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/*
Unix SMB/CIFS implementation.
Database interface wrapper around tdb
Copyright (C) Volker Lendecke 2005-2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DBWRAP_H__
#define __DBWRAP_H__
#include "replace.h"
#include <talloc.h>
#include <tevent.h>
#include "libcli/util/ntstatus.h"
#include "tdb.h"
struct db_record;
struct db_context;
enum dbwrap_lock_order {
DBWRAP_LOCK_ORDER_NONE = 0, /* Don't check lock orders for this db. */
/*
* We only allow orders 1, 2, 3:
* These are the orders that CTDB currently supports.
*/
DBWRAP_LOCK_ORDER_1 = 1,
DBWRAP_LOCK_ORDER_2 = 2,
DBWRAP_LOCK_ORDER_3 = 3
};
#define DBWRAP_FLAG_NONE 0x0000000000000000ULL
#define DBWRAP_FLAG_OPTIMIZE_READONLY_ACCESS 0x0000000000000001ULL
enum dbwrap_req_state {
/**
* We are creating the request
*/
DBWRAP_REQ_INIT,
/**
* The request is queued and waiting to be dispatched
*/
DBWRAP_REQ_QUEUED,
/**
* We are waiting to receive the reply
*/
DBWRAP_REQ_DISPATCHED,
/**
* The request is finished
*/
DBWRAP_REQ_DONE,
/**
* The request errored out
*/
DBWRAP_REQ_ERROR
};
/* The following definitions come from lib/dbwrap.c */
TDB_DATA dbwrap_record_get_key(const struct db_record *rec);
TDB_DATA dbwrap_record_get_value(const struct db_record *rec);
NTSTATUS dbwrap_record_store(struct db_record *rec, TDB_DATA data, int flags);
NTSTATUS dbwrap_record_storev(struct db_record *rec,
const TDB_DATA *dbufs, int num_dbufs, int flags);
NTSTATUS dbwrap_record_delete(struct db_record *rec);
struct db_record *dbwrap_fetch_locked(struct db_context *db,
TALLOC_CTX *mem_ctx,
TDB_DATA key);
struct db_record *dbwrap_try_fetch_locked(struct db_context *db,
TALLOC_CTX *mem_ctx,
TDB_DATA key);
struct db_context *dbwrap_record_get_db(struct db_record *rec);
NTSTATUS dbwrap_do_locked(struct db_context *db, TDB_DATA key,
void (*fn)(struct db_record *rec,
void *private_data),
void *private_data);
NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
TDB_DATA data, int flags);
NTSTATUS dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key, TDB_DATA *value);
bool dbwrap_exists(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_traverse(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data,
int *count);
NTSTATUS dbwrap_traverse_read(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data,
int *count);
NTSTATUS dbwrap_parse_record(struct db_context *db, TDB_DATA key,
void (*parser)(TDB_DATA key, TDB_DATA data,
void *private_data),
void *private_data);
/**
* Async implementation of dbwrap_parse_record
*
* @param[in] mem_ctx talloc memory context to use.
*
* @param[in] ev tevent context to use
*
* @param[in] db Database to query
*
* @param[in] key Record key, the function makes a copy of this
*
* @param[in] parser Parser callback function
*
* @param[in] private_data Private data for the callback function
*
* @param[out] req_state Pointer to a enum dbwrap_req_state variable
*
* @note req_state is updated in the send function. To determine the final
* result of the request the caller should therefor not rely on req_state. The
* primary use case is to give the caller an indication whether the request is
* already sent to ctdb (DBWRAP_REQ_DISPATCHED) or if it's still stuck in the
* sendqueue (DBWRAP_REQ_QUEUED).
**/
struct tevent_req *dbwrap_parse_record_send(
TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct db_context *db,
TDB_DATA key,
void (*parser)(TDB_DATA key, TDB_DATA data, void *private_data),
void *private_data,
enum dbwrap_req_state *req_state);
NTSTATUS dbwrap_parse_record_recv(struct tevent_req *req);
int dbwrap_wipe(struct db_context *db);
int dbwrap_check(struct db_context *db);
int dbwrap_get_seqnum(struct db_context *db);
/* Returns 0 if unknown. */
int dbwrap_transaction_start(struct db_context *db);
NTSTATUS dbwrap_transaction_start_nonblock(struct db_context *db);
int dbwrap_transaction_commit(struct db_context *db);
int dbwrap_transaction_cancel(struct db_context *db);
size_t dbwrap_db_id(struct db_context *db, uint8_t *id, size_t idlen);
bool dbwrap_is_persistent(struct db_context *db);
const char *dbwrap_name(struct db_context *db);
/* The following definitions come from lib/dbwrap_util.c */
NTSTATUS dbwrap_purge(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_purge_bystring(struct db_context *db, const char *key);
NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key);
NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
TDB_DATA data, int flags);
NTSTATUS dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
const char *key, TDB_DATA *value);
NTSTATUS dbwrap_fetch_int32(struct db_context *db, TDB_DATA key,
int32_t *result);
NTSTATUS dbwrap_fetch_int32_bystring(struct db_context *db, const char *keystr,
int32_t *result);
NTSTATUS dbwrap_store_int32_bystring(struct db_context *db, const char *keystr,
int32_t v);
NTSTATUS dbwrap_fetch_uint32_bystring(struct db_context *db,
const char *keystr, uint32_t *val);
NTSTATUS dbwrap_store_uint32_bystring(struct db_context *db,
const char *keystr, uint32_t v);
NTSTATUS dbwrap_change_uint32_atomic_bystring(struct db_context *db,
const char *keystr,
uint32_t *oldval,
uint32_t change_val);
NTSTATUS dbwrap_trans_change_uint32_atomic_bystring(struct db_context *db,
const char *keystr,
uint32_t *oldval,
uint32_t change_val);
NTSTATUS dbwrap_change_int32_atomic(struct db_context *db,
TDB_DATA key,
int32_t *oldval,
int32_t change_val);
NTSTATUS dbwrap_change_int32_atomic_bystring(struct db_context *db,
const char *keystr,
int32_t *oldval,
int32_t change_val);
NTSTATUS dbwrap_trans_change_int32_atomic_bystring(struct db_context *db,
const char *keystr,
int32_t *oldval,
int32_t change_val);
NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
int flag);
NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_trans_store_int32_bystring(struct db_context *db,
const char *keystr,
int32_t v);
NTSTATUS dbwrap_trans_store_uint32_bystring(struct db_context *db,
const char *keystr,
uint32_t v);
NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
TDB_DATA data, int flags);
NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key);
NTSTATUS dbwrap_trans_do(struct db_context *db,
NTSTATUS (*action)(struct db_context *, void *),
void *private_data);
NTSTATUS dbwrap_trans_traverse(struct db_context *db,
int (*f)(struct db_record*, void*),
void *private_data);
NTSTATUS dbwrap_delete_bystring_upper(struct db_context *db, const char *key);
NTSTATUS dbwrap_store_bystring_upper(struct db_context *db, const char *key,
TDB_DATA data, int flags);
NTSTATUS dbwrap_fetch_bystring_upper(struct db_context *db, TALLOC_CTX *mem_ctx,
const char *key, TDB_DATA *value);
size_t dbwrap_marshall(struct db_context *db, uint8_t *buf, size_t bufsize);
NTSTATUS dbwrap_parse_marshall_buf(const uint8_t *buf, size_t buflen,
bool (*fn)(TDB_DATA key, TDB_DATA value,
void *private_data),
void *private_data);
NTSTATUS dbwrap_unmarshall(struct db_context *db, const uint8_t *buf,
size_t buflen);
TDB_DATA dbwrap_merge_dbufs(TALLOC_CTX *mem_ctx,
const TDB_DATA *dbufs, int num_dbufs);
/**
* This opens a tdb file
*/
struct db_context *dbwrap_local_open(TALLOC_CTX *mem_ctx,
const char *name,
int hash_size, int tdb_flags,
int open_flags, mode_t mode,
enum dbwrap_lock_order lock_order,
uint64_t dbwrap_flags);
#endif /* __DBWRAP_H__ */
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