/*
This file is part of GNUnet
- (C) 2012 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2012, 2015 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
#define LOG_STRERROR_FILE(kind,op,fn) GNUNET_log_from_strerror_file (kind, "datacache-heap", op, fn)
+
/**
* Context for all functions in this plugin.
*/
*/
struct GNUNET_CONTAINER_HeapNode *hn;
+ /**
+ * Path information.
+ */
+ struct GNUNET_PeerIdentity *path_info;
+
/**
* Payload (actual payload follows this struct)
*/
size_t size;
+ /**
+ * Number of entries in @e path_info.
+ */
+ unsigned int path_info_len;
+
/**
* Type of the block.
*/
enum GNUNET_BLOCK_Type type;
-
+
};
+#define OVERHEAD (sizeof (struct Value) + 64)
+
+
/**
- * Closure for 'put_cb'.
+ * Closure for #put_cb().
*/
struct PutContext
{
/**
* Expiration time for the new value.
*/
- struct GNUNET_TIME_Absolute discard_time;
+ struct GNUNET_TIME_Absolute discard_time;
/**
* Data for the new value.
struct GNUNET_CONTAINER_Heap *heap;
/**
- * Number of bytes in 'data'.
+ * Path information.
+ */
+ const struct GNUNET_PeerIdentity *path_info;
+
+ /**
+ * Number of bytes in @e data.
*/
size_t size;
enum GNUNET_BLOCK_Type type;
/**
- * Value to set to GNUNET_YES if an equivalent block was found.
+ * Number of entries in @e path_info.
+ */
+ unsigned int path_info_len;
+
+ /**
+ * Value to set to #GNUNET_YES if an equivalent block was found.
*/
int found;
};
* Function called during PUT to detect if an equivalent block
* already exists.
*
- * @param cls the 'struct PutContext'
+ * @param cls the `struct PutContext`
* @param key the key for the value(s)
- * @param value an existing value
- * @return GNUNET_YES if not found (to continue to iterate)
+ * @param value an existing value
+ * @return #GNUNET_YES if not found (to continue to iterate)
*/
static int
put_cb (void *cls,
(val->type == put_ctx->type) &&
(0 == memcmp (&val[1], put_ctx->data, put_ctx->size)) )
{
- put_ctx->found = GNUNET_YES;
+ put_ctx->found = GNUNET_YES;
val->discard_time = GNUNET_TIME_absolute_max (val->discard_time,
put_ctx->discard_time);
+ /* replace old path with new path */
+ GNUNET_array_grow (val->path_info,
+ val->path_info_len,
+ put_ctx->path_info_len);
+ memcpy (val->path_info,
+ put_ctx->path_info,
+ put_ctx->path_info_len * sizeof (struct GNUNET_PeerIdentity));
GNUNET_CONTAINER_heap_update_cost (put_ctx->heap,
val->hn,
- val->discard_time.abs_value);
- return GNUNET_NO;
- }
- if (val->type == put_ctx->type)
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Got another value for key %s and type %d (size %u vs %u)\n",
+ val->discard_time.abs_value_us);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Got same value for key %s and type %d (size %u vs %u)\n",
GNUNET_h2s (key),
val->type,
(unsigned int) val->size,
(unsigned int) put_ctx->size);
+ return GNUNET_NO;
+ }
return GNUNET_YES;
}
/**
* Store an item in the datastore.
*
- * @param cls closure (our "struct Plugin")
+ * @param cls closure (our `struct Plugin`)
* @param key key to store data under
- * @param size number of bytes in data
+ * @param size number of bytes in @a data
* @param data data to store
* @param type type of the value
* @param discard_time when to discard the value in any case
- * @return 0 on error, number of bytes used otherwise
+ * @param path_info_len number of entries in @a path_info
+ * @param path_info a path through the network
+ * @return 0 if duplicate, -1 on error, number of bytes used otherwise
*/
-static size_t
-heap_plugin_put (void *cls, const struct GNUNET_HashCode * key, size_t size,
- const char *data, enum GNUNET_BLOCK_Type type,
- struct GNUNET_TIME_Absolute discard_time)
+static ssize_t
+heap_plugin_put (void *cls,
+ const struct GNUNET_HashCode *key,
+ size_t size,
+ const char *data,
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute discard_time,
+ unsigned int path_info_len,
+ const struct GNUNET_PeerIdentity *path_info)
{
struct Plugin *plugin = cls;
struct Value *val;
put_ctx.heap = plugin->heap;
put_ctx.data = data;
put_ctx.size = size;
+ put_ctx.path_info = path_info;
+ put_ctx.path_info_len = path_info_len;
put_ctx.discard_time = discard_time;
put_ctx.type = type;
GNUNET_CONTAINER_multihashmap_get_multiple (plugin->map,
key,
- put_cb,
+ &put_cb,
&put_ctx);
if (GNUNET_YES == put_ctx.found)
return 0;
val->type = type;
val->discard_time = discard_time;
val->size = size;
+ GNUNET_array_grow (val->path_info,
+ val->path_info_len,
+ path_info_len);
+ memcpy (val->path_info, path_info,
+ path_info_len * sizeof (struct GNUNET_PeerIdentity));
(void) GNUNET_CONTAINER_multihashmap_put (plugin->map,
&val->key,
val,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
val->hn = GNUNET_CONTAINER_heap_insert (plugin->heap,
val,
- val->discard_time.abs_value);
- return size;
+ val->discard_time.abs_value_us);
+ return size + OVERHEAD;
}
/**
- * Closure for 'get_cb'.
+ * Closure for #get_cb().
*/
struct GetContext
{
GNUNET_DATACACHE_Iterator iter;
/**
- * Closure for 'iter'.
+ * Closure for @e iter.
*/
void *iter_cls;
* Function called during GET to find matching blocks.
* Only matches by type.
*
- * @param cls the 'struct GetContext'
+ * @param cls the `struct GetContext`
* @param key the key for the value(s)
- * @param value an existing value
- * @return GNUNET_YES to continue to iterate
+ * @param value an existing value
+ * @return #GNUNET_YES to continue to iterate
*/
static int
get_cb (void *cls,
if ( (get_ctx->type != val->type) &&
(GNUNET_BLOCK_TYPE_ANY != get_ctx->type) )
return GNUNET_OK;
- ret = get_ctx->iter (get_ctx->iter_cls,
- val->discard_time,
- key,
- val->size,
- (const char *) &val[1],
- val->type);
-
+ if (NULL != get_ctx->iter)
+ ret = get_ctx->iter (get_ctx->iter_cls,
+ key,
+ val->size,
+ (const char *) &val[1],
+ val->type,
+ val->discard_time,
+ val->path_info_len,
+ val->path_info);
+ else
+ ret = GNUNET_YES;
get_ctx->cnt++;
return ret;
}
* Iterate over the results for a particular key
* in the datastore.
*
- * @param cls closure (our "struct Plugin")
+ * @param cls closure (our `struct Plugin`)
* @param key
* @param type entries of which type are relevant?
* @param iter maybe NULL (to just count)
- * @param iter_cls closure for iter
+ * @param iter_cls closure for @a iter
* @return the number of results found
*/
static unsigned int
-heap_plugin_get (void *cls, const struct GNUNET_HashCode * key,
- enum GNUNET_BLOCK_Type type, GNUNET_DATACACHE_Iterator iter,
- void *iter_cls)
+heap_plugin_get (void *cls,
+ const struct GNUNET_HashCode *key,
+ enum GNUNET_BLOCK_Type type,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
{
struct Plugin *plugin = cls;
struct GetContext get_ctx;
get_ctx.type = type;
get_ctx.iter = iter;
- get_ctx.iter_cls = iter_cls;
+ get_ctx.iter_cls = iter_cls;
get_ctx.cnt = 0;
GNUNET_CONTAINER_multihashmap_get_multiple (plugin->map,
key,
- get_cb,
+ &get_cb,
&get_ctx);
return get_ctx.cnt;
}
* Delete the entry with the lowest expiration value
* from the datacache right now.
*
- * @param cls closure (our "struct Plugin")
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @param cls closure (our `struct Plugin`)
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
static int
heap_plugin_del (void *cls)
{
struct Plugin *plugin = cls;
struct Value *val;
-
+
val = GNUNET_CONTAINER_heap_remove_root (plugin->heap);
if (NULL == val)
return GNUNET_SYSERR;
val));
plugin->env->delete_notify (plugin->env->cls,
&val->key,
- val->size);
+ val->size + OVERHEAD);
+ GNUNET_free_non_null (val->path_info);
GNUNET_free (val);
return GNUNET_OK;
}
+/**
+ * Return a random value from the datastore.
+ *
+ * @param cls closure (our `struct Plugin`)
+ * @param iter maybe NULL (to just count)
+ * @param iter_cls closure for @a iter
+ * @return the number of results found
+ */
+static unsigned int
+heap_plugin_get_random (void *cls,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
+{
+ struct Plugin *plugin = cls;
+ struct GetContext get_ctx;
+
+ get_ctx.type = GNUNET_BLOCK_TYPE_ANY;
+ get_ctx.iter = iter;
+ get_ctx.iter_cls = iter_cls;
+ get_ctx.cnt = 0;
+ GNUNET_CONTAINER_multihashmap_get_random (plugin->map,
+ &get_cb,
+ &get_ctx);
+ return get_ctx.cnt;
+}
+
+
+/**
+ * Iterate over the results that are "close" to a particular key in
+ * the datacache. "close" is defined as numerically larger than @a
+ * key (when interpreted as a circular address space), with small
+ * distance.
+ *
+ * @param cls closure (internal context for the plugin)
+ * @param key area of the keyspace to look into
+ * @param num_results number of results that should be returned to @a iter
+ * @param iter maybe NULL (to just count)
+ * @param iter_cls closure for @a iter
+ * @return the number of results found
+ */
+static unsigned int
+heap_plugin_get_closest (void *cls,
+ const struct GNUNET_HashCode *key,
+ unsigned int num_results,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
+{
+ GNUNET_break (0); // not implemented!
+ return 0;
+}
+
+
/**
* Entry point for the plugin.
*
- * @param cls closure (the "struct GNUNET_DATACACHE_PluginEnvironmnet")
- * @return the plugin's closure (our "struct Plugin")
+ * @param cls closure (the `struct GNUNET_DATACACHE_PluginEnvironmnet`)
+ * @return the plugin's closure (our `struct Plugin`)
*/
void *
libgnunet_plugin_datacache_heap_init (void *cls)
struct GNUNET_DATACACHE_PluginFunctions *api;
struct Plugin *plugin;
- plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin = GNUNET_new (struct Plugin);
plugin->map = GNUNET_CONTAINER_multihashmap_create (1024, /* FIXME: base on quota! */
GNUNET_YES);
plugin->heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
plugin->env = env;
- api = GNUNET_malloc (sizeof (struct GNUNET_DATACACHE_PluginFunctions));
+ api = GNUNET_new (struct GNUNET_DATACACHE_PluginFunctions);
api->cls = plugin;
api->get = &heap_plugin_get;
api->put = &heap_plugin_put;
api->del = &heap_plugin_del;
- LOG (GNUNET_ERROR_TYPE_INFO, _("Heap datacache running\n"));
+ api->get_random = &heap_plugin_get_random;
+ api->get_closest = &heap_plugin_get_closest;
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Heap datacache running\n"));
return api;
}
GNUNET_CONTAINER_multihashmap_remove (plugin->map,
&val->key,
val));
+ GNUNET_free_non_null (val->path_info);
GNUNET_free (val);
}
GNUNET_CONTAINER_heap_destroy (plugin->heap);
projects / oweals / gnunet.git / blobdiff