modify.c revision 1.2
1 /* $NetBSD: modify.c,v 1.2 2021/08/14 16:14:59 christos Exp $ */ 2 3 /* modify.c - modify request handler for back-asyncmeta */ 4 /* $OpenLDAP$ */ 5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 6 * 7 * Copyright 2016-2021 The OpenLDAP Foundation. 8 * Portions Copyright 2016 Symas Corporation. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted only as authorized by the OpenLDAP 13 * Public License. 14 * 15 * A copy of this license is available in the file LICENSE in the 16 * top-level directory of the distribution or, alternatively, at 17 * <http://www.OpenLDAP.org/license.html>. 18 */ 19 20 /* ACKNOWLEDGEMENTS: 21 * This work was developed by Symas Corporation 22 * based on back-meta module for inclusion in OpenLDAP Software. 23 * This work was sponsored by Ericsson. */ 24 25 #include <sys/cdefs.h> 26 __RCSID("$NetBSD: modify.c,v 1.2 2021/08/14 16:14:59 christos Exp $"); 27 28 #include "portable.h" 29 30 #include <stdio.h> 31 32 #include <ac/string.h> 33 #include <ac/socket.h> 34 #include "slap.h" 35 #include "../../../libraries/liblber/lber-int.h" 36 #include "../../../libraries/libldap/ldap-int.h" 37 #include "../back-ldap/back-ldap.h" 38 #include "back-asyncmeta.h" 39 40 meta_search_candidate_t 41 asyncmeta_back_modify_start(Operation *op, 42 SlapReply *rs, 43 a_metaconn_t *mc, 44 bm_context_t *bc, 45 int candidate, 46 int do_lock) 47 { 48 int i, isupdate, rc = 0; 49 a_dncookie dc; 50 a_metainfo_t *mi = mc->mc_info; 51 a_metatarget_t *mt = mi->mi_targets[ candidate ]; 52 LDAPMod **modv = NULL; 53 LDAPMod *mods = NULL; 54 struct berval mdn; 55 Modifications *ml; 56 meta_search_candidate_t retcode = META_SEARCH_CANDIDATE; 57 BerElement *ber = NULL; 58 a_metasingleconn_t *msc = &mc->mc_conns[ candidate ]; 59 SlapReply *candidates = bc->candidates; 60 ber_int_t msgid; 61 LDAPControl **ctrls = NULL; 62 63 /* 64 * Rewrite the modify dn, if needed 65 */ 66 dc.op = op; 67 dc.target = mt; 68 dc.memctx = op->o_tmpmemctx; 69 dc.to_from = MASSAGE_REQ; 70 71 asyncmeta_dn_massage( &dc, &op->o_req_dn, &mdn ); 72 73 for ( i = 0, ml = op->orm_modlist; ml; i++ ,ml = ml->sml_next ) 74 ; 75 if (i > 0) { 76 mods = op->o_tmpalloc( sizeof( LDAPMod )*i, op->o_tmpmemctx ); 77 } 78 79 if ( mods == NULL ) { 80 rs->sr_err = LDAP_OTHER; 81 retcode = META_SEARCH_ERR; 82 goto doreturn; 83 } 84 modv = ( LDAPMod ** )op->o_tmpalloc( ( i + 1 )*sizeof( LDAPMod * ), op->o_tmpmemctx ); 85 if ( modv == NULL ) { 86 rs->sr_err = LDAP_OTHER; 87 retcode = META_SEARCH_ERR; 88 goto doreturn; 89 } 90 91 isupdate = be_shadow_update( op ); 92 for ( i = 0, ml = op->orm_modlist; ml; ml = ml->sml_next ) { 93 int j; 94 95 if ( !isupdate && !get_relax( op ) && ml->sml_desc->ad_type->sat_no_user_mod ) 96 { 97 continue; 98 } 99 100 modv[ i ] = &mods[ i ]; 101 mods[ i ].mod_op = ml->sml_op | LDAP_MOD_BVALUES; 102 mods[ i ].mod_type = ml->sml_desc->ad_cname.bv_val; 103 104 if ( ml->sml_values != NULL ) { 105 j = ml->sml_numvals; 106 mods[ i ].mod_bvalues =(struct berval **)op->o_tmpalloc( ( j + 1 ) *sizeof( struct berval * ), op->o_tmpmemctx ); 107 for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ ) { 108 mods[ i ].mod_bvalues[ j ] = op->o_tmpalloc(sizeof( struct berval ), op->o_tmpmemctx ); 109 if ( ml->sml_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) 110 asyncmeta_dn_massage( &dc, &ml->sml_values[ j ], mods[ i ].mod_bvalues[ j ] ); 111 else 112 *mods[ i ].mod_bvalues[ j ] = ml->sml_values[ j ]; 113 } 114 mods[ i ].mod_bvalues[ j ] = NULL; 115 116 } else { 117 mods[ i ].mod_bvalues = NULL; 118 } 119 120 i++; 121 } 122 modv[ i ] = 0; 123 124 asyncmeta_set_msc_time(msc); 125 ctrls = op->o_ctrls; 126 if ( asyncmeta_controls_add( op, rs, mc, candidate, bc->is_root, &ctrls) != LDAP_SUCCESS ) 127 { 128 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE; 129 retcode = META_SEARCH_ERR; 130 goto done; 131 } 132 133 /* someone reset the connection */ 134 if (!( LDAP_BACK_CONN_ISBOUND( msc ) 135 || LDAP_BACK_CONN_ISANON( msc )) || msc->msc_ld == NULL ) { 136 Debug( asyncmeta_debug , "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ ); 137 goto error_unavailable; 138 } 139 140 ber = ldap_build_modify_req( msc->msc_ld, mdn.bv_val, modv, ctrls, NULL, &msgid); 141 142 if (!ber) { 143 Debug( asyncmeta_debug, "%s asyncmeta_back_modify_start: Operation encoding failed with errno %d\n", 144 op->o_log_prefix, msc->msc_ld->ld_errno ); 145 rs->sr_err = LDAP_OPERATIONS_ERROR; 146 rs->sr_text = "Failed to encode proxied request"; 147 retcode = META_SEARCH_ERR; 148 goto done; 149 } 150 151 if (ber) { 152 struct timeval tv = {0, mt->mt_network_timeout*1000}; 153 ber_socket_t s; 154 if (!( LDAP_BACK_CONN_ISBOUND( msc ) 155 || LDAP_BACK_CONN_ISANON( msc )) || msc->msc_ld == NULL ) { 156 Debug( asyncmeta_debug, "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ ); 157 goto error_unavailable; 158 } 159 160 ldap_get_option( msc->msc_ld, LDAP_OPT_DESC, &s ); 161 if (s < 0) { 162 Debug( asyncmeta_debug, "msc %p not initialized at %s:%d\n", msc, __FILE__, __LINE__ ); 163 goto error_unavailable; 164 } 165 166 rc = ldap_int_poll( msc->msc_ld, s, &tv, 1); 167 if (rc < 0) { 168 Debug( asyncmeta_debug, "msc %p not writable within network timeout %s:%d\n", msc, __FILE__, __LINE__ ); 169 if ((msc->msc_result_time + META_BACK_RESULT_INTERVAL) < slap_get_time()) { 170 rc = LDAP_SERVER_DOWN; 171 } else { 172 goto error_unavailable; 173 } 174 } else { 175 candidates[ candidate ].sr_msgid = msgid; 176 rc = ldap_send_initial_request( msc->msc_ld, LDAP_REQ_MODIFY, 177 mdn.bv_val, ber, msgid ); 178 if (rc == msgid) 179 rc = LDAP_SUCCESS; 180 else 181 rc = LDAP_SERVER_DOWN; 182 ber = NULL; 183 } 184 185 switch ( rc ) { 186 case LDAP_SUCCESS: 187 retcode = META_SEARCH_CANDIDATE; 188 asyncmeta_set_msc_time(msc); 189 goto done; 190 191 case LDAP_SERVER_DOWN: 192 /* do not lock if called from asyncmeta_handle_bind_result. Also do not reset the connection */ 193 if (do_lock > 0) { 194 ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex); 195 asyncmeta_reset_msc(NULL, mc, candidate, 0, __FUNCTION__); 196 ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex); 197 } 198 /* fall though*/ 199 default: 200 Debug( asyncmeta_debug, "msc %p ldap_send_initial_request failed. %s:%d\n", msc, __FILE__, __LINE__ ); 201 goto error_unavailable; 202 } 203 } 204 205 error_unavailable: 206 if (ber) 207 ber_free(ber, 1); 208 switch (bc->nretries[candidate]) { 209 case -1: /* nretries = forever */ 210 ldap_pvt_thread_yield(); 211 retcode = META_SEARCH_NEED_BIND; 212 break; 213 case 0: /* no retries left */ 214 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE; 215 rs->sr_err = LDAP_UNAVAILABLE; 216 rs->sr_text = "Unable to send modify request to target"; 217 retcode = META_SEARCH_ERR; 218 break; 219 default: /* more retries left - try to rebind and go again */ 220 retcode = META_SEARCH_NEED_BIND; 221 bc->nretries[candidate]--; 222 ldap_pvt_thread_yield(); 223 break; 224 } 225 done: 226 (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls ); 227 228 if ( mdn.bv_val != op->o_req_dn.bv_val ) { 229 op->o_tmpfree( mdn.bv_val, op->o_tmpmemctx ); 230 } 231 232 doreturn:; 233 Debug( LDAP_DEBUG_TRACE, "%s <<< asyncmeta_back_modify_start[%p]=%d\n", op->o_log_prefix, msc, candidates[candidate].sr_msgid ); 234 return retcode; 235 } 236 237 int 238 asyncmeta_back_modify( Operation *op, SlapReply *rs ) 239 { 240 a_metainfo_t *mi = ( a_metainfo_t * )op->o_bd->be_private; 241 a_metatarget_t *mt; 242 a_metaconn_t *mc; 243 int rc, candidate = -1; 244 void *thrctx = op->o_threadctx; 245 bm_context_t *bc; 246 SlapReply *candidates; 247 time_t current_time = slap_get_time(); 248 int max_pending_ops = (mi->mi_max_pending_ops == 0) ? META_BACK_CFG_MAX_PENDING_OPS : mi->mi_max_pending_ops; 249 250 Debug(LDAP_DEBUG_ARGS, "==> asyncmeta_back_modify: %s\n", 251 op->o_req_dn.bv_val ); 252 253 if (current_time > op->o_time) { 254 Debug(asyncmeta_debug, "==> asyncmeta_back_modify[%s]: o_time:[%ld], current time: [%ld]\n", 255 op->o_log_prefix, op->o_time, current_time ); 256 } 257 258 asyncmeta_new_bm_context(op, rs, &bc, mi->mi_ntargets, mi ); 259 if (bc == NULL) { 260 rs->sr_err = LDAP_OTHER; 261 send_ldap_result(op, rs); 262 return rs->sr_err; 263 } 264 265 candidates = bc->candidates; 266 mc = asyncmeta_getconn( op, rs, candidates, &candidate, LDAP_BACK_DONTSEND, 0); 267 if ( !mc || rs->sr_err != LDAP_SUCCESS) { 268 send_ldap_result(op, rs); 269 return rs->sr_err; 270 } 271 272 mt = mi->mi_targets[ candidate ]; 273 bc->timeout = mt->mt_timeout[ SLAP_OP_MODIFY ]; 274 bc->retrying = LDAP_BACK_RETRYING; 275 bc->sendok = ( LDAP_BACK_SENDRESULT | bc->retrying ); 276 bc->stoptime = op->o_time + bc->timeout; 277 bc->bc_active = 1; 278 279 if (mc->pending_ops >= max_pending_ops) { 280 rs->sr_err = LDAP_BUSY; 281 rs->sr_text = "Maximum pending ops limit exceeded"; 282 send_ldap_result(op, rs); 283 return rs->sr_err; 284 } 285 286 ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex); 287 rc = asyncmeta_add_message_queue(mc, bc); 288 mc->mc_conns[candidate].msc_active++; 289 ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex); 290 291 if (rc != LDAP_SUCCESS) { 292 rs->sr_err = LDAP_BUSY; 293 rs->sr_text = "Maximum pending ops limit exceeded"; 294 send_ldap_result(op, rs); 295 ldap_pvt_thread_mutex_lock(&mc->mc_om_mutex); 296 mc->mc_conns[candidate].msc_active--; 297 ldap_pvt_thread_mutex_unlock(&mc->mc_om_mutex); 298 goto finish; 299 } 300 301 retry: 302 if (bc->timeout && bc->stoptime < slap_get_time()) { 303 int timeout_err; 304 timeout_err = op->o_protocol >= LDAP_VERSION3 ? 305 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER; 306 rs->sr_err = timeout_err; 307 rs->sr_text = "Operation timed out before it was sent to target"; 308 asyncmeta_error_cleanup(op, rs, bc, mc, candidate); 309 goto finish; 310 } 311 312 rc = asyncmeta_dobind_init_with_retry(op, rs, bc, mc, candidate); 313 switch (rc) 314 { 315 case META_SEARCH_CANDIDATE: 316 /* target is already bound, just send the request */ 317 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: " 318 "cnd=\"%d\"\n", op->o_log_prefix, candidate ); 319 320 rc = asyncmeta_back_modify_start( op, rs, mc, bc, candidate, 1); 321 if (rc == META_SEARCH_ERR) { 322 asyncmeta_error_cleanup(op, rs, bc, mc, candidate); 323 goto finish; 324 325 } else if (rc == META_SEARCH_NEED_BIND) { 326 goto retry; 327 } 328 break; 329 case META_SEARCH_NOT_CANDIDATE: 330 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: NOT_CANDIDATE " 331 "cnd=\"%d\"\n", op->o_log_prefix, candidate ); 332 asyncmeta_error_cleanup(op, rs, bc, mc, candidate); 333 goto finish; 334 335 case META_SEARCH_NEED_BIND: 336 case META_SEARCH_BINDING: 337 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: BINDING " 338 "cnd=\"%d\" %p\n", op->o_log_prefix, candidate , &mc->mc_conns[candidate]); 339 /* Todo add the context to the message queue but do not send the request 340 the receiver must send this when we are done binding */ 341 break; 342 343 case META_SEARCH_ERR: 344 Debug( LDAP_DEBUG_TRACE, "%s asyncmeta_back_modify: ERR " 345 "cnd=\"%d\"\n", op->o_log_prefix, candidate ); 346 asyncmeta_error_cleanup(op, rs, bc, mc, candidate); 347 goto finish; 348 default: 349 assert( 0 ); 350 break; 351 } 352 353 ldap_pvt_thread_mutex_lock( &mc->mc_om_mutex); 354 mc->mc_conns[candidate].msc_active--; 355 asyncmeta_start_one_listener(mc, candidates, bc, candidate); 356 bc->bc_active--; 357 ldap_pvt_thread_mutex_unlock( &mc->mc_om_mutex); 358 rs->sr_err = SLAPD_ASYNCOP; 359 360 finish: 361 return rs->sr_err; 362 } 363
Indexes created Thu Apr 30 00:23:01 UTC 2026