-/*
- * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
- *
- * Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
- *
- * This work has been developed to fulfill the requirements
- * of SysNet s.n.c. <http:www.sys-net.it> and it has been donated
- * to the OpenLDAP Foundation in the hope that it may be useful
- * to the Open Source community, but WITHOUT ANY WARRANTY.
- *
- * Permission is granted to anyone to use this software for any purpose
- * on any computer system, and to alter it and redistribute it, subject
- * to the following restrictions:
- *
- * 1. The author and SysNet s.n.c. are not responsible for the consequences
- * of use of this software, no matter how awful, even if they arise from
- * flaws in it.
- *
- * 2. The origin of this software must not be misrepresented, either by
- * explicit claim or by omission. Since few users ever read sources,
- * credits should appear in the documentation.
- *
- * 3. Altered versions must be plainly marked as such, and must not be
- * misrepresented as being the original software. Since few users
- * ever read sources, credits should appear in the documentation.
- * SysNet s.n.c. cannot be responsible for the consequences of the
- * alterations.
- *
- * 4. This notice may not be removed or altered.
- *
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * This software is based on the backend back-ldap, implemented
- * by Howard Chu <hyc@highlandsun.com>, and modified by Mark Valence
- * <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
- * contributors. The contribution of the original software to the present
- * implementation is acknowledged in this copyright statement.
+ * Copyright 1999-2005 The OpenLDAP Foundation.
+ * Portions Copyright 2001-2003 Pierangelo Masarati.
+ * Portions Copyright 1999-2003 Howard Chu.
+ * All rights reserved.
*
- * A special acknowledgement goes to Howard for the overall architecture
- * (and for borrowing large pieces of code), and to Mark, who implemented
- * from scratch the attribute/objectclass mapping.
- *
- * The original copyright statement follows.
- *
- * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
- *
- * Permission is granted to anyone to use this software for any purpose
- * on any computer system, and to alter it and redistribute it, subject
- * to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of this
- * software, no matter how awful, even if they arise from flaws in it.
- *
- * 2. The origin of this software must not be misrepresented, either by
- * explicit claim or by omission. Since few users ever read sources,
- * credits should appear in the documentation.
- *
- * 3. Altered versions must be plainly marked as such, and must not be
- * misrepresented as being the original software. Since few users
- * ever read sources, credits should appear in the
- * documentation.
- *
- * 4. This notice may not be removed or altered.
+ * 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 initially developed by the Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati.
*/
#include "portable.h"
#include <stdio.h>
+#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
int
meta_back_conn_cmp(
const void *c1,
- const void *c2
- )
+ const void *c2 )
{
- struct metaconn *lc1 = ( struct metaconn * )c1;
- struct metaconn *lc2 = ( struct metaconn * )c2;
+ metaconn_t *mc1 = ( metaconn_t * )c1;
+ metaconn_t *mc2 = ( metaconn_t * )c2;
- return ( ( lc1->conn < lc2->conn ) ? -1 :
- ( ( lc1->conn > lc2-> conn ) ? 1 : 0 ) );
+ return SLAP_PTRCMP( mc1->mc_conn, mc2->mc_conn );
}
/*
int
meta_back_conn_dup(
void *c1,
- void *c2
- )
+ void *c2 )
{
- struct metaconn *lc1 = ( struct metaconn * )c1;
- struct metaconn *lc2 = ( struct metaconn * )c2;
+ metaconn_t *mc1 = ( metaconn_t * )c1;
+ metaconn_t *mc2 = ( metaconn_t * )c2;
- return( ( lc1->conn == lc2->conn ) ? -1 : 0 );
+ return( ( mc1->mc_conn == mc2->mc_conn ) ? -1 : 0 );
}
/*
return;
}
- ravl_print( root->avl_right, depth+1 );
+ ravl_print( root->avl_right, depth + 1 );
for ( i = 0; i < depth; i++ ) {
printf( " " );
}
- printf( "c(%d) %d\n", ( ( struct metaconn * )root->avl_data )->conn->c_connid, root->avl_bf );
+ printf( "c(%d) %d\n", ( ( metaconn_t * )root->avl_data )->mc_conn->c_connid, root->avl_bf );
- ravl_print( root->avl_left, depth+1 );
+ ravl_print( root->avl_left, depth + 1 );
}
static void
*
* Allocates a connection structure, making room for all the referenced targets
*/
-static struct metaconn *
-metaconn_alloc( int ntargets )
+static metaconn_t *
+metaconn_alloc(
+ Operation *op )
{
- struct metaconn *lc;
- int i;
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ metaconn_t *mc;
+ int i, ntargets = mi->mi_ntargets;
assert( ntargets > 0 );
- lc = ch_calloc( sizeof( struct metaconn ), 1 );
- if ( lc == NULL ) {
- return NULL;
- }
-
- /*
- * make it a null-terminated array ...
- */
- lc->conns = ch_calloc( sizeof( struct metasingleconn * ), ntargets+1 );
- if ( lc->conns == NULL ) {
- free( lc );
+ /* malloc all in one */
+ mc = ( metaconn_t * )ch_malloc( sizeof( metaconn_t )
+ + sizeof( metasingleconn_t ) * ntargets );
+ if ( mc == NULL ) {
return NULL;
}
for ( i = 0; i < ntargets; i++ ) {
- lc->conns[ i ] =
- ch_calloc( sizeof( struct metasingleconn ), 1 );
- if ( lc->conns[ i ] == NULL ) {
- charray_free( ( char ** )lc->conns );
- free( lc->conns );
- free( lc );
- return NULL;
- }
+ mc->mc_conns[ i ].msc_ld = NULL;
+ BER_BVZERO( &mc->mc_conns[ i ].msc_bound_ndn );
+ BER_BVZERO( &mc->mc_conns[ i ].msc_cred );
+ mc->mc_conns[ i ].msc_bound = META_UNBOUND;
+ mc->mc_conns[ i ].msc_info = mi;
}
- lc->bound_target = META_BOUND_NONE;
+ mc->mc_auth_target = META_BOUND_NONE;
+ ldap_pvt_thread_mutex_init( &mc->mc_mutex );
+ mc->mc_refcnt = 1;
- return lc;
+ return mc;
}
/*
- * metaconn_free
+ * meta_back_conn_free
*
* clears a metaconn
*/
+
+void
+meta_back_conn_free(
+ metaconn_t *mc )
+{
+ assert( mc != NULL );
+ assert( mc->mc_refcnt == 0 );
+
+ ldap_pvt_thread_mutex_destroy( &mc->mc_mutex );
+ free( mc );
+}
+
static void
-metaconn_free(
- struct metaconn *lc
-)
+meta_back_freeconn(
+ Operation *op,
+ metaconn_t *mc )
{
- if ( !lc ) {
- return;
- }
-
- if ( lc->conns ) {
- int i;
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
- for ( i = 0; lc->conns[ i ] != NULL; ++i ) {
- free( lc->conns[ i ] );
- }
- charray_free( ( char ** )lc->conns );
+ assert( mc != NULL );
+
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+
+ if ( --mc->mc_refcnt == 0 ) {
+ meta_back_conn_free( mc );
}
- free( lc );
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
}
/*
- * init_one_conn
+ * meta_back_init_one_conn
*
* Initializes one connection
*/
-static int
-init_one_conn(
- Connection *conn,
- Operation *op,
- struct metatarget *lt,
- int vers,
- struct metasingleconn *lsc
- )
+int
+meta_back_init_one_conn(
+ Operation *op,
+ SlapReply *rs,
+ metatarget_t *mt,
+ metasingleconn_t *msc,
+ ldap_back_send_t sendok )
{
- int err;
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ int vers;
+ dncookie dc;
/*
* Already init'ed
*/
- if ( lsc->ld != NULL ) {
- return LDAP_SUCCESS;
+ if ( msc->msc_ld != NULL ) {
+ return rs->sr_err = LDAP_SUCCESS;
}
/*
* Attempts to initialize the connection to the target ds
*/
- err = ldap_initialize( &lsc->ld, lt->uri );
- if ( err != LDAP_SUCCESS ) {
- return ldap_back_map_result( err );
+ rs->sr_err = ldap_initialize( &msc->msc_ld, mt->mt_uri );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ goto error_return;
}
-
+
/*
* Set LDAP version. This will always succeed: If the client
* bound with a particular version, then so can we.
*/
- ldap_set_option( lsc->ld, LDAP_OPT_PROTOCOL_VERSION, &vers );
+ vers = op->o_conn->c_protocol;
+ ldap_set_option( msc->msc_ld, LDAP_OPT_PROTOCOL_VERSION, &vers );
+
+ /* automatically chase referrals ("chase-referrals"/"dont-chase-referrals" statement) */
+ if ( LDAP_BACK_CHASE_REFERRALS( mi ) ) {
+ ldap_set_option( msc->msc_ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON );
+ }
+
+#ifdef HAVE_TLS
+ /* start TLS ("tls [try-]{start|propagate}" statement) */
+ if ( ( LDAP_BACK_USE_TLS( mi ) || ( op->o_conn->c_is_tls && LDAP_BACK_PROPAGATE_TLS( mi ) ) )
+ && !ldap_is_ldaps_url( mt->mt_uri ) )
+ {
+#ifdef SLAP_STARTTLS_ASYNCHRONOUS
+ /*
+ * use asynchronous StartTLS; in case, chase referral
+ * FIXME: OpenLDAP does not return referral on StartTLS yet
+ */
+ int msgid;
+
+ rs->sr_err = ldap_start_tls( msc->msc_ld, NULL, NULL, &msgid );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ LDAPMessage *res = NULL;
+ int rc, nretries = mt->mt_nretries;
+ struct timeval tv = { 0, 0 };
+
+retry:;
+ rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
+ if ( rc < 0 ) {
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == 0 ) {
+ if ( nretries != 0 ) {
+ if ( nretries > 0 ) {
+ nretries--;
+ }
+ tv.tv_sec = 0;
+ tv.tv_usec = 100000;
+ goto retry;
+ }
+ rs->sr_err = LDAP_OTHER;
+
+ } else if ( rc == LDAP_RES_EXTENDED ) {
+ struct berval *data = NULL;
+
+ rs->sr_err = ldap_parse_extended_result( msc->msc_ld, res,
+ NULL, &data, 0 );
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ rs->sr_err = ldap_result2error( msc->msc_ld, res, 1 );
+ res = NULL;
+
+ /* FIXME: in case a referral
+ * is returned, should we try
+ * using it instead of the
+ * configured URI? */
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ ldap_install_tls( msc->msc_ld );
+
+ } else if ( rs->sr_err == LDAP_REFERRAL ) {
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "unwilling to chase referral returned by Start TLS exop";
+ }
+
+ if ( data ) {
+ if ( data->bv_val ) {
+ ber_memfree( data->bv_val );
+ }
+ ber_memfree( data );
+ }
+ }
+
+ } else {
+ rs->sr_err = LDAP_OTHER;
+ }
+
+ if ( res != NULL ) {
+ ldap_msgfree( res );
+ }
+ }
+#else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+ /*
+ * use synchronous StartTLS
+ */
+ rs->sr_err = ldap_start_tls_s( msc->msc_ld, NULL, NULL );
+#endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
+
+ /* if StartTLS is requested, only attempt it if the URL
+ * is not "ldaps://"; this may occur not only in case
+ * of misconfiguration, but also when used in the chain
+ * overlay, where the "uri" can be parsed out of a referral */
+ if ( rs->sr_err == LDAP_SERVER_DOWN
+ || ( rs->sr_err != LDAP_SUCCESS && LDAP_BACK_TLS_CRITICAL( mi ) ) )
+ {
+ ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
+ goto error_return;
+ }
+ }
+#endif /* HAVE_TLS */
/*
- * Sets a cookie for the rewrite session
+ * Set the network timeout if set
*/
- ( void )rewrite_session_init( lt->rwinfo, conn );
+ if ( mi->mi_network_timeout != 0 ) {
+ struct timeval network_timeout;
+
+ network_timeout.tv_usec = 0;
+ network_timeout.tv_sec = mi->mi_network_timeout;
+
+ ldap_set_option( msc->msc_ld, LDAP_OPT_NETWORK_TIMEOUT,
+ (void *)&network_timeout );
+ }
/*
- * If the connection dn is not null, an attempt to rewrite it is made
+ * If the connection DN is not null, an attempt to rewrite it is made
*/
- if ( conn->c_cdn != 0 ) {
+ if ( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
+ dc.target = mt;
+ dc.conn = op->o_conn;
+ dc.rs = rs;
+ dc.ctx = "bindDN";
/*
* Rewrite the bind dn if needed
*/
- lsc->bound_dn.bv_val = NULL;
- switch ( rewrite_session( lt->rwinfo, "bindDn",
- conn->c_cdn, conn,
- &lsc->bound_dn.bv_val ) ) {
- case REWRITE_REGEXEC_OK:
- if ( lsc->bound_dn.bv_val == NULL ) {
- ber_str2bv( conn->c_cdn, 0, 1, &lsc->bound_dn );
- }
-#ifdef NEW_LOGGING
- LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
- "[rw] bindDn: \"%s\" -> \"%s\"\n",
- conn->c_cdn, lsc->bound_dn.bv_val ));
-#else /* !NEW_LOGGING */
- Debug( LDAP_DEBUG_ARGS,
- "rw> bindDn: \"%s\" -> \"%s\"\n",
- conn->c_cdn, lsc->bound_dn.bv_val, 0 );
-#endif /* !NEW_LOGGING */
- break;
-
- case REWRITE_REGEXEC_UNWILLING:
- send_ldap_result( conn, op,
- LDAP_UNWILLING_TO_PERFORM,
- NULL, "Unwilling to perform",
- NULL, NULL );
- return LDAP_UNWILLING_TO_PERFORM;
-
- case REWRITE_REGEXEC_ERR:
- send_ldap_result( conn, op,
- LDAP_OPERATIONS_ERROR,
- NULL, "Operations error",
- NULL, NULL );
- return LDAP_OPERATIONS_ERROR;
+ if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn,
+ &msc->msc_bound_ndn ) )
+ {
+ goto error_return;
}
- assert( lsc->bound_dn.bv_val );
+ /* copy the DN idf needed */
+ if ( msc->msc_bound_ndn.bv_val == op->o_conn->c_dn.bv_val ) {
+ ber_dupbv( &msc->msc_bound_ndn, &op->o_conn->c_dn );
+ }
+
+ assert( !BER_BVISNULL( &msc->msc_bound_ndn ) );
} else {
- ber_str2bv( "", 0, 1, &lsc->bound_dn );
+ ber_str2bv( "", 0, 1, &msc->msc_bound_ndn );
+ }
+
+ msc->msc_bound = META_UNBOUND;
+
+error_return:;
+ if ( rs->sr_err == LDAP_SUCCESS ) {
+ /*
+ * Sets a cookie for the rewrite session
+ */
+ ( void )rewrite_session_init( mt->mt_rwmap.rwm_rw, op->o_conn );
+
+ } else {
+ rs->sr_err = slap_map_api2result( rs );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ }
+ }
+
+ return rs->sr_err;
+}
+
+/*
+ * meta_back_retry
+ *
+ * Retries one connection
+ */
+int
+meta_back_retry(
+ Operation *op,
+ SlapReply *rs,
+ metaconn_t *mc,
+ int candidate,
+ ldap_back_send_t sendok )
+{
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ metatarget_t *mt = &mi->mi_targets[ candidate ];
+ int rc = LDAP_UNAVAILABLE;
+ metasingleconn_t *msc = &mc->mc_conns[ candidate ];
+
+retry_lock:;
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+
+ assert( mc->mc_refcnt > 0 );
+
+ if ( mc->mc_refcnt == 1 ) {
+ while ( ldap_pvt_thread_mutex_trylock( &mc->mc_mutex ) ) {
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
+ ldap_pvt_thread_yield();
+ goto retry_lock;
+ }
+
+ ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
+ msc->msc_ld = NULL;
+ msc->msc_bound = 0;
+
+ ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
+
+ /* mc here must be the regular mc, reset and ready for init */
+ rc = meta_back_init_one_conn( op, rs, mt, msc, sendok );
+
+ if ( rc == LDAP_SUCCESS ) {
+ rc = meta_back_single_dobind( op, rs, mc, candidate,
+ sendok, mt->mt_nretries, 0 );
+ }
+
+ ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
+ }
+
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
+
+ return rc == LDAP_SUCCESS ? 1 : 0;
+}
+
+/*
+ * callback for unique candidate selection
+ */
+static int
+meta_back_conn_cb( Operation *op, SlapReply *rs )
+{
+ assert( op->o_tag == LDAP_REQ_SEARCH );
+
+ switch ( rs->sr_type ) {
+ case REP_SEARCH:
+ ((int *)op->o_callback->sc_private)[0] = (int)op->o_private;
+ break;
+
+ case REP_SEARCHREF:
+ case REP_RESULT:
+ break;
+
+ default:
+ return rs->sr_err;
}
- lsc->bound = META_UNBOUND;
+ return 0;
+}
+
+
+static int
+meta_back_get_candidate(
+ Operation *op,
+ SlapReply *rs,
+ struct berval *ndn )
+{
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ int candidate;
+
+ /*
+ * tries to get a unique candidate
+ * (takes care of default target)
+ */
+ candidate = meta_back_select_unique_candidate( mi, ndn );
/*
- * The candidate is activated
+ * if any is found, inits the connection
*/
- lsc->candidate = META_CANDIDATE;
- return LDAP_SUCCESS;
+ if ( candidate == META_TARGET_NONE ) {
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ rs->sr_text = "no suitable candidate target found";
+
+ } else if ( candidate == META_TARGET_MULTIPLE ) {
+ Filter f = { 0 };
+ Operation op2 = *op;
+ SlapReply rs2 = { 0 };
+ slap_callback cb2 = { 0 };
+ int rc;
+
+ /* try to get a unique match for the request ndn
+ * among the multiple candidates available */
+ op2.o_tag = LDAP_REQ_SEARCH;
+ op2.o_req_dn = *ndn;
+ op2.o_req_ndn = *ndn;
+ op2.ors_scope = LDAP_SCOPE_BASE;
+ op2.ors_deref = LDAP_DEREF_NEVER;
+ op2.ors_attrs = slap_anlist_no_attrs;
+ op2.ors_attrsonly = 0;
+ op2.ors_limit = NULL;
+ op2.ors_slimit = 1;
+ op2.ors_tlimit = SLAP_NO_LIMIT;
+
+ f.f_choice = LDAP_FILTER_PRESENT;
+ f.f_desc = slap_schema.si_ad_objectClass;
+ op2.ors_filter = &f;
+ BER_BVSTR( &op2.ors_filterstr, "(objectClass=*)" );
+
+ op2.o_callback = &cb2;
+ cb2.sc_response = meta_back_conn_cb;
+ cb2.sc_private = (void *)&candidate;
+
+ rc = op->o_bd->be_search( &op2, &rs2 );
+
+ switch ( rs2.sr_err ) {
+ case LDAP_SUCCESS:
+ default:
+ rs->sr_err = rs2.sr_err;
+ break;
+
+ case LDAP_SIZELIMIT_EXCEEDED:
+ /* if multiple candidates can serve the operation,
+ * and a default target is defined, and it is
+ * a candidate, try using it (FIXME: YMMV) */
+ if ( mi->mi_defaulttarget != META_DEFAULT_TARGET_NONE
+ && meta_back_is_candidate( &mi->mi_targets[ mi->mi_defaulttarget ].mt_nsuffix,
+ mi->mi_targets[ mi->mi_defaulttarget ].mt_scope,
+ ndn, op->o_tag == LDAP_REQ_SEARCH ? op->ors_scope : LDAP_SCOPE_BASE ) )
+ {
+ candidate = mi->mi_defaulttarget;
+ rs->sr_err = LDAP_SUCCESS;
+ rs->sr_text = NULL;
+
+ } else {
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "cannot select unique candidate target";
+ }
+ break;
+ }
+
+ } else {
+ rs->sr_err = LDAP_SUCCESS;
+ }
+
+ return candidate;
+}
+
+static void *meta_back_candidates_dummy;
+
+static void
+meta_back_candidates_keyfree(
+ void *key,
+ void *data )
+{
+ metacandidates_t *mc = (metacandidates_t *)data;
+
+ ber_memfree_x( mc->mc_candidates, NULL );
+ ber_memfree_x( data, NULL );
+}
+
+SlapReply *
+meta_back_candidates_get( Operation *op )
+{
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ metacandidates_t *mc;
+
+ if ( op->o_threadctx ) {
+ void *data = NULL;
+
+ ldap_pvt_thread_pool_getkey( op->o_threadctx,
+ &meta_back_candidates_dummy, &data, NULL );
+ mc = (metacandidates_t *)data;
+
+ } else {
+ mc = mi->mi_candidates;
+ }
+
+ if ( mc == NULL ) {
+ mc = ch_calloc( sizeof( metacandidates_t ), 1 );
+ mc->mc_ntargets = mi->mi_ntargets;
+ mc->mc_candidates = ch_calloc( sizeof( SlapReply ), mc->mc_ntargets );
+ if ( op->o_threadctx ) {
+ void *data = NULL;
+
+ data = (void *)mc;
+ ldap_pvt_thread_pool_setkey( op->o_threadctx,
+ &meta_back_candidates_dummy, data,
+ meta_back_candidates_keyfree );
+
+ } else {
+ mi->mi_candidates = mc;
+ }
+
+ } else if ( mc->mc_ntargets < mi->mi_ntargets ) {
+ /* NOTE: in the future, may want to allow back-config
+ * to add/remove targets from back-meta... */
+ mc->mc_ntargets = mi->mi_ntargets;
+ mc->mc_candidates = ch_realloc( mc->mc_candidates,
+ sizeof( SlapReply ) * mc->mc_ntargets );
+ }
+
+ return mc->mc_candidates;
}
/*
*
* Prepares the connection structure
*
- * FIXME: This function needs to receive some info on the type of operation
- * it is invoked by, so that only the correct pool of candidate targets
- * is initialized in case no connection was available yet.
- *
- * At present a flag that says whether the candidate target must be unique
- * is passed; eventually an operation agent will be used.
+ * RATIONALE:
+ *
+ * - determine what DN is being requested:
+ *
+ * op requires candidate checks
+ *
+ * add unique parent of o_req_ndn
+ * bind unique^*[/all] o_req_ndn [no check]
+ * compare unique^+ o_req_ndn
+ * delete unique o_req_ndn
+ * modify unique o_req_ndn
+ * search any o_req_ndn
+ * modrdn unique[, unique] o_req_ndn[, orr_nnewSup]
+ *
+ * - for ops that require the candidate to be unique, in case of multiple
+ * occurrences an internal search with sizeLimit=1 is performed
+ * if a unique candidate can actually be determined. If none is found,
+ * the operation aborts; if multiple are found, the default target
+ * is used if defined and candidate; otherwise the operation aborts.
+ *
+ * *^note: actually, the bind operation is handled much like a search;
+ * i.e. the bind is broadcast to all candidate targets.
+ *
+ * +^note: actually, the compare operation is handled much like a search;
+ * i.e. the compare is broadcast to all candidate targets, while checking
+ * that exactly none (noSuchObject) or one (TRUE/FALSE/UNDEFINED) is
+ * returned.
*/
-struct metaconn *
+metaconn_t *
meta_back_getconn(
- struct metainfo *li,
- Connection *conn,
- Operation *op,
- int op_type,
- struct berval *ndn,
- int *candidate )
+ Operation *op,
+ SlapReply *rs,
+ int *candidate,
+ ldap_back_send_t sendok )
{
- struct metaconn *lc, lc_curr;
- int vers, cached = -1, i = -1, err = LDAP_SUCCESS;
- int new_conn = 0;
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+ metaconn_t *mc = NULL,
+ mc_curr = { 0 };
+ int cached = META_TARGET_NONE,
+ i = META_TARGET_NONE,
+ err = LDAP_SUCCESS,
+ new_conn = 0,
+ ncandidates = 0;
+
+
+ meta_op_type op_type = META_OP_REQUIRE_SINGLE;
+ int parent = 0,
+ newparent = 0;
+ struct berval ndn = op->o_req_ndn,
+ pndn;
+
+ SlapReply *candidates = meta_back_candidates_get( op );
/* Searches for a metaconn in the avl tree */
- lc_curr.conn = conn;
- ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- lc = (struct metaconn *)avl_find( li->conntree,
- (caddr_t)&lc_curr, meta_back_conn_cmp );
- ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
-
- /* Looks like we didn't get a bind. Open a new session... */
- if ( !lc ) {
- lc = metaconn_alloc( li->ntargets );
- lc->conn = conn;
- new_conn = 1;
+ mc_curr.mc_conn = op->o_conn;
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+ mc = (metaconn_t *)avl_find( mi->mi_conntree,
+ (caddr_t)&mc_curr, meta_back_conn_cmp );
+ if ( mc ) {
+ mc->mc_refcnt++;
}
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
+
+ switch ( op->o_tag ) {
+ case LDAP_REQ_ADD:
+ /* if we go to selection, the entry must not exist,
+ * and we must be able to resolve the parent */
+ parent = 1;
+ dnParent( &ndn, &pndn );
+ break;
+
+ case LDAP_REQ_MODRDN:
+ /* if nnewSuperior is not NULL, it must resolve
+ * to the same candidate as the req_ndn */
+ if ( op->orr_nnewSup ) {
+ newparent = 1;
+ }
+ break;
- vers = conn->c_protocol;
+ case LDAP_REQ_BIND:
+ /* if bound as rootdn, the backend must bind to all targets
+ * with the administrative identity */
+ if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
+ op_type = META_OP_REQUIRE_ALL;
+ }
+ break;
+
+ case LDAP_REQ_DELETE:
+ case LDAP_REQ_MODIFY:
+ /* just a unique candidate */
+ break;
+
+ case LDAP_REQ_COMPARE:
+ case LDAP_REQ_SEARCH:
+ /* allow multiple candidates for the searchBase */
+ op_type = META_OP_ALLOW_MULTIPLE;
+ break;
+
+ default:
+ /* right now, just break (exop?) */
+ break;
+ }
+ /*
+ * require all connections ...
+ */
+ if ( op_type == META_OP_REQUIRE_ALL ) {
+
+ /* Looks like we didn't get a bind. Open a new session... */
+ if ( mc == NULL ) {
+ mc = metaconn_alloc( op );
+ mc->mc_conn = op->o_conn;
+ new_conn = 1;
+ }
+
+ for ( i = 0; i < mi->mi_ntargets; i++ ) {
+
+ /*
+ * The target is activated; if needed, it is
+ * also init'd
+ */
+ candidates[ i ].sr_err =
+ meta_back_init_one_conn( op, rs,
+ &mi->mi_targets[ i ],
+ &mc->mc_conns[ i ], sendok );
+ if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
+ candidates[ i ].sr_tag = META_CANDIDATE;
+ ncandidates++;
+
+ } else {
+
+ /*
+ * FIXME: in case one target cannot
+ * be init'd, should the other ones
+ * be tried?
+ */
+ candidates[ i ].sr_tag = META_NOT_CANDIDATE;
+ err = candidates[ i ].sr_err;
+ continue;
+ }
+ }
+
+ if ( ncandidates == 0 ) {
+ if ( new_conn ) {
+ meta_back_freeconn( op, mc );
+
+ } else {
+ meta_back_release_conn( op, mc );
+ }
+
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ rs->sr_text = "Unable to select valid candidates";
+
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
+ rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
+ }
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ rs->sr_matched = NULL;
+ }
+
+ return NULL;
+ }
+
+ goto done;
+ }
+
/*
* looks in cache, if any
*/
- if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
- cached = i = meta_dncache_get_target( &li->cache, ndn );
+ if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
+ cached = i = meta_dncache_get_target( &mi->mi_cache, &op->o_req_ndn );
}
if ( op_type == META_OP_REQUIRE_SINGLE ) {
+ int j;
+
+ for ( j = 0; j < mi->mi_ntargets; j++ ) {
+ candidates[ j ].sr_tag = META_NOT_CANDIDATE;
+ }
/*
* tries to get a unique candidate
- * (takes care of default target
+ * (takes care of default target)
*/
- if ( i < 0 ) {
- i = meta_back_select_unique_candidate( li, ndn );
+ if ( i == META_TARGET_NONE ) {
+ i = meta_back_get_candidate( op, rs, &ndn );
+
+ if ( rs->sr_err == LDAP_NO_SUCH_OBJECT && parent ) {
+ i = meta_back_get_candidate( op, rs, &pndn );
+ }
+
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ if ( mc != NULL ) {
+ meta_back_release_conn( op, mc );
+ }
+
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
+ rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
+ }
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ rs->sr_matched = NULL;
+ }
+
+ return NULL;
+ }
}
- /*
- * if any is found, inits the connection
- */
- if ( i < 0 ) {
- if ( new_conn ) {
- metaconn_free( lc );
+ if ( newparent && meta_back_get_candidate( op, rs, op->orr_nnewSup ) != i )
+ {
+ if ( mc != NULL ) {
+ meta_back_release_conn( op, mc );
}
- send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT,
- NULL, "", NULL, NULL );
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "cross-target rename not supported";
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ }
return NULL;
}
-
-#ifdef NEW_LOGGING
- LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
- "meta_back_getconn: got target %d"
- " for ndn=\"%s\" from cache\n",
- i, ndn->bv_val ));
-#else /* !NEW_LOGGING */
- Debug( LDAP_DEBUG_CACHE,
- "==>meta_back_getconn: got target %d for ndn=\"%s\" from cache\n%s",
- i, ndn->bv_val, "" );
-#endif /* !NEW_LOGGING */
+
+ Debug( LDAP_DEBUG_TRACE,
+ "==>meta_back_getconn: got target %d for ndn=\"%s\" from cache\n",
+ i, op->o_req_ndn.bv_val, 0 );
+
+ if ( mc == NULL ) {
+ /* Retries searching for a metaconn in the avl tree
+ * the reason is that the connection might have been
+ * created by meta_back_get_candidate() */
+ mc_curr.mc_conn = op->o_conn;
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+ mc = (metaconn_t *)avl_find( mi->mi_conntree,
+ (caddr_t)&mc_curr, meta_back_conn_cmp );
+ if ( mc != NULL ) {
+ mc->mc_refcnt++;
+ }
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
+
+ /* Looks like we didn't get a bind. Open a new session... */
+ if ( mc == NULL ) {
+ mc = metaconn_alloc( op );
+ mc->mc_conn = op->o_conn;
+ new_conn = 1;
+ }
+ }
/*
* Clear all other candidates
*/
- ( void )meta_clear_unused_candidates( li, lc, i, 0 );
+ ( void )meta_clear_unused_candidates( op, i );
/*
* The target is activated; if needed, it is
- * also init'd. In case of error, init_one_conn
+ * also init'd. In case of error, meta_back_init_one_conn
* sends the appropriate result.
*/
- err = init_one_conn( conn, op, li->targets[ i ],
- vers, lc->conns[ i ] );
+ err = meta_back_init_one_conn( op, rs, &mi->mi_targets[ i ],
+ &mc->mc_conns[ i ], sendok );
if ( err != LDAP_SUCCESS ) {
-
/*
* FIXME: in case one target cannot
* be init'd, should the other ones
* be tried?
*/
- ( void )meta_clear_one_candidate( lc->conns[ i ], 1 );
- if ( new_conn ) {
- metaconn_free( lc );
+ candidates[ i ].sr_tag = META_NOT_CANDIDATE;
+ if ( new_conn ) {
+ (void)meta_clear_one_candidate( &mc->mc_conns[ i ] );
+ meta_back_freeconn( op, mc );
+
+ } else {
+ meta_back_release_conn( op, mc );
}
return NULL;
}
+ candidates[ i ].sr_err = LDAP_SUCCESS;
+ candidates[ i ].sr_tag = META_CANDIDATE;
+ ncandidates++;
+
if ( candidate ) {
*candidate = i;
}
/*
- * require all connections ...
+ * if no unique candidate ...
*/
- } else if (op_type == META_OP_REQUIRE_ALL) {
- for ( i = 0; i < li->ntargets; i++ ) {
+ } else {
- /*
- * The target is activated; if needed, it is
- * also init'd
- */
- int lerr = init_one_conn( conn, op, li->targets[ i ],
- vers, lc->conns[ i ] );
- if ( lerr != LDAP_SUCCESS ) {
-
- /*
- * FIXME: in case one target cannot
- * be init'd, should the other ones
- * be tried?
- */
- ( void )meta_clear_one_candidate( lc->conns[ i ], 1 );
- err = lerr;
- continue;
- }
+ /* Looks like we didn't get a bind. Open a new session... */
+ if ( mc == NULL ) {
+ mc = metaconn_alloc( op );
+ mc->mc_conn = op->o_conn;
+ new_conn = 1;
}
- /*
- * if no unique candidate ...
- */
- } else {
- for ( i = 0; i < li->ntargets; i++ ) {
+ for ( i = 0; i < mi->mi_ntargets; i++ ) {
if ( i == cached
- || meta_back_is_candidate( &li->targets[ i ]->suffix, ndn ) ) {
+ || meta_back_is_candidate( &mi->mi_targets[ i ].mt_nsuffix,
+ mi->mi_targets[ i ].mt_scope,
+ &op->o_req_ndn, LDAP_SCOPE_SUBTREE ) )
+ {
/*
* The target is activated; if needed, it is
* also init'd
*/
- int lerr = init_one_conn( conn, op,
- li->targets[ i ],
- vers, lc->conns[ i ] );
- if ( lerr != LDAP_SUCCESS ) {
+ int lerr = meta_back_init_one_conn( op, rs,
+ &mi->mi_targets[ i ],
+ &mc->mc_conns[ i ], sendok );
+ if ( lerr == LDAP_SUCCESS ) {
+ candidates[ i ].sr_tag = META_CANDIDATE;
+ candidates[ i ].sr_err = LDAP_SUCCESS;
+ ncandidates++;
+
+ Debug( LDAP_DEBUG_TRACE, "%s: meta_back_init_one_conn(%d)\n",
+ op->o_log_prefix, i, 0 );
+
+ } else {
/*
* FIXME: in case one target cannot
* be init'd, should the other ones
* be tried?
*/
- ( void )meta_clear_one_candidate( lc->conns[ i ], 1 );
+ if ( new_conn ) {
+ ( void )meta_clear_one_candidate( &mc->mc_conns[ i ] );
+ }
+ /* leave the target candidate, but record the error for later use */
+ candidates[ i ].sr_err = lerr;
err = lerr;
+
+ Debug( LDAP_DEBUG_ANY, "%s: meta_back_init_one_conn(%d) failed: %d\n",
+ op->o_log_prefix, i, lerr );
+
continue;
}
+
+ } else {
+ if ( new_conn ) {
+ ( void )meta_clear_one_candidate( &mc->mc_conns[ i ] );
+ }
+ candidates[ i ].sr_tag = META_NOT_CANDIDATE;
}
}
+
+ if ( ncandidates == 0 ) {
+ if ( new_conn ) {
+ meta_back_freeconn( op, mc );
+
+ } else {
+ meta_back_release_conn( op, mc );
+ }
+
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ rs->sr_text = "Unable to select valid candidates";
+
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
+ rs->sr_matched = op->o_bd->be_suffix[ 0 ].bv_val;
+ }
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ rs->sr_matched = NULL;
+ }
+
+ return NULL;
+ }
}
+done:;
+ /* clear out meta_back_init_one_conn non-fatal errors */
+ rs->sr_err = LDAP_SUCCESS;
+ rs->sr_text = NULL;
+
if ( new_conn ) {
/*
* Inserts the newly created metaconn in the avl tree
*/
- ldap_pvt_thread_mutex_lock( &li->conn_mutex );
- err = avl_insert( &li->conntree, ( caddr_t )lc,
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+ err = avl_insert( &mi->mi_conntree, ( caddr_t )mc,
meta_back_conn_cmp, meta_back_conn_dup );
#if PRINT_CONNTREE > 0
- myprint( li->conntree );
+ myprint( mi->mi_conntree );
#endif /* PRINT_CONNTREE */
- ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
-#ifdef NEW_LOGGING
- LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
- "meta_back_getconn: conn %ld inserted\n",
- lc->conn->c_connid ));
-#else /* !NEW_LOGGING */
- Debug( LDAP_DEBUG_TRACE,
- "=>meta_back_getconn: conn %ld inserted\n%s%s",
- lc->conn->c_connid, "", "" );
-#endif /* !NEW_LOGGING */
-
/*
* Err could be -1 in case a duplicate metaconn is inserted
+ *
+ * FIXME: what if the same client issues more than one
+ * asynchronous operations?
*/
if ( err != 0 ) {
- send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
- NULL, "Internal server error", NULL, NULL );
- metaconn_free( lc );
+ Debug( LDAP_DEBUG_ANY,
+ "%s meta_back_getconn: candidates=%d conn=%ld insert failed\n",
+ op->o_log_prefix, ncandidates, mc->mc_conn->c_connid );
+
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "Internal server error";
+ meta_back_freeconn( op, mc );
+ if ( sendok & LDAP_BACK_SENDERR ) {
+ send_ldap_result( op, rs );
+ rs->sr_text = NULL;
+ }
return NULL;
}
+
+ Debug( LDAP_DEBUG_TRACE,
+ "%s meta_back_getconn: candidates=%d conn=%ld inserted\n",
+ op->o_log_prefix, ncandidates, mc->mc_conn->c_connid );
+
} else {
-#ifdef NEW_LOGGING
- LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
- "meta_back_getconn: conn %ld fetched\n",
- lc->conn->c_connid ));
-#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_TRACE,
- "=>meta_back_getconn: conn %ld fetched\n%s%s",
- lc->conn->c_connid, "", "" );
-#endif /* !NEW_LOGGING */
+ "%s meta_back_getconn: candidates=%d conn=%ld fetched\n",
+ op->o_log_prefix, ncandidates, mc->mc_conn->c_connid );
}
- return lc;
+ return mc;
}
+void
+meta_back_release_conn(
+ Operation *op,
+ metaconn_t *mc )
+{
+ metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
+
+ assert( mc != NULL );
+
+ ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
+ assert( mc->mc_refcnt > 0 );
+ mc->mc_refcnt--;
+ ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
+}
projects / openldap / blobdiff