1 # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 import commands 6 import os 7 from autotest_lib.client.bin import test 8 from autotest_lib.client.common_lib import error 9 10 class build_RootFilesystemSize(test.test): 11 """Test that we have a minimal amount of free space on rootfs.""" 12 version = 1 13 14 15 PROD_IMAGE_ROOTFS_BYTES = '/root/bytes-rootfs-prod' 16 17 18 def run_once(self): 19 """Run the free space on rootfs test.""" 20 21 # Report the production size. 22 if os.path.exists(self.PROD_IMAGE_ROOTFS_BYTES): 23 rootfs_bytes_str = '' 24 with open(self.PROD_IMAGE_ROOTFS_BYTES, 'r') as f: 25 rootfs_bytes_str = f.read() 26 if rootfs_bytes_str: 27 self.output_perf_value('bytes_rootfs_prod', 28 value=float(rootfs_bytes_str), 29 units='bytes', 30 higher_is_better=False) 31 32 # Report the current (test) size. 33 (status, output) = commands.getstatusoutput( 34 'df -B1 --print-type / | tail -1') 35 if status != 0: 36 raise error.TestFail('Could not get size of rootfs') 37 38 # Expected output format: 39 # Filesystem Type 1B-blocks Used Available Use% Mounted on 40 # /dev/root ext2 1056858112 768479232 288378880 73% / 41 output_columns = output.split() 42 fs_type = output_columns[1] 43 used = int(output_columns[3]) 44 free = int(output_columns[4]) 45 46 self.output_perf_value('bytes_rootfs_test', value=float(used), 47 units='bytes', higher_is_better=False) 48 49 # Ignore squashfs as the free space will be reported as 0. 50 if fs_type == 'squashfs': 51 return 52 53 # Fail if we are running out of free space on rootfs (20 MiB or 54 # 2% free space). 55 required_free_space = min(20 * 1024 * 1024, used * 0.02) 56 57 if free < required_free_space: 58 raise error.TestFail('%s bytes free is less than the %s required.' % 59 (free, required_free_space)) 60
