/* Find each id in ids that is a child of base and move it to res.
*/
int
mdb_idscope(
Operation *op,
MDB_txn *txn,
ID base,
ID *ids,
ID *res )
{
struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
MDB_dbi dbi = mdb->mi_dn2id;
MDB_val key, data;
MDB_cursor *cursor;
ID ida, id, cid = 0, ci0 = 0, idc = 0;
char *ptr;
int rc, copy;
key.mv_size = sizeof(ID);
MDB_IDL_ZERO( res );
rc = mdb_cursor_open( txn, dbi, &cursor );
if ( rc ) return rc;
ida = mdb_idl_first( ids, &cid );
/* Don't bother moving out of ids if it's a range */
if (!MDB_IDL_IS_RANGE(ids)) {
idc = ids[0];
ci0 = cid;
}
while (ida != NOID) {
copy = 1;
id = ida;
while (id) {
key.mv_data = &id;
rc = mdb_cursor_get( cursor, &key, &data, MDB_SET );
if ( rc ) {
/* not found, drop this from ids */
copy = 0;
break;
}
ptr = data.mv_data;
ptr += data.mv_size - sizeof(ID);
memcpy( &id, ptr, sizeof(ID) );
if ( id == base ) {
if ( res[0] >= MDB_IDL_DB_SIZE-1 ) {
/* too many aliases in scope. Fallback to range */
MDB_IDL_RANGE( res, MDB_IDL_FIRST( ids ), MDB_IDL_LAST( ids ));
goto leave;
}
res[0]++;
res[res[0]] = ida;
copy = 0;
break;
}
if ( op->ors_scope == LDAP_SCOPE_ONELEVEL )
break;
}
if (idc) {
if (copy) {
if (ci0 != cid)
ids[ci0] = ids[cid];
ci0++;
} else
idc--;
}
ida = mdb_idl_next( ids, &cid );
}
if (!MDB_IDL_IS_RANGE( ids ))
ids[0] = idc;
leave:
mdb_cursor_close( cursor );
return rc;
}
int
mdb_idl_fetch_key(
BackendDB *be,
MDB_txn *txn,
MDB_dbi dbi,
MDB_val *key,
ID *ids,
MDB_cursor **saved_cursor,
int get_flag )
{
MDB_val data, key2, *kptr;
MDB_cursor *cursor;
ID *i;
size_t len;
int rc;
MDB_cursor_op opflag;
char keybuf[16];
Debug( LDAP_DEBUG_ARGS,
"mdb_idl_fetch_key: %s\n",
mdb_show_key( keybuf, key->mv_data, key->mv_size ), 0, 0 );
assert( ids != NULL );
if ( saved_cursor && *saved_cursor ) {
opflag = MDB_NEXT;
} else if ( get_flag == LDAP_FILTER_GE ) {
opflag = MDB_SET_RANGE;
} else if ( get_flag == LDAP_FILTER_LE ) {
opflag = MDB_FIRST;
} else {
opflag = MDB_SET;
}
/* If we're not reusing an existing cursor, get a new one */
if( opflag != MDB_NEXT ) {
rc = mdb_cursor_open( txn, dbi, &cursor );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY, "=> mdb_idl_fetch_key: "
"cursor failed: %s (%d)\n", mdb_strerror(rc), rc, 0 );
return rc;
}
} else {
cursor = *saved_cursor;
}
/* If this is a LE lookup, save original key so we can determine
* when to stop. If this is a GE lookup, save the key since it
* will be overwritten.
*/
if ( get_flag == LDAP_FILTER_LE || get_flag == LDAP_FILTER_GE ) {
key2.mv_data = keybuf;
key2.mv_size = key->mv_size;
AC_MEMCPY( keybuf, key->mv_data, key->mv_size );
kptr = &key2;
} else {
kptr = key;
}
len = key->mv_size;
rc = mdb_cursor_get( cursor, kptr, &data, opflag );
/* skip presence key on range inequality lookups */
while (rc == 0 && kptr->mv_size != len) {
rc = mdb_cursor_get( cursor, kptr, &data, MDB_NEXT_NODUP );
}
/* If we're doing a LE compare and the new key is greater than
* our search key, we're done
*/
if (rc == 0 && get_flag == LDAP_FILTER_LE && memcmp( kptr->mv_data,
key->mv_data, key->mv_size ) > 0 ) {
rc = MDB_NOTFOUND;
}
if (rc == 0) {
i = ids+1;
rc = mdb_cursor_get( cursor, key, &data, MDB_GET_MULTIPLE );
while (rc == 0) {
memcpy( i, data.mv_data, data.mv_size );
i += data.mv_size / sizeof(ID);
rc = mdb_cursor_get( cursor, key, &data, MDB_NEXT_MULTIPLE );
}
if ( rc == MDB_NOTFOUND ) rc = 0;
ids[0] = i - &ids[1];
/* On disk, a range is denoted by 0 in the first element */
if (ids[1] == 0) {
if (ids[0] != MDB_IDL_RANGE_SIZE) {
Debug( LDAP_DEBUG_ANY, "=> mdb_idl_fetch_key: "
"range size mismatch: expected %d, got %ld\n",
MDB_IDL_RANGE_SIZE, ids[0], 0 );
mdb_cursor_close( cursor );
return -1;
}
MDB_IDL_RANGE( ids, ids[2], ids[3] );
}
data.mv_size = MDB_IDL_SIZEOF(ids);
}
if ( saved_cursor && rc == 0 ) {
if ( !*saved_cursor )
*saved_cursor = cursor;
}
else
mdb_cursor_close( cursor );
if( rc == MDB_NOTFOUND ) {
return rc;
} else if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY, "=> mdb_idl_fetch_key: "
"get failed: %s (%d)\n",
mdb_strerror(rc), rc, 0 );
return rc;
} else if ( data.mv_size == 0 || data.mv_size % sizeof( ID ) ) {
/* size not multiple of ID size */
Debug( LDAP_DEBUG_ANY, "=> mdb_idl_fetch_key: "
"odd size: expected %ld multiple, got %ld\n",
(long) sizeof( ID ), (long) data.mv_size, 0 );
return -1;
} else if ( data.mv_size != MDB_IDL_SIZEOF(ids) ) {
/* size mismatch */
Debug( LDAP_DEBUG_ANY, "=> mdb_idl_fetch_key: "
"get size mismatch: expected %ld, got %ld\n",
(long) ((1 + ids[0]) * sizeof( ID )), (long) data.mv_size, 0 );
return -1;
}
return rc;
}
