openldap/servers/slapd/back-sql/sql-wrap.c

481 lines
13 KiB
C

/*
* Copyright 1999, Dmitry Kovalev <mit@openldap.org>, All rights reserved.
*
* Redistribution and use in source and binary forms are permitted only
* as authorized by the OpenLDAP Public License. A copy of this
* license is available at http://www.OpenLDAP.org/license.html or
* in file LICENSE in the top-level directory of the distribution.
*/
#include "portable.h"
#ifdef SLAPD_SQL
#include <stdio.h>
#include "ac/string.h"
#include <sys/types.h>
#include "slap.h"
#include "ldap_pvt.h"
#include "back-sql.h"
#include "sql-types.h"
#include "sql-wrap.h"
#include "schema-map.h"
#define MAX_ATTR_LEN 16384
typedef struct backsql_conn {
int ldap_cid;
SQLHDBC dbh;
} backsql_db_conn;
void
backsql_PrintErrors( SQLHENV henv, SQLHDBC hdbc, SQLHSTMT sth, int rc )
{
SQLCHAR msg[SQL_MAX_MESSAGE_LENGTH]; /* msg. buffer */
SQLCHAR state[SQL_SQLSTATE_SIZE]; /* statement buf. */
SDWORD iSqlCode; /* return code */
SWORD len = SQL_MAX_MESSAGE_LENGTH - 1; /* return length */
Debug( LDAP_DEBUG_TRACE, "Return code: %d\n", rc, 0, 0 );
rc = SQLError( henv, hdbc, sth, state, &iSqlCode, msg,
SQL_MAX_MESSAGE_LENGTH - 1, &len );
for ( ; BACKSQL_SUCCESS( rc ); ) {
Debug( LDAP_DEBUG_TRACE, "Native error code: %d\n",
(int)iSqlCode, 0, 0 );
Debug( LDAP_DEBUG_TRACE, "SQL engine state: %s\n",
state, 0, 0 );
Debug( LDAP_DEBUG_TRACE, "Message: %s\n", msg, 0, 0 );
rc = SQLError( henv, hdbc, sth, state, &iSqlCode, msg,
SQL_MAX_MESSAGE_LENGTH - 1, &len );
}
}
RETCODE
backsql_Prepare( SQLHDBC dbh, SQLHSTMT *sth, char *query, int timeout )
{
RETCODE rc;
char drv_name[ 30 ];
SWORD len;
rc = SQLAllocStmt( dbh, sth );
if ( rc != SQL_SUCCESS ) {
return rc;
}
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "==>_SQLPrepare()\n", 0, 0, 0 );
#endif /* BACKSQL_TRACE */
SQLGetInfo( dbh, SQL_DRIVER_NAME, drv_name, sizeof( drv_name ), &len );
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "_SQLPrepare(): driver name='%s'\n",
drv_name, 0, 0 );
#endif /* BACKSQL_TRACE */
ldap_pvt_str2upper( drv_name );
if ( !strncmp( drv_name, "SQLSRV32.DLL", sizeof( drv_name ) ) ) {
/*
* stupid default result set in MS SQL Server
* does not support multiple active statements
* on the same connection -- so we are trying
* to make it not to use default result set...
*/
Debug( LDAP_DEBUG_TRACE, "_SQLprepare(): "
"enabling MS SQL Server default result "
"set workaround\n", 0, 0, 0 );
rc = SQLSetStmtOption( *sth, SQL_CONCURRENCY,
SQL_CONCUR_ROWVER );
if ( rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO ) {
Debug( LDAP_DEBUG_TRACE, "_SQLPrepare(): "
"SQLSetStmtOption(SQL_CONCURRENCY,"
"SQL_CONCUR_ROWVER) failed:\n",
0, 0, 0 );
backsql_PrintErrors( SQL_NULL_HENV, dbh, *sth, rc );
}
}
if ( timeout > 0 ) {
Debug( LDAP_DEBUG_TRACE, "_SQLprepare(): "
"setting query timeout to %d sec.\n",
timeout, 0, 0 );
rc = SQLSetStmtOption( *sth, SQL_QUERY_TIMEOUT, timeout );
if ( rc != SQL_SUCCESS ) {
backsql_PrintErrors( SQL_NULL_HENV, dbh, *sth, rc );
}
}
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "<==_SQLPrepare() calling SQLPrepare()\n",
0, 0, 0 );
#endif /* BACKSQL_TRACE */
return SQLPrepare( *sth, query, SQL_NTS );
}
#if 0
/*
* Turned into macros --- see sql-wrap.h
*/
RETCODE
backsql_BindParamStr( SQLHSTMT sth, int par_ind, char *str, int maxlen )
{
RETCODE rc;
rc = SQLBindParameter( sth, (SQLUSMALLINT)par_ind, SQL_PARAM_INPUT,
SQL_C_CHAR, SQL_VARCHAR,
(SQLUINTEGER)maxlen, 0, (SQLPOINTER)str,
(SQLUINTEGER)maxlen, NULL );
return rc;
}
RETCODE
backsql_BindParamID( SQLHSTMT sth, int par_ind, unsigned long *id )
{
return SQLBindParameter( sth, (SQLUSMALLINT)par_ind,
SQL_PARAM_INPUT, SQL_C_ULONG, SQL_INTEGER,
0, 0, (SQLPOINTER)id, 0, (SQLINTEGER*)NULL );
}
#endif
RETCODE
backsql_BindRowAsStrings( SQLHSTMT sth, BACKSQL_ROW_NTS *row )
{
RETCODE rc;
SQLCHAR colname[ 64 ];
SQLSMALLINT name_len, col_type, col_scale, col_null;
UDWORD col_prec;
int i;
if ( row == NULL ) {
return SQL_ERROR;
}
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "==> backsql_BindRowAsStrings()\n", 0, 0, 0 );
#endif /* BACKSQL_TRACE */
rc = SQLNumResultCols( sth, &row->ncols );
if ( rc != SQL_SUCCESS ) {
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "_SQLBindRowAsStrings(): "
"SQLNumResultCols() failed:\n", 0, 0, 0 );
#endif /* BACKSQL_TRACE */
backsql_PrintErrors( SQL_NULL_HENV, SQL_NULL_HDBC, sth, rc );
} else {
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "backsql_BindRowAsStrings: "
"ncols=%d\n", (int)row->ncols, 0, 0 );
#endif /* BACKSQL_TRACE */
row->col_names = (BerVarray)ch_calloc( row->ncols + 1,
sizeof( struct berval ) );
row->cols = (char **)ch_calloc( row->ncols + 1,
sizeof( char * ) );
row->col_prec = (UDWORD *)ch_calloc( row->ncols,
sizeof( UDWORD ) );
row->is_null = (SQLINTEGER *)ch_calloc( row->ncols,
sizeof( SQLINTEGER ) );
for ( i = 1; i <= row->ncols; i++ ) {
rc = SQLDescribeCol( sth, (SQLSMALLINT)i, &colname[ 0 ],
(SQLUINTEGER)( sizeof( colname ) - 1 ),
&name_len, &col_type,
&col_prec, &col_scale, &col_null );
ber_str2bv( colname, 0, 1, &row->col_names[ i - 1 ] );
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "backsql_BindRowAsStrings: "
"col_name=%s, col_prec[%d]=%d\n",
colname, (int)i, (int)col_prec );
#endif /* BACKSQL_TRACE */
if ( col_type == SQL_LONGVARCHAR
|| col_type == SQL_LONGVARBINARY) {
#if 0
row->cols[ i - 1 ] = NULL;
row->col_prec[ i - 1 ] = -1;
/*
* such fields must be handled
* in some other way since they return 2G
* as their precision (at least it does so
* with MS SQL Server w/native driver)
* for now, we just set fixed precision
* for such fields - dirty hack, but...
* no time to deal with SQLGetData()
*/
#endif
col_prec = MAX_ATTR_LEN;
row->cols[ i - 1 ] = (char *)ch_calloc( col_prec + 1, sizeof( char ) );
row->col_prec[ i - 1 ] = col_prec;
rc = SQLBindCol( sth, (SQLUSMALLINT)i,
SQL_C_CHAR,
(SQLPOINTER)row->cols[ i - 1 ],
col_prec + 1,
&row->is_null[ i - 1 ] );
} else {
row->cols[ i - 1 ] = (char *)ch_calloc( col_prec + 1, sizeof( char ) );
row->col_prec[ i - 1 ] = col_prec;
rc = SQLBindCol( sth, (SQLUSMALLINT)i,
SQL_C_CHAR,
(SQLPOINTER)row->cols[ i - 1 ],
col_prec + 1,
&row->is_null[ i - 1 ] );
}
}
row->col_names[ i - 1 ].bv_val = NULL;
row->col_names[ i - 1 ].bv_len = 0;
row->cols[ i - 1 ] = NULL;
}
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "<== backsql_BindRowAsStrings()\n", 0, 0, 0 );
#endif /* BACKSQL_TRACE */
return rc;
}
RETCODE
backsql_FreeRow( BACKSQL_ROW_NTS *row )
{
if ( row->cols == NULL ) {
return SQL_ERROR;
}
ber_bvarray_free( row->col_names );
ldap_charray_free( row->cols );
free( row->col_prec );
free( row->is_null );
return SQL_SUCCESS;
}
static int
backsql_cmp_connid( backsql_db_conn *c1, backsql_db_conn *c2 )
{
if ( c1->ldap_cid > c2->ldap_cid ) {
return 1;
}
if ( c1->ldap_cid < c2->ldap_cid ) {
return -1;
}
return 0;
}
static int
backsql_close_db_conn( backsql_db_conn *conn )
{
Debug( LDAP_DEBUG_TRACE, "==>backsql_close_db_conn()\n", 0, 0, 0 );
/*
* Default transact is SQL_ROLLBACK; commit is required only
* by write operations, and it is explicitly performed after
* each atomic operation succeeds.
*/
/* TimesTen */
SQLTransact( SQL_NULL_HENV, conn->dbh, SQL_ROLLBACK );
SQLDisconnect( conn->dbh );
SQLFreeConnect( conn->dbh );
Debug( LDAP_DEBUG_TRACE, "<==backsql_close_db_conn()\n", 0, 0, 0 );
return 1;
}
int
backsql_init_db_env( backsql_info *si )
{
RETCODE rc;
Debug( LDAP_DEBUG_TRACE, "==>backsql_init_db_env()\n", 0, 0, 0 );
rc = SQLAllocEnv( &si->db_env );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "init_db_env: SQLAllocEnv failed:\n",
0, 0, 0 );
backsql_PrintErrors( SQL_NULL_HENV, SQL_NULL_HDBC,
SQL_NULL_HENV, rc );
}
Debug( LDAP_DEBUG_TRACE, "<==backsql_init_db_env()\n", 0, 0, 0 );
return SQL_SUCCESS;
}
int
backsql_free_db_env( backsql_info *si )
{
Debug( LDAP_DEBUG_TRACE, "==>backsql_free_db_env()\n", 0, 0, 0 );
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE, "free_db_env(): delete AVL tree here!!!\n",
0, 0, 0 );
#endif /* BACKSQL_TRACE */
/*
* stop, if frontend waits for all threads to shutdown
* before calling this -- then what are we going to delete??
* everything is already deleted...
*/
Debug( LDAP_DEBUG_TRACE, "<==backsql_free_db_env()\n", 0, 0, 0 );
return SQL_SUCCESS;
}
static int
backsql_open_db_conn( backsql_info *si, int ldap_cid, backsql_db_conn **pdbc )
{
/* TimesTen */
char DBMSName[ 32 ];
backsql_db_conn *dbc;
int rc;
assert( pdbc );
*pdbc = NULL;
Debug( LDAP_DEBUG_TRACE, "==>backsql_open_db_conn()\n", 0, 0, 0 );
dbc = (backsql_db_conn *)ch_calloc( 1, sizeof( backsql_db_conn ) );
dbc->ldap_cid = ldap_cid;
rc = SQLAllocConnect( si->db_env, &dbc->dbh );
if ( !BACKSQL_SUCCESS( rc ) ) {
Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
"SQLAllocConnect() failed:\n", 0, 0, 0 );
backsql_PrintErrors( si->db_env, SQL_NULL_HDBC,
SQL_NULL_HENV, rc );
return LDAP_UNAVAILABLE;
}
rc = SQLConnect( dbc->dbh, si->dbname, SQL_NTS, si->dbuser,
SQL_NTS, si->dbpasswd, SQL_NTS );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
"SQLConnect() to database '%s' as user '%s' "
"%s:\n", si->dbname, si->dbuser,
rc == SQL_SUCCESS_WITH_INFO ?
"succeeded with info" : "failed" );
backsql_PrintErrors( si->db_env, dbc->dbh, SQL_NULL_HENV, rc );
if ( rc != SQL_SUCCESS_WITH_INFO ) {
return LDAP_UNAVAILABLE;
}
}
/*
* TimesTen : Turn off autocommit. We must explicitly
* commit any transactions.
*/
SQLSetConnectOption( dbc->dbh, SQL_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF );
/*
* See if this connection is to TimesTen. If it is,
* remember that fact for later use.
*/
/* Assume until proven otherwise */
si->bsql_flags &= ~BSQLF_USE_REVERSE_DN;
DBMSName[ 0 ] = '\0';
rc = SQLGetInfo( dbc->dbh, SQL_DBMS_NAME, (PTR)&DBMSName,
sizeof( DBMSName ), NULL );
if ( rc == SQL_SUCCESS ) {
if ( strcmp( DBMSName, "TimesTen" ) == 0 ||
strcmp( DBMSName, "Front-Tier" ) == 0 ) {
Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
"TimesTen database!\n", 0, 0, 0 );
si->bsql_flags |= BSQLF_USE_REVERSE_DN;
}
} else {
Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn: "
"SQLGetInfo() failed:\n", 0, 0, 0 );
backsql_PrintErrors( si->db_env, dbc->dbh, SQL_NULL_HENV, rc );
}
/* end TimesTen */
Debug( LDAP_DEBUG_TRACE, "backsql_open_db_conn(): "
"connected, adding to tree\n", 0, 0, 0 );
ldap_pvt_thread_mutex_lock( &si->dbconn_mutex );
avl_insert( &si->db_conns, dbc, (AVL_CMP)backsql_cmp_connid, NULL );
ldap_pvt_thread_mutex_unlock( &si->dbconn_mutex );
Debug( LDAP_DEBUG_TRACE, "<==backsql_open_db_conn()\n", 0, 0, 0 );
*pdbc = dbc;
return LDAP_SUCCESS;
}
int
backsql_free_db_conn( Backend *be, Connection *ldapc )
{
backsql_info *si = (backsql_info *)be->be_private;
backsql_db_conn tmp, *conn;
Debug( LDAP_DEBUG_TRACE, "==>backsql_free_db_conn()\n", 0, 0, 0 );
tmp.ldap_cid = ldapc->c_connid;
ldap_pvt_thread_mutex_lock( &si->dbconn_mutex );
conn = (backsql_db_conn *)avl_delete( &si->db_conns, &tmp,
(AVL_CMP)backsql_cmp_connid );
ldap_pvt_thread_mutex_unlock( &si->dbconn_mutex );
/*
* we have one thread per connection, as I understand -- so we can
* get this out of critical section
*/
if ( conn != NULL ) {
Debug( LDAP_DEBUG_TRACE, "backsql_free_db_conn(): "
"closing db connection\n", 0, 0, 0 );
backsql_close_db_conn( conn );
}
Debug( LDAP_DEBUG_TRACE, "<==backsql_free_db_conn()\n", 0, 0, 0 );
return SQL_SUCCESS;
}
int
backsql_get_db_conn( Backend *be, Connection *ldapc, SQLHDBC *dbh )
{
backsql_info *si = (backsql_info *)be->be_private;
backsql_db_conn *dbc;
backsql_db_conn tmp;
int rc = LDAP_SUCCESS;
Debug( LDAP_DEBUG_TRACE, "==>backsql_get_db_conn()\n", 0, 0, 0 );
assert( dbh );
*dbh = SQL_NULL_HDBC;
tmp.ldap_cid = ldapc->c_connid;
/*
* we have one thread per connection, as I understand --
* so we do not need locking here
*/
dbc = (backsql_db_conn *)avl_find( si->db_conns, &tmp,
(AVL_CMP)backsql_cmp_connid );
if ( !dbc ) {
rc = backsql_open_db_conn( si, ldapc->c_connid, &dbc );
if ( rc != LDAP_SUCCESS) {
Debug( LDAP_DEBUG_TRACE, "backsql_get_db_conn(): "
"could not get connection handle "
"-- returning NULL\n", 0, 0, 0 );
return rc;
}
}
ldap_pvt_thread_mutex_lock( &si->schema_mutex );
if ( !BACKSQL_SCHEMA_LOADED( si ) ) {
Debug( LDAP_DEBUG_TRACE, "backsql_get_db_conn(): "
"first call -- reading schema map\n", 0, 0, 0 );
rc = backsql_load_schema_map( si, dbc->dbh );
if ( rc != LDAP_SUCCESS ) {
ldap_pvt_thread_mutex_unlock( &si->schema_mutex );
backsql_free_db_conn( be, ldapc );
return rc;
}
}
ldap_pvt_thread_mutex_unlock( &si->schema_mutex );
*dbh = dbc->dbh;
Debug( LDAP_DEBUG_TRACE, "<==backsql_get_db_conn()\n", 0, 0, 0 );
return LDAP_SUCCESS;
}
#endif /* SLAPD_SQL */