diff options
Diffstat (limited to '')
| -rw-r--r-- | servers/slapd/back-bdb/dn2id.c | 1215 |
1 files changed, 1215 insertions, 0 deletions
diff --git a/servers/slapd/back-bdb/dn2id.c b/servers/slapd/back-bdb/dn2id.c new file mode 100644 index 0000000..1904c9c --- /dev/null +++ b/servers/slapd/back-bdb/dn2id.c @@ -0,0 +1,1215 @@ +/* dn2id.c - routines to deal with the dn2id index */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2000-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * 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>. + */ + +#include "portable.h" + +#include <stdio.h> +#include <ac/string.h> + +#include "back-bdb.h" +#include "idl.h" +#include "lutil.h" + +#ifndef BDB_HIER +int +bdb_dn2id_add( + Operation *op, + DB_TXN *txn, + EntryInfo *eip, + Entry *e ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + int rc; + DBT key, data; + ID nid; + char *buf; + struct berval ptr, pdn; + + Debug( LDAP_DEBUG_TRACE, "=> bdb_dn2id_add 0x%lx: \"%s\"\n", + e->e_id, e->e_ndn, 0 ); + assert( e->e_id != NOID ); + + DBTzero( &key ); + key.size = e->e_nname.bv_len + 2; + key.ulen = key.size; + key.flags = DB_DBT_USERMEM; + buf = op->o_tmpalloc( key.size, op->o_tmpmemctx ); + key.data = buf; + buf[0] = DN_BASE_PREFIX; + ptr.bv_val = buf + 1; + ptr.bv_len = e->e_nname.bv_len; + AC_MEMCPY( ptr.bv_val, e->e_nname.bv_val, e->e_nname.bv_len ); + ptr.bv_val[ptr.bv_len] = '\0'; + + DBTzero( &data ); + data.data = &nid; + data.size = sizeof( nid ); + BDB_ID2DISK( e->e_id, &nid ); + + /* store it -- don't override */ + rc = db->put( db, txn, &key, &data, DB_NOOVERWRITE ); + if( rc != 0 ) { + char buf[ SLAP_TEXT_BUFLEN ]; + snprintf( buf, sizeof( buf ), "%s => bdb_dn2id_add dn=\"%s\" ID=0x%lx", + op->o_log_prefix, e->e_name.bv_val, e->e_id ); + Debug( LDAP_DEBUG_ANY, "%s: put failed: %s %d\n", + buf, db_strerror(rc), rc ); + goto done; + } + +#ifndef BDB_MULTIPLE_SUFFIXES + if( !be_issuffix( op->o_bd, &ptr )) +#endif + { + buf[0] = DN_SUBTREE_PREFIX; + rc = db->put( db, txn, &key, &data, DB_NOOVERWRITE ); + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_add 0x%lx: subtree (%s) put failed: %d\n", + e->e_id, ptr.bv_val, rc ); + goto done; + } + +#ifdef BDB_MULTIPLE_SUFFIXES + if( !be_issuffix( op->o_bd, &ptr )) +#endif + { + dnParent( &ptr, &pdn ); + + key.size = pdn.bv_len + 2; + key.ulen = key.size; + pdn.bv_val[-1] = DN_ONE_PREFIX; + key.data = pdn.bv_val-1; + ptr = pdn; + + rc = bdb_idl_insert_key( op->o_bd, db, txn, &key, e->e_id ); + + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_add 0x%lx: parent (%s) insert failed: %d\n", + e->e_id, ptr.bv_val, rc ); + goto done; + } + } + +#ifndef BDB_MULTIPLE_SUFFIXES + while( !be_issuffix( op->o_bd, &ptr )) +#else + for (;;) +#endif + { + ptr.bv_val[-1] = DN_SUBTREE_PREFIX; + + rc = bdb_idl_insert_key( op->o_bd, db, txn, &key, e->e_id ); + + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_add 0x%lx: subtree (%s) insert failed: %d\n", + e->e_id, ptr.bv_val, rc ); + break; + } +#ifdef BDB_MULTIPLE_SUFFIXES + if( be_issuffix( op->o_bd, &ptr )) break; +#endif + dnParent( &ptr, &pdn ); + + key.size = pdn.bv_len + 2; + key.ulen = key.size; + key.data = pdn.bv_val - 1; + ptr = pdn; + } + } + +done: + op->o_tmpfree( buf, op->o_tmpmemctx ); + Debug( LDAP_DEBUG_TRACE, "<= bdb_dn2id_add 0x%lx: %d\n", e->e_id, rc, 0 ); + return rc; +} + +int +bdb_dn2id_delete( + Operation *op, + DB_TXN *txn, + EntryInfo *eip, + Entry *e ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + char *buf; + DBT key; + struct berval pdn, ptr; + int rc; + + Debug( LDAP_DEBUG_TRACE, "=> bdb_dn2id_delete 0x%lx: \"%s\"\n", + e->e_id, e->e_ndn, 0 ); + + DBTzero( &key ); + key.size = e->e_nname.bv_len + 2; + buf = op->o_tmpalloc( key.size, op->o_tmpmemctx ); + key.data = buf; + key.flags = DB_DBT_USERMEM; + buf[0] = DN_BASE_PREFIX; + ptr.bv_val = buf+1; + ptr.bv_len = e->e_nname.bv_len; + AC_MEMCPY( ptr.bv_val, e->e_nname.bv_val, e->e_nname.bv_len ); + ptr.bv_val[ptr.bv_len] = '\0'; + + /* delete it */ + rc = db->del( db, txn, &key, 0 ); + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, "=> bdb_dn2id_delete 0x%lx: delete failed: %s %d\n", + e->e_id, db_strerror(rc), rc ); + goto done; + } + +#ifndef BDB_MULTIPLE_SUFFIXES + if( !be_issuffix( op->o_bd, &ptr )) +#endif + { + buf[0] = DN_SUBTREE_PREFIX; + rc = bdb_idl_delete_key( op->o_bd, db, txn, &key, e->e_id ); + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_delete 0x%lx: subtree (%s) delete failed: %d\n", + e->e_id, ptr.bv_val, rc ); + goto done; + } + +#ifdef BDB_MULTIPLE_SUFFIXES + if( !be_issuffix( op->o_bd, &ptr )) +#endif + { + dnParent( &ptr, &pdn ); + + key.size = pdn.bv_len + 2; + key.ulen = key.size; + pdn.bv_val[-1] = DN_ONE_PREFIX; + key.data = pdn.bv_val - 1; + ptr = pdn; + + rc = bdb_idl_delete_key( op->o_bd, db, txn, &key, e->e_id ); + + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_delete 0x%lx: parent (%s) delete failed: %d\n", + e->e_id, ptr.bv_val, rc ); + goto done; + } + } + +#ifndef BDB_MULTIPLE_SUFFIXES + while( !be_issuffix( op->o_bd, &ptr )) +#else + for (;;) +#endif + { + ptr.bv_val[-1] = DN_SUBTREE_PREFIX; + + rc = bdb_idl_delete_key( op->o_bd, db, txn, &key, e->e_id ); + if( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "=> bdb_dn2id_delete 0x%lx: subtree (%s) delete failed: %d\n", + e->e_id, ptr.bv_val, rc ); + goto done; + } +#ifdef BDB_MULTIPLE_SUFFIXES + if( be_issuffix( op->o_bd, &ptr )) break; +#endif + dnParent( &ptr, &pdn ); + + key.size = pdn.bv_len + 2; + key.ulen = key.size; + key.data = pdn.bv_val - 1; + ptr = pdn; + } + } + +done: + op->o_tmpfree( buf, op->o_tmpmemctx ); + Debug( LDAP_DEBUG_TRACE, "<= bdb_dn2id_delete 0x%lx: %d\n", e->e_id, rc, 0 ); + return rc; +} + +int +bdb_dn2id( + Operation *op, + struct berval *dn, + EntryInfo *ei, + DB_TXN *txn, + DBC **cursor ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + int rc; + DBT key, data; + ID nid; + + Debug( LDAP_DEBUG_TRACE, "=> bdb_dn2id(\"%s\")\n", dn->bv_val, 0, 0 ); + + DBTzero( &key ); + key.size = dn->bv_len + 2; + key.data = op->o_tmpalloc( key.size, op->o_tmpmemctx ); + ((char *)key.data)[0] = DN_BASE_PREFIX; + AC_MEMCPY( &((char *)key.data)[1], dn->bv_val, key.size - 1 ); + + /* store the ID */ + DBTzero( &data ); + data.data = &nid; + data.ulen = sizeof(ID); + data.flags = DB_DBT_USERMEM; + + rc = db->cursor( db, txn, cursor, bdb->bi_db_opflags ); + + /* fetch it */ + if ( !rc ) + rc = (*cursor)->c_get( *cursor, &key, &data, DB_SET ); + + if( rc != 0 ) { + Debug( LDAP_DEBUG_TRACE, "<= bdb_dn2id: get failed: %s (%d)\n", + db_strerror( rc ), rc, 0 ); + } else { + BDB_DISK2ID( &nid, &ei->bei_id ); + Debug( LDAP_DEBUG_TRACE, "<= bdb_dn2id: got id=0x%lx\n", + ei->bei_id, 0, 0 ); + } + op->o_tmpfree( key.data, op->o_tmpmemctx ); + return rc; +} + +int +bdb_dn2id_children( + Operation *op, + DB_TXN *txn, + Entry *e ) +{ + DBT key, data; + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + ID id; + int rc; + + Debug( LDAP_DEBUG_TRACE, "=> bdb_dn2id_children(\"%s\")\n", + e->e_nname.bv_val, 0, 0 ); + DBTzero( &key ); + key.size = e->e_nname.bv_len + 2; + key.data = op->o_tmpalloc( key.size, op->o_tmpmemctx ); + ((char *)key.data)[0] = DN_ONE_PREFIX; + AC_MEMCPY( &((char *)key.data)[1], e->e_nname.bv_val, key.size - 1 ); + + if ( bdb->bi_idl_cache_size ) { + rc = bdb_idl_cache_get( bdb, db, &key, NULL ); + if ( rc != LDAP_NO_SUCH_OBJECT ) { + op->o_tmpfree( key.data, op->o_tmpmemctx ); + return rc; + } + } + /* we actually could do a empty get... */ + DBTzero( &data ); + data.data = &id; + data.ulen = sizeof(id); + data.flags = DB_DBT_USERMEM; + data.doff = 0; + data.dlen = sizeof(id); + + rc = db->get( db, txn, &key, &data, bdb->bi_db_opflags ); + op->o_tmpfree( key.data, op->o_tmpmemctx ); + + Debug( LDAP_DEBUG_TRACE, "<= bdb_dn2id_children(\"%s\"): %s (%d)\n", + e->e_nname.bv_val, + rc == 0 ? "" : ( rc == DB_NOTFOUND ? "no " : + db_strerror(rc) ), rc ); + + return rc; +} + +int +bdb_dn2idl( + Operation *op, + DB_TXN *txn, + struct berval *ndn, + EntryInfo *ei, + ID *ids, + ID *stack ) +{ + int rc; + DBT key; + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + int prefix = ( op->ors_scope == LDAP_SCOPE_ONELEVEL ) + ? DN_ONE_PREFIX : DN_SUBTREE_PREFIX; + + Debug( LDAP_DEBUG_TRACE, "=> bdb_dn2idl(\"%s\")\n", + ndn->bv_val, 0, 0 ); + +#ifndef BDB_MULTIPLE_SUFFIXES + if ( prefix == DN_SUBTREE_PREFIX + && ( ei->bei_id == 0 || + ( ei->bei_parent->bei_id == 0 && op->o_bd->be_suffix[0].bv_len ))) { + BDB_IDL_ALL(bdb, ids); + return 0; + } +#endif + + DBTzero( &key ); + key.size = ndn->bv_len + 2; + key.ulen = key.size; + key.flags = DB_DBT_USERMEM; + key.data = op->o_tmpalloc( key.size, op->o_tmpmemctx ); + ((char *)key.data)[0] = prefix; + AC_MEMCPY( &((char *)key.data)[1], ndn->bv_val, key.size - 1 ); + + BDB_IDL_ZERO( ids ); + rc = bdb_idl_fetch_key( op->o_bd, db, txn, &key, ids, NULL, 0 ); + + if( rc != 0 ) { + Debug( LDAP_DEBUG_TRACE, + "<= bdb_dn2idl: get failed: %s (%d)\n", + db_strerror( rc ), rc, 0 ); + + } else { + Debug( LDAP_DEBUG_TRACE, + "<= bdb_dn2idl: id=%ld first=%ld last=%ld\n", + (long) ids[0], + (long) BDB_IDL_FIRST( ids ), (long) BDB_IDL_LAST( ids ) ); + } + + op->o_tmpfree( key.data, op->o_tmpmemctx ); + return rc; +} + +#else /* BDB_HIER */ +/* Management routines for a hierarchically structured database. + * + * Instead of a ldbm-style dn2id database, we use a hierarchical one. Each + * entry in this database is a struct diskNode, keyed by entryID and with + * the data containing the RDN and entryID of the node's children. We use + * a B-Tree with sorted duplicates to store all the children of a node under + * the same key. Also, the first item under the key contains the entry's own + * rdn and the ID of the node's parent, to allow bottom-up tree traversal as + * well as top-down. To keep this info first in the list, the high bit of all + * subsequent nrdnlen's is always set. This means we can only accomodate + * RDNs up to length 32767, but that's fine since full DNs are already + * restricted to 8192. + * + * The diskNode is a variable length structure. This definition is not + * directly usable for in-memory manipulation. + */ +typedef struct diskNode { + unsigned char nrdnlen[2]; + char nrdn[1]; + char rdn[1]; /* variable placement */ + unsigned char entryID[sizeof(ID)]; /* variable placement */ +} diskNode; + +/* Sort function for the sorted duplicate data items of a dn2id key. + * Sorts based on normalized RDN, in length order. + */ +int +hdb_dup_compare( + DB *db, + const DBT *usrkey, + const DBT *curkey +) +{ + diskNode *un, *cn; + int rc; + + un = (diskNode *)usrkey->data; + cn = (diskNode *)curkey->data; + + /* data is not aligned, cannot compare directly */ + rc = un->nrdnlen[0] - cn->nrdnlen[0]; + if ( rc ) return rc; + rc = un->nrdnlen[1] - cn->nrdnlen[1]; + if ( rc ) return rc; + + return strcmp( un->nrdn, cn->nrdn ); +} + +/* This function constructs a full DN for a given entry. + */ +int hdb_fix_dn( + Entry *e, + int checkit ) +{ + EntryInfo *ei; + int rlen = 0, nrlen = 0; + char *ptr, *nptr; + int max = 0; + + if ( !e->e_id ) + return 0; + + /* count length of all DN components */ + for ( ei = BEI(e); ei && ei->bei_id; ei=ei->bei_parent ) { + rlen += ei->bei_rdn.bv_len + 1; + nrlen += ei->bei_nrdn.bv_len + 1; + if (ei->bei_modrdns > max) max = ei->bei_modrdns; + } + + /* See if the entry DN was invalidated by a subtree rename */ + if ( checkit ) { + if ( BEI(e)->bei_modrdns >= max ) { + return 0; + } + /* We found a mismatch, tell the caller to lock it */ + if ( checkit == 1 ) { + return 1; + } + /* checkit == 2. do the fix. */ + free( e->e_name.bv_val ); + free( e->e_nname.bv_val ); + } + + e->e_name.bv_len = rlen - 1; + e->e_nname.bv_len = nrlen - 1; + e->e_name.bv_val = ch_malloc(rlen); + e->e_nname.bv_val = ch_malloc(nrlen); + ptr = e->e_name.bv_val; + nptr = e->e_nname.bv_val; + for ( ei = BEI(e); ei && ei->bei_id; ei=ei->bei_parent ) { + ptr = lutil_strcopy(ptr, ei->bei_rdn.bv_val); + nptr = lutil_strcopy(nptr, ei->bei_nrdn.bv_val); + if ( ei->bei_parent ) { + *ptr++ = ','; + *nptr++ = ','; + } + } + BEI(e)->bei_modrdns = max; + if ( ptr > e->e_name.bv_val ) ptr[-1] = '\0'; + if ( nptr > e->e_nname.bv_val ) nptr[-1] = '\0'; + + return 0; +} + +/* We add two elements to the DN2ID database - a data item under the parent's + * entryID containing the child's RDN and entryID, and an item under the + * child's entryID containing the parent's entryID. + */ +int +hdb_dn2id_add( + Operation *op, + DB_TXN *txn, + EntryInfo *eip, + Entry *e ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + DBT key, data; + ID nid; + int rc, rlen, nrlen; + diskNode *d; + char *ptr; + + Debug( LDAP_DEBUG_TRACE, "=> hdb_dn2id_add 0x%lx: \"%s\"\n", + e->e_id, e->e_ndn, 0 ); + + nrlen = dn_rdnlen( op->o_bd, &e->e_nname ); + if (nrlen) { + rlen = dn_rdnlen( op->o_bd, &e->e_name ); + } else { + nrlen = e->e_nname.bv_len; + rlen = e->e_name.bv_len; + } + + d = op->o_tmpalloc(sizeof(diskNode) + rlen + nrlen, op->o_tmpmemctx); + d->nrdnlen[1] = nrlen & 0xff; + d->nrdnlen[0] = (nrlen >> 8) | 0x80; + ptr = lutil_strncopy( d->nrdn, e->e_nname.bv_val, nrlen ); + *ptr++ = '\0'; + ptr = lutil_strncopy( ptr, e->e_name.bv_val, rlen ); + *ptr++ = '\0'; + BDB_ID2DISK( e->e_id, ptr ); + + DBTzero(&key); + DBTzero(&data); + key.size = sizeof(ID); + key.flags = DB_DBT_USERMEM; + BDB_ID2DISK( eip->bei_id, &nid ); + + key.data = &nid; + + /* Need to make dummy root node once. Subsequent attempts + * will fail harmlessly. + */ + if ( eip->bei_id == 0 ) { + diskNode dummy = {{0, 0}, "", "", ""}; + data.data = &dummy; + data.size = sizeof(diskNode); + data.flags = DB_DBT_USERMEM; + + db->put( db, txn, &key, &data, DB_NODUPDATA ); + } + + data.data = d; + data.size = sizeof(diskNode) + rlen + nrlen; + data.flags = DB_DBT_USERMEM; + + rc = db->put( db, txn, &key, &data, DB_NODUPDATA ); + + if (rc == 0) { + BDB_ID2DISK( e->e_id, &nid ); + BDB_ID2DISK( eip->bei_id, ptr ); + d->nrdnlen[0] ^= 0x80; + + rc = db->put( db, txn, &key, &data, DB_NODUPDATA ); + } + + /* Update all parents' IDL cache entries */ + if ( rc == 0 && bdb->bi_idl_cache_size ) { + ID tmp[2]; + char *ptr = ((char *)&tmp[1])-1; + key.data = ptr; + key.size = sizeof(ID)+1; + tmp[1] = eip->bei_id; + *ptr = DN_ONE_PREFIX; + bdb_idl_cache_add_id( bdb, db, &key, e->e_id ); + if ( eip->bei_parent ) { + *ptr = DN_SUBTREE_PREFIX; + for (; eip && eip->bei_parent->bei_id; eip = eip->bei_parent) { + tmp[1] = eip->bei_id; + bdb_idl_cache_add_id( bdb, db, &key, e->e_id ); + } + /* Handle DB with empty suffix */ + if ( !op->o_bd->be_suffix[0].bv_len && eip ) { + tmp[1] = eip->bei_id; + bdb_idl_cache_add_id( bdb, db, &key, e->e_id ); + } + } + } + + op->o_tmpfree( d, op->o_tmpmemctx ); + Debug( LDAP_DEBUG_TRACE, "<= hdb_dn2id_add 0x%lx: %d\n", e->e_id, rc, 0 ); + + return rc; +} + +int +hdb_dn2id_delete( + Operation *op, + DB_TXN *txn, + EntryInfo *eip, + Entry *e ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + DBT key, data; + DBC *cursor; + diskNode *d; + int rc; + ID nid; + unsigned char dlen[2]; + + Debug( LDAP_DEBUG_TRACE, "=> hdb_dn2id_delete 0x%lx: \"%s\"\n", + e->e_id, e->e_ndn, 0 ); + + DBTzero(&key); + key.size = sizeof(ID); + key.ulen = key.size; + key.flags = DB_DBT_USERMEM; + BDB_ID2DISK( eip->bei_id, &nid ); + + DBTzero(&data); + data.size = sizeof(diskNode) + BEI(e)->bei_nrdn.bv_len - sizeof(ID) - 1; + data.ulen = data.size; + data.dlen = data.size; + data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL; + + key.data = &nid; + + d = op->o_tmpalloc( data.size, op->o_tmpmemctx ); + d->nrdnlen[1] = BEI(e)->bei_nrdn.bv_len & 0xff; + d->nrdnlen[0] = (BEI(e)->bei_nrdn.bv_len >> 8) | 0x80; + dlen[0] = d->nrdnlen[0]; + dlen[1] = d->nrdnlen[1]; + memcpy( d->nrdn, BEI(e)->bei_nrdn.bv_val, BEI(e)->bei_nrdn.bv_len+1 ); + data.data = d; + + rc = db->cursor( db, txn, &cursor, bdb->bi_db_opflags ); + if ( rc ) goto func_leave; + + /* Delete our ID from the parent's list */ + rc = cursor->c_get( cursor, &key, &data, DB_GET_BOTH_RANGE ); + if ( rc == 0 ) { + if ( dlen[1] == d->nrdnlen[1] && dlen[0] == d->nrdnlen[0] && + !strcmp( d->nrdn, BEI(e)->bei_nrdn.bv_val )) + rc = cursor->c_del( cursor, 0 ); + else + rc = DB_NOTFOUND; + } + + /* Delete our ID from the tree. With sorted duplicates, this + * will leave any child nodes still hanging around. This is OK + * for modrdn, which will add our info back in later. + */ + if ( rc == 0 ) { + BDB_ID2DISK( e->e_id, &nid ); + rc = cursor->c_get( cursor, &key, &data, DB_SET ); + if ( rc == 0 ) + rc = cursor->c_del( cursor, 0 ); + } + + cursor->c_close( cursor ); +func_leave: + op->o_tmpfree( d, op->o_tmpmemctx ); + + /* Delete IDL cache entries */ + if ( rc == 0 && bdb->bi_idl_cache_size ) { + ID tmp[2]; + char *ptr = ((char *)&tmp[1])-1; + key.data = ptr; + key.size = sizeof(ID)+1; + tmp[1] = eip->bei_id; + *ptr = DN_ONE_PREFIX; + bdb_idl_cache_del_id( bdb, db, &key, e->e_id ); + if ( eip ->bei_parent ) { + *ptr = DN_SUBTREE_PREFIX; + for (; eip && eip->bei_parent->bei_id; eip = eip->bei_parent) { + tmp[1] = eip->bei_id; + bdb_idl_cache_del_id( bdb, db, &key, e->e_id ); + } + /* Handle DB with empty suffix */ + if ( !op->o_bd->be_suffix[0].bv_len && eip ) { + tmp[1] = eip->bei_id; + bdb_idl_cache_del_id( bdb, db, &key, e->e_id ); + } + } + } + Debug( LDAP_DEBUG_TRACE, "<= hdb_dn2id_delete 0x%lx: %d\n", e->e_id, rc, 0 ); + return rc; +} + + +int +hdb_dn2id( + Operation *op, + struct berval *in, + EntryInfo *ei, + DB_TXN *txn, + DBC **cursor ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + DBT key, data; + int rc = 0, nrlen; + diskNode *d; + char *ptr; + unsigned char dlen[2]; + ID idp, parentID; + + Debug( LDAP_DEBUG_TRACE, "=> hdb_dn2id(\"%s\")\n", in->bv_val, 0, 0 ); + + nrlen = dn_rdnlen( op->o_bd, in ); + if (!nrlen) nrlen = in->bv_len; + + DBTzero(&key); + key.size = sizeof(ID); + key.data = &idp; + key.ulen = sizeof(ID); + key.flags = DB_DBT_USERMEM; + parentID = ( ei->bei_parent != NULL ) ? ei->bei_parent->bei_id : 0; + BDB_ID2DISK( parentID, &idp ); + + DBTzero(&data); + data.size = sizeof(diskNode) + nrlen - sizeof(ID) - 1; + data.ulen = data.size * 3; + data.dlen = data.ulen; + data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL; + + rc = db->cursor( db, txn, cursor, bdb->bi_db_opflags ); + if ( rc ) return rc; + + d = op->o_tmpalloc( data.size * 3, op->o_tmpmemctx ); + d->nrdnlen[1] = nrlen & 0xff; + d->nrdnlen[0] = (nrlen >> 8) | 0x80; + dlen[0] = d->nrdnlen[0]; + dlen[1] = d->nrdnlen[1]; + ptr = lutil_strncopy( d->nrdn, in->bv_val, nrlen ); + *ptr = '\0'; + data.data = d; + + rc = (*cursor)->c_get( *cursor, &key, &data, DB_GET_BOTH_RANGE ); + if ( rc == 0 && (dlen[1] != d->nrdnlen[1] || dlen[0] != d->nrdnlen[0] || + strncmp( d->nrdn, in->bv_val, nrlen ))) { + rc = DB_NOTFOUND; + } + if ( rc == 0 ) { + ptr = (char *) data.data + data.size - sizeof(ID); + BDB_DISK2ID( ptr, &ei->bei_id ); + ei->bei_rdn.bv_len = data.size - sizeof(diskNode) - nrlen; + ptr = d->nrdn + nrlen + 1; + ber_str2bv( ptr, ei->bei_rdn.bv_len, 1, &ei->bei_rdn ); + if ( ei->bei_parent != NULL && !ei->bei_parent->bei_dkids ) { + db_recno_t dkids; + /* How many children does the parent have? */ + /* FIXME: do we need to lock the parent + * entryinfo? Seems safe... + */ + (*cursor)->c_count( *cursor, &dkids, 0 ); + ei->bei_parent->bei_dkids = dkids; + } + } + + op->o_tmpfree( d, op->o_tmpmemctx ); + if( rc != 0 ) { + Debug( LDAP_DEBUG_TRACE, "<= hdb_dn2id: get failed: %s (%d)\n", + db_strerror( rc ), rc, 0 ); + } else { + Debug( LDAP_DEBUG_TRACE, "<= hdb_dn2id: got id=0x%lx\n", + ei->bei_id, 0, 0 ); + } + + return rc; +} + +int +hdb_dn2id_parent( + Operation *op, + DB_TXN *txn, + EntryInfo *ei, + ID *idp ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + DBT key, data; + DBC *cursor; + int rc = 0; + diskNode *d; + char *ptr; + ID nid; + + DBTzero(&key); + key.size = sizeof(ID); + key.data = &nid; + key.ulen = sizeof(ID); + key.flags = DB_DBT_USERMEM; + BDB_ID2DISK( ei->bei_id, &nid ); + + DBTzero(&data); + data.flags = DB_DBT_USERMEM; + + rc = db->cursor( db, txn, &cursor, bdb->bi_db_opflags ); + if ( rc ) return rc; + + data.ulen = sizeof(diskNode) + (SLAP_LDAPDN_MAXLEN * 2); + d = op->o_tmpalloc( data.ulen, op->o_tmpmemctx ); + data.data = d; + + rc = cursor->c_get( cursor, &key, &data, DB_SET ); + if ( rc == 0 ) { + if (d->nrdnlen[0] & 0x80) { + rc = LDAP_OTHER; + } else { + db_recno_t dkids; + ptr = (char *) data.data + data.size - sizeof(ID); + BDB_DISK2ID( ptr, idp ); + ei->bei_nrdn.bv_len = (d->nrdnlen[0] << 8) | d->nrdnlen[1]; + ber_str2bv( d->nrdn, ei->bei_nrdn.bv_len, 1, &ei->bei_nrdn ); + ei->bei_rdn.bv_len = data.size - sizeof(diskNode) - + ei->bei_nrdn.bv_len; + ptr = d->nrdn + ei->bei_nrdn.bv_len + 1; + ber_str2bv( ptr, ei->bei_rdn.bv_len, 1, &ei->bei_rdn ); + /* How many children does this node have? */ + cursor->c_count( cursor, &dkids, 0 ); + ei->bei_dkids = dkids; + } + } + cursor->c_close( cursor ); + op->o_tmpfree( d, op->o_tmpmemctx ); + return rc; +} + +int +hdb_dn2id_children( + Operation *op, + DB_TXN *txn, + Entry *e ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + DB *db = bdb->bi_dn2id->bdi_db; + DBT key, data; + DBC *cursor; + int rc; + ID id; + diskNode d; + + DBTzero(&key); + key.size = sizeof(ID); + key.data = &e->e_id; + key.flags = DB_DBT_USERMEM; + BDB_ID2DISK( e->e_id, &id ); + + /* IDL cache is in host byte order */ + if ( bdb->bi_idl_cache_size ) { + rc = bdb_idl_cache_get( bdb, db, &key, NULL ); + if ( rc != LDAP_NO_SUCH_OBJECT ) { + return rc; + } + } + + key.data = &id; + DBTzero(&data); + data.data = &d; + data.ulen = sizeof(d); + data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL; + data.dlen = sizeof(d); + + rc = db->cursor( db, txn, &cursor, bdb->bi_db_opflags ); + if ( rc ) return rc; + + rc = cursor->c_get( cursor, &key, &data, DB_SET ); + if ( rc == 0 ) { + db_recno_t dkids; + rc = cursor->c_count( cursor, &dkids, 0 ); + if ( rc == 0 ) { + BEI(e)->bei_dkids = dkids; + if ( dkids < 2 ) rc = DB_NOTFOUND; + } + } + cursor->c_close( cursor ); + return rc; +} + +/* bdb_dn2idl: + * We can't just use bdb_idl_fetch_key because + * 1 - our data items are longer than just an entry ID + * 2 - our data items are sorted alphabetically by nrdn, not by ID. + * + * We descend the tree recursively, so we define this cookie + * to hold our necessary state information. The bdb_dn2idl_internal + * function uses this cookie when calling itself. + */ + +struct dn2id_cookie { + struct bdb_info *bdb; + Operation *op; + DB_TXN *txn; + EntryInfo *ei; + ID *ids; + ID *tmp; + ID *buf; + DB *db; + DBC *dbc; + DBT key; + DBT data; + ID dbuf; + ID id; + ID nid; + int rc; + int depth; + char need_sort; + char prefix; +}; + +static int +apply_func( + void *data, + void *arg ) +{ + EntryInfo *ei = data; + ID *idl = arg; + + bdb_idl_append_one( idl, ei->bei_id ); + return 0; +} + +static int +hdb_dn2idl_internal( + struct dn2id_cookie *cx +) +{ + BDB_IDL_ZERO( cx->tmp ); + + if ( cx->bdb->bi_idl_cache_size ) { + char *ptr = ((char *)&cx->id)-1; + + cx->key.data = ptr; + cx->key.size = sizeof(ID)+1; + if ( cx->prefix == DN_SUBTREE_PREFIX ) { + ID *ids = cx->depth ? cx->tmp : cx->ids; + *ptr = cx->prefix; + cx->rc = bdb_idl_cache_get(cx->bdb, cx->db, &cx->key, ids); + if ( cx->rc == LDAP_SUCCESS ) { + if ( cx->depth ) { + bdb_idl_delete( cx->tmp, cx->id ); /* ITS#6983, drop our own ID */ + bdb_idl_append( cx->ids, cx->tmp ); + cx->need_sort = 1; + } + return cx->rc; + } + } + *ptr = DN_ONE_PREFIX; + cx->rc = bdb_idl_cache_get(cx->bdb, cx->db, &cx->key, cx->tmp); + if ( cx->rc == LDAP_SUCCESS ) { + goto gotit; + } + if ( cx->rc == DB_NOTFOUND ) { + return cx->rc; + } + } + + bdb_cache_entryinfo_lock( cx->ei ); + + /* If number of kids in the cache differs from on-disk, load + * up all the kids from the database + */ + if ( cx->ei->bei_ckids+1 != cx->ei->bei_dkids ) { + EntryInfo ei; + db_recno_t dkids = cx->ei->bei_dkids; + ei.bei_parent = cx->ei; + + /* Only one thread should load the cache */ + while ( cx->ei->bei_state & CACHE_ENTRY_ONELEVEL ) { + bdb_cache_entryinfo_unlock( cx->ei ); + ldap_pvt_thread_yield(); + bdb_cache_entryinfo_lock( cx->ei ); + if ( cx->ei->bei_ckids+1 == cx->ei->bei_dkids ) { + goto synced; + } + } + + cx->ei->bei_state |= CACHE_ENTRY_ONELEVEL; + + bdb_cache_entryinfo_unlock( cx->ei ); + + cx->rc = cx->db->cursor( cx->db, NULL, &cx->dbc, + cx->bdb->bi_db_opflags ); + if ( cx->rc ) + goto done_one; + + cx->data.data = &cx->dbuf; + cx->data.ulen = sizeof(ID); + cx->data.dlen = sizeof(ID); + cx->data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL; + + /* The first item holds the parent ID. Ignore it. */ + cx->key.data = &cx->nid; + cx->key.size = sizeof(ID); + cx->rc = cx->dbc->c_get( cx->dbc, &cx->key, &cx->data, DB_SET ); + if ( cx->rc ) { + cx->dbc->c_close( cx->dbc ); + goto done_one; + } + + /* If the on-disk count is zero we've never checked it. + * Count it now. + */ + if ( !dkids ) { + cx->dbc->c_count( cx->dbc, &dkids, 0 ); + cx->ei->bei_dkids = dkids; + } + + cx->data.data = cx->buf; + cx->data.ulen = BDB_IDL_UM_SIZE * sizeof(ID); + cx->data.flags = DB_DBT_USERMEM; + + if ( dkids > 1 ) { + /* Fetch the rest of the IDs in a loop... */ + while ( (cx->rc = cx->dbc->c_get( cx->dbc, &cx->key, &cx->data, + DB_MULTIPLE | DB_NEXT_DUP )) == 0 ) { + u_int8_t *j; + size_t len; + void *ptr; + DB_MULTIPLE_INIT( ptr, &cx->data ); + while (ptr) { + DB_MULTIPLE_NEXT( ptr, &cx->data, j, len ); + if (j) { + EntryInfo *ei2; + diskNode *d = (diskNode *)j; + short nrlen; + + BDB_DISK2ID( j + len - sizeof(ID), &ei.bei_id ); + nrlen = ((d->nrdnlen[0] ^ 0x80) << 8) | d->nrdnlen[1]; + ei.bei_nrdn.bv_len = nrlen; + /* nrdn/rdn are set in-place. + * hdb_cache_load will copy them as needed + */ + ei.bei_nrdn.bv_val = d->nrdn; + ei.bei_rdn.bv_len = len - sizeof(diskNode) + - ei.bei_nrdn.bv_len; + ei.bei_rdn.bv_val = d->nrdn + ei.bei_nrdn.bv_len + 1; + bdb_idl_append_one( cx->tmp, ei.bei_id ); + hdb_cache_load( cx->bdb, &ei, &ei2 ); + } + } + } + } + + cx->rc = cx->dbc->c_close( cx->dbc ); +done_one: + bdb_cache_entryinfo_lock( cx->ei ); + cx->ei->bei_state &= ~CACHE_ENTRY_ONELEVEL; + bdb_cache_entryinfo_unlock( cx->ei ); + if ( cx->rc ) + return cx->rc; + + } else { + /* The in-memory cache is in sync with the on-disk data. + * do we have any kids? + */ +synced: + cx->rc = 0; + if ( cx->ei->bei_ckids > 0 ) { + /* Walk the kids tree; order is irrelevant since bdb_idl_sort + * will sort it later. + */ + avl_apply( cx->ei->bei_kids, apply_func, + cx->tmp, -1, AVL_POSTORDER ); + } + bdb_cache_entryinfo_unlock( cx->ei ); + } + + if ( !BDB_IDL_IS_RANGE( cx->tmp ) && cx->tmp[0] > 3 ) + bdb_idl_sort( cx->tmp, cx->buf ); + if ( cx->bdb->bi_idl_cache_max_size && !BDB_IDL_IS_ZERO( cx->tmp )) { + char *ptr = ((char *)&cx->id)-1; + cx->key.data = ptr; + cx->key.size = sizeof(ID)+1; + *ptr = DN_ONE_PREFIX; + bdb_idl_cache_put( cx->bdb, cx->db, &cx->key, cx->tmp, cx->rc ); + } + +gotit: + if ( !BDB_IDL_IS_ZERO( cx->tmp )) { + if ( cx->prefix == DN_SUBTREE_PREFIX ) { + bdb_idl_append( cx->ids, cx->tmp ); + cx->need_sort = 1; + if ( !(cx->ei->bei_state & CACHE_ENTRY_NO_GRANDKIDS)) { + ID *save, idcurs; + EntryInfo *ei = cx->ei; + int nokids = 1; + save = cx->op->o_tmpalloc( BDB_IDL_SIZEOF( cx->tmp ), + cx->op->o_tmpmemctx ); + BDB_IDL_CPY( save, cx->tmp ); + + idcurs = 0; + cx->depth++; + for ( cx->id = bdb_idl_first( save, &idcurs ); + cx->id != NOID; + cx->id = bdb_idl_next( save, &idcurs )) { + EntryInfo *ei2; + cx->ei = NULL; + if ( bdb_cache_find_id( cx->op, cx->txn, cx->id, &cx->ei, + ID_NOENTRY, NULL )) + continue; + if ( cx->ei ) { + ei2 = cx->ei; + if ( !( ei2->bei_state & CACHE_ENTRY_NO_KIDS )) { + BDB_ID2DISK( cx->id, &cx->nid ); + hdb_dn2idl_internal( cx ); + if ( !BDB_IDL_IS_ZERO( cx->tmp )) + nokids = 0; + } + bdb_cache_entryinfo_lock( ei2 ); + ei2->bei_finders--; + bdb_cache_entryinfo_unlock( ei2 ); + } + } + cx->depth--; + cx->op->o_tmpfree( save, cx->op->o_tmpmemctx ); + if ( nokids ) { + bdb_cache_entryinfo_lock( ei ); + ei->bei_state |= CACHE_ENTRY_NO_GRANDKIDS; + bdb_cache_entryinfo_unlock( ei ); + } + } + /* Make sure caller knows it had kids! */ + cx->tmp[0]=1; + + cx->rc = 0; + } else { + BDB_IDL_CPY( cx->ids, cx->tmp ); + } + } + return cx->rc; +} + +int +hdb_dn2idl( + Operation *op, + DB_TXN *txn, + struct berval *ndn, + EntryInfo *ei, + ID *ids, + ID *stack ) +{ + struct bdb_info *bdb = (struct bdb_info *)op->o_bd->be_private; + struct dn2id_cookie cx; + + Debug( LDAP_DEBUG_TRACE, "=> hdb_dn2idl(\"%s\")\n", + ndn->bv_val, 0, 0 ); + +#ifndef BDB_MULTIPLE_SUFFIXES + if ( op->ors_scope != LDAP_SCOPE_ONELEVEL && + ( ei->bei_id == 0 || + ( ei->bei_parent->bei_id == 0 && op->o_bd->be_suffix[0].bv_len ))) + { + BDB_IDL_ALL( bdb, ids ); + return 0; + } +#endif + + cx.id = ei->bei_id; + BDB_ID2DISK( cx.id, &cx.nid ); + cx.ei = ei; + cx.bdb = bdb; + cx.db = cx.bdb->bi_dn2id->bdi_db; + cx.prefix = (op->ors_scope == LDAP_SCOPE_ONELEVEL) ? + DN_ONE_PREFIX : DN_SUBTREE_PREFIX; + cx.ids = ids; + cx.tmp = stack; + cx.buf = stack + BDB_IDL_UM_SIZE; + cx.op = op; + cx.txn = txn; + cx.need_sort = 0; + cx.depth = 0; + + if ( cx.prefix == DN_SUBTREE_PREFIX ) { + ids[0] = 1; + ids[1] = cx.id; + } else { + BDB_IDL_ZERO( ids ); + } + if ( cx.ei->bei_state & CACHE_ENTRY_NO_KIDS ) + return LDAP_SUCCESS; + + DBTzero(&cx.key); + cx.key.ulen = sizeof(ID); + cx.key.size = sizeof(ID); + cx.key.flags = DB_DBT_USERMEM; + + DBTzero(&cx.data); + + hdb_dn2idl_internal(&cx); + if ( cx.need_sort ) { + char *ptr = ((char *)&cx.id)-1; + if ( !BDB_IDL_IS_RANGE( cx.ids ) && cx.ids[0] > 3 ) + bdb_idl_sort( cx.ids, cx.tmp ); + cx.key.data = ptr; + cx.key.size = sizeof(ID)+1; + *ptr = cx.prefix; + cx.id = ei->bei_id; + if ( cx.bdb->bi_idl_cache_max_size ) + bdb_idl_cache_put( cx.bdb, cx.db, &cx.key, cx.ids, cx.rc ); + } + + if ( cx.rc == DB_NOTFOUND ) + cx.rc = LDAP_SUCCESS; + + return cx.rc; +} +#endif /* BDB_HIER */ |