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openldap  2.4.31
Functions
delete.c File Reference
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include "lutil.h"
#include "back-bdb.h"

Go to the source code of this file.

Functions

int bdb_delete (Operation *op, SlapReply *rs)

Function Documentation

int bdb_delete ( Operation op,
SlapReply rs 
)

Definition at line 26 of file delete.c.

{
       struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
       Entry  *matched = NULL;
       struct berval pdn = {0, NULL};
       Entry  *e = NULL;
       Entry  *p = NULL;
       EntryInfo     *ei = NULL, *eip = NULL;
       int           manageDSAit = get_manageDSAit( op );
       AttributeDescription *children = slap_schema.si_ad_children;
       AttributeDescription *entry = slap_schema.si_ad_entry;
       DB_TXN        *ltid = NULL, *lt2;
       struct bdb_op_info opinfo = {{{ 0 }}};
       ID     eid;

       DB_LOCK              lock, plock;

       int           num_retries = 0;

       int     rc;

       LDAPControl **preread_ctrl = NULL;
       LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
       int num_ctrls = 0;

       int    parent_is_glue = 0;
       int parent_is_leaf = 0;

#ifdef LDAP_X_TXN
       int settle = 0;
#endif

       Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(bdb_delete) ": %s\n",
              op->o_req_dn.bv_val, 0, 0 );

#ifdef LDAP_X_TXN
       if( op->o_txnSpec ) {
              /* acquire connection lock */
              ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
              if( op->o_conn->c_txn == CONN_TXN_INACTIVE ) {
                     rs->sr_text = "invalid transaction identifier";
                     rs->sr_err = LDAP_X_TXN_ID_INVALID;
                     goto txnReturn;
              } else if( op->o_conn->c_txn == CONN_TXN_SETTLE ) {
                     settle=1;
                     goto txnReturn;
              }

              if( op->o_conn->c_txn_backend == NULL ) {
                     op->o_conn->c_txn_backend = op->o_bd;

              } else if( op->o_conn->c_txn_backend != op->o_bd ) {
                     rs->sr_text = "transaction cannot span multiple database contexts";
                     rs->sr_err = LDAP_AFFECTS_MULTIPLE_DSAS;
                     goto txnReturn;
              }

              /* insert operation into transaction */

              rs->sr_text = "transaction specified";
              rs->sr_err = LDAP_X_TXN_SPECIFY_OKAY;

txnReturn:
              /* release connection lock */
              ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );

              if( !settle ) {
                     send_ldap_result( op, rs );
                     return rs->sr_err;
              }
       }
#endif

       ctrls[num_ctrls] = 0;

       /* allocate CSN */
       if ( BER_BVISNULL( &op->o_csn ) ) {
              struct berval csn;
              char csnbuf[LDAP_PVT_CSNSTR_BUFSIZE];

              csn.bv_val = csnbuf;
              csn.bv_len = sizeof(csnbuf);
              slap_get_csn( op, &csn, 1 );
       }

       if( 0 ) {
retry: /* transaction retry */
              if( e != NULL ) {
                     bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
                     e = NULL;
              }
              if( p != NULL ) {
                     bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
                     p = NULL;
              }
              Debug( LDAP_DEBUG_TRACE,
                     "==> " LDAP_XSTRING(bdb_delete) ": retrying...\n",
                     0, 0, 0 );
              rs->sr_err = TXN_ABORT( ltid );
              ltid = NULL;
              LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next );
              opinfo.boi_oe.oe_key = NULL;
              op->o_do_not_cache = opinfo.boi_acl_cache;
              if( rs->sr_err != 0 ) {
                     rs->sr_err = LDAP_OTHER;
                     rs->sr_text = "internal error";
                     goto return_results;
              }
              if ( op->o_abandon ) {
                     rs->sr_err = SLAPD_ABANDON;
                     goto return_results;
              }
              parent_is_glue = 0;
              parent_is_leaf = 0;
              bdb_trans_backoff( ++num_retries );
       }

       /* begin transaction */
       rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid, 
              bdb->bi_db_opflags );
       rs->sr_text = NULL;
       if( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(bdb_delete) ": txn_begin failed: "
                     "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }

       opinfo.boi_oe.oe_key = bdb;
       opinfo.boi_txn = ltid;
       opinfo.boi_err = 0;
       opinfo.boi_acl_cache = op->o_do_not_cache;
       LDAP_SLIST_INSERT_HEAD( &op->o_extra, &opinfo.boi_oe, oe_next );

       if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
              dnParent( &op->o_req_ndn, &pdn );
       }

       /* get entry */
       rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
              &lock );

       switch( rs->sr_err ) {
       case 0:
       case DB_NOTFOUND:
              break;
       case DB_LOCK_DEADLOCK:
       case DB_LOCK_NOTGRANTED:
              goto retry;
       case LDAP_BUSY:
              rs->sr_text = "ldap server busy";
              goto return_results;
       default:
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }

       if ( rs->sr_err == 0 ) {
              e = ei->bei_e;
              eip = ei->bei_parent;
       } else {
              matched = ei->bei_e;
       }

       /* FIXME : dn2entry() should return non-glue entry */
       if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
              Debug( LDAP_DEBUG_ARGS,
                     "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n",
                     op->o_req_dn.bv_val, 0, 0);

              if ( matched != NULL ) {
                     rs->sr_matched = ch_strdup( matched->e_dn );
                     rs->sr_ref = is_entry_referral( matched )
                            ? get_entry_referrals( op, matched )
                            : NULL;
                     bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
                     matched = NULL;

              } else {
                     rs->sr_ref = referral_rewrite( default_referral, NULL,
                                   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
              }

              rs->sr_err = LDAP_REFERRAL;
              rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
              goto return_results;
       }

       rc = bdb_cache_find_id( op, ltid, eip->bei_id, &eip, 0, &plock );
       switch( rc ) {
       case DB_LOCK_DEADLOCK:
       case DB_LOCK_NOTGRANTED:
              goto retry;
       case 0:
       case DB_NOTFOUND:
              break;
       default:
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }
       if ( eip ) p = eip->bei_e;

       if ( pdn.bv_len != 0 ) {
              if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
                     Debug( LDAP_DEBUG_TRACE,
                            "<=- " LDAP_XSTRING(bdb_delete) ": parent "
                            "does not exist\n", 0, 0, 0 );
                     rs->sr_err = LDAP_OTHER;
                     rs->sr_text = "could not locate parent of entry";
                     goto return_results;
              }

              /* check parent for "children" acl */
              rs->sr_err = access_allowed( op, p,
                     children, NULL, ACL_WDEL, NULL );

              if ( !rs->sr_err  ) {
                     switch( opinfo.boi_err ) {
                     case DB_LOCK_DEADLOCK:
                     case DB_LOCK_NOTGRANTED:
                            goto retry;
                     }

                     Debug( LDAP_DEBUG_TRACE,
                            "<=- " LDAP_XSTRING(bdb_delete) ": no write "
                            "access to parent\n", 0, 0, 0 );
                     rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
                     rs->sr_text = "no write access to parent";
                     goto return_results;
              }

       } else {
              /* no parent, must be root to delete */
              if( ! be_isroot( op ) ) {
                     if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
                            || be_shadow_update( op ) ) {
                            p = (Entry *)&slap_entry_root;

                            /* check parent for "children" acl */
                            rs->sr_err = access_allowed( op, p,
                                   children, NULL, ACL_WDEL, NULL );

                            p = NULL;

                            if ( !rs->sr_err  ) {
                                   switch( opinfo.boi_err ) {
                                   case DB_LOCK_DEADLOCK:
                                   case DB_LOCK_NOTGRANTED:
                                          goto retry;
                                   }

                                   Debug( LDAP_DEBUG_TRACE,
                                          "<=- " LDAP_XSTRING(bdb_delete)
                                          ": no access to parent\n",
                                          0, 0, 0 );
                                   rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
                                   rs->sr_text = "no write access to parent";
                                   goto return_results;
                            }

                     } else {
                            Debug( LDAP_DEBUG_TRACE,
                                   "<=- " LDAP_XSTRING(bdb_delete)
                                   ": no parent and not root\n", 0, 0, 0 );
                            rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
                            goto return_results;
                     }
              }
       }

       if ( get_assert( op ) &&
              ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
       {
              rs->sr_err = LDAP_ASSERTION_FAILED;
              goto return_results;
       }

       rs->sr_err = access_allowed( op, e,
              entry, NULL, ACL_WDEL, NULL );

       if ( !rs->sr_err  ) {
              switch( opinfo.boi_err ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              }

              Debug( LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(bdb_delete) ": no write access "
                     "to entry\n", 0, 0, 0 );
              rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
              rs->sr_text = "no write access to entry";
              goto return_results;
       }

       if ( !manageDSAit && is_entry_referral( e ) ) {
              /* entry is a referral, don't allow delete */
              rs->sr_ref = get_entry_referrals( op, e );

              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(bdb_delete) ": entry is referral\n",
                     0, 0, 0 );

              rs->sr_err = LDAP_REFERRAL;
              rs->sr_matched = ch_strdup( e->e_name.bv_val );
              rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
              goto return_results;
       }

       /* pre-read */
       if( op->o_preread ) {
              if( preread_ctrl == NULL ) {
                     preread_ctrl = &ctrls[num_ctrls++];
                     ctrls[num_ctrls] = NULL;
              }
              if( slap_read_controls( op, rs, e,
                     &slap_pre_read_bv, preread_ctrl ) )
              {
                     Debug( LDAP_DEBUG_TRACE,
                            "<=- " LDAP_XSTRING(bdb_delete) ": pre-read "
                            "failed!\n", 0, 0, 0 );
                     if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
                            /* FIXME: is it correct to abort
                             * operation if control fails? */
                            goto return_results;
                     }
              }
       }

       /* nested transaction */
       rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2, 
              bdb->bi_db_opflags );
       rs->sr_text = NULL;
       if( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: "
                     "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }

       BDB_LOG_PRINTF( bdb->bi_dbenv, lt2, "slapd Starting delete %s(%d)",
              e->e_nname.bv_val, e->e_id );

       /* Can't do it if we have kids */
       rs->sr_err = bdb_cache_children( op, lt2, e );
       if( rs->sr_err != DB_NOTFOUND ) {
              switch( rs->sr_err ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              case 0:
                     Debug(LDAP_DEBUG_ARGS,
                            "<=- " LDAP_XSTRING(bdb_delete)
                            ": non-leaf %s\n",
                            op->o_req_dn.bv_val, 0, 0);
                     rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
                     rs->sr_text = "subordinate objects must be deleted first";
                     break;
              default:
                     Debug(LDAP_DEBUG_ARGS,
                            "<=- " LDAP_XSTRING(bdb_delete)
                            ": has_children failed: %s (%d)\n",
                            db_strerror(rs->sr_err), rs->sr_err, 0 );
                     rs->sr_err = LDAP_OTHER;
                     rs->sr_text = "internal error";
              }
              goto return_results;
       }

       /* delete from dn2id */
       rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
       if ( rs->sr_err != 0 ) {
              Debug(LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: "
                     "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
              switch( rs->sr_err ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              }
              rs->sr_text = "DN index delete failed";
              rs->sr_err = LDAP_OTHER;
              goto return_results;
       }

       /* delete indices for old attributes */
       rs->sr_err = bdb_index_entry_del( op, lt2, e );
       if ( rs->sr_err != LDAP_SUCCESS ) {
              Debug(LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(bdb_delete) ": index failed: "
                     "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
              switch( rs->sr_err ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              }
              rs->sr_text = "entry index delete failed";
              rs->sr_err = LDAP_OTHER;
              goto return_results;
       }

       /* fixup delete CSN */
       if ( !SLAP_SHADOW( op->o_bd )) {
              struct berval vals[2];

              assert( !BER_BVISNULL( &op->o_csn ) );
              vals[0] = op->o_csn;
              BER_BVZERO( &vals[1] );
              rs->sr_err = bdb_index_values( op, lt2, slap_schema.si_ad_entryCSN,
                     vals, 0, SLAP_INDEX_ADD_OP );
       if ( rs->sr_err != LDAP_SUCCESS ) {
                     switch( rs->sr_err ) {
                     case DB_LOCK_DEADLOCK:
                     case DB_LOCK_NOTGRANTED:
                            goto retry;
                     }
                     rs->sr_text = "entryCSN index update failed";
                     rs->sr_err = LDAP_OTHER;
                     goto return_results;
              }
       }

       /* delete from id2entry */
       rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
       if ( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: "
                     "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
              switch( rs->sr_err ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              }
              rs->sr_text = "entry delete failed";
              rs->sr_err = LDAP_OTHER;
              goto return_results;
       }

       if ( pdn.bv_len != 0 ) {
              parent_is_glue = is_entry_glue(p);
              rs->sr_err = bdb_cache_children( op, lt2, p );
              if ( rs->sr_err != DB_NOTFOUND ) {
                     switch( rs->sr_err ) {
                     case DB_LOCK_DEADLOCK:
                     case DB_LOCK_NOTGRANTED:
                            goto retry;
                     case 0:
                            break;
                     default:
                            Debug(LDAP_DEBUG_ARGS,
                                   "<=- " LDAP_XSTRING(bdb_delete)
                                   ": has_children failed: %s (%d)\n",
                                   db_strerror(rs->sr_err), rs->sr_err, 0 );
                            rs->sr_err = LDAP_OTHER;
                            rs->sr_text = "internal error";
                            goto return_results;
                     }
                     parent_is_leaf = 1;
              }
              bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
              p = NULL;
       }

       BDB_LOG_PRINTF( bdb->bi_dbenv, lt2, "slapd Commit1 delete %s(%d)",
              e->e_nname.bv_val, e->e_id );

       if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "txn_commit(2) failed";
              goto return_results;
       }

       eid = e->e_id;

#if 0  /* Do we want to reclaim deleted IDs? */
       ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
       if ( e->e_id == bdb->bi_lastid ) {
              bdb_last_id( op->o_bd, ltid );
       }
       ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
#endif

       if( op->o_noop ) {
              if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
                     rs->sr_text = "txn_abort (no-op) failed";
              } else {
                     rs->sr_err = LDAP_X_NO_OPERATION;
                     ltid = NULL;
                     goto return_results;
              }
       } else {

              BDB_LOG_PRINTF( bdb->bi_dbenv, ltid, "slapd Cache delete %s(%d)",
                     e->e_nname.bv_val, e->e_id );

              rc = bdb_cache_delete( bdb, e, ltid, &lock );
              switch( rc ) {
              case DB_LOCK_DEADLOCK:
              case DB_LOCK_NOTGRANTED:
                     goto retry;
              }

              rs->sr_err = TXN_COMMIT( ltid, 0 );
       }
       ltid = NULL;
       LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next );
       opinfo.boi_oe.oe_key = NULL;

       BDB_LOG_PRINTF( bdb->bi_dbenv, NULL, "slapd Committed delete %s(%d)",
              e->e_nname.bv_val, e->e_id );

       if( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n",
                     op->o_noop ? "abort (no-op)" : "commit",
                     db_strerror(rs->sr_err), rs->sr_err );
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "commit failed";

              goto return_results;
       }

       Debug( LDAP_DEBUG_TRACE,
              LDAP_XSTRING(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
              op->o_noop ? " (no-op)" : "",
              eid, op->o_req_dn.bv_val );
       rs->sr_err = LDAP_SUCCESS;
       rs->sr_text = NULL;
       if( num_ctrls ) rs->sr_ctrls = ctrls;

return_results:
       if ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
              op->o_delete_glue_parent = 1;
       }

       if ( p )
              bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);

       /* free entry */
       if( e != NULL ) {
              if ( rs->sr_err == LDAP_SUCCESS ) {
                     /* Free the EntryInfo and the Entry */
                     bdb_cache_entryinfo_lock( BEI(e) );
                     bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) );
              } else {
                     bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
              }
       }

       if( ltid != NULL ) {
              TXN_ABORT( ltid );
       }
       if ( opinfo.boi_oe.oe_key ) {
              LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next );
       }

       send_ldap_result( op, rs );
       slap_graduate_commit_csn( op );

       if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
              slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
              slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
       }

       if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp_kbyte ) {
              TXN_CHECKPOINT( bdb->bi_dbenv,
                     bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
       }
       return rs->sr_err;
}