git.sur5r.net Git - openldap/blob - servers/slapd/back-asyncmeta/modify.c

   1 /* modify.c - modify request handler for back-asyncmeta */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2016-2018 The OpenLDAP Foundation.
   6  * Portions Copyright 2016 Symas Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was developed by Symas Corporation
  20  * based on back-meta module for inclusion in OpenLDAP Software.
  21  * This work was sponsored by Ericsson. */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/string.h>
  28 #include <ac/socket.h>
  29
  30 #include "slap.h"
  31 #include "../back-ldap/back-ldap.h"
  32 #include "back-asyncmeta.h"
  33 #include "../../../libraries/liblber/lber-int.h"
  34 #include "../../../libraries/libldap/ldap-int.h"
  35
  36 meta_search_candidate_t
  37 asyncmeta_back_modify_start(Operation *op,
  38                             SlapReply *rs,
  39                             a_metaconn_t *mc,
  40                             bm_context_t *bc,
  41                             int candidate)
  42 {
  43         int             i, isupdate, rc = 0, nretries = 1;
  44         a_dncookie      dc;
  45         a_metainfo_t    *mi = mc->mc_info;
  46         a_metatarget_t  *mt = mi->mi_targets[ candidate ];
  47         LDAPMod         **modv = NULL;
  48         LDAPMod         *mods = NULL;
  49         struct berval mdn;
  50         Modifications   *ml;
  51         struct berval   mapped;
  52         meta_search_candidate_t retcode = META_SEARCH_CANDIDATE;
  53                 BerElement *ber = NULL;
  54         a_metasingleconn_t      *msc = &mc->mc_conns[ candidate ];
  55         SlapReply               *candidates = bc->candidates;
  56         ber_int_t       msgid;
  57         LDAPControl             **ctrls = NULL;
  58
  59         /*
  60          * Rewrite the modify dn, if needed
  61          */
  62         dc.target = mt;
  63         dc.conn = op->o_conn;
  64         dc.rs = rs;
  65         dc.ctx = "modifyDN";
  66
  67         switch ( asyncmeta_dn_massage( &dc, &op->o_req_dn, &mdn ) )
  68         {
  69         case LDAP_SUCCESS:
  70                 break;
  71         case LDAP_UNWILLING_TO_PERFORM:
  72                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
  73                 rs->sr_text = "Operation not allowed";
  74                 retcode = META_SEARCH_ERR;
  75                 goto doreturn;
  76         default:
  77                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
  78                 retcode = META_SEARCH_NOT_CANDIDATE;
  79                 goto doreturn;
  80         }
  81
  82         for ( i = 0, ml = op->orm_modlist; ml; i++ ,ml = ml->sml_next )
  83                 ;
  84
  85         mods = ch_malloc( sizeof( LDAPMod )*i );
  86         if ( mods == NULL ) {
  87                 rs->sr_err = LDAP_OTHER;
  88                 retcode = META_SEARCH_ERR;
  89                 goto doreturn;
  90         }
  91         modv = ( LDAPMod ** )ch_malloc( ( i + 1 )*sizeof( LDAPMod * ) );
  92         if ( modv == NULL ) {
  93                 rs->sr_err = LDAP_OTHER;
  94                 retcode = META_SEARCH_ERR;
  95                 goto doreturn;
  96         }
  97
  98         dc.ctx = "modifyAttrDN";
  99         isupdate = be_shadow_update( op );
 100         for ( i = 0, ml = op->orm_modlist; ml; ml = ml->sml_next ) {
 101                 int     j, is_oc = 0;
 102
 103                 if ( !isupdate && !get_relax( op ) && ml->sml_desc->ad_type->sat_no_user_mod  )
 104                 {
 105                         continue;
 106                 }
 107
 108                 if ( ml->sml_desc == slap_schema.si_ad_objectClass
 109                                 || ml->sml_desc == slap_schema.si_ad_structuralObjectClass )
 110                 {
 111                         is_oc = 1;
 112                         mapped = ml->sml_desc->ad_cname;
 113
 114                 } else {
 115                         asyncmeta_map( &mt->mt_rwmap.rwm_at,
 116                                         &ml->sml_desc->ad_cname, &mapped,
 117                                         BACKLDAP_MAP );
 118                         if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 119                                 continue;
 120                         }
 121                 }
 122
 123                 modv[ i ] = &mods[ i ];
 124                 mods[ i ].mod_op = ml->sml_op | LDAP_MOD_BVALUES;
 125                 mods[ i ].mod_type = mapped.bv_val;
 126
 127                 /*
 128                  * FIXME: dn-valued attrs should be rewritten
 129                  * to allow their use in ACLs at the back-ldap
 130                  * level.
 131                  */
 132                 if ( ml->sml_values != NULL ) {
 133                         if ( is_oc ) {
 134                                 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ )
 135                                         ;
 136                                 mods[ i ].mod_bvalues =
 137                                         (struct berval **)ch_malloc( ( j + 1 ) *
 138                                         sizeof( struct berval * ) );
 139                                 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); ) {
 140                                         struct ldapmapping      *mapping;
 141
 142                                         asyncmeta_mapping( &mt->mt_rwmap.rwm_oc,
 143                                                         &ml->sml_values[ j ], &mapping, BACKLDAP_MAP );
 144
 145                                         if ( mapping == NULL ) {
 146                                                 if ( mt->mt_rwmap.rwm_oc.drop_missing ) {
 147                                                         continue;
 148                                                 }
 149                                                 mods[ i ].mod_bvalues[ j ] = &ml->sml_values[ j ];
 150
 151                                         } else {
 152                                                 mods[ i ].mod_bvalues[ j ] = &mapping->dst;
 153                                         }
 154                                         j++;
 155                                 }
 156                                 mods[ i ].mod_bvalues[ j ] = NULL;
 157
 158                         } else {
 159                                 if ( ml->sml_desc->ad_type->sat_syntax ==
 160                                                 slap_schema.si_syn_distinguishedName )
 161                                 {
 162                                         ( void )asyncmeta_dnattr_rewrite( &dc, ml->sml_values );
 163                                         if ( ml->sml_values == NULL ) {
 164                                                 continue;
 165                                         }
 166                                 }
 167
 168                                 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ )
 169                                         ;
 170                                 mods[ i ].mod_bvalues =
 171                                         (struct berval **)ch_malloc( ( j + 1 ) *
 172                                         sizeof( struct berval * ) );
 173                                 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ ) {
 174                                         mods[ i ].mod_bvalues[ j ] = &ml->sml_values[ j ];
 175                                 }
 176                                 mods[ i ].mod_bvalues[ j ] = NULL;
 177                         }
 178
 179                 } else {
 180                         mods[ i ].mod_bvalues = NULL;
 181                 }
 182
 183                 i++;
 184         }
 185         modv[ i ] = 0;
 186
 187 retry:;
 188         ctrls = op->o_ctrls;
 189         if ( asyncmeta_controls_add( op, rs, mc, candidate, &ctrls ) != LDAP_SUCCESS )
 190         {
 191                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 192                 retcode = META_SEARCH_ERR;
 193                 goto done;
 194         }
 195
 196         ber = ldap_build_modify_req( msc->msc_ld, mdn.bv_val, modv, ctrls, NULL, &msgid);
 197         if (ber) {
 198                 candidates[ candidate ].sr_msgid = msgid;
 199                 rc = ldap_send_initial_request( msc->msc_ld, LDAP_REQ_MODIFY,
 200                                                 mdn.bv_val, ber, msgid );
 201                 if (rc == msgid)
 202                         rc = LDAP_SUCCESS;
 203                 else
 204                         rc = LDAP_SERVER_DOWN;
 205
 206                 switch ( rc ) {
 207                 case LDAP_SUCCESS:
 208                         retcode = META_SEARCH_CANDIDATE;
 209                         asyncmeta_set_msc_time(msc);
 210                         break;
 211
 212                 case LDAP_SERVER_DOWN:
 213                         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 214                         asyncmeta_clear_one_msc(NULL, mc, candidate);
 215                         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 216                         if ( nretries && asyncmeta_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND ) ) {
 217                                 nretries = 0;
 218                                 /* if the identity changed, there might be need to re-authz */
 219                                 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 220                                 goto retry;
 221                         }
 222
 223                 default:
 224                         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 225                         retcode = META_SEARCH_ERR;
 226                 }
 227         }
 228
 229 done:
 230         (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 231
 232         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 233                 free( mdn.bv_val );
 234                 BER_BVZERO( &mdn );
 235         }
 236         if ( modv != NULL ) {
 237                 for ( i = 0; modv[ i ]; i++ ) {
 238                         free( modv[ i ]->mod_bvalues );
 239                 }
 240         }
 241         free( mods );
 242         free( modv );
 243
 244 doreturn:;
 245         Debug( LDAP_DEBUG_TRACE, "%s <<< asyncmeta_back_modify_start[%p]=%d\n", op->o_log_prefix, msc, candidates[candidate].sr_msgid );
 246         return retcode;
 247 }
 248
 249 int
 250 asyncmeta_back_modify( Operation *op, SlapReply *rs )
 251 {
 252         a_metainfo_t    *mi = ( a_metainfo_t * )op->o_bd->be_private;
 253         a_metatarget_t  *mt;
 254         a_metaconn_t    *mc;
 255         int             rc, candidate = -1;
 256         OperationBuffer opbuf;
 257         bm_context_t *bc;
 258         SlapReply *candidates;
 259         slap_callback *cb = op->o_callback;
 260
 261         Debug(LDAP_DEBUG_ARGS, "==> asyncmeta_back_modify: %s\n",
 262               op->o_req_dn.bv_val, 0, 0 );
 263
 264         asyncmeta_new_bm_context(op, rs, &bc, mi->mi_ntargets );
 265         if (bc == NULL) {
 266                 rs->sr_err = LDAP_OTHER;
 267                 asyncmeta_sender_error(op, rs, cb);
 268                 return rs->sr_err;
 269         }
 270
 271         candidates = bc->candidates;
 272         mc = asyncmeta_getconn( op, rs, candidates, &candidate, LDAP_BACK_DONTSEND, 0);
 273         if ( !mc || rs->sr_err != LDAP_SUCCESS) {
 274                 asyncmeta_sender_error(op, rs, cb);
 275                 asyncmeta_clear_bm_context(bc);
 276                 return rs->sr_err;
 277         }
 278
 279         mt = mi->mi_targets[ candidate ];
 280         bc->timeout = mt->mt_timeout[ SLAP_OP_MODIFY ];
 281         bc->retrying = LDAP_BACK_RETRYING;
 282         bc->sendok = ( LDAP_BACK_SENDRESULT | bc->retrying );
 283         bc->stoptime = op->o_time + bc->timeout;
 284
 285         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 286         rc = asyncmeta_add_message_queue(mc, bc);
 287         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 288
 289         if (rc != LDAP_SUCCESS) {
 290                 rs->sr_err = LDAP_BUSY;
 291                 rs->sr_text = "Maximum pending ops limit exceeded";
 292                 asyncmeta_clear_bm_context(bc);
 293                 asyncmeta_sender_error(op, rs, cb);
 294                 goto finish;
 295         }
 296
 297         rc = asyncmeta_dobind_init_with_retry(op, rs, bc, mc, candidate);
 298         switch (rc)
 299         {
 300         case META_SEARCH_CANDIDATE:
 301                 /* target is already bound, just send the request */
 302                 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify:  "
 303                        "cnd=\"%ld\"\n", op->o_log_prefix, candidate , 0);
 304
 305                 rc = asyncmeta_back_modify_start( op, rs, mc, bc, candidate);
 306                 if (rc == META_SEARCH_ERR) {
 307                         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 308                         asyncmeta_drop_bc(mc, bc);
 309                         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 310                         asyncmeta_sender_error(op, rs, cb);
 311                         asyncmeta_clear_bm_context(bc);
 312                         goto finish;
 313
 314                 }
 315                         break;
 316         case META_SEARCH_NOT_CANDIDATE:
 317                 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: NOT_CANDIDATE "
 318                        "cnd=\"%ld\"\n", op->o_log_prefix, candidate , 0);
 319                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 320                 ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 321                 asyncmeta_drop_bc(mc, bc);
 322                 ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 323                 asyncmeta_sender_error(op, rs, cb);
 324                 asyncmeta_clear_bm_context(bc);
 325                 goto finish;
 326
 327         case META_SEARCH_NEED_BIND:
 328         case META_SEARCH_CONNECTING:
 329                 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: NEED_BIND "
 330                        "cnd=\"%ld\" %p\n", op->o_log_prefix, candidate , &mc->mc_conns[candidate]);
 331                 rc = asyncmeta_dobind_init(op, rs, bc, mc, candidate);
 332                 if (rc == META_SEARCH_ERR) {
 333                         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 334                         asyncmeta_drop_bc(mc, bc);
 335                         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 336                         asyncmeta_sender_error(op, rs, cb);
 337                         asyncmeta_clear_bm_context(bc);
 338                         goto finish;
 339                 }
 340                 break;
 341         case META_SEARCH_BINDING:
 342                         Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: BINDING "
 343                                "cnd=\"%ld\" %p\n", op->o_log_prefix, candidate , &mc->mc_conns[candidate]);
 344                         /* Todo add the context to the message queue but do not send the request
 345                            the receiver must send this when we are done binding */
 346                         /* question - how would do receiver know to which targets??? */
 347                         break;
 348
 349         case META_SEARCH_ERR:
 350                         Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: ERR "
 351                                "cnd=\"%ldd\"\n", op->o_log_prefix, candidate , 0);
 352                         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 353                         candidates[ candidate ].sr_type = REP_RESULT;
 354                         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 355                         asyncmeta_drop_bc(mc, bc);
 356                         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 357                         asyncmeta_sender_error(op, rs, cb);
 358                         asyncmeta_clear_bm_context(bc);
 359                         goto finish;
 360                 default:
 361                         assert( 0 );
 362                         break;
 363                 }
 364         ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex);
 365         asyncmeta_start_one_listener(mc, candidates, bc, candidate);
 366         ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex);
 367 finish:
 368         return rs->sr_err;
 369 }