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How to use mkfs_all_disks method in autotest

Best Python code snippet using autotest_python

fsdev_disks.py

Source:fsdev_disks.py

...108                        'fs_opts': fsopts,109                        'fs_mkfs': fsmkfs,110                        'mounted': mstat})111    return hd_list112def mkfs_all_disks(job, disk_list, fs_type, fs_makeopt, fs_mnt_opt):113    """114    Prepare all the drives in 'disk_list' for testing. For each disk this means115    unmounting any mount points that use the disk, running mkfs with 'fs_type'116    as the file system type and 'fs_makeopt' as the 'mkfs' options, and finally117    remounting the freshly formatted drive using the flags in 'fs_mnt_opt'.118    """119    for disk in disk_list:120        # For now, ext4 isn't quite ready for prime time121        if fs_type == "ext4":122            fs_type = "ext4dev"123        # Grab the device and mount paths for the drive124        dev_path = os.path.join('/dev', disk["device"])125        mnt_path = disk['mountpt']126        # Create a file system instance127        try:128            fs = job.filesystem(device=dev_path, mountpoint=mnt_path)129        except Exception:130            raise Exception("Could not create a filesystem on '%s'" % dev_path)131        # Make sure the volume is unmounted132        if disk["mounted"]:133            try:134                fs.unmount(mnt_path)135            except Exception as info:136                raise Exception("umount failed: exception = %s, args = %s" %137                                (sys.exc_info()[0], info.args))138            except Exception:139                raise Exception("Could not unmount device ", dev_path)140        # Is the drive already formatted with the right file system?141        skip_mkfs = match_fs(disk, dev_path, fs_type, fs_makeopt)142        # Next step is to create a fresh file system (if we need to)143        try:144            if not skip_mkfs:145                fs.mkfs(fstype=fs_type, args=fs_makeopt)146        except Exception:147            raise Exception("Could not 'mkfs " + "-t " + fs_type + " " +148                            fs_makeopt + " " + dev_path + "'")149        # Mount the drive with the appropriate FS options150        try:151            opts = ""152            if fs_mnt_opt != "":153                opts += " -o " + fs_mnt_opt154            fs.mount(mountpoint=mnt_path, fstype=fs_type, args=opts)155        except NameError as info:156            raise Exception("mount name error: %s" % info)157        except Exception as info:158            raise Exception("mount failed: exception = %s, args = %s" %159                            (type(info), info.args))160        # If we skipped mkfs we need to wipe the partition clean161        if skip_mkfs:162            fs.wipe()163        # Record the new file system type and options in the disk list164        disk["mounted"] = True165        disk["fs_type"] = fs_type166        disk["fs_mkfs"] = fs_makeopt167        disk["fs_opts"] = fs_mnt_opt168    # Try to wipe the file system slate clean169    utils.drop_caches()170# XXX(gps): Remove this code once refactoring is complete to get rid of these171# nasty test description strings.172def _legacy_str_to_test_flags(fs_desc_string):173    """Convert a legacy FS_LIST string into a partition.FsOptions instance."""174    match = re.search('(.*?)/(.*?)/(.*?)/(.*)$', fs_desc_string.strip())175    if not match:176        raise ValueError('unrecognized FS list entry %r' % fs_desc_string)177    flags_obj = partition.FsOptions(fstype=match.group(1).strip(),178                                    mkfs_flags=match.group(2).strip(),179                                    mount_options=match.group(3).strip(),180                                    fs_tag=match.group(4).strip())181    return flags_obj182def prepare_disks(job, fs_desc, disk1_only=False, disk_list=None):183    """184    Prepare drive(s) to contain the file system type / options given in the185    description line 'fs_desc'. When 'disk_list' is not None, we prepare all186    the drives in that list; otherwise we pick the first available data drive187    (which is usually hdc3) and prepare just that one drive.188    Args:189      fs_desc: A partition.FsOptions instance describing the test -OR- a190          legacy string describing the same in '/' separated format:191              'fstype / mkfs opts / mount opts / short name'.192      disk1_only: Boolean, defaults to False.  If True, only test the first193          disk.194      disk_list: A list of disks to prepare.  If None is given we default to195          asking get_disk_list().196    Returns:197      (mount path of the first disk, short name of the test, list of disks)198      OR (None, '', None) if no fs_desc was given.199    """200    # Special case - do nothing if caller passes no description.201    if not fs_desc:202        return (None, '', None)203    if not isinstance(fs_desc, partition.FsOptions):204        fs_desc = _legacy_str_to_test_flags(fs_desc)205    # If no disk list was given, we'll get it ourselves206    if not disk_list:207        disk_list = get_disk_list()208    # Make sure we have the appropriate 'mkfs' binary for the file system209    mkfs_bin = 'mkfs.' + fs_desc.fstype210    if fs_desc.fstype == 'ext4':211        mkfs_bin = 'mkfs.ext4dev'212    try:213        utils.system('which ' + mkfs_bin)214    except Exception:215        try:216            mkfs_bin = os.path.join(job.toolsdir, mkfs_bin)217            utils.system('cp -ufp %s /sbin' % mkfs_bin)218        except Exception:219            raise error.TestError('No mkfs binary available for ' +220                                  fs_desc.fstype)221    # For 'ext4' we need to add '-E test_fs' to the mkfs options222    if fs_desc.fstype == 'ext4':223        fs_desc.mkfs_flags += ' -E test_fs'224    # If the caller only needs one drive, grab the first one only225    if disk1_only:226        disk_list = disk_list[0:1]227    # We have all the info we need to format the drives228    mkfs_all_disks(job, disk_list, fs_desc.fstype,229                   fs_desc.mkfs_flags, fs_desc.mount_options)230    # Return(mount path of the first disk, test tag value, disk_list)231    return (disk_list[0]['mountpt'], fs_desc.fs_tag, disk_list)232def restore_disks(job, restore=False, disk_list=None):233    """234    Restore ext2 on the drives in 'disk_list' if 'restore' is True; when235    disk_list is None, we do nothing.236    """237    if restore and disk_list is not None:238        prepare_disks(job, 'ext2 / -q -i20480 -m1 / / restore_ext2',239                           disk1_only=False,240                           disk_list=disk_list)241def wipe_disks(job, disk_list):242    """...

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