def extend_fs(fs_type, fs_dev):
if fs_type in ('ext2', 'ext3', 'ext4'):
# ext3,4 file system can be mounted
# must be checked with e2fsck -f
utils.execute('e2fsck', '-yf', fs_dev, check_exit_code=[0])
utils.execute('resize2fs', fs_dev, check_exit_code=[0])
elif fs_type == 'xfs':
# xfs file system must be mounted
utils.execute('xfs_growfs', fs_dev, check_exit_code=[0])
else:
raise errors.FsUtilsError('Unsupported file system type')
def make_fs(fs_type, fs_options, fs_label, dev):
# NOTE(agordeev): notice the different flag to force the fs creating
# ext* uses -F flag, xfs/mkswap uses -f flag.
cmd_line = []
#通过mkswap创建swap分区
cmd_name = 'mkswap'
if fs_type != 'swap':
#通过mkfs.ext4创建ext4
cmd_name = 'mkfs.%s' % fs_type
if fs_type == 'xfs':
# NOTE(agordeev): force xfs creation.
# Othwerwise, it will fail to proceed if filesystem exists.
fs_options += ' -f '
if fs_type == 'swap':
fs_options += ' -f '
cmd_line.append(cmd_name)
for opt in (fs_options, format_fs_label(fs_label)):
cmd_line.extend([s for s in opt.split(' ') if s])
cmd_line.append(dev)
# NOTE(dbilunov): make sure the newly-created fs can
# be observed by blkid. Currently known problem is
# that generated UUID could possibly collide with
# minix filesystem magic (0x8f13)
mkfs_ok = False
for _ in six.moves.range(MAX_MKFS_TRIES):
#格式化文件系统
utils.execute(*cmd_line)
try:
utils.execute('blkid', '-c', '/dev/null', '-o', 'value', '-s',
'UUID', dev)
except errors.ProcessExecutionError:
LOG.warning('blkid has failed on %s, retrying...', dev)
else:
mkfs_ok = True
break
if not mkfs_ok:
raise errors.FsUtilsError('Cannot get UUID of a newly-created ' +
'{0} on {1}'.format(fs_type, dev))
