コード例 #1
0
ファイル: journaler.py プロジェクト: yunleid/sm
 def _getAllEntries(self, readFile = True):
     lvList = self.lvmCache.getTagged(self.LV_TAG)
     entries = dict()
     for lvName in lvList:
         parts = lvName.split(self.SEPARATOR, 2)
         if len(parts) != 3:
             raise JournalerException("Bad LV name: %s" % lvName)
         type, id, val = parts
         if readFile:
             # For clone and leaf journals, additional
             # data is written inside file
             # TODO: Remove dependency on journal type
             if type == self.JRN_CLONE or type == self.JRN_LEAF:
                 fullPath = self.lvmCache._getPath(lvName)
                 self.lvmCache.activateNoRefcount(lvName,False)
                 fd = open_file(fullPath)
                 try:
                     try:
                         min_block_size = get_min_blk_size_wrapper(fd)
                         data = file_read_wrapper(fd, 0, min_block_size, min_block_size)
                         length, val = data.split(" ", 1)
                         val = val[:int(length)]
                     except:
                         raise JournalerException("Failed to read from journal %s" \
                               % lvName)
                 finally:
                     close(fd)
                     self.lvmCache.deactivateNoRefcount(lvName)
         if not entries.get(type):
             entries[type] = dict()
         entries[type][id] = val
     return entries
コード例 #2
0
ファイル: journaler.py プロジェクト: zoltan-kiss-citrix/sm
 def _getAllEntries(self):
     lvList = self.lvmCache.getTagged(self.LV_TAG)
     entries = dict()
     for lvName in lvList:
         parts = lvName.split(self.SEPARATOR, 2)
         if len(parts) != 3:
             raise JournalerException("Bad LV name: %s" % lvName)
         type, id, val = parts
         # For clone and leaf journals, additional
         # data is written inside file
         # TODO: Remove dependency on journal type
         if type == self.JRN_CLONE or type == self.JRN_LEAF:
             fullPath = self.lvmCache._getPath(lvName)
             self.lvmCache.activateNoRefcount(lvName,False)
             fd = open_file(fullPath)
             try:
                 try:
                     min_block_size = get_min_blk_size_wrapper(fd)
                     data = xs_file_read_wrapper(fd, 0, min_block_size, min_block_size)
                     length, val = data.split(" ", 1)
                     val = val[:int(length)]
                 except:
                    raise JournalerException("Failed to read from journal %s" \
                        % lvName)
             finally:
                 close(fd)
                 self.lvmCache.deactivateNoRefcount(lvName)
         if not entries.get(type):
             entries[type] = dict()
         entries[type][id] = val
     return entries
コード例 #3
0
ファイル: journaler.py プロジェクト: stormi/sm
    def create(self, type, id, val):
        """Create an entry of type "type" for "id" with the value "val".
        Error if such an entry already exists."""
        valExisting = self.get(type, id)
        writeData = False
        if valExisting:
            raise JournalerException("Journal already exists for '%s:%s': %s" \
                    % (type, id, valExisting))
        lvName = self._getNameLV(type, id, val)

        mapperDevice = self._getLVMapperName(lvName)
        if len(mapperDevice) > LVM_MAX_NAME_LEN:
            lvName = self._getNameLV(type, id)
            writeData = True
            mapperDevice = self._getLVMapperName(lvName)
            assert len(mapperDevice) <= LVM_MAX_NAME_LEN

        self.lvmCache.create(lvName, self.LV_SIZE, self.LV_TAG)

        if writeData:
            fullPath = self.lvmCache._getPath(lvName)
            fd = open_file(fullPath, True)
            try:
                e = None
                try:
                    min_block_size = get_min_blk_size_wrapper(fd)
                    data = "%d %s" % (len(val), val)
                    file_write_wrapper(fd, 0, min_block_size, data, len(data))
                except Exception as e:
                    raise
                finally:
                    try:
                        close(fd)
                        self.lvmCache.deactivateNoRefcount(lvName)
                    except Exception as e2:
                        msg = 'failed to close/deactivate %s: %s' \
                                % (lvName, e2)
                        if not e:
                            util.SMlog(msg)
                            raise e2
                        else:
                            util.SMlog('WARNING: %s (error ignored)' % msg)

            except:
                util.logException("journaler.create")
                try:
                    self.lvmCache.remove(lvName)
                except Exception as e:
                    util.SMlog('WARNING: failed to clean up failed journal ' \
                            ' creation: %s (error ignored)' % e)
                raise JournalerException("Failed to write to journal %s" \
                    % lvName)
コード例 #4
0
ファイル: journaler.py プロジェクト: zoltan-kiss-citrix/sm
    def create(self, type, id, val):
        """Create an entry of type "type" for "id" with the value "val".
        Error if such an entry already exists."""
        valExisting = self.get(type, id)
        writeData = False
        if valExisting:
            raise JournalerException("Journal already exists for '%s:%s': %s" \
                    % (type, id, valExisting))
        lvName = self._getNameLV(type, id, val)

        mapperDevice = self._getLVMapperName(lvName)
        if len(mapperDevice) > LVM_MAX_NAME_LEN:
            lvName = self._getNameLV(type, id)
            writeData = True
            mapperDevice = self._getLVMapperName(lvName)
            assert len(mapperDevice) <= LVM_MAX_NAME_LEN

        self.lvmCache.create(lvName, self.LV_SIZE, self.LV_TAG)

        if writeData:
            fullPath = self.lvmCache._getPath(lvName)
            fd =  open_file(fullPath, True)
            try:
                e = None
                try:
                    min_block_size = get_min_blk_size_wrapper(fd)
                    data = "%d %s" % (len(val), val)
                    xs_file_write_wrapper(fd, 0, min_block_size, data,
                            len(data))
                except Exception, e:
                    raise
                finally:
                    try:
                        close(fd)
                        self.lvmCache.deactivateNoRefcount(lvName)
                    except Exception, e2:
                        msg = 'failed to close/deactivate %s: %s' \
                                % (lvName, e2)
                        if not e:
                            util.SMlog(msg)
                            raise e2
                        else:
                            util.SMlog('WARNING: %s (error ignored)' % msg)