Merge remote-tracking branch 'origin/mdb.master' into OPENLDAP_REL_ENG_2_4

[openldap] / servers / slapd / abandon.c

diff --git a/servers/slapd/abandon.c b/servers/slapd/abandon.c
index 9236b9043e077090062ab2d967a9cff3ebf0d36b..3be9d3807dcece79651e2eb3f5e831e4bc59b3e1 100644 (file)
--- a/servers/slapd/abandon.c
+++ b/servers/slapd/abandon.c
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2009 The OpenLDAP Foundation.
+ * Copyright 1998-2014 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,6 +36,7 @@ do_abandon( Operation *op, SlapReply *rs )
 {
        ber_int_t       id;
        Operation       *o;
+       const char      *msg;
 
        Debug( LDAP_DEBUG_TRACE, "%s do_abandon\n",
                op->o_log_prefix, 0, 0 );
@@ -72,28 +73,21 @@ do_abandon( Operation *op, SlapReply *rs )
        }
 
        ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
-       /*
-        * find the operation being abandoned and set the o_abandon
-        * flag.  It's up to the backend to periodically check this
-        * flag and abort the operation at a convenient time.
-        */
 
+       /* Find the operation being abandoned. */
        LDAP_STAILQ_FOREACH( o, &op->o_conn->c_ops, o_next ) {
                if ( o->o_msgid == id ) {
-                       o->o_abandon = 1;
                        break;
                }
        }
 
-       if ( o ) {
-               op->orn_msgid = id;
-
-               op->o_bd = frontendDB;
-               rs->sr_err = frontendDB->be_abandon( op, rs );
-
-       } else {
+       if ( o == NULL ) {
+               msg = "not found";
+               /* The operation is not active. Just discard it if found.  */
                LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
                        if ( o->o_msgid == id ) {
+                               msg = "discarded";
+                               /* FIXME: This traverses c_pending_ops yet again. */
                                LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops,
                                        o, Operation, o_next );
                                LDAP_STAILQ_NEXT(o, o_next) = NULL;
@@ -102,13 +96,35 @@ do_abandon( Operation *op, SlapReply *rs )
                                break;
                        }
                }
+
+       } else if ( o->o_tag == LDAP_REQ_BIND
+                       || o->o_tag == LDAP_REQ_UNBIND
+                       || o->o_tag == LDAP_REQ_ABANDON ) {
+               msg = "cannot be abandoned";
+
+#if 0 /* Would break o_abandon used as "suppress response" flag, ITS#6138 */
+       } else if ( o->o_abandon ) {
+               msg = "already being abandoned";
+#endif
+
+       } else {
+               msg = "found";
+               /* Set the o_abandon flag in the to-be-abandoned operation.
+                * The backend can periodically check this flag and abort the
+                * operation at a convenient time.  However it should "send"
+                * the response anyway, with result code SLAPD_ABANDON.
+                * The functions in result.c will intercept the message.
+                */
+               o->o_abandon = 1;
+               op->orn_msgid = id;
+               op->o_bd = frontendDB;
+               rs->sr_err = frontendDB->be_abandon( op, rs );
        }
 
        ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 
-       Debug( LDAP_DEBUG_TRACE, "%s do_abandon: op=%ld %sfound\n",
-               op->o_log_prefix,
-               (long) id, o ? "" : "not " );
+       Debug( LDAP_DEBUG_TRACE, "%s do_abandon: op=%ld %s\n",
+               op->o_log_prefix, (long) id, msg );
        return rs->sr_err;
 }