GNUnet  0.10.x
Data Structures | Macros | Functions
plugin_datastore_postgres.c File Reference

postgres-based datastore backend More...

#include "platform.h"
#include "gnunet_datastore_plugin.h"
#include "gnunet_pq_lib.h"
Include dependency graph for plugin_datastore_postgres.c:

Go to the source code of this file.

Data Structures

struct  Plugin
 Handle for a plugin. More...
 
struct  ProcessResultContext
 Closure for process_result. More...
 
struct  ReplCtx
 Context for repl_proc() function. More...
 
struct  ProcessKeysContext
 Closure for process_keys. More...
 

Macros

#define BUSY_TIMEOUT   GNUNET_TIME_UNIT_SECONDS
 After how many ms "busy" should a DB operation fail for good? A low value makes sure that we are more responsive to requests (especially PUTs). More...
 
#define RESULT_COLUMNS   "repl, type, prio, anonLevel, expire, hash, value, oid"
 

Functions

static int init_connection (struct Plugin *plugin)
 Get a database handle. More...
 
static void postgres_plugin_estimate_size (void *cls, unsigned long long *estimate)
 Get an estimate of how much space the database is currently using. More...
 
static void postgres_plugin_put (void *cls, const struct GNUNET_HashCode *key, bool absent, 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, PluginPutCont cont, void *cont_cls)
 Store an item in the datastore. More...
 
static void process_result (void *cls, PGresult *res, unsigned int num_results)
 Function invoked to process the result and call the processor of cls. More...
 
static void postgres_plugin_get_key (void *cls, uint64_t next_uid, bool random, const struct GNUNET_HashCode *key, enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc, void *proc_cls)
 Get one of the results for a particular key in the datastore. More...
 
static void postgres_plugin_get_zero_anonymity (void *cls, uint64_t next_uid, enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc, void *proc_cls)
 Select a subset of the items in the datastore and call the given iterator for each of them. More...
 
static int repl_proc (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)
 Wrapper for the iterator for 'sqlite_plugin_replication_get'. More...
 
static void postgres_plugin_get_replication (void *cls, PluginDatumProcessor proc, void *proc_cls)
 Get a random item for replication. More...
 
static void postgres_plugin_get_expiration (void *cls, PluginDatumProcessor proc, void *proc_cls)
 Get a random item for expiration. More...
 
static void process_keys (void *cls, PGresult *result, unsigned int num_results)
 Function to be called with the results of a SELECT statement that has returned num_results results. More...
 
static void postgres_plugin_get_keys (void *cls, PluginKeyProcessor proc, void *proc_cls)
 Get all of the keys in the datastore. More...
 
static void postgres_plugin_drop (void *cls)
 Drop database. More...
 
static void postgres_plugin_remove_key (void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, PluginRemoveCont cont, void *cont_cls)
 Remove a particular key in the datastore. More...
 
void * libgnunet_plugin_datastore_postgres_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_datastore_postgres_done (void *cls)
 Exit point from the plugin. More...
 

Detailed Description

postgres-based datastore backend

Author
Christian Grothoff

Definition in file plugin_datastore_postgres.c.

Macro Definition Documentation

◆ BUSY_TIMEOUT

#define BUSY_TIMEOUT   GNUNET_TIME_UNIT_SECONDS

After how many ms "busy" should a DB operation fail for good? A low value makes sure that we are more responsive to requests (especially PUTs).

A high value guarantees a higher success rate (SELECTs in iterate can take several seconds despite LIMIT=1).

The default value of 1s should ensure that users do not experience huge latencies while at the same time allowing operations to succeed with reasonable probability.

Definition at line 41 of file plugin_datastore_postgres.c.

◆ RESULT_COLUMNS

#define RESULT_COLUMNS   "repl, type, prio, anonLevel, expire, hash, value, oid"

Referenced by init_connection().

Function Documentation

◆ init_connection()

static int init_connection ( struct Plugin plugin)
static

Get a database handle.

Parameters
pluginglobal context
Returns
GNUNET_OK on success, GNUNET_SYSERR on error

Definition at line 67 of file plugin_datastore_postgres.c.

References GNUNET_DATACACHE_PluginEnvironment::cfg, Plugin::dbh, Plugin::env, GNUNET_OK, GNUNET_PQ_connect_with_cfg(), GNUNET_PQ_exec_statements(), GNUNET_PQ_EXECUTE_STATEMENT_END, GNUNET_PQ_make_execute(), GNUNET_PQ_make_prepare(), GNUNET_PQ_make_try_execute(), GNUNET_PQ_prepare_statements(), GNUNET_PQ_PREPARED_STATEMENT_END, GNUNET_SYSERR, and RESULT_COLUMNS.

Referenced by libgnunet_plugin_datastore_postgres_init().

68 {
69  struct GNUNET_PQ_ExecuteStatement es[] = {
70  /* FIXME: PostgreSQL does not have unsigned integers! This is ok for the type column because
71  * we only test equality on it and can cast it to/from uint32_t. For repl, prio, and anonLevel
72  * we do math or inequality tests, so we can't handle the entire range of uint32_t.
73  * This will also cause problems for expiration times after 294247-01-10-04:00:54 UTC.
74  * PostgreSQL also recommends against using WITH OIDS.
75  */
76  GNUNET_PQ_make_execute("CREATE TABLE IF NOT EXISTS gn090 ("
77  " repl INTEGER NOT NULL DEFAULT 0,"
78  " type INTEGER NOT NULL DEFAULT 0,"
79  " prio INTEGER NOT NULL DEFAULT 0,"
80  " anonLevel INTEGER NOT NULL DEFAULT 0,"
81  " expire BIGINT NOT NULL DEFAULT 0,"
82  " rvalue BIGINT NOT NULL DEFAULT 0,"
83  " hash BYTEA NOT NULL DEFAULT '',"
84  " vhash BYTEA NOT NULL DEFAULT '',"
85  " value BYTEA NOT NULL DEFAULT '')"
86  "WITH OIDS"),
87  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_hash ON gn090 (hash)"),
88  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_prio ON gn090 (prio)"),
89  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_expire ON gn090 (expire)"),
90  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_prio_anon ON gn090 (prio,anonLevel)"),
91  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_prio_hash_anon ON gn090 (prio,hash,anonLevel)"),
92  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_repl_rvalue ON gn090 (repl,rvalue)"),
93  GNUNET_PQ_make_try_execute("CREATE INDEX IF NOT EXISTS idx_expire_hash ON gn090 (expire,hash)"),
94  GNUNET_PQ_make_execute("ALTER TABLE gn090 ALTER value SET STORAGE EXTERNAL"),
95  GNUNET_PQ_make_execute("ALTER TABLE gn090 ALTER hash SET STORAGE PLAIN"),
96  GNUNET_PQ_make_execute("ALTER TABLE gn090 ALTER vhash SET STORAGE PLAIN"),
98  };
99 
100 #define RESULT_COLUMNS "repl, type, prio, anonLevel, expire, hash, value, oid"
101  struct GNUNET_PQ_PreparedStatement ps[] = {
103  "SELECT " RESULT_COLUMNS " FROM gn090"
104  " WHERE oid >= $1::bigint AND"
105  " (rvalue >= $2 OR 0 = $3::smallint) AND"
106  " (hash = $4 OR 0 = $5::smallint) AND"
107  " (type = $6 OR 0 = $7::smallint)"
108  " ORDER BY oid ASC LIMIT 1",
109  7),
111  "INSERT INTO gn090 (repl, type, prio, anonLevel, expire, rvalue, hash, vhash, value) "
112  "VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)",
113  9),
114  GNUNET_PQ_make_prepare("update",
115  "UPDATE gn090"
116  " SET prio = prio + $1,"
117  " repl = repl + $2,"
118  " expire = GREATEST(expire, $3)"
119  " WHERE hash = $4 AND vhash = $5",
120  5),
121  GNUNET_PQ_make_prepare("decrepl",
122  "UPDATE gn090 SET repl = GREATEST (repl - 1, 0) "
123  "WHERE oid = $1",
124  1),
125  GNUNET_PQ_make_prepare("select_non_anonymous",
126  "SELECT " RESULT_COLUMNS " FROM gn090 "
127  "WHERE anonLevel = 0 AND type = $1 AND oid >= $2::bigint "
128  "ORDER BY oid ASC LIMIT 1",
129  2),
130  GNUNET_PQ_make_prepare("select_expiration_order",
131  "(SELECT " RESULT_COLUMNS " FROM gn090 "
132  "WHERE expire < $1 ORDER BY prio ASC LIMIT 1) "
133  "UNION "
134  "(SELECT " RESULT_COLUMNS " FROM gn090 "
135  "ORDER BY prio ASC LIMIT 1) "
136  "ORDER BY expire ASC LIMIT 1",
137  1),
138  GNUNET_PQ_make_prepare("select_replication_order",
139  "SELECT " RESULT_COLUMNS " FROM gn090 "
140  "ORDER BY repl DESC,RANDOM() LIMIT 1",
141  0),
142  GNUNET_PQ_make_prepare("delrow",
143  "DELETE FROM gn090 "
144  "WHERE oid=$1",
145  1),
146  GNUNET_PQ_make_prepare("remove",
147  "DELETE FROM gn090"
148  " WHERE hash = $1 AND"
149  " value = $2",
150  2),
151  GNUNET_PQ_make_prepare("get_keys",
152  "SELECT hash FROM gn090",
153  0),
154  GNUNET_PQ_make_prepare("estimate_size",
155  "SELECT CASE WHEN NOT EXISTS"
156  " (SELECT 1 FROM gn090)"
157  " THEN 0"
158  " ELSE (SELECT SUM(LENGTH(value))+256*COUNT(*) FROM gn090)"
159  "END AS total",
160  0),
162  };
163 #undef RESULT_COLUMNS
164 
165  plugin->dbh = GNUNET_PQ_connect_with_cfg(plugin->env->cfg,
166  "datastore-postgres");
167  if (NULL == plugin->dbh)
168  return GNUNET_SYSERR;
169 
170  if ((GNUNET_OK !=
172  es)) ||
173  (GNUNET_OK !=
175  ps)))
176  {
177  PQfinish(plugin->dbh);
178  plugin->dbh = NULL;
179  return GNUNET_SYSERR;
180  }
181  return GNUNET_OK;
182 }
struct GNUNET_PQ_ExecuteStatement GNUNET_PQ_make_execute(const char *sql)
Create a struct GNUNET_PQ_ExecuteStatement where errors are fatal.
Definition: pq_exec.c:37
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration to use.
Information needed to run a list of SQL statements using GNUNET_PQ_exec_statements().
Information needed to prepare a list of SQL statements using GNUNET_PQ_prepare_statements().
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
int GNUNET_PQ_prepare_statements(PGconn *connection, const struct GNUNET_PQ_PreparedStatement *ps)
Request creation of prepared statements ps from Postgres.
Definition: pq_prepare.c:63
struct GNUNET_DATACACHE_PluginEnvironment * env
Our execution environment.
PGconn * GNUNET_PQ_connect_with_cfg(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section)
Connect to a postgres database using the configuration option "CONFIG" in section.
Definition: pq_connect.c:112
#define GNUNET_PQ_PREPARED_STATEMENT_END
Terminator for prepared statement list.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
int GNUNET_PQ_exec_statements(PGconn *connection, const struct GNUNET_PQ_ExecuteStatement *es)
Request execution of an array of statements es from Postgres.
Definition: pq_exec.c:77
#define RESULT_COLUMNS
PGconn * dbh
Native Postgres database handle.
#define GNUNET_PQ_EXECUTE_STATEMENT_END
Terminator for executable statement list.
struct GNUNET_PQ_ExecuteStatement GNUNET_PQ_make_try_execute(const char *sql)
Create a struct GNUNET_PQ_ExecuteStatement where errors should be tolerated.
Definition: pq_exec.c:56
struct GNUNET_PQ_PreparedStatement GNUNET_PQ_make_prepare(const char *name, const char *sql, unsigned int num_args)
Create a struct GNUNET_PQ_PreparedStatement.
Definition: pq_prepare.c:39
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◆ postgres_plugin_estimate_size()

static void postgres_plugin_estimate_size ( void *  cls,
unsigned long long *  estimate 
)
static

Get an estimate of how much space the database is currently using.

Parameters
clsour struct Plugin *
Returns
number of bytes used on disk

Definition at line 193 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_DB_STATUS_SUCCESS_ONE_RESULT, GNUNET_PQ_eval_prepared_singleton_select(), GNUNET_PQ_query_param_end, GNUNET_PQ_result_spec_end, GNUNET_PQ_result_spec_uint64(), plugin, and ret.

Referenced by libgnunet_plugin_datastore_postgres_init().

195 {
196  struct Plugin *plugin = cls;
197  uint64_t total;
198  struct GNUNET_PQ_QueryParam params[] = {
200  };
201  struct GNUNET_PQ_ResultSpec rs[] = {
203  &total),
205  };
207 
208  if (NULL == estimate)
209  return;
211  "estimate_size",
212  params,
213  rs);
215  {
216  *estimate = 0LL;
217  return;
218  }
219  *estimate = total;
220 }
Description of a DB result cell.
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_singleton_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, struct GNUNET_PQ_ResultSpec *rs)
Execute a named prepared statement that is a SELECT statement which must return a single result in co...
Definition: pq_eval.c:241
static int ret
Final status code.
Definition: gnunet-arm.c:89
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_result_spec_end
End of result parameter specification.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
The transaction succeeded, and yielded one result.
Definition: gnunet_db_lib.h:57
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
struct GNUNET_PQ_ResultSpec GNUNET_PQ_result_spec_uint64(const char *name, uint64_t *u64)
uint64_t expected.
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◆ postgres_plugin_put()

static void postgres_plugin_put ( void *  cls,
const struct GNUNET_HashCode key,
bool  absent,
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,
PluginPutCont  cont,
void *  cont_cls 
)
static

Store an item in the datastore.

Parameters
clsclosure with the struct Plugin
keykey for the item
absenttrue if the key was not found in the bloom filter
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
contcontinuation called with success or failure status
cont_clscontinuation closure

Definition at line 240 of file plugin_datastore_postgres.c.

References _, GNUNET_DATACACHE_PluginEnvironment::cls, Plugin::dbh, Plugin::env, GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u64(), GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log_from, GNUNET_NO, GNUNET_OK, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_absolute_time(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_fixed_size(), GNUNET_PQ_query_param_uint32(), GNUNET_PQ_query_param_uint64(), GNUNET_SYSERR, plugin, and ret.

Referenced by libgnunet_plugin_datastore_postgres_init().

252 {
253  struct Plugin *plugin = cls;
254  struct GNUNET_HashCode vhash;
256 
258  size,
259  &vhash);
260  if (!absent)
261  {
262  struct GNUNET_PQ_QueryParam params[] = {
263  GNUNET_PQ_query_param_uint32(&priority),
269  };
271  "update",
272  params);
273  if (0 > ret)
274  {
275  cont(cont_cls,
276  key,
277  size,
279  _("Postgress exec failure"));
280  return;
281  }
282  bool affected = (0 != ret);
283  if (affected)
284  {
285  cont(cont_cls,
286  key,
287  size,
288  GNUNET_NO,
289  NULL);
290  return;
291  }
292  }
293 
294  {
295  uint32_t utype = (uint32_t)type;
297  UINT64_MAX);
298  struct GNUNET_PQ_QueryParam params[] = {
301  GNUNET_PQ_query_param_uint32(&priority),
309  };
310 
312  "put",
313  params);
314  if (0 > ret)
315  {
316  cont(cont_cls,
317  key,
318  size,
320  "Postgress exec failure");
321  return;
322  }
323  }
324  plugin->env->duc(plugin->env->cls,
327  "datastore-postgres",
328  "Stored %u bytes in database\n",
329  (unsigned int)size);
330  cont(cont_cls,
331  key,
332  size,
333  GNUNET_OK,
334  NULL);
335 }
uint64_t GNUNET_CRYPTO_random_u64(enum GNUNET_CRYPTO_Quality mode, uint64_t max)
Random on unsigned 64-bit values.
static unsigned int replication
#define GNUNET_NO
Definition: gnunet_common.h:78
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_absolute_time(const struct GNUNET_TIME_Absolute *x)
Generate query parameter for an absolute time value.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:151
static int ret
Final status code.
Definition: gnunet-arm.c:89
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
struct GNUNET_DATACACHE_PluginEnvironment * env
Our execution environment.
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint32(const uint32_t *x)
Generate query parameter for an uint32_t in host byte order.
A 512-bit hashcode.
#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:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint64(const uint64_t *x)
Generate query parameter for an uint16_t in host byte order.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_fixed_size(const void *ptr, size_t ptr_size)
Generate query parameter for a buffer ptr of ptr_size bytes.
void * cls
Closure to use for callbacks.
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
static unsigned int anonymity
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
#define GNUNET_log_from(kind, comp,...)
uint32_t data
The data value.
No good quality of the operation is needed (i.e., random numbers can be pseudo-random).
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◆ process_result()

static void process_result ( void *  cls,
PGresult *  res,
unsigned int  num_results 
)
static

Function invoked to process the result and call the processor of cls.

Parameters
clsour struct ProcessResultContext
resresult from exec
num_resultsnumber of results in res

Definition at line 368 of file plugin_datastore_postgres.c.

References anonymity, GNUNET_DATACACHE_PluginEnvironment::cls, data, Plugin::dbh, Plugin::env, GNUNET_break, GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_log_from, GNUNET_NO, GNUNET_OK, GNUNET_PQ_cleanup_result(), GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_extract_result(), GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_uint32(), GNUNET_PQ_result_spec_absolute_time(), GNUNET_PQ_result_spec_auto_from_type, GNUNET_PQ_result_spec_end, GNUNET_PQ_result_spec_uint32(), GNUNET_PQ_result_spec_variable_size(), GNUNET_TIME_UNIT_ZERO_ABS, plugin, ProcessResultContext::plugin, ProcessResultContext::proc, ProcessResultContext::proc_cls, replication, and Plugin::size.

Referenced by postgres_plugin_get_expiration(), postgres_plugin_get_key(), postgres_plugin_get_replication(), and postgres_plugin_get_zero_anonymity().

371 {
372  struct ProcessResultContext *prc = cls;
373  struct Plugin *plugin = prc->plugin;
374 
375  if (0 == num_results)
376  {
377  /* no result */
379  "datastore-postgres",
380  "Ending iteration (no more results)\n");
381  prc->proc(prc->proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
383  return;
384  }
385  if (1 != num_results)
386  {
387  GNUNET_break(0);
388  prc->proc(prc->proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
390  return;
391  }
392  /* Technically we don't need the loop here, but nicer in case
393  we ever relax the condition above. */
394  for (unsigned int i = 0; i < num_results; i++)
395  {
396  int iret;
397  uint32_t rowid;
398  uint32_t utype;
399  uint32_t anonymity;
400  uint32_t replication;
401  uint32_t priority;
402  size_t size;
403  void *data;
404  struct GNUNET_TIME_Absolute expiration_time;
405  struct GNUNET_HashCode key;
406  struct GNUNET_PQ_ResultSpec rs[] = {
407  GNUNET_PQ_result_spec_uint32("repl", &replication),
408  GNUNET_PQ_result_spec_uint32("type", &utype),
409  GNUNET_PQ_result_spec_uint32("prio", &priority),
410  GNUNET_PQ_result_spec_uint32("anonLevel", &anonymity),
411  GNUNET_PQ_result_spec_absolute_time("expire", &expiration_time),
413  GNUNET_PQ_result_spec_variable_size("value", &data, &size),
414  GNUNET_PQ_result_spec_uint32("oid", &rowid),
416  };
417 
418  if (GNUNET_OK !=
420  rs,
421  i))
422  {
423  GNUNET_break(0);
424  prc->proc(prc->proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
426  return;
427  }
428 
430  "datastore-postgres",
431  "Found result of size %u bytes and type %u in database\n",
432  (unsigned int)size,
433  (unsigned int)utype);
434  iret = prc->proc(prc->proc_cls,
435  &key,
436  size,
437  data,
438  (enum GNUNET_BLOCK_Type)utype,
439  priority,
440  anonymity,
441  replication,
442  expiration_time,
443  rowid);
444  if (iret == GNUNET_NO)
445  {
446  struct GNUNET_PQ_QueryParam param[] = {
449  };
450 
452  "Processor asked for item %u to be removed.\n",
453  (unsigned int)rowid);
454  if (0 <
456  "delrow",
457  param))
458  {
460  "datastore-postgres",
461  "Deleting %u bytes from database\n",
462  (unsigned int)size);
463  plugin->env->duc(plugin->env->cls,
466  "datastore-postgres",
467  "Deleted %u bytes from database\n",
468  (unsigned int)size);
469  }
470  }
472  } /* for (i) */
473 }
PluginDatumProcessor proc
Function to call on each result.
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.
GNUNET_BLOCK_Type
Blocks in the datastore and the datacache must have a unique type.
static unsigned int replication
Description of a DB result cell.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
struct Plugin * plugin
The plugin handle.
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:151
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_result_spec_end
End of result parameter specification.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
struct GNUNET_PQ_ResultSpec GNUNET_PQ_result_spec_variable_size(const char *name, void **dst, size_t *sptr)
Variable-size result expected.
struct GNUNET_PQ_ResultSpec GNUNET_PQ_result_spec_uint32(const char *name, uint32_t *u32)
uint32_t expected.
struct GNUNET_PQ_ResultSpec GNUNET_PQ_result_spec_absolute_time(const char *name, struct GNUNET_TIME_Absolute *at)
Absolute time expected.
struct GNUNET_DATACACHE_PluginEnvironment * env
Our execution environment.
Closure for process_result.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint32(const uint32_t *x)
Generate query parameter for an uint32_t in host byte order.
A 512-bit hashcode.
#define GNUNET_DATASTORE_ENTRY_OVERHEAD
How many bytes of overhead will we assume per entry in any DB (for reservations)? ...
static int res
#define GNUNET_PQ_result_spec_auto_from_type(name, dst)
We expect a fixed-size result, with size determined by the type of * dst
struct GNUNET_HashCode key
The key used in the DHT.
static unsigned int size
Size of the "table".
Definition: peer.c:66
void * proc_cls
Closure for proc.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
#define GNUNET_log(kind,...)
void * cls
Closure to use for callbacks.
Time for absolute times used by GNUnet, in microseconds.
static unsigned int anonymity
#define GNUNET_log_from(kind, comp,...)
uint32_t data
The data value.
int GNUNET_PQ_extract_result(PGresult *result, struct GNUNET_PQ_ResultSpec *rs, int row)
Extract results from a query result according to the given specification.
Definition: pq.c:144
void GNUNET_PQ_cleanup_result(struct GNUNET_PQ_ResultSpec *rs)
Free all memory that was allocated in rs during GNUNET_PQ_extract_result().
Definition: pq.c:121
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◆ postgres_plugin_get_key()

static void postgres_plugin_get_key ( void *  cls,
uint64_t  next_uid,
bool  random,
const struct GNUNET_HashCode key,
enum GNUNET_BLOCK_Type  type,
PluginDatumProcessor  proc,
void *  proc_cls 
)
static

Get one of the results for a particular key in the datastore.

Parameters
clsclosure with the struct Plugin
next_uidreturn the result with lowest uid >= next_uid
randomif true, return a random result instead of using next_uid
keymaybe NULL (to match all entries)
typeentries of which type are relevant? Use 0 for any type.
procfunction to call on the matching value; will be called with NULL if nothing matches
proc_clsclosure for proc

Definition at line 490 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_BLOCK_TYPE_ANY, GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u64(), GNUNET_PQ_eval_prepared_multi_select(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_uint16(), GNUNET_PQ_query_param_uint32(), GNUNET_PQ_query_param_uint64(), GNUNET_TIME_UNIT_ZERO_ABS, Plugin::key, plugin, ProcessResultContext::plugin, ProcessResultContext::proc, ProcessResultContext::proc_cls, process_result(), res, and type.

Referenced by libgnunet_plugin_datastore_postgres_init().

497 {
498  struct Plugin *plugin = cls;
499  uint32_t utype = type;
500  uint16_t use_rvalue = random;
501  uint16_t use_key = NULL != key;
502  uint16_t use_type = GNUNET_BLOCK_TYPE_ANY != type;
503  uint64_t rvalue;
504  struct GNUNET_PQ_QueryParam params[] = {
505  GNUNET_PQ_query_param_uint64(&next_uid),
507  GNUNET_PQ_query_param_uint16(&use_rvalue),
511  GNUNET_PQ_query_param_uint16(&use_type),
513  };
514  struct ProcessResultContext prc;
516 
517  if (random)
518  {
520  UINT64_MAX);
521  next_uid = 0;
522  }
523  else
524  {
525  rvalue = 0;
526  }
527  prc.plugin = plugin;
528  prc.proc = proc;
529  prc.proc_cls = proc_cls;
530 
532  "get",
533  params,
535  &prc);
536  if (0 > res)
537  proc(proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
539 }
PluginDatumProcessor proc
Function to call on each result.
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.
Any type of block, used as a wildcard when searching.
uint64_t GNUNET_CRYPTO_random_u64(enum GNUNET_CRYPTO_Quality mode, uint64_t max)
Random on unsigned 64-bit values.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint16(const uint16_t *x)
Generate query parameter for an uint16_t in host byte order.
static void process_result(void *cls, PGresult *res, unsigned int num_results)
Function invoked to process the result and call the processor of cls.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
Closure for process_result.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint32(const uint32_t *x)
Generate query parameter for an uint32_t in host byte order.
static int res
struct GNUNET_HashCode key
The key used in the DHT.
void * proc_cls
Closure for proc.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint64(const uint64_t *x)
Generate query parameter for an uint16_t in host byte order.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_multi_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, GNUNET_PQ_PostgresResultHandler rh, void *rh_cls)
Execute a named prepared statement that is a SELECT statement which may return multiple results in co...
Definition: pq_eval.c:194
No good quality of the operation is needed (i.e., random numbers can be pseudo-random).
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◆ postgres_plugin_get_zero_anonymity()

static void postgres_plugin_get_zero_anonymity ( void *  cls,
uint64_t  next_uid,
enum GNUNET_BLOCK_Type  type,
PluginDatumProcessor  proc,
void *  proc_cls 
)
static

Select a subset of the items in the datastore and call the given iterator for each of them.

Parameters
clsour struct Plugin *
next_uidreturn the result with lowest uid >= next_uid
typeentries of which type should be considered? Must not be zero (ANY).
procfunction to call on the matching value; will be called with NULL if no value matches
proc_clsclosure for proc

Definition at line 555 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_PQ_eval_prepared_multi_select(), GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_uint32(), GNUNET_PQ_query_param_uint64(), GNUNET_TIME_UNIT_ZERO_ABS, plugin, ProcessResultContext::plugin, ProcessResultContext::proc, ProcessResultContext::proc_cls, process_result(), res, and type.

Referenced by libgnunet_plugin_datastore_postgres_init().

560 {
561  struct Plugin *plugin = cls;
562  uint32_t utype = type;
563  struct GNUNET_PQ_QueryParam params[] = {
565  GNUNET_PQ_query_param_uint64(&next_uid),
567  };
568  struct ProcessResultContext prc;
570 
571  prc.plugin = plugin;
572  prc.proc = proc;
573  prc.proc_cls = proc_cls;
575  "select_non_anonymous",
576  params,
578  &prc);
579  if (0 > res)
580  proc(proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
582 }
PluginDatumProcessor proc
Function to call on each result.
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.
static void process_result(void *cls, PGresult *res, unsigned int num_results)
Function invoked to process the result and call the processor of cls.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
Closure for process_result.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint32(const uint32_t *x)
Generate query parameter for an uint32_t in host byte order.
static int res
void * proc_cls
Closure for proc.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint64(const uint64_t *x)
Generate query parameter for an uint16_t in host byte order.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_multi_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, GNUNET_PQ_PostgresResultHandler rh, void *rh_cls)
Execute a named prepared statement that is a SELECT statement which may return multiple results in co...
Definition: pq_eval.c:194
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◆ repl_proc()

static int repl_proc ( 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

Wrapper for the iterator for 'sqlite_plugin_replication_get'.

Decrements the replication counter and calls the original iterator.

Parameters
clsclosure with the struct ReplCtx *
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 628 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_uint32(), GNUNET_SYSERR, plugin, ReplCtx::plugin, ReplCtx::proc, ReplCtx::proc_cls, and ret.

Referenced by postgres_plugin_get_replication().

638 {
639  struct ReplCtx *rc = cls;
640  struct Plugin *plugin = rc->plugin;
641  int ret;
642  uint32_t oid = (uint32_t)uid;
643  struct GNUNET_PQ_QueryParam params[] = {
646  };
647  enum GNUNET_DB_QueryStatus qret;
648 
649  ret = rc->proc(rc->proc_cls,
650  key,
651  size,
652  data,
653  type,
654  priority,
655  anonymity,
656  replication,
657  expiration,
658  uid);
659  if (NULL == key)
660  return ret;
662  "decrepl",
663  params);
664  if (0 > qret)
665  return GNUNET_SYSERR;
666  return ret;
667 }
void * proc_cls
Closure for proc.
struct Plugin * plugin
Plugin handle.
static unsigned int replication
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:151
static int ret
Final status code.
Definition: gnunet-arm.c:89
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_uint32(const uint32_t *x)
Generate query parameter for an uint32_t in host byte order.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
Context for repl_proc() function.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
PluginDatumProcessor proc
Function to call for the result (or the NULL).
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
static unsigned int anonymity
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
uint32_t data
The data value.
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◆ postgres_plugin_get_replication()

static void postgres_plugin_get_replication ( void *  cls,
PluginDatumProcessor  proc,
void *  proc_cls 
)
static

Get a random item for replication.

Returns a single, not expired, random item from those with the highest replication counters. The item's replication counter is decremented by one IF it was positive before. Call proc with all values ZERO or NULL if the datastore is empty.

Parameters
clsclosure with the struct Plugin
procfunction to call the value (once only).
proc_clsclosure for proc

Definition at line 682 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_PQ_eval_prepared_multi_select(), GNUNET_PQ_query_param_end, GNUNET_TIME_UNIT_ZERO_ABS, plugin, ProcessResultContext::plugin, ReplCtx::plugin, ProcessResultContext::proc, ReplCtx::proc, ProcessResultContext::proc_cls, ReplCtx::proc_cls, process_result(), repl_proc(), and res.

Referenced by libgnunet_plugin_datastore_postgres_init().

685 {
686  struct Plugin *plugin = cls;
687  struct GNUNET_PQ_QueryParam params[] = {
689  };
690  struct ReplCtx rc;
691  struct ProcessResultContext prc;
693 
694  rc.plugin = plugin;
695  rc.proc = proc;
696  rc.proc_cls = proc_cls;
697  prc.plugin = plugin;
698  prc.proc = &repl_proc;
699  prc.proc_cls = &rc;
701  "select_replication_order",
702  params,
704  &prc);
705  if (0 > res)
706  proc(proc_cls, NULL, 0, NULL, 0, 0, 0, 0,
708 }
PluginDatumProcessor proc
Function to call on each result.
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.
static int repl_proc(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)
Wrapper for the iterator for &#39;sqlite_plugin_replication_get&#39;.
static void process_result(void *cls, PGresult *res, unsigned int num_results)
Function invoked to process the result and call the processor of cls.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
Closure for process_result.
static int res
Context for repl_proc() function.
void * proc_cls
Closure for proc.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_multi_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, GNUNET_PQ_PostgresResultHandler rh, void *rh_cls)
Execute a named prepared statement that is a SELECT statement which may return multiple results in co...
Definition: pq_eval.c:194
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◆ postgres_plugin_get_expiration()

static void postgres_plugin_get_expiration ( void *  cls,
PluginDatumProcessor  proc,
void *  proc_cls 
)
static

Get a random item for expiration.

Call proc with all values ZERO or NULL if the datastore is empty.

Parameters
clsclosure with the struct Plugin
procfunction to call the value (once only).
proc_clsclosure for proc

Definition at line 720 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_PQ_eval_prepared_multi_select(), GNUNET_PQ_query_param_absolute_time(), GNUNET_PQ_query_param_end, GNUNET_TIME_absolute_get(), plugin, ProcessResultContext::plugin, ProcessResultContext::proc, ProcessResultContext::proc_cls, and process_result().

Referenced by libgnunet_plugin_datastore_postgres_init().

723 {
724  struct Plugin *plugin = cls;
725  struct GNUNET_TIME_Absolute now;
726  struct GNUNET_PQ_QueryParam params[] = {
729  };
730  struct ProcessResultContext prc;
731 
732  now = GNUNET_TIME_absolute_get();
733  prc.plugin = plugin;
734  prc.proc = proc;
735  prc.proc_cls = proc_cls;
737  "select_expiration_order",
738  params,
740  &prc);
741 }
PluginDatumProcessor proc
Function to call on each result.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_absolute_time(const struct GNUNET_TIME_Absolute *x)
Generate query parameter for an absolute time value.
static void process_result(void *cls, PGresult *res, unsigned int num_results)
Function invoked to process the result and call the processor of cls.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
Closure for process_result.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
void * proc_cls
Closure for proc.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
Time for absolute times used by GNUnet, in microseconds.
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_multi_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, GNUNET_PQ_PostgresResultHandler rh, void *rh_cls)
Execute a named prepared statement that is a SELECT statement which may return multiple results in co...
Definition: pq_eval.c:194
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◆ process_keys()

static void process_keys ( void *  cls,
PGresult *  result,
unsigned int  num_results 
)
static

Function to be called with the results of a SELECT statement that has returned num_results results.

Parameters
clsclosure with a struct ProcessKeysContext
resultthe postgres result
num_resultthe number of results in result

Definition at line 769 of file plugin_datastore_postgres.c.

References GNUNET_break, GNUNET_OK, GNUNET_PQ_cleanup_result(), GNUNET_PQ_extract_result(), GNUNET_PQ_result_spec_auto_from_type, GNUNET_PQ_result_spec_end, ProcessKeysContext::proc, and ProcessKeysContext::proc_cls.

Referenced by postgres_plugin_get_keys().

772 {
773  struct ProcessKeysContext *pkc = cls;
774 
775  for (unsigned i = 0; i < num_results; i++)
776  {
777  struct GNUNET_HashCode key;
778  struct GNUNET_PQ_ResultSpec rs[] = {
780  &key),
782  };
783 
784  if (GNUNET_OK !=
786  rs,
787  i))
788  {
789  GNUNET_break(0);
790  continue;
791  }
792  pkc->proc(pkc->proc_cls,
793  &key,
794  1);
796  }
797 }
Description of a DB result cell.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
PluginKeyProcessor proc
Function to call for each key.
#define GNUNET_PQ_result_spec_end
End of result parameter specification.
void * proc_cls
Closure for proc.
static int result
Global testing status.
A 512-bit hashcode.
#define GNUNET_PQ_result_spec_auto_from_type(name, dst)
We expect a fixed-size result, with size determined by the type of * dst
struct GNUNET_HashCode key
The key used in the DHT.
Closure for process_keys.
int GNUNET_PQ_extract_result(PGresult *result, struct GNUNET_PQ_ResultSpec *rs, int row)
Extract results from a query result according to the given specification.
Definition: pq.c:144
void GNUNET_PQ_cleanup_result(struct GNUNET_PQ_ResultSpec *rs)
Free all memory that was allocated in rs during GNUNET_PQ_extract_result().
Definition: pq.c:121
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◆ postgres_plugin_get_keys()

static void postgres_plugin_get_keys ( void *  cls,
PluginKeyProcessor  proc,
void *  proc_cls 
)
static

Get all of the keys in the datastore.

Parameters
clsclosure with the struct Plugin *
procfunction to call on each key
proc_clsclosure for proc

Definition at line 808 of file plugin_datastore_postgres.c.

References Plugin::dbh, GNUNET_PQ_eval_prepared_multi_select(), GNUNET_PQ_query_param_end, plugin, ProcessKeysContext::proc, ProcessKeysContext::proc_cls, and process_keys().

Referenced by libgnunet_plugin_datastore_postgres_init().

811 {
812  struct Plugin *plugin = cls;
813  struct GNUNET_PQ_QueryParam params[] = {
815  };
816  struct ProcessKeysContext pkc;
817 
818  pkc.proc = proc;
819  pkc.proc_cls = proc_cls;
821  "get_keys",
822  params,
823  &process_keys,
824  &pkc);
825  proc(proc_cls,
826  NULL,
827  0);
828 }
PluginKeyProcessor proc
Function to call for each key.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
void * proc_cls
Closure for proc.
Closure for process_keys.
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
static void process_keys(void *cls, PGresult *result, unsigned int num_results)
Function to be called with the results of a SELECT statement that has returned num_results results...
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_multi_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, GNUNET_PQ_PostgresResultHandler rh, void *rh_cls)
Execute a named prepared statement that is a SELECT statement which may return multiple results in co...
Definition: pq_eval.c:194
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◆ postgres_plugin_drop()

static void postgres_plugin_drop ( void *  cls)
static

Drop database.

Parameters
clsclosure with the struct Plugin *

Definition at line 837 of file plugin_datastore_postgres.c.

References _, Plugin::dbh, GNUNET_ERROR_TYPE_WARNING, GNUNET_log_from, GNUNET_OK, GNUNET_PQ_exec_statements(), GNUNET_PQ_EXECUTE_STATEMENT_END, GNUNET_PQ_make_execute(), and plugin.

Referenced by libgnunet_plugin_datastore_postgres_init().

838 {
839  struct Plugin *plugin = cls;
840  struct GNUNET_PQ_ExecuteStatement es[] = {
841  GNUNET_PQ_make_execute("DROP TABLE gn090"),
843  };
844 
845  if (GNUNET_OK !=
847  es))
849  "postgres",
850  _("Failed to drop table from database.\n"));
851 }
struct GNUNET_PQ_ExecuteStatement GNUNET_PQ_make_execute(const char *sql)
Create a struct GNUNET_PQ_ExecuteStatement where errors are fatal.
Definition: pq_exec.c:37
Information needed to run a list of SQL statements using GNUNET_PQ_exec_statements().
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
int GNUNET_PQ_exec_statements(PGconn *connection, const struct GNUNET_PQ_ExecuteStatement *es)
Request execution of an array of statements es from Postgres.
Definition: pq_exec.c:77
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
#define GNUNET_PQ_EXECUTE_STATEMENT_END
Terminator for executable statement list.
#define GNUNET_log_from(kind, comp,...)
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◆ postgres_plugin_remove_key()

static void postgres_plugin_remove_key ( void *  cls,
const struct GNUNET_HashCode key,
uint32_t  size,
const void *  data,
PluginRemoveCont  cont,
void *  cont_cls 
)
static

Remove a particular key in the datastore.

Parameters
clsclosure
keykey for the content
sizenumber of bytes in data
datacontent stored
contcontinuation called with success or failure status
cont_clscontinuation closure for cont

Definition at line 865 of file plugin_datastore_postgres.c.

References _, GNUNET_DATACACHE_PluginEnvironment::cls, Plugin::dbh, Plugin::env, GNUNET_DATASTORE_ENTRY_OVERHEAD, GNUNET_DB_STATUS_SUCCESS_NO_RESULTS, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log_from, GNUNET_NO, GNUNET_OK, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_fixed_size(), GNUNET_SYSERR, plugin, and ret.

Referenced by libgnunet_plugin_datastore_postgres_init().

871 {
872  struct Plugin *plugin = cls;
874  struct GNUNET_PQ_QueryParam params[] = {
878  };
879 
881  "remove",
882  params);
883  if (0 > ret)
884  {
885  cont(cont_cls,
886  key,
887  size,
889  _("Postgress exec failure"));
890  return;
891  }
893  {
894  cont(cont_cls,
895  key,
896  size,
897  GNUNET_NO,
898  NULL);
899  return;
900  }
901  plugin->env->duc(plugin->env->cls,
904  "datastore-postgres",
905  "Deleted %u bytes from database\n",
906  (unsigned int)size);
907  cont(cont_cls,
908  key,
909  size,
910  GNUNET_OK,
911  NULL);
912 }
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(PGconn *connection, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:151
static int ret
Final status code.
Definition: gnunet-arm.c:89
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:94
struct GNUNET_DATACACHE_PluginEnvironment * env
Our execution environment.
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
#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:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:63
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_fixed_size(const void *ptr, size_t ptr_size)
Generate query parameter for a buffer ptr of ptr_size bytes.
void * cls
Closure to use for callbacks.
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
#define GNUNET_log_from(kind, comp,...)
The transaction succeeded, but yielded zero results.
Definition: gnunet_db_lib.h:52
uint32_t data
The data value.
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◆ libgnunet_plugin_datastore_postgres_init()

void* libgnunet_plugin_datastore_postgres_init ( void *  cls)

Entry point for the plugin.

Parameters
clsthe struct GNUNET_DATASTORE_PluginEnvironment*
Returns
our struct Plugin *

Definition at line 922 of file plugin_datastore_postgres.c.

References _, Plugin::api, GNUNET_DATASTORE_PluginEnvironment::cls, GNUNET_DATASTORE_PluginFunctions::cls, GNUNET_DATASTORE_PluginFunctions::drop, Plugin::env, GNUNET_DATASTORE_PluginFunctions::estimate_size, GNUNET_DATASTORE_PluginFunctions::get_expiration, GNUNET_DATASTORE_PluginFunctions::get_key, GNUNET_DATASTORE_PluginFunctions::get_keys, GNUNET_DATASTORE_PluginFunctions::get_replication, GNUNET_DATASTORE_PluginFunctions::get_zero_anonymity, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log_from, GNUNET_new, GNUNET_OK, init_connection(), plugin, postgres_plugin_drop(), postgres_plugin_estimate_size(), postgres_plugin_get_expiration(), postgres_plugin_get_key(), postgres_plugin_get_keys(), postgres_plugin_get_replication(), postgres_plugin_get_zero_anonymity(), postgres_plugin_put(), postgres_plugin_remove_key(), GNUNET_DATASTORE_PluginFunctions::put, and GNUNET_DATASTORE_PluginFunctions::remove_key.

923 {
926  struct Plugin *plugin;
927 
928  plugin = GNUNET_new(struct Plugin);
929  plugin->env = env;
930  if (GNUNET_OK != init_connection(plugin))
931  {
932  GNUNET_free(plugin);
933  return NULL;
934  }
936  api->cls = plugin;
938  api->put = &postgres_plugin_put;
944  api->drop = &postgres_plugin_drop;
947  "datastore-postgres",
948  _("Postgres database running\n"));
949  return api;
950 }
PluginGetKeys get_keys
Iterate over all keys in the database.
PluginPut put
Function to store an item in the datastore.
PluginGetType get_zero_anonymity
Get datum (of the specified type) with anonymity level zero.
static void postgres_plugin_get_zero_anonymity(void *cls, uint64_t next_uid, enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc, void *proc_cls)
Select a subset of the items in the datastore and call the given iterator for each of them...
PluginRemoveKey remove_key
Function to remove an item from the database.
PluginEstimateSize estimate_size
Calculate the current on-disk size of the SQ store.
static void postgres_plugin_put(void *cls, const struct GNUNET_HashCode *key, bool absent, 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, PluginPutCont cont, void *cont_cls)
Store an item in the datastore.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static void postgres_plugin_get_expiration(void *cls, PluginDatumProcessor proc, void *proc_cls)
Get a random item for expiration.
struct GNUNET_BLOCK_PluginFunctions * api
Plugin API.
Definition: block.c:46
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
PluginGetRandom get_replication
Function to get a random item with high replication score from the database, lowering the item&#39;s repl...
PluginDrop drop
Delete the database.
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
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_DATACACHE_PluginEnvironment * env
Our execution environment.
static void postgres_plugin_remove_key(void *cls, const struct GNUNET_HashCode *key, uint32_t size, const void *data, PluginRemoveCont cont, void *cont_cls)
Remove a particular key in the datastore.
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
The datastore service will pass a pointer to a struct of this type as the first and only argument to ...
static void postgres_plugin_drop(void *cls)
Drop database.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static void postgres_plugin_get_replication(void *cls, PluginDatumProcessor proc, void *proc_cls)
Get a random item for replication.
void * cls
Closure to use for all of the following callbacks (except "next_request").
static void postgres_plugin_get_keys(void *cls, PluginKeyProcessor proc, void *proc_cls)
Get all of the keys in the datastore.
Handle for a plugin.
Definition: block.c:37
static int init_connection(struct Plugin *plugin)
Get a database handle.
#define GNUNET_log_from(kind, comp,...)
PluginGetKey get_key
Get a particular datum matching a given hash from the datastore.
static void postgres_plugin_estimate_size(void *cls, unsigned long long *estimate)
Get an estimate of how much space the database is currently using.
static void postgres_plugin_get_key(void *cls, uint64_t next_uid, bool random, const struct GNUNET_HashCode *key, enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc, void *proc_cls)
Get one of the results for a particular key in the datastore.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ libgnunet_plugin_datastore_postgres_done()

void* libgnunet_plugin_datastore_postgres_done ( void *  cls)

Exit point from the plugin.

Parameters
clsour struct Plugin *
Returns
always NULL

Definition at line 960 of file plugin_datastore_postgres.c.

References Plugin::api, GNUNET_DATASTORE_PluginFunctions::cls, Plugin::dbh, GNUNET_free, and plugin.

961 {
963  struct Plugin *plugin = api->cls;
964 
965  PQfinish(plugin->dbh);
966  GNUNET_free(plugin);
967  GNUNET_free(api);
968  return NULL;
969 }
static struct GNUNET_ATS_SolverFunctions * plugin
Our solver.
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
void * cls
Closure to use for all of the following callbacks (except "next_request").
Handle for a plugin.
Definition: block.c:37
PGconn * dbh
Native Postgres database handle.
#define GNUNET_free(ptr)
Wrapper around free.