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);
245 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
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,
283 const char *bf_data, size_t bf_size,
284 uint32_t mingle, uint32_t anonymity_level,
285 uint32_t priority, int32_t ttl,
286 GNUNET_PEER_Id sender_pid,
287 const GNUNET_HashCode * replies_seen,
288 unsigned int replies_seen_count,
289 GSF_PendingRequestReplyHandler rh, void *rh_cls)
291 struct GSF_PendingRequest *pr;
292 struct GSF_PendingRequest *dpr;
295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
296 "Creating request handle for `%s' of type %d\n",
297 GNUNET_h2s (query), type);
299 GNUNET_STATISTICS_update (GSF_stats,
300 gettext_noop ("# Pending requests created"), 1,
302 pr = GNUNET_malloc (sizeof (struct GSF_PendingRequest));
303 pr->local_result_offset =
304 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
305 pr->public_data.query = *query;
306 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == type)
308 GNUNET_assert (NULL != namespace);
309 pr->public_data.namespace = *namespace;
313 pr->public_data.target = *target;
314 pr->public_data.has_target = GNUNET_YES;
316 pr->public_data.anonymity_level = anonymity_level;
317 pr->public_data.priority = priority;
318 pr->public_data.original_priority = priority;
319 pr->public_data.options = options;
320 pr->public_data.type = type;
321 pr->public_data.start_time = GNUNET_TIME_absolute_get ();
322 pr->sender_pid = sender_pid;
325 GNUNET_assert ((sender_pid != 0) || (0 == (options & GSF_PRO_FORWARD_ONLY)));
327 pr->public_data.ttl =
328 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_multiply
329 (GNUNET_TIME_UNIT_SECONDS,
332 pr->public_data.ttl =
333 GNUNET_TIME_absolute_subtract (pr->public_data.start_time,
334 GNUNET_TIME_relative_multiply
335 (GNUNET_TIME_UNIT_SECONDS,
337 if (replies_seen_count > 0)
339 pr->replies_seen_size = replies_seen_count;
341 GNUNET_malloc (sizeof (GNUNET_HashCode) * pr->replies_seen_size);
342 memcpy (pr->replies_seen, replies_seen,
343 replies_seen_count * sizeof (GNUNET_HashCode));
344 pr->replies_seen_count = replies_seen_count;
349 GNUNET_CONTAINER_bloomfilter_init (bf_data, bf_size, BLOOMFILTER_K);
352 else if ((replies_seen_count > 0) &&
353 (0 != (options & GSF_PRO_BLOOMFILTER_FULL_REFRESH)))
355 GNUNET_assert (GNUNET_YES == refresh_bloomfilter (pr));
357 GNUNET_CONTAINER_multihashmap_put (pr_map, query, pr,
358 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
359 if (0 != (options & GSF_PRO_REQUEST_EXPIRES))
362 GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap, pr,
363 pr->public_data.ttl.abs_value);
364 /* make sure we don't track too many requests */
365 while (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) >
366 max_pending_requests)
368 dpr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
369 GNUNET_assert (dpr != NULL);
371 break; /* let the request live briefly... */
372 dpr->rh (dpr->rh_cls, GNUNET_BLOCK_EVALUATION_REQUEST_VALID, dpr,
373 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_BLOCK_TYPE_ANY,
375 GSF_pending_request_cancel_ (dpr, GNUNET_YES);
378 GNUNET_STATISTICS_update (GSF_stats,
379 gettext_noop ("# Pending requests active"), 1,
386 * Obtain the public data associated with a pending request
388 * @param pr pending request
389 * @return associated public data
391 struct GSF_PendingRequestData *
392 GSF_pending_request_get_data_ (struct GSF_PendingRequest *pr)
394 return &pr->public_data;
399 * Test if two pending requests are compatible (would generate
400 * the same query modulo filters and should thus be processed
403 * @param pra a pending request
404 * @param prb another pending request
405 * @return GNUNET_OK if the requests are compatible
408 GSF_pending_request_is_compatible_ (struct GSF_PendingRequest *pra,
409 struct GSF_PendingRequest *prb)
411 if ((pra->public_data.type != prb->public_data.type) ||
413 memcmp (&pra->public_data.query, &prb->public_data.query,
414 sizeof (GNUNET_HashCode))) ||
415 ((pra->public_data.type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
417 memcmp (&pra->public_data.namespace, &prb->public_data.namespace,
418 sizeof (GNUNET_HashCode)))))
426 * Update a given pending request with additional replies
427 * that have been seen.
429 * @param pr request to update
430 * @param replies_seen hash codes of replies that we've seen
431 * @param replies_seen_count size of the replies_seen array
434 GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
435 const GNUNET_HashCode * replies_seen,
436 unsigned int replies_seen_count)
439 GNUNET_HashCode mhash;
441 if (replies_seen_count + pr->replies_seen_count < pr->replies_seen_count)
442 return; /* integer overflow */
443 if (0 != (pr->public_data.options & GSF_PRO_BLOOMFILTER_FULL_REFRESH))
445 /* we're responsible for the BF, full refresh */
446 if (replies_seen_count + pr->replies_seen_count > pr->replies_seen_size)
447 GNUNET_array_grow (pr->replies_seen, pr->replies_seen_size,
448 replies_seen_count + pr->replies_seen_count);
449 memcpy (&pr->replies_seen[pr->replies_seen_count], replies_seen,
450 sizeof (GNUNET_HashCode) * replies_seen_count);
451 pr->replies_seen_count += replies_seen_count;
452 if (GNUNET_NO == refresh_bloomfilter (pr))
454 /* bf not recalculated, simply extend it with new bits */
455 for (i = 0; i < replies_seen_count; i++)
457 GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
458 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
466 /* we're not the initiator, but the initiator did not give us
467 * any bloom-filter, so we need to create one on-the-fly */
469 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
471 GNUNET_CONTAINER_bloomfilter_init (NULL,
472 compute_bloomfilter_size
473 (replies_seen_count),
476 for (i = 0; i < pr->replies_seen_count; i++)
478 GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
479 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
486 * Generate the message corresponding to the given pending request for
487 * transmission to other peers (or at least determine its size).
489 * @param pr request to generate the message for
490 * @param buf_size number of bytes available in buf
491 * @param buf where to copy the message (can be NULL)
492 * @return number of bytes needed (if > buf_size) or used
495 GSF_pending_request_get_message_ (struct GSF_PendingRequest *pr,
496 size_t buf_size, void *buf)
498 char lbuf[GNUNET_SERVER_MAX_MESSAGE_SIZE];
499 struct GetMessage *gm;
500 GNUNET_HashCode *ext;
506 struct GNUNET_TIME_Absolute now;
512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
513 "Building request message for `%s' of type %d\n",
514 GNUNET_h2s (&pr->public_data.query), pr->public_data.type);
518 do_route = (0 == (pr->public_data.options & GSF_PRO_FORWARD_ONLY));
519 if ((!do_route) && (pr->sender_pid == 0))
522 do_route = GNUNET_YES;
526 bm |= GET_MESSAGE_BIT_RETURN_TO;
529 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
531 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
534 if (GNUNET_YES == pr->public_data.has_target)
536 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
539 bf_size = GNUNET_CONTAINER_bloomfilter_get_size (pr->bf);
540 msize = sizeof (struct GetMessage) + bf_size + k * sizeof (GNUNET_HashCode);
541 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
542 if (buf_size < msize)
544 gm = (struct GetMessage *) lbuf;
545 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
546 gm->header.size = htons (msize);
547 gm->type = htonl (pr->public_data.type);
550 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
551 pr->public_data.priority + 1);
554 pr->public_data.priority -= prio;
555 gm->priority = htonl (prio);
556 now = GNUNET_TIME_absolute_get ();
557 ttl = (int64_t) (pr->public_data.ttl.abs_value - now.abs_value);
558 gm->ttl = htonl (ttl / 1000);
559 gm->filter_mutator = htonl (pr->mingle);
560 gm->hash_bitmap = htonl (bm);
561 gm->query = pr->public_data.query;
562 ext = (GNUNET_HashCode *) & gm[1];
565 GNUNET_PEER_resolve (pr->sender_pid,
566 (struct GNUNET_PeerIdentity *) &ext[k++]);
567 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
568 memcpy (&ext[k++], &pr->public_data.namespace, sizeof (GNUNET_HashCode));
569 if (GNUNET_YES == pr->public_data.has_target)
570 ext[k++] = pr->public_data.target.hashPubKey;
572 GNUNET_assert (GNUNET_SYSERR !=
573 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
576 memcpy (buf, gm, msize);
582 * Iterator to free pending requests.
584 * @param cls closure, unused
585 * @param key current key code
586 * @param value value in the hash map (pending request)
587 * @return GNUNET_YES (we should continue to iterate)
590 clean_request (void *cls, const GNUNET_HashCode * key, void *value)
592 struct GSF_PendingRequest *pr = value;
593 GSF_LocalLookupContinuation cont;
596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
597 "Cleaning up pending request for `%s'.\n", GNUNET_h2s (key));
599 if (NULL != (cont = pr->llc_cont))
602 cont (pr->llc_cont_cls, pr, pr->local_result);
604 GSF_plan_notify_request_done_ (pr);
605 GNUNET_free_non_null (pr->replies_seen);
608 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
611 GNUNET_PEER_change_rc (pr->sender_pid, -1);
613 if (NULL != pr->hnode)
615 GNUNET_CONTAINER_heap_remove_node (pr->hnode);
620 GNUNET_DATASTORE_cancel (pr->qe);
625 GNUNET_DHT_get_stop (pr->gh);
628 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
630 GNUNET_SCHEDULER_cancel (pr->warn_task);
631 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
633 GNUNET_assert (GNUNET_OK ==
634 GNUNET_CONTAINER_multihashmap_remove (pr_map,
635 &pr->public_data.query,
637 GNUNET_STATISTICS_update (GSF_stats,
638 gettext_noop ("# Pending requests active"), -1,
646 * Explicitly cancel a pending request.
648 * @param pr request to cancel
649 * @param full_cleanup fully purge the request
652 GSF_pending_request_cancel_ (struct GSF_PendingRequest *pr, int full_cleanup)
654 GSF_LocalLookupContinuation cont;
657 return; /* already cleaned up! */
658 if (GNUNET_YES != full_cleanup)
660 /* make request inactive (we're no longer interested in more results),
661 * but do NOT remove from our data-structures, we still need it there
662 * to prevent the request from looping */
664 if (NULL != (cont = pr->llc_cont))
667 cont (pr->llc_cont_cls, pr, pr->local_result);
669 GSF_plan_notify_request_done_ (pr);
672 GNUNET_DATASTORE_cancel (pr->qe);
677 GNUNET_DHT_get_stop (pr->gh);
680 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
682 GNUNET_SCHEDULER_cancel (pr->warn_task);
683 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
687 GNUNET_assert (GNUNET_YES ==
688 clean_request (NULL, &pr->public_data.query, pr));
693 * Iterate over all pending requests.
695 * @param it function to call for each request
696 * @param cls closure for it
699 GSF_iterate_pending_requests_ (GSF_PendingRequestIterator it, void *cls)
701 GNUNET_CONTAINER_multihashmap_iterate (pr_map,
702 (GNUNET_CONTAINER_HashMapIterator) it,
710 * Closure for "process_reply" function.
712 struct ProcessReplyClosure
715 * The data for the reply.
720 * Who gave us this reply? NULL for local host (or DHT)
722 struct GSF_ConnectedPeer *sender;
725 * When the reply expires.
727 struct GNUNET_TIME_Absolute expiration;
737 enum GNUNET_BLOCK_Type type;
740 * How much was this reply worth to us?
745 * Anonymity requirements for this reply.
747 uint32_t anonymity_level;
750 * Evaluation result (returned).
752 enum GNUNET_BLOCK_EvaluationResult eval;
755 * Did we find a matching request?
762 * Update the performance data for the sender (if any) since
763 * the sender successfully answered one of our queries.
765 * @param prq information about the sender
766 * @param pr request that was satisfied
769 update_request_performance_data (struct ProcessReplyClosure *prq,
770 struct GSF_PendingRequest *pr)
772 if (prq->sender == NULL)
774 GSF_peer_update_performance_ (prq->sender, pr->public_data.start_time,
780 * We have received a reply; handle it!
782 * @param cls response (struct ProcessReplyClosure)
783 * @param key our query
784 * @param value value in the hash map (info about the query)
785 * @return GNUNET_YES (we should continue to iterate)
788 process_reply (void *cls, const GNUNET_HashCode * key, void *value)
790 struct ProcessReplyClosure *prq = cls;
791 struct GSF_PendingRequest *pr = value;
792 GNUNET_HashCode chash;
797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
798 "Matched result (type %u) for query `%s' with pending request\n",
799 (unsigned int) prq->type, GNUNET_h2s (key));
801 GNUNET_STATISTICS_update (GSF_stats,
802 gettext_noop ("# replies received and matched"), 1,
805 GNUNET_BLOCK_evaluate (GSF_block_ctx, prq->type, key, &pr->bf, pr->mingle,
806 &pr->public_data.namespace,
808 GNUNET_BLOCK_TYPE_FS_SBLOCK) ?
809 sizeof (GNUNET_HashCode) : 0, prq->data,
813 case GNUNET_BLOCK_EVALUATION_OK_MORE:
814 update_request_performance_data (prq, pr);
816 case GNUNET_BLOCK_EVALUATION_OK_LAST:
817 /* short cut: stop processing early, no BF-update, etc. */
818 update_request_performance_data (prq, pr);
819 GNUNET_LOAD_update (GSF_rt_entry_lifetime,
820 GNUNET_TIME_absolute_get_duration (pr->
821 public_data.start_time).rel_value);
822 /* pass on to other peers / local clients */
823 pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
824 prq->type, prq->data, prq->size);
826 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
827 GNUNET_STATISTICS_update (GSF_stats,
829 ("# duplicate replies discarded (bloomfilter)"),
832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
833 "Duplicate response `%s', discarding.\n", GNUNET_h2s (&mhash));
835 return GNUNET_YES; /* duplicate */
836 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
837 return GNUNET_YES; /* wrong namespace */
838 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
841 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
844 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
845 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Unsupported block type %u\n"),
849 /* update bloomfilter */
850 GNUNET_CRYPTO_hash (prq->data, prq->size, &chash);
851 GSF_pending_request_update_ (pr, &chash, 1);
852 if (NULL == prq->sender)
855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
856 "Found result for query `%s' in local datastore\n",
859 GNUNET_STATISTICS_update (GSF_stats,
860 gettext_noop ("# results found locally"), 1,
865 GSF_dht_lookup_ (pr);
867 prq->priority += pr->public_data.original_priority;
868 pr->public_data.priority = 0;
869 pr->public_data.original_priority = 0;
870 pr->public_data.results_found++;
871 prq->request_found = GNUNET_YES;
872 /* finally, pass on to other peer / local client */
873 pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
874 prq->type, prq->data, prq->size);
880 * Context for the 'put_migration_continuation'.
882 struct PutMigrationContext
886 * Start time for the operation.
888 struct GNUNET_TIME_Absolute start;
893 struct GNUNET_PeerIdentity origin;
896 * GNUNET_YES if we had a matching request for this block,
904 * Continuation called to notify client about result of the
908 * @param success GNUNET_SYSERR on failure
909 * @param msg NULL on success, otherwise an error message
912 put_migration_continuation (void *cls, int success, const char *msg)
914 struct PutMigrationContext *pmc = cls;
915 struct GNUNET_TIME_Relative delay;
916 struct GNUNET_TIME_Relative block_time;
917 struct GSF_ConnectedPeer *cp;
918 struct GSF_PeerPerformanceData *ppd;
920 delay = GNUNET_TIME_absolute_get_duration (pmc->start);
921 cp = GSF_peer_get_ (&pmc->origin);
922 if ((GNUNET_OK != success) && (GNUNET_NO == pmc->requested))
924 /* block migration for a bit... */
927 ppd = GSF_get_peer_performance_data_ (cp);
928 ppd->migration_duplication++;
930 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
931 5 * ppd->migration_duplication +
932 GNUNET_CRYPTO_random_u32
933 (GNUNET_CRYPTO_QUALITY_WEAK, 5));
934 GSF_block_peer_migration_ (cp, block_time);
941 ppd = GSF_get_peer_performance_data_ (cp);
942 ppd->migration_duplication = 0; /* reset counter */
946 /* FIXME: should we really update the load value on failure? */
947 if (NULL != datastore_put_load)
948 GNUNET_LOAD_update (datastore_put_load, delay.rel_value);
949 if (GNUNET_OK == success)
951 GNUNET_STATISTICS_update (GSF_stats,
952 gettext_noop ("# Datastore `PUT' failures"), 1,
958 * Test if the DATABASE (PUT) load on this peer is too high
959 * to even consider processing the query at
962 * @return GNUNET_YES if the load is too high to do anything (load high)
963 * GNUNET_NO to process normally (load normal or low)
966 test_put_load_too_high (uint32_t priority)
970 if (NULL == datastore_put_load)
972 if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
973 return GNUNET_NO; /* very fast */
974 ld = GNUNET_LOAD_get_load (datastore_put_load);
975 if (ld < 2.0 * (1 + priority))
977 GNUNET_STATISTICS_update (GSF_stats,
979 ("# storage requests dropped due to high load"), 1,
986 * Iterator called on each result obtained for a DHT
987 * operation that expects a reply
990 * @param exp when will this value expire
991 * @param key key of the result
992 * @param get_path NULL-terminated array of pointers
993 * to the peers on reverse GET path (or NULL if not recorded)
994 * @param put_path NULL-terminated array of pointers
995 * to the peers on the PUT path (or NULL if not recorded)
996 * @param type type of the result
997 * @param size number of bytes in data
998 * @param data pointer to the result data
1001 handle_dht_reply (void *cls, struct GNUNET_TIME_Absolute exp,
1002 const GNUNET_HashCode * key,
1003 const struct GNUNET_PeerIdentity *const *get_path,
1004 const struct GNUNET_PeerIdentity *const *put_path,
1005 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1007 struct GSF_PendingRequest *pr = cls;
1008 struct ProcessReplyClosure prq;
1009 struct PutMigrationContext *pmc;
1011 GNUNET_STATISTICS_update (GSF_stats,
1012 gettext_noop ("# Replies received from DHT"), 1,
1014 memset (&prq, 0, sizeof (prq));
1016 prq.expiration = exp;
1019 process_reply (&prq, key, pr);
1020 if ((GNUNET_YES == active_to_migration) &&
1021 (GNUNET_NO == test_put_load_too_high (prq.priority)))
1024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1025 "Replicating result for query `%s' with priority %u\n",
1026 GNUNET_h2s (key), prq.priority);
1028 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
1029 pmc->start = GNUNET_TIME_absolute_get ();
1030 pmc->requested = GNUNET_YES;
1032 GNUNET_DATASTORE_put (GSF_dsh, 0, key, size, data, type, prq.priority,
1034 0 /* replication */ ,
1035 exp, 1 + prq.priority, MAX_DATASTORE_QUEUE,
1036 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1037 &put_migration_continuation, pmc))
1039 put_migration_continuation (pmc, GNUNET_NO, NULL);
1046 * Consider looking up the data in the DHT (anonymity-level permitting).
1048 * @param pr the pending request to process
1051 GSF_dht_lookup_ (struct GSF_PendingRequest *pr)
1055 struct GNUNET_PeerIdentity pi;
1056 char buf[sizeof (GNUNET_HashCode) * 2];
1058 if (0 != pr->public_data.anonymity_level)
1062 GNUNET_DHT_get_stop (pr->gh);
1067 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
1070 memcpy (buf, &pr->public_data.namespace, sizeof (GNUNET_HashCode));
1071 xquery_size = sizeof (GNUNET_HashCode);
1073 if (0 != (pr->public_data.options & GSF_PRO_FORWARD_ONLY))
1075 GNUNET_assert (0 != pr->sender_pid);
1076 GNUNET_PEER_resolve (pr->sender_pid, &pi);
1077 memcpy (&buf[xquery_size], &pi, sizeof (struct GNUNET_PeerIdentity));
1078 xquery_size += sizeof (struct GNUNET_PeerIdentity);
1081 GNUNET_DHT_get_start (GSF_dht, GNUNET_TIME_UNIT_FOREVER_REL,
1082 pr->public_data.type, &pr->public_data.query,
1083 DEFAULT_GET_REPLICATION,
1084 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, pr->bf,
1085 pr->mingle, xquery, xquery_size, &handle_dht_reply,
1091 * Task that issues a warning if the datastore lookup takes too long.
1093 * @param cls the 'struct GSF_PendingRequest'
1094 * @param tc task context
1097 warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1099 struct GSF_PendingRequest *pr = cls;
1101 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1102 _("Datastore lookup already took %llu ms!\n"),
1103 (unsigned long long)
1104 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1106 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1112 * Task that issues a warning if the datastore lookup takes too long.
1114 * @param cls the 'struct GSF_PendingRequest'
1115 * @param tc task context
1118 odc_warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1120 struct GSF_PendingRequest *pr = cls;
1122 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1123 _("On-demand lookup already took %llu ms!\n"),
1124 (unsigned long long)
1125 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1127 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1128 &odc_warn_delay_task, pr);
1133 * We're processing (local) results for a search request
1134 * from another peer. Pass applicable results to the
1135 * peer and if we are done either clean up (operation
1136 * complete) or forward to other peers (more results possible).
1138 * @param cls our closure (struct PendingRequest)
1139 * @param key key for the content
1140 * @param size number of bytes in data
1141 * @param data content stored
1142 * @param type type of the content
1143 * @param priority priority of the content
1144 * @param anonymity anonymity-level for the content
1145 * @param expiration expiration time for the content
1146 * @param uid unique identifier for the datum;
1147 * maybe 0 if no unique identifier is available
1150 process_local_reply (void *cls, const GNUNET_HashCode * key, size_t size,
1151 const void *data, enum GNUNET_BLOCK_Type type,
1152 uint32_t priority, uint32_t anonymity,
1153 struct GNUNET_TIME_Absolute expiration, uint64_t uid)
1155 struct GSF_PendingRequest *pr = cls;
1156 GSF_LocalLookupContinuation cont;
1157 struct ProcessReplyClosure prq;
1158 GNUNET_HashCode query;
1159 unsigned int old_rf;
1161 GNUNET_SCHEDULER_cancel (pr->warn_task);
1162 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1168 GNUNET_STATISTICS_update (GSF_stats,
1170 ("# Datastore lookups concluded (no results)"),
1173 if (GNUNET_NO == pr->have_first_uid)
1175 pr->first_uid = uid;
1176 pr->have_first_uid = 1;
1180 if ((uid == pr->first_uid) && (key != NULL))
1182 GNUNET_STATISTICS_update (GSF_stats,
1184 ("# Datastore lookups concluded (seen all)"),
1186 key = NULL; /* all replies seen! */
1188 pr->have_first_uid++;
1189 if ((pr->have_first_uid > MAX_RESULTS) && (key != NULL))
1191 GNUNET_STATISTICS_update (GSF_stats,
1193 ("# Datastore lookups aborted (more than MAX_RESULTS)"),
1195 key = NULL; /* all replies seen! */
1202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1203 "No further local responses available.\n");
1205 if ((pr->public_data.type == GNUNET_BLOCK_TYPE_FS_DBLOCK) ||
1206 (pr->public_data.type == GNUNET_BLOCK_TYPE_FS_IBLOCK))
1207 GNUNET_STATISTICS_update (GSF_stats,
1209 ("# requested DBLOCK or IBLOCK not found"), 1,
1211 goto check_error_and_continue;
1214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1215 "Received reply for `%s' of type %d with UID %llu from datastore.\n",
1216 GNUNET_h2s (key), type, (unsigned long long) uid);
1218 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1222 "Found ONDEMAND block, performing on-demand encoding\n");
1224 GNUNET_STATISTICS_update (GSF_stats,
1226 ("# on-demand blocks matched requests"), 1,
1228 pr->qe_start = GNUNET_TIME_absolute_get ();
1230 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1231 &odc_warn_delay_task, pr);
1233 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
1234 anonymity, expiration, uid,
1235 &process_local_reply, pr))
1237 GNUNET_STATISTICS_update (GSF_stats,
1239 ("# on-demand lookups performed successfully"),
1241 return; /* we're done */
1243 GNUNET_STATISTICS_update (GSF_stats,
1244 gettext_noop ("# on-demand lookups failed"), 1,
1246 GNUNET_SCHEDULER_cancel (pr->warn_task);
1248 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1249 &warn_delay_task, pr);
1251 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
1252 &pr->public_data.query,
1253 pr->public_data.type ==
1254 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1255 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1257 (GSF_PRO_PRIORITY_UNLIMITED &
1258 pr->public_data.options)) ? UINT_MAX : 1
1259 /* queue priority */ ,
1261 (GSF_PRO_PRIORITY_UNLIMITED &
1262 pr->public_data.options)) ? UINT_MAX : 1
1263 /* max queue size */ ,
1264 GNUNET_TIME_UNIT_FOREVER_REL,
1265 &process_local_reply, pr);
1268 GNUNET_STATISTICS_update (GSF_stats,
1270 ("# Datastore lookups concluded (error queueing)"),
1272 return; /* we're done */
1274 goto check_error_and_continue;
1276 old_rf = pr->public_data.results_found;
1277 memset (&prq, 0, sizeof (prq));
1279 prq.expiration = expiration;
1282 GNUNET_BLOCK_get_key (GSF_block_ctx, type, data, size, &query))
1285 GNUNET_DATASTORE_remove (GSF_dsh, key, size, data, -1, -1,
1286 GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
1287 pr->qe_start = GNUNET_TIME_absolute_get ();
1289 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1290 &warn_delay_task, pr);
1292 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
1293 &pr->public_data.query,
1294 pr->public_data.type ==
1295 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1296 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1298 (GSF_PRO_PRIORITY_UNLIMITED &
1299 pr->public_data.options)) ? UINT_MAX : 1
1300 /* queue priority */ ,
1302 (GSF_PRO_PRIORITY_UNLIMITED &
1303 pr->public_data.options)) ? UINT_MAX : 1
1304 /* max queue size */ ,
1305 GNUNET_TIME_UNIT_FOREVER_REL,
1306 &process_local_reply, pr);
1309 GNUNET_STATISTICS_update (GSF_stats,
1311 ("# Datastore lookups concluded (error queueing)"),
1313 goto check_error_and_continue;
1318 prq.priority = priority;
1319 prq.request_found = GNUNET_NO;
1320 prq.anonymity_level = anonymity;
1321 if ((old_rf == 0) && (pr->public_data.results_found == 0))
1322 GSF_update_datastore_delay_ (pr->public_data.start_time);
1323 process_reply (&prq, key, pr);
1324 pr->local_result = prq.eval;
1325 if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
1327 GNUNET_STATISTICS_update (GSF_stats,
1329 ("# Datastore lookups concluded (found ultimate result)"),
1331 goto check_error_and_continue;
1333 if ((0 == (GSF_PRO_PRIORITY_UNLIMITED & pr->public_data.options)) &&
1334 ((GNUNET_YES == GSF_test_get_load_too_high_ (0)) ||
1335 (pr->public_data.results_found > 5 + 2 * pr->public_data.priority)))
1338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load too high, done with request\n");
1340 GNUNET_STATISTICS_update (GSF_stats,
1342 ("# Datastore lookups concluded (load too high)"),
1344 goto check_error_and_continue;
1346 pr->qe_start = GNUNET_TIME_absolute_get ();
1348 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1351 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
1352 &pr->public_data.query,
1353 pr->public_data.type ==
1354 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1355 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1357 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1358 public_data.options)) ? UINT_MAX : 1
1359 /* queue priority */ ,
1361 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1362 public_data.options)) ? UINT_MAX : 1
1363 /* max queue size */ ,
1364 GNUNET_TIME_UNIT_FOREVER_REL,
1365 &process_local_reply, pr);
1366 /* check if we successfully queued another datastore request;
1367 * if so, return, otherwise call our continuation (if we have
1369 check_error_and_continue:
1372 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
1374 GNUNET_SCHEDULER_cancel (pr->warn_task);
1375 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1377 if (NULL == (cont = pr->llc_cont))
1378 return; /* no continuation */
1379 pr->llc_cont = NULL;
1380 cont (pr->llc_cont_cls, pr, pr->local_result);
1385 * Look up the request in the local datastore.
1387 * @param pr the pending request to process
1388 * @param cont function to call at the end
1389 * @param cont_cls closure for cont
1392 GSF_local_lookup_ (struct GSF_PendingRequest *pr,
1393 GSF_LocalLookupContinuation cont, void *cont_cls)
1395 GNUNET_assert (NULL == pr->gh);
1396 GNUNET_assert (NULL == pr->llc_cont);
1397 pr->llc_cont = cont;
1398 pr->llc_cont_cls = cont_cls;
1399 pr->qe_start = GNUNET_TIME_absolute_get ();
1401 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1403 GNUNET_STATISTICS_update (GSF_stats,
1404 gettext_noop ("# Datastore lookups initiated"), 1,
1407 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
1408 &pr->public_data.query,
1409 pr->public_data.type ==
1410 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1411 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1413 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1414 public_data.options)) ? UINT_MAX : 1
1415 /* queue priority */ ,
1417 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1418 public_data.options)) ? UINT_MAX : 1
1419 /* max queue size */ ,
1420 GNUNET_TIME_UNIT_FOREVER_REL,
1421 &process_local_reply, pr);
1424 GNUNET_STATISTICS_update (GSF_stats,
1426 ("# Datastore lookups concluded (error queueing)"),
1431 GNUNET_SCHEDULER_cancel (pr->warn_task);
1432 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1433 pr->llc_cont = NULL;
1435 cont (cont_cls, pr, pr->local_result);
1441 * Handle P2P "CONTENT" message. Checks that the message is
1442 * well-formed and then checks if there are any pending requests for
1443 * this content and possibly passes it on (to local clients or other
1444 * peers). Does NOT perform migration (content caching at this peer).
1446 * @param cp the other peer involved (sender or receiver, NULL
1447 * for loopback messages where we are both sender and receiver)
1448 * @param message the actual message
1449 * @return GNUNET_OK if the message was well-formed,
1450 * GNUNET_SYSERR if the message was malformed (close connection,
1451 * do not cache under any circumstances)
1454 GSF_handle_p2p_content_ (struct GSF_ConnectedPeer *cp,
1455 const struct GNUNET_MessageHeader *message)
1457 const struct PutMessage *put;
1460 enum GNUNET_BLOCK_Type type;
1461 struct GNUNET_TIME_Absolute expiration;
1462 GNUNET_HashCode query;
1463 struct ProcessReplyClosure prq;
1464 struct GNUNET_TIME_Relative block_time;
1466 struct PutMigrationContext *pmc;
1468 msize = ntohs (message->size);
1469 if (msize < sizeof (struct PutMessage))
1471 GNUNET_break_op (0);
1472 return GNUNET_SYSERR;
1474 put = (const struct PutMessage *) message;
1475 dsize = msize - sizeof (struct PutMessage);
1476 type = ntohl (put->type);
1477 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
1478 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1479 return GNUNET_SYSERR;
1481 GNUNET_BLOCK_get_key (GSF_block_ctx, type, &put[1], dsize, &query))
1483 GNUNET_break_op (0);
1484 return GNUNET_SYSERR;
1486 GNUNET_STATISTICS_update (GSF_stats,
1487 gettext_noop ("# GAP PUT messages received"), 1,
1489 /* now, lookup 'query' */
1490 prq.data = (const void *) &put[1];
1497 prq.expiration = expiration;
1499 prq.anonymity_level = UINT32_MAX;
1500 prq.request_found = GNUNET_NO;
1501 GNUNET_CONTAINER_multihashmap_get_multiple (pr_map, &query, &process_reply,
1505 GSF_connected_peer_change_preference_ (cp,
1506 CONTENT_BANDWIDTH_VALUE +
1507 1000 * prq.priority);
1508 GSF_get_peer_performance_data_ (cp)->trust += prq.priority;
1510 if ((GNUNET_YES == active_to_migration) &&
1511 (GNUNET_NO == test_put_load_too_high (prq.priority)))
1514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1515 "Replicating result for query `%s' with priority %u\n",
1516 GNUNET_h2s (&query), prq.priority);
1518 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
1519 pmc->start = GNUNET_TIME_absolute_get ();
1520 pmc->requested = prq.request_found;
1521 GNUNET_assert (0 != GSF_get_peer_performance_data_ (cp)->pid);
1522 GNUNET_PEER_resolve (GSF_get_peer_performance_data_ (cp)->pid,
1525 GNUNET_DATASTORE_put (GSF_dsh, 0, &query, dsize, &put[1], type,
1526 prq.priority, 1 /* anonymity */ ,
1527 0 /* replication */ ,
1528 expiration, 1 + prq.priority, MAX_DATASTORE_QUEUE,
1529 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1530 &put_migration_continuation, pmc))
1532 put_migration_continuation (pmc, GNUNET_NO, NULL);
1538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1539 "Choosing not to keep content `%s' (%d/%d)\n",
1540 GNUNET_h2s (&query), active_to_migration,
1541 test_put_load_too_high (prq.priority));
1544 putl = GNUNET_LOAD_get_load (datastore_put_load);
1545 if ((NULL != (cp = prq.sender)) && (GNUNET_NO == prq.request_found) &&
1546 ((GNUNET_YES != active_to_migration) ||
1547 (putl > 2.5 * (1 + prq.priority))))
1549 if (GNUNET_YES != active_to_migration)
1550 putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
1552 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1554 GNUNET_CRYPTO_random_u32
1555 (GNUNET_CRYPTO_QUALITY_WEAK,
1556 (unsigned int) (60000 * putl * putl)));
1557 GSF_block_peer_migration_ (cp, block_time);
1564 * Setup the subsystem.
1567 GSF_pending_request_init_ ()
1570 GNUNET_CONFIGURATION_get_value_number (GSF_cfg, "fs",
1571 "MAX_PENDING_REQUESTS",
1572 &max_pending_requests))
1574 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1576 ("Configuration fails to specify `%s', assuming default value."),
1577 "MAX_PENDING_REQUESTS");
1579 active_to_migration =
1580 GNUNET_CONFIGURATION_get_value_yesno (GSF_cfg, "FS", "CONTENT_CACHING");
1581 datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
1582 pr_map = GNUNET_CONTAINER_multihashmap_create (32 * 1024);
1583 requests_by_expiration_heap =
1584 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1589 * Shutdown the subsystem.
1592 GSF_pending_request_done_ ()
1594 GNUNET_CONTAINER_multihashmap_iterate (pr_map, &clean_request, NULL);
1595 GNUNET_CONTAINER_multihashmap_destroy (pr_map);
1597 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
1598 requests_by_expiration_heap = NULL;
1599 GNUNET_LOAD_value_free (datastore_put_load);
1600 datastore_put_load = NULL;
1604 /* end of gnunet-service-fs_pr.c */