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/*
Unix SMB/CIFS implementation.
Utility functions for the dbwrap API
Copyright (C) Volker Lendecke 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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
{
TDB_DATA dbuf;
int32 ret;
if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
return -1;
}
if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
TALLOC_FREE(dbuf.dptr);
return -1;
}
ret = IVAL(dbuf.dptr, 0);
TALLOC_FREE(dbuf.dptr);
return ret;
}
int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
{
struct db_record *rec;
int32 v_store;
NTSTATUS status;
rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
if (rec == NULL) {
return -1;
}
SIVAL(&v_store, 0, v);
status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
sizeof(v_store)),
TDB_REPLACE);
TALLOC_FREE(rec);
return NT_STATUS_IS_OK(status) ? 0 : -1;
}
bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
uint32_t *val)
{
TDB_DATA dbuf;
if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
return false;
}
if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
TALLOC_FREE(dbuf.dptr);
return false;
}
*val = IVAL(dbuf.dptr, 0);
TALLOC_FREE(dbuf.dptr);
return true;
}
int dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
{
struct db_record *rec;
uint32 v_store;
NTSTATUS status;
rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
if (rec == NULL) {
return -1;
}
SIVAL(&v_store, 0, v);
status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
sizeof(v_store)),
TDB_REPLACE);
TALLOC_FREE(rec);
return NT_STATUS_IS_OK(status) ? 0 : -1;
}
/**
* Atomic unsigned integer change (addition):
*
* if value does not exist yet in the db, use *oldval as initial old value.
* return old value in *oldval.
* store *oldval + change_val to db.
*/
uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
uint32_t *oldval, uint32_t change_val)
{
struct db_record *rec;
uint32 val = -1;
TDB_DATA data;
if (!(rec = db->fetch_locked(db, NULL,
string_term_tdb_data(keystr)))) {
return -1;
}
if (rec->value.dptr == NULL) {
val = *oldval;
} else if (rec->value.dsize == sizeof(val)) {
val = IVAL(rec->value.dptr, 0);
*oldval = val;
} else {
return -1;
}
val += change_val;
data.dsize = sizeof(val);
data.dptr = (uint8 *)&val;
rec->store(rec, data, TDB_REPLACE);
TALLOC_FREE(rec);
return 0;
}
/**
* Atomic integer change (addition):
*
* if value does not exist yet in the db, use *oldval as initial old value.
* return old value in *oldval.
* store *oldval + change_val to db.
*/
int32 dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
int32 *oldval, int32 change_val)
{
struct db_record *rec;
int32 val = -1;
TDB_DATA data;
if (!(rec = db->fetch_locked(db, NULL,
string_term_tdb_data(keystr)))) {
return -1;
}
if (rec->value.dptr == NULL) {
val = *oldval;
} else if (rec->value.dsize == sizeof(val)) {
val = IVAL(rec->value.dptr, 0);
*oldval = val;
} else {
return -1;
}
val += change_val;
data.dsize = sizeof(val);
data.dptr = (uint8 *)&val;
rec->store(rec, data, TDB_REPLACE);
TALLOC_FREE(rec);
return 0;
}
NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
int flag)
{
int res;
struct db_record *rec = NULL;
NTSTATUS status;
res = db->transaction_start(db);
if (res != 0) {
DEBUG(5, ("transaction_start failed\n"));
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
DEBUG(5, ("fetch_locked failed\n"));
status = NT_STATUS_NO_MEMORY;
goto cancel;
}
status = rec->store(rec, dbuf, flag);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("store returned %s\n", nt_errstr(status)));
goto cancel;
}
TALLOC_FREE(rec);
res = db->transaction_commit(db);
if (res != 0) {
DEBUG(5, ("tdb_transaction_commit failed\n"));
status = NT_STATUS_INTERNAL_DB_CORRUPTION;
TALLOC_FREE(rec);
return status;
}
return NT_STATUS_OK;
cancel:
TALLOC_FREE(rec);
if (db->transaction_cancel(db) != 0) {
smb_panic("Cancelling transaction failed");
}
return status;
}
NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
{
int res;
struct db_record *rec = NULL;
NTSTATUS status;
res = db->transaction_start(db);
if (res != 0) {
DEBUG(5, ("transaction_start failed\n"));
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
DEBUG(5, ("fetch_locked failed\n"));
status = NT_STATUS_NO_MEMORY;
goto cancel;
}
status = rec->delete_rec(rec);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
goto cancel;
}
TALLOC_FREE(rec);
res = db->transaction_commit(db);
if (res != 0) {
DEBUG(5, ("tdb_transaction_commit failed\n"));
status = NT_STATUS_INTERNAL_DB_CORRUPTION;
TALLOC_FREE(rec);
return status;
}
return NT_STATUS_OK;
cancel:
TALLOC_FREE(rec);
if (db->transaction_cancel(db) != 0) {
smb_panic("Cancelling transaction failed");
}
return status;
}
NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
int32_t v)
{
int32 v_store;
SIVAL(&v_store, 0, v);
return dbwrap_trans_store(db, string_term_tdb_data(keystr),
make_tdb_data((const uint8 *)&v_store,
sizeof(v_store)),
TDB_REPLACE);
}
NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
uint32_t v)
{
uint32 v_store;
SIVAL(&v_store, 0, v);
return dbwrap_trans_store(db, string_term_tdb_data(keystr),
make_tdb_data((const uint8 *)&v_store,
sizeof(v_store)),
TDB_REPLACE);
}
NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
TDB_DATA data, int flags)
{
return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
}
NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
{
return dbwrap_trans_delete(db, string_term_tdb_data(key));
}
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