GNUnet  0.10.x
Data Structures | Macros | Functions | Variables
gnunet-service-datastore.c File Reference

Management for the datastore for files stored on a GNUnet node. More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_statistics_service.h"
#include "gnunet_datastore_plugin.h"
#include "datastore.h"
Include dependency graph for gnunet-service-datastore.c:

Go to the source code of this file.

Data Structures

struct  DatastorePlugin
 Our datastore plugin. More...
 
struct  ReservationList
 Linked list of active reservations. More...
 

Macros

#define MAX_PENDING   1024
 How many messages do we queue at most per client? More...
 
#define MAX_BF_SIZE   ((uint32_t) (1LL << 31))
 Limit size of bloom filter to 2 GB. More...
 
#define MAX_EXPIRE_DELAY   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
 How long are we at most keeping "expired" content past the expiration date in the database? More...
 
#define MIN_EXPIRE_DELAY   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
 How fast are we allowed to query the database for deleting expired content? (1 item per second). More...
 
#define MAX_STAT_SYNC_LAG   50
 After how many payload-changing operations do we sync our statistics? More...
 

Functions

static void sync_stats ()
 Synchronize our utilization statistics with the statistics service. More...
 
static void delete_expired (void *cls)
 Task that is used to remove expired entries from the datastore. More...
 
static int expired_processor (void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
 Iterate over the expired items stored in the datastore. More...
 
static int quota_processor (void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
 An iterator over a set of items stored in the datastore that deletes until we're happy with respect to our quota. More...
 
static void manage_space (unsigned long long need)
 Manage available disk space by running tasks that will discard content if necessary. More...
 
static void transmit_status (struct GNUNET_SERVICE_Client *client, int code, const char *msg)
 Transmit a status code to the client. More...
 
static int transmit_item (void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
 Function that will transmit the given datastore entry to the client. More...
 
static void handle_reserve (void *cls, const struct ReserveMessage *msg)
 Handle RESERVE-message. More...
 
static void handle_release_reserve (void *cls, const struct ReleaseReserveMessage *msg)
 Handle RELEASE_RESERVE-message. More...
 
static int check_data (const struct DataMessage *dm)
 Check that the given message is a valid data message. More...
 
static void put_continuation (void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
 Put continuation. More...
 
static int check_put (void *cls, const struct DataMessage *dm)
 Verify PUT-message. More...
 
static void handle_put (void *cls, const struct DataMessage *dm)
 Handle PUT-message. More...
 
static void handle_get (void *cls, const struct GetMessage *msg)
 Handle GNUNET_MESSAGE_TYPE_DATASTORE_GET-message. More...
 
static void handle_get_key (void *cls, const struct GetKeyMessage *msg)
 Handle GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY-message. More...
 
static void handle_get_replication (void *cls, const struct GNUNET_MessageHeader *message)
 Handle GET_REPLICATION-message. More...
 
static void handle_get_zero_anonymity (void *cls, const struct GetZeroAnonymityMessage *msg)
 Handle GET_ZERO_ANONYMITY-message. More...
 
static void remove_continuation (void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
 Remove continuation. More...
 
static int check_remove (void *cls, const struct DataMessage *dm)
 Verify REMOVE-message. More...
 
static void handle_remove (void *cls, const struct DataMessage *dm)
 Handle REMOVE-message. More...
 
static void handle_drop (void *cls, const struct GNUNET_MessageHeader *message)
 Handle DROP-message. More...
 
static void disk_utilization_change_cb (void *cls, int delta)
 Function called by plugins to notify us about a change in their disk utilization. More...
 
static int process_stat_in (void *cls, const char *subsystem, const char *name, uint64_t value, int is_persistent)
 Callback function to process statistic values. More...
 
static struct DatastorePluginload_plugin ()
 Load the datastore plugin. More...
 
static void unload_plugin (struct DatastorePlugin *plug)
 Function called when the service shuts down. More...
 
static void begin_service ()
 Initialization complete, start operating the service. More...
 
static void add_key_to_bloomfilter (void *cls, const struct GNUNET_HashCode *key, unsigned int count)
 Adds a given key to the bloomfilter in cls count times. More...
 
static void process_stat_done (void *cls, int success)
 We finished receiving the statistic. More...
 
static void stat_timeout (void *cls)
 Fetching stats took to long, run without. More...
 
static void cleaning_task (void *cls)
 Task run during shutdown. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 Add a client to our list of active clients. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
 Called whenever a client is disconnected. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *serv)
 Process datastore requests. More...
 
 GNUNET_SERVICE_MAIN ("datastore", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(reserve, GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE, struct ReserveMessage, NULL), GNUNET_MQ_hd_fixed_size(release_reserve, GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE, struct ReleaseReserveMessage, NULL), GNUNET_MQ_hd_var_size(put, GNUNET_MESSAGE_TYPE_DATASTORE_PUT, struct DataMessage, NULL), GNUNET_MQ_hd_fixed_size(get, GNUNET_MESSAGE_TYPE_DATASTORE_GET, struct GetMessage, NULL), GNUNET_MQ_hd_fixed_size(get_key, GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY, struct GetKeyMessage, NULL), GNUNET_MQ_hd_fixed_size(get_replication, GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_hd_fixed_size(get_zero_anonymity, GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY, struct GetZeroAnonymityMessage, NULL), GNUNET_MQ_hd_var_size(remove, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE, struct DataMessage, NULL), GNUNET_MQ_hd_fixed_size(drop, GNUNET_MESSAGE_TYPE_DATASTORE_DROP, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static char * quota_stat_name
 Name under which we store current space consumption. More...
 
static struct GNUNET_SCHEDULER_Taskstat_timeout_task
 Task to timeout stat GET. More...
 
static struct DatastorePluginplugin
 Our datastore plugin (NULL if not available). More...
 
static struct ReservationListreservations
 Linked list of space reservations made by clients. More...
 
static struct GNUNET_CONTAINER_BloomFilterfilter
 Bloomfilter to quickly tell if we don't have the content. More...
 
static char * plugin_name
 Name of our plugin. More...
 
static const struct GNUNET_CONFIGURATION_Handlecfg
 Our configuration. More...
 
static struct GNUNET_STATISTICS_Handlestats
 Handle for reporting statistics. More...
 
static unsigned long long cache_size
 How much space are we using for the cache? (space available for insertions that will be instantly reclaimed by discarding less important content — or possibly whatever we just inserted into the "cache"). More...
 
static unsigned long long reserved
 How much space have we currently reserved? More...
 
static unsigned long long payload
 How much data are we currently storing in the database? More...
 
static struct GNUNET_SCHEDULER_Taskexpired_kill_task
 Identity of the task that is used to delete expired content. More...
 
static struct GNUNET_TIME_Absolute min_expiration
 Minimum time that content should have to not be discarded instantly (time stamp of any content that we've been discarding recently to stay below the quota). More...
 
static unsigned long long quota
 How much space are we allowed to use? More...
 
static int do_drop
 Should the database be dropped on exit? More...
 
static int refresh_bf
 Should we refresh the BF when the DB is loaded? More...
 
static unsigned int last_sync
 Number of updates that were made to the payload value since we last synchronized it with the statistics service. More...
 
static int stats_worked
 Did we get an answer from statistics? More...
 
static int cleaning_done
 Have we already cleaned up the TCCs and are hence no longer willing (or able) to transmit anything to anyone? More...
 
static struct GNUNET_STATISTICS_GetHandlestat_get
 Handle for pending get request. More...
 
static struct GNUNET_SERVICE_Handleservice
 Handle to our server. More...
 

Detailed Description

Management for the datastore for files stored on a GNUnet node.

Author
Christian Grothoff

Definition in file gnunet-service-datastore.c.

Macro Definition Documentation

◆ MAX_PENDING

#define MAX_PENDING   1024

How many messages do we queue at most per client?

Definition at line 37 of file gnunet-service-datastore.c.

◆ MAX_BF_SIZE

#define MAX_BF_SIZE   ((uint32_t) (1LL << 31))

Limit size of bloom filter to 2 GB.

Definition at line 42 of file gnunet-service-datastore.c.

Referenced by run().

◆ MAX_EXPIRE_DELAY

#define MAX_EXPIRE_DELAY   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)

How long are we at most keeping "expired" content past the expiration date in the database?

Definition at line 48 of file gnunet-service-datastore.c.

Referenced by expired_processor().

◆ MIN_EXPIRE_DELAY

#define MIN_EXPIRE_DELAY   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)

How fast are we allowed to query the database for deleting expired content? (1 item per second).

Definition at line 54 of file gnunet-service-datastore.c.

Referenced by expired_processor().

◆ MAX_STAT_SYNC_LAG

#define MAX_STAT_SYNC_LAG   50

After how many payload-changing operations do we sync our statistics?

Definition at line 70 of file gnunet-service-datastore.c.

Referenced by disk_utilization_change_cb().

Function Documentation

◆ sync_stats()

static void sync_stats ( )
static

Synchronize our utilization statistics with the statistics service.

Definition at line 235 of file gnunet-service-datastore.c.

References GNUNET_NO, GNUNET_STATISTICS_set(), GNUNET_YES, last_sync, payload, and quota_stat_name.

Referenced by cleaning_task(), and disk_utilization_change_cb().

236 {
239  payload,
240  GNUNET_YES);
242  "# utilization by current datastore",
243  payload,
244  GNUNET_NO);
245  last_sync = 0;
246 }
#define GNUNET_NO
Definition: gnunet_common.h:81
static char * quota_stat_name
Name under which we store current space consumption.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
static unsigned int last_sync
Number of updates that were made to the payload value since we last synchronized it with the statisti...
static unsigned long long payload
How much data are we currently storing in the database?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_YES
Definition: gnunet_common.h:80
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◆ delete_expired()

static void delete_expired ( void *  cls)
static

Task that is used to remove expired entries from the datastore.

This task will schedule itself again automatically to always delete all expired content quickly.

Parameters
clsnot used

Definition at line 359 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, expired_processor(), and GNUNET_DATASTORE_PluginFunctions::get_expiration.

Referenced by begin_service(), and expired_processor().

360 {
361  expired_kill_task = NULL;
364  NULL);
365 }
PluginGetRandom get_expiration
Function to get a random expired item or, if none are expired, either the oldest entry or one with a ...
static struct GNUNET_SCHEDULER_Task * expired_kill_task
Identity of the task that is used to delete expired content.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static int expired_processor(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
Iterate over the expired items stored in the datastore.
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
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◆ expired_processor()

static int expired_processor ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
const void *  data,
enum GNUNET_BLOCK_Type  type,
uint32_t  priority,
uint32_t  anonymity,
uint32_t  replication,
struct GNUNET_TIME_Absolute  expiration,
uint64_t  uid 
)
static

Iterate over the expired items stored in the datastore.

Delete all expired items; once we have processed all expired items, re-schedule the "delete_expired" task.

Parameters
clsnot used
keykey for the content
sizenumber of bytes in data
datacontent stored
typetype of the content
prioritypriority of the content
anonymityanonymity-level for the content
replicationreplication-level for the content
expirationexpiration time for the content
uidunique identifier for the datum; maybe 0 if no unique identifier is available
Returns
GNUNET_SYSERR to abort the iteration, GNUNET_OK to continue (continue on call to "next", of course), GNUNET_NO to delete the item and continue (if supported)

Definition at line 299 of file gnunet-service-datastore.c.

References GNUNET_TIME_Absolute::abs_value_us, delete_expired(), gettext_noop, GNUNET_CONTAINER_bloomfilter_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_SCHEDULER_add_delayed_with_priority(), GNUNET_SCHEDULER_PRIORITY_IDLE, GNUNET_STATISTICS_update(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_SYSERR, GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_difference(), GNUNET_YES, MAX_EXPIRE_DELAY, min_expiration, and MIN_EXPIRE_DELAY.

Referenced by delete_expired().

309 {
310  struct GNUNET_TIME_Absolute now;
311 
312  if (NULL == key)
313  {
317  &delete_expired, NULL);
318  return GNUNET_SYSERR;
319  }
320  now = GNUNET_TIME_absolute_get ();
321  if (expiration.abs_value_us > now.abs_value_us)
322  {
323  /* finished processing */
327  &delete_expired, NULL);
328  return GNUNET_SYSERR;
329  }
331  "Deleting content `%s' of type %u that expired %s ago\n",
332  GNUNET_h2s (key), type,
334  now),
335  GNUNET_YES));
336  min_expiration = now;
338  gettext_noop ("# bytes expired"),
339  size,
340  GNUNET_YES);
345  &delete_expired, NULL);
346  return GNUNET_NO;
347 }
static struct GNUNET_TIME_Absolute min_expiration
Minimum time that content should have to not be discarded instantly (time stamp of any content that w...
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1178
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
uint64_t abs_value_us
The actual value.
#define MAX_EXPIRE_DELAY
How long are we at most keeping "expired" content past the expiration date in the database...
void GNUNET_CONTAINER_bloomfilter_remove(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Remove an element from the filter.
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:727
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
static struct GNUNET_SCHEDULER_Task * expired_kill_task
Identity of the task that is used to delete expired content.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
Run when otherwise idle.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static unsigned int size
Size of the "table".
Definition: peer.c:67
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_log(kind,...)
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
Time for absolute times used by GNUnet, in microseconds.
#define GNUNET_YES
Definition: gnunet_common.h:80
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_difference(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Absolute end)
Compute the time difference between the given start and end times.
Definition: time.c:353
#define MIN_EXPIRE_DELAY
How fast are we allowed to query the database for deleting expired content? (1 item per second)...
static void delete_expired(void *cls)
Task that is used to remove expired entries from the datastore.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ quota_processor()

static int quota_processor ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
const void *  data,
enum GNUNET_BLOCK_Type  type,
uint32_t  priority,
uint32_t  anonymity,
uint32_t  replication,
struct GNUNET_TIME_Absolute  expiration,
uint64_t  uid 
)
static

An iterator over a set of items stored in the datastore that deletes until we're happy with respect to our quota.

Parameters
clsclosure
keykey for the content
sizenumber of bytes in data
datacontent stored
typetype of the content
prioritypriority of the content
anonymityanonymity-level for the content
replicationreplication-level for the content
expirationexpiration time for the content
uidunique identifier for the datum; maybe 0 if no unique identifier is available
Returns
GNUNET_SYSERR to abort the iteration, GNUNET_OK to continue (continue on call to "next", of course), GNUNET_NO to delete the item and continue (if supported)

Definition at line 388 of file gnunet-service-datastore.c.

References expiration, gettext_noop, GNUNET_CONTAINER_bloomfilter_remove(), GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_SYSERR, GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_YES, and min_expiration.

Referenced by manage_space().

398 {
399  unsigned long long *need = cls;
400 
401  if (NULL == key)
402  return GNUNET_SYSERR;
404  "Deleting %llu bytes of low-priority (%u) content `%s' of type %u at %s prior to expiration (still trying to free another %llu bytes)\n",
405  (unsigned long long) (size + GNUNET_DATASTORE_ENTRY_OVERHEAD),
406  (unsigned int) priority,
407  GNUNET_h2s (key), type,
409  GNUNET_YES),
410  *need);
412  *need = 0;
413  else
415  if (priority > 0)
417  else
420  gettext_noop ("# bytes purged (low-priority)"),
421  size, GNUNET_YES);
423  return GNUNET_NO;
424 }
static struct GNUNET_TIME_Absolute min_expiration
Minimum time that content should have to not be discarded instantly (time stamp of any content that w...
static char * expiration
Credential TTL.
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
void GNUNET_CONTAINER_bloomfilter_remove(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Remove an element from the filter.
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:727
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static unsigned int size
Size of the "table".
Definition: peer.c:67
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_log(kind,...)
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:331
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
#define GNUNET_YES
Definition: gnunet_common.h:80
#define gettext_noop(String)
Definition: gettext.h:69
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◆ manage_space()

static void manage_space ( unsigned long long  need)
static

Manage available disk space by running tasks that will discard content if necessary.

This function will be run whenever a request for "need" bytes of storage could only be satisfied by eating into the "cache" (and we want our cache space back).

Parameters
neednumber of bytes of content that were placed into the "cache" (and hence the number of bytes that should be removed).

Definition at line 440 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::get_expiration, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, and quota_processor().

Referenced by put_continuation().

441 {
442  unsigned long long last;
443 
445  "Asked to free up %llu bytes of cache space\n",
446  need);
447  last = 0;
448  while ((need > 0) && (last != need))
449  {
450  last = need;
453  &need);
454  }
455 }
static int quota_processor(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
An iterator over a set of items stored in the datastore that deletes until we&#39;re happy with respect t...
PluginGetRandom get_expiration
Function to get a random expired item or, if none are expired, either the oldest entry or one with a ...
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
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◆ transmit_status()

static void transmit_status ( struct GNUNET_SERVICE_Client client,
int  code,
const char *  msg 
)
static

Transmit a status code to the client.

Parameters
clientreceiver of the response
codestatus code
msgoptional error message (can be NULL)

Definition at line 466 of file gnunet-service-datastore.c.

References DatastorePlugin::env, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_DATASTORE_STATUS, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_SERVICE_client_get_mq(), GNUNET_TIME_absolute_hton(), StatusMessage::min_expiration, min_expiration, and StatusMessage::status.

Referenced by handle_release_reserve(), handle_reserve(), put_continuation(), and remove_continuation().

469 {
470  struct GNUNET_MQ_Envelope *env;
471  struct StatusMessage *sm;
472  size_t slen;
473 
475  "Transmitting `%s' message with value %d and message `%s'\n",
476  "STATUS", code, msg != NULL ? msg : "(none)");
477  slen = (msg == NULL) ? 0 : strlen (msg) + 1;
478  env = GNUNET_MQ_msg_extra (sm,
479  slen,
481  sm->status = htonl (code);
483  GNUNET_memcpy (&sm[1],
484  msg,
485  slen);
487  env);
488 }
#define GNUNET_MESSAGE_TYPE_DATASTORE_STATUS
Message sent by datastore to client informing about status processing a request (in response to RESER...
static struct GNUNET_TIME_Absolute min_expiration
Minimum time that content should have to not be discarded instantly (time stamp of any content that w...
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2734
struct GNUNET_TIME_AbsoluteNBO min_expiration
Minimum expiration time required for content to be stored by the datacache at this time...
Definition: datastore.h:80
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
#define GNUNET_memcpy(dst, src, n)
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_log(kind,...)
Message from datastore service informing client about the success or failure of a requested operation...
Definition: datastore.h:64
int32_t status
Status code, -1 for errors.
Definition: datastore.h:74
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:353
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:654
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◆ transmit_item()

static int transmit_item ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
const void *  data,
enum GNUNET_BLOCK_Type  type,
uint32_t  priority,
uint32_t  anonymity,
uint32_t  replication,
struct GNUNET_TIME_Absolute  expiration,
uint64_t  uid 
)
static

Function that will transmit the given datastore entry to the client.

Parameters
clsclosure, pointer to the client (of type struct GNUNET_SERVICE_Client).
keykey for the content
sizenumber of bytes in data
datacontent stored
typetype of the content
prioritypriority of the content
anonymityanonymity-level for the content
replicationreplication-level for the content
expirationexpiration time for the content
uidunique identifier for the datum; maybe 0 if no unique identifier is available
Returns
GNUNET_SYSERR to abort the iteration, GNUNET_OK to continue, GNUNET_NO to delete the item and continue (if supported)

Definition at line 510 of file gnunet-service-datastore.c.

References DataMessage::anonymity, end, DatastorePlugin::env, DataMessage::expiration, gettext_noop, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_htonll(), GNUNET_log, GNUNET_MAX_MESSAGE_SIZE, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_DATASTORE_DATA, GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END, GNUNET_MQ_msg, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_get_mq(), GNUNET_STATISTICS_update(), GNUNET_STRINGS_absolute_time_to_string(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_absolute_hton(), GNUNET_YES, key, DataMessage::key, DataMessage::priority, DataMessage::replication, DataMessage::rid, DataMessage::size, DataMessage::type, and DataMessage::uid.

Referenced by handle_get(), handle_get_key(), handle_get_replication(), and handle_get_zero_anonymity().

520 {
521  struct GNUNET_SERVICE_Client *client = cls;
522  struct GNUNET_MQ_Envelope *env;
523  struct GNUNET_MessageHeader *end;
524  struct DataMessage *dm;
525 
526  if (NULL == key)
527  {
528  /* transmit 'DATA_END' */
530  "Transmitting DATA_END message\n");
531  env = GNUNET_MQ_msg (end,
534  env);
535  return GNUNET_OK;
536  }
537  GNUNET_assert (sizeof (struct DataMessage) + size <
539  env = GNUNET_MQ_msg_extra (dm,
540  size,
542  dm->rid = htonl (0);
543  dm->size = htonl (size);
544  dm->type = htonl (type);
545  dm->priority = htonl (priority);
546  dm->anonymity = htonl (anonymity);
547  dm->replication = htonl (replication);
548  dm->expiration = GNUNET_TIME_absolute_hton (expiration);
549  dm->uid = GNUNET_htonll (uid);
550  dm->key = *key;
551  GNUNET_memcpy (&dm[1],
552  data,
553  size);
555  "Transmitting DATA message for `%s' of type %u with expiration %s (in: %s)\n",
556  GNUNET_h2s (key),
557  type,
560  GNUNET_YES));
562  gettext_noop ("# results found"),
563  1,
564  GNUNET_NO);
566  env);
567  return GNUNET_OK;
568 }
static int end
Set if we are to shutdown all services (including ARM).
Definition: gnunet-arm.c:34
struct GNUNET_TIME_AbsoluteNBO expiration
Expiration time (NBO); zero for remove.
Definition: datastore.h:252
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2734
uint32_t type
Type of the item (NBO), zero for remove, (actually an enum GNUNET_BLOCK_Type)
Definition: datastore.h:219
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static unsigned int replication
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Handle to a client that is connected to a service.
Definition: service.c:249
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
#define GNUNET_memcpy(dst, src, n)
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:727
#define GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END
Message sent by datastore to client signaling end of matching data.
uint32_t replication
Desired replication level.
Definition: datastore.h:234
uint32_t rid
Reservation ID to use; use zero for none.
Definition: datastore.h:209
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:35
Message transmitting content from or to the datastore service.
Definition: datastore.h:196
struct GNUNET_HashCode key
The key used in the DHT.
static unsigned int size
Size of the "table".
Definition: peer.c:67
uint32_t size
Number of bytes in the item (NBO).
Definition: datastore.h:214
uint32_t anonymity
Desired anonymity level (NBO), zero for remove.
Definition: datastore.h:229
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message...
uint64_t uid
Unique ID for the content (can be used for UPDATE); can be zero for remove (which indicates that the ...
Definition: datastore.h:247
struct GNUNET_HashCode key
Key under which the item can be found.
Definition: datastore.h:257
uint32_t priority
Priority of the item (NBO), zero for remove.
Definition: datastore.h:224
#define GNUNET_log(kind,...)
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:331
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
Header for all communications.
#define GNUNET_YES
Definition: gnunet_common.h:80
static unsigned int anonymity
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:353
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:792
uint32_t data
The data value.
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:654
#define GNUNET_MESSAGE_TYPE_DATASTORE_DATA
Message sent by datastore to client providing requested data (in response to GET or GET_RANDOM reques...
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_reserve()

static void handle_reserve ( void *  cls,
const struct ReserveMessage msg 
)
static

Handle RESERVE-message.

Parameters
clsidentification of the client
messagethe actual message

Static counter to produce reservation identifiers.

Definition at line 578 of file gnunet-service-datastore.c.

References _, ReserveMessage::amount, ReservationList::amount, cache_size, ReservationList::client, e, ReserveMessage::entries, entries, ReservationList::entries, gettext_noop, GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_new, GNUNET_NO, GNUNET_ntohll(), GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_set(), ReservationList::next, payload, quota, reservations, reserved, ReservationList::rid, and transmit_status().

580 {
584  static int reservation_gen;
585  struct GNUNET_SERVICE_Client *client = cls;
586  struct ReservationList *e;
587  unsigned long long used;
588  unsigned long long req;
589  uint64_t amount;
590  uint32_t entries;
591 
593  "Processing RESERVE request\n");
594  amount = GNUNET_ntohll (msg->amount);
595  entries = ntohl (msg->entries);
596  used = payload + reserved;
597  req = amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * entries;
598  if (used + req > quota)
599  {
600  if (quota < used)
601  used = quota; /* cheat a bit for error message (to avoid negative numbers) */
603  _("Insufficient space (%llu bytes are available) to satisfy RESERVE request for %llu bytes\n"),
604  quota - used,
605  req);
606  if (cache_size < req)
607  {
608  /* TODO: document this in the FAQ; essentially, if this
609  * message happens, the insertion request could be blocked
610  * by less-important content from migration because it is
611  * larger than 1/8th of the overall available space, and
612  * we only reserve 1/8th for "fresh" insertions */
614  _("The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"),
615  req,
616  cache_size);
618  0,
620  ("Insufficient space to satisfy request and "
621  "requested amount is larger than cache size"));
622  }
623  else
624  {
626  0,
627  gettext_noop ("Insufficient space to satisfy request"));
628  }
630  return;
631  }
632  reserved += req;
634  gettext_noop ("# reserved"),
635  reserved,
636  GNUNET_NO);
637  e = GNUNET_new (struct ReservationList);
638  e->next = reservations;
639  reservations = e;
640  e->client = client;
641  e->amount = amount;
642  e->entries = entries;
643  e->rid = ++reservation_gen;
644  if (reservation_gen < 0)
645  reservation_gen = 0; /* wrap around */
647  e->rid,
648  NULL);
650 }
uint32_t entries
Number of items to reserve.
Definition: datastore.h:49
uint64_t amount
Number of bytes (still) reserved.
static struct Experiment * e
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
Handle to a client that is connected to a service.
Definition: service.c:249
static struct ReservationList * reservations
Linked list of space reservations made by clients.
struct ListEntry * entries
List of peers in the list.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
static unsigned long long payload
How much data are we currently storing in the database?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
static unsigned long long quota
How much space are we allowed to use?
static unsigned long long cache_size
How much space are we using for the cache? (space available for insertions that will be instantly rec...
#define GNUNET_log(kind,...)
static void transmit_status(struct GNUNET_SERVICE_Client *client, int code, const char *msg)
Transmit a status code to the client.
static unsigned long long reserved
How much space have we currently reserved?
struct GNUNET_SERVICE_Client * client
Client that made the reservation.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
Linked list of active reservations.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
#define gettext_noop(String)
Definition: gettext.h:69
uint64_t amount
Number of bytes to reserve.
Definition: datastore.h:54
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◆ handle_release_reserve()

static void handle_release_reserve ( void *  cls,
const struct ReleaseReserveMessage msg 
)
static

Handle RELEASE_RESERVE-message.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 660 of file gnunet-service-datastore.c.

References ReservationList::amount, ReservationList::entries, gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_set(), GNUNET_SYSERR, ReservationList::next, reservations, reserved, ReleaseReserveMessage::rid, ReservationList::rid, and transmit_status().

662 {
663  struct GNUNET_SERVICE_Client *client = cls;
664  struct ReservationList *pos;
665  struct ReservationList *prev;
666  struct ReservationList *next;
667  int rid = ntohl (msg->rid);
668  unsigned long long rem;
669 
671  "Processing RELEASE_RESERVE request\n");
672  next = reservations;
673  prev = NULL;
674  while (NULL != (pos = next))
675  {
676  next = pos->next;
677  if (rid == pos->rid)
678  {
679  if (prev == NULL)
680  reservations = next;
681  else
682  prev->next = next;
683  rem =
684  pos->amount +
685  ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries;
686  GNUNET_assert (reserved >= rem);
687  reserved -= rem;
689  gettext_noop ("# reserved"),
690  reserved,
691  GNUNET_NO);
693  "Returning %llu remaining reserved bytes to storage pool\n",
694  rem);
695  GNUNET_free (pos);
696  transmit_status (client,
697  GNUNET_OK,
698  NULL);
700  return;
701  }
702  prev = pos;
703  }
704  GNUNET_break (0);
705  transmit_status (client,
707  gettext_noop ("Could not find matching reservation"));
709 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
uint64_t amount
Number of bytes (still) reserved.
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Handle to a client that is connected to a service.
Definition: service.c:249
int32_t rid
Reservation identifier.
static struct ReservationList * reservations
Linked list of space reservations made by clients.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
struct ReservationList * next
This is a linked list.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
uint64_t entries
Number of items (still) reserved.
int32_t rid
Reservation id.
Definition: datastore.h:100
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_log(kind,...)
static void transmit_status(struct GNUNET_SERVICE_Client *client, int code, const char *msg)
Transmit a status code to the client.
static unsigned long long reserved
How much space have we currently reserved?
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
Linked list of active reservations.
#define GNUNET_free(ptr)
Wrapper around free.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ check_data()

static int check_data ( const struct DataMessage dm)
static

Check that the given message is a valid data message.

Parameters
dmmessage to check
Returns
GNUNET_SYSERR is not well-formed, otherwise GNUNET_OK

Definition at line 719 of file gnunet-service-datastore.c.

References GNUNET_break, GNUNET_OK, GNUNET_SYSERR, DataMessage::header, size, DataMessage::size, and GNUNET_MessageHeader::size.

Referenced by check_put(), and check_remove().

720 {
721  uint16_t size;
722  uint32_t dsize;
723 
724  size = ntohs (dm->header.size);
725  dsize = ntohl (dm->size);
726  if (size != dsize + sizeof (struct DataMessage))
727  {
728  GNUNET_break (0);
729  return GNUNET_SYSERR;
730  }
731  return GNUNET_OK;
732 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Message transmitting content from or to the datastore service.
Definition: datastore.h:196
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static unsigned int size
Size of the "table".
Definition: peer.c:67
uint32_t size
Number of bytes in the item (NBO).
Definition: datastore.h:214
struct GNUNET_MessageHeader header
Type is either GNUNET_MESSAGE_TYPE_DATASTORE_PUT, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE or GNUNET_MESS...
Definition: datastore.h:204
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◆ put_continuation()

static void put_continuation ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
int  status,
const char *  msg 
)
static

Put continuation.

Parameters
clsclosure
keykey for the item stored
sizesize of the item stored
statusGNUNET_OK if inserted, GNUNET_NO if updated, or #GNUNET_SYSERROR if error
msgerror message on error

Definition at line 746 of file gnunet-service-datastore.c.

References _, cache_size, gettext_noop, GNUNET_CONTAINER_bloomfilter_add(), GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_INFO, GNUNET_h2s(), GNUNET_log, GNUNET_OK, GNUNET_STATISTICS_update(), GNUNET_SYSERR, GNUNET_YES, manage_space(), payload, quota, reserved, and transmit_status().

Referenced by handle_put().

751 {
752  struct GNUNET_SERVICE_Client *client = cls;
753 
754  if (GNUNET_OK == status)
755  {
757  gettext_noop ("# bytes stored"),
758  size,
759  GNUNET_YES);
761  key);
763  "Successfully stored %u bytes under key `%s'\n",
764  size,
765  GNUNET_h2s (key));
766  }
767  transmit_status (client,
769  msg);
770  if (quota - reserved - cache_size < payload)
771  {
773  _("Need %llu bytes more space (%llu allowed, using %llu)\n"),
774  (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
775  (unsigned long long) (quota - reserved - cache_size),
776  (unsigned long long) payload);
778  }
779 }
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
void GNUNET_CONTAINER_bloomfilter_add(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Add an element to the filter.
static void manage_space(unsigned long long need)
Manage available disk space by running tasks that will discard content if necessary.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
Handle to a client that is connected to a service.
Definition: service.c:249
uint16_t status
See PRISM_STATUS_*-constants.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static unsigned int size
Size of the "table".
Definition: peer.c:67
static unsigned long long payload
How much data are we currently storing in the database?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
static unsigned long long quota
How much space are we allowed to use?
static unsigned long long cache_size
How much space are we using for the cache? (space available for insertions that will be instantly rec...
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
static void transmit_status(struct GNUNET_SERVICE_Client *client, int code, const char *msg)
Transmit a status code to the client.
static unsigned long long reserved
How much space have we currently reserved?
#define gettext_noop(String)
Definition: gettext.h:69
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◆ check_put()

static int check_put ( void *  cls,
const struct DataMessage dm 
)
static

Verify PUT-message.

Parameters
clsidentification of the client
messagethe actual message
Returns
GNUNET_OK if dm is well-formed

Definition at line 790 of file gnunet-service-datastore.c.

References check_data(), GNUNET_break, GNUNET_OK, and GNUNET_SYSERR.

792 {
793  if (GNUNET_OK != check_data (dm))
794  {
795  GNUNET_break (0);
796  return GNUNET_SYSERR;
797  }
798  return GNUNET_OK;
799 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static int check_data(const struct DataMessage *dm)
Check that the given message is a valid data message.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
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◆ handle_put()

static void handle_put ( void *  cls,
const struct DataMessage dm 
)
static

Handle PUT-message.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 809 of file gnunet-service-datastore.c.

References ReservationList::amount, DataMessage::anonymity, DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, ReservationList::entries, DataMessage::expiration, gettext_noop, GNUNET_break, GNUNET_CONTAINER_bloomfilter_test(), GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_set(), GNUNET_TIME_absolute_ntoh(), DataMessage::key, ReservationList::next, DataMessage::priority, GNUNET_DATASTORE_PluginFunctions::put, put_continuation(), DataMessage::replication, reservations, reserved, ReservationList::rid, DataMessage::rid, size, DataMessage::size, and DataMessage::type.

811 {
812  struct GNUNET_SERVICE_Client *client = cls;
813  int rid;
814  struct ReservationList *pos;
815  uint32_t size;
816 
818  "Processing PUT request for `%s' of type %u\n",
819  GNUNET_h2s (&dm->key),
820  (uint32_t) ntohl (dm->type));
821  rid = ntohl (dm->rid);
822  size = ntohl (dm->size);
823  if (rid > 0)
824  {
825  pos = reservations;
826  while ((NULL != pos) && (rid != pos->rid))
827  pos = pos->next;
828  GNUNET_break (pos != NULL);
829  if (NULL != pos)
830  {
831  GNUNET_break (pos->entries > 0);
832  GNUNET_break (pos->amount >= size);
833  pos->entries--;
834  pos->amount -= size;
837  gettext_noop ("# reserved"),
838  reserved,
839  GNUNET_NO);
840  }
841  }
843  &dm->key);
844  plugin->api->put (plugin->api->cls,
845  &dm->key,
846  absent,
847  ntohl (dm->size),
848  &dm[1],
849  ntohl (dm->type),
850  ntohl (dm->priority),
851  ntohl (dm->anonymity),
852  ntohl (dm->replication),
855  client);
857 }
PluginPut put
Function to store an item in the datastore.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:670
struct GNUNET_TIME_AbsoluteNBO expiration
Expiration time (NBO); zero for remove.
Definition: datastore.h:252
uint32_t type
Type of the item (NBO), zero for remove, (actually an enum GNUNET_BLOCK_Type)
Definition: datastore.h:219
uint64_t amount
Number of bytes (still) reserved.
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Handle to a client that is connected to a service.
Definition: service.c:249
int32_t rid
Reservation identifier.
int GNUNET_CONTAINER_bloomfilter_test(const struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Test if an element is in the filter.
static struct ReservationList * reservations
Linked list of space reservations made by clients.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
uint32_t replication
Desired replication level.
Definition: datastore.h:234
uint32_t rid
Reservation ID to use; use zero for none.
Definition: datastore.h:209
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
struct ReservationList * next
This is a linked list.
static unsigned int size
Size of the "table".
Definition: peer.c:67
uint32_t size
Number of bytes in the item (NBO).
Definition: datastore.h:214
uint32_t anonymity
Desired anonymity level (NBO), zero for remove.
Definition: datastore.h:229
uint64_t entries
Number of items (still) reserved.
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
struct GNUNET_HashCode key
Key under which the item can be found.
Definition: datastore.h:257
uint32_t priority
Priority of the item (NBO), zero for remove.
Definition: datastore.h:224
static void put_continuation(void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
Put continuation.
#define GNUNET_log(kind,...)
static unsigned long long reserved
How much space have we currently reserved?
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
Linked list of active reservations.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_get()

static void handle_get ( void *  cls,
const struct GetMessage msg 
)
static

Handle GNUNET_MESSAGE_TYPE_DATASTORE_GET-message.

Parameters
clsidentification of the client
msgthe actual message

Definition at line 867 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::get_key, gettext_noop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_ntohll(), GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GetMessage::next_uid, GetMessage::random, transmit_item(), and GetMessage::type.

869 {
870  struct GNUNET_SERVICE_Client *client = cls;
871 
873  "Processing GET request of type %u\n",
874  (uint32_t) ntohl (msg->type));
876  gettext_noop ("# GET requests received"),
877  1,
878  GNUNET_NO);
880  GNUNET_ntohll (msg->next_uid),
881  msg->random,
882  NULL,
883  ntohl (msg->type),
884  &transmit_item,
885  client);
887 }
static int transmit_item(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
Function that will transmit the given datastore entry to the client.
uint32_t random
If true return a random result.
Definition: datastore.h:163
#define GNUNET_NO
Definition: gnunet_common.h:81
uint64_t next_uid
UID at which to start the search.
Definition: datastore.h:158
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Handle to a client that is connected to a service.
Definition: service.c:249
uint32_t type
Desired content type.
Definition: datastore.h:153
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
PluginGetKey get_key
Get a particular datum matching a given hash from the datastore.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_get_key()

static void handle_get_key ( void *  cls,
const struct GetKeyMessage msg 
)
static

Handle GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY-message.

Parameters
clsclosure
msgthe actual message

Definition at line 897 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::get_key, gettext_noop, GNUNET_CONTAINER_bloomfilter_test(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_ntohll(), GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_YES, GetKeyMessage::key, GetKeyMessage::next_uid, GetKeyMessage::random, transmit_item(), and GetKeyMessage::type.

899 {
900  struct GNUNET_SERVICE_Client *client = cls;
901 
903  "Processing GET request for `%s' of type %u\n",
904  GNUNET_h2s (&msg->key),
905  (uint32_t) ntohl (msg->type));
907  gettext_noop ("# GET KEY requests received"),
908  1,
909  GNUNET_NO);
910  if (GNUNET_YES !=
912  &msg->key))
913  {
914  /* don't bother database... */
916  "Empty result set for GET request for `%s' (bloomfilter).\n",
917  GNUNET_h2s (&msg->key));
920  ("# requests filtered by bloomfilter"),
921  1,
922  GNUNET_NO);
923  transmit_item (client,
924  NULL, 0, NULL, 0, 0, 0, 0,
926  0);
928  return;
929  }
931  GNUNET_ntohll (msg->next_uid),
932  msg->random,
933  &msg->key,
934  ntohl (msg->type),
935  &transmit_item,
936  client);
938 }
uint32_t random
If true return a random result.
Definition: datastore.h:129
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.
static int transmit_item(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
Function that will transmit the given datastore entry to the client.
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Handle to a client that is connected to a service.
Definition: service.c:249
int GNUNET_CONTAINER_bloomfilter_test(const struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Test if an element is in the filter.
uint32_t type
Desired content type.
Definition: datastore.h:119
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
struct GNUNET_HashCode key
Desired key.
Definition: datastore.h:134
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
uint64_t next_uid
UID at which to start the search.
Definition: datastore.h:124
PluginGetKey get_key
Get a particular datum matching a given hash from the datastore.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_get_replication()

static void handle_get_replication ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Handle GET_REPLICATION-message.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 948 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::get_replication, gettext_noop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), and transmit_item().

950 {
951  struct GNUNET_SERVICE_Client *client = cls;
952 
954  "Processing GET_REPLICATION request\n");
956  gettext_noop ("# GET REPLICATION requests received"),
957  1,
958  GNUNET_NO);
960  &transmit_item,
961  client);
963 }
static int transmit_item(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
Function that will transmit the given datastore entry to the client.
#define GNUNET_NO
Definition: gnunet_common.h:81
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Handle to a client that is connected to a service.
Definition: service.c:249
PluginGetRandom get_replication
Function to get a random item with high replication score from the database, lowering the item&#39;s repl...
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_get_zero_anonymity()

static void handle_get_zero_anonymity ( void *  cls,
const struct GetZeroAnonymityMessage msg 
)
static

Handle GET_ZERO_ANONYMITY-message.

Parameters
clsclient identification of the client
messagethe actual message

Definition at line 973 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::get_zero_anonymity, gettext_noop, GNUNET_BLOCK_TYPE_ANY, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_ntohll(), GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_STATISTICS_update(), GetZeroAnonymityMessage::next_uid, transmit_item(), type, and GetZeroAnonymityMessage::type.

975 {
976  struct GNUNET_SERVICE_Client *client = cls;
977  enum GNUNET_BLOCK_Type type;
978 
979  type = (enum GNUNET_BLOCK_Type) ntohl (msg->type);
980  if (type == GNUNET_BLOCK_TYPE_ANY)
981  {
982  GNUNET_break (0);
984  return;
985  }
987  "Processing GET_ZERO_ANONYMITY request\n");
989  gettext_noop ("# GET ZERO ANONYMITY requests received"),
990  1,
991  GNUNET_NO);
993  GNUNET_ntohll (msg->next_uid),
994  type,
995  &transmit_item,
996  client);
998 }
PluginGetType get_zero_anonymity
Get datum (of the specified type) with anonymity level zero.
uint32_t type
Desired content type (actually an enum GNUNET_BLOCK_Type)
Definition: datastore.h:182
Any type of block, used as a wildcard when searching.
static int transmit_item(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid)
Function that will transmit the given datastore entry to the client.
GNUNET_BLOCK_Type
Blocks in the datastore and the datacache must have a unique type.
#define GNUNET_NO
Definition: gnunet_common.h:81
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Handle to a client that is connected to a service.
Definition: service.c:249
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
uint64_t next_uid
UID at which to start the search.
Definition: datastore.h:187
#define GNUNET_log(kind,...)
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
#define gettext_noop(String)
Definition: gettext.h:69
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◆ remove_continuation()

static void remove_continuation ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
int  status,
const char *  msg 
)
static

Remove continuation.

Parameters
clsclosure
keykey for the content
sizenumber of bytes in data
statusGNUNET_OK if removed, GNUNET_NO if not found, or #GNUNET_SYSERROR if error
msgerror message on error

Definition at line 1012 of file gnunet-service-datastore.c.

References _, gettext_noop, GNUNET_CONTAINER_bloomfilter_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_OK, GNUNET_STATISTICS_update(), GNUNET_SYSERR, GNUNET_YES, and transmit_status().

Referenced by handle_remove().

1017 {
1018  struct GNUNET_SERVICE_Client *client = cls;
1019 
1020  if (GNUNET_SYSERR == status)
1021  {
1023  "REMOVE request failed: %s.\n",
1024  msg);
1025  transmit_status (client,
1026  GNUNET_NO,
1027  msg);
1028  return;
1029  }
1030  if (GNUNET_NO == status)
1031  {
1033  "Content not found for REMOVE request.\n");
1034  transmit_status (client,
1035  GNUNET_NO,
1036  _("Content not found"));
1037  return;
1038  }
1040  "Item matches REMOVE request for key `%s'.\n",
1041  GNUNET_h2s (key));
1043  gettext_noop ("# bytes removed (explicit request)"),
1044  size,
1045  GNUNET_YES);
1047  key);
1048  transmit_status (client,
1049  GNUNET_OK,
1050  NULL);
1051 }
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
Handle to a client that is connected to a service.
Definition: service.c:249
void GNUNET_CONTAINER_bloomfilter_remove(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Remove an element from the filter.
uint16_t status
See PRISM_STATUS_*-constants.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static unsigned int size
Size of the "table".
Definition: peer.c:67
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
static void transmit_status(struct GNUNET_SERVICE_Client *client, int code, const char *msg)
Transmit a status code to the client.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ check_remove()

static int check_remove ( void *  cls,
const struct DataMessage dm 
)
static

Verify REMOVE-message.

Parameters
clsidentification of the client
messagethe actual message
Returns
GNUNET_OK if dm is well-formed

Definition at line 1062 of file gnunet-service-datastore.c.

References check_data(), GNUNET_break, GNUNET_OK, and GNUNET_SYSERR.

1064 {
1065  if (GNUNET_OK != check_data (dm))
1066  {
1067  GNUNET_break (0);
1068  return GNUNET_SYSERR;
1069  }
1070  return GNUNET_OK;
1071 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static int check_data(const struct DataMessage *dm)
Check that the given message is a valid data message.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
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◆ handle_remove()

static void handle_remove ( void *  cls,
const struct DataMessage dm 
)
static

Handle REMOVE-message.

Parameters
clsclosure
clientidentification of the client
messagethe actual message

Definition at line 1082 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, gettext_noop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), DataMessage::key, remove_continuation(), GNUNET_DATASTORE_PluginFunctions::remove_key, and DataMessage::size.

1084 {
1085  struct GNUNET_SERVICE_Client *client = cls;
1086 
1088  gettext_noop ("# REMOVE requests received"),
1089  1, GNUNET_NO);
1091  "Processing REMOVE request for `%s'\n",
1092  GNUNET_h2s (&dm->key));
1094  &dm->key,
1095  ntohl (dm->size),
1096  &dm[1],
1098  client);
1100 }
PluginRemoveKey remove_key
Function to remove an item from the database.
static void remove_continuation(void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
Remove continuation.
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Handle to a client that is connected to a service.
Definition: service.c:249
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
uint32_t size
Number of bytes in the item (NBO).
Definition: datastore.h:214
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
struct GNUNET_HashCode key
Key under which the item can be found.
Definition: datastore.h:257
#define GNUNET_log(kind,...)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define gettext_noop(String)
Definition: gettext.h:69
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◆ handle_drop()

static void handle_drop ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Handle DROP-message.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 1110 of file gnunet-service-datastore.c.

References do_drop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_SERVICE_client_continue(), and GNUNET_YES.

1112 {
1113  struct GNUNET_SERVICE_Client *client = cls;
1114 
1116  "Processing DROP request\n");
1117  do_drop = GNUNET_YES;
1119 }
static int do_drop
Should the database be dropped on exit?
Handle to a client that is connected to a service.
Definition: service.c:249
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
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◆ disk_utilization_change_cb()

static void disk_utilization_change_cb ( void *  cls,
int  delta 
)
static

Function called by plugins to notify us about a change in their disk utilization.

Parameters
clsclosure (NULL)
deltachange in disk utilization, 0 for "reset to empty"

Definition at line 1131 of file gnunet-service-datastore.c.

References _, DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, delta, GNUNET_DATASTORE_PluginFunctions::estimate_size, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, last_sync, MAX_STAT_SYNC_LAG, payload, and sync_stats().

Referenced by load_plugin().

1133 {
1134  if ((delta < 0) && (payload < -delta))
1135  {
1137  _("Datastore payload must have been inaccurate (%lld < %lld). Recomputing it.\n"),
1138  (long long) payload,
1139  (long long) -delta);
1141  &payload);
1143  _("New payload: %lld\n"),
1144  (long long) payload);
1145  sync_stats ();
1146  return;
1147  }
1148  payload += delta;
1149  last_sync++;
1151  sync_stats ();
1152 }
static struct GNUNET_TIME_Relative delta
Definition: speedup.c:35
#define MAX_STAT_SYNC_LAG
After how many payload-changing operations do we sync our statistics?
PluginEstimateSize estimate_size
Calculate the current on-disk size of the SQ store.
static void sync_stats()
Synchronize our utilization statistics with the statistics service.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static unsigned int last_sync
Number of updates that were made to the payload value since we last synchronized it with the statisti...
static unsigned long long payload
How much data are we currently storing in the database?
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
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◆ process_stat_in()

static int process_stat_in ( void *  cls,
const char *  subsystem,
const char *  name,
uint64_t  value,
int  is_persistent 
)
static

Callback function to process statistic values.

Parameters
clsclosure (struct Plugin*)
subsystemname of subsystem that created the statistic
namethe name of the datum
valuethe current value
is_persistentGNUNET_YES if the value is persistent, GNUNET_NO if not
Returns
GNUNET_OK to continue, GNUNET_SYSERR to abort iteration

Definition at line 1166 of file gnunet-service-datastore.c.

References GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_OK, GNUNET_YES, payload, stats_worked, and value.

Referenced by run().

1171 {
1174  payload += value;
1176  "Notification from statistics about existing payload (%llu), new payload is %llu\n",
1177  (unsigned long long) value,
1178  (unsigned long long) payload);
1179  return GNUNET_OK;
1180 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
static char * value
Value of the record to add/remove.
static int stats_worked
Did we get an answer from statistics?
static unsigned long long payload
How much data are we currently storing in the database?
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
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◆ load_plugin()

static struct DatastorePlugin* load_plugin ( )
static

Load the datastore plugin.

Definition at line 1187 of file gnunet-service-datastore.c.

References _, DatastorePlugin::api, GNUNET_DATASTORE_PluginEnvironment::cfg, cfg, GNUNET_DATASTORE_PluginEnvironment::cls, disk_utilization_change_cb(), GNUNET_DATASTORE_PluginEnvironment::duc, DatastorePlugin::env, GNUNET_asprintf(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log, GNUNET_new, GNUNET_PLUGIN_load(), GNUNET_strdup, DatastorePlugin::lib_name, plugin_name, ret, and DatastorePlugin::short_name.

Referenced by process_stat_done().

1188 {
1189  struct DatastorePlugin *ret;
1190  char *libname;
1191 
1192  ret = GNUNET_new (struct DatastorePlugin);
1193  ret->env.cfg = cfg;
1195  ret->env.cls = NULL;
1197  _("Loading `%s' datastore plugin\n"),
1198  plugin_name);
1199  GNUNET_asprintf (&libname,
1200  "libgnunet_plugin_datastore_%s",
1201  plugin_name);
1203  ret->lib_name = libname;
1204  ret->api = GNUNET_PLUGIN_load (libname,
1205  &ret->env);
1206  if (NULL == ret->api)
1207  {
1209  _("Failed to load datastore plugin for `%s'\n"),
1210  plugin_name);
1211  GNUNET_free (ret->short_name);
1212  GNUNET_free (libname);
1213  GNUNET_free (ret);
1214  return NULL;
1215  }
1216  return ret;
1217 }
GNUNET_DATASTORE_DiskUtilizationChange duc
Function to call on disk utilization change.
static void disk_utilization_change_cb(void *cls, int delta)
Function called by plugins to notify us about a change in their disk utilization. ...
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Our datastore plugin.
char * lib_name
Name of the library (i.e.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static int ret
Final status code.
Definition: gnunet-arm.c:89
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
int GNUNET_asprintf(char **buf, const char *format,...)
Like asprintf, just portable.
char * short_name
Short name for the plugin (i.e.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
struct GNUNET_DATASTORE_PluginEnvironment env
Environment this transport service is using for this plugin.
#define GNUNET_log(kind,...)
void * GNUNET_PLUGIN_load(const char *library_name, void *arg)
Setup plugin (runs the "init" callback and returns whatever "init" returned).
Definition: plugin.c:210
static char * plugin_name
Name of our plugin.
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration to use.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ unload_plugin()

static void unload_plugin ( struct DatastorePlugin plug)
static

Function called when the service shuts down.

Unloads our datastore plugin.

Parameters
plugplugin to unload

Definition at line 1227 of file gnunet-service-datastore.c.

References DatastorePlugin::api, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_PLUGIN_unload(), DatastorePlugin::lib_name, and DatastorePlugin::short_name.

Referenced by cleaning_task().

1228 {
1230  "Datastore service is unloading plugin...\n");
1231  GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
1232  GNUNET_free (plug->lib_name);
1233  GNUNET_free (plug->short_name);
1234  GNUNET_free (plug);
1235 }
char * lib_name
Name of the library (i.e.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
void * GNUNET_PLUGIN_unload(const char *library_name, void *arg)
Unload plugin (runs the "done" callback and returns whatever "done" returned).
Definition: plugin.c:258
char * short_name
Short name for the plugin (i.e.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
#define GNUNET_log(kind,...)
#define GNUNET_free(ptr)
Wrapper around free.
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◆ begin_service()

static void begin_service ( )
static

Initialization complete, start operating the service.

Definition at line 1242 of file gnunet-service-datastore.c.

References delete_expired(), GNUNET_SCHEDULER_add_with_priority(), GNUNET_SCHEDULER_PRIORITY_IDLE, and GNUNET_SERVICE_resume().

Referenced by add_key_to_bloomfilter(), and process_stat_done().

1243 {
1247  &delete_expired,
1248  NULL);
1249 }
void GNUNET_SERVICE_resume(struct GNUNET_SERVICE_Handle *sh)
Resume accepting connections from the listen socket.
Definition: service.c:2481
static struct GNUNET_SERVICE_Handle * service
Handle to our server.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority(enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority.
Definition: scheduler.c:1200
static struct GNUNET_SCHEDULER_Task * expired_kill_task
Identity of the task that is used to delete expired content.
Run when otherwise idle.
static void delete_expired(void *cls)
Task that is used to remove expired entries from the datastore.
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◆ add_key_to_bloomfilter()

static void add_key_to_bloomfilter ( void *  cls,
const struct GNUNET_HashCode key,
unsigned int  count 
)
static

Adds a given key to the bloomfilter in cls count times.

Parameters
clsthe bloomfilter
keykey to add
countnumber of times to add key

Definition at line 1260 of file gnunet-service-datastore.c.

References _, begin_service(), GNUNET_CONTAINER_bloomfilter_add(), GNUNET_ERROR_TYPE_INFO, and GNUNET_log.

Referenced by process_stat_done().

1263 {
1264  struct GNUNET_CONTAINER_BloomFilter *bf = cls;
1265 
1266  if (NULL == key)
1267  {
1269  _("Bloomfilter construction complete.\n"));
1270  begin_service ();
1271  return;
1272  }
1273 
1274  while (0 < count--)
1276  key);
1277 }
void GNUNET_CONTAINER_bloomfilter_add(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Add an element to the filter.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
static void begin_service()
Initialization complete, start operating the service.
#define GNUNET_log(kind,...)
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◆ process_stat_done()

static void process_stat_done ( void *  cls,
int  success 
)
static

We finished receiving the statistic.

Initialize the plugin; if loading the statistic failed, run the estimator.

Parameters
clsNULL
successGNUNET_NO if we failed to read the stat

Definition at line 1288 of file gnunet-service-datastore.c.

References _, add_key_to_bloomfilter(), DatastorePlugin::api, begin_service(), GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::estimate_size, GNUNET_DATASTORE_PluginFunctions::get_keys, GNUNET_CONTAINER_bloomfilter_free(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_log, GNUNET_NO, GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_destroy(), GNUNET_YES, load_plugin(), payload, refresh_bf, and stats_worked.

Referenced by run(), and stat_timeout().

1290 {
1291  stat_get = NULL;
1292  if (NULL != stat_timeout_task)
1293  {
1295  stat_timeout_task = NULL;
1296  }
1297  plugin = load_plugin ();
1298  if (NULL == plugin)
1299  {
1301  filter = NULL;
1302  if (NULL != stats)
1303  {
1305  GNUNET_YES);
1306  stats = NULL;
1307  }
1308  return;
1309  }
1310 
1311  if (GNUNET_NO == stats_worked)
1312  {
1314  "Failed to obtain value from statistics service, recomputing it\n");
1316  &payload);
1318  _("New payload: %lld\n"),
1319  (long long) payload);
1320  }
1321 
1322  if (GNUNET_YES == refresh_bf)
1323  {
1325  _("Rebuilding bloomfilter. Please be patient.\n"));
1326  if (NULL != plugin->api->get_keys)
1327  {
1330  filter);
1331  return;
1332  }
1333  else
1334  {
1336  _("Plugin does not support get_keys function. Please fix!\n"));
1337  }
1338  }
1339  begin_service ();
1340 }
static void add_key_to_bloomfilter(void *cls, const struct GNUNET_HashCode *key, unsigned int count)
Adds a given key to the bloomfilter in cls count times.
PluginGetKeys get_keys
Iterate over all keys in the database.
PluginEstimateSize estimate_size
Calculate the current on-disk size of the SQ store.
#define GNUNET_NO
Definition: gnunet_common.h:81
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
static struct DatastorePlugin * load_plugin()
Load the datastore plugin.
static struct GNUNET_STATISTICS_GetHandle * stat_get
Handle for pending get request.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static int stats_worked
Did we get an answer from statistics?
static int refresh_bf
Should we refresh the BF when the DB is loaded?
static unsigned long long payload
How much data are we currently storing in the database?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
static void begin_service()
Initialization complete, start operating the service.
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
void GNUNET_CONTAINER_bloomfilter_free(struct GNUNET_CONTAINER_BloomFilter *bf)
Free the space associcated with a filter in memory, flush to drive if needed (do not free the space o...
static struct GNUNET_SCHEDULER_Task * stat_timeout_task
Task to timeout stat GET.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:965
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◆ stat_timeout()

static void stat_timeout ( void *  cls)
static

Fetching stats took to long, run without.

Parameters
clsNULL

Definition at line 1349 of file gnunet-service-datastore.c.

References GNUNET_NO, GNUNET_STATISTICS_get_cancel(), and process_stat_done().

Referenced by run().

1350 {
1351  stat_timeout_task = NULL;
1353  process_stat_done (NULL,
1354  GNUNET_NO);
1355 }
void GNUNET_STATISTICS_get_cancel(struct GNUNET_STATISTICS_GetHandle *gh)
Cancel a GNUNET_STATISTICS_get request.
#define GNUNET_NO
Definition: gnunet_common.h:81
static struct GNUNET_STATISTICS_GetHandle * stat_get
Handle for pending get request.
static void process_stat_done(void *cls, int success)
We finished receiving the statistic.
static struct GNUNET_SCHEDULER_Task * stat_timeout_task
Task to timeout stat GET.
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◆ cleaning_task()

static void cleaning_task ( void *  cls)
static

Task run during shutdown.

Definition at line 1362 of file gnunet-service-datastore.c.

References DatastorePlugin::api, cleaning_done, GNUNET_DATASTORE_PluginFunctions::cls, do_drop, GNUNET_DATASTORE_PluginFunctions::drop, GNUNET_CONTAINER_bloomfilter_free(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_free_non_null, GNUNET_log, GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_destroy(), GNUNET_STATISTICS_get_cancel(), GNUNET_YES, last_sync, payload, plugin_name, quota_stat_name, sync_stats(), and unload_plugin().

Referenced by run().

1363 {
1365  if (NULL != expired_kill_task)
1366  {
1368  expired_kill_task = NULL;
1369  }
1370  if (GNUNET_YES == do_drop)
1371  {
1373  "Dropping database!\n");
1374  plugin->api->drop (plugin->api->cls);
1375  payload = 0;
1376  last_sync++;
1377  }
1378  if (NULL != plugin)
1379  {
1381  plugin = NULL;
1382  }
1383  if (NULL != filter)
1384  {
1386  filter = NULL;
1387  }
1388  if (NULL != stat_get)
1389  {
1391  stat_get = NULL;
1392  }
1393  if (NULL != stat_timeout_task)
1394  {
1396  stat_timeout_task = NULL;
1397  }
1399  plugin_name = NULL;
1400  if (last_sync > 0)
1401  sync_stats ();
1402  if (NULL != stats)
1403  {
1405  GNUNET_YES);
1406  stats = NULL;
1407  }
1409  quota_stat_name = NULL;
1410 }
static int cleaning_done
Have we already cleaned up the TCCs and are hence no longer willing (or able) to transmit anything to...
void GNUNET_STATISTICS_get_cancel(struct GNUNET_STATISTICS_GetHandle *gh)
Cancel a GNUNET_STATISTICS_get request.
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
static int do_drop
Should the database be dropped on exit?
static char * quota_stat_name
Name under which we store current space consumption.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
static void sync_stats()
Synchronize our utilization statistics with the statistics service.
PluginDrop drop
Delete the database.
static void unload_plugin(struct DatastorePlugin *plug)
Function called when the service shuts down.
static struct GNUNET_STATISTICS_GetHandle * stat_get
Handle for pending get request.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
static struct GNUNET_SCHEDULER_Task * expired_kill_task
Identity of the task that is used to delete expired content.
struct GNUNET_DATASTORE_PluginFunctions * api
API of the transport as returned by the plugin&#39;s initialization function.
static unsigned int last_sync
Number of updates that were made to the payload value since we last synchronized it with the statisti...
static unsigned long long payload
How much data are we currently storing in the database?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static struct DatastorePlugin * plugin
Our datastore plugin (NULL if not available).
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:80
void GNUNET_CONTAINER_bloomfilter_free(struct GNUNET_CONTAINER_BloomFilter *bf)
Free the space associcated with a filter in memory, flush to drive if needed (do not free the space o...
static char * plugin_name
Name of our plugin.
#define GNUNET_free(ptr)
Wrapper around free.
static struct GNUNET_SCHEDULER_Task * stat_timeout_task
Task to timeout stat GET.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:965
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◆ client_connect_cb()

static void* client_connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

Add a client to our list of active clients.

Parameters
clsNULL
clientclient to add
mqmessage queue for client
Returns
client

Definition at line 1422 of file gnunet-service-datastore.c.

Referenced by run().

1425 {
1426  return client;
1427 }
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◆ client_disconnect_cb()

static void client_disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_ctx 
)
static

Called whenever a client is disconnected.

Frees our resources associated with that client.

Parameters
clsclosure
clientidentification of the client
app_ctxmust match client

Definition at line 1439 of file gnunet-service-datastore.c.

References ReservationList::amount, ReservationList::client, ReservationList::entries, gettext_noop, GNUNET_assert, GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_free, GNUNET_NO, GNUNET_STATISTICS_set(), ReservationList::next, reservations, and reserved.

Referenced by run().

1442 {
1443  struct ReservationList *pos;
1444  struct ReservationList *prev;
1445  struct ReservationList *next;
1446 
1447  GNUNET_assert (app_ctx == client);
1448  prev = NULL;
1449  pos = reservations;
1450  while (NULL != pos)
1451  {
1452  next = pos->next;
1453  if (pos->client == client)
1454  {
1455  if (NULL == prev)
1456  reservations = next;
1457  else
1458  prev->next = next;
1460  GNUNET_free (pos);
1461  }
1462  else
1463  {
1464  prev = pos;
1465  }
1466  pos = next;
1467  }
1469  gettext_noop ("# reserved"),
1470  reserved,
1471  GNUNET_NO);
1472 
1473 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
uint64_t amount
Number of bytes (still) reserved.
#define GNUNET_NO
Definition: gnunet_common.h:81
static struct ReservationList * reservations
Linked list of space reservations made by clients.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
struct ReservationList * next
This is a linked list.
uint64_t entries
Number of items (still) reserved.
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
static unsigned long long reserved
How much space have we currently reserved?
struct GNUNET_SERVICE_Client * client
Client that made the reservation.
Linked list of active reservations.
#define GNUNET_free(ptr)
Wrapper around free.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_SERVICE_Handle serv 
)
static

Process datastore requests.

Parameters
clsclosure
servthe initialized service
cconfiguration to use

Definition at line 1484 of file gnunet-service-datastore.c.

References _, cache_size, cleaning_task(), client_connect_cb(), client_disconnect_cb(), fn, gettext_noop, GNUNET_asprintf(), GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_size(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_CONTAINER_bloomfilter_init(), GNUNET_CONTAINER_bloomfilter_load(), GNUNET_DISK_directory_create_for_file(), GNUNET_DISK_file_test(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_free_non_null, GNUNET_log, GNUNET_log_config_missing(), GNUNET_MESSAGE_TYPE_DATASTORE_DROP, GNUNET_MESSAGE_TYPE_DATASTORE_GET, GNUNET_MESSAGE_TYPE_DATASTORE_GET_KEY, GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION, GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY, GNUNET_MESSAGE_TYPE_DATASTORE_PUT, GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE, GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, GNUNET_SERVICE_suspend(), GNUNET_STATISTICS_create(), GNUNET_STATISTICS_destroy(), GNUNET_STATISTICS_get(), GNUNET_STATISTICS_set(), GNUNET_SYSERR, GNUNET_TIME_UNIT_SECONDS, GNUNET_YES, MAX_BF_SIZE, plugin_name, process_stat_done(), process_stat_in(), quota, quota_stat_name, refresh_bf, stat_timeout(), and UNLINK.

1487 {
1488  char *fn;
1489  char *pfn;
1490  unsigned int bf_size;
1491 
1492  service = serv;
1493  cfg = c;
1494  if (GNUNET_OK !=
1496  "DATASTORE",
1497  "DATABASE",
1498  &plugin_name))
1499  {
1501  "DATABASE",
1502  "DATASTORE");
1503  return;
1504  }
1506  _("# bytes used in file-sharing datastore `%s'"),
1507  plugin_name);
1508  if (GNUNET_OK !=
1510  "DATASTORE",
1511  "QUOTA",
1512  &quota))
1513  {
1515  "QUOTA",
1516  "DATASTORE");
1517  return;
1518  }
1519  stats = GNUNET_STATISTICS_create ("datastore",
1520  cfg);
1522  gettext_noop ("# quota"),
1523  quota,
1524  GNUNET_NO);
1525  cache_size = quota / 8; /* Or should we make this an option? */
1527  gettext_noop ("# cache size"),
1528  cache_size,
1529  GNUNET_NO);
1530  if (quota / (32 * 1024LL) > MAX_BF_SIZE)
1531  bf_size = MAX_BF_SIZE;
1532  else
1533  bf_size = quota / (32 * 1024LL); /* 8 bit per entry, 1 bit per 32 kb in DB */
1534  fn = NULL;
1535  if ((GNUNET_OK !=
1537  "DATASTORE",
1538  "BLOOMFILTER",
1539  &fn)) ||
1541  {
1543  _("Could not use specified filename `%s' for bloomfilter.\n"),
1544  NULL != fn ? fn : "");
1545  GNUNET_free_non_null (fn);
1546  fn = NULL;
1547  }
1548  if (NULL != fn)
1549  {
1550  GNUNET_asprintf (&pfn, "%s.%s", fn, plugin_name);
1551  if (GNUNET_YES == GNUNET_DISK_file_test (pfn))
1552  {
1553  filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */
1554  if (NULL == filter)
1555  {
1556  /* file exists but not valid, remove and try again, but refresh */
1557  if (0 != UNLINK (pfn))
1558  {
1559  /* failed to remove, run without file */
1561  _("Failed to remove bogus bloomfilter file `%s'\n"),
1562  pfn);
1563  GNUNET_free (pfn);
1564  pfn = NULL;
1565  filter = GNUNET_CONTAINER_bloomfilter_load (NULL, bf_size, 5); /* approx. 3% false positives at max use */
1567  }
1568  else
1569  {
1570  /* try again after remove */
1571  filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */
1573  if (NULL == filter)
1574  {
1575  /* failed yet again, give up on using file */
1577  _("Failed to remove bogus bloomfilter file `%s'\n"),
1578  pfn);
1579  GNUNET_free (pfn);
1580  pfn = NULL;
1581  filter = GNUNET_CONTAINER_bloomfilter_init (NULL, bf_size, 5); /* approx. 3% false positives at max use */
1582  }
1583  }
1584  }
1585  else
1586  {
1587  /* normal case: have an existing valid bf file, no need to refresh */
1589  }
1590  }
1591  else
1592  {
1593  filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */
1595  }
1596  GNUNET_free (pfn);
1597  }
1598  else
1599  {
1601  bf_size,
1602  5); /* approx. 3% false positives at max use */
1604  }
1605  GNUNET_free_non_null (fn);
1606  if (NULL == filter)
1607  {
1609  _("Failed to initialize bloomfilter.\n"));
1610  if (NULL != stats)
1611  {
1613  GNUNET_YES);
1614  stats = NULL;
1615  }
1616  return;
1617  }
1619  stat_get =
1621  "datastore",
1624  &process_stat_in,
1625  NULL);
1626  if (NULL == stat_get)
1627  process_stat_done (NULL,
1628  GNUNET_SYSERR);
1629  else
1632  &stat_timeout,
1633  NULL);
1635  NULL);
1636 }
int GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory)...
Definition: disk.c:669
struct GNUNET_CONTAINER_BloomFilter * GNUNET_CONTAINER_bloomfilter_init(const char *data, size_t size, unsigned int k)
Create a Bloom filter from raw bits.
static struct GNUNET_SERVICE_Handle * service
Handle to our server.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1293
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
#define GNUNET_TIME_UNIT_SECONDS
One second.
int GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:833
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
static char * quota_stat_name
Name under which we store current space consumption.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
#define UNLINK(f)
Definition: plibc.h:666
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
int GNUNET_asprintf(char **buf, const char *format,...)
Like asprintf, just portable.
static struct GNUNET_STATISTICS_GetHandle * stat_get
Handle for pending get request.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1246
static int process_stat_in(void *cls, const char *subsystem, const char *name, uint64_t value, int is_persistent)
Callback function to process statistic values.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
static char * fn
Filename of the unique file.
static void process_stat_done(void *cls, int success)
We finished receiving the statistic.
struct GNUNET_CONTAINER_BloomFilter * GNUNET_CONTAINER_bloomfilter_load(const char *filename, size_t size, unsigned int k)
Load a Bloom filter from a file.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don&#39;t have the content.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
int GNUNET_CONFIGURATION_get_value_size(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *size)
Get a configuration value that should be a size in bytes.
int GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
static void stat_timeout(void *cls)
Fetching stats took to long, run without.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static int refresh_bf
Should we refresh the BF when the DB is loaded?
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
static unsigned long long quota
How much space are we allowed to use?
static void cleaning_task(void *cls)
Task run during shutdown.
static unsigned long long cache_size
How much space are we using for the cache? (space available for insertions that will be instantly rec...
struct GNUNET_STATISTICS_GetHandle * GNUNET_STATISTICS_get(struct GNUNET_STATISTICS_Handle *handle, const char *subsystem, const char *name, GNUNET_STATISTICS_Callback cont, GNUNET_STATISTICS_Iterator proc, void *cls)
Get statistic from the peer.
#define GNUNET_log(kind,...)
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
#define MAX_BF_SIZE
Limit size of bloom filter to 2 GB.
#define GNUNET_YES
Definition: gnunet_common.h:80
void GNUNET_SERVICE_suspend(struct GNUNET_SERVICE_Handle *sh)
Suspend accepting connections from the listen socket temporarily.
Definition: service.c:2468
static char * plugin_name
Name of our plugin.
#define GNUNET_free(ptr)
Wrapper around free.
static struct GNUNET_SCHEDULER_Task * stat_timeout_task
Task to timeout stat GET.
#define gettext_noop(String)
Definition: gettext.h:69
Here is the call graph for this function:

◆ GNUNET_SERVICE_MAIN()

Define "main" method using service macro.

Referenced by run().

Here is the caller graph for this function:

Variable Documentation

◆ quota_stat_name

char* quota_stat_name
static

Name under which we store current space consumption.

Definition at line 59 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), run(), and sync_stats().

◆ stat_timeout_task

struct GNUNET_SCHEDULER_Task* stat_timeout_task
static

Task to timeout stat GET.

Definition at line 64 of file gnunet-service-datastore.c.

◆ plugin

struct DatastorePlugin* plugin
static

Our datastore plugin (NULL if not available).

Definition at line 142 of file gnunet-service-datastore.c.

◆ reservations

struct ReservationList* reservations
static

Linked list of space reservations made by clients.

Definition at line 147 of file gnunet-service-datastore.c.

Referenced by client_disconnect_cb(), handle_put(), handle_release_reserve(), and handle_reserve().

◆ filter

struct GNUNET_CONTAINER_BloomFilter* filter
static

Bloomfilter to quickly tell if we don't have the content.

Definition at line 152 of file gnunet-service-datastore.c.

Referenced by api_create_hello(), api_send(), get_audiobin(), and main().

◆ plugin_name

char* plugin_name
static

Name of our plugin.

Definition at line 157 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), load_plugin(), and run().

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

Our configuration.

Definition at line 162 of file gnunet-service-datastore.c.

Referenced by load_plugin().

◆ stats

struct GNUNET_STATISTICS_Handle* stats
static

Handle for reporting statistics.

Definition at line 167 of file gnunet-service-datastore.c.

◆ cache_size

unsigned long long cache_size
static

How much space are we using for the cache? (space available for insertions that will be instantly reclaimed by discarding less important content — or possibly whatever we just inserted into the "cache").

Definition at line 175 of file gnunet-service-datastore.c.

Referenced by handle_reserve(), put_continuation(), and run().

◆ reserved

unsigned long long reserved
static

How much space have we currently reserved?

Definition at line 180 of file gnunet-service-datastore.c.

Referenced by client_disconnect_cb(), handle_put(), handle_release_reserve(), handle_reserve(), and put_continuation().

◆ payload

unsigned long long payload
static

◆ expired_kill_task

struct GNUNET_SCHEDULER_Task* expired_kill_task
static

Identity of the task that is used to delete expired content.

Definition at line 192 of file gnunet-service-datastore.c.

◆ min_expiration

struct GNUNET_TIME_Absolute min_expiration
static

Minimum time that content should have to not be discarded instantly (time stamp of any content that we've been discarding recently to stay below the quota).

FOREVER if we had to expire content with non-zero priority.

Definition at line 200 of file gnunet-service-datastore.c.

Referenced by expired_processor(), quota_processor(), and transmit_status().

◆ quota

unsigned long long quota
static

How much space are we allowed to use?

Definition at line 205 of file gnunet-service-datastore.c.

Referenced by GNUNET_DATACACHE_create(), handle_reserve(), put_continuation(), and run().

◆ do_drop

int do_drop
static

Should the database be dropped on exit?

Definition at line 210 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), and handle_drop().

◆ refresh_bf

int refresh_bf
static

Should we refresh the BF when the DB is loaded?

Definition at line 215 of file gnunet-service-datastore.c.

Referenced by process_stat_done(), and run().

◆ last_sync

unsigned int last_sync
static

Number of updates that were made to the payload value since we last synchronized it with the statistics service.

Definition at line 222 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), disk_utilization_change_cb(), and sync_stats().

◆ stats_worked

int stats_worked
static

Did we get an answer from statistics?

Definition at line 227 of file gnunet-service-datastore.c.

Referenced by process_stat_done(), and process_stat_in().

◆ cleaning_done

int cleaning_done
static

Have we already cleaned up the TCCs and are hence no longer willing (or able) to transmit anything to anyone?

Definition at line 253 of file gnunet-service-datastore.c.

Referenced by cleaning_task().

◆ stat_get

struct GNUNET_STATISTICS_GetHandle* stat_get
static

Handle for pending get request.

Definition at line 258 of file gnunet-service-datastore.c.

◆ service

struct GNUNET_SERVICE_Handle* service
static

Handle to our server.

Definition at line 263 of file gnunet-service-datastore.c.