GNUnet 0.21.1
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.

◆ 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.

◆ 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 55 of file gnunet-service-datastore.c.

◆ MAX_STAT_SYNC_LAG

#define MAX_STAT_SYNC_LAG   50

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

Definition at line 72 of file gnunet-service-datastore.c.

Function Documentation

◆ sync_stats()

static void sync_stats ( )
static

Synchronize our utilization statistics with the statistics service.

Definition at line 232 of file gnunet-service-datastore.c.

233{
236 "# utilization by current datastore",
237 payload,
238 GNUNET_NO);
239 last_sync = 0;
240}
static struct GNUNET_STATISTICS_Handle * stats
Handle for reporting statistics.
static unsigned long long payload
How much data are we currently storing in the database?
static char * quota_stat_name
Name under which we store current space consumption.
static unsigned int last_sync
Number of updates that were made to the payload value since we last synchronized it with the statisti...
@ GNUNET_YES
@ GNUNET_NO
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.

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

Referenced by cleaning_task(), and disk_utilization_change_cb().

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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 357 of file gnunet-service-datastore.c.

358{
359 expired_kill_task = NULL;
361}
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).
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's initialization function.
PluginGetRandom get_expiration
Function to get a random expired item or, if none are expired, either the oldest entry or one with a ...
void * cls
Closure to use for all of the following callbacks (except "next_request").

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

Referenced by begin_service(), and expired_processor().

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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 293 of file gnunet-service-datastore.c.

303{
304 struct GNUNET_TIME_Absolute now;
305
306 if (NULL == key)
307 {
312 NULL);
313 return GNUNET_SYSERR;
314 }
316 if (expiration.abs_value_us > now.abs_value_us)
317 {
318 /* finished processing */
323 NULL);
324 return GNUNET_SYSERR;
325 }
327 "Deleting content `%s' of type %u that expired %s ago\n",
328 GNUNET_h2s (key),
329 type,
332 GNUNET_YES));
333 min_expiration = now;
335 gettext_noop ("# bytes expired"),
336 size,
337 GNUNET_YES);
343 NULL);
344 return GNUNET_NO;
345}
#define gettext_noop(String)
Definition: gettext.h:70
struct GNUNET_HashCode key
The key used in the DHT.
static struct GNUNET_TIME_Relative expiration
User supplied expiration value.
static uint32_t type
Type string converted to DNS type value.
static struct GNUNET_CONTAINER_BloomFilter * filter
Bloomfilter to quickly tell if we don't have the content.
static void delete_expired(void *cls)
Task that is used to remove expired entries from the datastore.
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...
#define MIN_EXPIRE_DELAY
How fast are we allowed to query the database for deleting expired content? (1 item per second).
#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.
#define GNUNET_log(kind,...)
@ GNUNET_SCHEDULER_PRIORITY_IDLE
Run when otherwise idle.
@ GNUNET_SYSERR
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_DEBUG
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:1208
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
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:570
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:111
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:421
static unsigned int size
Size of the "table".
Definition: peer.c:68
Time for absolute times used by GNUnet, in microseconds.

References GNUNET_TIME_Absolute::abs_value_us, delete_expired(), expiration, expired_kill_task, filter, 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, key, MAX_EXPIRE_DELAY, min_expiration, MIN_EXPIRE_DELAY, size, stats, and type.

Referenced by delete_expired().

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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 384 of file gnunet-service-datastore.c.

394{
395 unsigned long long *need = cls;
396
397 if (NULL == key)
398 return GNUNET_SYSERR;
399 GNUNET_log (
401 "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",
402 (unsigned long long) (size + GNUNET_DATASTORE_ENTRY_OVERHEAD),
403 (unsigned int) priority,
404 GNUNET_h2s (key),
405 type,
407 expiration),
408 GNUNET_YES),
409 *need);
411 *need = 0;
412 else
414 if (priority > 0)
416 else
419 gettext_noop ("# bytes purged (low-priority)"),
420 size,
421 GNUNET_YES);
423 return GNUNET_NO;
424}
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)?
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:405
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".

References expiration, filter, 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, key, min_expiration, size, stats, and type.

Referenced by manage_space().

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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.

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;
452 }
453}
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 t...

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

Referenced by put_continuation().

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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 464 of file gnunet-service-datastore.c.

467{
468 struct GNUNET_MQ_Envelope *env;
469 struct StatusMessage *sm;
470 size_t slen;
471
473 "Transmitting `%s' message with value %d and message `%s'\n",
474 "STATUS",
475 code,
476 msg != NULL ? msg : "(none)");
477 slen = (msg == NULL) ? 0 : strlen (msg) + 1;
479 sm->status = htonl (code);
481 GNUNET_memcpy (&sm[1], msg, slen);
483}
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
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:304
#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:63
#define GNUNET_MESSAGE_TYPE_DATASTORE_STATUS
Message sent by datastore to client informing about status processing a request (in response to RESER...
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2566
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:638
Message from datastore service informing client about the success or failure of a requested operation...
Definition: datastore.h:65
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
int32_t status
Status code, -1 for errors.
Definition: datastore.h:74

References 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, msg, and StatusMessage::status.

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

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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 505 of file gnunet-service-datastore.c.

515{
516 struct GNUNET_SERVICE_Client *client = cls;
517 struct GNUNET_MQ_Envelope *env;
519 struct DataMessage *dm;
520
521 if (NULL == key)
522 {
523 /* transmit 'DATA_END' */
524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transmitting DATA_END message\n");
527 return GNUNET_OK;
528 }
531 dm->rid = htonl (0);
532 dm->size = htonl (size);
533 dm->type = htonl (type);
534 dm->priority = htonl (priority);
535 dm->anonymity = htonl (anonymity);
536 dm->replication = htonl (replication);
538 dm->uid = GNUNET_htonll (uid);
539 dm->key = *key;
540 GNUNET_memcpy (&dm[1], data, size);
541 GNUNET_log (
543 "Transmitting DATA message for `%s' of type %u with expiration %s (in: %s)\n",
544 GNUNET_h2s (key),
545 type,
548 expiration),
549 GNUNET_YES));
551 gettext_noop ("# results found"),
552 1,
553 GNUNET_NO);
555 return GNUNET_OK;
556}
static int end
Set if we are to shutdown all services (including ARM).
Definition: gnunet-arm.c:34
static unsigned int replication
Desired replication level.
static char * data
The data to insert into the dht.
static unsigned int anonymity
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message,...
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:37
@ GNUNET_OK
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:78
#define GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END
Message sent by datastore to client signaling end of matching data.
#define GNUNET_MESSAGE_TYPE_DATASTORE_DATA
Message sent by datastore to client providing requested data (in response to GET or GET_RANDOM reques...
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:617
Message transmitting content from or to the datastore service.
Definition: datastore.h:192
uint32_t priority
Priority of the item (NBO), zero for remove.
Definition: datastore.h:219
struct GNUNET_HashCode key
Key under which the item can be found.
Definition: datastore.h:252
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:242
struct GNUNET_TIME_AbsoluteNBO expiration
Expiration time (NBO); zero for remove.
Definition: datastore.h:247
uint32_t type
Type of the item (NBO), zero for remove, (actually an enum GNUNET_BLOCK_Type)
Definition: datastore.h:214
uint32_t size
Number of bytes in the item (NBO).
Definition: datastore.h:209
uint32_t replication
Desired replication level.
Definition: datastore.h:229
uint32_t anonymity
Desired anonymity level (NBO), zero for remove.
Definition: datastore.h:224
uint32_t rid
Reservation ID to use; use zero for none.
Definition: datastore.h:204
Header for all communications.
Handle to a client that is connected to a service.
Definition: service.c:246

References anonymity, DataMessage::anonymity, data, end, env, expiration, 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, replication, DataMessage::replication, DataMessage::rid, size, DataMessage::size, stats, type, DataMessage::type, and DataMessage::uid.

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

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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
msgthe actual message

Static counter to produce reservation identifiers.

Definition at line 566 of file gnunet-service-datastore.c.

567{
571 static int reservation_gen;
572 struct GNUNET_SERVICE_Client *client = cls;
573 struct ReservationList *e;
574 unsigned long long used;
575 unsigned long long req;
576 uint64_t amount;
577 uint32_t entries;
578
579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing RESERVE request\n");
580 amount = GNUNET_ntohll (msg->amount);
581 entries = ntohl (msg->entries);
582 used = payload + reserved;
583 req =
584 amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * entries;
585 if (used + req > quota)
586 {
587 if (quota < used)
588 used =
589 quota; /* cheat a bit for error message (to avoid negative numbers) */
590 GNUNET_log (
592 _ (
593 "Insufficient space (%llu bytes are available) to satisfy RESERVE request for %llu bytes\n"),
594 quota - used,
595 req);
596 if (cache_size < req)
597 {
598 /* TODO: document this in the FAQ; essentially, if this
599 * message happens, the insertion request could be blocked
600 * by less-important content from migration because it is
601 * larger than 1/8th of the overall available space, and
602 * we only reserve 1/8th for "fresh" insertions */
603 GNUNET_log (
605 _ (
606 "The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"),
607 req,
608 cache_size);
610 0,
612 "Insufficient space to satisfy request and "
613 "requested amount is larger than cache size"));
614 }
615 else
616 {
618 0,
619 gettext_noop ("Insufficient space to satisfy request"));
620 }
622 return;
623 }
624 reserved += req;
626 gettext_noop ("# reserved"),
627 reserved,
628 GNUNET_NO);
629 e = GNUNET_new (struct ReservationList);
630 e->next = reservations;
631 reservations = e;
632 e->client = client;
633 e->amount = amount;
634 e->entries = entries;
635 e->rid = ++reservation_gen;
636 if (reservation_gen < 0)
637 reservation_gen = 0; /* wrap around */
638 transmit_status (client, e->rid, NULL);
640}
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 quota
How much space are we allowed to use?
static struct ReservationList * reservations
Linked list of space reservations made by clients.
static unsigned long long reserved
How much space have we currently reserved?
static unsigned long long cache_size
How much space are we using for the cache? (space available for insertions that will be instantly rec...
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:54
@ GNUNET_ERROR_TYPE_WARNING
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2455
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
Linked list of active reservations.
uint64_t amount
Number of bytes (still) reserved.
struct GNUNET_SERVICE_Client * client
Client that made the reservation.
uint64_t entries
Number of items (still) reserved.

References _, ReservationList::amount, cache_size, ReservationList::client, 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(), msg, ReservationList::next, payload, quota, reservations, reserved, ReservationList::rid, stats, and transmit_status().

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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
msgthe actual message

Definition at line 650 of file gnunet-service-datastore.c.

651{
652 struct GNUNET_SERVICE_Client *client = cls;
653 struct ReservationList *pos;
654 struct ReservationList *prev;
655 struct ReservationList *next;
656 int rid = ntohl (msg->rid);
657 unsigned long long rem;
658
659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing RELEASE_RESERVE request\n");
661 prev = NULL;
662 while (NULL != (pos = next))
663 {
664 next = pos->next;
665 if (rid == pos->rid)
666 {
667 if (prev == NULL)
669 else
670 prev->next = next;
671 rem =
672 pos->amount
673 + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries;
674 GNUNET_assert (reserved >= rem);
675 reserved -= rem;
677 gettext_noop ("# reserved"),
678 reserved,
679 GNUNET_NO);
681 "Returning %llu remaining reserved bytes to storage pool\n",
682 rem);
683 GNUNET_free (pos);
686 return;
687 }
688 prev = pos;
689 }
690 GNUNET_break (0);
693 gettext_noop ("Could not find matching reservation"));
695}
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
#define GNUNET_free(ptr)
Wrapper around free.
int32_t rid
Reservation identifier.
struct ReservationList * next
This is a linked list.

References ReservationList::amount, ReservationList::client, 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, msg, ReservationList::next, reservations, reserved, ReservationList::rid, stats, and transmit_status().

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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 705 of file gnunet-service-datastore.c.

706{
707 uint16_t size;
708 uint32_t dsize;
709
710 size = ntohs (dm->header.size);
711 dsize = ntohl (dm->size);
712 if (size != dsize + sizeof(struct DataMessage))
713 {
714 GNUNET_break (0);
715 return GNUNET_SYSERR;
716 }
717 return GNUNET_OK;
718}
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
struct GNUNET_MessageHeader header
Type is either GNUNET_MESSAGE_TYPE_DATASTORE_PUT, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE or GNUNET_MESS...
Definition: datastore.h:199

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

Referenced by check_put(), and check_remove().

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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 732 of file gnunet-service-datastore.c.

737{
738 struct GNUNET_SERVICE_Client *client = cls;
739
740 if (GNUNET_OK == status)
741 {
743 gettext_noop ("# bytes stored"),
744 size,
745 GNUNET_YES);
748 "Successfully stored %u bytes under key `%s'\n",
749 size,
750 GNUNET_h2s (key));
751 }
752 transmit_status (client,
754 msg);
756 {
758 _ ("Need %llu bytes more space (%llu allowed, using %llu)\n"),
759 (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD,
760 (unsigned long long) (quota - reserved - cache_size),
761 (unsigned long long) payload);
763 }
764}
static int status
The program status; 0 for success.
Definition: gnunet-nse.c:39
static void manage_space(unsigned long long need)
Manage available disk space by running tasks that will discard content if necessary.
void GNUNET_CONTAINER_bloomfilter_add(struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Add an element to the filter.
@ GNUNET_ERROR_TYPE_INFO

References _, cache_size, filter, 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, key, manage_space(), msg, payload, quota, reserved, size, stats, status, and transmit_status().

Referenced by handle_put().

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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
dmthe actual message
Returns
GNUNET_OK if dm is well-formed

Definition at line 775 of file gnunet-service-datastore.c.

776{
777 if (GNUNET_OK != check_data (dm))
778 {
779 GNUNET_break (0);
780 return GNUNET_SYSERR;
781 }
782 return GNUNET_OK;
783}
static int check_data(const struct DataMessage *dm)
Check that the given message is a valid data message.

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

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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
dmthe actual message

Definition at line 793 of file gnunet-service-datastore.c.

794{
795 struct GNUNET_SERVICE_Client *client = cls;
796 int rid;
797 struct ReservationList *pos;
798 uint32_t size;
799
801 "Processing PUT request for `%s' of type %u\n",
802 GNUNET_h2s (&dm->key),
803 (uint32_t) ntohl (dm->type));
804 rid = ntohl (dm->rid);
805 size = ntohl (dm->size);
806 if (rid > 0)
807 {
808 pos = reservations;
809 while ((NULL != pos) && (rid != pos->rid))
810 pos = pos->next;
811 GNUNET_break (pos != NULL);
812 if (NULL != pos)
813 {
814 GNUNET_break (pos->entries > 0);
815 GNUNET_break (pos->amount >= size);
816 pos->entries--;
817 pos->amount -= size;
820 gettext_noop ("# reserved"),
821 reserved,
822 GNUNET_NO);
823 }
824 }
825 bool absent =
827 plugin->api->put (plugin->api->cls,
828 &dm->key,
829 absent,
830 ntohl (dm->size),
831 &dm[1],
832 ntohl (dm->type),
833 ntohl (dm->priority),
834 ntohl (dm->anonymity),
835 ntohl (dm->replication),
838 client);
840}
static void put_continuation(void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
Put continuation.
bool GNUNET_CONTAINER_bloomfilter_test(const struct GNUNET_CONTAINER_BloomFilter *bf, const struct GNUNET_HashCode *e)
Test if an element is in the filter.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:737
PluginPut put
Function to store an item in the datastore.

References ReservationList::amount, DataMessage::anonymity, DatastorePlugin::api, ReservationList::client, GNUNET_DATASTORE_PluginFunctions::cls, ReservationList::entries, DataMessage::expiration, filter, 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, plugin, DataMessage::priority, GNUNET_DATASTORE_PluginFunctions::put, put_continuation(), DataMessage::replication, reservations, reserved, DataMessage::rid, ReservationList::rid, size, DataMessage::size, stats, and DataMessage::type.

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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 850 of file gnunet-service-datastore.c.

851{
852 struct GNUNET_SERVICE_Client *client = cls;
853
855 "Processing GET request of type %u\n",
856 (uint32_t) ntohl (msg->type));
858 gettext_noop ("# GET requests received"),
859 1,
860 GNUNET_NO);
862 GNUNET_ntohll (msg->next_uid),
863 msg->random,
864 NULL,
865 ntohl (msg->type),
867 client);
869}
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.
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
PluginGetKey get_key
Get a particular datum matching a given hash from the datastore.

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(), msg, plugin, stats, transmit_item(), and GNUNET_MessageHeader::type.

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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 879 of file gnunet-service-datastore.c.

880{
881 struct GNUNET_SERVICE_Client *client = cls;
882
884 "Processing GET request for `%s' of type %u\n",
885 GNUNET_h2s (&msg->key),
886 (uint32_t) ntohl (msg->type));
888 gettext_noop ("# GET KEY requests received"),
889 1,
890 GNUNET_NO);
892 {
893 /* don't bother database... */
895 "Empty result set for GET request for `%s' (bloomfilter).\n",
896 GNUNET_h2s (&msg->key));
899 "# requests filtered by bloomfilter"),
900 1,
901 GNUNET_NO);
902 transmit_item (client,
903 NULL,
904 0,
905 NULL,
906 0,
907 0,
908 0,
909 0,
911 0);
913 return;
914 }
916 GNUNET_ntohll (msg->next_uid),
917 msg->random,
918 &msg->key,
919 ntohl (msg->type),
921 client);
923}
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.

References DatastorePlugin::api, GNUNET_DATASTORE_PluginFunctions::cls, filter, 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, msg, plugin, stats, transmit_item(), and GNUNET_MessageHeader::type.

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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 933 of file gnunet-service-datastore.c.

934{
935 struct GNUNET_SERVICE_Client *client = cls;
936
937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing GET_REPLICATION request\n");
940 "# GET REPLICATION requests received"),
941 1,
942 GNUNET_NO);
945}
PluginGetRandom get_replication
Function to get a random item with high replication score from the database, lowering the item's repl...

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(), plugin, stats, and transmit_item().

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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
msgthe actual message

Definition at line 955 of file gnunet-service-datastore.c.

956{
957 struct GNUNET_SERVICE_Client *client = cls;
959
960 type = (enum GNUNET_BLOCK_Type) ntohl (msg->type);
962 {
963 GNUNET_break (0);
965 return;
966 }
968 "Processing GET_ZERO_ANONYMITY request\n");
971 "# GET ZERO ANONYMITY requests received"),
972 1,
973 GNUNET_NO);
975 GNUNET_ntohll (msg->next_uid),
976 type,
978 client);
980}
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2484
GNUNET_BLOCK_Type
WARNING: This header is generated! In order to add DHT block types, you must register them in GANA,...
@ GNUNET_BLOCK_TYPE_ANY
Identifier for any block.
PluginGetType get_zero_anonymity
Get datum (of the specified type) with anonymity level zero.

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(), msg, plugin, stats, transmit_item(), type, and GNUNET_MessageHeader::type.

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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 994 of file gnunet-service-datastore.c.

999{
1000 struct GNUNET_SERVICE_Client *client = cls;
1001
1002 if (GNUNET_SYSERR == status)
1003 {
1004 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "REMOVE request failed: %s.\n", msg);
1005 transmit_status (client, GNUNET_NO, msg);
1006 return;
1007 }
1008 if (GNUNET_NO == status)
1009 {
1011 "Content not found for REMOVE request.\n");
1012 transmit_status (client, GNUNET_NO, _ ("Content not found"));
1013 return;
1014 }
1016 "Item matches REMOVE request for key `%s'.\n",
1017 GNUNET_h2s (key));
1019 gettext_noop ("# bytes removed (explicit request)"),
1020 size,
1021 GNUNET_YES);
1023 transmit_status (client, GNUNET_OK, NULL);
1024}
@ GNUNET_ERROR_TYPE_ERROR

References _, filter, 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, key, msg, size, stats, status, and transmit_status().

Referenced by handle_remove().

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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
dmthe actual message
Returns
GNUNET_OK if dm is well-formed

Definition at line 1035 of file gnunet-service-datastore.c.

1036{
1037 if (GNUNET_OK != check_data (dm))
1038 {
1039 GNUNET_break (0);
1040 return GNUNET_SYSERR;
1041 }
1042 return GNUNET_OK;
1043}

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

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◆ handle_remove()

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

Handle REMOVE-message.

Parameters
clsclosure
dmthe actual message

Definition at line 1053 of file gnunet-service-datastore.c.

1054{
1055 struct GNUNET_SERVICE_Client *client = cls;
1056
1058 gettext_noop ("# REMOVE requests received"),
1059 1,
1060 GNUNET_NO);
1062 "Processing REMOVE request for `%s'\n",
1063 GNUNET_h2s (&dm->key));
1065 &dm->key,
1066 ntohl (dm->size),
1067 &dm[1],
1069 client);
1071}
static void remove_continuation(void *cls, const struct GNUNET_HashCode *key, uint32_t size, int status, const char *msg)
Remove continuation.
PluginRemoveKey remove_key
Function to remove an item from the database.

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, plugin, remove_continuation(), GNUNET_DATASTORE_PluginFunctions::remove_key, DataMessage::size, and stats.

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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 1081 of file gnunet-service-datastore.c.

1083{
1084 struct GNUNET_SERVICE_Client *client = cls;
1085
1087 "Processing DROP request\n");
1090}
static int do_drop
Should the database be dropped on exit?

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

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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 1102 of file gnunet-service-datastore.c.

1103{
1104 if ((delta < 0) && (payload < -delta))
1105 {
1106 GNUNET_log (
1108 _ (
1109 "Datastore payload must have been inaccurate (%lld < %lld). Recomputing it.\n"),
1110 (long long) payload,
1111 (long long) -delta);
1114 _ ("New payload: %lld\n"),
1115 (long long) payload);
1116 sync_stats ();
1117 return;
1118 }
1119 payload += delta;
1120 last_sync++;
1122 sync_stats ();
1123}
#define MAX_STAT_SYNC_LAG
After how many payload-changing operations do we sync our statistics?
static void sync_stats()
Synchronize our utilization statistics with the statistics service.
static struct GNUNET_TIME_Relative delta
Definition: speedup.c:36
PluginEstimateSize estimate_size
Calculate the current on-disk size of the SQ store.

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, plugin, and sync_stats().

Referenced by load_plugin().

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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 1137 of file gnunet-service-datastore.c.

1142{
1145 payload += value;
1146 GNUNET_log (
1148 "Notification from statistics about existing payload (%llu), new payload is %llu\n",
1149 (unsigned long long) value,
1150 (unsigned long long) payload);
1151 return GNUNET_OK;
1152}
static char * value
Value of the record to add/remove.
static int stats_worked
Did we get an answer from statistics?

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

Referenced by run().

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◆ load_plugin()

static struct DatastorePlugin * load_plugin ( )
static

Load the datastore plugin.

Definition at line 1159 of file gnunet-service-datastore.c.

1160{
1161 struct DatastorePlugin *ret;
1162 char *libname;
1163
1164 ret = GNUNET_new (struct DatastorePlugin);
1165 ret->env.cfg = cfg;
1166 ret->env.duc = &disk_utilization_change_cb;
1167 ret->env.cls = NULL;
1169 _ ("Loading `%s' datastore plugin\n"),
1170 plugin_name);
1171 GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", plugin_name);
1172 ret->short_name = GNUNET_strdup (plugin_name);
1173 ret->lib_name = libname;
1174 ret->api = GNUNET_PLUGIN_load (libname, &ret->env);
1175 if (NULL == ret->api)
1176 {
1178 _ ("Failed to load datastore plugin for `%s'\n"),
1179 plugin_name);
1180 GNUNET_free (ret->short_name);
1181 GNUNET_free (libname);
1182 GNUNET_free (ret);
1183 return NULL;
1184 }
1185 return ret;
1186}
static int ret
Final status code.
Definition: gnunet-arm.c:94
static char * plugin_name
Name of our plugin.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
static void disk_utilization_change_cb(void *cls, int delta)
Function called by plugins to notify us about a change in their disk utilization.
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
void * GNUNET_PLUGIN_load(const char *library_name, void *arg)
Setup plugin (runs the "init" callback and returns whatever "init" returned).
Definition: plugin.c:198
Our datastore plugin.

References _, cfg, disk_utilization_change_cb(), GNUNET_asprintf(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log, GNUNET_new, GNUNET_PLUGIN_load(), GNUNET_strdup, plugin_name, and ret.

Referenced by process_stat_done().

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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 1196 of file gnunet-service-datastore.c.

1197{
1199 "Datastore service is unloading plugin...\n");
1200 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
1201 GNUNET_free (plug->lib_name);
1202 GNUNET_free (plug->short_name);
1203 GNUNET_free (plug);
1204}
void * GNUNET_PLUGIN_unload(const char *library_name, void *arg)
Unload plugin (runs the "done" callback and returns whatever "done" returned).
Definition: plugin.c:242
char * lib_name
Name of the library (e.g.
char * short_name
Short name for the plugin (e.g.

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().

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◆ begin_service()

static void begin_service ( )
static

Initialization complete, start operating the service.

Definition at line 1211 of file gnunet-service-datastore.c.

1212{
1217 NULL);
1218}
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:1232
void GNUNET_SERVICE_resume(struct GNUNET_SERVICE_Handle *sh)
Resume accepting connections from the listen socket.
Definition: service.c:2410

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

Referenced by add_key_to_bloomfilter(), and process_stat_done().

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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 1229 of file gnunet-service-datastore.c.

1232{
1233 struct GNUNET_CONTAINER_BloomFilter *bf = cls;
1234
1235 if (NULL == key)
1236 {
1238 _ ("Bloomfilter construction complete.\n"));
1239 begin_service ();
1240 return;
1241 }
1242
1243 while (0 < count--)
1245}
static void begin_service()
Initialization complete, start operating the service.

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

Referenced by process_stat_done().

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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 1256 of file gnunet-service-datastore.c.

1257{
1258 stat_get = NULL;
1259 if (NULL != stat_timeout_task)
1260 {
1262 stat_timeout_task = NULL;
1263 }
1264 plugin = load_plugin ();
1265 if (NULL == plugin)
1266 {
1268 filter = NULL;
1269 if (NULL != stats)
1270 {
1272 stats = NULL;
1273 }
1274 return;
1275 }
1276
1277 if (GNUNET_NO == stats_worked)
1278 {
1280 "Failed to obtain value from statistics service, recomputing it\n");
1283 _ ("New payload: %lld\n"),
1284 (long long) payload);
1285 }
1286
1287 if (GNUNET_YES == refresh_bf)
1288 {
1290 _ ("Rebuilding bloomfilter. Please be patient.\n"));
1291 if (NULL != plugin->api->get_keys)
1292 {
1294 return;
1295 }
1296 else
1297 {
1299 _ (
1300 "Plugin does not support get_keys function. Please fix!\n"));
1301 }
1302 }
1303 begin_service ();
1304}
static struct GNUNET_STATISTICS_GetHandle * stat_get
Handle for pending get request.
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.
static struct GNUNET_SCHEDULER_Task * stat_timeout_task
Task to timeout stat GET.
static int refresh_bf
Should we refresh the BF when the DB is loaded?
static struct DatastorePlugin * load_plugin()
Load the datastore plugin.
void GNUNET_CONTAINER_bloomfilter_free(struct GNUNET_CONTAINER_BloomFilter *bf)
Free the space associated with a filter in memory, flush to drive if needed (do not free the space on...
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:981
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
PluginGetKeys get_keys
Iterate over all keys in the database.

References _, add_key_to_bloomfilter(), DatastorePlugin::api, begin_service(), GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::estimate_size, filter, 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, plugin, refresh_bf, stat_get, stat_timeout_task, stats, and stats_worked.

Referenced by run(), and stat_timeout().

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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 1313 of file gnunet-service-datastore.c.

1314{
1315 stat_timeout_task = NULL;
1318}
static void process_stat_done(void *cls, int success)
We finished receiving the statistic.
void GNUNET_STATISTICS_get_cancel(struct GNUNET_STATISTICS_GetHandle *gh)
Cancel a GNUNET_STATISTICS_get request.

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

Referenced by run().

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◆ cleaning_task()

static void cleaning_task ( void *  cls)
static

Task run during shutdown.

Definition at line 1325 of file gnunet-service-datastore.c.

1326{
1328 if (NULL != expired_kill_task)
1329 {
1331 expired_kill_task = NULL;
1332 }
1333 if (GNUNET_YES == do_drop)
1334 {
1336 "Dropping database!\n");
1337 plugin->api->drop (plugin->api->cls);
1338 payload = 0;
1339 last_sync++;
1340 }
1341 if (NULL != plugin)
1342 {
1344 plugin = NULL;
1345 }
1346 if (NULL != filter)
1347 {
1349 filter = NULL;
1350 }
1351 if (NULL != stat_get)
1352 {
1354 stat_get = NULL;
1355 }
1356 if (NULL != stat_timeout_task)
1357 {
1359 stat_timeout_task = NULL;
1360 }
1362 plugin_name = NULL;
1363 if (last_sync > 0)
1364 sync_stats ();
1365 if (NULL != stats)
1366 {
1368 stats = NULL;
1369 }
1371 quota_stat_name = NULL;
1372}
static int cleaning_done
Have we already cleaned up the TCCs and are hence no longer willing (or able) to transmit anything to...
static void unload_plugin(struct DatastorePlugin *plug)
Function called when the service shuts down.
PluginDrop drop
Delete the database.

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

Referenced by run().

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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 1384 of file gnunet-service-datastore.c.

1387{
1388 return client;
1389}

◆ 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 1401 of file gnunet-service-datastore.c.

1404{
1405 struct ReservationList *pos;
1406 struct ReservationList *prev;
1407 struct ReservationList *next;
1408
1409 GNUNET_assert (app_ctx == client);
1410 prev = NULL;
1411 pos = reservations;
1412 while (NULL != pos)
1413 {
1414 next = pos->next;
1415 if (pos->client == client)
1416 {
1417 if (NULL == prev)
1419 else
1420 prev->next = next;
1422 GNUNET_free (pos);
1423 }
1424 else
1425 {
1426 prev = pos;
1427 }
1428 pos = next;
1429 }
1431 gettext_noop ("# reserved"),
1432 reserved,
1433 GNUNET_NO);
1434}

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, reserved, and stats.

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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 1445 of file gnunet-service-datastore.c.

1448{
1449 char *fn;
1450 char *pfn;
1451 unsigned int bf_size;
1452
1453 service = serv;
1454 cfg = c;
1456 "DATASTORE",
1457 "DATABASE",
1458 &plugin_name))
1459 {
1461 "DATABASE",
1462 "DATASTORE");
1463 return;
1464 }
1466 _ ("# bytes used in file-sharing datastore `%s'"),
1467 plugin_name);
1468 if (GNUNET_OK !=
1469 GNUNET_CONFIGURATION_get_value_size (cfg, "DATASTORE", "QUOTA", &quota))
1470 {
1471 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "QUOTA", "DATASTORE");
1472 return;
1473 }
1474 stats = GNUNET_STATISTICS_create ("datastore", cfg);
1476 cache_size = quota / 8; /* Or should we make this an option? */
1478 gettext_noop ("# cache size"),
1479 cache_size,
1480 GNUNET_NO);
1481 if (quota / (32 * 1024LL) > MAX_BF_SIZE)
1482 bf_size = MAX_BF_SIZE;
1483 else
1484 bf_size =
1485 quota / (32 * 1024LL); /* 8 bit per entry, 1 bit per 32 kb in DB */
1486 fn = NULL;
1488 "DATASTORE",
1489 "BLOOMFILTER",
1490 &fn)) ||
1492 {
1494 _ ("Could not use specified filename `%s' for bloomfilter.\n"),
1495 NULL != fn ? fn : "");
1496 GNUNET_free (fn);
1497 fn = NULL;
1498 }
1499 if (NULL != fn)
1500 {
1501 GNUNET_asprintf (&pfn, "%s.%s", fn, plugin_name);
1502 if (GNUNET_YES == GNUNET_DISK_file_test (pfn))
1503 {
1504 filter =
1506 bf_size,
1507 5); /* approx. 3% false positives at max use */
1508 if (NULL == filter)
1509 {
1510 /* file exists but not valid, remove and try again, but refresh */
1511 if (0 != unlink (pfn))
1512 {
1513 /* failed to remove, run without file */
1515 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1516 pfn);
1517 GNUNET_free (pfn);
1518 pfn = NULL;
1520 NULL,
1521 bf_size,
1522 5); /* approx. 3% false positives at max use */
1524 }
1525 else
1526 {
1527 /* try again after remove */
1529 pfn,
1530 bf_size,
1531 5); /* approx. 3% false positives at max use */
1533 if (NULL == filter)
1534 {
1535 /* failed yet again, give up on using file */
1537 _ ("Failed to remove bogus bloomfilter file `%s'\n"),
1538 pfn);
1539 GNUNET_free (pfn);
1540 pfn = NULL;
1542 NULL,
1543 bf_size,
1544 5); /* approx. 3% false positives at max use */
1545 }
1546 }
1547 }
1548 else
1549 {
1550 /* normal case: have an existing valid bf file, no need to refresh */
1552 }
1553 }
1554 else
1555 {
1556 filter =
1558 bf_size,
1559 5); /* approx. 3% false positives at max use */
1561 }
1562 GNUNET_free (pfn);
1563 }
1564 else
1565 {
1566 filter =
1568 bf_size,
1569 5); /* approx. 3% false positives at max use */
1571 }
1572 GNUNET_free (fn);
1573 if (NULL == filter)
1574 {
1576 _ ("Failed to initialize bloomfilter.\n"));
1577 if (NULL != stats)
1578 {
1580 stats = NULL;
1581 }
1582 return;
1583 }
1586 "datastore",
1590 NULL);
1591 if (NULL == stat_get)
1593 else
1595 &stat_timeout,
1596 NULL);
1598}
static void stat_timeout(void *cls)
Fetching stats took to long, run without.
static void cleaning_task(void *cls)
Task run during shutdown.
#define MAX_BF_SIZE
Limit size of bloom filter to 2 GB.
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.
struct GNUNET_CONTAINER_BloomFilter * GNUNET_CONTAINER_bloomfilter_init(const char *data, size_t size, unsigned int k)
Create a Bloom filter from raw bits.
struct GNUNET_CONTAINER_BloomFilter * GNUNET_CONTAINER_bloomfilter_load(const char *filename, size_t size, unsigned int k)
Load a Bloom filter from a file.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue 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:482
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:582
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
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,...
Definition: scheduler.c:1340
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:1278
void GNUNET_SERVICE_suspend(struct GNUNET_SERVICE_Handle *sh)
Suspend accepting connections from the listen socket temporarily.
Definition: service.c:2402
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
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_TIME_UNIT_SECONDS
One second.

References _, cache_size, cfg, cleaning_task(), filter, 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_log, GNUNET_log_config_missing(), GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_shutdown(), 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, service, stat_get, stat_timeout(), stat_timeout_task, and stats.

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◆ GNUNET_SERVICE_MAIN()

Variable Documentation

◆ quota_stat_name

char* quota_stat_name
static

Name under which we store current space consumption.

Definition at line 61 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 66 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), process_stat_done(), run(), and stat_timeout().

◆ plugin

◆ reservations

struct ReservationList* reservations
static

Linked list of space reservations made by clients.

Definition at line 144 of file gnunet-service-datastore.c.

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

◆ filter

◆ plugin_name

char* plugin_name
static

Name of our plugin.

Definition at line 154 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 159 of file gnunet-service-datastore.c.

Referenced by load_plugin(), and run().

◆ stats

◆ 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 172 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 177 of file gnunet-service-datastore.c.

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

◆ payload

◆ 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 189 of file gnunet-service-datastore.c.

Referenced by begin_service(), cleaning_task(), delete_expired(), and expired_processor().

◆ 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 197 of file gnunet-service-datastore.c.

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

◆ quota

unsigned long long quota
static

How much space are we allowed to use?

Definition at line 202 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 207 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 212 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 219 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 224 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 247 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 252 of file gnunet-service-datastore.c.

Referenced by cleaning_task(), process_stat_done(), run(), and stat_timeout().

◆ service

struct GNUNET_SERVICE_Handle* service
static

Handle to our server.

Definition at line 257 of file gnunet-service-datastore.c.

Referenced by begin_service(), and run().