Ejemplo n.º 1
0
    def add_disk(self, disk_path):
        if os.path.islink(disk_path):
            disk_path = os.path.realpath(disk_path)
        disk = Disk.from_path(disk_path)
        hdd_group = LinearTable(self.group_name)
        assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name

        hdd_group.insert_disk(disk)
        dm = Dmsetup()
        cache_dev = dm.mapdev_prefix + self._cache_name()
        cached_table = '0 %d linear %s %d' % (disk.size, cache_dev, disk.start)
        cached_disk_name = self._cached_disk_name(disk.dev)

        dm.create_table(cached_disk_name, cached_table)
        return dm.mapdev_prefix + cached_disk_name
Ejemplo n.º 2
0
    def add_disk(self, disk_path):
        if os.path.islink(disk_path):
            disk_path = os.path.realpath(disk_path)
        disk = Disk.from_path(disk_path, root_helper=self.root_helper)
        hdd_group = LinearTable(self.group_name, root_helper=self.root_helper)
        assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name

        hdd_group.insert_disk(disk)
        dm = Dmsetup(root_helper=self.root_helper)
        cache_dev = dm.mapdev_prefix + self._cache_name()
        cached_table = '0 %d linear %s %d' % (disk.size, cache_dev, disk.start)
        cached_disk_name = self._cached_disk_name(disk.dev)

        dm.create_table(cached_disk_name, cached_table)
        return dm.mapdev_prefix + cached_disk_name
Ejemplo n.º 3
0
    def create_group(self, ssds, block_size, pattern):
        #TODO: roll back if failed
        group_name = self.group_name
        hdd_size = '1P'
        hdd_sectors = utils.bytes2sectors(hdd_size)
        hdd = Disk.from_error(hdd_sectors, root_helper=self.root_helper)
        hdd_group = LinearTable.from_disks(group_name, [hdd], root_helper=self.root_helper)

        ssd_name = self._ssd_name()
        ssd_group = LinearTable.from_disks(ssd_name, ssds,  root_helper=self.root_helper)

        fc = Flashcache(root_helper=self.root_helper)
        cache_name = self._cache_name()
        cache_dev = fc.create(cache_name, ssd_group.path, hdd_group.path, block_size, pattern)
        return cache_dev
Ejemplo n.º 4
0
    def create_group(self, ssds, block_size, pattern):
        #TODO: roll back if failed
        group_name = self.group_name
        dm = Dmsetup()
        hdd_size = '1P'
        hdd_sectors = utils.bytes2sectors(hdd_size)
        hdd = Disk.from_error(hdd_sectors)
        hdd_group = LinearTable.from_disks(group_name, [hdd])

        ssd_name = self._ssd_name()
        ssd_group = LinearTable.from_disks(ssd_name, ssds)

        fc = Flashcache()
        cache_name = self._cache_name()
        cache_Dev = fc.create(cache_name, ssd_group.path, hdd_group.path, block_size, pattern)
Ejemplo n.º 5
0
    def create_group(self, ssds, block_size, pattern):
        #TODO: roll back if failed
        group_name = self.group_name
        dm = Dmsetup()
        hdd_size = '1P'
        hdd_sectors = utils.bytes2sectors(hdd_size)
        hdd = Disk.from_error(hdd_sectors)
        hdd_group = LinearTable.from_disks(group_name, [hdd])

        ssd_name = self._ssd_name()
        ssd_group = LinearTable.from_disks(ssd_name, ssds)

        fc = Flashcache()
        cache_name = self._cache_name()
        cache_Dev = fc.create(cache_name, ssd_group.path, hdd_group.path,
                              block_size, pattern)
Ejemplo n.º 6
0
    def rm_disk(self, disk_path):
        if os.path.islink(disk_path):
            disk_path = os.path.realpath(disk_path)
        hdd_group = LinearTable(self.group_name, root_helper=self.root_helper)
        assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
        disk = hdd_group.find_disk(disk_path)

        dm = Dmsetup(root_helper=self.root_helper)
        cached_name = self._cached_disk_name(disk.dev)

        cache_name = self._cache_name()
        cache_dev = dm.mapdev_prefix + cache_name
        cache_table = dm.get_table(cache_name)
        fc = Flashcache(root_helper=self.root_helper)
        block_size = fc.get_block_size(cache_table)
        start_blk, offset_blk = utils.sector_offset2block_offset(disk.start, disk.size, block_size)
        fc.invalid(cache_dev, start_blk, offset_blk)

        dm.remove_table(cached_name)
        hdd_group.remove_disk(disk)
Ejemplo n.º 7
0
    def delete_group(self):
        hdd_group = LinearTable(self.group_name)
        assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
        dm = Dmsetup()
        #TODO: check for wether busy
        for disk in hdd_group.disks:
            if disk.mapper != 'error':
                cached_name = self._cached_disk_name(disk.dev)
                dm.remove_table(cached_name)

        fc = Flashcache()
        cache_name = self._cache_name()
        cache_table = dm.get_table(cache_name)
        ssd_dev = fc.get_ssd_dev(cache_table)
        dm.remove_table(cache_name)
        fc.destroy(ssd_dev)

        dm.remove_table(self._ssd_name())
        dm.remove_table(self.group_name)