/*
This file is part of GNUnet
- (C) 2004, 2005, 2006, 2007, 2009, 2010 Christian Grothoff (and other contributing authors)
+ (C) 2004-2013 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"
+#define LOG(kind,...) GNUNET_log_from (kind, "datastore-api",__VA_ARGS__)
+
+/**
+ * Collect an instane number of statistics? May cause excessive IPC.
+ */
+#define INSANE_STATISTICS GNUNET_NO
+
+/**
+ * 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 StatusContext
+{
+ /**
+ * Continuation to call with the status.
+ */
+ GNUNET_DATASTORE_ContinuationWithStatus cont;
+
+ /**
+ * Closure for cont.
+ */
+ void *cont_cls;
+
+};
+
+
+/**
+ * Context for processing result messages.
+ */
+struct ResultContext
+{
+ /**
+ * Function to call with the result.
+ */
+ GNUNET_DATASTORE_DatumProcessor proc;
+
+ /**
+ * Closure for proc.
+ */
+ void *proc_cls;
+
+};
+
+
+/**
+ * Context for a queue operation.
+ */
+union QueueContext
+{
+
+ struct StatusContext sc;
+
+ struct ResultContext rc;
+
+};
+
+
+
/**
* Entry in our priority queue.
*/
/**
* Response processor (NULL if we are not waiting for a response).
* This struct should be used for the closure, function-specific
- * arguments can be passed via 'client_ctx'.
+ * arguments can be passed via 'qc'.
*/
GNUNET_CLIENT_MessageHandler response_proc;
-
- /**
- * Specific context (variable argument that
- * can be used by the response processor).
- */
- void *client_ctx;
/**
* Function to call after transmission of the request.
*/
GNUNET_DATASTORE_ContinuationWithStatus cont;
-
+
/**
* Closure for 'cont'.
*/
void *cont_cls;
+ /**
+ * Context for the operation.
+ */
+ union QueueContext qc;
+
/**
* Task for timeout signalling.
*/
/**
* Has this message been transmitted to the service?
* Only ever GNUNET_YES for the head of the queue.
- * Note that the overall struct should end at a
+ * Note that the overall struct should end at a
* multiple of 64 bits.
*/
- int32_t was_transmitted;
+ int was_transmitted;
};
/**
- * Handle to the datastore service.
+ * Handle to the datastore service.
*/
struct GNUNET_DATASTORE_Handle
{
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)
+GNUNET_DATASTORE_connect (const struct GNUNET_CONFIGURATION_Handle *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);
+ return NULL; /* oops */
+ h = GNUNET_malloc (sizeof (struct GNUNET_DATASTORE_Handle) +
+ 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;
}
+/**
+ * Task used by 'transmit_drop' to disconnect the datastore.
+ *
+ * @param cls the datastore handle
+ * @param tc scheduler context
+ */
+static void
+disconnect_after_drop (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_DATASTORE_Handle *h = cls;
+
+ GNUNET_DATASTORE_disconnect (h, GNUNET_NO);
+}
+
+
/**
* Transmit DROP message to datastore service.
*
- * @param cls the 'struct GNUNET_DATASTORE_Handle'
- * @param size number of bytes that can be copied to buf
+ * @param cls the `struct GNUNET_DATASTORE_Handle`
+ * @param size number of bytes that can be copied to @a buf
* @param buf where to copy the drop message
- * @return number of bytes written to buf
+ * @return number of bytes written to @a buf
*/
static size_t
-transmit_drop (void *cls,
- size_t size,
- void *buf)
+transmit_drop (void *cls, size_t size, void *buf)
{
struct GNUNET_DATASTORE_Handle *h = cls;
struct GNUNET_MessageHeader *hdr;
-
+
if (buf == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to transmit request to drop database.\n"));
- GNUNET_DATASTORE_disconnect (h, GNUNET_NO);
- return 0;
- }
- GNUNET_assert (size >= sizeof(struct GNUNET_MessageHeader));
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to transmit request to drop database.\n"));
+ GNUNET_SCHEDULER_add_continuation (&disconnect_after_drop, h,
+ GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+ return 0;
+ }
+ GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
hdr = buf;
- hdr->size = htons(sizeof(struct GNUNET_MessageHeader));
- hdr->type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_DROP);
- GNUNET_DATASTORE_disconnect (h, GNUNET_NO);
- return sizeof(struct GNUNET_MessageHeader);
+ hdr->size = htons (sizeof (struct GNUNET_MessageHeader));
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_DATASTORE_DROP);
+ GNUNET_SCHEDULER_add_continuation (&disconnect_after_drop, h,
+ GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+ return sizeof (struct GNUNET_MessageHeader);
}
* associated resources).
*
* @param h handle to the datastore
- * @param drop set to GNUNET_YES to delete all data in 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;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Datastore disconnect\n");
+ 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);
- h->client = NULL;
- }
+ {
+ GNUNET_CLIENT_disconnect (h->client);
+ h->client = NULL;
+ }
if (h->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (h->sched,
- h->reconnect_task);
- h->reconnect_task = GNUNET_SCHEDULER_NO_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 (h, NULL);
+ }
+ if (GNUNET_YES == drop)
+ {
+ h->client = GNUNET_CLIENT_connect ("datastore", h->cfg);
+ if (h->client != NULL)
{
- GNUNET_assert (NULL != qe->response_proc);
- qe->response_proc (qe, NULL);
- }
- if (GNUNET_YES == drop)
- {
- h->client = GNUNET_CLIENT_connect (h->sched, "datastore", h->cfg);
- if (h->client != NULL)
- {
- if (NULL !=
- GNUNET_CLIENT_notify_transmit_ready (h->client,
- sizeof(struct GNUNET_MessageHeader),
- GNUNET_TIME_UNIT_MINUTES,
- GNUNET_YES,
- &transmit_drop,
- h))
- return;
- GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
- }
- GNUNET_break (0);
+ if (NULL !=
+ GNUNET_CLIENT_notify_transmit_ready (h->client,
+ sizeof (struct
+ GNUNET_MessageHeader),
+ GNUNET_TIME_UNIT_MINUTES,
+ GNUNET_YES, &transmit_drop, h))
+ return;
+ GNUNET_CLIENT_disconnect (h->client);
+ h->client = NULL;
}
+ GNUNET_break (0);
+ }
+ GNUNET_STATISTICS_destroy (h->stats, GNUNET_NO);
+ h->stats = NULL;
GNUNET_free (h);
}
/**
* A request has timed out (before being transmitted to the service).
*
- * @param cls the 'struct GNUNET_DATASTORE_QueueEntry'
+ * @param cls the `struct GNUNET_DATASTORE_QueueEntry`
* @param tc scheduler context
*/
static void
-timeout_queue_entry (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+timeout_queue_entry (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_DATASTORE_QueueEntry *qe = cls;
+ struct GNUNET_DATASTORE_Handle *h = qe->h;
+ GNUNET_STATISTICS_update (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 (GNUNET_NO == qe->was_transmitted);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Timeout of request in datastore queue\n");
+ /* response_proc's expect request at the head of the queue! */
+ GNUNET_CONTAINER_DLL_remove (h->queue_head, h->queue_tail, qe);
+ GNUNET_CONTAINER_DLL_insert (h->queue_head, h->queue_tail, qe);
+ GNUNET_assert (h->queue_head == qe);
+ qe->response_proc (qe->h, NULL);
}
* (if other requests of higher priority are in the queue)
* @param timeout timeout for the operation
* @param response_proc function to call with replies (can be NULL)
- * @param client_ctx client context (NOT a closure for response_proc)
- * @return NULL if the queue is full (and this entry was dropped)
+ * @param qc client context (NOT a closure for @a response_proc)
+ * @return NULL if the queue is full
*/
static struct GNUNET_DATASTORE_QueueEntry *
-make_queue_entry (struct GNUNET_DATASTORE_Handle *h,
- size_t msize,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_CLIENT_MessageHandler response_proc,
- void *client_ctx)
+make_queue_entry (struct GNUNET_DATASTORE_Handle *h, size_t msize,
+ unsigned int queue_priority, unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CLIENT_MessageHandler response_proc,
+ const union QueueContext *qc)
{
struct GNUNET_DATASTORE_QueueEntry *ret;
struct GNUNET_DATASTORE_QueueEntry *pos;
c = 0;
pos = h->queue_head;
- while ( (pos != NULL) &&
- (c < max_queue_size) &&
- (pos->priority >= queue_priority) )
- {
- c++;
- pos = pos->next;
- }
+ while ((pos != NULL) && (c < max_queue_size) &&
+ (pos->priority >= queue_priority))
+ {
+ 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;
- ret->client_ctx = client_ctx;
+ ret->qc = *qc;
ret->timeout = GNUNET_TIME_relative_to_absolute (timeout);
ret->priority = queue_priority;
ret->max_queue = max_queue_size;
ret->message_size = msize;
ret->was_transmitted = GNUNET_NO;
if (pos == NULL)
- {
- /* append at the tail */
- pos = h->queue_tail;
- }
+ {
+ /* append at the tail */
+ pos = h->queue_tail;
+ }
else
- {
- pos = pos->prev;
- /* do not insert at HEAD if HEAD query was already
- transmitted and we are still receiving replies! */
- if ( (pos == NULL) &&
- (h->queue_head->was_transmitted) )
- pos = h->queue_head;
- }
+ {
+ pos = pos->prev;
+ /* do not insert at HEAD if HEAD query was already
+ * transmitted and we are still receiving replies! */
+ if ((pos == NULL) && (h->queue_head->was_transmitted))
+ pos = h->queue_head;
+ }
c++;
- GNUNET_CONTAINER_DLL_insert_after (h->queue_head,
- h->queue_tail,
- pos,
- ret);
+#if INSANE_STATISTICS
+ GNUNET_STATISTICS_update (h->stats, gettext_noop ("# queue entries created"),
+ 1, GNUNET_NO);
+#endif
+ 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);
- GNUNET_free (ret);
- return NULL;
- }
- ret->task = GNUNET_SCHEDULER_add_delayed (h->sched,
- timeout,
- &timeout_queue_entry,
- ret);
- pos = ret->next;
- while (pos != NULL)
+ ret->task = GNUNET_SCHEDULER_add_delayed (timeout, &timeout_queue_entry, ret);
+ for (pos = ret->next; NULL != pos; pos = pos->next)
+ {
+ if ((pos->max_queue < h->queue_size) && (pos->was_transmitted == GNUNET_NO))
{
- if (pos->max_queue < h->queue_size)
- {
- GNUNET_assert (pos->response_proc != NULL);
- pos->response_proc (pos, NULL);
- break;
- }
- pos = pos->next;
+ GNUNET_assert (NULL != pos->response_proc);
+ /* move 'pos' element to head so that it will be
+ * killed on 'NULL' call below */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Dropping request from datastore queue\n");
+ /* response_proc's expect request at the head of the queue! */
+ 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);
+ GNUNET_assert (h->queue_head == pos);
+ pos->response_proc (h, NULL);
+ break;
}
+ }
return ret;
}
/**
* Process entries in the queue (or do nothing if we are already
* doing so).
- *
+ *
* @param h handle to the datastore
*/
static void
/**
* Try reconnecting to the datastore service.
*
- * @param cls the 'struct GNUNET_DATASTORE_Handle'
+ * @param cls the `struct GNUNET_DATASTORE_Handle`
* @param tc scheduler context
*/
static void
-try_reconnect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+try_reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_DATASTORE_Handle *h = cls;
- if (h->retry_time.value < GNUNET_CONSTANTS_SERVICE_RETRY.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)
- h->retry_time = GNUNET_CONSTANTS_SERVICE_TIMEOUT;
+ h->retry_time = GNUNET_TIME_STD_BACKOFF (h->retry_time);
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)
+ {
+ 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);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Reconnected to DATASTORE\n");
process_queue (h);
}
do_disconnect (struct GNUNET_DATASTORE_Handle *h)
{
if (h->client == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "client NULL in disconnect, will not try to reconnect\n");
return;
- GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
+ }
+ GNUNET_CLIENT_disconnect (h->client);
+ h->skip_next_messages = 0;
h->client = NULL;
- h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->sched,
- h->retry_time,
- &try_reconnect,
- h);
+ h->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (h->retry_time, &try_reconnect, h);
}
/**
- * Transmit request from queue to datastore service.
+ * Function called whenever we receive a message from
+ * the service. Calls the appropriate handler.
*
* @param cls the 'struct GNUNET_DATASTORE_Handle'
- * @param size number of bytes that can be copied to buf
+ * @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;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Receiving reply from datastore\n");
+ 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.
+ *
+ * @param cls the `struct GNUNET_DATASTORE_Handle`
+ * @param size number of bytes that can be copied to @a buf
* @param buf where to copy the drop message
- * @return number of bytes written to buf
+ * @return number of bytes written to @a buf
*/
static size_t
-transmit_request (void *cls,
- size_t size,
- void *buf)
+transmit_request (void *cls, size_t size, void *buf)
{
struct GNUNET_DATASTORE_Handle *h = cls;
struct GNUNET_DATASTORE_QueueEntry *qe;
h->th = NULL;
if (NULL == (qe = h->queue_head))
- return 0; /* no entry in queue */
+ return 0; /* no entry in queue */
if (buf == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to transmit request to database.\n"));
- do_disconnect (h);
- return 0;
- }
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "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;
+ }
if (size < (msize = qe->message_size))
- {
- process_queue (h);
- return 0;
- }
+ {
+ process_queue (h);
+ return 0;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Transmitting %u byte request to DATASTORE\n",
+ msize);
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_CLIENT_receive (h->client,
- qe->response_proc,
- qe,
- GNUNET_TIME_absolute_get_remaining (qe->timeout));
+ GNUNET_assert (GNUNET_NO == h->in_receive);
+ h->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (h->client, &receive_cb, h,
+ GNUNET_TIME_absolute_get_remaining (qe->timeout));
+#if INSANE_STATISTICS
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# bytes sent to datastore"), 1,
+ GNUNET_NO);
+#endif
return msize;
}
/**
* Process entries in the queue (or do nothing if we are already
* doing so).
- *
+ *
* @param h handle to the datastore
*/
static void
struct GNUNET_DATASTORE_QueueEntry *qe;
if (NULL == (qe = h->queue_head))
- return; /* no entry in queue */
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Queue empty\n");
+ return; /* no entry in queue */
+ }
if (qe->was_transmitted == GNUNET_YES)
- return; /* waiting for replies */
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Head request already transmitted\n");
+ return; /* waiting for replies */
+ }
if (h->th != NULL)
- return; /* request pending */
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Pending transmission request\n");
+ return; /* request pending */
+ }
if (h->client == NULL)
- return; /* waiting for reconnect */
- h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
- qe->message_size,
- GNUNET_TIME_absolute_get_remaining (qe->timeout),
- GNUNET_YES,
- &transmit_request,
- h);
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Not connected\n");
+ return; /* waiting for reconnect */
+ }
+ if (GNUNET_YES == h->in_receive)
+ {
+ /* wait for response to previous query */
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Queueing %u byte request to DATASTORE\n",
+ qe->message_size);
+ h->th =
+ GNUNET_CLIENT_notify_transmit_ready (h->client, qe->message_size,
+ GNUNET_TIME_absolute_get_remaining
+ (qe->timeout), GNUNET_YES,
+ &transmit_request, h);
+ GNUNET_assert (GNUNET_NO == h->in_receive);
+ GNUNET_break (NULL != h->th);
}
-
-
-/**
- * Context for processing status messages.
- */
-struct StatusContext
-{
- /**
- * Continuation to call with the status.
- */
- GNUNET_DATASTORE_ContinuationWithStatus cont;
-
- /**
- * Closure for cont.
- */
- void *cont_cls;
-
-};
-
-
/**
* Dummy continuation used to do nothing (but be non-zero).
*
* @param cls closure
- * @param result result
+ * @param result result
+ * @param min_expiration expiration time
* @param emsg error message
*/
static void
-drop_status_cont (void *cls, int result, const char *emsg)
+drop_status_cont (void *cls, int32_t result,
+ struct GNUNET_TIME_Absolute min_expiration,
+ 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)
{
struct GNUNET_DATASTORE_Handle *h = qe->h;
- GNUNET_CONTAINER_DLL_remove (h->queue_head,
- h->queue_tail,
- qe);
+ GNUNET_CONTAINER_DLL_remove (h->queue_head, h->queue_tail, qe);
if (qe->task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (h->sched,
- qe->task);
- qe->task = GNUNET_SCHEDULER_NO_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.
* @param cls closure
* @param msg message received, NULL on timeout or fatal error
*/
-static void
-process_status_message (void *cls,
- const struct
- GNUNET_MessageHeader * msg)
+static void
+process_status_message (void *cls, const struct GNUNET_MessageHeader *msg)
{
- struct GNUNET_DATASTORE_QueueEntry *qe = cls;
- struct GNUNET_DATASTORE_Handle *h = qe->h;
- struct StatusContext *rc = qe->client_ctx;
+ 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;
- free_queue_entry (qe);
+ if (NULL == (qe = h->queue_head))
+ {
+ GNUNET_break (0);
+ do_disconnect (h);
+ return;
+ }
+ rc = qe->qc.sc;
if (msg == NULL)
- {
- if (NULL == h->client)
- return; /* forced disconnect */
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to receive response from database.\n"));
- do_disconnect (h);
- return;
- }
-
- 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;
+ {
+ was_transmitted = qe->was_transmitted;
+ free_queue_entry (qe);
+ if (was_transmitted == GNUNET_YES)
do_disconnect (h);
- rc->cont (rc->cont_cls,
- GNUNET_SYSERR,
- _("Error reading response from datastore service"));
- GNUNET_free (rc);
- return;
- }
- sm = (const struct StatusMessage*) msg;
- status = ntohl(sm->status);
+ else
+ process_queue (h);
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls, GNUNET_SYSERR,
+ GNUNET_TIME_UNIT_ZERO_ABS,
+ _("Failed to receive status response from database."));
+ return;
+ }
+ GNUNET_assert (GNUNET_YES == qe->was_transmitted);
+ 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);
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls, GNUNET_SYSERR,
+ GNUNET_TIME_UNIT_ZERO_ABS,
+ _("Error reading response from datastore service"));
+ return;
+ }
+ sm = (const struct StatusMessage *) msg;
+ status = ntohl (sm->status);
emsg = NULL;
- if (ntohs(msg->size) > sizeof(struct StatusMessage))
- {
- emsg = (const char*) &sm[1];
- if (emsg[ntohs(msg->size) - sizeof(struct StatusMessage) - 1] != '\0')
- {
- GNUNET_break (0);
- emsg = _("Invalid error message received from datastore service");
- }
- }
- if ( (status == GNUNET_SYSERR) &&
- (emsg == NULL) )
+ if (ntohs (msg->size) > sizeof (struct StatusMessage))
+ {
+ emsg = (const char *) &sm[1];
+ if (emsg[ntohs (msg->size) - sizeof (struct StatusMessage) - 1] != '\0')
{
GNUNET_break (0);
emsg = _("Invalid error message received from datastore service");
}
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received status %d/%s\n",
- (int) status,
- emsg);
-#endif
- rc->cont (rc->cont_cls,
- status,
- emsg);
- GNUNET_free (rc);
+ }
+ if ((status == GNUNET_SYSERR) && (emsg == NULL))
+ {
+ GNUNET_break (0);
+ emsg = _("Invalid error message received from datastore service");
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Received status %d/%s\n", (int) status, emsg);
+ GNUNET_STATISTICS_update (h->stats,
+ gettext_noop ("# status messages received"), 1,
+ GNUNET_NO);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
process_queue (h);
+ if (rc.cont != NULL)
+ rc.cont (rc.cont_cls, status,
+ GNUNET_TIME_absolute_ntoh (sm->min_expiration),
+ 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
* (if other requests of higher priority are in the queue)
* @param timeout timeout for the operation
* @param cont continuation to call when done
- * @param cont_cls closure for cont
+ * @param cont_cls closure for @a cont
* @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_put (struct GNUNET_DATASTORE_Handle *h,
- int rid,
- const GNUNET_HashCode * key,
- uint32_t size,
- const void *data,
- enum GNUNET_BLOCK_Type type,
- uint32_t priority,
- uint32_t anonymity,
+GNUNET_DATASTORE_put (struct GNUNET_DATASTORE_Handle *h, uint32_t rid,
+ const struct GNUNET_HashCode * key, 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,
+ unsigned int queue_priority, unsigned int max_queue_size,
struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls)
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls)
{
- struct StatusContext *scont;
struct GNUNET_DATASTORE_QueueEntry *qe;
struct DataMessage *dm;
size_t msize;
-
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to put %u bytes of data under key `%s'\n",
- size,
- GNUNET_h2s (key));
-#endif
- msize = sizeof(struct DataMessage) + size;
- GNUNET_assert (msize <= GNUNET_SERVER_MAX_MESSAGE_SIZE);
- scont = GNUNET_malloc (sizeof (struct StatusContext));
- scont->cont = cont;
- scont->cont_cls = cont_cls;
- qe = make_queue_entry (h, msize,
- queue_priority, max_queue_size, timeout,
- &process_status_message, scont);
+ union QueueContext qc;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to put %u bytes of data under key `%s' for %s\n", size,
+ GNUNET_h2s (key),
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (expiration),
+ GNUNET_YES));
+ msize = sizeof (struct DataMessage) + 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)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Could not create queue entry for PUT\n");
return NULL;
- 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->type = htonl(type);
- dm->priority = htonl(priority);
- dm->anonymity = htonl(anonymity);
- dm->uid = GNUNET_htonll(0);
- dm->expiration = GNUNET_TIME_absolute_hton(expiration);
+ }
+ 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 ((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;
memcpy (&dm[1], data, size);
process_queue (h);
* @param timeout how long to wait at most for a response (or before dying in queue)
* @param cont continuation to call when done; "success" will be set to
* a positive reservation value if space could be reserved.
- * @param cont_cls closure for cont
+ * @param cont_cls closure for @a cont
* @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_reserve (struct GNUNET_DATASTORE_Handle *h,
- uint64_t amount,
- uint32_t entries,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls)
+GNUNET_DATASTORE_reserve (struct GNUNET_DATASTORE_Handle *h, uint64_t amount,
+ uint32_t entries, unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct ReserveMessage *rm;
- struct StatusContext *scont;
+ union QueueContext qc;
if (cont == NULL)
cont = &drop_status_cont;
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to reserve %llu bytes of data and %u entries'\n",
- (unsigned long long) amount,
- (unsigned int) entries);
-#endif
- scont = GNUNET_malloc (sizeof (struct StatusContext));
- scont->cont = cont;
- scont->cont_cls = cont_cls;
- qe = make_queue_entry (h, sizeof(struct ReserveMessage),
- queue_priority, max_queue_size, timeout,
- &process_status_message, scont);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to reserve %llu bytes of data and %u entries\n",
+ (unsigned long long) amount, (unsigned int) entries);
+ qc.sc.cont = cont;
+ qc.sc.cont_cls = cont_cls;
+ qe = make_queue_entry (h, sizeof (struct ReserveMessage), queue_priority,
+ max_queue_size, timeout, &process_status_message, &qc);
if (qe == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry to reserve\n");
return NULL;
- rm = (struct ReserveMessage*) &qe[1];
- rm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE);
- rm->header.size = htons(sizeof (struct ReserveMessage));
- rm->entries = htonl(entries);
- rm->amount = GNUNET_htonll(amount);
+ }
+ 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));
+ rm->entries = htonl (entries);
+ rm->amount = GNUNET_htonll (amount);
process_queue (h);
return qe;
}
* (if other requests of higher priority are in the queue)
* @param timeout how long to wait at most for a response
* @param cont continuation to call when done
- * @param cont_cls closure for cont
+ * @param cont_cls closure for @a cont
* @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_release_reserve (struct GNUNET_DATASTORE_Handle *h,
- int rid,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls)
+ uint32_t rid, unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct ReleaseReserveMessage *rrm;
- struct StatusContext *scont;
+ union QueueContext qc;
if (cont == NULL)
cont = &drop_status_cont;
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to release reserve %d\n",
- rid);
-#endif
- scont = GNUNET_malloc (sizeof (struct StatusContext));
- scont->cont = cont;
- scont->cont_cls = cont_cls;
- qe = make_queue_entry (h, sizeof(struct ReleaseReserveMessage),
- queue_priority, max_queue_size, timeout,
- &process_status_message, scont);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Asked to release reserve %d\n", rid);
+ qc.sc.cont = cont;
+ qc.sc.cont_cls = cont_cls;
+ qe = make_queue_entry (h, sizeof (struct ReleaseReserveMessage),
+ queue_priority, max_queue_size, timeout,
+ &process_status_message, &qc);
if (qe == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry to release reserve\n");
return NULL;
- rrm = (struct ReleaseReserveMessage*) &qe[1];
- rrm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE);
- rrm->header.size = htons(sizeof (struct ReleaseReserveMessage));
- rrm->rid = htonl(rid);
+ }
+ 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));
+ rrm->rid = htonl (rid);
process_queue (h);
return qe;
}
* (if other requests of higher priority are in the queue)
* @param timeout how long to wait at most for a response
* @param cont continuation to call when done
- * @param cont_cls closure for cont
+ * @param cont_cls closure for @a cont
* @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_update (struct GNUNET_DATASTORE_Handle *h,
- unsigned long long uid,
- uint32_t priority,
- struct GNUNET_TIME_Absolute expiration,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls)
+GNUNET_DATASTORE_update (struct GNUNET_DATASTORE_Handle *h, uint64_t uid,
+ uint32_t priority,
+ struct GNUNET_TIME_Absolute expiration,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct UpdateMessage *um;
- struct StatusContext *scont;
+ union QueueContext qc;
if (cont == NULL)
cont = &drop_status_cont;
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to update entry %llu raising priority by %u and expiration to %llu\n",
- uid,
- (unsigned int) priority,
- (unsigned long long) expiration.value);
-#endif
- scont = GNUNET_malloc (sizeof (struct StatusContext));
- scont->cont = cont;
- scont->cont_cls = cont_cls;
- qe = make_queue_entry (h, sizeof(struct UpdateMessage),
- queue_priority, max_queue_size, timeout,
- &process_status_message, scont);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to update entry %llu raising priority by %u and expiration to %s\n",
+ uid,
+ (unsigned int) priority,
+ GNUNET_STRINGS_absolute_time_to_string (expiration));
+ qc.sc.cont = cont;
+ qc.sc.cont_cls = cont_cls;
+ qe = make_queue_entry (h, sizeof (struct UpdateMessage), queue_priority,
+ max_queue_size, timeout, &process_status_message, &qc);
if (qe == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for UPDATE\n");
return NULL;
- um = (struct UpdateMessage*) &qe[1];
- um->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE);
- um->header.size = htons(sizeof (struct UpdateMessage));
- um->priority = htonl(priority);
- um->expiration = GNUNET_TIME_absolute_hton(expiration);
- um->uid = GNUNET_htonll(uid);
+ }
+ 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));
+ um->priority = htonl (priority);
+ um->expiration = GNUNET_TIME_absolute_hton (expiration);
+ um->uid = GNUNET_htonll (uid);
process_queue (h);
return qe;
}
/**
* Explicitly remove some content from the database.
- * The "cont"inuation will be called with status
- * "GNUNET_OK" if content was removed, "GNUNET_NO"
- * if no matching entry was found and "GNUNET_SYSERR"
+ * The @a cont continuation will be called with `status`
+ * #GNUNET_OK" if content was removed, #GNUNET_NO
+ * if no matching entry was found and #GNUNET_SYSERR
* on all other types of errors.
*
* @param h handle to the datastore
* (if other requests of higher priority are in the queue)
* @param timeout how long to wait at most for a response
* @param cont continuation to call when done
- * @param cont_cls closure for cont
+ * @param cont_cls closure for @a cont
* @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_remove (struct GNUNET_DATASTORE_Handle *h,
- const GNUNET_HashCode *key,
- uint32_t size,
- const void *data,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls)
+ const struct GNUNET_HashCode * key, size_t size,
+ const void *data, unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls)
{
struct GNUNET_DATASTORE_QueueEntry *qe;
struct DataMessage *dm;
size_t msize;
- struct StatusContext *scont;
+ union QueueContext qc;
if (cont == NULL)
cont = &drop_status_cont;
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to remove %u bytes under key `%s'\n",
- size,
- GNUNET_h2s (key));
-#endif
- scont = GNUNET_malloc (sizeof (struct StatusContext));
- scont->cont = cont;
- scont->cont_cls = cont_cls;
- msize = sizeof(struct DataMessage) + size;
- GNUNET_assert (msize <= GNUNET_SERVER_MAX_MESSAGE_SIZE);
- qe = make_queue_entry (h, msize,
- queue_priority, max_queue_size, timeout,
- &process_status_message, scont);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Asked to remove %u bytes under key `%s'\n",
+ size, GNUNET_h2s (key));
+ qc.sc.cont = cont;
+ qc.sc.cont_cls = cont_cls;
+ msize = sizeof (struct DataMessage) + 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)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Could not create queue entry for REMOVE\n");
return NULL;
- dm = (struct DataMessage*) &qe[1];
- dm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE);
- dm->header.size = htons(msize);
- dm->rid = htonl(0);
- dm->size = htonl(size);
- dm->type = htonl(0);
- dm->priority = htonl(0);
- dm->anonymity = htonl(0);
- dm->uid = GNUNET_htonll(0);
- dm->expiration = GNUNET_TIME_absolute_hton(GNUNET_TIME_UNIT_ZERO_ABS);
+ }
+ 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);
+ dm->rid = htonl (0);
+ dm->size = htonl (size);
+ dm->type = htonl (0);
+ dm->priority = htonl (0);
+ dm->anonymity = htonl (0);
+ dm->uid = GNUNET_htonll (0);
+ dm->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_UNIT_ZERO_ABS);
dm->key = *key;
memcpy (&dm[1], data, size);
process_queue (h);
}
-
-/**
- * Context for processing result messages.
- */
-struct ResultContext
-{
- /**
- * Iterator to call with the result.
- */
- GNUNET_DATASTORE_Iterator iter;
-
- /**
- * Closure for iter.
- */
- void *iter_cls;
-
-};
-
-
/**
* Type of a function to call when we receive a message
* from the service.
*
- * @param cls closure
+ * @param cls closure with the `struct GNUNET_DATASTORE_Handle *`
* @param msg message received, NULL on timeout or fatal error
*/
-static void
-process_result_message (void *cls,
- const struct GNUNET_MessageHeader * msg)
+static void
+process_result_message (void *cls, const struct GNUNET_MessageHeader *msg)
{
- struct GNUNET_DATASTORE_QueueEntry *qe = cls;
- struct GNUNET_DATASTORE_Handle *h = qe->h;
- struct ResultContext *rc = qe->client_ctx;
+ struct GNUNET_DATASTORE_Handle *h = cls;
+ struct GNUNET_DATASTORE_QueueEntry *qe;
+ struct ResultContext rc;
const struct DataMessage *dm;
-
- GNUNET_assert (h->queue_head == qe);
- if (msg == NULL)
+ int was_transmitted;
+
+ if (NULL == msg)
+ {
+ qe = h->queue_head;
+ GNUNET_assert (NULL != qe);
+ rc = qe->qc.rc;
+ was_transmitted = qe->was_transmitted;
+ free_queue_entry (qe);
+ if (GNUNET_YES == was_transmitted)
{
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to receive response from datastore\n"));
-#endif
- free_queue_entry (qe);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to receive response from database.\n"));
do_disconnect (h);
- rc->iter (rc->iter_cls,
- NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
- GNUNET_free (rc);
- return;
}
- if (ntohs(msg->type) == GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END)
+ else
{
- GNUNET_break (ntohs(msg->size) == sizeof(struct GNUNET_MessageHeader));
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received end of result set\n");
-#endif
- free_queue_entry (qe);
- rc->iter (rc->iter_cls,
- NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
- GNUNET_free (rc);
process_queue (h);
- return;
- }
- 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)) )
- {
- GNUNET_break (0);
- 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);
- GNUNET_free (rc);
- return;
}
- dm = (const struct DataMessage*) msg;
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received result %llu with type %u and size %u with key %s\n",
- (unsigned long long) GNUNET_ntohll(dm->uid),
- ntohl(dm->type),
- ntohl(dm->size),
- GNUNET_h2s(&dm->key));
+ if (NULL != rc.proc)
+ rc.proc (rc.proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS,
+ 0);
+ return;
+ }
+ 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);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received end of result set, new queue size is %u\n", h->queue_size);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
+ h->result_count = 0;
+ process_queue (h);
+ if (NULL != rc.proc)
+ rc.proc (rc.proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS,
+ 0);
+ return;
+ }
+ qe = h->queue_head;
+ GNUNET_assert (NULL != qe);
+ rc = qe->qc.rc;
+ if (GNUNET_YES != qe->was_transmitted)
+ {
+ GNUNET_break (0);
+ free_queue_entry (qe);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
+ do_disconnect (h);
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS,
+ 0);
+ return;
+ }
+ 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)))
+ {
+ GNUNET_break (0);
+ free_queue_entry (qe);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
+ do_disconnect (h);
+ if (rc.proc != NULL)
+ rc.proc (rc.proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS,
+ 0);
+ return;
+ }
+#if INSANE_STATISTICS
+ GNUNET_STATISTICS_update (h->stats, gettext_noop ("# Results received"), 1,
+ GNUNET_NO);
#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));
+ dm = (const struct DataMessage *) msg;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received result %llu with type %u and size %u with key %s\n",
+ (unsigned long long) GNUNET_ntohll (dm->uid), ntohl (dm->type),
+ ntohl (dm->size), GNUNET_h2s (&dm->key));
+ free_queue_entry (qe);
+ h->retry_time = GNUNET_TIME_UNIT_ZERO;
+ 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 @a 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;
- struct ResultContext *rcont;
-
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asked to get random entry in %llu ms\n",
- (unsigned long long) timeout.value);
-#endif
- rcont = GNUNET_malloc (sizeof (struct ResultContext));
- rcont->iter = iter;
- rcont->iter_cls = iter_cls;
- qe = make_queue_entry (h, sizeof(struct GNUNET_MessageHeader),
- queue_priority, max_queue_size, timeout,
- &process_result_message, rcont);
- if (qe == NULL)
- return NULL;
- m = (struct GNUNET_MessageHeader*) &qe[1];
- m->type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET_RANDOM);
- m->size = htons(sizeof (struct GNUNET_MessageHeader));
+ union QueueContext qc;
+
+ GNUNET_assert (NULL != proc);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to get replication entry in %s\n",
+ GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_YES));
+ 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 (NULL == qe)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for GET REPLICATION\n");
+ 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_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 (modulo 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 @a 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);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to get %llu-th zero-anonymity entry of type %d in %s\n",
+ (unsigned long long) offset, type,
+ GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_YES));
+ 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 (NULL == qe)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not create queue entry for zero-anonymity procation\n");
+ 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 (modulo 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 @a 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 struct 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;
- struct ResultContext *rcont;
-
-#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
- rcont = GNUNET_malloc (sizeof (struct ResultContext));
- rcont->iter = iter;
- rcont->iter_cls = iter_cls;
- qe = make_queue_entry (h, sizeof(struct GetMessage),
- queue_priority, max_queue_size, timeout,
- &process_result_message, rcont);
+ union QueueContext qc;
+
+ GNUNET_assert (NULL != proc);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to look for data of type %u under key `%s'\n",
+ (unsigned int) type, GNUNET_h2s (key));
+ 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)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Could not queue request for `%s'\n",
+ GNUNET_h2s (key));
return NULL;
- gm = (struct GetMessage*) &qe[1];
- gm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_GET);
- gm->type = htonl(type);
+ }
+#if INSANE_STATISTICS
+ GNUNET_STATISTICS_update (h->stats, gettext_noop ("# GET requests executed"),
+ 1, GNUNET_NO);
+#endif
+ 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));
- gm->key = *key;
- }
+ {
+ gm->header.size = htons (sizeof (struct GetMessage));
+ gm->key = *key;
+ }
else
- {
- gm->header.size = htons(sizeof (struct GetMessage) - sizeof(GNUNET_HashCode));
- }
+ {
+ gm->header.size =
+ htons (sizeof (struct GetMessage) - sizeof (struct GNUNET_HashCode));
+ }
process_queue (h);
return qe;
}
-/**
- * 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->client_ctx;
-
- 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);
- GNUNET_free (rc);
-}
-
-
/**
* Cancel a datastore operation. The final callback from the
* operation must not have been done yet.
- *
+ *
* @param qe operation to cancel
*/
void
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 = qe->was_transmitted;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Pending DATASTORE request %p cancelled (%d, %d)\n", qe,
+ qe->was_transmitted, h->queue_head == qe);
+ if (GNUNET_YES == qe->was_transmitted)
+ {
+ 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);
}