コード例 #1
0
ファイル: srmetadata.py プロジェクト: euanh/sm
    def getMetadataInternal(self, params={}):
        try:
            lower = 0
            upper = 0
            retmap = {}
            sr_info_map = {}
            ret_vdi_info = {}
            length = getMetadataLength(self.fd)
            min_blk_size = get_min_blk_size_wrapper(self.fd)

            # Read in the metadata fil
            metadataxml = ''
            metadataxml = xs_file_read_wrapper(self.fd, 0, length,
                                               min_blk_size)

            # At this point we have the complete metadata in metadataxml
            offset = SECTOR_SIZE + len(XML_HEADER)
            sr_info = metadataxml[offset:SECTOR_SIZE * 4]
            offset = SECTOR_SIZE * 4
            sr_info = sr_info.replace('\x00', '')

            parsable_metadata = '%s<%s>%s</%s>' % (
                XML_HEADER, metadata.XML_TAG, sr_info, metadata.XML_TAG)
            retmap['sr_info'] = metadata._parseXML(parsable_metadata)

            # At this point we check if an offset has been passed in
            if params.has_key('offset'):
                upper = getBlockAlignedRange(min_blk_size, params['offset'], \
                                             0)[1]
            else:
                upper = length

            # Now look at the VDI objects
            while offset < upper:
                vdi_info = metadataxml[offset:offset +
                                       (SECTOR_SIZE *
                                        self.VDI_INFO_SIZE_IN_SECTORS)]
                vdi_info = vdi_info.replace('\x00', '')
                parsable_metadata = '%s<%s>%s</%s>' % (
                    XML_HEADER, metadata.XML_TAG, vdi_info, metadata.XML_TAG)
                vdi_info_map = metadata._parseXML(parsable_metadata)[VDI_TAG]
                vdi_info_map[OFFSET_TAG] = offset

                if not params.has_key('includeDeletedVdis') and \
                    vdi_info_map[VDI_DELETED_TAG] == '1':
                    offset += SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS
                    continue

                if params.has_key('indexByUuid'):
                    ret_vdi_info[vdi_info_map[UUID_TAG]] = vdi_info_map
                else:
                    ret_vdi_info[offset] = vdi_info_map

                if params.has_key('vdi_uuid'):
                    if vdi_info_map[UUID_TAG] == params['vdi_uuid']:
                        retmap['offset'] = offset
                        (lower, upper) = \
                            getBlockAlignedRange(min_blk_size, offset, \
                                        SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS)

                elif params.has_key('firstDeleted'):
                    if vdi_info_map[VDI_DELETED_TAG] == '1':
                        retmap['foundDeleted'] = 1
                        retmap['offset'] = offset
                        (lower, upper) = \
                            getBlockAlignedRange(min_blk_size, offset, \
                                        SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS)

                offset += SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS

            retmap['lower'] = lower
            retmap['upper'] = upper
            retmap['vdi_info'] = ret_vdi_info
            return retmap
        except Exception, e:
            util.SMlog("Exception getting metadata with params" \
                    "%s. Error: %s" % (params, str(e)))
            raise
コード例 #2
0
    def getMetadataInternal(self, params = {}):
        try:
            lower = 0; upper = 0
            retmap = {}; sr_info_map = {}; ret_vdi_info = {}
            length = getMetadataLength(self.fd)
            min_blk_size = get_min_blk_size_wrapper(self.fd)
           
            # Read in the metadata fil
            metadataxml = ''
            metadataxml = xs_file_read_wrapper(self.fd, 0, length, min_blk_size)
           
            # At this point we have the complete metadata in metadataxml
            offset = SECTOR_SIZE + len(XML_HEADER)
            sr_info = metadataxml[offset: SECTOR_SIZE * 4]
            offset = SECTOR_SIZE * 4
            sr_info = sr_info.replace('\x00','')
           
            parsable_metadata = '%s<%s>%s</%s>' % (XML_HEADER, metadata.XML_TAG, 
                                                   sr_info, metadata.XML_TAG)
           
            retmap['sr_info'] = metadata._parseXML(parsable_metadata)
            
            # At this point we check if an offset has been passed in
            if params.has_key('offset'):
                upper = getBlockAlignedRange(min_blk_size, params['offset'], \
                                             0)[1]
            else:
                upper = length
            
            # Now look at the VDI objects
            while offset < upper:
                vdi_info = metadataxml[offset: 
                                offset + 
                                (SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS)]
                vdi_info = vdi_info.replace('\x00','')
                parsable_metadata = '%s<%s>%s</%s>' % (XML_HEADER, metadata.XML_TAG, 
                                               vdi_info, metadata.XML_TAG)
                vdi_info_map = metadata._parseXML(parsable_metadata)[VDI_TAG]
                vdi_info_map[OFFSET_TAG] = offset
                
                if not params.has_key('includeDeletedVdis') and \
                    vdi_info_map[VDI_DELETED_TAG] == '1':
                    offset += SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS
                    continue
                
                if params.has_key('indexByUuid'):
                    ret_vdi_info[vdi_info_map[UUID_TAG]] = vdi_info_map
                else:
                    ret_vdi_info[offset] = vdi_info_map

                if params.has_key('vdi_uuid'):
                    if vdi_info_map[UUID_TAG] == params['vdi_uuid']:
                        retmap['offset'] = offset
                        (lower, upper) = \
                            getBlockAlignedRange(min_blk_size, offset, \
                                        SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS)
                    
                elif params.has_key('firstDeleted'):
                    if vdi_info_map[VDI_DELETED_TAG] == '1':
                        retmap['foundDeleted'] = 1
                        retmap['offset'] = offset
                        (lower, upper) = \
                            getBlockAlignedRange(min_blk_size, offset, \
                                        SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS)
                            
                offset += SECTOR_SIZE * self.VDI_INFO_SIZE_IN_SECTORS
                
            retmap['lower'] = lower
            retmap['upper'] = upper
            retmap['vdi_info'] = ret_vdi_info
            return retmap
        except Exception, e:
            util.SMlog("Exception getting metadata with params" \
                    "%s. Error: %s" % (params, str(e)))
            raise