/*
This file is part of GNUnet
- (C) 2004, 2005, 2006, 2007, 2009, 2010 Christian Grothoff (and other contributing authors)
+ (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
#include "gnunet_arm_service.h"
#include "gnunet_constants.h"
#include "gnunet_datastore_service.h"
+#include "gnunet_statistics_service.h"
#include "datastore.h"
+/**
+ * If a client stopped asking for more results, how many more do
+ * we receive from the DB before killing the connection? Trade-off
+ * between re-doing TCP handshakes and (needlessly) receiving
+ * useless results.
+ */
+#define MAX_EXCESS_RESULTS 8
/**
* Context for processing status messages.
* Note that the overall struct should end at a
* multiple of 64 bits.
*/
- int32_t was_transmitted;
-
+ int was_transmitted;
+
+ /**
+ * Are we expecting a single message in response to this
+ * request (and, if it is data, no 'END' message)?
+ */
+ int one_shot;
+
};
/**
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * Our scheduler.
- */
- struct GNUNET_SCHEDULER_Handle *sched;
/**
* Current connection to the datastore service.
*/
struct GNUNET_CLIENT_Connection *client;
+ /**
+ * Handle for statistics.
+ */
+ struct GNUNET_STATISTICS_Handle *stats;
+
/**
* Current transmit handle.
*/
*/
unsigned int queue_size;
+ /**
+ * Number of results we're receiving for the current query
+ * after application stopped to care. Used to determine when
+ * to reset the connection.
+ */
+ unsigned int result_count;
+
+ /**
+ * Are we currently trying to receive from the service?
+ */
+ int in_receive;
+
};
* Connect to the datastore service.
*
* @param cfg configuration to use
- * @param sched scheduler to use
* @return handle to use to access the service
*/
struct GNUNET_DATASTORE_Handle *
GNUNET_DATASTORE_connect (const struct
GNUNET_CONFIGURATION_Handle
- *cfg,
- struct
- GNUNET_SCHEDULER_Handle
- *sched)
+ *cfg)
{
struct GNUNET_CLIENT_Connection *c;
struct GNUNET_DATASTORE_Handle *h;
- c = GNUNET_CLIENT_connect (sched, "datastore", cfg);
+ c = GNUNET_CLIENT_connect ("datastore", cfg);
if (c == NULL)
return NULL; /* oops */
h = GNUNET_malloc (sizeof(struct GNUNET_DATASTORE_Handle) +
- GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ GNUNET_SERVER_MAX_MESSAGE_SIZE - 1);
h->client = c;
h->cfg = cfg;
- h->sched = sched;
+ h->stats = GNUNET_STATISTICS_create ("datastore-api",
+ cfg);
return h;
}
* @param h handle to the datastore
* @param drop set to GNUNET_YES to delete all data in datastore (!)
*/
-void GNUNET_DATASTORE_disconnect (struct GNUNET_DATASTORE_Handle *h,
- int drop)
+void
+GNUNET_DATASTORE_disconnect (struct GNUNET_DATASTORE_Handle *h,
+ int drop)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
}
if (h->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_SCHEDULER_cancel (h->sched,
- h->reconnect_task);
+ GNUNET_SCHEDULER_cancel (h->reconnect_task);
h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
}
while (NULL != (qe = h->queue_head))
}
if (GNUNET_YES == drop)
{
- h->client = GNUNET_CLIENT_connect (h->sched, "datastore", h->cfg);
+ h->client = GNUNET_CLIENT_connect ("datastore", h->cfg);
if (h->client != NULL)
{
if (NULL !=
}
GNUNET_break (0);
}
+ GNUNET_STATISTICS_destroy (h->stats,
+ GNUNET_NO);
GNUNET_free (h);
}
{
struct GNUNET_DATASTORE_QueueEntry *qe = cls;
+ GNUNET_STATISTICS_update (qe->h->stats,
+ gettext_noop ("# queue entry timeouts"),
+ 1,
+ GNUNET_NO);
qe->task = GNUNET_SCHEDULER_NO_TASK;
GNUNET_assert (qe->was_transmitted == GNUNET_NO);
qe->response_proc (qe, NULL);
pos = h->queue_head;
}
c++;
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# queue entries created"),
+ 1,
+ GNUNET_NO);
GNUNET_CONTAINER_DLL_insert_after (h->queue_head,
h->queue_tail,
pos,
h->queue_size++;
if (c > max_queue_size)
{
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# queue overflows"),
+ 1,
+ GNUNET_NO);
response_proc (ret, NULL);
return NULL;
}
- ret->task = GNUNET_SCHEDULER_add_delayed (h->sched,
- timeout,
+ ret->task = GNUNET_SCHEDULER_add_delayed (timeout,
&timeout_queue_entry,
ret);
pos = ret->next;
{
struct GNUNET_DATASTORE_Handle *h = cls;
- if (h->retry_time.value < GNUNET_CONSTANTS_SERVICE_RETRY.value)
+ if (h->retry_time.rel_value < GNUNET_CONSTANTS_SERVICE_RETRY.rel_value)
h->retry_time = GNUNET_CONSTANTS_SERVICE_RETRY;
else
h->retry_time = GNUNET_TIME_relative_multiply (h->retry_time, 2);
- if (h->retry_time.value > GNUNET_CONSTANTS_SERVICE_TIMEOUT.value)
+ if (h->retry_time.rel_value > GNUNET_CONSTANTS_SERVICE_TIMEOUT.rel_value)
h->retry_time = GNUNET_CONSTANTS_SERVICE_TIMEOUT;
h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- h->client = GNUNET_CLIENT_connect (h->sched, "datastore", h->cfg);
+ h->client = GNUNET_CLIENT_connect ("datastore", h->cfg);
if (h->client == NULL)
- return;
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "DATASTORE reconnect failed (fatally)\n");
+ return;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# datastore connections (re)created"),
+ 1,
+ GNUNET_NO);
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Reconnected to DATASTORE\n");
+#endif
process_queue (h);
}
do_disconnect (struct GNUNET_DATASTORE_Handle *h)
{
if (h->client == NULL)
- return;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "client NULL in disconnect, will not try to reconnect\n");
+#endif
+ return;
+ }
#if 0
GNUNET_STATISTICS_update (stats,
- gettext_noop ("# reconnected to datastore"),
+ gettext_noop ("# reconnected to DATASTORE"),
1,
GNUNET_NO);
#endif
GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
h->client = NULL;
- h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->sched,
- h->retry_time,
+ h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->retry_time,
&try_reconnect,
h);
}
if (buf == NULL)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to transmit request to database.\n"));
+ _("Failed to transmit request to DATASTORE.\n"));
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# transmission request failures"),
+ 1,
+ GNUNET_NO);
do_disconnect (h);
return 0;
}
process_queue (h);
return 0;
}
+ #if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting %u byte request to DATASTORE\n",
+ msize);
+#endif
memcpy (buf, &qe[1], msize);
qe->was_transmitted = GNUNET_YES;
- GNUNET_SCHEDULER_cancel (h->sched,
- qe->task);
+ GNUNET_SCHEDULER_cancel (qe->task);
qe->task = GNUNET_SCHEDULER_NO_TASK;
+ h->in_receive = GNUNET_YES;
GNUNET_CLIENT_receive (h->client,
qe->response_proc,
qe,
GNUNET_TIME_absolute_get_remaining (qe->timeout));
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# bytes sent to datastore"),
+ 1,
+ GNUNET_NO);
return msize;
}
struct GNUNET_DATASTORE_QueueEntry *qe;
if (NULL == (qe = h->queue_head))
- return; /* no entry in queue */
+ {
+#if DEBUG_DATASTORE > 1
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queue empty\n");
+#endif
+ return; /* no entry in queue */
+ }
if (qe->was_transmitted == GNUNET_YES)
- return; /* waiting for replies */
+ {
+#if DEBUG_DATASTORE > 1
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Head request already transmitted\n");
+#endif
+ return; /* waiting for replies */
+ }
if (h->th != NULL)
- return; /* request pending */
+ {
+#if DEBUG_DATASTORE > 1
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Pending transmission request\n");
+#endif
+ return; /* request pending */
+ }
if (h->client == NULL)
- return; /* waiting for reconnect */
+ {
+#if DEBUG_DATASTORE > 1
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Not connected\n");
+#endif
+ return; /* waiting for reconnect */
+ }
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queueing %u byte request to DATASTORE\n",
+ qe->message_size);
+#endif
h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
qe->message_size,
GNUNET_TIME_absolute_get_remaining (qe->timeout),
* @param emsg error message
*/
static void
-drop_status_cont (void *cls, int result, const char *emsg)
+drop_status_cont (void *cls, int32_t result, const char *emsg)
{
/* do nothing */
}
qe);
if (qe->task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_SCHEDULER_cancel (h->sched,
- qe->task);
+ GNUNET_SCHEDULER_cancel (qe->task);
qe->task = GNUNET_SCHEDULER_NO_TASK;
}
h->queue_size--;
const struct StatusMessage *sm;
const char *emsg;
int32_t status;
+ int was_transmitted;
- free_queue_entry (qe);
+ h->in_receive = GNUNET_NO;
+ was_transmitted = qe->was_transmitted;
if (msg == NULL)
{
+ free_queue_entry (qe);
if (NULL == h->client)
return; /* forced disconnect */
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to receive response from database.\n"));
- do_disconnect (h);
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls,
+ GNUNET_SYSERR,
+ _("Failed to receive status response from database."));
+ if (was_transmitted == GNUNET_YES)
+ do_disconnect (h);
return;
}
-
+ GNUNET_assert (GNUNET_YES == qe->was_transmitted);
+ GNUNET_assert (h->queue_head == qe);
+ free_queue_entry (qe);
if ( (ntohs(msg->size) < sizeof(struct StatusMessage)) ||
(ntohs(msg->type) != GNUNET_MESSAGE_TYPE_DATASTORE_STATUS) )
{
GNUNET_break (0);
h->retry_time = GNUNET_TIME_UNIT_ZERO;
do_disconnect (h);
- rc.cont (rc.cont_cls,
- GNUNET_SYSERR,
- _("Error reading response from datastore service"));
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls,
+ GNUNET_SYSERR,
+ _("Error reading response from datastore service"));
return;
}
sm = (const struct StatusMessage*) msg;
(int) status,
emsg);
#endif
- rc.cont (rc.cont_cls,
- status,
- emsg);
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# status messages received"),
+ 1,
+ GNUNET_NO);
+ h->retry_time.rel_value = 0;
process_queue (h);
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls,
+ status,
+ emsg);
}
* @param type type of the content
* @param priority priority of the content
* @param anonymity anonymity-level for the content
+ * @param replication how often should the content be replicated to other peers?
* @param expiration expiration time for the content
* @param queue_priority ranking of this request in the priority queue
* @param max_queue_size at what queue size should this request be dropped
*/
struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_put (struct GNUNET_DATASTORE_Handle *h,
- int rid,
+ uint32_t rid,
const GNUNET_HashCode * key,
- uint32_t size,
+ size_t size,
const void *data,
enum GNUNET_BLOCK_Type type,
uint32_t priority,
uint32_t anonymity,
+ uint32_t replication,
struct GNUNET_TIME_Absolute expiration,
unsigned int queue_priority,
unsigned int max_queue_size,
GNUNET_h2s (key));
#endif
msize = sizeof(struct DataMessage) + size;
- GNUNET_assert (msize <= GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
qc.sc.cont = cont;
qc.sc.cont_cls = cont_cls;
qe = make_queue_entry (h, msize,
queue_priority, max_queue_size, timeout,
&process_status_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for PUT\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# PUT requests executed"),
+ 1,
+ GNUNET_NO);
dm = (struct DataMessage* ) &qe[1];
dm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_PUT);
dm->header.size = htons(msize);
dm->rid = htonl(rid);
- dm->size = htonl(size);
+ dm->size = htonl( (uint32_t) size);
dm->type = htonl(type);
dm->priority = htonl(priority);
dm->anonymity = htonl(anonymity);
queue_priority, max_queue_size, timeout,
&process_status_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry to reserve\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# RESERVE requests executed"),
+ 1,
+ GNUNET_NO);
rm = (struct ReserveMessage*) &qe[1];
rm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE);
rm->header.size = htons(sizeof (struct ReserveMessage));
*/
struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_release_reserve (struct GNUNET_DATASTORE_Handle *h,
- int rid,
+ uint32_t rid,
unsigned int queue_priority,
unsigned int max_queue_size,
struct GNUNET_TIME_Relative timeout,
queue_priority, max_queue_size, timeout,
&process_status_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry to release reserve\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# RELEASE RESERVE requests executed"),
+ 1,
+ GNUNET_NO);
rrm = (struct ReleaseReserveMessage*) &qe[1];
rrm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE);
rrm->header.size = htons(sizeof (struct ReleaseReserveMessage));
*/
struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_update (struct GNUNET_DATASTORE_Handle *h,
- unsigned long long uid,
+ uint64_t uid,
uint32_t priority,
struct GNUNET_TIME_Absolute expiration,
unsigned int queue_priority,
"Asked to update entry %llu raising priority by %u and expiration to %llu\n",
uid,
(unsigned int) priority,
- (unsigned long long) expiration.value);
+ (unsigned long long) expiration.abs_value);
#endif
qc.sc.cont = cont;
qc.sc.cont_cls = cont_cls;
queue_priority, max_queue_size, timeout,
&process_status_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for UPDATE\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# UPDATE requests executed"),
+ 1,
+ GNUNET_NO);
um = (struct UpdateMessage*) &qe[1];
um->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE);
um->header.size = htons(sizeof (struct UpdateMessage));
struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_remove (struct GNUNET_DATASTORE_Handle *h,
const GNUNET_HashCode *key,
- uint32_t size,
+ size_t size,
const void *data,
unsigned int queue_priority,
unsigned int max_queue_size,
qc.sc.cont = cont;
qc.sc.cont_cls = cont_cls;
msize = sizeof(struct DataMessage) + size;
- GNUNET_assert (msize <= GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
qe = make_queue_entry (h, msize,
queue_priority, max_queue_size, timeout,
&process_status_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for REMOVE\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# REMOVE requests executed"),
+ 1,
+ GNUNET_NO);
dm = (struct DataMessage*) &qe[1];
dm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE);
dm->header.size = htons(msize);
const struct DataMessage *dm;
int was_transmitted;
+ h->in_receive = GNUNET_NO;
if (msg == NULL)
- {
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to receive response from datastore or queue full\n");
-#endif
+ {
was_transmitted = qe->was_transmitted;
free_queue_entry (qe);
- if (GNUNET_YES == was_transmitted)
- do_disconnect (h);
+ if (was_transmitted == GNUNET_YES)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to receive response from database.\n"));
+ do_disconnect (h);
+ }
+ else
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Request dropped due to finite datastore queue length.\n");
+#endif
+ }
if (rc.iter != NULL)
rc.iter (rc.iter_cls,
NULL, 0, NULL, 0, 0, 0,
if (ntohs(msg->type) == GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END)
{
GNUNET_break (ntohs(msg->size) == sizeof(struct GNUNET_MessageHeader));
+ free_queue_entry (qe);
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received end of result set\n");
+ "Received end of result set, new queue size is %u\n",
+ h->queue_size);
#endif
- free_queue_entry (qe);
if (rc.iter != NULL)
rc.iter (rc.iter_cls,
NULL, 0, NULL, 0, 0, 0,
GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ h->retry_time.rel_value = 0;
+ h->result_count = 0;
process_queue (h);
return;
}
GNUNET_TIME_UNIT_ZERO_ABS, 0);
return;
}
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# Results received"),
+ 1,
+ GNUNET_NO);
if (rc.iter == NULL)
{
- /* abort iteration */
- do_disconnect (h);
+ h->result_count++;
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# Excess results received"),
+ 1,
+ GNUNET_NO);
+ if (h->result_count > MAX_EXCESS_RESULTS)
+ {
+ free_queue_entry (qe);
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# Forced database connection resets"),
+ 1,
+ GNUNET_NO);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
+ do_disconnect (h);
+ return;
+ }
+ if (GNUNET_YES == qe->one_shot)
+ free_queue_entry (qe);
+ else
+ GNUNET_DATASTORE_iterate_get_next (h);
return;
}
dm = (const struct DataMessage*) msg;
ntohl(dm->size),
GNUNET_h2s(&dm->key));
#endif
+ if (GNUNET_YES == qe->one_shot)
+ free_queue_entry (qe);
+ h->retry_time.rel_value = 0;
rc.iter (rc.iter_cls,
&dm->key,
ntohl(dm->size),
/**
- * Get a random value from the datastore.
+ * Get a random value from the datastore for content replication.
+ * Returns a single, random value among those with the highest
+ * replication score, lowering positive replication scores by one for
+ * the chosen value (if only content with a replication score exists,
+ * a random value is returned and replication scores are not changed).
*
* @param h handle to the datastore
* @param queue_priority ranking of this request in the priority queue
* (or rather, will already have been invoked)
*/
struct GNUNET_DATASTORE_QueueEntry *
-GNUNET_DATASTORE_get_random (struct GNUNET_DATASTORE_Handle *h,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+GNUNET_DATASTORE_get_for_replication (struct GNUNET_DATASTORE_Handle *h,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_Iterator iter,
+ void *iter_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct GNUNET_MessageHeader *m;
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to get random entry in %llu ms\n",
- (unsigned long long) timeout.value);
+ "Asked to get replication entry in %llu ms\n",
+ (unsigned long long) timeout.rel_value);
#endif
qc.rc.iter = iter;
qc.rc.iter_cls = iter_cls;
queue_priority, max_queue_size, timeout,
&process_result_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for GET REPLICATION\n");
+#endif
+ return NULL;
+ }
+ qe->one_shot = GNUNET_YES;
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# GET REPLICATION requests executed"),
+ 1,
+ GNUNET_NO);
m = (struct GNUNET_MessageHeader*) &qe[1];
- m->type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET_RANDOM);
+ m->type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION);
m->size = htons(sizeof (struct GNUNET_MessageHeader));
process_queue (h);
return qe;
}
+/**
+ * Get a zero-anonymity value from the datastore.
+ *
+ * @param h handle to the datastore
+ * @param queue_priority ranking of this request in the priority queue
+ * @param max_queue_size at what queue size should this request be dropped
+ * (if other requests of higher priority are in the queue)
+ * @param timeout how long to wait at most for a response
+ * @param type allowed type for the operation
+ * @param iter function to call on a random value; it
+ * will be called once with a value (if available)
+ * and always once with a value of NULL.
+ * @param iter_cls closure for iter
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
+ */
+struct GNUNET_DATASTORE_QueueEntry *
+GNUNET_DATASTORE_iterate_zero_anonymity (struct GNUNET_DATASTORE_Handle *h,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ enum GNUNET_BLOCK_Type type,
+ GNUNET_DATASTORE_Iterator iter,
+ void *iter_cls)
+{
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+ struct GetZeroAnonymityMessage *m;
+ union QueueContext qc;
+
+ GNUNET_assert (type != GNUNET_BLOCK_TYPE_ANY);
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to get zero-anonymity entry in %llu ms\n",
+ (unsigned long long) timeout.rel_value);
+#endif
+ qc.rc.iter = iter;
+ qc.rc.iter_cls = iter_cls;
+ qe = make_queue_entry (h, sizeof(struct GetZeroAnonymityMessage),
+ queue_priority, max_queue_size, timeout,
+ &process_result_message, &qc);
+ if (qe == NULL)
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for zero-anonymity iteration\n");
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# GET ZERO ANONYMITY requests executed"),
+ 1,
+ GNUNET_NO);
+ m = (struct GetZeroAnonymityMessage*) &qe[1];
+ m->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY);
+ m->header.size = htons(sizeof (struct GetZeroAnonymityMessage));
+ m->type = htonl ((uint32_t) type);
+ process_queue (h);
+ return qe;
+}
+
+
/**
* Iterate over the results for a particular key
* in the datastore. The iterator will only be called
* once initially; if the first call did contain a
* result, further results can be obtained by calling
- * "GNUNET_DATASTORE_get_next" with the given argument.
+ * "GNUNET_DATASTORE_iterate_get_next" with the given argument.
*
* @param h handle to the datastore
* @param key maybe NULL (to match all entries)
* (or rather, will already have been invoked)
*/
struct GNUNET_DATASTORE_QueueEntry *
-GNUNET_DATASTORE_get (struct GNUNET_DATASTORE_Handle *h,
- const GNUNET_HashCode * key,
- enum GNUNET_BLOCK_Type type,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+GNUNET_DATASTORE_iterate_key (struct GNUNET_DATASTORE_Handle *h,
+ const GNUNET_HashCode * key,
+ enum GNUNET_BLOCK_Type type,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_Iterator iter,
+ void *iter_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct GetMessage *gm;
queue_priority, max_queue_size, timeout,
&process_result_message, &qc);
if (qe == NULL)
- return NULL;
+ {
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not queue request for `%s'\n",
+ GNUNET_h2s (key));
+#endif
+ return NULL;
+ }
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# GET requests executed"),
+ 1,
+ GNUNET_NO);
gm = (struct GetMessage*) &qe[1];
gm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET);
gm->type = htonl(type);
* from the datastore.
*
* @param h handle to the datastore
- * @param more GNUNET_YES to get moxre results, GNUNET_NO to abort
- * iteration (with a final call to "iter" with key/data == NULL).
*/
void
-GNUNET_DATASTORE_get_next (struct GNUNET_DATASTORE_Handle *h,
- int more)
+GNUNET_DATASTORE_iterate_get_next (struct GNUNET_DATASTORE_Handle *h)
{
struct GNUNET_DATASTORE_QueueEntry *qe = h->queue_head;
- struct ResultContext rc = qe->qc.rc;
- GNUNET_assert (NULL != qe);
GNUNET_assert (&process_result_message == qe->response_proc);
- if (GNUNET_YES == more)
- {
- GNUNET_CLIENT_receive (h->client,
- qe->response_proc,
- qe,
- GNUNET_TIME_absolute_get_remaining (qe->timeout));
- return;
- }
- free_queue_entry (qe);
- h->retry_time = GNUNET_TIME_UNIT_ZERO;
- do_disconnect (h);
- rc.iter (rc.iter_cls,
- NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ h->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (h->client,
+ qe->response_proc,
+ qe,
+ GNUNET_TIME_absolute_get_remaining (qe->timeout));
}
GNUNET_DATASTORE_cancel (struct GNUNET_DATASTORE_QueueEntry *qe)
{
struct GNUNET_DATASTORE_Handle *h;
- int reconnect;
h = qe->h;
- reconnect = GNUNET_NO;
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Pending DATASTORE request %p cancelled (%d, %d)\n",
+ qe,
+ qe->was_transmitted,
+ h->queue_head == qe);
+#endif
if (GNUNET_YES == qe->was_transmitted)
{
- if (qe->response_proc == &process_result_message)
- qe->qc.rc.iter = NULL;
- else
- reconnect = GNUNET_YES;
- }
-
- free_queue_entry (qe);
- h->queue_size--;
- if (reconnect)
- {
+ free_queue_entry (qe);
h->retry_time = GNUNET_TIME_UNIT_ZERO;
do_disconnect (h);
+ return;
}
+ free_queue_entry (qe);
+ process_queue (h);
}
projects / oweals / gnunet.git / blobdiff