* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet_load_lib.h"
+#include "gnunet-service-fs.h"
+#include "gnunet-service-fs_cp.h"
+#include "gnunet-service-fs_indexing.h"
+#include "gnunet-service-fs_pe.h"
#include "gnunet-service-fs_pr.h"
+/**
+ * Maximum size of the datastore queue for P2P operations. Needs to
+ * be large enough to queue MAX_QUEUE_PER_PEER operations for roughly
+ * the number of active (connected) peers.
+ */
+#define MAX_DATASTORE_QUEUE (16 * MAX_QUEUE_PER_PEER)
+
+/**
+ * Bandwidth value of a 0-priority content (must be fairly high
+ * compared to query since content is typically significantly larger
+ * -- and more valueable since it can take many queries to get one
+ * piece of content).
+ */
+#define CONTENT_BANDWIDTH_VALUE 800
+
+/**
+ * Hard limit on the number of results we may get from the datastore per query.
+ */
+#define MAX_RESULTS (100 * 1024)
+
+/**
+ * An active request.
+ */
+struct GSF_PendingRequest
+{
+ /**
+ * Public data for the request.
+ */
+ struct GSF_PendingRequestData public_data;
+
+ /**
+ * Function to call if we encounter a reply.
+ */
+ GSF_PendingRequestReplyHandler rh;
+
+ /**
+ * Closure for 'rh'
+ */
+ void *rh_cls;
+
+ /**
+ * Array of hash codes of replies we've already seen.
+ */
+ GNUNET_HashCode *replies_seen;
+
+ /**
+ * Bloomfilter masking replies we've already seen.
+ */
+ struct GNUNET_CONTAINER_BloomFilter *bf;
+
+ /**
+ * Entry for this pending request in the expiration heap, or NULL.
+ */
+ struct GNUNET_CONTAINER_HeapNode *hnode;
+
+ /**
+ * Datastore queue entry for this request (or NULL for none).
+ */
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+
+ /**
+ * DHT request handle for this request (or NULL for none).
+ */
+ struct GNUNET_DHT_GetHandle *gh;
+
+ /**
+ * Function to call upon completion of the local get
+ * request, or NULL for none.
+ */
+ GSF_LocalLookupContinuation llc_cont;
+
+ /**
+ * Closure for llc_cont.
+ */
+ void *llc_cont_cls;
+
+ /**
+ * Last result from the local datastore lookup evaluation.
+ */
+ enum GNUNET_BLOCK_EvaluationResult local_result;
+
+ /**
+ * Identity of the peer that we should use for the 'sender'
+ * (recipient of the response) when forwarding (0 for none).
+ */
+ GNUNET_PEER_Id sender_pid;
+
+ /**
+ * Identity of the peer that we should never forward this query
+ * to since it originated this query (0 for none).
+ */
+ GNUNET_PEER_Id origin_pid;
+
+ /**
+ * Time we started the last datastore lookup.
+ */
+ struct GNUNET_TIME_Absolute qe_start;
+
+ /**
+ * Task that warns us if the local datastore lookup takes too long.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier warn_task;
+
+ /**
+ * Current offset for querying our local datastore for results.
+ * Starts at a random value, incremented until we get the same
+ * UID again (detected using 'first_uid'), which is then used
+ * to termiante the iteration.
+ */
+ uint64_t local_result_offset;
+
+ /**
+ * Unique ID of the first result from the local datastore;
+ * used to detect wrap-around of the offset.
+ */
+ uint64_t first_uid;
+
+ /**
+ * Number of valid entries in the 'replies_seen' array.
+ */
+ unsigned int replies_seen_count;
+
+ /**
+ * Length of the 'replies_seen' array.
+ */
+ unsigned int replies_seen_size;
+
+ /**
+ * Mingle value we currently use for the bf.
+ */
+ uint32_t mingle;
+
+ /**
+ * Do we have a first UID yet?
+ */
+ unsigned int have_first_uid;
+
+};
+
+
+/**
+ * All pending requests, ordered by the query. Entries
+ * are of type 'struct GSF_PendingRequest*'.
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *pr_map;
+
+
+/**
+ * Datastore 'PUT' load tracking.
+ */
+static struct GNUNET_LOAD_Value *datastore_put_load;
+
+
+/**
+ * Are we allowed to migrate content to this peer.
+ */
+static int active_to_migration;
+
+
+/**
+ * Size of the datastore queue we assume for common requests.
+ * Determined based on the network quota.
+ */
+static unsigned int datastore_queue_size;
+
+/**
+ * Heap with the request that will expire next at the top. Contains
+ * pointers of type "struct PendingRequest*"; these will *also* be
+ * aliased from the "requests_by_peer" data structures and the
+ * "requests_by_query" table. Note that requests from our clients
+ * don't expire and are thus NOT in the "requests_by_expiration"
+ * (or the "requests_by_peer" tables).
+ */
+static struct GNUNET_CONTAINER_Heap *requests_by_expiration_heap;
+
/**
- * Create a new pending request.
+ * Maximum number of requests (from other peers, overall) that we're
+ * willing to have pending at any given point in time. Can be changed
+ * via the configuration file (32k is just the default).
+ */
+static unsigned long long max_pending_requests = (32 * 1024);
+
+
+
+/**
+ * Recalculate our bloom filter for filtering replies. This function
+ * will create a new bloom filter from scratch, so it should only be
+ * called if we have no bloomfilter at all (and hence can create a
+ * fresh one of minimal size without problems) OR if our peer is the
+ * initiator (in which case we may resize to larger than mimimum size).
+ *
+ * @param pr request for which the BF is to be recomputed
+ */
+static void
+refresh_bloomfilter (struct GSF_PendingRequest *pr)
+{
+ if (pr->bf != NULL)
+ GNUNET_CONTAINER_bloomfilter_free (pr->bf);
+ pr->mingle =
+ GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
+ pr->bf =
+ GNUNET_BLOCK_construct_bloomfilter (pr->mingle, pr->replies_seen,
+ pr->replies_seen_count);
+}
+
+
+/**
+ * Create a new pending request.
*
* @param options request options
* @param type type of the block that is being requested
* @param query key for the lookup
* @param namespace namespace to lookup, NULL for no namespace
* @param target preferred target for the request, NULL for none
- * @param bf bloom filter for known replies, can be NULL
+ * @param bf_data raw data for bloom filter for known replies, can be NULL
+ * @param bf_size number of bytes in bf_data
* @param mingle mingle value for bf
* @param anonymity_level desired anonymity level
* @param priority maximum outgoing cummulative request priority to use
+ * @param ttl current time-to-live for the request
+ * @param sender_pid peer ID to use for the sender when forwarding, 0 for none
+ * @param origin_pid peer ID of origin of query (do not loop back)
* @param replies_seen hash codes of known local replies
* @param replies_seen_count size of the 'replies_seen' array
* @param rh handle to call when we get a reply
*/
struct GSF_PendingRequest *
GSF_pending_request_create_ (enum GSF_PendingRequestOptions options,
- enum GNUNET_BLOCK_Type type,
- const GNUNET_HashCode *query,
- const GNUNET_HashCode *namespace,
- const struct GNUNET_PeerIdentity *target,
- struct GNUNET_CONTAINER_BloomFilter *bf,
- int32_t mingle,
- uint32_t anonymity_level,
- uint32_t priority,
- const GNUNET_HashCode *replies_seen,
- unsigned int replies_seen_count,
- GSF_PendingRequestReplyHandler rh,
- void *rh_cls)
+ enum GNUNET_BLOCK_Type type,
+ const GNUNET_HashCode * query,
+ const GNUNET_HashCode * namespace,
+ const struct GNUNET_PeerIdentity *target,
+ const char *bf_data, size_t bf_size,
+ uint32_t mingle, uint32_t anonymity_level,
+ uint32_t priority, int32_t ttl,
+ GNUNET_PEER_Id sender_pid,
+ GNUNET_PEER_Id origin_pid,
+ const GNUNET_HashCode * replies_seen,
+ unsigned int replies_seen_count,
+ GSF_PendingRequestReplyHandler rh, void *rh_cls)
{
- return NULL; // FIXME
-}
+ struct GSF_PendingRequest *pr;
+ struct GSF_PendingRequest *dpr;
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating request handle for `%s' of type %d\n",
+ GNUNET_h2s (query), type);
+#endif
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Pending requests created"), 1,
+ GNUNET_NO);
+ pr = GNUNET_malloc (sizeof (struct GSF_PendingRequest));
+ pr->local_result_offset =
+ GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
+ pr->public_data.query = *query;
+ if (GNUNET_BLOCK_TYPE_FS_SBLOCK == type)
+ {
+ GNUNET_assert (NULL != namespace);
+ pr->public_data.namespace = *namespace;
+ }
+ if (NULL != target)
+ {
+ pr->public_data.target = *target;
+ pr->public_data.has_target = GNUNET_YES;
+ }
+ pr->public_data.anonymity_level = anonymity_level;
+ pr->public_data.priority = priority;
+ pr->public_data.original_priority = priority;
+ pr->public_data.options = options;
+ pr->public_data.type = type;
+ pr->public_data.start_time = GNUNET_TIME_absolute_get ();
+ pr->sender_pid = sender_pid;
+ pr->origin_pid = origin_pid;
+ pr->rh = rh;
+ pr->rh_cls = rh_cls;
+ GNUNET_assert ((sender_pid != 0) || (0 == (options & GSF_PRO_FORWARD_ONLY)));
+ if (ttl >= 0)
+ pr->public_data.ttl =
+ GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS,
+ (uint32_t) ttl));
+ else
+ pr->public_data.ttl =
+ GNUNET_TIME_absolute_subtract (pr->public_data.start_time,
+ GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_SECONDS,
+ (uint32_t) (-ttl)));
+ if (replies_seen_count > 0)
+ {
+ pr->replies_seen_size = replies_seen_count;
+ pr->replies_seen =
+ GNUNET_malloc (sizeof (GNUNET_HashCode) * pr->replies_seen_size);
+ memcpy (pr->replies_seen, replies_seen,
+ replies_seen_count * sizeof (GNUNET_HashCode));
+ pr->replies_seen_count = replies_seen_count;
+ }
+ if (NULL != bf_data)
+ {
+ pr->bf =
+ GNUNET_CONTAINER_bloomfilter_init (bf_data, bf_size,
+ GNUNET_CONSTANTS_BLOOMFILTER_K);
+ pr->mingle = mingle;
+ }
+ else if ((replies_seen_count > 0) &&
+ (0 != (options & GSF_PRO_BLOOMFILTER_FULL_REFRESH)))
+ {
+ refresh_bloomfilter (pr);
+ }
+ GNUNET_CONTAINER_multihashmap_put (pr_map, query, pr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ if (0 == (options & GSF_PRO_REQUEST_NEVER_EXPIRES))
+ {
+ pr->hnode =
+ GNUNET_CONTAINER_heap_insert (requests_by_expiration_heap, pr,
+ pr->public_data.ttl.abs_value);
+ /* make sure we don't track too many requests */
+ while (GNUNET_CONTAINER_heap_get_size (requests_by_expiration_heap) >
+ max_pending_requests)
+ {
+ dpr = GNUNET_CONTAINER_heap_peek (requests_by_expiration_heap);
+ GNUNET_assert (dpr != NULL);
+ if (pr == dpr)
+ break; /* let the request live briefly... */
+ if (NULL != dpr->rh)
+ dpr->rh (dpr->rh_cls, GNUNET_BLOCK_EVALUATION_REQUEST_VALID, dpr,
+ UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_ABS,
+ GNUNET_BLOCK_TYPE_ANY, NULL, 0);
+ GSF_pending_request_cancel_ (dpr, GNUNET_YES);
+ }
+ }
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Pending requests active"), 1,
+ GNUNET_NO);
+ return pr;
+}
/**
- * Update a given pending request with additional replies
- * that have been seen.
+ * Obtain the public data associated with a pending request
*
- * @param pr request to update
- * @param replies_seen hash codes of replies that we've seen
- * @param replies_seen_count size of the replies_seen array
+ * @param pr pending request
+ * @return associated public data
*/
-void
-GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
- const GNUNET_HashCode *replies_seen,
- unsigned int replies_seen_count)
+struct GSF_PendingRequestData *
+GSF_pending_request_get_data_ (struct GSF_PendingRequest *pr)
{
- // FIXME
+ return &pr->public_data;
}
-
/**
- * Get the query for a given pending request.
+ * Test if two pending requests are compatible (would generate
+ * the same query modulo filters and should thus be processed
+ * jointly).
*
- * @param pr the request
- * @return pointer to the query (only valid as long as pr is valid)
+ * @param pra a pending request
+ * @param prb another pending request
+ * @return GNUNET_OK if the requests are compatible
*/
-const GNUNET_HashCode *
-GSF_pending_request_get_query_ (const struct GSF_PendingRequest *pr)
+int
+GSF_pending_request_is_compatible_ (struct GSF_PendingRequest *pra,
+ struct GSF_PendingRequest *prb)
{
- return NULL; // FIXME
+ if ((pra->public_data.type != prb->public_data.type) ||
+ (0 !=
+ memcmp (&pra->public_data.query, &prb->public_data.query,
+ sizeof (GNUNET_HashCode))) ||
+ ((pra->public_data.type == GNUNET_BLOCK_TYPE_FS_SBLOCK) &&
+ (0 !=
+ memcmp (&pra->public_data.namespace, &prb->public_data.namespace,
+ sizeof (GNUNET_HashCode)))))
+ return GNUNET_NO;
+ return GNUNET_OK;
}
+
/**
- * Get the type of a given pending request.
+ * Update a given pending request with additional replies
+ * that have been seen.
*
- * @param pr the request
- * @return query type
+ * @param pr request to update
+ * @param replies_seen hash codes of replies that we've seen
+ * @param replies_seen_count size of the replies_seen array
*/
-enum GNUNET_BLOCK_Type
-GSF_pending_request_get_type_ (const struct GSF_PendingRequest *pr)
+void
+GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
+ const GNUNET_HashCode * replies_seen,
+ unsigned int replies_seen_count)
{
- return 0; // FIXME
+ unsigned int i;
+ GNUNET_HashCode mhash;
+
+ if (replies_seen_count + pr->replies_seen_count < pr->replies_seen_count)
+ return; /* integer overflow */
+ if (0 != (pr->public_data.options & GSF_PRO_BLOOMFILTER_FULL_REFRESH))
+ {
+ /* we're responsible for the BF, full refresh */
+ if (replies_seen_count + pr->replies_seen_count > pr->replies_seen_size)
+ GNUNET_array_grow (pr->replies_seen, pr->replies_seen_size,
+ replies_seen_count + pr->replies_seen_count);
+ memcpy (&pr->replies_seen[pr->replies_seen_count], replies_seen,
+ sizeof (GNUNET_HashCode) * replies_seen_count);
+ pr->replies_seen_count += replies_seen_count;
+ refresh_bloomfilter (pr);
+ }
+ else
+ {
+ if (NULL == pr->bf)
+ {
+ /* we're not the initiator, but the initiator did not give us
+ * any bloom-filter, so we need to create one on-the-fly */
+ pr->mingle =
+ GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX);
+ pr->bf =
+ GNUNET_BLOCK_construct_bloomfilter (pr->mingle, replies_seen,
+ replies_seen_count);
+ }
+ else
+ {
+ for (i = 0; i < pr->replies_seen_count; i++)
+ {
+ GNUNET_BLOCK_mingle_hash (&replies_seen[i], pr->mingle, &mhash);
+ GNUNET_CONTAINER_bloomfilter_add (pr->bf, &mhash);
+ }
+ }
+ }
}
*/
size_t
GSF_pending_request_get_message_ (struct GSF_PendingRequest *pr,
- size_t buf_size,
- void *buf)
+ size_t buf_size, void *buf)
+{
+ char lbuf[GNUNET_SERVER_MAX_MESSAGE_SIZE];
+ struct GetMessage *gm;
+ GNUNET_HashCode *ext;
+ size_t msize;
+ unsigned int k;
+ uint32_t bm;
+ uint32_t prio;
+ size_t bf_size;
+ struct GNUNET_TIME_Absolute now;
+ int64_t ttl;
+ int do_route;
+
+#if DEBUG_FS
+ if (buf_size > 0)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Building request message for `%s' of type %d\n",
+ GNUNET_h2s (&pr->public_data.query), pr->public_data.type);
+#endif
+ k = 0;
+ bm = 0;
+ do_route = (0 == (pr->public_data.options & GSF_PRO_FORWARD_ONLY));
+ if ((!do_route) && (pr->sender_pid == 0))
+ {
+ GNUNET_break (0);
+ do_route = GNUNET_YES;
+ }
+ if (!do_route)
+ {
+ bm |= GET_MESSAGE_BIT_RETURN_TO;
+ k++;
+ }
+ if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
+ {
+ bm |= GET_MESSAGE_BIT_SKS_NAMESPACE;
+ k++;
+ }
+ if (GNUNET_YES == pr->public_data.has_target)
+ {
+ bm |= GET_MESSAGE_BIT_TRANSMIT_TO;
+ k++;
+ }
+ bf_size = GNUNET_CONTAINER_bloomfilter_get_size (pr->bf);
+ msize = sizeof (struct GetMessage) + bf_size + k * sizeof (GNUNET_HashCode);
+ GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ if (buf_size < msize)
+ return msize;
+ gm = (struct GetMessage *) lbuf;
+ gm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_GET);
+ gm->header.size = htons (msize);
+ gm->type = htonl (pr->public_data.type);
+ if (do_route)
+ prio =
+ GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ pr->public_data.priority + 1);
+ else
+ prio = 0;
+ pr->public_data.priority -= prio;
+ gm->priority = htonl (prio);
+ now = GNUNET_TIME_absolute_get ();
+ ttl = (int64_t) (pr->public_data.ttl.abs_value - now.abs_value);
+ gm->ttl = htonl (ttl / 1000);
+ gm->filter_mutator = htonl (pr->mingle);
+ gm->hash_bitmap = htonl (bm);
+ gm->query = pr->public_data.query;
+ ext = (GNUNET_HashCode *) & gm[1];
+ k = 0;
+ if (!do_route)
+ GNUNET_PEER_resolve (pr->sender_pid,
+ (struct GNUNET_PeerIdentity *) &ext[k++]);
+ if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
+ memcpy (&ext[k++], &pr->public_data.namespace, sizeof (GNUNET_HashCode));
+ if (GNUNET_YES == pr->public_data.has_target)
+ ext[k++] = pr->public_data.target.hashPubKey;
+ if (pr->bf != NULL)
+ GNUNET_assert (GNUNET_SYSERR !=
+ GNUNET_CONTAINER_bloomfilter_get_raw_data (pr->bf,
+ (char *) &ext[k],
+ bf_size));
+ memcpy (buf, gm, msize);
+ return msize;
+}
+
+
+/**
+ * Iterator to free pending requests.
+ *
+ * @param cls closure, unused
+ * @param key current key code
+ * @param value value in the hash map (pending request)
+ * @return GNUNET_YES (we should continue to iterate)
+ */
+static int
+clean_request (void *cls, const GNUNET_HashCode * key, void *value)
{
- return 0; // FIXME
+ struct GSF_PendingRequest *pr = value;
+ GSF_LocalLookupContinuation cont;
+
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Cleaning up pending request for `%s'.\n", GNUNET_h2s (key));
+#endif
+ if (NULL != (cont = pr->llc_cont))
+ {
+ pr->llc_cont = NULL;
+ cont (pr->llc_cont_cls, pr, pr->local_result);
+ }
+ GSF_plan_notify_request_done_ (pr);
+ GNUNET_free_non_null (pr->replies_seen);
+ if (NULL != pr->bf)
+ {
+ GNUNET_CONTAINER_bloomfilter_free (pr->bf);
+ pr->bf = NULL;
+ }
+ GNUNET_PEER_change_rc (pr->sender_pid, -1);
+ pr->sender_pid = 0;
+ GNUNET_PEER_change_rc (pr->origin_pid, -1);
+ pr->origin_pid = 0;
+ if (NULL != pr->hnode)
+ {
+ GNUNET_CONTAINER_heap_remove_node (pr->hnode);
+ pr->hnode = NULL;
+ }
+ if (NULL != pr->qe)
+ {
+ GNUNET_DATASTORE_cancel (pr->qe);
+ pr->qe = NULL;
+ }
+ if (NULL != pr->gh)
+ {
+ GNUNET_DHT_get_stop (pr->gh);
+ pr->gh = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
+ {
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_remove (pr_map,
+ &pr->public_data.query,
+ pr));
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Pending requests active"), -1,
+ GNUNET_NO);
+ GNUNET_free (pr);
+ return GNUNET_YES;
}
* Explicitly cancel a pending request.
*
* @param pr request to cancel
+ * @param full_cleanup fully purge the request
*/
void
-GSF_pending_request_cancel_ (struct GSF_PendingRequest *pr)
+GSF_pending_request_cancel_ (struct GSF_PendingRequest *pr, int full_cleanup)
{
+ GSF_LocalLookupContinuation cont;
+
+ if (NULL == pr_map)
+ return; /* already cleaned up! */
+ if (GNUNET_YES != full_cleanup)
+ {
+ /* make request inactive (we're no longer interested in more results),
+ * but do NOT remove from our data-structures, we still need it there
+ * to prevent the request from looping */
+ pr->rh = NULL;
+ if (NULL != (cont = pr->llc_cont))
+ {
+ pr->llc_cont = NULL;
+ cont (pr->llc_cont_cls, pr, pr->local_result);
+ }
+ GSF_plan_notify_request_done_ (pr);
+ if (NULL != pr->qe)
+ {
+ GNUNET_DATASTORE_cancel (pr->qe);
+ pr->qe = NULL;
+ }
+ if (NULL != pr->gh)
+ {
+ GNUNET_DHT_get_stop (pr->gh);
+ pr->gh = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
+ {
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ return;
+ }
+ GNUNET_assert (GNUNET_YES ==
+ clean_request (NULL, &pr->public_data.query, pr));
}
* @param cls closure for it
*/
void
-GSF_iterate_pending_requests_ (GSF_PendingRequestIterator it,
- void *cls)
+GSF_iterate_pending_requests_ (GSF_PendingRequestIterator it, void *cls)
{
- // FIXME
+ GNUNET_CONTAINER_multihashmap_iterate (pr_map,
+ (GNUNET_CONTAINER_HashMapIterator) it,
+ cls);
}
+
+
+/**
+ * Closure for "process_reply" function.
+ */
+struct ProcessReplyClosure
+{
+ /**
+ * The data for the reply.
+ */
+ const void *data;
+
+ /**
+ * Who gave us this reply? NULL for local host (or DHT)
+ */
+ struct GSF_ConnectedPeer *sender;
+
+ /**
+ * When the reply expires.
+ */
+ struct GNUNET_TIME_Absolute expiration;
+
+ /**
+ * Size of data.
+ */
+ size_t size;
+
+ /**
+ * Type of the block.
+ */
+ enum GNUNET_BLOCK_Type type;
+
+ /**
+ * How much was this reply worth to us?
+ */
+ uint32_t priority;
+
+ /**
+ * Anonymity requirements for this reply.
+ */
+ uint32_t anonymity_level;
+
+ /**
+ * Evaluation result (returned).
+ */
+ enum GNUNET_BLOCK_EvaluationResult eval;
+
+ /**
+ * Did we find a matching request?
+ */
+ int request_found;
+};
+
+
+/**
+ * Update the performance data for the sender (if any) since
+ * the sender successfully answered one of our queries.
+ *
+ * @param prq information about the sender
+ * @param pr request that was satisfied
+ */
+static void
+update_request_performance_data (struct ProcessReplyClosure *prq,
+ struct GSF_PendingRequest *pr)
+{
+ if (prq->sender == NULL)
+ return;
+ GSF_peer_update_performance_ (prq->sender, pr->public_data.start_time,
+ prq->priority);
+}
+
+
+/**
+ * We have received a reply; handle it!
+ *
+ * @param cls response (struct ProcessReplyClosure)
+ * @param key our query
+ * @param value value in the hash map (info about the query)
+ * @return GNUNET_YES (we should continue to iterate)
+ */
+static int
+process_reply (void *cls, const GNUNET_HashCode * key, void *value)
+{
+ struct ProcessReplyClosure *prq = cls;
+ struct GSF_PendingRequest *pr = value;
+ GNUNET_HashCode chash;
+ struct GNUNET_TIME_Absolute last_transmission;
+
+ if (NULL == pr->rh)
+ return GNUNET_YES;
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Matched result (type %u) for query `%s' with pending request\n",
+ (unsigned int) prq->type, GNUNET_h2s (key));
+#endif
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# replies received and matched"), 1,
+ GNUNET_NO);
+ prq->eval =
+ GNUNET_BLOCK_evaluate (GSF_block_ctx, prq->type, key, &pr->bf, pr->mingle,
+ &pr->public_data.namespace,
+ (prq->type ==
+ GNUNET_BLOCK_TYPE_FS_SBLOCK) ?
+ sizeof (GNUNET_HashCode) : 0, prq->data,
+ prq->size);
+ switch (prq->eval)
+ {
+ case GNUNET_BLOCK_EVALUATION_OK_MORE:
+ update_request_performance_data (prq, pr);
+ break;
+ case GNUNET_BLOCK_EVALUATION_OK_LAST:
+ /* short cut: stop processing early, no BF-update, etc. */
+ update_request_performance_data (prq, pr);
+ GNUNET_LOAD_update (GSF_rt_entry_lifetime,
+ GNUNET_TIME_absolute_get_duration (pr->
+ public_data.start_time).rel_value);
+ if (!GSF_request_plan_reference_get_last_transmission_ (pr->public_data.rpr_head, prq->sender, &last_transmission))
+ last_transmission.abs_value = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value;
+ /* pass on to other peers / local clients */
+ pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
+ last_transmission, prq->type, prq->data, prq->size);
+ return GNUNET_YES;
+ case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# duplicate replies discarded (bloomfilter)"),
+ 1, GNUNET_NO);
+#if DEBUG_FS && 0
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Duplicate response `%s', discarding.\n", GNUNET_h2s (&mhash));
+#endif
+ return GNUNET_YES; /* duplicate */
+ case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
+ return GNUNET_YES; /* wrong namespace */
+ case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
+ GNUNET_break (0);
+ return GNUNET_YES;
+ case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
+ GNUNET_break (0);
+ return GNUNET_YES;
+ case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Unsupported block type %u\n"),
+ prq->type);
+ return GNUNET_NO;
+ }
+ /* update bloomfilter */
+ GNUNET_CRYPTO_hash (prq->data, prq->size, &chash);
+ GSF_pending_request_update_ (pr, &chash, 1);
+ if (NULL == prq->sender)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found result for query `%s' in local datastore\n",
+ GNUNET_h2s (key));
+#endif
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# results found locally"), 1,
+ GNUNET_NO);
+ }
+ else
+ {
+ GSF_dht_lookup_ (pr);
+ }
+ prq->priority += pr->public_data.original_priority;
+ pr->public_data.priority = 0;
+ pr->public_data.original_priority = 0;
+ pr->public_data.results_found++;
+ prq->request_found = GNUNET_YES;
+ /* finally, pass on to other peer / local client */
+ if (!GSF_request_plan_reference_get_last_transmission_ (pr->public_data.rpr_head, prq->sender, &last_transmission))
+ last_transmission.abs_value = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value;
+ pr->rh (pr->rh_cls, prq->eval, pr, prq->anonymity_level, prq->expiration,
+ last_transmission, prq->type, prq->data, prq->size);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Context for the 'put_migration_continuation'.
+ */
+struct PutMigrationContext
+{
+
+ /**
+ * Start time for the operation.
+ */
+ struct GNUNET_TIME_Absolute start;
+
+ /**
+ * Request origin.
+ */
+ struct GNUNET_PeerIdentity origin;
+
+ /**
+ * GNUNET_YES if we had a matching request for this block,
+ * GNUNET_NO if not.
+ */
+ int requested;
+};
+
+
+/**
+ * Continuation called to notify client about result of the
+ * operation.
+ *
+ * @param cls closure
+ * @param success GNUNET_SYSERR on failure
+ * @param min_expiration minimum expiration time required for content to be stored
+ * @param msg NULL on success, otherwise an error message
+ */
+static void
+put_migration_continuation (void *cls, int success,
+ struct GNUNET_TIME_Absolute min_expiration,
+ const char *msg)
+{
+ struct PutMigrationContext *pmc = cls;
+ struct GSF_ConnectedPeer *cp;
+ struct GNUNET_TIME_Relative mig_pause;
+ struct GSF_PeerPerformanceData *ppd;
+
+ if (NULL != datastore_put_load)
+ {
+ if (GNUNET_SYSERR != success)
+ {
+ GNUNET_LOAD_update (datastore_put_load,
+ GNUNET_TIME_absolute_get_duration (pmc->start).rel_value);
+ }
+ else
+ {
+ /* on queue failure / timeout, increase the put load dramatically */
+ GNUNET_LOAD_update (datastore_put_load,
+ GNUNET_TIME_UNIT_MINUTES.rel_value);
+ }
+ }
+ cp = GSF_peer_get_ (&pmc->origin);
+ if (GNUNET_OK == success)
+ {
+ if (NULL != cp)
+ {
+ ppd = GSF_get_peer_performance_data_ (cp);
+ ppd->migration_delay.rel_value /= 2;
+ }
+ GNUNET_free (pmc);
+ return;
+ }
+ if ( (GNUNET_NO == success) &&
+ (GNUNET_NO == pmc->requested) &&
+ (NULL != cp) )
+ {
+ ppd = GSF_get_peer_performance_data_ (cp);
+ if (min_expiration.abs_value > 0)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asking to stop migration for %llu ms because datastore is full\n",
+ (unsigned long long) GNUNET_TIME_absolute_get_remaining (min_expiration).rel_value);
+#endif
+ GSF_block_peer_migration_ (cp, min_expiration);
+ }
+ else
+ {
+ ppd->migration_delay = GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_SECONDS,
+ ppd->migration_delay);
+ ppd->migration_delay = GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_HOURS,
+ ppd->migration_delay);
+ mig_pause.rel_value = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
+ ppd->migration_delay.rel_value);
+ ppd->migration_delay = GNUNET_TIME_relative_multiply (ppd->migration_delay, 2);
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Replicated content already exists locally, asking to stop migration for %llu ms\n",
+ (unsigned long long) mig_pause.rel_value);
+#endif
+ GSF_block_peer_migration_ (cp, GNUNET_TIME_relative_to_absolute (mig_pause));
+ }
+ }
+ GNUNET_free (pmc);
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Datastore `PUT' failures"), 1,
+ GNUNET_NO);
+}
+
+
+/**
+ * Test if the DATABASE (PUT) load on this peer is too high
+ * to even consider processing the query at
+ * all.
+ *
+ * @return GNUNET_YES if the load is too high to do anything (load high)
+ * GNUNET_NO to process normally (load normal or low)
+ */
+static int
+test_put_load_too_high (uint32_t priority)
+{
+ double ld;
+
+ if (NULL == datastore_put_load)
+ return GNUNET_NO;
+ if (GNUNET_LOAD_get_average (datastore_put_load) < 50)
+ return GNUNET_NO; /* very fast */
+ ld = GNUNET_LOAD_get_load (datastore_put_load);
+ if (ld < 2.0 * (1 + priority))
+ return GNUNET_NO;
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# storage requests dropped due to high load"), 1,
+ GNUNET_NO);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Iterator called on each result obtained for a DHT
+ * operation that expects a reply
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path peers on reply path (or NULL if not recorded)
+ * @param get_path_length number of entries in get_path
+ * @param put_path peers on the PUT path (or NULL if not recorded)
+ * @param put_path_length number of entries in get_path
+ * @param type type of the result
+ * @param size number of bytes in data
+ * @param data pointer to the result data
+ */
+static void
+handle_dht_reply (void *cls, struct GNUNET_TIME_Absolute exp,
+ const GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data)
+{
+ struct GSF_PendingRequest *pr = cls;
+ struct ProcessReplyClosure prq;
+ struct PutMigrationContext *pmc;
+
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Replies received from DHT"), 1,
+ GNUNET_NO);
+ memset (&prq, 0, sizeof (prq));
+ prq.data = data;
+ prq.expiration = exp;
+ /* do not allow migrated content to live longer than 1 year */
+ prq.expiration = GNUNET_TIME_absolute_min (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_YEARS),
+ prq.expiration);
+ prq.size = size;
+ prq.type = type;
+ process_reply (&prq, key, pr);
+ if ((GNUNET_YES == active_to_migration) &&
+ (GNUNET_NO == test_put_load_too_high (prq.priority)))
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Replicating result for query `%s' with priority %u\n",
+ GNUNET_h2s (key), prq.priority);
+#endif
+ pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
+ pmc->start = GNUNET_TIME_absolute_get ();
+ pmc->requested = GNUNET_YES;
+ if (NULL ==
+ GNUNET_DATASTORE_put (GSF_dsh, 0, key, size, data, type, prq.priority,
+ 1 /* anonymity */ ,
+ 0 /* replication */ ,
+ exp, 1 + prq.priority, MAX_DATASTORE_QUEUE,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ &put_migration_continuation, pmc))
+ {
+ put_migration_continuation (pmc, GNUNET_SYSERR, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
+ }
+ }
+}
+
+
+/**
+ * Consider looking up the data in the DHT (anonymity-level permitting).
+ *
+ * @param pr the pending request to process
+ */
+void
+GSF_dht_lookup_ (struct GSF_PendingRequest *pr)
+{
+ const void *xquery;
+ size_t xquery_size;
+ struct GNUNET_PeerIdentity pi;
+ char buf[sizeof (GNUNET_HashCode) * 2];
+
+ if (0 != pr->public_data.anonymity_level)
+ return;
+ if (NULL != pr->gh)
+ {
+ GNUNET_DHT_get_stop (pr->gh);
+ pr->gh = NULL;
+ }
+ xquery = NULL;
+ xquery_size = 0;
+ if (GNUNET_BLOCK_TYPE_FS_SBLOCK == pr->public_data.type)
+ {
+ xquery = buf;
+ memcpy (buf, &pr->public_data.namespace, sizeof (GNUNET_HashCode));
+ xquery_size = sizeof (GNUNET_HashCode);
+ }
+ if (0 != (pr->public_data.options & GSF_PRO_FORWARD_ONLY))
+ {
+ GNUNET_assert (0 != pr->sender_pid);
+ GNUNET_PEER_resolve (pr->sender_pid, &pi);
+ memcpy (&buf[xquery_size], &pi, sizeof (struct GNUNET_PeerIdentity));
+ xquery_size += sizeof (struct GNUNET_PeerIdentity);
+ }
+ pr->gh =
+ GNUNET_DHT_get_start (GSF_dht, GNUNET_TIME_UNIT_FOREVER_REL,
+ pr->public_data.type, &pr->public_data.query,
+ 5 /* DEFAULT_GET_REPLICATION */ ,
+ GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
+ /* FIXME: can no longer pass pr->bf/pr->mingle... */
+ xquery, xquery_size, &handle_dht_reply, pr);
+}
+
+
+/**
+ * Task that issues a warning if the datastore lookup takes too long.
+ *
+ * @param cls the 'struct GSF_PendingRequest'
+ * @param tc task context
+ */
+static void
+warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GSF_PendingRequest *pr = cls;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Datastore lookup already took %llu ms!\n"),
+ (unsigned long long)
+ GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
+ pr);
+}
+
+
+/**
+ * Task that issues a warning if the datastore lookup takes too long.
+ *
+ * @param cls the 'struct GSF_PendingRequest'
+ * @param tc task context
+ */
+static void
+odc_warn_delay_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GSF_PendingRequest *pr = cls;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("On-demand lookup already took %llu ms!\n"),
+ (unsigned long long)
+ GNUNET_TIME_absolute_get_duration (pr->qe_start).rel_value);
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+ &odc_warn_delay_task, pr);
+}
+
+
+/**
+ * We're processing (local) results for a search request
+ * from another peer. Pass applicable results to the
+ * peer and if we are done either clean up (operation
+ * complete) or forward to other peers (more results possible).
+ *
+ * @param cls our closure (struct PendingRequest)
+ * @param key key for the content
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param type type of the content
+ * @param priority priority of the content
+ * @param anonymity anonymity-level for the content
+ * @param expiration expiration time for the content
+ * @param uid unique identifier for the datum;
+ * maybe 0 if no unique identifier is available
+ */
+static void
+process_local_reply (void *cls, const GNUNET_HashCode * key, size_t size,
+ const void *data, enum GNUNET_BLOCK_Type type,
+ uint32_t priority, uint32_t anonymity,
+ struct GNUNET_TIME_Absolute expiration, uint64_t uid)
+{
+ struct GSF_PendingRequest *pr = cls;
+ GSF_LocalLookupContinuation cont;
+ struct ProcessReplyClosure prq;
+ GNUNET_HashCode query;
+ unsigned int old_rf;
+
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ if (NULL != pr->qe)
+ {
+ pr->qe = NULL;
+ if (NULL == key)
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (no results)"),
+ 1, GNUNET_NO);
+ }
+ if (GNUNET_NO == pr->have_first_uid)
+ {
+ pr->first_uid = uid;
+ pr->have_first_uid = 1;
+ }
+ else
+ {
+ if ((uid == pr->first_uid) && (key != NULL))
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (seen all)"),
+ 1, GNUNET_NO);
+ key = NULL; /* all replies seen! */
+ }
+ pr->have_first_uid++;
+ if ((pr->have_first_uid > MAX_RESULTS) && (key != NULL))
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups aborted (more than MAX_RESULTS)"),
+ 1, GNUNET_NO);
+ key = NULL; /* all replies seen! */
+ }
+ }
+ }
+ if (NULL == key)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "No further local responses available.\n");
+#endif
+ if ((pr->public_data.type == GNUNET_BLOCK_TYPE_FS_DBLOCK) ||
+ (pr->public_data.type == GNUNET_BLOCK_TYPE_FS_IBLOCK))
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# requested DBLOCK or IBLOCK not found"), 1,
+ GNUNET_NO);
+ goto check_error_and_continue;
+ }
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received reply for `%s' of type %d with UID %llu from datastore.\n",
+ GNUNET_h2s (key), type, (unsigned long long) uid);
+#endif
+ if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Found ONDEMAND block, performing on-demand encoding\n");
+#endif
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# on-demand blocks matched requests"), 1,
+ GNUNET_NO);
+ pr->qe_start = GNUNET_TIME_absolute_get ();
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+ &odc_warn_delay_task, pr);
+ if (GNUNET_OK ==
+ GNUNET_FS_handle_on_demand_block (key, size, data, type, priority,
+ anonymity, expiration, uid,
+ &process_local_reply, pr))
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# on-demand lookups performed successfully"),
+ 1, GNUNET_NO);
+ return; /* we're done */
+ }
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# on-demand lookups failed"), 1,
+ GNUNET_NO);
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+ &warn_delay_task, pr);
+ pr->qe =
+ GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
+ &pr->public_data.query,
+ pr->public_data.type ==
+ GNUNET_BLOCK_TYPE_FS_DBLOCK ?
+ GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED &
+ pr->public_data.options)) ? UINT_MAX : 1
+ /* queue priority */ ,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED &
+ pr->public_data.options)) ? UINT_MAX :
+ datastore_queue_size
+ /* max queue size */ ,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &process_local_reply, pr);
+ if (NULL != pr->qe)
+ return; /* we're done */
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (error queueing)"),
+ 1, GNUNET_NO);
+ goto check_error_and_continue;
+ }
+ old_rf = pr->public_data.results_found;
+ memset (&prq, 0, sizeof (prq));
+ prq.data = data;
+ prq.expiration = expiration;
+ prq.size = size;
+ if (GNUNET_OK !=
+ GNUNET_BLOCK_get_key (GSF_block_ctx, type, data, size, &query))
+ {
+ GNUNET_break (0);
+ GNUNET_DATASTORE_remove (GSF_dsh, key, size, data, -1, -1,
+ GNUNET_TIME_UNIT_FOREVER_REL, NULL, NULL);
+ pr->qe_start = GNUNET_TIME_absolute_get ();
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
+ &warn_delay_task, pr);
+ pr->qe =
+ GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset - 1,
+ &pr->public_data.query,
+ pr->public_data.type ==
+ GNUNET_BLOCK_TYPE_FS_DBLOCK ?
+ GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED &
+ pr->public_data.options)) ? UINT_MAX : 1
+ /* queue priority */ ,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED &
+ pr->public_data.options)) ? UINT_MAX :
+ datastore_queue_size
+ /* max queue size */ ,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &process_local_reply, pr);
+ if (pr->qe == NULL)
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (error queueing)"),
+ 1, GNUNET_NO);
+ goto check_error_and_continue;
+ }
+ return;
+ }
+ prq.type = type;
+ prq.priority = priority;
+ prq.request_found = GNUNET_NO;
+ prq.anonymity_level = anonymity;
+ if ((old_rf == 0) && (pr->public_data.results_found == 0))
+ GSF_update_datastore_delay_ (pr->public_data.start_time);
+ process_reply (&prq, key, pr);
+ pr->local_result = prq.eval;
+ if (prq.eval == GNUNET_BLOCK_EVALUATION_OK_LAST)
+ {
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (found last result)"),
+ 1, GNUNET_NO);
+ goto check_error_and_continue;
+ }
+ if ((0 == (GSF_PRO_PRIORITY_UNLIMITED & pr->public_data.options)) &&
+ ((GNUNET_YES == GSF_test_get_load_too_high_ (0)) ||
+ (pr->public_data.results_found > 5 + 2 * pr->public_data.priority)))
+ {
+#if DEBUG_FS > 2
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load too high, done with request\n");
+#endif
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (load too high)"),
+ 1, GNUNET_NO);
+ goto check_error_and_continue;
+ }
+ pr->qe_start = GNUNET_TIME_absolute_get ();
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
+ pr);
+ pr->qe =
+ GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
+ &pr->public_data.query,
+ pr->public_data.type ==
+ GNUNET_BLOCK_TYPE_FS_DBLOCK ?
+ GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED & pr->
+ public_data.options)) ? UINT_MAX : 1
+ /* queue priority */ ,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED & pr->
+ public_data.options)) ? UINT_MAX :
+ datastore_queue_size
+ /* max queue size */ ,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &process_local_reply, pr);
+ /* check if we successfully queued another datastore request;
+ * if so, return, otherwise call our continuation (if we have
+ * any) */
+check_error_and_continue:
+ if (NULL != pr->qe)
+ return;
+ if (GNUNET_SCHEDULER_NO_TASK != pr->warn_task)
+ {
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL == (cont = pr->llc_cont))
+ return; /* no continuation */
+ pr->llc_cont = NULL;
+ cont (pr->llc_cont_cls, pr, pr->local_result);
+}
+
+
+/**
+ * Is the given target a legitimate peer for forwarding the given request?
+ *
+ * @param pr request
+ * @param target
+ * @return GNUNET_YES if this request could be forwarded to the given peer
+ */
+int
+GSF_pending_request_test_target_ (struct GSF_PendingRequest *pr,
+ const struct GNUNET_PeerIdentity *target)
+{
+ struct GNUNET_PeerIdentity pi;
+
+ if (0 == pr->origin_pid)
+ return GNUNET_YES;
+ GNUNET_PEER_resolve (pr->origin_pid, &pi);
+ return (0 ==
+ memcmp (&pi, target,
+ sizeof (struct GNUNET_PeerIdentity))) ? GNUNET_NO :
+ GNUNET_YES;
+}
+
+
+/**
+ * Look up the request in the local datastore.
+ *
+ * @param pr the pending request to process
+ * @param cont function to call at the end
+ * @param cont_cls closure for cont
+ */
+void
+GSF_local_lookup_ (struct GSF_PendingRequest *pr,
+ GSF_LocalLookupContinuation cont, void *cont_cls)
+{
+ GNUNET_assert (NULL == pr->gh);
+ GNUNET_assert (NULL == pr->llc_cont);
+ pr->llc_cont = cont;
+ pr->llc_cont_cls = cont_cls;
+ pr->qe_start = GNUNET_TIME_absolute_get ();
+ pr->warn_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &warn_delay_task,
+ pr);
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# Datastore lookups initiated"), 1,
+ GNUNET_NO);
+ pr->qe =
+ GNUNET_DATASTORE_get_key (GSF_dsh, pr->local_result_offset++,
+ &pr->public_data.query,
+ pr->public_data.type ==
+ GNUNET_BLOCK_TYPE_FS_DBLOCK ?
+ GNUNET_BLOCK_TYPE_ANY : pr->public_data.type,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED & pr->
+ public_data.options)) ? UINT_MAX : 1
+ /* queue priority */ ,
+ (0 !=
+ (GSF_PRO_PRIORITY_UNLIMITED & pr->
+ public_data.options)) ? UINT_MAX :
+ datastore_queue_size
+ /* max queue size */ ,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &process_local_reply, pr);
+ if (NULL != pr->qe)
+ return;
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop
+ ("# Datastore lookups concluded (error queueing)"),
+ 1, GNUNET_NO);
+ GNUNET_SCHEDULER_cancel (pr->warn_task);
+ pr->warn_task = GNUNET_SCHEDULER_NO_TASK;
+ pr->llc_cont = NULL;
+ if (NULL != cont)
+ cont (cont_cls, pr, pr->local_result);
+}
+
+
+
/**
* Handle P2P "CONTENT" message. Checks that the message is
* well-formed and then checks if there are any pending requests for
* this content and possibly passes it on (to local clients or other
* peers). Does NOT perform migration (content caching at this peer).
*
- * @param other the other peer involved (sender or receiver, NULL
+ * @param cp the other peer involved (sender or receiver, NULL
* for loopback messages where we are both sender and receiver)
* @param message the actual message
- * @return how valueable was the content to us (0 for not at all),
+ * @return GNUNET_OK if the message was well-formed,
* GNUNET_SYSERR if the message was malformed (close connection,
* do not cache under any circumstances)
*/
int
-GSF_handle_p2p_content_ (const struct GNUNET_PeerIdentity *other,
- const struct GNUNET_MessageHeader *message)
+GSF_handle_p2p_content_ (struct GSF_ConnectedPeer *cp,
+ const struct GNUNET_MessageHeader *message)
{
- return GNUNET_SYSERR; // FIXME
+ const struct PutMessage *put;
+ uint16_t msize;
+ size_t dsize;
+ enum GNUNET_BLOCK_Type type;
+ struct GNUNET_TIME_Absolute expiration;
+ GNUNET_HashCode query;
+ struct ProcessReplyClosure prq;
+ struct GNUNET_TIME_Relative block_time;
+ double putl;
+ struct PutMigrationContext *pmc;
+
+ msize = ntohs (message->size);
+ if (msize < sizeof (struct PutMessage))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ put = (const struct PutMessage *) message;
+ dsize = msize - sizeof (struct PutMessage);
+ type = ntohl (put->type);
+ expiration = GNUNET_TIME_absolute_ntoh (put->expiration);
+ /* do not allow migrated content to live longer than 1 year */
+ expiration = GNUNET_TIME_absolute_min (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_YEARS),
+ expiration);
+ if (type == GNUNET_BLOCK_TYPE_FS_ONDEMAND)
+ return GNUNET_SYSERR;
+ if (GNUNET_OK !=
+ GNUNET_BLOCK_get_key (GSF_block_ctx, type, &put[1], dsize, &query))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_STATISTICS_update (GSF_stats,
+ gettext_noop ("# GAP PUT messages received"), 1,
+ GNUNET_NO);
+ /* now, lookup 'query' */
+ prq.data = (const void *) &put[1];
+ if (NULL != cp)
+ prq.sender = cp;
+ else
+ prq.sender = NULL;
+ prq.size = dsize;
+ prq.type = type;
+ prq.expiration = expiration;
+ prq.priority = 0;
+ prq.anonymity_level = UINT32_MAX;
+ prq.request_found = GNUNET_NO;
+ GNUNET_CONTAINER_multihashmap_get_multiple (pr_map, &query, &process_reply,
+ &prq);
+ if (NULL != cp)
+ {
+ GSF_connected_peer_change_preference_ (cp,
+ CONTENT_BANDWIDTH_VALUE +
+ 1000 * prq.priority);
+ GSF_get_peer_performance_data_ (cp)->trust += prq.priority;
+ }
+ if ((GNUNET_YES == active_to_migration) &&
+ (GNUNET_NO == test_put_load_too_high (prq.priority)))
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Replicating result for query `%s' with priority %u\n",
+ GNUNET_h2s (&query), prq.priority);
+#endif
+ pmc = GNUNET_malloc (sizeof (struct PutMigrationContext));
+ pmc->start = GNUNET_TIME_absolute_get ();
+ pmc->requested = prq.request_found;
+ GNUNET_assert (0 != GSF_get_peer_performance_data_ (cp)->pid);
+ GNUNET_PEER_resolve (GSF_get_peer_performance_data_ (cp)->pid,
+ &pmc->origin);
+ if (NULL ==
+ GNUNET_DATASTORE_put (GSF_dsh, 0, &query, dsize, &put[1], type,
+ prq.priority, 1 /* anonymity */ ,
+ 0 /* replication */ ,
+ expiration, 1 + prq.priority, MAX_DATASTORE_QUEUE,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ &put_migration_continuation, pmc))
+ {
+ put_migration_continuation (pmc, GNUNET_SYSERR, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
+ }
+ }
+ else
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Choosing not to keep content `%s' (%d/%d)\n",
+ GNUNET_h2s (&query), active_to_migration,
+ test_put_load_too_high (prq.priority));
+#endif
+ }
+ putl = GNUNET_LOAD_get_load (datastore_put_load);
+ if ((NULL != (cp = prq.sender)) && (GNUNET_NO == prq.request_found) &&
+ ((GNUNET_YES != active_to_migration) ||
+ (putl > 2.5 * (1 + prq.priority))))
+ {
+ if (GNUNET_YES != active_to_migration)
+ putl = 1.0 + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 5);
+ block_time =
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
+ 5000 +
+ GNUNET_CRYPTO_random_u32
+ (GNUNET_CRYPTO_QUALITY_WEAK,
+ (unsigned int) (60000 * putl * putl)));
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asking to stop migration for %llu ms because of load %f and events %d/%d\n",
+ (unsigned long long) block_time.rel_value,
+ putl,
+ active_to_migration,
+ (GNUNET_NO == prq.request_found));
+#endif
+ GSF_block_peer_migration_ (cp, GNUNET_TIME_relative_to_absolute (block_time));
+ }
+ return GNUNET_OK;
}
void
GSF_pending_request_init_ ()
{
- // FIXME
+ unsigned long long bps;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (GSF_cfg, "fs",
+ "MAX_PENDING_REQUESTS",
+ &max_pending_requests))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _
+ ("Configuration fails to specify `%s', assuming default value."),
+ "MAX_PENDING_REQUESTS");
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_size (GSF_cfg, "ats", "WAN_QUOTA_OUT",
+ &bps))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _
+ ("Configuration fails to specify `%s', assuming default value."),
+ "WAN_QUOTA_OUT");
+ bps = 65536;
+ }
+ /* queue size should be #queries we can have pending and satisfy within
+ * a carry interval: */
+ datastore_queue_size =
+ bps * GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S / DBLOCK_SIZE;
+
+ active_to_migration =
+ GNUNET_CONFIGURATION_get_value_yesno (GSF_cfg, "FS", "CONTENT_CACHING");
+ datastore_put_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
+ pr_map = GNUNET_CONTAINER_multihashmap_create (32 * 1024);
+ requests_by_expiration_heap =
+ GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
}
void
GSF_pending_request_done_ ()
{
- // FIXME
+ GNUNET_CONTAINER_multihashmap_iterate (pr_map, &clean_request, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (pr_map);
+ pr_map = NULL;
+ GNUNET_CONTAINER_heap_destroy (requests_by_expiration_heap);
+ requests_by_expiration_heap = NULL;
+ GNUNET_LOAD_value_free (datastore_put_load);
+ datastore_put_load = NULL;
}
projects / oweals / gnunet.git / blobdiff