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 * Maximum size of the datastore queue for P2P operations. Needs to
36 * be large enough to queue MAX_QUEUE_PER_PEER operations for roughly
37 * the number of active (connected) peers.
39 #define MAX_DATASTORE_QUEUE (16 * MAX_QUEUE_PER_PEER)
42 * Bandwidth value of a 0-priority content (must be fairly high
43 * compared to query since content is typically significantly larger
44 * -- and more valueable since it can take many queries to get one
47 #define CONTENT_BANDWIDTH_VALUE 800
50 * Hard limit on the number of results we may get from the datastore per query.
52 #define MAX_RESULTS (100 * 1024)
57 struct GSF_PendingRequest
60 * Public data for the request.
62 struct GSF_PendingRequestData public_data;
65 * Function to call if we encounter a reply.
67 GSF_PendingRequestReplyHandler rh;
75 * Array of hash codes of replies we've already seen.
77 GNUNET_HashCode *replies_seen;
80 * Bloomfilter masking replies we've already seen.
82 struct GNUNET_CONTAINER_BloomFilter *bf;
85 * Entry for this pending request in the expiration heap, or NULL.
87 struct GNUNET_CONTAINER_HeapNode *hnode;
90 * Datastore queue entry for this request (or NULL for none).
92 struct GNUNET_DATASTORE_QueueEntry *qe;
95 * DHT request handle for this request (or NULL for none).
97 struct GNUNET_DHT_GetHandle *gh;
100 * Function to call upon completion of the local get
101 * request, or NULL for none.
103 GSF_LocalLookupContinuation llc_cont;
106 * Closure for llc_cont.
111 * Last result from the local datastore lookup evaluation.
113 enum GNUNET_BLOCK_EvaluationResult local_result;
116 * Identity of the peer that we should use for the 'sender'
117 * (recipient of the response) when forwarding (0 for none).
119 GNUNET_PEER_Id sender_pid;
122 * Identity of the peer that we should never forward this query
123 * to since it originated this query (0 for none).
125 GNUNET_PEER_Id origin_pid;
128 * Time we started the last datastore lookup.
130 struct GNUNET_TIME_Absolute qe_start;
133 * Task that warns us if the local datastore lookup takes too long.
135 GNUNET_SCHEDULER_TaskIdentifier warn_task;
138 * Current offset for querying our local datastore for results.
139 * Starts at a random value, incremented until we get the same
140 * UID again (detected using 'first_uid'), which is then used
141 * to termiante the iteration.
143 uint64_t local_result_offset;
146 * Unique ID of the first result from the local datastore;
147 * used to detect wrap-around of the offset.
152 * Number of valid entries in the 'replies_seen' array.
154 unsigned int replies_seen_count;
157 * Length of the 'replies_seen' array.
159 unsigned int replies_seen_size;
162 * Mingle value we currently use for the bf.
167 * Do we have a first UID yet?
169 unsigned int have_first_uid;
175 * All pending requests, ordered by the query. Entries
176 * are of type 'struct GSF_PendingRequest*'.
178 static struct GNUNET_CONTAINER_MultiHashMap *pr_map;
182 * Datastore 'PUT' load tracking.
184 static struct GNUNET_LOAD_Value *datastore_put_load;
188 * Are we allowed to migrate content to this peer.
190 static int active_to_migration;
194 * Size of the datastore queue we assume for common requests.
195 * Determined based on the network quota.
197 static unsigned int datastore_queue_size;
200 * Heap with the request that will expire next at the top. Contains
201 * pointers of type "struct PendingRequest*"; these will *also* be
202 * aliased from the "requests_by_peer" data structures and the
203 * "requests_by_query" table. Note that requests from our clients
204 * don't expire and are thus NOT in the "requests_by_expiration"
205 * (or the "requests_by_peer" tables).
207 static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
211 * Maximum number of requests (from other peers, overall) that we're
212 * willing to have pending at any given point in time. Can be changed
213 * via the configuration file (32k is just the default).
215 static unsigned long long max_pending_requests = (32 * 1024);
220 * Recalculate our bloom filter for filtering replies. This function
221 * will create a new bloom filter from scratch, so it should only be
222 * called if we have no bloomfilter at all (and hence can create a
223 * fresh one of minimal size without problems) OR if our peer is the
224 * initiator (in which case we may resize to larger than mimimum size).
226 * @param pr request for which the BF is to be recomputed
229 refresh_bloomfilter (struct GSF_PendingRequest *pr)
232 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
234 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
236 GNUNET_BLOCK_construct_bloomfilter (pr->mingle, pr->replies_seen,
237 pr->replies_seen_count);
242 * Create a new pending request.
244 * @param options request options
245 * @param type type of the block that is being requested
246 * @param query key for the lookup
247 * @param namespace namespace to lookup, NULL for no namespace
248 * @param target preferred target for the request, NULL for none
249 * @param bf_data raw data for bloom filter for known replies, can be NULL
250 * @param bf_size number of bytes in bf_data
251 * @param mingle mingle value for bf
252 * @param anonymity_level desired anonymity level
253 * @param priority maximum outgoing cummulative request priority to use
254 * @param ttl current time-to-live for the request
255 * @param sender_pid peer ID to use for the sender when forwarding, 0 for none
256 * @param origin_pid peer ID of origin of query (do not loop back)
257 * @param replies_seen hash codes of known local replies
258 * @param replies_seen_count size of the 'replies_seen' array
259 * @param rh handle to call when we get a reply
260 * @param rh_cls closure for rh
261 * @return handle for the new pending request
263 struct GSF_PendingRequest *
264 GSF_pending_request_create_ (enum GSF_PendingRequestOptions options,
265 enum GNUNET_BLOCK_Type type,
266 const GNUNET_HashCode * query,
267 const GNUNET_HashCode * namespace,
268 const struct GNUNET_PeerIdentity *target,
269 const char *bf_data, size_t bf_size,
270 uint32_t mingle, uint32_t anonymity_level,
271 uint32_t priority, int32_t ttl,
272 GNUNET_PEER_Id sender_pid,
273 GNUNET_PEER_Id origin_pid,
274 const GNUNET_HashCode * replies_seen,
275 unsigned int replies_seen_count,
276 GSF_PendingRequestReplyHandler rh, void *rh_cls)
278 struct GSF_PendingRequest *pr;
279 struct GSF_PendingRequest *dpr;
282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
283 "Creating request handle for `%s' of type %d\n",
284 GNUNET_h2s (query), type);
286 GNUNET_STATISTICS_update (GSF_stats,
287 gettext_noop ("# Pending requests created"), 1,
289 pr = GNUNET_malloc (sizeof (struct GSF_PendingRequest));
290 pr->local_result_offset =
291 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
292 pr->public_data.query = *query;
293 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == type)
295 GNUNET_assert (NULL != namespace);
296 pr->public_data.namespace = *namespace;
300 pr->public_data.target = *target;
301 pr->public_data.has_target = GNUNET_YES;
303 pr->public_data.anonymity_level = anonymity_level;
304 pr->public_data.priority = priority;
305 pr->public_data.original_priority = priority;
306 pr->public_data.options = options;
307 pr->public_data.type = type;
308 pr->public_data.start_time = GNUNET_TIME_absolute_get ();
309 pr->sender_pid = sender_pid;
310 pr->origin_pid = origin_pid;
313 GNUNET_assert ((sender_pid != 0) || (0 == (options & GSF_PRO_FORWARD_ONLY)));
315 pr->public_data.ttl =
316 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_multiply
317 (GNUNET_TIME_UNIT_SECONDS,
320 pr->public_data.ttl =
321 GNUNET_TIME_absolute_subtract (pr->public_data.start_time,
322 GNUNET_TIME_relative_multiply
323 (GNUNET_TIME_UNIT_SECONDS,
325 if (replies_seen_count > 0)
327 pr->replies_seen_size = replies_seen_count;
329 GNUNET_malloc (sizeof (GNUNET_HashCode) * pr->replies_seen_size);
330 memcpy (pr->replies_seen, replies_seen,
331 replies_seen_count * sizeof (GNUNET_HashCode));
332 pr->replies_seen_count = replies_seen_count;
337 GNUNET_CONTAINER_bloomfilter_init (bf_data, bf_size,
338 GNUNET_CONSTANTS_BLOOMFILTER_K);
341 else if ((replies_seen_count > 0) &&
342 (0 != (options & GSF_PRO_BLOOMFILTER_FULL_REFRESH)))
344 refresh_bloomfilter (pr);
346 GNUNET_CONTAINER_multihashmap_put (pr_map, query, pr,
347 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
348 if (0 == (options & GSF_PRO_REQUEST_NEVER_EXPIRES))
351 GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap, pr,
352 pr->public_data.ttl.abs_value);
353 /* make sure we don't track too many requests */
354 while (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) >
355 max_pending_requests)
357 dpr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
358 GNUNET_assert (dpr != NULL);
360 break; /* let the request live briefly... */
361 dpr->rh (dpr->rh_cls, GNUNET_BLOCK_EVALUATION_REQUEST_VALID, dpr,
362 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_BLOCK_TYPE_ANY,
364 GSF_pending_request_cancel_ (dpr, GNUNET_YES);
367 GNUNET_STATISTICS_update (GSF_stats,
368 gettext_noop ("# Pending requests active"), 1,
375 * Obtain the public data associated with a pending request
377 * @param pr pending request
378 * @return associated public data
380 struct GSF_PendingRequestData *
381 GSF_pending_request_get_data_ (struct GSF_PendingRequest *pr)
383 return &pr->public_data;
388 * Test if two pending requests are compatible (would generate
389 * the same query modulo filters and should thus be processed
392 * @param pra a pending request
393 * @param prb another pending request
394 * @return GNUNET_OK if the requests are compatible
397 GSF_pending_request_is_compatible_ (struct GSF_PendingRequest *pra,
398 struct GSF_PendingRequest *prb)
400 if ((pra->public_data.type != prb->public_data.type) ||
402 memcmp (&pra->public_data.query, &prb->public_data.query,
403 sizeof (GNUNET_HashCode))) ||
404 ((pra->public_data.type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
406 memcmp (&pra->public_data.namespace, &prb->public_data.namespace,
407 sizeof (GNUNET_HashCode)))))
415 * Update a given pending request with additional replies
416 * that have been seen.
418 * @param pr request to update
419 * @param replies_seen hash codes of replies that we've seen
420 * @param replies_seen_count size of the replies_seen array
423 GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
424 const GNUNET_HashCode * replies_seen,
425 unsigned int replies_seen_count)
428 GNUNET_HashCode mhash;
430 if (replies_seen_count + pr->replies_seen_count < pr->replies_seen_count)
431 return; /* integer overflow */
432 if (0 != (pr->public_data.options & GSF_PRO_BLOOMFILTER_FULL_REFRESH))
434 /* we're responsible for the BF, full refresh */
435 if (replies_seen_count + pr->replies_seen_count > pr->replies_seen_size)
436 GNUNET_array_grow (pr->replies_seen, pr->replies_seen_size,
437 replies_seen_count + pr->replies_seen_count);
438 memcpy (&pr->replies_seen[pr->replies_seen_count], replies_seen,
439 sizeof (GNUNET_HashCode) * replies_seen_count);
440 pr->replies_seen_count += replies_seen_count;
441 refresh_bloomfilter (pr);
447 /* we're not the initiator, but the initiator did not give us
448 * any bloom-filter, so we need to create one on-the-fly */
450 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
452 GNUNET_BLOCK_construct_bloomfilter (pr->mingle, replies_seen,
457 for (i = 0; i < pr->replies_seen_count; i++)
459 GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
460 GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
468 * Generate the message corresponding to the given pending request for
469 * transmission to other peers (or at least determine its size).
471 * @param pr request to generate the message for
472 * @param buf_size number of bytes available in buf
473 * @param buf where to copy the message (can be NULL)
474 * @return number of bytes needed (if > buf_size) or used
477 GSF_pending_request_get_message_ (struct GSF_PendingRequest *pr,
478 size_t buf_size, void *buf)
480 char lbuf[GNUNET_SERVER_MAX_MESSAGE_SIZE];
481 struct GetMessage *gm;
482 GNUNET_HashCode *ext;
488 struct GNUNET_TIME_Absolute now;
494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
495 "Building request message for `%s' of type %d\n",
496 GNUNET_h2s (&pr->public_data.query), pr->public_data.type);
500 do_route = (0 == (pr->public_data.options & GSF_PRO_FORWARD_ONLY));
501 if ((!do_route) && (pr->sender_pid == 0))
504 do_route = GNUNET_YES;
508 bm |= GET_MESSAGE_BIT_RETURN_TO;
511 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
513 bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
516 if (GNUNET_YES == pr->public_data.has_target)
518 bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
521 bf_size = GNUNET_CONTAINER_bloomfilter_get_size (pr->bf);
522 msize = sizeof (struct GetMessage) + bf_size + k * sizeof (GNUNET_HashCode);
523 GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
524 if (buf_size < msize)
526 gm = (struct GetMessage *) lbuf;
527 gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
528 gm->header.size = htons (msize);
529 gm->type = htonl (pr->public_data.type);
532 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
533 pr->public_data.priority + 1);
536 pr->public_data.priority -= prio;
537 gm->priority = htonl (prio);
538 now = GNUNET_TIME_absolute_get ();
539 ttl = (int64_t) (pr->public_data.ttl.abs_value - now.abs_value);
540 gm->ttl = htonl (ttl / 1000);
541 gm->filter_mutator = htonl (pr->mingle);
542 gm->hash_bitmap = htonl (bm);
543 gm->query = pr->public_data.query;
544 ext = (GNUNET_HashCode *) & gm[1];
547 GNUNET_PEER_resolve (pr->sender_pid,
548 (struct GNUNET_PeerIdentity *) &ext[k++]);
549 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
550 memcpy (&ext[k++], &pr->public_data.namespace, sizeof (GNUNET_HashCode));
551 if (GNUNET_YES == pr->public_data.has_target)
552 ext[k++] = pr->public_data.target.hashPubKey;
554 GNUNET_assert (GNUNET_SYSERR !=
555 GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
558 memcpy (buf, gm, msize);
564 * Iterator to free pending requests.
566 * @param cls closure, unused
567 * @param key current key code
568 * @param value value in the hash map (pending request)
569 * @return GNUNET_YES (we should continue to iterate)
572 clean_request (void *cls, const GNUNET_HashCode * key, void *value)
574 struct GSF_PendingRequest *pr = value;
575 GSF_LocalLookupContinuation cont;
578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
579 "Cleaning up pending request for `%s'.\n", GNUNET_h2s (key));
581 if (NULL != (cont = pr->llc_cont))
584 cont (pr->llc_cont_cls, pr, pr->local_result);
586 GSF_plan_notify_request_done_ (pr);
587 GNUNET_free_non_null (pr->replies_seen);
590 GNUNET_CONTAINER_bloomfilter_free (pr->bf);
593 GNUNET_PEER_change_rc (pr->sender_pid, -1);
595 GNUNET_PEER_change_rc (pr->origin_pid, -1);
597 if (NULL != pr->hnode)
599 GNUNET_CONTAINER_heap_remove_node (pr->hnode);
604 GNUNET_DATASTORE_cancel (pr->qe);
609 GNUNET_DHT_get_stop (pr->gh);
612 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
614 GNUNET_SCHEDULER_cancel (pr->warn_task);
615 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
617 GNUNET_assert (GNUNET_OK ==
618 GNUNET_CONTAINER_multihashmap_remove (pr_map,
619 &pr->public_data.query,
621 GNUNET_STATISTICS_update (GSF_stats,
622 gettext_noop ("# Pending requests active"), -1,
630 * Explicitly cancel a pending request.
632 * @param pr request to cancel
633 * @param full_cleanup fully purge the request
636 GSF_pending_request_cancel_ (struct GSF_PendingRequest *pr, int full_cleanup)
638 GSF_LocalLookupContinuation cont;
641 return; /* already cleaned up! */
642 if (GNUNET_YES != full_cleanup)
644 /* make request inactive (we're no longer interested in more results),
645 * but do NOT remove from our data-structures, we still need it there
646 * to prevent the request from looping */
648 if (NULL != (cont = pr->llc_cont))
651 cont (pr->llc_cont_cls, pr, pr->local_result);
653 GSF_plan_notify_request_done_ (pr);
656 GNUNET_DATASTORE_cancel (pr->qe);
661 GNUNET_DHT_get_stop (pr->gh);
664 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
666 GNUNET_SCHEDULER_cancel (pr->warn_task);
667 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
671 GNUNET_assert (GNUNET_YES ==
672 clean_request (NULL, &pr->public_data.query, pr));
677 * Iterate over all pending requests.
679 * @param it function to call for each request
680 * @param cls closure for it
683 GSF_iterate_pending_requests_ (GSF_PendingRequestIterator it, void *cls)
685 GNUNET_CONTAINER_multihashmap_iterate (pr_map,
686 (GNUNET_CONTAINER_HashMapIterator) it,
694 * Closure for "process_reply" function.
696 struct ProcessReplyClosure
699 * The data for the reply.
704 * Who gave us this reply? NULL for local host (or DHT)
706 struct GSF_ConnectedPeer *sender;
709 * When the reply expires.
711 struct GNUNET_TIME_Absolute expiration;
721 enum GNUNET_BLOCK_Type type;
724 * How much was this reply worth to us?
729 * Anonymity requirements for this reply.
731 uint32_t anonymity_level;
734 * Evaluation result (returned).
736 enum GNUNET_BLOCK_EvaluationResult eval;
739 * Did we find a matching request?
746 * Update the performance data for the sender (if any) since
747 * the sender successfully answered one of our queries.
749 * @param prq information about the sender
750 * @param pr request that was satisfied
753 update_request_performance_data (struct ProcessReplyClosure *prq,
754 struct GSF_PendingRequest *pr)
756 if (prq->sender == NULL)
758 GSF_peer_update_performance_ (prq->sender, pr->public_data.start_time,
764 * We have received a reply; handle it!
766 * @param cls response (struct ProcessReplyClosure)
767 * @param key our query
768 * @param value value in the hash map (info about the query)
769 * @return GNUNET_YES (we should continue to iterate)
772 process_reply (void *cls, const GNUNET_HashCode * key, void *value)
774 struct ProcessReplyClosure *prq = cls;
775 struct GSF_PendingRequest *pr = value;
776 GNUNET_HashCode chash;
781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
782 "Matched result (type %u) for query `%s' with pending request\n",
783 (unsigned int) prq->type, GNUNET_h2s (key));
785 GNUNET_STATISTICS_update (GSF_stats,
786 gettext_noop ("# replies received and matched"), 1,
789 GNUNET_BLOCK_evaluate (GSF_block_ctx, prq->type, key, &pr->bf, pr->mingle,
790 &pr->public_data.namespace,
792 GNUNET_BLOCK_TYPE_FS_SBLOCK) ?
793 sizeof (GNUNET_HashCode) : 0, prq->data,
797 case GNUNET_BLOCK_EVALUATION_OK_MORE:
798 update_request_performance_data (prq, pr);
800 case GNUNET_BLOCK_EVALUATION_OK_LAST:
801 /* short cut: stop processing early, no BF-update, etc. */
802 update_request_performance_data (prq, pr);
803 GNUNET_LOAD_update (GSF_rt_entry_lifetime,
804 GNUNET_TIME_absolute_get_duration (pr->
805 public_data.start_time).rel_value);
806 /* pass on to other peers / local clients */
807 pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
808 prq->type, prq->data, prq->size);
810 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
811 GNUNET_STATISTICS_update (GSF_stats,
813 ("# duplicate replies discarded (bloomfilter)"),
816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
817 "Duplicate response `%s', discarding.\n", GNUNET_h2s (&mhash));
819 return GNUNET_YES; /* duplicate */
820 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
821 return GNUNET_YES; /* wrong namespace */
822 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
825 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
828 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
829 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Unsupported block type %u\n"),
833 /* update bloomfilter */
834 GNUNET_CRYPTO_hash (prq->data, prq->size, &chash);
835 GSF_pending_request_update_ (pr, &chash, 1);
836 if (NULL == prq->sender)
839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
840 "Found result for query `%s' in local datastore\n",
843 GNUNET_STATISTICS_update (GSF_stats,
844 gettext_noop ("# results found locally"), 1,
849 GSF_dht_lookup_ (pr);
851 prq->priority += pr->public_data.original_priority;
852 pr->public_data.priority = 0;
853 pr->public_data.original_priority = 0;
854 pr->public_data.results_found++;
855 prq->request_found = GNUNET_YES;
856 /* finally, pass on to other peer / local client */
857 pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
858 prq->type, prq->data, prq->size);
864 * Context for the 'put_migration_continuation'.
866 struct PutMigrationContext
870 * Start time for the operation.
872 struct GNUNET_TIME_Absolute start;
877 struct GNUNET_PeerIdentity origin;
880 * GNUNET_YES if we had a matching request for this block,
888 * Continuation called to notify client about result of the
892 * @param success GNUNET_SYSERR on failure
893 * @param min_expiration minimum expiration time required for content to be stored
894 * @param msg NULL on success, otherwise an error message
897 put_migration_continuation (void *cls, int success,
898 struct GNUNET_TIME_Absolute min_expiration,
901 struct PutMigrationContext *pmc = cls;
902 struct GSF_ConnectedPeer *cp;
904 cp = GSF_peer_get_ (&pmc->origin);
905 if ((GNUNET_OK != success) && (GNUNET_NO == pmc->requested) && (min_expiration.abs_value > 0)&&
907 GSF_block_peer_migration_ (cp, min_expiration);
909 /* on failure, increase the put load dramatically */
910 if (NULL != datastore_put_load)
911 GNUNET_LOAD_update (datastore_put_load,
912 GNUNET_TIME_UNIT_HOURS.rel_value);
913 if (GNUNET_OK == success)
915 GNUNET_STATISTICS_update (GSF_stats,
916 gettext_noop ("# Datastore `PUT' failures"), 1,
922 * Test if the DATABASE (PUT) load on this peer is too high
923 * to even consider processing the query at
926 * @return GNUNET_YES if the load is too high to do anything (load high)
927 * GNUNET_NO to process normally (load normal or low)
930 test_put_load_too_high (uint32_t priority)
934 if (NULL == datastore_put_load)
936 if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
937 return GNUNET_NO; /* very fast */
938 ld = GNUNET_LOAD_get_load (datastore_put_load);
939 if (ld < 2.0 * (1 + priority))
941 GNUNET_STATISTICS_update (GSF_stats,
943 ("# storage requests dropped due to high load"), 1,
950 * Iterator called on each result obtained for a DHT
951 * operation that expects a reply
954 * @param exp when will this value expire
955 * @param key key of the result
956 * @param get_path peers on reply path (or NULL if not recorded)
957 * @param get_path_length number of entries in get_path
958 * @param put_path peers on the PUT path (or NULL if not recorded)
959 * @param put_path_length number of entries in get_path
960 * @param type type of the result
961 * @param size number of bytes in data
962 * @param data pointer to the result data
965 handle_dht_reply (void *cls, struct GNUNET_TIME_Absolute exp,
966 const GNUNET_HashCode * key,
967 const struct GNUNET_PeerIdentity *get_path,
968 unsigned int get_path_length,
969 const struct GNUNET_PeerIdentity *put_path,
970 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
971 size_t size, const void *data)
973 struct GSF_PendingRequest *pr = cls;
974 struct ProcessReplyClosure prq;
975 struct PutMigrationContext *pmc;
977 GNUNET_STATISTICS_update (GSF_stats,
978 gettext_noop ("# Replies received from DHT"), 1,
980 memset (&prq, 0, sizeof (prq));
982 prq.expiration = exp;
983 /* do not allow migrated content to live longer than 1 year */
984 prq.expiration = GNUNET_TIME_absolute_min (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_YEARS),
988 process_reply (&prq, key, pr);
989 if ((GNUNET_YES == active_to_migration) &&
990 (GNUNET_NO == test_put_load_too_high (prq.priority)))
993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
994 "Replicating result for query `%s' with priority %u\n",
995 GNUNET_h2s (key), prq.priority);
997 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
998 pmc->start = GNUNET_TIME_absolute_get ();
999 pmc->requested = GNUNET_YES;
1001 GNUNET_DATASTORE_put (GSF_dsh, 0, key, size, data, type, prq.priority,
1003 0 /* replication */ ,
1004 exp, 1 + prq.priority, MAX_DATASTORE_QUEUE,
1005 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1006 &put_migration_continuation, pmc))
1008 put_migration_continuation (pmc, GNUNET_NO, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
1015 * Consider looking up the data in the DHT (anonymity-level permitting).
1017 * @param pr the pending request to process
1020 GSF_dht_lookup_ (struct GSF_PendingRequest *pr)
1024 struct GNUNET_PeerIdentity pi;
1025 char buf[sizeof (GNUNET_HashCode) * 2];
1027 if (0 != pr->public_data.anonymity_level)
1031 GNUNET_DHT_get_stop (pr->gh);
1036 if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
1039 memcpy (buf, &pr->public_data.namespace, sizeof (GNUNET_HashCode));
1040 xquery_size = sizeof (GNUNET_HashCode);
1042 if (0 != (pr->public_data.options & GSF_PRO_FORWARD_ONLY))
1044 GNUNET_assert (0 != pr->sender_pid);
1045 GNUNET_PEER_resolve (pr->sender_pid, &pi);
1046 memcpy (&buf[xquery_size], &pi, sizeof (struct GNUNET_PeerIdentity));
1047 xquery_size += sizeof (struct GNUNET_PeerIdentity);
1050 GNUNET_DHT_get_start (GSF_dht, GNUNET_TIME_UNIT_FOREVER_REL,
1051 pr->public_data.type, &pr->public_data.query,
1052 5 /* DEFAULT_GET_REPLICATION */ ,
1053 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1054 /* FIXME: can no longer pass pr->bf/pr->mingle... */
1055 xquery, xquery_size, &handle_dht_reply, pr);
1060 * Task that issues a warning if the datastore lookup takes too long.
1062 * @param cls the 'struct GSF_PendingRequest'
1063 * @param tc task context
1066 warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1068 struct GSF_PendingRequest *pr = cls;
1070 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1071 _("Datastore lookup already took %llu ms!\n"),
1072 (unsigned long long)
1073 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1075 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1081 * Task that issues a warning if the datastore lookup takes too long.
1083 * @param cls the 'struct GSF_PendingRequest'
1084 * @param tc task context
1087 odc_warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1089 struct GSF_PendingRequest *pr = cls;
1091 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1092 _("On-demand lookup already took %llu ms!\n"),
1093 (unsigned long long)
1094 GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
1096 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1097 &odc_warn_delay_task, pr);
1102 * We're processing (local) results for a search request
1103 * from another peer. Pass applicable results to the
1104 * peer and if we are done either clean up (operation
1105 * complete) or forward to other peers (more results possible).
1107 * @param cls our closure (struct PendingRequest)
1108 * @param key key for the content
1109 * @param size number of bytes in data
1110 * @param data content stored
1111 * @param type type of the content
1112 * @param priority priority of the content
1113 * @param anonymity anonymity-level for the content
1114 * @param expiration expiration time for the content
1115 * @param uid unique identifier for the datum;
1116 * maybe 0 if no unique identifier is available
1119 process_local_reply (void *cls, const GNUNET_HashCode * key, size_t size,
1120 const void *data, enum GNUNET_BLOCK_Type type,
1121 uint32_t priority, uint32_t anonymity,
1122 struct GNUNET_TIME_Absolute expiration, uint64_t uid)
1124 struct GSF_PendingRequest *pr = cls;
1125 GSF_LocalLookupContinuation cont;
1126 struct ProcessReplyClosure prq;
1127 GNUNET_HashCode query;
1128 unsigned int old_rf;
1130 GNUNET_SCHEDULER_cancel (pr->warn_task);
1131 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1137 GNUNET_STATISTICS_update (GSF_stats,
1139 ("# Datastore lookups concluded (no results)"),
1142 if (GNUNET_NO == pr->have_first_uid)
1144 pr->first_uid = uid;
1145 pr->have_first_uid = 1;
1149 if ((uid == pr->first_uid) && (key != NULL))
1151 GNUNET_STATISTICS_update (GSF_stats,
1153 ("# Datastore lookups concluded (seen all)"),
1155 key = NULL; /* all replies seen! */
1157 pr->have_first_uid++;
1158 if ((pr->have_first_uid > MAX_RESULTS) && (key != NULL))
1160 GNUNET_STATISTICS_update (GSF_stats,
1162 ("# Datastore lookups aborted (more than MAX_RESULTS)"),
1164 key = NULL; /* all replies seen! */
1171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1172 "No further local responses available.\n");
1174 if ((pr->public_data.type == GNUNET_BLOCK_TYPE_FS_DBLOCK) ||
1175 (pr->public_data.type == GNUNET_BLOCK_TYPE_FS_IBLOCK))
1176 GNUNET_STATISTICS_update (GSF_stats,
1178 ("# requested DBLOCK or IBLOCK not found"), 1,
1180 goto check_error_and_continue;
1183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1184 "Received reply for `%s' of type %d with UID %llu from datastore.\n",
1185 GNUNET_h2s (key), type, (unsigned long long) uid);
1187 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1191 "Found ONDEMAND block, performing on-demand encoding\n");
1193 GNUNET_STATISTICS_update (GSF_stats,
1195 ("# on-demand blocks matched requests"), 1,
1197 pr->qe_start = GNUNET_TIME_absolute_get ();
1199 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1200 &odc_warn_delay_task, pr);
1202 GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
1203 anonymity, expiration, uid,
1204 &process_local_reply, pr))
1206 GNUNET_STATISTICS_update (GSF_stats,
1208 ("# on-demand lookups performed successfully"),
1210 return; /* we're done */
1212 GNUNET_STATISTICS_update (GSF_stats,
1213 gettext_noop ("# on-demand lookups failed"), 1,
1215 GNUNET_SCHEDULER_cancel (pr->warn_task);
1217 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1218 &warn_delay_task, pr);
1220 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
1221 &pr->public_data.query,
1222 pr->public_data.type ==
1223 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1224 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1226 (GSF_PRO_PRIORITY_UNLIMITED &
1227 pr->public_data.options)) ? UINT_MAX : 1
1228 /* queue priority */ ,
1230 (GSF_PRO_PRIORITY_UNLIMITED &
1231 pr->public_data.options)) ? UINT_MAX :
1232 datastore_queue_size
1233 /* max queue size */ ,
1234 GNUNET_TIME_UNIT_FOREVER_REL,
1235 &process_local_reply, pr);
1237 return; /* we're done */
1238 GNUNET_STATISTICS_update (GSF_stats,
1240 ("# Datastore lookups concluded (error queueing)"),
1242 goto check_error_and_continue;
1244 old_rf = pr->public_data.results_found;
1245 memset (&prq, 0, sizeof (prq));
1247 prq.expiration = expiration;
1250 GNUNET_BLOCK_get_key (GSF_block_ctx, type, data, size, &query))
1253 GNUNET_DATASTORE_remove (GSF_dsh, key, size, data, -1, -1,
1254 GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
1255 pr->qe_start = GNUNET_TIME_absolute_get ();
1257 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
1258 &warn_delay_task, pr);
1260 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
1261 &pr->public_data.query,
1262 pr->public_data.type ==
1263 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1264 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1266 (GSF_PRO_PRIORITY_UNLIMITED &
1267 pr->public_data.options)) ? UINT_MAX : 1
1268 /* queue priority */ ,
1270 (GSF_PRO_PRIORITY_UNLIMITED &
1271 pr->public_data.options)) ? UINT_MAX :
1272 datastore_queue_size
1273 /* max queue size */ ,
1274 GNUNET_TIME_UNIT_FOREVER_REL,
1275 &process_local_reply, pr);
1278 GNUNET_STATISTICS_update (GSF_stats,
1280 ("# Datastore lookups concluded (error queueing)"),
1282 goto check_error_and_continue;
1287 prq.priority = priority;
1288 prq.request_found = GNUNET_NO;
1289 prq.anonymity_level = anonymity;
1290 if ((old_rf == 0) && (pr->public_data.results_found == 0))
1291 GSF_update_datastore_delay_ (pr->public_data.start_time);
1292 process_reply (&prq, key, pr);
1293 pr->local_result = prq.eval;
1294 if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
1296 GNUNET_STATISTICS_update (GSF_stats,
1298 ("# Datastore lookups concluded (found last result)"),
1300 goto check_error_and_continue;
1302 if ((0 == (GSF_PRO_PRIORITY_UNLIMITED & pr->public_data.options)) &&
1303 ((GNUNET_YES == GSF_test_get_load_too_high_ (0)) ||
1304 (pr->public_data.results_found > 5 + 2 * pr->public_data.priority)))
1307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load too high, done with request\n");
1309 GNUNET_STATISTICS_update (GSF_stats,
1311 ("# Datastore lookups concluded (load too high)"),
1313 goto check_error_and_continue;
1315 pr->qe_start = GNUNET_TIME_absolute_get ();
1317 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1320 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
1321 &pr->public_data.query,
1322 pr->public_data.type ==
1323 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1324 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1326 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1327 public_data.options)) ? UINT_MAX : 1
1328 /* queue priority */ ,
1330 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1331 public_data.options)) ? UINT_MAX :
1332 datastore_queue_size
1333 /* max queue size */ ,
1334 GNUNET_TIME_UNIT_FOREVER_REL,
1335 &process_local_reply, pr);
1336 /* check if we successfully queued another datastore request;
1337 * if so, return, otherwise call our continuation (if we have
1339 check_error_and_continue:
1342 if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
1344 GNUNET_SCHEDULER_cancel (pr->warn_task);
1345 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1347 if (NULL == (cont = pr->llc_cont))
1348 return; /* no continuation */
1349 pr->llc_cont = NULL;
1350 cont (pr->llc_cont_cls, pr, pr->local_result);
1355 * Is the given target a legitimate peer for forwarding the given request?
1359 * @return GNUNET_YES if this request could be forwarded to the given peer
1362 GSF_pending_request_test_target_ (struct GSF_PendingRequest *pr,
1363 const struct GNUNET_PeerIdentity *target)
1365 struct GNUNET_PeerIdentity pi;
1367 if (0 == pr->origin_pid)
1369 GNUNET_PEER_resolve (pr->origin_pid, &pi);
1371 memcmp (&pi, target,
1372 sizeof (struct GNUNET_PeerIdentity))) ? GNUNET_NO :
1378 * Look up the request in the local datastore.
1380 * @param pr the pending request to process
1381 * @param cont function to call at the end
1382 * @param cont_cls closure for cont
1385 GSF_local_lookup_ (struct GSF_PendingRequest *pr,
1386 GSF_LocalLookupContinuation cont, void *cont_cls)
1388 GNUNET_assert (NULL == pr->gh);
1389 GNUNET_assert (NULL == pr->llc_cont);
1390 pr->llc_cont = cont;
1391 pr->llc_cont_cls = cont_cls;
1392 pr->qe_start = GNUNET_TIME_absolute_get ();
1394 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
1396 GNUNET_STATISTICS_update (GSF_stats,
1397 gettext_noop ("# Datastore lookups initiated"), 1,
1400 GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
1401 &pr->public_data.query,
1402 pr->public_data.type ==
1403 GNUNET_BLOCK_TYPE_FS_DBLOCK ?
1404 GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
1406 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1407 public_data.options)) ? UINT_MAX : 1
1408 /* queue priority */ ,
1410 (GSF_PRO_PRIORITY_UNLIMITED & pr->
1411 public_data.options)) ? UINT_MAX :
1412 datastore_queue_size
1413 /* max queue size */ ,
1414 GNUNET_TIME_UNIT_FOREVER_REL,
1415 &process_local_reply, pr);
1418 GNUNET_STATISTICS_update (GSF_stats,
1420 ("# Datastore lookups concluded (error queueing)"),
1422 GNUNET_SCHEDULER_cancel (pr->warn_task);
1423 pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
1424 pr->llc_cont = NULL;
1426 cont (cont_cls, pr, pr->local_result);
1432 * Handle P2P "CONTENT" message. Checks that the message is
1433 * well-formed and then checks if there are any pending requests for
1434 * this content and possibly passes it on (to local clients or other
1435 * peers). Does NOT perform migration (content caching at this peer).
1437 * @param cp the other peer involved (sender or receiver, NULL
1438 * for loopback messages where we are both sender and receiver)
1439 * @param message the actual message
1440 * @return GNUNET_OK if the message was well-formed,
1441 * GNUNET_SYSERR if the message was malformed (close connection,
1442 * do not cache under any circumstances)
1445 GSF_handle_p2p_content_ (struct GSF_ConnectedPeer *cp,
1446 const struct GNUNET_MessageHeader *message)
1448 const struct PutMessage *put;
1451 enum GNUNET_BLOCK_Type type;
1452 struct GNUNET_TIME_Absolute expiration;
1453 GNUNET_HashCode query;
1454 struct ProcessReplyClosure prq;
1455 struct GNUNET_TIME_Relative block_time;
1457 struct PutMigrationContext *pmc;
1459 msize = ntohs (message->size);
1460 if (msize < sizeof (struct PutMessage))
1462 GNUNET_break_op (0);
1463 return GNUNET_SYSERR;
1465 put = (const struct PutMessage *) message;
1466 dsize = msize - sizeof (struct PutMessage);
1467 type = ntohl (put->type);
1468 expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
1469 /* do not allow migrated content to live longer than 1 year */
1470 expiration = GNUNET_TIME_absolute_min (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_YEARS),
1472 if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
1473 return GNUNET_SYSERR;
1475 GNUNET_BLOCK_get_key (GSF_block_ctx, type, &put[1], dsize, &query))
1477 GNUNET_break_op (0);
1478 return GNUNET_SYSERR;
1480 GNUNET_STATISTICS_update (GSF_stats,
1481 gettext_noop ("# GAP PUT messages received"), 1,
1483 /* now, lookup 'query' */
1484 prq.data = (const void *) &put[1];
1491 prq.expiration = expiration;
1493 prq.anonymity_level = UINT32_MAX;
1494 prq.request_found = GNUNET_NO;
1495 GNUNET_CONTAINER_multihashmap_get_multiple (pr_map, &query, &process_reply,
1499 GSF_connected_peer_change_preference_ (cp,
1500 CONTENT_BANDWIDTH_VALUE +
1501 1000 * prq.priority);
1502 GSF_get_peer_performance_data_ (cp)->trust += prq.priority;
1504 if ((GNUNET_YES == active_to_migration) &&
1505 (GNUNET_NO == test_put_load_too_high (prq.priority)))
1508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1509 "Replicating result for query `%s' with priority %u\n",
1510 GNUNET_h2s (&query), prq.priority);
1512 pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
1513 pmc->start = GNUNET_TIME_absolute_get ();
1514 pmc->requested = prq.request_found;
1515 GNUNET_assert (0 != GSF_get_peer_performance_data_ (cp)->pid);
1516 GNUNET_PEER_resolve (GSF_get_peer_performance_data_ (cp)->pid,
1519 GNUNET_DATASTORE_put (GSF_dsh, 0, &query, dsize, &put[1], type,
1520 prq.priority, 1 /* anonymity */ ,
1521 0 /* replication */ ,
1522 expiration, 1 + prq.priority, MAX_DATASTORE_QUEUE,
1523 GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1524 &put_migration_continuation, pmc))
1526 put_migration_continuation (pmc, GNUNET_NO, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
1532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1533 "Choosing not to keep content `%s' (%d/%d)\n",
1534 GNUNET_h2s (&query), active_to_migration,
1535 test_put_load_too_high (prq.priority));
1538 putl = GNUNET_LOAD_get_load (datastore_put_load);
1539 if ((NULL != (cp = prq.sender)) && (GNUNET_NO == prq.request_found) &&
1540 ((GNUNET_YES != active_to_migration) ||
1541 (putl > 2.5 * (1 + prq.priority))))
1543 if (GNUNET_YES != active_to_migration)
1544 putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
1546 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1548 GNUNET_CRYPTO_random_u32
1549 (GNUNET_CRYPTO_QUALITY_WEAK,
1550 (unsigned int) (60000 * putl * putl)));
1551 GSF_block_peer_migration_ (cp, GNUNET_TIME_relative_to_absolute (block_time));
1558 * Setup the subsystem.
1561 GSF_pending_request_init_ ()
1563 unsigned long long bps;
1566 GNUNET_CONFIGURATION_get_value_number (GSF_cfg, "fs",
1567 "MAX_PENDING_REQUESTS",
1568 &max_pending_requests))
1570 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1572 ("Configuration fails to specify `%s', assuming default value."),
1573 "MAX_PENDING_REQUESTS");
1576 GNUNET_CONFIGURATION_get_value_size (GSF_cfg, "ats", "WAN_QUOTA_OUT",
1579 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1581 ("Configuration fails to specify `%s', assuming default value."),
1585 /* queue size should be #queries we can have pending and satisfy within
1586 * a carry interval: */
1587 datastore_queue_size =
1588 bps * GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S / DBLOCK_SIZE;
1590 active_to_migration =
1591 GNUNET_CONFIGURATION_get_value_yesno (GSF_cfg, "FS", "CONTENT_CACHING");
1592 datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
1593 pr_map = GNUNET_CONTAINER_multihashmap_create (32 * 1024);
1594 requests_by_expiration_heap =
1595 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1600 * Shutdown the subsystem.
1603 GSF_pending_request_done_ ()
1605 GNUNET_CONTAINER_multihashmap_iterate (pr_map, &clean_request, NULL);
1606 GNUNET_CONTAINER_multihashmap_destroy (pr_map);
1608 GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
1609 requests_by_expiration_heap = NULL;
1610 GNUNET_LOAD_value_free (datastore_put_load);
1611 datastore_put_load = NULL;
1615 /* end of gnunet-service-fs_pr.c */