/*
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.
struct ResultContext
{
/**
- * Iterator to call with the result.
+ * Function to call with the result.
*/
- GNUNET_DATASTORE_Iterator iter;
+ GNUNET_DATASTORE_DatumProcessor proc;
/**
- * Closure for iter.
+ * Closure for proc.
*/
- void *iter_cls;
+ void *proc_cls;
};
* Note that the overall struct should end at a
* multiple of 64 bits.
*/
- int32_t was_transmitted;
-
+ int was_transmitted;
+
};
/**
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
- * Our scheduler.
+ * Current connection to the datastore service.
*/
- struct GNUNET_SCHEDULER_Handle *sched;
+ struct GNUNET_CLIENT_Connection *client;
/**
- * Current connection to the datastore service.
+ * Handle for statistics.
*/
- struct GNUNET_CLIENT_Connection *client;
+ 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;
+
+ /**
+ * We should ignore the next message(s) from the service.
+ */
+ unsigned int skip_next_messages;
+
};
* 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 (NULL != h->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
+ h->th = NULL;
+ }
if (h->client != NULL)
{
GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
}
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))
{
GNUNET_assert (NULL != qe->response_proc);
- qe->response_proc (qe, NULL);
+ qe->response_proc (h, NULL);
}
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 !=
h))
return;
GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
+ h->client = NULL;
}
GNUNET_break (0);
}
+ GNUNET_STATISTICS_destroy (h->stats,
+ GNUNET_NO);
+ h->stats = NULL;
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);
+ GNUNET_assert (qe->was_transmitted == GNUNET_NO);
+ qe->response_proc (qe->h, NULL);
}
* @param timeout timeout for the operation
* @param response_proc function to call with replies (can be NULL)
* @param qc client context (NOT a closure for response_proc)
- * @return NULL if the queue is full (and this entry was dropped)
+ * @return NULL if the queue is full
*/
static struct GNUNET_DATASTORE_QueueEntry *
make_queue_entry (struct GNUNET_DATASTORE_Handle *h,
c++;
pos = pos->next;
}
+ if (c >= max_queue_size)
+ {
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# queue overflows"),
+ 1,
+ GNUNET_NO);
+ return NULL;
+ }
ret = GNUNET_malloc (sizeof (struct GNUNET_DATASTORE_QueueEntry) + msize);
ret->h = h;
ret->response_proc = response_proc;
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,
ret);
h->queue_size++;
- if (c > max_queue_size)
- {
- 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;
while (pos != NULL)
{
- if (pos->max_queue < h->queue_size)
+ if ( (pos->max_queue < h->queue_size) &&
+ (pos->was_transmitted == GNUNET_NO) )
{
GNUNET_assert (pos->response_proc != NULL);
- pos->response_proc (pos, NULL);
+ /* move 'pos' element to head so that it will be
+ killed on 'NULL' call below */
+ GNUNET_CONTAINER_DLL_remove (h->queue_head,
+ h->queue_tail,
+ pos);
+ GNUNET_CONTAINER_DLL_insert (h->queue_head,
+ h->queue_tail,
+ pos);
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# Requests dropped from datastore queue"),
+ 1,
+ GNUNET_NO);
+ pos->response_proc (h, NULL);
break;
}
pos = pos->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->skip_next_messages = 0;
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);
}
+/**
+ * Function called whenever we receive a message from
+ * the service. Calls the appropriate handler.
+ *
+ * @param cls the 'struct GNUNET_DATASTORE_Handle'
+ * @param msg the received message
+ */
+static void
+receive_cb (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct GNUNET_DATASTORE_Handle *h = cls;
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+
+ h->in_receive = GNUNET_NO;
+ if (h->skip_next_messages > 0)
+ {
+ h->skip_next_messages--;
+ process_queue (h);
+ return;
+ }
+ if (NULL == (qe = h->queue_head))
+ {
+ GNUNET_break (0);
+ process_queue (h);
+ return;
+ }
+ qe->response_proc (h, msg);
+}
+
+
/**
* Transmit request from queue to datastore service.
*
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;
+ GNUNET_assert (GNUNET_NO == h->in_receive);
+ h->in_receive = GNUNET_YES;
GNUNET_CLIENT_receive (h->client,
- qe->response_proc,
- qe,
+ &receive_cb,
+ h,
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 (GNUNET_YES == h->in_receive)
+ {
+ /* wait for response to previous query */
+ return;
+ }
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting %u bytes request to datastore\n",
+ "Queueing %u byte request to DATASTORE\n",
qe->message_size);
#endif
h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
GNUNET_YES,
&transmit_request,
h);
+ GNUNET_assert (GNUNET_NO == h->in_receive);
+ GNUNET_break (NULL != h->th);
}
* @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 */
}
+/**
+ * Free a queue entry. Removes the given entry from the
+ * queue and releases associated resources. Does NOT
+ * call the callback.
+ *
+ * @param qe entry to free.
+ */
static void
free_queue_entry (struct GNUNET_DATASTORE_QueueEntry *qe)
{
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--;
+ qe->was_transmitted = GNUNET_SYSERR; /* use-after-free warning */
GNUNET_free (qe);
}
+
/**
* Type of a function to call when we receive a message
* from the service.
const struct
GNUNET_MessageHeader * msg)
{
- struct GNUNET_DATASTORE_QueueEntry *qe = cls;
- struct GNUNET_DATASTORE_Handle *h = qe->h;
- struct StatusContext rc = qe->qc.sc;
+ struct GNUNET_DATASTORE_Handle *h = cls;
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+ struct StatusContext rc;
const struct StatusMessage *sm;
const char *emsg;
int32_t status;
int was_transmitted;
- was_transmitted = qe->was_transmitted;
+ if (NULL == (qe = h->queue_head))
+ {
+ GNUNET_break (0);
+ do_disconnect (h);
+ return;
+ }
+ rc = qe->qc.sc;
if (msg == NULL)
{
+ was_transmitted = qe->was_transmitted;
free_queue_entry (qe);
if (NULL == h->client)
return; /* forced disconnect */
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls,
+ GNUNET_SYSERR,
+ _("Failed to receive status response from database."));
if (was_transmitted == GNUNET_YES)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to receive response from database.\n"));
- do_disconnect (h);
- }
+ do_disconnect (h);
+ else
+ process_queue (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,
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to put %u bytes of data under key `%s'\n",
+ "Asked to put %u bytes of data under key `%s' for %llu ms\n",
size,
- GNUNET_h2s (key));
+ GNUNET_h2s (key),
+ GNUNET_TIME_absolute_get_remaining (expiration).rel_value);
#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);
+ dm->replication = htonl (replication);
+ dm->reserved = htonl (0);
dm->uid = GNUNET_htonll(0);
dm->expiration = GNUNET_TIME_absolute_hton(expiration);
dm->key = *key;
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);
*/
static void
process_result_message (void *cls,
- const struct GNUNET_MessageHeader * msg)
+ const struct GNUNET_MessageHeader *msg)
{
- struct GNUNET_DATASTORE_QueueEntry *qe = cls;
- struct GNUNET_DATASTORE_Handle *h = qe->h;
- struct ResultContext rc = qe->qc.rc;
+ struct GNUNET_DATASTORE_Handle *h = cls;
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+ struct ResultContext rc;
const struct DataMessage *dm;
- int was_transmitted;
if (msg == NULL)
{
- was_transmitted = qe->was_transmitted;
- free_queue_entry (qe);
- if (was_transmitted == GNUNET_YES)
+ qe = h->queue_head;
+ GNUNET_assert (NULL != qe);
+ if (qe->was_transmitted == GNUNET_YES)
{
+ rc = qe->qc.rc;
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failed to receive response from database.\n"));
do_disconnect (h);
+ free_queue_entry (qe);
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_cls,
+ NULL, 0, NULL, 0, 0, 0,
+ GNUNET_TIME_UNIT_ZERO_ABS, 0);
}
- if (rc.iter != NULL)
- rc.iter (rc.iter_cls,
- NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ else
+ process_queue (h);
return;
}
- GNUNET_assert (GNUNET_YES == qe->was_transmitted);
- GNUNET_assert (h->queue_head == qe);
if (ntohs(msg->type) == GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END)
{
GNUNET_break (ntohs(msg->size) == sizeof(struct GNUNET_MessageHeader));
+ qe = h->queue_head;
+ rc = qe->qc.rc;
+ GNUNET_assert (GNUNET_YES == qe->was_transmitted);
+ 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,
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_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;
}
+ qe = h->queue_head;
+ rc = qe->qc.rc;
+ GNUNET_assert (GNUNET_YES == qe->was_transmitted);
if ( (ntohs(msg->size) < sizeof(struct DataMessage)) ||
(ntohs(msg->type) != GNUNET_MESSAGE_TYPE_DATASTORE_DATA) ||
(ntohs(msg->size) != sizeof(struct DataMessage) + ntohl (((const struct DataMessage*)msg)->size)) )
free_queue_entry (qe);
h->retry_time = GNUNET_TIME_UNIT_ZERO;
do_disconnect (h);
- if (rc.iter != NULL)
- rc.iter (rc.iter_cls,
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_cls,
NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- if (rc.iter == NULL)
- {
- /* abort iteration */
- do_disconnect (h);
+ GNUNET_TIME_UNIT_ZERO_ABS, 0);
return;
}
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# Results received"),
+ 1,
+ GNUNET_NO);
dm = (const struct DataMessage*) msg;
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
ntohl(dm->size),
GNUNET_h2s(&dm->key));
#endif
- rc.iter (rc.iter_cls,
- &dm->key,
- ntohl(dm->size),
- &dm[1],
- ntohl(dm->type),
- ntohl(dm->priority),
- ntohl(dm->anonymity),
- GNUNET_TIME_absolute_ntoh(dm->expiration),
- GNUNET_ntohll(dm->uid));
+ free_queue_entry (qe);
+ h->retry_time.rel_value = 0;
+ process_queue (h);
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_cls,
+ &dm->key,
+ ntohl(dm->size),
+ &dm[1],
+ ntohl(dm->type),
+ ntohl(dm->priority),
+ ntohl(dm->anonymity),
+ GNUNET_TIME_absolute_ntoh(dm->expiration),
+ GNUNET_ntohll(dm->uid));
}
/**
- * 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
* @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 iter function to call on a random value; it
+ * @param proc 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
+ * @param proc_cls closure for proc
* @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)
+ * cancel
*/
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_DatumProcessor proc,
+ void *proc_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct GNUNET_MessageHeader *m;
union QueueContext qc;
+ GNUNET_assert (NULL != proc);
#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;
+ qc.rc.proc = proc;
+ qc.rc.proc_cls = proc_cls;
qe = make_queue_entry (h, sizeof(struct GNUNET_MessageHeader),
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;
+ }
+ 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 single zero-anonymity value from the datastore.
+ *
+ * @param h handle to the datastore
+ * @param offset offset of the result (mod #num-results); set to
+ * a random 64-bit value initially; then increment by
+ * one each time; detect that all results have been found by uid
+ * being again the first uid ever returned.
+ * @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 (never zero)
+ * @param proc function to call on a random value; it
+ * will be called once with a value (if available)
+ * or with NULL if none value exists.
+ * @param proc_cls closure for proc
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel
+ */
+struct GNUNET_DATASTORE_QueueEntry *
+GNUNET_DATASTORE_get_zero_anonymity (struct GNUNET_DATASTORE_Handle *h,
+ uint64_t offset,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ enum GNUNET_BLOCK_Type type,
+ GNUNET_DATASTORE_DatumProcessor proc,
+ void *proc_cls)
+{
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+ struct GetZeroAnonymityMessage *m;
+ union QueueContext qc;
+
+ GNUNET_assert (NULL != proc);
+ GNUNET_assert (type != GNUNET_BLOCK_TYPE_ANY);
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to get %llu-th zero-anonymity entry of type %d in %llu ms\n",
+ (unsigned long long) offset,
+ type,
+ (unsigned long long) timeout.rel_value);
+#endif
+ qc.rc.proc = proc;
+ qc.rc.proc_cls = proc_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 procation\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);
+ m->offset = GNUNET_htonll (offset);
+ 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.
+ * Get a result for a particular key from the datastore. The processor
+ * will only be called once.
*
* @param h handle to the datastore
+ * @param offset offset of the result (mod #num-results); set to
+ * a random 64-bit value initially; then increment by
+ * one each time; detect that all results have been found by uid
+ * being again the first uid ever returned.
* @param key maybe NULL (to match all entries)
* @param type desired type, 0 for any
* @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 iter function to call on each matching value;
+ * @param proc function to call on each matching value;
* will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param proc_cls closure for proc
* @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)
+ * cancel
*/
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_get_key (struct GNUNET_DATASTORE_Handle *h,
+ uint64_t offset,
+ 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_DatumProcessor proc,
+ void *proc_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct GetMessage *gm;
union QueueContext qc;
+ GNUNET_assert (NULL != proc);
#if DEBUG_DATASTORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Asked to look for data of type %u under key `%s'\n",
(unsigned int) type,
GNUNET_h2s (key));
#endif
- qc.rc.iter = iter;
- qc.rc.iter_cls = iter_cls;
+ qc.rc.proc = proc;
+ qc.rc.proc_cls = proc_cls;
qe = make_queue_entry (h, sizeof(struct GetMessage),
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);
+ gm->offset = GNUNET_htonll (offset);
if (key != NULL)
{
gm->header.size = htons(sizeof (struct GetMessage));
}
-/**
- * Function called to trigger obtaining the next result
- * 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)
-{
- 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);
-}
-
-
/**
* Cancel a datastore operation. The final callback from the
* operation must not have been done yet.
GNUNET_DATASTORE_cancel (struct GNUNET_DATASTORE_QueueEntry *qe)
{
struct GNUNET_DATASTORE_Handle *h;
- int reconnect;
+ GNUNET_assert (GNUNET_SYSERR != qe->was_transmitted);
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;
- GNUNET_DATASTORE_get_next (h, GNUNET_YES);
- return;
- }
- reconnect = GNUNET_YES;
+ free_queue_entry (qe);
+ h->skip_next_messages++;
+ return;
}
free_queue_entry (qe);
- h->queue_size--;
- if (reconnect)
- {
- h->retry_time = GNUNET_TIME_UNIT_ZERO;
- do_disconnect (h);
- }
+ process_queue (h);
}
projects / oweals / gnunet.git / blobdiff