How to use partname_to_device method in autotest

Best Python code snippet using autotest_python

partition.py

Source:partition.py

...36               'mount_options=%r, fs_tag=%r)' %37               (self.fstype, self.mkfs_flags,38                self.mount_options, self.fs_tag))39        return val40def partname_to_device(part):41    """ Converts a partition name to its associated device """42    return os.path.join(os.sep, 'dev', part)43def list_mount_devices():44    devices = []45    # list mounted filesystems46    for line in utils.system_output('mount').splitlines():47        devices.append(line.split()[0])48    # list mounted swap devices49    for line in utils.system_output('swapon -s').splitlines():50        if line.startswith('/'):        # skip header line51            devices.append(line.split()[0])52    return devices53def list_mount_points():54    mountpoints = []55    for line in utils.system_output('mount').splitlines():56        mountpoints.append(line.split()[2])57    return mountpoints58def get_iosched_path(device_name, component):59    return '/sys/block/%s/queue/%s' % (device_name, component)60def wipe_filesystem(job, mountpoint):61    wipe_cmd = 'rm -rf %s/*' % mountpoint62    try:63        utils.system(wipe_cmd)64    except:65        job.record('FAIL', None, wipe_cmd, error.format_error())66        raise67    else:68        job.record('GOOD', None, wipe_cmd)69def is_linux_fs_type(device):70    """71    Checks if specified partition is type 8372    @param device: the device, e.g. /dev/sda373    @return: False if the supplied partition name is not type 83 linux, True74            otherwise75    """76    disk_device = device.rstrip('0123456789')77    # Parse fdisk output to get partition info.  Ugly but it works.78    fdisk_fd = os.popen("/sbin/fdisk -l -u '%s'" % disk_device)79    fdisk_lines = fdisk_fd.readlines()80    fdisk_fd.close()81    for line in fdisk_lines:82        if not line.startswith(device):83            continue84        info_tuple = line.split()85        # The Id will be in one of two fields depending on if the boot flag86        # was set.  Caveat: this assumes no boot partition will be 83 blocks.87        for fsinfo in info_tuple[4:6]:88            if fsinfo == '83':  # hex 83 is the linux fs partition type89                return True90    return False91def get_partition_list(job, min_blocks=0, filter_func=None, exclude_swap=True,92                       open_func=open):93    """94    Get a list of partition objects for all disk partitions on the system.95    Loopback devices and unnumbered (whole disk) devices are always excluded.96    @param job: The job instance to pass to the partition object97            constructor.98    @param min_blocks: The minimum number of blocks for a partition to99            be considered.100    @param filter_func: A callable that returns True if a partition is101            desired. It will be passed one parameter:102            The partition name (hdc3, etc.).103            Some useful filter functions are already defined in this module.104    @param exclude_swap: If True any partition actively in use as a swap105            device will be excluded.106    @param __open: Reserved for unit testing.107    @return: A list of L{partition} objects.108    """109    active_swap_devices = set()110    if exclude_swap:111        for swapline in open_func('/proc/swaps'):112            if swapline.startswith('/'):113                active_swap_devices.add(swapline.split()[0])114    partitions = []115    for partline in open_func('/proc/partitions').readlines():116        fields = partline.strip().split()117        if len(fields) != 4 or partline.startswith('major'):118            continue119        (major, minor, blocks, partname) = fields120        blocks = int(blocks)121        # The partition name better end with a digit, else it's not a partition122        if not partname[-1].isdigit():123            continue124        # We don't want the loopback device in the partition list125        if 'loop' in partname:126            continue127        device = partname_to_device(partname)128        if exclude_swap and device in active_swap_devices:129            logging.debug('Skipping %s - Active swap.', partname)130            continue131        if min_blocks and blocks < min_blocks:132            logging.debug('Skipping %s - Too small.', partname)133            continue134        if filter_func and not filter_func(partname):135            logging.debug('Skipping %s - Filter func.', partname)136            continue137        partitions.append(partition(job, device))138    return partitions139def get_mount_info(partition_list):140    """141    Picks up mount point information about the machine mounts. By default, we142    try to associate mount points with UUIDs, because in newer distros the143    partitions are uniquely identified using them.144    """145    mount_info = set()146    for p in partition_list:147        try:148            uuid = utils.system_output('blkid -p -s UUID -o value %s' % p.device)149        except error.CmdError:150            # fall back to using the partition151            uuid = p.device152        mount_info.add((uuid, p.get_mountpoint()))153    return mount_info154def filter_partition_list(partitions, devnames):155    """156    Pick and choose which partition to keep.157    filter_partition_list accepts a list of partition objects and a list158    of strings.  If a partition has the device name of the strings it159    is returned in a list.160    @param partitions: A list of L{partition} objects161    @param devnames: A list of devnames of the form '/dev/hdc3' that162                    specifies which partitions to include in the returned list.163    @return: A list of L{partition} objects specified by devnames, in the164             order devnames specified165    """166    filtered_list = []167    for p in partitions:168        for d in devnames:169            if p.device == d and p not in filtered_list:170                filtered_list.append(p)171    return filtered_list172def get_unmounted_partition_list(root_part, job=None, min_blocks=0,173                                 filter_func=None, exclude_swap=True,174                                 open_func=open):175    """176    Return a list of partition objects that are not mounted.177    @param root_part: The root device name (without the '/dev/' prefix, example178            'hda2') that will be filtered from the partition list.179            Reasoning: in Linux /proc/mounts will never directly mention the180            root partition as being mounted on / instead it will say that181            /dev/root is mounted on /. Thus require this argument to filter out182            the root_part from the ones checked to be mounted.183    @param job, min_blocks, filter_func, exclude_swap, open_func: Forwarded184            to get_partition_list().185    @return List of L{partition} objects that are not mounted.186    """187    partitions = get_partition_list(job=job, min_blocks=min_blocks,188        filter_func=filter_func, exclude_swap=exclude_swap, open_func=open_func)189    unmounted = []190    for part in partitions:191        if (part.device != partname_to_device(root_part) and192            not part.get_mountpoint(open_func=open_func)):193            unmounted.append(part)194    return unmounted195def parallel(partitions, method_name, *args, **dargs):196    """197    Run a partition method (with appropriate arguments) in parallel,198    across a list of partition objects199    """200    if not partitions:201        return202    job = partitions[0].job203    flist = []204    if (not hasattr(partition, method_name) or205                               not callable(getattr(partition, method_name))):...

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