 0;
880 pr->public_data.original_priority = 0;
881 pr->public_data.results_found++;
882 prq->request_found = GNUNET_YES;
883 /* finally, pass on to other peer / local client */
887 prq->anonymity_level,
888 prq->expiration, prq->type, prq->data, prq->size);
894 * Context for the 'put_migration_continuation'.
896 struct PutMigrationContext
900 * Start time for the operation.
902 struct GNUNET_TIME_Absolute start;
907 struct GNUNET_PeerIdentity origin;
910 * GNUNET_YES if we had a matching request for this block,
918 * Continuation called to notify client about result of the
922 * @param success GNUNET_SYSERR on failure
923 * @param msg NULL on success, otherwise an error message
926 put_migration_continuation (void *cls, int success, const char *msg)
928 struct PutMigrationContext *pmc = cls;
929 struct GNUNET_TIME_Relative delay;
930 struct GNUNET_TIME_Relative block_time;
931 struct GSF_ConnectedPeer *cp;
932 struct GSF_PeerPerformanceData *ppd;
934 delay = GNUNET_TIME_absolute_get_duration (pmc->start);
935 cp = GSF_peer_get_ (&pmc->origin);
936 if ((GNUNET_OK != success) && (GNUNET_NO == pmc->requested))
938 /* block migration for a bit... */
941 ppd = GSF_get_peer_performance_data_ (cp);
942 ppd->migration_duplication++;
943 block_time = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
945 ppd->migration_duplication +
946 GNUNET_CRYPTO_random_u32
947 (GNUNET_CRYPTO_QUALITY_WEAK,
949 GSF_block_peer_migration_ (cp, block_time);
956 ppd = GSF_get_peer_performance_data_ (cp);
957 ppd->migration_duplication = 0; /* reset counter */
961 /* FIXME: should we really update the load value on failure? */
962 if (NULL != datastore_put_load)
963 GNUNET_LOAD_update (datastore_put_load, delay.rel_value);
964 if (GNUNET_OK == success)
966 GNUNET_STATISTICS_update (GSF_stats,
967 gettext_noop ("# Datastore `PUT' failures"),
973 * Test if the DATABASE (PUT) load on this peer is too high
974 * to even consider processing the query at
977 * @return GNUNET_YES if the load is too high to do anything (load high)
978 * GNUNET_NO to process normally (load normal or low)
981 test_put_load_too_high (uint32_t priority)
985 if (NULL == datastore_put_load)
987 if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
988 return GNUNET_NO; /* very fast */
989 ld = GNUNET_LOAD_get_load (datastore_put_load);
990 if (ld < 2.0 * (1 + priority))
992 GNUNET_STATISTICS_update (GSF_stats,
994 ("# storage requests dropped due to high load"), 1,
1001 * Iterator called on each result obtained for a DHT
1002 * operation that expects a reply
1004 * @param cls closure
1005 * @param exp when will this value expire
1006 * @param key key of the result
1007 * @param get_path NULL-terminated array of pointers
1008 * to the peers on reverse GET path (or NULL if not recorded)
1009 * @param put_path NULL-terminated array of pointers
1010 * to the peers on the PUT path (or NULL if not recorded)
1011 * @param type type of the result
1012 * @param size number of bytes in data
1013 * @param data pointer to the result data
1016 handle_dht_reply (void *cls,
1017 struct GNUNET_TIME_Absolute exp,
1018 const GNUNET_HashCode * key,
1019 const struct GNUNET_PeerIdentity *const *get_path,
1020 const struct GNUNET_PeerIdentity *const *put_path,
1021 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1023 struct GSF_PendingRequest *pr = cls;
1024 struct ProcessReplyClosure prq;
1025 struct PutMigrationContext *pmc;
1027 GNUNET_STATISTICS_update (GSF_stats,
1028 gettext_noop ("# Replies received from DHT"),
1030 memset (&prq, 0, sizeof (prq));
1032 prq.expiration = exp;
1035 process_reply (&prq, key, pr);
1036 if ((GNUNET_YES == active_to_migration) &&
1037 (GNUNET_NO == test_put_load_too_high (prq.priority)))
1040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1041 "Replicating result for query `%s' with priority %u\n",
1042 GNUNET_h2s (key), prq.priority);
1044 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
1045 pmc->start = GNUNET_TIME_absolute_get ();
1046 pmc->requested = GNUNET_YES;
1048 GNUNET_DATASTORE_put (GSF_dsh,
1050 type, prq.priority, 1 /* anonymity */ ,
1051 0 /* replication */ ,
1053 1 + prq.priority, MAX_DATASTORE_QUEUE,
1054 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1055 &put_migration_continuation, pmc))
1057 put_migration_continuation (pmc, GNUNET_NO, NULL);
1064 * Consider looking up the data in the DHT (anonymity-level permitting).
1066 * @param pr the pending request to process
1069 GSF_dht_lookup_ (struct GSF_PendingRequest *pr)
1073 struct GNUNET_PeerIdentity pi;
1074 char buf[sizeof (GNUNET_HashCode) * 2];
1076 if (0 != pr->public_data.anonymity_level)
1080 GNUNET_DHT_get_stop (pr->gh);
1085 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
1088 memcpy (buf, &pr->public_data.namespace, sizeof (GNUNET_HashCode));
1089 xquery_size = sizeof (GNUNET_HashCode);
1091 if (0 != (pr->public_data.options & GSF_PRO_FORWARD_ONLY))
1093 GNUNET_assert (0 != pr->sender_pid);
1094 GNUNET_PEER_resolve (pr->sender_pid, &pi);
1095 memcpy (&buf[xquery_size], &pi, sizeof (struct GNUNET_PeerIdentity));
1096 xquery_size += sizeof (struct GNUNET_PeerIdentity);
1098 pr->gh = GNUNET_DHT_get_start (GSF_dht,
1099 GNUNET_TIME_UNIT_FOREVER_REL,
1100 pr->public_data.type,
1101 &pr->public_data.query,
1102 DEFAULT_GET_REPLICATION,
1103 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1106 xquery, xquery_size, &handle_dht_reply, pr);
1111 * Task that issues a warning if the datastore lookup takes too long.
1113 * @param cls the 'struct GSF_PendingRequest'
1114 * @param tc task context
1117 warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1119 struct GSF_PendingRequest *pr = cls;
1121 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1122 _("Datastore lookup already took %llu ms!\n"),
1123 (unsigned long long)
1124 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1126 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1132 * Task that issues a warning if the datastore lookup takes too long.
1134 * @param cls the 'struct GSF_PendingRequest'
1135 * @param tc task context
1138 odc_warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1140 struct GSF_PendingRequest *pr = cls;
1142 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1143 _("On-demand lookup already took %llu ms!\n"),
1144 (unsigned long long)
1145 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1147 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1148 &odc_warn_delay_task, pr);
1153 * We're processing (local) results for a search request
1154 * from another peer. Pass applicable results to the
1155 * peer and if we are done either clean up (operation
1156 * complete) or forward to other peers (more results possible).
1158 * @param cls our closure (struct PendingRequest)
1159 * @param key key for the content
1160 * @param size number of bytes in data
1161 * @param data content stored
1162 * @param type type of the content
1163 * @param priority priority of the content
1164 * @param anonymity anonymity-level for the content
1165 * @param expiration expiration time for the content
1166 * @param uid unique identifier for the datum;
1167 * maybe 0 if no unique identifier is available
1170 process_local_reply (void *cls,
1171 const GNUNET_HashCode * key,
1174 enum GNUNET_BLOCK_Type type,
1177 struct GNUNET_TIME_Absolute expiration, uint64_t uid)
1179 struct GSF_PendingRequest *pr = cls;
1180 GSF_LocalLookupContinuation cont;
1181 struct ProcessReplyClosure prq;
1182 GNUNET_HashCode query;
1183 unsigned int old_rf;
1185 GNUNET_SCHEDULER_cancel (pr->warn_task);
1186 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1192 GNUNET_STATISTICS_update (GSF_stats,
1194 ("# Datastore lookups concluded (no results)"),
1197 if (GNUNET_NO == pr->have_first_uid)
1199 pr->first_uid = uid;
1200 pr->have_first_uid = 1;
1204 if ((uid == pr->first_uid) && (key != NULL))
1206 GNUNET_STATISTICS_update (GSF_stats,
1208 ("# Datastore lookups concluded (seen all)"),
1210 key = NULL; /* all replies seen! */
1212 pr->have_first_uid++;
1213 if ((pr->have_first_uid > MAX_RESULTS) && (key != NULL))
1215 GNUNET_STATISTICS_update (GSF_stats,
1217 ("# Datastore lookups aborted (more than MAX_RESULTS)"),
1219 key = NULL; /* all replies seen! */
1226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1227 "No further local responses available.\n");
1229 if ((pr->public_data.type == GNUNET_BLOCK_TYPE_FS_DBLOCK) ||
1230 (pr->public_data.type == GNUNET_BLOCK_TYPE_FS_IBLOCK))
1231 GNUNET_STATISTICS_update (GSF_stats,
1233 ("# requested DBLOCK or IBLOCK not found"), 1,
1235 goto check_error_and_continue;
1238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1239 "Received reply for `%s' of type %d with UID %llu from datastore.\n",
1240 GNUNET_h2s (key), type, (unsigned long long) uid);
1242 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1246 "Found ONDEMAND block, performing on-demand encoding\n");
1248 GNUNET_STATISTICS_update (GSF_stats,
1250 ("# on-demand blocks matched requests"), 1,
1252 pr->qe_start = GNUNET_TIME_absolute_get ();
1253 pr->warn_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1254 &odc_warn_delay_task, pr);
1256 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
1257 anonymity, expiration, uid,
1258 &process_local_reply, pr))
1260 GNUNET_STATISTICS_update (GSF_stats,
1262 ("# on-demand lookups performed successfully"),
1264 return; /* we're done */
1266 GNUNET_STATISTICS_update (GSF_stats,
1267 gettext_noop ("# on-demand lookups failed"),
1269 GNUNET_SCHEDULER_cancel (pr->warn_task);
1270 pr->warn_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1271 &warn_delay_task, pr);
1272 pr->qe = GNUNET_DATASTORE_get_key (GSF_dsh,
1273 pr->local_result_offset - 1,
1274 &pr->public_data.query,
1275 pr->public_data.type ==
1276 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1277 GNUNET_BLOCK_TYPE_ANY : pr->
1280 (GSF_PRO_PRIORITY_UNLIMITED &
1282 options)) ? UINT_MAX : 1
1283 /* queue priority */ ,
1285 (GSF_PRO_PRIORITY_UNLIMITED &
1286 pr->public_data.options)) ? UINT_MAX :
1288 /* max queue size */ ,
1289 GNUNET_TIME_UNIT_FOREVER_REL,
1290 &process_local_reply, pr);
1293 GNUNET_STATISTICS_update (GSF_stats,
1295 ("# Datastore lookups concluded (error queueing)"),
1297 return; /* we're done */
1299 goto check_error_and_continue;
1301 old_rf = pr->public_data.results_found;
1302 memset (&prq, 0, sizeof (prq));
1304 prq.expiration = expiration;
1307 GNUNET_BLOCK_get_key (GSF_block_ctx, type, data, size, &query))
1310 GNUNET_DATASTORE_remove (GSF_dsh,
1313 -1, -1, GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
1314 pr->qe_start = GNUNET_TIME_absolute_get ();
1315 pr->warn_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1316 &warn_delay_task, pr);
1317 pr->qe = GNUNET_DATASTORE_get_key (GSF_dsh,
1318 pr->local_result_offset - 1,
1319 &pr->public_data.query,
1320 pr->public_data.type ==
1321 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1322 GNUNET_BLOCK_TYPE_ANY : pr->
1325 (GSF_PRO_PRIORITY_UNLIMITED &
1327 options)) ? UINT_MAX : 1
1328 /* queue priority */ ,
1330 (GSF_PRO_PRIORITY_UNLIMITED &
1331 pr->public_data.options)) ? UINT_MAX :
1333 /* max queue size */ ,
1334 GNUNET_TIME_UNIT_FOREVER_REL,
1335 &process_local_reply, pr);
1338 GNUNET_STATISTICS_update (GSF_stats,
1340 ("# Datastore lookups concluded (error queueing)"),
1342 goto check_error_and_continue;
1347 prq.priority = priority;
1348 prq.request_found = GNUNET_NO;
1349 prq.anonymity_level = anonymity;
1350 if ((old_rf == 0) && (pr->public_data.results_found == 0))
1351 GSF_update_datastore_delay_ (pr->public_data.start_time);
1352 process_reply (&prq, key, pr);
1353 pr->local_result = prq.eval;
1354 if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
1356 GNUNET_STATISTICS_update (GSF_stats,
1358 ("# Datastore lookups concluded (found ultimate result)"),
1360 goto check_error_and_continue;
1362 if ((0 == (GSF_PRO_PRIORITY_UNLIMITED & pr->public_data.options)) &&
1363 ((GNUNET_YES == GSF_test_get_load_too_high_ (0)) ||
1364 (pr->public_data.results_found > 5 + 2 * pr->public_data.priority)))
1367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load too high, done with request\n");
1369 GNUNET_STATISTICS_update (GSF_stats,
1371 ("# Datastore lookups concluded (load too high)"),
1373 goto check_error_and_continue;
1375 pr->qe_start = GNUNET_TIME_absolute_get ();
1376 pr->warn_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1377 &warn_delay_task, pr);
1378 pr->qe = GNUNET_DATASTORE_get_key (GSF_dsh,
1379 pr->local_result_offset++,
1380 &pr->public_data.query,
1381 pr->public_data.type ==
1382 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1383 GNUNET_BLOCK_TYPE_ANY : pr->
1386 (GSF_PRO_PRIORITY_UNLIMITED &
1387 pr->public_data.options)) ? UINT_MAX : 1
1388 /* queue priority */ ,
1390 (GSF_PRO_PRIORITY_UNLIMITED &
1391 pr->public_data.options)) ? UINT_MAX : 1
1392 /* max queue size */ ,
1393 GNUNET_TIME_UNIT_FOREVER_REL,
1394 &process_local_reply, pr);
1395 /* check if we successfully queued another datastore request;
1396 * if so, return, otherwise call our continuation (if we have
1398 check_error_and_continue:
1401 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
1403 GNUNET_SCHEDULER_cancel (pr->warn_task);
1404 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1406 if (NULL == (cont = pr->llc_cont))
1407 return; /* no continuation */
1408 pr->llc_cont = NULL;
1409 cont (pr->llc_cont_cls, pr, pr->local_result);
1414 * Look up the request in the local datastore.
1416 * @param pr the pending request to process
1417 * @param cont function to call at the end
1418 * @param cont_cls closure for cont
1421 GSF_local_lookup_ (struct GSF_PendingRequest *pr,
1422 GSF_LocalLookupContinuation cont, void *cont_cls)
1424 GNUNET_assert (NULL == pr->gh);
1425 GNUNET_assert (NULL == pr->llc_cont);
1426 pr->llc_cont = cont;
1427 pr->llc_cont_cls = cont_cls;
1428 pr->qe_start = GNUNET_TIME_absolute_get ();
1429 pr->warn_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1430 &warn_delay_task, pr);
1431 GNUNET_STATISTICS_update (GSF_stats,
1432 gettext_noop ("# Datastore lookups initiated"),
1434 pr->qe = GNUNET_DATASTORE_get_key (GSF_dsh,
1435 pr->local_result_offset++,
1436 &pr->public_data.query,
1437 pr->public_data.type ==
1438 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1439 GNUNET_BLOCK_TYPE_ANY : pr->
1442 (GSF_PRO_PRIORITY_UNLIMITED &
1443 pr->public_data.options)) ? UINT_MAX : 1
1444 /* queue priority */ ,
1446 (GSF_PRO_PRIORITY_UNLIMITED &
1447 pr->public_data.options)) ? UINT_MAX : 1
1448 /* max queue size */ ,
1449 GNUNET_TIME_UNIT_FOREVER_REL,
1450 &process_local_reply, pr);
1453 GNUNET_STATISTICS_update (GSF_stats,
1455 ("# Datastore lookups concluded (error queueing)"),
1460 GNUNET_SCHEDULER_cancel (pr->warn_task);
1461 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1462 pr->llc_cont = NULL;
1464 cont (cont_cls, pr, pr->local_result);
1470 * Handle P2P "CONTENT" message. Checks that the message is
1471 * well-formed and then checks if there are any pending requests for
1472 * this content and possibly passes it on (to local clients or other
1473 * peers). Does NOT perform migration (content caching at this peer).
1475 * @param cp the other peer involved (sender or receiver, NULL
1476 * for loopback messages where we are both sender and receiver)
1477 * @param message the actual message
1478 * @return GNUNET_OK if the message was well-formed,
1479 * GNUNET_SYSERR if the message was malformed (close connection,
1480 * do not cache under any circumstances)
1483 GSF_handle_p2p_content_ (struct GSF_ConnectedPeer *cp,
1484 const struct GNUNET_MessageHeader *message)
1486 const struct PutMessage *put;
1489 enum GNUNET_BLOCK_Type type;
1490 struct GNUNET_TIME_Absolute expiration;
1491 GNUNET_HashCode query;
1492 struct ProcessReplyClosure prq;
1493 struct GNUNET_TIME_Relative block_time;
1495 struct PutMigrationContext *pmc;
1497 msize = ntohs (message->size);
1498 if (msize < sizeof (struct PutMessage))
1500 GNUNET_break_op (0);
1501 return GNUNET_SYSERR;
1503 put = (const struct PutMessage *) message;
1504 dsize = msize - sizeof (struct PutMessage);
1505 type = ntohl (put->type);
1506 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
1507 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1508 return GNUNET_SYSERR;
1510 GNUNET_BLOCK_get_key (GSF_block_ctx, type, &put[1], dsize, &query))
1512 GNUNET_break_op (0);
1513 return GNUNET_SYSERR;
1515 GNUNET_STATISTICS_update (GSF_stats,
1516 gettext_noop ("# GAP PUT messages received"),
1518 /* now, lookup 'query' */
1519 prq.data = (const void *) &put[1];
1526 prq.expiration = expiration;
1528 prq.anonymity_level = UINT32_MAX;
1529 prq.request_found = GNUNET_NO;
1530 GNUNET_CONTAINER_multihashmap_get_multiple (pr_map,
1531 &query, &process_reply, &prq);
1534 GSF_connected_peer_change_preference_ (cp,
1535 CONTENT_BANDWIDTH_VALUE +
1536 1000 * prq.priority);
1537 GSF_get_peer_performance_data_ (cp)->trust += prq.priority;
1539 if ((GNUNET_YES == active_to_migration) &&
1540 (GNUNET_NO == test_put_load_too_high (prq.priority)))
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1544 "Replicating result for query `%s' with priority %u\n",
1545 GNUNET_h2s (&query), prq.priority);
1547 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
1548 pmc->start = GNUNET_TIME_absolute_get ();
1549 pmc->requested = prq.request_found;
1550 GNUNET_assert (0 != GSF_get_peer_performance_data_ (cp)->pid);
1551 GNUNET_PEER_resolve (GSF_get_peer_performance_data_ (cp)->pid,
1554 GNUNET_DATASTORE_put (GSF_dsh,
1555 0, &query, dsize, &put[1],
1556 type, prq.priority, 1 /* anonymity */ ,
1557 0 /* replication */ ,
1559 1 + prq.priority, MAX_DATASTORE_QUEUE,
1560 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1561 &put_migration_continuation, pmc))
1563 put_migration_continuation (pmc, GNUNET_NO, NULL);
1569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1570 "Choosing not to keep content `%s' (%d/%d)\n",
1571 GNUNET_h2s (&query),
1572 active_to_migration, test_put_load_too_high (prq.priority));
1575 putl = GNUNET_LOAD_get_load (datastore_put_load);
1576 if ((NULL != (cp = prq.sender)) &&
1577 (GNUNET_NO == prq.request_found) &&
1578 ((GNUNET_YES != active_to_migration) ||
1579 (putl > 2.5 * (1 + prq.priority))))
1581 if (GNUNET_YES != active_to_migration)
1582 putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
1583 block_time = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1585 GNUNET_CRYPTO_random_u32
1586 (GNUNET_CRYPTO_QUALITY_WEAK,
1587 (unsigned int) (60000 * putl *
1589 GSF_block_peer_migration_ (cp, block_time);
1596 * Setup the subsystem.
1599 GSF_pending_request_init_ ()
1602 GNUNET_CONFIGURATION_get_value_number (GSF_cfg,
1604 "MAX_PENDING_REQUESTS",
1605 &max_pending_requests))
1607 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1609 ("Configuration fails to specify `%s', assuming default value."),
1610 "MAX_PENDING_REQUESTS");
1612 active_to_migration = GNUNET_CONFIGURATION_get_value_yesno (GSF_cfg,
1615 datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
1616 pr_map = GNUNET_CONTAINER_multihashmap_create (32 * 1024);
1617 requests_by_expiration_heap =
1618 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1623 * Shutdown the subsystem.
1626 GSF_pending_request_done_ ()
1628 GNUNET_CONTAINER_multihashmap_iterate (pr_map, &clean_request, NULL);
1629 GNUNET_CONTAINER_multihashmap_destroy (pr_map);
1631 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
1632 requests_by_expiration_heap = NULL;
1633 GNUNET_LOAD_value_free (datastore_put_load);
1634 datastore_put_load = NULL;
1638 /* end of gnunet-service-fs_pr.c */