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/* delete.c - delete request handler for back-asyncmeta */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2016-2022 The OpenLDAP Foundation.
* Portions Copyright 2016 Symas Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
+ * This work was developed by Symas Corporation
+ * based on back-meta module for inclusion in OpenLDAP Software.
+ * This work was sponsored by Ericsson. */
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include "slap.h"
#include "../../../libraries/liblber/lber-int.h"
#include "../../../libraries/libldap/ldap-int.h"
#include "../back-ldap/back-ldap.h"
#include "back-asyncmeta.h"
meta_search_candidate_t
asyncmeta_back_delete_start(Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
bm_context_t *bc,
int candidate,
int do_lock)
{
a_metainfo_t *mi = mc->mc_info;
a_metatarget_t *mt = mi->mi_targets[ candidate ];
struct berval mdn = BER_BVNULL;
a_dncookie dc;
int rc = 0;
LDAPControl **ctrls = NULL;
meta_search_candidate_t retcode = META_SEARCH_CANDIDATE;
BerElement *ber = NULL;
a_metasingleconn_t *msc = &mc->mc_conns[ candidate ];
SlapReply *candidates = bc->candidates;
ber_int_t msgid;
dc.op = op;
dc.target = mt;
dc.memctx = op->o_tmpmemctx;
dc.to_from = MASSAGE_REQ;
asyncmeta_dn_massage( &dc, &op->o_req_dn, &mdn );
asyncmeta_set_msc_time(msc);
ctrls = op->o_ctrls;
if ( asyncmeta_controls_add( op, rs, mc, candidate, bc->is_root, &ctrls ) != LDAP_SUCCESS )
{
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
retcode = META_SEARCH_ERR;
goto done;
}
/* someone might have reset the connection */
if (!( LDAP_BACK_CONN_ISBOUND( msc )
|| LDAP_BACK_CONN_ISANON( msc )) || msc->msc_ld == NULL ) {
Debug( asyncmeta_debug, "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ );
goto error_unavailable;
}
ber = ldap_build_delete_req( msc->msc_ld, mdn.bv_val, ctrls, NULL, &msgid);
if (!ber) {
Debug( asyncmeta_debug, "%s asyncmeta_back_delete_start: Operation encoding failed with errno %d\n",
op->o_log_prefix, msc->msc_ld->ld_errno );
rs->sr_err = LDAP_OPERATIONS_ERROR;
rs->sr_text = "Failed to encode proxied request";
retcode = META_SEARCH_ERR;
goto done;
}
if (ber) {
struct timeval tv = {0, mt->mt_network_timeout*1000};
ber_socket_t s;
if (!( LDAP_BACK_CONN_ISBOUND( msc )
|| LDAP_BACK_CONN_ISANON( msc )) || msc->msc_ld == NULL ) {
Debug( asyncmeta_debug, "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ );
goto error_unavailable;
}
ldap_get_option( msc->msc_ld, LDAP_OPT_DESC, &s );
if (s < 0) {
Debug( asyncmeta_debug, "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ );
goto error_unavailable;
}
rc = ldap_int_poll( msc->msc_ld, s, &tv, 1);
if (rc < 0) {
Debug( asyncmeta_debug, "msc %p not writable within network timeout %s:%d\n", msc, __FILE__, __LINE__ );
if ((msc->msc_result_time + META_BACK_RESULT_INTERVAL) < slap_get_time()) {
rc = LDAP_SERVER_DOWN;
} else {
goto error_unavailable;
}
} else {
candidates[ candidate ].sr_msgid = msgid;
rc = ldap_send_initial_request( msc->msc_ld, LDAP_REQ_DELETE,
mdn.bv_val, ber, msgid );
if (rc == msgid)
rc = LDAP_SUCCESS;
else
rc = LDAP_SERVER_DOWN;
ber = NULL;
}
switch ( rc ) {
case LDAP_SUCCESS:
retcode = META_SEARCH_CANDIDATE;
asyncmeta_set_msc_time(msc);
goto done;
case LDAP_SERVER_DOWN:
/* do not lock if called from asyncmeta_handle_bind_result. Also do not reset the connection */
if (do_lock > 0) {
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_reset_msc(NULL, mc, candidate, 0, __FUNCTION__);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
}
/* fall though*/
default:
Debug( asyncmeta_debug, "msc %p ldap_send_initial_request failed. %s:%d\n", msc, __FILE__, __LINE__ );
goto error_unavailable;
}
}
error_unavailable:
if (ber)
ber_free(ber, 1);
switch (bc->nretries[candidate]) {
case -1: /* nretries = forever */
retcode = META_SEARCH_NEED_BIND;
ldap_pvt_thread_yield();
break;
case 0: /* no retries left */
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
rs->sr_err = LDAP_UNAVAILABLE;
rs->sr_text = "Unable to send delete request to target";
retcode = META_SEARCH_ERR;
break;
default: /* more retries left - try to rebind and go again */
retcode = META_SEARCH_NEED_BIND;
bc->nretries[candidate]--;
ldap_pvt_thread_yield();
break;
}
done:
(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
if ( mdn.bv_val != op->o_req_dn.bv_val ) {
op->o_tmpfree( mdn.bv_val, op->o_tmpmemctx );
}
Debug( LDAP_DEBUG_TRACE, "%s <<< asyncmeta_back_delete_start[%p]=%d\n", op->o_log_prefix, msc, candidates[candidate].sr_msgid );
return retcode;
}
int
asyncmeta_back_delete( Operation *op, SlapReply *rs )
{
a_metainfo_t *mi = ( a_metainfo_t * )op->o_bd->be_private;
a_metatarget_t *mt;
a_metaconn_t *mc;
int rc, candidate = -1;
void *thrctx = op->o_threadctx;
bm_context_t *bc;
SlapReply *candidates;
time_t current_time = slap_get_time();
int max_pending_ops = (mi->mi_max_pending_ops == 0) ? META_BACK_CFG_MAX_PENDING_OPS : mi->mi_max_pending_ops;
Debug(LDAP_DEBUG_TRACE, "==> asyncmeta_back_delete: %s\n",
op->o_req_dn.bv_val );
if (current_time > op->o_time) {
Debug(asyncmeta_debug, "==> asyncmeta_back_delete[%s]: o_time:[%ld], current time: [%ld]\n",
op->o_log_prefix, op->o_time, current_time );
}
asyncmeta_new_bm_context(op, rs, &bc, mi->mi_ntargets, mi );
if (bc == NULL) {
rs->sr_err = LDAP_OTHER;
send_ldap_result(op, rs);
return rs->sr_err;
}
candidates = bc->candidates;
mc = asyncmeta_getconn( op, rs, candidates, &candidate, LDAP_BACK_DONTSEND, 0);
if ( !mc || rs->sr_err != LDAP_SUCCESS) {
send_ldap_result(op, rs);
return rs->sr_err;
}
mt = mi->mi_targets[ candidate ];
bc->timeout = mt->mt_timeout[ SLAP_OP_DELETE ];
bc->retrying = LDAP_BACK_RETRYING;
bc->sendok = ( LDAP_BACK_SENDRESULT | bc->retrying );
bc->stoptime = op->o_time + bc->timeout;
bc->bc_active = 1;
if (mc->pending_ops >= max_pending_ops) {
rs->sr_err = LDAP_BUSY;
rs->sr_text = "Maximum pending ops limit exceeded";
send_ldap_result(op, rs);
return rs->sr_err;
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
rc = asyncmeta_add_message_queue(mc, bc);
mc->mc_conns[candidate].msc_active++;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
if (rc != LDAP_SUCCESS) {
rs->sr_err = LDAP_BUSY;
rs->sr_text = "Maximum pending ops limit exceeded";
send_ldap_result(op, rs);
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
mc->mc_conns[candidate].msc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
goto finish;
}
retry:
if (bc->timeout && bc->stoptime < slap_get_time()) {
int timeout_err;
timeout_err = op->o_protocol >= LDAP_VERSION3 ?
LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
rs->sr_err = timeout_err;
rs->sr_text = "Operation timed out before it was sent to target";
asyncmeta_error_cleanup(op, rs, bc, mc, candidate);
goto finish;
}
rc = asyncmeta_dobind_init_with_retry(op, rs, bc, mc, candidate);
switch (rc)
{
case META_SEARCH_CANDIDATE:
/* target is already bound, just send the request */
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_delete: "
"cnd=\"%d\"\n", op->o_log_prefix, candidate );
rc = asyncmeta_back_delete_start( op, rs, mc, bc, candidate, 1);
if (rc == META_SEARCH_ERR) {
asyncmeta_error_cleanup(op, rs, bc, mc, candidate);
goto finish;
} else if (rc == META_SEARCH_NEED_BIND) {
goto retry;
}
break;
case META_SEARCH_NOT_CANDIDATE:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_delete: NOT_CANDIDATE "
"cnd=\"%d\"\n", op->o_log_prefix, candidate );
asyncmeta_error_cleanup(op, rs, bc, mc, candidate);
goto finish;
case META_SEARCH_NEED_BIND:
case META_SEARCH_BINDING:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_delete: BINDING "
"cnd=\"%d\" %p\n", op->o_log_prefix, candidate , &mc->mc_conns[candidate]);
/* Todo add the context to the message queue but do not send the request
the receiver must send this when we are done binding */
/* question - how would do receiver know to which targets??? */
break;
case META_SEARCH_ERR:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_delete: ERR "
"cnd=\"%d\"\n", op->o_log_prefix, candidate );
asyncmeta_error_cleanup(op, rs, bc, mc, candidate);
goto finish;
default:
assert( 0 );
break;
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
mc->mc_conns[candidate].msc_active--;
asyncmeta_start_one_listener(mc, candidates, bc, candidate);
bc->bc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
rs->sr_err = SLAPD_ASYNCOP;
finish:
return rs->sr_err;
}
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