]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/result.c
Plug mutex/rwlock leaks (destroy them)
[openldap] / servers / slapd / result.c
index 9dc2dd5362086c82ba8f33938c6784d1fd3ab0b0..c984863bc4ae89a21619e99ca60dc923f37a247e 100644 (file)
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2009 The OpenLDAP Foundation.
+ * Copyright 1998-2010 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -132,46 +132,97 @@ slap_req2res( ber_tag_t tag )
        return tag;
 }
 
+#ifdef RS_ASSERT
+#elif 0 && defined LDAP_DEVEL /* FIXME: this should not crash. ITS#5340. */
+#define RS_ASSERT assert
+#else
+#define RS_ASSERT(cond) ((void) 0)
+#endif
+
+/* Set rs->sr_entry after obyeing and clearing sr_flags & REP_ENTRY_MASK. */
+void
+rs_replace_entry( Operation *op, SlapReply *rs, slap_overinst *on, Entry *e )
+{
+       slap_mask_t e_flags = rs->sr_flags & REP_ENTRY_MUSTFLUSH;
+
+       if ( e_flags && rs->sr_entry != NULL ) {
+               RS_ASSERT( e_flags != REP_ENTRY_MUSTFLUSH );
+               if ( !(e_flags & REP_ENTRY_MUSTRELEASE) ) {
+                       entry_free( rs->sr_entry );
+               } else if ( on != NULL ) {
+                       overlay_entry_release_ov( op, rs->sr_entry, 0, on );
+               } else {
+                       be_entry_release_rw( op, rs->sr_entry, 0 );
+               }
+       }
+       rs->sr_flags &= ~REP_ENTRY_MASK;
+       rs->sr_entry = e;
+}
+
+/*
+ * Ensure rs->sr_entry is modifiable, by duplicating it if necessary.
+ * Obey sr_flags.  Set REP_ENTRY_<MODIFIABLE, and MUSTBEFREED if duplicated>.
+ * Return nonzero if rs->sr_entry was replaced.
+ */
+int
+rs_ensure_entry_modifiable( Operation *op, SlapReply *rs, slap_overinst *on )
+{
+       if ( rs->sr_flags & REP_ENTRY_MODIFIABLE ) {
+               RS_ASSERT((rs->sr_flags & REP_ENTRY_MUSTFLUSH)==REP_ENTRY_MUSTBEFREED);
+               return 0;
+       }
+       rs_replace_entry( op, rs, on, entry_dup( rs->sr_entry ));
+       rs->sr_flags |= REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED;
+       return 1;
+}
+
 static long send_ldap_ber(
-       Connection *conn,
+       Operation *op,
        BerElement *ber )
 {
+       Connection *conn = op->o_conn;
        ber_len_t bytes;
        long ret = 0;
-       int closing = 0;
 
        ber_get_option( ber, LBER_OPT_BER_BYTES_TO_WRITE, &bytes );
 
        /* write only one pdu at a time - wait til it's our turn */
        ldap_pvt_thread_mutex_lock( &conn->c_write1_mutex );
-       if ( connection_state_closing( conn )) {
+       if (( op->o_abandon && !op->o_cancel ) || !connection_valid( conn ) ||
+               conn->c_writers < 0 ) {
                ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
                return 0;
        }
-       while ( conn->c_writers > 0 ) {
+
+       conn->c_writers++;
+
+       while ( conn->c_writers > 0 && conn->c_writing ) {
                ldap_pvt_thread_cond_wait( &conn->c_write1_cv, &conn->c_write1_mutex );
        }
+
        /* connection was closed under us */
        if ( conn->c_writers < 0 ) {
-               closing = 1;
                /* we're the last waiter, let the closer continue */
                if ( conn->c_writers == -1 )
                        ldap_pvt_thread_cond_signal( &conn->c_write1_cv );
-       }
-
-       conn->c_writers++;
-
-       if ( closing ) {
+               conn->c_writers++;
                ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
                return 0;
        }
 
+       /* Our turn */
+       conn->c_writing = 1;
+
        /* write the pdu */
        while( 1 ) {
                int err;
 
                /* lock the connection */ 
                if ( ldap_pvt_thread_mutex_trylock( &conn->c_mutex )) {
+                       if ( !connection_valid(conn)) {
+                               ret = 0;
+                               break;
+                       }
                        ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
                        ldap_pvt_thread_mutex_lock( &conn->c_write1_mutex );
                        if ( conn->c_writers < 0 ) {
@@ -200,6 +251,7 @@ static long send_ldap_ber(
 
                if ( err != EWOULDBLOCK && err != EAGAIN ) {
                        conn->c_writers--;
+                       conn->c_writing = 0;
                        ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
                        connection_closing( conn, "connection lost on write" );
 
@@ -210,7 +262,7 @@ static long send_ldap_ber(
                /* wait for socket to be write-ready */
                ldap_pvt_thread_mutex_lock( &conn->c_write2_mutex );
                conn->c_writewaiter = 1;
-               slapd_set_write( conn->c_sd, 1 );
+               slapd_set_write( conn->c_sd, 2 );
 
                ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
                ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
@@ -224,6 +276,7 @@ static long send_ldap_ber(
                }
        }
 
+       conn->c_writing = 0;
        if ( conn->c_writers < 0 ) {
                conn->c_writers++;
                if ( !conn->c_writers )
@@ -293,11 +346,11 @@ send_ldap_controls( Operation *o, BerElement *ber, LDAPControl **c )
 
                ber_printf( sber, "{e}", LDAP_UNWILLING_TO_PERFORM );
 
-               if( ber_flatten2( ber, &sorted.ldctl_value, 0 ) == -1 ) {
+               if( ber_flatten2( sber, &sorted.ldctl_value, 0 ) == -1 ) {
                        return -1;
                }
 
-               (void) ber_free_buf( ber );
+               (void) ber_free_buf( sber );
 
                rc = send_ldap_control( ber, &sorted );
                if( rc == -1 ) return rc;
@@ -414,7 +467,7 @@ send_ldap_response(
        int             rc = LDAP_SUCCESS;
        long    bytes;
 
-       if ( rs->sr_err == SLAPD_ABANDON || op->o_abandon ) {
+       if (( rs->sr_err == SLAPD_ABANDON || op->o_abandon ) && !op->o_cancel ) {
                rc = SLAPD_ABANDON;
                goto clean2;
        }
@@ -436,9 +489,13 @@ send_ldap_response(
                ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
        }
 
+       rc = rs->sr_err;
+       if ( rc == SLAPD_ABANDON && op->o_cancel )
+               rc = LDAP_CANCELLED;
+
        Debug( LDAP_DEBUG_TRACE,
                "send_ldap_response: msgid=%d tag=%lu err=%d\n",
-               rs->sr_msgid, rs->sr_tag, rs->sr_err );
+               rs->sr_msgid, rs->sr_tag, rc );
 
        if( rs->sr_ref ) {
                Debug( LDAP_DEBUG_ARGS, "send_ldap_response: ref=\"%s\"\n",
@@ -451,7 +508,7 @@ send_ldap_response(
                op->o_protocol == LDAP_VERSION2 )
        {
                rc = ber_printf( ber, "t{ess" /*"}"*/,
-                       rs->sr_tag, rs->sr_err,
+                       rs->sr_tag, rc,
                rs->sr_matched == NULL ? "" : rs->sr_matched,
                rs->sr_text == NULL ? "" : rs->sr_text );
        } else 
@@ -462,7 +519,7 @@ send_ldap_response(
 
        } else {
            rc = ber_printf( ber, "{it{ess" /*"}}"*/,
-               rs->sr_msgid, rs->sr_tag, rs->sr_err,
+               rs->sr_msgid, rs->sr_tag, rc,
                rs->sr_matched == NULL ? "" : rs->sr_matched,
                rs->sr_text == NULL ? "" : rs->sr_text );
        }
@@ -532,7 +589,7 @@ send_ldap_response(
        }
 
        /* send BER */
-       bytes = send_ldap_ber( op->o_conn, ber );
+       bytes = send_ldap_ber( op, ber );
 #ifdef LDAP_CONNECTIONLESS
        if (!op->o_conn || op->o_conn->c_is_udp == 0)
 #endif
@@ -603,6 +660,7 @@ send_ldap_disconnect( Operation     *op, SlapReply *rs )
        assert( LDAP_UNSOLICITED_ERROR( rs->sr_err ) );
 
        rs->sr_type = REP_EXTENDED;
+       rs->sr_rspdata = NULL;
 
        Debug( LDAP_DEBUG_TRACE,
                "send_ldap_disconnect %d:%s\n",
@@ -913,7 +971,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        if( e_flags == NULL ) {
                        Debug( LDAP_DEBUG_ANY, 
                                        "send_search_entry: conn %lu slap_sl_calloc failed\n",
-                                       op->o_connid ? op->o_connid : 0, 0, 0 );
+                                       op->o_connid, 0, 0 );
                                ber_free( ber, 1 );
        
                                send_ldap_error( op, rs, LDAP_OTHER, "out of memory" );
@@ -931,7 +989,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        if ( rc == -1 ) {
                                Debug( LDAP_DEBUG_ANY, "send_search_entry: "
                                        "conn %lu matched values filtering failed\n",
-                                       op->o_connid ? op->o_connid : 0, 0, 0 );
+                                       op->o_connid, 0, 0 );
                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                send_ldap_error( op, rs, LDAP_OTHER,
                                        "matched values filtering error" );
@@ -1098,7 +1156,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                Debug( LDAP_DEBUG_ANY,
                                        "send_search_entry: conn %lu "
                                        "matched values filtering failed\n", 
-                                       op->o_connid ? op->o_connid : 0, 0, 0);
+                                       op->o_connid, 0, 0);
                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                send_ldap_error( op, rs, LDAP_OTHER,
                                        "matched values filtering error" );
@@ -1243,7 +1301,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
        }
 
        if ( op->o_res_ber == NULL ) {
-               bytes = send_ldap_ber( op->o_conn, ber );
+               bytes = send_ldap_ber( op, ber );
                ber_free_buf( ber );
 
                if ( bytes < 0 ) {
@@ -1298,6 +1356,14 @@ error_return:;
                rs->sr_flags &= ~REP_ENTRY_MUSTBEFREED;
        }
 
+       if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
+               rs->sr_flags ^= REP_CTRLS_MUSTBEFREED; /* paranoia */
+               if ( rs->sr_ctrls ) {
+                       slap_free_ctrls( op, rs->sr_ctrls );
+                       rs->sr_ctrls = NULL;
+               }
+       }
+
        return( rc );
 }
 
@@ -1416,7 +1482,7 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
 #ifdef LDAP_CONNECTIONLESS
        if (!op->o_conn || op->o_conn->c_is_udp == 0) {
 #endif
-       bytes = send_ldap_ber( op->o_conn, ber );
+       bytes = send_ldap_ber( op, ber );
        ber_free_buf( ber );
 
        if ( bytes < 0 ) {
@@ -1452,6 +1518,14 @@ rel:
                (void)slap_cleanup_play( op, rs );
        }
 
+       if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
+               rs->sr_flags ^= REP_CTRLS_MUSTBEFREED; /* paranoia */
+               if ( rs->sr_ctrls ) {
+                       slap_free_ctrls( op, rs->sr_ctrls );
+                       rs->sr_ctrls = NULL;
+               }
+       }
+
        return rc;
 }
 
@@ -1656,12 +1730,11 @@ slap_attr_flags( AttributeName *an )
                flags |= ( SLAP_OPATTRS_NO | SLAP_USERATTRS_YES );
 
        } else {
-               flags |= an_find( an, &AllOper )
+               flags |= an_find( an, slap_bv_all_operational_attrs )
                        ? SLAP_OPATTRS_YES : SLAP_OPATTRS_NO;
-               flags |= an_find( an, &AllUser )
+               flags |= an_find( an, slap_bv_all_user_attrs )
                        ? SLAP_USERATTRS_YES : SLAP_USERATTRS_NO;
        }
 
        return flags;
 }
-