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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-mdb.h"

Go to the source code of this file.

Functions

int mdb_delete (Operation *op, SlapReply *rs)

Function Documentation

int mdb_delete ( Operation op,
SlapReply rs 
)

Definition at line 26 of file delete.c.

{
       struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
       struct berval pdn = {0, NULL};
       Entry  *e = NULL;
       Entry  *p = NULL;
       int           manageDSAit = get_manageDSAit( op );
       AttributeDescription *children = slap_schema.si_ad_children;
       AttributeDescription *entry = slap_schema.si_ad_entry;
       MDB_txn              *txn = NULL;
       MDB_cursor    *mc;
       mdb_op_info opinfo = {{{ 0 }}}, *moi = &opinfo;

       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(mdb_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 );
       }

       /* begin transaction */
       rs->sr_err = mdb_opinfo_get( op, mdb, 0, &moi );
       rs->sr_text = NULL;
       if( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(mdb_delete) ": txn_begin failed: "
                     "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }

       txn = moi->moi_txn;

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

       rs->sr_err = mdb_cursor_open( txn, mdb->mi_dn2id, &mc );
       if ( rs->sr_err ) {
              rs->sr_err = LDAP_OTHER;
              rs->sr_text = "internal error";
              goto return_results;
       }
       /* get parent */
       rs->sr_err = mdb_dn2entry( op, txn, mc, &pdn, &p, 1 );
       switch( rs->sr_err ) {
       case 0:
       case MDB_NOTFOUND:
              break;
       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 == MDB_NOTFOUND ) {
              Debug( LDAP_DEBUG_ARGS,
                     "<=- " LDAP_XSTRING(mdb_delete) ": no such object %s\n",
                     op->o_req_dn.bv_val, 0, 0);

              if ( p && !BER_BVISEMPTY( &p->e_name )) {
                     rs->sr_matched = ch_strdup( p->e_name.bv_val );
                     if ( is_entry_referral( p )) {
                            BerVarray ref = get_entry_referrals( op, p );
                            rs->sr_ref = referral_rewrite( ref, &p->e_name,
                                   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
                            ber_bvarray_free( ref );
                     } else {
                            rs->sr_ref = NULL;
                     }
              } else {
                     rs->sr_ref = referral_rewrite( default_referral, NULL,
                                   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
              }
              if ( p ) {
                     mdb_entry_return( op, p );
                     p = NULL;
              }

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

       /* get entry */
       rs->sr_err = mdb_dn2entry( op, txn, mc, &op->o_req_ndn, &e, 0 );
       switch( rs->sr_err ) {
       case MDB_NOTFOUND:
              e = p;
              p = NULL;
       case 0:
              break;
       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;
       }

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

              rs->sr_matched = ch_strdup( e->e_dn );
              if ( is_entry_referral( e )) {
                     BerVarray ref = get_entry_referrals( op, e );
                     rs->sr_ref = referral_rewrite( ref, &e->e_name,
                            &op->o_req_dn, LDAP_SCOPE_DEFAULT );
                     ber_bvarray_free( ref );
              } else {
                     rs->sr_ref = NULL;
              }
              mdb_entry_return( op, e );
              e = NULL;

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

       if ( pdn.bv_len != 0 ) {
              /* check parent for "children" acl */
              rs->sr_err = access_allowed( op, p,
                     children, NULL, ACL_WDEL, NULL );

              if ( !rs->sr_err  ) {
                     Debug( LDAP_DEBUG_TRACE,
                            "<=- " LDAP_XSTRING(mdb_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  ) {
                                   Debug( LDAP_DEBUG_TRACE,
                                          "<=- " LDAP_XSTRING(mdb_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(mdb_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  ) {
              Debug( LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(mdb_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(mdb_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(mdb_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;
                     }
              }
       }

       rs->sr_text = NULL;

       /* Can't do it if we have kids */
       rs->sr_err = mdb_dn2id_children( op, txn, e );
       if( rs->sr_err != MDB_NOTFOUND ) {
              switch( rs->sr_err ) {
              case 0:
                     Debug(LDAP_DEBUG_ARGS,
                            "<=- " LDAP_XSTRING(mdb_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(mdb_delete)
                            ": has_children failed: %s (%d)\n",
                            mdb_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 = mdb_dn2id_delete( op, mc, e->e_id );
       mdb_cursor_close( mc );
       if ( rs->sr_err != 0 ) {
              Debug(LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(mdb_delete) ": dn2id failed: "
                     "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
              rs->sr_text = "DN index delete failed";
              rs->sr_err = LDAP_OTHER;
              goto return_results;
       }

       /* delete indices for old attributes */
       rs->sr_err = mdb_index_entry_del( op, txn, e );
       if ( rs->sr_err != LDAP_SUCCESS ) {
              Debug(LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(mdb_delete) ": index failed: "
                     "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
              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 = mdb_index_values( op, txn, slap_schema.si_ad_entryCSN,
                     vals, 0, SLAP_INDEX_ADD_OP );
              if ( rs->sr_err != LDAP_SUCCESS ) {
                     rs->sr_text = "entryCSN index update failed";
                     rs->sr_err = LDAP_OTHER;
                     goto return_results;
              }
       }

       /* delete from id2entry */
       rs->sr_err = mdb_id2entry_delete( op->o_bd, txn, e );
       if ( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     "<=- " LDAP_XSTRING(mdb_delete) ": id2entry failed: "
                     "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
              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 = mdb_dn2id_children( op, txn, p );
              if ( rs->sr_err != MDB_NOTFOUND ) {
                     switch( rs->sr_err ) {
                     case 0:
                            break;
                     default:
                            Debug(LDAP_DEBUG_ARGS,
                                   "<=- " LDAP_XSTRING(mdb_delete)
                                   ": has_children failed: %s (%d)\n",
                                   mdb_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;
              }
              mdb_entry_return( op, p );
              p = NULL;
       }

       if( moi == &opinfo ) {
              LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
              opinfo.moi_oe.oe_key = NULL;
              if( op->o_noop ) {
                     mdb_txn_abort( txn );
                     rs->sr_err = LDAP_X_NO_OPERATION;
                     txn = NULL;
                     goto return_results;
              } else {
                     rs->sr_err = mdb_txn_commit( txn );
              }
              txn = NULL;
       }

       if( rs->sr_err != 0 ) {
              Debug( LDAP_DEBUG_TRACE,
                     LDAP_XSTRING(mdb_delete) ": txn_%s failed: %s (%d)\n",
                     op->o_noop ? "abort (no-op)" : "commit",
                     mdb_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(mdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
              op->o_noop ? " (no-op)" : "",
              e->e_id, 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 != NULL ) {
              mdb_entry_return( op, p );
       }

       /* free entry */
       if( e != NULL ) {
              mdb_entry_return( op, e );
       }

       if( moi == &opinfo ) {
              if( txn != NULL ) {
                     mdb_txn_abort( txn );
              }
              if ( opinfo.moi_oe.oe_key ) {
                     LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_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 0
       if( rs->sr_err == LDAP_SUCCESS && mdb->bi_txn_cp_kbyte ) {
              TXN_CHECKPOINT( mdb->bi_dbenv,
                     mdb->bi_txn_cp_kbyte, mdb->bi_txn_cp_min, 0 );
       }
#endif
       return rs->sr_err;
}