static void
asyncmeta_handle_onerr_stop(Operation *op,
SlapReply *rs,
a_metaconn_t *mc,
bm_context_t *bc,
int candidate,
slap_callback *cb)
{
a_metainfo_t *mi = mc->mc_info;
int j;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
if (bc->bc_active > 0) {
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
return;
}
bc->bc_active = 1;
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
for (j=0; j<mi->mi_ntargets; j++) {
if (j != candidate && bc->candidates[j].sr_msgid >= 0
&& mc->mc_conns[j].msc_ld != NULL) {
asyncmeta_back_abandon_candidate( mc, op,
bc->candidates[ j ].sr_msgid, j );
}
}
if (cb != NULL) {
op->o_callback = cb;
}
send_ldap_result(op, rs);
asyncmeta_clear_bm_context(bc);
}
meta_search_candidate_t
asyncmeta_send_all_pending_ops(a_metaconn_t *mc, int candidate, void *ctx, int dolock)
{
a_metainfo_t *mi = mc->mc_info;
bm_context_t *bc, *onext;
a_metasingleconn_t *msc = &mc->mc_conns[candidate];
if ( dolock )
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
msc->msc_active++;
for (bc = LDAP_STAILQ_FIRST(&mc->mc_om_list); bc; bc = onext) {
meta_search_candidate_t ret;
onext = LDAP_STAILQ_NEXT(bc, bc_next);
if (bc->candidates[candidate].sr_msgid != META_MSGID_NEED_BIND || bc->bc_active > 0 || bc->op->o_abandon > 0) {
continue;
}
bc->op->o_threadctx = ctx;
bc->op->o_tid = ldap_pvt_thread_pool_tid( ctx );
slap_sl_mem_setctx(ctx, bc->op->o_tmpmemctx);
bc->bc_active++;
ret = asyncmeta_send_pending_op(bc, candidate);
if (ret != META_SEARCH_CANDIDATE) {
bc->candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
bc->candidates[ candidate ].sr_type = REP_RESULT;
bc->candidates[ candidate ].sr_err = bc->rs.sr_err;
if (bc->op->o_tag != LDAP_REQ_SEARCH || (META_BACK_ONERR_STOP( mi )) ||
(asyncmeta_is_last_result(mc, bc, candidate) == 0)) {
LDAP_STAILQ_REMOVE(&mc->mc_om_list, bc, bm_context_t, bc_next);
mc->pending_ops--;
asyncmeta_send_ldap_result(bc, bc->op, &bc->rs);
asyncmeta_clear_bm_context(bc);
}
} else {
bc->bc_active--;
}
}
msc->msc_active--;
if ( dolock )
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return META_SEARCH_CANDIDATE;
}
int
asyncmeta_back_compare( 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;
OperationBuffer opbuf;
bm_context_t *bc;
SlapReply *candidates;
slap_callback *cb = op->o_callback;
Debug(LDAP_DEBUG_ARGS, "==> asyncmeta_back_compare: %s\n",
op->o_req_dn.bv_val, 0, 0 );
asyncmeta_new_bm_context(op, rs, &bc, mi->mi_ntargets );
if (bc == NULL) {
rs->sr_err = LDAP_OTHER;
asyncmeta_sender_error(op, rs, cb);
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) {
asyncmeta_sender_error(op, rs, cb);
asyncmeta_clear_bm_context(bc);
return rs->sr_err;
}
mt = mi->mi_targets[ candidate ];
bc->timeout = mt->mt_timeout[ SLAP_OP_COMPARE ];
bc->retrying = LDAP_BACK_RETRYING;
bc->sendok = ( LDAP_BACK_SENDRESULT | bc->retrying );
bc->stoptime = op->o_time + bc->timeout;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
rc = asyncmeta_add_message_queue(mc, bc);
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";
asyncmeta_clear_bm_context(bc);
asyncmeta_sender_error(op, rs, cb);
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_compare: "
"cnd=\"%ld\"\n", op->o_log_prefix, candidate , 0);
rc = asyncmeta_back_compare_start( op, rs, mc, bc, candidate);
if (rc == META_SEARCH_ERR) {
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
asyncmeta_sender_error(op, rs, cb);
asyncmeta_clear_bm_context(bc);
goto finish;
}
break;
case META_SEARCH_NOT_CANDIDATE:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_compare: NOT_CANDIDATE "
"cnd=\"%ld\"\n", op->o_log_prefix, candidate , 0);
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
asyncmeta_sender_error(op, rs, cb);
asyncmeta_clear_bm_context(bc);
goto finish;
case META_SEARCH_NEED_BIND:
case META_SEARCH_CONNECTING:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_compare: NEED_BIND "
"cnd=\"%ld\" %p\n", op->o_log_prefix, candidate , &mc->mc_conns[candidate]);
rc = asyncmeta_dobind_init(op, rs, bc, mc, candidate);
if (rc == META_SEARCH_ERR) {
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
asyncmeta_sender_error(op, rs, cb);
asyncmeta_clear_bm_context(bc);
goto finish;
}
break;
case META_SEARCH_BINDING:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_compare: BINDING "
"cnd=\"%ld\" %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_compare: ERR "
"cnd=\"%ldd\"\n", op->o_log_prefix, candidate , 0);
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
candidates[ candidate ].sr_type = REP_RESULT;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
asyncmeta_sender_error(op, rs, cb);
asyncmeta_clear_bm_context(bc);
goto finish;
default:
assert( 0 );
break;
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_start_one_listener(mc, candidates, bc, candidate);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
finish:
return rs->sr_err;
}
int
asyncmeta_handle_search_msg(LDAPMessage *res, a_metaconn_t *mc, bm_context_t *bc, int candidate)
{
a_metainfo_t *mi;
a_metatarget_t *mt;
a_metasingleconn_t *msc;
Operation *op = bc->op;
SlapReply *rs;
int i, rc = LDAP_SUCCESS, sres;
SlapReply *candidates;
char **references = NULL;
LDAPControl **ctrls = NULL;
a_dncookie dc;
LDAPMessage *msg;
ber_int_t id;
rs = &bc->rs;
mi = mc->mc_info;
mt = mi->mi_targets[ candidate ];
msc = &mc->mc_conns[ candidate ];
dc.op = op;
dc.target = mt;
dc.to_from = MASSAGE_REP;
id = ldap_msgid(res);
candidates = bc->candidates;
i = candidate;
while (res && !META_BACK_CONN_INVALID(msc)) {
for (msg = ldap_first_message(msc->msc_ldr, res); msg; msg = ldap_next_message(msc->msc_ldr, msg)) {
switch(ldap_msgtype(msg)) {
case LDAP_RES_SEARCH_ENTRY:
Debug( LDAP_DEBUG_TRACE,
"%s asyncmeta_handle_search_msg: msc %p entry\n",
op->o_log_prefix, msc );
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
/* count entries returned by target */
candidates[ i ].sr_nentries++;
if (bc->c_peer_name.bv_val == op->o_conn->c_peer_name.bv_val && !op->o_abandon) {
rs->sr_err = asyncmeta_send_entry( &bc->copy_op, rs, mc, i, msg );
} else {
goto err_cleanup;
}
switch ( rs->sr_err ) {
case LDAP_SIZELIMIT_EXCEEDED:
asyncmeta_send_ldap_result(bc, op, rs);
rs->sr_err = LDAP_SUCCESS;
goto err_cleanup;
case LDAP_UNAVAILABLE:
rs->sr_err = LDAP_OTHER;
break;
default:
break;
}
bc->is_ok++;
break;
case LDAP_RES_SEARCH_REFERENCE:
if ( META_BACK_TGT_NOREFS( mt ) ) {
rs->sr_err = LDAP_OTHER;
asyncmeta_send_ldap_result(bc, op, rs);
goto err_cleanup;
}
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
bc->is_ok++;
rc = ldap_parse_reference( msc->msc_ldr, msg,
&references, &rs->sr_ctrls, 0 );
if ( rc != LDAP_SUCCESS || references == NULL ) {
rs->sr_err = LDAP_OTHER;
asyncmeta_send_ldap_result(bc, op, rs);
goto err_cleanup;
}
/* FIXME: merge all and return at the end */
{
int cnt;
for ( cnt = 0; references[ cnt ]; cnt++ )
;
rs->sr_ref = ber_memalloc_x( sizeof( struct berval ) * ( cnt + 1 ),
op->o_tmpmemctx );
for ( cnt = 0; references[ cnt ]; cnt++ ) {
ber_str2bv_x( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ],
op->o_tmpmemctx );
}
BER_BVZERO( &rs->sr_ref[ cnt ] );
}
{
dc.memctx = op->o_tmpmemctx;
( void )asyncmeta_referral_result_rewrite( &dc, rs->sr_ref );
}
if ( rs->sr_ref != NULL ) {
if (!BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
/* ignore return value by now */
( void )send_search_reference( op, rs );
}
ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
rs->sr_ref = NULL;
}
/* cleanup */
if ( references ) {
ber_memvfree( (void **)references );
}
if ( rs->sr_ctrls ) {
ldap_controls_free( rs->sr_ctrls );
rs->sr_ctrls = NULL;
}
break;
case LDAP_RES_INTERMEDIATE:
if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
/* don't retry any more... */
candidates[ i ].sr_type = REP_RESULT;
}
bc->is_ok++;
/* FIXME: response controls
* are passed without checks */
rs->sr_err = ldap_parse_intermediate( msc->msc_ldr,
msg,
(char **)&rs->sr_rspoid,
&rs->sr_rspdata,
&rs->sr_ctrls,
0 );
if ( rs->sr_err != LDAP_SUCCESS ) {
candidates[ i ].sr_type = REP_RESULT;
rs->sr_err = LDAP_OTHER;
asyncmeta_send_ldap_result(bc, op, rs);
goto err_cleanup;
}
slap_send_ldap_intermediate( op, rs );
if ( rs->sr_rspoid != NULL ) {
ber_memfree( (char *)rs->sr_rspoid );
rs->sr_rspoid = NULL;
}
if ( rs->sr_rspdata != NULL ) {
ber_bvfree( rs->sr_rspdata );
rs->sr_rspdata = NULL;
}
if ( rs->sr_ctrls != NULL ) {
ldap_controls_free( rs->sr_ctrls );
rs->sr_ctrls = NULL;
}
break;
case LDAP_RES_SEARCH_RESULT:
if ( mi->mi_idle_timeout != 0 ) {
asyncmeta_set_msc_time(msc);
}
Debug( LDAP_DEBUG_TRACE,
"%s asyncmeta_handle_search_msg: msc %p result\n",
op->o_log_prefix, msc );
candidates[ i ].sr_type = REP_RESULT;
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
/* NOTE: ignores response controls
* (and intermediate response controls
* as well, except for those with search
* references); this may not be correct,
* but if they're not ignored then
* back-meta would need to merge them
* consistently (think of pagedResults...)
*/
/* FIXME: response controls? */
rs->sr_err = ldap_parse_result( msc->msc_ldr,
msg,
&candidates[ i ].sr_err,
(char **)&candidates[ i ].sr_matched,
(char **)&candidates[ i ].sr_text,
&references,
&ctrls /* &candidates[ i ].sr_ctrls (unused) */ ,
0 );
if ( rs->sr_err != LDAP_SUCCESS ) {
candidates[ i ].sr_err = rs->sr_err;
sres = slap_map_api2result( &candidates[ i ] );
candidates[ i ].sr_type = REP_RESULT;
goto finish;
}
rs->sr_err = candidates[ i ].sr_err;
/* massage matchedDN if need be */
if ( candidates[ i ].sr_matched != NULL ) {
struct berval match, mmatch;
ber_str2bv( candidates[ i ].sr_matched,
0, 0, &match );
candidates[ i ].sr_matched = NULL;
dc.memctx = NULL;
asyncmeta_dn_massage( &dc, &match, &mmatch );
if ( mmatch.bv_val == match.bv_val ) {
candidates[ i ].sr_matched
= ch_strdup( mmatch.bv_val );
} else {
candidates[ i ].sr_matched = mmatch.bv_val;
}
bc->candidate_match++;
ldap_memfree( match.bv_val );
}
/* add references to array */
/* RFC 4511: referrals can only appear
* if result code is LDAP_REFERRAL */
if ( references != NULL
&& references[ 0 ] != NULL
&& references[ 0 ][ 0 ] != '\0' )
{
if ( rs->sr_err != LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s asncmeta_search_result[%d]: "
"got referrals with err=%d\n",
op->o_log_prefix,
i, rs->sr_err );
} else {
BerVarray sr_ref;
int cnt;
for ( cnt = 0; references[ cnt ]; cnt++ )
;
sr_ref = ber_memalloc_x( sizeof( struct berval ) * ( cnt + 1 ),
op->o_tmpmemctx );
for ( cnt = 0; references[ cnt ]; cnt++ ) {
ber_str2bv_x( references[ cnt ], 0, 1, &sr_ref[ cnt ],
op->o_tmpmemctx );
}
BER_BVZERO( &sr_ref[ cnt ] );
dc.memctx = op->o_tmpmemctx;
( void )asyncmeta_referral_result_rewrite( &dc, sr_ref );
if ( rs->sr_v2ref == NULL ) {
rs->sr_v2ref = sr_ref;
} else {
for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
ber_bvarray_add_x( &rs->sr_v2ref, &sr_ref[ cnt ],
op->o_tmpmemctx );
}
ber_memfree_x( sr_ref, op->o_tmpmemctx );
}
}
} else if ( rs->sr_err == LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_TRACE,
"%s asyncmeta_search_result[%d]: "
"got err=%d with null "
"or empty referrals\n",
op->o_log_prefix,
i, rs->sr_err );
rs->sr_err = LDAP_NO_SUCH_OBJECT;
}
/* cleanup */
ber_memvfree( (void **)references );
sres = slap_map_api2result( rs );
if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_search_result[%d] "
"match=\"%s\" err=%ld",
op->o_log_prefix, i,
candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
(long) candidates[ i ].sr_err );
} else {
Debug( LDAP_DEBUG_ANY, "%s asyncmeta_search_result[%d] "
"match=\"%s\" err=%ld (%s)",
op->o_log_prefix, i,
candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
(long) candidates[ i ].sr_err, ldap_err2string( candidates[ i ].sr_err ) );
}
switch ( sres ) {
case LDAP_NO_SUCH_OBJECT:
/* is_ok is touched any time a valid
* (even intermediate) result is
* returned; as a consequence, if
* a candidate returns noSuchObject
* it is ignored and the candidate
* is simply demoted. */
if ( bc->is_ok ) {
sres = LDAP_SUCCESS;
}
break;
case LDAP_SUCCESS:
if ( ctrls != NULL && ctrls[0] != NULL ) {
#ifdef SLAPD_META_CLIENT_PR
LDAPControl *pr_c;
pr_c = ldap_control_find( LDAP_CONTROL_PAGEDRESULTS, ctrls, NULL );
if ( pr_c != NULL ) {
BerElementBuffer berbuf;
BerElement *ber = (BerElement *)&berbuf;
ber_tag_t tag;
ber_int_t prsize;
struct berval prcookie;
/* unsolicited, do not accept */
if ( mt->mt_ps == 0 ) {
rs->sr_err = LDAP_OTHER;
goto err_pr;
}
ber_init2( ber, &pr_c->ldctl_value, LBER_USE_DER );
tag = ber_scanf( ber, "{im}", &prsize, &prcookie );
if ( tag == LBER_ERROR ) {
rs->sr_err = LDAP_OTHER;
goto err_pr;
}
/* more pages? new search request */
if ( !BER_BVISNULL( &prcookie ) && !BER_BVISEMPTY( &prcookie ) ) {
if ( mt->mt_ps > 0 ) {
/* ignore size if specified */
prsize = 0;
} else if ( prsize == 0 ) {
/* guess the page size from the entries returned so far */
prsize = candidates[ i ].sr_nentries;
}
candidates[ i ].sr_nentries = 0;
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
candidates[ i ].sr_type = REP_INTERMEDIATE;
assert( candidates[ i ].sr_matched == NULL );
assert( candidates[ i ].sr_text == NULL );
assert( candidates[ i ].sr_ref == NULL );
switch ( asyncmeta_back_search_start( &bc->copy_op, rs, mc, bc, i, &prcookie, prsize, 1 ) )
{
case META_SEARCH_CANDIDATE:
assert( candidates[ i ].sr_msgid >= 0 );
ldap_controls_free( ctrls );
// goto free_message;
case META_SEARCH_ERR:
case META_SEARCH_NEED_BIND:
err_pr:;
candidates[ i ].sr_err = rs->sr_err;
candidates[ i ].sr_type = REP_RESULT;
if ( META_BACK_ONERR_STOP( mi ) ) {
asyncmeta_send_ldap_result(bc, op, rs);
ldap_controls_free( ctrls );
goto err_cleanup;
}
/* fallthru */
case META_SEARCH_NOT_CANDIDATE:
/* means that asyncmeta_back_search_start()
* failed but onerr == continue */
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
candidates[ i ].sr_type = REP_RESULT;
break;
default:
/* impossible */
assert( 0 );
break;
}
break;
}
}
#endif /* SLAPD_META_CLIENT_PR */
ldap_controls_free( ctrls );
}
/* fallthru */
case LDAP_REFERRAL:
bc->is_ok++;
break;
case LDAP_SIZELIMIT_EXCEEDED:
/* if a target returned sizelimitExceeded
* and the entry count is equal to the
* proxy's limit, the target would have
* returned more, and the error must be
* propagated to the client; otherwise,
* the target enforced a limit lower
* than what requested by the proxy;
* ignore it */
candidates[ i ].sr_err = rs->sr_err;
if ( rs->sr_nentries == op->ors_slimit
|| META_BACK_ONERR_STOP( mi ) )
{
const char *save_text;
got_err:
save_text = rs->sr_text;
rs->sr_text = candidates[ i ].sr_text;
asyncmeta_send_ldap_result(bc, op, rs);
if (candidates[ i ].sr_text != NULL) {
ch_free( (char *)candidates[ i ].sr_text );
candidates[ i ].sr_text = NULL;
}
rs->sr_text = save_text;
ldap_controls_free( ctrls );
goto err_cleanup;
}
break;
default:
candidates[ i ].sr_err = rs->sr_err;
if ( META_BACK_ONERR_STOP( mi ) ) {
goto got_err;
}
break;
}
/* if this is the last result we will ever receive, send it back */
rc = rs->sr_err;
if (asyncmeta_is_last_result(mc, bc, i) == 0) {
Debug( LDAP_DEBUG_TRACE,
"%s asyncmeta_handle_search_msg: msc %p last result\n",
op->o_log_prefix, msc );
asyncmeta_search_last_result(mc, bc, i, sres);
err_cleanup:
rc = rs->sr_err;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
asyncmeta_drop_bc( mc, bc);
asyncmeta_clear_bm_context(bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
ldap_msgfree(res);
return rc;
}
finish:
break;
default:
continue;
}
}
ldap_msgfree(res);
res = NULL;
if (candidates[ i ].sr_type != REP_RESULT) {
struct timeval tv = {0};
rc = ldap_result( msc->msc_ldr, id, LDAP_MSG_RECEIVED, &tv, &res );
if (res != NULL) {
msc->msc_result_time = slap_get_time();
}
}
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
bc->bc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return rc;
}
void* asyncmeta_timeout_loop(void *ctx, void *arg)
{
struct re_s* rtask = arg;
a_metainfo_t *mi = rtask->arg;
bm_context_t *bc, *onext;
time_t current_time = slap_get_time();
int i, j;
LDAP_STAILQ_HEAD(BCList, bm_context_t) timeout_list;
LDAP_STAILQ_INIT( &timeout_list );
Debug( asyncmeta_debug, "asyncmeta_timeout_loop[%p] start at [%ld] \n", rtask, current_time );
void *oldctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 0);
for (i=0; i<mi->mi_num_conns; i++) {
a_metaconn_t * mc= &mi->mi_conns[i];
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
for (bc = LDAP_STAILQ_FIRST(&mc->mc_om_list); bc; bc = onext) {
onext = LDAP_STAILQ_NEXT(bc, bc_next);
if (bc->bc_active > 0) {
continue;
}
if (bc->op->o_abandon ) {
/* set our memctx */
bc->op->o_threadctx = ctx;
bc->op->o_tid = ldap_pvt_thread_pool_tid( ctx );
slap_sl_mem_setctx(ctx, bc->op->o_tmpmemctx);
Operation *op = bc->op;
LDAP_STAILQ_REMOVE(&mc->mc_om_list, bc, bm_context_t, bc_next);
mc->pending_ops--;
for (j=0; j<mi->mi_ntargets; j++) {
if (bc->candidates[j].sr_msgid >= 0) {
a_metasingleconn_t *msc = &mc->mc_conns[j];
if ( op->o_tag == LDAP_REQ_SEARCH ) {
msc->msc_active++;
asyncmeta_back_cancel( mc, op,
bc->candidates[ j ].sr_msgid, j );
msc->msc_active--;
}
}
}
asyncmeta_clear_bm_context(bc);
continue;
}
if (bc->bc_invalid) {
LDAP_STAILQ_REMOVE(&mc->mc_om_list, bc, bm_context_t, bc_next);
mc->pending_ops--;
LDAP_STAILQ_INSERT_TAIL( &timeout_list, bc, bc_next);
continue;
}
if (bc->timeout && bc->stoptime < current_time) {
Operation *op = bc->op;
LDAP_STAILQ_REMOVE(&mc->mc_om_list, bc, bm_context_t, bc_next);
mc->pending_ops--;
LDAP_STAILQ_INSERT_TAIL( &timeout_list, bc, bc_next);
for (j=0; j<mi->mi_ntargets; j++) {
if (bc->candidates[j].sr_msgid >= 0) {
a_metasingleconn_t *msc = &mc->mc_conns[j];
asyncmeta_set_msc_time(msc);
if ( op->o_tag == LDAP_REQ_SEARCH ) {
msc->msc_active++;
asyncmeta_back_cancel( mc, op,
bc->candidates[ j ].sr_msgid, j );
msc->msc_active--;
}
}
}
}
}
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
for (bc = LDAP_STAILQ_FIRST(&timeout_list); bc; bc = onext) {
Operation *op = bc->op;
SlapReply *rs = &bc->rs;
int timeout_err;
const char *timeout_text;
onext = LDAP_STAILQ_NEXT(bc, bc_next);
LDAP_STAILQ_REMOVE(&timeout_list, bc, bm_context_t, bc_next);
/* set our memctx */
bc->op->o_threadctx = ctx;
bc->op->o_tid = ldap_pvt_thread_pool_tid( ctx );
slap_sl_mem_setctx(ctx, bc->op->o_tmpmemctx);
if (bc->searchtime) {
timeout_err = LDAP_TIMELIMIT_EXCEEDED;
} else {
timeout_err = op->o_protocol >= LDAP_VERSION3 ?
LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
}
if ( bc->bc_invalid ) {
timeout_text = "Operation is invalid - target connection has been reset";
} else {
a_metasingleconn_t *log_msc = &mc->mc_conns[0];
Debug( asyncmeta_debug,
"asyncmeta_timeout_loop:Timeout op %s loop[%p], "
"current_time:%ld, op->o_time:%ld msc: %p, "
"msc->msc_binding_time: %x, msc->msc_flags:%x \n",
bc->op->o_log_prefix, rtask, current_time, bc->op->o_time,
log_msc, (unsigned int)log_msc->msc_binding_time, log_msc->msc_mscflags );
if (bc->searchtime) {
timeout_text = NULL;
} else {
timeout_text = "Operation timed out";
}
for (j=0; j<mi->mi_ntargets; j++) {
if (bc->candidates[j].sr_msgid >= 0) {
a_metatarget_t *mt = mi->mi_targets[j];
if (!META_BACK_TGT_QUARANTINE( mt ) ||
bc->candidates[j].sr_type == REP_RESULT) {
continue;
}
if (mt->mt_isquarantined > LDAP_BACK_FQ_NO) {
timeout_err = LDAP_UNAVAILABLE;
} else {
mt->mt_timeout_ops++;
if ((mi->mi_max_timeout_ops > 0) &&
(mt->mt_timeout_ops > mi->mi_max_timeout_ops)) {
timeout_err = LDAP_UNAVAILABLE;
rs->sr_err = timeout_err;
if (mt->mt_isquarantined == LDAP_BACK_FQ_NO)
asyncmeta_quarantine(op, mi, rs, j);
}
}
}
}
}
rs->sr_err = timeout_err;
rs->sr_text = timeout_text;
if (!bc->op->o_abandon ) {
asyncmeta_send_ldap_result( bc, bc->op, &bc->rs );
}
asyncmeta_clear_bm_context(bc);
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
if (mi->mi_idle_timeout) {
for (j=0; j<mi->mi_ntargets; j++) {
a_metasingleconn_t *msc = &mc->mc_conns[j];
if ( msc->msc_active > 0 ) {
continue;
}
if (mc->pending_ops > 0) {
continue;
}
current_time = slap_get_time();
if (msc->msc_ld && msc->msc_time > 0 && msc->msc_time + mi->mi_idle_timeout < current_time) {
asyncmeta_clear_one_msc(NULL, mc, j, 1, __FUNCTION__);
}
}
}
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
}
slap_sl_mem_setctx(ctx, oldctx);
current_time = slap_get_time();
Debug( asyncmeta_debug, "asyncmeta_timeout_loop[%p] stop at [%ld] \n", rtask, current_time );
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
}
rtask->interval.tv_sec = 1;
rtask->interval.tv_usec = 0;
ldap_pvt_runqueue_resched(&slapd_rq, rtask, 0);
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
return NULL;
}
void *
asyncmeta_op_handle_result(void *ctx, void *arg)
{
a_metaconn_t *mc = arg;
int i, j, rc, ntargets;
struct timeval tv = {0};
LDAPMessage *msg;
a_metasingleconn_t *msc;
bm_context_t *bc;
void *oldctx;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
rc = ++mc->mc_active;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if (rc > 1)
return NULL;
ntargets = mc->mc_info->mi_ntargets;
i = ntargets;
oldctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 0); /* get existing memctx */
again:
for (j=0; j<ntargets; j++) {
i++;
if (i >= ntargets) i = 0;
msc = &mc->mc_conns[i];
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
if (!mc->mc_conns[i].msc_ldr ||
META_BACK_CONN_CREATING( &mc->mc_conns[i] ) ||
META_BACK_CONN_INVALID(&mc->mc_conns[i])) {
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
continue;
}
msc->msc_active++;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
rc = ldap_result( mc->mc_conns[i].msc_ldr, LDAP_RES_ANY, LDAP_MSG_RECEIVED, &tv, &msg );
if (rc < 1) {
if (rc < 0) {
ldap_get_option( mc->mc_conns[i].msc_ldr, LDAP_OPT_ERROR_NUMBER, &rc);
META_BACK_CONN_INVALID_SET(&mc->mc_conns[i]);
asyncmeta_op_read_error(mc, i, rc, ctx);
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
msc->msc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
continue;
}
rc = ldap_msgtype( msg );
if (rc == LDAP_RES_BIND) {
if ( LogTest( asyncmeta_debug ) ) {
char time_buf[ SLAP_TEXT_BUFLEN ];
asyncmeta_get_timestamp(time_buf);
Debug( asyncmeta_debug, "[%s] asyncmeta_op_handle_result received bind msgid=%d msc: %p\n",
time_buf, ldap_msgid(msg), msc );
}
asyncmeta_handle_bind_result(msg, mc, i, ctx);
mc->mc_info->mi_targets[i]->mt_timeout_ops = 0;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
msc->msc_result_time = slap_get_time();
msc->msc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if (msg)
ldap_msgfree(msg);
continue;
}
retry_bc:
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
bc = asyncmeta_find_message(ldap_msgid(msg), mc, i);
/* The sender might not be yet done with the context. On error it might also remove it
* so it's best to try and find it again after a wait */
if (bc && bc->bc_active > 0) {
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
ldap_pvt_thread_yield();
goto retry_bc;
}
if (bc) {
bc->bc_active++;
}
msc->msc_result_time = slap_get_time();
msc->msc_active--;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if (!bc) {
Debug( asyncmeta_debug,
"asyncmeta_op_handle_result: Unable to find bc for msguid %d, msc: %p\n", ldap_msgid(msg), msc );
ldap_msgfree(msg);
continue;
}
/* set our memctx */
bc->op->o_threadctx = ctx;
bc->op->o_tid = ldap_pvt_thread_pool_tid( ctx );
slap_sl_mem_setctx(ctx, bc->op->o_tmpmemctx);
if (bc->op->o_abandon) {
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
asyncmeta_drop_bc( mc, bc);
if ( bc->op->o_tag == LDAP_REQ_SEARCH ) {
int j;
for (j=0; j<ntargets; j++) {
if (bc->candidates[j].sr_msgid >= 0) {
a_metasingleconn_t *tmp_msc = &mc->mc_conns[j];
tmp_msc->msc_active++;
asyncmeta_back_cancel( mc, bc->op,
bc->candidates[ j ].sr_msgid, j );
tmp_msc->msc_active--;
}
}
}
asyncmeta_clear_bm_context(bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if (msg)
ldap_msgfree(msg);
continue;
}
switch (rc) {
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REFERENCE:
case LDAP_RES_SEARCH_RESULT:
case LDAP_RES_INTERMEDIATE:
asyncmeta_handle_search_msg(msg, mc, bc, i);
mc->mc_info->mi_targets[i]->mt_timeout_ops = 0;
msg = NULL;
break;
case LDAP_RES_ADD:
case LDAP_RES_DELETE:
case LDAP_RES_MODDN:
case LDAP_RES_COMPARE:
case LDAP_RES_MODIFY:
rc = asyncmeta_handle_common_result(msg, mc, bc, i);
mc->mc_info->mi_targets[i]->mt_timeout_ops = 0;
break;
default:
{
Debug( asyncmeta_debug,
"asyncmeta_op_handle_result: "
"unrecognized response message tag=%d\n",
rc );
}
}
if (msg)
ldap_msgfree(msg);
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
rc = --mc->mc_active;
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if (rc) {
i++;
goto again;
}
slap_sl_mem_setctx(ctx, oldctx);
if (mc->mc_conns) {
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
for (i=0; i<ntargets; i++) {
if (!slapd_shutdown && !META_BACK_CONN_INVALID(msc)
&& mc->mc_conns[i].msc_ldr && mc->mc_conns[i].conn) {
connection_client_enable(mc->mc_conns[i].conn);
}
}
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
}
return NULL;
}
/* This takes care to clean out the outbound queue in case we have a read error
* sending back responses to the client */
int
asyncmeta_op_read_error(a_metaconn_t *mc, int candidate, int error, void* ctx)
{
bm_context_t *bc, *onext;
int cleanup;
Operation *op;
SlapReply *rs;
SlapReply *candidates;
/* no outstanding ops, nothing to do but log */
Debug( LDAP_DEBUG_TRACE,
"asyncmeta_op_read_error: ldr=%p\n",
mc->mc_conns[candidate].msc_ldr );
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
/*someone may be trying to write */
if (mc->mc_conns[candidate].msc_active <= 1) {
asyncmeta_clear_one_msc(NULL, mc, candidate, 0, __FUNCTION__);
} else {
META_BACK_CONN_INVALID_SET(&mc->mc_conns[candidate]);
}
if (mc->pending_ops <= 0) {
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return LDAP_SUCCESS;
}
for (bc = LDAP_STAILQ_FIRST(&mc->mc_om_list); bc; bc = onext) {
onext = LDAP_STAILQ_NEXT(bc, bc_next);
cleanup = 0;
candidates = bc->candidates;
/* was this op affected? */
if ( !META_IS_CANDIDATE( &candidates[ candidate ] ) )
continue;
if (bc->op->o_abandon) {
bc->bc_invalid = 1;
continue;
}
if (bc->bc_active > 0) {
continue;
}
bc->op->o_threadctx = ctx;
bc->op->o_tid = ldap_pvt_thread_pool_tid( ctx );
slap_sl_mem_setctx(ctx, bc->op->o_tmpmemctx);
op = bc->op;
rs = &bc->rs;
switch (op->o_tag) {
case LDAP_REQ_ADD:
case LDAP_REQ_MODIFY:
case LDAP_REQ_MODRDN:
case LDAP_REQ_COMPARE:
case LDAP_REQ_DELETE:
rs->sr_err = LDAP_UNAVAILABLE;
rs->sr_text = "Read error on connection to target";
asyncmeta_send_ldap_result( bc, op, rs );
cleanup = 1;
break;
case LDAP_REQ_SEARCH:
{
a_metainfo_t *mi = mc->mc_info;
rs->sr_err = LDAP_UNAVAILABLE;
rs->sr_text = "Read error on connection to target";
candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
candidates[ candidate ].sr_type = REP_RESULT;
if ( (META_BACK_ONERR_STOP( mi ) ||
asyncmeta_is_last_result(mc, bc, candidate)) && op->o_conn) {
asyncmeta_send_ldap_result( bc, op, rs );
cleanup = 1;
}
}
break;
default:
break;
}
if (cleanup) {
int j;
a_metainfo_t *mi = mc->mc_info;
for (j=0; j<mi->mi_ntargets; j++) {
if (j != candidate && bc->candidates[j].sr_msgid >= 0
&& mc->mc_conns[j].msc_ld != NULL) {
asyncmeta_back_cancel( mc, op,
bc->candidates[ j ].sr_msgid, j );
}
}
LDAP_STAILQ_REMOVE(&mc->mc_om_list, bc, bm_context_t, bc_next);
mc->pending_ops--;
asyncmeta_clear_bm_context(bc);
}
}
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return LDAP_SUCCESS;
}
int asyncmeta_handle_common_result(LDAPMessage *msg, a_metaconn_t *mc, bm_context_t *bc, int candidate)
{
a_metainfo_t *mi;
a_metatarget_t *mt;
a_metasingleconn_t *msc;
const char *save_text = NULL,
*save_matched = NULL;
BerVarray save_ref = NULL;
LDAPControl **save_ctrls = NULL;
void *matched_ctx = NULL;
char *matched = NULL;
char *text = NULL;
char **refs = NULL;
LDAPControl **ctrls = NULL;
Operation *op;
SlapReply *rs;
int rc;
mi = mc->mc_info;
mt = mi->mi_targets[ candidate ];
msc = &mc->mc_conns[ candidate ];
op = bc->op;
rs = &bc->rs;
save_text = rs->sr_text,
save_matched = rs->sr_matched;
save_ref = rs->sr_ref;
save_ctrls = rs->sr_ctrls;
rs->sr_text = NULL;
rs->sr_matched = NULL;
rs->sr_ref = NULL;
rs->sr_ctrls = NULL;
/* only touch when activity actually took place... */
if ( mi->mi_idle_timeout != 0 ) {
asyncmeta_set_msc_time(msc);
}
rc = ldap_parse_result( msc->msc_ldr, msg, &rs->sr_err,
&matched, &text, &refs, &ctrls, 0 );
if ( rc == LDAP_SUCCESS ) {
rs->sr_text = text;
} else {
rs->sr_err = rc;
}
rs->sr_err = slap_map_api2result( rs );
/* RFC 4511: referrals can only appear
* if result code is LDAP_REFERRAL */
if ( refs != NULL
&& refs[ 0 ] != NULL
&& refs[ 0 ][ 0 ] != '\0' )
{
if ( rs->sr_err != LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s asyncmeta_handle_common_result[%d]: "
"got referrals with err=%d\n",
op->o_log_prefix,
candidate, rs->sr_err );
} else {
int i;
for ( i = 0; refs[ i ] != NULL; i++ )
/* count */ ;
rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
op->o_tmpmemctx );
for ( i = 0; refs[ i ] != NULL; i++ ) {
ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
}
BER_BVZERO( &rs->sr_ref[ i ] );
}
} else if ( rs->sr_err == LDAP_REFERRAL ) {
Debug( LDAP_DEBUG_ANY,
"%s asyncmeta_handle_common_result[%d]: "
"got err=%d with null "
"or empty referrals\n",
op->o_log_prefix,
candidate, rs->sr_err );
rs->sr_err = LDAP_NO_SUCH_OBJECT;
}
if ( ctrls != NULL ) {
rs->sr_ctrls = ctrls;
}
/* if the error in the reply structure is not
* LDAP_SUCCESS, try to map it from client
* to server error */
if ( !LDAP_ERR_OK( rs->sr_err ) ) {
rs->sr_err = slap_map_api2result( rs );
/* internal ops ( op->o_conn == NULL )
* must not reply to client */
if ( op->o_conn && !op->o_do_not_cache && matched ) {
/* record the (massaged) matched
* DN into the reply structure */
rs->sr_matched = matched;
}
}
if ( META_BACK_TGT_QUARANTINE( mt ) ) {
asyncmeta_quarantine( op, mi, rs, candidate );
}
if ( matched != NULL ) {
struct berval dn, pdn;
ber_str2bv( matched, 0, 0, &dn );
if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
ldap_memfree( matched );
matched_ctx = op->o_tmpmemctx;
matched = pdn.bv_val;
}
rs->sr_matched = matched;
}
if ( rs->sr_err == LDAP_UNAVAILABLE || rs->sr_err == LDAP_SERVER_DOWN ) {
if ( rs->sr_text == NULL ) {
rs->sr_text = "Target is unavailable";
}
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
asyncmeta_drop_bc( mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
if ( op->o_conn ) {
asyncmeta_send_ldap_result(bc, op, rs);
}
if ( matched ) {
op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
}
if ( text ) {
ldap_memfree( text );
}
if ( rs->sr_ref ) {
op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
rs->sr_ref = NULL;
}
if ( refs ) {
ber_memvfree( (void **)refs );
}
if ( ctrls ) {
assert( rs->sr_ctrls != NULL );
ldap_controls_free( ctrls );
}
rs->sr_text = save_text;
rs->sr_matched = save_matched;
rs->sr_ref = save_ref;
rs->sr_ctrls = save_ctrls;
rc = (LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err);
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex );
asyncmeta_clear_bm_context(bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex );
return rc;
}
int
asyncmeta_back_search( Operation *op, SlapReply *rs )
{
a_metainfo_t *mi = ( a_metainfo_t * )op->o_bd->be_private;
struct timeval save_tv = { 0, 0 },
tv;
time_t stoptime = (time_t)(-1),
lastres_time = slap_get_time(),
timeout = 0;
int rc = 0, sres = LDAP_SUCCESS;
char *matched = NULL;
int last = 0, ncandidates = 0,
initial_candidates = 0, candidate_match = 0,
needbind = 0;
ldap_back_send_t sendok = LDAP_BACK_SENDERR;
long i,j;
int is_ok = 0;
void *savepriv;
SlapReply *candidates = NULL;
int do_taint = 0;
bm_context_t *bc;
a_metaconn_t *mc;
slap_callback *cb = op->o_callback;
rs_assert_ready( rs );
rs->sr_flags &= ~REP_ENTRY_MASK; /* paranoia, we can set rs = non-entry */
/*
* controls are set in ldap_back_dobind()
*
* FIXME: in case of values return filter, we might want
* to map attrs and maybe rewrite value
*/
asyncmeta_new_bm_context(op, rs, &bc, mi->mi_ntargets );
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, NULL, LDAP_BACK_DONTSEND, 0);
if ( !mc || rs->sr_err != LDAP_SUCCESS) {
op->o_callback = cb;
send_ldap_result(op, rs);
asyncmeta_clear_bm_context(bc);
return rs->sr_err;
}
/*
* Inits searches
*/
for ( i = 0; i < mi->mi_ntargets; i++ ) {
/* reset sr_msgid; it is used in most loops
* to check if that target is still to be considered */
candidates[i].sr_msgid = META_MSGID_UNDEFINED;
/* a target is marked as candidate by asyncmeta_getconn();
* if for any reason (an error, it's over or so) it is
* no longer active, sr_msgid is set to META_MSGID_IGNORE
* but it remains candidate, which means it has been active
* at some point during the operation. This allows to
* use its response code and more to compute the final
* response */
if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
continue;
}
candidates[ i ].sr_matched = NULL;
candidates[ i ].sr_text = NULL;
candidates[ i ].sr_ref = NULL;
candidates[ i ].sr_ctrls = NULL;
candidates[ i ].sr_nentries = 0;
candidates[ i ].sr_type = -1;
/* get largest timeout among candidates */
if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
&& mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
{
timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
}
}
bc->timeout = timeout;
bc->stoptime = op->o_time + bc->timeout;
if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
stoptime = op->o_time + op->ors_tlimit;
if (stoptime < bc->stoptime) {
bc->stoptime = stoptime;
bc->searchtime = 1;
bc->timeout = op->ors_tlimit;
}
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
rc = asyncmeta_add_message_queue(mc, bc);
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";
asyncmeta_clear_bm_context(bc);
op->o_callback = cb;
send_ldap_result(op, rs);
goto finish;
}
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( !META_IS_CANDIDATE( &candidates[ i ] )
|| candidates[ i ].sr_err != LDAP_SUCCESS )
{
continue;
}
rc = asyncmeta_dobind_init_with_retry(op, rs, bc, mc, i);
switch (rc)
{
case META_SEARCH_CANDIDATE:
/* target is already bound, just send the search request */
ncandidates++;
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_search: IS_CANDIDATE "
"cnd=\"%ld\"\n", op->o_log_prefix, i , 0);
rc = asyncmeta_back_search_start( op, rs, mc, bc, i, NULL, 0 );
if (rc == META_SEARCH_ERR) {
META_CANDIDATE_CLEAR(&candidates[i]);
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
if ( META_BACK_ONERR_STOP( mi ) ) {
asyncmeta_handle_onerr_stop(op,rs,mc,bc,i,cb);
goto finish;
}
else {
continue;
}
}
break;
case META_SEARCH_NOT_CANDIDATE:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_search: NOT_CANDIDATE "
"cnd=\"%ld\"\n", op->o_log_prefix, i , 0);
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
break;
case META_SEARCH_NEED_BIND:
case META_SEARCH_CONNECTING:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_search: NEED_BIND "
"cnd=\"%ld\" %p\n", op->o_log_prefix, i , &mc->mc_conns[i]);
ncandidates++;
rc = asyncmeta_dobind_init(op, rs, bc, mc, i);
if (rc == META_SEARCH_ERR) {
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
if ( META_BACK_ONERR_STOP( mi ) ) {
asyncmeta_handle_onerr_stop(op,rs,mc,bc,i,cb);
goto finish;
}
else {
continue;
}
}
break;
case META_SEARCH_BINDING:
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_search: BINDING "
"cnd=\"%ld\" %p\n", op->o_log_prefix, i , &mc->mc_conns[i]);
ncandidates++;
/* 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_search: SEARCH_ERR "
"cnd=\"%ldd\"\n", op->o_log_prefix, i , 0);
candidates[ i ].sr_msgid = META_MSGID_IGNORE;
candidates[ i ].sr_type = REP_RESULT;
if ( META_BACK_ONERR_STOP( mi ) ) {
asyncmeta_handle_onerr_stop(op,rs,mc,bc,i,cb);
goto finish;
}
else {
continue;
}
break;
default:
assert( 0 );
break;
}
}
initial_candidates = ncandidates;
if ( LogTest( LDAP_DEBUG_TRACE ) ) {
char cnd[ SLAP_TEXT_BUFLEN ];
int c;
for ( c = 0; c < mi->mi_ntargets; c++ ) {
if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
cnd[ c ] = '*';
} else {
cnd[ c ] = ' ';
}
}
cnd[ c ] = '\0';
Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_search: ncandidates=%d "
"cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
}
if ( initial_candidates == 0 ) {
/* NOTE: here we are not sending any matchedDN;
* this is intended, because if the back-meta
* is serving this search request, but no valid
* candidate could be looked up, it means that
* there is a hole in the mapping of the targets
* and thus no knowledge of any remote superior
* is available */
Debug( LDAP_DEBUG_ANY, "%s asyncmeta_back_search: "
"base=\"%s\" scope=%d: "
"no candidate could be selected\n",
op->o_log_prefix, op->o_req_dn.bv_val,
op->ors_scope );
/* FIXME: we're sending the first error we encounter;
* maybe we should pick the worst... */
rc = LDAP_NO_SUCH_OBJECT;
for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( META_IS_CANDIDATE( &candidates[ i ] )
&& candidates[ i ].sr_err != LDAP_SUCCESS )
{
rc = candidates[ i ].sr_err;
break;
}
}
rs->sr_err = rc;
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_drop_bc(mc, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
op->o_callback = cb;
send_ldap_result(op, rs);
asyncmeta_clear_bm_context(bc);
goto finish;
}
ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
asyncmeta_start_listeners(mc, candidates, bc);
ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
finish:
return rs->sr_err;
}