}
+/**
+ * Context for a put request used to see if the content is
+ * already present.
+ */
+struct PutContext
+{
+ /**
+ * Client to notify on completion.
+ */
+ struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Did we find the data already in the database?
+ */
+ int is_present;
+
+ /* followed by the 'struct DataMessage' */
+};
+
+
+/**
+ * Actually put the data message.
+ */
+static void
+execute_put (struct GNUNET_SERVER_Client *client,
+ const struct DataMessage *dm)
+{
+ uint32_t size;
+ char *msg;
+ int ret;
+
+ size = ntohl(dm->size);
+ msg = NULL;
+ ret = plugin->api->put (plugin->api->cls,
+ &dm->key,
+ size,
+ &dm[1],
+ ntohl(dm->type),
+ ntohl(dm->priority),
+ ntohl(dm->anonymity),
+ GNUNET_TIME_absolute_ntoh(dm->expiration),
+ &msg);
+ if (GNUNET_OK == ret)
+ {
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# bytes stored"),
+ size,
+ GNUNET_YES);
+ GNUNET_CONTAINER_bloomfilter_add (filter,
+ &dm->key);
+#if DEBUG_DATASTORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Successfully stored %u bytes of type %u under key `%s'\n",
+ size,
+ ntohl(dm->type),
+ GNUNET_h2s (&dm->key));
+#endif
+ }
+ transmit_status (client,
+ (GNUNET_SYSERR == ret) ? GNUNET_SYSERR : GNUNET_OK,
+ msg);
+ GNUNET_free_non_null (msg);
+ if (quota - reserved - cache_size < plugin->api->get_size (plugin->api->cls))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Need %llu bytes more space (%llu allowed, using %llu)\n"),
+ (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
+ (unsigned long long) (quota - reserved - cache_size),
+ (unsigned long long) plugin->api->get_size (plugin->api->cls));
+ manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+ }
+}
+
+
+
+/**
+ * Function that will check if the given datastore entry
+ * matches the put and if none match executes the put.
+ *
+ * @param cls closure, pointer to the client (of type 'struct PutContext').
+ * @param next_cls closure to use to ask for the next item
+ * @param key key for the content
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param type type of the content
+ * @param priority priority of the content
+ * @param anonymity anonymity-level for the content
+ * @param expiration expiration time for the content
+ * @param uid unique identifier for the datum;
+ * maybe 0 if no unique identifier is available
+ *
+ * @return GNUNET_SYSERR to abort the iteration, GNUNET_OK to continue,
+ * GNUNET_NO to delete the item and continue (if supported)
+ */
+static int
+check_present (void *cls,
+ void *next_cls,
+ const GNUNET_HashCode * key,
+ uint32_t size,
+ const void *data,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t priority,
+ uint32_t anonymity,
+ struct GNUNET_TIME_Absolute
+ expiration, uint64_t uid)
+{
+ struct PutContext *pc = cls;
+ const struct DataMessage *dm;
+
+ dm = (const struct DataMessage*) &pc[1];
+ if (key == NULL)
+ {
+ if (pc->is_present == GNUNET_YES)
+ transmit_status (pc->client, GNUNET_OK, NULL);
+ else
+ execute_put (pc->client, dm);
+ GNUNET_SERVER_client_drop (pc->client);
+ GNUNET_free (pc);
+ return GNUNET_SYSERR;
+ }
+ if ( (size == ntohl(dm->size)) &&
+ (0 == memcmp (&dm[1],
+ data,
+ size)) )
+ {
+ pc->is_present = GNUNET_YES;
+ plugin->api->next_request (next_cls, GNUNET_YES);
+ }
+ else
+ {
+ plugin->api->next_request (next_cls, GNUNET_NO);
+ }
+ return GNUNET_OK;
+}
+
+
/**
* Handle PUT-message.
*
const struct GNUNET_MessageHeader *message)
{
const struct DataMessage *dm = check_data (message);
- char *msg;
- int ret;
int rid;
struct ReservationList *pos;
+ struct PutContext *pc;
uint32_t size;
if ( (dm == NULL) ||
if (NULL != pos)
{
GNUNET_break (pos->entries > 0);
- GNUNET_break (pos->amount > size);
+ GNUNET_break (pos->amount >= size);
pos->entries--;
pos->amount -= size;
reserved -= (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
GNUNET_NO);
}
}
- msg = NULL;
- ret = plugin->api->put (plugin->api->cls,
- &dm->key,
- size,
- &dm[1],
- ntohl(dm->type),
- ntohl(dm->priority),
- ntohl(dm->anonymity),
- GNUNET_TIME_absolute_ntoh(dm->expiration),
- &msg);
- if (GNUNET_OK == ret)
+ if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (filter,
+ &dm->key))
{
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# bytes stored"),
- size,
- GNUNET_YES);
- GNUNET_CONTAINER_bloomfilter_add (filter,
- &dm->key);
-#if DEBUG_DATASTORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Successfully stored %u bytes of type %u under key `%s'\n",
- size,
- ntohl(dm->type),
- GNUNET_h2s (&dm->key));
-#endif
- }
- transmit_status (client,
- (GNUNET_SYSERR == ret) ? GNUNET_SYSERR : GNUNET_OK,
- msg);
- GNUNET_free_non_null (msg);
- if (quota - reserved - cache_size < plugin->api->get_size (plugin->api->cls))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Need %llu bytes more space (%llu allowed, using %llu)\n"),
- (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
- (unsigned long long) (quota - reserved - cache_size),
- (unsigned long long) plugin->api->get_size (plugin->api->cls));
- manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+ pc = GNUNET_malloc (sizeof (struct PutContext) + size + sizeof (struct DataMessage));
+ pc->client = client;
+ GNUNET_SERVER_client_keep (client);
+ memcpy (&pc[1], dm, size + sizeof (struct DataMessage));
+ plugin->api->get (plugin->api->cls,
+ &dm->key,
+ NULL,
+ ntohl (dm->type),
+ &check_present,
+ pc);
+ return;
}
+ execute_put (client, dm);
}
GNUNET_SCHEDULER_add_delayed (sched,
GNUNET_TIME_UNIT_FOREVER_REL,
&cleaning_task, NULL);
-
}